diff --git a/Android.bp b/Android.bp
index c6f6251..0b4a925 100644
--- a/Android.bp
+++ b/Android.bp
@@ -2,5 +2,3 @@
     name: "android_filesystem_config_header",
     srcs: ["include/private/android_filesystem_config.h"],
 }
-
-subdirs = ["*"]
diff --git a/CleanSpec.mk b/CleanSpec.mk
index f6ef906..c84bd24 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -88,3 +88,5 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/root/product_services)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/product_services)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/debug_ramdisk/product_services)
+$(call add-clean-step, find $(PRODUCT_OUT) -type l -name "charger" -print0 | xargs -0 rm -f)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/system/bin/adbd)
diff --git a/TEST_MAPPING b/TEST_MAPPING
index cc1978d..d6945e3 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -10,7 +10,7 @@
       "name": "debuggerd_test"
     },
     {
-      "name": "fs_mgr_unit_test"
+      "name": "CtsFsMgrTestCases"
     },
     {
       "name": "fs_mgr_vendor_overlay_test"
@@ -22,6 +22,12 @@
       "name": "libpackagelistparser_test"
     },
     {
+      "name": "libcutils_test"
+    },
+    {
+      "name": "libmodprobe_tests"
+    },
+    {
       "name": "libprocinfo_test"
     },
     {
diff --git a/adb/Android.bp b/adb/Android.bp
index 170053b..675525c 100644
--- a/adb/Android.bp
+++ b/adb/Android.bp
@@ -114,6 +114,66 @@
     },
 }
 
+// libadbconnection
+// =========================================================
+// libadbconnection_client/server implement the socket handling for jdwp
+// forwarding and the track-jdwp service.
+cc_library {
+    name: "libadbconnection_server",
+    srcs: ["adbconnection/adbconnection_server.cpp"],
+
+    export_include_dirs: ["adbconnection/include"],
+
+    stl: "libc++_static",
+    shared_libs: ["liblog"],
+    static_libs: ["libbase"],
+
+    defaults: ["adbd_defaults", "host_adbd_supported"],
+
+    // Avoid getting duplicate symbol of android::build::getbuildnumber().
+    use_version_lib: false,
+
+    recovery_available: true,
+    compile_multilib: "both",
+}
+
+cc_library {
+    name: "libadbconnection_client",
+    srcs: ["adbconnection/adbconnection_client.cpp"],
+
+    export_include_dirs: ["adbconnection/include"],
+
+    stl: "libc++_static",
+    shared_libs: ["liblog"],
+    static_libs: ["libbase"],
+
+    defaults: ["adbd_defaults"],
+    visibility: [
+        "//art:__subpackages__",
+        "//system/core/adb/apex:__subpackages__",
+    ],
+    apex_available: [
+        "com.android.adbd",
+        "test_com.android.adbd",
+    ],
+
+    // libadbconnection_client doesn't need an embedded build number.
+    use_version_lib: false,
+
+    target: {
+        linux: {
+            version_script: "adbconnection/libadbconnection_client.map.txt",
+        },
+    },
+    stubs: {
+        symbol_file: "adbconnection/libadbconnection_client.map.txt",
+        versions: ["1"],
+    },
+
+    host_supported: true,
+    compile_multilib: "both",
+}
+
 // libadb
 // =========================================================
 // These files are compiled for both the host and the device.
@@ -134,6 +194,7 @@
     "transport_fd.cpp",
     "transport_local.cpp",
     "transport_usb.cpp",
+    "types.cpp",
 ]
 
 libadb_posix_srcs = [
@@ -216,6 +277,7 @@
         "libcutils",
         "libcrypto_utils",
         "libcrypto",
+        "liblog",
         "libmdnssd",
         "libdiagnose_usb",
         "libusb",
@@ -262,6 +324,7 @@
 cc_binary_host {
     name: "adb",
 
+    stl: "libc++_static",
     defaults: ["adb_defaults"],
 
     srcs: [
@@ -302,8 +365,6 @@
         "libz",
     ],
 
-    stl: "libc++_static",
-
     // Don't add anything here, we don't want additional shared dependencies
     // on the host adb tool, and shared libraries that link against libc++
     // will violate ODR
@@ -361,6 +422,7 @@
     ],
 
     shared_libs: [
+        "libadbd_auth",
         "libasyncio",
         "libbase",
         "libcrypto",
@@ -414,6 +476,7 @@
     ],
 
     shared_libs: [
+        "libadbd_auth",
         "libasyncio",
         "libbase",
         "libcrypto",
@@ -428,18 +491,10 @@
                 "daemon/abb_service.cpp",
                 "daemon/framebuffer_service.cpp",
                 "daemon/mdns.cpp",
-                "daemon/reboot_service.cpp",
                 "daemon/restart_service.cpp",
-                "daemon/set_verity_enable_state_service.cpp",
-            ],
-            static_libs: [
-                "libavb_user",
             ],
             shared_libs: [
-                "libbootloader_message",
                 "libmdnssd",
-                "libfec",
-                "libfs_mgr",
                 "libselinux",
             ],
         },
@@ -456,7 +511,7 @@
     defaults: ["adbd_defaults", "host_adbd_supported"],
     recovery_available: true,
 
-    // Avoid getting duplicate symbol of android::build::GetBuildNumber().
+    // avoid getting duplicate symbol of android::build::getbuildnumber().
     use_version_lib: false,
 
     // libminadbd wants both, as it's used to build native tests.
@@ -464,10 +519,12 @@
 
     // libadbd doesn't build any additional source, but to expose libadbd_core as a shared library.
     whole_static_libs: [
+        "libadbconnection_server",
         "libadbd_core",
     ],
 
     shared_libs: [
+        "libadbd_auth",
         "libadbd_services",
         "libasyncio",
         "libbase",
@@ -485,6 +542,7 @@
 cc_binary {
     name: "adbd",
     defaults: ["adbd_defaults", "host_adbd_supported"],
+    stl: "libc++_static",
     recovery_available: true,
 
     srcs: [
@@ -500,63 +558,43 @@
         keep_symbols: true,
     },
 
-    shared_libs: [
-        "libadbd",
-        "libadbd_services",
-        "libbase",
-        "libcap",
-        "libcrypto",
-        "libcutils",
-        "liblog",
-        "libminijail",
-        "libselinux",
-    ],
-}
-
-cc_binary {
-    name: "static_adbd",
-    defaults: ["adbd_defaults", "host_adbd_supported"],
-
-    recovery_available: false,
-    static_executable: true,
-    host_supported: false,
-
-    srcs: [
-        "daemon/main.cpp",
-    ],
-
-    cflags: [
-        "-D_GNU_SOURCE",
-        "-Wno-deprecated-declarations",
-    ],
-
-    strip: {
-        keep_symbols: true,
-    },
-
     static_libs: [
         "libadbconnection_server",
         "libadbd",
         "libadbd_services",
         "libasyncio",
-        "libavb_user",
         "libbase",
-        "libbootloader_message",
         "libcap",
-        "libcrypto_static",
         "libcrypto_utils",
         "libcutils",
         "libdiagnose_usb",
-        "libext4_utils",
-        "libfec",
-        "libfec_rs",
-        "libfs_mgr",
         "liblog",
-        "liblp",
         "libmdnssd",
         "libminijail",
         "libselinux",
-        "libsquashfs_utils",
+    ],
+
+    shared_libs: [
+        "libadbd_auth",
+        "libcrypto",
+    ],
+
+    required: ["libadbd_auth"],
+}
+
+phony {
+    name: "adbd_system_binaries",
+    required: [
+        "abb",
+        "reboot",
+        "set-verity-state",
+    ]
+}
+
+phony {
+    name: "adbd_system_binaries_recovery",
+    required: [
+        "reboot.recovery",
     ],
 }
 
@@ -564,6 +602,7 @@
     name: "abb",
 
     defaults: ["adbd_defaults"],
+    stl: "libc++",
     recovery_available: false,
 
     srcs: [
@@ -596,7 +635,11 @@
 
 cc_test {
     name: "adbd_test",
+
     defaults: ["adbd_defaults"],
+    stl: "libc++_static",
+
+    recovery_available: false,
     srcs: libadb_test_srcs + [
         "daemon/services.cpp",
         "daemon/shell_service.cpp",
@@ -607,8 +650,8 @@
 
     static_libs: [
         "libadbd",
+        "libadbd_auth",
         "libbase",
-        "libbootloader_message",
         "libcutils",
         "libcrypto_utils",
         "libcrypto_static",
@@ -618,7 +661,7 @@
         "libmdnssd",
         "libselinux",
     ],
-    test_suites: ["device-tests"],
+    test_suites: ["device-tests", "mts"],
     require_root: true,
 }
 
@@ -653,10 +696,10 @@
     test_suites: ["general-tests"],
     version: {
         py2: {
-            enabled: true,
+            enabled: false,
         },
         py3: {
-            enabled: false,
+            enabled: true,
         },
     },
 }
@@ -701,7 +744,6 @@
         "libziparchive",
         "libz",
     ],
-    stl: "libc++_static",
     proto: {
         type: "lite",
         export_proto_headers: true,
diff --git a/adb/SOCKET-ACTIVATION.txt b/adb/SOCKET-ACTIVATION.txt
new file mode 100644
index 0000000..4ef62ac
--- /dev/null
+++ b/adb/SOCKET-ACTIVATION.txt
@@ -0,0 +1,42 @@
+adb can be configured to work with systemd-style socket activation,
+allowing the daemon to start automatically when the adb control port
+is forwarded across a network. You need two files, placed in the usual
+systemd service directories (e.g., ~/.config/systemd/user for a user
+service).
+
+adb.service:
+
+--- START adb.service CUT HERE ---
+[Unit]
+Description=adb
+After=adb.socket
+Requires=adb.socket
+[Service]
+Type=simple
+# FD 3 is part of the systemd interface
+ExecStart=/path/to/adb server nodaemon -L acceptfd:3
+--- END adb.service CUT HERE ---
+
+--- START adb.socket CUT HERE ---
+[Unit]
+Description=adb
+PartOf=adb.service
+[Socket]
+ListenStream=127.0.0.1:5037
+Accept=no
+[Install]
+WantedBy=sockets.target
+--- END adb.socket CUT HERE ---
+
+After installing the adb service, the adb server will be started
+automatically on any connection to 127.0.0.1:5037 (the default adb
+control port), even after adb kill-server kills the server.
+
+Other "superserver" launcher systems (like macOS launchd) can be
+configured analogously. The important part is that adb be started with
+"server" and "nodaemon" command line arguments and that the listen
+address (passed to -L) name a file descriptor that's ready to
+accept(2) connections and that's already bound to the desired address
+and listening. inetd-style pre-accepted sockets do _not_ work in this
+configuration: the file descriptor passed to acceptfd must be the
+serve socket, not the accepted connection socket.
diff --git a/adb/adb.cpp b/adb/adb.cpp
index 1ec145b..460ddde 100644
--- a/adb/adb.cpp
+++ b/adb/adb.cpp
@@ -300,6 +300,7 @@
     handle_online(t);
 #else
     if (!auth_required) {
+        LOG(INFO) << "authentication not required";
         handle_online(t);
         send_connect(t);
     } else {
@@ -1166,7 +1167,7 @@
         std::string host;
         int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
         std::string error;
-        if (address.starts_with("vsock:")) {
+        if (address.starts_with("vsock:") || address.starts_with("localfilesystem:")) {
             serial = address;
         } else if (!android::base::ParseNetAddress(address, &host, &port, &serial, &error)) {
             SendFail(reply_fd, android::base::StringPrintf("couldn't parse '%s': %s",
diff --git a/adb/adb.h b/adb/adb.h
index c6cb06a..7f7dd0d 100644
--- a/adb/adb.h
+++ b/adb/adb.h
@@ -185,14 +185,7 @@
     } while (0)
 #endif
 
-#if ADB_HOST_ON_TARGET
-/* adb and adbd are coexisting on the target, so use 5038 for adb
- * to avoid conflicting with adbd's usage of 5037
- */
-#define DEFAULT_ADB_PORT 5038
-#else
 #define DEFAULT_ADB_PORT 5037
-#endif
 
 #define DEFAULT_ADB_LOCAL_TRANSPORT_PORT 5555
 
@@ -200,7 +193,7 @@
 #define ADB_SUBCLASS 0x42
 #define ADB_PROTOCOL 0x1
 
-void local_init(int port);
+void local_init(const std::string& addr);
 bool local_connect(int port);
 int local_connect_arbitrary_ports(int console_port, int adb_port, std::string* error);
 
diff --git a/adb/adbconnection/.clang-format b/adb/adbconnection/.clang-format
new file mode 120000
index 0000000..e545823
--- /dev/null
+++ b/adb/adbconnection/.clang-format
@@ -0,0 +1 @@
+../../.clang-format-2
\ No newline at end of file
diff --git a/adb/adbconnection/adbconnection_client.cpp b/adb/adbconnection/adbconnection_client.cpp
new file mode 100644
index 0000000..ee48abb
--- /dev/null
+++ b/adb/adbconnection/adbconnection_client.cpp
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "adbconnection/client.h"
+
+#include <pwd.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <memory>
+#include <optional>
+
+#include <android-base/cmsg.h>
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+
+using android::base::unique_fd;
+
+static constexpr char kJdwpControlName[] = "\0jdwp-control";
+
+struct AdbConnectionClientContext {
+  unique_fd control_socket_;
+};
+
+bool SocketPeerIsTrusted(int fd) {
+  ucred cr;
+  socklen_t cr_length = sizeof(cr);
+  if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_length) != 0) {
+    PLOG(ERROR) << "couldn't get socket credentials";
+    return false;
+  }
+
+  passwd* shell = getpwnam("shell");
+  if (cr.uid != 0 && cr.uid != shell->pw_uid) {
+    LOG(ERROR) << "untrusted uid " << cr.uid << " on other end of socket";
+    return false;
+  }
+
+  return true;
+}
+
+AdbConnectionClientContext* adbconnection_client_new(
+    const AdbConnectionClientInfo* const* info_elems, size_t info_count) {
+  auto ctx = std::make_unique<AdbConnectionClientContext>();
+
+  std::optional<uint64_t> pid;
+  std::optional<bool> debuggable;
+
+  for (size_t i = 0; i < info_count; ++i) {
+    auto info = info_elems[i];
+    switch (info->type) {
+      case AdbConnectionClientInfoType::pid:
+        if (pid) {
+          LOG(ERROR) << "multiple pid entries in AdbConnectionClientInfo, ignoring";
+          continue;
+        }
+        pid = info->data.pid;
+        break;
+
+      case AdbConnectionClientInfoType::debuggable:
+        if (debuggable) {
+          LOG(ERROR) << "multiple debuggable entries in AdbConnectionClientInfo, ignoring";
+          continue;
+        }
+        debuggable = info->data.pid;
+        break;
+    }
+  }
+
+  if (!pid) {
+    LOG(ERROR) << "AdbConnectionClientInfo missing required field pid";
+    return nullptr;
+  }
+
+  if (!debuggable) {
+    LOG(ERROR) << "AdbConnectionClientInfo missing required field debuggable";
+    return nullptr;
+  }
+
+  ctx->control_socket_.reset(socket(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0));
+  if (ctx->control_socket_ < 0) {
+    PLOG(ERROR) << "failed to create Unix domain socket";
+    return nullptr;
+  }
+
+  struct timeval timeout;
+  timeout.tv_sec = 1;
+  timeout.tv_usec = 0;
+  setsockopt(ctx->control_socket_.get(), SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
+
+  sockaddr_un addr = {};
+  addr.sun_family = AF_UNIX;
+  memcpy(addr.sun_path, kJdwpControlName, sizeof(kJdwpControlName));
+  size_t addr_len = offsetof(sockaddr_un, sun_path) + sizeof(kJdwpControlName) - 1;
+
+  int rc = connect(ctx->control_socket_.get(), reinterpret_cast<sockaddr*>(&addr), addr_len);
+  if (rc != 0) {
+    PLOG(ERROR) << "failed to connect to jdwp control socket";
+    return nullptr;
+  }
+
+  bool trusted = SocketPeerIsTrusted(ctx->control_socket_.get());
+  if (!trusted) {
+    LOG(ERROR) << "adb socket is not trusted, aborting connection";
+    return nullptr;
+  }
+
+  uint32_t pid_u32 = static_cast<uint32_t>(*pid);
+  rc = TEMP_FAILURE_RETRY(write(ctx->control_socket_.get(), &pid_u32, sizeof(pid_u32)));
+  if (rc != sizeof(pid_u32)) {
+    PLOG(ERROR) << "failed to send JDWP process pid to adbd";
+  }
+
+  return ctx.release();
+}
+
+void adbconnection_client_destroy(AdbConnectionClientContext* ctx) {
+  delete ctx;
+}
+
+int adbconnection_client_pollfd(AdbConnectionClientContext* ctx) {
+  return ctx->control_socket_.get();
+}
+
+int adbconnection_client_receive_jdwp_fd(AdbConnectionClientContext* ctx) {
+  char dummy;
+  unique_fd jdwp_fd;
+  ssize_t rc = android::base::ReceiveFileDescriptors(ctx->control_socket_, &dummy, 1, &jdwp_fd);
+  if (rc != 1) {
+    return rc;
+  }
+  return jdwp_fd.release();
+}
diff --git a/adb/adbconnection/adbconnection_server.cpp b/adb/adbconnection/adbconnection_server.cpp
new file mode 100644
index 0000000..939da2f
--- /dev/null
+++ b/adb/adbconnection/adbconnection_server.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "adbconnection/server.h"
+
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+#include <algorithm>
+#include <array>
+#include <vector>
+
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+
+using android::base::unique_fd;
+
+#define JDWP_CONTROL_NAME "\0jdwp-control"
+#define JDWP_CONTROL_NAME_LEN (sizeof(JDWP_CONTROL_NAME) - 1)
+
+static_assert(JDWP_CONTROL_NAME_LEN <= sizeof(reinterpret_cast<sockaddr_un*>(0)->sun_path));
+
+// Listen for incoming jdwp clients forever.
+void adbconnection_listen(void (*callback)(int fd, pid_t pid)) {
+  sockaddr_un addr = {};
+  socklen_t addrlen = JDWP_CONTROL_NAME_LEN + sizeof(addr.sun_family);
+
+  addr.sun_family = AF_UNIX;
+  memcpy(addr.sun_path, JDWP_CONTROL_NAME, JDWP_CONTROL_NAME_LEN);
+
+  unique_fd s(socket(AF_UNIX, SOCK_SEQPACKET | SOCK_NONBLOCK | SOCK_CLOEXEC, 0));
+  if (s < 0) {
+    PLOG(ERROR) << "failed to create JDWP control socket";
+    return;
+  }
+
+  if (bind(s.get(), reinterpret_cast<sockaddr*>(&addr), addrlen) < 0) {
+    PLOG(ERROR) << "failed to bind JDWP control socket";
+    return;
+  }
+
+  if (listen(s.get(), 4) < 0) {
+    PLOG(ERROR) << "failed to listen on JDWP control socket";
+    return;
+  }
+
+  std::vector<unique_fd> pending_connections;
+
+  unique_fd epfd(epoll_create1(EPOLL_CLOEXEC));
+  std::array<epoll_event, 16> events;
+
+  events[0].events = EPOLLIN;
+  events[0].data.fd = -1;
+  if (epoll_ctl(epfd.get(), EPOLL_CTL_ADD, s.get(), &events[0]) != 0) {
+    LOG(FATAL) << "failed to register event with epoll fd";
+  }
+
+  while (true) {
+    int epoll_rc = TEMP_FAILURE_RETRY(epoll_wait(epfd.get(), events.data(), events.size(), -1));
+    if (epoll_rc == -1) {
+      PLOG(FATAL) << "epoll_wait failed";
+    }
+
+    for (int i = 0; i < epoll_rc; ++i) {
+      const epoll_event& event = events[i];
+      if (event.data.fd == -1) {
+        unique_fd client(
+            TEMP_FAILURE_RETRY(accept4(s.get(), nullptr, nullptr, SOCK_NONBLOCK | SOCK_CLOEXEC)));
+
+        if (client == -1) {
+          PLOG(WARNING) << "failed to accept client on JDWP control socket";
+          continue;
+        }
+
+        epoll_event register_event;
+        register_event.events = EPOLLIN;
+        register_event.data.fd = client.get();
+
+        if (epoll_ctl(epfd.get(), EPOLL_CTL_ADD, client.get(), &register_event) != 0) {
+          PLOG(FATAL) << "failed to register JDWP client with epoll";
+        }
+
+        pending_connections.emplace_back(std::move(client));
+      } else {
+        // n^2, but the backlog should be short.
+        auto it = std::find_if(pending_connections.begin(), pending_connections.end(),
+                               [&](const unique_fd& fd) { return fd.get() == event.data.fd; });
+
+        if (it == pending_connections.end()) {
+          LOG(FATAL) << "failed to find JDWP client (" << event.data.fd
+                     << ") in pending connections";
+        }
+
+        // Massively oversized buffer: we're expecting an int32_t from the other end.
+        char buf[32];
+        int rc = TEMP_FAILURE_RETRY(recv(it->get(), buf, sizeof(buf), MSG_DONTWAIT));
+        if (rc != 4) {
+          LOG(ERROR) << "received data of incorrect size from JDWP client: read " << rc
+                     << ", expected 4";
+        } else {
+          int32_t pid;
+          memcpy(&pid, buf, sizeof(pid));
+          callback(it->release(), static_cast<pid_t>(pid));
+        }
+
+        if (epoll_ctl(epfd.get(), EPOLL_CTL_DEL, event.data.fd, nullptr) != 0) {
+          LOG(FATAL) << "failed to delete fd from JDWP epoll fd";
+        }
+
+        pending_connections.erase(it);
+      }
+    }
+  }
+}
diff --git a/adb/adbconnection/include/adbconnection/client.h b/adb/adbconnection/include/adbconnection/client.h
new file mode 100644
index 0000000..692fea0
--- /dev/null
+++ b/adb/adbconnection/include/adbconnection/client.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <android-base/unique_fd.h>
+
+extern "C" {
+
+struct AdbConnectionClientContext;
+
+enum AdbConnectionClientInfoType {
+  pid,
+  debuggable,
+};
+
+struct AdbConnectionClientInfo {
+  AdbConnectionClientInfoType type;
+  union {
+    uint64_t pid;
+    bool debuggable;
+  } data;
+};
+
+// Construct a context and connect to adbd.
+// Returns null if we fail to connect to adbd.
+AdbConnectionClientContext* adbconnection_client_new(
+    const AdbConnectionClientInfo* const* info_elems, size_t info_count);
+
+void adbconnection_client_destroy(AdbConnectionClientContext* ctx);
+
+// Get an fd which can be polled upon to detect when a jdwp socket is available.
+// You do not own this fd. Do not close it.
+int adbconnection_client_pollfd(AdbConnectionClientContext* ctx);
+
+// Receive a jdwp client fd.
+// Ownership is transferred to the caller of this function.
+int adbconnection_client_receive_jdwp_fd(AdbConnectionClientContext* ctx);
+}
diff --git a/adb/daemon/set_verity_enable_state_service.h b/adb/adbconnection/include/adbconnection/server.h
similarity index 74%
rename from adb/daemon/set_verity_enable_state_service.h
rename to adb/adbconnection/include/adbconnection/server.h
index c0ed98e..57ca6cd 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/adb/adbconnection/include/adbconnection/server.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,11 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <sys/types.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#include <android-base/unique_fd.h>
+
+extern "C" {
+
+void adbconnection_listen(void (*callback)(int fd, pid_t pid));
+}
diff --git a/libmeminfo/vts/Android.mk b/adb/adbconnection/libadbconnection_client.map.txt
similarity index 66%
rename from libmeminfo/vts/Android.mk
rename to adb/adbconnection/libadbconnection_client.map.txt
index 62d68d9..153a0e4 100644
--- a/libmeminfo/vts/Android.mk
+++ b/adb/adbconnection/libadbconnection_client.map.txt
@@ -7,16 +7,19 @@
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
-# Unless required by applicable law or agreed to in writing, software
+#  Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 
-LOCAL_PATH := $(call my-dir)
-
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := VtsKernelMemInfoTest
--include test/vts/tools/build/Android.host_config.mk
+LIBADBCONNECTION_CLIENT_1 {
+  global:
+    adbconnection_client_new;
+    adbconnection_client_destroy;
+    adbconnection_client_pollfd;
+    adbconnection_client_receive_jdwp_fd;
+  local:
+    *;
+};
diff --git a/adb/apex/Android.bp b/adb/apex/Android.bp
new file mode 100644
index 0000000..a6b1e78
--- /dev/null
+++ b/adb/apex/Android.bp
@@ -0,0 +1,55 @@
+apex_defaults {
+    name: "com.android.adbd-defaults",
+
+    binaries: ["adbd"],
+    compile_multilib: "both",
+    multilib: {
+        both: {
+            native_shared_libs: ["libadbconnection_client"],
+        },
+    },
+    prebuilts: ["com.android.adbd.init.rc", "com.android.adbd.ld.config.txt"],
+
+    key: "com.android.adbd.key",
+    certificate: ":com.android.adbd.certificate",
+}
+
+apex {
+    name: "com.android.adbd",
+    defaults: ["com.android.adbd-defaults"],
+    manifest: "apex_manifest.json",
+}
+
+// adbd apex with INT_MAX version code, to allow for upgrade/rollback testing.
+apex_test {
+    name: "test_com.android.adbd",
+    defaults: ["com.android.adbd-defaults"],
+    manifest: "test_apex_manifest.json",
+    file_contexts: ":com.android.adbd-file_contexts",
+    installable: false,
+}
+
+prebuilt_etc {
+    name: "com.android.adbd.ld.config.txt",
+    src: "ld.config.txt",
+    filename: "ld.config.txt",
+    installable: false,
+}
+
+prebuilt_etc {
+    name: "com.android.adbd.init.rc",
+    src: "adbd.rc",
+    filename: "init.rc",
+    installable: false,
+}
+
+apex_key {
+    name: "com.android.adbd.key",
+    public_key: "com.android.adbd.avbpubkey",
+    private_key: "com.android.adbd.pem",
+}
+
+android_app_certificate {
+    name: "com.android.adbd.certificate",
+    certificate: "com.android.adbd",
+}
diff --git a/adb/apex/adbd.rc b/adb/apex/adbd.rc
new file mode 100644
index 0000000..9cb072b
--- /dev/null
+++ b/adb/apex/adbd.rc
@@ -0,0 +1,6 @@
+service adbd /apex/com.android.adbd/bin/adbd --root_seclabel=u:r:su:s0
+    class core
+    socket adbd seqpacket 660 system system
+    disabled
+    override
+    seclabel u:r:adbd:s0
diff --git a/adb/apex/apex_manifest.json b/adb/apex/apex_manifest.json
new file mode 100644
index 0000000..ff2df12
--- /dev/null
+++ b/adb/apex/apex_manifest.json
@@ -0,0 +1,4 @@
+{
+  "name": "com.android.adbd",
+  "version": 1
+}
diff --git a/adb/apex/com.android.adbd.avbpubkey b/adb/apex/com.android.adbd.avbpubkey
new file mode 100644
index 0000000..06235bd
--- /dev/null
+++ b/adb/apex/com.android.adbd.avbpubkey
Binary files differ
diff --git a/adb/apex/com.android.adbd.pem b/adb/apex/com.android.adbd.pem
new file mode 100644
index 0000000..2c9a860
--- /dev/null
+++ b/adb/apex/com.android.adbd.pem
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIJKQIBAAKCAgEAwUmO4l/ZdLhmBcBtpwDjih6z6bC7iZDPAVgnFVnYuYDRlVDA
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+sspOUbOLfBOwxdCCc9JUxz5KggKWcDcTqX25M0mv09rpuCxIEg8lez1Ax0if
+-----END RSA PRIVATE KEY-----
diff --git a/adb/apex/com.android.adbd.pk8 b/adb/apex/com.android.adbd.pk8
new file mode 100644
index 0000000..cdddc3f
--- /dev/null
+++ b/adb/apex/com.android.adbd.pk8
Binary files differ
diff --git a/adb/apex/com.android.adbd.x509.pem b/adb/apex/com.android.adbd.x509.pem
new file mode 100644
index 0000000..bb85c1d
--- /dev/null
+++ b/adb/apex/com.android.adbd.x509.pem
@@ -0,0 +1,35 @@
+-----BEGIN CERTIFICATE-----
+MIIGHzCCBAegAwIBAgIUW8npFHXBP+wsEAesGMBxaV7TScAwDQYJKoZIhvcNAQEL
+BQAwgZ0xCzAJBgNVBAYTAlVTMRMwEQYDVQQIDApDYWxpZm9ybmlhMRYwFAYDVQQH
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+-----END CERTIFICATE-----
diff --git a/adb/apex/ld.config.txt b/adb/apex/ld.config.txt
new file mode 100644
index 0000000..ca297fe
--- /dev/null
+++ b/adb/apex/ld.config.txt
@@ -0,0 +1,53 @@
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Bionic loader config file for the adbd APEX.
+
+dir.adbd = /apex/com.android.adbd/bin/
+
+[adbd]
+additional.namespaces = apex,platform,art
+
+namespace.default.isolated = true
+namespace.default.permitted.paths = /system/${LIB}
+namespace.default.asan.permitted.paths = /system/${LIB}
+namespace.default.links = apex,art,platform
+namespace.default.link.apex.shared_libs = libcrypto.so
+namespace.default.link.art.shared_libs = libadbconnection_server.so
+
+# libcrypto.so in the APEX might be a symlink to /system, for APEXes bundled with the system image.
+# The dynamic linker works off of realpath, so we need to permit loading libcrypto.so from /system.
+namespace.default.link.platform.shared_libs = libc.so:libdl.so:libm.so:libclang_rt.hwasan-aarch64-android.so:liblog.so:libadbd_auth.so:libcrypto.so
+
+namespace.apex.isolated = true
+namespace.apex.search.paths = /apex/com.android.adbd/${LIB}
+namespace.apex.asan.search.paths = /apex/com.android.adbd/${LIB}
+namespace.apex.links = platform
+namespace.apex.link.platform.allow_all_shared_libs = true
+
+###############################################################################
+# "art" APEX namespace: used for libadbdconnection_server
+###############################################################################
+namespace.art.isolated = true
+namespace.art.search.paths = /apex/com.android.art/${LIB}
+namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
+namespace.art.links = platform
+namespace.art.link.platform.allow_all_shared_libs = true
+
+###############################################################################
+# "platform" namespace: used for NDK libraries, and libadbd_auth
+###############################################################################
+namespace.platform.isolated = true
+namespace.platform.search.paths = /system/${LIB}
+namespace.platform.asan.search.paths = /data/asan/system/${LIB}
+
+# /system/lib/libc.so, etc are symlinks to
+# /apex/com.android.runtime/lib/bionic/libc.so, etc. Add the path to the
+# permitted paths because linker uses realpath(3) to check the accessibility
+# of the lib. We could add this to search.paths instead but that makes the
+# resolution of bionic libs be dependent on the order of /system/lib and
+# /apex/.../lib/bionic in search.paths. If the latter is after the former,
+# then the latter is never tried because libc.so is always found in
+# /system/lib but fails to pass the accessibility test because of its realpath.
+# It's better to not depend on the ordering if possible.
+namespace.platform.permitted.paths = /apex/com.android.runtime/${LIB}/bionic
+namespace.platform.asan.permitted.paths = /apex/com.android.runtime/${LIB}/bionic
diff --git a/adb/apex/test_apex_manifest.json b/adb/apex/test_apex_manifest.json
new file mode 100644
index 0000000..7131977
--- /dev/null
+++ b/adb/apex/test_apex_manifest.json
@@ -0,0 +1,4 @@
+{
+  "name": "com.android.adbd",
+  "version": 2147483647
+}
diff --git a/adb/client/adb_client.cpp b/adb/client/adb_client.cpp
index d91ae35..f724cb5 100644
--- a/adb/client/adb_client.cpp
+++ b/adb/client/adb_client.cpp
@@ -222,7 +222,7 @@
     int port;
     std::string error;
     if (!parse_tcp_socket_spec(__adb_server_socket_spec, nullptr, &port, nullptr, &error)) {
-        LOG(FATAL) << "failed to parse server socket spec: " << error;
+        return {};
     }
 
     return adb_get_android_dir_path() + OS_PATH_SEPARATOR + "adb." + std::to_string(port);
diff --git a/adb/client/adb_install.cpp b/adb/client/adb_install.cpp
index 73dcde1..2bcd0a6 100644
--- a/adb/client/adb_install.cpp
+++ b/adb/client/adb_install.cpp
@@ -227,16 +227,20 @@
         return 1;
     }
 
-    copy_to_file(local_fd.get(), remote_fd.get());
+    if (!copy_to_file(local_fd.get(), remote_fd.get())) {
+        fprintf(stderr, "adb: failed to install: copy_to_file: %s: %s", file, strerror(errno));
+        return 1;
+    }
 
     char buf[BUFSIZ];
     read_status_line(remote_fd.get(), buf, sizeof(buf));
-    if (!strncmp("Success", buf, 7)) {
-        fputs(buf, stdout);
-        return 0;
+    if (strncmp("Success", buf, 7) != 0) {
+        fprintf(stderr, "adb: failed to install %s: %s", file, buf);
+        return 1;
     }
-    fprintf(stderr, "adb: failed to install %s: %s", file, buf);
-    return 1;
+
+    fputs(buf, stdout);
+    return 0;
 }
 
 static int install_app_legacy(int argc, const char** argv, bool use_fastdeploy) {
@@ -455,7 +459,12 @@
             goto finalize_session;
         }
 
-        copy_to_file(local_fd.get(), remote_fd.get());
+        if (!copy_to_file(local_fd.get(), remote_fd.get())) {
+            fprintf(stderr, "adb: failed to write \"%s\": %s\n", file, strerror(errno));
+            success = false;
+            goto finalize_session;
+        }
+
         read_status_line(remote_fd.get(), buf, sizeof(buf));
 
         if (strncmp("Success", buf, 7)) {
@@ -634,7 +643,11 @@
                 goto finalize_multi_package_session;
             }
 
-            copy_to_file(local_fd.get(), remote_fd.get());
+            if (!copy_to_file(local_fd.get(), remote_fd.get())) {
+                fprintf(stderr, "adb: failed to write %s: %s\n", split.c_str(), strerror(errno));
+                goto finalize_multi_package_session;
+            }
+
             read_status_line(remote_fd.get(), buf, sizeof(buf));
 
             if (strncmp("Success", buf, 7)) {
diff --git a/adb/client/commandline.cpp b/adb/client/commandline.cpp
index 0ffdbc2..c302965 100644
--- a/adb/client/commandline.cpp
+++ b/adb/client/commandline.cpp
@@ -107,6 +107,7 @@
         "       localfilesystem:<unix domain socket name>\n"
         "       dev:<character device name>\n"
         "       jdwp:<process pid> (remote only)\n"
+        "       acceptfd:<fd> (listen only)\n"
         " forward --remove LOCAL   remove specific forward socket connection\n"
         " forward --remove-all     remove all forward socket connections\n"
         " ppp TTY [PARAMETER...]   run PPP over USB\n"
@@ -136,8 +137,8 @@
         "     run remote shell command (interactive shell if no command given)\n"
         "     -e: choose escape character, or \"none\"; default '~'\n"
         "     -n: don't read from stdin\n"
-        "     -T: disable PTY allocation\n"
-        "     -t: force PTY allocation\n"
+        "     -T: disable pty allocation\n"
+        "     -t: allocate a pty if on a tty (-tt: force pty allocation)\n"
         "     -x: disable remote exit codes and stdout/stderr separation\n"
         " emu COMMAND              run emulator console command\n"
         "\n"
@@ -351,7 +352,8 @@
 #endif
 }
 
-void copy_to_file(int inFd, int outFd) {
+bool copy_to_file(int inFd, int outFd) {
+    bool result = true;
     std::vector<char> buf(64 * 1024);
     int len;
     long total = 0;
@@ -374,6 +376,7 @@
         }
         if (len < 0) {
             D("copy_to_file(): read failed: %s", strerror(errno));
+            result = false;
             break;
         }
         if (outFd == STDOUT_FILENO) {
@@ -387,7 +390,8 @@
 
     stdinout_raw_epilogue(inFd, outFd, old_stdin_mode, old_stdout_mode);
 
-    D("copy_to_file() finished after %lu bytes", total);
+    D("copy_to_file() finished with %s after %lu bytes", result ? "success" : "failure", total);
+    return result;
 }
 
 static void send_window_size_change(int fd, std::unique_ptr<ShellProtocol>& shell) {
@@ -789,6 +793,15 @@
                        service_string);
 }
 
+static int adb_shell_noinput(int argc, const char** argv) {
+#if !defined(_WIN32)
+    unique_fd fd(adb_open("/dev/null", O_RDONLY));
+    CHECK_NE(STDIN_FILENO, fd.get());
+    dup2(fd.get(), STDIN_FILENO);
+#endif
+    return adb_shell(argc, argv);
+}
+
 static int adb_sideload_legacy(const char* filename, int in_fd, int size) {
     std::string error;
     unique_fd out_fd(adb_connect(android::base::StringPrintf("sideload:%d", size), &error));
@@ -1115,8 +1128,8 @@
         return false;
     }
 
+    fwrite(buf, 1, sizeof(buf) - bytes_left, stdout);
     fflush(stdout);
-    WriteFdExactly(STDOUT_FILENO, buf, sizeof(buf) - bytes_left);
     if (cur != buf && strstr(buf, "restarting") == nullptr) {
         return true;
     }
@@ -1611,7 +1624,7 @@
         return adb_query_command(query);
     }
     else if (!strcmp(argv[0], "connect")) {
-        if (argc != 2) error_exit("usage: adb connect HOST[:PORT>]");
+        if (argc != 2) error_exit("usage: adb connect HOST[:PORT]");
 
         std::string query = android::base::StringPrintf("host:connect:%s", argv[1]);
         return adb_query_command(query);
@@ -1710,7 +1723,7 @@
         if (CanUseFeature(features, kFeatureRemountShell)) {
             std::vector<const char*> args = {"shell"};
             args.insert(args.cend(), argv, argv + argc);
-            return adb_shell(args.size(), args.data());
+            return adb_shell_noinput(args.size(), args.data());
         } else if (argc > 1) {
             auto command = android::base::StringPrintf("%s:%s", argv[0], argv[1]);
             return adb_connect_command(command);
diff --git a/adb/client/commandline.h b/adb/client/commandline.h
index ab77b29..b9dee56 100644
--- a/adb/client/commandline.h
+++ b/adb/client/commandline.h
@@ -100,7 +100,7 @@
 
 int adb_commandline(int argc, const char** argv);
 
-void copy_to_file(int inFd, int outFd);
+bool copy_to_file(int inFd, int outFd);
 
 // Connects to the device "shell" service with |command| and prints the
 // resulting output.
diff --git a/adb/client/fastdeploy.cpp b/adb/client/fastdeploy.cpp
index bdc9e56..5fa0edb 100644
--- a/adb/client/fastdeploy.cpp
+++ b/adb/client/fastdeploy.cpp
@@ -101,17 +101,12 @@
 
 static void push_to_device(const void* data, size_t byte_count, const char* dst, bool sync) {
     std::vector<const char*> srcs;
-    {
-        TemporaryFile temp;
-        android::base::WriteFully(temp.fd, data, byte_count);
-        srcs.push_back(temp.path);
-
-        // On Windows, the file needs to be flushed before pushing to device.
-        // closing the file flushes its content, but we still need to remove it after push.
-        // FileDeleter does exactly that.
-        temp.DoNotRemove();
-    }
-    FileDeleter temp_deleter(srcs.back());
+    TemporaryFile tf;
+    android::base::WriteFully(tf.fd, data, byte_count);
+    srcs.push_back(tf.path);
+    // On Windows, the file needs to be flushed before pushing to device,
+    // but can't be removed until after the push.
+    unix_close(tf.release());
 
     if (!do_sync_push(srcs, dst, sync)) {
         error_exit("Failed to push fastdeploy agent to device.");
diff --git a/adb/client/file_sync_client.cpp b/adb/client/file_sync_client.cpp
index 703eb2f..922f2ba 100644
--- a/adb/client/file_sync_client.cpp
+++ b/adb/client/file_sync_client.cpp
@@ -52,6 +52,8 @@
 #include <android-base/strings.h>
 #include <android-base/stringprintf.h>
 
+typedef void(sync_ls_cb)(unsigned mode, uint64_t size, uint64_t time, const char* name);
+
 struct syncsendbuf {
     unsigned id;
     unsigned size;
@@ -185,14 +187,13 @@
         const char* direction_str = (direction == TransferDirection::push) ? "pushed" : "pulled";
         std::stringstream ss;
         if (!name.empty()) {
-            ss << name << ": ";
+            std::string_view display_name(name);
+            char* out = getenv("ANDROID_PRODUCT_OUT");
+            if (out) android::base::ConsumePrefix(&display_name, out);
+            ss << display_name << ": ";
         }
         ss << files_transferred << " file" << ((files_transferred == 1) ? "" : "s") << " "
-           << direction_str << ".";
-        if (files_skipped > 0) {
-            ss << " " << files_skipped << " file" << ((files_skipped == 1) ? "" : "s")
-               << " skipped.";
-        }
+           << direction_str << ", " << files_skipped << " skipped.";
         ss << TransferRate();
 
         lp.Print(ss.str(), LinePrinter::LineType::INFO);
@@ -210,6 +211,7 @@
             Error("failed to get feature set: %s", error.c_str());
         } else {
             have_stat_v2_ = CanUseFeature(features_, kFeatureStat2);
+            have_ls_v2_ = CanUseFeature(features_, kFeatureLs2);
             fd.reset(adb_connect("sync:", &error));
             if (fd < 0) {
                 Error("connect failed: %s", error.c_str());
@@ -357,7 +359,7 @@
                             << msg.stat_v1.id;
             }
 
-            if (msg.stat_v1.mode == 0 && msg.stat_v1.size == 0 && msg.stat_v1.time == 0) {
+            if (msg.stat_v1.mode == 0 && msg.stat_v1.size == 0 && msg.stat_v1.mtime == 0) {
                 // There's no way for us to know what the error was.
                 errno = ENOPROTOOPT;
                 return false;
@@ -365,13 +367,52 @@
 
             st->st_mode = msg.stat_v1.mode;
             st->st_size = msg.stat_v1.size;
-            st->st_ctime = msg.stat_v1.time;
-            st->st_mtime = msg.stat_v1.time;
+            st->st_ctime = msg.stat_v1.mtime;
+            st->st_mtime = msg.stat_v1.mtime;
         }
 
         return true;
     }
 
+    bool SendLs(const char* path) {
+        return SendRequest(have_ls_v2_ ? ID_LIST_V2 : ID_LIST_V1, path);
+    }
+
+  private:
+    template <bool v2>
+    static bool FinishLsImpl(borrowed_fd fd, const std::function<sync_ls_cb>& callback) {
+        using dent_type =
+                std::conditional_t<v2, decltype(syncmsg::dent_v2), decltype(syncmsg::dent_v1)>;
+
+        while (true) {
+            dent_type dent;
+            if (!ReadFdExactly(fd, &dent, sizeof(dent))) return false;
+
+            uint32_t expected_id = v2 ? ID_DENT_V2 : ID_DENT_V1;
+            if (dent.id == ID_DONE) return true;
+            if (dent.id != expected_id) return false;
+
+            // Maximum length of a file name excluding null terminator (NAME_MAX) on Linux is 255.
+            char buf[256];
+            size_t len = dent.namelen;
+            if (len > 255) return false;
+
+            if (!ReadFdExactly(fd, buf, len)) return false;
+            buf[len] = 0;
+
+            callback(dent.mode, dent.size, dent.mtime, buf);
+        }
+    }
+
+  public:
+    bool FinishLs(const std::function<sync_ls_cb>& callback) {
+        if (have_ls_v2_) {
+            return FinishLsImpl<true>(this->fd, callback);
+        } else {
+            return FinishLsImpl<false>(this->fd, callback);
+        }
+    }
+
     // Sending header, payload, and footer in a single write makes a huge
     // difference to "adb sync" performance.
     bool SendSmallFile(const char* path_and_mode,
@@ -578,6 +619,7 @@
     bool expect_done_;
     FeatureSet features_;
     bool have_stat_v2_;
+    bool have_ls_v2_;
 
     TransferLedger global_ledger_;
     TransferLedger current_ledger_;
@@ -609,28 +651,9 @@
     }
 };
 
-typedef void (sync_ls_cb)(unsigned mode, unsigned size, unsigned time, const char* name);
-
 static bool sync_ls(SyncConnection& sc, const char* path,
                     const std::function<sync_ls_cb>& func) {
-    if (!sc.SendRequest(ID_LIST, path)) return false;
-
-    while (true) {
-        syncmsg msg;
-        if (!ReadFdExactly(sc.fd, &msg.dent, sizeof(msg.dent))) return false;
-
-        if (msg.dent.id == ID_DONE) return true;
-        if (msg.dent.id != ID_DENT) return false;
-
-        size_t len = msg.dent.namelen;
-        if (len > 256) return false; // TODO: resize buffer? continue?
-
-        char buf[257];
-        if (!ReadFdExactly(sc.fd, buf, len)) return false;
-        buf[len] = 0;
-
-        func(msg.dent.mode, msg.dent.size, msg.dent.time, buf);
-    }
+    return sc.SendLs(path) && sc.FinishLs(func);
 }
 
 static bool sync_stat(SyncConnection& sc, const char* path, struct stat* st) {
@@ -787,9 +810,8 @@
     SyncConnection sc;
     if (!sc.IsValid()) return false;
 
-    return sync_ls(sc, path, [](unsigned mode, unsigned size, unsigned time,
-                                const char* name) {
-        printf("%08x %08x %08x %s\n", mode, size, time, name);
+    return sync_ls(sc, path, [](unsigned mode, uint64_t size, uint64_t time, const char* name) {
+        printf("%08x %08" PRIx64 " %08" PRIx64 " %s\n", mode, size, time, name);
     });
 }
 
@@ -1062,7 +1084,7 @@
     file_list->push_back(ci);
 
     // Put the files/dirs in rpath on the lists.
-    auto callback = [&](unsigned mode, unsigned size, unsigned time, const char* name) {
+    auto callback = [&](unsigned mode, uint64_t size, uint64_t time, const char* name) {
         if (IsDotOrDotDot(name)) {
             return;
         }
diff --git a/adb/client/main.cpp b/adb/client/main.cpp
index 0c5c28f..e5ffe4c 100644
--- a/adb/client/main.cpp
+++ b/adb/client/main.cpp
@@ -129,7 +129,7 @@
     }
 
     if (!getenv("ADB_EMU") || strcmp(getenv("ADB_EMU"), "0") != 0) {
-        local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
+        local_init(android::base::StringPrintf("tcp:%d", DEFAULT_ADB_LOCAL_TRANSPORT_PORT));
     }
 
     std::string error;
diff --git a/adb/client/usb_linux.cpp b/adb/client/usb_linux.cpp
index 24e722e..343e7b5 100644
--- a/adb/client/usb_linux.cpp
+++ b/adb/client/usb_linux.cpp
@@ -609,6 +609,7 @@
     while (true) {
         // TODO: Use inotify.
         find_usb_device("/dev/bus/usb", register_device);
+        adb_notify_device_scan_complete();
         kick_disconnected_devices();
         std::this_thread::sleep_for(1s);
     }
diff --git a/adb/client/usb_osx.cpp b/adb/client/usb_osx.cpp
index 5c0da47..7207ca7 100644
--- a/adb/client/usb_osx.cpp
+++ b/adb/client/usb_osx.cpp
@@ -461,6 +461,7 @@
             std::this_thread::sleep_for(100ms);
         }
 
+        adb_notify_device_scan_complete();
         initialized = true;
     }
 }
diff --git a/adb/client/usb_windows.cpp b/adb/client/usb_windows.cpp
index f23c3a5..197c6fa 100644
--- a/adb/client/usb_windows.cpp
+++ b/adb/client/usb_windows.cpp
@@ -172,6 +172,7 @@
 
     while (true) {
         find_devices();
+        adb_notify_device_scan_complete();
         std::this_thread::sleep_for(1s);
     }
 }
diff --git a/adb/daemon/auth.cpp b/adb/daemon/auth.cpp
index 7a3a4f5..ec4ab4a 100644
--- a/adb/daemon/auth.cpp
+++ b/adb/daemon/auth.cpp
@@ -16,107 +16,116 @@
 
 #define TRACE_TAG AUTH
 
-#include "adb.h"
-#include "adb_auth.h"
-#include "adb_io.h"
-#include "fdevent/fdevent.h"
 #include "sysdeps.h"
-#include "transport.h"
 
 #include <resolv.h>
 #include <stdio.h>
 #include <string.h>
-#include <iomanip>
 
 #include <algorithm>
+#include <iomanip>
+#include <map>
 #include <memory>
 
+#include <adbd_auth.h>
 #include <android-base/file.h>
+#include <android-base/no_destructor.h>
 #include <android-base/strings.h>
 #include <crypto_utils/android_pubkey.h>
 #include <openssl/obj_mac.h>
 #include <openssl/rsa.h>
 #include <openssl/sha.h>
 
-static fdevent* listener_fde = nullptr;
-static fdevent* framework_fde = nullptr;
-static auto& framework_mutex = *new std::mutex();
-static int framework_fd GUARDED_BY(framework_mutex) = -1;
-static auto& connected_keys GUARDED_BY(framework_mutex) = *new std::vector<std::string>;
+#include "adb.h"
+#include "adb_auth.h"
+#include "adb_io.h"
+#include "fdevent/fdevent.h"
+#include "transport.h"
+#include "types.h"
+
+static AdbdAuthContext* auth_ctx;
 
 static void adb_disconnected(void* unused, atransport* t);
 static struct adisconnect adb_disconnect = {adb_disconnected, nullptr};
-static atransport* adb_transport;
-static bool needs_retry = false;
+
+static android::base::NoDestructor<std::map<uint32_t, weak_ptr<atransport>>> transports;
+static uint32_t transport_auth_id = 0;
 
 bool auth_required = true;
 
-bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig,
-                      std::string* auth_key) {
-    static constexpr const char* key_paths[] = { "/adb_keys", "/data/misc/adb/adb_keys", nullptr };
-
-    for (const auto& path : key_paths) {
-        if (access(path, R_OK) == 0) {
-            LOG(INFO) << "Loading keys from " << path;
-            std::string content;
-            if (!android::base::ReadFileToString(path, &content)) {
-                PLOG(ERROR) << "Couldn't read " << path;
-                continue;
-            }
-
-            for (const auto& line : android::base::Split(content, "\n")) {
-                if (line.empty()) continue;
-                *auth_key = line;
-                // TODO: do we really have to support both ' ' and '\t'?
-                char* sep = strpbrk(const_cast<char*>(line.c_str()), " \t");
-                if (sep) *sep = '\0';
-
-                // b64_pton requires one additional byte in the target buffer for
-                // decoding to succeed. See http://b/28035006 for details.
-                uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1];
-                if (b64_pton(line.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) {
-                    LOG(ERROR) << "Invalid base64 key " << line.c_str() << " in " << path;
-                    continue;
-                }
-
-                RSA* key = nullptr;
-                if (!android_pubkey_decode(keybuf, ANDROID_PUBKEY_ENCODED_SIZE, &key)) {
-                    LOG(ERROR) << "Failed to parse key " << line.c_str() << " in " << path;
-                    continue;
-                }
-
-                bool verified =
-                    (RSA_verify(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
-                                reinterpret_cast<const uint8_t*>(sig.c_str()), sig.size(),
-                                key) == 1);
-                RSA_free(key);
-                if (verified) return true;
-            }
-        }
-    }
-    auth_key->clear();
-    return false;
+static void* transport_to_callback_arg(atransport* transport) {
+    uint32_t id = transport_auth_id++;
+    (*transports)[id] = transport->weak();
+    return reinterpret_cast<void*>(id);
 }
 
-static bool adbd_send_key_message_locked(std::string_view msg_type, std::string_view key)
-        REQUIRES(framework_mutex) {
-    if (framework_fd < 0) {
-        LOG(ERROR) << "Client not connected to send msg_type " << msg_type;
-        return false;
-    }
-    std::string msg = std::string(msg_type) + std::string(key);
-    int msg_len = msg.length();
-    if (msg_len >= static_cast<int>(MAX_FRAMEWORK_PAYLOAD)) {
-        LOG(ERROR) << "Key too long (" << msg_len << ")";
-        return false;
+static atransport* transport_from_callback_arg(void* id) {
+    uint64_t id_u64 = reinterpret_cast<uint64_t>(id);
+    if (id_u64 > std::numeric_limits<uint32_t>::max()) {
+        LOG(FATAL) << "transport_from_callback_arg called on out of range value: " << id_u64;
     }
 
-    LOG(DEBUG) << "Sending '" << msg << "'";
-    if (!WriteFdExactly(framework_fd, msg.c_str(), msg_len)) {
-        PLOG(ERROR) << "Failed to write " << msg_type;
-        return false;
+    uint32_t id_u32 = static_cast<uint32_t>(id_u64);
+    auto it = transports->find(id_u32);
+    if (it == transports->end()) {
+        LOG(ERROR) << "transport_from_callback_arg failed to find transport for id " << id_u32;
+        return nullptr;
     }
-    return true;
+
+    atransport* t = it->second.get();
+    if (!t) {
+        LOG(WARNING) << "transport_from_callback_arg found already destructed transport";
+        return nullptr;
+    }
+
+    transports->erase(it);
+    return t;
+}
+
+static void IteratePublicKeys(std::function<bool(std::string_view public_key)> f) {
+    adbd_auth_get_public_keys(
+            auth_ctx,
+            [](const char* public_key, size_t len, void* arg) {
+                return (*static_cast<decltype(f)*>(arg))(std::string_view(public_key, len));
+            },
+            &f);
+}
+
+bool adbd_auth_verify(const char* token, size_t token_size, const std::string& sig,
+                      std::string* auth_key) {
+    bool authorized = false;
+    auth_key->clear();
+
+    IteratePublicKeys([&](std::string_view public_key) {
+        // TODO: do we really have to support both ' ' and '\t'?
+        std::vector<std::string> split = android::base::Split(std::string(public_key), " \t");
+        uint8_t keybuf[ANDROID_PUBKEY_ENCODED_SIZE + 1];
+        const std::string& pubkey = split[0];
+        if (b64_pton(pubkey.c_str(), keybuf, sizeof(keybuf)) != ANDROID_PUBKEY_ENCODED_SIZE) {
+            LOG(ERROR) << "Invalid base64 key " << pubkey;
+            return true;
+        }
+
+        RSA* key = nullptr;
+        if (!android_pubkey_decode(keybuf, ANDROID_PUBKEY_ENCODED_SIZE, &key)) {
+            LOG(ERROR) << "Failed to parse key " << pubkey;
+            return true;
+        }
+
+        bool verified =
+                (RSA_verify(NID_sha1, reinterpret_cast<const uint8_t*>(token), token_size,
+                            reinterpret_cast<const uint8_t*>(sig.c_str()), sig.size(), key) == 1);
+        RSA_free(key);
+        if (verified) {
+            *auth_key = public_key;
+            authorized = true;
+            return false;
+        }
+
+        return true;
+    });
+
+    return authorized;
 }
 
 static bool adbd_auth_generate_token(void* token, size_t token_size) {
@@ -127,113 +136,6 @@
     return okay;
 }
 
-static void adb_disconnected(void* unused, atransport* t) {
-    LOG(INFO) << "ADB disconnect";
-    adb_transport = nullptr;
-    needs_retry = false;
-    {
-        std::lock_guard<std::mutex> lock(framework_mutex);
-        if (framework_fd >= 0) {
-            adbd_send_key_message_locked("DC", t->auth_key);
-        }
-        connected_keys.erase(std::remove(connected_keys.begin(), connected_keys.end(), t->auth_key),
-                             connected_keys.end());
-    }
-}
-
-static void framework_disconnected() {
-    LOG(INFO) << "Framework disconnect";
-    if (framework_fde) {
-        fdevent_destroy(framework_fde);
-        {
-            std::lock_guard<std::mutex> lock(framework_mutex);
-            framework_fd = -1;
-        }
-    }
-}
-
-static void adbd_auth_event(int fd, unsigned events, void*) {
-    if (events & FDE_READ) {
-        char response[2];
-        int ret = unix_read(fd, response, sizeof(response));
-        if (ret <= 0) {
-            framework_disconnected();
-        } else if (ret == 2 && response[0] == 'O' && response[1] == 'K') {
-            if (adb_transport) {
-                adbd_auth_verified(adb_transport);
-            }
-        }
-    }
-}
-
-void adbd_auth_confirm_key(atransport* t) {
-    if (!adb_transport) {
-        adb_transport = t;
-        t->AddDisconnect(&adb_disconnect);
-    }
-
-    {
-        std::lock_guard<std::mutex> lock(framework_mutex);
-        if (framework_fd < 0) {
-            LOG(ERROR) << "Client not connected";
-            needs_retry = true;
-            return;
-        }
-
-        adbd_send_key_message_locked("PK", t->auth_key);
-    }
-}
-
-static void adbd_auth_listener(int fd, unsigned events, void* data) {
-    int s = adb_socket_accept(fd, nullptr, nullptr);
-    if (s < 0) {
-        PLOG(ERROR) << "Failed to accept";
-        return;
-    }
-
-    {
-        std::lock_guard<std::mutex> lock(framework_mutex);
-        if (framework_fd >= 0) {
-            LOG(WARNING) << "adb received framework auth socket connection again";
-            framework_disconnected();
-        }
-
-        framework_fd = s;
-        framework_fde = fdevent_create(framework_fd, adbd_auth_event, nullptr);
-        fdevent_add(framework_fde, FDE_READ);
-
-        if (needs_retry) {
-            needs_retry = false;
-            send_auth_request(adb_transport);
-        }
-
-        // if a client connected before the framework was available notify the framework of the
-        // connected key now.
-        if (!connected_keys.empty()) {
-            for (const auto& key : connected_keys) {
-                adbd_send_key_message_locked("CK", key);
-            }
-        }
-    }
-}
-
-void adbd_notify_framework_connected_key(atransport* t) {
-    if (!adb_transport) {
-        adb_transport = t;
-        t->AddDisconnect(&adb_disconnect);
-    }
-    {
-        std::lock_guard<std::mutex> lock(framework_mutex);
-        if (std::find(connected_keys.begin(), connected_keys.end(), t->auth_key) ==
-            connected_keys.end()) {
-            connected_keys.push_back(t->auth_key);
-        }
-        if (framework_fd >= 0) {
-            adbd_send_key_message_locked("CK", t->auth_key);
-        }
-    }
-}
-
 void adbd_cloexec_auth_socket() {
     int fd = android_get_control_socket("adbd");
     if (fd == -1) {
@@ -243,20 +145,30 @@
     fcntl(fd, F_SETFD, FD_CLOEXEC);
 }
 
+static void adbd_auth_key_authorized(void* arg, uint64_t id) {
+    LOG(INFO) << "adb client authorized";
+    fdevent_run_on_main_thread([=]() {
+        LOG(INFO) << "arg = " << reinterpret_cast<uintptr_t>(arg);
+        auto* transport = transport_from_callback_arg(arg);
+        if (!transport) {
+            LOG(ERROR) << "authorization received for deleted transport, ignoring";
+            return;
+        }
+        transport->auth_id = id;
+        adbd_auth_verified(transport);
+    });
+}
+
 void adbd_auth_init(void) {
-    int fd = android_get_control_socket("adbd");
-    if (fd == -1) {
-        PLOG(ERROR) << "Failed to get adbd socket";
-        return;
-    }
-
-    if (listen(fd, 4) == -1) {
-        PLOG(ERROR) << "Failed to listen on '" << fd << "'";
-        return;
-    }
-
-    listener_fde = fdevent_create(fd, adbd_auth_listener, nullptr);
-    fdevent_add(listener_fde, FDE_READ);
+    AdbdAuthCallbacks cb;
+    cb.version = 1;
+    cb.callbacks.v1.key_authorized = adbd_auth_key_authorized;
+    auth_ctx = adbd_auth_new(&cb);
+    std::thread([]() {
+        adb_thread_setname("adbd auth");
+        adbd_auth_run(auth_ctx);
+        LOG(FATAL) << "auth thread terminated";
+    }).detach();
 }
 
 void send_auth_request(atransport* t) {
@@ -280,3 +192,19 @@
     handle_online(t);
     send_connect(t);
 }
+
+static void adb_disconnected(void* unused, atransport* t) {
+    LOG(INFO) << "ADB disconnect";
+    adbd_auth_notify_disconnect(auth_ctx, t->auth_id);
+}
+
+void adbd_auth_confirm_key(atransport* t) {
+    LOG(INFO) << "prompting user to authorize key";
+    t->AddDisconnect(&adb_disconnect);
+    adbd_auth_prompt_user(auth_ctx, t->auth_key.data(), t->auth_key.size(),
+                          transport_to_callback_arg(t));
+}
+
+void adbd_notify_framework_connected_key(atransport* t) {
+    adbd_auth_notify_auth(auth_ctx, t->auth_key.data(), t->auth_key.size());
+}
diff --git a/adb/daemon/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
index 0e70d47..d6af708 100644
--- a/adb/daemon/file_sync_service.cpp
+++ b/adb/daemon/file_sync_service.cpp
@@ -139,7 +139,7 @@
     lstat(path, &st);
     msg.stat_v1.mode = st.st_mode;
     msg.stat_v1.size = st.st_size;
-    msg.stat_v1.time = st.st_mtime;
+    msg.stat_v1.mtime = st.st_mtime;
     return WriteFdExactly(s, &msg.stat_v1, sizeof(msg.stat_v1));
 }
 
@@ -174,40 +174,73 @@
     return WriteFdExactly(s, &msg.stat_v2, sizeof(msg.stat_v2));
 }
 
+template <bool v2>
 static bool do_list(int s, const char* path) {
     dirent* de;
 
-    syncmsg msg;
-    msg.dent.id = ID_DENT;
+    using MessageType =
+            std::conditional_t<v2, decltype(syncmsg::dent_v2), decltype(syncmsg::dent_v1)>;
+    MessageType msg;
+    uint32_t msg_id;
+    if constexpr (v2) {
+        msg_id = ID_DENT_V2;
+    } else {
+        msg_id = ID_DENT_V1;
+    }
 
     std::unique_ptr<DIR, int(*)(DIR*)> d(opendir(path), closedir);
     if (!d) goto done;
 
     while ((de = readdir(d.get()))) {
+        memset(&msg, 0, sizeof(msg));
+        msg.id = msg_id;
+
         std::string filename(StringPrintf("%s/%s", path, de->d_name));
 
         struct stat st;
         if (lstat(filename.c_str(), &st) == 0) {
-            size_t d_name_length = strlen(de->d_name);
-            msg.dent.mode = st.st_mode;
-            msg.dent.size = st.st_size;
-            msg.dent.time = st.st_mtime;
-            msg.dent.namelen = d_name_length;
+            msg.mode = st.st_mode;
+            msg.size = st.st_size;
+            msg.mtime = st.st_mtime;
 
-            if (!WriteFdExactly(s, &msg.dent, sizeof(msg.dent)) ||
-                    !WriteFdExactly(s, de->d_name, d_name_length)) {
-                return false;
+            if constexpr (v2) {
+                msg.dev = st.st_dev;
+                msg.ino = st.st_ino;
+                msg.nlink = st.st_nlink;
+                msg.uid = st.st_uid;
+                msg.gid = st.st_gid;
+                msg.atime = st.st_atime;
+                msg.ctime = st.st_ctime;
             }
+        } else {
+            if constexpr (v2) {
+                msg.error = errno;
+            } else {
+                continue;
+            }
+        }
+
+        size_t d_name_length = strlen(de->d_name);
+        msg.namelen = d_name_length;
+
+        if (!WriteFdExactly(s, &msg, sizeof(msg)) ||
+            !WriteFdExactly(s, de->d_name, d_name_length)) {
+            return false;
         }
     }
 
 done:
-    msg.dent.id = ID_DONE;
-    msg.dent.mode = 0;
-    msg.dent.size = 0;
-    msg.dent.time = 0;
-    msg.dent.namelen = 0;
-    return WriteFdExactly(s, &msg.dent, sizeof(msg.dent));
+    memset(&msg, 0, sizeof(msg));
+    msg.id = ID_DONE;
+    return WriteFdExactly(s, &msg, sizeof(msg));
+}
+
+static bool do_list_v1(int s, const char* path) {
+    return do_list<false>(s, path);
+}
+
+static bool do_list_v2(int s, const char* path) {
+    return do_list<true>(s, path);
 }
 
 // Make sure that SendFail from adb_io.cpp isn't accidentally used in this file.
@@ -499,8 +532,10 @@
       return "lstat_v2";
     case ID_STAT_V2:
       return "stat_v2";
-    case ID_LIST:
-      return "list";
+    case ID_LIST_V1:
+      return "list_v1";
+    case ID_LIST_V2:
+      return "list_v2";
     case ID_SEND:
       return "send";
     case ID_RECV:
@@ -546,8 +581,11 @@
         case ID_STAT_V2:
             if (!do_stat_v2(fd, request.id, name)) return false;
             break;
-        case ID_LIST:
-            if (!do_list(fd, name)) return false;
+        case ID_LIST_V1:
+            if (!do_list_v1(fd, name)) return false;
+            break;
+        case ID_LIST_V2:
+            if (!do_list_v2(fd, name)) return false;
             break;
         case ID_SEND:
             if (!do_send(fd, name, buffer)) return false;
diff --git a/adb/daemon/main.cpp b/adb/daemon/main.cpp
index 9ebab74..3322574 100644
--- a/adb/daemon/main.cpp
+++ b/adb/daemon/main.cpp
@@ -32,11 +32,13 @@
 #include <sys/prctl.h>
 
 #include <memory>
+#include <vector>
 
 #include <android-base/logging.h>
 #include <android-base/macros.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
+#include <android-base/strings.h>
 
 #if defined(__ANDROID__)
 #include <libminijail.h>
@@ -51,6 +53,7 @@
 #include "adb_auth.h"
 #include "adb_listeners.h"
 #include "adb_utils.h"
+#include "socket_spec.h"
 #include "transport.h"
 
 #include "mdns.h"
@@ -179,12 +182,26 @@
 }
 #endif
 
-static void setup_port(int port) {
-    LOG(INFO) << "adbd listening on port " << port;
-    local_init(port);
+static void setup_adb(const std::vector<std::string>& addrs) {
 #if defined(__ANDROID__)
+    // Get the first valid port from addrs and setup mDNS.
+    int port = -1;
+    std::string error;
+    for (const auto& addr : addrs) {
+        port = get_host_socket_spec_port(addr, &error);
+        if (port != -1) {
+            break;
+        }
+    }
+    if (port == -1) {
+        port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
+    }
     setup_mdns(port);
 #endif
+    for (const auto& addr : addrs) {
+        LOG(INFO) << "adbd listening on " << addr;
+        local_init(addr);
+    }
 }
 
 int adbd_main(int server_port) {
@@ -205,7 +222,11 @@
     // descriptor will always be open.
     adbd_cloexec_auth_socket();
 
-#if defined(ALLOW_ADBD_NO_AUTH)
+#if defined(__ANDROID_RECOVERY__)
+    if (is_device_unlocked() || __android_log_is_debuggable()) {
+        auth_required = false;
+    }
+#elif defined(ALLOW_ADBD_NO_AUTH)
     // If ro.adb.secure is unset, default to no authentication required.
     auth_required = android::base::GetBoolProperty("ro.adb.secure", false);
 #elif defined(__ANDROID__)
@@ -214,8 +235,6 @@
     }
 #endif
 
-    adbd_auth_init();
-
     // Our external storage path may be different than apps, since
     // we aren't able to bind mount after dropping root.
     const char* adb_external_storage = getenv("ADB_EXTERNAL_STORAGE");
@@ -230,6 +249,9 @@
     drop_privileges(server_port);
 #endif
 
+    // adbd_auth_init will spawn a thread, so we need to defer it until after selinux transitions.
+    adbd_auth_init();
+
     bool is_usb = false;
 
 #if defined(__ANDROID__)
@@ -243,25 +265,38 @@
     // If one of these properties is set, also listen on that port.
     // If one of the properties isn't set and we couldn't listen on usb, listen
     // on the default port.
-    std::string prop_port = android::base::GetProperty("service.adb.tcp.port", "");
-    if (prop_port.empty()) {
-        prop_port = android::base::GetProperty("persist.adb.tcp.port", "");
-    }
+    std::vector<std::string> addrs;
+    std::string prop_addr = android::base::GetProperty("service.adb.listen_addrs", "");
+    if (prop_addr.empty()) {
+        std::string prop_port = android::base::GetProperty("service.adb.tcp.port", "");
+        if (prop_port.empty()) {
+            prop_port = android::base::GetProperty("persist.adb.tcp.port", "");
+        }
 
 #if !defined(__ANDROID__)
-    if (prop_port.empty() && getenv("ADBD_PORT")) {
-        prop_port = getenv("ADBD_PORT");
-    }
+        if (prop_port.empty() && getenv("ADBD_PORT")) {
+            prop_port = getenv("ADBD_PORT");
+        }
 #endif
 
-    int port;
-    if (sscanf(prop_port.c_str(), "%d", &port) == 1 && port > 0) {
-        D("using port=%d", port);
-        // Listen on TCP port specified by service.adb.tcp.port property.
-        setup_port(port);
-    } else if (!is_usb) {
-        // Listen on default port.
-        setup_port(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
+        int port;
+        if (sscanf(prop_port.c_str(), "%d", &port) == 1 && port > 0) {
+            D("using tcp port=%d", port);
+            // Listen on TCP and VSOCK port specified by service.adb.tcp.port property.
+            addrs.push_back(android::base::StringPrintf("tcp:%d", port));
+            addrs.push_back(android::base::StringPrintf("vsock:%d", port));
+            setup_adb(addrs);
+        } else if (!is_usb) {
+            // Listen on default port.
+            addrs.push_back(
+                    android::base::StringPrintf("tcp:%d", DEFAULT_ADB_LOCAL_TRANSPORT_PORT));
+            addrs.push_back(
+                    android::base::StringPrintf("vsock:%d", DEFAULT_ADB_LOCAL_TRANSPORT_PORT));
+            setup_adb(addrs);
+        }
+    } else {
+        addrs = android::base::Split(prop_addr, ",");
+        setup_adb(addrs);
     }
 
     D("adbd_main(): pre init_jdwp()");
diff --git a/adb/daemon/reboot_service.cpp b/adb/daemon/reboot_service.cpp
deleted file mode 100644
index 13398af..0000000
--- a/adb/daemon/reboot_service.cpp
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define TRACE_TAG SERVICES
-
-#include "sysdeps.h"
-
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <unistd.h>
-
-#include <string>
-
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <bootloader_message/bootloader_message.h>
-#include <cutils/android_reboot.h>
-
-#include "adb_io.h"
-#include "adb_unique_fd.h"
-
-void reboot_service(unique_fd fd, const std::string& arg) {
-    std::string reboot_arg = arg;
-    sync();
-
-    if (reboot_arg.empty()) reboot_arg = "adb";
-    std::string reboot_string = android::base::StringPrintf("reboot,%s", reboot_arg.c_str());
-
-    if (reboot_arg == "fastboot" &&
-        android::base::GetBoolProperty("ro.boot.dynamic_partitions", false) &&
-        access("/dev/socket/recovery", F_OK) == 0) {
-        LOG(INFO) << "Recovery specific reboot fastboot";
-        /*
-         * The socket is created to allow switching between recovery and
-         * fastboot.
-         */
-        android::base::unique_fd sock(socket(AF_UNIX, SOCK_STREAM, 0));
-        if (sock < 0) {
-            WriteFdFmt(fd, "reboot (%s) create\n", strerror(errno));
-            PLOG(ERROR) << "Creating recovery socket failed";
-            return;
-        }
-
-        sockaddr_un addr = {.sun_family = AF_UNIX};
-        strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1);
-        if (connect(sock.get(), reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1) {
-            WriteFdFmt(fd, "reboot (%s) connect\n", strerror(errno));
-            PLOG(ERROR) << "Couldn't connect to recovery socket";
-            return;
-        }
-        const char msg_switch_to_fastboot = 'f';
-        auto ret = adb_write(sock, &msg_switch_to_fastboot, sizeof(msg_switch_to_fastboot));
-        if (ret != sizeof(msg_switch_to_fastboot)) {
-            WriteFdFmt(fd, "reboot (%s) write\n", strerror(errno));
-            PLOG(ERROR) << "Couldn't write message to recovery socket to switch to fastboot";
-            return;
-        }
-    } else {
-        if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
-            WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
-            return;
-        }
-    }
-    // Don't return early. Give the reboot command time to take effect
-    // to avoid messing up scripts which do "adb reboot && adb wait-for-device"
-    while (true) {
-        pause();
-    }
-}
diff --git a/adb/daemon/services.cpp b/adb/daemon/services.cpp
index 181a8c5..4ec90d2 100644
--- a/adb/daemon/services.cpp
+++ b/adb/daemon/services.cpp
@@ -39,6 +39,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <cutils/android_reboot.h>
 #include <cutils/sockets.h>
 #include <log/log_properties.h>
 
@@ -53,9 +54,7 @@
 
 #include "daemon/file_sync_service.h"
 #include "daemon/framebuffer_service.h"
-#include "daemon/reboot_service.h"
 #include "daemon/restart_service.h"
-#include "daemon/set_verity_enable_state_service.h"
 #include "daemon/shell_service.h"
 
 
@@ -142,6 +141,26 @@
     WriteFdExactly(fd.get(), "spinning\n");
 }
 
+[[maybe_unused]] static unique_fd reboot_device(const std::string& name) {
+#if defined(__ANDROID_RECOVERY__)
+    if (!__android_log_is_debuggable()) {
+        auto reboot_service = [name](unique_fd fd) {
+            std::string reboot_string = android::base::StringPrintf("reboot,%s", name.c_str());
+            if (!android::base::SetProperty(ANDROID_RB_PROPERTY, reboot_string)) {
+                WriteFdFmt(fd.get(), "reboot (%s) failed\n", reboot_string.c_str());
+                return;
+            }
+            while (true) pause();
+        };
+        return create_service_thread("reboot", reboot_service);
+    }
+#endif
+    // Fall through
+    std::string cmd = "/system/bin/reboot ";
+    cmd += name;
+    return StartSubprocess(cmd, nullptr, SubprocessType::kRaw, SubprocessProtocol::kNone);
+}
+
 struct ServiceSocket : public asocket {
     ServiceSocket() {
         install_local_socket(this);
@@ -254,9 +273,7 @@
         cmd += name;
         return StartSubprocess(cmd, nullptr, SubprocessType::kRaw, SubprocessProtocol::kNone);
     } else if (android::base::ConsumePrefix(&name, "reboot:")) {
-        std::string arg(name);
-        return create_service_thread("reboot",
-                                     std::bind(reboot_service, std::placeholders::_1, arg));
+        return reboot_device(std::string(name));
     } else if (name.starts_with("root:")) {
         return create_service_thread("root", restart_root_service);
     } else if (name.starts_with("unroot:")) {
@@ -269,11 +286,11 @@
         return StartSubprocess("/system/bin/bu restore", nullptr, SubprocessType::kRaw,
                                SubprocessProtocol::kNone);
     } else if (name.starts_with("disable-verity:")) {
-        return create_service_thread("verity-on", std::bind(set_verity_enabled_state_service,
-                                                            std::placeholders::_1, false));
+        return StartSubprocess("/system/bin/disable-verity", nullptr, SubprocessType::kRaw,
+                               SubprocessProtocol::kNone);
     } else if (name.starts_with("enable-verity:")) {
-        return create_service_thread("verity-off", std::bind(set_verity_enabled_state_service,
-                                                             std::placeholders::_1, true));
+        return StartSubprocess("/system/bin/enable-verity", nullptr, SubprocessType::kRaw,
+                               SubprocessProtocol::kNone);
     } else if (android::base::ConsumePrefix(&name, "tcpip:")) {
         std::string str(name);
 
diff --git a/adb/daemon/set_verity_enable_state_service.cpp b/adb/daemon/set_verity_enable_state_service.cpp
deleted file mode 100644
index 4fbccdb..0000000
--- a/adb/daemon/set_verity_enable_state_service.cpp
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define TRACE_TAG ADB
-
-#include "set_verity_enable_state_service.h"
-#include "sysdeps.h"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <libavb_user/libavb_user.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <fs_mgr.h>
-#include <fs_mgr_overlayfs.h>
-#include <fstab/fstab.h>
-#include <log/log_properties.h>
-
-#include "adb.h"
-#include "adb_io.h"
-#include "adb_unique_fd.h"
-
-#include "fec/io.h"
-
-#ifdef ALLOW_ADBD_DISABLE_VERITY
-static const bool kAllowDisableVerity = true;
-#else
-static const bool kAllowDisableVerity = false;
-#endif
-
-void suggest_run_adb_root(int fd) {
-    if (getuid() != 0) WriteFdExactly(fd, "Maybe run adb root?\n");
-}
-
-static bool make_block_device_writable(const std::string& dev) {
-    unique_fd fd(unix_open(dev, O_RDONLY | O_CLOEXEC));
-    if (fd == -1) {
-        return false;
-    }
-
-    int OFF = 0;
-    bool result = (ioctl(fd.get(), BLKROSET, &OFF) != -1);
-    return result;
-}
-
-/* Turn verity on/off */
-static bool set_verity_enabled_state(int fd, const char* block_device, const char* mount_point,
-                                     bool enable) {
-    if (!make_block_device_writable(block_device)) {
-        WriteFdFmt(fd, "Could not make block device %s writable (%s).\n",
-                   block_device, strerror(errno));
-        return false;
-    }
-
-    fec::io fh(block_device, O_RDWR);
-
-    if (!fh) {
-        WriteFdFmt(fd, "Could not open block device %s (%s).\n", block_device, strerror(errno));
-        suggest_run_adb_root(fd);
-        return false;
-    }
-
-    fec_verity_metadata metadata;
-
-    if (!fh.get_verity_metadata(metadata)) {
-        WriteFdExactly(fd, "Couldn't find verity metadata!\n");
-        return false;
-    }
-
-    if (!enable && metadata.disabled) {
-        WriteFdFmt(fd, "Verity already disabled on %s\n", mount_point);
-        return false;
-    }
-
-    if (enable && !metadata.disabled) {
-        WriteFdFmt(fd, "Verity already enabled on %s\n", mount_point);
-        return false;
-    }
-
-    if (!fh.set_verity_status(enable)) {
-        WriteFdFmt(fd, "Could not set verity %s flag on device %s with error %s\n",
-                   enable ? "enabled" : "disabled",
-                   block_device, strerror(errno));
-        return false;
-    }
-
-    auto change = false;
-    errno = 0;
-    if (enable ? fs_mgr_overlayfs_teardown(mount_point, &change)
-               : fs_mgr_overlayfs_setup(nullptr, mount_point, &change)) {
-        if (change) {
-            WriteFdFmt(fd, "%s overlayfs for %s\n", enable ? "disabling" : "using", mount_point);
-        }
-    } else if (errno) {
-        int expected_errno = enable ? EBUSY : ENOENT;
-        if (errno != expected_errno) {
-            WriteFdFmt(fd, "Overlayfs %s for %s failed with error %s\n",
-                       enable ? "teardown" : "setup", mount_point, strerror(errno));
-        }
-    }
-    WriteFdFmt(fd, "Verity %s on %s\n", enable ? "enabled" : "disabled", mount_point);
-    return true;
-}
-
-/* Helper function to get A/B suffix, if any. If the device isn't
- * using A/B the empty string is returned. Otherwise either "_a",
- * "_b", ... is returned.
- */
-static std::string get_ab_suffix() {
-    return android::base::GetProperty("ro.boot.slot_suffix", "");
-}
-
-static bool is_avb_device_locked() {
-    return android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked";
-}
-
-static bool overlayfs_setup(int fd, bool enable) {
-    auto change = false;
-    errno = 0;
-    if (enable ? fs_mgr_overlayfs_teardown(nullptr, &change)
-               : fs_mgr_overlayfs_setup(nullptr, nullptr, &change)) {
-        if (change) {
-            WriteFdFmt(fd, "%s overlayfs\n", enable ? "disabling" : "using");
-        }
-    } else if (errno) {
-        WriteFdFmt(fd, "Overlayfs %s failed with error %s\n", enable ? "teardown" : "setup",
-                   strerror(errno));
-        suggest_run_adb_root(fd);
-    }
-    return change;
-}
-
-/* Use AVB to turn verity on/off */
-static bool set_avb_verity_enabled_state(int fd, AvbOps* ops, bool enable_verity) {
-    std::string ab_suffix = get_ab_suffix();
-    bool verity_enabled;
-
-    if (is_avb_device_locked()) {
-        WriteFdExactly(fd, "Device is locked. Please unlock the device first\n");
-        return false;
-    }
-
-    if (!avb_user_verity_get(ops, ab_suffix.c_str(), &verity_enabled)) {
-        WriteFdExactly(fd, "Error getting verity state. Try adb root first?\n");
-        return false;
-    }
-
-    if ((verity_enabled && enable_verity) || (!verity_enabled && !enable_verity)) {
-        WriteFdFmt(fd, "verity is already %s\n", verity_enabled ? "enabled" : "disabled");
-        return false;
-    }
-
-    if (!avb_user_verity_set(ops, ab_suffix.c_str(), enable_verity)) {
-        WriteFdExactly(fd, "Error setting verity\n");
-        return false;
-    }
-
-    overlayfs_setup(fd, enable_verity);
-    WriteFdFmt(fd, "Successfully %s verity\n", enable_verity ? "enabled" : "disabled");
-    return true;
-}
-
-void set_verity_enabled_state_service(unique_fd fd, bool enable) {
-    bool any_changed = false;
-
-    // Figure out if we're using VB1.0 or VB2.0 (aka AVB) - by
-    // contract, androidboot.vbmeta.digest is set by the bootloader
-    // when using AVB).
-    bool using_avb = !android::base::GetProperty("ro.boot.vbmeta.digest", "").empty();
-
-    // If using AVB, dm-verity is used on any build so we want it to
-    // be possible to disable/enable on any build (except USER). For
-    // VB1.0 dm-verity is only enabled on certain builds.
-    if (!using_avb) {
-        if (!kAllowDisableVerity) {
-            WriteFdFmt(fd.get(), "%s-verity only works for userdebug builds\n",
-                       enable ? "enable" : "disable");
-        }
-
-        if (!android::base::GetBoolProperty("ro.secure", false)) {
-            overlayfs_setup(fd.get(), enable);
-            WriteFdExactly(fd.get(), "verity not enabled - ENG build\n");
-            return;
-        }
-    }
-
-    // Should never be possible to disable dm-verity on a USER build
-    // regardless of using AVB or VB1.0.
-    if (!__android_log_is_debuggable()) {
-        WriteFdExactly(fd.get(), "verity cannot be disabled/enabled - USER build\n");
-        return;
-    }
-
-    if (using_avb) {
-        // Yep, the system is using AVB.
-        AvbOps* ops = avb_ops_user_new();
-        if (ops == nullptr) {
-            WriteFdExactly(fd.get(), "Error getting AVB ops\n");
-            return;
-        }
-        if (set_avb_verity_enabled_state(fd.get(), ops, enable)) {
-            any_changed = true;
-        }
-        avb_ops_user_free(ops);
-    } else {
-        // Not using AVB - assume VB1.0.
-
-        // read all fstab entries at once from all sources
-        android::fs_mgr::Fstab fstab;
-        if (!android::fs_mgr::ReadDefaultFstab(&fstab)) {
-            WriteFdExactly(fd.get(), "Failed to read fstab\n");
-            suggest_run_adb_root(fd.get());
-            return;
-        }
-
-        // Loop through entries looking for ones that verity manages.
-        for (const auto& entry : fstab) {
-            if (entry.fs_mgr_flags.verify) {
-                if (set_verity_enabled_state(fd.get(), entry.blk_device.c_str(),
-                                             entry.mount_point.c_str(), enable)) {
-                    any_changed = true;
-                }
-            }
-        }
-    }
-    if (!any_changed) any_changed = overlayfs_setup(fd.get(), enable);
-
-    if (any_changed) {
-        WriteFdExactly(fd.get(), "Now reboot your device for settings to take effect\n");
-    }
-}
diff --git a/adb/daemon/shell_service.cpp b/adb/daemon/shell_service.cpp
index 0fb14c4..f62032d 100644
--- a/adb/daemon/shell_service.cpp
+++ b/adb/daemon/shell_service.cpp
@@ -85,7 +85,6 @@
 #include <paths.h>
 #include <pty.h>
 #include <pwd.h>
-#include <sys/select.h>
 #include <termios.h>
 
 #include <memory>
@@ -141,6 +140,20 @@
     return true;
 }
 
+struct SubprocessPollfds {
+    adb_pollfd pfds[3];
+
+    adb_pollfd* data() { return pfds; }
+    size_t size() { return 3; }
+
+    adb_pollfd* begin() { return pfds; }
+    adb_pollfd* end() { return pfds + size(); }
+
+    adb_pollfd& stdinout_pfd() { return pfds[0]; }
+    adb_pollfd& stderr_pfd() { return pfds[1]; }
+    adb_pollfd& protocol_pfd() { return pfds[2]; }
+};
+
 class Subprocess {
   public:
     Subprocess(std::string command, const char* terminal_type, SubprocessType type,
@@ -176,8 +189,7 @@
     void PassDataStreams();
     void WaitForExit();
 
-    unique_fd* SelectLoop(fd_set* master_read_set_ptr,
-                          fd_set* master_write_set_ptr);
+    unique_fd* PollLoop(SubprocessPollfds* pfds);
 
     // Input/output stream handlers. Success returns nullptr, failure returns
     // a pointer to the failed FD.
@@ -545,23 +557,23 @@
     }
 
     // Start by trying to read from the protocol FD, stdout, and stderr.
-    fd_set master_read_set, master_write_set;
-    FD_ZERO(&master_read_set);
-    FD_ZERO(&master_write_set);
-    for (unique_fd* sfd : {&protocol_sfd_, &stdinout_sfd_, &stderr_sfd_}) {
-        if (*sfd != -1) {
-            FD_SET(sfd->get(), &master_read_set);
-        }
-    }
+    SubprocessPollfds pfds;
+    pfds.stdinout_pfd() = {.fd = stdinout_sfd_.get(), .events = POLLIN};
+    pfds.stderr_pfd() = {.fd = stderr_sfd_.get(), .events = POLLIN};
+    pfds.protocol_pfd() = {.fd = protocol_sfd_.get(), .events = POLLIN};
 
     // Pass data until the protocol FD or both the subprocess pipes die, at
     // which point we can't pass any more data.
     while (protocol_sfd_ != -1 && (stdinout_sfd_ != -1 || stderr_sfd_ != -1)) {
-        unique_fd* dead_sfd = SelectLoop(&master_read_set, &master_write_set);
+        unique_fd* dead_sfd = PollLoop(&pfds);
         if (dead_sfd) {
             D("closing FD %d", dead_sfd->get());
-            FD_CLR(dead_sfd->get(), &master_read_set);
-            FD_CLR(dead_sfd->get(), &master_write_set);
+            auto it = std::find_if(pfds.begin(), pfds.end(), [=](const adb_pollfd& pfd) {
+                return pfd.fd == dead_sfd->get();
+            });
+            CHECK(it != pfds.end());
+            it->fd = -1;
+            it->events = 0;
             if (dead_sfd == &protocol_sfd_) {
                 // Using SIGHUP is a decent general way to indicate that the
                 // controlling process is going away. If specific signals are
@@ -583,30 +595,19 @@
     }
 }
 
-namespace {
-
-inline bool ValidAndInSet(const unique_fd& sfd, fd_set* set) {
-    return sfd != -1 && FD_ISSET(sfd.get(), set);
-}
-
-}   // namespace
-
-unique_fd* Subprocess::SelectLoop(fd_set* master_read_set_ptr,
-                                  fd_set* master_write_set_ptr) {
-    fd_set read_set, write_set;
-    int select_n =
-            std::max(std::max(protocol_sfd_.get(), stdinout_sfd_.get()), stderr_sfd_.get()) + 1;
+unique_fd* Subprocess::PollLoop(SubprocessPollfds* pfds) {
     unique_fd* dead_sfd = nullptr;
+    adb_pollfd& stdinout_pfd = pfds->stdinout_pfd();
+    adb_pollfd& stderr_pfd = pfds->stderr_pfd();
+    adb_pollfd& protocol_pfd = pfds->protocol_pfd();
 
-    // Keep calling select() and passing data until an FD closes/errors.
+    // Keep calling poll() and passing data until an FD closes/errors.
     while (!dead_sfd) {
-        memcpy(&read_set, master_read_set_ptr, sizeof(read_set));
-        memcpy(&write_set, master_write_set_ptr, sizeof(write_set));
-        if (select(select_n, &read_set, &write_set, nullptr, nullptr) < 0) {
+        if (adb_poll(pfds->data(), pfds->size(), -1) < 0) {
             if (errno == EINTR) {
                 continue;
             } else {
-                PLOG(ERROR) << "select failed, closing subprocess pipes";
+                PLOG(ERROR) << "poll failed, closing subprocess pipes";
                 stdinout_sfd_.reset(-1);
                 stderr_sfd_.reset(-1);
                 return nullptr;
@@ -614,34 +615,47 @@
         }
 
         // Read stdout, write to protocol FD.
-        if (ValidAndInSet(stdinout_sfd_, &read_set)) {
+        if (stdinout_pfd.fd != -1 && (stdinout_pfd.revents & POLLIN)) {
             dead_sfd = PassOutput(&stdinout_sfd_, ShellProtocol::kIdStdout);
         }
 
         // Read stderr, write to protocol FD.
-        if (!dead_sfd && ValidAndInSet(stderr_sfd_, &read_set)) {
+        if (!dead_sfd && stderr_pfd.fd != 1 && (stderr_pfd.revents & POLLIN)) {
             dead_sfd = PassOutput(&stderr_sfd_, ShellProtocol::kIdStderr);
         }
 
         // Read protocol FD, write to stdin.
-        if (!dead_sfd && ValidAndInSet(protocol_sfd_, &read_set)) {
+        if (!dead_sfd && protocol_pfd.fd != -1 && (protocol_pfd.revents & POLLIN)) {
             dead_sfd = PassInput();
             // If we didn't finish writing, block on stdin write.
             if (input_bytes_left_) {
-                FD_CLR(protocol_sfd_.get(), master_read_set_ptr);
-                FD_SET(stdinout_sfd_.get(), master_write_set_ptr);
+                protocol_pfd.events &= ~POLLIN;
+                stdinout_pfd.events |= POLLOUT;
             }
         }
 
         // Continue writing to stdin; only happens if a previous write blocked.
-        if (!dead_sfd && ValidAndInSet(stdinout_sfd_, &write_set)) {
+        if (!dead_sfd && stdinout_pfd.fd != -1 && (stdinout_pfd.revents & POLLOUT)) {
             dead_sfd = PassInput();
             // If we finished writing, go back to blocking on protocol read.
             if (!input_bytes_left_) {
-                FD_SET(protocol_sfd_.get(), master_read_set_ptr);
-                FD_CLR(stdinout_sfd_.get(), master_write_set_ptr);
+                protocol_pfd.events |= POLLIN;
+                stdinout_pfd.events &= ~POLLOUT;
             }
         }
+
+        // After handling all of the events we've received, check to see if any fds have died.
+        if (stdinout_pfd.revents & (POLLHUP | POLLRDHUP | POLLERR | POLLNVAL)) {
+            return &stdinout_sfd_;
+        }
+
+        if (stderr_pfd.revents & (POLLHUP | POLLRDHUP | POLLERR | POLLNVAL)) {
+            return &stderr_sfd_;
+        }
+
+        if (protocol_pfd.revents & (POLLHUP | POLLRDHUP | POLLERR | POLLNVAL)) {
+            return &protocol_sfd_;
+        }
     }  // while (!dead_sfd)
 
     return dead_sfd;
diff --git a/adb/daemon/transport_qemu.cpp b/adb/daemon/transport_qemu.cpp
index aa760bc..901efee 100644
--- a/adb/daemon/transport_qemu.cpp
+++ b/adb/daemon/transport_qemu.cpp
@@ -18,6 +18,7 @@
 #include <qemu_pipe.h>
 
 #define TRACE_TAG TRANSPORT
+#include "socket_spec.h"
 #include "sysdeps.h"
 #include "transport.h"
 
@@ -55,7 +56,7 @@
  *   the transport registration is completed. That's why we need to send the
  *   'start' request after the transport is registered.
  */
-void qemu_socket_thread(int port) {
+void qemu_socket_thread(std::string_view addr) {
     /* 'accept' request to the adb QEMUD service. */
     static const char _accept_req[] = "accept";
     /* 'start' request to the adb QEMUD service. */
@@ -69,6 +70,12 @@
     adb_thread_setname("qemu socket");
     D("transport: qemu_socket_thread() starting");
 
+    std::string error;
+    int port = get_host_socket_spec_port(addr, &error);
+    if (port == -1) {
+        port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
+    }
+
     /* adb QEMUD service connection request. */
     snprintf(con_name, sizeof(con_name), "pipe:qemud:adb:%d", port);
 
@@ -78,7 +85,7 @@
         /* This could be an older version of the emulator, that doesn't
          * implement adb QEMUD service. Fall back to the old TCP way. */
         D("adb service is not available. Falling back to TCP socket.");
-        std::thread(server_socket_thread, tcp_listen_inaddr_any, port).detach();
+        std::thread(server_socket_thread, adb_listen, addr).detach();
         return;
     }
 
diff --git a/adb/daemon/usb.cpp b/adb/daemon/usb.cpp
index 1abae87..a9ad805 100644
--- a/adb/daemon/usb.cpp
+++ b/adb/daemon/usb.cpp
@@ -117,14 +117,18 @@
     }
 };
 
+template <class Payload>
 struct IoBlock {
     bool pending = false;
     struct iocb control = {};
-    std::shared_ptr<Block> payload;
+    Payload payload;
 
     TransferId id() const { return TransferId::from_value(control.aio_data); }
 };
 
+using IoReadBlock = IoBlock<Block>;
+using IoWriteBlock = IoBlock<std::shared_ptr<Block>>;
+
 struct ScopedAioContext {
     ScopedAioContext() = default;
     ~ScopedAioContext() { reset(); }
@@ -208,16 +212,17 @@
 
     virtual bool Write(std::unique_ptr<apacket> packet) override final {
         LOG(DEBUG) << "USB write: " << dump_header(&packet->msg);
-        Block header(sizeof(packet->msg));
-        memcpy(header.data(), &packet->msg, sizeof(packet->msg));
+        auto header = std::make_shared<Block>(sizeof(packet->msg));
+        memcpy(header->data(), &packet->msg, sizeof(packet->msg));
 
         std::lock_guard<std::mutex> lock(write_mutex_);
-        write_requests_.push_back(CreateWriteBlock(std::move(header), next_write_id_++));
+        write_requests_.push_back(
+                CreateWriteBlock(std::move(header), 0, sizeof(packet->msg), next_write_id_++));
         if (!packet->payload.empty()) {
             // The kernel attempts to allocate a contiguous block of memory for each write,
             // which can fail if the write is large and the kernel heap is fragmented.
             // Split large writes into smaller chunks to avoid this.
-            std::shared_ptr<Block> payload = std::make_shared<Block>(std::move(packet->payload));
+            auto payload = std::make_shared<Block>(std::move(packet->payload));
             size_t offset = 0;
             size_t len = payload->size();
 
@@ -464,16 +469,20 @@
         worker_thread_.join();
     }
 
-    void PrepareReadBlock(IoBlock* block, uint64_t id) {
+    void PrepareReadBlock(IoReadBlock* block, uint64_t id) {
         block->pending = false;
-        block->payload = std::make_shared<Block>(kUsbReadSize);
+        if (block->payload.capacity() >= kUsbReadSize) {
+            block->payload.resize(kUsbReadSize);
+        } else {
+            block->payload = Block(kUsbReadSize);
+        }
         block->control.aio_data = static_cast<uint64_t>(TransferId::read(id));
-        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload->data());
-        block->control.aio_nbytes = block->payload->size();
+        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload.data());
+        block->control.aio_nbytes = block->payload.size();
     }
 
-    IoBlock CreateReadBlock(uint64_t id) {
-        IoBlock block;
+    IoReadBlock CreateReadBlock(uint64_t id) {
+        IoReadBlock block;
         PrepareReadBlock(&block, id);
         block.control.aio_rw_flags = 0;
         block.control.aio_lio_opcode = IOCB_CMD_PREAD;
@@ -518,9 +527,9 @@
 
     void HandleRead(TransferId id, int64_t size) {
         uint64_t read_idx = id.id % kUsbReadQueueDepth;
-        IoBlock* block = &read_requests_[read_idx];
+        IoReadBlock* block = &read_requests_[read_idx];
         block->pending = false;
-        block->payload->resize(size);
+        block->payload.resize(size);
 
         // Notification for completed reads can be received out of order.
         if (block->id().id != needed_read_id_) {
@@ -531,7 +540,7 @@
 
         for (uint64_t id = needed_read_id_;; ++id) {
             size_t read_idx = id % kUsbReadQueueDepth;
-            IoBlock* current_block = &read_requests_[read_idx];
+            IoReadBlock* current_block = &read_requests_[read_idx];
             if (current_block->pending) {
                 break;
             }
@@ -540,19 +549,19 @@
         }
     }
 
-    void ProcessRead(IoBlock* block) {
-        if (!block->payload->empty()) {
+    void ProcessRead(IoReadBlock* block) {
+        if (!block->payload.empty()) {
             if (!incoming_header_.has_value()) {
-                CHECK_EQ(sizeof(amessage), block->payload->size());
-                amessage msg;
-                memcpy(&msg, block->payload->data(), sizeof(amessage));
+                CHECK_EQ(sizeof(amessage), block->payload.size());
+                amessage& msg = incoming_header_.emplace();
+                memcpy(&msg, block->payload.data(), sizeof(msg));
                 LOG(DEBUG) << "USB read:" << dump_header(&msg);
                 incoming_header_ = msg;
             } else {
                 size_t bytes_left = incoming_header_->data_length - incoming_payload_.size();
-                Block payload = std::move(*block->payload);
+                Block payload = std::move(block->payload);
                 CHECK_LE(payload.size(), bytes_left);
-                incoming_payload_.append(std::make_unique<Block>(std::move(payload)));
+                incoming_payload_.append(std::move(payload));
             }
 
             if (incoming_header_->data_length == incoming_payload_.size()) {
@@ -560,11 +569,15 @@
                 packet->msg = *incoming_header_;
 
                 // TODO: Make apacket contain an IOVector so we don't have to coalesce.
-                packet->payload = incoming_payload_.coalesce();
+                packet->payload = std::move(incoming_payload_).coalesce();
                 read_callback_(this, std::move(packet));
 
                 incoming_header_.reset();
-                incoming_payload_.clear();
+                // reuse the capacity of the incoming payload while we can.
+                auto free_block = incoming_payload_.clear();
+                if (block->payload.capacity() == 0) {
+                    block->payload = std::move(free_block);
+                }
             }
         }
 
@@ -572,7 +585,7 @@
         SubmitRead(block);
     }
 
-    bool SubmitRead(IoBlock* block) {
+    bool SubmitRead(IoReadBlock* block) {
         block->pending = true;
         struct iocb* iocb = &block->control;
         if (io_submit(aio_context_.get(), 1, &iocb) != 1) {
@@ -594,7 +607,7 @@
         std::lock_guard<std::mutex> lock(write_mutex_);
         auto it =
                 std::find_if(write_requests_.begin(), write_requests_.end(), [id](const auto& req) {
-                    return static_cast<uint64_t>(req->id()) == static_cast<uint64_t>(id);
+                    return static_cast<uint64_t>(req.id()) == static_cast<uint64_t>(id);
                 });
         CHECK(it != write_requests_.end());
 
@@ -605,27 +618,26 @@
         SubmitWrites();
     }
 
-    std::unique_ptr<IoBlock> CreateWriteBlock(std::shared_ptr<Block> payload, size_t offset,
-                                              size_t len, uint64_t id) {
-        auto block = std::make_unique<IoBlock>();
-        block->payload = std::move(payload);
-        block->control.aio_data = static_cast<uint64_t>(TransferId::write(id));
-        block->control.aio_rw_flags = 0;
-        block->control.aio_lio_opcode = IOCB_CMD_PWRITE;
-        block->control.aio_reqprio = 0;
-        block->control.aio_fildes = write_fd_.get();
-        block->control.aio_buf = reinterpret_cast<uintptr_t>(block->payload->data() + offset);
-        block->control.aio_nbytes = len;
-        block->control.aio_offset = 0;
-        block->control.aio_flags = IOCB_FLAG_RESFD;
-        block->control.aio_resfd = worker_event_fd_.get();
+    IoWriteBlock CreateWriteBlock(std::shared_ptr<Block> payload, size_t offset, size_t len,
+                                  uint64_t id) {
+        auto block = IoWriteBlock();
+        block.payload = std::move(payload);
+        block.control.aio_data = static_cast<uint64_t>(TransferId::write(id));
+        block.control.aio_rw_flags = 0;
+        block.control.aio_lio_opcode = IOCB_CMD_PWRITE;
+        block.control.aio_reqprio = 0;
+        block.control.aio_fildes = write_fd_.get();
+        block.control.aio_buf = reinterpret_cast<uintptr_t>(block.payload->data() + offset);
+        block.control.aio_nbytes = len;
+        block.control.aio_offset = 0;
+        block.control.aio_flags = IOCB_FLAG_RESFD;
+        block.control.aio_resfd = worker_event_fd_.get();
         return block;
     }
 
-    std::unique_ptr<IoBlock> CreateWriteBlock(Block payload, uint64_t id) {
-        std::shared_ptr<Block> block = std::make_shared<Block>(std::move(payload));
-        size_t len = block->size();
-        return CreateWriteBlock(std::move(block), 0, len, id);
+    IoWriteBlock CreateWriteBlock(Block&& payload, uint64_t id) {
+        size_t len = payload.size();
+        return CreateWriteBlock(std::make_shared<Block>(std::move(payload)), 0, len, id);
     }
 
     void SubmitWrites() REQUIRES(write_mutex_) {
@@ -642,9 +654,9 @@
 
         struct iocb* iocbs[kUsbWriteQueueDepth];
         for (int i = 0; i < writes_to_submit; ++i) {
-            CHECK(!write_requests_[writes_submitted_ + i]->pending);
-            write_requests_[writes_submitted_ + i]->pending = true;
-            iocbs[i] = &write_requests_[writes_submitted_ + i]->control;
+            CHECK(!write_requests_[writes_submitted_ + i].pending);
+            write_requests_[writes_submitted_ + i].pending = true;
+            iocbs[i] = &write_requests_[writes_submitted_ + i].control;
             LOG(VERBOSE) << "submitting write_request " << static_cast<void*>(iocbs[i]);
         }
 
@@ -689,7 +701,7 @@
     std::optional<amessage> incoming_header_;
     IOVector incoming_payload_;
 
-    std::array<IoBlock, kUsbReadQueueDepth> read_requests_;
+    std::array<IoReadBlock, kUsbReadQueueDepth> read_requests_;
     IOVector read_data_;
 
     // ID of the next request that we're going to send out.
@@ -699,7 +711,7 @@
     size_t needed_read_id_ = 0;
 
     std::mutex write_mutex_;
-    std::deque<std::unique_ptr<IoBlock>> write_requests_ GUARDED_BY(write_mutex_);
+    std::deque<IoWriteBlock> write_requests_ GUARDED_BY(write_mutex_);
     size_t next_write_id_ GUARDED_BY(write_mutex_) = 0;
     size_t writes_submitted_ GUARDED_BY(write_mutex_) = 0;
 
diff --git a/adb/daemon/usb_ffs.cpp b/adb/daemon/usb_ffs.cpp
index 338d776..b19fa5d 100644
--- a/adb/daemon/usb_ffs.cpp
+++ b/adb/daemon/usb_ffs.cpp
@@ -84,7 +84,7 @@
 using usb_os_desc_guid_t = usb_os_desc_ext_prop<20, 39>;
 usb_os_desc_guid_t os_desc_guid = {
     .bPropertyName = "DeviceInterfaceGUID",
-    .bProperty = "{64379D6C-D531-4BED-BBEC-5A16FC07D6BC}",
+    .bProperty = "{F72FE0D4-CBCB-407D-8814-9ED673D0DD6B}",
 };
 
 struct usb_ext_prop_values {
diff --git a/adb/fastdeploy/Android.bp b/adb/fastdeploy/Android.bp
index 245d52a..f5893aa 100644
--- a/adb/fastdeploy/Android.bp
+++ b/adb/fastdeploy/Android.bp
@@ -27,6 +27,7 @@
 
 java_binary {
     name: "deployagent",
+    sdk_version: "24",
     static_libs: [
         "deployagent_lib",
     ],
diff --git a/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java
index ef6ccae..4aa2f79 100644
--- a/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java
+++ b/adb/fastdeploy/deployagent/test/com/android/fastdeploy/FastDeployTest.java
@@ -20,7 +20,9 @@
 import static org.junit.Assert.assertTrue;
 
 import com.android.compatibility.common.tradefed.build.CompatibilityBuildHelper;
+import com.android.ddmlib.Log.LogLevel;
 import com.android.tradefed.device.DeviceNotAvailableException;
+import com.android.tradefed.log.LogUtil.CLog;
 import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
 import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
 
@@ -68,17 +70,19 @@
     }
 
     private boolean isAppInstalled(String packageName) throws DeviceNotAvailableException {
-        final String commandResult = getDevice().executeShellCommand("pm list packages");
+        final String result = getDevice().executeShellCommand("pm list packages");
+        CLog.logAndDisplay(LogLevel.INFO, result);
         final int prefixLength = "package:".length();
-        return Arrays.stream(commandResult.split("\\r?\\n"))
+        return Arrays.stream(result.split("\\r?\\n"))
                 .anyMatch(line -> line.substring(prefixLength).equals(packageName));
     }
 
     // Mostly copied from PkgInstallSignatureVerificationTest.java.
-    private String fastInstallPackage(String apkPath)
+    private void fastInstallPackage(String apkPath)
             throws IOException, DeviceNotAvailableException {
-        return getDevice().executeAdbCommand("install", "-t", "--fastdeploy", "--force-agent",
+        String result = getDevice().executeAdbCommand("install", "-t", "--fastdeploy", "--force-agent",
                 apkPath);
+        CLog.logAndDisplay(LogLevel.INFO, result);
     }
 }
 
diff --git a/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp b/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp
index 3dc5e50..932d579 100644
--- a/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp
+++ b/adb/fastdeploy/deploypatchgenerator/apk_archive.cpp
@@ -36,7 +36,7 @@
     FileRegion(borrowed_fd fd, off64_t offset, size_t length)
         : mapped_(android::base::MappedFile::FromOsHandle(adb_get_os_handle(fd), offset, length,
                                                           PROT_READ)) {
-        if (mapped_.data() != nullptr) {
+        if (mapped_ != nullptr) {
             return;
         }
 
@@ -50,14 +50,14 @@
         }
     }
 
-    const char* data() const { return mapped_.data() ? mapped_.data() : buffer_.data(); }
-    size_t size() const { return mapped_.data() ? mapped_.size() : buffer_.size(); }
+    const char* data() const { return mapped_ ? mapped_->data() : buffer_.data(); }
+    size_t size() const { return mapped_ ? mapped_->size() : buffer_.size(); }
 
   private:
     FileRegion() = default;
     DISALLOW_COPY_AND_ASSIGN(FileRegion);
 
-    android::base::MappedFile mapped_;
+    std::unique_ptr<android::base::MappedFile> mapped_;
     std::string buffer_;
 };
 }  // namespace
diff --git a/adb/file_sync_protocol.h b/adb/file_sync_protocol.h
index 108639a..508c138 100644
--- a/adb/file_sync_protocol.h
+++ b/adb/file_sync_protocol.h
@@ -21,10 +21,14 @@
 #define ID_LSTAT_V1 MKID('S', 'T', 'A', 'T')
 #define ID_STAT_V2 MKID('S', 'T', 'A', '2')
 #define ID_LSTAT_V2 MKID('L', 'S', 'T', '2')
-#define ID_LIST MKID('L', 'I', 'S', 'T')
+
+#define ID_LIST_V1 MKID('L', 'I', 'S', 'T')
+#define ID_LIST_V2 MKID('L', 'I', 'S', '2')
+#define ID_DENT_V1 MKID('D', 'E', 'N', 'T')
+#define ID_DENT_V2 MKID('D', 'N', 'T', '2')
+
 #define ID_SEND MKID('S', 'E', 'N', 'D')
 #define ID_RECV MKID('R', 'E', 'C', 'V')
-#define ID_DENT MKID('D', 'E', 'N', 'T')
 #define ID_DONE MKID('D', 'O', 'N', 'E')
 #define ID_DATA MKID('D', 'A', 'T', 'A')
 #define ID_OKAY MKID('O', 'K', 'A', 'Y')
@@ -42,7 +46,7 @@
         uint32_t id;
         uint32_t mode;
         uint32_t size;
-        uint32_t time;
+        uint32_t mtime;
     } stat_v1;
     struct __attribute__((packed)) {
         uint32_t id;
@@ -62,17 +66,32 @@
         uint32_t id;
         uint32_t mode;
         uint32_t size;
-        uint32_t time;
+        uint32_t mtime;
         uint32_t namelen;
-    } dent;
+    } dent_v1; // followed by `namelen` bytes of the name.
+    struct __attribute__((packed)) {
+        uint32_t id;
+        uint32_t error;
+        uint64_t dev;
+        uint64_t ino;
+        uint32_t mode;
+        uint32_t nlink;
+        uint32_t uid;
+        uint32_t gid;
+        uint64_t size;
+        int64_t atime;
+        int64_t mtime;
+        int64_t ctime;
+        uint32_t namelen;
+    } dent_v2; // followed by `namelen` bytes of the name.
     struct __attribute__((packed)) {
         uint32_t id;
         uint32_t size;
-    } data;
+    } data; // followed by `size` bytes of data.
     struct __attribute__((packed)) {
         uint32_t id;
         uint32_t msglen;
-    } status;
+    } status; // followed by `msglen` bytes of error message, if id == ID_FAIL.
 };
 
 #define SYNC_DATA_MAX (64 * 1024)
diff --git a/adb/socket_spec.cpp b/adb/socket_spec.cpp
index 98468b5..d17036c 100644
--- a/adb/socket_spec.cpp
+++ b/adb/socket_spec.cpp
@@ -16,6 +16,7 @@
 
 #include "socket_spec.h"
 
+#include <limits>
 #include <string>
 #include <string_view>
 #include <unordered_map>
@@ -28,10 +29,12 @@
 #include <cutils/sockets.h>
 
 #include "adb.h"
+#include "adb_utils.h"
 #include "sysdeps.h"
 
 using namespace std::string_literals;
 
+using android::base::ConsumePrefix;
 using android::base::StringPrintf;
 
 #if defined(__linux__)
@@ -119,6 +122,41 @@
     return true;
 }
 
+int get_host_socket_spec_port(std::string_view spec, std::string* error) {
+    int port;
+    if (spec.starts_with("tcp:")) {
+        if (!parse_tcp_socket_spec(spec, nullptr, &port, nullptr, error)) {
+            return -1;
+        }
+    } else if (spec.starts_with("vsock:")) {
+#if ADB_LINUX
+        std::string spec_str(spec);
+        std::vector<std::string> fragments = android::base::Split(spec_str, ":");
+        if (fragments.size() != 2) {
+            *error = "given vsock server socket string was invalid";
+            return -1;
+        }
+        if (!android::base::ParseInt(fragments[1], &port)) {
+            *error = "could not parse vsock port";
+            errno = EINVAL;
+            return -1;
+        }
+        if (port < 0) {
+            *error = "vsock port was negative.";
+            errno = EINVAL;
+            return -1;
+        }
+#else   // ADB_LINUX
+        *error = "vsock is only supported on linux";
+        return -1;
+#endif  // ADB_LINUX
+    } else {
+        *error = "given socket spec string was invalid";
+        return -1;
+    }
+    return port;
+}
+
 static bool tcp_host_is_local(std::string_view hostname) {
     // FIXME
     return hostname.empty() || hostname == "localhost";
@@ -131,7 +169,7 @@
             return true;
         }
     }
-    return spec.starts_with("tcp:");
+    return spec.starts_with("tcp:") || spec.starts_with("acceptfd:");
 }
 
 bool is_local_socket_spec(std::string_view spec) {
@@ -235,6 +273,9 @@
         *error = "vsock is only supported on linux";
         return false;
 #endif  // ADB_LINUX
+    } else if (address.starts_with("acceptfd:")) {
+        *error = "cannot connect to acceptfd";
+        return false;
     }
 
     for (const auto& it : kLocalSocketTypes) {
@@ -248,6 +289,14 @@
 
             fd->reset(network_local_client(&address[prefix.length()], it.second.socket_namespace,
                                            SOCK_STREAM, error));
+
+            if (fd->get() < 0) {
+                *error =
+                        android::base::StringPrintf("could not connect to %s address '%s'",
+                                                    it.first.c_str(), std::string(address).c_str());
+                return false;
+            }
+
             if (serial) {
                 *serial = address;
             }
@@ -269,10 +318,16 @@
         }
 
         int result;
+#if ADB_HOST
         if (hostname.empty() && gListenAll) {
+#else
+        if (hostname.empty()) {
+#endif
             result = network_inaddr_any_server(port, SOCK_STREAM, error);
         } else if (tcp_host_is_local(hostname)) {
-            result = network_loopback_server(port, SOCK_STREAM, error);
+            result = network_loopback_server(port, SOCK_STREAM, error, true);
+        } else if (hostname == "::1") {
+            result = network_loopback_server(port, SOCK_STREAM, error, false);
         } else {
             // TODO: Implement me.
             *error = "listening on specified hostname currently unsupported";
@@ -332,6 +387,46 @@
         *error = "vsock is only supported on linux";
         return -1;
 #endif  // ADB_LINUX
+    } else if (ConsumePrefix(&spec, "acceptfd:")) {
+#if ADB_WINDOWS
+        *error = "socket activation not supported under Windows";
+        return -1;
+#else
+        // We inherited the socket from some kind of launcher. It's already bound and
+        // listening. Return a copy of the FD instead of the FD itself so we implement the
+        // normal "listen" contract and can succeed more than once.
+        unsigned int fd_u;
+        if (!ParseUint(&fd_u, spec) || fd_u > std::numeric_limits<int>::max()) {
+            *error = "invalid fd";
+            return -1;
+        }
+        int fd = static_cast<int>(fd_u);
+        int flags = get_fd_flags(fd);
+        if (flags < 0) {
+            *error = android::base::StringPrintf("could not get flags of inherited fd %d: '%s'", fd,
+                                                 strerror(errno));
+            return -1;
+        }
+        if (flags & FD_CLOEXEC) {
+            *error = android::base::StringPrintf("fd %d was not inherited from parent", fd);
+            return -1;
+        }
+
+        int dummy_sock_type;
+        socklen_t dummy_sock_type_size = sizeof(dummy_sock_type);
+        if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &dummy_sock_type, &dummy_sock_type_size)) {
+            *error = android::base::StringPrintf("fd %d does not refer to a socket", fd);
+            return -1;
+        }
+
+        int new_fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
+        if (new_fd < 0) {
+            *error = android::base::StringPrintf("could not dup inherited fd %d: '%s'", fd,
+                                                 strerror(errno));
+            return -1;
+        }
+        return new_fd;
+#endif
     }
 
     for (const auto& it : kLocalSocketTypes) {
diff --git a/adb/socket_spec.h b/adb/socket_spec.h
index 7cc2fac..94719c8 100644
--- a/adb/socket_spec.h
+++ b/adb/socket_spec.h
@@ -31,3 +31,5 @@
 
 bool parse_tcp_socket_spec(std::string_view spec, std::string* hostname, int* port,
                            std::string* serial, std::string* error);
+
+int get_host_socket_spec_port(std::string_view spec, std::string* error);
diff --git a/adb/socket_spec_test.cpp b/adb/socket_spec_test.cpp
index 3a2f60c..e9d5270 100644
--- a/adb/socket_spec_test.cpp
+++ b/adb/socket_spec_test.cpp
@@ -18,6 +18,10 @@
 
 #include <string>
 
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
 #include <gtest/gtest.h>
 
 TEST(socket_spec, parse_tcp_socket_spec_just_port) {
@@ -88,3 +92,63 @@
     EXPECT_FALSE(parse_tcp_socket_spec("tcp:[::1]:", &hostname, &port, &serial, &error));
     EXPECT_FALSE(parse_tcp_socket_spec("tcp:[::1]:-1", &hostname, &port, &serial, &error));
 }
+
+TEST(socket_spec, get_host_socket_spec_port) {
+    std::string error;
+    EXPECT_EQ(5555, get_host_socket_spec_port("tcp:5555", &error));
+    EXPECT_EQ(5555, get_host_socket_spec_port("tcp:localhost:5555", &error));
+    EXPECT_EQ(5555, get_host_socket_spec_port("tcp:[::1]:5555", &error));
+    EXPECT_EQ(5555, get_host_socket_spec_port("vsock:5555", &error));
+}
+
+TEST(socket_spec, get_host_socket_spec_port_no_port) {
+    std::string error;
+    EXPECT_EQ(5555, get_host_socket_spec_port("tcp:localhost", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("vsock:localhost", &error));
+}
+
+TEST(socket_spec, get_host_socket_spec_port_bad_ports) {
+    std::string error;
+    EXPECT_EQ(-1, get_host_socket_spec_port("tcp:65536", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("tcp:-5", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("vsock:-5", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("vsock:5:5555", &error));
+}
+
+TEST(socket_spec, get_host_socket_spec_port_bad_string) {
+    std::string error;
+    EXPECT_EQ(-1, get_host_socket_spec_port("tcpz:5555", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("vsockz:5555", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("abcd:5555", &error));
+    EXPECT_EQ(-1, get_host_socket_spec_port("abcd", &error));
+}
+
+TEST(socket_spec, socket_spec_listen_connect_tcp) {
+    std::string error, serial;
+    int port;
+    unique_fd server_fd, client_fd;
+    EXPECT_FALSE(socket_spec_connect(&client_fd, "tcp:localhost:7777", &port, &serial, &error));
+    server_fd.reset(socket_spec_listen("tcp:7777", &error, &port));
+    EXPECT_NE(server_fd.get(), -1);
+    EXPECT_TRUE(socket_spec_connect(&client_fd, "tcp:localhost:7777", &port, &serial, &error));
+    EXPECT_NE(client_fd.get(), -1);
+}
+
+TEST(socket_spec, socket_spec_listen_connect_localfilesystem) {
+    std::string error, serial;
+    int port;
+    unique_fd server_fd, client_fd;
+    TemporaryDir sock_dir;
+
+    // Only run this test if the created directory is writable.
+    int result = access(sock_dir.path, W_OK);
+    if (result == 0) {
+        std::string sock_addr =
+                android::base::StringPrintf("localfilesystem:%s/af_unix_socket", sock_dir.path);
+        EXPECT_FALSE(socket_spec_connect(&client_fd, sock_addr, &port, &serial, &error));
+        server_fd.reset(socket_spec_listen(sock_addr, &error, &port));
+        EXPECT_NE(server_fd.get(), -1);
+        EXPECT_TRUE(socket_spec_connect(&client_fd, sock_addr, &port, &serial, &error));
+        EXPECT_NE(client_fd.get(), -1);
+    }
+}
diff --git a/adb/sockets.cpp b/adb/sockets.cpp
index e78530c..423af67 100644
--- a/adb/sockets.cpp
+++ b/adb/sockets.cpp
@@ -125,8 +125,7 @@
         if (rc > 0 && static_cast<size_t>(rc) == s->packet_queue.size()) {
             s->packet_queue.clear();
         } else if (rc > 0) {
-            // TODO: Implement a faster drop_front?
-            s->packet_queue.take_front(rc);
+            s->packet_queue.drop_front(rc);
             fdevent_add(s->fde, FDE_WRITE);
             return SocketFlushResult::TryAgain;
         } else if (rc == -1 && errno == EAGAIN) {
@@ -626,7 +625,8 @@
         return true;
     };
 
-    static constexpr std::string_view prefixes[] = {"usb:", "product:", "model:", "device:"};
+    static constexpr std::string_view prefixes[] = {
+            "usb:", "product:", "model:", "device:", "localfilesystem:"};
     for (std::string_view prefix : prefixes) {
         if (command.starts_with(prefix)) {
             consume(prefix.size());
diff --git a/adb/sysdeps.h b/adb/sysdeps.h
index 466c2ce..0c5a6b4 100644
--- a/adb/sysdeps.h
+++ b/adb/sysdeps.h
@@ -349,8 +349,15 @@
     return c == '/';
 }
 
+static __inline__ int get_fd_flags(borrowed_fd fd) {
+    return fcntl(fd.get(), F_GETFD);
+}
+
 static __inline__ void close_on_exec(borrowed_fd fd) {
-    fcntl(fd.get(), F_SETFD, FD_CLOEXEC);
+    int flags = get_fd_flags(fd);
+    if (flags >= 0 && (flags & FD_CLOEXEC) == 0) {
+        fcntl(fd.get(), F_SETFD, flags | FD_CLOEXEC);
+    }
 }
 
 // Open a file and return a file descriptor that may be used with unix_read(),
diff --git a/adb/sysdeps/network.h b/adb/sysdeps/network.h
index 83ce371..fadd155 100644
--- a/adb/sysdeps/network.h
+++ b/adb/sysdeps/network.h
@@ -19,4 +19,4 @@
 #include <string>
 
 int network_loopback_client(int port, int type, std::string* error);
-int network_loopback_server(int port, int type, std::string* error);
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4);
diff --git a/adb/sysdeps/posix/network.cpp b/adb/sysdeps/posix/network.cpp
index c5c2275..a4d9013 100644
--- a/adb/sysdeps/posix/network.cpp
+++ b/adb/sysdeps/posix/network.cpp
@@ -119,12 +119,15 @@
     return s.release();
 }
 
-int network_loopback_server(int port, int type, std::string* error) {
-    int rc = _network_loopback_server(false, port, type, error);
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4) {
+    int rc = -1;
+    if (prefer_ipv4) {
+        rc = _network_loopback_server(false, port, type, error);
+    }
 
-    // Only attempt to listen on IPv6 if IPv4 is unavailable.
+    // Only attempt to listen on IPv6 if IPv4 is unavailable or prefer_ipv4 is false
     // We don't want to start an IPv6 server if there's already an IPv4 one running.
-    if (rc == -1 && (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT)) {
+    if (rc == -1 && (errno == EADDRNOTAVAIL || errno == EAFNOSUPPORT || !prefer_ipv4)) {
         return _network_loopback_server(true, port, type, error);
     }
     return rc;
diff --git a/adb/sysdeps_win32.cpp b/adb/sysdeps_win32.cpp
index 4d6cf3d..d9cc36f 100644
--- a/adb/sysdeps_win32.cpp
+++ b/adb/sysdeps_win32.cpp
@@ -920,7 +920,8 @@
     return fd;
 }
 
-int network_loopback_server(int port, int type, std::string* error) {
+int network_loopback_server(int port, int type, std::string* error, bool prefer_ipv4) {
+    // TODO implement IPv6 support on windows
     return _network_server(port, type, INADDR_LOOPBACK, error);
 }
 
@@ -1132,7 +1133,7 @@
     int local_port = -1;
     std::string error;
 
-    server = network_loopback_server(0, SOCK_STREAM, &error);
+    server = network_loopback_server(0, SOCK_STREAM, &error, true);
     if (server < 0) {
         D("adb_socketpair: failed to create server: %s", error.c_str());
         goto fail;
diff --git a/adb/test_adb.py b/adb/test_adb.py
index 8272722..3d6de26 100755
--- a/adb/test_adb.py
+++ b/adb/test_adb.py
@@ -281,6 +281,37 @@
             subprocess.check_output(["adb", "-P", str(port), "kill-server"],
                                     stderr=subprocess.STDOUT)
 
+    @unittest.skipUnless(
+        os.name == "posix",
+        "adb doesn't yet support IPv6 on Windows",
+    )
+    def test_starts_on_ipv6_localhost(self):
+        """
+        Tests that the server can start up on ::1 and that it's accessible
+        """
+        server_port = 5037
+        # Kill any existing server on this non-default port.
+        subprocess.check_output(
+            ["adb", "-P", str(server_port), "kill-server"],
+            stderr=subprocess.STDOUT,
+        )
+        try:
+            subprocess.check_output(
+                ["adb", "-L", "tcp:[::1]:{}".format(server_port), "server"],
+                stderr=subprocess.STDOUT,
+            )
+            with fake_adbd() as (port, _):
+                with adb_connect(self, serial="localhost:{}".format(port)):
+                    pass
+        finally:
+            # If we started a server, kill it.
+            subprocess.check_output(
+                ["adb", "-P", str(server_port), "kill-server"],
+                stderr=subprocess.STDOUT,
+            )
+
+
+
 
 class EmulatorTest(unittest.TestCase):
     """Tests for the emulator connection."""
diff --git a/adb/test_device.py b/adb/test_device.py
index 57925e8..6a9ff89 100755
--- a/adb/test_device.py
+++ b/adb/test_device.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2015 The Android Open Source Project
@@ -81,6 +81,13 @@
         self.device = adb.get_device()
 
 
+class AbbTest(DeviceTest):
+    def test_smoke(self):
+        result = subprocess.run(['adb', 'abb'], capture_output=True)
+        self.assertEqual(1, result.returncode)
+        expected_output = b"cmd: No service specified; use -l to list all services\n"
+        self.assertEqual(expected_output, result.stderr)
+
 class ForwardReverseTest(DeviceTest):
     def _test_no_rebind(self, description, direction_list, direction,
                        direction_no_rebind, direction_remove_all):
@@ -246,7 +253,7 @@
                     # Accept the client connection.
                     accepted_connection, addr = listener.accept()
                     with contextlib.closing(accepted_connection) as server:
-                        data = 'hello'
+                        data = b'hello'
 
                         # Send data into the port setup by adb forward.
                         client.sendall(data)
@@ -254,7 +261,7 @@
                         client.close()
 
                         # Verify that the data came back via adb reverse.
-                        self.assertEqual(data, server.makefile().read())
+                        self.assertEqual(data, server.makefile().read().encode("utf8"))
         finally:
             if reverse_setup:
                 self.device.reverse_remove(forward_spec)
@@ -268,7 +275,7 @@
 
         Args:
           shell_args: List of string arguments to `adb shell`.
-          input: String input to send to the interactive shell.
+          input: bytes input to send to the interactive shell.
 
         Returns:
           The remote exit code.
@@ -286,7 +293,7 @@
         # Closing host-side stdin doesn't trigger a PTY shell to exit so we need
         # to explicitly add an exit command to close the session from the device
         # side, plus the necessary newline to complete the interactive command.
-        proc.communicate(input + '; exit\n')
+        proc.communicate(input + b'; exit\n')
         return proc.returncode
 
     def test_cat(self):
@@ -419,7 +426,7 @@
         self.assertEqual('foo' + self.device.linesep, result[1])
         self.assertEqual('bar' + self.device.linesep, result[2])
 
-        self.assertEqual(17, self._interactive_shell([], 'exit 17'))
+        self.assertEqual(17, self._interactive_shell([], b'exit 17'))
 
         # -x flag should disable shell protocol.
         result = self.device.shell_nocheck(
@@ -428,7 +435,7 @@
         self.assertEqual('foo{0}bar{0}'.format(self.device.linesep), result[1])
         self.assertEqual('', result[2])
 
-        self.assertEqual(0, self._interactive_shell(['-x'], 'exit 17'))
+        self.assertEqual(0, self._interactive_shell(['-x'], b'exit 17'))
 
     def test_non_interactive_sigint(self):
         """Tests that SIGINT in a non-interactive shell kills the process.
@@ -447,7 +454,7 @@
                 self.device.adb_cmd + shlex.split('shell echo $$; sleep 60'),
                 stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                 stderr=subprocess.STDOUT)
-        remote_pid = sleep_proc.stdout.readline().strip()
+        remote_pid = sleep_proc.stdout.readline().strip().decode("utf8")
         self.assertIsNone(sleep_proc.returncode, 'subprocess terminated early')
         proc_query = shlex.split('ps {0} | grep {0}'.format(remote_pid))
 
@@ -469,9 +476,10 @@
                                     'on this device')
 
         # Test both small and large inputs.
-        small_input = 'foo'
-        large_input = '\n'.join(c * 100 for c in (string.ascii_letters +
-                                                  string.digits))
+        small_input = b'foo'
+        characters = [c.encode("utf8") for c in string.ascii_letters + string.digits]
+        large_input = b'\n'.join(characters)
+
 
         for input in (small_input, large_input):
             proc = subprocess.Popen(self.device.adb_cmd + ['shell', 'cat'],
@@ -480,7 +488,7 @@
                                     stderr=subprocess.PIPE)
             stdout, stderr = proc.communicate(input)
             self.assertEqual(input.splitlines(), stdout.splitlines())
-            self.assertEqual('', stderr)
+            self.assertEqual(b'', stderr)
 
     def test_sighup(self):
         """Ensure that SIGHUP gets sent upon non-interactive ctrl-c"""
@@ -502,7 +510,7 @@
                                           stdin=subprocess.PIPE,
                                           stdout=subprocess.PIPE)
 
-        self.assertEqual("Waiting\n", process.stdout.readline())
+        self.assertEqual(b"Waiting\n", process.stdout.readline())
         process.send_signal(signal.SIGINT)
         process.wait()
 
@@ -533,9 +541,39 @@
             threads.append(thread)
         for thread in threads:
             thread.join()
-        for i, success in result.iteritems():
+        for i, success in result.items():
             self.assertTrue(success)
 
+    def disabled_test_parallel(self):
+        """Spawn a bunch of `adb shell` instances in parallel.
+
+        This was broken historically due to the use of select, which only works
+        for fds that are numerically less than 1024.
+
+        Bug: http://b/141955761"""
+
+        n_procs = 2048
+        procs = dict()
+        for i in range(0, n_procs):
+            procs[i] = subprocess.Popen(
+                ['adb', 'shell', 'read foo; echo $foo; read rc; exit $rc'],
+                stdin=subprocess.PIPE,
+                stdout=subprocess.PIPE
+            )
+
+        for i in range(0, n_procs):
+            procs[i].stdin.write("%d\n" % i)
+
+        for i in range(0, n_procs):
+            response = procs[i].stdout.readline()
+            assert(response == "%d\n" % i)
+
+        for i in range(0, n_procs):
+            procs[i].stdin.write("%d\n" % (i % 256))
+
+        for i in range(0, n_procs):
+            assert(procs[i].wait() == i % 256)
+
 
 class ArgumentEscapingTest(DeviceTest):
     def test_shell_escaping(self):
@@ -572,14 +610,14 @@
     def test_install_argument_escaping(self):
         """Make sure that install argument escaping works."""
         # http://b/20323053, http://b/3090932.
-        for file_suffix in ('-text;ls;1.apk', "-Live Hold'em.apk"):
+        for file_suffix in (b'-text;ls;1.apk', b"-Live Hold'em.apk"):
             tf = tempfile.NamedTemporaryFile('wb', suffix=file_suffix,
                                              delete=False)
             tf.close()
 
             # Installing bogus .apks fails if the device supports exit codes.
             try:
-                output = self.device.install(tf.name)
+                output = self.device.install(tf.name.decode("utf8"))
             except subprocess.CalledProcessError as e:
                 output = e.output
 
@@ -682,7 +720,7 @@
     max_size = 16 * (1 << 10)
 
     files = []
-    for _ in xrange(num_files):
+    for _ in range(num_files):
         file_handle = tempfile.NamedTemporaryFile(dir=in_dir, delete=False)
 
         size = random.randrange(min_size, max_size, 1024)
@@ -701,7 +739,7 @@
     max_size = 16 * (1 << 10)
 
     files = []
-    for file_num in xrange(num_files):
+    for file_num in range(num_files):
         size = random.randrange(min_size, max_size, 1024)
 
         base_name = prefix + str(file_num)
@@ -848,7 +886,7 @@
             subdir_temp_files = make_random_host_files(in_dir=subdir,
                                                        num_files=4)
 
-            paths = map(lambda temp_file: temp_file.full_path, temp_files)
+            paths = [x.full_path for x in temp_files]
             paths.append(subdir)
             self.device._simple_call(['push'] + paths + [self.DEVICE_TEMP_DIR])
 
@@ -877,7 +915,7 @@
         Bug: http://b/26816782
         """
         with tempfile.NamedTemporaryFile() as tmp_file:
-            tmp_file.write('\0' * 1024 * 1024)
+            tmp_file.write(b'\0' * 1024 * 1024)
             tmp_file.flush()
             try:
                 self.device.push(local=tmp_file.name, remote='/system/')
@@ -885,8 +923,8 @@
             except subprocess.CalledProcessError as e:
                 output = e.output
 
-            self.assertTrue('Permission denied' in output or
-                            'Read-only file system' in output)
+            self.assertTrue(b'Permission denied' in output or
+                            b'Read-only file system' in output)
 
     @requires_non_root
     def test_push_directory_creation(self):
@@ -895,7 +933,7 @@
         Bug: http://b/110953234
         """
         with tempfile.NamedTemporaryFile() as tmp_file:
-            tmp_file.write('\0' * 1024 * 1024)
+            tmp_file.write(b'\0' * 1024 * 1024)
             tmp_file.flush()
             remote_path = self.DEVICE_TEMP_DIR + '/test_push_directory_creation'
             self.device.shell(['rm', '-rf', remote_path])
@@ -937,7 +975,7 @@
         except subprocess.CalledProcessError as e:
             output = e.output
 
-        self.assertIn('Permission denied', output)
+        self.assertIn(b'Permission denied', output)
 
         self.device.shell(['rm', '-f', self.DEVICE_TEMP_FILE])
 
@@ -1136,7 +1174,7 @@
             subdir_temp_files = make_random_device_files(
                 self.device, in_dir=subdir, num_files=4, prefix='subdir_')
 
-            paths = map(lambda temp_file: temp_file.full_path, temp_files)
+            paths = [x.full_path for x in temp_files]
             paths.append(subdir)
             self.device._simple_call(['pull'] + paths + [host_dir])
 
@@ -1325,7 +1363,7 @@
         """
         # The values that trigger things are 507 (512 - 5 bytes from shell protocol) + 1024*n
         # Probe some surrounding values as well, for the hell of it.
-        for base in [512] + range(1024, 1024 * 16, 1024):
+        for base in [512] + list(range(1024, 1024 * 16, 1024)):
             for offset in [-6, -5, -4]:
                 length = base + offset
                 cmd = ['dd', 'if=/dev/zero', 'bs={}'.format(length), 'count=1', '2>/dev/null;'
@@ -1360,10 +1398,10 @@
 
                 sock = socket.create_connection(("localhost", local_port))
                 with contextlib.closing(sock):
-                    bytesWritten = sock.send("a" * size)
+                    bytesWritten = sock.send(b"a" * size)
                     self.assertEqual(size, bytesWritten)
                     readBytes = sock.recv(4096)
-                    self.assertEqual("foo\n", readBytes)
+                    self.assertEqual(b"foo\n", readBytes)
 
                 thread.join()
         finally:
@@ -1394,13 +1432,13 @@
 
         s.sendall(adb_length_prefixed(transport_string))
         response = s.recv(4)
-        self.assertEquals(b"OKAY", response)
+        self.assertEqual(b"OKAY", response)
 
         shell_string = "shell:sleep 0.5; dd if=/dev/zero bs=1m count=1 status=none; echo foo"
         s.sendall(adb_length_prefixed(shell_string))
 
         response = s.recv(4)
-        self.assertEquals(b"OKAY", response)
+        self.assertEqual(b"OKAY", response)
 
         # Spawn a thread that dumps garbage into the socket until failure.
         def spam():
@@ -1423,7 +1461,7 @@
                 break
             received += read
 
-        self.assertEquals(1024 * 1024 + len("foo\n"), len(received))
+        self.assertEqual(1024 * 1024 + len("foo\n"), len(received))
         thread.join()
 
 
diff --git a/adb/transport.cpp b/adb/transport.cpp
index d9749ac..9dd6ec6 100644
--- a/adb/transport.cpp
+++ b/adb/transport.cpp
@@ -55,7 +55,7 @@
 using android::base::ScopedLockAssertion;
 
 static void remove_transport(atransport* transport);
-static void transport_unref(atransport* transport);
+static void transport_destroy(atransport* transport);
 
 // TODO: unordered_map<TransportId, atransport*>
 static auto& transport_list = *new std::list<atransport*>();
@@ -66,6 +66,7 @@
 const char* const kFeatureShell2 = "shell_v2";
 const char* const kFeatureCmd = "cmd";
 const char* const kFeatureStat2 = "stat_v2";
+const char* const kFeatureLs2 = "ls_v2";
 const char* const kFeatureLibusb = "libusb";
 const char* const kFeaturePushSync = "push_sync";
 const char* const kFeatureApex = "apex";
@@ -676,7 +677,6 @@
     if (t->GetConnectionState() != kCsNoPerm) {
         // The connection gets a reference to the atransport. It will release it
         // upon a read/write error.
-        t->ref_count++;
         t->connection()->SetTransportName(t->serial_name());
         t->connection()->SetReadCallback([t](Connection*, std::unique_ptr<apacket> p) {
             if (!check_header(p.get(), t)) {
@@ -695,7 +695,7 @@
             LOG(INFO) << t->serial_name() << ": connection terminated: " << error;
             fdevent_run_on_main_thread([t]() {
                 handle_offline(t);
-                transport_unref(t);
+                transport_destroy(t);
             });
         });
 
@@ -771,36 +771,27 @@
     }
 }
 
-static void transport_unref(atransport* t) {
+static void transport_destroy(atransport* t) {
     check_main_thread();
     CHECK(t != nullptr);
 
     std::lock_guard<std::recursive_mutex> lock(transport_lock);
-    CHECK_GT(t->ref_count, 0u);
-    t->ref_count--;
-    if (t->ref_count == 0) {
-        LOG(INFO) << "destroying transport " << t->serial_name();
-        t->connection()->Stop();
+    LOG(INFO) << "destroying transport " << t->serial_name();
+    t->connection()->Stop();
 #if ADB_HOST
-        if (t->IsTcpDevice() && !t->kicked()) {
-            D("transport: %s unref (attempting reconnection)", t->serial.c_str());
+    if (t->IsTcpDevice() && !t->kicked()) {
+        D("transport: %s destroy (attempting reconnection)", t->serial.c_str());
 
-            // We need to clear the transport's keys, so that on the next connection, it tries
-            // again from the beginning.
-            t->ResetKeys();
-            reconnect_handler.TrackTransport(t);
-        } else {
-            D("transport: %s unref (kicking and closing)", t->serial.c_str());
-            remove_transport(t);
-        }
-#else
-        D("transport: %s unref (kicking and closing)", t->serial.c_str());
-        remove_transport(t);
+        // We need to clear the transport's keys, so that on the next connection, it tries
+        // again from the beginning.
+        t->ResetKeys();
+        reconnect_handler.TrackTransport(t);
+        return;
+    }
 #endif
 
-    } else {
-        D("transport: %s unref (count=%zu)", t->serial.c_str(), t->ref_count);
-    }
+    D("transport: %s destroy (kicking and closing)", t->serial.c_str());
+    remove_transport(t);
 }
 
 static int qual_match(const std::string& to_test, const char* prefix, const std::string& qual,
@@ -1045,6 +1036,7 @@
             kFeatureShell2,
             kFeatureCmd,
             kFeatureStat2,
+            kFeatureLs2,
             kFeatureFixedPushMkdir,
             kFeatureApex,
             kFeatureAbb,
diff --git a/adb/transport.h b/adb/transport.h
index c38cb1d..5a750ee 100644
--- a/adb/transport.h
+++ b/adb/transport.h
@@ -38,6 +38,7 @@
 
 #include "adb.h"
 #include "adb_unique_fd.h"
+#include "types.h"
 #include "usb.h"
 
 typedef std::unordered_set<std::string> FeatureSet;
@@ -57,6 +58,7 @@
 // The 'cmd' command is available
 extern const char* const kFeatureCmd;
 extern const char* const kFeatureStat2;
+extern const char* const kFeatureLs2;
 // The server is running with libusb enabled.
 extern const char* const kFeatureLibusb;
 // adbd supports `push --sync`.
@@ -222,7 +224,7 @@
     Abort,
 };
 
-class atransport {
+class atransport : public enable_weak_from_this<atransport> {
   public:
     // TODO(danalbert): We expose waaaaaaay too much stuff because this was
     // historically just a struct, but making the whole thing a more idiomatic
@@ -245,7 +247,7 @@
     }
     atransport(ConnectionState state = kCsOffline)
         : atransport([](atransport*) { return ReconnectResult::Abort; }, state) {}
-    virtual ~atransport();
+    ~atransport();
 
     int Write(apacket* p);
     void Reset();
@@ -266,7 +268,7 @@
     usb_handle* GetUsbHandle() { return usb_handle_; }
 
     const TransportId id;
-    size_t ref_count = 0;
+
     bool online = false;
     TransportType type = kTransportAny;
 
@@ -277,8 +279,11 @@
     std::string device;
     std::string devpath;
 
+#if !ADB_HOST
     // Used to provide the key to the framework.
     std::string auth_key;
+    uint64_t auth_id;
+#endif
 
     bool IsTcpDevice() const { return type == kTransportLocal; }
 
@@ -420,11 +425,12 @@
 asocket* create_device_tracker(bool long_output);
 
 #if !ADB_HOST
-unique_fd tcp_listen_inaddr_any(int port, std::string* error);
-void server_socket_thread(std::function<unique_fd(int, std::string*)> listen_func, int port);
+unique_fd adb_listen(std::string_view addr, std::string* error);
+void server_socket_thread(std::function<unique_fd(std::string_view, std::string*)> listen_func,
+                          std::string_view addr);
 
 #if defined(__ANDROID__)
-void qemu_socket_thread(int port);
+void qemu_socket_thread(std::string_view addr);
 bool use_qemu_goldfish();
 #endif
 
diff --git a/adb/transport_fd.cpp b/adb/transport_fd.cpp
index a93e68a..8d2ad66 100644
--- a/adb/transport_fd.cpp
+++ b/adb/transport_fd.cpp
@@ -93,8 +93,8 @@
 
                 if (pfds[0].revents & POLLIN) {
                     // TODO: Should we be getting blocks from a free list?
-                    auto block = std::make_unique<IOVector::block_type>(MAX_PAYLOAD);
-                    rc = adb_read(fd_.get(), &(*block)[0], block->size());
+                    auto block = IOVector::block_type(MAX_PAYLOAD);
+                    rc = adb_read(fd_.get(), &block[0], block.size());
                     if (rc == -1) {
                         *error = std::string("read failed: ") + strerror(errno);
                         return;
@@ -102,7 +102,7 @@
                         *error = "read failed: EOF";
                         return;
                     }
-                    block->resize(rc);
+                    block.resize(rc);
                     read_buffer_.append(std::move(block));
 
                     if (!read_header_ && read_buffer_.size() >= sizeof(amessage)) {
@@ -116,7 +116,7 @@
                         auto data_chain = read_buffer_.take_front(read_header_->data_length);
 
                         // TODO: Make apacket carry around a IOVector instead of coalescing.
-                        auto payload = data_chain.coalesce<apacket::payload_type>();
+                        auto payload = std::move(data_chain).coalesce();
                         auto packet = std::make_unique<apacket>();
                         packet->msg = *read_header_;
                         packet->payload = std::move(payload);
@@ -184,8 +184,7 @@
             return WriteResult::Error;
         }
 
-        // TODO: Implement a more efficient drop_front?
-        write_buffer_.take_front(rc);
+        write_buffer_.drop_front(rc);
         writable_ = write_buffer_.empty();
         if (write_buffer_.empty()) {
             return WriteResult::Completed;
@@ -199,10 +198,10 @@
         std::lock_guard<std::mutex> lock(write_mutex_);
         const char* header_begin = reinterpret_cast<const char*>(&packet->msg);
         const char* header_end = header_begin + sizeof(packet->msg);
-        auto header_block = std::make_unique<IOVector::block_type>(header_begin, header_end);
+        auto header_block = IOVector::block_type(header_begin, header_end);
         write_buffer_.append(std::move(header_block));
         if (!packet->payload.empty()) {
-            write_buffer_.append(std::make_unique<IOVector::block_type>(std::move(packet->payload)));
+            write_buffer_.append(std::move(packet->payload));
         }
 
         WriteResult result = DispatchWrites();
diff --git a/adb/transport_local.cpp b/adb/transport_local.cpp
index b9f738d..c726186 100644
--- a/adb/transport_local.cpp
+++ b/adb/transport_local.cpp
@@ -85,22 +85,6 @@
     return local_connect_arbitrary_ports(port - 1, port, &dummy) == 0;
 }
 
-std::tuple<unique_fd, int, std::string> tcp_connect(const std::string& address,
-                                                    std::string* response) {
-    unique_fd fd;
-    int port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT;
-    std::string serial;
-    std::string prefix_addr = address.starts_with("vsock:") ? address : "tcp:" + address;
-    if (socket_spec_connect(&fd, prefix_addr, &port, &serial, response)) {
-        close_on_exec(fd);
-        if (!set_tcp_keepalive(fd, 1)) {
-            D("warning: failed to configure TCP keepalives (%s)", strerror(errno));
-        }
-        return std::make_tuple(std::move(fd), port, serial);
-    }
-    return std::make_tuple(unique_fd(), 0, serial);
-}
-
 void connect_device(const std::string& address, std::string* response) {
     if (address.empty()) {
         *response = "empty address";
@@ -110,17 +94,25 @@
     D("connection requested to '%s'", address.c_str());
     unique_fd fd;
     int port;
-    std::string serial;
-    std::tie(fd, port, serial) = tcp_connect(address, response);
+    std::string serial, prefix_addr;
+
+    // If address does not match any socket type, it should default to TCP.
+    if (address.starts_with("vsock:") || address.starts_with("localfilesystem:")) {
+        prefix_addr = address;
+    } else {
+        prefix_addr = "tcp:" + address;
+    }
+
+    socket_spec_connect(&fd, prefix_addr, &port, &serial, response);
     if (fd.get() == -1) {
         return;
     }
-    auto reconnect = [address](atransport* t) {
+    auto reconnect = [prefix_addr](atransport* t) {
         std::string response;
         unique_fd fd;
         int port;
         std::string serial;
-        std::tie(fd, port, serial) = tcp_connect(address, &response);
+        socket_spec_connect(&fd, prefix_addr, &port, &serial, &response);
         if (fd == -1) {
             D("reconnect failed: %s", response.c_str());
             return ReconnectResult::Retry;
@@ -203,7 +195,7 @@
 std::mutex &retry_ports_lock = *new std::mutex;
 std::condition_variable &retry_ports_cond = *new std::condition_variable;
 
-static void client_socket_thread(int) {
+static void client_socket_thread(std::string_view) {
     adb_thread_setname("client_socket_thread");
     D("transport: client_socket_thread() starting");
     PollAllLocalPortsForEmulator();
@@ -248,7 +240,8 @@
 
 #else  // !ADB_HOST
 
-void server_socket_thread(std::function<unique_fd(int, std::string*)> listen_func, int port) {
+void server_socket_thread(std::function<unique_fd(std::string_view, std::string*)> listen_func,
+                          std::string_view addr) {
     adb_thread_setname("server socket");
 
     unique_fd serverfd;
@@ -256,7 +249,7 @@
 
     while (serverfd == -1) {
         errno = 0;
-        serverfd = listen_func(port, &error);
+        serverfd = listen_func(addr, &error);
         if (errno == EAFNOSUPPORT || errno == EINVAL || errno == EPROTONOSUPPORT) {
             D("unrecoverable error: '%s'", error.c_str());
             return;
@@ -276,7 +269,9 @@
             close_on_exec(fd.get());
             disable_tcp_nagle(fd.get());
             std::string serial = android::base::StringPrintf("host-%d", fd.get());
-            register_socket_transport(std::move(fd), std::move(serial), port, 1,
+            // We don't care about port value in "register_socket_transport" as it is used
+            // only from ADB_HOST. "server_socket_thread" is never called from ADB_HOST.
+            register_socket_transport(std::move(fd), std::move(serial), 0, 1,
                                       [](atransport*) { return ReconnectResult::Abort; });
         }
     }
@@ -285,38 +280,30 @@
 
 #endif
 
-unique_fd tcp_listen_inaddr_any(int port, std::string* error) {
-    return unique_fd{network_inaddr_any_server(port, SOCK_STREAM, error)};
-}
-
 #if !ADB_HOST
-static unique_fd vsock_listen(int port, std::string* error) {
-    return unique_fd{
-        socket_spec_listen(android::base::StringPrintf("vsock:%d", port), error, nullptr)
-    };
+unique_fd adb_listen(std::string_view addr, std::string* error) {
+    return unique_fd{socket_spec_listen(addr, error, nullptr)};
 }
 #endif
 
-void local_init(int port) {
+void local_init(const std::string& addr) {
 #if ADB_HOST
     D("transport: local client init");
-    std::thread(client_socket_thread, port).detach();
+    std::thread(client_socket_thread, addr).detach();
     adb_local_transport_max_port_env_override();
 #elif !defined(__ANDROID__)
     // Host adbd.
     D("transport: local server init");
-    std::thread(server_socket_thread, tcp_listen_inaddr_any, port).detach();
-    std::thread(server_socket_thread, vsock_listen, port).detach();
+    std::thread(server_socket_thread, adb_listen, addr).detach();
 #else
     D("transport: local server init");
     // For the adbd daemon in the system image we need to distinguish
     // between the device, and the emulator.
-    if (use_qemu_goldfish()) {
-        std::thread(qemu_socket_thread, port).detach();
+    if (addr.starts_with("tcp:") && use_qemu_goldfish()) {
+        std::thread(qemu_socket_thread, addr).detach();
     } else {
-        std::thread(server_socket_thread, tcp_listen_inaddr_any, port).detach();
+        std::thread(server_socket_thread, adb_listen, addr).detach();
     }
-    std::thread(server_socket_thread, vsock_listen, port).detach();
 #endif // !ADB_HOST
 }
 
diff --git a/adb/types.cpp b/adb/types.cpp
new file mode 100644
index 0000000..26b77ab
--- /dev/null
+++ b/adb/types.cpp
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "types.h"
+
+IOVector& IOVector::operator=(IOVector&& move) noexcept {
+    chain_ = std::move(move.chain_);
+    chain_length_ = move.chain_length_;
+    begin_offset_ = move.begin_offset_;
+    start_index_ = move.start_index_;
+
+    move.clear();
+    return *this;
+}
+
+IOVector::block_type IOVector::clear() {
+    chain_length_ = 0;
+    begin_offset_ = 0;
+    start_index_ = 0;
+    block_type res;
+    if (!chain_.empty()) {
+        res = std::move(chain_.back());
+    }
+    chain_.clear();
+    return res;
+}
+
+void IOVector::drop_front(IOVector::size_type len) {
+    if (len == 0) {
+        return;
+    }
+    if (len == size()) {
+        clear();
+        return;
+    }
+    CHECK_LT(len, size());
+
+    auto dropped = 0u;
+    while (dropped < len) {
+        const auto next = chain_[start_index_].size() - begin_offset_;
+        if (dropped + next < len) {
+            pop_front_block();
+            dropped += next;
+        } else {
+            const auto taken = len - dropped;
+            begin_offset_ += taken;
+            break;
+        }
+    }
+}
+
+IOVector IOVector::take_front(IOVector::size_type len) {
+    if (len == 0) {
+        return {};
+    }
+    if (len == size()) {
+        return std::move(*this);
+    }
+
+    CHECK_GE(size(), len);
+    IOVector res;
+    // first iterate over the blocks that completely go into the other vector
+    while (chain_[start_index_].size() - begin_offset_ <= len) {
+        chain_length_ -= chain_[start_index_].size();
+        len -= chain_[start_index_].size() - begin_offset_;
+        if (chain_[start_index_].size() > begin_offset_) {
+            res.append(std::move(chain_[start_index_]));
+            if (begin_offset_) {
+                res.begin_offset_ = std::exchange(begin_offset_, 0);
+            }
+        } else {
+            begin_offset_ = 0;
+        }
+        ++start_index_;
+    }
+
+    if (len > 0) {
+        // what's left is a single buffer that needs to be split between the |res| and |this|
+        // we know that it has to be split - there was a check for the case when it has to
+        // go away as a whole.
+        if (begin_offset_ != 0 || len < chain_[start_index_].size() / 2) {
+            // let's memcpy the data out
+            block_type block(chain_[start_index_].begin() + begin_offset_,
+                             chain_[start_index_].begin() + begin_offset_ + len);
+            res.append(std::move(block));
+            begin_offset_ += len;
+        } else {
+            CHECK_EQ(begin_offset_, 0u);
+            // move out the internal buffer out and copy only the tail of it back in
+            block_type block(chain_[start_index_].begin() + len, chain_[start_index_].end());
+            chain_length_ -= chain_[start_index_].size();
+            chain_[start_index_].resize(len);
+            res.append(std::move(chain_[start_index_]));
+            chain_length_ += block.size();
+            chain_[start_index_] = std::move(block);
+        }
+    }
+    return res;
+}
+
+void IOVector::trim_front() {
+    if ((begin_offset_ == 0 && start_index_ == 0) || chain_.empty()) {
+        return;
+    }
+    block_type& first_block = chain_[start_index_];
+    if (begin_offset_ == first_block.size()) {
+        ++start_index_;
+    } else {
+        memmove(first_block.data(), first_block.data() + begin_offset_,
+                first_block.size() - begin_offset_);
+        first_block.resize(first_block.size() - begin_offset_);
+    }
+    chain_length_ -= begin_offset_;
+    begin_offset_ = 0;
+    trim_chain_front();
+}
+
+void IOVector::trim_chain_front() {
+    if (start_index_) {
+        chain_.erase(chain_.begin(), chain_.begin() + start_index_);
+        start_index_ = 0;
+    }
+}
+
+void IOVector::pop_front_block() {
+    chain_length_ -= chain_[start_index_].size();
+    begin_offset_ = 0;
+    chain_[start_index_].clear();
+    ++start_index_;
+    if (start_index_ > std::max<size_t>(4, chain_.size() / 2)) {
+        trim_chain_front();
+    }
+}
+
+IOVector::block_type IOVector::coalesce() && {
+    // Destructive coalesce() may optimize for several cases when it doesn't need to allocate
+    // new buffer, or even return one of the existing blocks as is. The only guarantee is that
+    // after this call the IOVector is in some valid state. Nothing is guaranteed about the
+    // specifics.
+    if (size() == 0) {
+        return {};
+    }
+    if (begin_offset_ == chain_[start_index_].size() && chain_.size() == start_index_ + 2) {
+        chain_length_ -= chain_.back().size();
+        auto res = std::move(chain_.back());
+        chain_.pop_back();
+        return res;
+    }
+    if (chain_.size() == start_index_ + 1) {
+        chain_length_ -= chain_.back().size();
+        auto res = std::move(chain_.back());
+        chain_.pop_back();
+        if (begin_offset_ != 0) {
+            memmove(res.data(), res.data() + begin_offset_, res.size() - begin_offset_);
+            res.resize(res.size() - begin_offset_);
+            begin_offset_ = 0;
+        }
+        return res;
+    }
+    if (auto& firstBuffer = chain_[start_index_]; firstBuffer.capacity() >= size()) {
+        auto res = std::move(chain_[start_index_]);
+        auto size = res.size();
+        chain_length_ -= size;
+        if (begin_offset_ != 0) {
+            memmove(res.data(), res.data() + begin_offset_, res.size() - begin_offset_);
+            size -= begin_offset_;
+            begin_offset_ = 0;
+        }
+        for (auto i = start_index_ + 1; i < chain_.size(); ++i) {
+            memcpy(res.data() + size, chain_[i].data(), chain_[i].size());
+            size += chain_[i].size();
+        }
+        res.resize(size);
+        ++start_index_;
+        return res;
+    }
+    return const_cast<const IOVector*>(this)->coalesce<>();
+}
+
+std::vector<adb_iovec> IOVector::iovecs() const {
+    std::vector<adb_iovec> result;
+    result.reserve(chain_.size() - start_index_);
+    iterate_blocks([&result](const char* data, size_t len) {
+        adb_iovec iov;
+        iov.iov_base = const_cast<char*>(data);
+        iov.iov_len = len;
+        result.emplace_back(iov);
+    });
+
+    return result;
+}
diff --git a/adb/types.h b/adb/types.h
index 8bd66be..c619fff 100644
--- a/adb/types.h
+++ b/adb/types.h
@@ -19,21 +19,20 @@
 #include <string.h>
 
 #include <algorithm>
-#include <deque>
 #include <memory>
-#include <type_traits>
 #include <utility>
 #include <vector>
 
 #include <android-base/logging.h>
 
+#include "fdevent/fdevent.h"
 #include "sysdeps/uio.h"
 
 // Essentially std::vector<char>, except without zero initialization or reallocation.
 struct Block {
     using iterator = char*;
 
-    Block() {}
+    Block() = default;
 
     explicit Block(size_t size) { allocate(size); }
 
@@ -43,24 +42,21 @@
     }
 
     Block(const Block& copy) = delete;
-    Block(Block&& move) noexcept {
-        std::swap(data_, move.data_);
-        std::swap(capacity_, move.capacity_);
-        std::swap(size_, move.size_);
-    }
+    Block(Block&& move) noexcept
+        : data_(std::exchange(move.data_, nullptr)),
+          capacity_(std::exchange(move.capacity_, 0)),
+          size_(std::exchange(move.size_, 0)) {}
 
     Block& operator=(const Block& copy) = delete;
     Block& operator=(Block&& move) noexcept {
         clear();
-
-        std::swap(data_, move.data_);
-        std::swap(capacity_, move.capacity_);
-        std::swap(size_, move.size_);
-
+        data_ = std::exchange(move.data_, nullptr);
+        capacity_ = std::exchange(move.capacity_, 0);
+        size_ = std::exchange(move.size_, 0);
         return *this;
     }
 
-    ~Block() { clear(); }
+    ~Block() = default;
 
     void resize(size_t new_size) {
         if (!data_) {
@@ -144,146 +140,63 @@
     using block_type = Block;
     using size_type = size_t;
 
-    IOVector() {}
+    IOVector() = default;
 
-    explicit IOVector(std::unique_ptr<block_type> block) {
-        append(std::move(block));
-    }
+    explicit IOVector(block_type&& block) { append(std::move(block)); }
 
     IOVector(const IOVector& copy) = delete;
     IOVector(IOVector&& move) noexcept : IOVector() { *this = std::move(move); }
 
     IOVector& operator=(const IOVector& copy) = delete;
-    IOVector& operator=(IOVector&& move) noexcept {
-        chain_ = std::move(move.chain_);
-        chain_length_ = move.chain_length_;
-        begin_offset_ = move.begin_offset_;
-        end_offset_ = move.end_offset_;
+    IOVector& operator=(IOVector&& move) noexcept;
 
-        move.chain_.clear();
-        move.chain_length_ = 0;
-        move.begin_offset_ = 0;
-        move.end_offset_ = 0;
-
-        return *this;
-    }
-
-    size_type size() const { return chain_length_ - begin_offset_ - end_offset_; }
+    size_type size() const { return chain_length_ - begin_offset_; }
     bool empty() const { return size() == 0; }
 
-    void clear() {
-        chain_length_ = 0;
-        begin_offset_ = 0;
-        end_offset_ = 0;
-        chain_.clear();
-    }
+    // Return the last block so the caller can still reuse its allocated capacity
+    // or it can be simply ignored.
+    block_type clear();
+
+    void drop_front(size_type len);
 
     // Split the first |len| bytes out of this chain into its own.
-    IOVector take_front(size_type len) {
-        IOVector head;
-
-        if (len == 0) {
-            return head;
-        }
-        CHECK_GE(size(), len);
-
-        std::shared_ptr<const block_type> first_block = chain_.front();
-        CHECK_GE(first_block->size(), begin_offset_);
-        head.append_shared(std::move(first_block));
-        head.begin_offset_ = begin_offset_;
-
-        while (head.size() < len) {
-            pop_front_block();
-            CHECK(!chain_.empty());
-
-            head.append_shared(chain_.front());
-        }
-
-        if (head.size() == len) {
-            // Head takes full ownership of the last block it took.
-            head.end_offset_ = 0;
-            begin_offset_ = 0;
-            pop_front_block();
-        } else {
-            // Head takes partial ownership of the last block it took.
-            size_t bytes_taken = head.size() - len;
-            head.end_offset_ = bytes_taken;
-            CHECK_GE(chain_.front()->size(), bytes_taken);
-            begin_offset_ = chain_.front()->size() - bytes_taken;
-        }
-
-        return head;
-    }
+    IOVector take_front(size_type len);
 
     // Add a nonempty block to the chain.
-    // The end of the chain must be a complete block (i.e. end_offset_ == 0).
-    void append(std::unique_ptr<const block_type> block) {
-        if (block->size() == 0) {
+    void append(block_type&& block) {
+        if (block.size() == 0) {
             return;
         }
-
-        CHECK_EQ(0ULL, end_offset_);
-        chain_length_ += block->size();
+        CHECK_NE(0ULL, block.size());
+        chain_length_ += block.size();
         chain_.emplace_back(std::move(block));
     }
 
-    void append(block_type&& block) { append(std::make_unique<block_type>(std::move(block))); }
-
-    void trim_front() {
-        if (begin_offset_ == 0) {
-            return;
-        }
-
-        const block_type* first_block = chain_.front().get();
-        auto copy = std::make_unique<block_type>(first_block->size() - begin_offset_);
-        memcpy(copy->data(), first_block->data() + begin_offset_, copy->size());
-        chain_.front() = std::move(copy);
-
-        chain_length_ -= begin_offset_;
-        begin_offset_ = 0;
-    }
+    void trim_front();
 
   private:
-    // append, except takes a shared_ptr.
-    // Private to prevent exterior mutation of blocks.
-    void append_shared(std::shared_ptr<const block_type> block) {
-        CHECK_NE(0ULL, block->size());
-        CHECK_EQ(0ULL, end_offset_);
-        chain_length_ += block->size();
-        chain_.emplace_back(std::move(block));
-    }
+    void trim_chain_front();
 
     // Drop the front block from the chain, and update chain_length_ appropriately.
-    void pop_front_block() {
-        chain_length_ -= chain_.front()->size();
-        begin_offset_ = 0;
-        chain_.pop_front();
-    }
+    void pop_front_block();
 
     // Iterate over the blocks with a callback with an operator()(const char*, size_t).
     template <typename Fn>
     void iterate_blocks(Fn&& callback) const {
-        if (chain_.size() == 0) {
+        if (size() == 0) {
             return;
         }
 
-        for (size_t i = 0; i < chain_.size(); ++i) {
-            const std::shared_ptr<const block_type>& block = chain_.at(i);
-            const char* begin = block->data();
-            size_t length = block->size();
+        for (size_t i = start_index_; i < chain_.size(); ++i) {
+            const auto& block = chain_[i];
+            const char* begin = block.data();
+            size_t length = block.size();
 
-            // Note that both of these conditions can be true if there's only one block.
-            if (i == 0) {
-                CHECK_GE(block->size(), begin_offset_);
+            if (i == start_index_) {
+                CHECK_GE(block.size(), begin_offset_);
                 begin += begin_offset_;
                 length -= begin_offset_;
             }
-
-            if (i == chain_.size() - 1) {
-                CHECK_GE(length, end_offset_);
-                length -= end_offset_;
-            }
-
             callback(begin, length);
         }
     }
@@ -291,7 +204,7 @@
   public:
     // Copy all of the blocks into a single block.
     template <typename CollectionType = block_type>
-    CollectionType coalesce() const {
+    CollectionType coalesce() const& {
         CollectionType result;
         if (size() == 0) {
             return result;
@@ -308,12 +221,13 @@
         return result;
     }
 
+    block_type coalesce() &&;
+
     template <typename FunctionType>
-    auto coalesced(FunctionType&& f) const ->
-        typename std::result_of<FunctionType(const char*, size_t)>::type {
-        if (chain_.size() == 1) {
+    auto coalesced(FunctionType&& f) const {
+        if (chain_.size() == start_index_ + 1) {
             // If we only have one block, we can use it directly.
-            return f(chain_.front()->data() + begin_offset_, size());
+            return f(chain_[start_index_].data() + begin_offset_, size());
         } else {
             // Otherwise, copy to a single block.
             auto data = coalesce();
@@ -322,23 +236,107 @@
     }
 
     // Get a list of iovecs that can be used to write out all of the blocks.
-    std::vector<adb_iovec> iovecs() const {
-        std::vector<adb_iovec> result;
-        iterate_blocks([&result](const char* data, size_t len) {
-            adb_iovec iov;
-            iov.iov_base = const_cast<char*>(data);
-            iov.iov_len = len;
-            result.emplace_back(iov);
-        });
-
-        return result;
-    }
+    std::vector<adb_iovec> iovecs() const;
 
   private:
     // Total length of all of the blocks in the chain.
     size_t chain_length_ = 0;
 
     size_t begin_offset_ = 0;
-    size_t end_offset_ = 0;
-    std::deque<std::shared_ptr<const block_type>> chain_;
+    size_t start_index_ = 0;
+    std::vector<block_type> chain_;
+};
+
+// An implementation of weak pointers tied to the fdevent run loop.
+//
+// This allows for code to submit a request for an object, and upon receiving
+// a response, know whether the object is still alive, or has been destroyed
+// because of other reasons. We keep a list of living weak_ptrs in each object,
+// and clear the weak_ptrs when the object is destroyed. This is safe, because
+// we require that both the destructor of the referent and the get method on
+// the weak_ptr are executed on the main thread.
+template <typename T>
+struct enable_weak_from_this;
+
+template <typename T>
+struct weak_ptr {
+    weak_ptr() = default;
+    explicit weak_ptr(T* ptr) { reset(ptr); }
+    weak_ptr(const weak_ptr& copy) { reset(copy.get()); }
+
+    weak_ptr(weak_ptr&& move) {
+        reset(move.get());
+        move.reset();
+    }
+
+    ~weak_ptr() { reset(); }
+
+    weak_ptr& operator=(const weak_ptr& copy) {
+        if (&copy == this) {
+            return *this;
+        }
+
+        reset(copy.get());
+        return *this;
+    }
+
+    weak_ptr& operator=(weak_ptr&& move) {
+        if (&move == this) {
+            return *this;
+        }
+
+        reset(move.get());
+        move.reset();
+        return *this;
+    }
+
+    T* get() {
+        check_main_thread();
+        return ptr_;
+    }
+
+    void reset(T* ptr = nullptr) {
+        check_main_thread();
+
+        if (ptr == ptr_) {
+            return;
+        }
+
+        if (ptr_) {
+            ptr_->weak_ptrs_.erase(
+                    std::remove(ptr_->weak_ptrs_.begin(), ptr_->weak_ptrs_.end(), this));
+        }
+
+        ptr_ = ptr;
+        if (ptr_) {
+            ptr_->weak_ptrs_.push_back(this);
+        }
+    }
+
+  private:
+    friend struct enable_weak_from_this<T>;
+    T* ptr_ = nullptr;
+};
+
+template <typename T>
+struct enable_weak_from_this {
+    ~enable_weak_from_this() {
+        if (!weak_ptrs_.empty()) {
+            check_main_thread();
+            for (auto& weak : weak_ptrs_) {
+                weak->ptr_ = nullptr;
+            }
+            weak_ptrs_.clear();
+        }
+    }
+
+    weak_ptr<T> weak() { return weak_ptr<T>(static_cast<T*>(this)); }
+
+    void schedule_deletion() {
+        fdevent_run_on_main_thread([this]() { delete this; });
+    }
+
+  private:
+    friend struct weak_ptr<T>;
+    std::vector<weak_ptr<T>*> weak_ptrs_;
 };
diff --git a/adb/types_test.cpp b/adb/types_test.cpp
index 1fbd2ca..2c99f95 100644
--- a/adb/types_test.cpp
+++ b/adb/types_test.cpp
@@ -19,21 +19,21 @@
 #include <memory>
 #include "types.h"
 
-static std::unique_ptr<IOVector::block_type> create_block(const std::string& string) {
-    return std::make_unique<IOVector::block_type>(string.begin(), string.end());
+static IOVector::block_type create_block(const std::string& string) {
+    return IOVector::block_type(string.begin(), string.end());
 }
 
-static std::unique_ptr<IOVector::block_type> create_block(char value, size_t len) {
-    auto block = std::make_unique<IOVector::block_type>();
-    block->resize(len);
-    memset(&(*block)[0], value, len);
+static IOVector::block_type create_block(char value, size_t len) {
+    auto block = IOVector::block_type();
+    block.resize(len);
+    memset(&(block)[0], value, len);
     return block;
 }
 
 template <typename T>
-static std::unique_ptr<IOVector::block_type> copy_block(T&& block) {
-    auto copy = std::make_unique<IOVector::block_type>();
-    copy->assign(block->begin(), block->end());
+static IOVector::block_type copy_block(const T& block) {
+    auto copy = IOVector::block_type();
+    copy.assign(block.begin(), block.end());
     return copy;
 }
 
@@ -50,7 +50,7 @@
     bc.append(copy_block(block));
     ASSERT_EQ(100ULL, bc.size());
     auto coalesced = bc.coalesce();
-    ASSERT_EQ(*block, coalesced);
+    ASSERT_EQ(block, coalesced);
 }
 
 TEST(IOVector, single_block_split) {
@@ -60,8 +60,8 @@
     IOVector foo = bc.take_front(3);
     ASSERT_EQ(3ULL, foo.size());
     ASSERT_EQ(3ULL, bc.size());
-    ASSERT_EQ(*create_block("foo"), foo.coalesce());
-    ASSERT_EQ(*create_block("bar"), bc.coalesce());
+    ASSERT_EQ(create_block("foo"), foo.coalesce());
+    ASSERT_EQ(create_block("bar"), bc.coalesce());
 }
 
 TEST(IOVector, aligned_split) {
@@ -73,15 +73,15 @@
 
     IOVector foo = bc.take_front(3);
     ASSERT_EQ(3ULL, foo.size());
-    ASSERT_EQ(*create_block("foo"), foo.coalesce());
+    ASSERT_EQ(create_block("foo"), foo.coalesce());
 
     IOVector bar = bc.take_front(3);
     ASSERT_EQ(3ULL, bar.size());
-    ASSERT_EQ(*create_block("bar"), bar.coalesce());
+    ASSERT_EQ(create_block("bar"), bar.coalesce());
 
     IOVector baz = bc.take_front(3);
     ASSERT_EQ(3ULL, baz.size());
-    ASSERT_EQ(*create_block("baz"), baz.coalesce());
+    ASSERT_EQ(create_block("baz"), baz.coalesce());
 
     ASSERT_EQ(0ULL, bc.size());
 }
@@ -97,23 +97,23 @@
     // Aligned left, misaligned right, across multiple blocks.
     IOVector foob = bc.take_front(4);
     ASSERT_EQ(4ULL, foob.size());
-    ASSERT_EQ(*create_block("foob"), foob.coalesce());
+    ASSERT_EQ(create_block("foob"), foob.coalesce());
 
     // Misaligned left, misaligned right, in one block.
     IOVector a = bc.take_front(1);
     ASSERT_EQ(1ULL, a.size());
-    ASSERT_EQ(*create_block("a"), a.coalesce());
+    ASSERT_EQ(create_block("a"), a.coalesce());
 
     // Misaligned left, misaligned right, across two blocks.
     IOVector rba = bc.take_front(3);
     ASSERT_EQ(3ULL, rba.size());
-    ASSERT_EQ(*create_block("rba"), rba.coalesce());
+    ASSERT_EQ(create_block("rba"), rba.coalesce());
 
     // Misaligned left, misaligned right, across three blocks.
     IOVector zquxquu = bc.take_front(7);
     ASSERT_EQ(7ULL, zquxquu.size());
-    ASSERT_EQ(*create_block("zquxquu"), zquxquu.coalesce());
+    ASSERT_EQ(create_block("zquxquu"), zquxquu.coalesce());
 
     ASSERT_EQ(1ULL, bc.size());
-    ASSERT_EQ(*create_block("x"), bc.coalesce());
+    ASSERT_EQ(create_block("x"), bc.coalesce());
 }
diff --git a/base/Android.bp b/base/Android.bp
index f5000c1..a32959b 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -33,6 +33,7 @@
 cc_library_headers {
     name: "libbase_headers",
     vendor_available: true,
+    ramdisk_available: true,
     recovery_available: true,
     host_supported: true,
     native_bridge_supported: true,
@@ -56,18 +57,23 @@
         "chrono_utils.cpp",
         "cmsg.cpp",
         "file.cpp",
+        "liblog_symbols.cpp",
         "logging.cpp",
         "mapped_file.cpp",
+        "parsebool.cpp",
         "parsenetaddress.cpp",
         "process.cpp",
         "properties.cpp",
-        "quick_exit.cpp",
         "stringprintf.cpp",
         "strings.cpp",
         "threads.cpp",
         "test_utils.cpp",
     ],
 
+    static: {
+        cflags: ["-DNO_LIBLOG_DLSYM"],
+    },
+
     cppflags: ["-Wexit-time-destructors"],
     shared_libs: ["liblog"],
     target: {
@@ -107,6 +113,7 @@
     name: "libbase",
     defaults: ["libbase_defaults"],
     vendor_available: true,
+    ramdisk_available: true,
     recovery_available: true,
     host_supported: true,
     native_bridge_supported: true,
@@ -149,12 +156,13 @@
         "logging_test.cpp",
         "macros_test.cpp",
         "mapped_file_test.cpp",
+        "no_destructor_test.cpp",
         "parsedouble_test.cpp",
+        "parsebool_test.cpp",
         "parseint_test.cpp",
         "parsenetaddress_test.cpp",
         "process_test.cpp",
         "properties_test.cpp",
-        "quick_exit_test.cpp",
         "result_test.cpp",
         "scopeguard_test.cpp",
         "stringprintf_test.cpp",
diff --git a/base/README.md b/base/README.md
new file mode 100644
index 0000000..2ef5c10
--- /dev/null
+++ b/base/README.md
@@ -0,0 +1,42 @@
+# libbase
+
+## Who is this library for?
+
+This library is a collection of convenience functions to make common tasks
+easier and less error-prone.
+
+In this context, "error-prone" covers both "hard to do correctly" and
+"hard to do with good performance", but as a general purpose library,
+libbase's primary focus is on making it easier to do things easily and
+correctly when a compromise has to be made between "simplest API" on the
+one hand and "fastest implementation" on the other. Though obviously
+the ideal is to have both.
+
+## Should my routine be added?
+
+The intention is to cover the 80% use cases, not be all things to all users.
+
+If you have a routine that's really useful in your project,
+congratulations. But that doesn't mean it should be here rather than
+just in your project.
+
+The question for libbase is "should everyone be doing this?"/"does this
+make everyone's code cleaner/safer?". Historically we've considered the
+bar for inclusion to be "are there at least three *unrelated* projects
+that would be cleaned up by doing so".
+
+If your routine is actually something from a future C++ standard (that
+isn't yet in libc++), or it's widely used in another library, that helps
+show that there's precedent. Being able to say "so-and-so has used this
+API for n years" is a good way to reduce concerns about API choices.
+
+## Any other restrictions?
+
+Unlike most Android code, code in libbase has to build for Mac and
+Windows too.
+
+Code here is also expected to have good test coverage.
+
+By its nature, it's difficult to change libbase API. It's often best
+to start using your routine just in your project, and let it "graduate"
+after you're certain that the API is solid.
diff --git a/base/expected_test.cpp b/base/expected_test.cpp
index a74bc1d..47e396a 100644
--- a/base/expected_test.cpp
+++ b/base/expected_test.cpp
@@ -408,11 +408,11 @@
 
 TEST(Expected, testTest) {
   exp_int e = 10;
-  EXPECT_TRUE(e);
+  EXPECT_TRUE(e.ok());
   EXPECT_TRUE(e.has_value());
 
   exp_int e2 = unexpected(10);
-  EXPECT_FALSE(e2);
+  EXPECT_FALSE(e2.ok());
   EXPECT_FALSE(e2.has_value());
 }
 
@@ -499,24 +499,6 @@
   EXPECT_TRUE(e4 != e3);
 }
 
-TEST(Expected, testCompareWithSameValue) {
-  exp_int e = 10;
-  int value = 10;
-  EXPECT_TRUE(e == value);
-  EXPECT_TRUE(value == e);
-  EXPECT_FALSE(e != value);
-  EXPECT_FALSE(value != e);
-}
-
-TEST(Expected, testCompareWithDifferentValue) {
-  exp_int e = 10;
-  int value = 20;
-  EXPECT_FALSE(e == value);
-  EXPECT_FALSE(value == e);
-  EXPECT_TRUE(e != value);
-  EXPECT_TRUE(value != e);
-}
-
 TEST(Expected, testCompareWithSameError) {
   exp_int e = unexpected(10);
   exp_int::unexpected_type error = 10;
@@ -589,12 +571,12 @@
     }
   };
 
-  EXPECT_FALSE(divide(10, 0));
+  EXPECT_FALSE(divide(10, 0).ok());
   EXPECT_EQ("divide by zero", divide(10, 0).error().message);
   EXPECT_EQ(-1, divide(10, 0).error().cause);
 
-  EXPECT_TRUE(divide(10, 3));
-  EXPECT_EQ(QR(3, 1), divide(10, 3));
+  EXPECT_TRUE(divide(10, 3).ok());
+  EXPECT_EQ(QR(3, 1), *divide(10, 3));
 }
 
 TEST(Expected, testPair) {
@@ -607,7 +589,7 @@
   };
 
   auto r = test(true);
-  EXPECT_TRUE(r);
+  EXPECT_TRUE(r.ok());
   EXPECT_EQ("yes", r->first);
 }
 
@@ -621,9 +603,9 @@
   };
 
   auto r = test(true);
-  EXPECT_TRUE(r);
+  EXPECT_TRUE(r.ok());
   r = test(false);
-  EXPECT_FALSE(r);
+  EXPECT_FALSE(r.ok());
   EXPECT_EQ(10, r.error());
 }
 
@@ -772,7 +754,7 @@
 
   ConstructorTracker::Reset();
   auto result1 = test("");
-  ASSERT_TRUE(result1);
+  ASSERT_TRUE(result1.ok());
   EXPECT_EQ("literal string", result1->string);
   EXPECT_EQ(1U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -782,7 +764,7 @@
 
   ConstructorTracker::Reset();
   auto result2 = test("test2");
-  ASSERT_TRUE(result2);
+  ASSERT_TRUE(result2.ok());
   EXPECT_EQ("test2test22", result2->string);
   EXPECT_EQ(1U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -792,7 +774,7 @@
 
   ConstructorTracker::Reset();
   auto result3 = test("test3");
-  ASSERT_TRUE(result3);
+  ASSERT_TRUE(result3.ok());
   EXPECT_EQ("test3 test3", result3->string);
   EXPECT_EQ(1U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -804,22 +786,22 @@
 TEST(Expected, testNested) {
   expected<exp_string, std::string> e = "hello";
 
+  EXPECT_TRUE(e.ok());
   EXPECT_TRUE(e.has_value());
   EXPECT_TRUE(e.value().has_value());
-  EXPECT_TRUE(e);
-  EXPECT_TRUE(*e);
+  EXPECT_TRUE(e->ok());
   EXPECT_EQ("hello", e.value().value());
 
   expected<exp_string, std::string> e2 = unexpected("world");
   EXPECT_FALSE(e2.has_value());
-  EXPECT_FALSE(e2);
+  EXPECT_FALSE(e2.ok());
   EXPECT_EQ("world", e2.error());
 
   expected<exp_string, std::string> e3 = exp_string(unexpected("world"));
   EXPECT_TRUE(e3.has_value());
   EXPECT_FALSE(e3.value().has_value());
-  EXPECT_TRUE(e3);
-  EXPECT_FALSE(*e3);
+  EXPECT_TRUE(e3.ok());
+  EXPECT_FALSE(e3->ok());
   EXPECT_EQ("world", e3.value().error());
 }
 
diff --git a/base/include/android-base/errno_restorer.h b/base/include/android-base/errno_restorer.h
new file mode 100644
index 0000000..1c8597c
--- /dev/null
+++ b/base/include/android-base/errno_restorer.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "errno.h"
+
+#include "android-base/macros.h"
+
+namespace android {
+namespace base {
+
+class ErrnoRestorer {
+ public:
+  ErrnoRestorer() : saved_errno_(errno) {}
+
+  ~ErrnoRestorer() { errno = saved_errno_; }
+
+  // Allow this object to be used as part of && operation.
+  operator bool() const { return true; }
+
+ private:
+  const int saved_errno_;
+
+  DISALLOW_COPY_AND_ASSIGN(ErrnoRestorer);
+};
+
+}  // namespace base
+}  // namespace android
diff --git a/base/include/android-base/expected.h b/base/include/android-base/expected.h
index 030ef35e..9603bb1 100644
--- a/base/include/android-base/expected.h
+++ b/base/include/android-base/expected.h
@@ -111,6 +111,7 @@
     !(!std::is_convertible_v<const U&, T> ||
      !std::is_convertible_v<const G&, E>) /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(const expected<U, G>& rhs) {
     if (rhs.has_value()) var_ = rhs.value();
     else var_ = unexpected(rhs.error());
@@ -149,6 +150,7 @@
     !(!std::is_convertible_v<const U&, T> ||
      !std::is_convertible_v<const G&, E>) /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(expected<U, G>&& rhs) {
     if (rhs.has_value()) var_ = std::move(rhs.value());
     else var_ = unexpected(std::move(rhs.error()));
@@ -180,6 +182,7 @@
                 !std::is_same_v<unexpected<E>, std::remove_cv_t<std::remove_reference_t<U>>> &&
                 std::is_convertible_v<U&&, T> /* non-explicit */
                 )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(U&& v) : var_(std::in_place_index<0>, std::forward<U>(v)) {}
 
   template <class U = T _ENABLE_IF(
@@ -195,6 +198,7 @@
     std::is_constructible_v<E, const G&> &&
     std::is_convertible_v<const G&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(const unexpected<G>& e)
   : var_(std::in_place_index<1>, e.value()) {}
 
@@ -209,6 +213,7 @@
     std::is_constructible_v<E, G&&> &&
     std::is_convertible_v<G&&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(unexpected<G>&& e)
   : var_(std::in_place_index<1>, std::move(e.value())) {}
 
@@ -326,6 +331,7 @@
 
   constexpr explicit operator bool() const noexcept { return has_value(); }
   constexpr bool has_value() const noexcept { return var_.index() == 0; }
+  constexpr bool ok() const noexcept { return has_value(); }
 
   constexpr const T& value() const& { return std::get<T>(var_); }
   constexpr T& value() & { return std::get<T>(var_); }
@@ -361,16 +367,6 @@
   template<class T1, class E1, class T2, class E2>
   friend constexpr bool operator!=(const expected<T1, E1>& x, const expected<T2, E2>& y);
 
-  // comparison with T
-  template<class T1, class E1, class T2>
-  friend constexpr bool operator==(const expected<T1, E1>&, const T2&);
-  template<class T1, class E1, class T2>
-  friend constexpr bool operator==(const T2&, const expected<T1, E1>&);
-  template<class T1, class E1, class T2>
-  friend constexpr bool operator!=(const expected<T1, E1>&, const T2&);
-  template<class T1, class E1, class T2>
-  friend constexpr bool operator!=(const T2&, const expected<T1, E1>&);
-
   // Comparison with unexpected<E>
   template<class T1, class E1, class E2>
   friend constexpr bool operator==(const expected<T1, E1>&, const unexpected<E2>&);
@@ -405,24 +401,6 @@
   return !(x == y);
 }
 
-// comparison with T
-template<class T1, class E1, class T2>
-constexpr bool operator==(const expected<T1, E1>& x, const T2& y) {
-  return x.has_value() && (*x == y);
-}
-template<class T1, class E1, class T2>
-constexpr bool operator==(const T2& x, const expected<T1, E1>& y) {
-  return y.has_value() && (x == *y);
-}
-template<class T1, class E1, class T2>
-constexpr bool operator!=(const expected<T1, E1>& x, const T2& y) {
-  return !x.has_value() || (*x != y);
-}
-template<class T1, class E1, class T2>
-constexpr bool operator!=(const T2& x, const expected<T1, E1>& y) {
-  return !y.has_value() || (x != *y);
-}
-
 // Comparison with unexpected<E>
 template<class T1, class E1, class E2>
 constexpr bool operator==(const expected<T1, E1>& x, const unexpected<E2>& y) {
@@ -457,6 +435,7 @@
     std::is_void_v<U> &&
     std::is_convertible_v<const G&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(const expected<U, G>& rhs) {
     if (!rhs.has_value()) var_ = unexpected(rhs.error());
   }
@@ -473,6 +452,7 @@
     std::is_void_v<U> &&
     std::is_convertible_v<const G&&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(expected<U, G>&& rhs) {
     if (!rhs.has_value()) var_ = unexpected(std::move(rhs.error()));
   }
@@ -489,6 +469,7 @@
     std::is_constructible_v<E, const G&> &&
     std::is_convertible_v<const G&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(const unexpected<G>& e)
   : var_(std::in_place_index<1>, e.value()) {}
 
@@ -503,6 +484,7 @@
     std::is_constructible_v<E, G&&> &&
     std::is_convertible_v<G&&, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr expected(unexpected<G>&& e)
   : var_(std::in_place_index<1>, std::move(e.value())) {}
 
@@ -576,6 +558,7 @@
   // observers
   constexpr explicit operator bool() const noexcept { return has_value(); }
   constexpr bool has_value() const noexcept { return var_.index() == 0; }
+  constexpr bool ok() const noexcept { return has_value(); }
 
   constexpr void value() const& { if (!has_value()) std::get<0>(var_); }
 
@@ -640,6 +623,7 @@
                 std::is_constructible_v<E, Err> &&
                 !std::is_same_v<std::remove_cv_t<std::remove_reference_t<E>>, std::in_place_t> &&
                 !std::is_same_v<std::remove_cv_t<std::remove_reference_t<E>>, unexpected>)>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr unexpected(Err&& e) : val_(std::forward<Err>(e)) {}
 
   template<class U, class... Args _ENABLE_IF(
@@ -660,6 +644,7 @@
     !std::is_convertible_v<const unexpected<Err>, E> &&
     std::is_convertible_v<Err, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr unexpected(const unexpected<Err>& rhs)
   : val_(rhs.value()) {}
 
@@ -690,6 +675,7 @@
     !std::is_convertible_v<const unexpected<Err>, E> &&
     std::is_convertible_v<Err, E> /* non-explicit */
   )>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   constexpr unexpected(unexpected<Err>&& rhs)
   : val_(std::move(rhs.value())) {}
 
diff --git a/base/include/android-base/logging.h b/base/include/android-base/logging.h
index ab6476c..accc225 100644
--- a/base/include/android-base/logging.h
+++ b/base/include/android-base/logging.h
@@ -64,6 +64,7 @@
 #include <memory>
 #include <ostream>
 
+#include "android-base/errno_restorer.h"
 #include "android-base/macros.h"
 
 // Note: DO NOT USE DIRECTLY. Use LOG_TAG instead.
@@ -85,7 +86,7 @@
   INFO,
   WARNING,
   ERROR,
-  FATAL_WITHOUT_ABORT,
+  FATAL_WITHOUT_ABORT,  // For loggability tests, this is considered identical to FATAL.
   FATAL,
 };
 
@@ -93,6 +94,8 @@
   DEFAULT,
   MAIN,
   SYSTEM,
+  RADIO,
+  CRASH,
 };
 
 using LogFunction = std::function<void(LogId, LogSeverity, const char*, const char*,
@@ -113,10 +116,8 @@
 
 void DefaultAborter(const char* abort_message);
 
-std::string GetDefaultTag();
 void SetDefaultTag(const std::string& tag);
 
-#ifdef __ANDROID__
 // We expose this even though it is the default because a user that wants to
 // override the default log buffer will have to construct this themselves.
 class LogdLogger {
@@ -129,7 +130,6 @@
  private:
   LogId default_log_id_;
 };
-#endif
 
 // Configure logging based on ANDROID_LOG_TAGS environment variable.
 // We need to parse a string that looks like
@@ -155,27 +155,6 @@
 // Replace the current aborter.
 void SetAborter(AbortFunction&& aborter);
 
-class ErrnoRestorer {
- public:
-  ErrnoRestorer()
-      : saved_errno_(errno) {
-  }
-
-  ~ErrnoRestorer() {
-    errno = saved_errno_;
-  }
-
-  // Allow this object to be used as part of && operation.
-  operator bool() const {
-    return true;
-  }
-
- private:
-  const int saved_errno_;
-
-  DISALLOW_COPY_AND_ASSIGN(ErrnoRestorer);
-};
-
 // A helper macro that produces an expression that accepts both a qualified name and an
 // unqualified name for a LogSeverity, and returns a LogSeverity value.
 // Note: DO NOT USE DIRECTLY. This is an implementation detail.
@@ -211,8 +190,8 @@
 #define ABORT_AFTER_LOG_FATAL_EXPR(x) ABORT_AFTER_LOG_EXPR_IF(true, x)
 
 // Defines whether the given severity will be logged or silently swallowed.
-#define WOULD_LOG(severity) \
-  (UNLIKELY((SEVERITY_LAMBDA(severity)) >= ::android::base::GetMinimumLogSeverity()) || \
+#define WOULD_LOG(severity)                                                              \
+  (UNLIKELY(::android::base::ShouldLog(SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL)) || \
    MUST_LOG_MESSAGE(severity))
 
 // Get an ostream that can be used for logging at the given severity and to the default
@@ -222,20 +201,16 @@
 // 1) This will not check whether the severity is high enough. One should use WOULD_LOG to filter
 //    usage manually.
 // 2) This does not save and restore errno.
-#define LOG_STREAM(severity) LOG_STREAM_TO(DEFAULT, severity)
-
-// Get an ostream that can be used for logging at the given severity and to the
-// given destination. The same notes as for LOG_STREAM apply.
-#define LOG_STREAM_TO(dest, severity)                                           \
-  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest,        \
-                              SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, -1) \
+#define LOG_STREAM(severity)                                                                    \
+  ::android::base::LogMessage(__FILE__, __LINE__, SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, \
+                              -1)                                                               \
       .stream()
 
 // Logs a message to logcat on Android otherwise to stderr. If the severity is
 // FATAL it also causes an abort. For example:
 //
 //     LOG(FATAL) << "We didn't expect to reach here";
-#define LOG(severity) LOG_TO(DEFAULT, severity)
+#define LOG(severity) LOGGING_PREAMBLE(severity) && LOG_STREAM(severity)
 
 // Checks if we want to log something, and sets up appropriate RAII objects if
 // so.
@@ -245,21 +220,12 @@
    ABORT_AFTER_LOG_EXPR_IF((SEVERITY_LAMBDA(severity)) == ::android::base::FATAL, true) && \
    ::android::base::ErrnoRestorer())
 
-// Logs a message to logcat with the specified log ID on Android otherwise to
-// stderr. If the severity is FATAL it also causes an abort.
-// Use an expression here so we can support the << operator following the macro,
-// like "LOG(DEBUG) << xxx;".
-#define LOG_TO(dest, severity) LOGGING_PREAMBLE(severity) && LOG_STREAM_TO(dest, severity)
-
 // A variant of LOG that also logs the current errno value. To be used when
 // library calls fail.
-#define PLOG(severity) PLOG_TO(DEFAULT, severity)
-
-// Behaves like PLOG, but logs to the specified log ID.
-#define PLOG_TO(dest, severity)                                                        \
-  LOGGING_PREAMBLE(severity) &&                                                        \
-      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest,           \
-                                  SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, errno) \
+#define PLOG(severity)                                                           \
+  LOGGING_PREAMBLE(severity) &&                                                  \
+      ::android::base::LogMessage(__FILE__, __LINE__, SEVERITY_LAMBDA(severity), \
+                                  _LOG_TAG_INTERNAL, errno)                      \
           .stream()
 
 // Marker that code is yet to be implemented.
@@ -272,24 +238,23 @@
 //
 //     CHECK(false == true) results in a log message of
 //       "Check failed: false == true".
-#define CHECK(x)                                                                 \
-  LIKELY((x)) || ABORT_AFTER_LOG_FATAL_EXPR(false) ||                            \
-      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,  \
-                                  ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
-              .stream()                                                          \
+#define CHECK(x)                                                                                 \
+  LIKELY((x)) || ABORT_AFTER_LOG_FATAL_EXPR(false) ||                                            \
+      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, _LOG_TAG_INTERNAL, \
+                                  -1)                                                            \
+              .stream()                                                                          \
           << "Check failed: " #x << " "
 
 // clang-format off
 // Helper for CHECK_xx(x,y) macros.
-#define CHECK_OP(LHS, RHS, OP)                                                                 \
-  for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS);                           \
-       UNLIKELY(!(_values.lhs OP _values.rhs));                                                \
-       /* empty */)                                                                            \
-  ABORT_AFTER_LOG_FATAL                                                                        \
-  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,                    \
-                              ::android::base::FATAL, _LOG_TAG_INTERNAL, -1)                   \
-          .stream()                                                                            \
-      << "Check failed: " << #LHS << " " << #OP << " " << #RHS << " (" #LHS "=" << _values.lhs \
+#define CHECK_OP(LHS, RHS, OP)                                                                   \
+  for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS);                             \
+       UNLIKELY(!(_values.lhs OP _values.rhs));                                                  \
+       /* empty */)                                                                              \
+  ABORT_AFTER_LOG_FATAL                                                                          \
+  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
+          .stream()                                                                              \
+      << "Check failed: " << #LHS << " " << #OP << " " << #RHS << " (" #LHS "=" << _values.lhs   \
       << ", " #RHS "=" << _values.rhs << ") "
 // clang-format on
 
@@ -311,8 +276,8 @@
 #define CHECK_STROP(s1, s2, sense)                                             \
   while (UNLIKELY((strcmp(s1, s2) == 0) != (sense)))                           \
     ABORT_AFTER_LOG_FATAL                                                      \
-    ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,  \
-                                ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
+    ::android::base::LogMessage(__FILE__, __LINE__,  ::android::base::FATAL,   \
+                                 _LOG_TAG_INTERNAL, -1)                        \
         .stream()                                                              \
         << "Check failed: " << "\"" << (s1) << "\""                            \
         << ((sense) ? " == " : " != ") << "\"" << (s2) << "\""
@@ -431,8 +396,10 @@
 // of a CHECK. The destructor will abort if the severity is FATAL.
 class LogMessage {
  public:
-  LogMessage(const char* file, unsigned int line, LogId id, LogSeverity severity, const char* tag,
+  // LogId has been deprecated, but this constructor must exist for prebuilts.
+  LogMessage(const char* file, unsigned int line, LogId, LogSeverity severity, const char* tag,
              int error);
+  LogMessage(const char* file, unsigned int line, LogSeverity severity, const char* tag, int error);
 
   ~LogMessage();
 
@@ -441,8 +408,8 @@
   std::ostream& stream();
 
   // The routine that performs the actual logging.
-  static void LogLine(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                      const char* tag, const char* msg);
+  static void LogLine(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                      const char* msg);
 
  private:
   const std::unique_ptr<LogMessageData> data_;
@@ -456,6 +423,9 @@
 // Set the minimum severity level for logging, returning the old severity.
 LogSeverity SetMinimumLogSeverity(LogSeverity new_severity);
 
+// Return whether or not a log message with the associated tag should be logged.
+bool ShouldLog(LogSeverity severity, const char* tag);
+
 // Allows to temporarily change the minimum severity level for logging.
 class ScopedLogSeverity {
  public:
@@ -474,9 +444,6 @@
 // Emit a warning of ostream<< with std::string*. The intention was most likely to print *string.
 //
 // Note: for this to work, we need to have this in a namespace.
-// Note: lots of ifdef magic to make this work with Clang (platform) vs GCC (windows tools)
-// Note: using diagnose_if(true) under Clang and nothing under GCC/mingw as there is no common
-//       attribute support.
 // Note: using a pragma because "-Wgcc-compat" (included in "-Weverything") complains about
 //       diagnose_if.
 // Note: to print the pointer, use "<< static_cast<const void*>(string_pointer)" instead.
@@ -486,8 +453,8 @@
 #pragma clang diagnostic ignored "-Wgcc-compat"
 #define OSTREAM_STRING_POINTER_USAGE_WARNING \
     __attribute__((diagnose_if(true, "Unexpected logging of string pointer", "warning")))
-inline std::ostream& operator<<(std::ostream& stream, const std::string* string_pointer)
-    OSTREAM_STRING_POINTER_USAGE_WARNING {
+inline OSTREAM_STRING_POINTER_USAGE_WARNING
+std::ostream& operator<<(std::ostream& stream, const std::string* string_pointer) {
   return stream << static_cast<const void*>(string_pointer);
 }
 #pragma clang diagnostic pop
diff --git a/base/include/android-base/mapped_file.h b/base/include/android-base/mapped_file.h
index 6a19f1b..8c37f43 100644
--- a/base/include/android-base/mapped_file.h
+++ b/base/include/android-base/mapped_file.h
@@ -53,7 +53,8 @@
   /**
    * Same thing, but using the raw OS file handle instead of a CRT wrapper.
    */
-  static MappedFile FromOsHandle(os_handle h, off64_t offset, size_t length, int prot);
+  static std::unique_ptr<MappedFile> FromOsHandle(os_handle h, off64_t offset, size_t length,
+                                                  int prot);
 
   /**
    * Removes the mapping.
@@ -69,10 +70,6 @@
   char* data() const { return base_ + offset_; }
   size_t size() const { return size_; }
 
-  bool isValid() const { return base_ != nullptr; }
-
-  explicit operator bool() const { return isValid(); }
-
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(MappedFile);
 
diff --git a/base/include/android-base/no_destructor.h b/base/include/android-base/no_destructor.h
new file mode 100644
index 0000000..ce0dc9f
--- /dev/null
+++ b/base/include/android-base/no_destructor.h
@@ -0,0 +1,94 @@
+#pragma once
+
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <utility>
+
+#include "android-base/macros.h"
+
+namespace android {
+namespace base {
+
+// A wrapper that makes it easy to create an object of type T with static
+// storage duration that:
+// - is only constructed on first access
+// - never invokes the destructor
+// in order to satisfy the styleguide ban on global constructors and
+// destructors.
+//
+// Runtime constant example:
+// const std::string& GetLineSeparator() {
+//  // Forwards to std::string(size_t, char, const Allocator&) constructor.
+//   static const base::NoDestructor<std::string> s(5, '-');
+//   return *s;
+// }
+//
+// More complex initialization with a lambda:
+// const std::string& GetSessionNonce() {
+//   static const base::NoDestructor<std::string> nonce([] {
+//     std::string s(16);
+//     crypto::RandString(s.data(), s.size());
+//     return s;
+//   }());
+//   return *nonce;
+// }
+//
+// NoDestructor<T> stores the object inline, so it also avoids a pointer
+// indirection and a malloc. Also note that since C++11 static local variable
+// initialization is thread-safe and so is this pattern. Code should prefer to
+// use NoDestructor<T> over:
+// - A function scoped static T* or T& that is dynamically initialized.
+// - A global base::LazyInstance<T>.
+//
+// Note that since the destructor is never run, this *will* leak memory if used
+// as a stack or member variable. Furthermore, a NoDestructor<T> should never
+// have global scope as that may require a static initializer.
+template <typename T>
+class NoDestructor {
+ public:
+  // Not constexpr; just write static constexpr T x = ...; if the value should
+  // be a constexpr.
+  template <typename... Args>
+  explicit NoDestructor(Args&&... args) {
+    new (storage_) T(std::forward<Args>(args)...);
+  }
+
+  // Allows copy and move construction of the contained type, to allow
+  // construction from an initializer list, e.g. for std::vector.
+  explicit NoDestructor(const T& x) { new (storage_) T(x); }
+  explicit NoDestructor(T&& x) { new (storage_) T(std::move(x)); }
+
+  NoDestructor(const NoDestructor&) = delete;
+  NoDestructor& operator=(const NoDestructor&) = delete;
+
+  ~NoDestructor() = default;
+
+  const T& operator*() const { return *get(); }
+  T& operator*() { return *get(); }
+
+  const T* operator->() const { return get(); }
+  T* operator->() { return get(); }
+
+  const T* get() const { return reinterpret_cast<const T*>(storage_); }
+  T* get() { return reinterpret_cast<T*>(storage_); }
+
+ private:
+  alignas(T) char storage_[sizeof(T)];
+};
+
+}  // namespace base
+}  // namespace android
diff --git a/base/include/android-base/parsebool.h b/base/include/android-base/parsebool.h
new file mode 100644
index 0000000..b2bd021
--- /dev/null
+++ b/base/include/android-base/parsebool.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <string_view>
+
+namespace android {
+namespace base {
+
+// Parse the given string as yes or no inactivation of some sort. Return one of the
+// ParseBoolResult enumeration values.
+//
+// The following values parse as true:
+//
+//   1
+//   on
+//   true
+//   y
+//   yes
+//
+//
+// The following values parse as false:
+//
+//   0
+//   false
+//   n
+//   no
+//   off
+//
+// Anything else is a parse error.
+//
+// The purpose of this function is to have a single canonical parser for yes-or-no indications
+// throughout the system.
+
+enum class ParseBoolResult {
+  kError,
+  kFalse,
+  kTrue,
+};
+
+ParseBoolResult ParseBool(std::string_view s);
+
+}  // namespace base
+}  // namespace android
diff --git a/base/include/android-base/quick_exit.h b/base/include/android-base/quick_exit.h
deleted file mode 100644
index a03b14f..0000000
--- a/base/include/android-base/quick_exit.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <stdlib.h>
-
-// Provide emulation for at_quick_exit/quick_exit on platforms that don't have it.
-namespace android {
-namespace base {
-
-// Bionic and glibc have quick_exit, Darwin and Windows don't.
-#if !defined(__linux__)
-  void quick_exit(int exit_code) __attribute__((noreturn));
-  int at_quick_exit(void (*func)());
-#else
-  using ::at_quick_exit;
-  using ::quick_exit;
-#endif
-}
-}
diff --git a/base/include/android-base/result.h b/base/include/android-base/result.h
index 1b763af..4a59552 100644
--- a/base/include/android-base/result.h
+++ b/base/include/android-base/result.h
@@ -90,6 +90,7 @@
   ResultError(T&& message, int code) : message_(std::forward<T>(message)), code_(code) {}
 
   template <typename T>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   operator android::base::expected<T, ResultError>() {
     return android::base::unexpected(ResultError(message_, code_));
   }
@@ -118,9 +119,11 @@
 class Error {
  public:
   Error() : errno_(0), append_errno_(false) {}
+  // NOLINTNEXTLINE(google-explicit-constructor)
   Error(int errno_to_append) : errno_(errno_to_append), append_errno_(true) {}
 
   template <typename T>
+  // NOLINTNEXTLINE(google-explicit-constructor)
   operator android::base::expected<T, ResultError>() {
     return android::base::unexpected(ResultError(str(), errno_));
   }
@@ -153,11 +156,11 @@
   Error& operator=(const Error&) = delete;
   Error& operator=(Error&&) = delete;
 
-  template <typename... Args>
-  friend Error Errorf(const char* fmt, const Args&... args);
+  template <typename T, typename... Args>
+  friend Error ErrorfImpl(const T&& fmt, const Args&... args);
 
-  template <typename... Args>
-  friend Error ErrnoErrorf(const char* fmt, const Args&... args);
+  template <typename T, typename... Args>
+  friend Error ErrnoErrorfImpl(const T&& fmt, const Args&... args);
 
  private:
   Error(bool append_errno, int errno_to_append, const std::string& message)
@@ -188,18 +191,49 @@
   return ErrorCode(code, args...);
 }
 
-template <typename... Args>
-inline Error Errorf(const char* fmt, const Args&... args) {
+// TODO(tomcherry): Remove this once we've removed all `using android::base::Errorf` and `using
+// android::base::ErrnoErrorf` lines.
+enum Errorf {};
+enum ErrnoErrorf {};
+
+template <typename T, typename... Args>
+inline Error ErrorfImpl(const T&& fmt, const Args&... args) {
   return Error(false, ErrorCode(0, args...), fmt::format(fmt, args...));
 }
 
-template <typename... Args>
-inline Error ErrnoErrorf(const char* fmt, const Args&... args) {
+template <typename T, typename... Args>
+inline Error ErrnoErrorfImpl(const T&& fmt, const Args&... args) {
   return Error(true, errno, fmt::format(fmt, args...));
 }
 
+#define Errorf(fmt, ...) android::base::ErrorfImpl(FMT_STRING(fmt), ##__VA_ARGS__)
+#define ErrnoErrorf(fmt, ...) android::base::ErrnoErrorfImpl(FMT_STRING(fmt), ##__VA_ARGS__)
+
 template <typename T>
 using Result = android::base::expected<T, ResultError>;
 
+// Macros for testing the results of functions that return android::base::Result.
+// These also work with base::android::expected.
+
+#define CHECK_RESULT_OK(stmt)       \
+  do {                              \
+    const auto& tmp = (stmt);       \
+    CHECK(tmp.ok()) << tmp.error(); \
+  } while (0)
+
+#define ASSERT_RESULT_OK(stmt)            \
+  do {                                    \
+    const auto& tmp = (stmt);             \
+    ASSERT_TRUE(tmp.ok()) << tmp.error(); \
+  } while (0)
+
+#define EXPECT_RESULT_OK(stmt)            \
+  do {                                    \
+    auto tmp = (stmt);                    \
+    EXPECT_TRUE(tmp.ok()) << tmp.error(); \
+  } while (0)
+
+// TODO: Maybe add RETURN_IF_ERROR() and ASSIGN_OR_RETURN()
+
 }  // namespace base
 }  // namespace android
diff --git a/base/include/android-base/strings.h b/base/include/android-base/strings.h
index b1c22c9..14d534a 100644
--- a/base/include/android-base/strings.h
+++ b/base/include/android-base/strings.h
@@ -85,5 +85,10 @@
   return true;
 }
 
+// Replaces `from` with `to` in `s`, once if `all == false`, or as many times as
+// there are matches if `all == true`.
+[[nodiscard]] std::string StringReplace(std::string_view s, std::string_view from,
+                                        std::string_view to, bool all);
+
 }  // namespace base
 }  // namespace android
diff --git a/base/include/android-base/test_utils.h b/base/include/android-base/test_utils.h
index b20f278..f3d7cb0 100644
--- a/base/include/android-base/test_utils.h
+++ b/base/include/android-base/test_utils.h
@@ -53,30 +53,34 @@
   CapturedStdout() : CapturedStdFd(STDOUT_FILENO) {}
 };
 
-#define ASSERT_MATCH(str, pattern)                                             \
-  do {                                                                         \
-    if (!std::regex_search((str), std::regex((pattern)))) {                    \
-      FAIL() << "regex mismatch: expected " << (pattern) << " in:\n" << (str); \
-    }                                                                          \
+#define ASSERT_MATCH(str, pattern)                                           \
+  do {                                                                       \
+    auto __s = (str);                                                        \
+    if (!std::regex_search(__s, std::regex((pattern)))) {                    \
+      FAIL() << "regex mismatch: expected " << (pattern) << " in:\n" << __s; \
+    }                                                                        \
   } while (0)
 
-#define ASSERT_NOT_MATCH(str, pattern)                                                     \
-  do {                                                                                     \
-    if (std::regex_search((str), std::regex((pattern)))) {                                 \
-      FAIL() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << (str); \
-    }                                                                                      \
+#define ASSERT_NOT_MATCH(str, pattern)                                                   \
+  do {                                                                                   \
+    auto __s = (str);                                                                    \
+    if (std::regex_search(__s, std::regex((pattern)))) {                                 \
+      FAIL() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << __s; \
+    }                                                                                    \
   } while (0)
 
-#define EXPECT_MATCH(str, pattern)                                                    \
-  do {                                                                                \
-    if (!std::regex_search((str), std::regex((pattern)))) {                           \
-      ADD_FAILURE() << "regex mismatch: expected " << (pattern) << " in:\n" << (str); \
-    }                                                                                 \
+#define EXPECT_MATCH(str, pattern)                                                  \
+  do {                                                                              \
+    auto __s = (str);                                                               \
+    if (!std::regex_search(__s, std::regex((pattern)))) {                           \
+      ADD_FAILURE() << "regex mismatch: expected " << (pattern) << " in:\n" << __s; \
+    }                                                                               \
   } while (0)
 
-#define EXPECT_NOT_MATCH(str, pattern)                                                            \
-  do {                                                                                            \
-    if (std::regex_search((str), std::regex((pattern)))) {                                        \
-      ADD_FAILURE() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << (str); \
-    }                                                                                             \
+#define EXPECT_NOT_MATCH(str, pattern)                                                          \
+  do {                                                                                          \
+    auto __s = (str);                                                                           \
+    if (std::regex_search(__s, std::regex((pattern)))) {                                        \
+      ADD_FAILURE() << "regex mismatch: expected to not find " << (pattern) << " in:\n" << __s; \
+    }                                                                                           \
   } while (0)
diff --git a/base/include/android-base/unique_fd.h b/base/include/android-base/unique_fd.h
index 1605daf..c4a0aad 100644
--- a/base/include/android-base/unique_fd.h
+++ b/base/include/android-base/unique_fd.h
@@ -116,6 +116,8 @@
   bool operator<(int rhs) const { return get() < rhs; }
   bool operator==(int rhs) const { return get() == rhs; }
   bool operator!=(int rhs) const { return get() != rhs; }
+  bool operator==(const unique_fd_impl& rhs) const { return get() == rhs.get(); }
+  bool operator!=(const unique_fd_impl& rhs) const { return get() != rhs.get(); }
 
   // Catch bogus error checks (i.e.: "!fd" instead of "fd != -1").
   bool operator!() const = delete;
diff --git a/base/liblog_symbols.cpp b/base/liblog_symbols.cpp
new file mode 100644
index 0000000..d5dfcd2
--- /dev/null
+++ b/base/liblog_symbols.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "liblog_symbols.h"
+
+#if defined(__ANDROID__) && !defined(NO_LIBLOG_DLSYM)
+#include <dlfcn.h>
+#endif
+
+namespace android {
+namespace base {
+
+#if defined(__ANDROID__) && !defined(NO_LIBLOG_DLSYM)
+
+const std::optional<LibLogFunctions>& GetLibLogFunctions() {
+  static std::optional<LibLogFunctions> liblog_functions = []() -> std::optional<LibLogFunctions> {
+    void* liblog_handle = dlopen("liblog.so", RTLD_NOW);
+    if (liblog_handle == nullptr) {
+      return {};
+    }
+
+    LibLogFunctions real_liblog_functions = {};
+
+#define DLSYM(name)                                                                   \
+  real_liblog_functions.name =                                                        \
+      reinterpret_cast<decltype(LibLogFunctions::name)>(dlsym(liblog_handle, #name)); \
+  if (real_liblog_functions.name == nullptr) {                                        \
+    return {};                                                                        \
+  }
+
+    DLSYM(__android_log_set_logger)
+    DLSYM(__android_log_write_logger_data)
+    DLSYM(__android_log_logd_logger)
+    DLSYM(__android_log_stderr_logger)
+    DLSYM(__android_log_set_aborter)
+    DLSYM(__android_log_call_aborter)
+    DLSYM(__android_log_default_aborter)
+    DLSYM(__android_log_set_minimum_priority);
+    DLSYM(__android_log_get_minimum_priority);
+    DLSYM(__android_log_set_default_tag);
+#undef DLSYM
+
+    return real_liblog_functions;
+  }();
+
+  return liblog_functions;
+}
+
+#else
+
+const std::optional<LibLogFunctions>& GetLibLogFunctions() {
+  static std::optional<LibLogFunctions> liblog_functions = []() -> std::optional<LibLogFunctions> {
+    return LibLogFunctions{
+        .__android_log_set_logger = __android_log_set_logger,
+        .__android_log_write_logger_data = __android_log_write_logger_data,
+        .__android_log_logd_logger = __android_log_logd_logger,
+        .__android_log_stderr_logger = __android_log_stderr_logger,
+        .__android_log_set_aborter = __android_log_set_aborter,
+        .__android_log_call_aborter = __android_log_call_aborter,
+        .__android_log_default_aborter = __android_log_default_aborter,
+        .__android_log_set_minimum_priority = __android_log_set_minimum_priority,
+        .__android_log_get_minimum_priority = __android_log_get_minimum_priority,
+        .__android_log_set_default_tag = __android_log_set_default_tag,
+    };
+  }();
+  return liblog_functions;
+}
+
+#endif
+
+}  // namespace base
+}  // namespace android
diff --git a/base/liblog_symbols.h b/base/liblog_symbols.h
new file mode 100644
index 0000000..d3134e9
--- /dev/null
+++ b/base/liblog_symbols.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <optional>
+
+#include <android/log.h>
+
+namespace android {
+namespace base {
+
+struct LibLogFunctions {
+  void (*__android_log_set_logger)(__android_logger_function logger);
+  void (*__android_log_write_logger_data)(struct __android_logger_data* logger_data,
+                                          const char* msg);
+
+  void (*__android_log_logd_logger)(const struct __android_logger_data* logger_data,
+                                    const char* msg);
+  void (*__android_log_stderr_logger)(const struct __android_logger_data* logger_data,
+                                      const char* message);
+
+  void (*__android_log_set_aborter)(__android_aborter_function aborter);
+  void (*__android_log_call_aborter)(const char* abort_message);
+  void (*__android_log_default_aborter)(const char* abort_message);
+  int (*__android_log_set_minimum_priority)(int priority);
+  int (*__android_log_get_minimum_priority)();
+  void (*__android_log_set_default_tag)(const char* tag);
+};
+
+const std::optional<LibLogFunctions>& GetLibLogFunctions();
+
+}  // namespace base
+}  // namespace android
diff --git a/base/logging.cpp b/base/logging.cpp
index f89168c..f42b996 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -36,17 +36,18 @@
 #include <sys/uio.h>
 #endif
 
+#include <atomic>
 #include <iostream>
 #include <limits>
 #include <mutex>
+#include <optional>
 #include <sstream>
 #include <string>
 #include <utility>
 #include <vector>
 
-// Headers for LogMessage::LogLine.
-#ifdef __ANDROID__
 #include <android/log.h>
+#ifdef __ANDROID__
 #include <android/set_abort_message.h>
 #else
 #include <sys/types.h>
@@ -59,6 +60,8 @@
 #include <android-base/strings.h>
 #include <android-base/threads.h>
 
+#include "liblog_symbols.h"
+
 namespace android {
 namespace base {
 
@@ -115,11 +118,84 @@
 }
 #endif
 
+static LogId log_id_tToLogId(int buffer_id) {
+  switch (buffer_id) {
+    case LOG_ID_MAIN:
+      return MAIN;
+    case LOG_ID_SYSTEM:
+      return SYSTEM;
+    case LOG_ID_RADIO:
+      return RADIO;
+    case LOG_ID_CRASH:
+      return CRASH;
+    case LOG_ID_DEFAULT:
+    default:
+      return DEFAULT;
+  }
+}
+
+static int LogIdTolog_id_t(LogId log_id) {
+  switch (log_id) {
+    case MAIN:
+      return LOG_ID_MAIN;
+    case SYSTEM:
+      return LOG_ID_SYSTEM;
+    case RADIO:
+      return LOG_ID_RADIO;
+    case CRASH:
+      return LOG_ID_CRASH;
+    case DEFAULT:
+    default:
+      return LOG_ID_DEFAULT;
+  }
+}
+
+static LogSeverity PriorityToLogSeverity(int priority) {
+  switch (priority) {
+    case ANDROID_LOG_DEFAULT:
+      return INFO;
+    case ANDROID_LOG_VERBOSE:
+      return VERBOSE;
+    case ANDROID_LOG_DEBUG:
+      return DEBUG;
+    case ANDROID_LOG_INFO:
+      return INFO;
+    case ANDROID_LOG_WARN:
+      return WARNING;
+    case ANDROID_LOG_ERROR:
+      return ERROR;
+    case ANDROID_LOG_FATAL:
+      return FATAL;
+    default:
+      return FATAL;
+  }
+}
+
+static android_LogPriority LogSeverityToPriority(LogSeverity severity) {
+  switch (severity) {
+    case VERBOSE:
+      return ANDROID_LOG_VERBOSE;
+    case DEBUG:
+      return ANDROID_LOG_DEBUG;
+    case INFO:
+      return ANDROID_LOG_INFO;
+    case WARNING:
+      return ANDROID_LOG_WARN;
+    case ERROR:
+      return ANDROID_LOG_ERROR;
+    case FATAL_WITHOUT_ABORT:
+    case FATAL:
+    default:
+      return ANDROID_LOG_FATAL;
+  }
+}
+
 static std::mutex& LoggingLock() {
   static auto& logging_lock = *new std::mutex();
   return logging_lock;
 }
 
+// Only used for Q fallback.
 static LogFunction& Logger() {
 #ifdef __ANDROID__
   static auto& logger = *new LogFunction(LogdLogger());
@@ -129,35 +205,39 @@
   return logger;
 }
 
+// Only used for Q fallback.
 static AbortFunction& Aborter() {
   static auto& aborter = *new AbortFunction(DefaultAborter);
   return aborter;
 }
 
+// Only used for Q fallback.
 static std::recursive_mutex& TagLock() {
   static auto& tag_lock = *new std::recursive_mutex();
   return tag_lock;
 }
+// Only used for Q fallback.
 static std::string* gDefaultTag;
-std::string GetDefaultTag() {
-  std::lock_guard<std::recursive_mutex> lock(TagLock());
-  if (gDefaultTag == nullptr) {
-    return "";
-  }
-  return *gDefaultTag;
-}
+
 void SetDefaultTag(const std::string& tag) {
-  std::lock_guard<std::recursive_mutex> lock(TagLock());
-  if (gDefaultTag != nullptr) {
-    delete gDefaultTag;
-    gDefaultTag = nullptr;
-  }
-  if (!tag.empty()) {
-    gDefaultTag = new std::string(tag);
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    liblog_functions->__android_log_set_default_tag(tag.c_str());
+  } else {
+    std::lock_guard<std::recursive_mutex> lock(TagLock());
+    if (gDefaultTag != nullptr) {
+      delete gDefaultTag;
+      gDefaultTag = nullptr;
+    }
+    if (!tag.empty()) {
+      gDefaultTag = new std::string(tag);
+    }
   }
 }
 
 static bool gInitialized = false;
+
+// Only used for Q fallback.
 static LogSeverity gMinimumLogSeverity = INFO;
 
 #if defined(__linux__)
@@ -218,8 +298,13 @@
   static_assert(arraysize(log_characters) - 1 == FATAL + 1,
                 "Mismatch in size of log_characters and values in LogSeverity");
   char severity_char = log_characters[severity];
-  fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s:%u] %s\n", tag ? tag : "nullptr", severity_char,
-          timestamp, getpid(), GetThreadId(), file, line, message);
+  if (file != nullptr) {
+    fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s:%u] %s\n", tag ? tag : "nullptr", severity_char,
+            timestamp, getpid(), GetThreadId(), file, line, message);
+  } else {
+    fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s\n", tag ? tag : "nullptr", severity_char,
+            timestamp, getpid(), GetThreadId(), message);
+  }
 }
 
 void StdioLogger(LogId, LogSeverity severity, const char* /*tag*/, const char* /*file*/,
@@ -242,41 +327,35 @@
 }
 
 
-#ifdef __ANDROID__
 LogdLogger::LogdLogger(LogId default_log_id) : default_log_id_(default_log_id) {
 }
 
 void LogdLogger::operator()(LogId id, LogSeverity severity, const char* tag,
                             const char* file, unsigned int line,
                             const char* message) {
-  static constexpr android_LogPriority kLogSeverityToAndroidLogPriority[] = {
-      ANDROID_LOG_VERBOSE, ANDROID_LOG_DEBUG, ANDROID_LOG_INFO,
-      ANDROID_LOG_WARN,    ANDROID_LOG_ERROR, ANDROID_LOG_FATAL,
-      ANDROID_LOG_FATAL,
-  };
-  static_assert(arraysize(kLogSeverityToAndroidLogPriority) == FATAL + 1,
-                "Mismatch in size of kLogSeverityToAndroidLogPriority and values in LogSeverity");
-
-  int priority = kLogSeverityToAndroidLogPriority[severity];
+  android_LogPriority priority = LogSeverityToPriority(severity);
   if (id == DEFAULT) {
     id = default_log_id_;
   }
 
-  static constexpr log_id kLogIdToAndroidLogId[] = {
-    LOG_ID_MAX, LOG_ID_MAIN, LOG_ID_SYSTEM,
-  };
-  static_assert(arraysize(kLogIdToAndroidLogId) == SYSTEM + 1,
-                "Mismatch in size of kLogIdToAndroidLogId and values in LogId");
-  log_id lg_id = kLogIdToAndroidLogId[id];
+  int lg_id = LogIdTolog_id_t(id);
 
-  if (priority == ANDROID_LOG_FATAL) {
-    __android_log_buf_print(lg_id, priority, tag, "%s:%u] %s", file, line,
-                            message);
+  char log_message_with_file[4068];  // LOGGER_ENTRY_MAX_PAYLOAD, not available in the NDK.
+  if (priority == ANDROID_LOG_FATAL && file != nullptr) {
+    snprintf(log_message_with_file, sizeof(log_message_with_file), "%s:%u] %s", file, line,
+             message);
+    message = log_message_with_file;
+  }
+
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    __android_logger_data logger_data = {sizeof(__android_logger_data),     lg_id, priority, tag,
+                                         static_cast<const char*>(nullptr), 0};
+    liblog_functions->__android_log_logd_logger(&logger_data, message);
   } else {
     __android_log_buf_print(lg_id, priority, tag, "%s", message);
   }
 }
-#endif
 
 void InitLogging(char* argv[], LogFunction&& logger, AbortFunction&& aborter) {
   SetLogger(std::forward<LogFunction>(logger));
@@ -307,27 +386,27 @@
     if (spec.size() == 3 && StartsWith(spec, "*:")) {
       switch (spec[2]) {
         case 'v':
-          gMinimumLogSeverity = VERBOSE;
+          SetMinimumLogSeverity(VERBOSE);
           continue;
         case 'd':
-          gMinimumLogSeverity = DEBUG;
+          SetMinimumLogSeverity(DEBUG);
           continue;
         case 'i':
-          gMinimumLogSeverity = INFO;
+          SetMinimumLogSeverity(INFO);
           continue;
         case 'w':
-          gMinimumLogSeverity = WARNING;
+          SetMinimumLogSeverity(WARNING);
           continue;
         case 'e':
-          gMinimumLogSeverity = ERROR;
+          SetMinimumLogSeverity(ERROR);
           continue;
         case 'f':
-          gMinimumLogSeverity = FATAL_WITHOUT_ABORT;
+          SetMinimumLogSeverity(FATAL_WITHOUT_ABORT);
           continue;
         // liblog will even suppress FATAL if you say 's' for silent, but that's
         // crazy!
         case 's':
-          gMinimumLogSeverity = FATAL_WITHOUT_ABORT;
+          SetMinimumLogSeverity(FATAL_WITHOUT_ABORT);
           continue;
       }
     }
@@ -337,24 +416,56 @@
 }
 
 void SetLogger(LogFunction&& logger) {
-  std::lock_guard<std::mutex> lock(LoggingLock());
-  Logger() = std::move(logger);
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    // We need to atomically swap the old and new pointers since other threads may be logging.
+    // We know all threads will be using the new logger after __android_log_set_logger() returns,
+    // so we can delete it then.
+    // This leaks one std::function<> per instance of libbase if multiple copies of libbase within a
+    // single process call SetLogger().  That is the same cost as having a static
+    // std::function<>, which is the not-thread-safe alternative.
+    static std::atomic<LogFunction*> logger_function(nullptr);
+    auto* old_logger_function = logger_function.exchange(new LogFunction(logger));
+    liblog_functions->__android_log_set_logger([](const struct __android_logger_data* logger_data,
+                                                  const char* message) {
+      auto log_id = log_id_tToLogId(logger_data->buffer_id);
+      auto severity = PriorityToLogSeverity(logger_data->priority);
+
+      auto& function = *logger_function.load(std::memory_order_acquire);
+      function(log_id, severity, logger_data->tag, logger_data->file, logger_data->line, message);
+    });
+    delete old_logger_function;
+  } else {
+    std::lock_guard<std::mutex> lock(LoggingLock());
+    Logger() = std::move(logger);
+  }
 }
 
 void SetAborter(AbortFunction&& aborter) {
-  std::lock_guard<std::mutex> lock(LoggingLock());
-  Aborter() = std::move(aborter);
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    // See the comment in SetLogger().
+    static std::atomic<AbortFunction*> abort_function(nullptr);
+    auto* old_abort_function = abort_function.exchange(new AbortFunction(aborter));
+    __android_log_set_aborter([](const char* abort_message) {
+      auto& function = *abort_function.load(std::memory_order_acquire);
+      function(abort_message);
+    });
+    delete old_abort_function;
+  } else {
+    std::lock_guard<std::mutex> lock(LoggingLock());
+    Aborter() = std::move(aborter);
+  }
 }
 
 // This indirection greatly reduces the stack impact of having lots of
 // checks/logging in a function.
 class LogMessageData {
  public:
-  LogMessageData(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                 const char* tag, int error)
+  LogMessageData(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                 int error)
       : file_(GetFileBasename(file)),
         line_number_(line),
-        id_(id),
         severity_(severity),
         tag_(tag),
         error_(error) {}
@@ -373,10 +484,6 @@
 
   const char* GetTag() const { return tag_; }
 
-  LogId GetId() const {
-    return id_;
-  }
-
   int GetError() const {
     return error_;
   }
@@ -393,7 +500,6 @@
   std::ostringstream buffer_;
   const char* const file_;
   const unsigned int line_number_;
-  const LogId id_;
   const LogSeverity severity_;
   const char* const tag_;
   const int error_;
@@ -401,9 +507,13 @@
   DISALLOW_COPY_AND_ASSIGN(LogMessageData);
 };
 
-LogMessage::LogMessage(const char* file, unsigned int line, LogId id, LogSeverity severity,
+LogMessage::LogMessage(const char* file, unsigned int line, LogId, LogSeverity severity,
                        const char* tag, int error)
-    : data_(new LogMessageData(file, line, id, severity, tag, error)) {}
+    : LogMessage(file, line, severity, tag, error) {}
+
+LogMessage::LogMessage(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                       int error)
+    : data_(new LogMessageData(file, line, severity, tag, error)) {}
 
 LogMessage::~LogMessage() {
   // Check severity again. This is duplicate work wrt/ LOG macros, but not LOG_STREAM.
@@ -429,16 +539,16 @@
     // Do the actual logging with the lock held.
     std::lock_guard<std::mutex> lock(LoggingLock());
     if (msg.find('\n') == std::string::npos) {
-      LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(), data_->GetSeverity(),
-              data_->GetTag(), msg.c_str());
+      LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(), data_->GetTag(),
+              msg.c_str());
     } else {
       msg += '\n';
       size_t i = 0;
       while (i < msg.size()) {
         size_t nl = msg.find('\n', i);
         msg[nl] = '\0';
-        LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(), data_->GetSeverity(),
-                data_->GetTag(), &msg[i]);
+        LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(), data_->GetTag(),
+                &msg[i]);
         // Undo the zero-termination so we can give the complete message to the aborter.
         msg[nl] = '\n';
         i = nl + 1;
@@ -448,7 +558,12 @@
 
   // Abort if necessary.
   if (data_->GetSeverity() == FATAL) {
-    Aborter()(msg.c_str());
+    static auto& liblog_functions = GetLibLogFunctions();
+    if (liblog_functions) {
+      liblog_functions->__android_log_call_aborter(msg.c_str());
+    } else {
+      Aborter()(msg.c_str());
+    }
   }
 }
 
@@ -456,27 +571,60 @@
   return data_->GetBuffer();
 }
 
-void LogMessage::LogLine(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                         const char* tag, const char* message) {
-  if (tag == nullptr) {
-    std::lock_guard<std::recursive_mutex> lock(TagLock());
-    if (gDefaultTag == nullptr) {
-      gDefaultTag = new std::string(getprogname());
-    }
-    Logger()(id, severity, gDefaultTag->c_str(), file, line, message);
+void LogMessage::LogLine(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                         const char* message) {
+  static auto& liblog_functions = GetLibLogFunctions();
+  auto priority = LogSeverityToPriority(severity);
+  if (liblog_functions) {
+    __android_logger_data logger_data = {
+        sizeof(__android_logger_data), LOG_ID_DEFAULT, priority, tag, file, line};
+    __android_log_write_logger_data(&logger_data, message);
   } else {
-    Logger()(id, severity, tag, file, line, message);
+    if (tag == nullptr) {
+      std::lock_guard<std::recursive_mutex> lock(TagLock());
+      if (gDefaultTag == nullptr) {
+        gDefaultTag = new std::string(getprogname());
+      }
+
+      Logger()(DEFAULT, severity, gDefaultTag->c_str(), file, line, message);
+    } else {
+      Logger()(DEFAULT, severity, tag, file, line, message);
+    }
   }
 }
 
 LogSeverity GetMinimumLogSeverity() {
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    return PriorityToLogSeverity(liblog_functions->__android_log_get_minimum_priority());
+  } else {
     return gMinimumLogSeverity;
+  }
+}
+
+bool ShouldLog(LogSeverity severity, const char* tag) {
+  static auto& liblog_functions = GetLibLogFunctions();
+  // Even though we're not using the R liblog functions in this function, if we're running on Q,
+  // we need to fall back to using gMinimumLogSeverity, since __android_log_is_loggable() will not
+  // take into consideration the value from SetMinimumLogSeverity().
+  if (liblog_functions) {
+    int priority = LogSeverityToPriority(severity);
+    return __android_log_is_loggable(priority, tag, ANDROID_LOG_INFO);
+  } else {
+    return severity >= gMinimumLogSeverity;
+  }
 }
 
 LogSeverity SetMinimumLogSeverity(LogSeverity new_severity) {
-  LogSeverity old_severity = gMinimumLogSeverity;
-  gMinimumLogSeverity = new_severity;
-  return old_severity;
+  static auto& liblog_functions = GetLibLogFunctions();
+  if (liblog_functions) {
+    auto priority = LogSeverityToPriority(new_severity);
+    return PriorityToLogSeverity(liblog_functions->__android_log_set_minimum_priority(priority));
+  } else {
+    LogSeverity old_severity = gMinimumLogSeverity;
+    gMinimumLogSeverity = new_severity;
+    return old_severity;
+  }
 }
 
 ScopedLogSeverity::ScopedLogSeverity(LogSeverity new_severity) {
diff --git a/base/logging_test.cpp b/base/logging_test.cpp
index 3113fb4..3a453e6 100644
--- a/base/logging_test.cpp
+++ b/base/logging_test.cpp
@@ -140,10 +140,6 @@
   CHECK_WOULD_LOG_ENABLED(FATAL);
 }
 
-TEST(logging, WOULD_LOG_FATAL_WITHOUT_ABORT_disabled) {
-  CHECK_WOULD_LOG_DISABLED(FATAL_WITHOUT_ABORT);
-}
-
 TEST(logging, WOULD_LOG_FATAL_WITHOUT_ABORT_enabled) {
   CHECK_WOULD_LOG_ENABLED(FATAL_WITHOUT_ABORT);
 }
@@ -266,10 +262,6 @@
     CheckMessage(cap2, android::base::severity, "foobar"); \
   } \
 
-TEST(logging, LOG_STREAM_FATAL_WITHOUT_ABORT_disabled) {
-  CHECK_LOG_STREAM_DISABLED(FATAL_WITHOUT_ABORT);
-}
-
 TEST(logging, LOG_STREAM_FATAL_WITHOUT_ABORT_enabled) {
   ASSERT_NO_FATAL_FAILURE(CHECK_LOG_STREAM_ENABLED(FATAL_WITHOUT_ABORT));
 }
@@ -352,10 +344,6 @@
   ASSERT_DEATH({SuppressAbortUI(); LOG(::android::base::FATAL) << "foobar";}, "foobar");
 }
 
-TEST(logging, LOG_FATAL_WITHOUT_ABORT_disabled) {
-  CHECK_LOG_DISABLED(FATAL_WITHOUT_ABORT);
-}
-
 TEST(logging, LOG_FATAL_WITHOUT_ABORT_enabled) {
   ASSERT_NO_FATAL_FAILURE(CHECK_LOG_ENABLED(FATAL_WITHOUT_ABORT));
 }
@@ -508,10 +496,6 @@
   ASSERT_DEATH({SuppressAbortUI(); PLOG(::android::base::FATAL) << "foobar";}, "foobar");
 }
 
-TEST(logging, PLOG_FATAL_WITHOUT_ABORT_disabled) {
-  CHECK_PLOG_DISABLED(FATAL_WITHOUT_ABORT);
-}
-
 TEST(logging, PLOG_FATAL_WITHOUT_ABORT_enabled) {
   ASSERT_NO_FATAL_FAILURE(CHECK_PLOG_ENABLED(FATAL_WITHOUT_ABORT));
 }
@@ -619,21 +603,6 @@
   LOG(ERROR) << "foobar";
 }
 
-TEST(logging, SetDefaultTag) {
-  constexpr const char* expected_tag = "test_tag";
-  constexpr const char* expected_msg = "foobar";
-  CapturedStderr cap;
-  {
-    std::string old_default_tag = android::base::GetDefaultTag();
-    android::base::SetDefaultTag(expected_tag);
-    android::base::ScopedLogSeverity sls(android::base::LogSeverity::INFO);
-    LOG(INFO) << expected_msg;
-    android::base::SetDefaultTag(old_default_tag);
-  }
-  ASSERT_NO_FATAL_FAILURE(
-      CheckMessage(cap, android::base::LogSeverity::INFO, expected_msg, expected_tag));
-}
-
 TEST(logging, StdioLogger) {
   CapturedStderr cap_err;
   CapturedStdout cap_out;
diff --git a/base/mapped_file.cpp b/base/mapped_file.cpp
index 862b73b..fff3453 100644
--- a/base/mapped_file.cpp
+++ b/base/mapped_file.cpp
@@ -38,15 +38,14 @@
 std::unique_ptr<MappedFile> MappedFile::FromFd(borrowed_fd fd, off64_t offset, size_t length,
                                                int prot) {
 #if defined(_WIN32)
-  auto file =
-      FromOsHandle(reinterpret_cast<HANDLE>(_get_osfhandle(fd.get())), offset, length, prot);
+  return FromOsHandle(reinterpret_cast<HANDLE>(_get_osfhandle(fd.get())), offset, length, prot);
 #else
-  auto file = FromOsHandle(fd.get(), offset, length, prot);
+  return FromOsHandle(fd.get(), offset, length, prot);
 #endif
-  return file ? std::make_unique<MappedFile>(std::move(file)) : std::unique_ptr<MappedFile>{};
 }
 
-MappedFile MappedFile::FromOsHandle(os_handle h, off64_t offset, size_t length, int prot) {
+std::unique_ptr<MappedFile> MappedFile::FromOsHandle(os_handle h, off64_t offset, size_t length,
+                                                     int prot) {
   static const off64_t page_size = InitPageSize();
   size_t slop = offset % page_size;
   off64_t file_offset = offset - slop;
@@ -59,28 +58,30 @@
     // http://b/119818070 "app crashes when reading asset of zero length".
     // Return a MappedFile that's only valid for reading the size.
     if (length == 0 && ::GetLastError() == ERROR_FILE_INVALID) {
-      return MappedFile{const_cast<char*>(kEmptyBuffer), 0, 0, nullptr};
+      return std::unique_ptr<MappedFile>(
+          new MappedFile(const_cast<char*>(kEmptyBuffer), 0, 0, nullptr));
     }
-    return MappedFile(nullptr, 0, 0, nullptr);
+    return nullptr;
   }
   void* base = MapViewOfFile(handle, (prot & PROT_WRITE) ? FILE_MAP_ALL_ACCESS : FILE_MAP_READ, 0,
                              file_offset, file_length);
   if (base == nullptr) {
     CloseHandle(handle);
-    return MappedFile(nullptr, 0, 0, nullptr);
+    return nullptr;
   }
-  return MappedFile{static_cast<char*>(base), length, slop, handle};
+  return std::unique_ptr<MappedFile>(
+      new MappedFile(static_cast<char*>(base), length, slop, handle));
 #else
   void* base = mmap(nullptr, file_length, prot, MAP_SHARED, h, file_offset);
   if (base == MAP_FAILED) {
     // http://b/119818070 "app crashes when reading asset of zero length".
     // mmap fails with EINVAL for a zero length region.
     if (errno == EINVAL && length == 0) {
-      return MappedFile{const_cast<char*>(kEmptyBuffer), 0, 0};
+      return std::unique_ptr<MappedFile>(new MappedFile(const_cast<char*>(kEmptyBuffer), 0, 0));
     }
-    return MappedFile(nullptr, 0, 0);
+    return nullptr;
   }
-  return MappedFile{static_cast<char*>(base), length, slop};
+  return std::unique_ptr<MappedFile>(new MappedFile(static_cast<char*>(base), length, slop));
 #endif
 }
 
diff --git a/base/mapped_file_test.cpp b/base/mapped_file_test.cpp
index 3629108..d21703c 100644
--- a/base/mapped_file_test.cpp
+++ b/base/mapped_file_test.cpp
@@ -44,8 +44,6 @@
   ASSERT_TRUE(tf.fd != -1);
 
   auto m = android::base::MappedFile::FromFd(tf.fd, 4096, 0, PROT_READ);
-  ASSERT_NE(nullptr, m);
-  EXPECT_TRUE((bool)*m);
   EXPECT_EQ(0u, m->size());
   EXPECT_NE(nullptr, m->data());
 }
diff --git a/base/no_destructor_test.cpp b/base/no_destructor_test.cpp
new file mode 100644
index 0000000..f19468a
--- /dev/null
+++ b/base/no_destructor_test.cpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "android-base/no_destructor.h"
+
+#include <gtest/gtest.h>
+
+struct __attribute__((packed)) Bomb {
+  Bomb() : magic_(123) {}
+
+  ~Bomb() { exit(42); }
+
+  int get() const { return magic_; }
+
+ private:
+  [[maybe_unused]] char padding_;
+  int magic_;
+};
+
+TEST(no_destructor, bomb) {
+  ASSERT_EXIT(({
+                {
+                  Bomb b;
+                  if (b.get() != 123) exit(1);
+                }
+
+                exit(0);
+              }),
+              ::testing::ExitedWithCode(42), "");
+}
+
+TEST(no_destructor, defused) {
+  ASSERT_EXIT(({
+                {
+                  android::base::NoDestructor<Bomb> b;
+                  if (b->get() != 123) exit(1);
+                }
+
+                exit(0);
+              }),
+              ::testing::ExitedWithCode(0), "");
+}
+
+TEST(no_destructor, operators) {
+  android::base::NoDestructor<Bomb> b;
+  const android::base::NoDestructor<Bomb>& c = b;
+  ASSERT_EQ(123, b.get()->get());
+  ASSERT_EQ(123, b->get());
+  ASSERT_EQ(123, (*b).get());
+  ASSERT_EQ(123, c.get()->get());
+  ASSERT_EQ(123, c->get());
+  ASSERT_EQ(123, (*c).get());
+}
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/base/parsebool.cpp
similarity index 62%
copy from libmeminfo/vts/vts_meminfo_test.cpp
copy to base/parsebool.cpp
index 3193c31..ff96fe9 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/base/parsebool.cpp
@@ -14,18 +14,21 @@
  * limitations under the License.
  */
 
-#include <gtest/gtest.h>
-
-#include <meminfo/procmeminfo.h>
+#include "android-base/parsebool.h"
+#include <errno.h>
 
 namespace android {
-namespace meminfo {
+namespace base {
 
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
+ParseBoolResult ParseBool(std::string_view s) {
+  if (s == "1" || s == "y" || s == "yes" || s == "on" || s == "true") {
+    return ParseBoolResult::kTrue;
+  }
+  if (s == "0" || s == "n" || s == "no" || s == "off" || s == "false") {
+    return ParseBoolResult::kFalse;
+  }
+  return ParseBoolResult::kError;
 }
 
-}  // namespace meminfo
+}  // namespace base
 }  // namespace android
diff --git a/base/parsebool_test.cpp b/base/parsebool_test.cpp
new file mode 100644
index 0000000..a081994
--- /dev/null
+++ b/base/parsebool_test.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "android-base/parsebool.h"
+
+#include <errno.h>
+
+#include <gtest/gtest.h>
+#include <string_view>
+
+using android::base::ParseBool;
+using android::base::ParseBoolResult;
+
+TEST(parsebool, true_) {
+  static const char* yes[] = {
+      "1", "on", "true", "y", "yes",
+  };
+  for (const char* s : yes) {
+    ASSERT_EQ(ParseBoolResult::kTrue, ParseBool(s));
+  }
+}
+
+TEST(parsebool, false_) {
+  static const char* no[] = {
+      "0", "false", "n", "no", "off",
+  };
+  for (const char* s : no) {
+    ASSERT_EQ(ParseBoolResult::kFalse, ParseBool(s));
+  }
+}
+
+TEST(parsebool, invalid) {
+  ASSERT_EQ(ParseBoolResult::kError, ParseBool("blarg"));
+  ASSERT_EQ(ParseBoolResult::kError, ParseBool(""));
+}
diff --git a/base/properties.cpp b/base/properties.cpp
index d5a5918..4731bf2 100644
--- a/base/properties.cpp
+++ b/base/properties.cpp
@@ -28,19 +28,22 @@
 #include <map>
 #include <string>
 
+#include <android-base/parsebool.h>
 #include <android-base/parseint.h>
 
 namespace android {
 namespace base {
 
 bool GetBoolProperty(const std::string& key, bool default_value) {
-  std::string value = GetProperty(key, "");
-  if (value == "1" || value == "y" || value == "yes" || value == "on" || value == "true") {
-    return true;
-  } else if (value == "0" || value == "n" || value == "no" || value == "off" || value == "false") {
-    return false;
+  switch (ParseBool(GetProperty(key, ""))) {
+    case ParseBoolResult::kError:
+      return default_value;
+    case ParseBoolResult::kFalse:
+      return false;
+    case ParseBoolResult::kTrue:
+      return true;
   }
-  return default_value;
+  __builtin_unreachable();
 }
 
 template <typename T>
diff --git a/base/quick_exit.cpp b/base/quick_exit.cpp
deleted file mode 100644
index e4dd62b..0000000
--- a/base/quick_exit.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "android-base/quick_exit.h"
-
-#if !defined(__linux__)
-
-#include <mutex>
-#include <vector>
-
-namespace android {
-namespace base {
-
-static auto& quick_exit_mutex = *new std::mutex();
-static auto& quick_exit_handlers = *new std::vector<void (*)()>();
-
-void quick_exit(int exit_code) {
-  std::lock_guard<std::mutex> lock(quick_exit_mutex);
-  for (auto it = quick_exit_handlers.rbegin(); it != quick_exit_handlers.rend(); ++it) {
-    (*it)();
-  }
-  _Exit(exit_code);
-}
-
-int at_quick_exit(void (*func)()) {
-  std::lock_guard<std::mutex> lock(quick_exit_mutex);
-  quick_exit_handlers.push_back(func);
-  return 0;
-}
-
-}  // namespace base
-}  // namespace android
-#endif
diff --git a/base/quick_exit_test.cpp b/base/quick_exit_test.cpp
deleted file mode 100644
index 7ca8156..0000000
--- a/base/quick_exit_test.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "android-base/quick_exit.h"
-
-#include <gtest/gtest.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "android-base/test_utils.h"
-
-// These tests are a bit sketchy, since each test run adds global state that affects subsequent
-// tests (including ones not in this file!). Exit with 0 in Exiter and stick the at_quick_exit test
-// at the end to hack around this.
-struct Exiter {
-  ~Exiter() {
-    _Exit(0);
-  }
-};
-
-TEST(quick_exit, smoke) {
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
-}
-
-TEST(quick_exit, skip_static_destructors) {
-  static Exiter exiter;
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
-}
-
-TEST(quick_exit, at_quick_exit) {
-  static int counter = 4;
-  // "Functions passed to at_quick_exit are called in reverse order of their registration."
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { _exit(counter); }));
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { counter += 2; }));
-  ASSERT_EQ(0, android::base::at_quick_exit([]() { counter *= 10; }));
-  ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(42), "");
-}
diff --git a/base/result_test.cpp b/base/result_test.cpp
index 2ee4057..c0ac0fd 100644
--- a/base/result_test.cpp
+++ b/base/result_test.cpp
@@ -30,7 +30,7 @@
 
 TEST(result, result_accessors) {
   Result<std::string> result = "success";
-  ASSERT_TRUE(result);
+  ASSERT_RESULT_OK(result);
   ASSERT_TRUE(result.has_value());
 
   EXPECT_EQ("success", *result);
@@ -40,7 +40,7 @@
 }
 
 TEST(result, result_accessors_rvalue) {
-  ASSERT_TRUE(Result<std::string>("success"));
+  ASSERT_TRUE(Result<std::string>("success").ok());
   ASSERT_TRUE(Result<std::string>("success").has_value());
 
   EXPECT_EQ("success", *Result<std::string>("success"));
@@ -51,12 +51,12 @@
 
 TEST(result, result_void) {
   Result<void> ok = {};
-  EXPECT_TRUE(ok);
+  EXPECT_RESULT_OK(ok);
   ok.value();  // should not crash
   ASSERT_DEATH(ok.error(), "");
 
   Result<void> fail = Error() << "failure" << 1;
-  EXPECT_FALSE(fail);
+  EXPECT_FALSE(fail.ok());
   EXPECT_EQ("failure1", fail.error().message());
   EXPECT_EQ(0, fail.error().code());
   EXPECT_TRUE(ok != fail);
@@ -66,8 +66,8 @@
     if (ok) return {};
     else return Error() << "failure" << 1;
   };
-  EXPECT_TRUE(test(true));
-  EXPECT_FALSE(test(false));
+  EXPECT_TRUE(test(true).ok());
+  EXPECT_FALSE(test(false).ok());
   test(true).value();  // should not crash
   ASSERT_DEATH(test(true).error(), "");
   ASSERT_DEATH(test(false).value(), "");
@@ -76,7 +76,7 @@
 
 TEST(result, result_error) {
   Result<void> result = Error() << "failure" << 1;
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   EXPECT_EQ(0, result.error().code());
@@ -85,7 +85,7 @@
 
 TEST(result, result_error_empty) {
   Result<void> result = Error();
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   EXPECT_EQ(0, result.error().code());
@@ -100,7 +100,7 @@
   // create is.
 
   auto MakeRvalueErrorResult = []() -> Result<void> { return Error() << "failure" << 1; };
-  ASSERT_FALSE(MakeRvalueErrorResult());
+  ASSERT_FALSE(MakeRvalueErrorResult().ok());
   ASSERT_FALSE(MakeRvalueErrorResult().has_value());
 
   EXPECT_EQ(0, MakeRvalueErrorResult().error().code());
@@ -112,7 +112,7 @@
   errno = test_errno;
   Result<void> result = ErrnoError() << "failure" << 1;
 
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   EXPECT_EQ(test_errno, result.error().code());
@@ -124,7 +124,7 @@
   errno = test_errno;
   Result<void> result = ErrnoError();
 
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   EXPECT_EQ(test_errno, result.error().code());
@@ -135,12 +135,12 @@
   auto error_text = "test error"s;
   Result<void> result = Error() << error_text;
 
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   Result<std::string> result2 = result.error();
 
-  ASSERT_FALSE(result2);
+  ASSERT_FALSE(result2.ok());
   ASSERT_FALSE(result2.has_value());
 
   EXPECT_EQ(0, result2.error().code());
@@ -151,12 +151,12 @@
   auto error_text = "test error"s;
   Result<void> result = Error() << error_text;
 
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   Result<std::string> result2 = Error() << result.error();
 
-  ASSERT_FALSE(result2);
+  ASSERT_FALSE(result2.ok());
   ASSERT_FALSE(result2.has_value());
 
   EXPECT_EQ(0, result2.error().code());
@@ -171,12 +171,12 @@
 
   errno = 0;
 
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   ASSERT_FALSE(result.has_value());
 
   Result<std::string> result2 = Error() << result.error();
 
-  ASSERT_FALSE(result2);
+  ASSERT_FALSE(result2.ok());
   ASSERT_FALSE(result2.has_value());
 
   EXPECT_EQ(test_errno, result2.error().code());
@@ -186,7 +186,7 @@
 TEST(result, constructor_forwarding) {
   auto result = Result<std::string>(std::in_place, 5, 'a');
 
-  ASSERT_TRUE(result);
+  ASSERT_RESULT_OK(result);
   ASSERT_TRUE(result.has_value());
 
   EXPECT_EQ("aaaaa", *result);
@@ -254,7 +254,7 @@
   // are called.
 
   auto result1 = ReturnConstructorTracker("");
-  ASSERT_TRUE(result1);
+  ASSERT_RESULT_OK(result1);
   EXPECT_EQ("literal string", result1->string);
   EXPECT_EQ(1U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -263,7 +263,7 @@
   EXPECT_EQ(0U, ConstructorTracker::move_assignment_called);
 
   auto result2 = ReturnConstructorTracker("test2");
-  ASSERT_TRUE(result2);
+  ASSERT_RESULT_OK(result2);
   EXPECT_EQ("test2test22", result2->string);
   EXPECT_EQ(2U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -272,7 +272,7 @@
   EXPECT_EQ(0U, ConstructorTracker::move_assignment_called);
 
   auto result3 = ReturnConstructorTracker("test3");
-  ASSERT_TRUE(result3);
+  ASSERT_RESULT_OK(result3);
   EXPECT_EQ("test3 test3", result3->string);
   EXPECT_EQ(3U, ConstructorTracker::constructor_called);
   EXPECT_EQ(0U, ConstructorTracker::copy_constructor_called);
@@ -287,11 +287,11 @@
 TEST(result, result_result_with_success) {
   auto return_result_result_with_success = []() -> Result<Result<void>> { return Result<void>(); };
   auto result = return_result_result_with_success();
-  ASSERT_TRUE(result);
-  ASSERT_TRUE(*result);
+  ASSERT_RESULT_OK(result);
+  ASSERT_RESULT_OK(*result);
 
   auto inner_result = result.value();
-  ASSERT_TRUE(inner_result);
+  ASSERT_RESULT_OK(inner_result);
 }
 
 TEST(result, result_result_with_failure) {
@@ -299,8 +299,8 @@
     return Result<void>(ResultError("failure string", 6));
   };
   auto result = return_result_result_with_error();
-  ASSERT_TRUE(result);
-  ASSERT_FALSE(*result);
+  ASSERT_RESULT_OK(result);
+  ASSERT_FALSE(result->ok());
   EXPECT_EQ("failure string", (*result).error().message());
   EXPECT_EQ(6, (*result).error().code());
 }
@@ -320,7 +320,7 @@
   };
 
   auto result = return_test_struct();
-  ASSERT_TRUE(result);
+  ASSERT_RESULT_OK(result);
   EXPECT_EQ(36, result->value_);
 }
 
@@ -344,13 +344,13 @@
   errno = 1;
   int old_errno = errno;
   Result<int> result = Error() << "Failed" << SetErrnoToTwo<char>;
-  ASSERT_FALSE(result);
+  ASSERT_FALSE(result.ok());
   EXPECT_EQ(old_errno, errno);
 
   errno = 1;
   old_errno = errno;
   Result<int> result2 = ErrnoError() << "Failed" << SetErrnoToTwo<char>;
-  ASSERT_FALSE(result2);
+  ASSERT_FALSE(result2.ok());
   EXPECT_EQ(old_errno, errno);
   EXPECT_EQ(old_errno, result2.error().code());
 }
@@ -362,7 +362,7 @@
   result = Errorf("{} {}!", std::string("hello"), std::string("world"));
   EXPECT_EQ("hello world!", result.error().message());
 
-  result = Errorf("{h} {w}!", fmt::arg("w", "world"), fmt::arg("h", "hello"));
+  result = Errorf("{1} {0}!", "world", "hello");
   EXPECT_EQ("hello world!", result.error().message());
 
   result = Errorf("hello world!");
diff --git a/base/strings.cpp b/base/strings.cpp
index bb3167e..40b2bf2 100644
--- a/base/strings.cpp
+++ b/base/strings.cpp
@@ -116,5 +116,24 @@
   return lhs.size() == rhs.size() && strncasecmp(lhs.data(), rhs.data(), lhs.size()) == 0;
 }
 
+std::string StringReplace(std::string_view s, std::string_view from, std::string_view to,
+                          bool all) {
+  if (from.empty()) return std::string(s);
+
+  std::string result;
+  std::string_view::size_type start_pos = 0;
+  do {
+    std::string_view::size_type pos = s.find(from, start_pos);
+    if (pos == std::string_view::npos) break;
+
+    result.append(s.data() + start_pos, pos - start_pos);
+    result.append(to.data(), to.size());
+
+    start_pos = pos + from.size();
+  } while (all);
+  result.append(s.data() + start_pos, s.size() - start_pos);
+  return result;
+}
+
 }  // namespace base
 }  // namespace android
diff --git a/base/strings_test.cpp b/base/strings_test.cpp
index ca3c0b8..5ae3094 100644
--- a/base/strings_test.cpp
+++ b/base/strings_test.cpp
@@ -311,3 +311,46 @@
   ASSERT_TRUE(android::base::ConsumeSuffix(&s, ".bar"));
   ASSERT_EQ("foo", s);
 }
+
+TEST(strings, StringReplace_false) {
+  // No change.
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "z", "Z", false));
+  ASSERT_EQ("", android::base::StringReplace("", "z", "Z", false));
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "", "Z", false));
+
+  // Equal lengths.
+  ASSERT_EQ("Abcabc", android::base::StringReplace("abcabc", "a", "A", false));
+  ASSERT_EQ("aBcabc", android::base::StringReplace("abcabc", "b", "B", false));
+  ASSERT_EQ("abCabc", android::base::StringReplace("abcabc", "c", "C", false));
+
+  // Longer replacement.
+  ASSERT_EQ("foobcabc", android::base::StringReplace("abcabc", "a", "foo", false));
+  ASSERT_EQ("afoocabc", android::base::StringReplace("abcabc", "b", "foo", false));
+  ASSERT_EQ("abfooabc", android::base::StringReplace("abcabc", "c", "foo", false));
+
+  // Shorter replacement.
+  ASSERT_EQ("xxyz", android::base::StringReplace("abcxyz", "abc", "x", false));
+  ASSERT_EQ("axyz", android::base::StringReplace("abcxyz", "bcx", "x", false));
+  ASSERT_EQ("abcx", android::base::StringReplace("abcxyz", "xyz", "x", false));
+}
+
+TEST(strings, StringReplace_true) {
+  // No change.
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "z", "Z", true));
+  ASSERT_EQ("", android::base::StringReplace("", "z", "Z", true));
+  ASSERT_EQ("abcabc", android::base::StringReplace("abcabc", "", "Z", true));
+
+  // Equal lengths.
+  ASSERT_EQ("AbcAbc", android::base::StringReplace("abcabc", "a", "A", true));
+  ASSERT_EQ("aBcaBc", android::base::StringReplace("abcabc", "b", "B", true));
+  ASSERT_EQ("abCabC", android::base::StringReplace("abcabc", "c", "C", true));
+
+  // Longer replacement.
+  ASSERT_EQ("foobcfoobc", android::base::StringReplace("abcabc", "a", "foo", true));
+  ASSERT_EQ("afoocafooc", android::base::StringReplace("abcabc", "b", "foo", true));
+  ASSERT_EQ("abfooabfoo", android::base::StringReplace("abcabc", "c", "foo", true));
+
+  // Shorter replacement.
+  ASSERT_EQ("xxyzx", android::base::StringReplace("abcxyzabc", "abc", "x", true));
+  ASSERT_EQ("<xx>", android::base::StringReplace("<abcabc>", "abc", "x", true));
+}
diff --git a/bootstat/Android.bp b/bootstat/Android.bp
index 5e2d171..edff26d 100644
--- a/bootstat/Android.bp
+++ b/bootstat/Android.bp
@@ -30,8 +30,8 @@
         "libbase",
         "libcutils",
         "liblog",
-        "libmetricslogger",
     ],
+    static_libs: ["libgtest_prod"],
 }
 
 // bootstat static library
diff --git a/bootstat/boot_reason_test.sh b/bootstat/boot_reason_test.sh
index 8979b0c..2f2919f 100755
--- a/bootstat/boot_reason_test.sh
+++ b/bootstat/boot_reason_test.sh
@@ -7,7 +7,7 @@
 # - watch adb logcat -b all -d -s bootstat
 # - watch adb logcat -b all -d | audit2allow
 # - wait until screen is up, boot has completed, can mean wait for
-#   sys.boot_completed=1 and sys.logbootcomplete=1 to be true
+#   sys.boot_completed=1 and sys.bootstat.first_boot_completed=1 to be true
 #
 # All test frames, and nothing else, must be function names prefixed and
 # specifiged with the pattern 'test_<test>() {' as this is also how the
@@ -230,16 +230,16 @@
       if [ -n "`get_property sys.boot.reason`" ]
       then
         vals=`get_property |
-              sed -n 's/[[]sys[.]\(boot_completed\|logbootcomplete\)[]]: [[]\([01]\)[]]$/\1=\2/p'`
-        if [ "${vals}" = "`echo boot_completed=1 ; echo logbootcomplete=1`" ]
-        then
-          sleep 1
-          break
-        fi
-        if [ "${vals}" = "`echo logbootcomplete=1 ; echo boot_completed=1`" ]
-        then
-          sleep 1
-          break
+              sed -n 's/[[]sys[.]\(boot_completed\|logbootcomplete\|bootstat[.]first_boot_completed\)[]]: [[]\([01]\)[]]$/\1=\2/p'`
+        if [ X"${vals}" != X"${vals##*boot_completed=1}" ]; then
+          if [ X"${vals}" != X"${vals##*logbootcomple=1}" ]; then
+            sleep 1
+            break
+          fi
+          if [ X"${vals}" != X"${vals##*bootstat.first_boot_completed=1}" ]; then
+            sleep 1
+            break
+          fi
         fi
       fi
     fi
@@ -384,15 +384,15 @@
 init    : processing action (boot) from (/system/etc/init/bootstat.rc
 init    : processing action (ro.boot.bootreason=*) from (/system/etc/init/bootstat.rc
 init    : processing action (ro.boot.bootreason=* && post-fs) from (/system/etc/init/bootstat.rc
-init    : processing action (zygote-start) from (/system/etc/init/bootstat.rc
-init    : processing action (sys.boot_completed=1 && sys.logbootcomplete=1) from (/system/etc/init/bootstat.rc
+init    : processing action (sys.bootstat.first_zygote_start=0 && zygote-start) from (/system/etc/init/bootstat.rc
+init    : processing action (sys.boot_completed=1 && sys.bootstat.first_boot_completed=0) from (/system/etc/init/bootstat.rc
  (/system/bin/bootstat --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l)'
  (/system/bin/bootstat --set_system_boot_reason --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l)'
  (/system/bin/bootstat -r post_decrypt_time_elapsed)'
-init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_complete' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc:
-init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_reason' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc:
-init    : Command 'exec - system log -- /system/bin/bootstat --record_time_since_factory_reset' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc:
-init    : Command 'exec_background - system log -- /system/bin/bootstat --set_system_boot_reason --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l' action=sys.boot_completed=1 && sys.logbootcomplete=1 (/system/etc/init/bootstat.rc
+init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_complete' action=sys.boot_completed=1 && sys.bootstat.first_boot_completed=0 (/system/etc/init/bootstat.rc:
+init    : Command 'exec - system log -- /system/bin/bootstat --record_boot_reason' action=sys.boot_completed=1 && sys.bootstat.first_boot_completed=0 (/system/etc/init/bootstat.rc:
+init    : Command 'exec - system log -- /system/bin/bootstat --record_time_since_factory_reset' action=sys.boot_completed=1 && sys.bootstat.first_boot_completed=0 (/system/etc/init/bootstat.rc:
+init    : Command 'exec_background - system log -- /system/bin/bootstat --set_system_boot_reason --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l' action=sys.boot_completed=1 && sys.bootstat.first_boot_completed=0 (/system/etc/init/bootstat.rc
  (/system/bin/bootstat --record_boot_complete)'...
  (/system/bin/bootstat --record_boot_complete)' (pid${SPACE}
  (/system/bin/bootstat --record_boot_reason)'...
@@ -636,7 +636,7 @@
   rm -r ${ANDROID_PRODUCT_OUT}/obj/ETC/system_build_prop_intermediates ||
     true
   pushd ${ANDROID_BUILD_TOP} >&2
-  make -j50 >&2
+  build/soong/soong_ui.bash --make-mode >&2
   if [ ${?} != 0 ]; then
     popd >&2
     return 1
diff --git a/bootstat/bootstat.cpp b/bootstat/bootstat.cpp
index d08a59f..9ffe5dd 100644
--- a/bootstat/bootstat.cpp
+++ b/bootstat/bootstat.cpp
@@ -32,6 +32,8 @@
 #include <memory>
 #include <regex>
 #include <string>
+#include <string_view>
+#include <unordered_map>
 #include <utility>
 #include <vector>
 
@@ -44,21 +46,138 @@
 #include <android/log.h>
 #include <cutils/android_reboot.h>
 #include <cutils/properties.h>
-#include <metricslogger/metrics_logger.h>
 #include <statslog.h>
 
 #include "boot_event_record_store.h"
 
 namespace {
 
+struct AtomInfo {
+  int32_t atom;
+  int32_t event;
+};
+
+// Maps BootEvent used inside bootstat into statsd atom defined in
+// frameworks/base/cmds/statsd/src/atoms.proto.
+const std::unordered_map<std::string_view, AtomInfo> kBootEventToAtomInfo = {
+    // ELAPSED_TIME
+    {"ro.boottime.init",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__ANDROID_INIT_STAGE_1}},
+    {"boot_complete",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE}},
+    {"boot_decryption_complete",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_ENCRYPTION}},
+    {"boot_complete_no_encryption",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_NO_ENCRYPTION}},
+    {"boot_complete_post_decrypt",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__BOOT_COMPLETE_POST_DECRYPT}},
+    {"factory_reset_boot_complete",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE}},
+    {"factory_reset_boot_complete_no_encryption",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::
+          BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE_NO_ENCRYPTION}},
+    {"factory_reset_boot_complete_post_decrypt",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::
+          BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__FACTORY_RESET_BOOT_COMPLETE_POST_DECRYPT}},
+    {"ota_boot_complete",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE}},
+    {"ota_boot_complete_no_encryption",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE_NO_ENCRYPTION}},
+    {"ota_boot_complete_post_decrypt",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__OTA_BOOT_COMPLETE_POST_DECRYPT}},
+    {"post_decrypt_time_elapsed",
+     {android::util::BOOT_TIME_EVENT_ELAPSED_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_ELAPSED_TIME__EVENT__POST_DECRYPT}},
+    // DURATION
+    {"absolute_boot_time",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__ABSOLUTE_BOOT_TIME}},
+    {"boottime.bootloader.1BLE",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_FIRST_STAGE_EXEC}},
+    {"boottime.bootloader.1BLL",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_FIRST_STAGE_LOAD}},
+    {"boottime.bootloader.KL",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_KERNEL_LOAD}},
+    {"boottime.bootloader.2BLE",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_SECOND_STAGE_EXEC}},
+    {"boottime.bootloader.2BLL",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_SECOND_STAGE_LOAD}},
+    {"boottime.bootloader.SW",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_UI_WAIT}},
+    {"boottime.bootloader.total",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__BOOTLOADER_TOTAL}},
+    {"boottime.init.cold_boot_wait",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__COLDBOOT_WAIT}},
+    {"time_since_factory_reset",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__FACTORY_RESET_TIME_SINCE_RESET}},
+    {"ro.boottime.init.first_stage",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__ANDROID_INIT_STAGE_1}},
+    {"ro.boottime.init.selinux",
+     {android::util::BOOT_TIME_EVENT_DURATION_REPORTED,
+      android::util::BOOT_TIME_EVENT_DURATION__EVENT__SELINUX_INIT}},
+    // UTC_TIME
+    {"factory_reset",
+     {android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RESET_TIME}},
+    {"factory_reset_current_time",
+     {android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_CURRENT_TIME}},
+    {"factory_reset_record_value",
+     {android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED,
+      android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RECORD_VALUE}},
+    // ERROR_CODE
+    {"factory_reset_current_time_failure",
+     {android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED,
+      android::util::BOOT_TIME_EVENT_ERROR_CODE__EVENT__FACTORY_RESET_CURRENT_TIME_FAILURE}},
+};
+
 // Scans the boot event record store for record files and logs each boot event
 // via EventLog.
 void LogBootEvents() {
   BootEventRecordStore boot_event_store;
-
   auto events = boot_event_store.GetAllBootEvents();
-  for (auto i = events.cbegin(); i != events.cend(); ++i) {
-    android::metricslogger::LogHistogram(i->first, i->second);
+  std::vector<std::string_view> notSupportedEvents;
+  for (const auto& event : events) {
+    const auto& name = event.first;
+    const auto& info = kBootEventToAtomInfo.find(name);
+    if (info != kBootEventToAtomInfo.end()) {
+      if (info->second.atom == android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED) {
+        android::util::stats_write(static_cast<int32_t>(info->second.atom),
+                                   static_cast<int32_t>(info->second.event),
+                                   static_cast<int32_t>(event.second));
+      } else {
+        android::util::stats_write(static_cast<int32_t>(info->second.atom),
+                                   static_cast<int32_t>(info->second.event),
+                                   static_cast<int64_t>(event.second));
+      }
+    } else {
+      notSupportedEvents.push_back(name);
+    }
+  }
+  if (!notSupportedEvents.empty()) {
+    LOG(WARNING) << "LogBootEvents, atomInfo not defined for events:"
+                 << android::base::Join(notSupportedEvents, ',');
   }
 }
 
@@ -312,6 +431,11 @@
     {"reboot,unknown[0-9]*", 183},
     {"reboot,longkey,.*", 184},
     {"reboot,boringssl-self-check-failed", 185},
+    {"reboot,userspace_failed,shutdown_aborted", 186},
+    {"reboot,userspace_failed,watchdog_triggered", 187},
+    {"reboot,userspace_failed,watchdog_fork", 188},
+    {"reboot,userspace_failed,*", 189},
+    {"reboot,mount_userdata_failed", 190},
 };
 
 // Converts a string value representing the reason the system booted to an
@@ -1207,13 +1331,17 @@
   const auto reason = android::base::GetProperty(bootloader_reboot_reason_property, "");
 
   if (reason.empty()) {
+    // TODO(b/148575354): Replace with statsd.
     // Log an empty boot reason value as '<EMPTY>' to ensure the value is intentional
     // (and not corruption anywhere else in the reporting pipeline).
-    android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
-                                           android::metricslogger::FIELD_PLATFORM_REASON, "<EMPTY>");
+    // android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
+    //                                        android::metricslogger::FIELD_PLATFORM_REASON,
+    //                                        "<EMPTY>");
   } else {
-    android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
-                                           android::metricslogger::FIELD_PLATFORM_REASON, reason);
+    // TODO(b/148575354): Replace with statsd.
+    // android::metricslogger::LogMultiAction(android::metricslogger::ACTION_BOOT,
+    //                                        android::metricslogger::FIELD_PLATFORM_REASON,
+    //                                        reason);
   }
 
   // Log the raw bootloader_boot_reason property value.
@@ -1242,8 +1370,12 @@
 
   if (current_time_utc < 0) {
     // UMA does not display negative values in buckets, so convert to positive.
-    android::metricslogger::LogHistogram("factory_reset_current_time_failure",
-                                         std::abs(current_time_utc));
+    // Logging via BootEventRecordStore.
+    android::util::stats_write(
+        static_cast<int32_t>(android::util::BOOT_TIME_EVENT_ERROR_CODE_REPORTED),
+        static_cast<int32_t>(
+            android::util::BOOT_TIME_EVENT_ERROR_CODE__EVENT__FACTORY_RESET_CURRENT_TIME_FAILURE),
+        static_cast<int32_t>(std::abs(current_time_utc)));
 
     // Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
     // is losing records somehow.
@@ -1251,7 +1383,11 @@
                                            std::abs(current_time_utc));
     return;
   } else {
-    android::metricslogger::LogHistogram("factory_reset_current_time", current_time_utc);
+    android::util::stats_write(
+        static_cast<int32_t>(android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED),
+        static_cast<int32_t>(
+            android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_CURRENT_TIME),
+        static_cast<int64_t>(current_time_utc));
 
     // Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
     // is losing records somehow.
@@ -1271,7 +1407,11 @@
   // Calculate and record the difference in time between now and the
   // factory_reset time.
   time_t factory_reset_utc = record.second;
-  android::metricslogger::LogHistogram("factory_reset_record_value", factory_reset_utc);
+  android::util::stats_write(
+      static_cast<int32_t>(android::util::BOOT_TIME_EVENT_UTC_TIME_REPORTED),
+      static_cast<int32_t>(
+          android::util::BOOT_TIME_EVENT_UTC_TIME__EVENT__FACTORY_RESET_RECORD_VALUE),
+      static_cast<int64_t>(factory_reset_utc));
 
   // Logging via BootEventRecordStore to see if using android::metricslogger::LogHistogram
   // is losing records somehow.
diff --git a/bootstat/bootstat.rc b/bootstat/bootstat.rc
index 85caf25..a350fe7 100644
--- a/bootstat/bootstat.rc
+++ b/bootstat/bootstat.rc
@@ -50,34 +50,34 @@
 on post-fs-data && property:init.svc.bootanim=running && property:ro.crypto.type=block
     exec_background - system log -- /system/bin/bootstat -r post_decrypt_time_elapsed
 
-# sys.logbootcomplete is a signal to enable the bootstat logging mechanism.
-# This signaling is necessary to prevent logging boot metrics after a runtime
-# restart (e.g., adb shell stop && adb shell start).  /proc/uptime is not reset
-# during a runtime restart, which leads to false boot time metrics being reported.
+# Initialize bootstat state machine.
 #
-# The 'on boot' event occurs once per hard boot (device power on), which
-# switches the flag on. If the device performs a runtime restart, the flag is
-# switched off and cannot be switched on until the device hard boots again.
-
-# Enable bootstat logging on boot.
-on boot
-    setprop sys.logbootcomplete 1
-
-# Disable further bootstat logging on a runtime restart. A runtime restart is
-# signaled by the zygote stopping.
-on property:init.svc.zygote=stopping
-    setprop sys.logbootcomplete 0
+# sys.bootstat.first_boot_completed: responsible for making sure that record_boot_complete happens
+# only once per device hard reboot. Possible values:
+#
+#   sys.bootstat.first_boot_completed=0 - first boot completed trigger wasn't processed yet.
+#   sys.bootstat.first_boot_completed=1 - first boot completed trigger was processed and
+#                                         record_boot_complete was called. Subsequent boot completed
+#                                         triggers (e.g. due to userspace reboot) won't retrigger
+#                                         record_boot_complete
+#
+# IMPORTANT, ro.persistent_properties.ready=1 trigger is used here to ensure that we initialize
+# state machine only once, which as result ensures that bootstat --set_system_boot_reason and
+# bootstat --record_boot_complete will be called only once per full reboot.
+on property:ro.persistent_properties.ready=true
+  setprop sys.bootstat.first_boot_completed 0
 
 # Set boot reason
-on zygote-start
+on property:ro.persistent_properties.ready=true
     # Converts bootloader boot reason and persist.sys.boot.reason to system boot reason
     # Need go after persist peroperties are loaded which is right before zygote-start trigger
     exec_background - system log -- /system/bin/bootstat --set_system_boot_reason
 
 # Record boot complete metrics.
-on property:sys.boot_completed=1 && property:sys.logbootcomplete=1
+on property:sys.boot_completed=1 && property:sys.bootstat.first_boot_completed=0
     # Record boot_complete and related stats (decryption, etc).
     # Record the boot reason.
     # Record time since factory reset.
     # Log all boot events.
     exec_background - system log -- /system/bin/bootstat --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l
+    setprop sys.bootstat.first_boot_completed 1
diff --git a/libmemunreachable/.clang-format b/cli-test/.clang-format
similarity index 100%
copy from libmemunreachable/.clang-format
copy to cli-test/.clang-format
diff --git a/cli-test/Android.bp b/cli-test/Android.bp
new file mode 100644
index 0000000..37a1d1b
--- /dev/null
+++ b/cli-test/Android.bp
@@ -0,0 +1,7 @@
+cc_binary {
+    name: "cli-test",
+    host_supported: true,
+    srcs: ["cli-test.cpp"],
+    cflags: ["-Wall", "-Werror"],
+    shared_libs: ["libbase"],
+}
diff --git a/cli-test/README.md b/cli-test/README.md
new file mode 100644
index 0000000..643eb74
--- /dev/null
+++ b/cli-test/README.md
@@ -0,0 +1,90 @@
+# cli-test
+
+## What?
+
+`cli-test` makes integration testing of command-line tools easier.
+
+## Goals
+
+* Readable syntax. Common cases should be concise, and pretty much anyone
+  should be able to read tests even if they've never seen this tool before.
+
+* Minimal issues with quoting. The toybox tests -- being shell scripts --
+  quickly become a nightmare of quoting. Using a non ad hoc format (such as
+  JSON) would have introduced similar but different quoting issues. A custom
+  format, while annoying, side-steps this.
+
+* Sensible defaults. We expect your exit status to be 0 unless you say
+  otherwise. We expect nothing on stderr unless you say otherwise. And so on.
+
+* Convention over configuration. Related to sensible defaults, we don't let you
+  configure things that aren't absolutely necessary. So you can't keep your test
+  data anywhere except in the `files/` subdirectory of the directory containing
+  your test, for example.
+
+## Non Goals
+
+* Portability. Just being able to run on Linux (host and device) is sufficient
+  for our needs. macOS is probably easy enough if we ever need it, but Windows
+  probably doesn't make sense.
+
+## Syntax
+
+Any all-whitespace line, or line starting with `#` is ignored.
+
+A test looks like this:
+```
+name: unzip -l
+command: unzip -l $FILES/example.zip d1/d2/x.txt
+after: [ ! -f d1/d2/x.txt ]
+expected-stdout:
+	Archive:  $FILES/example.zip
+	  Length      Date    Time    Name
+	---------  ---------- -----   ----
+	     1024  2017-06-04 08:45   d1/d2/x.txt
+	---------                     -------
+	     1024                     1 file
+---
+```
+
+The `name:` line names the test, and is only for human consumption.
+
+The `command:` line is the command to be run. Additional commands can be
+supplied as zero or more `before:` lines (run before `command:`) and zero or
+more `after:` lines (run after `command:`). These are useful for both
+setup/teardown but also for testing post conditions (as in the example above).
+
+Any `command:`, `before:`, or `after:` line is expected to exit with status 0.
+Anything else is considered a test failure.
+
+The `expected-stdout:` line is followed by zero or more tab-prefixed lines that
+are otherwise the exact output expected from the command. (There's magic behind
+the scenes to rewrite the test files directory to `$FILES` because otherwise any
+path in the output would depend on the temporary directory used to run the test.)
+
+There is currently no `expected-stderr:` line. Standard error is implicitly
+expected to be empty, and any output will cause a test failure. (The support is
+there, but not wired up because we haven't needed it yet.)
+
+The fields can appear in any order, but every test must contain at least a
+`name:` line and a `command:` line.
+
+## Output
+
+The output is intended to resemble gtest.
+
+## Future Directions
+
+* It's often useful to be able to *match* against stdout/stderr/a file rather
+  than give exact expected output. We might want to add explicit support for
+  this. In the meantime, it's possible to use an `after:` with `grep -q` if
+  you redirect in your `command:`.
+
+* In addition to using a `before:` (which will fail a test), it can be useful
+  to be able to specify tests that would cause us to *skip* a test. An example
+  would be "am I running as root?".
+
+* It might be useful to be able to make exit status assertions other than 0?
+
+* There's currently no way (other than the `files/` directory) to share repeated
+  setup between tests.
diff --git a/cli-test/cli-test.cpp b/cli-test/cli-test.cpp
new file mode 100644
index 0000000..d6e27ee
--- /dev/null
+++ b/cli-test/cli-test.cpp
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include <libgen.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+#include <android-base/chrono_utils.h>
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/test_utils.h>
+
+// Example:
+
+// name: unzip -n
+// before: mkdir -p d1/d2
+// before: echo b > d1/d2/a.txt
+// command: unzip -q -n $FILES/zip/example.zip d1/d2/a.txt && cat d1/d2/a.txt
+// expected-stdout:
+// 	b
+
+struct Test {
+  std::string test_filename;
+  std::string name;
+  std::string command;
+  std::vector<std::string> befores;
+  std::vector<std::string> afters;
+  std::string expected_stdout;
+  std::string expected_stderr;
+  int exit_status = 0;
+};
+
+static const char* g_progname;
+static bool g_verbose;
+
+static const char* g_file;
+static size_t g_line;
+
+enum Color { kRed, kGreen };
+
+static void Print(Color c, const char* lhs, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  if (isatty(0)) printf("%s", (c == kRed) ? "\e[31m" : "\e[32m");
+  printf("%s%s", lhs, isatty(0) ? "\e[0m" : "");
+  vfprintf(stdout, fmt, ap);
+  putchar('\n');
+  va_end(ap);
+}
+
+static void Die(int error, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  fprintf(stderr, "%s: ", g_progname);
+  vfprintf(stderr, fmt, ap);
+  if (error != 0) fprintf(stderr, ": %s", strerror(error));
+  fprintf(stderr, "\n");
+  va_end(ap);
+  _exit(1);
+}
+
+static void V(const char* fmt, ...) {
+  if (!g_verbose) return;
+
+  va_list ap;
+  va_start(ap, fmt);
+  fprintf(stderr, "           - ");
+  vfprintf(stderr, fmt, ap);
+  fprintf(stderr, "\n");
+  va_end(ap);
+}
+
+static void SetField(const char* what, std::string* field, std::string_view value) {
+  if (!field->empty()) {
+    Die(0, "%s:%zu: %s already set to '%s'", g_file, g_line, what, field->c_str());
+  }
+  field->assign(value);
+}
+
+// Similar to ConsumePrefix, but also trims, so "key:value" and "key: value"
+// are equivalent.
+static bool Match(std::string* s, const std::string& prefix) {
+  if (!android::base::StartsWith(*s, prefix)) return false;
+  s->assign(android::base::Trim(s->substr(prefix.length())));
+  return true;
+}
+
+static void CollectTests(std::vector<Test>* tests, const char* test_filename) {
+  std::string absolute_test_filename;
+  if (!android::base::Realpath(test_filename, &absolute_test_filename)) {
+    Die(errno, "realpath '%s'", test_filename);
+  }
+
+  std::string content;
+  if (!android::base::ReadFileToString(test_filename, &content)) {
+    Die(errno, "couldn't read '%s'", test_filename);
+  }
+
+  size_t count = 0;
+  g_file = test_filename;
+  g_line = 0;
+  auto lines = android::base::Split(content, "\n");
+  std::unique_ptr<Test> test(new Test);
+  while (g_line < lines.size()) {
+    auto line = lines[g_line++];
+    if (line.empty() || line[0] == '#') continue;
+
+    if (line[0] == '-') {
+      if (test->name.empty() || test->command.empty()) {
+        Die(0, "%s:%zu: each test requires both a name and a command", g_file, g_line);
+      }
+      test->test_filename = absolute_test_filename;
+      tests->push_back(*test.release());
+      test.reset(new Test);
+      ++count;
+    } else if (Match(&line, "name:")) {
+      SetField("name", &test->name, line);
+    } else if (Match(&line, "command:")) {
+      SetField("command", &test->command, line);
+    } else if (Match(&line, "before:")) {
+      test->befores.push_back(line);
+    } else if (Match(&line, "after:")) {
+      test->afters.push_back(line);
+    } else if (Match(&line, "expected-stdout:")) {
+      // Collect tab-indented lines.
+      std::string text;
+      while (g_line < lines.size() && !lines[g_line].empty() && lines[g_line][0] == '\t') {
+        text += lines[g_line++].substr(1) + "\n";
+      }
+      SetField("expected stdout", &test->expected_stdout, text);
+    } else {
+      Die(0, "%s:%zu: syntax error: \"%s\"", g_file, g_line, line.c_str());
+    }
+  }
+  if (count == 0) Die(0, "no tests found in '%s'", g_file);
+}
+
+static const char* Plural(size_t n) {
+  return (n == 1) ? "" : "s";
+}
+
+static std::string ExitStatusToString(int status) {
+  if (WIFSIGNALED(status)) {
+    return android::base::StringPrintf("was killed by signal %d (%s)", WTERMSIG(status),
+                                       strsignal(WTERMSIG(status)));
+  }
+  if (WIFSTOPPED(status)) {
+    return android::base::StringPrintf("was stopped by signal %d (%s)", WSTOPSIG(status),
+                                       strsignal(WSTOPSIG(status)));
+  }
+  return android::base::StringPrintf("exited with status %d", WEXITSTATUS(status));
+}
+
+static bool RunCommands(const char* what, const std::vector<std::string>& commands) {
+  bool result = true;
+  for (auto& command : commands) {
+    V("running %s \"%s\"", what, command.c_str());
+    int exit_status = system(command.c_str());
+    if (exit_status != 0) {
+      result = false;
+      fprintf(stderr, "Command (%s) \"%s\" %s\n", what, command.c_str(),
+              ExitStatusToString(exit_status).c_str());
+    }
+  }
+  return result;
+}
+
+static bool CheckOutput(const char* what, std::string actual_output,
+                        const std::string& expected_output, const std::string& FILES) {
+  // Rewrite the output to reverse any expansion of $FILES.
+  actual_output = android::base::StringReplace(actual_output, FILES, "$FILES", true);
+
+  bool result = (actual_output == expected_output);
+  if (!result) {
+    fprintf(stderr, "Incorrect %s.\nExpected:\n%s\nActual:\n%s\n", what, expected_output.c_str(),
+            actual_output.c_str());
+  }
+  return result;
+}
+
+static int RunTests(const std::vector<Test>& tests) {
+  std::vector<std::string> failures;
+
+  Print(kGreen, "[==========]", " Running %zu tests.", tests.size());
+  android::base::Timer total_timer;
+  for (const auto& test : tests) {
+    bool failed = false;
+
+    Print(kGreen, "[ RUN      ]", " %s", test.name.c_str());
+    android::base::Timer test_timer;
+
+    // Set $FILES for this test.
+    std::string FILES = android::base::Dirname(test.test_filename) + "/files";
+    V("setenv(\"FILES\", \"%s\")", FILES.c_str());
+    setenv("FILES", FILES.c_str(), 1);
+
+    // Make a safe space to run the test.
+    TemporaryDir td;
+    V("chdir(\"%s\")", td.path);
+    if (chdir(td.path)) Die(errno, "chdir(\"%s\")", td.path);
+
+    // Perform any setup specified for this test.
+    if (!RunCommands("before", test.befores)) failed = true;
+
+    if (!failed) {
+      V("running command \"%s\"", test.command.c_str());
+      CapturedStdout test_stdout;
+      CapturedStderr test_stderr;
+      int exit_status = system(test.command.c_str());
+      test_stdout.Stop();
+      test_stderr.Stop();
+
+      V("exit status %d", exit_status);
+      if (exit_status != test.exit_status) {
+        failed = true;
+        fprintf(stderr, "Incorrect exit status: expected %d but %s\n", test.exit_status,
+                ExitStatusToString(exit_status).c_str());
+      }
+
+      if (!CheckOutput("stdout", test_stdout.str(), test.expected_stdout, FILES)) failed = true;
+      if (!CheckOutput("stderr", test_stderr.str(), test.expected_stderr, FILES)) failed = true;
+
+      if (!RunCommands("after", test.afters)) failed = true;
+    }
+
+    std::stringstream duration;
+    duration << test_timer;
+    if (failed) {
+      failures.push_back(test.name);
+      Print(kRed, "[  FAILED  ]", " %s (%s)", test.name.c_str(), duration.str().c_str());
+    } else {
+      Print(kGreen, "[       OK ]", " %s (%s)", test.name.c_str(), duration.str().c_str());
+    }
+  }
+
+  // Summarize the whole run and explicitly list all the failures.
+
+  std::stringstream duration;
+  duration << total_timer;
+  Print(kGreen, "[==========]", " %zu tests ran. (%s total)", tests.size(), duration.str().c_str());
+
+  size_t fail_count = failures.size();
+  size_t pass_count = tests.size() - fail_count;
+  Print(kGreen, "[  PASSED  ]", " %zu test%s.", pass_count, Plural(pass_count));
+  if (!failures.empty()) {
+    Print(kRed, "[  FAILED  ]", " %zu test%s.", fail_count, Plural(fail_count));
+    for (auto& failure : failures) {
+      Print(kRed, "[  FAILED  ]", " %s", failure.c_str());
+    }
+  }
+  return (fail_count == 0) ? 0 : 1;
+}
+
+static void ShowHelp(bool full) {
+  fprintf(full ? stdout : stderr, "usage: %s [-v] FILE...\n", g_progname);
+  if (!full) exit(EXIT_FAILURE);
+
+  printf(
+      "\n"
+      "Run tests.\n"
+      "\n"
+      "-v\tVerbose (show workings)\n");
+  exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char* argv[]) {
+  g_progname = basename(argv[0]);
+
+  static const struct option opts[] = {
+      {"help", no_argument, 0, 'h'},
+      {"verbose", no_argument, 0, 'v'},
+      {},
+  };
+
+  int opt;
+  while ((opt = getopt_long(argc, argv, "hv", opts, nullptr)) != -1) {
+    switch (opt) {
+      case 'h':
+        ShowHelp(true);
+        break;
+      case 'v':
+        g_verbose = true;
+        break;
+      default:
+        ShowHelp(false);
+        break;
+    }
+  }
+
+  argv += optind;
+  if (!*argv) Die(0, "no test files provided");
+  std::vector<Test> tests;
+  for (; *argv; ++argv) CollectTests(&tests, *argv);
+  return RunTests(tests);
+}
diff --git a/code_coverage/Android.mk b/code_coverage/Android.mk
new file mode 100644
index 0000000..80ab36b
--- /dev/null
+++ b/code_coverage/Android.mk
@@ -0,0 +1,37 @@
+# policies to allow processes inside minijail to dump code coverage information
+#
+
+LOCAL_PATH := $(call my-dir)
+
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := code_coverage.policy
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MULTILIB := both
+
+ifeq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), arm arm64))
+LOCAL_MODULE_STEM_32 := code_coverage.arm.policy
+LOCAL_MODULE_STEM_64 := code_coverage.arm64.policy
+endif
+
+ifeq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), x86 x86_64))
+LOCAL_MODULE_STEM_32 := code_coverage.x86.policy
+LOCAL_MODULE_STEM_64 := code_coverage.x86_64.policy
+endif
+
+# different files for different configurations
+ifeq ($(NATIVE_COVERAGE),true)
+LOCAL_SRC_FILES_arm := seccomp_policy/code_coverage.arm.policy
+LOCAL_SRC_FILES_arm64 := seccomp_policy/code_coverage.arm64.policy
+LOCAL_SRC_FILES_x86 := seccomp_policy/code_coverage.x86.policy
+LOCAL_SRC_FILES_x86_64 := seccomp_policy/code_coverage.x86_64.policy
+else
+LOCAL_SRC_FILES_arm := empty_policy/code_coverage.arm.policy
+LOCAL_SRC_FILES_arm64 := empty_policy/code_coverage.arm64.policy
+LOCAL_SRC_FILES_x86 := empty_policy/code_coverage.x86.policy
+LOCAL_SRC_FILES_x86_64 := empty_policy/code_coverage.x86_64.policy
+endif
+
+LOCAL_MODULE_TARGET_ARCH := arm arm64 x86 x86_64
+LOCAL_MODULE_PATH := $(TARGET_OUT)/etc/seccomp_policy
+include $(BUILD_PREBUILT)
diff --git a/code_coverage/empty_policy/code_coverage.arm.policy b/code_coverage/empty_policy/code_coverage.arm.policy
new file mode 100644
index 0000000..4c9132b
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.arm.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.arm.policy
diff --git a/code_coverage/empty_policy/code_coverage.arm64.policy b/code_coverage/empty_policy/code_coverage.arm64.policy
new file mode 100644
index 0000000..dc5c35a
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.arm64.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.arm64.policy
diff --git a/code_coverage/empty_policy/code_coverage.x86.policy b/code_coverage/empty_policy/code_coverage.x86.policy
new file mode 100644
index 0000000..044f34c
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.x86.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.x86.policy
diff --git a/code_coverage/empty_policy/code_coverage.x86_64.policy b/code_coverage/empty_policy/code_coverage.x86_64.policy
new file mode 100644
index 0000000..6dcd22d
--- /dev/null
+++ b/code_coverage/empty_policy/code_coverage.x86_64.policy
@@ -0,0 +1,2 @@
+# empty unless code_coverage is enabled.
+# code_coverage.x86_64.policy
diff --git a/code_coverage/seccomp_policy/code_coverage.arm.policy b/code_coverage/seccomp_policy/code_coverage.arm.policy
new file mode 100644
index 0000000..d6784e3
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.arm.policy
@@ -0,0 +1,14 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+gettimeofday: 1
+prctl: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.arm64.policy b/code_coverage/seccomp_policy/code_coverage.arm64.policy
new file mode 100644
index 0000000..4c3dd26
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.arm64.policy
@@ -0,0 +1,13 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
+prctl: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.policy.def b/code_coverage/seccomp_policy/code_coverage.policy.def
new file mode 100644
index 0000000..f136084
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.policy.def
@@ -0,0 +1,51 @@
+// SECCOMP_MODE_STRICT
+//
+// minijail allowances for code coverage
+// this is processed with generate.sh, so we can use appropriate directives
+// size specific: __LP64__ for 64 bit, else 32 bit
+// arch specific: __arm__, __aarch64__, __i386__, __x86_64__
+
+// includes *all* syscalls used during the coverage dumping
+// no skipping just because they might have been in another policy file.
+
+// coverage tool uses different operations on different passes
+// 1st: uses write() to fill the file
+// 2nd-Nth: uses mmap() to update in place
+
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+
+#if     defined(__LP64__)
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
+#else
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+#endif
+
+#if     defined(__arm__)
+gettimeofday: 1
+#endif
+
+#if     defined(__i386__)
+madvise: 1
+#endif
+
+#if     defined(__arm__)
+prctl: 1
+#elif   defined(__aarch64__)
+prctl: 1
+#endif
+
diff --git a/code_coverage/seccomp_policy/code_coverage.x86.policy b/code_coverage/seccomp_policy/code_coverage.x86.policy
new file mode 100644
index 0000000..24ff8b9
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.x86.policy
@@ -0,0 +1,13 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl64: 1
+fstat64: 1
+geteuid32: 1
+_llseek: 1
+mmap2: 1
+sigreturn: 1
+madvise: 1
diff --git a/code_coverage/seccomp_policy/code_coverage.x86_64.policy b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
new file mode 100644
index 0000000..3081036
--- /dev/null
+++ b/code_coverage/seccomp_policy/code_coverage.x86_64.policy
@@ -0,0 +1,12 @@
+close: 1
+mkdirat: 1
+msync: 1
+munmap: 1
+openat: 1
+write: 1
+fcntl: 1
+fstat: 1
+geteuid: 1
+lseek: 1
+mmap: 1
+rt_sigreturn: 1
diff --git a/code_coverage/seccomp_policy/generate.sh b/code_coverage/seccomp_policy/generate.sh
new file mode 100755
index 0000000..ae582c6
--- /dev/null
+++ b/code_coverage/seccomp_policy/generate.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# generate the arch-specific files from the generic one
+
+set -ex
+
+cd "$(dirname "$0")"
+CPP='cpp -undef -E -P code_coverage.policy.def'
+$CPP -D__arm__ -o code_coverage.arm.policy
+$CPP -D__aarch64__ -D__LP64__ -o code_coverage.arm64.policy
+$CPP -D__i386__ -o code_coverage.x86.policy
+$CPP -D__x86_64__ -D__LP64__ -o code_coverage.x86_64.policy
diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index 0602e0a..c8df3e3 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -74,6 +74,7 @@
     header_libs: [
         "libbase_headers",
         "libdebuggerd_common_headers",
+        "bionic_libc_platform_headers",
     ],
 
     whole_static_libs: [
@@ -92,6 +93,9 @@
     defaults: ["debuggerd_defaults"],
     srcs: ["handler/debuggerd_fallback_nop.cpp"],
 
+    header_libs: ["bionic_libc_platform_headers"],
+    export_header_lib_headers: ["bionic_libc_platform_headers"],
+
     whole_static_libs: [
         "libdebuggerd_handler_core",
     ],
@@ -119,6 +123,10 @@
         "liblzma",
         "libcutils",
     ],
+
+    header_libs: ["bionic_libc_platform_headers"],
+    export_header_lib_headers: ["bionic_libc_platform_headers"],
+
     target: {
         recovery: {
             exclude_static_libs: [
@@ -138,15 +146,21 @@
         "util.cpp",
     ],
 
-    header_libs: ["libdebuggerd_common_headers"],
-
     shared_libs: [
         "libbase",
         "libcutils",
         "libprocinfo",
     ],
 
-    export_header_lib_headers: ["libdebuggerd_common_headers"],
+    header_libs: [
+        "libdebuggerd_common_headers",
+        "bionic_libc_platform_headers",
+    ],
+    export_header_lib_headers: [
+        "libdebuggerd_common_headers",
+        "bionic_libc_platform_headers",
+    ],
+
     export_include_dirs: ["include"],
 }
 
@@ -167,6 +181,7 @@
 
     // Needed for private/bionic_fdsan.h
     include_dirs: ["bionic/libc"],
+    header_libs: ["bionic_libc_platform_headers"],
 
     static_libs: [
         "libdexfile_support_static",  // libunwindstack dependency
@@ -176,6 +191,7 @@
         "libcutils",
         "liblog",
     ],
+
     target: {
         recovery: {
             exclude_static_libs: [
@@ -232,6 +248,10 @@
         "libdebuggerd",
     ],
 
+    header_libs: [
+        "bionic_libc_platform_headers",
+    ],
+
     local_include_dirs: [
         "libdebuggerd",
     ],
@@ -277,6 +297,10 @@
         },
     },
 
+    header_libs: [
+        "bionic_libc_platform_headers",
+    ],
+
     static_libs: [
         "libtombstoned_client_static",
         "libdebuggerd",
@@ -317,7 +341,10 @@
     ],
     defaults: ["debuggerd_defaults"],
 
-    header_libs: ["libdebuggerd_common_headers"],
+    header_libs: [
+        "bionic_libc_platform_headers",
+        "libdebuggerd_common_headers"
+    ],
 
     static_libs: [
         "libbase",
@@ -328,7 +355,3 @@
 
     init_rc: ["tombstoned/tombstoned.rc"],
 }
-
-subdirs = [
-    "crasher",
-]
diff --git a/debuggerd/client/debuggerd_client.cpp b/debuggerd/client/debuggerd_client.cpp
index 7e35a2f..5c02738 100644
--- a/debuggerd/client/debuggerd_client.cpp
+++ b/debuggerd/client/debuggerd_client.cpp
@@ -35,6 +35,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <bionic/reserved_signals.h>
 #include <cutils/sockets.h>
 #include <procinfo/process.h>
 
@@ -50,7 +51,7 @@
 using android::base::WriteStringToFd;
 
 static bool send_signal(pid_t pid, const DebuggerdDumpType dump_type) {
-  const int signal = (dump_type == kDebuggerdJavaBacktrace) ? SIGQUIT : DEBUGGER_SIGNAL;
+  const int signal = (dump_type == kDebuggerdJavaBacktrace) ? SIGQUIT : BIONIC_SIGNAL_DEBUGGER;
   sigval val;
   val.sival_int = (dump_type == kDebuggerdNativeBacktrace) ? 1 : 0;
 
diff --git a/debuggerd/crash_dump.cpp b/debuggerd/crash_dump.cpp
index cb55745..e8f366f 100644
--- a/debuggerd/crash_dump.cpp
+++ b/debuggerd/crash_dump.cpp
@@ -40,6 +40,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <bionic/reserved_signals.h>
 #include <cutils/sockets.h>
 #include <log/log.h>
 #include <private/android_filesystem_config.h>
@@ -511,13 +512,13 @@
 
   // Defer the message until later, for readability.
   bool wait_for_gdb = android::base::GetBoolProperty("debug.debuggerd.wait_for_gdb", false);
-  if (siginfo.si_signo == DEBUGGER_SIGNAL) {
+  if (siginfo.si_signo == BIONIC_SIGNAL_DEBUGGER) {
     wait_for_gdb = false;
   }
 
   // Detach from all of our attached threads before resuming.
   for (const auto& [tid, thread] : thread_info) {
-    int resume_signal = thread.signo == DEBUGGER_SIGNAL ? 0 : thread.signo;
+    int resume_signal = thread.signo == BIONIC_SIGNAL_DEBUGGER ? 0 : thread.signo;
     if (wait_for_gdb) {
       resume_signal = 0;
       if (tgkill(target_process, tid, SIGSTOP) != 0) {
@@ -555,10 +556,10 @@
             << " (target tid = " << g_target_thread << ")";
 
   int signo = siginfo.si_signo;
-  bool fatal_signal = signo != DEBUGGER_SIGNAL;
+  bool fatal_signal = signo != BIONIC_SIGNAL_DEBUGGER;
   bool backtrace = false;
 
-  // si_value is special when used with DEBUGGER_SIGNAL.
+  // si_value is special when used with BIONIC_SIGNAL_DEBUGGER.
   //   0: dump tombstone
   //   1: dump backtrace
   if (!fatal_signal) {
diff --git a/debuggerd/crasher/Android.bp b/debuggerd/crasher/Android.bp
index 7bec470..e86f499 100644
--- a/debuggerd/crasher/Android.bp
+++ b/debuggerd/crasher/Android.bp
@@ -44,6 +44,7 @@
     name: "crasher",
 
     defaults: ["crasher-defaults"],
+    header_libs: ["bionic_libc_platform_headers"],
     shared_libs: [
         "libbase",
         "liblog",
@@ -65,6 +66,7 @@
     defaults: ["crasher-defaults"],
     cppflags: ["-DSTATIC_CRASHER"],
     static_executable: true,
+    header_libs: ["bionic_libc_platform_headers"],
     static_libs: [
         "libdebuggerd_handler",
         "libbase",
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index 99729dc..6a8cc56 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -31,6 +31,7 @@
 
 #include <android/fdsan.h>
 #include <android/set_abort_message.h>
+#include <bionic/reserved_signals.h>
 
 #include <android-base/cmsg.h>
 #include <android-base/file.h>
@@ -398,7 +399,7 @@
   unique_fd output_fd;
   StartProcess([]() {
     android_set_abort_message("not actually aborting");
-    raise(DEBUGGER_SIGNAL);
+    raise(BIONIC_SIGNAL_DEBUGGER);
     exit(0);
   });
   StartIntercept(&output_fd);
@@ -466,7 +467,7 @@
 
   sigval val;
   val.sival_int = 1;
-  ASSERT_EQ(0, sigqueue(crasher_pid, DEBUGGER_SIGNAL, val)) << strerror(errno);
+  ASSERT_EQ(0, sigqueue(crasher_pid, BIONIC_SIGNAL_DEBUGGER, val)) << strerror(errno);
   FinishIntercept(&intercept_result);
   ASSERT_EQ(1, intercept_result) << "tombstoned reported failure";
   ConsumeFd(std::move(output_fd), &result);
@@ -734,7 +735,7 @@
 
   siginfo.si_value.sival_int = dump_type == kDebuggerdNativeBacktrace;
 
-  if (syscall(__NR_rt_tgsigqueueinfo, getpid(), gettid(), DEBUGGER_SIGNAL, &siginfo) != 0) {
+  if (syscall(__NR_rt_tgsigqueueinfo, getpid(), gettid(), BIONIC_SIGNAL_DEBUGGER, &siginfo) != 0) {
     PLOG(ERROR) << "libdebuggerd_client: failed to send signal to self";
     return false;
   }
@@ -887,7 +888,7 @@
       errx(2, "first waitpid returned %d (%s), expected failure with ECHILD", rc, strerror(errno));
     }
 
-    raise(DEBUGGER_SIGNAL);
+    raise(BIONIC_SIGNAL_DEBUGGER);
 
     errno = 0;
     rc = TEMP_FAILURE_RETRY(waitpid(-1, &status, __WALL | __WNOTHREAD));
diff --git a/debuggerd/handler/debuggerd_fallback.cpp b/debuggerd/handler/debuggerd_fallback.cpp
index bbec612..9bcbdb3 100644
--- a/debuggerd/handler/debuggerd_fallback.cpp
+++ b/debuggerd/handler/debuggerd_fallback.cpp
@@ -42,6 +42,7 @@
 #include <android-base/file.h>
 #include <android-base/unique_fd.h>
 #include <async_safe/log.h>
+#include <bionic/reserved_signals.h>
 #include <unwindstack/DexFiles.h>
 #include <unwindstack/JitDebug.h>
 #include <unwindstack/Maps.h>
@@ -272,7 +273,7 @@
         siginfo.si_pid = getpid();
         siginfo.si_uid = getuid();
 
-        if (syscall(__NR_rt_tgsigqueueinfo, getpid(), tid, DEBUGGER_SIGNAL, &siginfo) != 0) {
+        if (syscall(__NR_rt_tgsigqueueinfo, getpid(), tid, BIONIC_SIGNAL_DEBUGGER, &siginfo) != 0) {
           async_safe_format_log(ANDROID_LOG_ERROR, "libc", "failed to send trace signal to %d: %s",
                                 tid, strerror(errno));
           return false;
@@ -340,7 +341,7 @@
 
 extern "C" void debuggerd_fallback_handler(siginfo_t* info, ucontext_t* ucontext,
                                            void* abort_message) {
-  if (info->si_signo == DEBUGGER_SIGNAL && info->si_value.sival_ptr != nullptr) {
+  if (info->si_signo == BIONIC_SIGNAL_DEBUGGER && info->si_value.sival_ptr != nullptr) {
     return trace_handler(info, ucontext);
   } else {
     return crash_handler(info, ucontext, abort_message);
diff --git a/debuggerd/handler/debuggerd_handler.cpp b/debuggerd/handler/debuggerd_handler.cpp
index b90ca80..f8192b5 100644
--- a/debuggerd/handler/debuggerd_handler.cpp
+++ b/debuggerd/handler/debuggerd_handler.cpp
@@ -51,6 +51,7 @@
 
 #include <android-base/unique_fd.h>
 #include <async_safe/log.h>
+#include <bionic/reserved_signals.h>
 #include <cutils/properties.h>
 
 #include <libdebuggerd/utility.h>
@@ -175,7 +176,7 @@
     thread_name[MAX_TASK_NAME_LEN] = 0;
   }
 
-  if (info->si_signo == DEBUGGER_SIGNAL) {
+  if (info->si_signo == BIONIC_SIGNAL_DEBUGGER) {
     async_safe_format_log(ANDROID_LOG_INFO, "libc", "Requested dump for tid %d (%s)", __gettid(),
                           thread_name);
     return;
@@ -307,7 +308,7 @@
 static void* pseudothread_stack;
 
 static DebuggerdDumpType get_dump_type(const debugger_thread_info* thread_info) {
-  if (thread_info->siginfo->si_signo == DEBUGGER_SIGNAL &&
+  if (thread_info->siginfo->si_signo == BIONIC_SIGNAL_DEBUGGER &&
       thread_info->siginfo->si_value.sival_int) {
     return kDebuggerdNativeBacktrace;
   }
@@ -429,7 +430,7 @@
     async_safe_format_log(ANDROID_LOG_FATAL, "libc", "crash_dump helper crashed or stopped");
   }
 
-  if (thread_info->siginfo->si_signo != DEBUGGER_SIGNAL) {
+  if (thread_info->siginfo->si_signo != BIONIC_SIGNAL_DEBUGGER) {
     // For crashes, we don't need to minimize pause latency.
     // Wait for the dump to complete before having the process exit, to avoid being murdered by
     // ActivityManager or init.
@@ -446,7 +447,7 @@
   // exited with the correct exit status (e.g. so that sh will report
   // "Segmentation fault" instead of "Killed"). For this to work, we need
   // to deregister our signal handler for that signal before continuing.
-  if (info->si_signo != DEBUGGER_SIGNAL) {
+  if (info->si_signo != BIONIC_SIGNAL_DEBUGGER) {
     signal(info->si_signo, SIG_DFL);
     int rc = syscall(SYS_rt_tgsigqueueinfo, __getpid(), __gettid(), info->si_signo, info);
     if (rc != 0) {
@@ -485,7 +486,7 @@
 
   void* abort_message = nullptr;
   uintptr_t si_val = reinterpret_cast<uintptr_t>(info->si_ptr);
-  if (signal_number == DEBUGGER_SIGNAL) {
+  if (signal_number == BIONIC_SIGNAL_DEBUGGER) {
     if (info->si_code == SI_QUEUE && info->si_pid == __getpid()) {
       // Allow for the abort message to be explicitly specified via the sigqueue value.
       // Keep the bottom bit intact for representing whether we want a backtrace or a tombstone.
@@ -576,7 +577,7 @@
     fatal_errno("failed to restore traceable");
   }
 
-  if (info->si_signo == DEBUGGER_SIGNAL) {
+  if (info->si_signo == BIONIC_SIGNAL_DEBUGGER) {
     // If the signal is fatal, don't unlock the mutex to prevent other crashing threads from
     // starting to dump right before our death.
     pthread_mutex_unlock(&crash_mutex);
@@ -591,19 +592,20 @@
     g_callbacks = *callbacks;
   }
 
-  void* thread_stack_allocation =
-    mmap(nullptr, PAGE_SIZE * 3, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+  size_t thread_stack_pages = 8;
+  void* thread_stack_allocation = mmap(nullptr, PAGE_SIZE * (thread_stack_pages + 2), PROT_NONE,
+                                       MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
   if (thread_stack_allocation == MAP_FAILED) {
     fatal_errno("failed to allocate debuggerd thread stack");
   }
 
   char* stack = static_cast<char*>(thread_stack_allocation) + PAGE_SIZE;
-  if (mprotect(stack, PAGE_SIZE, PROT_READ | PROT_WRITE) != 0) {
+  if (mprotect(stack, PAGE_SIZE * thread_stack_pages, PROT_READ | PROT_WRITE) != 0) {
     fatal_errno("failed to mprotect debuggerd thread stack");
   }
 
   // Stack grows negatively, set it to the last byte in the page...
-  stack = (stack + PAGE_SIZE - 1);
+  stack = (stack + thread_stack_pages * PAGE_SIZE - 1);
   // and align it.
   stack -= 15;
   pseudothread_stack = stack;
diff --git a/debuggerd/include/debuggerd/handler.h b/debuggerd/include/debuggerd/handler.h
index 7196e0a..cd6fc05 100644
--- a/debuggerd/include/debuggerd/handler.h
+++ b/debuggerd/include/debuggerd/handler.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <bionic/reserved_signals.h>
 #include <signal.h>
 #include <stdint.h>
 #include <sys/cdefs.h>
@@ -33,11 +34,11 @@
 void debuggerd_init(debuggerd_callbacks_t* callbacks);
 
 // DEBUGGER_ACTION_DUMP_TOMBSTONE and DEBUGGER_ACTION_DUMP_BACKTRACE are both
-// triggered via DEBUGGER_SIGNAL. The debugger_action_t is sent via si_value
+// triggered via BIONIC_SIGNAL_DEBUGGER. The debugger_action_t is sent via si_value
 // using sigqueue(2) or equivalent. If no si_value is specified (e.g. if the
 // signal is sent by kill(2)), the default behavior is to print the backtrace
 // to the log.
-#define DEBUGGER_SIGNAL (__SIGRTMIN + 3)
+#define DEBUGGER_SIGNAL BIONIC_SIGNAL_DEBUGGER
 
 static void __attribute__((__unused__)) debuggerd_register_handlers(struct sigaction* action) {
   sigaction(SIGABRT, action, nullptr);
@@ -50,7 +51,7 @@
 #endif
   sigaction(SIGSYS, action, nullptr);
   sigaction(SIGTRAP, action, nullptr);
-  sigaction(DEBUGGER_SIGNAL, action, nullptr);
+  sigaction(BIONIC_SIGNAL_DEBUGGER, action, nullptr);
 }
 
 __END_DECLS
diff --git a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
index f189c45..75bac87 100644
--- a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
+++ b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
@@ -20,6 +20,7 @@
 
 #include <inttypes.h>
 #include <signal.h>
+#include <stdarg.h>
 #include <stdbool.h>
 #include <sys/types.h>
 
@@ -71,6 +72,7 @@
 
 // Log information onto the tombstone.
 void _LOG(log_t* log, logtype ltype, const char* fmt, ...) __attribute__((format(printf, 3, 4)));
+void _VLOG(log_t* log, logtype ltype, const char* fmt, va_list ap);
 
 namespace unwindstack {
 class Unwinder;
diff --git a/debuggerd/libdebuggerd/test/tombstone_test.cpp b/debuggerd/libdebuggerd/test/tombstone_test.cpp
index 9dea7ac..b33adf31 100644
--- a/debuggerd/libdebuggerd/test/tombstone_test.cpp
+++ b/debuggerd/libdebuggerd/test/tombstone_test.cpp
@@ -359,467 +359,3 @@
   dump_timestamp(&log_, 0);
   ASSERT_STREQ("Timestamp: 1970-01-01 00:00:00+0000\n", amfd_data_.c_str());
 }
-
-class MemoryPattern : public unwindstack::Memory {
- public:
-  MemoryPattern() = default;
-  virtual ~MemoryPattern() = default;
-
-  size_t Read(uint64_t, void* dst, size_t size) override {
-    uint8_t* data = reinterpret_cast<uint8_t*>(dst);
-    for (size_t i = 0; i < size; i++) {
-      data[i] = (i % 0xff);
-    }
-    return size;
-  }
-};
-
-TEST_F(TombstoneTest, dump_stack_single_frame) {
-  std::vector<unwindstack::FrameData> frames;
-  unwindstack::Maps maps;
-  MemoryPattern memory;
-
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1000, .pc = 0x301000, .sp = 0x2000});
-  dump_stack(&log_, frames, &maps, &memory);
-
-  std::string contents;
-  ASSERT_TRUE(lseek(log_.tfd, 0, SEEK_SET) == 0);
-  ASSERT_TRUE(android::base::ReadFdToString(log_.tfd, &contents));
-
-  std::string expected =
-#if defined(__LP64__)
-      "         0000000000001f80  0706050403020100\n"
-      "         0000000000001f88  0f0e0d0c0b0a0908\n"
-      "         0000000000001f90  1716151413121110\n"
-      "         0000000000001f98  1f1e1d1c1b1a1918\n"
-      "         0000000000001fa0  2726252423222120\n"
-      "         0000000000001fa8  2f2e2d2c2b2a2928\n"
-      "         0000000000001fb0  3736353433323130\n"
-      "         0000000000001fb8  3f3e3d3c3b3a3938\n"
-      "         0000000000001fc0  4746454443424140\n"
-      "         0000000000001fc8  4f4e4d4c4b4a4948\n"
-      "         0000000000001fd0  5756555453525150\n"
-      "         0000000000001fd8  5f5e5d5c5b5a5958\n"
-      "         0000000000001fe0  6766656463626160\n"
-      "         0000000000001fe8  6f6e6d6c6b6a6968\n"
-      "         0000000000001ff0  7776757473727170\n"
-      "         0000000000001ff8  7f7e7d7c7b7a7978\n"
-      "    #00  0000000000002000  0706050403020100\n"
-      "         0000000000002008  0f0e0d0c0b0a0908\n"
-      "         0000000000002010  1716151413121110\n"
-      "         0000000000002018  1f1e1d1c1b1a1918\n"
-      "         0000000000002020  2726252423222120\n"
-      "         0000000000002028  2f2e2d2c2b2a2928\n"
-      "         0000000000002030  3736353433323130\n"
-      "         0000000000002038  3f3e3d3c3b3a3938\n"
-      "         0000000000002040  4746454443424140\n"
-      "         0000000000002048  4f4e4d4c4b4a4948\n"
-      "         0000000000002050  5756555453525150\n"
-      "         0000000000002058  5f5e5d5c5b5a5958\n"
-      "         0000000000002060  6766656463626160\n"
-      "         0000000000002068  6f6e6d6c6b6a6968\n"
-      "         0000000000002070  7776757473727170\n"
-      "         0000000000002078  7f7e7d7c7b7a7978\n";
-#else
-      "         00001fc0  03020100\n"
-      "         00001fc4  07060504\n"
-      "         00001fc8  0b0a0908\n"
-      "         00001fcc  0f0e0d0c\n"
-      "         00001fd0  13121110\n"
-      "         00001fd4  17161514\n"
-      "         00001fd8  1b1a1918\n"
-      "         00001fdc  1f1e1d1c\n"
-      "         00001fe0  23222120\n"
-      "         00001fe4  27262524\n"
-      "         00001fe8  2b2a2928\n"
-      "         00001fec  2f2e2d2c\n"
-      "         00001ff0  33323130\n"
-      "         00001ff4  37363534\n"
-      "         00001ff8  3b3a3938\n"
-      "         00001ffc  3f3e3d3c\n"
-      "    #00  00002000  03020100\n"
-      "         00002004  07060504\n"
-      "         00002008  0b0a0908\n"
-      "         0000200c  0f0e0d0c\n"
-      "         00002010  13121110\n"
-      "         00002014  17161514\n"
-      "         00002018  1b1a1918\n"
-      "         0000201c  1f1e1d1c\n"
-      "         00002020  23222120\n"
-      "         00002024  27262524\n"
-      "         00002028  2b2a2928\n"
-      "         0000202c  2f2e2d2c\n"
-      "         00002030  33323130\n"
-      "         00002034  37363534\n"
-      "         00002038  3b3a3938\n"
-      "         0000203c  3f3e3d3c\n";
-#endif
-  EXPECT_EQ(expected, contents);
-}
-
-TEST_F(TombstoneTest, dump_stack_multiple_frames_same_sp) {
-  std::vector<unwindstack::FrameData> frames;
-  unwindstack::Maps maps;
-  MemoryPattern memory;
-
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1000, .pc = 0x301000, .sp = 0x2000});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x2000});
-  dump_stack(&log_, frames, &maps, &memory);
-
-  std::string contents;
-  ASSERT_TRUE(lseek(log_.tfd, 0, SEEK_SET) == 0);
-  ASSERT_TRUE(android::base::ReadFdToString(log_.tfd, &contents));
-
-  std::string expected =
-#if defined(__LP64__)
-      "         0000000000001f80  0706050403020100\n"
-      "         0000000000001f88  0f0e0d0c0b0a0908\n"
-      "         0000000000001f90  1716151413121110\n"
-      "         0000000000001f98  1f1e1d1c1b1a1918\n"
-      "         0000000000001fa0  2726252423222120\n"
-      "         0000000000001fa8  2f2e2d2c2b2a2928\n"
-      "         0000000000001fb0  3736353433323130\n"
-      "         0000000000001fb8  3f3e3d3c3b3a3938\n"
-      "         0000000000001fc0  4746454443424140\n"
-      "         0000000000001fc8  4f4e4d4c4b4a4948\n"
-      "         0000000000001fd0  5756555453525150\n"
-      "         0000000000001fd8  5f5e5d5c5b5a5958\n"
-      "         0000000000001fe0  6766656463626160\n"
-      "         0000000000001fe8  6f6e6d6c6b6a6968\n"
-      "         0000000000001ff0  7776757473727170\n"
-      "         0000000000001ff8  7f7e7d7c7b7a7978\n"
-      "    #00  0000000000002000  0706050403020100\n"
-      "         ................  ................\n"
-      "    #01  0000000000002000  0706050403020100\n"
-      "         0000000000002008  0f0e0d0c0b0a0908\n"
-      "         0000000000002010  1716151413121110\n"
-      "         0000000000002018  1f1e1d1c1b1a1918\n"
-      "         0000000000002020  2726252423222120\n"
-      "         0000000000002028  2f2e2d2c2b2a2928\n"
-      "         0000000000002030  3736353433323130\n"
-      "         0000000000002038  3f3e3d3c3b3a3938\n"
-      "         0000000000002040  4746454443424140\n"
-      "         0000000000002048  4f4e4d4c4b4a4948\n"
-      "         0000000000002050  5756555453525150\n"
-      "         0000000000002058  5f5e5d5c5b5a5958\n"
-      "         0000000000002060  6766656463626160\n"
-      "         0000000000002068  6f6e6d6c6b6a6968\n"
-      "         0000000000002070  7776757473727170\n"
-      "         0000000000002078  7f7e7d7c7b7a7978\n";
-#else
-      "         00001fc0  03020100\n"
-      "         00001fc4  07060504\n"
-      "         00001fc8  0b0a0908\n"
-      "         00001fcc  0f0e0d0c\n"
-      "         00001fd0  13121110\n"
-      "         00001fd4  17161514\n"
-      "         00001fd8  1b1a1918\n"
-      "         00001fdc  1f1e1d1c\n"
-      "         00001fe0  23222120\n"
-      "         00001fe4  27262524\n"
-      "         00001fe8  2b2a2928\n"
-      "         00001fec  2f2e2d2c\n"
-      "         00001ff0  33323130\n"
-      "         00001ff4  37363534\n"
-      "         00001ff8  3b3a3938\n"
-      "         00001ffc  3f3e3d3c\n"
-      "    #00  00002000  03020100\n"
-      "         ........  ........\n"
-      "    #01  00002000  03020100\n"
-      "         00002004  07060504\n"
-      "         00002008  0b0a0908\n"
-      "         0000200c  0f0e0d0c\n"
-      "         00002010  13121110\n"
-      "         00002014  17161514\n"
-      "         00002018  1b1a1918\n"
-      "         0000201c  1f1e1d1c\n"
-      "         00002020  23222120\n"
-      "         00002024  27262524\n"
-      "         00002028  2b2a2928\n"
-      "         0000202c  2f2e2d2c\n"
-      "         00002030  33323130\n"
-      "         00002034  37363534\n"
-      "         00002038  3b3a3938\n"
-      "         0000203c  3f3e3d3c\n";
-#endif
-  EXPECT_EQ(expected, contents);
-}
-
-TEST_F(TombstoneTest, dump_stack_multiple_frames) {
-  std::vector<unwindstack::FrameData> frames;
-  unwindstack::Maps maps;
-  MemoryPattern memory;
-
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1000, .pc = 0x301000, .sp = 0x2000});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x2010});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x2100});
-  dump_stack(&log_, frames, &maps, &memory);
-
-  std::string contents;
-  ASSERT_TRUE(lseek(log_.tfd, 0, SEEK_SET) == 0);
-  ASSERT_TRUE(android::base::ReadFdToString(log_.tfd, &contents));
-
-  std::string expected =
-#if defined(__LP64__)
-      "         0000000000001f80  0706050403020100\n"
-      "         0000000000001f88  0f0e0d0c0b0a0908\n"
-      "         0000000000001f90  1716151413121110\n"
-      "         0000000000001f98  1f1e1d1c1b1a1918\n"
-      "         0000000000001fa0  2726252423222120\n"
-      "         0000000000001fa8  2f2e2d2c2b2a2928\n"
-      "         0000000000001fb0  3736353433323130\n"
-      "         0000000000001fb8  3f3e3d3c3b3a3938\n"
-      "         0000000000001fc0  4746454443424140\n"
-      "         0000000000001fc8  4f4e4d4c4b4a4948\n"
-      "         0000000000001fd0  5756555453525150\n"
-      "         0000000000001fd8  5f5e5d5c5b5a5958\n"
-      "         0000000000001fe0  6766656463626160\n"
-      "         0000000000001fe8  6f6e6d6c6b6a6968\n"
-      "         0000000000001ff0  7776757473727170\n"
-      "         0000000000001ff8  7f7e7d7c7b7a7978\n"
-      "    #00  0000000000002000  0706050403020100\n"
-      "         0000000000002008  0f0e0d0c0b0a0908\n"
-      "    #01  0000000000002010  0706050403020100\n"
-      "         0000000000002018  0f0e0d0c0b0a0908\n"
-      "         0000000000002020  1716151413121110\n"
-      "         0000000000002028  1f1e1d1c1b1a1918\n"
-      "         0000000000002030  2726252423222120\n"
-      "         0000000000002038  2f2e2d2c2b2a2928\n"
-      "         0000000000002040  3736353433323130\n"
-      "         0000000000002048  3f3e3d3c3b3a3938\n"
-      "         0000000000002050  4746454443424140\n"
-      "         0000000000002058  4f4e4d4c4b4a4948\n"
-      "         0000000000002060  5756555453525150\n"
-      "         0000000000002068  5f5e5d5c5b5a5958\n"
-      "         0000000000002070  6766656463626160\n"
-      "         0000000000002078  6f6e6d6c6b6a6968\n"
-      "         0000000000002080  7776757473727170\n"
-      "         0000000000002088  7f7e7d7c7b7a7978\n"
-      "         ................  ................\n"
-      "    #02  0000000000002100  0706050403020100\n"
-      "         0000000000002108  0f0e0d0c0b0a0908\n"
-      "         0000000000002110  1716151413121110\n"
-      "         0000000000002118  1f1e1d1c1b1a1918\n"
-      "         0000000000002120  2726252423222120\n"
-      "         0000000000002128  2f2e2d2c2b2a2928\n"
-      "         0000000000002130  3736353433323130\n"
-      "         0000000000002138  3f3e3d3c3b3a3938\n"
-      "         0000000000002140  4746454443424140\n"
-      "         0000000000002148  4f4e4d4c4b4a4948\n"
-      "         0000000000002150  5756555453525150\n"
-      "         0000000000002158  5f5e5d5c5b5a5958\n"
-      "         0000000000002160  6766656463626160\n"
-      "         0000000000002168  6f6e6d6c6b6a6968\n"
-      "         0000000000002170  7776757473727170\n"
-      "         0000000000002178  7f7e7d7c7b7a7978\n";
-#else
-      "         00001fc0  03020100\n"
-      "         00001fc4  07060504\n"
-      "         00001fc8  0b0a0908\n"
-      "         00001fcc  0f0e0d0c\n"
-      "         00001fd0  13121110\n"
-      "         00001fd4  17161514\n"
-      "         00001fd8  1b1a1918\n"
-      "         00001fdc  1f1e1d1c\n"
-      "         00001fe0  23222120\n"
-      "         00001fe4  27262524\n"
-      "         00001fe8  2b2a2928\n"
-      "         00001fec  2f2e2d2c\n"
-      "         00001ff0  33323130\n"
-      "         00001ff4  37363534\n"
-      "         00001ff8  3b3a3938\n"
-      "         00001ffc  3f3e3d3c\n"
-      "    #00  00002000  03020100\n"
-      "         00002004  07060504\n"
-      "         00002008  0b0a0908\n"
-      "         0000200c  0f0e0d0c\n"
-      "    #01  00002010  03020100\n"
-      "         00002014  07060504\n"
-      "         00002018  0b0a0908\n"
-      "         0000201c  0f0e0d0c\n"
-      "         00002020  13121110\n"
-      "         00002024  17161514\n"
-      "         00002028  1b1a1918\n"
-      "         0000202c  1f1e1d1c\n"
-      "         00002030  23222120\n"
-      "         00002034  27262524\n"
-      "         00002038  2b2a2928\n"
-      "         0000203c  2f2e2d2c\n"
-      "         00002040  33323130\n"
-      "         00002044  37363534\n"
-      "         00002048  3b3a3938\n"
-      "         0000204c  3f3e3d3c\n"
-      "         ........  ........\n"
-      "    #02  00002100  03020100\n"
-      "         00002104  07060504\n"
-      "         00002108  0b0a0908\n"
-      "         0000210c  0f0e0d0c\n"
-      "         00002110  13121110\n"
-      "         00002114  17161514\n"
-      "         00002118  1b1a1918\n"
-      "         0000211c  1f1e1d1c\n"
-      "         00002120  23222120\n"
-      "         00002124  27262524\n"
-      "         00002128  2b2a2928\n"
-      "         0000212c  2f2e2d2c\n"
-      "         00002130  33323130\n"
-      "         00002134  37363534\n"
-      "         00002138  3b3a3938\n"
-      "         0000213c  3f3e3d3c\n";
-#endif
-  EXPECT_EQ(expected, contents);
-}
-
-TEST_F(TombstoneTest, dump_stack_multiple_frames_disjoint_frames) {
-  std::vector<unwindstack::FrameData> frames;
-  unwindstack::Maps maps;
-  MemoryPattern memory;
-
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1000, .pc = 0x301000, .sp = 0x2000});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x2010});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x1000});
-  frames.push_back(
-      unwindstack::FrameData{.num = 0, .rel_pc = 0x1400, .pc = 0x301400, .sp = 0x1030});
-  dump_stack(&log_, frames, &maps, &memory);
-
-  std::string contents;
-  ASSERT_TRUE(lseek(log_.tfd, 0, SEEK_SET) == 0);
-  ASSERT_TRUE(android::base::ReadFdToString(log_.tfd, &contents));
-
-  std::string expected =
-#if defined(__LP64__)
-      "         0000000000001f80  0706050403020100\n"
-      "         0000000000001f88  0f0e0d0c0b0a0908\n"
-      "         0000000000001f90  1716151413121110\n"
-      "         0000000000001f98  1f1e1d1c1b1a1918\n"
-      "         0000000000001fa0  2726252423222120\n"
-      "         0000000000001fa8  2f2e2d2c2b2a2928\n"
-      "         0000000000001fb0  3736353433323130\n"
-      "         0000000000001fb8  3f3e3d3c3b3a3938\n"
-      "         0000000000001fc0  4746454443424140\n"
-      "         0000000000001fc8  4f4e4d4c4b4a4948\n"
-      "         0000000000001fd0  5756555453525150\n"
-      "         0000000000001fd8  5f5e5d5c5b5a5958\n"
-      "         0000000000001fe0  6766656463626160\n"
-      "         0000000000001fe8  6f6e6d6c6b6a6968\n"
-      "         0000000000001ff0  7776757473727170\n"
-      "         0000000000001ff8  7f7e7d7c7b7a7978\n"
-      "    #00  0000000000002000  0706050403020100\n"
-      "         0000000000002008  0f0e0d0c0b0a0908\n"
-      "    #01  0000000000002010  0706050403020100\n"
-      "         0000000000002018  0f0e0d0c0b0a0908\n"
-      "         0000000000002020  1716151413121110\n"
-      "         0000000000002028  1f1e1d1c1b1a1918\n"
-      "         0000000000002030  2726252423222120\n"
-      "         0000000000002038  2f2e2d2c2b2a2928\n"
-      "         0000000000002040  3736353433323130\n"
-      "         0000000000002048  3f3e3d3c3b3a3938\n"
-      "         0000000000002050  4746454443424140\n"
-      "         0000000000002058  4f4e4d4c4b4a4948\n"
-      "         0000000000002060  5756555453525150\n"
-      "         0000000000002068  5f5e5d5c5b5a5958\n"
-      "         0000000000002070  6766656463626160\n"
-      "         0000000000002078  6f6e6d6c6b6a6968\n"
-      "         0000000000002080  7776757473727170\n"
-      "         0000000000002088  7f7e7d7c7b7a7978\n"
-      "         ................  ................\n"
-      "    #02  0000000000001000  0706050403020100\n"
-      "         0000000000001008  0f0e0d0c0b0a0908\n"
-      "         0000000000001010  1716151413121110\n"
-      "         0000000000001018  1f1e1d1c1b1a1918\n"
-      "         0000000000001020  2726252423222120\n"
-      "         0000000000001028  2f2e2d2c2b2a2928\n"
-      "    #03  0000000000001030  0706050403020100\n"
-      "         0000000000001038  0f0e0d0c0b0a0908\n"
-      "         0000000000001040  1716151413121110\n"
-      "         0000000000001048  1f1e1d1c1b1a1918\n"
-      "         0000000000001050  2726252423222120\n"
-      "         0000000000001058  2f2e2d2c2b2a2928\n"
-      "         0000000000001060  3736353433323130\n"
-      "         0000000000001068  3f3e3d3c3b3a3938\n"
-      "         0000000000001070  4746454443424140\n"
-      "         0000000000001078  4f4e4d4c4b4a4948\n"
-      "         0000000000001080  5756555453525150\n"
-      "         0000000000001088  5f5e5d5c5b5a5958\n"
-      "         0000000000001090  6766656463626160\n"
-      "         0000000000001098  6f6e6d6c6b6a6968\n"
-      "         00000000000010a0  7776757473727170\n"
-      "         00000000000010a8  7f7e7d7c7b7a7978\n";
-#else
-      "         00001fc0  03020100\n"
-      "         00001fc4  07060504\n"
-      "         00001fc8  0b0a0908\n"
-      "         00001fcc  0f0e0d0c\n"
-      "         00001fd0  13121110\n"
-      "         00001fd4  17161514\n"
-      "         00001fd8  1b1a1918\n"
-      "         00001fdc  1f1e1d1c\n"
-      "         00001fe0  23222120\n"
-      "         00001fe4  27262524\n"
-      "         00001fe8  2b2a2928\n"
-      "         00001fec  2f2e2d2c\n"
-      "         00001ff0  33323130\n"
-      "         00001ff4  37363534\n"
-      "         00001ff8  3b3a3938\n"
-      "         00001ffc  3f3e3d3c\n"
-      "    #00  00002000  03020100\n"
-      "         00002004  07060504\n"
-      "         00002008  0b0a0908\n"
-      "         0000200c  0f0e0d0c\n"
-      "    #01  00002010  03020100\n"
-      "         00002014  07060504\n"
-      "         00002018  0b0a0908\n"
-      "         0000201c  0f0e0d0c\n"
-      "         00002020  13121110\n"
-      "         00002024  17161514\n"
-      "         00002028  1b1a1918\n"
-      "         0000202c  1f1e1d1c\n"
-      "         00002030  23222120\n"
-      "         00002034  27262524\n"
-      "         00002038  2b2a2928\n"
-      "         0000203c  2f2e2d2c\n"
-      "         00002040  33323130\n"
-      "         00002044  37363534\n"
-      "         00002048  3b3a3938\n"
-      "         0000204c  3f3e3d3c\n"
-      "         ........  ........\n"
-      "    #02  00001000  03020100\n"
-      "         00001004  07060504\n"
-      "         00001008  0b0a0908\n"
-      "         0000100c  0f0e0d0c\n"
-      "         00001010  13121110\n"
-      "         00001014  17161514\n"
-      "         00001018  1b1a1918\n"
-      "         0000101c  1f1e1d1c\n"
-      "         00001020  23222120\n"
-      "         00001024  27262524\n"
-      "         00001028  2b2a2928\n"
-      "         0000102c  2f2e2d2c\n"
-      "    #03  00001030  03020100\n"
-      "         00001034  07060504\n"
-      "         00001038  0b0a0908\n"
-      "         0000103c  0f0e0d0c\n"
-      "         00001040  13121110\n"
-      "         00001044  17161514\n"
-      "         00001048  1b1a1918\n"
-      "         0000104c  1f1e1d1c\n"
-      "         00001050  23222120\n"
-      "         00001054  27262524\n"
-      "         00001058  2b2a2928\n"
-      "         0000105c  2f2e2d2c\n"
-      "         00001060  33323130\n"
-      "         00001064  37363534\n"
-      "         00001068  3b3a3938\n"
-      "         0000106c  3f3e3d3c\n";
-#endif
-  EXPECT_EQ(expected, contents);
-}
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index da2ba58..4e7f35c 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -52,9 +52,6 @@
 #include <unwindstack/Regs.h>
 #include <unwindstack/Unwinder.h>
 
-// Needed to get DEBUGGER_SIGNAL.
-#include "debuggerd/handler.h"
-
 #include "libdebuggerd/backtrace.h"
 #include "libdebuggerd/open_files_list.h"
 #include "libdebuggerd/utility.h"
@@ -191,106 +188,6 @@
   _LOG(log, logtype::HEADER, "uid: %d\n", thread_info.uid);
 }
 
-static void dump_stack_segment(log_t* log, unwindstack::Maps* maps, unwindstack::Memory* memory,
-                               uint64_t* sp, size_t words, int label) {
-  // Read the data all at once.
-  word_t stack_data[words];
-
-  // TODO: Do we need to word align this for crashes caused by a misaligned sp?
-  //       The process_vm_readv implementation of Memory should handle this appropriately?
-  size_t bytes_read = memory->Read(*sp, stack_data, sizeof(word_t) * words);
-  words = bytes_read / sizeof(word_t);
-  std::string line;
-  for (size_t i = 0; i < words; i++) {
-    line = "    ";
-    if (i == 0 && label >= 0) {
-      // Print the label once.
-      line += StringPrintf("#%02d  ", label);
-    } else {
-      line += "     ";
-    }
-    line += StringPrintf("%" PRIPTR "  %" PRIPTR, *sp, static_cast<uint64_t>(stack_data[i]));
-
-    unwindstack::MapInfo* map_info = maps->Find(stack_data[i]);
-    if (map_info != nullptr && !map_info->name.empty()) {
-      line += "  " + map_info->name;
-      std::string func_name;
-      uint64_t func_offset = 0;
-      if (map_info->GetFunctionName(stack_data[i], &func_name, &func_offset)) {
-        line += " (" + func_name;
-        if (func_offset) {
-          line += StringPrintf("+%" PRIu64, func_offset);
-        }
-        line += ')';
-      }
-    }
-    _LOG(log, logtype::STACK, "%s\n", line.c_str());
-
-    *sp += sizeof(word_t);
-  }
-}
-
-static void dump_stack(log_t* log, const std::vector<unwindstack::FrameData>& frames,
-                       unwindstack::Maps* maps, unwindstack::Memory* memory) {
-  size_t first = 0, last;
-  for (size_t i = 0; i < frames.size(); i++) {
-    if (frames[i].sp) {
-      if (!first) {
-        first = i+1;
-      }
-      last = i;
-    }
-  }
-
-  if (!first) {
-    return;
-  }
-  first--;
-
-  // Dump a few words before the first frame.
-  uint64_t sp = frames[first].sp - STACK_WORDS * sizeof(word_t);
-  dump_stack_segment(log, maps, memory, &sp, STACK_WORDS, -1);
-
-#if defined(__LP64__)
-  static constexpr const char delimiter[] = "         ................  ................\n";
-#else
-  static constexpr const char delimiter[] = "         ........  ........\n";
-#endif
-
-  // Dump a few words from all successive frames.
-  for (size_t i = first; i <= last; i++) {
-    auto* frame = &frames[i];
-    if (sp != frame->sp) {
-      _LOG(log, logtype::STACK, delimiter);
-      sp = frame->sp;
-    }
-    if (i != last) {
-      // Print stack data up to the stack from the next frame.
-      size_t words;
-      uint64_t next_sp = frames[i + 1].sp;
-      if (next_sp < sp) {
-        // The next frame is probably using a completely different stack,
-        // so dump the max from this stack.
-        words = STACK_WORDS;
-      } else {
-        words = (next_sp - sp) / sizeof(word_t);
-        if (words == 0) {
-          // The sp is the same as the next frame, print at least
-          // one line for this frame.
-          words = 1;
-        } else if (words > STACK_WORDS) {
-          words = STACK_WORDS;
-        }
-      }
-      dump_stack_segment(log, maps, memory, &sp, words, i);
-    } else {
-      // Print some number of words past the last stack frame since we
-      // don't know how large the stack is.
-      dump_stack_segment(log, maps, memory, &sp, STACK_WORDS, i);
-    }
-  }
-}
-
 static std::string get_addr_string(uint64_t addr) {
   std::string addr_str;
 #if defined(__LP64__)
@@ -428,7 +325,7 @@
   std::vector<std::pair<std::string, uint64_t>> special_row;
 
 #if defined(__arm__) || defined(__aarch64__)
-  static constexpr const char* special_registers[] = {"ip", "lr", "sp", "pc"};
+  static constexpr const char* special_registers[] = {"ip", "lr", "sp", "pc", "pst"};
 #elif defined(__i386__)
   static constexpr const char* special_registers[] = {"ebp", "esp", "eip"};
 #elif defined(__x86_64__)
@@ -502,9 +399,6 @@
   } else {
     _LOG(log, logtype::BACKTRACE, "\nbacktrace:\n");
     log_backtrace(log, unwinder, "    ");
-
-    _LOG(log, logtype::STACK, "\nstack:\n");
-    dump_stack(log, unwinder->frames(), unwinder->GetMaps(), unwinder->GetProcessMemory().get());
   }
 
   if (primary_thread) {
@@ -595,7 +489,7 @@
       }
       AndroidLogEntry e;
       char buf[512];
-      if (android_log_processBinaryLogBuffer(&log_entry.entry_v1, &e, g_eventTagMap, buf,
+      if (android_log_processBinaryLogBuffer(&log_entry.entry, &e, g_eventTagMap, buf,
                                              sizeof(buf)) == 0) {
         _LOG(log, logtype::LOGS, "%s.%03d %5d %5d %c %-8.*s: %s\n", timeBuf,
              log_entry.entry.nsec / 1000000, log_entry.entry.pid, log_entry.entry.tid, 'I',
diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index 9b2779a..0a1d2a4 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -35,6 +35,7 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <bionic/reserved_signals.h>
 #include <debuggerd/handler.h>
 #include <log/log.h>
 #include <unwindstack/Memory.h>
@@ -67,6 +68,14 @@
 
 __attribute__((__weak__, visibility("default")))
 void _LOG(log_t* log, enum logtype ltype, const char* fmt, ...) {
+  va_list ap;
+  va_start(ap, fmt);
+  _VLOG(log, ltype, fmt, ap);
+  va_end(ap);
+}
+
+__attribute__((__weak__, visibility("default")))
+void _VLOG(log_t* log, enum logtype ltype, const char* fmt, va_list ap) {
   bool write_to_tombstone = (log->tfd != -1);
   bool write_to_logcat = is_allowed_in_logcat(ltype)
                       && log->crashed_tid != -1
@@ -75,10 +84,7 @@
   static bool write_to_kmsg = should_write_to_kmsg();
 
   std::string msg;
-  va_list ap;
-  va_start(ap, fmt);
   android::base::StringAppendV(&msg, fmt, ap);
-  va_end(ap);
 
   if (msg.empty()) return;
 
@@ -291,7 +297,8 @@
     case SIGSTOP: return "SIGSTOP";
     case SIGSYS: return "SIGSYS";
     case SIGTRAP: return "SIGTRAP";
-    case DEBUGGER_SIGNAL: return "<debuggerd signal>";
+    case BIONIC_SIGNAL_DEBUGGER:
+      return "<debuggerd signal>";
     default: return "?";
   }
 }
diff --git a/deprecated-adf/Android.bp b/deprecated-adf/Android.bp
deleted file mode 100644
index b44c296..0000000
--- a/deprecated-adf/Android.bp
+++ /dev/null
@@ -1 +0,0 @@
-subdirs = ["*"]
diff --git a/deprecated-adf/libadf/Android.bp b/deprecated-adf/libadf/Android.bp
index 49e3721..70f0a3b 100644
--- a/deprecated-adf/libadf/Android.bp
+++ b/deprecated-adf/libadf/Android.bp
@@ -24,5 +24,3 @@
     local_include_dirs: ["include"],
     export_include_dirs: ["include"],
 }
-
-subdirs = ["tests"]
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index f452a64..a757d56 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -122,6 +122,7 @@
 
     shared_libs: [
         "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
         "android.hardware.fastboot@1.0",
         "android.hardware.health@2.0",
         "libadbd",
@@ -136,12 +137,14 @@
         "libhidlbase",
         "liblog",
         "liblp",
+        "libprotobuf-cpp-lite",
         "libsparse",
         "libutils",
     ],
 
     static_libs: [
         "libhealthhalutils",
+        "libsnapshot_nobinder",
     ],
 
     header_libs: [
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 17ec392..fd009e7 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -18,9 +18,9 @@
 # Package fastboot-related executables.
 #
 
-my_dist_files := $(HOST_OUT_EXECUTABLES)/mke2fs
-my_dist_files += $(HOST_OUT_EXECUTABLES)/e2fsdroid
-my_dist_files += $(HOST_OUT_EXECUTABLES)/make_f2fs
-my_dist_files += $(HOST_OUT_EXECUTABLES)/sload_f2fs
+my_dist_files := $(SOONG_HOST_OUT_EXECUTABLES)/mke2fs
+my_dist_files += $(SOONG_HOST_OUT_EXECUTABLES)/e2fsdroid
+my_dist_files += $(SOONG_HOST_OUT_EXECUTABLES)/make_f2fs
+my_dist_files += $(SOONG_HOST_OUT_EXECUTABLES)/sload_f2fs
 $(call dist-for-goals,dist_files sdk win_sdk,$(my_dist_files))
 my_dist_files :=
diff --git a/fastboot/constants.h b/fastboot/constants.h
index 8a72627..ba43ca5 100644
--- a/fastboot/constants.h
+++ b/fastboot/constants.h
@@ -34,6 +34,7 @@
 #define FB_CMD_UPDATE_SUPER "update-super"
 #define FB_CMD_OEM "oem"
 #define FB_CMD_GSI "gsi"
+#define FB_CMD_SNAPSHOT_UPDATE "snapshot-update"
 
 #define RESPONSE_OKAY "OKAY"
 #define RESPONSE_FAIL "FAIL"
@@ -41,11 +42,13 @@
 #define RESPONSE_INFO "INFO"
 
 #define FB_COMMAND_SZ 64
-#define FB_RESPONSE_SZ 64
+#define FB_RESPONSE_SZ 256
 
 #define FB_VAR_VERSION "version"
 #define FB_VAR_VERSION_BOOTLOADER "version-bootloader"
 #define FB_VAR_VERSION_BASEBAND "version-baseband"
+#define FB_VAR_VERSION_OS "version-os"
+#define FB_VAR_VERSION_VNDK "version-vndk"
 #define FB_VAR_PRODUCT "product"
 #define FB_VAR_SERIALNO "serialno"
 #define FB_VAR_SECURE "secure"
@@ -66,3 +69,11 @@
 #define FB_VAR_BATTERY_VOLTAGE "battery-voltage"
 #define FB_VAR_BATTERY_SOC_OK "battery-soc-ok"
 #define FB_VAR_SUPER_PARTITION_NAME "super-partition-name"
+#define FB_VAR_SNAPSHOT_UPDATE_STATUS "snapshot-update-status"
+#define FB_VAR_CPU_ABI "cpu-abi"
+#define FB_VAR_SYSTEM_FINGERPRINT "system-fingerprint"
+#define FB_VAR_VENDOR_FINGERPRINT "vendor-fingerprint"
+#define FB_VAR_DYNAMIC_PARTITION "dynamic-partition"
+#define FB_VAR_FIRST_API_LEVEL "first-api-level"
+#define FB_VAR_SECURITY_PATCH_LEVEL "security-patch-level"
+#define FB_VAR_TREBLE_ENABLED "treble-enabled"
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index 4c77c75..2c9dec9 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -19,19 +19,22 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 
+#include <unordered_set>
+
 #include <android-base/logging.h>
 #include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <cutils/android_reboot.h>
 #include <ext4_utils/wipe.h>
 #include <fs_mgr.h>
-#include <fs_mgr/roots.h>
 #include <libgsi/libgsi.h>
 #include <liblp/builder.h>
 #include <liblp/liblp.h>
+#include <libsnapshot/snapshot.h>
 #include <uuid/uuid.h>
 
 #include "constants.h"
@@ -44,8 +47,11 @@
 using ::android::hardware::boot::V1_0::BoolResult;
 using ::android::hardware::boot::V1_0::CommandResult;
 using ::android::hardware::boot::V1_0::Slot;
+using ::android::hardware::boot::V1_1::MergeStatus;
 using ::android::hardware::fastboot::V1_0::Result;
 using ::android::hardware::fastboot::V1_0::Status;
+using android::snapshot::SnapshotManager;
+using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl;
 
 struct VariableHandlers {
     // Callback to retrieve the value of a single variable.
@@ -54,6 +60,24 @@
     std::function<std::vector<std::vector<std::string>>(FastbootDevice*)> get_all_args;
 };
 
+static bool IsSnapshotUpdateInProgress(FastbootDevice* device) {
+    auto hal = device->boot1_1();
+    if (!hal) {
+        return false;
+    }
+    auto merge_status = hal->getSnapshotMergeStatus();
+    return merge_status == MergeStatus::SNAPSHOTTED || merge_status == MergeStatus::MERGING;
+}
+
+static bool IsProtectedPartitionDuringMerge(FastbootDevice* device, const std::string& name) {
+    static const std::unordered_set<std::string> ProtectedPartitionsDuringMerge = {
+            "userdata", "metadata", "misc"};
+    if (ProtectedPartitionsDuringMerge.count(name) == 0) {
+        return false;
+    }
+    return IsSnapshotUpdateInProgress(device);
+}
+
 static void GetAllVars(FastbootDevice* device, const std::string& name,
                        const VariableHandlers& handlers) {
     if (!handlers.get_all_args) {
@@ -82,6 +106,8 @@
             {FB_VAR_VERSION, {GetVersion, nullptr}},
             {FB_VAR_VERSION_BOOTLOADER, {GetBootloaderVersion, nullptr}},
             {FB_VAR_VERSION_BASEBAND, {GetBasebandVersion, nullptr}},
+            {FB_VAR_VERSION_OS, {GetOsVersion, nullptr}},
+            {FB_VAR_VERSION_VNDK, {GetVndkVersion, nullptr}},
             {FB_VAR_PRODUCT, {GetProduct, nullptr}},
             {FB_VAR_SERIALNO, {GetSerial, nullptr}},
             {FB_VAR_VARIANT, {GetVariant, nullptr}},
@@ -101,7 +127,15 @@
             {FB_VAR_BATTERY_VOLTAGE, {GetBatteryVoltage, nullptr}},
             {FB_VAR_BATTERY_SOC_OK, {GetBatterySoCOk, nullptr}},
             {FB_VAR_HW_REVISION, {GetHardwareRevision, nullptr}},
-            {FB_VAR_SUPER_PARTITION_NAME, {GetSuperPartitionName, nullptr}}};
+            {FB_VAR_SUPER_PARTITION_NAME, {GetSuperPartitionName, nullptr}},
+            {FB_VAR_SNAPSHOT_UPDATE_STATUS, {GetSnapshotUpdateStatus, nullptr}},
+            {FB_VAR_CPU_ABI, {GetCpuAbi, nullptr}},
+            {FB_VAR_SYSTEM_FINGERPRINT, {GetSystemFingerprint, nullptr}},
+            {FB_VAR_VENDOR_FINGERPRINT, {GetVendorFingerprint, nullptr}},
+            {FB_VAR_DYNAMIC_PARTITION, {GetDynamicPartition, nullptr}},
+            {FB_VAR_FIRST_API_LEVEL, {GetFirstApiLevel, nullptr}},
+            {FB_VAR_SECURITY_PATCH_LEVEL, {GetSecurityPatchLevel, nullptr}},
+            {FB_VAR_TREBLE_ENABLED, {GetTrebleEnabled, nullptr}}};
 
     if (args.size() < 2) {
         return device->WriteFail("Missing argument");
@@ -138,8 +172,14 @@
         return device->WriteStatus(FastbootResult::FAIL, "Erase is not allowed on locked devices");
     }
 
+    const auto& partition_name = args[1];
+    if (IsProtectedPartitionDuringMerge(device, partition_name)) {
+        auto message = "Cannot erase " + partition_name + " while a snapshot update is in progress";
+        return device->WriteFail(message);
+    }
+
     PartitionHandle handle;
-    if (!OpenPartition(device, args[1], &handle)) {
+    if (!OpenPartition(device, partition_name, &handle)) {
         return device->WriteStatus(FastbootResult::FAIL, "Partition doesn't exist");
     }
     if (wipe_block_device(handle.fd(), get_block_device_size(handle.fd())) == 0) {
@@ -204,9 +244,9 @@
                                    "set_active command is not allowed on locked devices");
     }
 
-    // Slot suffix needs to be between 'a' and 'z'.
     Slot slot;
     if (!GetSlotNumber(args[1], &slot)) {
+        // Slot suffix needs to be between 'a' and 'z'.
         return device->WriteStatus(FastbootResult::FAIL, "Bad slot suffix");
     }
 
@@ -219,6 +259,32 @@
     if (slot >= boot_control_hal->getNumberSlots()) {
         return device->WriteStatus(FastbootResult::FAIL, "Slot out of range");
     }
+
+    // If the slot is not changing, do nothing.
+    if (slot == boot_control_hal->getCurrentSlot()) {
+        return device->WriteOkay("");
+    }
+
+    // Check how to handle the current snapshot state.
+    if (auto hal11 = device->boot1_1()) {
+        auto merge_status = hal11->getSnapshotMergeStatus();
+        if (merge_status == MergeStatus::MERGING) {
+            return device->WriteFail("Cannot change slots while a snapshot update is in progress");
+        }
+        // Note: we allow the slot change if the state is SNAPSHOTTED. First-
+        // stage init does not have access to the HAL, and uses the slot number
+        // and /metadata OTA state to determine whether a slot change occurred.
+        // Booting into the old slot would erase the OTA, and switching A->B->A
+        // would simply resume it if no boots occur in between. Re-flashing
+        // partitions implicitly cancels the OTA, so leaving the state as-is is
+        // safe.
+        if (merge_status == MergeStatus::SNAPSHOTTED) {
+            device->WriteInfo(
+                    "Changing the active slot with a snapshot applied may cancel the"
+                    " update.");
+        }
+    }
+
     CommandResult ret;
     auto cb = [&ret](CommandResult result) { ret = result; };
     auto result = boot_control_hal->setActiveBootSlot(slot, cb);
@@ -462,6 +528,11 @@
     }
 
     const auto& partition_name = args[1];
+    if (IsProtectedPartitionDuringMerge(device, partition_name)) {
+        auto message = "Cannot flash " + partition_name + " while a snapshot update is in progress";
+        return device->WriteFail(message);
+    }
+
     if (LogicalPartitionExists(device, partition_name)) {
         CancelPartitionSnapshot(device, partition_name);
     }
@@ -486,42 +557,6 @@
     return UpdateSuper(device, args[1], wipe);
 }
 
-class AutoMountMetadata {
-  public:
-    AutoMountMetadata() {
-        android::fs_mgr::Fstab proc_mounts;
-        if (!ReadFstabFromFile("/proc/mounts", &proc_mounts)) {
-            LOG(ERROR) << "Could not read /proc/mounts";
-            return;
-        }
-
-        auto iter = std::find_if(proc_mounts.begin(), proc_mounts.end(),
-                [](const auto& entry) { return entry.mount_point == "/metadata"; });
-        if (iter != proc_mounts.end()) {
-            mounted_ = true;
-            return;
-        }
-
-        if (!ReadDefaultFstab(&fstab_)) {
-            LOG(ERROR) << "Could not read default fstab";
-            return;
-        }
-        mounted_ = EnsurePathMounted(&fstab_, "/metadata");
-        should_unmount_ = true;
-    }
-    ~AutoMountMetadata() {
-        if (mounted_ && should_unmount_) {
-            EnsurePathUnmounted(&fstab_, "/metadata");
-        }
-    }
-    explicit operator bool() const { return mounted_; }
-
-  private:
-    android::fs_mgr::Fstab fstab_;
-    bool mounted_ = false;
-    bool should_unmount_ = false;
-};
-
 bool GsiHandler(FastbootDevice* device, const std::vector<std::string>& args) {
     if (args.size() != 2) {
         return device->WriteFail("Invalid arguments");
@@ -547,3 +582,53 @@
     }
     return device->WriteStatus(FastbootResult::OKAY, "Success");
 }
+
+bool SnapshotUpdateHandler(FastbootDevice* device, const std::vector<std::string>& args) {
+    // Note that we use the HAL rather than mounting /metadata, since we want
+    // our results to match the bootloader.
+    auto hal = device->boot1_1();
+    if (!hal) return device->WriteFail("Not supported");
+
+    // If no arguments, return the same thing as a getvar. Note that we get the
+    // HAL first so we can return "not supported" before we return the less
+    // specific error message below.
+    if (args.size() < 2 || args[1].empty()) {
+        std::string message;
+        if (!GetSnapshotUpdateStatus(device, {}, &message)) {
+            return device->WriteFail("Could not determine update status");
+        }
+        device->WriteInfo(message);
+        return device->WriteOkay("");
+    }
+
+    MergeStatus status = hal->getSnapshotMergeStatus();
+
+    if (args.size() != 2) {
+        return device->WriteFail("Invalid arguments");
+    }
+    if (args[1] == "cancel") {
+        switch (status) {
+            case MergeStatus::SNAPSHOTTED:
+            case MergeStatus::MERGING:
+                hal->setSnapshotMergeStatus(MergeStatus::CANCELLED);
+                break;
+            default:
+                break;
+        }
+    } else if (args[1] == "merge") {
+        if (status != MergeStatus::MERGING) {
+            return device->WriteFail("No snapshot merge is in progress");
+        }
+
+        auto sm = SnapshotManager::NewForFirstStageMount();
+        if (!sm) {
+            return device->WriteFail("Unable to create SnapshotManager");
+        }
+        if (!sm->HandleImminentDataWipe()) {
+            return device->WriteFail("Unable to finish snapshot merge");
+        }
+    } else {
+        return device->WriteFail("Invalid parameter to snapshot-update");
+    }
+    return device->WriteStatus(FastbootResult::OKAY, "Success");
+}
diff --git a/fastboot/device/commands.h b/fastboot/device/commands.h
index afd6d08..c1324bc 100644
--- a/fastboot/device/commands.h
+++ b/fastboot/device/commands.h
@@ -19,7 +19,7 @@
 #include <string>
 #include <vector>
 
-constexpr unsigned int kMaxDownloadSizeDefault = 0x20000000;
+constexpr unsigned int kMaxDownloadSizeDefault = 0x10000000;
 
 class FastbootDevice;
 
@@ -49,3 +49,4 @@
 bool UpdateSuperHandler(FastbootDevice* device, const std::vector<std::string>& args);
 bool OemCmdHandler(FastbootDevice* device, const std::vector<std::string>& args);
 bool GsiHandler(FastbootDevice* device, const std::vector<std::string>& args);
+bool SnapshotUpdateHandler(FastbootDevice* device, const std::vector<std::string>& args);
diff --git a/fastboot/device/fastboot_device.cpp b/fastboot/device/fastboot_device.cpp
index 56fafab..31fc359 100644
--- a/fastboot/device/fastboot_device.cpp
+++ b/fastboot/device/fastboot_device.cpp
@@ -54,12 +54,17 @@
               {FB_CMD_UPDATE_SUPER, UpdateSuperHandler},
               {FB_CMD_OEM, OemCmdHandler},
               {FB_CMD_GSI, GsiHandler},
+              {FB_CMD_SNAPSHOT_UPDATE, SnapshotUpdateHandler},
       }),
       transport_(std::make_unique<ClientUsbTransport>()),
       boot_control_hal_(IBootControl::getService()),
       health_hal_(get_health_service()),
       fastboot_hal_(IFastboot::getService()),
-      active_slot_("") {}
+      active_slot_("") {
+    if (boot_control_hal_) {
+        boot1_1_ = android::hardware::boot::V1_1::IBootControl::castFrom(boot_control_hal_);
+    }
+}
 
 FastbootDevice::~FastbootDevice() {
     CloseDevice();
diff --git a/fastboot/device/fastboot_device.h b/fastboot/device/fastboot_device.h
index 091aadf..bbe8172 100644
--- a/fastboot/device/fastboot_device.h
+++ b/fastboot/device/fastboot_device.h
@@ -23,6 +23,7 @@
 #include <vector>
 
 #include <android/hardware/boot/1.0/IBootControl.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <android/hardware/fastboot/1.0/IFastboot.h>
 #include <android/hardware/health/2.0/IHealth.h>
 
@@ -51,6 +52,7 @@
     android::sp<android::hardware::boot::V1_0::IBootControl> boot_control_hal() {
         return boot_control_hal_;
     }
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot1_1() { return boot1_1_; }
     android::sp<android::hardware::fastboot::V1_0::IFastboot> fastboot_hal() {
         return fastboot_hal_;
     }
@@ -63,6 +65,7 @@
 
     std::unique_ptr<Transport> transport_;
     android::sp<android::hardware::boot::V1_0::IBootControl> boot_control_hal_;
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot1_1_;
     android::sp<android::hardware::health::V2_0::IHealth> health_hal_;
     android::sp<android::hardware::fastboot::V1_0::IFastboot> fastboot_hal_;
     std::vector<char> download_data_;
diff --git a/fastboot/device/flashing.cpp b/fastboot/device/flashing.cpp
index 102ebdb..7e7e507 100644
--- a/fastboot/device/flashing.cpp
+++ b/fastboot/device/flashing.cpp
@@ -21,6 +21,7 @@
 
 #include <algorithm>
 #include <memory>
+#include <optional>
 #include <set>
 #include <string>
 
@@ -56,6 +57,7 @@
     Fstab fstab;
     ReadDefaultFstab(&fstab);
 
+    std::optional<AutoMountMetadata> mount_metadata;
     for (const auto& entry : fstab) {
         auto partition = android::base::Basename(entry.mount_point);
         if ("/" == entry.mount_point) {
@@ -63,6 +65,7 @@
         }
 
         if ((partition + device->GetCurrentSlot()) == partition_name) {
+            mount_metadata.emplace();
             fs_mgr_overlayfs_teardown(entry.mount_point.c_str());
         }
     }
diff --git a/fastboot/device/usb_client.cpp b/fastboot/device/usb_client.cpp
index 5066046..9c80765 100644
--- a/fastboot/device/usb_client.cpp
+++ b/fastboot/device/usb_client.cpp
@@ -297,3 +297,7 @@
     CloseFunctionFs(handle_.get());
     return 0;
 }
+
+int ClientUsbTransport::Reset() {
+    return 0;
+}
diff --git a/fastboot/device/usb_client.h b/fastboot/device/usb_client.h
index 3694f9a..e6a1a8b 100644
--- a/fastboot/device/usb_client.h
+++ b/fastboot/device/usb_client.h
@@ -29,6 +29,7 @@
     ssize_t Read(void* data, size_t len) override;
     ssize_t Write(const void* data, size_t len) override;
     int Close() override;
+    int Reset() override;
 
   private:
     std::unique_ptr<usb_handle> handle_;
diff --git a/fastboot/device/utility.cpp b/fastboot/device/utility.cpp
index b3f2d5f..7c6ac89 100644
--- a/fastboot/device/utility.cpp
+++ b/fastboot/device/utility.cpp
@@ -26,6 +26,7 @@
 #include <android-base/properties.h>
 #include <android-base/strings.h>
 #include <fs_mgr.h>
+#include <fs_mgr/roots.h>
 #include <fs_mgr_dm_linear.h>
 #include <liblp/builder.h>
 #include <liblp/liblp.h>
@@ -240,3 +241,29 @@
     }
     return current_slot_suffix;
 }
+
+AutoMountMetadata::AutoMountMetadata() {
+    android::fs_mgr::Fstab proc_mounts;
+    if (!ReadFstabFromFile("/proc/mounts", &proc_mounts)) {
+        LOG(ERROR) << "Could not read /proc/mounts";
+        return;
+    }
+
+    if (GetEntryForMountPoint(&proc_mounts, "/metadata")) {
+        mounted_ = true;
+        return;
+    }
+
+    if (!ReadDefaultFstab(&fstab_)) {
+        LOG(ERROR) << "Could not read default fstab";
+        return;
+    }
+    mounted_ = EnsurePathMounted(&fstab_, "/metadata");
+    should_unmount_ = true;
+}
+
+AutoMountMetadata::~AutoMountMetadata() {
+    if (mounted_ && should_unmount_) {
+        EnsurePathUnmounted(&fstab_, "/metadata");
+    }
+}
diff --git a/fastboot/device/utility.h b/fastboot/device/utility.h
index bfeeb74..3b71ef0 100644
--- a/fastboot/device/utility.h
+++ b/fastboot/device/utility.h
@@ -20,6 +20,7 @@
 
 #include <android-base/unique_fd.h>
 #include <android/hardware/boot/1.0/IBootControl.h>
+#include <fstab/fstab.h>
 #include <liblp/liblp.h>
 
 // Logical partitions are only mapped to a block device as needed, and
@@ -51,6 +52,18 @@
     std::function<void()> closer_;
 };
 
+class AutoMountMetadata {
+  public:
+    AutoMountMetadata();
+    ~AutoMountMetadata();
+    explicit operator bool() const { return mounted_; }
+
+  private:
+    android::fs_mgr::Fstab fstab_;
+    bool mounted_ = false;
+    bool should_unmount_ = false;
+};
+
 class FastbootDevice;
 
 // On normal devices, the super partition is always named "super". On retrofit
diff --git a/fastboot/device/variables.cpp b/fastboot/device/variables.cpp
index 130a3cf..e7d8bc3 100644
--- a/fastboot/device/variables.cpp
+++ b/fastboot/device/variables.cpp
@@ -23,6 +23,7 @@
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
+#include <android/hardware/boot/1.1/IBootControl.h>
 #include <ext4_utils/ext4_utils.h>
 #include <fs_mgr.h>
 #include <healthhalutils/HealthHalUtils.h>
@@ -34,9 +35,11 @@
 
 using ::android::hardware::boot::V1_0::BoolResult;
 using ::android::hardware::boot::V1_0::Slot;
+using ::android::hardware::boot::V1_1::MergeStatus;
 using ::android::hardware::fastboot::V1_0::FileSystemType;
 using ::android::hardware::fastboot::V1_0::Result;
 using ::android::hardware::fastboot::V1_0::Status;
+using IBootControl1_1 = ::android::hardware::boot::V1_1::IBootControl;
 using namespace android::fs_mgr;
 
 constexpr char kFastbootProtocolVersion[] = "0.4";
@@ -59,6 +62,18 @@
     return true;
 }
 
+bool GetOsVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                  std::string* message) {
+    *message = android::base::GetProperty("ro.build.version.release", "");
+    return true;
+}
+
+bool GetVndkVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                    std::string* message) {
+    *message = android::base::GetProperty("ro.vndk.version", "");
+    return true;
+}
+
 bool GetProduct(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                 std::string* message) {
     *message = android::base::GetProperty("ro.product.device", "");
@@ -424,3 +439,73 @@
     *message = fs_mgr_get_super_partition_name(slot_number);
     return true;
 }
+
+bool GetSnapshotUpdateStatus(FastbootDevice* device, const std::vector<std::string>& /* args */,
+                             std::string* message) {
+    // Note that we use the HAL rather than mounting /metadata, since we want
+    // our results to match the bootloader.
+    auto hal = device->boot1_1();
+    if (!hal) {
+        *message = "not supported";
+        return false;
+    }
+
+    MergeStatus status = hal->getSnapshotMergeStatus();
+    switch (status) {
+        case MergeStatus::SNAPSHOTTED:
+            *message = "snapshotted";
+            break;
+        case MergeStatus::MERGING:
+            *message = "merging";
+            break;
+        default:
+            *message = "none";
+            break;
+    }
+    return true;
+}
+
+bool GetCpuAbi(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+               std::string* message) {
+    *message = android::base::GetProperty("ro.product.cpu.abi", "");
+    return true;
+}
+
+bool GetSystemFingerprint(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                          std::string* message) {
+    *message = android::base::GetProperty("ro.system.build.fingerprint", "");
+    if (message->empty()) {
+        *message = android::base::GetProperty("ro.build.fingerprint", "");
+    }
+    return true;
+}
+
+bool GetVendorFingerprint(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                          std::string* message) {
+    *message = android::base::GetProperty("ro.vendor.build.fingerprint", "");
+    return true;
+}
+
+bool GetDynamicPartition(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                         std::string* message) {
+    *message = android::base::GetProperty("ro.boot.dynamic_partitions", "");
+    return true;
+}
+
+bool GetFirstApiLevel(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                      std::string* message) {
+    *message = android::base::GetProperty("ro.product.first_api_level", "");
+    return true;
+}
+
+bool GetSecurityPatchLevel(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                           std::string* message) {
+    *message = android::base::GetProperty("ro.build.version.security_patch", "");
+    return true;
+}
+
+bool GetTrebleEnabled(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
+                      std::string* message) {
+    *message = android::base::GetProperty("ro.treble.enabled", "");
+    return true;
+}
diff --git a/fastboot/device/variables.h b/fastboot/device/variables.h
index 015a4c5..c11e472 100644
--- a/fastboot/device/variables.h
+++ b/fastboot/device/variables.h
@@ -26,6 +26,10 @@
                           std::string* message);
 bool GetBasebandVersion(FastbootDevice* device, const std::vector<std::string>& args,
                         std::string* message);
+bool GetOsVersion(FastbootDevice* device, const std::vector<std::string>& args,
+                  std::string* message);
+bool GetVndkVersion(FastbootDevice* device, const std::vector<std::string>& args,
+                    std::string* message);
 bool GetProduct(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
 bool GetSerial(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
 bool GetSecure(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
@@ -61,6 +65,21 @@
                      std::string* message);
 bool GetSuperPartitionName(FastbootDevice* device, const std::vector<std::string>& args,
                            std::string* message);
+bool GetSnapshotUpdateStatus(FastbootDevice* device, const std::vector<std::string>& args,
+                             std::string* message);
+bool GetCpuAbi(FastbootDevice* device, const std::vector<std::string>& args, std::string* message);
+bool GetSystemFingerprint(FastbootDevice* device, const std::vector<std::string>& args,
+                          std::string* message);
+bool GetVendorFingerprint(FastbootDevice* device, const std::vector<std::string>& args,
+                          std::string* message);
+bool GetDynamicPartition(FastbootDevice* device, const std::vector<std::string>& args,
+                         std::string* message);
+bool GetFirstApiLevel(FastbootDevice* device, const std::vector<std::string>& args,
+                      std::string* message);
+bool GetSecurityPatchLevel(FastbootDevice* device, const std::vector<std::string>& args,
+                           std::string* message);
+bool GetTrebleEnabled(FastbootDevice* device, const std::vector<std::string>& args,
+                      std::string* message);
 
 // Helpers for getvar all.
 std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device);
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 2fe3b1a..7fdc28b 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -396,6 +396,12 @@
             " gsi wipe|disable           Wipe or disable a GSI installation (fastbootd only).\n"
             " wipe-super [SUPER_EMPTY]   Wipe the super partition. This will reset it to\n"
             "                            contain an empty set of default dynamic partitions.\n"
+            " snapshot-update cancel     On devices that support snapshot-based updates, cancel\n"
+            "                            an in-progress update. This may make the device\n"
+            "                            unbootable until it is reflashed.\n"
+            " snapshot-update merge      On devices that support snapshot-based updates, finish\n"
+            "                            an in-progress update if it is in the \"merging\"\n"
+            "                            phase.\n"
             "\n"
             "boot image:\n"
             " boot KERNEL [RAMDISK [SECOND]]\n"
@@ -1216,6 +1222,14 @@
     target_sparse_limit = -1;
 }
 
+static void CancelSnapshotIfNeeded() {
+    std::string merge_status = "none";
+    if (fb->GetVar(FB_VAR_SNAPSHOT_UPDATE_STATUS, &merge_status) == fastboot::SUCCESS &&
+        merge_status != "none") {
+        fb->SnapshotUpdateCommand("cancel");
+    }
+}
+
 class ImageSource {
   public:
     virtual bool ReadFile(const std::string& name, std::vector<char>* out) const = 0;
@@ -1268,6 +1282,8 @@
     DetermineSecondarySlot();
     CollectImages();
 
+    CancelSnapshotIfNeeded();
+
     // First flash boot partitions. We allow this to happen either in userspace
     // or in bootloader fastboot.
     FlashImages(boot_images_);
@@ -2071,12 +2087,24 @@
                 image = next_arg(&args);
             }
             do_wipe_super(image, slot_override);
+        } else if (command == "snapshot-update") {
+            std::string arg;
+            if (!args.empty()) {
+                arg = next_arg(&args);
+            }
+            if (!arg.empty() && (arg != "cancel" && arg != "merge")) {
+                syntax_error("expected: snapshot-update [cancel|merge]");
+            }
+            fb->SnapshotUpdateCommand(arg);
         } else {
             syntax_error("unknown command %s", command.c_str());
         }
     }
 
     if (wants_wipe) {
+        if (force_flash) {
+            CancelSnapshotIfNeeded();
+        }
         std::vector<std::string> partitions = { "userdata", "cache", "metadata" };
         for (const auto& partition : partitions) {
             std::string partition_type;
diff --git a/fastboot/fastboot_driver.cpp b/fastboot/fastboot_driver.cpp
index b897182..8d534ea 100644
--- a/fastboot/fastboot_driver.cpp
+++ b/fastboot/fastboot_driver.cpp
@@ -122,6 +122,15 @@
                       response, info);
 }
 
+RetCode FastBootDriver::SnapshotUpdateCommand(const std::string& command, std::string* response,
+                                              std::vector<std::string>* info) {
+    prolog_(StringPrintf("Snapshot %s", command.c_str()));
+    std::string raw = FB_CMD_SNAPSHOT_UPDATE ":" + command;
+    auto result = RawCommand(raw, response, info);
+    epilog_(result);
+    return result;
+}
+
 RetCode FastBootDriver::FlashPartition(const std::string& partition,
                                        const std::vector<char>& data) {
     RetCode ret;
diff --git a/fastboot/fastboot_driver.h b/fastboot/fastboot_driver.h
index af02637..7265632 100644
--- a/fastboot/fastboot_driver.h
+++ b/fastboot/fastboot_driver.h
@@ -104,6 +104,8 @@
                       std::vector<std::string>* info = nullptr);
     RetCode Upload(const std::string& outfile, std::string* response = nullptr,
                    std::vector<std::string>* info = nullptr);
+    RetCode SnapshotUpdateCommand(const std::string& command, std::string* response = nullptr,
+                                  std::vector<std::string>* info = nullptr);
 
     /* HIGHER LEVEL COMMANDS -- Composed of the commands above */
     RetCode FlashPartition(const std::string& partition, const std::vector<char>& data);
diff --git a/fastboot/fuzzy_fastboot/Android.bp b/fastboot/fuzzy_fastboot/Android.bp
index 277cc3a..bb54fd9 100644
--- a/fastboot/fuzzy_fastboot/Android.bp
+++ b/fastboot/fuzzy_fastboot/Android.bp
@@ -5,7 +5,7 @@
   srcs: [
     "main.cpp",
     "extensions.cpp",
-    "usb_transport_sniffer.cpp",
+    "transport_sniffer.cpp",
     "fixtures.cpp",
     "test_utils.cpp",
   ],
@@ -31,6 +31,8 @@
     "libext4_utils",
   ],
 
+  stl: "libc++_static",
+
   // Static libs (libfastboot2) shared library dependencies are not transitively included
   // This is needed to avoid link time errors when building for mac
   target: {
@@ -40,5 +42,13 @@
           "-framework IOKit",
       ],
     },
-  }
+  },
+
+  // Disable auto-generation of test config as this binary itself is not a test in the test suites,
+  // rather it is used by other tests.
+  auto_gen_config: false,
+  test_suites: [
+    "general-tests",
+    "vts-core",
+  ],
 }
diff --git a/fastboot/fuzzy_fastboot/fixtures.cpp b/fastboot/fuzzy_fastboot/fixtures.cpp
index bc13a8c..bd76ff4 100644
--- a/fastboot/fuzzy_fastboot/fixtures.cpp
+++ b/fastboot/fuzzy_fastboot/fixtures.cpp
@@ -48,12 +48,13 @@
 #include <gtest/gtest.h>
 
 #include "fastboot_driver.h"
+#include "tcp.h"
 #include "usb.h"
 
 #include "extensions.h"
 #include "fixtures.h"
 #include "test_utils.h"
-#include "usb_transport_sniffer.h"
+#include "transport_sniffer.h"
 
 using namespace std::literals::chrono_literals;
 
@@ -74,7 +75,14 @@
     return 0;
 }
 
+bool FastBootTest::IsFastbootOverTcp() {
+    // serial contains ":" is treated as host ip and port number
+    return (device_serial.find(":") != std::string::npos);
+}
+
 bool FastBootTest::UsbStillAvailible() {
+    if (IsFastbootOverTcp()) return true;
+
     // For some reason someone decided to prefix the path with "usb:"
     std::string prefix("usb:");
     if (std::equal(prefix.begin(), prefix.end(), device_path.begin())) {
@@ -113,15 +121,19 @@
         ASSERT_TRUE(UsbStillAvailible());  // The device disconnected
     }
 
-    const auto matcher = [](usb_ifc_info* info) -> int {
-        return MatchFastboot(info, device_serial);
-    };
-    for (int i = 0; i < MAX_USB_TRIES && !transport; i++) {
-        std::unique_ptr<UsbTransport> usb(usb_open(matcher, USB_TIMEOUT));
-        if (usb)
-            transport = std::unique_ptr<UsbTransportSniffer>(
-                    new UsbTransportSniffer(std::move(usb), serial_port));
-        std::this_thread::sleep_for(std::chrono::milliseconds(10));
+    if (IsFastbootOverTcp()) {
+        ConnectTcpFastbootDevice();
+    } else {
+        const auto matcher = [](usb_ifc_info* info) -> int {
+            return MatchFastboot(info, device_serial);
+        };
+        for (int i = 0; i < MAX_USB_TRIES && !transport; i++) {
+            std::unique_ptr<UsbTransport> usb(usb_open(matcher, USB_TIMEOUT));
+            if (usb)
+                transport = std::unique_ptr<TransportSniffer>(
+                        new TransportSniffer(std::move(usb), serial_port));
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        }
     }
 
     ASSERT_TRUE(transport);  // no nullptr
@@ -154,6 +166,8 @@
 
 // TODO, this should eventually be piped to a file instead of stdout
 void FastBootTest::TearDownSerial() {
+    if (IsFastbootOverTcp()) return;
+
     if (!transport) return;
     // One last read from serial
     transport->ProcessSerial();
@@ -167,9 +181,34 @@
     }
 }
 
+void FastBootTest::ConnectTcpFastbootDevice() {
+    std::size_t found = device_serial.find(":");
+    if (found != std::string::npos) {
+        for (int i = 0; i < MAX_TCP_TRIES && !transport; i++) {
+            std::string error;
+            std::unique_ptr<Transport> tcp(
+                    tcp::Connect(device_serial.substr(0, found), tcp::kDefaultPort, &error)
+                            .release());
+            if (tcp)
+                transport =
+                        std::unique_ptr<TransportSniffer>(new TransportSniffer(std::move(tcp), 0));
+            if (transport != nullptr) break;
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        }
+    }
+}
+
 void FastBootTest::ReconnectFastbootDevice() {
     fb.reset();
     transport.reset();
+
+    if (IsFastbootOverTcp()) {
+        ConnectTcpFastbootDevice();
+        device_path = cb_scratch;
+        fb = std::unique_ptr<FastBootDriver>(new FastBootDriver(transport.get(), {}, true));
+        return;
+    }
+
     while (UsbStillAvailible())
         ;
     printf("WAITING FOR DEVICE\n");
@@ -180,8 +219,8 @@
     while (!transport) {
         std::unique_ptr<UsbTransport> usb(usb_open(matcher, USB_TIMEOUT));
         if (usb) {
-            transport = std::unique_ptr<UsbTransportSniffer>(
-                    new UsbTransportSniffer(std::move(usb), serial_port));
+            transport = std::unique_ptr<TransportSniffer>(
+                    new TransportSniffer(std::move(usb), serial_port));
         }
         std::this_thread::sleep_for(1s);
     }
diff --git a/fastboot/fuzzy_fastboot/fixtures.h b/fastboot/fuzzy_fastboot/fixtures.h
index c71c897..2468868 100644
--- a/fastboot/fuzzy_fastboot/fixtures.h
+++ b/fastboot/fuzzy_fastboot/fixtures.h
@@ -31,7 +31,7 @@
 #include "fastboot_driver.h"
 
 #include "extensions.h"
-#include "usb_transport_sniffer.h"
+#include "transport_sniffer.h"
 
 namespace fastboot {
 
@@ -45,11 +45,14 @@
     static int serial_port;
     static std::string device_serial;
     static constexpr int MAX_USB_TRIES = 10;
+    static constexpr int MAX_TCP_TRIES = 6000;
 
     static int MatchFastboot(usb_ifc_info* info, const std::string& local_serial = "");
+    static bool IsFastbootOverTcp();
     bool UsbStillAvailible();
     bool UserSpaceFastboot();
     void ReconnectFastbootDevice();
+    void ConnectTcpFastbootDevice();
 
   protected:
     RetCode DownloadCommand(uint32_t size, std::string* response = nullptr,
@@ -64,7 +67,7 @@
     void TearDownSerial();
     void SetLockState(bool unlock, bool assert_change = true);
 
-    std::unique_ptr<UsbTransportSniffer> transport;
+    std::unique_ptr<TransportSniffer> transport;
     std::unique_ptr<FastBootDriver> fb;
 
   private:
diff --git a/fastboot/fuzzy_fastboot/main.cpp b/fastboot/fuzzy_fastboot/main.cpp
index a1d69d2..d9167e7 100644
--- a/fastboot/fuzzy_fastboot/main.cpp
+++ b/fastboot/fuzzy_fastboot/main.cpp
@@ -54,7 +54,7 @@
 #include "extensions.h"
 #include "fixtures.h"
 #include "test_utils.h"
-#include "usb_transport_sniffer.h"
+#include "transport_sniffer.h"
 
 namespace fastboot {
 
@@ -227,13 +227,6 @@
 
 TEST_F(LogicalPartitionCompliance, FastbootRebootTest) {
     ASSERT_TRUE(UserSpaceFastboot());
-    GTEST_LOG_(INFO) << "Rebooting to bootloader mode";
-    // Test 'fastboot reboot bootloader' from fastbootd
-    fb->RebootTo("bootloader");
-
-    // Test fastboot reboot fastboot from bootloader
-    ReconnectFastbootDevice();
-    ASSERT_FALSE(UserSpaceFastboot());
     GTEST_LOG_(INFO) << "Rebooting back to fastbootd mode";
     fb->RebootTo("fastboot");
 
@@ -268,23 +261,6 @@
     GTEST_LOG_(INFO) << "Flashing a logical partition..";
     EXPECT_EQ(fb->FlashPartition(test_partition_name, buf), SUCCESS)
             << "flash logical -partition failed";
-    GTEST_LOG_(INFO) << "Rebooting to bootloader mode";
-    // Reboot to bootloader mode and attempt to flash the logical partitions
-    fb->RebootTo("bootloader");
-
-    ReconnectFastbootDevice();
-    ASSERT_FALSE(UserSpaceFastboot());
-    GTEST_LOG_(INFO) << "Attempt to flash a logical partition..";
-    EXPECT_EQ(fb->FlashPartition(test_partition_name, buf), DEVICE_FAIL)
-            << "flash logical partition must fail in bootloader";
-    GTEST_LOG_(INFO) << "Rebooting back to fastbootd mode";
-    fb->RebootTo("fastboot");
-
-    ReconnectFastbootDevice();
-    ASSERT_TRUE(UserSpaceFastboot());
-    GTEST_LOG_(INFO) << "Testing 'fastboot delete-logical-partition' command";
-    EXPECT_EQ(fb->DeletePartition(test_partition_name), SUCCESS)
-            << "delete logical-partition failed";
 }
 
 // Conformance tests
@@ -1756,16 +1732,19 @@
     }
 
     setbuf(stdout, NULL);  // no buffering
-    printf("<Waiting for Device>\n");
-    const auto matcher = [](usb_ifc_info* info) -> int {
-        return fastboot::FastBootTest::MatchFastboot(info, fastboot::FastBootTest::device_serial);
-    };
-    Transport* transport = nullptr;
-    while (!transport) {
-        transport = usb_open(matcher);
-        std::this_thread::sleep_for(std::chrono::milliseconds(10));
+
+    if (!fastboot::FastBootTest::IsFastbootOverTcp()) {
+        printf("<Waiting for Device>\n");
+        const auto matcher = [](usb_ifc_info* info) -> int {
+            return fastboot::FastBootTest::MatchFastboot(info, fastboot::FastBootTest::device_serial);
+        };
+        Transport* transport = nullptr;
+        while (!transport) {
+            transport = usb_open(matcher);
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        }
+        transport->Close();
     }
-    transport->Close();
 
     if (args.find("serial_port") != args.end()) {
         fastboot::FastBootTest::serial_port = fastboot::ConfigureSerial(args.at("serial_port"));
diff --git a/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp b/fastboot/fuzzy_fastboot/transport_sniffer.cpp
similarity index 91%
rename from fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp
rename to fastboot/fuzzy_fastboot/transport_sniffer.cpp
index 7c595f4..b55ffd3 100644
--- a/fastboot/fuzzy_fastboot/usb_transport_sniffer.cpp
+++ b/fastboot/fuzzy_fastboot/transport_sniffer.cpp
@@ -1,4 +1,4 @@
-#include "usb_transport_sniffer.h"
+#include "transport_sniffer.h"
 #include <android-base/stringprintf.h>
 #include <sys/select.h>
 #include <sys/time.h>
@@ -8,15 +8,15 @@
 
 namespace fastboot {
 
-UsbTransportSniffer::UsbTransportSniffer(std::unique_ptr<UsbTransport> transport,
+TransportSniffer::TransportSniffer(std::unique_ptr<Transport> transport,
                                          const int serial_fd)
     : transport_(std::move(transport)), serial_fd_(serial_fd) {}
 
-UsbTransportSniffer::~UsbTransportSniffer() {
+TransportSniffer::~TransportSniffer() {
     Close();
 }
 
-ssize_t UsbTransportSniffer::Read(void* data, size_t len) {
+ssize_t TransportSniffer::Read(void* data, size_t len) {
     ProcessSerial();
 
     ssize_t ret = transport_->Read(data, len);
@@ -37,7 +37,7 @@
     return ret;
 }
 
-ssize_t UsbTransportSniffer::Write(const void* data, size_t len) {
+ssize_t TransportSniffer::Write(const void* data, size_t len) {
     ProcessSerial();
 
     size_t ret = transport_->Write(data, len);
@@ -58,11 +58,11 @@
     return ret;
 }
 
-int UsbTransportSniffer::Close() {
+int TransportSniffer::Close() {
     return transport_->Close();
 }
 
-int UsbTransportSniffer::Reset() {
+int TransportSniffer::Reset() {
     ProcessSerial();
     int ret = transport_->Reset();
     std::vector<char> buf;
@@ -72,7 +72,7 @@
     return ret;
 }
 
-const std::vector<UsbTransportSniffer::Event> UsbTransportSniffer::Transfers() {
+const std::vector<TransportSniffer::Event> TransportSniffer::Transfers() {
     return transfers_;
 }
 
@@ -81,7 +81,7 @@
  * the failure. This method will look through its log of captured events, and
  * create a clean printable string of everything that happened.
  */
-std::string UsbTransportSniffer::CreateTrace() {
+std::string TransportSniffer::CreateTrace() {
     std::string ret;
 
     const auto no_print = [](char c) -> bool { return !isprint(c); };
@@ -158,7 +158,7 @@
 
 // This is a quick call to flush any UART logs the device might have sent
 // to our internal event log. It will wait up to 10ms for data to appear
-void UsbTransportSniffer::ProcessSerial() {
+void TransportSniffer::ProcessSerial() {
     if (serial_fd_ <= 0) return;
 
     fd_set set;
diff --git a/fastboot/fuzzy_fastboot/usb_transport_sniffer.h b/fastboot/fuzzy_fastboot/transport_sniffer.h
similarity index 90%
rename from fastboot/fuzzy_fastboot/usb_transport_sniffer.h
rename to fastboot/fuzzy_fastboot/transport_sniffer.h
index 8119aea..2cbb9fe 100644
--- a/fastboot/fuzzy_fastboot/usb_transport_sniffer.h
+++ b/fastboot/fuzzy_fastboot/transport_sniffer.h
@@ -42,12 +42,12 @@
 /* A special class for sniffing reads and writes
  *
  * A useful debugging tool is to see the raw fastboot transactions going between
- * the host and device. This class wraps the UsbTransport class, and snoops and saves
+ * the host and device. This class is a special subclass of Transport that snoops and saves
  * all the transactions going on. Additionally, if there is a console serial port
  * from the device, this class can monitor it as well and capture the interleaving of
  * transport transactions and UART log messages.
  */
-class UsbTransportSniffer : public UsbTransport {
+class TransportSniffer : public Transport {
   public:
     enum EventType {
         READ,
@@ -67,8 +67,8 @@
         const std::vector<char> buf;
     };
 
-    UsbTransportSniffer(std::unique_ptr<UsbTransport> transport, const int serial_fd = 0);
-    ~UsbTransportSniffer() override;
+    TransportSniffer(std::unique_ptr<Transport> transport, const int serial_fd = 0);
+    ~TransportSniffer() override;
 
     virtual ssize_t Read(void* data, size_t len) override;
     virtual ssize_t Write(const void* data, size_t len) override;
@@ -81,7 +81,7 @@
 
   private:
     std::vector<Event> transfers_;
-    std::unique_ptr<UsbTransport> transport_;
+    std::unique_ptr<Transport> transport_;
     const int serial_fd_;
 };
 
diff --git a/fastboot/tcp.cpp b/fastboot/tcp.cpp
index dd6fbf8..dca306f 100644
--- a/fastboot/tcp.cpp
+++ b/fastboot/tcp.cpp
@@ -64,6 +64,7 @@
     ssize_t Read(void* data, size_t length) override;
     ssize_t Write(const void* data, size_t length) override;
     int Close() override;
+    int Reset() override;
 
   private:
     explicit TcpTransport(std::unique_ptr<Socket> sock) : socket_(std::move(sock)) {}
@@ -178,6 +179,10 @@
     return result;
 }
 
+int TcpTransport::Reset() {
+    return 0;
+}
+
 std::unique_ptr<Transport> Connect(const std::string& hostname, int port, std::string* error) {
     return internal::Connect(Socket::NewClient(Socket::Protocol::kTcp, hostname, port, error),
                              error);
diff --git a/fastboot/transport.h b/fastboot/transport.h
index 96b90d2..de0cc92 100644
--- a/fastboot/transport.h
+++ b/fastboot/transport.h
@@ -36,6 +36,8 @@
     // Closes the underlying transport. Returns 0 on success.
     virtual int Close() = 0;
 
+    virtual int Reset() = 0;
+
     // Blocks until the transport disconnects. Transports that don't support
     // this will return immediately. Returns 0 on success.
     virtual int WaitForDisconnect() { return 0; }
diff --git a/fastboot/udp.cpp b/fastboot/udp.cpp
index 53fb347..308c96c 100644
--- a/fastboot/udp.cpp
+++ b/fastboot/udp.cpp
@@ -109,6 +109,7 @@
     ssize_t Read(void* data, size_t length) override;
     ssize_t Write(const void* data, size_t length) override;
     int Close() override;
+    int Reset() override;
 
   private:
     explicit UdpTransport(std::unique_ptr<Socket> socket) : socket_(std::move(socket)) {}
@@ -370,6 +371,10 @@
     return result;
 }
 
+int UdpTransport::Reset() {
+    return 0;
+}
+
 std::unique_ptr<Transport> Connect(const std::string& hostname, int port, std::string* error) {
     return internal::Connect(Socket::NewClient(Socket::Protocol::kUdp, hostname, port, error),
                              error);
diff --git a/fs_mgr/Android.bp b/fs_mgr/Android.bp
index 65f0eff..f5daf91 100644
--- a/fs_mgr/Android.bp
+++ b/fs_mgr/Android.bp
@@ -26,14 +26,14 @@
     ],
 }
 
-cc_library {
-    // Do not ever allow this library to be vendor_available as a shared library.
-    // It does not have a stable interface.
-    name: "libfs_mgr",
+cc_defaults {
+    name: "libfs_mgr_defaults",
     defaults: ["fs_mgr_defaults"],
-    recovery_available: true,
     export_include_dirs: ["include"],
     include_dirs: ["system/vold"],
+    cflags: [
+        "-D_FILE_OFFSET_BITS=64",
+    ],
     srcs: [
         "file_wait.cpp",
         "fs_mgr.cpp",
@@ -43,6 +43,7 @@
         "fs_mgr_overlayfs.cpp",
         "fs_mgr_roots.cpp",
         "fs_mgr_vendor_overlay.cpp",
+        ":libfiemap_srcs",
     ],
     shared_libs: [
         "libbase",
@@ -74,6 +75,7 @@
         "liblogwrap",
         "libdm",
         "libext2_uuid",
+        "libfscrypt",
         "libfstab",
     ],
     cppflags: [
@@ -87,6 +89,47 @@
             ],
         },
     },
+    header_libs: [
+        "libfiemap_headers",
+        "libstorage_literals_headers",
+    ],
+    export_header_lib_headers: [
+        "libfiemap_headers",
+    ],
+    required: [
+        "e2freefrag",
+        "e2fsdroid",
+    ],
+}
+
+// Two variants of libfs_mgr are provided: libfs_mgr and libfs_mgr_binder.
+// Use libfs_mgr in recovery, first-stage-init, or when libfiemap or overlayfs
+// is not used.
+//
+// Use libfs_mgr_binder when not in recovery/first-stage init, or when overlayfs
+// or libfiemap is needed. In this case, libfiemap will proxy over binder to
+// gsid.
+cc_library {
+    // Do not ever allow this library to be vendor_available as a shared library.
+    // It does not have a stable interface.
+    name: "libfs_mgr",
+    recovery_available: true,
+    defaults: [
+        "libfs_mgr_defaults",
+    ],
+    srcs: [
+        ":libfiemap_passthrough_srcs",
+    ],
+}
+
+cc_library {
+    // Do not ever allow this library to be vendor_available as a shared library.
+    // It does not have a stable interface.
+    name: "libfs_mgr_binder",
+    defaults: [
+        "libfs_mgr_defaults",
+        "libfiemap_binder_defaults",
+    ],
 }
 
 cc_library_static {
@@ -127,7 +170,7 @@
         "libcrypto",
         "libext4_utils",
         "libfec",
-        "libfs_mgr",
+        "libfs_mgr_binder",
         "liblog",
         "liblp",
         "libselinux",
@@ -149,4 +192,26 @@
             ],
         },
     },
+    required: [
+        "clean_scratch_files",
+    ],
+}
+
+cc_binary {
+    name: "clean_scratch_files",
+    defaults: ["fs_mgr_defaults"],
+    shared_libs: [
+        "libbase",
+        "libfs_mgr_binder",
+    ],
+    srcs: [
+        "clean_scratch_files.cpp",
+    ],
+    product_variables: {
+        debuggable: {
+            init_rc: [
+                "clean_scratch_files.rc",
+            ],
+        },
+    },
 }
diff --git a/fs_mgr/README.overlayfs.md b/fs_mgr/README.overlayfs.md
index bb63df8..f579078 100644
--- a/fs_mgr/README.overlayfs.md
+++ b/fs_mgr/README.overlayfs.md
@@ -32,9 +32,9 @@
 
 Then enter one of the following sequences:
 
-    $ adb stop
+    $ adb shell stop
     $ adb sync
-    $ adb start
+    $ adb shell start
     $ adb reboot
 
 *or*
diff --git a/fs_mgr/TEST_MAPPING b/fs_mgr/TEST_MAPPING
new file mode 100644
index 0000000..705d4e3
--- /dev/null
+++ b/fs_mgr/TEST_MAPPING
@@ -0,0 +1,19 @@
+{
+  "presubmit": [
+    {
+      "name": "libdm_test"
+    },
+    {
+      "name": "liblp_test"
+    },
+    {
+      "name": "fiemap_image_test_presubmit"
+    },
+    {
+      "name": "fiemap_writer_test"
+    },
+    {
+      "name": "vts_libsnapshot_test_presubmit"
+    }
+  ]
+}
diff --git a/libmemunreachable/tests/HostMallocStub.cpp b/fs_mgr/clean_scratch_files.cpp
similarity index 77%
copy from libmemunreachable/tests/HostMallocStub.cpp
copy to fs_mgr/clean_scratch_files.cpp
index 0ef0487..42fe35a 100644
--- a/libmemunreachable/tests/HostMallocStub.cpp
+++ b/fs_mgr/clean_scratch_files.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,8 +14,9 @@
  * limitations under the License.
  */
 
-#include "bionic.h"
+#include <fs_mgr_overlayfs.h>
 
-void malloc_disable() {}
-
-void malloc_enable() {}
+int main() {
+    android::fs_mgr::CleanupOldScratchFiles();
+    return 0;
+}
diff --git a/fs_mgr/clean_scratch_files.rc b/fs_mgr/clean_scratch_files.rc
new file mode 100644
index 0000000..738d1aa
--- /dev/null
+++ b/fs_mgr/clean_scratch_files.rc
@@ -0,0 +1,2 @@
+on post-fs-data && property:ro.debuggable=1
+    exec_background - root root -- clean_scratch_files
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 4ba1c49..b27126b 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -34,6 +34,7 @@
 #include <time.h>
 #include <unistd.h>
 
+#include <chrono>
 #include <functional>
 #include <map>
 #include <memory>
@@ -42,6 +43,7 @@
 #include <utility>
 #include <vector>
 
+#include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
@@ -58,6 +60,7 @@
 #include <fs_avb/fs_avb.h>
 #include <fs_mgr/file_wait.h>
 #include <fs_mgr_overlayfs.h>
+#include <fscrypt/fscrypt.h>
 #include <libdm/dm.h>
 #include <liblp/metadata_format.h>
 #include <linux/fs.h>
@@ -83,15 +86,22 @@
 #define ZRAM_BACK_DEV   "/sys/block/zram0/backing_dev"
 
 #define SYSFS_EXT4_VERITY "/sys/fs/ext4/features/verity"
+#define SYSFS_EXT4_CASEFOLD "/sys/fs/ext4/features/casefold"
+
+// FIXME: this should be in system/extras
+#define EXT4_FEATURE_COMPAT_STABLE_INODES 0x0800
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
 
 using android::base::Basename;
+using android::base::GetBoolProperty;
 using android::base::Realpath;
 using android::base::StartsWith;
+using android::base::Timer;
 using android::base::unique_fd;
 using android::dm::DeviceMapper;
 using android::dm::DmDeviceState;
+using android::dm::DmTargetLinear;
 
 // Realistically, this file should be part of the android::fs_mgr namespace;
 using namespace android::fs_mgr;
@@ -115,6 +125,7 @@
     FS_STAT_SET_RESERVED_BLOCKS_FAILED = 0x20000,
     FS_STAT_ENABLE_ENCRYPTION_FAILED = 0x40000,
     FS_STAT_ENABLE_VERITY_FAILED = 0x80000,
+    FS_STAT_ENABLE_CASEFOLD_FAILED = 0x100000,
 };
 
 static void log_fs_stat(const std::string& blk_device, int fs_stat) {
@@ -336,6 +347,7 @@
                        const struct ext4_super_block* sb, int* fs_stat) {
     bool has_quota = (sb->s_feature_ro_compat & cpu_to_le32(EXT4_FEATURE_RO_COMPAT_QUOTA)) != 0;
     bool want_quota = entry.fs_mgr_flags.quota;
+    bool want_projid = android::base::GetBoolProperty("ro.emulated_storage.projid", false);
 
     if (has_quota == want_quota) {
         return;
@@ -352,12 +364,16 @@
     if (want_quota) {
         LINFO << "Enabling quotas on " << blk_device;
         argv[1] = "-Oquota";
-        argv[2] = "-Qusrquota,grpquota";
+        // Once usr/grp unneeded, make just prjquota to save overhead
+        if (want_projid)
+            argv[2] = "-Qusrquota,grpquota,prjquota";
+        else
+            argv[2] = "-Qusrquota,grpquota";
         *fs_stat |= FS_STAT_QUOTA_ENABLED;
     } else {
         LINFO << "Disabling quotas on " << blk_device;
         argv[1] = "-O^quota";
-        argv[2] = "-Q^usrquota,^grpquota";
+        argv[2] = "-Q^usrquota,^grpquota,^prjquota";
     }
 
     if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
@@ -412,25 +428,43 @@
 // Enable file-based encryption if needed.
 static void tune_encrypt(const std::string& blk_device, const FstabEntry& entry,
                          const struct ext4_super_block* sb, int* fs_stat) {
-    bool has_encrypt = (sb->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_ENCRYPT)) != 0;
-    bool want_encrypt = entry.fs_mgr_flags.file_encryption;
-
-    if (has_encrypt || !want_encrypt) {
+    if (!entry.fs_mgr_flags.file_encryption) {
+        return;  // Nothing needs done.
+    }
+    std::vector<std::string> features_needed;
+    if ((sb->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_ENCRYPT)) == 0) {
+        features_needed.emplace_back("encrypt");
+    }
+    android::fscrypt::EncryptionOptions options;
+    if (!android::fscrypt::ParseOptions(entry.encryption_options, &options)) {
+        LERROR << "Unable to parse encryption options on " << blk_device << ": "
+               << entry.encryption_options;
         return;
     }
-
+    if ((options.flags & FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64) != 0) {
+        // We can only use this policy on ext4 if the "stable_inodes" feature
+        // is set on the filesystem, otherwise shrinking will break encrypted files.
+        if ((sb->s_feature_compat & cpu_to_le32(EXT4_FEATURE_COMPAT_STABLE_INODES)) == 0) {
+            features_needed.emplace_back("stable_inodes");
+        }
+    }
+    if (features_needed.size() == 0) {
+        return;
+    }
     if (!tune2fs_available()) {
         LERROR << "Unable to enable ext4 encryption on " << blk_device
                << " because " TUNE2FS_BIN " is missing";
         return;
     }
 
-    const char* argv[] = {TUNE2FS_BIN, "-Oencrypt", blk_device.c_str()};
+    auto flags = android::base::Join(features_needed, ',');
+    auto flag_arg = "-O"s + flags;
+    const char* argv[] = {TUNE2FS_BIN, flag_arg.c_str(), blk_device.c_str()};
 
-    LINFO << "Enabling ext4 encryption on " << blk_device;
+    LINFO << "Enabling ext4 flags " << flags << " on " << blk_device;
     if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
         LERROR << "Failed to run " TUNE2FS_BIN " to enable "
-               << "ext4 encryption on " << blk_device;
+               << "ext4 flags " << flags << " on " << blk_device;
         *fs_stat |= FS_STAT_ENABLE_ENCRYPTION_FAILED;
     }
 }
@@ -472,6 +506,42 @@
     }
 }
 
+// Enable casefold if needed.
+static void tune_casefold(const std::string& blk_device, const struct ext4_super_block* sb,
+                          int* fs_stat) {
+    bool has_casefold =
+            (sb->s_feature_ro_compat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_CASEFOLD)) != 0;
+    bool wants_casefold = android::base::GetBoolProperty("ro.emulated_storage.casefold", false);
+
+    if (!wants_casefold || has_casefold) return;
+
+    std::string casefold_support;
+    if (!android::base::ReadFileToString(SYSFS_EXT4_CASEFOLD, &casefold_support)) {
+        LERROR << "Failed to open " << SYSFS_EXT4_CASEFOLD;
+        return;
+    }
+
+    if (!(android::base::Trim(casefold_support) == "supported")) {
+        LERROR << "Current ext4 casefolding not supported by kernel";
+        return;
+    }
+
+    if (!tune2fs_available()) {
+        LERROR << "Unable to enable ext4 casefold on " << blk_device
+               << " because " TUNE2FS_BIN " is missing";
+        return;
+    }
+
+    LINFO << "Enabling ext4 casefold on " << blk_device;
+
+    const char* argv[] = {TUNE2FS_BIN, "-O", "casefold", "-E", "encoding=utf8", blk_device.c_str()};
+    if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
+        LERROR << "Failed to run " TUNE2FS_BIN " to enable "
+               << "ext4 casefold on " << blk_device;
+        *fs_stat |= FS_STAT_ENABLE_CASEFOLD_FAILED;
+    }
+}
+
 // Read the primary superblock from an f2fs filesystem.  On failure return
 // false.  If it's not an f2fs filesystem, also set FS_STAT_INVALID_MAGIC.
 #define F2FS_BLKSIZE 4096
@@ -569,6 +639,7 @@
             tune_reserved_size(blk_device, entry, &sb, &fs_stat);
             tune_encrypt(blk_device, entry, &sb, &fs_stat);
             tune_verity(blk_device, entry, &sb, &fs_stat);
+            tune_casefold(blk_device, &sb, &fs_stat);
         }
     }
 
@@ -816,7 +887,7 @@
 }
 
 static bool should_use_metadata_encryption(const FstabEntry& entry) {
-    return !entry.key_dir.empty() &&
+    return !entry.metadata_key_dir.empty() &&
            (entry.fs_mgr_flags.file_encryption || entry.fs_mgr_flags.force_fde_or_fbe);
 }
 
@@ -884,12 +955,27 @@
     return true;
 }
 
+static bool SupportsCheckpoint(FstabEntry* entry) {
+    return entry->fs_mgr_flags.checkpoint_blk || entry->fs_mgr_flags.checkpoint_fs;
+}
+
 class CheckpointManager {
   public:
     CheckpointManager(int needs_checkpoint = -1) : needs_checkpoint_(needs_checkpoint) {}
 
+    bool NeedsCheckpoint() {
+        if (needs_checkpoint_ != UNKNOWN) {
+            return needs_checkpoint_ == YES;
+        }
+        if (!call_vdc({"checkpoint", "needsCheckpoint"}, &needs_checkpoint_)) {
+            LERROR << "Failed to find if checkpointing is needed. Assuming no.";
+            needs_checkpoint_ = NO;
+        }
+        return needs_checkpoint_ == YES;
+    }
+
     bool Update(FstabEntry* entry, const std::string& block_device = std::string()) {
-        if (!entry->fs_mgr_flags.checkpoint_blk && !entry->fs_mgr_flags.checkpoint_fs) {
+        if (!SupportsCheckpoint(entry)) {
             return true;
         }
 
@@ -897,13 +983,7 @@
             call_vdc({"checkpoint", "restoreCheckpoint", entry->blk_device}, nullptr);
         }
 
-        if (needs_checkpoint_ == UNKNOWN &&
-            !call_vdc({"checkpoint", "needsCheckpoint"}, &needs_checkpoint_)) {
-            LERROR << "Failed to find if checkpointing is needed. Assuming no.";
-            needs_checkpoint_ = NO;
-        }
-
-        if (needs_checkpoint_ != YES) {
+        if (!NeedsCheckpoint()) {
             return true;
         }
 
@@ -916,7 +996,7 @@
     }
 
     bool Revert(FstabEntry* entry) {
-        if (!entry->fs_mgr_flags.checkpoint_blk && !entry->fs_mgr_flags.checkpoint_fs) {
+        if (!SupportsCheckpoint(entry)) {
             return true;
         }
 
@@ -1035,6 +1115,83 @@
     }
 }
 
+static constexpr const char* kUserdataWrapperName = "userdata-wrapper";
+
+static void WrapUserdata(FstabEntry* entry, dev_t dev, const std::string& block_device) {
+    DeviceMapper& dm = DeviceMapper::Instance();
+    if (dm.GetState(kUserdataWrapperName) != DmDeviceState::INVALID) {
+        // This will report failure for us. If we do fail to get the path,
+        // we leave the device unwrapped.
+        dm.GetDmDevicePathByName(kUserdataWrapperName, &entry->blk_device);
+        return;
+    }
+
+    unique_fd fd(open(block_device.c_str(), O_RDONLY | O_CLOEXEC));
+    if (fd < 0) {
+        PLOG(ERROR) << "open failed: " << entry->blk_device;
+        return;
+    }
+
+    auto dev_str = android::base::StringPrintf("%u:%u", major(dev), minor(dev));
+    uint64_t sectors = get_block_device_size(fd) / 512;
+
+    android::dm::DmTable table;
+    table.Emplace<DmTargetLinear>(0, sectors, dev_str, 0);
+
+    std::string dm_path;
+    if (!dm.CreateDevice(kUserdataWrapperName, table, &dm_path, 20s)) {
+        LOG(ERROR) << "Failed to create userdata wrapper device";
+        return;
+    }
+    entry->blk_device = dm_path;
+}
+
+// When using Virtual A/B, partitions can be backed by /data and mapped with
+// device-mapper in first-stage init. This can happen when merging an OTA or
+// when using adb remount to house "scratch". In this case, /data cannot be
+// mounted directly off the userdata block device, and e2fsck will refuse to
+// scan it, because the kernel reports the block device as in-use.
+//
+// As a workaround, when mounting /data, we create a trivial dm-linear wrapper
+// if the underlying block device already has dependencies. Note that we make
+// an exception for metadata-encrypted devices, since dm-default-key is already
+// a wrapper.
+static void WrapUserdataIfNeeded(FstabEntry* entry, const std::string& actual_block_device = {}) {
+    const auto& block_device =
+            actual_block_device.empty() ? entry->blk_device : actual_block_device;
+    if (entry->mount_point != "/data" || !entry->metadata_key_dir.empty() ||
+        android::base::StartsWith(block_device, "/dev/block/dm-")) {
+        return;
+    }
+
+    struct stat st;
+    if (stat(block_device.c_str(), &st) < 0) {
+        PLOG(ERROR) << "stat failed: " << block_device;
+        return;
+    }
+
+    std::string path = android::base::StringPrintf("/sys/dev/block/%u:%u/holders",
+                                                   major(st.st_rdev), minor(st.st_rdev));
+    std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(path.c_str()), closedir);
+    if (!dir) {
+        PLOG(ERROR) << "opendir failed: " << path;
+        return;
+    }
+
+    struct dirent* d;
+    bool has_holders = false;
+    while ((d = readdir(dir.get())) != nullptr) {
+        if (strcmp(d->d_name, ".") != 0 && strcmp(d->d_name, "..") != 0) {
+            has_holders = true;
+            break;
+        }
+    }
+
+    if (has_holders) {
+        WrapUserdata(entry, st.st_rdev, block_device);
+    }
+}
+
 static bool IsMountPointMounted(const std::string& mount_point) {
     // Check if this is already mounted.
     Fstab fstab;
@@ -1057,7 +1214,9 @@
         return FS_MGR_MNTALL_FAIL;
     }
 
-    for (size_t i = 0; i < fstab->size(); i++) {
+    // Keep i int to prevent unsigned integer overflow from (i = top_idx - 1),
+    // where top_idx is 0. It will give SIGABRT
+    for (int i = 0; i < static_cast<int>(fstab->size()); i++) {
         auto& current_entry = (*fstab)[i];
 
         // If a filesystem should have been mounted in the first stage, we
@@ -1091,6 +1250,12 @@
             continue;
         }
 
+        // Terrible hack to make it possible to remount /data.
+        // TODO: refact fs_mgr_mount_all and get rid of this.
+        if (mount_mode == MOUNT_MODE_ONLY_USERDATA && current_entry.mount_point != "/data") {
+            continue;
+        }
+
         // Translate LABEL= file system labels into block devices.
         if (is_extfs(current_entry.fs_type)) {
             if (!TranslateExtLabels(&current_entry)) {
@@ -1106,6 +1271,8 @@
             }
         }
 
+        WrapUserdataIfNeeded(&current_entry);
+
         if (!checkpoint_manager.Update(&current_entry)) {
             continue;
         }
@@ -1324,6 +1491,126 @@
     return ret;
 }
 
+static bool fs_mgr_unmount_all_data_mounts(const std::string& block_device) {
+    LINFO << __FUNCTION__ << "(): about to umount everything on top of " << block_device;
+    Timer t;
+    // TODO(b/135984674): should be configured via a read-only property.
+    std::chrono::milliseconds timeout = 5s;
+    while (true) {
+        bool umount_done = true;
+        Fstab proc_mounts;
+        if (!ReadFstabFromFile("/proc/mounts", &proc_mounts)) {
+            LERROR << __FUNCTION__ << "(): Can't read /proc/mounts";
+            return false;
+        }
+        // Now proceed with other bind mounts on top of /data.
+        for (const auto& entry : proc_mounts) {
+            if (entry.blk_device == block_device) {
+                if (umount2(entry.mount_point.c_str(), 0) != 0) {
+                    PERROR << __FUNCTION__ << "(): Failed to umount " << entry.mount_point;
+                    umount_done = false;
+                }
+            }
+        }
+        if (umount_done) {
+            LINFO << __FUNCTION__ << "(): Unmounting /data took " << t;
+            return true;
+        }
+        if (t.duration() > timeout) {
+            LERROR << __FUNCTION__ << "(): Timed out unmounting all mounts on " << block_device;
+            Fstab remaining_mounts;
+            if (!ReadFstabFromFile("/proc/mounts", &remaining_mounts)) {
+                LERROR << __FUNCTION__ << "(): Can't read /proc/mounts";
+            } else {
+                LERROR << __FUNCTION__ << "(): Following mounts remaining";
+                for (const auto& e : remaining_mounts) {
+                    LERROR << __FUNCTION__ << "(): mount point: " << e.mount_point
+                           << " block device: " << e.blk_device;
+                }
+            }
+            return false;
+        }
+        std::this_thread::sleep_for(50ms);
+    }
+}
+
+// TODO(b/143970043): return different error codes based on which step failed.
+int fs_mgr_remount_userdata_into_checkpointing(Fstab* fstab) {
+    Fstab proc_mounts;
+    if (!ReadFstabFromFile("/proc/mounts", &proc_mounts)) {
+        LERROR << "Can't read /proc/mounts";
+        return -1;
+    }
+    std::string block_device;
+    if (auto entry = GetEntryForMountPoint(&proc_mounts, "/data"); entry != nullptr) {
+        // Note: we don't care about a userdata wrapper here, since it's safe
+        // to remount on top of the bow device instead, there will be no
+        // conflicts.
+        block_device = entry->blk_device;
+    } else {
+        LERROR << "/data is not mounted";
+        return -1;
+    }
+    auto fstab_entry = GetMountedEntryForUserdata(fstab);
+    if (fstab_entry == nullptr) {
+        LERROR << "Can't find /data in fstab";
+        return -1;
+    }
+    bool force_umount = GetBoolProperty("sys.init.userdata_remount.force_umount", false);
+    if (force_umount) {
+        LINFO << "Will force an umount of userdata even if it's not required";
+    }
+    if (!force_umount && !SupportsCheckpoint(fstab_entry)) {
+        LINFO << "Userdata doesn't support checkpointing. Nothing to do";
+        return 0;
+    }
+    CheckpointManager checkpoint_manager;
+    if (!force_umount && !checkpoint_manager.NeedsCheckpoint()) {
+        LINFO << "Checkpointing not needed. Don't remount";
+        return 0;
+    }
+    if (!force_umount && fstab_entry->fs_mgr_flags.checkpoint_fs) {
+        // Userdata is f2fs, simply remount it.
+        if (!checkpoint_manager.Update(fstab_entry)) {
+            LERROR << "Failed to remount userdata in checkpointing mode";
+            return -1;
+        }
+        if (mount(block_device.c_str(), fstab_entry->mount_point.c_str(), "none",
+                  MS_REMOUNT | fstab_entry->flags, fstab_entry->fs_options.c_str()) != 0) {
+            PERROR << "Failed to remount userdata in checkpointing mode";
+            return -1;
+        }
+    } else {
+        LINFO << "Unmounting /data before remounting into checkpointing mode";
+        if (!fs_mgr_unmount_all_data_mounts(block_device)) {
+            LERROR << "Failed to umount /data";
+            return -1;
+        }
+        DeviceMapper& dm = DeviceMapper::Instance();
+        while (dm.IsDmBlockDevice(block_device)) {
+            auto next_device = dm.GetParentBlockDeviceByPath(block_device);
+            auto name = dm.GetDmDeviceNameByPath(block_device);
+            if (!name) {
+                LERROR << "Failed to get dm-name for " << block_device;
+                return -1;
+            }
+            LINFO << "Deleting " << block_device << " named " << *name;
+            if (!dm.DeleteDevice(*name, 3s)) {
+                return -1;
+            }
+            if (!next_device) {
+                LERROR << "Failed to find parent device for " << block_device;
+            }
+            block_device = *next_device;
+        }
+        LINFO << "Remounting /data";
+        // TODO(b/143970043): remove this hack after fs_mgr_mount_all is refactored.
+        int result = fs_mgr_mount_all(fstab, MOUNT_MODE_ONLY_USERDATA);
+        return result == FS_MGR_MNTALL_FAIL ? -1 : 0;
+    }
+    return 0;
+}
+
 // wrapper to __mount() and expects a fully prepared fstab_rec,
 // unlike fs_mgr_do_mount which does more things with avb / verity etc.
 int fs_mgr_do_mount_one(const FstabEntry& entry, const std::string& mount_point) {
@@ -1377,6 +1664,8 @@
             }
         }
 
+        WrapUserdataIfNeeded(&fstab_entry, n_blk_device);
+
         if (!checkpoint_manager.Update(&fstab_entry, n_blk_device)) {
             LERROR << "Could not set up checkpoint partition, skipping!";
             continue;
diff --git a/fs_mgr/fs_mgr_dm_linear.cpp b/fs_mgr/fs_mgr_dm_linear.cpp
index 0dcb9fe..ea9c957 100644
--- a/fs_mgr/fs_mgr_dm_linear.cpp
+++ b/fs_mgr/fs_mgr_dm_linear.cpp
@@ -151,6 +151,10 @@
             LINFO << "Skipping zero-length logical partition: " << GetPartitionName(partition);
             continue;
         }
+        if (partition.attributes & LP_PARTITION_ATTR_DISABLED) {
+            LINFO << "Skipping disabled partition: " << GetPartitionName(partition);
+            continue;
+        }
 
         params.partition = &partition;
 
diff --git a/fs_mgr/fs_mgr_format.cpp b/fs_mgr/fs_mgr_format.cpp
index acf4d7b..a8c2cc1 100644
--- a/fs_mgr/fs_mgr_format.cpp
+++ b/fs_mgr/fs_mgr_format.cpp
@@ -24,6 +24,7 @@
 #include <cutils/partition_utils.h>
 #include <sys/mount.h>
 
+#include <android-base/properties.h>
 #include <android-base/unique_fd.h>
 #include <ext4_utils/ext4.h>
 #include <ext4_utils/ext4_utils.h>
@@ -57,7 +58,7 @@
 }
 
 static int format_ext4(const std::string& fs_blkdev, const std::string& fs_mnt_point,
-                       bool crypt_footer) {
+                       bool crypt_footer, bool needs_projid) {
     uint64_t dev_sz;
     int rc = 0;
 
@@ -72,11 +73,20 @@
     }
 
     std::string size_str = std::to_string(dev_sz / 4096);
-    const char* const mke2fs_args[] = {
-            "/system/bin/mke2fs", "-t",   "ext4", "-b", "4096", fs_blkdev.c_str(),
-            size_str.c_str(),     nullptr};
 
-    rc = logwrap_fork_execvp(arraysize(mke2fs_args), mke2fs_args, nullptr, false, LOG_KLOG, true,
+    std::vector<const char*> mke2fs_args = {"/system/bin/mke2fs", "-t", "ext4", "-b", "4096"};
+
+    // Project ID's require wider inodes. The Quotas themselves are enabled by tune2fs during boot.
+    if (needs_projid) {
+        mke2fs_args.push_back("-I");
+        mke2fs_args.push_back("512");
+    }
+    // casefolding is enabled via tune2fs during boot.
+
+    mke2fs_args.push_back(fs_blkdev.c_str());
+    mke2fs_args.push_back(size_str.c_str());
+
+    rc = logwrap_fork_execvp(mke2fs_args.size(), mke2fs_args.data(), nullptr, false, LOG_KLOG, true,
                              nullptr);
     if (rc) {
         LERROR << "mke2fs returned " << rc;
@@ -95,7 +105,8 @@
     return rc;
 }
 
-static int format_f2fs(const std::string& fs_blkdev, uint64_t dev_sz, bool crypt_footer) {
+static int format_f2fs(const std::string& fs_blkdev, uint64_t dev_sz, bool crypt_footer,
+                       bool needs_projid, bool needs_casefold) {
     if (!dev_sz) {
         int rc = get_dev_sz(fs_blkdev, &dev_sz);
         if (rc) {
@@ -109,26 +120,40 @@
     }
 
     std::string size_str = std::to_string(dev_sz / 4096);
-    // clang-format off
-    const char* const args[] = {
-        "/system/bin/make_f2fs",
-        "-g", "android",
-        fs_blkdev.c_str(),
-        size_str.c_str(),
-        nullptr
-    };
-    // clang-format on
 
-    return logwrap_fork_execvp(arraysize(args), args, nullptr, false, LOG_KLOG, true, nullptr);
+    std::vector<const char*> args = {"/system/bin/make_f2fs", "-g", "android"};
+    if (needs_projid) {
+        args.push_back("-O");
+        args.push_back("project_quota,extra_attr");
+    }
+    if (needs_casefold) {
+        args.push_back("-O");
+        args.push_back("casefold");
+        args.push_back("-C");
+        args.push_back("utf8");
+    }
+    args.push_back(fs_blkdev.c_str());
+    args.push_back(size_str.c_str());
+
+    return logwrap_fork_execvp(args.size(), args.data(), nullptr, false, LOG_KLOG, true, nullptr);
 }
 
 int fs_mgr_do_format(const FstabEntry& entry, bool crypt_footer) {
     LERROR << __FUNCTION__ << ": Format " << entry.blk_device << " as '" << entry.fs_type << "'";
 
+    bool needs_casefold = false;
+    bool needs_projid = false;
+
+    if (entry.mount_point == "/data") {
+        needs_casefold = android::base::GetBoolProperty("ro.emulated_storage.casefold", false);
+        needs_projid = android::base::GetBoolProperty("ro.emulated_storage.projid", false);
+    }
+
     if (entry.fs_type == "f2fs") {
-        return format_f2fs(entry.blk_device, entry.length, crypt_footer);
+        return format_f2fs(entry.blk_device, entry.length, crypt_footer, needs_projid,
+                           needs_casefold);
     } else if (entry.fs_type == "ext4") {
-        return format_ext4(entry.blk_device, entry.mount_point, crypt_footer);
+        return format_ext4(entry.blk_device, entry.mount_point, crypt_footer, needs_projid);
     } else {
         LERROR << "File system type '" << entry.fs_type << "' is not supported";
         return -EINVAL;
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 2ff5243..561d994 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -40,6 +40,7 @@
 using android::base::ParseByteCount;
 using android::base::ParseInt;
 using android::base::ReadFileToString;
+using android::base::Readlink;
 using android::base::Split;
 using android::base::StartsWith;
 
@@ -99,71 +100,9 @@
     return false;
 }
 
-const std::array<const char*, 3> kFileContentsEncryptionMode = {
-        "aes-256-xts",
-        "adiantum",
-        "ice",
-};
-
-const std::array<const char*, 3> kFileNamesEncryptionMode = {
-        "aes-256-cts",
-        "aes-256-heh",
-        "adiantum",
-};
-
 void ParseFileEncryption(const std::string& arg, FstabEntry* entry) {
-    // The fileencryption flag is followed by an = and 1 to 3 colon-separated fields:
-    //
-    // 1. Contents encryption mode
-    // 2. Filenames encryption mode (defaults to "aes-256-cts" or "adiantum"
-    //    depending on the contents encryption mode)
-    // 3. Encryption policy version (defaults to "v1". Use "v2" on new devices.)
     entry->fs_mgr_flags.file_encryption = true;
-
-    auto parts = Split(arg, ":");
-    if (parts.empty() || parts.size() > 3) {
-        LWARNING << "Warning: fileencryption= flag malformed: " << arg;
-        return;
-    }
-
-    // Alias for backwards compatibility.
-    if (parts[0] == "software") {
-        parts[0] = "aes-256-xts";
-    }
-
-    if (std::find(kFileContentsEncryptionMode.begin(), kFileContentsEncryptionMode.end(),
-                  parts[0]) == kFileContentsEncryptionMode.end()) {
-        LWARNING << "fileencryption= flag malformed, file contents encryption mode not found: "
-                 << arg;
-        return;
-    }
-
-    entry->file_contents_mode = parts[0];
-
-    if (parts.size() >= 2) {
-        if (std::find(kFileNamesEncryptionMode.begin(), kFileNamesEncryptionMode.end(), parts[1]) ==
-            kFileNamesEncryptionMode.end()) {
-            LWARNING << "fileencryption= flag malformed, file names encryption mode not found: "
-                     << arg;
-            return;
-        }
-
-        entry->file_names_mode = parts[1];
-    } else if (entry->file_contents_mode == "adiantum") {
-        entry->file_names_mode = "adiantum";
-    } else {
-        entry->file_names_mode = "aes-256-cts";
-    }
-
-    if (parts.size() >= 3) {
-        if (!android::base::StartsWith(parts[2], 'v') ||
-            !android::base::ParseInt(&parts[2][1], &entry->file_policy_version)) {
-            LWARNING << "fileencryption= flag malformed, unknown options: " << arg;
-            return;
-        }
-    } else {
-        entry->file_policy_version = 1;
-    }
+    entry->encryption_options = arg;
 }
 
 bool SetMountFlag(const std::string& flag, FstabEntry* entry) {
@@ -299,9 +238,7 @@
             // return it.
             entry->fs_mgr_flags.force_fde_or_fbe = true;
             entry->key_loc = arg;
-            entry->file_contents_mode = "aes-256-xts";
-            entry->file_names_mode = "aes-256-cts";
-            entry->file_policy_version = 1;
+            entry->encryption_options = "aes-256-xts:aes-256-cts";
         } else if (StartsWith(flag, "max_comp_streams=")) {
             if (!ParseInt(arg, &entry->max_comp_streams)) {
                 LWARNING << "Warning: max_comp_streams= flag malformed: " << arg;
@@ -339,7 +276,10 @@
             entry->vbmeta_partition = arg;
         } else if (StartsWith(flag, "keydirectory=")) {
             // The metadata flag is followed by an = and the directory for the keys.
-            entry->key_dir = arg;
+            entry->metadata_key_dir = arg;
+        } else if (StartsWith(flag, "metadata_cipher=")) {
+            // Specify the cipher to use for metadata encryption
+            entry->metadata_cipher = arg;
         } else if (StartsWith(flag, "sysfs_path=")) {
             // The path to trigger device gc by idle-maint of vold.
             entry->sysfs_path = arg;
@@ -645,8 +585,7 @@
 }  // namespace
 
 void TransformFstabForDsu(Fstab* fstab, const std::vector<std::string>& dsu_partitions) {
-    static constexpr char kGsiKeys[] =
-            "/avb/q-gsi.avbpubkey:/avb/r-gsi.avbpubkey:/avb/s-gsi.avbpubkey";
+    static constexpr char kDsuKeysDir[] = "/avb";
     // Convert userdata
     // Inherit fstab properties for userdata.
     FstabEntry userdata;
@@ -655,8 +594,8 @@
         userdata.blk_device = "userdata_gsi";
         userdata.fs_mgr_flags.logical = true;
         userdata.fs_mgr_flags.formattable = true;
-        if (!userdata.key_dir.empty()) {
-            userdata.key_dir += "/gsi";
+        if (!userdata.metadata_key_dir.empty()) {
+            userdata.metadata_key_dir += "/gsi";
         }
     } else {
         userdata = BuildDsuUserdataFstabEntry();
@@ -692,29 +631,18 @@
                     .fs_type = "ext4",
                     .flags = MS_RDONLY,
                     .fs_options = "barrier=1",
-                    .avb_keys = kGsiKeys,
+                    .avb_keys = kDsuKeysDir,
             };
             entry.fs_mgr_flags.wait = true;
             entry.fs_mgr_flags.logical = true;
             entry.fs_mgr_flags.first_stage_mount = true;
-            // Use the system key which may be in the vbmeta or vbmeta_system
-            // TODO: b/141284191
-            entry.vbmeta_partition = "vbmeta";
-            fstab->emplace_back(entry);
-            entry.vbmeta_partition = "vbmeta_system";
-            fstab->emplace_back(entry);
         } else {
             // If the corresponding partition exists, transform all its Fstab
             // by pointing .blk_device to the DSU partition.
             for (auto&& entry : entries) {
                 entry->blk_device = partition;
-                if (entry->avb_keys.size() > 0) {
-                    entry->avb_keys += ":";
-                }
-                // If the DSU is signed by OEM, the original Fstab already has the information
-                // required by avb, otherwise the DSU is GSI and will need the avb_keys as listed
-                // below.
-                entry->avb_keys += kGsiKeys;
+                // AVB keys for DSU should always be under kDsuKeysDir.
+                entry->avb_keys += kDsuKeysDir;
             }
             // Make sure the ext4 is included to support GSI.
             auto partition_ext4 =
@@ -873,6 +801,89 @@
     return entries;
 }
 
+static std::string ResolveBlockDevice(const std::string& block_device) {
+    if (!StartsWith(block_device, "/dev/block/")) {
+        LWARNING << block_device << " is not a block device";
+        return block_device;
+    }
+    std::string name = block_device.substr(5);
+    if (!StartsWith(name, "block/dm-")) {
+        // Not a dm-device, but might be a symlink. Optimistically try to readlink.
+        std::string result;
+        if (Readlink(block_device, &result)) {
+            return result;
+        } else if (errno == EINVAL) {
+            // After all, it wasn't a symlink.
+            return block_device;
+        } else {
+            LERROR << "Failed to readlink " << block_device;
+            return "";
+        }
+    }
+    // It's a dm-device, let's find what's inside!
+    std::string sys_dir = "/sys/" + name;
+    while (true) {
+        std::string slaves_dir = sys_dir + "/slaves";
+        std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(slaves_dir.c_str()), closedir);
+        if (!dir) {
+            LERROR << "Failed to open " << slaves_dir;
+            return "";
+        }
+        std::string sub_device_name = "";
+        for (auto entry = readdir(dir.get()); entry; entry = readdir(dir.get())) {
+            if (entry->d_type != DT_LNK) continue;
+            if (!sub_device_name.empty()) {
+                LERROR << "Too many slaves in " << slaves_dir;
+                return "";
+            }
+            sub_device_name = entry->d_name;
+        }
+        if (sub_device_name.empty()) {
+            LERROR << "No slaves in " << slaves_dir;
+            return "";
+        }
+        if (!StartsWith(sub_device_name, "dm-")) {
+            // Not a dm-device! We can stop now.
+            return "/dev/block/" + sub_device_name;
+        }
+        // Still a dm-device, keep digging.
+        sys_dir = "/sys/block/" + sub_device_name;
+    }
+}
+
+FstabEntry* GetMountedEntryForUserdata(Fstab* fstab) {
+    Fstab mounts;
+    if (!ReadFstabFromFile("/proc/mounts", &mounts)) {
+        LERROR << "Failed to read /proc/mounts";
+        return nullptr;
+    }
+    auto mounted_entry = GetEntryForMountPoint(&mounts, "/data");
+    if (mounted_entry == nullptr) {
+        LWARNING << "/data is not mounted";
+        return nullptr;
+    }
+    std::string resolved_block_device = ResolveBlockDevice(mounted_entry->blk_device);
+    if (resolved_block_device.empty()) {
+        return nullptr;
+    }
+    LINFO << "/data is mounted on " << resolved_block_device;
+    for (auto& entry : *fstab) {
+        if (entry.mount_point != "/data") {
+            continue;
+        }
+        std::string block_device;
+        if (!Readlink(entry.blk_device, &block_device)) {
+            LWARNING << "Failed to readlink " << entry.blk_device;
+            block_device = entry.blk_device;
+        }
+        if (block_device == resolved_block_device) {
+            return &entry;
+        }
+    }
+    LERROR << "Didn't find entry that was used to mount /data";
+    return nullptr;
+}
+
 std::set<std::string> GetBootDevices() {
     // First check the kernel commandline, then try the device tree otherwise
     std::string dt_file_name = get_android_dt_dir() + "/boot_devices";
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index 0579a3d..2bc53d3 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -48,15 +48,21 @@
 #include <fs_mgr_overlayfs.h>
 #include <fstab/fstab.h>
 #include <libdm/dm.h>
+#include <libfiemap/image_manager.h>
 #include <libgsi/libgsi.h>
 #include <liblp/builder.h>
 #include <liblp/liblp.h>
+#include <storage_literals/storage_literals.h>
 
 #include "fs_mgr_priv.h"
+#include "libfiemap/utility.h"
 
 using namespace std::literals;
 using namespace android::dm;
 using namespace android::fs_mgr;
+using namespace android::storage_literals;
+using android::fiemap::FilesystemHasReliablePinning;
+using android::fiemap::IImageManager;
 
 namespace {
 
@@ -104,6 +110,14 @@
     return false;
 }
 
+namespace android {
+namespace fs_mgr {
+
+void MapScratchPartitionIfNeeded(Fstab*,
+                                 const std::function<bool(const std::set<std::string>&)>&) {}
+}  // namespace fs_mgr
+}  // namespace android
+
 #else  // ALLOW_ADBD_DISABLE_VERITY == 0
 
 namespace {
@@ -153,6 +167,12 @@
 }
 
 const auto kPhysicalDevice = "/dev/block/by-name/"s;
+constexpr char kScratchImageMetadata[] = "/metadata/gsi/remount/lp_metadata";
+
+// Note: this is meant only for recovery/first-stage init.
+bool ScratchIsOnData() {
+    return fs_mgr_access(kScratchImageMetadata);
+}
 
 bool fs_mgr_update_blk_device(FstabEntry* entry) {
     if (entry->fs_mgr_flags.logical) {
@@ -440,27 +460,40 @@
     rmdir(kScratchMountPoint.c_str());
 }
 
-// reduce 'DM_DEV_STATUS failed for scratch: No such device or address' noise
-std::string scratch_device_cache;
-
 bool fs_mgr_overlayfs_teardown_scratch(const std::string& overlay, bool* change) {
     // umount and delete kScratchMountPoint storage if we have logical partitions
     if (overlay != kScratchMountPoint) return true;
-    scratch_device_cache.erase();
-    auto slot_number = fs_mgr_overlayfs_slot_number();
-    auto super_device = fs_mgr_overlayfs_super_device(slot_number);
-    if (!fs_mgr_rw_access(super_device)) return true;
 
     auto save_errno = errno;
     if (fs_mgr_overlayfs_already_mounted(kScratchMountPoint, false)) {
         fs_mgr_overlayfs_umount_scratch();
     }
+
+    const auto partition_name = android::base::Basename(kScratchMountPoint);
+
+    auto images = IImageManager::Open("remount", 10s);
+    if (images && images->BackingImageExists(partition_name)) {
+#if defined __ANDROID_RECOVERY__
+        if (!images->DisableImage(partition_name)) {
+            return false;
+        }
+#else
+        if (!images->UnmapImageIfExists(partition_name) ||
+            !images->DeleteBackingImage(partition_name)) {
+            return false;
+        }
+#endif
+    }
+
+    auto slot_number = fs_mgr_overlayfs_slot_number();
+    auto super_device = fs_mgr_overlayfs_super_device(slot_number);
+    if (!fs_mgr_rw_access(super_device)) return true;
+
     auto builder = MetadataBuilder::New(super_device, slot_number);
     if (!builder) {
         errno = save_errno;
         return true;
     }
-    const auto partition_name = android::base::Basename(kScratchMountPoint);
     if (builder->FindPartition(partition_name) == nullptr) {
         errno = save_errno;
         return true;
@@ -815,26 +848,49 @@
     return "auto";
 }
 
-std::string fs_mgr_overlayfs_scratch_device() {
-    if (!scratch_device_cache.empty()) return scratch_device_cache;
-
-    // Is this a multiple super device (retrofit)?
+// Note: we do not check access() here except for the super partition, since
+// in first-stage init we wouldn't have registed by-name symlinks for "other"
+// partitions that won't be mounted.
+static std::string GetPhysicalScratchDevice() {
     auto slot_number = fs_mgr_overlayfs_slot_number();
     auto super_device = fs_mgr_overlayfs_super_device(slot_number);
     auto path = fs_mgr_overlayfs_super_device(slot_number == 0);
-    if (super_device == path) {
-        // Create from within single super device;
-        auto& dm = DeviceMapper::Instance();
-        const auto partition_name = android::base::Basename(kScratchMountPoint);
-        if (!dm.GetDmDevicePathByName(partition_name, &path)) {
-            // non-DAP A/B device?
-            if (fs_mgr_access(super_device)) return "";
-            auto other_slot = fs_mgr_get_other_slot_suffix();
-            if (other_slot.empty()) return "";
-            path = kPhysicalDevice + "system" + other_slot;
-        }
+    if (super_device != path) {
+        return path;
     }
-    return scratch_device_cache = path;
+    if (fs_mgr_access(super_device)) {
+        // Do not try to use system_other on a DAP device.
+        return "";
+    }
+
+    auto other_slot = fs_mgr_get_other_slot_suffix();
+    if (!other_slot.empty()) {
+        return kPhysicalDevice + "system" + other_slot;
+    }
+    return "";
+}
+
+// This returns the scratch device that was detected during early boot (first-
+// stage init). If the device was created later, for example during setup for
+// the adb remount command, it can return an empty string since it does not
+// query ImageManager. (Note that ImageManager in first-stage init will always
+// use device-mapper, since /data is not available to use loop devices.)
+static std::string GetBootScratchDevice() {
+    auto& dm = DeviceMapper::Instance();
+
+    // If there is a scratch partition allocated in /data or on super, we
+    // automatically prioritize that over super_other or system_other.
+    // Some devices, for example, have a write-protected eMMC and the
+    // super partition cannot be used even if it exists.
+    std::string device;
+    auto partition_name = android::base::Basename(kScratchMountPoint);
+    if (dm.GetState(partition_name) != DmDeviceState::INVALID &&
+        dm.GetDmDevicePathByName(partition_name, &device)) {
+        return device;
+    }
+
+    // There is no dynamic scratch, so try and find a physical one.
+    return GetPhysicalScratchDevice();
 }
 
 bool fs_mgr_overlayfs_make_scratch(const std::string& scratch_device, const std::string& mnt_type) {
@@ -878,26 +934,22 @@
     }
 }
 
-// This is where we find and steal backing storage from the system.
-bool fs_mgr_overlayfs_create_scratch(const Fstab& fstab, std::string* scratch_device,
-                                     bool* partition_exists, bool* change) {
-    *scratch_device = fs_mgr_overlayfs_scratch_device();
-    *partition_exists = fs_mgr_rw_access(*scratch_device);
+// Create or update a scratch partition within super.
+static bool CreateDynamicScratch(std::string* scratch_device, bool* partition_exists,
+                                 bool* change) {
+    const auto partition_name = android::base::Basename(kScratchMountPoint);
+
+    auto& dm = DeviceMapper::Instance();
+    *partition_exists = dm.GetState(partition_name) != DmDeviceState::INVALID;
+
     auto partition_create = !*partition_exists;
-    // Do we need to create a logical "scratch" partition?
-    if (!partition_create && android::base::StartsWith(*scratch_device, kPhysicalDevice)) {
-        return true;
-    }
     auto slot_number = fs_mgr_overlayfs_slot_number();
     auto super_device = fs_mgr_overlayfs_super_device(slot_number);
-    if (!fs_mgr_rw_access(super_device)) return false;
-    if (!fs_mgr_overlayfs_has_logical(fstab)) return false;
     auto builder = MetadataBuilder::New(super_device, slot_number);
     if (!builder) {
         LERROR << "open " << super_device << " metadata";
         return false;
     }
-    const auto partition_name = android::base::Basename(kScratchMountPoint);
     auto partition = builder->FindPartition(partition_name);
     *partition_exists = partition != nullptr;
     auto changed = false;
@@ -978,6 +1030,92 @@
     return true;
 }
 
+static bool CreateScratchOnData(std::string* scratch_device, bool* partition_exists, bool* change) {
+    *partition_exists = false;
+    *change = false;
+
+    auto images = IImageManager::Open("remount", 10s);
+    if (!images) {
+        return false;
+    }
+
+    auto partition_name = android::base::Basename(kScratchMountPoint);
+    if (images->GetMappedImageDevice(partition_name, scratch_device)) {
+        *partition_exists = true;
+        return true;
+    }
+
+    BlockDeviceInfo info;
+    PartitionOpener opener;
+    if (!opener.GetInfo(fs_mgr_get_super_partition_name(), &info)) {
+        LERROR << "could not get block device info for super";
+        return false;
+    }
+
+    *change = true;
+
+    // Note: calling RemoveDisabledImages here ensures that we do not race with
+    // clean_scratch_files and accidentally try to map an image that will be
+    // deleted.
+    if (!images->RemoveDisabledImages()) {
+        return false;
+    }
+    if (!images->BackingImageExists(partition_name)) {
+        static constexpr uint64_t kMinimumSize = 16_MiB;
+        static constexpr uint64_t kMaximumSize = 2_GiB;
+
+        uint64_t size = std::clamp(info.size / 2, kMinimumSize, kMaximumSize);
+        auto flags = IImageManager::CREATE_IMAGE_DEFAULT;
+
+        if (!images->CreateBackingImage(partition_name, size, flags)) {
+            LERROR << "could not create scratch image of " << size << " bytes";
+            return false;
+        }
+    }
+    if (!images->MapImageDevice(partition_name, 10s, scratch_device)) {
+        LERROR << "could not map scratch image";
+        return false;
+    }
+    return true;
+}
+
+static bool CanUseSuperPartition(const Fstab& fstab, bool* is_virtual_ab) {
+    auto slot_number = fs_mgr_overlayfs_slot_number();
+    auto super_device = fs_mgr_overlayfs_super_device(slot_number);
+    if (!fs_mgr_rw_access(super_device) || !fs_mgr_overlayfs_has_logical(fstab)) {
+        return false;
+    }
+    auto metadata = ReadMetadata(super_device, slot_number);
+    if (!metadata) {
+        return false;
+    }
+    *is_virtual_ab = !!(metadata->header.flags & LP_HEADER_FLAG_VIRTUAL_AB_DEVICE);
+    return true;
+}
+
+bool fs_mgr_overlayfs_create_scratch(const Fstab& fstab, std::string* scratch_device,
+                                     bool* partition_exists, bool* change) {
+    // Try a physical partition first.
+    *scratch_device = GetPhysicalScratchDevice();
+    if (!scratch_device->empty() && fs_mgr_rw_access(*scratch_device)) {
+        *partition_exists = true;
+        return true;
+    }
+
+    // If that fails, see if we can land on super.
+    bool is_virtual_ab;
+    if (CanUseSuperPartition(fstab, &is_virtual_ab)) {
+        bool can_use_data = false;
+        if (is_virtual_ab && FilesystemHasReliablePinning("/data", &can_use_data) && can_use_data) {
+            return CreateScratchOnData(scratch_device, partition_exists, change);
+        }
+        return CreateDynamicScratch(scratch_device, partition_exists, change);
+    }
+
+    errno = ENXIO;
+    return false;
+}
+
 // Create and mount kScratchMountPoint storage if we have logical partitions
 bool fs_mgr_overlayfs_setup_scratch(const Fstab& fstab, bool* change) {
     if (fs_mgr_overlayfs_already_mounted(kScratchMountPoint, false)) return true;
@@ -1012,19 +1150,6 @@
     return fs_mgr_overlayfs_mount_scratch(scratch_device, mnt_type);
 }
 
-bool fs_mgr_overlayfs_scratch_can_be_mounted(const std::string& scratch_device) {
-    if (scratch_device.empty()) return false;
-    if (fs_mgr_overlayfs_already_mounted(kScratchMountPoint, false)) return false;
-    if (android::base::StartsWith(scratch_device, kPhysicalDevice)) return true;
-    if (fs_mgr_rw_access(scratch_device)) return true;
-    auto slot_number = fs_mgr_overlayfs_slot_number();
-    auto super_device = fs_mgr_overlayfs_super_device(slot_number);
-    if (!fs_mgr_rw_access(super_device)) return false;
-    auto builder = MetadataBuilder::New(super_device, slot_number);
-    if (!builder) return false;
-    return builder->FindPartition(android::base::Basename(kScratchMountPoint)) != nullptr;
-}
-
 bool fs_mgr_overlayfs_invalid() {
     if (fs_mgr_overlayfs_valid() == OverlayfsValidResult::kNotSupported) return true;
 
@@ -1066,6 +1191,30 @@
     return candidates;
 }
 
+static void TryMountScratch() {
+    // Note we get the boot scratch device here, which means if scratch was
+    // just created through ImageManager, this could fail. In practice this
+    // should not happen because "remount" detects this scenario (by checking
+    // if verity is still disabled, i.e. no reboot occurred), and skips calling
+    // fs_mgr_overlayfs_mount_all().
+    auto scratch_device = GetBootScratchDevice();
+    if (!fs_mgr_rw_access(scratch_device)) {
+        return;
+    }
+    if (!WaitForFile(scratch_device, 10s)) {
+        return;
+    }
+    const auto mount_type = fs_mgr_overlayfs_scratch_mount_type();
+    if (!fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type, true /* readonly */)) {
+        return;
+    }
+    auto has_overlayfs_dir = fs_mgr_access(kScratchMountPoint + kOverlayTopDir);
+    fs_mgr_overlayfs_umount_scratch();
+    if (has_overlayfs_dir) {
+        fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type);
+    }
+}
+
 bool fs_mgr_overlayfs_mount_all(Fstab* fstab) {
     auto ret = false;
     if (fs_mgr_overlayfs_invalid()) return ret;
@@ -1080,42 +1229,13 @@
         }
         if (scratch_can_be_mounted) {
             scratch_can_be_mounted = false;
-            auto scratch_device = fs_mgr_overlayfs_scratch_device();
-            if (fs_mgr_overlayfs_scratch_can_be_mounted(scratch_device) &&
-                WaitForFile(scratch_device, 10s)) {
-                const auto mount_type = fs_mgr_overlayfs_scratch_mount_type();
-                if (fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type,
-                                                   true /* readonly */)) {
-                    auto has_overlayfs_dir = fs_mgr_access(kScratchMountPoint + kOverlayTopDir);
-                    fs_mgr_overlayfs_umount_scratch();
-                    if (has_overlayfs_dir) {
-                        fs_mgr_overlayfs_mount_scratch(scratch_device, mount_type);
-                    }
-                }
-            }
+            TryMountScratch();
         }
         if (fs_mgr_overlayfs_mount(mount_point)) ret = true;
     }
     return ret;
 }
 
-std::vector<std::string> fs_mgr_overlayfs_required_devices(Fstab* fstab) {
-    if (fs_mgr_overlayfs_invalid()) return {};
-
-    if (GetEntryForMountPoint(fstab, kScratchMountPoint) != nullptr) {
-        return {};
-    }
-
-    for (const auto& entry : fs_mgr_overlayfs_candidate_list(*fstab)) {
-        if (fs_mgr_is_verity_enabled(entry)) continue;
-        if (fs_mgr_overlayfs_already_mounted(fs_mgr_mount_point(entry.mount_point))) continue;
-        auto device = fs_mgr_overlayfs_scratch_device();
-        if (!fs_mgr_overlayfs_scratch_can_be_mounted(device)) break;
-        return {device};
-    }
-    return {};
-}
-
 // Returns false if setup not permitted, errno set to last error.
 // If something is altered, set *change.
 bool fs_mgr_overlayfs_setup(const char* backing, const char* mount_point, bool* change,
@@ -1181,29 +1301,76 @@
     return ret;
 }
 
+static bool EnsureScratchMapped(std::string* device, bool* mapped) {
+    *mapped = false;
+    *device = GetBootScratchDevice();
+    if (!device->empty()) {
+        return true;
+    }
+
+    auto partition_name = android::base::Basename(kScratchMountPoint);
+
+    // Check for scratch on /data first, before looking for a modified super
+    // partition. We should only reach this code in recovery, because scratch
+    // would otherwise always be mapped.
+    auto images = IImageManager::Open("remount", 10s);
+    if (images && images->BackingImageExists(partition_name)) {
+        if (!images->MapImageDevice(partition_name, 10s, device)) {
+            return false;
+        }
+        *mapped = true;
+        return true;
+    }
+
+    // Avoid uart spam by first checking for a scratch partition.
+    auto metadata_slot = fs_mgr_overlayfs_slot_number();
+    auto super_device = fs_mgr_overlayfs_super_device(metadata_slot);
+    auto metadata = ReadCurrentMetadata(super_device);
+    if (!metadata) {
+        return false;
+    }
+
+    auto partition = FindPartition(*metadata.get(), partition_name);
+    if (!partition) {
+        return false;
+    }
+
+    CreateLogicalPartitionParams params = {
+            .block_device = super_device,
+            .metadata = metadata.get(),
+            .partition = partition,
+            .force_writable = true,
+            .timeout_ms = 10s,
+    };
+    if (!CreateLogicalPartition(params, device)) {
+        return false;
+    }
+    *mapped = true;
+    return true;
+}
+
+static void UnmapScratchDevice() {
+    // This should only be reachable in recovery, where scratch is not
+    // automatically mapped and therefore can be unmapped.
+    DestroyLogicalPartition(android::base::Basename(kScratchMountPoint));
+}
+
 // Returns false if teardown not permitted, errno set to last error.
 // If something is altered, set *change.
 bool fs_mgr_overlayfs_teardown(const char* mount_point, bool* change) {
     if (change) *change = false;
     auto ret = true;
+
     // If scratch exists, but is not mounted, lets gain access to clean
     // specific override entries.
     auto mount_scratch = false;
+    bool unmap = false;
     if ((mount_point != nullptr) && !fs_mgr_overlayfs_already_mounted(kScratchMountPoint, false)) {
-        auto scratch_device = fs_mgr_overlayfs_scratch_device();
-        if (scratch_device.empty()) {
-            auto metadata_slot = fs_mgr_overlayfs_slot_number();
-            CreateLogicalPartitionParams params = {
-                    .block_device = fs_mgr_overlayfs_super_device(metadata_slot),
-                    .metadata_slot = metadata_slot,
-                    .partition_name = android::base::Basename(kScratchMountPoint),
-                    .force_writable = true,
-                    .timeout_ms = 10s,
-            };
-            CreateLogicalPartition(params, &scratch_device);
+        std::string scratch_device;
+        if (EnsureScratchMapped(&scratch_device, &unmap)) {
+            mount_scratch = fs_mgr_overlayfs_mount_scratch(scratch_device,
+                                                           fs_mgr_overlayfs_scratch_mount_type());
         }
-        mount_scratch = fs_mgr_overlayfs_mount_scratch(scratch_device,
-                                                       fs_mgr_overlayfs_scratch_mount_type());
     }
     for (const auto& overlay_mount_point : kOverlayMountPoints) {
         ret &= fs_mgr_overlayfs_teardown_one(
@@ -1222,8 +1389,12 @@
         PERROR << "teardown";
         ret = false;
     }
-    if (mount_scratch) fs_mgr_overlayfs_umount_scratch();
-
+    if (mount_scratch) {
+        fs_mgr_overlayfs_umount_scratch();
+    }
+    if (unmap) {
+        UnmapScratchDevice();
+    }
     return ret;
 }
 
@@ -1241,6 +1412,59 @@
     return false;
 }
 
+namespace android {
+namespace fs_mgr {
+
+void MapScratchPartitionIfNeeded(Fstab* fstab,
+                                 const std::function<bool(const std::set<std::string>&)>& init) {
+    if (fs_mgr_overlayfs_invalid()) {
+        return;
+    }
+    if (GetEntryForMountPoint(fstab, kScratchMountPoint) != nullptr) {
+        return;
+    }
+
+    bool want_scratch = false;
+    for (const auto& entry : fs_mgr_overlayfs_candidate_list(*fstab)) {
+        if (fs_mgr_is_verity_enabled(entry)) {
+            continue;
+        }
+        if (fs_mgr_overlayfs_already_mounted(fs_mgr_mount_point(entry.mount_point))) {
+            continue;
+        }
+        want_scratch = true;
+        break;
+    }
+    if (!want_scratch) {
+        return;
+    }
+
+    if (ScratchIsOnData()) {
+        if (auto images = IImageManager::Open("remount", 0ms)) {
+            images->MapAllImages(init);
+        }
+    }
+
+    // Physical or logical partitions will have already been mapped here,
+    // so just ensure /dev/block symlinks exist.
+    auto device = GetBootScratchDevice();
+    if (!device.empty()) {
+        init({android::base::Basename(device)});
+    }
+}
+
+void CleanupOldScratchFiles() {
+    if (!ScratchIsOnData()) {
+        return;
+    }
+    if (auto images = IImageManager::Open("remount", 0ms)) {
+        images->RemoveDisabledImages();
+    }
+}
+
+}  // namespace fs_mgr
+}  // namespace android
+
 #endif  // ALLOW_ADBD_DISABLE_VERITY != 0
 
 bool fs_mgr_has_shared_blocks(const std::string& mount_point, const std::string& dev) {
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index bdec7be..9bc38f9 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -46,7 +46,9 @@
 enum mount_mode {
     MOUNT_MODE_DEFAULT = 0,
     MOUNT_MODE_EARLY = 1,
-    MOUNT_MODE_LATE = 2
+    MOUNT_MODE_LATE = 2,
+    // TODO(b/135984674): remove this after refactoring fs_mgr_mount_all.
+    MOUNT_MODE_ONLY_USERDATA = 3
 };
 
 #define FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED 7
@@ -105,6 +107,8 @@
 // it destroys verity devices from device mapper after the device is unmounted.
 int fs_mgr_umount_all(android::fs_mgr::Fstab* fstab);
 
+int fs_mgr_remount_userdata_into_checkpointing(android::fs_mgr::Fstab* fstab);
+
 // Finds the dm_bow device on which this block device is stacked, or returns
 // empty string
 std::string fs_mgr_find_bow_device(const std::string& block_device);
diff --git a/fs_mgr/include/fs_mgr_overlayfs.h b/fs_mgr/include/fs_mgr_overlayfs.h
index 9a7381f..34aded9 100644
--- a/fs_mgr/include/fs_mgr_overlayfs.h
+++ b/fs_mgr/include/fs_mgr_overlayfs.h
@@ -16,8 +16,11 @@
 
 #pragma once
 
+#include <functional>
+
 #include <fstab/fstab.h>
 
+#include <set>
 #include <string>
 #include <vector>
 
@@ -38,3 +41,13 @@
     kOverrideCredsRequired,
 };
 OverlayfsValidResult fs_mgr_overlayfs_valid();
+
+namespace android {
+namespace fs_mgr {
+
+void MapScratchPartitionIfNeeded(Fstab* fstab,
+                                 const std::function<bool(const std::set<std::string>&)>& init);
+void CleanupOldScratchFiles();
+
+}  // namespace fs_mgr
+}  // namespace android
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index 3c517dc..4dc09c1 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -37,7 +37,8 @@
     unsigned long flags = 0;
     std::string fs_options;
     std::string key_loc;
-    std::string key_dir;
+    std::string metadata_key_dir;
+    std::string metadata_cipher;
     off64_t length = 0;
     std::string label;
     int partnum = -1;
@@ -45,9 +46,7 @@
     int max_comp_streams = 0;
     off64_t zram_size = 0;
     off64_t reserved_size = 0;
-    std::string file_contents_mode;
-    std::string file_names_mode;
-    int file_policy_version = 0;
+    std::string encryption_options;
     off64_t erase_blk_size = 0;
     off64_t logical_blk_size = 0;
     std::string sysfs_path;
@@ -104,6 +103,7 @@
 FstabEntry* GetEntryForMountPoint(Fstab* fstab, const std::string& path);
 // The Fstab can contain multiple entries for the same mount point with different configurations.
 std::vector<FstabEntry*> GetEntriesForMountPoint(Fstab* fstab, const std::string& path);
+FstabEntry* GetMountedEntryForUserdata(Fstab* fstab);
 
 // This method builds DSU fstab entries and transfer the fstab.
 //
diff --git a/fs_mgr/libdm/Android.bp b/fs_mgr/libdm/Android.bp
index 3ce909e..1c3427f 100644
--- a/fs_mgr/libdm/Android.bp
+++ b/fs_mgr/libdm/Android.bp
@@ -54,34 +54,37 @@
 }
 
 cc_defaults {
-    name: "libdm_defaults",
+    name: "libdm_test_defaults",
     defaults: ["fs_mgr_defaults"],
     static_libs: [
         "libdm",
+    ],
+    shared_libs: [
         "libbase",
         "libext2_uuid",
         "libfs_mgr",
         "liblog",
     ],
     srcs: [":libdm_test_srcs"],
+    auto_gen_config: true,
+    require_root: true,
 }
 
 cc_test {
     name: "libdm_test",
-    defaults: ["libdm_defaults"],
+    defaults: ["libdm_test_defaults"],
+    test_suites: ["device-tests"],
 }
 
 cc_test {
     name: "vts_libdm_test",
-    defaults: ["libdm_defaults"],
+    defaults: ["libdm_test_defaults"],
     test_suites: ["vts-core"],
-    auto_gen_config: true,
-    require_root: true,
     test_min_api_level: 29,
 }
 
 cc_fuzz {
-  name: "dm_table_fuzzer",
+  name: "dm_linear_table_fuzzer",
   defaults: ["fs_mgr_defaults"],
   srcs: [
     "dm_linear_fuzzer.cpp",
diff --git a/fs_mgr/libdm/dm.cpp b/fs_mgr/libdm/dm.cpp
index e7a3ff2..254fbed 100644
--- a/fs_mgr/libdm/dm.cpp
+++ b/fs_mgr/libdm/dm.cpp
@@ -16,11 +16,14 @@
 
 #include "libdm/dm.h"
 
+#include <linux/dm-ioctl.h>
 #include <sys/ioctl.h>
 #include <sys/sysmacros.h>
 #include <sys/types.h>
 
+#include <chrono>
 #include <functional>
+#include <string_view>
 #include <thread>
 
 #include <android-base/file.h>
@@ -79,14 +82,24 @@
     return true;
 }
 
-bool DeviceMapper::DeleteDeviceIfExists(const std::string& name) {
+bool DeviceMapper::DeleteDeviceIfExists(const std::string& name,
+                                        const std::chrono::milliseconds& timeout_ms) {
     if (GetState(name) == DmDeviceState::INVALID) {
         return true;
     }
-    return DeleteDevice(name);
+    return DeleteDevice(name, timeout_ms);
 }
 
-bool DeviceMapper::DeleteDevice(const std::string& name) {
+bool DeviceMapper::DeleteDeviceIfExists(const std::string& name) {
+    return DeleteDeviceIfExists(name, 0ms);
+}
+
+bool DeviceMapper::DeleteDevice(const std::string& name,
+                                const std::chrono::milliseconds& timeout_ms) {
+    std::string unique_path;
+    if (!GetDeviceUniquePath(name, &unique_path)) {
+        LOG(ERROR) << "Failed to get unique path for device " << name;
+    }
     struct dm_ioctl io;
     InitIo(&io, name);
 
@@ -100,9 +113,23 @@
     CHECK(io.flags & DM_UEVENT_GENERATED_FLAG)
             << "Didn't generate uevent for [" << name << "] removal";
 
+    if (timeout_ms <= std::chrono::milliseconds::zero()) {
+        return true;
+    }
+    if (unique_path.empty()) {
+        return false;
+    }
+    if (!WaitForFileDeleted(unique_path, timeout_ms)) {
+        LOG(ERROR) << "Timeout out waiting for " << unique_path << " to be deleted";
+        return false;
+    }
     return true;
 }
 
+bool DeviceMapper::DeleteDevice(const std::string& name) {
+    return DeleteDevice(name, 0ms);
+}
+
 static std::string GenerateUuid() {
     uuid_t uuid_bytes;
     uuid_generate(uuid_bytes);
@@ -479,5 +506,78 @@
     return std::string{spec.target_type, sizeof(spec.target_type)};
 }
 
+static bool ExtractBlockDeviceName(const std::string& path, std::string* name) {
+    static constexpr std::string_view kDevBlockPrefix("/dev/block/");
+    if (android::base::StartsWith(path, kDevBlockPrefix)) {
+        *name = path.substr(kDevBlockPrefix.length());
+        return true;
+    }
+    return false;
+}
+
+bool DeviceMapper::IsDmBlockDevice(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        return false;
+    }
+    return android::base::StartsWith(name, "dm-");
+}
+
+std::optional<std::string> DeviceMapper::GetDmDeviceNameByPath(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        LOG(WARNING) << path << " is not a block device";
+        return std::nullopt;
+    }
+    if (!android::base::StartsWith(name, "dm-")) {
+        LOG(WARNING) << path << " is not a dm device";
+        return std::nullopt;
+    }
+    std::string dm_name_file = "/sys/block/" + name + "/dm/name";
+    std::string dm_name;
+    if (!android::base::ReadFileToString(dm_name_file, &dm_name)) {
+        PLOG(ERROR) << "Failed to read file " << dm_name_file;
+        return std::nullopt;
+    }
+    dm_name = android::base::Trim(dm_name);
+    return dm_name;
+}
+
+std::optional<std::string> DeviceMapper::GetParentBlockDeviceByPath(const std::string& path) {
+    std::string name;
+    if (!ExtractBlockDeviceName(path, &name)) {
+        LOG(WARNING) << path << " is not a block device";
+        return std::nullopt;
+    }
+    if (!android::base::StartsWith(name, "dm-")) {
+        // Reached bottom of the device mapper stack.
+        return std::nullopt;
+    }
+    auto slaves_dir = "/sys/block/" + name + "/slaves";
+    auto dir = std::unique_ptr<DIR, decltype(&closedir)>(opendir(slaves_dir.c_str()), closedir);
+    if (dir == nullptr) {
+        PLOG(ERROR) << "Failed to open: " << slaves_dir;
+        return std::nullopt;
+    }
+    std::string sub_device_name = "";
+    for (auto entry = readdir(dir.get()); entry; entry = readdir(dir.get())) {
+        if (entry->d_type != DT_LNK) continue;
+        if (!sub_device_name.empty()) {
+            LOG(ERROR) << "Too many slaves in " << slaves_dir;
+            return std::nullopt;
+        }
+        sub_device_name = entry->d_name;
+    }
+    if (sub_device_name.empty()) {
+        LOG(ERROR) << "No slaves in " << slaves_dir;
+        return std::nullopt;
+    }
+    return "/dev/block/" + sub_device_name;
+}
+
+bool DeviceMapper::TargetInfo::IsOverflowSnapshot() const {
+    return spec.target_type == "snapshot"s && data == "Overflow"s;
+}
+
 }  // namespace dm
 }  // namespace android
diff --git a/fs_mgr/libdm/dm_linear_fuzzer.cpp b/fs_mgr/libdm/dm_linear_fuzzer.cpp
index b119635..8462901 100644
--- a/fs_mgr/libdm/dm_linear_fuzzer.cpp
+++ b/fs_mgr/libdm/dm_linear_fuzzer.cpp
@@ -76,7 +76,7 @@
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     uint64_t val[6];
 
-    if (size != sizeof(*val)) {
+    if (size != sizeof(val)) {
         return 0;
     }
 
diff --git a/fs_mgr/libdm/dm_target.cpp b/fs_mgr/libdm/dm_target.cpp
index 65f6e12..d7b689e 100644
--- a/fs_mgr/libdm/dm_target.cpp
+++ b/fs_mgr/libdm/dm_target.cpp
@@ -243,9 +243,49 @@
     return android::base::Join(argv, " ");
 }
 
+const std::string DmTargetDefaultKey::name_ = "default-key";
+
+bool DmTargetDefaultKey::IsLegacy(bool* result) {
+    DeviceMapper& dm = DeviceMapper::Instance();
+    DmTargetTypeInfo info;
+    if (!dm.GetTargetByName(name_, &info)) return false;
+    // dm-default-key was modified to be like dm-crypt with version 2
+    *result = !info.IsAtLeast(2, 0, 0);
+    return true;
+}
+
+bool DmTargetDefaultKey::Valid() const {
+    bool real_is_legacy;
+    if (!DmTargetDefaultKey::IsLegacy(&real_is_legacy)) return false;
+    if (real_is_legacy != is_legacy_) return false;
+    if (!is_legacy_ && !set_dun_) return false;
+    return true;
+}
+
 std::string DmTargetDefaultKey::GetParameterString() const {
-    return cipher_ + " " + key_ + " " + blockdev_ + " " + std::to_string(start_sector_) +
-           (set_dun_ ? " 1 set_dun" : "");
+    std::vector<std::string> argv;
+    argv.emplace_back(cipher_);
+    argv.emplace_back(key_);
+    if (!is_legacy_) {
+        argv.emplace_back("0");  // iv_offset
+    }
+    argv.emplace_back(blockdev_);
+    argv.push_back(std::to_string(start_sector_));
+    std::vector<std::string> extra_argv;
+    if (is_legacy_) {
+        if (set_dun_) {  // v2 always sets the DUN.
+            extra_argv.emplace_back("set_dun");
+        }
+    } else {
+        extra_argv.emplace_back("allow_discards");
+        extra_argv.emplace_back("sector_size:4096");
+        extra_argv.emplace_back("iv_large_sectors");
+    }
+    if (!extra_argv.empty()) {
+        argv.emplace_back(std::to_string(extra_argv.size()));
+        argv.insert(argv.end(), extra_argv.begin(), extra_argv.end());
+    }
+    return android::base::Join(argv, " ");
 }
 
 }  // namespace dm
diff --git a/fs_mgr/libdm/dm_test.cpp b/fs_mgr/libdm/dm_test.cpp
index ed2fa83..affdd29 100644
--- a/fs_mgr/libdm/dm_test.cpp
+++ b/fs_mgr/libdm/dm_test.cpp
@@ -29,6 +29,7 @@
 #include <thread>
 
 #include <android-base/file.h>
+#include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <gtest/gtest.h>
 #include <libdm/dm.h>
@@ -515,8 +516,109 @@
 }
 
 TEST(libdm, DefaultKeyArgs) {
-    DmTargetDefaultKey target(0, 4096, "AES-256-XTS", "abcdef0123456789", "/dev/loop0", 0);
+    DmTargetTypeInfo info;
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    if (!dm.GetTargetByName("default-key", &info)) {
+        cout << "default-key module not enabled; skipping test" << std::endl;
+        return;
+    }
+    bool is_legacy;
+    ASSERT_TRUE(DmTargetDefaultKey::IsLegacy(&is_legacy));
+    // set_dun only in the non-is_legacy case
+    DmTargetDefaultKey target(0, 4096, "AES-256-XTS", "abcdef0123456789", "/dev/loop0", 0,
+                              is_legacy, !is_legacy);
     ASSERT_EQ(target.name(), "default-key");
     ASSERT_TRUE(target.Valid());
-    ASSERT_EQ(target.GetParameterString(), "AES-256-XTS abcdef0123456789 /dev/loop0 0");
+    if (is_legacy) {
+        ASSERT_EQ(target.GetParameterString(), "AES-256-XTS abcdef0123456789 /dev/loop0 0");
+    } else {
+        ASSERT_EQ(target.GetParameterString(),
+                  "AES-256-XTS abcdef0123456789 0 /dev/loop0 0 3 allow_discards sector_size:4096 "
+                  "iv_large_sectors");
+    }
+}
+
+TEST(libdm, DeleteDeviceWithTimeout) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+
+    std::string path;
+    ASSERT_TRUE(dm.GetDmDevicePathByName("libdm-test-dm-linear", &path));
+    ASSERT_EQ(0, access(path.c_str(), F_OK));
+
+    ASSERT_TRUE(dm.DeleteDevice("libdm-test-dm-linear", 5s));
+    ASSERT_EQ(DmDeviceState::INVALID, dm.GetState("libdm-test-dm-linear"));
+    ASSERT_NE(0, access(path.c_str(), F_OK));
+    ASSERT_EQ(ENOENT, errno);
+}
+
+TEST(libdm, IsDmBlockDevice) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    ASSERT_TRUE(dm.IsDmBlockDevice(dev.path()));
+    ASSERT_FALSE(dm.IsDmBlockDevice(loop.device()));
+}
+
+TEST(libdm, GetDmDeviceNameByPath) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    // Not a dm device, GetDmDeviceNameByPath will return std::nullopt.
+    ASSERT_FALSE(dm.GetDmDeviceNameByPath(loop.device()));
+    auto name = dm.GetDmDeviceNameByPath(dev.path());
+    ASSERT_EQ("libdm-test-dm-linear", *name);
+}
+
+TEST(libdm, GetParentBlockDeviceByPath) {
+    unique_fd tmp(CreateTempFile("file_1", 4096));
+    ASSERT_GE(tmp, 0);
+    LoopDevice loop(tmp, 10s);
+    ASSERT_TRUE(loop.valid());
+    ASSERT_TRUE(android::base::StartsWith(loop.device(), "/dev/block"));
+
+    DmTable table;
+    ASSERT_TRUE(table.Emplace<DmTargetLinear>(0, 1, loop.device(), 0));
+    ASSERT_TRUE(table.valid());
+
+    TempDevice dev("libdm-test-dm-linear", table);
+    ASSERT_TRUE(dev.valid());
+
+    DeviceMapper& dm = DeviceMapper::Instance();
+    ASSERT_FALSE(dm.GetParentBlockDeviceByPath(loop.device()));
+    auto sub_block_device = dm.GetParentBlockDeviceByPath(dev.path());
+    ASSERT_EQ(loop.device(), *sub_block_device);
 }
diff --git a/fs_mgr/libdm/include/libdm/dm.h b/fs_mgr/libdm/include/libdm/dm.h
index e25ce7f..abe9c4c 100644
--- a/fs_mgr/libdm/include/libdm/dm.h
+++ b/fs_mgr/libdm/include/libdm/dm.h
@@ -90,6 +90,10 @@
     // Returns 'true' on success, false otherwise.
     bool DeleteDevice(const std::string& name);
     bool DeleteDeviceIfExists(const std::string& name);
+    // Removes a device mapper device with the given name and waits for |timeout_ms| milliseconds
+    // for the corresponding block device to be deleted.
+    bool DeleteDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms);
+    bool DeleteDeviceIfExists(const std::string& name, const std::chrono::milliseconds& timeout_ms);
 
     // Fetches and returns the complete state of the underlying device mapper
     // device with given name.
@@ -201,6 +205,8 @@
         TargetInfo() {}
         TargetInfo(const struct dm_target_spec& spec, const std::string& data)
             : spec(spec), data(data) {}
+
+        bool IsOverflowSnapshot() const;
     };
     bool GetTableStatus(const std::string& name, std::vector<TargetInfo>* table);
 
@@ -210,6 +216,19 @@
 
     static std::string GetTargetType(const struct dm_target_spec& spec);
 
+    // Returns true if given path is a path to a dm block device.
+    bool IsDmBlockDevice(const std::string& path);
+
+    // Returns name of a dm-device with the given path, or std::nulloptr if given path is not a
+    // dm-device.
+    std::optional<std::string> GetDmDeviceNameByPath(const std::string& path);
+
+    // Returns a parent block device of a dm device with the given path, or std::nullopt if:
+    //  * Given path doesn't correspond to a dm device.
+    //  * A dm device is based on top of more than one block devices.
+    //  * A failure occurred.
+    std::optional<std::string> GetParentBlockDeviceByPath(const std::string& path);
+
   private:
     // Maximum possible device mapper targets registered in the kernel.
     // This is only used to read the list of targets from kernel so we allocate
diff --git a/fs_mgr/libdm/include/libdm/dm_target.h b/fs_mgr/libdm/include/libdm/dm_target.h
index a78bc71..e3dd92b 100644
--- a/fs_mgr/libdm/include/libdm/dm_target.h
+++ b/fs_mgr/libdm/include/libdm/dm_target.h
@@ -281,23 +281,27 @@
   public:
     DmTargetDefaultKey(uint64_t start, uint64_t length, const std::string& cipher,
                        const std::string& key, const std::string& blockdev, uint64_t start_sector,
-                       bool set_dun = false)
+                       bool is_legacy, bool set_dun)
         : DmTarget(start, length),
           cipher_(cipher),
           key_(key),
           blockdev_(blockdev),
           start_sector_(start_sector),
+          is_legacy_(is_legacy),
           set_dun_(set_dun) {}
 
-    std::string name() const override { return "default-key"; }
-    bool Valid() const override { return true; }
+    std::string name() const override { return name_; }
+    bool Valid() const override;
     std::string GetParameterString() const override;
+    static bool IsLegacy(bool* result);
 
   private:
+    static const std::string name_;
     std::string cipher_;
     std::string key_;
     std::string blockdev_;
     uint64_t start_sector_;
+    bool is_legacy_;
     bool set_dun_;
 };
 
diff --git a/fs_mgr/libdm/utility.cpp b/fs_mgr/libdm/utility.cpp
index eccf2fb..f252565 100644
--- a/fs_mgr/libdm/utility.cpp
+++ b/fs_mgr/libdm/utility.cpp
@@ -52,5 +52,15 @@
     return WaitForCondition(condition, timeout_ms);
 }
 
+bool WaitForFileDeleted(const std::string& path, const std::chrono::milliseconds& timeout_ms) {
+    auto condition = [&]() -> WaitResult {
+        if (access(path.c_str(), F_OK) == 0 || errno != ENOENT) {
+            return WaitResult::Wait;
+        }
+        return WaitResult::Done;
+    };
+    return WaitForCondition(condition, timeout_ms);
+}
+
 }  // namespace dm
 }  // namespace android
diff --git a/fs_mgr/libdm/utility.h b/fs_mgr/libdm/utility.h
index f1dce9e..58fa96b 100644
--- a/fs_mgr/libdm/utility.h
+++ b/fs_mgr/libdm/utility.h
@@ -23,6 +23,7 @@
 enum class WaitResult { Wait, Done, Fail };
 
 bool WaitForFile(const std::string& path, const std::chrono::milliseconds& timeout_ms);
+bool WaitForFileDeleted(const std::string& path, const std::chrono::milliseconds& timeout_ms);
 bool WaitForCondition(const std::function<WaitResult()>& condition,
                       const std::chrono::milliseconds& timeout_ms);
 
diff --git a/fs_mgr/libfiemap/Android.bp b/fs_mgr/libfiemap/Android.bp
new file mode 100644
index 0000000..2fd463c
--- /dev/null
+++ b/fs_mgr/libfiemap/Android.bp
@@ -0,0 +1,137 @@
+//
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+cc_library_headers {
+    name: "libfiemap_headers",
+    recovery_available: true,
+    export_include_dirs: ["include"],
+}
+
+filegroup {
+    name: "libfiemap_srcs",
+    srcs: [
+        "fiemap_writer.cpp",
+        "fiemap_status.cpp",
+        "image_manager.cpp",
+        "metadata.cpp",
+        "split_fiemap_writer.cpp",
+        "utility.cpp",
+    ],
+}
+
+filegroup {
+    name: "libfiemap_binder_srcs",
+    srcs: [
+        "binder.cpp",
+    ],
+}
+
+cc_defaults {
+    name: "libfiemap_binder_defaults",
+    srcs: [":libfiemap_binder_srcs"],
+    whole_static_libs: [
+        "gsi_aidl_interface-cpp",
+        "libgsi",
+    ],
+    shared_libs: [
+        "libbinder",
+        "libutils",
+    ],
+}
+
+// Open up a passthrough IImageManager interface. Use libfiemap_binder whenever
+// possible. This should only be used when binder is not available.
+filegroup {
+    name: "libfiemap_passthrough_srcs",
+    srcs: [
+        "passthrough.cpp",
+    ],
+}
+
+cc_test {
+    name: "fiemap_writer_test",
+    static_libs: [
+        "libbase",
+        "libdm",
+        "libfs_mgr",
+        "liblog",
+    ],
+
+    data: [
+        "testdata/unaligned_file",
+        "testdata/file_4k",
+        "testdata/file_32k",
+    ],
+
+    srcs: [
+        "fiemap_writer_test.cpp",
+    ],
+
+    test_suites: ["vts-core", "device-tests"],
+    auto_gen_config: true,
+    test_min_api_level: 29,
+    require_root: true,
+}
+
+cc_test {
+    name: "fiemap_image_test",
+    static_libs: [
+        "libdm",
+        "libext4_utils",
+        "libfs_mgr",
+        "liblp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcrypto",
+        "libcrypto_utils",
+        "libcutils",
+        "liblog",
+    ],
+    srcs: [
+        "image_test.cpp",
+    ],
+    test_suites: ["device-tests"],
+    auto_gen_config: true,
+    require_root: true,
+}
+
+/* BUG(148874852) temporary test */
+cc_test {
+    name: "fiemap_image_test_presubmit",
+    cppflags: [
+        "-DSKIP_TEST_IN_PRESUBMIT",
+    ],
+    static_libs: [
+        "libdm",
+        "libext4_utils",
+        "libfs_mgr",
+        "liblp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcrypto",
+        "libcrypto_utils",
+        "libcutils",
+        "liblog",
+    ],
+    srcs: [
+        "image_test.cpp",
+    ],
+    test_suites: ["device-tests"],
+    auto_gen_config: true,
+    require_root: true,
+}
diff --git a/fs_mgr/libfiemap/README.md b/fs_mgr/libfiemap/README.md
new file mode 100644
index 0000000..62d610a
--- /dev/null
+++ b/fs_mgr/libfiemap/README.md
@@ -0,0 +1,75 @@
+libfiemap
+=============
+
+`libfiemap` is a library for creating block-devices that are backed by
+storage in read-write partitions. It exists primary for gsid. Generally, the
+library works by using `libfiemap_writer` to allocate large files within
+filesystem, and then tracks their extents.
+
+There are three main uses for `libfiemap`:
+ - Creating images that will act as block devices. For example, gsid needs to
+   create a `system_gsi` image to store Dynamic System Updates.
+ - Mapping the image as a block device while /data is mounted. This is fairly
+   tricky and is described in more detail below.
+ - Mapping the image as a block device during first-stage init. This is simple
+   because it uses the same logic from dynamic partitions.
+
+Image creation is done through `SplitFiemap`. Depending on the file system,
+a large image may have to be split into multiple files. On Ext4 the limit is
+16GiB and on FAT32 it's 4GiB. Images are saved into `/data/gsi/<name>/`
+where `<name>` is chosen by the process requesting the image.
+
+At the same time, a file called `/metadata/gsi/<name>/lp_metadata` is created.
+This is a super partition header that allows first-stage init to create dynamic
+partitions from the image files. It also tracks the canonical size of the image,
+since the file size may be larger due to alignment.
+
+Mapping
+-------
+
+It is easy to make block devices out of blocks on `/data` when it is not
+mounted, so first-stage init has no issues mapping dynamic partitions from
+images. After `/data` is mounted however, there are two problems:
+ - `/data` is encrypted.
+ - `/dev/block/by-name/data` may be marked as in-use.
+
+We break the problem down into three scenarios.
+
+### FDE and Metadata Encrypted Devices
+
+When FDE or metadata encryption is used, `/data` is not mounted from
+`/dev/block/by-name/data`. Instead, it is mounted from an intermediate
+`dm-crypt` or `dm-default-key` device. This means the underlying device is
+not marked in use, and we can create new dm-linear devices on top of it.
+
+On these devices, a block device for an image will consist of a single
+device-mapper device with a `dm-linear` table entry for each extent in the
+backing file.
+
+### Unencrypted and FBE-encrypted Devices
+
+When a device is unencrypted, or is encrypted with FBE but not metadata
+encryption, we instead use a loop device with `LOOP_SET_DIRECT_IO` enabled.
+Since `/data/gsi` has encryption disabled, this means the raw blocks will be
+unencrypted as well.
+
+### Split Images
+
+If an image was too large to store a single file on the underlying filesystem,
+on an FBE/unencrypted device we will have multiple loop devices. In this case,
+we create a device-mapper device as well. For each loop device it will have one
+`dm-linear` table entry spanning the length of the device.
+
+State Tracking
+--------------
+
+It's important that we know whether or not an image is currently in-use by a
+block device. It could be catastrophic to write to a dm-linear device if the
+underlying blocks are no longer owned by the original file. Thus, when mapping
+an image, we create a property called `gsid.mapped_image.<name>` and set it to
+the path of the block device.
+
+Additionally, we create a `/metadata/gsi/<subdir>/<name>.status` file. Each
+line in this file denotes a dependency on either a device-mapper node or a loop
+device. When deleting a block device, this file is used to release all
+resources.
diff --git a/fs_mgr/libfiemap/binder.cpp b/fs_mgr/libfiemap/binder.cpp
new file mode 100644
index 0000000..96c36ed
--- /dev/null
+++ b/fs_mgr/libfiemap/binder.cpp
@@ -0,0 +1,286 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#if !defined(__ANDROID_RECOVERY__)
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android/gsi/BnProgressCallback.h>
+#include <android/gsi/IGsiService.h>
+#include <android/gsi/IGsid.h>
+#include <binder/IServiceManager.h>
+#include <libfiemap/image_manager.h>
+#include <libgsi/libgsi.h>
+
+namespace android {
+namespace fiemap {
+
+using namespace android::gsi;
+using namespace std::chrono_literals;
+
+class ProgressCallback final : public BnProgressCallback {
+  public:
+    ProgressCallback(std::function<bool(uint64_t, uint64_t)>&& callback)
+        : callback_(std::move(callback)) {
+        CHECK(callback_);
+    }
+    android::binder::Status onProgress(int64_t current, int64_t total) {
+        if (callback_(static_cast<uint64_t>(current), static_cast<uint64_t>(total))) {
+            return android::binder::Status::ok();
+        }
+        return android::binder::Status::fromServiceSpecificError(UNKNOWN_ERROR,
+                                                                 "Progress callback failed");
+    }
+
+  private:
+    std::function<bool(uint64_t, uint64_t)> callback_;
+};
+
+class ImageManagerBinder final : public IImageManager {
+  public:
+    ImageManagerBinder(android::sp<IGsiService>&& service, android::sp<IImageService>&& manager);
+    FiemapStatus CreateBackingImage(const std::string& name, uint64_t size, int flags,
+                                    std::function<bool(uint64_t, uint64_t)>&& on_progress) override;
+    bool DeleteBackingImage(const std::string& name) override;
+    bool MapImageDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms,
+                        std::string* path) override;
+    bool UnmapImageDevice(const std::string& name) override;
+    bool BackingImageExists(const std::string& name) override;
+    bool IsImageMapped(const std::string& name) override;
+    bool MapImageWithDeviceMapper(const IPartitionOpener& opener, const std::string& name,
+                                  std::string* dev) override;
+    FiemapStatus ZeroFillNewImage(const std::string& name, uint64_t bytes) override;
+    bool RemoveAllImages() override;
+    bool DisableImage(const std::string& name) override;
+    bool RemoveDisabledImages() override;
+    bool GetMappedImageDevice(const std::string& name, std::string* device) override;
+    bool MapAllImages(const std::function<bool(std::set<std::string>)>& init) override;
+
+    std::vector<std::string> GetAllBackingImages() override;
+
+  private:
+    android::sp<IGsiService> service_;
+    android::sp<IImageService> manager_;
+};
+
+static FiemapStatus ToFiemapStatus(const char* func, const binder::Status& status) {
+    if (!status.isOk()) {
+        LOG(ERROR) << func << " binder returned: " << status.toString8().string();
+        if (status.serviceSpecificErrorCode() != 0) {
+            return FiemapStatus::FromErrorCode(status.serviceSpecificErrorCode());
+        } else {
+            return FiemapStatus::Error();
+        }
+    }
+    return FiemapStatus::Ok();
+}
+
+ImageManagerBinder::ImageManagerBinder(android::sp<IGsiService>&& service,
+                                       android::sp<IImageService>&& manager)
+    : service_(std::move(service)), manager_(std::move(manager)) {}
+
+FiemapStatus ImageManagerBinder::CreateBackingImage(
+        const std::string& name, uint64_t size, int flags,
+        std::function<bool(uint64_t, uint64_t)>&& on_progress) {
+    sp<IProgressCallback> callback = nullptr;
+    if (on_progress) {
+        callback = new ProgressCallback(std::move(on_progress));
+    }
+    auto status = manager_->createBackingImage(name, size, flags, callback);
+    return ToFiemapStatus(__PRETTY_FUNCTION__, status);
+}
+
+bool ImageManagerBinder::DeleteBackingImage(const std::string& name) {
+    auto status = manager_->deleteBackingImage(name);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return true;
+}
+
+bool ImageManagerBinder::MapImageDevice(const std::string& name,
+                                        const std::chrono::milliseconds& timeout_ms,
+                                        std::string* path) {
+    int32_t timeout_ms_count =
+            static_cast<int32_t>(std::clamp<typename std::chrono::milliseconds::rep>(
+                    timeout_ms.count(), INT32_MIN, INT32_MAX));
+    MappedImage map;
+    auto status = manager_->mapImageDevice(name, timeout_ms_count, &map);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    *path = map.path;
+    return true;
+}
+
+bool ImageManagerBinder::UnmapImageDevice(const std::string& name) {
+    auto status = manager_->unmapImageDevice(name);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return true;
+}
+
+bool ImageManagerBinder::BackingImageExists(const std::string& name) {
+    bool retval;
+    auto status = manager_->backingImageExists(name, &retval);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return retval;
+}
+
+bool ImageManagerBinder::IsImageMapped(const std::string& name) {
+    bool retval;
+    auto status = manager_->isImageMapped(name, &retval);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return retval;
+}
+
+bool ImageManagerBinder::MapImageWithDeviceMapper(const IPartitionOpener& opener,
+                                                  const std::string& name, std::string* dev) {
+    (void)opener;
+    (void)name;
+    (void)dev;
+    LOG(ERROR) << "MapImageWithDeviceMapper is not available over binder.";
+    return false;
+}
+
+std::vector<std::string> ImageManagerBinder::GetAllBackingImages() {
+    std::vector<std::string> retval;
+    auto status = manager_->getAllBackingImages(&retval);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+    }
+    return retval;
+}
+
+FiemapStatus ImageManagerBinder::ZeroFillNewImage(const std::string& name, uint64_t bytes) {
+    auto status = manager_->zeroFillNewImage(name, bytes);
+    return ToFiemapStatus(__PRETTY_FUNCTION__, status);
+}
+
+bool ImageManagerBinder::RemoveAllImages() {
+    auto status = manager_->removeAllImages();
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return true;
+}
+
+bool ImageManagerBinder::DisableImage(const std::string&) {
+    LOG(ERROR) << __PRETTY_FUNCTION__ << " is not available over binder";
+    return false;
+}
+
+bool ImageManagerBinder::RemoveDisabledImages() {
+    auto status = manager_->removeDisabledImages();
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return true;
+}
+
+bool ImageManagerBinder::GetMappedImageDevice(const std::string& name, std::string* device) {
+    auto status = manager_->getMappedImageDevice(name, device);
+    if (!status.isOk()) {
+        LOG(ERROR) << __PRETTY_FUNCTION__
+                   << " binder returned: " << status.exceptionMessage().string();
+        return false;
+    }
+    return !device->empty();
+}
+
+bool ImageManagerBinder::MapAllImages(const std::function<bool(std::set<std::string>)>&) {
+    LOG(ERROR) << __PRETTY_FUNCTION__ << " not available over binder";
+    return false;
+}
+
+static android::sp<IGsid> AcquireIGsid(const std::chrono::milliseconds& timeout_ms) {
+    if (android::base::GetProperty("init.svc.gsid", "") != "running") {
+        if (!android::base::SetProperty("ctl.start", "gsid") ||
+            !android::base::WaitForProperty("init.svc.gsid", "running", timeout_ms)) {
+            LOG(ERROR) << "Could not start the gsid service";
+            return nullptr;
+        }
+        // Sleep for 250ms to give the service time to register.
+        usleep(250 * 1000);
+    }
+    auto sm = android::defaultServiceManager();
+    auto name = android::String16(kGsiServiceName);
+    auto service = sm->checkService(name);
+    return android::interface_cast<IGsid>(service);
+}
+
+static android::sp<IGsid> GetGsiService(const std::chrono::milliseconds& timeout_ms) {
+    auto start_time = std::chrono::steady_clock::now();
+
+    std::chrono::milliseconds elapsed = std::chrono::milliseconds::zero();
+    do {
+        if (auto gsid = AcquireIGsid(timeout_ms - elapsed); gsid != nullptr) {
+            return gsid;
+        }
+        auto now = std::chrono::steady_clock::now();
+        elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(now - start_time);
+    } while (elapsed <= timeout_ms);
+
+    LOG(ERROR) << "Timed out trying to acquire IGsid interface";
+    return nullptr;
+}
+
+std::unique_ptr<IImageManager> IImageManager::Open(const std::string& dir,
+                                                   const std::chrono::milliseconds& timeout_ms) {
+    auto gsid = GetGsiService(timeout_ms);
+    if (!gsid) {
+        return nullptr;
+    }
+
+    android::sp<IGsiService> service;
+    auto status = gsid->getClient(&service);
+    if (!status.isOk() || !service) {
+        LOG(ERROR) << "Could not acquire IGsiService";
+        return nullptr;
+    }
+
+    android::sp<IImageService> manager;
+    status = service->openImageService(dir, &manager);
+    if (!status.isOk() || !manager) {
+        LOG(ERROR) << "Could not acquire IImageManager: " << status.exceptionMessage().string();
+        return nullptr;
+    }
+    return std::make_unique<ImageManagerBinder>(std::move(service), std::move(manager));
+}
+
+}  // namespace fiemap
+}  // namespace android
+
+#endif  // __ANDROID_RECOVERY__
diff --git a/fs_mgr/libfiemap/fiemap_status.cpp b/fs_mgr/libfiemap/fiemap_status.cpp
new file mode 100644
index 0000000..92ac935
--- /dev/null
+++ b/fs_mgr/libfiemap/fiemap_status.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <libfiemap/fiemap_status.h>
+
+namespace android::fiemap {
+
+// FiemapStatus -> string
+std::string FiemapStatus::string() const {
+    if (error_code() == ErrorCode::ERROR) {
+        return "Error";
+    }
+    return strerror(-static_cast<int>(error_code()));
+}
+
+// -errno -> known ErrorCode
+// unknown ErrorCode -> known ErrorCode
+FiemapStatus::ErrorCode FiemapStatus::CastErrorCode(int error_code) {
+    switch (error_code) {
+        case static_cast<int32_t>(ErrorCode::SUCCESS):
+        case static_cast<int32_t>(ErrorCode::NO_SPACE):
+            return static_cast<ErrorCode>(error_code);
+        case static_cast<int32_t>(ErrorCode::ERROR):
+        default:
+            return ErrorCode::ERROR;
+    }
+}
+
+}  // namespace android::fiemap
diff --git a/fs_mgr/libfiemap/fiemap_writer.cpp b/fs_mgr/libfiemap/fiemap_writer.cpp
new file mode 100644
index 0000000..4dd4bcc
--- /dev/null
+++ b/fs_mgr/libfiemap/fiemap_writer.cpp
@@ -0,0 +1,807 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <libfiemap/fiemap_writer.h>
+
+#include <dirent.h>
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/vfs.h>
+#include <unistd.h>
+
+#include <limits>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+#include <libdm/dm.h>
+#include "utility.h"
+
+namespace android {
+namespace fiemap {
+
+using namespace android::dm;
+
+// We cap the maximum number of extents as a sanity measure.
+static constexpr uint32_t kMaxExtents = 50000;
+
+// TODO: Fallback to using fibmap if FIEMAP_EXTENT_MERGED is set.
+static constexpr const uint32_t kUnsupportedExtentFlags =
+        FIEMAP_EXTENT_UNKNOWN | FIEMAP_EXTENT_UNWRITTEN | FIEMAP_EXTENT_DELALLOC |
+        FIEMAP_EXTENT_NOT_ALIGNED | FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_DATA_TAIL |
+        FIEMAP_EXTENT_UNWRITTEN | FIEMAP_EXTENT_SHARED | FIEMAP_EXTENT_MERGED;
+
+// Large file support must be enabled.
+static_assert(sizeof(off_t) == sizeof(uint64_t));
+
+static inline void cleanup(const std::string& file_path, bool created) {
+    if (created) {
+        unlink(file_path.c_str());
+    }
+}
+
+static bool ValidateDmTarget(const DeviceMapper::TargetInfo& target) {
+    const auto& entry = target.spec;
+    if (entry.sector_start != 0) {
+        LOG(INFO) << "Stopping at target with non-zero starting sector";
+        return false;
+    }
+
+    auto target_type = DeviceMapper::GetTargetType(entry);
+    if (target_type == "bow" || target_type == "default-key" || target_type == "crypt") {
+        return true;
+    }
+    if (target_type == "linear") {
+        auto pieces = android::base::Split(target.data, " ");
+        if (pieces[1] != "0") {
+            LOG(INFO) << "Stopping at complex linear target with non-zero starting sector: "
+                      << pieces[1];
+            return false;
+        }
+        return true;
+    }
+
+    LOG(INFO) << "Stopping at complex target type " << target_type;
+    return false;
+}
+
+static bool DeviceMapperStackPop(const std::string& bdev, std::string* bdev_raw) {
+    *bdev_raw = bdev;
+
+    if (!::android::base::StartsWith(bdev, "dm-")) {
+        // We are at the bottom of the device mapper stack.
+        return true;
+    }
+
+    // Get the device name.
+    auto dm_name_file = "/sys/block/" + bdev + "/dm/name";
+    std::string dm_name;
+    if (!android::base::ReadFileToString(dm_name_file, &dm_name)) {
+        PLOG(ERROR) << "Could not read file: " << dm_name_file;
+        return false;
+    }
+    dm_name = android::base::Trim(dm_name);
+
+    auto& dm = DeviceMapper::Instance();
+    std::vector<DeviceMapper::TargetInfo> table;
+    if (!dm.GetTableInfo(dm_name, &table)) {
+        LOG(ERROR) << "Could not read device-mapper table for " << dm_name << " at " << bdev;
+        return false;
+    }
+
+    // The purpose of libfiemap is to provide an extent-based view into
+    // a file. This is difficult if devices are not layered in a 1:1 manner;
+    // we would have to translate and break up extents based on the actual
+    // block mapping. Since this is too complex, we simply stop processing
+    // the device-mapper stack if we encounter a complex case.
+    //
+    // It is up to the caller to decide whether stopping at a virtual block
+    // device is allowable. In most cases it is not, because we want either
+    // "userdata" or an external volume. It is useful for tests however.
+    // Callers can check by comparing the device number to that of userdata,
+    // or by checking whether is a device-mapper node.
+    if (table.size() > 1) {
+        LOG(INFO) << "Stopping at complex table for " << dm_name << " at " << bdev;
+        return true;
+    }
+    if (!ValidateDmTarget(table[0])) {
+        return true;
+    }
+
+    auto dm_leaf_dir = "/sys/block/" + bdev + "/slaves";
+    auto d = std::unique_ptr<DIR, decltype(&closedir)>(opendir(dm_leaf_dir.c_str()), closedir);
+    if (d == nullptr) {
+        PLOG(ERROR) << "Failed to open: " << dm_leaf_dir;
+        return false;
+    }
+
+    struct dirent* de;
+    uint32_t num_leaves = 0;
+    std::string bdev_next = "";
+    while ((de = readdir(d.get())) != nullptr) {
+        if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) {
+            continue;
+        }
+
+        // We set the first name we find here
+        if (bdev_next.empty()) {
+            bdev_next = de->d_name;
+        }
+        num_leaves++;
+    }
+
+    // if we have more than one leaves, we return immediately. We can't continue to create the
+    // file since we don't know how to write it out using fiemap, so it will be readable via the
+    // underlying block devices later. The reader will also have to construct the same device mapper
+    // target in order read the file out.
+    if (num_leaves > 1) {
+        LOG(ERROR) << "Found " << num_leaves << " leaf block devices under device mapper device "
+                   << bdev;
+        return false;
+    }
+
+    // recursively call with the block device we found in order to pop the device mapper stack.
+    return DeviceMapperStackPop(bdev_next, bdev_raw);
+}
+
+bool FiemapWriter::GetBlockDeviceForFile(const std::string& file_path, std::string* bdev_path,
+                                         bool* uses_dm) {
+    struct stat sb;
+    if (stat(file_path.c_str(), &sb)) {
+        PLOG(ERROR) << "Failed to get stat for: " << file_path;
+        return false;
+    }
+
+    std::string bdev;
+    if (!BlockDeviceToName(major(sb.st_dev), minor(sb.st_dev), &bdev)) {
+        LOG(ERROR) << "Failed to get block device name for " << major(sb.st_dev) << ":"
+                   << minor(sb.st_dev);
+        return false;
+    }
+
+    std::string bdev_raw;
+    if (!DeviceMapperStackPop(bdev, &bdev_raw)) {
+        LOG(ERROR) << "Failed to get the bottom of the device mapper stack for device: " << bdev;
+        return false;
+    }
+
+    if (uses_dm) {
+        *uses_dm = (bdev_raw != bdev);
+    }
+
+    LOG(DEBUG) << "Popped device (" << bdev_raw << ") from device mapper stack starting with ("
+               << bdev << ")";
+
+    *bdev_path = ::android::base::StringPrintf("/dev/block/%s", bdev_raw.c_str());
+
+    // Make sure we are talking to a block device before calling it a success.
+    if (stat(bdev_path->c_str(), &sb)) {
+        PLOG(ERROR) << "Failed to get stat for block device: " << *bdev_path;
+        return false;
+    }
+
+    if ((sb.st_mode & S_IFMT) != S_IFBLK) {
+        PLOG(ERROR) << "File: " << *bdev_path << " is not a block device";
+        return false;
+    }
+
+    return true;
+}
+
+static bool GetBlockDeviceSize(int bdev_fd, const std::string& bdev_path, uint64_t* bdev_size) {
+    uint64_t size_in_bytes = 0;
+    if (ioctl(bdev_fd, BLKGETSIZE64, &size_in_bytes)) {
+        PLOG(ERROR) << "Failed to get total size for: " << bdev_path;
+        return false;
+    }
+
+    *bdev_size = size_in_bytes;
+
+    return true;
+}
+
+static uint64_t GetFileSize(const std::string& file_path) {
+    struct stat sb;
+    if (stat(file_path.c_str(), &sb)) {
+        PLOG(ERROR) << "Failed to get size for file: " << file_path;
+        return 0;
+    }
+
+    return sb.st_size;
+}
+
+static bool PerformFileChecks(const std::string& file_path, uint64_t* blocksz, uint32_t* fs_type) {
+    struct statfs64 sfs;
+    if (statfs64(file_path.c_str(), &sfs)) {
+        PLOG(ERROR) << "Failed to read file system status at: " << file_path;
+        return false;
+    }
+
+    if (!sfs.f_bsize) {
+        LOG(ERROR) << "Unsupported block size: " << sfs.f_bsize;
+        return false;
+    }
+
+    // Check if the filesystem is of supported types.
+    // Only ext4, f2fs, and vfat are tested and supported.
+    switch (sfs.f_type) {
+        case EXT4_SUPER_MAGIC:
+        case F2FS_SUPER_MAGIC:
+        case MSDOS_SUPER_MAGIC:
+            break;
+        default:
+            LOG(ERROR) << "Unsupported file system type: 0x" << std::hex << sfs.f_type;
+            return false;
+    }
+
+    *blocksz = sfs.f_bsize;
+    *fs_type = sfs.f_type;
+    return true;
+}
+
+static FiemapStatus FallocateFallback(int file_fd, uint64_t block_size, uint64_t file_size,
+                                      const std::string& file_path,
+                                      const std::function<bool(uint64_t, uint64_t)>& on_progress) {
+    // Even though this is much faster than writing zeroes, it is still slow
+    // enough that we need to fire the progress callback periodically. To
+    // easily achieve this, we seek in chunks. We use 1000 chunks since
+    // normally we only fire the callback on 1/1000th increments.
+    uint64_t bytes_per_chunk = std::max(file_size / 1000, block_size);
+
+    // Seek just to the end of each chunk and write a single byte, causing
+    // the filesystem to allocate blocks.
+    off_t cursor = 0;
+    off_t end = static_cast<off_t>(file_size);
+    while (cursor < end) {
+        cursor = std::min(static_cast<off_t>(cursor + bytes_per_chunk), end);
+        auto rv = TEMP_FAILURE_RETRY(lseek(file_fd, cursor - 1, SEEK_SET));
+        if (rv < 0) {
+            PLOG(ERROR) << "Failed to lseek " << file_path;
+            return FiemapStatus::FromErrno(errno);
+        }
+        if (rv != cursor - 1) {
+            LOG(ERROR) << "Seek returned wrong offset " << rv << " for file " << file_path;
+            return FiemapStatus::Error();
+        }
+        char buffer[] = {0};
+        if (!android::base::WriteFully(file_fd, buffer, 1)) {
+            PLOG(ERROR) << "Write failed: " << file_path;
+            return FiemapStatus::FromErrno(errno);
+        }
+        if (on_progress && !on_progress(cursor, file_size)) {
+            return FiemapStatus::Error();
+        }
+    }
+    return FiemapStatus::Ok();
+}
+
+// F2FS-specific ioctl
+// It requires the below kernel commit merged in v4.16-rc1.
+//   1ad71a27124c ("f2fs: add an ioctl to disable GC for specific file")
+// In android-4.4,
+//   56ee1e817908 ("f2fs: updates on v4.16-rc1")
+// In android-4.9,
+//   2f17e34672a8 ("f2fs: updates on v4.16-rc1")
+// In android-4.14,
+//   ce767d9a55bc ("f2fs: updates on v4.16-rc1")
+#ifndef F2FS_IOC_SET_PIN_FILE
+#ifndef F2FS_IOCTL_MAGIC
+#define F2FS_IOCTL_MAGIC 0xf5
+#endif
+#define F2FS_IOC_GET_PIN_FILE _IOR(F2FS_IOCTL_MAGIC, 14, __u32)
+#define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
+#endif
+
+static bool IsFilePinned(int file_fd, const std::string& file_path, uint32_t fs_type) {
+    if (fs_type != F2FS_SUPER_MAGIC) {
+        // No pinning necessary for ext4 or vfat. The blocks, once allocated,
+        // are expected to be fixed.
+        return true;
+    }
+
+    // f2fs: export FS_NOCOW_FL flag to user
+    uint32_t flags;
+    int error = ioctl(file_fd, FS_IOC_GETFLAGS, &flags);
+    if (error < 0) {
+        if ((errno == ENOTTY) || (errno == ENOTSUP)) {
+            PLOG(ERROR) << "Failed to get flags, not supported by kernel: " << file_path;
+        } else {
+            PLOG(ERROR) << "Failed to get flags: " << file_path;
+        }
+        return false;
+    }
+    if (!(flags & FS_NOCOW_FL)) {
+        return false;
+    }
+
+    // F2FS_IOC_GET_PIN_FILE returns the number of blocks moved.
+    uint32_t moved_blocks_nr;
+    error = ioctl(file_fd, F2FS_IOC_GET_PIN_FILE, &moved_blocks_nr);
+    if (error < 0) {
+        if ((errno == ENOTTY) || (errno == ENOTSUP)) {
+            PLOG(ERROR) << "Failed to get file pin status, not supported by kernel: " << file_path;
+        } else {
+            PLOG(ERROR) << "Failed to get file pin status: " << file_path;
+        }
+        return false;
+    }
+
+    if (moved_blocks_nr) {
+        LOG(WARNING) << moved_blocks_nr << " blocks moved in file " << file_path;
+    }
+    return moved_blocks_nr == 0;
+}
+
+static bool PinFile(int file_fd, const std::string& file_path, uint32_t fs_type) {
+    if (IsFilePinned(file_fd, file_path, fs_type)) {
+        return true;
+    }
+    if (fs_type != F2FS_SUPER_MAGIC) {
+        // No pinning necessary for ext4/msdos. The blocks, once allocated, are
+        // expected to be fixed.
+        return true;
+    }
+
+    uint32_t pin_status = 1;
+    int error = ioctl(file_fd, F2FS_IOC_SET_PIN_FILE, &pin_status);
+    if (error < 0) {
+        if ((errno == ENOTTY) || (errno == ENOTSUP)) {
+            PLOG(ERROR) << "Failed to pin file, not supported by kernel: " << file_path;
+        } else {
+            PLOG(ERROR) << "Failed to pin file: " << file_path;
+        }
+        return false;
+    }
+
+    return true;
+}
+
+// write zeroes in 'blocksz' byte increments until we reach file_size to make sure the data
+// blocks are actually written to by the file system and thus getting rid of the holes in the
+// file.
+static FiemapStatus WriteZeroes(int file_fd, const std::string& file_path, size_t blocksz,
+                                uint64_t file_size,
+                                const std::function<bool(uint64_t, uint64_t)>& on_progress) {
+    auto buffer = std::unique_ptr<void, decltype(&free)>(calloc(1, blocksz), free);
+    if (buffer == nullptr) {
+        LOG(ERROR) << "failed to allocate memory for writing file";
+        return FiemapStatus::Error();
+    }
+
+    off64_t offset = lseek64(file_fd, 0, SEEK_SET);
+    if (offset < 0) {
+        PLOG(ERROR) << "Failed to seek at the beginning of : " << file_path;
+        return FiemapStatus::FromErrno(errno);
+    }
+
+    int permille = -1;
+    while (offset < file_size) {
+        if (!::android::base::WriteFully(file_fd, buffer.get(), blocksz)) {
+            PLOG(ERROR) << "Failed to write" << blocksz << " bytes at offset" << offset
+                        << " in file " << file_path;
+            return FiemapStatus::FromErrno(errno);
+        }
+
+        offset += blocksz;
+
+        // Don't invoke the callback every iteration - wait until a significant
+        // chunk (here, 1/1000th) of the data has been processed.
+        int new_permille = (static_cast<uint64_t>(offset) * 1000) / file_size;
+        if (new_permille != permille && static_cast<uint64_t>(offset) != file_size) {
+            if (on_progress && !on_progress(offset, file_size)) {
+                return FiemapStatus::Error();
+            }
+            permille = new_permille;
+        }
+    }
+
+    if (lseek64(file_fd, 0, SEEK_SET) < 0) {
+        PLOG(ERROR) << "Failed to reset offset at the beginning of : " << file_path;
+        return FiemapStatus::FromErrno(errno);
+    }
+    return FiemapStatus::Ok();
+}
+
+// Reserve space for the file on the file system and write it out to make sure the extents
+// don't come back unwritten. Return from this function with the kernel file offset set to 0.
+// If the filesystem is f2fs, then we also PIN the file on disk to make sure the blocks
+// aren't moved around.
+static FiemapStatus AllocateFile(int file_fd, const std::string& file_path, uint64_t blocksz,
+                                 uint64_t file_size, unsigned int fs_type,
+                                 std::function<bool(uint64_t, uint64_t)> on_progress) {
+    bool need_explicit_writes = true;
+    switch (fs_type) {
+        case EXT4_SUPER_MAGIC:
+            break;
+        case F2FS_SUPER_MAGIC: {
+            bool supported;
+            if (!F2fsPinBeforeAllocate(file_fd, &supported)) {
+                return FiemapStatus::Error();
+            }
+            if (supported) {
+                if (!PinFile(file_fd, file_path, fs_type)) {
+                    return FiemapStatus::Error();
+                }
+                need_explicit_writes = false;
+            }
+            break;
+        }
+        case MSDOS_SUPER_MAGIC:
+            // fallocate() is not supported, and not needed, since VFAT does not support holes.
+            // Instead we can perform a much faster allocation.
+            return FallocateFallback(file_fd, blocksz, file_size, file_path, on_progress);
+        default:
+            LOG(ERROR) << "Missing fallocate() support for file system " << fs_type;
+            return FiemapStatus::Error();
+    }
+
+    if (fallocate(file_fd, 0, 0, file_size)) {
+        PLOG(ERROR) << "Failed to allocate space for file: " << file_path << " size: " << file_size;
+        return FiemapStatus::FromErrno(errno);
+    }
+
+    if (need_explicit_writes) {
+        auto status = WriteZeroes(file_fd, file_path, blocksz, file_size, on_progress);
+        if (!status.is_ok()) {
+            return status;
+        }
+    }
+
+    // flush all writes here ..
+    if (fsync(file_fd)) {
+        PLOG(ERROR) << "Failed to synchronize written file:" << file_path;
+        return FiemapStatus::FromErrno(errno);
+    }
+
+    // Send one last progress notification.
+    if (on_progress && !on_progress(file_size, file_size)) {
+        return FiemapStatus::Error();
+    }
+    return FiemapStatus::Ok();
+}
+
+bool FiemapWriter::HasPinnedExtents(const std::string& file_path) {
+    android::base::unique_fd fd(open(file_path.c_str(), O_NOFOLLOW | O_CLOEXEC | O_RDONLY));
+    if (fd < 0) {
+        PLOG(ERROR) << "open: " << file_path;
+        return false;
+    }
+
+    struct statfs64 sfs;
+    if (fstatfs64(fd, &sfs)) {
+        PLOG(ERROR) << "fstatfs64: " << file_path;
+        return false;
+    }
+    return IsFilePinned(fd, file_path, sfs.f_type);
+}
+
+static bool CountFiemapExtents(int file_fd, const std::string& file_path, uint32_t* num_extents) {
+    struct fiemap fiemap = {};
+    fiemap.fm_start = 0;
+    fiemap.fm_length = UINT64_MAX;
+    fiemap.fm_flags = FIEMAP_FLAG_SYNC;
+    fiemap.fm_extent_count = 0;
+
+    if (ioctl(file_fd, FS_IOC_FIEMAP, &fiemap)) {
+        PLOG(ERROR) << "Failed to get FIEMAP from the kernel for file: " << file_path;
+        return false;
+    }
+
+    if (num_extents) {
+        *num_extents = fiemap.fm_mapped_extents;
+    }
+    return true;
+}
+
+static bool IsValidExtent(const fiemap_extent* extent, std::string_view file_path) {
+    if (extent->fe_flags & kUnsupportedExtentFlags) {
+        LOG(ERROR) << "Extent at location " << extent->fe_logical << " of file " << file_path
+                   << " has unsupported flags";
+        return false;
+    }
+    return true;
+}
+
+static bool IsLastExtent(const fiemap_extent* extent) {
+    return !!(extent->fe_flags & FIEMAP_EXTENT_LAST);
+}
+
+static bool FiemapToExtents(struct fiemap* fiemap, std::vector<struct fiemap_extent>* extents,
+                            uint32_t num_extents, std::string_view file_path) {
+    if (num_extents == 0) return false;
+
+    const struct fiemap_extent* last_extent = &fiemap->fm_extents[num_extents - 1];
+    if (!IsLastExtent(last_extent)) {
+        LOG(ERROR) << "FIEMAP did not return a final extent for file: " << file_path;
+        return false;
+    }
+
+    // Iterate through each extent, read and make sure its valid before adding it to the vector
+    // merging contiguous extents.
+    fiemap_extent* prev = &fiemap->fm_extents[0];
+    if (!IsValidExtent(prev, file_path)) return false;
+
+    for (uint32_t i = 1; i < num_extents; i++) {
+        fiemap_extent* next = &fiemap->fm_extents[i];
+
+        // Make sure extents are returned in order
+        if (next != last_extent && IsLastExtent(next)) {
+            LOG(ERROR) << "Extents are being received out-of-order";
+            return false;
+        }
+
+        // Check if extent's flags are valid
+        if (!IsValidExtent(next, file_path)) return false;
+
+        // Check if the current extent is contiguous with the previous one.
+        // An extent can be combined with its predecessor only if:
+        //  1. There is no physical space between the previous and the current
+        //  extent, and
+        //  2. The physical distance between the previous and current extent
+        //  corresponds to their logical distance (contiguous mapping).
+        if (prev->fe_physical + prev->fe_length == next->fe_physical &&
+            next->fe_physical - prev->fe_physical == next->fe_logical - prev->fe_logical) {
+            prev->fe_length += next->fe_length;
+        } else {
+            extents->emplace_back(*prev);
+            prev = next;
+        }
+    }
+    extents->emplace_back(*prev);
+
+    return true;
+}
+
+static bool ReadFiemap(int file_fd, const std::string& file_path,
+                       std::vector<struct fiemap_extent>* extents) {
+    uint32_t num_extents;
+    if (!CountFiemapExtents(file_fd, file_path, &num_extents)) {
+        return false;
+    }
+    if (num_extents == 0) {
+        LOG(ERROR) << "File " << file_path << " has zero extents";
+        return false;
+    }
+    if (num_extents > kMaxExtents) {
+        LOG(ERROR) << "File has " << num_extents << ", maximum is " << kMaxExtents << ": "
+                   << file_path;
+        return false;
+    }
+
+    uint64_t fiemap_size = sizeof(struct fiemap) + num_extents * sizeof(struct fiemap_extent);
+    auto buffer = std::unique_ptr<void, decltype(&free)>(calloc(1, fiemap_size), free);
+    if (buffer == nullptr) {
+        LOG(ERROR) << "Failed to allocate memory for fiemap";
+        return false;
+    }
+
+    struct fiemap* fiemap = reinterpret_cast<struct fiemap*>(buffer.get());
+    fiemap->fm_start = 0;
+    fiemap->fm_length = UINT64_MAX;
+    // make sure file is synced to disk before we read the fiemap
+    fiemap->fm_flags = FIEMAP_FLAG_SYNC;
+    fiemap->fm_extent_count = num_extents;
+
+    if (ioctl(file_fd, FS_IOC_FIEMAP, fiemap)) {
+        PLOG(ERROR) << "Failed to get FIEMAP from the kernel for file: " << file_path;
+        return false;
+    }
+    if (fiemap->fm_mapped_extents != num_extents) {
+        LOG(ERROR) << "FIEMAP returned unexpected extent count (" << num_extents
+                   << " expected, got " << fiemap->fm_mapped_extents << ") for file: " << file_path;
+        return false;
+    }
+
+    return FiemapToExtents(fiemap, extents, num_extents, file_path);
+}
+
+static bool ReadFibmap(int file_fd, const std::string& file_path,
+                       std::vector<struct fiemap_extent>* extents) {
+    struct stat s;
+    if (fstat(file_fd, &s)) {
+        PLOG(ERROR) << "Failed to stat " << file_path;
+        return false;
+    }
+
+    unsigned int blksize;
+    if (ioctl(file_fd, FIGETBSZ, &blksize) < 0) {
+        PLOG(ERROR) << "Failed to get FIGETBSZ for " << file_path;
+        return false;
+    }
+    if (!blksize) {
+        LOG(ERROR) << "Invalid filesystem block size: " << blksize;
+        return false;
+    }
+
+    uint64_t num_blocks = (s.st_size + blksize - 1) / blksize;
+    if (num_blocks > std::numeric_limits<uint32_t>::max()) {
+        LOG(ERROR) << "Too many blocks for FIBMAP (" << num_blocks << ")";
+        return false;
+    }
+
+    for (uint32_t last_block, block_number = 0; block_number < num_blocks; block_number++) {
+        uint32_t block = block_number;
+        if (ioctl(file_fd, FIBMAP, &block)) {
+            PLOG(ERROR) << "Failed to get FIBMAP for file " << file_path;
+            return false;
+        }
+        if (!block) {
+            LOG(ERROR) << "Logical block " << block_number << " is a hole, which is not supported";
+            return false;
+        }
+
+        if (!extents->empty() && block == last_block + 1) {
+            extents->back().fe_length += blksize;
+        } else {
+            extents->push_back(fiemap_extent{.fe_logical = block_number,
+                                             .fe_physical = static_cast<uint64_t>(block) * blksize,
+                                             .fe_length = static_cast<uint64_t>(blksize),
+                                             .fe_flags = 0});
+            if (extents->size() > kMaxExtents) {
+                LOG(ERROR) << "File has more than " << kMaxExtents << "extents: " << file_path;
+                return false;
+            }
+        }
+        last_block = block;
+    }
+    return true;
+}
+
+FiemapUniquePtr FiemapWriter::Open(const std::string& file_path, uint64_t file_size, bool create,
+                                   std::function<bool(uint64_t, uint64_t)> progress) {
+    FiemapUniquePtr ret;
+    if (!Open(file_path, file_size, &ret, create, progress).is_ok()) {
+        return nullptr;
+    }
+    return ret;
+}
+
+FiemapStatus FiemapWriter::Open(const std::string& file_path, uint64_t file_size,
+                                FiemapUniquePtr* out, bool create,
+                                std::function<bool(uint64_t, uint64_t)> progress) {
+    out->reset();
+
+    // if 'create' is false, open an existing file and do not truncate.
+    int open_flags = O_RDWR | O_CLOEXEC;
+    if (create) {
+        if (access(file_path.c_str(), F_OK) == 0) {
+            LOG(WARNING) << "File " << file_path << " already exists, truncating";
+        }
+        open_flags |= O_CREAT | O_TRUNC;
+    }
+    ::android::base::unique_fd file_fd(
+            TEMP_FAILURE_RETRY(open(file_path.c_str(), open_flags, S_IRUSR | S_IWUSR)));
+    if (file_fd < 0) {
+        PLOG(ERROR) << "Failed to create file at: " << file_path;
+        return FiemapStatus::FromErrno(errno);
+    }
+
+    std::string abs_path;
+    if (!::android::base::Realpath(file_path, &abs_path)) {
+        int saved_errno = errno;
+        PLOG(ERROR) << "Invalid file path: " << file_path;
+        cleanup(file_path, create);
+        return FiemapStatus::FromErrno(saved_errno);
+    }
+
+    std::string bdev_path;
+    if (!GetBlockDeviceForFile(abs_path, &bdev_path)) {
+        LOG(ERROR) << "Failed to get block dev path for file: " << file_path;
+        cleanup(abs_path, create);
+        return FiemapStatus::Error();
+    }
+
+    ::android::base::unique_fd bdev_fd(
+            TEMP_FAILURE_RETRY(open(bdev_path.c_str(), O_RDONLY | O_CLOEXEC)));
+    if (bdev_fd < 0) {
+        int saved_errno = errno;
+        PLOG(ERROR) << "Failed to open block device: " << bdev_path;
+        cleanup(file_path, create);
+        return FiemapStatus::FromErrno(saved_errno);
+    }
+
+    uint64_t bdevsz;
+    if (!GetBlockDeviceSize(bdev_fd, bdev_path, &bdevsz)) {
+        int saved_errno = errno;
+        LOG(ERROR) << "Failed to get block device size for : " << bdev_path;
+        cleanup(file_path, create);
+        return FiemapStatus::FromErrno(saved_errno);
+    }
+
+    if (!create) {
+        file_size = GetFileSize(abs_path);
+        if (file_size == 0) {
+            LOG(ERROR) << "Invalid file size of zero bytes for file: " << abs_path;
+            return FiemapStatus::FromErrno(errno);
+        }
+    }
+
+    uint64_t blocksz;
+    uint32_t fs_type;
+    if (!PerformFileChecks(abs_path, &blocksz, &fs_type)) {
+        LOG(ERROR) << "Failed to validate file or file system for file:" << abs_path;
+        cleanup(abs_path, create);
+        return FiemapStatus::Error();
+    }
+
+    // Align up to the nearest block size.
+    if (file_size % blocksz) {
+        file_size += blocksz - (file_size % blocksz);
+    }
+
+    if (create) {
+        auto status =
+                AllocateFile(file_fd, abs_path, blocksz, file_size, fs_type, std::move(progress));
+        if (!status.is_ok()) {
+            LOG(ERROR) << "Failed to allocate file: " << abs_path << " of size: " << file_size
+                       << " bytes";
+            cleanup(abs_path, create);
+            return status;
+        }
+    }
+
+    // f2fs may move the file blocks around.
+    if (!PinFile(file_fd, abs_path, fs_type)) {
+        cleanup(abs_path, create);
+        LOG(ERROR) << "Failed to pin the file in storage";
+        return FiemapStatus::Error();
+    }
+
+    // now allocate the FiemapWriter and start setting it up
+    FiemapUniquePtr fmap(new FiemapWriter());
+    switch (fs_type) {
+        case EXT4_SUPER_MAGIC:
+        case F2FS_SUPER_MAGIC:
+            if (!ReadFiemap(file_fd, abs_path, &fmap->extents_)) {
+                LOG(ERROR) << "Failed to read fiemap of file: " << abs_path;
+                cleanup(abs_path, create);
+                return FiemapStatus::Error();
+            }
+            break;
+        case MSDOS_SUPER_MAGIC:
+            if (!ReadFibmap(file_fd, abs_path, &fmap->extents_)) {
+                LOG(ERROR) << "Failed to read fibmap of file: " << abs_path;
+                cleanup(abs_path, create);
+                return FiemapStatus::Error();
+            }
+            break;
+    }
+
+    fmap->file_path_ = abs_path;
+    fmap->bdev_path_ = bdev_path;
+    fmap->file_size_ = file_size;
+    fmap->bdev_size_ = bdevsz;
+    fmap->fs_type_ = fs_type;
+    fmap->block_size_ = blocksz;
+
+    LOG(VERBOSE) << "Successfully created FiemapWriter for file " << abs_path << " on block device "
+                 << bdev_path;
+    *out = std::move(fmap);
+    return FiemapStatus::Ok();
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/fiemap_writer_test.cpp b/fs_mgr/libfiemap/fiemap_writer_test.cpp
new file mode 100644
index 0000000..22a3722
--- /dev/null
+++ b/fs_mgr/libfiemap/fiemap_writer_test.cpp
@@ -0,0 +1,543 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <fcntl.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/vfs.h>
+#include <unistd.h>
+
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <android-base/unique_fd.h>
+#include <gtest/gtest.h>
+#include <libdm/loop_control.h>
+#include <libfiemap/fiemap_writer.h>
+#include <libfiemap/split_fiemap_writer.h>
+
+#include "utility.h"
+
+namespace android {
+namespace fiemap {
+
+using namespace std;
+using namespace std::string_literals;
+using namespace android::fiemap;
+using unique_fd = android::base::unique_fd;
+using LoopDevice = android::dm::LoopDevice;
+
+std::string gTestDir;
+uint64_t testfile_size = 536870912;  // default of 512MiB
+size_t gBlockSize = 0;
+
+class FiemapWriterTest : public ::testing::Test {
+  protected:
+    void SetUp() override {
+        const ::testing::TestInfo* tinfo = ::testing::UnitTest::GetInstance()->current_test_info();
+        testfile = gTestDir + "/"s + tinfo->name();
+    }
+
+    void TearDown() override { unlink(testfile.c_str()); }
+
+    // name of the file we use for testing
+    std::string testfile;
+};
+
+class SplitFiemapTest : public ::testing::Test {
+  protected:
+    void SetUp() override {
+        const ::testing::TestInfo* tinfo = ::testing::UnitTest::GetInstance()->current_test_info();
+        testfile = gTestDir + "/"s + tinfo->name();
+    }
+
+    void TearDown() override {
+        std::string message;
+        if (!SplitFiemap::RemoveSplitFiles(testfile, &message)) {
+            cerr << "Could not remove all split files: " << message;
+        }
+    }
+
+    // name of the file we use for testing
+    std::string testfile;
+};
+
+TEST_F(FiemapWriterTest, CreateImpossiblyLargeFile) {
+    // Try creating a file of size ~100TB but aligned to
+    // 512 byte to make sure block alignment tests don't
+    // fail.
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, 1099511627997184);
+    EXPECT_EQ(fptr, nullptr);
+    EXPECT_EQ(access(testfile.c_str(), F_OK), -1);
+    EXPECT_EQ(errno, ENOENT);
+}
+
+TEST_F(FiemapWriterTest, CreateUnalignedFile) {
+    // Try creating a file of size 4097 bytes which is guaranteed
+    // to be unaligned to all known block sizes.
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, gBlockSize + 1);
+    ASSERT_NE(fptr, nullptr);
+    ASSERT_EQ(fptr->size(), gBlockSize * 2);
+}
+
+TEST_F(FiemapWriterTest, CheckFilePath) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, gBlockSize);
+    ASSERT_NE(fptr, nullptr);
+    EXPECT_EQ(fptr->size(), gBlockSize);
+    EXPECT_EQ(fptr->file_path(), testfile);
+    EXPECT_EQ(access(testfile.c_str(), F_OK), 0);
+}
+
+TEST_F(FiemapWriterTest, CheckFileSize) {
+    // Create a large-ish file and test that the expected size matches.
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, 1024 * 1024 * 16);
+    ASSERT_NE(fptr, nullptr);
+
+    struct stat s;
+    ASSERT_EQ(stat(testfile.c_str(), &s), 0);
+    EXPECT_EQ(static_cast<uint64_t>(s.st_size), fptr->size());
+}
+
+TEST_F(FiemapWriterTest, CheckProgress) {
+    std::vector<uint64_t> expected;
+    size_t invocations = 0;
+    auto callback = [&](uint64_t done, uint64_t total) -> bool {
+        if (invocations >= expected.size()) {
+            return false;
+        }
+        EXPECT_EQ(done, expected[invocations]);
+        EXPECT_EQ(total, gBlockSize);
+        invocations++;
+        return true;
+    };
+
+    expected.push_back(gBlockSize);
+
+    auto ptr = FiemapWriter::Open(testfile, gBlockSize, true, std::move(callback));
+    EXPECT_NE(ptr, nullptr);
+    EXPECT_EQ(invocations, expected.size());
+}
+
+TEST_F(FiemapWriterTest, CheckPinning) {
+    auto ptr = FiemapWriter::Open(testfile, 4096);
+    ASSERT_NE(ptr, nullptr);
+    EXPECT_TRUE(FiemapWriter::HasPinnedExtents(testfile));
+}
+
+TEST_F(FiemapWriterTest, CheckBlockDevicePath) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, gBlockSize);
+    EXPECT_EQ(fptr->size(), gBlockSize);
+    EXPECT_EQ(fptr->bdev_path().find("/dev/block/"), size_t(0));
+    EXPECT_EQ(fptr->bdev_path().find("/dev/block/dm-"), string::npos);
+}
+
+TEST_F(FiemapWriterTest, CheckFileCreated) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, 32768);
+    ASSERT_NE(fptr, nullptr);
+    unique_fd fd(open(testfile.c_str(), O_RDONLY));
+    EXPECT_GT(fd, -1);
+}
+
+TEST_F(FiemapWriterTest, CheckFileSizeActual) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, testfile_size);
+    ASSERT_NE(fptr, nullptr);
+
+    struct stat sb;
+    ASSERT_EQ(stat(testfile.c_str(), &sb), 0);
+    EXPECT_GE(sb.st_size, testfile_size);
+}
+
+TEST_F(FiemapWriterTest, CheckFileExtents) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, testfile_size);
+    ASSERT_NE(fptr, nullptr);
+    EXPECT_GT(fptr->extents().size(), 0);
+}
+
+TEST_F(FiemapWriterTest, ExistingFile) {
+    // Create the file.
+    { ASSERT_NE(FiemapWriter::Open(testfile, gBlockSize), nullptr); }
+    // Test that we can still open it.
+    {
+        auto ptr = FiemapWriter::Open(testfile, 0, false);
+        ASSERT_NE(ptr, nullptr);
+        EXPECT_GT(ptr->extents().size(), 0);
+    }
+}
+
+TEST_F(FiemapWriterTest, FileDeletedOnError) {
+    auto callback = [](uint64_t, uint64_t) -> bool { return false; };
+    auto ptr = FiemapWriter::Open(testfile, gBlockSize, true, std::move(callback));
+    EXPECT_EQ(ptr, nullptr);
+    EXPECT_EQ(access(testfile.c_str(), F_OK), -1);
+    EXPECT_EQ(errno, ENOENT);
+}
+
+TEST_F(FiemapWriterTest, MaxBlockSize) {
+    uint64_t max_piece_size = 0;
+    ASSERT_TRUE(DetermineMaximumFileSize(testfile, &max_piece_size));
+    ASSERT_GT(max_piece_size, 0);
+}
+
+TEST_F(FiemapWriterTest, FibmapBlockAddressing) {
+    FiemapUniquePtr fptr = FiemapWriter::Open(testfile, gBlockSize);
+    ASSERT_NE(fptr, nullptr);
+
+    switch (fptr->fs_type()) {
+        case F2FS_SUPER_MAGIC:
+        case EXT4_SUPER_MAGIC:
+            // Skip the test for FIEMAP supported filesystems. This is really
+            // because f2fs/ext4 have caches that seem to defeat reading back
+            // directly from the block device, and writing directly is too
+            // dangerous.
+            std::cout << "Skipping test, filesystem does not use FIBMAP\n";
+            return;
+    }
+
+    bool uses_dm;
+    std::string bdev_path;
+    ASSERT_TRUE(FiemapWriter::GetBlockDeviceForFile(testfile, &bdev_path, &uses_dm));
+
+    if (uses_dm) {
+        // We could use a device-mapper wrapper here to bypass encryption, but
+        // really this test is for FIBMAP correctness on VFAT (where encryption
+        // is never used), so we don't bother.
+        std::cout << "Skipping test, block device is metadata encrypted\n";
+        return;
+    }
+
+    std::string data(fptr->size(), '\0');
+    for (size_t i = 0; i < data.size(); i++) {
+        data[i] = 'A' + static_cast<char>(data.size() % 26);
+    }
+
+    {
+        unique_fd fd(open(testfile.c_str(), O_WRONLY | O_CLOEXEC));
+        ASSERT_GE(fd, 0);
+        ASSERT_TRUE(android::base::WriteFully(fd, data.data(), data.size()));
+        ASSERT_EQ(fsync(fd), 0);
+    }
+
+    ASSERT_FALSE(fptr->extents().empty());
+    const auto& first_extent = fptr->extents()[0];
+
+    unique_fd bdev(open(fptr->bdev_path().c_str(), O_RDONLY | O_CLOEXEC));
+    ASSERT_GE(bdev, 0);
+
+    off_t where = first_extent.fe_physical;
+    ASSERT_EQ(lseek(bdev, where, SEEK_SET), where);
+
+    // Note: this will fail on encrypted folders.
+    std::string actual(data.size(), '\0');
+    ASSERT_GE(first_extent.fe_length, data.size());
+    ASSERT_TRUE(android::base::ReadFully(bdev, actual.data(), actual.size()));
+    EXPECT_EQ(memcmp(actual.data(), data.data(), data.size()), 0);
+}
+
+TEST_F(SplitFiemapTest, Create) {
+    auto ptr = SplitFiemap::Create(testfile, 1024 * 768, 1024 * 32);
+    ASSERT_NE(ptr, nullptr);
+
+    auto extents = ptr->extents();
+
+    // Destroy the fiemap, closing file handles. This should not delete them.
+    ptr = nullptr;
+
+    std::vector<std::string> files;
+    ASSERT_TRUE(SplitFiemap::GetSplitFileList(testfile, &files));
+    for (const auto& path : files) {
+        EXPECT_EQ(access(path.c_str(), F_OK), 0);
+    }
+
+    ASSERT_GE(extents.size(), files.size());
+}
+
+TEST_F(SplitFiemapTest, Open) {
+    {
+        auto ptr = SplitFiemap::Create(testfile, 1024 * 768, 1024 * 32);
+        ASSERT_NE(ptr, nullptr);
+    }
+
+    auto ptr = SplitFiemap::Open(testfile);
+    ASSERT_NE(ptr, nullptr);
+
+    auto extents = ptr->extents();
+    ASSERT_GE(extents.size(), 24);
+}
+
+TEST_F(SplitFiemapTest, DeleteOnFail) {
+    auto ptr = SplitFiemap::Create(testfile, 1024 * 1024 * 100, 1);
+    ASSERT_EQ(ptr, nullptr);
+
+    std::string first_file = testfile + ".0001";
+    ASSERT_NE(access(first_file.c_str(), F_OK), 0);
+    ASSERT_EQ(errno, ENOENT);
+    ASSERT_NE(access(testfile.c_str(), F_OK), 0);
+    ASSERT_EQ(errno, ENOENT);
+}
+
+static string ReadSplitFiles(const std::string& base_path, size_t num_files) {
+    std::string result;
+    for (int i = 0; i < num_files; i++) {
+        std::string path = base_path + android::base::StringPrintf(".%04d", i);
+        std::string data;
+        if (!android::base::ReadFileToString(path, &data)) {
+            return {};
+        }
+        result += data;
+    }
+    return result;
+}
+
+TEST_F(SplitFiemapTest, WriteWholeFile) {
+    static constexpr size_t kChunkSize = 32768;
+    static constexpr size_t kSize = kChunkSize * 3;
+    auto ptr = SplitFiemap::Create(testfile, kSize, kChunkSize);
+    ASSERT_NE(ptr, nullptr);
+
+    auto buffer = std::make_unique<int[]>(kSize / sizeof(int));
+    for (size_t i = 0; i < kSize / sizeof(int); i++) {
+        buffer[i] = i;
+    }
+    ASSERT_TRUE(ptr->Write(buffer.get(), kSize));
+
+    std::string expected(reinterpret_cast<char*>(buffer.get()), kSize);
+    auto actual = ReadSplitFiles(testfile, 3);
+    ASSERT_EQ(expected.size(), actual.size());
+    EXPECT_EQ(memcmp(expected.data(), actual.data(), actual.size()), 0);
+}
+
+TEST_F(SplitFiemapTest, WriteFileInChunks1) {
+    static constexpr size_t kChunkSize = 32768;
+    static constexpr size_t kSize = kChunkSize * 3;
+    auto ptr = SplitFiemap::Create(testfile, kSize, kChunkSize);
+    ASSERT_NE(ptr, nullptr);
+
+    auto buffer = std::make_unique<int[]>(kSize / sizeof(int));
+    for (size_t i = 0; i < kSize / sizeof(int); i++) {
+        buffer[i] = i;
+    }
+
+    // Write in chunks of 1000 (so some writes straddle the boundary of two
+    // files).
+    size_t bytes_written = 0;
+    while (bytes_written < kSize) {
+        size_t to_write = std::min(kSize - bytes_written, (size_t)1000);
+        char* data = reinterpret_cast<char*>(buffer.get()) + bytes_written;
+        ASSERT_TRUE(ptr->Write(data, to_write));
+        bytes_written += to_write;
+    }
+
+    std::string expected(reinterpret_cast<char*>(buffer.get()), kSize);
+    auto actual = ReadSplitFiles(testfile, 3);
+    ASSERT_EQ(expected.size(), actual.size());
+    EXPECT_EQ(memcmp(expected.data(), actual.data(), actual.size()), 0);
+}
+
+TEST_F(SplitFiemapTest, WriteFileInChunks2) {
+    static constexpr size_t kChunkSize = 32768;
+    static constexpr size_t kSize = kChunkSize * 3;
+    auto ptr = SplitFiemap::Create(testfile, kSize, kChunkSize);
+    ASSERT_NE(ptr, nullptr);
+
+    auto buffer = std::make_unique<int[]>(kSize / sizeof(int));
+    for (size_t i = 0; i < kSize / sizeof(int); i++) {
+        buffer[i] = i;
+    }
+
+    // Write in chunks of 32KiB so every write is exactly at the end of the
+    // current file.
+    size_t bytes_written = 0;
+    while (bytes_written < kSize) {
+        size_t to_write = std::min(kSize - bytes_written, kChunkSize);
+        char* data = reinterpret_cast<char*>(buffer.get()) + bytes_written;
+        ASSERT_TRUE(ptr->Write(data, to_write));
+        bytes_written += to_write;
+    }
+
+    std::string expected(reinterpret_cast<char*>(buffer.get()), kSize);
+    auto actual = ReadSplitFiles(testfile, 3);
+    ASSERT_EQ(expected.size(), actual.size());
+    EXPECT_EQ(memcmp(expected.data(), actual.data(), actual.size()), 0);
+}
+
+TEST_F(SplitFiemapTest, WritePastEnd) {
+    static constexpr size_t kChunkSize = 32768;
+    static constexpr size_t kSize = kChunkSize * 3;
+    auto ptr = SplitFiemap::Create(testfile, kSize, kChunkSize);
+    ASSERT_NE(ptr, nullptr);
+
+    auto buffer = std::make_unique<int[]>(kSize / sizeof(int));
+    for (size_t i = 0; i < kSize / sizeof(int); i++) {
+        buffer[i] = i;
+    }
+    ASSERT_TRUE(ptr->Write(buffer.get(), kSize));
+    ASSERT_FALSE(ptr->Write(buffer.get(), kSize));
+}
+
+class VerifyBlockWritesExt4 : public ::testing::Test {
+    // 2GB Filesystem and 4k block size by default
+    static constexpr uint64_t block_size = 4096;
+    static constexpr uint64_t fs_size = 2147483648;
+
+  protected:
+    void SetUp() override {
+        fs_path = std::string(getenv("TMPDIR")) + "/ext4_2G.img";
+        uint64_t count = fs_size / block_size;
+        std::string dd_cmd =
+                ::android::base::StringPrintf("/system/bin/dd if=/dev/zero of=%s bs=%" PRIu64
+                                              " count=%" PRIu64 " > /dev/null 2>&1",
+                                              fs_path.c_str(), block_size, count);
+        std::string mkfs_cmd =
+                ::android::base::StringPrintf("/system/bin/mkfs.ext4 -q %s", fs_path.c_str());
+        // create mount point
+        mntpoint = std::string(getenv("TMPDIR")) + "/fiemap_mnt";
+        ASSERT_EQ(mkdir(mntpoint.c_str(), S_IRWXU), 0);
+        // create file for the file system
+        int ret = system(dd_cmd.c_str());
+        ASSERT_EQ(ret, 0);
+        // Get and attach a loop device to the filesystem we created
+        LoopDevice loop_dev(fs_path, 10s);
+        ASSERT_TRUE(loop_dev.valid());
+        // create file system
+        ret = system(mkfs_cmd.c_str());
+        ASSERT_EQ(ret, 0);
+
+        // mount the file system
+        ASSERT_EQ(mount(loop_dev.device().c_str(), mntpoint.c_str(), "ext4", 0, nullptr), 0);
+    }
+
+    void TearDown() override {
+        umount(mntpoint.c_str());
+        rmdir(mntpoint.c_str());
+        unlink(fs_path.c_str());
+    }
+
+    std::string mntpoint;
+    std::string fs_path;
+};
+
+class VerifyBlockWritesF2fs : public ::testing::Test {
+    // 2GB Filesystem and 4k block size by default
+    static constexpr uint64_t block_size = 4096;
+    static constexpr uint64_t fs_size = 2147483648;
+
+  protected:
+    void SetUp() override {
+        fs_path = std::string(getenv("TMPDIR")) + "/f2fs_2G.img";
+        uint64_t count = fs_size / block_size;
+        std::string dd_cmd =
+                ::android::base::StringPrintf("/system/bin/dd if=/dev/zero of=%s bs=%" PRIu64
+                                              " count=%" PRIu64 " > /dev/null 2>&1",
+                                              fs_path.c_str(), block_size, count);
+        std::string mkfs_cmd =
+                ::android::base::StringPrintf("/system/bin/make_f2fs -q %s", fs_path.c_str());
+        // create mount point
+        mntpoint = std::string(getenv("TMPDIR")) + "/fiemap_mnt";
+        ASSERT_EQ(mkdir(mntpoint.c_str(), S_IRWXU), 0);
+        // create file for the file system
+        int ret = system(dd_cmd.c_str());
+        ASSERT_EQ(ret, 0);
+        // Get and attach a loop device to the filesystem we created
+        LoopDevice loop_dev(fs_path, 10s);
+        ASSERT_TRUE(loop_dev.valid());
+        // create file system
+        ret = system(mkfs_cmd.c_str());
+        ASSERT_EQ(ret, 0);
+
+        // mount the file system
+        ASSERT_EQ(mount(loop_dev.device().c_str(), mntpoint.c_str(), "f2fs", 0, nullptr), 0);
+    }
+
+    void TearDown() override {
+        umount(mntpoint.c_str());
+        rmdir(mntpoint.c_str());
+        unlink(fs_path.c_str());
+    }
+
+    std::string mntpoint;
+    std::string fs_path;
+};
+
+bool DetermineBlockSize() {
+    struct statfs s;
+    if (statfs(gTestDir.c_str(), &s)) {
+        std::cerr << "Could not call statfs: " << strerror(errno) << "\n";
+        return false;
+    }
+    if (!s.f_bsize) {
+        std::cerr << "Invalid block size: " << s.f_bsize << "\n";
+        return false;
+    }
+
+    gBlockSize = s.f_bsize;
+    return true;
+}
+
+}  // namespace fiemap
+}  // namespace android
+
+using namespace android::fiemap;
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    if (argc > 1 && argv[1] == "-h"s) {
+        cerr << "Usage: [test_dir] [file_size]\n";
+        cerr << "\n";
+        cerr << "Note: test_dir must be a writable, unencrypted directory.\n";
+        exit(EXIT_FAILURE);
+    }
+    ::android::base::InitLogging(argv, ::android::base::StderrLogger);
+
+    std::string root_dir = "/data/local/unencrypted";
+    if (access(root_dir.c_str(), F_OK)) {
+        root_dir = "/data";
+    }
+
+    std::string tempdir = root_dir + "/XXXXXX"s;
+    if (!mkdtemp(tempdir.data())) {
+        cerr << "unable to create tempdir on " << root_dir << "\n";
+        exit(EXIT_FAILURE);
+    }
+    if (!android::base::Realpath(tempdir, &gTestDir)) {
+        cerr << "unable to find realpath for " << tempdir;
+        exit(EXIT_FAILURE);
+    }
+
+    if (argc > 2) {
+        testfile_size = strtoull(argv[2], NULL, 0);
+        if (testfile_size == ULLONG_MAX) {
+            testfile_size = 512 * 1024 * 1024;
+        }
+    }
+
+    if (!DetermineBlockSize()) {
+        exit(EXIT_FAILURE);
+    }
+
+    auto result = RUN_ALL_TESTS();
+
+    std::string cmd = "rm -rf " + gTestDir;
+    system(cmd.c_str());
+
+    return result;
+}
diff --git a/fs_mgr/libfiemap/image_manager.cpp b/fs_mgr/libfiemap/image_manager.cpp
new file mode 100644
index 0000000..6717922
--- /dev/null
+++ b/fs_mgr/libfiemap/image_manager.cpp
@@ -0,0 +1,751 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <libfiemap/image_manager.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+#include <ext4_utils/ext4_utils.h>
+#include <fs_mgr/file_wait.h>
+#include <fs_mgr_dm_linear.h>
+#include <libdm/loop_control.h>
+#include <libfiemap/split_fiemap_writer.h>
+#include <libgsi/libgsi.h>
+
+#include "metadata.h"
+#include "utility.h"
+
+namespace android {
+namespace fiemap {
+
+using namespace std::literals;
+using android::base::ReadFileToString;
+using android::base::unique_fd;
+using android::dm::DeviceMapper;
+using android::dm::DmDeviceState;
+using android::dm::DmTable;
+using android::dm::DmTargetLinear;
+using android::dm::LoopControl;
+using android::fs_mgr::CreateLogicalPartition;
+using android::fs_mgr::CreateLogicalPartitionParams;
+using android::fs_mgr::CreateLogicalPartitions;
+using android::fs_mgr::DestroyLogicalPartition;
+using android::fs_mgr::GetBlockDevicePartitionName;
+using android::fs_mgr::GetBlockDevicePartitionNames;
+using android::fs_mgr::GetPartitionName;
+
+static constexpr char kTestImageMetadataDir[] = "/metadata/gsi/test";
+
+std::unique_ptr<ImageManager> ImageManager::Open(const std::string& dir_prefix) {
+    auto metadata_dir = "/metadata/gsi/" + dir_prefix;
+    auto data_dir = "/data/gsi/" + dir_prefix;
+    auto install_dir_file = gsi::DsuInstallDirFile(gsi::GetDsuSlot(dir_prefix));
+    std::string path;
+    if (ReadFileToString(install_dir_file, &path)) {
+        data_dir = path;
+    }
+    return Open(metadata_dir, data_dir);
+}
+
+std::unique_ptr<ImageManager> ImageManager::Open(const std::string& metadata_dir,
+                                                 const std::string& data_dir) {
+    return std::unique_ptr<ImageManager>(new ImageManager(metadata_dir, data_dir));
+}
+
+ImageManager::ImageManager(const std::string& metadata_dir, const std::string& data_dir)
+    : metadata_dir_(metadata_dir), data_dir_(data_dir) {
+    partition_opener_ = std::make_unique<android::fs_mgr::PartitionOpener>();
+}
+
+std::string ImageManager::GetImageHeaderPath(const std::string& name) {
+    return JoinPaths(data_dir_, name) + ".img";
+}
+
+// The status file has one entry per line, with each entry formatted as one of:
+//   dm:<name>
+//   loop:<path>
+//
+// This simplifies the process of tearing down a mapping, since we can simply
+// unmap each entry in the order it appears.
+std::string ImageManager::GetStatusFilePath(const std::string& image_name) {
+    return JoinPaths(metadata_dir_, image_name) + ".status";
+}
+
+static std::string GetStatusPropertyName(const std::string& image_name) {
+    // Note: we don't prefix |image_name|, because CreateLogicalPartition won't
+    // prefix the name either. There are no plans to change this at the moment,
+    // consumers of the image API must take care to use globally-unique image
+    // names.
+    return "gsid.mapped_image." + image_name;
+}
+
+void ImageManager::set_partition_opener(std::unique_ptr<IPartitionOpener>&& opener) {
+    partition_opener_ = std::move(opener);
+}
+
+bool ImageManager::IsImageMapped(const std::string& image_name) {
+    auto prop_name = GetStatusPropertyName(image_name);
+    if (android::base::GetProperty(prop_name, "").empty()) {
+        // If mapped in first-stage init, the dm-device will exist but not the
+        // property.
+        auto& dm = DeviceMapper::Instance();
+        return dm.GetState(image_name) != DmDeviceState::INVALID;
+    }
+    return true;
+}
+
+std::vector<std::string> ImageManager::GetAllBackingImages() {
+    std::vector<std::string> images;
+    if (!MetadataExists(metadata_dir_)) {
+        return images;
+    }
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (metadata) {
+        for (auto&& partition : metadata->partitions) {
+            images.push_back(partition.name);
+        }
+    }
+    return images;
+}
+
+bool ImageManager::BackingImageExists(const std::string& name) {
+    if (!MetadataExists(metadata_dir_)) {
+        return false;
+    }
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+    return !!FindPartition(*metadata.get(), name);
+}
+
+static bool IsUnreliablePinningAllowed(const std::string& path) {
+    return android::base::StartsWith(path, "/data/gsi/dsu/") ||
+           android::base::StartsWith(path, "/data/gsi/test/") ||
+           android::base::StartsWith(path, "/data/gsi/ota/test/");
+}
+
+FiemapStatus ImageManager::CreateBackingImage(
+        const std::string& name, uint64_t size, int flags,
+        std::function<bool(uint64_t, uint64_t)>&& on_progress) {
+    auto data_path = GetImageHeaderPath(name);
+    std::unique_ptr<SplitFiemap> fw;
+    auto status = SplitFiemap::Create(data_path, size, 0, &fw, on_progress);
+    if (!status.is_ok()) {
+        return status;
+    }
+
+    bool reliable_pinning;
+    if (!FilesystemHasReliablePinning(data_path, &reliable_pinning)) {
+        return FiemapStatus::Error();
+    }
+    if (!reliable_pinning && !IsUnreliablePinningAllowed(data_path)) {
+        // For historical reasons, we allow unreliable pinning for certain use
+        // cases (DSUs, testing) because the ultimate use case is either
+        // developer-oriented or ephemeral (the intent is to boot immediately
+        // into DSUs). For everything else - such as snapshots/OTAs or adb
+        // remount, we have a higher bar, and require the filesystem to support
+        // proper pinning.
+        LOG(ERROR) << "File system does not have reliable block pinning";
+        SplitFiemap::RemoveSplitFiles(data_path);
+        return FiemapStatus::Error();
+    }
+
+    // Except for testing, we do not allow persisting metadata that references
+    // device-mapper devices. It just doesn't make sense, because the device
+    // numbering may change on reboot. We allow it for testing since the images
+    // are not meant to survive reboot. Outside of tests, this can only happen
+    // if device-mapper is stacked in some complex way not supported by
+    // FiemapWriter.
+    auto device_path = GetDevicePathForFile(fw.get());
+    if (android::base::StartsWith(device_path, "/dev/block/dm-") &&
+        !android::base::StartsWith(metadata_dir_, kTestImageMetadataDir)) {
+        LOG(ERROR) << "Cannot persist images against device-mapper device: " << device_path;
+
+        fw = {};
+        SplitFiemap::RemoveSplitFiles(data_path);
+        return FiemapStatus::Error();
+    }
+
+    bool readonly = !!(flags & CREATE_IMAGE_READONLY);
+    if (!UpdateMetadata(metadata_dir_, name, fw.get(), size, readonly)) {
+        return FiemapStatus::Error();
+    }
+
+    if (flags & CREATE_IMAGE_ZERO_FILL) {
+        auto res = ZeroFillNewImage(name, 0);
+        if (!res.is_ok()) {
+            DeleteBackingImage(name);
+            return res;
+        }
+    }
+    return FiemapStatus::Ok();
+}
+
+FiemapStatus ImageManager::ZeroFillNewImage(const std::string& name, uint64_t bytes) {
+    auto data_path = GetImageHeaderPath(name);
+
+    // See the comment in MapImageDevice() about how this works.
+    std::string block_device;
+    bool can_use_devicemapper;
+    if (!FiemapWriter::GetBlockDeviceForFile(data_path, &block_device, &can_use_devicemapper)) {
+        LOG(ERROR) << "Could not determine block device for " << data_path;
+        return FiemapStatus::Error();
+    }
+
+    if (!can_use_devicemapper) {
+        // We've backed with loop devices, and since we store files in an
+        // unencrypted folder, the initial zeroes we wrote will suffice.
+        return FiemapStatus::Ok();
+    }
+
+    // data is dm-crypt, or FBE + dm-default-key. This means the zeroes written
+    // by libfiemap were encrypted, so we need to map the image in and correct
+    // this.
+    auto device = MappedDevice::Open(this, 10s, name);
+    if (!device) {
+        return FiemapStatus::Error();
+    }
+
+    static constexpr size_t kChunkSize = 4096;
+    std::string zeroes(kChunkSize, '\0');
+
+    uint64_t remaining;
+    if (bytes) {
+        remaining = bytes;
+    } else {
+        remaining = get_block_device_size(device->fd());
+        if (!remaining) {
+            PLOG(ERROR) << "Could not get block device size for " << device->path();
+            return FiemapStatus::FromErrno(errno);
+        }
+    }
+    while (remaining) {
+        uint64_t to_write = std::min(static_cast<uint64_t>(zeroes.size()), remaining);
+        if (!android::base::WriteFully(device->fd(), zeroes.data(),
+                                       static_cast<size_t>(to_write))) {
+            PLOG(ERROR) << "write failed: " << device->path();
+            return FiemapStatus::FromErrno(errno);
+        }
+        remaining -= to_write;
+    }
+    return FiemapStatus::Ok();
+}
+
+bool ImageManager::DeleteBackingImage(const std::string& name) {
+    // For dm-linear devices sitting on top of /data, we cannot risk deleting
+    // the file. The underlying blocks could be reallocated by the filesystem.
+    if (IsImageMapped(name)) {
+        LOG(ERROR) << "Cannot delete backing image " << name << " because mapped to a block device";
+        return false;
+    }
+
+#if defined __ANDROID_RECOVERY__
+    LOG(ERROR) << "Cannot remove images backed by /data in recovery";
+    return false;
+#else
+    std::string message;
+    auto header_file = GetImageHeaderPath(name);
+    if (!SplitFiemap::RemoveSplitFiles(header_file, &message)) {
+        // This is fatal, because we don't want to leave these files dangling.
+        LOG(ERROR) << "Error removing image " << name << ": " << message;
+        return false;
+    }
+
+    auto status_file = GetStatusFilePath(name);
+    if (!android::base::RemoveFileIfExists(status_file)) {
+        LOG(ERROR) << "Error removing " << status_file << ": " << message;
+    }
+    return RemoveImageMetadata(metadata_dir_, name);
+#endif
+}
+
+// Create a block device for an image file, using its extents in its
+// lp_metadata.
+bool ImageManager::MapWithDmLinear(const IPartitionOpener& opener, const std::string& name,
+                                   const std::chrono::milliseconds& timeout_ms, std::string* path) {
+    // :TODO: refresh extents in metadata file until f2fs is fixed.
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+
+    auto super = android::fs_mgr::GetMetadataSuperBlockDevice(*metadata.get());
+    auto block_device = android::fs_mgr::GetBlockDevicePartitionName(*super);
+
+    CreateLogicalPartitionParams params = {
+            .block_device = block_device,
+            .metadata = metadata.get(),
+            .partition_name = name,
+            .force_writable = true,
+            .timeout_ms = timeout_ms,
+            .partition_opener = &opener,
+    };
+    if (!CreateLogicalPartition(params, path)) {
+        LOG(ERROR) << "Error creating device-mapper node for image " << name;
+        return false;
+    }
+
+    auto status_string = "dm:" + name;
+    auto status_file = GetStatusFilePath(name);
+    if (!android::base::WriteStringToFile(status_string, status_file)) {
+        PLOG(ERROR) << "Could not write status file: " << status_file;
+        DestroyLogicalPartition(name);
+        return false;
+    }
+    return true;
+}
+
+// Helper to create a loop device for a file.
+static bool CreateLoopDevice(LoopControl& control, const std::string& file,
+                             const std::chrono::milliseconds& timeout_ms, std::string* path) {
+    static constexpr int kOpenFlags = O_RDWR | O_NOFOLLOW | O_CLOEXEC;
+    android::base::unique_fd file_fd(open(file.c_str(), kOpenFlags));
+    if (file_fd < 0) {
+        PLOG(ERROR) << "Could not open file: " << file;
+        return false;
+    }
+    if (!control.Attach(file_fd, timeout_ms, path)) {
+        LOG(ERROR) << "Could not create loop device for: " << file;
+        return false;
+    }
+    LOG(INFO) << "Created loop device " << *path << " for file " << file;
+    return true;
+}
+
+class AutoDetachLoopDevices final {
+  public:
+    AutoDetachLoopDevices(LoopControl& control, const std::vector<std::string>& devices)
+        : control_(control), devices_(devices), commit_(false) {}
+
+    ~AutoDetachLoopDevices() {
+        if (commit_) return;
+        for (const auto& device : devices_) {
+            control_.Detach(device);
+        }
+    }
+
+    void Commit() { commit_ = true; }
+
+  private:
+    LoopControl& control_;
+    const std::vector<std::string>& devices_;
+    bool commit_;
+};
+
+// If an image is stored across multiple files, this takes a list of loop
+// devices and joins them together using device-mapper.
+bool ImageManager::MapWithLoopDeviceList(const std::vector<std::string>& device_list,
+                                         const std::string& name,
+                                         const std::chrono::milliseconds& timeout_ms,
+                                         std::string* path) {
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+    auto partition = FindPartition(*metadata.get(), name);
+    if (!partition) {
+        LOG(ERROR) << "Could not find image in metadata: " << name;
+        return false;
+    }
+
+    // Since extent lengths are in sector units, the size should be a multiple
+    // of the sector size.
+    uint64_t partition_size = GetPartitionSize(*metadata.get(), *partition);
+    if (partition_size % LP_SECTOR_SIZE != 0) {
+        LOG(ERROR) << "Partition size not sector aligned: " << name << ", " << partition_size
+                   << " bytes";
+        return false;
+    }
+
+    DmTable table;
+
+    uint64_t start_sector = 0;
+    uint64_t sectors_needed = partition_size / LP_SECTOR_SIZE;
+    for (const auto& block_device : device_list) {
+        // The final block device must be == partition_size, otherwise we
+        // can't find the AVB footer on verified partitions.
+        static constexpr int kOpenFlags = O_RDWR | O_NOFOLLOW | O_CLOEXEC;
+        unique_fd fd(open(block_device.c_str(), kOpenFlags));
+        if (fd < 0) {
+            PLOG(ERROR) << "Open failed: " << block_device;
+            return false;
+        }
+
+        uint64_t file_size = get_block_device_size(fd);
+        uint64_t file_sectors = file_size / LP_SECTOR_SIZE;
+        uint64_t segment_size = std::min(file_sectors, sectors_needed);
+
+        table.Emplace<DmTargetLinear>(start_sector, segment_size, block_device, 0);
+
+        start_sector += segment_size;
+        sectors_needed -= segment_size;
+        if (sectors_needed == 0) {
+            break;
+        }
+    }
+
+    auto& dm = DeviceMapper::Instance();
+    if (!dm.CreateDevice(name, table, path, timeout_ms)) {
+        LOG(ERROR) << "Could not create device-mapper device over loop set";
+        return false;
+    }
+
+    // Build the status file.
+    std::vector<std::string> lines;
+    lines.emplace_back("dm:" + name);
+    for (const auto& block_device : device_list) {
+        lines.emplace_back("loop:" + block_device);
+    }
+    auto status_message = android::base::Join(lines, "\n");
+    auto status_file = GetStatusFilePath(name);
+    if (!android::base::WriteStringToFile(status_message, status_file)) {
+        PLOG(ERROR) << "Write failed: " << status_file;
+        dm.DeleteDevice(name);
+        return false;
+    }
+    return true;
+}
+
+static bool OptimizeLoopDevices(const std::vector<std::string>& device_list) {
+    for (const auto& device : device_list) {
+        unique_fd fd(open(device.c_str(), O_RDWR | O_CLOEXEC | O_NOFOLLOW));
+        if (fd < 0) {
+            PLOG(ERROR) << "Open failed: " << device;
+            return false;
+        }
+        if (!LoopControl::EnableDirectIo(fd)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+// Helper to use one or more loop devices around image files.
+bool ImageManager::MapWithLoopDevice(const std::string& name,
+                                     const std::chrono::milliseconds& timeout_ms,
+                                     std::string* path) {
+    auto image_header = GetImageHeaderPath(name);
+
+    std::vector<std::string> file_list;
+    if (!SplitFiemap::GetSplitFileList(image_header, &file_list)) {
+        LOG(ERROR) << "Could not get image file list";
+        return false;
+    }
+
+    // Map each image file as a loopback device.
+    LoopControl control;
+    std::vector<std::string> loop_devices;
+    AutoDetachLoopDevices auto_detach(control, loop_devices);
+
+    auto start_time = std::chrono::steady_clock::now();
+    for (const auto& file : file_list) {
+        auto now = std::chrono::steady_clock::now();
+        auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(now - start_time);
+
+        std::string loop_device;
+        if (!CreateLoopDevice(control, file, timeout_ms - elapsed, &loop_device)) {
+            break;
+        }
+        loop_devices.emplace_back(loop_device);
+    }
+    if (loop_devices.size() != file_list.size()) {
+        // The number of devices will mismatch if CreateLoopDevice() failed.
+        return false;
+    }
+
+    // If OptimizeLoopDevices fails, we'd use double the memory.
+    if (!OptimizeLoopDevices(loop_devices)) {
+        return false;
+    }
+
+    // If there's only one loop device (by far the most common case, splits
+    // will normally only happen on sdcards with FAT32), then just return that
+    // as the block device. Otherwise, we need to use dm-linear to stitch
+    // together all the loop devices we just created.
+    if (loop_devices.size() > 1) {
+        if (!MapWithLoopDeviceList(loop_devices, name, timeout_ms, path)) {
+            return false;
+        }
+    }
+
+    auto status_message = "loop:" + loop_devices.back();
+    auto status_file = GetStatusFilePath(name);
+    if (!android::base::WriteStringToFile(status_message, status_file)) {
+        PLOG(ERROR) << "Write failed: " << status_file;
+        return false;
+    }
+
+    auto_detach.Commit();
+
+    *path = loop_devices.back();
+    return true;
+}
+
+bool ImageManager::MapImageDevice(const std::string& name,
+                                  const std::chrono::milliseconds& timeout_ms, std::string* path) {
+    if (IsImageMapped(name)) {
+        LOG(ERROR) << "Backing image " << name << " is already mapped";
+        return false;
+    }
+
+    auto image_header = GetImageHeaderPath(name);
+
+#if !defined __ANDROID_RECOVERY__
+    // If there is a device-mapper node wrapping the block device, then we're
+    // able to create another node around it; the dm layer does not carry the
+    // exclusion lock down the stack when a mount occurs.
+    //
+    // If there is no intermediate device-mapper node, then partitions cannot be
+    // opened writable due to sepolicy and exclusivity of having a mounted
+    // filesystem. This should only happen on devices with no encryption, or
+    // devices with FBE and no metadata encryption. For these cases it suffices
+    // to perform normal file writes to /data/gsi (which is unencrypted).
+    std::string block_device;
+    bool can_use_devicemapper;
+    if (!FiemapWriter::GetBlockDeviceForFile(image_header, &block_device, &can_use_devicemapper)) {
+        LOG(ERROR) << "Could not determine block device for " << image_header;
+        return false;
+    }
+
+    if (can_use_devicemapper) {
+        if (!MapWithDmLinear(*partition_opener_.get(), name, timeout_ms, path)) {
+            return false;
+        }
+    } else if (!MapWithLoopDevice(name, timeout_ms, path)) {
+        return false;
+    }
+#else
+    // In recovery, we can *only* use device-mapper, since partitions aren't
+    // mounted. That also means we cannot call GetBlockDeviceForFile.
+    if (!MapWithDmLinear(*partition_opener_.get(), name, timeout_ms, path)) {
+        return false;
+    }
+#endif
+
+    // Set a property so we remember this is mapped.
+    auto prop_name = GetStatusPropertyName(name);
+    if (!android::base::SetProperty(prop_name, *path)) {
+        UnmapImageDevice(name, true);
+        return false;
+    }
+    return true;
+}
+
+bool ImageManager::MapImageWithDeviceMapper(const IPartitionOpener& opener, const std::string& name,
+                                            std::string* dev) {
+    std::string ignore_path;
+    if (!MapWithDmLinear(opener, name, {}, &ignore_path)) {
+        return false;
+    }
+
+    auto& dm = DeviceMapper::Instance();
+    if (!dm.GetDeviceString(name, dev)) {
+        return false;
+    }
+    return true;
+}
+
+bool ImageManager::UnmapImageDevice(const std::string& name) {
+    return UnmapImageDevice(name, false);
+}
+
+bool ImageManager::UnmapImageDevice(const std::string& name, bool force) {
+    if (!force && !IsImageMapped(name)) {
+        LOG(ERROR) << "Backing image " << name << " is not mapped";
+        return false;
+    }
+    auto& dm = DeviceMapper::Instance();
+    LoopControl loop;
+
+    std::string status;
+    auto status_file = GetStatusFilePath(name);
+    if (!android::base::ReadFileToString(status_file, &status)) {
+        PLOG(ERROR) << "Read failed: " << status_file;
+        return false;
+    }
+
+    auto lines = android::base::Split(status, "\n");
+    for (const auto& line : lines) {
+        auto pieces = android::base::Split(line, ":");
+        if (pieces.size() != 2) {
+            LOG(ERROR) << "Unknown status line";
+            continue;
+        }
+        if (pieces[0] == "dm") {
+            // Failure to remove a dm node is fatal, since we can't safely
+            // remove the file or loop devices.
+            const auto& name = pieces[1];
+            if (!dm.DeleteDeviceIfExists(name)) {
+                return false;
+            }
+        } else if (pieces[0] == "loop") {
+            // Failure to remove a loop device is not fatal, since we can still
+            // remove the backing file if we want.
+            loop.Detach(pieces[1]);
+        } else {
+            LOG(ERROR) << "Unknown status: " << pieces[0];
+        }
+    }
+
+    std::string message;
+    if (!android::base::RemoveFileIfExists(status_file, &message)) {
+        LOG(ERROR) << "Could not remove " << status_file << ": " << message;
+    }
+
+    auto status_prop = GetStatusPropertyName(name);
+    android::base::SetProperty(status_prop, "");
+    return true;
+}
+
+bool ImageManager::RemoveAllImages() {
+    if (!MetadataExists(metadata_dir_)) {
+        return true;
+    }
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return RemoveAllMetadata(metadata_dir_);
+    }
+
+    bool ok = true;
+    for (const auto& partition : metadata->partitions) {
+        auto partition_name = GetPartitionName(partition);
+        ok &= DeleteBackingImage(partition_name);
+    }
+    return ok && RemoveAllMetadata(metadata_dir_);
+}
+
+bool ImageManager::Validate() {
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+
+    for (const auto& partition : metadata->partitions) {
+        auto name = GetPartitionName(partition);
+        auto image_path = GetImageHeaderPath(name);
+        auto fiemap = SplitFiemap::Open(image_path);
+        if (!fiemap || !fiemap->HasPinnedExtents()) {
+            LOG(ERROR) << "Image is missing or was moved: " << image_path;
+            return false;
+        }
+    }
+    return true;
+}
+
+bool ImageManager::DisableImage(const std::string& name) {
+    return AddAttributes(metadata_dir_, name, LP_PARTITION_ATTR_DISABLED);
+}
+
+bool ImageManager::RemoveDisabledImages() {
+    if (!MetadataExists(metadata_dir_)) {
+        return true;
+    }
+
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+
+    bool ok = true;
+    for (const auto& partition : metadata->partitions) {
+        if (partition.attributes & LP_PARTITION_ATTR_DISABLED) {
+            ok &= DeleteBackingImage(GetPartitionName(partition));
+        }
+    }
+    return ok;
+}
+
+bool ImageManager::GetMappedImageDevice(const std::string& name, std::string* device) {
+    auto prop_name = GetStatusPropertyName(name);
+    *device = android::base::GetProperty(prop_name, "");
+    if (!device->empty()) {
+        return true;
+    }
+
+    auto& dm = DeviceMapper::Instance();
+    if (dm.GetState(name) == DmDeviceState::INVALID) {
+        return false;
+    }
+    return dm.GetDmDevicePathByName(name, device);
+}
+
+bool ImageManager::MapAllImages(const std::function<bool(std::set<std::string>)>& init) {
+    if (!MetadataExists(metadata_dir_)) {
+        return true;
+    }
+
+    auto metadata = OpenMetadata(metadata_dir_);
+    if (!metadata) {
+        return false;
+    }
+
+    std::set<std::string> devices;
+    for (const auto& name : GetBlockDevicePartitionNames(*metadata.get())) {
+        devices.emplace(name);
+    }
+    if (!init(std::move(devices))) {
+        return false;
+    }
+
+    auto data_device = GetMetadataSuperBlockDevice(*metadata.get());
+    auto data_partition_name = GetBlockDevicePartitionName(*data_device);
+    return CreateLogicalPartitions(*metadata.get(), data_partition_name);
+}
+
+std::unique_ptr<MappedDevice> MappedDevice::Open(IImageManager* manager,
+                                                 const std::chrono::milliseconds& timeout_ms,
+                                                 const std::string& name) {
+    std::string path;
+    if (!manager->MapImageDevice(name, timeout_ms, &path)) {
+        return nullptr;
+    }
+
+    auto device = std::unique_ptr<MappedDevice>(new MappedDevice(manager, name, path));
+    if (device->fd() < 0) {
+        return nullptr;
+    }
+    return device;
+}
+
+MappedDevice::MappedDevice(IImageManager* manager, const std::string& name, const std::string& path)
+    : manager_(manager), name_(name), path_(path) {
+    // The device is already mapped; try and open it.
+    fd_.reset(open(path.c_str(), O_RDWR | O_CLOEXEC));
+}
+
+MappedDevice::~MappedDevice() {
+    fd_ = {};
+    manager_->UnmapImageDevice(name_);
+}
+
+bool IImageManager::UnmapImageIfExists(const std::string& name) {
+    // No lock is needed even though this seems to be vulnerable to TOCTOU. If process A
+    // calls MapImageDevice() while process B calls UnmapImageIfExists(), and MapImageDevice()
+    // happens after process B checks IsImageMapped(), it would be as if MapImageDevice() is called
+    // after process B finishes calling UnmapImageIfExists(), resulting the image to be mapped,
+    // which is a reasonable sequence.
+    if (!IsImageMapped(name)) {
+        return true;
+    }
+    return UnmapImageDevice(name);
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/image_test.cpp b/fs_mgr/libfiemap/image_test.cpp
new file mode 100644
index 0000000..5388b44
--- /dev/null
+++ b/fs_mgr/libfiemap/image_test.cpp
@@ -0,0 +1,283 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <chrono>
+#include <iostream>
+#include <thread>
+
+#include <android-base/file.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+#include <ext4_utils/ext4_utils.h>
+#include <fs_mgr/file_wait.h>
+#include <gtest/gtest.h>
+#include <libdm/dm.h>
+#include <libfiemap/image_manager.h>
+
+using namespace android::dm;
+using namespace std::literals;
+using android::base::unique_fd;
+using android::fiemap::ImageManager;
+using android::fs_mgr::BlockDeviceInfo;
+using android::fs_mgr::PartitionOpener;
+using android::fs_mgr::WaitForFile;
+
+static std::string gDataPath;
+static std::string gDataMountPath;
+static constexpr char kMetadataPath[] = "/metadata/gsi/test";
+
+static constexpr uint64_t kTestImageSize = 1024 * 1024;
+
+class TestPartitionOpener final : public PartitionOpener {
+  public:
+    android::base::unique_fd Open(const std::string& partition_name, int flags) const override {
+        return PartitionOpener::Open(GetPathForBlockDeviceName(partition_name), flags);
+    }
+    bool GetInfo(const std::string& partition_name, BlockDeviceInfo* info) const override {
+        return PartitionOpener::GetInfo(GetPathForBlockDeviceName(partition_name), info);
+    }
+    std::string GetDeviceString(const std::string& partition_name) const override {
+        return PartitionOpener::GetDeviceString(GetPathForBlockDeviceName(partition_name));
+    }
+
+  private:
+    static std::string GetPathForBlockDeviceName(const std::string& name) {
+        if (android::base::StartsWith(name, "loop") || android::base::StartsWith(name, "dm-")) {
+            return "/dev/block/"s + name;
+        }
+        return name;
+    }
+};
+
+// This fixture is for tests against the device's native configuration.
+class NativeTest : public ::testing::Test {
+  protected:
+    void SetUp() override {
+        manager_ = ImageManager::Open(kMetadataPath, gDataPath);
+        ASSERT_NE(manager_, nullptr);
+
+        manager_->set_partition_opener(std::make_unique<TestPartitionOpener>());
+
+        const ::testing::TestInfo* tinfo = ::testing::UnitTest::GetInstance()->current_test_info();
+        base_name_ = tinfo->name();
+    }
+
+    void TearDown() override {
+        manager_->UnmapImageDevice(base_name_);
+        manager_->DeleteBackingImage(base_name_);
+    }
+
+    std::string PropertyName() { return "gsid.mapped_image." + base_name_; }
+
+    std::unique_ptr<ImageManager> manager_;
+    std::string base_name_;
+};
+
+TEST_F(NativeTest, CreateAndMap) {
+    ASSERT_TRUE(manager_->CreateBackingImage(base_name_, kTestImageSize, false, nullptr));
+
+    std::string path;
+    ASSERT_TRUE(manager_->MapImageDevice(base_name_, 5s, &path));
+    ASSERT_TRUE(manager_->IsImageMapped(base_name_));
+    ASSERT_EQ(android::base::GetProperty(PropertyName(), ""), path);
+
+    {
+        unique_fd fd(open(path.c_str(), O_RDWR | O_NOFOLLOW | O_CLOEXEC));
+        ASSERT_GE(fd, 0);
+        ASSERT_EQ(get_block_device_size(fd), kTestImageSize);
+    }
+
+    ASSERT_TRUE(manager_->UnmapImageDevice(base_name_));
+    ASSERT_FALSE(manager_->IsImageMapped(base_name_));
+    ASSERT_EQ(android::base::GetProperty(PropertyName(), ""), "");
+}
+
+TEST_F(NativeTest, DisableImage) {
+    ASSERT_TRUE(manager_->CreateBackingImage(base_name_, kTestImageSize, false, nullptr));
+    ASSERT_TRUE(manager_->BackingImageExists(base_name_));
+    ASSERT_TRUE(manager_->DisableImage(base_name_));
+    ASSERT_TRUE(manager_->RemoveDisabledImages());
+    ASSERT_TRUE(!manager_->BackingImageExists(base_name_));
+}
+
+TEST_F(NativeTest, GetMappedImageDevice) {
+    ASSERT_TRUE(manager_->CreateBackingImage(base_name_, kTestImageSize, false, nullptr));
+
+    std::string path1, path2;
+    ASSERT_TRUE(manager_->MapImageDevice(base_name_, 5s, &path1));
+    ASSERT_TRUE(manager_->GetMappedImageDevice(base_name_, &path2));
+    EXPECT_EQ(path1, path2);
+
+    ASSERT_TRUE(manager_->UnmapImageDevice(base_name_));
+}
+
+// This fixture is for tests against a simulated device environment. Rather
+// than use /data, we create an image and then layer a new filesystem within
+// it. Each test then decides how to mount and create layered images. This
+// allows us to test FBE vs FDE configurations.
+class ImageTest : public ::testing::Test {
+  public:
+    ImageTest() : dm_(DeviceMapper::Instance()) {}
+
+    void SetUp() override {
+        manager_ = ImageManager::Open(kMetadataPath, gDataPath);
+        ASSERT_NE(manager_, nullptr);
+
+        manager_->set_partition_opener(std::make_unique<TestPartitionOpener>());
+
+        submanager_ = ImageManager::Open(kMetadataPath + "/mnt"s, gDataPath + "/mnt"s);
+        ASSERT_NE(submanager_, nullptr);
+
+        submanager_->set_partition_opener(std::make_unique<TestPartitionOpener>());
+
+        // Ensure that metadata is cleared in between runs.
+        submanager_->RemoveAllImages();
+        manager_->RemoveAllImages();
+
+        const ::testing::TestInfo* tinfo = ::testing::UnitTest::GetInstance()->current_test_info();
+        base_name_ = tinfo->name();
+        test_image_name_ = base_name_ + "-base";
+        wrapper_device_name_ = base_name_ + "-wrapper";
+
+        ASSERT_TRUE(manager_->CreateBackingImage(base_name_, kTestImageSize * 16, false, nullptr));
+        ASSERT_TRUE(manager_->MapImageDevice(base_name_, 5s, &base_device_));
+    }
+
+    void TearDown() override {
+        submanager_->UnmapImageDevice(test_image_name_);
+        umount(gDataMountPath.c_str());
+        dm_.DeleteDeviceIfExists(wrapper_device_name_);
+        manager_->UnmapImageDevice(base_name_);
+        manager_->DeleteBackingImage(base_name_);
+    }
+
+  protected:
+    bool DoFormat(const std::string& device) {
+        // clang-format off
+        std::vector<std::string> mkfs_args = {
+            "/system/bin/mke2fs",
+            "-F",
+            "-b 4096",
+            "-t ext4",
+            "-m 0",
+            "-O has_journal",
+            device,
+            ">/dev/null",
+            "2>/dev/null",
+            "</dev/null",
+        };
+        // clang-format on
+        auto command = android::base::Join(mkfs_args, " ");
+        return system(command.c_str()) == 0;
+    }
+
+    std::unique_ptr<ImageManager> manager_;
+    std::unique_ptr<ImageManager> submanager_;
+
+    DeviceMapper& dm_;
+    std::string base_name_;
+    std::string base_device_;
+    std::string test_image_name_;
+    std::string wrapper_device_name_;
+};
+
+TEST_F(ImageTest, DirectMount) {
+    ASSERT_TRUE(DoFormat(base_device_));
+    ASSERT_EQ(mount(base_device_.c_str(), gDataMountPath.c_str(), "ext4", 0, nullptr), 0);
+    ASSERT_TRUE(submanager_->CreateBackingImage(test_image_name_, kTestImageSize, false, nullptr));
+
+    std::string path;
+    ASSERT_TRUE(submanager_->MapImageDevice(test_image_name_, 5s, &path));
+    ASSERT_TRUE(android::base::StartsWith(path, "/dev/block/loop"));
+}
+
+TEST_F(ImageTest, IndirectMount) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148874852";
+#endif
+    // Create a simple wrapper around the base device that we'll mount from
+    // instead. This will simulate the code paths for dm-crypt/default-key/bow
+    // and force us to use device-mapper rather than loop devices.
+    uint64_t device_size = 0;
+    {
+        unique_fd fd(open(base_device_.c_str(), O_RDWR | O_CLOEXEC));
+        ASSERT_GE(fd, 0);
+        device_size = get_block_device_size(fd);
+        ASSERT_EQ(device_size, kTestImageSize * 16);
+    }
+    uint64_t num_sectors = device_size / 512;
+
+    auto& dm = DeviceMapper::Instance();
+
+    DmTable table;
+    table.Emplace<DmTargetLinear>(0, num_sectors, base_device_, 0);
+    ASSERT_TRUE(dm.CreateDevice(wrapper_device_name_, table));
+
+    // Format and mount.
+    std::string wrapper_device;
+    ASSERT_TRUE(dm.GetDmDevicePathByName(wrapper_device_name_, &wrapper_device));
+    ASSERT_TRUE(WaitForFile(wrapper_device, 5s));
+    ASSERT_TRUE(DoFormat(wrapper_device));
+    ASSERT_EQ(mount(wrapper_device.c_str(), gDataMountPath.c_str(), "ext4", 0, nullptr), 0);
+
+    ASSERT_TRUE(submanager_->CreateBackingImage(test_image_name_, kTestImageSize, false, nullptr));
+
+    std::set<std::string> backing_devices;
+    auto init = [&](std::set<std::string> devices) -> bool {
+        backing_devices = std::move(devices);
+        return true;
+    };
+
+    std::string path;
+    ASSERT_TRUE(submanager_->MapImageDevice(test_image_name_, 5s, &path));
+    ASSERT_TRUE(android::base::StartsWith(path, "/dev/block/dm-"));
+    ASSERT_TRUE(submanager_->UnmapImageDevice(test_image_name_));
+    ASSERT_TRUE(submanager_->MapAllImages(init));
+    ASSERT_FALSE(backing_devices.empty());
+    ASSERT_TRUE(submanager_->UnmapImageDevice(test_image_name_));
+}
+
+bool Mkdir(const std::string& path) {
+    if (mkdir(path.c_str(), 0700) && errno != EEXIST) {
+        std::cerr << "Could not mkdir " << path << ": " << strerror(errno) << std::endl;
+        return false;
+    }
+    return true;
+}
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+
+    if (argc >= 2) {
+        gDataPath = argv[1];
+    } else {
+        gDataPath = "/data/gsi/test";
+    }
+    gDataMountPath = gDataPath + "/mnt"s;
+
+    if (!Mkdir(gDataPath) || !Mkdir(kMetadataPath) || !Mkdir(gDataMountPath) ||
+        !Mkdir(kMetadataPath + "/mnt"s)) {
+        return 1;
+    }
+    return RUN_ALL_TESTS();
+}
diff --git a/fs_mgr/libfiemap/include/libfiemap/fiemap_status.h b/fs_mgr/libfiemap/include/libfiemap/fiemap_status.h
new file mode 100644
index 0000000..d7b2cf1
--- /dev/null
+++ b/fs_mgr/libfiemap/include/libfiemap/fiemap_status.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <string>
+
+namespace android::fiemap {
+
+// Represent error status of libfiemap classes.
+class FiemapStatus {
+  public:
+    enum class ErrorCode : int32_t {
+        SUCCESS = 0,
+        // Generic non-recoverable failure.
+        ERROR = INT32_MIN,
+        // Not enough space
+        NO_SPACE = -ENOSPC,
+    };
+
+    // Create from a given errno (specified in errno,h)
+    static FiemapStatus FromErrno(int error_num) { return FiemapStatus(CastErrorCode(-error_num)); }
+
+    // Create from an integer error code that is expected to be an ErrorCode
+    // value. If it isn't, Error() is returned.
+    static FiemapStatus FromErrorCode(int32_t error_code) {
+        return FiemapStatus(CastErrorCode(error_code));
+    }
+
+    // Generic error.
+    static FiemapStatus Error() { return FiemapStatus(ErrorCode::ERROR); }
+
+    // Success.
+    static FiemapStatus Ok() { return FiemapStatus(ErrorCode::SUCCESS); }
+
+    ErrorCode error_code() const { return error_code_; }
+    bool is_ok() const { return error_code() == ErrorCode::SUCCESS; }
+    operator bool() const { return is_ok(); }
+
+    // For logging and debugging only.
+    std::string string() const;
+
+  protected:
+    FiemapStatus(ErrorCode code) : error_code_(code) {}
+
+  private:
+    ErrorCode error_code_;
+
+    static ErrorCode CastErrorCode(int error);
+};
+
+}  // namespace android::fiemap
diff --git a/fs_mgr/libfiemap/include/libfiemap/fiemap_writer.h b/fs_mgr/libfiemap/include/libfiemap/fiemap_writer.h
new file mode 100644
index 0000000..dd345f6
--- /dev/null
+++ b/fs_mgr/libfiemap/include/libfiemap/fiemap_writer.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <linux/fiemap.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <functional>
+#include <string>
+#include <vector>
+
+#include <android-base/unique_fd.h>
+
+#include <libfiemap/fiemap_status.h>
+
+namespace android {
+namespace fiemap {
+
+class FiemapWriter;
+using FiemapUniquePtr = std::unique_ptr<FiemapWriter>;
+
+class FiemapWriter final {
+  public:
+    // Factory method for FiemapWriter.
+    // The method returns FiemapUniquePtr that contains all the data necessary to be able to write
+    // to the given file directly using raw block i/o. The optional progress callback will be
+    // invoked, if create is true, while the file is being initialized. It receives the bytes
+    // written and the number of total bytes. If the callback returns false, the operation will
+    // fail.
+    //
+    // Note: when create is true, the file size will be aligned up to the nearest file system
+    // block.
+    static FiemapUniquePtr Open(const std::string& file_path, uint64_t file_size,
+                                bool create = true,
+                                std::function<bool(uint64_t, uint64_t)> progress = {});
+    static FiemapStatus Open(const std::string& file_path, uint64_t file_size, FiemapUniquePtr* out,
+                             bool create = true,
+                             std::function<bool(uint64_t, uint64_t)> progress = {});
+
+    // Check that a file still has the same extents since it was last opened with FiemapWriter,
+    // assuming the file was not resized outside of FiemapWriter. Returns false either on error
+    // or if the file was not pinned.
+    //
+    // This will always return true on Ext4. On F2FS, it will return true if either of the
+    // following cases are true:
+    //   - The file was never pinned.
+    //   - The file is pinned and has not been moved by the GC.
+    // Thus, this method should only be called for pinned files (such as those returned by
+    // FiemapWriter::Open).
+    static bool HasPinnedExtents(const std::string& file_path);
+
+    // Returns the underlying block device of a file. This will look past device-mapper layers
+    // as long as each layer would not change block mappings (i.e., dm-crypt, dm-bow, and dm-
+    // default-key tables are okay; dm-linear is not). If a mapping such as dm-linear is found,
+    // it will be returned in place of any physical block device.
+    //
+    // It is the caller's responsibility to check whether the returned block device is acceptable.
+    // Gsid, for example, will only accept /dev/block/by-name/userdata as the bottom device.
+    // Callers can check the device name (dm- or loop prefix), inspect sysfs, or compare the major
+    // number against a boot device.
+    //
+    // If device-mapper nodes were encountered, then |uses_dm| will be set to true.
+    static bool GetBlockDeviceForFile(const std::string& file_path, std::string* bdev_path,
+                                      bool* uses_dm = nullptr);
+
+    ~FiemapWriter() = default;
+
+    const std::string& file_path() const { return file_path_; };
+    uint64_t size() const { return file_size_; };
+    const std::string& bdev_path() const { return bdev_path_; };
+    uint64_t block_size() const { return block_size_; };
+    const std::vector<struct fiemap_extent>& extents() { return extents_; };
+    uint32_t fs_type() const { return fs_type_; }
+
+    // Non-copyable & Non-movable
+    FiemapWriter(const FiemapWriter&) = delete;
+    FiemapWriter& operator=(const FiemapWriter&) = delete;
+    FiemapWriter& operator=(FiemapWriter&&) = delete;
+    FiemapWriter(FiemapWriter&&) = delete;
+
+  private:
+    // Name of the file managed by this class.
+    std::string file_path_;
+    // Block device on which we have created the file.
+    std::string bdev_path_;
+
+    // Size in bytes of the file this class is writing
+    uint64_t file_size_;
+
+    // total size in bytes of the block device
+    uint64_t bdev_size_;
+
+    // Filesystem type where the file is being created.
+    // See: <uapi/linux/magic.h> for filesystem magic numbers
+    uint32_t fs_type_;
+
+    // block size as reported by the kernel of the underlying block device;
+    uint64_t block_size_;
+
+    // This file's fiemap
+    std::vector<struct fiemap_extent> extents_;
+
+    FiemapWriter() = default;
+};
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/include/libfiemap/image_manager.h b/fs_mgr/libfiemap/include/libfiemap/image_manager.h
new file mode 100644
index 0000000..60b98dc
--- /dev/null
+++ b/fs_mgr/libfiemap/include/libfiemap/image_manager.h
@@ -0,0 +1,212 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#pragma once
+
+#include <stdint.h>
+
+#include <chrono>
+#include <functional>
+#include <memory>
+#include <set>
+#include <string>
+
+#include <android-base/unique_fd.h>
+#include <libfiemap/fiemap_status.h>
+#include <liblp/partition_opener.h>
+
+namespace android {
+namespace fiemap {
+
+class IImageManager {
+  public:
+    using IPartitionOpener = android::fs_mgr::IPartitionOpener;
+
+    virtual ~IImageManager() {}
+
+    // When linking to libfiemap_binder, the Open() call will use binder.
+    // Otherwise, the Open() call will use the ImageManager implementation
+    // below.
+    static std::unique_ptr<IImageManager> Open(const std::string& dir_prefix,
+                                               const std::chrono::milliseconds& timeout_ms);
+
+    // Flags for CreateBackingImage().
+    static constexpr int CREATE_IMAGE_DEFAULT = 0x0;
+    static constexpr int CREATE_IMAGE_READONLY = 0x1;
+    static constexpr int CREATE_IMAGE_ZERO_FILL = 0x2;
+
+    // Create an image that can be mapped as a block-device. If |force_zero_fill|
+    // is true, the image will be zero-filled. Otherwise, the initial content
+    // of the image is undefined. If zero-fill is requested, and the operation
+    // cannot be completed, the image will be deleted and this function will
+    // return false.
+    virtual FiemapStatus CreateBackingImage(
+            const std::string& name, uint64_t size, int flags,
+            std::function<bool(uint64_t, uint64_t)>&& on_progress = nullptr) = 0;
+
+    // Delete an image created with CreateBackingImage. Its entry will be
+    // removed from the associated lp_metadata file.
+    virtual bool DeleteBackingImage(const std::string& name) = 0;
+
+    // Create a block device for an image previously created with
+    // CreateBackingImage. This will wait for at most |timeout_ms| milliseconds
+    // for |path| to be available, and will return false if not available in
+    // the requested time. If |timeout_ms| is zero, this is NOT guaranteed to
+    // return true. A timeout of 10s is recommended.
+    //
+    // Note that snapshots created with a readonly flag are always mapped
+    // writable. The flag is persisted in the lp_metadata file however, so if
+    // fs_mgr::CreateLogicalPartition(s) is used, the flag will be respected.
+    virtual bool MapImageDevice(const std::string& name,
+                                const std::chrono::milliseconds& timeout_ms, std::string* path) = 0;
+
+    // Unmap a block device previously mapped with mapBackingImage.
+    virtual bool UnmapImageDevice(const std::string& name) = 0;
+
+    // Returns true whether the named backing image exists. This does not check
+    // consistency with the /data partition, so that it can return true in
+    // recovery.
+    virtual bool BackingImageExists(const std::string& name) = 0;
+
+    // Returns true if the specified image is mapped to a device.
+    virtual bool IsImageMapped(const std::string& name) = 0;
+
+    // Map an image using device-mapper. This is not available over binder, and
+    // is intended only for first-stage init. The returned device is a major:minor
+    // device string.
+    virtual bool MapImageWithDeviceMapper(const IPartitionOpener& opener, const std::string& name,
+                                          std::string* dev) = 0;
+
+    // If an image was mapped, return the path to its device. Otherwise, return
+    // false. Errors are not reported in this case, calling IsImageMapped is
+    // not necessary.
+    virtual bool GetMappedImageDevice(const std::string& name, std::string* device) = 0;
+
+    // Map all images owned by this manager. This is only intended to be used
+    // during first-stage init, and as such, it does not provide a timeout
+    // (meaning libdm races can't be resolved, as ueventd is not available),
+    // and is not available over binder.
+    //
+    // The callback provided is given the list of dependent block devices.
+    virtual bool MapAllImages(const std::function<bool(std::set<std::string>)>& init) = 0;
+
+    // Mark an image as disabled. This is useful for marking an image as
+    // will-be-deleted in recovery, since recovery cannot mount /data.
+    //
+    // This is not available in binder, since it is intended for recovery.
+    // When binder is available, images can simply be removed.
+    virtual bool DisableImage(const std::string& name) = 0;
+
+    // Remove all images that been marked as disabled.
+    virtual bool RemoveDisabledImages() = 0;
+
+    // Get all backing image names.
+    virtual std::vector<std::string> GetAllBackingImages() = 0;
+
+    // Writes |bytes| zeros to |name| file. If |bytes| is 0, then the
+    // whole file if filled with zeros.
+    virtual FiemapStatus ZeroFillNewImage(const std::string& name, uint64_t bytes) = 0;
+
+    // Find and remove all images and metadata for this manager.
+    virtual bool RemoveAllImages() = 0;
+
+    virtual bool UnmapImageIfExists(const std::string& name);
+};
+
+class ImageManager final : public IImageManager {
+  public:
+    // Return an ImageManager for the given metadata and data directories. Both
+    // directories must already exist.
+    static std::unique_ptr<ImageManager> Open(const std::string& metadata_dir,
+                                              const std::string& data_dir);
+
+    // Helper function that derives the metadata and data dirs given a single
+    // prefix.
+    static std::unique_ptr<ImageManager> Open(const std::string& dir_prefix);
+
+    // Methods that must be implemented from IImageManager.
+    FiemapStatus CreateBackingImage(const std::string& name, uint64_t size, int flags,
+                                    std::function<bool(uint64_t, uint64_t)>&& on_progress) override;
+    bool DeleteBackingImage(const std::string& name) override;
+    bool MapImageDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms,
+                        std::string* path) override;
+    bool UnmapImageDevice(const std::string& name) override;
+    bool BackingImageExists(const std::string& name) override;
+    bool IsImageMapped(const std::string& name) override;
+    bool MapImageWithDeviceMapper(const IPartitionOpener& opener, const std::string& name,
+                                  std::string* dev) override;
+    bool RemoveAllImages() override;
+    bool DisableImage(const std::string& name) override;
+    bool RemoveDisabledImages() override;
+    bool GetMappedImageDevice(const std::string& name, std::string* device) override;
+    bool MapAllImages(const std::function<bool(std::set<std::string>)>& init) override;
+
+    std::vector<std::string> GetAllBackingImages();
+
+    // Validates that all images still have pinned extents. This will be removed
+    // once b/134588268 is fixed.
+    bool Validate();
+
+    void set_partition_opener(std::unique_ptr<IPartitionOpener>&& opener);
+
+    // Writes |bytes| zeros at the beginning of the passed image
+    FiemapStatus ZeroFillNewImage(const std::string& name, uint64_t bytes);
+
+  private:
+    ImageManager(const std::string& metadata_dir, const std::string& data_dir);
+    std::string GetImageHeaderPath(const std::string& name);
+    std::string GetStatusFilePath(const std::string& image_name);
+    bool MapWithLoopDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms,
+                           std::string* path);
+    bool MapWithLoopDeviceList(const std::vector<std::string>& device_list, const std::string& name,
+                               const std::chrono::milliseconds& timeout_ms, std::string* path);
+    bool MapWithDmLinear(const IPartitionOpener& opener, const std::string& name,
+                         const std::chrono::milliseconds& timeout_ms, std::string* path);
+    bool UnmapImageDevice(const std::string& name, bool force);
+
+    ImageManager(const ImageManager&) = delete;
+    ImageManager& operator=(const ImageManager&) = delete;
+    ImageManager& operator=(ImageManager&&) = delete;
+    ImageManager(ImageManager&&) = delete;
+
+    std::string metadata_dir_;
+    std::string data_dir_;
+    std::unique_ptr<IPartitionOpener> partition_opener_;
+};
+
+// RAII helper class for mapping and opening devices with an ImageManager.
+class MappedDevice final {
+  public:
+    static std::unique_ptr<MappedDevice> Open(IImageManager* manager,
+                                              const std::chrono::milliseconds& timeout_ms,
+                                              const std::string& name);
+
+    ~MappedDevice();
+
+    int fd() const { return fd_; }
+    const std::string& path() const { return path_; }
+
+  protected:
+    MappedDevice(IImageManager* manager, const std::string& name, const std::string& path);
+
+    IImageManager* manager_;
+    std::string name_;
+    std::string path_;
+    android::base::unique_fd fd_;
+};
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/include/libfiemap/split_fiemap_writer.h b/fs_mgr/libfiemap/include/libfiemap/split_fiemap_writer.h
new file mode 100644
index 0000000..d739fcf
--- /dev/null
+++ b/fs_mgr/libfiemap/include/libfiemap/split_fiemap_writer.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include <functional>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <android-base/unique_fd.h>
+
+#include <libfiemap/fiemap_status.h>
+#include <libfiemap/fiemap_writer.h>
+
+namespace android {
+namespace fiemap {
+
+// Wrapper around FiemapWriter that is able to split images across files if
+// necessary.
+class SplitFiemap final {
+  public:
+    using ProgressCallback = std::function<bool(uint64_t, uint64_t)>;
+
+    // Create a new split fiemap file. If |max_piece_size| is 0, the number of
+    // pieces will be determined automatically by detecting the filesystem.
+    // Otherwise, the file will be split evenly (with the remainder in the
+    // final file).
+    static std::unique_ptr<SplitFiemap> Create(const std::string& file_path, uint64_t file_size,
+                                               uint64_t max_piece_size,
+                                               ProgressCallback progress = {});
+    static FiemapStatus Create(const std::string& file_path, uint64_t file_size,
+                               uint64_t max_piece_size, std::unique_ptr<SplitFiemap>* out_val,
+                               ProgressCallback progress = {});
+
+    // Open an existing split fiemap file.
+    static std::unique_ptr<SplitFiemap> Open(const std::string& file_path);
+
+    ~SplitFiemap();
+
+    // Return a list of all files created for a split file.
+    static bool GetSplitFileList(const std::string& file_path, std::vector<std::string>* list);
+
+    // Destroy all components of a split file. If the root file does not exist,
+    // this returns true and does not report an error.
+    static bool RemoveSplitFiles(const std::string& file_path, std::string* message = nullptr);
+
+    // Return whether all components of a split file still have pinned extents.
+    bool HasPinnedExtents() const;
+
+    // Helper method for writing data that spans files. Note there is no seek
+    // method (yet); this starts at 0 and increments the position by |bytes|.
+    bool Write(const void* data, uint64_t bytes);
+
+    // Flush all writes to all split files.
+    bool Flush();
+
+    const std::vector<struct fiemap_extent>& extents();
+    uint32_t block_size() const;
+    uint64_t size() const { return total_size_; }
+    const std::string& bdev_path() const;
+
+    // Non-copyable & Non-movable
+    SplitFiemap(const SplitFiemap&) = delete;
+    SplitFiemap& operator=(const SplitFiemap&) = delete;
+    SplitFiemap& operator=(SplitFiemap&&) = delete;
+    SplitFiemap(SplitFiemap&&) = delete;
+
+  private:
+    SplitFiemap() = default;
+    void AddFile(FiemapUniquePtr&& file);
+
+    bool creating_ = false;
+    std::string list_file_;
+    std::vector<FiemapUniquePtr> files_;
+    std::vector<struct fiemap_extent> extents_;
+    uint64_t total_size_ = 0;
+
+    // Most recently open file and position for Write().
+    size_t cursor_index_ = 0;
+    uint64_t cursor_file_pos_ = 0;
+    android::base::unique_fd cursor_fd_;
+};
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/metadata.cpp b/fs_mgr/libfiemap/metadata.cpp
new file mode 100644
index 0000000..b0dfb5c
--- /dev/null
+++ b/fs_mgr/libfiemap/metadata.cpp
@@ -0,0 +1,225 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include "metadata.h"
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <liblp/builder.h>
+
+#include "utility.h"
+
+namespace android {
+namespace fiemap {
+
+using namespace android::fs_mgr;
+
+static constexpr uint32_t kMaxMetadataSize = 256 * 1024;
+
+std::string GetMetadataFile(const std::string& metadata_dir) {
+    return JoinPaths(metadata_dir, "lp_metadata");
+}
+
+bool MetadataExists(const std::string& metadata_dir) {
+    auto metadata_file = GetMetadataFile(metadata_dir);
+    if (access(metadata_file.c_str(), F_OK)) {
+        if (errno != ENOENT) {
+            PLOG(ERROR) << "Access " << metadata_file << " failed:";
+        }
+        return false;
+    }
+    return true;
+}
+
+std::unique_ptr<LpMetadata> OpenMetadata(const std::string& metadata_dir) {
+    auto metadata_file = GetMetadataFile(metadata_dir);
+    auto metadata = ReadFromImageFile(metadata_file);
+    if (!metadata) {
+        LOG(ERROR) << "Could not read metadata file " << metadata_file;
+        return nullptr;
+    }
+    return metadata;
+}
+
+// :TODO: overwrite on create if open fails
+std::unique_ptr<MetadataBuilder> OpenOrCreateMetadata(const std::string& metadata_dir,
+                                                      SplitFiemap* file) {
+    auto metadata_file = GetMetadataFile(metadata_dir);
+
+    PartitionOpener opener;
+    std::unique_ptr<MetadataBuilder> builder;
+    if (access(metadata_file.c_str(), R_OK)) {
+        if (errno != ENOENT) {
+            PLOG(ERROR) << "Access " << metadata_file << " failed:";
+            return nullptr;
+        }
+
+        auto data_device = GetDevicePathForFile(file);
+
+        BlockDeviceInfo device_info;
+        if (!opener.GetInfo(data_device, &device_info)) {
+            LOG(ERROR) << "Could not read partition: " << data_device;
+            return nullptr;
+        }
+
+        std::vector<BlockDeviceInfo> block_devices = {device_info};
+        auto super_name = android::base::Basename(data_device);
+        builder = MetadataBuilder::New(block_devices, super_name, kMaxMetadataSize, 1);
+    } else {
+        auto metadata = OpenMetadata(metadata_dir);
+        if (!metadata) {
+            return nullptr;
+        }
+        builder = MetadataBuilder::New(*metadata.get(), &opener);
+    }
+
+    if (!builder) {
+        LOG(ERROR) << "Could not create metadata builder";
+        return nullptr;
+    }
+    return builder;
+}
+
+bool SaveMetadata(MetadataBuilder* builder, const std::string& metadata_dir) {
+    auto exported = builder->Export();
+    if (!exported) {
+        LOG(ERROR) << "Unable to export new metadata";
+        return false;
+    }
+
+    // If there are no more partitions in the metadata, just delete the file.
+    auto metadata_file = GetMetadataFile(metadata_dir);
+    if (exported->partitions.empty() && android::base::RemoveFileIfExists(metadata_file)) {
+        return true;
+    }
+    if (!WriteToImageFile(metadata_file, *exported.get())) {
+        LOG(ERROR) << "Unable to save new metadata";
+        return false;
+    }
+    return true;
+}
+
+bool RemoveAllMetadata(const std::string& dir) {
+    auto metadata_file = GetMetadataFile(dir);
+    std::string err;
+    if (!android::base::RemoveFileIfExists(metadata_file, &err)) {
+        LOG(ERROR) << "Could not remove metadata file: " << err;
+        return false;
+    }
+    return true;
+}
+
+bool FillPartitionExtents(MetadataBuilder* builder, Partition* partition, SplitFiemap* file,
+                          uint64_t partition_size) {
+    auto block_device = android::base::Basename(GetDevicePathForFile(file));
+
+    uint64_t sectors_needed = partition_size / LP_SECTOR_SIZE;
+    for (const auto& extent : file->extents()) {
+        if (extent.fe_length % LP_SECTOR_SIZE != 0) {
+            LOG(ERROR) << "Extent is not sector-aligned: " << extent.fe_length;
+            return false;
+        }
+        if (extent.fe_physical % LP_SECTOR_SIZE != 0) {
+            LOG(ERROR) << "Extent physical sector is not sector-aligned: " << extent.fe_physical;
+            return false;
+        }
+
+        uint64_t num_sectors =
+                std::min(static_cast<uint64_t>(extent.fe_length / LP_SECTOR_SIZE), sectors_needed);
+        if (!num_sectors || !sectors_needed) {
+            // This should never happen, but we include it just in case. It would
+            // indicate that the last filesystem block had multiple extents.
+            LOG(WARNING) << "FiemapWriter allocated extra blocks";
+            break;
+        }
+
+        uint64_t physical_sector = extent.fe_physical / LP_SECTOR_SIZE;
+        if (!builder->AddLinearExtent(partition, block_device, num_sectors, physical_sector)) {
+            LOG(ERROR) << "Could not add extent to lp metadata";
+            return false;
+        }
+
+        sectors_needed -= num_sectors;
+    }
+    return true;
+}
+
+bool RemoveImageMetadata(const std::string& metadata_dir, const std::string& partition_name) {
+    if (!MetadataExists(metadata_dir)) {
+        return true;
+    }
+    auto metadata = OpenMetadata(metadata_dir);
+    if (!metadata) {
+        return false;
+    }
+
+    PartitionOpener opener;
+    auto builder = MetadataBuilder::New(*metadata.get(), &opener);
+    if (!builder) {
+        return false;
+    }
+    builder->RemovePartition(partition_name);
+    return SaveMetadata(builder.get(), metadata_dir);
+}
+
+bool UpdateMetadata(const std::string& metadata_dir, const std::string& partition_name,
+                    SplitFiemap* file, uint64_t partition_size, bool readonly) {
+    auto builder = OpenOrCreateMetadata(metadata_dir, file);
+    if (!builder) {
+        return false;
+    }
+    auto partition = builder->FindPartition(partition_name);
+    if (!partition) {
+        int attrs = 0;
+        if (readonly) attrs |= LP_PARTITION_ATTR_READONLY;
+
+        if ((partition = builder->AddPartition(partition_name, attrs)) == nullptr) {
+            LOG(ERROR) << "Could not add partition " << partition_name << " to metadata";
+            return false;
+        }
+    }
+    partition->RemoveExtents();
+
+    if (!FillPartitionExtents(builder.get(), partition, file, partition_size)) {
+        return false;
+    }
+    return SaveMetadata(builder.get(), metadata_dir);
+}
+
+bool AddAttributes(const std::string& metadata_dir, const std::string& partition_name,
+                   uint32_t attributes) {
+    auto metadata = OpenMetadata(metadata_dir);
+    if (!metadata) {
+        return false;
+    }
+    auto builder = MetadataBuilder::New(*metadata.get());
+    if (!builder) {
+        return false;
+    }
+    auto partition = builder->FindPartition(partition_name);
+    if (!partition) {
+        return false;
+    }
+    partition->set_attributes(partition->attributes() | attributes);
+    return SaveMetadata(builder.get(), metadata_dir);
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/metadata.h b/fs_mgr/libfiemap/metadata.h
new file mode 100644
index 0000000..4eb3ad5
--- /dev/null
+++ b/fs_mgr/libfiemap/metadata.h
@@ -0,0 +1,38 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+
+#include <libfiemap/split_fiemap_writer.h>
+#include <liblp/liblp.h>
+
+namespace android {
+namespace fiemap {
+
+bool MetadataExists(const std::string& metadata_dir);
+std::unique_ptr<android::fs_mgr::LpMetadata> OpenMetadata(const std::string& metadata_dir);
+bool UpdateMetadata(const std::string& metadata_dir, const std::string& partition_name,
+                    SplitFiemap* file, uint64_t partition_size, bool readonly);
+bool AddAttributes(const std::string& metadata_dir, const std::string& partition_name,
+                   uint32_t attributes);
+bool RemoveImageMetadata(const std::string& metadata_dir, const std::string& partition_name);
+bool RemoveAllMetadata(const std::string& dir);
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/tools/Android.bp b/fs_mgr/libfiemap/passthrough.cpp
similarity index 61%
copy from libmeminfo/libdmabufinfo/tools/Android.bp
copy to fs_mgr/libfiemap/passthrough.cpp
index 224b68e..1ccd9a0 100644
--- a/libmeminfo/libdmabufinfo/tools/Android.bp
+++ b/fs_mgr/libfiemap/passthrough.cpp
@@ -1,3 +1,4 @@
+//
 // Copyright (C) 2019 The Android Open Source Project
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
@@ -11,20 +12,18 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+//
 
-cc_binary {
-    name: "dmabuf_dump",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
+#include <libfiemap/image_manager.h>
 
-    srcs: ["dmabuf_dump.cpp"],
-    shared_libs: [
-        "libbase",
-    ],
-    static_libs: [
-        "libdmabufinfo",
-    ],
-    product_specific: true,
-}
\ No newline at end of file
+namespace android {
+namespace fiemap {
+
+std::unique_ptr<IImageManager> IImageManager::Open(const std::string& dir_prefix,
+                                                   const std::chrono::milliseconds& timeout_ms) {
+    (void)timeout_ms;
+    return ImageManager::Open(dir_prefix);
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/split_fiemap_writer.cpp b/fs_mgr/libfiemap/split_fiemap_writer.cpp
new file mode 100644
index 0000000..12c7397
--- /dev/null
+++ b/fs_mgr/libfiemap/split_fiemap_writer.cpp
@@ -0,0 +1,320 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <libfiemap/split_fiemap_writer.h>
+
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+
+#include "utility.h"
+
+namespace android {
+namespace fiemap {
+
+using android::base::unique_fd;
+
+// We use a four-digit suffix at the end of filenames.
+static const size_t kMaxFilePieces = 500;
+
+std::unique_ptr<SplitFiemap> SplitFiemap::Create(const std::string& file_path, uint64_t file_size,
+                                                 uint64_t max_piece_size,
+                                                 ProgressCallback progress) {
+    std::unique_ptr<SplitFiemap> ret;
+    if (!Create(file_path, file_size, max_piece_size, &ret, progress).is_ok()) {
+        return nullptr;
+    }
+    return ret;
+}
+
+FiemapStatus SplitFiemap::Create(const std::string& file_path, uint64_t file_size,
+                                 uint64_t max_piece_size, std::unique_ptr<SplitFiemap>* out_val,
+                                 ProgressCallback progress) {
+    out_val->reset();
+
+    if (!file_size) {
+        LOG(ERROR) << "Cannot create a fiemap for a 0-length file: " << file_path;
+        return FiemapStatus::Error();
+    }
+
+    if (!max_piece_size) {
+        auto status = DetermineMaximumFileSize(file_path, &max_piece_size);
+        if (!status.is_ok()) {
+            LOG(ERROR) << "Could not determine maximum file size for " << file_path;
+            return status;
+        }
+    }
+
+    // Remove any existing file.
+    RemoveSplitFiles(file_path);
+
+    // Call |progress| only when the total percentage would significantly change.
+    int permille = -1;
+    uint64_t total_bytes_written = 0;
+    auto on_progress = [&](uint64_t written, uint64_t) -> bool {
+        uint64_t actual_written = total_bytes_written + written;
+        int new_permille = (actual_written * 1000) / file_size;
+        if (new_permille != permille && actual_written < file_size) {
+            if (progress && !progress(actual_written, file_size)) {
+                return false;
+            }
+            permille = new_permille;
+        }
+        return true;
+    };
+    std::unique_ptr<SplitFiemap> out(new SplitFiemap());
+    out->creating_ = true;
+    out->list_file_ = file_path;
+
+    // Create the split files.
+    uint64_t remaining_bytes = file_size;
+    while (remaining_bytes) {
+        if (out->files_.size() >= kMaxFilePieces) {
+            LOG(ERROR) << "Requested size " << file_size << " created too many split files";
+            out.reset();
+            return FiemapStatus::Error();
+        }
+        std::string chunk_path =
+                android::base::StringPrintf("%s.%04d", file_path.c_str(), (int)out->files_.size());
+        uint64_t chunk_size = std::min(max_piece_size, remaining_bytes);
+        FiemapUniquePtr writer;
+        auto status = FiemapWriter::Open(chunk_path, chunk_size, &writer, true, on_progress);
+        if (!status.is_ok()) {
+            out.reset();
+            return status;
+        }
+
+        // To make sure the alignment doesn't create too much inconsistency, we
+        // account the *actual* size, not the requested size.
+        total_bytes_written += writer->size();
+
+        // writer->size() is block size aligned and could be bigger than remaining_bytes
+        // If remaining_bytes is bigger, set remaining_bytes to 0 to avoid underflow error.
+        remaining_bytes = remaining_bytes > writer->size() ? (remaining_bytes - writer->size()) : 0;
+
+        out->AddFile(std::move(writer));
+    }
+
+    // Create the split file list.
+    unique_fd fd(open(out->list_file_.c_str(), O_CREAT | O_WRONLY | O_CLOEXEC, 0660));
+    if (fd < 0) {
+        PLOG(ERROR) << "Failed to open " << file_path;
+        out.reset();
+        return FiemapStatus::FromErrno(errno);
+    }
+
+    for (const auto& writer : out->files_) {
+        std::string line = android::base::Basename(writer->file_path()) + "\n";
+        if (!android::base::WriteFully(fd, line.data(), line.size())) {
+            PLOG(ERROR) << "Write failed " << file_path;
+            out.reset();
+            return FiemapStatus::FromErrno(errno);
+        }
+    }
+
+    // Unset this bit, so we don't unlink on destruction.
+    out->creating_ = false;
+    *out_val = std::move(out);
+    return FiemapStatus::Ok();
+}
+
+std::unique_ptr<SplitFiemap> SplitFiemap::Open(const std::string& file_path) {
+    std::vector<std::string> files;
+    if (!GetSplitFileList(file_path, &files)) {
+        return nullptr;
+    }
+
+    std::unique_ptr<SplitFiemap> out(new SplitFiemap());
+    out->list_file_ = file_path;
+
+    for (const auto& file : files) {
+        auto writer = FiemapWriter::Open(file, 0, false);
+        if (!writer) {
+            // Error was logged in Open().
+            return nullptr;
+        }
+        out->AddFile(std::move(writer));
+    }
+    return out;
+}
+
+bool SplitFiemap::GetSplitFileList(const std::string& file_path, std::vector<std::string>* list) {
+    // This is not the most efficient thing, but it is simple and recovering
+    // the fiemap/fibmap is much more expensive.
+    std::string contents;
+    if (!android::base::ReadFileToString(file_path, &contents, true)) {
+        PLOG(ERROR) << "Error reading file: " << file_path;
+        return false;
+    }
+
+    std::vector<std::string> names = android::base::Split(contents, "\n");
+    std::string dir = android::base::Dirname(file_path);
+    for (const auto& name : names) {
+        if (!name.empty()) {
+            list->emplace_back(dir + "/" + name);
+        }
+    }
+    return true;
+}
+
+bool SplitFiemap::RemoveSplitFiles(const std::string& file_path, std::string* message) {
+    // Early exit if this does not exist, and do not report an error.
+    if (access(file_path.c_str(), F_OK) && errno == ENOENT) {
+        return true;
+    }
+
+    bool ok = true;
+    std::vector<std::string> files;
+    if (GetSplitFileList(file_path, &files)) {
+        for (const auto& file : files) {
+            ok &= android::base::RemoveFileIfExists(file, message);
+        }
+    }
+    ok &= android::base::RemoveFileIfExists(file_path, message);
+    return ok;
+}
+
+bool SplitFiemap::HasPinnedExtents() const {
+    for (const auto& file : files_) {
+        if (!FiemapWriter::HasPinnedExtents(file->file_path())) {
+            return false;
+        }
+    }
+    return true;
+}
+
+const std::vector<struct fiemap_extent>& SplitFiemap::extents() {
+    if (extents_.empty()) {
+        for (const auto& file : files_) {
+            const auto& extents = file->extents();
+            extents_.insert(extents_.end(), extents.begin(), extents.end());
+        }
+    }
+    return extents_;
+}
+
+bool SplitFiemap::Write(const void* data, uint64_t bytes) {
+    // Open the current file.
+    FiemapWriter* file = files_[cursor_index_].get();
+
+    const uint8_t* data_ptr = reinterpret_cast<const uint8_t*>(data);
+    uint64_t bytes_remaining = bytes;
+    while (bytes_remaining) {
+        // How many bytes can we write into the current file?
+        uint64_t file_bytes_left = file->size() - cursor_file_pos_;
+        if (!file_bytes_left) {
+            if (cursor_index_ == files_.size() - 1) {
+                LOG(ERROR) << "write past end of file requested";
+                return false;
+            }
+
+            // No space left in the current file, but we have more files to
+            // use, so prep the next one.
+            cursor_fd_ = {};
+            cursor_file_pos_ = 0;
+            file = files_[++cursor_index_].get();
+            file_bytes_left = file->size();
+        }
+
+        // Open the current file if it's not open.
+        if (cursor_fd_ < 0) {
+            cursor_fd_.reset(open(file->file_path().c_str(), O_CLOEXEC | O_WRONLY));
+            if (cursor_fd_ < 0) {
+                PLOG(ERROR) << "open failed: " << file->file_path();
+                return false;
+            }
+            CHECK(cursor_file_pos_ == 0);
+        }
+
+        if (!FiemapWriter::HasPinnedExtents(file->file_path())) {
+            LOG(ERROR) << "file is no longer pinned: " << file->file_path();
+            return false;
+        }
+
+        uint64_t bytes_to_write = std::min(file_bytes_left, bytes_remaining);
+        if (!android::base::WriteFully(cursor_fd_, data_ptr, bytes_to_write)) {
+            PLOG(ERROR) << "write failed: " << file->file_path();
+            return false;
+        }
+        data_ptr += bytes_to_write;
+        bytes_remaining -= bytes_to_write;
+        cursor_file_pos_ += bytes_to_write;
+    }
+
+    // If we've reached the end of the current file, close it for sanity.
+    if (cursor_file_pos_ == file->size()) {
+        cursor_fd_ = {};
+    }
+    return true;
+}
+
+bool SplitFiemap::Flush() {
+    for (const auto& file : files_) {
+        unique_fd fd(open(file->file_path().c_str(), O_RDONLY | O_CLOEXEC));
+        if (fd < 0) {
+            PLOG(ERROR) << "open failed: " << file->file_path();
+            return false;
+        }
+        if (fsync(fd)) {
+            PLOG(ERROR) << "fsync failed: " << file->file_path();
+            return false;
+        }
+    }
+    return true;
+}
+
+SplitFiemap::~SplitFiemap() {
+    if (!creating_) {
+        return;
+    }
+
+    // We failed to finish creating, so unlink everything.
+    unlink(list_file_.c_str());
+    for (auto&& file : files_) {
+        std::string path = file->file_path();
+        file = nullptr;
+
+        unlink(path.c_str());
+    }
+}
+
+void SplitFiemap::AddFile(FiemapUniquePtr&& file) {
+    total_size_ += file->size();
+    files_.emplace_back(std::move(file));
+}
+
+uint32_t SplitFiemap::block_size() const {
+    return files_[0]->block_size();
+}
+
+const std::string& SplitFiemap::bdev_path() const {
+    return files_[0]->bdev_path();
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/testdata/file_32k b/fs_mgr/libfiemap/testdata/file_32k
new file mode 100644
index 0000000..12f3be4
--- /dev/null
+++ b/fs_mgr/libfiemap/testdata/file_32k
Binary files differ
diff --git a/fs_mgr/libfiemap/testdata/file_4k b/fs_mgr/libfiemap/testdata/file_4k
new file mode 100644
index 0000000..08e7df1
--- /dev/null
+++ b/fs_mgr/libfiemap/testdata/file_4k
Binary files differ
diff --git a/fs_mgr/libfiemap/testdata/unaligned_file b/fs_mgr/libfiemap/testdata/unaligned_file
new file mode 100644
index 0000000..c107c26
--- /dev/null
+++ b/fs_mgr/libfiemap/testdata/unaligned_file
Binary files differ
diff --git a/fs_mgr/libfiemap/utility.cpp b/fs_mgr/libfiemap/utility.cpp
new file mode 100644
index 0000000..bbb0510
--- /dev/null
+++ b/fs_mgr/libfiemap/utility.cpp
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "utility.h"
+
+#include <stdint.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <sys/vfs.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <libfiemap/fiemap_writer.h>
+
+namespace android {
+namespace fiemap {
+
+using namespace std::string_literals;
+using android::base::unique_fd;
+
+static constexpr char kUserdataDevice[] = "/dev/block/by-name/userdata";
+
+FiemapStatus DetermineMaximumFileSize(const std::string& file_path, uint64_t* result) {
+    // Create the smallest file possible (one block).
+    FiemapUniquePtr writer;
+    auto status = FiemapWriter::Open(file_path, 1, &writer);
+    if (!status.is_ok()) {
+        return status;
+    }
+
+    *result = 0;
+    switch (writer->fs_type()) {
+        case EXT4_SUPER_MAGIC:
+            // The minimum is 16GiB, so just report that. If we wanted we could parse the
+            // superblock and figure out if 64-bit support is enabled.
+            *result = 17179869184ULL;
+            break;
+        case F2FS_SUPER_MAGIC:
+            // Formula is from https://www.kernel.org/doc/Documentation/filesystems/f2fs.txt
+            // 4KB * (923 + 2 * 1018 + 2 * 1018 * 1018 + 1018 * 1018 * 1018) := 3.94TB.
+            *result = 4329690886144ULL;
+            break;
+        case MSDOS_SUPER_MAGIC:
+            // 4GB-1, which we want aligned to the block size.
+            *result = 4294967295;
+            *result -= (*result % writer->block_size());
+            break;
+        default:
+            LOG(ERROR) << "Unknown file system type: " << writer->fs_type();
+            break;
+    }
+
+    // Close and delete the temporary file.
+    writer = nullptr;
+    unlink(file_path.c_str());
+
+    return FiemapStatus::Ok();
+}
+
+// Given a SplitFiemap, this returns a device path that will work during first-
+// stage init (i.e., its path can be found by InitRequiredDevices).
+std::string GetDevicePathForFile(SplitFiemap* file) {
+    auto bdev_path = file->bdev_path();
+
+    struct stat userdata, given;
+    if (!stat(bdev_path.c_str(), &given) && !stat(kUserdataDevice, &userdata)) {
+        if (S_ISBLK(given.st_mode) && S_ISBLK(userdata.st_mode) &&
+            given.st_rdev == userdata.st_rdev) {
+            return kUserdataDevice;
+        }
+    }
+    return bdev_path;
+}
+
+std::string JoinPaths(const std::string& dir, const std::string& file) {
+    if (android::base::EndsWith(dir, "/")) {
+        return dir + file;
+    }
+    return dir + "/" + file;
+}
+
+bool F2fsPinBeforeAllocate(int file_fd, bool* supported) {
+    struct stat st;
+    if (fstat(file_fd, &st) < 0) {
+        PLOG(ERROR) << "stat failed";
+        return false;
+    }
+    std::string bdev;
+    if (!BlockDeviceToName(major(st.st_dev), minor(st.st_dev), &bdev)) {
+        LOG(ERROR) << "Failed to get block device name for " << major(st.st_dev) << ":"
+                   << minor(st.st_dev);
+        return false;
+    }
+
+    std::string contents;
+    std::string feature_file = "/sys/fs/f2fs/" + bdev + "/features";
+    if (!android::base::ReadFileToString(feature_file, &contents)) {
+        PLOG(ERROR) << "read failed: " << feature_file;
+        return false;
+    }
+    contents = android::base::Trim(contents);
+
+    auto features = android::base::Split(contents, ", ");
+    auto iter = std::find(features.begin(), features.end(), "pin_file"s);
+    *supported = (iter != features.end());
+    return true;
+}
+
+bool BlockDeviceToName(uint32_t major, uint32_t minor, std::string* bdev_name) {
+    // The symlinks in /sys/dev/block point to the block device node under /sys/device/..
+    // The directory name in the target corresponds to the name of the block device. We use
+    // that to extract the block device name.
+    // e.g for block device name 'ram0', there exists a symlink named '1:0' in /sys/dev/block as
+    // follows.
+    //    1:0 -> ../../devices/virtual/block/ram0
+    std::string sysfs_path = ::android::base::StringPrintf("/sys/dev/block/%u:%u", major, minor);
+    std::string sysfs_bdev;
+
+    if (!::android::base::Readlink(sysfs_path, &sysfs_bdev)) {
+        PLOG(ERROR) << "Failed to read link at: " << sysfs_path;
+        return false;
+    }
+
+    *bdev_name = ::android::base::Basename(sysfs_bdev);
+    // Paranoid sanity check to make sure we just didn't get the
+    // input in return as-is.
+    if (sysfs_bdev == *bdev_name) {
+        LOG(ERROR) << "Malformed symlink for block device: " << sysfs_bdev;
+        return false;
+    }
+
+    return true;
+}
+
+bool FilesystemHasReliablePinning(const std::string& file, bool* supported) {
+    struct statfs64 sfs;
+    if (statfs64(file.c_str(), &sfs)) {
+        PLOG(ERROR) << "statfs failed: " << file;
+        return false;
+    }
+    if (sfs.f_type != F2FS_SUPER_MAGIC) {
+        *supported = true;
+        return true;
+    }
+
+    unique_fd fd(open(file.c_str(), O_RDONLY | O_CLOEXEC));
+    if (fd < 0) {
+        PLOG(ERROR) << "open failed: " << file;
+        return false;
+    }
+    return F2fsPinBeforeAllocate(fd, supported);
+}
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfiemap/utility.h b/fs_mgr/libfiemap/utility.h
new file mode 100644
index 0000000..4c0bc2b
--- /dev/null
+++ b/fs_mgr/libfiemap/utility.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include <string>
+
+#include <libfiemap/split_fiemap_writer.h>
+
+namespace android {
+namespace fiemap {
+
+// Given a file that will be created, determine the maximum size its containing
+// filesystem allows. Note this is a theoretical maximum size; free space is
+// ignored entirely.
+FiemapStatus DetermineMaximumFileSize(const std::string& file_path, uint64_t* result);
+
+// Given a SplitFiemap, this returns a device path that will work during first-
+// stage init (i.e., its path can be found by InitRequiredDevices).
+std::string GetDevicePathForFile(android::fiemap::SplitFiemap* file);
+
+// Combine two path components into a single path.
+std::string JoinPaths(const std::string& dir, const std::string& file);
+
+// Given a file within an F2FS filesystem, return whether or not the filesystem
+// supports the "pin_file" feature, which requires pinning before fallocation.
+bool F2fsPinBeforeAllocate(int file_fd, bool* supported);
+
+// Given a major/minor device number, return its canonical name such that
+// /dev/block/<name> resolves to the device.
+bool BlockDeviceToName(uint32_t major, uint32_t minor, std::string* bdev_name);
+
+// This is the same as F2fsPinBeforeAllocate, however, it will return true
+// (and supported = true) for non-f2fs filesystems. It is intended to be used
+// in conjunction with ImageManager to reject image requests for reliable use
+// cases (such as snapshots or adb remount).
+bool FilesystemHasReliablePinning(const std::string& file, bool* supported);
+
+}  // namespace fiemap
+}  // namespace android
diff --git a/fs_mgr/libfs_avb/Android.bp b/fs_mgr/libfs_avb/Android.bp
index 414a186..8fb9697 100644
--- a/fs_mgr/libfs_avb/Android.bp
+++ b/fs_mgr/libfs_avb/Android.bp
@@ -31,17 +31,16 @@
     static_libs: [
         "libavb",
         "libdm",
+        "libgsi",
         "libfstab",
     ],
     export_static_lib_headers: [
         "libfstab",
     ],
     shared_libs: [
+        "libbase",
         "libcrypto",
     ],
-    header_libs: [
-        "libbase_headers",
-    ],
     target: {
         darwin: {
             enabled: false,
@@ -123,6 +122,7 @@
 cc_test {
     name: "libfs_avb_device_test",
     test_suites: ["device-tests"],
+    require_root: true,
     static_libs: [
         "libavb",
         "libdm",
diff --git a/fs_mgr/libfs_avb/fs_avb.cpp b/fs_mgr/libfs_avb/fs_avb.cpp
index c4d7511..5d504ab 100644
--- a/fs_mgr/libfs_avb/fs_avb.cpp
+++ b/fs_mgr/libfs_avb/fs_avb.cpp
@@ -22,6 +22,7 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 
+#include <algorithm>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -32,6 +33,7 @@
 #include <android-base/strings.h>
 #include <libavb/libavb.h>
 #include <libdm/dm.h>
+#include <libgsi/libgsi.h>
 
 #include "avb_ops.h"
 #include "avb_util.h"
@@ -265,14 +267,28 @@
     return avb_handle;
 }
 
-AvbUniquePtr AvbHandle::LoadAndVerifyVbmeta(const FstabEntry& fstab_entry) {
-    if (fstab_entry.avb_keys.empty()) {
+static bool IsAvbPermissive() {
+    if (IsDeviceUnlocked()) {
+        // Manually putting a file under metadata partition can enforce AVB verification.
+        if (!access(DSU_METADATA_PREFIX "avb_enforce", F_OK)) {
+            LINFO << "Enforcing AVB verification when the device is unlocked";
+            return false;
+        }
+        return true;
+    }
+    return false;
+}
+
+AvbUniquePtr AvbHandle::LoadAndVerifyVbmeta(const FstabEntry& fstab_entry,
+                                            const std::vector<std::string>& preload_avb_key_blobs) {
+    // At least one of the following should be provided for public key matching.
+    if (preload_avb_key_blobs.empty() && fstab_entry.avb_keys.empty()) {
         LERROR << "avb_keys=/path/to/key(s) is missing for " << fstab_entry.mount_point;
         return nullptr;
     }
 
     // Binds allow_verification_error and rollback_protection to device unlock state.
-    bool allow_verification_error = IsDeviceUnlocked();
+    bool allow_verification_error = IsAvbPermissive();
     bool rollback_protection = !allow_verification_error;
 
     std::string public_key_data;
@@ -308,7 +324,36 @@
             return nullptr;
     }
 
-    if (!ValidatePublicKeyBlob(public_key_data, Split(fstab_entry.avb_keys, ":"))) {
+    bool public_key_match = false;
+    // Performs key matching for preload_avb_key_blobs first, if it is present.
+    if (!public_key_data.empty() && !preload_avb_key_blobs.empty()) {
+        if (std::find(preload_avb_key_blobs.begin(), preload_avb_key_blobs.end(),
+                      public_key_data) != preload_avb_key_blobs.end()) {
+            public_key_match = true;
+        }
+    }
+    // Performs key matching for fstab_entry.avb_keys if necessary.
+    // Note that it is intentional to match both preload_avb_key_blobs and fstab_entry.avb_keys.
+    // Some keys might only be availble before init chroots into /system, e.g., /avb/key1
+    // in the first-stage ramdisk, while other keys might only be available after the chroot,
+    // e.g., /system/etc/avb/key2.
+    if (!public_key_data.empty() && !public_key_match) {
+        // fstab_entry.avb_keys might be either a directory containing multiple keys,
+        // or a string indicating multiple keys separated by ':'.
+        std::vector<std::string> allowed_avb_keys;
+        auto list_avb_keys_in_dir = ListFiles(fstab_entry.avb_keys);
+        if (list_avb_keys_in_dir.ok()) {
+            std::sort(list_avb_keys_in_dir->begin(), list_avb_keys_in_dir->end());
+            allowed_avb_keys = *list_avb_keys_in_dir;
+        } else {
+            allowed_avb_keys = Split(fstab_entry.avb_keys, ":");
+        }
+        if (ValidatePublicKeyBlob(public_key_data, allowed_avb_keys)) {
+            public_key_match = true;
+        }
+    }
+
+    if (!public_key_match) {
         avb_handle->status_ = AvbHandleStatus::kVerificationError;
         LWARNING << "Found unknown public key used to sign " << fstab_entry.mount_point;
         if (!allow_verification_error) {
@@ -332,15 +377,15 @@
     return LoadAndVerifyVbmeta("vbmeta", fs_mgr_get_slot_suffix(), fs_mgr_get_other_slot_suffix(),
                                {} /* expected_public_key, already checked by bootloader */,
                                HashAlgorithm::kSHA256,
-                               IsDeviceUnlocked(), /* allow_verification_error */
-                               true,               /* load_chained_vbmeta */
+                               IsAvbPermissive(), /* allow_verification_error */
+                               true,              /* load_chained_vbmeta */
                                false, /* rollback_protection, already checked by bootloader */
                                nullptr /* custom_device_path */);
 }
 
 // TODO(b/128807537): removes this function.
 AvbUniquePtr AvbHandle::Open() {
-    bool is_device_unlocked = IsDeviceUnlocked();
+    bool allow_verification_error = IsAvbPermissive();
 
     AvbUniquePtr avb_handle(new AvbHandle());
     if (!avb_handle) {
@@ -349,8 +394,9 @@
     }
 
     FsManagerAvbOps avb_ops;
-    AvbSlotVerifyFlags flags = is_device_unlocked ? AVB_SLOT_VERIFY_FLAGS_ALLOW_VERIFICATION_ERROR
-                                                  : AVB_SLOT_VERIFY_FLAGS_NONE;
+    AvbSlotVerifyFlags flags = allow_verification_error
+                                       ? AVB_SLOT_VERIFY_FLAGS_ALLOW_VERIFICATION_ERROR
+                                       : AVB_SLOT_VERIFY_FLAGS_NONE;
     AvbSlotVerifyResult verify_result =
             avb_ops.AvbSlotVerify(fs_mgr_get_slot_suffix(), flags, &avb_handle->vbmeta_images_);
 
@@ -373,9 +419,8 @@
             break;
         case AVB_SLOT_VERIFY_RESULT_ERROR_VERIFICATION:
         case AVB_SLOT_VERIFY_RESULT_ERROR_PUBLIC_KEY_REJECTED:
-            if (!is_device_unlocked) {
-                LERROR << "ERROR_VERIFICATION / PUBLIC_KEY_REJECTED isn't allowed "
-                       << "if the device is LOCKED";
+            if (!allow_verification_error) {
+                LERROR << "ERROR_VERIFICATION / PUBLIC_KEY_REJECTED isn't allowed ";
                 return nullptr;
             }
             avb_handle->status_ = AvbHandleStatus::kVerificationError;
diff --git a/fs_mgr/libfs_avb/include/fs_avb/fs_avb.h b/fs_mgr/libfs_avb/include/fs_avb/fs_avb.h
index 521f2d5..4702e68 100644
--- a/fs_mgr/libfs_avb/include/fs_avb/fs_avb.h
+++ b/fs_mgr/libfs_avb/include/fs_avb/fs_avb.h
@@ -85,8 +85,15 @@
     // TODO(bowgotsai): remove Open() and switch to LoadAndVerifyVbmeta().
     static AvbUniquePtr Open();                 // loads inline vbmeta, via libavb.
     static AvbUniquePtr LoadAndVerifyVbmeta();  // loads inline vbmeta.
-    static AvbUniquePtr LoadAndVerifyVbmeta(
-            const FstabEntry& fstab_entry);     // loads offline vbmeta.
+
+    // The caller can specify optional preload_avb_key_blobs for public key matching.
+    // This is mostly for init to preload AVB keys before chroot into /system.
+    // Both preload_avb_key_blobs and fstab_entry.avb_keys (file paths) will be used
+    // for public key matching.
+    static AvbUniquePtr LoadAndVerifyVbmeta(  // loads offline vbmeta.
+            const FstabEntry& fstab_entry,
+            const std::vector<std::string>& preload_avb_key_blobs = {});
+
     static AvbUniquePtr LoadAndVerifyVbmeta(    // loads offline vbmeta.
             const std::string& partition_name, const std::string& ab_suffix,
             const std::string& ab_other_suffix, const std::string& expected_public_key,
diff --git a/fs_mgr/libfs_avb/tests/util_test.cpp b/fs_mgr/libfs_avb/tests/util_test.cpp
index 12b5acb..5c388aa 100644
--- a/fs_mgr/libfs_avb/tests/util_test.cpp
+++ b/fs_mgr/libfs_avb/tests/util_test.cpp
@@ -16,10 +16,12 @@
 
 #include <unistd.h>
 
+#include <algorithm>
 #include <future>
 #include <string>
 #include <thread>
 
+#include <android-base/strings.h>
 #include <base/files/file_util.h>
 
 #include "fs_avb_test_util.h"
@@ -29,6 +31,7 @@
 using android::fs_mgr::BytesToHex;
 using android::fs_mgr::FileWaitMode;
 using android::fs_mgr::HexToBytes;
+using android::fs_mgr::ListFiles;
 using android::fs_mgr::NibbleValue;
 using android::fs_mgr::WaitForFile;
 
@@ -210,4 +213,99 @@
     ASSERT_TRUE(base::DeleteFile(wait_path, false /* resursive */));
 }
 
+TEST(BasicUtilTest, ListFiles) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // Generates dummy files to list.
+    base::FilePath file_path_1 = test_dir.Append("1.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_1, "1", 1));
+    base::FilePath file_path_2 = test_dir.Append("2.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_2, "22", 2));
+    base::FilePath file_path_3 = test_dir.Append("3.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_3, "333", 3));
+
+    // List files for comparison.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_RESULT_OK(result);
+    auto files = result.value();
+    EXPECT_EQ(3UL, files.size());
+    // Sort them offline for comparison.
+    std::sort(files.begin(), files.end());
+    EXPECT_EQ(file_path_1.value(), files[0]);
+    EXPECT_EQ(file_path_2.value(), files[1]);
+    EXPECT_EQ(file_path_3.value(), files[2]);
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
+TEST(BasicUtilTest, ListFilesShouldDiscardSymlink) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // Generates dummy files to list.
+    base::FilePath file_path_1 = test_dir.Append("1.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_1, "1", 1));
+    base::FilePath file_path_2 = test_dir.Append("2.txt");
+    ASSERT_TRUE(base::WriteFile(file_path_2, "22", 2));
+    // Creates a symlink and checks it won't be returned by ListFiles.
+    base::FilePath file_path_3 = test_dir.Append("3.txt");
+    base::FilePath non_existent_target = test_dir.Append("non_existent_target.txt");
+    ASSERT_TRUE(base::CreateSymbolicLink(non_existent_target, file_path_3));
+
+    // List files for comparison.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_RESULT_OK(result);
+    auto files = result.value();
+    EXPECT_EQ(2UL, files.size());  // Should not include the symlink file.
+    // Sort them offline for comparison.
+    std::sort(files.begin(), files.end());
+    EXPECT_EQ(file_path_1.value(), files[0]);
+    EXPECT_EQ(file_path_2.value(), files[1]);
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
+TEST(BasicUtilTest, ListFilesOpenDirFailure) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Generates dummy files to list.
+    base::FilePath no_such_dir = tmp_dir.Append("not_such_dir");
+
+    auto fail = ListFiles(no_such_dir.value());
+    ASSERT_FALSE(fail.ok());
+    EXPECT_EQ(ENOENT, fail.error().code());
+    EXPECT_TRUE(android::base::StartsWith(fail.error().message(), "Failed to opendir: "));
+}
+
+TEST(BasicUtilTest, ListFilesEmptyDir) {
+    // Gets system tmp dir.
+    base::FilePath tmp_dir;
+    ASSERT_TRUE(GetTempDir(&tmp_dir));
+
+    // Creates a test dir for ListFiles testing.
+    base::FilePath test_dir;
+    ASSERT_TRUE(base::CreateTemporaryDirInDir(tmp_dir, "list-file-tests.", &test_dir));
+
+    // List files without sorting.
+    auto result = ListFiles(test_dir.value());
+    ASSERT_RESULT_OK(result);
+    auto files = result.value();
+    EXPECT_EQ(0UL, files.size());
+
+    ASSERT_TRUE(base::DeleteFile(test_dir, true /* resursive */));
+}
+
 }  // namespace fs_avb_host_test
diff --git a/fs_mgr/libfs_avb/util.cpp b/fs_mgr/libfs_avb/util.cpp
index d214b5b..7783d04 100644
--- a/fs_mgr/libfs_avb/util.cpp
+++ b/fs_mgr/libfs_avb/util.cpp
@@ -16,10 +16,13 @@
 
 #include "util.h"
 
+#include <dirent.h>
 #include <sys/ioctl.h>
+#include <sys/types.h>
 
 #include <thread>
 
+#include <android-base/stringprintf.h>
 #include <android-base/unique_fd.h>
 #include <linux/fs.h>
 
@@ -122,5 +125,23 @@
     return ioctl(fd, BLKROSET, &ON) == 0;
 }
 
+Result<std::vector<std::string>> ListFiles(const std::string& dir) {
+    struct dirent* de;
+    std::vector<std::string> files;
+
+    std::unique_ptr<DIR, int (*)(DIR*)> dirp(opendir(dir.c_str()), closedir);
+    if (!dirp) {
+        return ErrnoError() << "Failed to opendir: " << dir;
+    }
+
+    while ((de = readdir(dirp.get()))) {
+        if (de->d_type != DT_REG) continue;
+        std::string full_path = android::base::StringPrintf("%s/%s", dir.c_str(), de->d_name);
+        files.emplace_back(std::move(full_path));
+    }
+
+    return files;
+}
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/libfs_avb/util.h b/fs_mgr/libfs_avb/util.h
index 7763da5..427ab7c 100644
--- a/fs_mgr/libfs_avb/util.h
+++ b/fs_mgr/libfs_avb/util.h
@@ -18,6 +18,7 @@
 
 #include <chrono>
 #include <string>
+#include <vector>
 
 #ifdef HOST_TEST
 #include <base/logging.h>
@@ -25,6 +26,11 @@
 #include <android-base/logging.h>
 #endif
 
+#include <android-base/result.h>
+
+using android::base::ErrnoError;
+using android::base::Result;
+
 #define FS_AVB_TAG "[libfs_avb]"
 
 // Logs a message to kernel
@@ -60,5 +66,8 @@
 
 bool SetBlockDeviceReadOnly(const std::string& blockdev);
 
+// Returns a list of file under the dir, no order is guaranteed.
+Result<std::vector<std::string>> ListFiles(const std::string& dir);
+
 }  // namespace fs_mgr
 }  // namespace android
diff --git a/fs_mgr/liblp/builder.cpp b/fs_mgr/liblp/builder.cpp
index 54350a5..d496466 100644
--- a/fs_mgr/liblp/builder.cpp
+++ b/fs_mgr/liblp/builder.cpp
@@ -253,7 +253,7 @@
     header_.magic = LP_METADATA_HEADER_MAGIC;
     header_.major_version = LP_METADATA_MAJOR_VERSION;
     header_.minor_version = LP_METADATA_MINOR_VERSION_MIN;
-    header_.header_size = sizeof(header_);
+    header_.header_size = sizeof(LpMetadataHeaderV1_0);
     header_.partitions.entry_size = sizeof(LpMetadataPartition);
     header_.extents.entry_size = sizeof(LpMetadataExtent);
     header_.groups.entry_size = sizeof(LpMetadataPartitionGroup);
@@ -264,6 +264,12 @@
     geometry_ = metadata.geometry;
     block_devices_ = metadata.block_devices;
 
+    // Bump the version as necessary to copy any newer fields.
+    if (metadata.header.minor_version >= LP_METADATA_VERSION_FOR_EXPANDED_HEADER) {
+        RequireExpandedMetadataHeader();
+        header_.flags = metadata.header.flags;
+    }
+
     for (const auto& group : metadata.groups) {
         std::string group_name = GetPartitionGroupName(group);
         if (!AddGroup(group_name, group.maximum_size)) {
@@ -846,7 +852,7 @@
             return nullptr;
         }
 
-        if (partition->attributes() & LP_PARTITION_ATTR_UPDATED) {
+        if (partition->attributes() & LP_PARTITION_ATTRIBUTE_MASK_V1) {
             static const uint16_t kMinVersion = LP_METADATA_VERSION_FOR_UPDATED_ATTR;
             metadata->header.minor_version = std::max(metadata->header.minor_version, kMinVersion);
         }
@@ -883,6 +889,14 @@
     return metadata;
 }
 
+void MetadataBuilder::RequireExpandedMetadataHeader() {
+    if (header_.minor_version >= LP_METADATA_VERSION_FOR_EXPANDED_HEADER) {
+        return;
+    }
+    header_.minor_version = LP_METADATA_VERSION_FOR_EXPANDED_HEADER;
+    header_.header_size = sizeof(LpMetadataHeaderV1_2);
+}
+
 uint64_t MetadataBuilder::AllocatableSpace() const {
     uint64_t total_size = 0;
     for (const auto& block_device : block_devices_) {
@@ -1111,6 +1125,11 @@
     auto_slot_suffixing_ = true;
 }
 
+void MetadataBuilder::SetVirtualABDeviceFlag() {
+    RequireExpandedMetadataHeader();
+    header_.flags |= LP_HEADER_FLAG_VIRTUAL_AB_DEVICE;
+}
+
 bool MetadataBuilder::IsABDevice() {
     return !IPropertyFetcher::GetInstance()->GetProperty("ro.boot.slot_suffix", "").empty();
 }
diff --git a/fs_mgr/liblp/builder_test.cpp b/fs_mgr/liblp/builder_test.cpp
index a67ffa7..ca8df61 100644
--- a/fs_mgr/liblp/builder_test.cpp
+++ b/fs_mgr/liblp/builder_test.cpp
@@ -352,6 +352,7 @@
     EXPECT_EQ(header.magic, LP_METADATA_HEADER_MAGIC);
     EXPECT_EQ(header.major_version, LP_METADATA_MAJOR_VERSION);
     EXPECT_EQ(header.minor_version, LP_METADATA_MINOR_VERSION_MIN);
+    EXPECT_EQ(header.header_size, sizeof(LpMetadataHeaderV1_0));
 
     ASSERT_EQ(exported->partitions.size(), 2);
     ASSERT_EQ(exported->extents.size(), 3);
@@ -917,3 +918,22 @@
                                       std::vector<Interval>{Interval(0, 100, 150)})
                           .size());
 }
+
+TEST_F(BuilderTest, ExpandedHeader) {
+    unique_ptr<MetadataBuilder> builder = MetadataBuilder::New(1024 * 1024, 1024, 2);
+    ASSERT_NE(builder, nullptr);
+
+    builder->RequireExpandedMetadataHeader();
+
+    unique_ptr<LpMetadata> exported = builder->Export();
+    ASSERT_NE(exported, nullptr);
+    EXPECT_EQ(exported->header.header_size, sizeof(LpMetadataHeaderV1_2));
+
+    exported->header.flags = 0x5e5e5e5e;
+
+    builder = MetadataBuilder::New(*exported.get());
+    exported = builder->Export();
+    ASSERT_NE(exported, nullptr);
+    EXPECT_EQ(exported->header.header_size, sizeof(LpMetadataHeaderV1_2));
+    EXPECT_EQ(exported->header.flags, 0x5e5e5e5e);
+}
diff --git a/fs_mgr/liblp/images.cpp b/fs_mgr/liblp/images.cpp
index 6b842b3..e4d92ca 100644
--- a/fs_mgr/liblp/images.cpp
+++ b/fs_mgr/liblp/images.cpp
@@ -110,7 +110,7 @@
     return ReadFromImageFile(fd);
 }
 
-bool WriteToImageFile(int fd, const LpMetadata& input) {
+bool WriteToImageFile(borrowed_fd fd, const LpMetadata& input) {
     std::string geometry = SerializeGeometry(input.geometry);
     std::string metadata = SerializeMetadata(input);
 
diff --git a/fs_mgr/liblp/images.h b/fs_mgr/liblp/images.h
index a284d2e..88e5882 100644
--- a/fs_mgr/liblp/images.h
+++ b/fs_mgr/liblp/images.h
@@ -29,8 +29,6 @@
 // Helper function to serialize geometry and metadata to a normal file, for
 // flashing or debugging.
 std::unique_ptr<LpMetadata> ReadFromImageFile(int fd);
-bool WriteToImageFile(const char* file, const LpMetadata& metadata);
-bool WriteToImageFile(int fd, const LpMetadata& metadata);
 
 // We use an object to build the image file since it requires that data
 // pointers be held alive until the sparse file is destroyed. It's easier
diff --git a/fs_mgr/liblp/include/liblp/builder.h b/fs_mgr/liblp/include/liblp/builder.h
index 1e9d636..f7738fb 100644
--- a/fs_mgr/liblp/include/liblp/builder.h
+++ b/fs_mgr/liblp/include/liblp/builder.h
@@ -145,6 +145,7 @@
     std::vector<std::unique_ptr<Extent>> extents_;
     uint32_t attributes_;
     uint64_t size_;
+    bool disabled_;
 };
 
 // An interval in the metadata. This is similar to a LinearExtent with one difference.
@@ -318,6 +319,8 @@
 
     // Set the LP_METADATA_AUTO_SLOT_SUFFIXING flag.
     void SetAutoSlotSuffixing();
+    // Set the LP_HEADER_FLAG_VIRTUAL_AB_DEVICE flag.
+    void SetVirtualABDeviceFlag();
 
     // If set, checks for slot suffixes will be ignored internally.
     void IgnoreSlotSuffixing();
@@ -325,6 +328,10 @@
     bool GetBlockDeviceInfo(const std::string& partition_name, BlockDeviceInfo* info) const;
     bool UpdateBlockDeviceInfo(const std::string& partition_name, const BlockDeviceInfo& info);
 
+    // Require the expanded metadata header. This is exposed for testing, and
+    // is normally only called as needed by other methods.
+    void RequireExpandedMetadataHeader();
+
     // Attempt to preserve the named partitions from an older metadata. If this
     // is not possible (for example, the block device list has changed) then
     // false is returned.
diff --git a/fs_mgr/liblp/include/liblp/liblp.h b/fs_mgr/liblp/include/liblp/liblp.h
index cd860cd..04f8987 100644
--- a/fs_mgr/liblp/include/liblp/liblp.h
+++ b/fs_mgr/liblp/include/liblp/liblp.h
@@ -76,12 +76,15 @@
 // supported). It is a format specifically for storing only metadata.
 bool IsEmptySuperImage(const std::string& file);
 
-// Read/Write logical partition metadata to an image file, for diagnostics or
-// flashing. If no partition images are specified, the file will be in the
-// empty format.
+// Read/Write logical partition metadata and contents to an image file, for
+// flashing.
 bool WriteToImageFile(const std::string& file, const LpMetadata& metadata, uint32_t block_size,
                       const std::map<std::string, std::string>& images, bool sparsify);
+
+// Read/Write logical partition metadata to an image file, for producing a
+// super_empty.img (for fastboot wipe-super/update-super) or for diagnostics.
 bool WriteToImageFile(const std::string& file, const LpMetadata& metadata);
+bool WriteToImageFile(android::base::borrowed_fd fd, const LpMetadata& metadata);
 std::unique_ptr<LpMetadata> ReadFromImageFile(const std::string& image_file);
 std::unique_ptr<LpMetadata> ReadFromImageBlob(const void* data, size_t bytes);
 
diff --git a/fs_mgr/liblp/include/liblp/metadata_format.h b/fs_mgr/liblp/include/liblp/metadata_format.h
index 6e928b4..41d8b0c 100644
--- a/fs_mgr/liblp/include/liblp/metadata_format.h
+++ b/fs_mgr/liblp/include/liblp/metadata_format.h
@@ -40,11 +40,14 @@
 /* Current metadata version. */
 #define LP_METADATA_MAJOR_VERSION 10
 #define LP_METADATA_MINOR_VERSION_MIN 0
-#define LP_METADATA_MINOR_VERSION_MAX 1
+#define LP_METADATA_MINOR_VERSION_MAX 2
 
 /* Metadata version needed to use the UPDATED partition attribute. */
 #define LP_METADATA_VERSION_FOR_UPDATED_ATTR 1
 
+/* Metadata version needed for the new expanded header struct. */
+#define LP_METADATA_VERSION_FOR_EXPANDED_HEADER 2
+
 /* Attributes for the LpMetadataPartition::attributes field.
  *
  * READONLY - The partition should not be considered writable. When used with
@@ -69,13 +72,17 @@
  */
 #define LP_PARTITION_ATTR_UPDATED (1 << 2)
 
+/* This flag marks a partition as disabled. It should not be used or mapped. */
+#define LP_PARTITION_ATTR_DISABLED (1 << 3)
+
 /* Mask that defines all valid attributes. When changing this, make sure to
  * update ParseMetadata().
  */
 #define LP_PARTITION_ATTRIBUTE_MASK_V0 \
     (LP_PARTITION_ATTR_READONLY | LP_PARTITION_ATTR_SLOT_SUFFIXED)
-#define LP_PARTITION_ATTRIBUTE_MASK_V1 (LP_PARTITION_ATTRIBUTE_MASK_V0 | LP_PARTITION_ATTR_UPDATED)
-#define LP_PARTITION_ATTRIBUTE_MASK LP_PARTITION_ATTRIBUTE_MASK_V1
+#define LP_PARTITION_ATTRIBUTE_MASK_V1 (LP_PARTITION_ATTR_UPDATED | LP_PARTITION_ATTR_DISABLED)
+#define LP_PARTITION_ATTRIBUTE_MASK \
+    (LP_PARTITION_ATTRIBUTE_MASK_V0 | LP_PARTITION_ATTRIBUTE_MASK_V1)
 
 /* Default name of the physical partition that holds logical partition entries.
  * The layout of this partition will look like:
@@ -212,8 +219,27 @@
     LpMetadataTableDescriptor groups;
     /* 116: Block device table. */
     LpMetadataTableDescriptor block_devices;
+
+    /* Everything past here is header version 1.2+, and is only included if
+     * needed. When liblp supporting >= 1.2 reads a < 1.2 header, it must
+     * zero these additional fields.
+     */
+
+    /* 128: See LP_HEADER_FLAG_ constants for possible values. Header flags are
+     * independent of the version number and intended to be informational only.
+     * New flags can be added without bumping the version.
+     */
+    uint32_t flags;
+
+    /* 132: Reserved (zero), pad to 256 bytes. */
+    uint8_t reserved[124];
 } __attribute__((packed)) LpMetadataHeader;
 
+/* This device uses Virtual A/B. Note that on retrofit devices, the expanded
+ * header may not be present.
+ */
+#define LP_HEADER_FLAG_VIRTUAL_AB_DEVICE 0x1
+
 /* This struct defines a logical partition entry, similar to what would be
  * present in a GUID Partition Table.
  */
@@ -351,6 +377,25 @@
  */
 #define LP_BLOCK_DEVICE_SLOT_SUFFIXED (1 << 0)
 
+/* For ease of writing compatibility checks, the original metadata header is
+ * preserved below, and typedefs are provided for the current version.
+ */
+typedef struct LpMetadataHeaderV1_0 {
+    uint32_t magic;
+    uint16_t major_version;
+    uint16_t minor_version;
+    uint32_t header_size;
+    uint8_t header_checksum[32];
+    uint32_t tables_size;
+    uint8_t tables_checksum[32];
+    LpMetadataTableDescriptor partitions;
+    LpMetadataTableDescriptor extents;
+    LpMetadataTableDescriptor groups;
+    LpMetadataTableDescriptor block_devices;
+} __attribute__((packed)) LpMetadataHeaderV1_0;
+
+typedef LpMetadataHeader LpMetadataHeaderV1_2;
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/fs_mgr/liblp/io_test.cpp b/fs_mgr/liblp/io_test.cpp
index 22f6746..e67fb33 100644
--- a/fs_mgr/liblp/io_test.cpp
+++ b/fs_mgr/liblp/io_test.cpp
@@ -372,7 +372,7 @@
     // Compute the maximum number of partitions we can fit in 512 bytes of
     // metadata. By default there is the header, one partition group, and a
     // block device entry.
-    static const size_t kMaxPartitionTableSize = kMetadataSize - sizeof(LpMetadataHeader) -
+    static const size_t kMaxPartitionTableSize = kMetadataSize - sizeof(LpMetadataHeaderV1_0) -
                                                  sizeof(LpMetadataPartitionGroup) -
                                                  sizeof(LpMetadataBlockDevice);
     size_t max_partitions = kMaxPartitionTableSize / sizeof(LpMetadataPartition);
@@ -742,3 +742,28 @@
     ASSERT_GE(metadata->partitions.size(), 1);
     ASSERT_NE(metadata->partitions[0].attributes & LP_PARTITION_ATTR_UPDATED, 0);
 }
+
+TEST_F(LiblpTest, ReadExpandedHeader) {
+    unique_ptr<MetadataBuilder> builder = CreateDefaultBuilder();
+    ASSERT_NE(builder, nullptr);
+    ASSERT_TRUE(AddDefaultPartitions(builder.get()));
+
+    builder->RequireExpandedMetadataHeader();
+
+    unique_fd fd = CreateFakeDisk();
+    ASSERT_GE(fd, 0);
+
+    DefaultPartitionOpener opener(fd);
+
+    // Export and flash.
+    unique_ptr<LpMetadata> exported = builder->Export();
+    ASSERT_NE(exported, nullptr);
+    exported->header.flags = 0x5e5e5e5e;
+    ASSERT_TRUE(FlashPartitionTable(opener, "super", *exported.get()));
+
+    unique_ptr<LpMetadata> imported = ReadMetadata(opener, "super", 0);
+    ASSERT_NE(imported, nullptr);
+    EXPECT_EQ(imported->header.header_size, sizeof(LpMetadataHeaderV1_2));
+    EXPECT_EQ(imported->header.header_size, exported->header.header_size);
+    EXPECT_EQ(imported->header.flags, exported->header.flags);
+}
diff --git a/fs_mgr/liblp/reader.cpp b/fs_mgr/liblp/reader.cpp
index aecf685..e6fd9f7 100644
--- a/fs_mgr/liblp/reader.cpp
+++ b/fs_mgr/liblp/reader.cpp
@@ -31,6 +31,9 @@
 namespace android {
 namespace fs_mgr {
 
+static_assert(sizeof(LpMetadataHeaderV1_0) == offsetof(LpMetadataHeader, flags),
+              "Incorrect LpMetadataHeader v0 size");
+
 // Helper class for reading descriptors and memory buffers in the same manner.
 class Reader {
   public:
@@ -161,30 +164,59 @@
     return true;
 }
 
-static bool ValidateMetadataHeader(const LpMetadataHeader& header) {
-    // To compute the header's checksum, we have to temporarily set its checksum
-    // field to 0.
-    {
-        LpMetadataHeader temp = header;
-        memset(&temp.header_checksum, 0, sizeof(temp.header_checksum));
-        SHA256(&temp, sizeof(temp), temp.header_checksum);
-        if (memcmp(temp.header_checksum, header.header_checksum, sizeof(temp.header_checksum)) != 0) {
-            LERROR << "Logical partition metadata has invalid checksum.";
-            return false;
-        }
+static bool ReadMetadataHeader(Reader* reader, LpMetadata* metadata) {
+    // Note we zero the struct since older files will result in a partial read.
+    LpMetadataHeader& header = metadata->header;
+    memset(&header, 0, sizeof(header));
+
+    if (!reader->ReadFully(&header, sizeof(LpMetadataHeaderV1_0))) {
+        PERROR << __PRETTY_FUNCTION__ << " read failed";
+        return false;
     }
 
-    // Do basic validation of key metadata bits.
+    // Do basic sanity checks before computing the checksum.
     if (header.magic != LP_METADATA_HEADER_MAGIC) {
         LERROR << "Logical partition metadata has invalid magic value.";
         return false;
     }
-    // Check that the version is compatible.
     if (header.major_version != LP_METADATA_MAJOR_VERSION ||
         header.minor_version > LP_METADATA_MINOR_VERSION_MAX) {
         LERROR << "Logical partition metadata has incompatible version.";
         return false;
     }
+
+    // Validate the header struct size against the reported version.
+    uint32_t expected_struct_size = sizeof(header);
+    if (header.minor_version < LP_METADATA_VERSION_FOR_EXPANDED_HEADER) {
+        expected_struct_size = sizeof(LpMetadataHeaderV1_0);
+    }
+    if (header.header_size != expected_struct_size) {
+        LERROR << "Invalid partition metadata header struct size.";
+        return false;
+    }
+
+    // Read in any remaining fields, the last step needed before checksumming.
+    if (size_t remaining_bytes = header.header_size - sizeof(LpMetadataHeaderV1_0)) {
+        uint8_t* offset = reinterpret_cast<uint8_t*>(&header) + sizeof(LpMetadataHeaderV1_0);
+        if (!reader->ReadFully(offset, remaining_bytes)) {
+            PERROR << __PRETTY_FUNCTION__ << " read failed";
+            return false;
+        }
+    }
+
+    // To compute the header's checksum, we have to temporarily set its checksum
+    // field to 0. Note that we must only compute up to |header_size|.
+    {
+        LpMetadataHeader temp = header;
+        memset(&temp.header_checksum, 0, sizeof(temp.header_checksum));
+        SHA256(&temp, temp.header_size, temp.header_checksum);
+        if (memcmp(temp.header_checksum, header.header_checksum, sizeof(temp.header_checksum)) !=
+            0) {
+            LERROR << "Logical partition metadata has invalid checksum.";
+            return false;
+        }
+    }
+
     if (!ValidateTableBounds(header, header.partitions) ||
         !ValidateTableBounds(header, header.extents) ||
         !ValidateTableBounds(header, header.groups) ||
@@ -215,19 +247,22 @@
                                                  Reader* reader) {
     // First read and validate the header.
     std::unique_ptr<LpMetadata> metadata = std::make_unique<LpMetadata>();
-    if (!reader->ReadFully(&metadata->header, sizeof(metadata->header))) {
-        PERROR << __PRETTY_FUNCTION__ << " read " << sizeof(metadata->header) << "bytes failed";
-        return nullptr;
-    }
-    if (!ValidateMetadataHeader(metadata->header)) {
-        return nullptr;
-    }
+
     metadata->geometry = geometry;
+    if (!ReadMetadataHeader(reader, metadata.get())) {
+        return nullptr;
+    }
 
     LpMetadataHeader& header = metadata->header;
 
-    // Read the metadata payload. Allocation is fallible in case the metadata is
-    // corrupt and has some huge value.
+    // Sanity check the table size.
+    if (header.tables_size > geometry.metadata_max_size) {
+        LERROR << "Invalid partition metadata header table size.";
+        return nullptr;
+    }
+
+    // Read the metadata payload. Allocation is fallible since the table size
+    // could be large.
     std::unique_ptr<uint8_t[]> buffer(new (std::nothrow) uint8_t[header.tables_size]);
     if (!buffer) {
         LERROR << "Out of memory reading logical partition tables.";
@@ -245,11 +280,9 @@
         return nullptr;
     }
 
-    uint32_t valid_attributes = 0;
+    uint32_t valid_attributes = LP_PARTITION_ATTRIBUTE_MASK_V0;
     if (metadata->header.minor_version >= LP_METADATA_VERSION_FOR_UPDATED_ATTR) {
-        valid_attributes = LP_PARTITION_ATTRIBUTE_MASK_V1;
-    } else {
-        valid_attributes = LP_PARTITION_ATTRIBUTE_MASK_V0;
+        valid_attributes |= LP_PARTITION_ATTRIBUTE_MASK_V1;
     }
 
     // ValidateTableSize ensured that |cursor| is valid for the number of
diff --git a/fs_mgr/liblp/writer.cpp b/fs_mgr/liblp/writer.cpp
index 8a983ad..8bf1ee9 100644
--- a/fs_mgr/liblp/writer.cpp
+++ b/fs_mgr/liblp/writer.cpp
@@ -74,17 +74,18 @@
 
     // Compute header checksum.
     memset(header.header_checksum, 0, sizeof(header.header_checksum));
-    SHA256(&header, sizeof(header), header.header_checksum);
+    SHA256(&header, header.header_size, header.header_checksum);
 
     std::string header_blob =
-            std::string(reinterpret_cast<const char*>(&metadata.header), sizeof(metadata.header));
+            std::string(reinterpret_cast<const char*>(&header), header.header_size);
     return header_blob + tables;
 }
 
 // Perform sanity checks so we don't accidentally overwrite valid metadata
 // with potentially invalid metadata, or random partition data with metadata.
-static bool ValidateAndSerializeMetadata(const IPartitionOpener& opener, const LpMetadata& metadata,
-                                         const std::string& slot_suffix, std::string* blob) {
+static bool ValidateAndSerializeMetadata([[maybe_unused]] const IPartitionOpener& opener,
+                                         const LpMetadata& metadata, const std::string& slot_suffix,
+                                         std::string* blob) {
     const LpMetadataGeometry& geometry = metadata.geometry;
 
     *blob = SerializeMetadata(metadata);
@@ -128,6 +129,10 @@
                    << block_device.first_logical_sector << " for size " << block_device.size;
             return false;
         }
+
+        // When flashing on the device, check partition sizes. Don't do this on
+        // the host since there is no way to verify.
+#if defined(__ANDROID__)
         BlockDeviceInfo info;
         if (!opener.GetInfo(partition_name, &info)) {
             PERROR << partition_name << ": ioctl";
@@ -138,6 +143,7 @@
                    << block_device.size << ", got " << info.size << ")";
             return false;
         }
+#endif
     }
 
     // Make sure all partition entries reference valid extents.
diff --git a/fs_mgr/libsnapshot/Android.bp b/fs_mgr/libsnapshot/Android.bp
index ba43949..adfee1d 100644
--- a/fs_mgr/libsnapshot/Android.bp
+++ b/fs_mgr/libsnapshot/Android.bp
@@ -24,15 +24,13 @@
     ],
     shared_libs: [
         "libbase",
+        "libcutils",
         "liblog",
         "liblp",
     ],
     static_libs: [
-        "libcutils",
         "libdm",
-        "libfs_mgr",
         "libfstab",
-        "liblp",
         "update_metadata-protos",
     ],
     whole_static_libs: [
@@ -72,9 +70,11 @@
     name: "libsnapshot_sources",
     srcs: [
         "android/snapshot/snapshot.proto",
+        "device_info.cpp",
         "snapshot.cpp",
         "snapshot_metadata_updater.cpp",
         "partition_cow_creator.cpp",
+        "return.cpp",
         "utility.cpp",
     ],
 }
@@ -92,8 +92,18 @@
         "libsnapshot_hal_deps",
     ],
     srcs: [":libsnapshot_sources"],
-    whole_static_libs: [
-        "libfiemap_binder",
+    static_libs: [
+        "libfs_mgr_binder"
+    ],
+
+    shared_libs: [
+        // TODO(b/148818798): remove when parent bug is fixed
+        "libutilscallstack",
+    ],
+    cflags: [
+        "-g",
+        "-O0",
+        "-DLIBSNAPSHOT_USE_CALLSTACK",
     ],
 }
 
@@ -102,8 +112,8 @@
     defaults: ["libsnapshot_defaults"],
     srcs: [":libsnapshot_sources"],
     recovery_available: true,
-    whole_static_libs: [
-        "libfiemap_passthrough",
+    static_libs: [
+        "libfs_mgr",
     ],
 }
 
@@ -115,40 +125,94 @@
     ],
     srcs: [":libsnapshot_sources"],
     recovery_available: true,
-    whole_static_libs: [
-        "libfiemap_passthrough",
+    static_libs: [
+        "libfs_mgr",
     ],
 }
 
-cc_test {
-    name: "libsnapshot_test",
+cc_library_static {
+    name: "libsnapshot_test_helpers",
     defaults: ["libsnapshot_defaults"],
+    export_include_dirs: [
+        "include_test",
+    ],
     srcs: [
-        "snapshot_test.cpp",
-        "partition_cow_creator_test.cpp",
-        "snapshot_metadata_updater_test.cpp",
+        "android/snapshot/snapshot.proto",
         "test_helpers.cpp",
     ],
     shared_libs: [
-        "libbinder",
-        "libhidlbase",
-        "libprotobuf-cpp-lite",
-        "libutils",
-    ],
-    static_libs: [
-        "android.hardware.boot@1.0",
         "android.hardware.boot@1.1",
-        "libcrypto_static",
-        "libfs_mgr",
-        "libgmock",
-        "liblp",
-        "libsnapshot",
-        "libsparse",
-        "libz",
+        "libcrypto",
+    ],
+    export_shared_lib_headers: [
+        "android.hardware.boot@1.1",
     ],
     header_libs: [
         "libstorage_literals_headers",
     ],
+    export_header_lib_headers: [
+        "libstorage_literals_headers",
+    ],
+    static_libs: [
+        "libfs_mgr",
+        "libgmock",
+        "libgtest",
+    ],
+}
+
+cc_defaults {
+    name: "libsnapshot_test_defaults",
+    defaults: ["libsnapshot_defaults"],
+    srcs: [
+        "partition_cow_creator_test.cpp",
+        "snapshot_metadata_updater_test.cpp",
+        "snapshot_test.cpp",
+    ],
+    shared_libs: [
+        "android.hardware.boot@1.0",
+        "android.hardware.boot@1.1",
+        "libbinder",
+        "libcrypto",
+        "libhidlbase",
+        "libprotobuf-cpp-lite",
+        "libsparse",
+        "libutils",
+        "libz",
+
+        // TODO(b/148818798): remove when parent bug is fixed
+        "libutilscallstack",
+    ],
+    static_libs: [
+        "libfs_mgr",
+        "libgsi",
+        "libgmock",
+        "liblp",
+        "libsnapshot",
+        "libsnapshot_test_helpers",
+    ],
+    header_libs: [
+        "libstorage_literals_headers",
+    ],
+    test_suites: [
+        "vts-core",
+        "device-tests"
+    ],
+    test_min_api_level: 29,
+    auto_gen_config: true,
+    require_root: true,
+}
+
+cc_test {
+    name: "vts_libsnapshot_test",
+    defaults: ["libsnapshot_test_defaults"],
+}
+
+cc_test {
+    name: "vts_libsnapshot_test_presubmit",
+    defaults: ["libsnapshot_test_defaults"],
+    cppflags: [
+        "-DSKIP_TEST_IN_PRESUBMIT",
+    ],
 }
 
 cc_binary {
@@ -158,8 +222,6 @@
     ],
     static_libs: [
         "libdm",
-        "libext2_uuid",
-        "libfiemap_binder",
         "libfstab",
         "libsnapshot",
     ],
@@ -168,14 +230,17 @@
         "android.hardware.boot@1.1",
         "libbase",
         "libbinder",
-        "libbinderthreadstate",
+        "libext2_uuid",
         "libext4_utils",
-        "libfs_mgr",
+        "libfs_mgr_binder",
         "libhidlbase",
         "liblog",
         "liblp",
         "libprotobuf-cpp-lite",
         "libutils",
+
+        // TODO(b/148818798): remove when parent bug is fixed.
+        "libutilscallstack",
     ],
     init_rc: [
         "snapshotctl.rc",
diff --git a/fs_mgr/libsnapshot/OWNERS b/fs_mgr/libsnapshot/OWNERS
index 0cfa7e4..801c446 100644
--- a/fs_mgr/libsnapshot/OWNERS
+++ b/fs_mgr/libsnapshot/OWNERS
@@ -1,2 +1,3 @@
+balsini@google.com
 dvander@google.com
 elsk@google.com
diff --git a/fs_mgr/libsnapshot/android/snapshot/snapshot.proto b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
index 629c3a4..a3a518d 100644
--- a/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
+++ b/fs_mgr/libsnapshot/android/snapshot/snapshot.proto
@@ -85,3 +85,49 @@
     // This is non-zero when |state| == MERGING or MERGE_COMPLETED.
     uint64 metadata_sectors = 8;
 }
+
+// Next: 8
+enum UpdateState {
+    // No update or merge is in progress.
+    None = 0;
+
+    // An update is applying; snapshots may already exist.
+    Initiated = 1;
+
+    // An update is pending, but has not been successfully booted yet.
+    Unverified = 2;
+
+    // The kernel is merging in the background.
+    Merging = 3;
+
+    // Post-merge cleanup steps could not be completed due to a transient
+    // error, but the next reboot will finish any pending operations.
+    MergeNeedsReboot = 4;
+
+    // Merging is complete, and needs to be acknowledged.
+    MergeCompleted = 5;
+
+    // Merging failed due to an unrecoverable error.
+    MergeFailed = 6;
+
+    // The update was implicitly cancelled, either by a rollback or a flash
+    // operation via fastboot. This state can only be returned by WaitForMerge.
+    Cancelled = 7;
+};
+
+// Next: 5
+message SnapshotUpdateStatus {
+    UpdateState state = 1;
+
+    // Total number of sectors allocated in the COW files before performing the
+    // merge operation.  This field is used to keep track of the total number
+    // of sectors modified to monitor and show the progress of the merge during
+    // an update.
+    uint64 sectors_allocated = 2;
+
+    // Total number of sectors of all the snapshot devices.
+    uint64 total_sectors = 3;
+
+    // Sectors allocated for metadata in all the snapshot devices.
+    uint64 metadata_sectors = 4;
+}
diff --git a/fs_mgr/libsnapshot/device_info.cpp b/fs_mgr/libsnapshot/device_info.cpp
new file mode 100644
index 0000000..0e90100
--- /dev/null
+++ b/fs_mgr/libsnapshot/device_info.cpp
@@ -0,0 +1,124 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "device_info.h"
+
+#include <android-base/logging.h>
+#include <fs_mgr.h>
+#include <fs_mgr_overlayfs.h>
+
+namespace android {
+namespace snapshot {
+
+#ifdef LIBSNAPSHOT_USE_HAL
+using android::hardware::boot::V1_0::BoolResult;
+using android::hardware::boot::V1_0::CommandResult;
+#endif
+
+using namespace std::string_literals;
+
+#ifdef __ANDROID_RECOVERY__
+constexpr bool kIsRecovery = true;
+#else
+constexpr bool kIsRecovery = false;
+#endif
+
+std::string DeviceInfo::GetGsidDir() const {
+    return "ota"s;
+}
+
+std::string DeviceInfo::GetMetadataDir() const {
+    return "/metadata/ota"s;
+}
+
+std::string DeviceInfo::GetSlotSuffix() const {
+    return fs_mgr_get_slot_suffix();
+}
+
+std::string DeviceInfo::GetOtherSlotSuffix() const {
+    return fs_mgr_get_other_slot_suffix();
+}
+
+const android::fs_mgr::IPartitionOpener& DeviceInfo::GetPartitionOpener() const {
+    return opener_;
+}
+
+std::string DeviceInfo::GetSuperDevice(uint32_t slot) const {
+    return fs_mgr_get_super_partition_name(slot);
+}
+
+bool DeviceInfo::IsOverlayfsSetup() const {
+    return fs_mgr_overlayfs_is_setup();
+}
+
+#ifdef LIBSNAPSHOT_USE_HAL
+bool DeviceInfo::EnsureBootHal() {
+    if (!boot_control_) {
+        auto hal = android::hardware::boot::V1_0::IBootControl::getService();
+        if (!hal) {
+            LOG(ERROR) << "Could not find IBootControl HAL";
+            return false;
+        }
+        boot_control_ = android::hardware::boot::V1_1::IBootControl::castFrom(hal);
+        if (!boot_control_) {
+            LOG(ERROR) << "Could not find IBootControl 1.1 HAL";
+            return false;
+        }
+    }
+    return true;
+}
+#endif
+
+bool DeviceInfo::SetBootControlMergeStatus([[maybe_unused]] MergeStatus status) {
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!EnsureBootHal()) {
+        return false;
+    }
+    if (!boot_control_->setSnapshotMergeStatus(status)) {
+        LOG(ERROR) << "Unable to set the snapshot merge status";
+        return false;
+    }
+    return true;
+#else
+    LOG(ERROR) << "HAL support not enabled.";
+    return false;
+#endif
+}
+
+bool DeviceInfo::IsRecovery() const {
+    return kIsRecovery;
+}
+
+bool DeviceInfo::SetSlotAsUnbootable([[maybe_unused]] unsigned int slot) {
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!EnsureBootHal()) {
+        return false;
+    }
+
+    CommandResult result = {};
+    auto cb = [&](CommandResult r) -> void { result = r; };
+    boot_control_->setSlotAsUnbootable(slot, cb);
+    if (!result.success) {
+        LOG(ERROR) << "Error setting slot " << slot << " unbootable: " << result.errMsg;
+        return false;
+    }
+    return true;
+#else
+    LOG(ERROR) << "HAL support not enabled.";
+    return false;
+#endif
+}
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/device_info.h b/fs_mgr/libsnapshot/device_info.h
new file mode 100644
index 0000000..d8d3d91
--- /dev/null
+++ b/fs_mgr/libsnapshot/device_info.h
@@ -0,0 +1,53 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+
+#ifdef LIBSNAPSHOT_USE_HAL
+#include <android/hardware/boot/1.1/IBootControl.h>
+#endif
+#include <liblp/partition_opener.h>
+#include <libsnapshot/snapshot.h>
+
+namespace android {
+namespace snapshot {
+
+class DeviceInfo final : public SnapshotManager::IDeviceInfo {
+    using MergeStatus = android::hardware::boot::V1_1::MergeStatus;
+
+  public:
+    std::string GetGsidDir() const override;
+    std::string GetMetadataDir() const override;
+    std::string GetSlotSuffix() const override;
+    std::string GetOtherSlotSuffix() const override;
+    const android::fs_mgr::IPartitionOpener& GetPartitionOpener() const override;
+    std::string GetSuperDevice(uint32_t slot) const override;
+    bool IsOverlayfsSetup() const override;
+    bool SetBootControlMergeStatus(MergeStatus status) override;
+    bool SetSlotAsUnbootable(unsigned int slot) override;
+    bool IsRecovery() const override;
+
+  private:
+    bool EnsureBootHal();
+
+    android::fs_mgr::PartitionOpener opener_;
+#ifdef LIBSNAPSHOT_USE_HAL
+    android::sp<android::hardware::boot::V1_1::IBootControl> boot_control_;
+#endif
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/dm_snapshot_internals.h b/fs_mgr/libsnapshot/dm_snapshot_internals.h
index 4903de1..fef256d 100644
--- a/fs_mgr/libsnapshot/dm_snapshot_internals.h
+++ b/fs_mgr/libsnapshot/dm_snapshot_internals.h
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#pragma once
+
 #include <stdint.h>
 
 #include <vector>
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h b/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h
new file mode 100644
index 0000000..73450db
--- /dev/null
+++ b/fs_mgr/libsnapshot/include/libsnapshot/auto_device.h
@@ -0,0 +1,42 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <string>
+
+#include <android-base/macros.h>
+
+namespace android {
+namespace snapshot {
+
+// An abstract "device" that will be cleaned up (unmapped, unmounted, etc.) upon
+// destruction.
+struct AutoDevice {
+    virtual ~AutoDevice(){};
+    void Release();
+
+    bool HasDevice() const { return !name_.empty(); }
+
+  protected:
+    AutoDevice(const std::string& name) : name_(name) {}
+    std::string name_;
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(AutoDevice);
+    AutoDevice(AutoDevice&& other) = delete;
+};
+
+}  // namespace snapshot
+}  // namespace android
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/return.h b/fs_mgr/libsnapshot/include/libsnapshot/return.h
new file mode 100644
index 0000000..1f132fa
--- /dev/null
+++ b/fs_mgr/libsnapshot/include/libsnapshot/return.h
@@ -0,0 +1,61 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <stdint.h>
+#include <string.h>
+
+#include <libfiemap/fiemap_status.h>
+
+namespace android::snapshot {
+
+// SnapshotManager functions return either bool or Return objects. "Return" types provides
+// more information about the reason of the failure.
+class Return {
+    using FiemapStatus = android::fiemap::FiemapStatus;
+
+  public:
+    enum class ErrorCode : int32_t {
+        SUCCESS = static_cast<int32_t>(FiemapStatus::ErrorCode::SUCCESS),
+        ERROR = static_cast<int32_t>(FiemapStatus::ErrorCode::ERROR),
+        NEEDS_REBOOT = ERROR + 1,
+        NO_SPACE = static_cast<int32_t>(FiemapStatus::ErrorCode::NO_SPACE),
+    };
+    ErrorCode error_code() const { return error_code_; }
+    bool is_ok() const { return error_code() == ErrorCode::SUCCESS; }
+    operator bool() const { return is_ok(); }
+    // Total required size on /userdata.
+    uint64_t required_size() const { return required_size_; }
+    std::string string() const;
+
+    static Return Ok() { return Return(ErrorCode::SUCCESS); }
+    static Return Error() { return Return(ErrorCode::ERROR); }
+    static Return NoSpace(uint64_t size) { return Return(ErrorCode::NO_SPACE, size); }
+    static Return NeedsReboot() { return Return(ErrorCode::NEEDS_REBOOT); }
+    // Does not set required_size_ properly even when status.error_code() == NO_SPACE.
+    explicit Return(const FiemapStatus& status)
+        : error_code_(FromFiemapStatusErrorCode(status.error_code())), required_size_(0) {}
+
+  private:
+    ErrorCode error_code_;
+    uint64_t required_size_;
+    Return(ErrorCode error_code, uint64_t required_size = 0)
+        : error_code_(error_code), required_size_(required_size) {}
+
+    // FiemapStatus::ErrorCode -> ErrorCode
+    static ErrorCode FromFiemapStatusErrorCode(FiemapStatus::ErrorCode error_code);
+};
+
+}  // namespace android::snapshot
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
index fcaa73a..ed92dd7 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
@@ -19,12 +19,14 @@
 #include <chrono>
 #include <map>
 #include <memory>
+#include <optional>
 #include <ostream>
 #include <string>
 #include <string_view>
 #include <vector>
 
 #include <android-base/unique_fd.h>
+#include <android/snapshot/snapshot.pb.h>
 #include <fs_mgr_dm_linear.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
@@ -32,6 +34,9 @@
 #include <liblp/liblp.h>
 #include <update_engine/update_metadata.pb.h>
 
+#include <libsnapshot/auto_device.h>
+#include <libsnapshot/return.h>
+
 #ifndef FRIEND_TEST
 #define FRIEND_TEST(test_set_name, individual_test) \
     friend class test_set_name##_##individual_test##_Test
@@ -69,34 +74,13 @@
 
 static constexpr const std::string_view kCowGroupName = "cow";
 
-enum class UpdateState : unsigned int {
-    // No update or merge is in progress.
-    None,
+bool SourceCopyOperationIsClone(const chromeos_update_engine::InstallOperation& operation);
 
-    // An update is applying; snapshots may already exist.
-    Initiated,
-
-    // An update is pending, but has not been successfully booted yet.
-    Unverified,
-
-    // The kernel is merging in the background.
-    Merging,
-
-    // Post-merge cleanup steps could not be completed due to a transient
-    // error, but the next reboot will finish any pending operations.
-    MergeNeedsReboot,
-
-    // Merging is complete, and needs to be acknowledged.
-    MergeCompleted,
-
-    // Merging failed due to an unrecoverable error.
-    MergeFailed,
-
-    // The update was implicitly cancelled, either by a rollback or a flash
-    // operation via fastboot. This state can only be returned by WaitForMerge.
-    Cancelled
+enum class CreateResult : unsigned int {
+    ERROR,
+    CREATED,
+    NOT_CREATED,
 };
-std::ostream& operator<<(std::ostream& os, UpdateState state);
 
 class SnapshotManager final {
     using CreateLogicalPartitionParams = android::fs_mgr::CreateLogicalPartitionParams;
@@ -105,6 +89,7 @@
     using MetadataBuilder = android::fs_mgr::MetadataBuilder;
     using DeltaArchiveManifest = chromeos_update_engine::DeltaArchiveManifest;
     using MergeStatus = android::hardware::boot::V1_1::MergeStatus;
+    using FiemapStatus = android::fiemap::FiemapStatus;
 
   public:
     // Dependency injection for testing.
@@ -119,6 +104,8 @@
         virtual const IPartitionOpener& GetPartitionOpener() const = 0;
         virtual bool IsOverlayfsSetup() const = 0;
         virtual bool SetBootControlMergeStatus(MergeStatus status) = 0;
+        virtual bool SetSlotAsUnbootable(unsigned int slot) = 0;
+        virtual bool IsRecovery() const = 0;
     };
 
     ~SnapshotManager();
@@ -129,7 +116,7 @@
     static std::unique_ptr<SnapshotManager> New(IDeviceInfo* device = nullptr);
 
     // This is similar to New(), except designed specifically for first-stage
-    // init.
+    // init or recovery.
     static std::unique_ptr<SnapshotManager> NewForFirstStageMount(IDeviceInfo* device = nullptr);
 
     // Helper function for first-stage init to check whether a SnapshotManager
@@ -148,8 +135,10 @@
     // Mark snapshot writes as having completed. After this, new snapshots cannot
     // be created, and the device must either cancel the OTA (either before
     // rebooting or after rolling back), or merge the OTA.
+    // Before calling this function, all snapshots must be mapped.
     bool FinishedSnapshotWrites();
 
+  private:
     // Initiate a merge on all snapshot devices. This should only be used after an
     // update has been marked successful after booting.
     bool InitiateMerge();
@@ -175,7 +164,29 @@
     //
     //   MergeCompleted indicates that the update has fully completed.
     //   GetUpdateState will return None, and a new update can begin.
-    UpdateState ProcessUpdateState();
+    //
+    // The optional callback allows the caller to periodically check the
+    // progress with GetUpdateState().
+    UpdateState ProcessUpdateState(const std::function<void()>& callback = {});
+
+  public:
+    // Initiate the merge if necessary, then wait for the merge to finish.
+    // See InitiateMerge() and ProcessUpdateState() for details.
+    // Returns:
+    //   - None if no merge to initiate
+    //   - Unverified if called on the source slot
+    //   - MergeCompleted if merge is completed
+    //   - other states indicating an error has occurred
+    UpdateState InitiateMergeAndWait();
+
+    // Wait for the merge if rebooted into the new slot. Does NOT initiate a
+    // merge. If the merge has not been initiated (but should be), wait.
+    // Returns:
+    //   - Return::Ok(): there is no merge or merge finishes
+    //   - Return::NeedsReboot(): merge finishes but need a reboot before
+    //     applying the next update.
+    //   - Return::Error(): other irrecoverable errors
+    Return WaitForMerge();
 
     // Find the status of the current update, if any.
     //
@@ -188,7 +199,7 @@
     // Create necessary COW device / files for OTA clients. New logical partitions will be added to
     // group "cow" in target_metadata. Regions of partitions of current_metadata will be
     // "write-protected" and snapshotted.
-    bool CreateUpdateSnapshots(const DeltaArchiveManifest& manifest);
+    Return CreateUpdateSnapshots(const DeltaArchiveManifest& manifest);
 
     // Map a snapshotted partition for OTA clients to write to. Write-protected regions are
     // determined previously in CreateSnapshots.
@@ -203,11 +214,52 @@
 
     // Perform first-stage mapping of snapshot targets. This replaces init's
     // call to CreateLogicalPartitions when snapshots are present.
-    bool CreateLogicalAndSnapshotPartitions(const std::string& super_device);
+    bool CreateLogicalAndSnapshotPartitions(const std::string& super_device,
+                                            const std::chrono::milliseconds& timeout_ms = {});
+
+    // This method should be called preceding any wipe or flash of metadata or
+    // userdata. It is only valid in recovery or fastbootd, and it ensures that
+    // a merge has been completed.
+    //
+    // When userdata will be wiped or flashed, it is necessary to clean up any
+    // snapshot state. If a merge is in progress, the merge must be finished.
+    // If a snapshot is present but not yet merged, the slot must be marked as
+    // unbootable.
+    //
+    // Returns true on success (or nothing to do), false on failure. The
+    // optional callback fires periodically to query progress via GetUpdateState.
+    bool HandleImminentDataWipe(const std::function<void()>& callback = {});
+
+    // This method is only allowed in recovery and is used as a helper to
+    // initialize the snapshot devices as a requirement to mount a snapshotted
+    // /system in recovery.
+    // This function returns:
+    // - CreateResult::CREATED if snapshot devices were successfully created;
+    // - CreateResult::NOT_CREATED if it was not necessary to create snapshot
+    // devices;
+    // - CreateResult::ERROR if a fatal error occurred, mounting /system should
+    // be aborted.
+    CreateResult RecoveryCreateSnapshotDevices();
 
     // Dump debug information.
     bool Dump(std::ostream& os);
 
+    // Ensure metadata directory is mounted in recovery. When the returned
+    // AutoDevice is destroyed, the metadata directory is automatically
+    // unmounted.
+    // Return nullptr if any failure.
+    // In Android mode, Return an AutoDevice that does nothing
+    // In recovery, return an AutoDevice that does nothing if metadata entry
+    // is not found in fstab.
+    // Note: if this function is called the second time before the AutoDevice returned from the
+    // first call is destroyed, the device will be unmounted when any of these AutoDevices is
+    // destroyed. For example:
+    //   auto a = mgr->EnsureMetadataMounted(); // mounts
+    //   auto b = mgr->EnsureMetadataMounted(); // does nothing
+    //   b.reset() // unmounts
+    //   a.reset() // does nothing
+    std::unique_ptr<AutoDevice> EnsureMetadataMounted();
+
   private:
     FRIEND_TEST(SnapshotTest, CleanFirstStageMount);
     FRIEND_TEST(SnapshotTest, CreateSnapshot);
@@ -218,12 +270,18 @@
     FRIEND_TEST(SnapshotTest, MapPartialSnapshot);
     FRIEND_TEST(SnapshotTest, MapSnapshot);
     FRIEND_TEST(SnapshotTest, Merge);
-    FRIEND_TEST(SnapshotTest, MergeCannotRemoveCow);
     FRIEND_TEST(SnapshotTest, NoMergeBeforeReboot);
     FRIEND_TEST(SnapshotTest, UpdateBootControlHal);
+    FRIEND_TEST(SnapshotUpdateTest, DataWipeAfterRollback);
+    FRIEND_TEST(SnapshotUpdateTest, DataWipeRollbackInRecovery);
+    FRIEND_TEST(SnapshotUpdateTest, FullUpdateFlow);
+    FRIEND_TEST(SnapshotUpdateTest, MergeCannotRemoveCow);
+    FRIEND_TEST(SnapshotUpdateTest, MergeInRecovery);
     FRIEND_TEST(SnapshotUpdateTest, SnapshotStatusFileWithoutCow);
     friend class SnapshotTest;
     friend class SnapshotUpdateTest;
+    friend class FlashAfterUpdateTest;
+    friend class LockTestConsumer;
     friend struct AutoDeleteCowImage;
     friend struct AutoDeleteSnapshot;
     friend struct PartitionCowCreator;
@@ -251,9 +309,6 @@
         LockedFile(const std::string& path, android::base::unique_fd&& fd, int lock_mode)
             : path_(path), fd_(std::move(fd)), lock_mode_(lock_mode) {}
         ~LockedFile();
-
-        const std::string& path() const { return path_; }
-        int fd() const { return fd_; }
         int lock_mode() const { return lock_mode_; }
 
       private:
@@ -261,8 +316,7 @@
         android::base::unique_fd fd_;
         int lock_mode_;
     };
-    std::unique_ptr<LockedFile> OpenFile(const std::string& file, int open_flags, int lock_flags);
-    bool Truncate(LockedFile* file);
+    static std::unique_ptr<LockedFile> OpenFile(const std::string& file, int lock_flags);
 
     // Create a new snapshot record. This creates the backing COW store and
     // persists information needed to map the device. The device can be mapped
@@ -284,7 +338,7 @@
 
     // |name| should be the base partition name (e.g. "system_a"). Create the
     // backing COW image using the size previously passed to CreateSnapshot().
-    bool CreateCowImage(LockedFile* lock, const std::string& name);
+    Return CreateCowImage(LockedFile* lock, const std::string& name);
 
     // Map a snapshot device that was previously created with CreateSnapshot.
     // If a merge was previously initiated, the device-mapper table will have a
@@ -298,7 +352,8 @@
                      std::string* dev_path);
 
     // Map a COW image that was previous created with CreateCowImage.
-    bool MapCowImage(const std::string& name, const std::chrono::milliseconds& timeout_ms);
+    std::optional<std::string> MapCowImage(const std::string& name,
+                                           const std::chrono::milliseconds& timeout_ms);
 
     // Remove the backing copy-on-write image and snapshot states for the named snapshot. The
     // caller is responsible for ensuring that the snapshot is unmapped.
@@ -320,16 +375,24 @@
     // condition was detected and handled.
     bool HandleCancelledUpdate(LockedFile* lock);
 
+    // Helper for HandleCancelledUpdate. Assumes booting from new slot.
+    bool AreAllSnapshotsCancelled(LockedFile* lock);
+
     // Remove artifacts created by the update process, such as snapshots, and
     // set the update state to None.
     bool RemoveAllUpdateState(LockedFile* lock);
 
-    // Interact with /metadata/ota/state.
-    std::unique_ptr<LockedFile> OpenStateFile(int open_flags, int lock_flags);
+    // Interact with /metadata/ota.
+    std::unique_ptr<LockedFile> OpenLock(int lock_flags);
     std::unique_ptr<LockedFile> LockShared();
     std::unique_ptr<LockedFile> LockExclusive();
+    std::string GetLockPath() const;
+
+    // Interact with /metadata/ota/state.
     UpdateState ReadUpdateState(LockedFile* file);
+    SnapshotUpdateStatus ReadSnapshotUpdateStatus(LockedFile* file);
     bool WriteUpdateState(LockedFile* file, UpdateState state);
+    bool WriteSnapshotUpdateStatus(LockedFile* file, const SnapshotUpdateStatus& status);
     std::string GetStateFilePath() const;
 
     // Helpers for merging.
@@ -338,7 +401,19 @@
     bool MarkSnapshotMergeCompleted(LockedFile* snapshot_lock, const std::string& snapshot_name);
     void AcknowledgeMergeSuccess(LockedFile* lock);
     void AcknowledgeMergeFailure();
-    bool IsCancelledSnapshot(const std::string& snapshot_name);
+    std::unique_ptr<LpMetadata> ReadCurrentMetadata();
+
+    enum class MetadataPartitionState {
+        // Partition does not exist.
+        None,
+        // Partition is flashed.
+        Flashed,
+        // Partition is created by OTA client.
+        Updated,
+    };
+    // Helper function to check the state of a partition as described in metadata.
+    MetadataPartitionState GetMetadataPartitionState(const LpMetadata& metadata,
+                                                     const std::string& name);
 
     // Note that these require the name of the device containing the snapshot,
     // which may be the "inner" device. Use GetsnapshotDeviecName().
@@ -366,7 +441,7 @@
     std::string GetSnapshotStatusFilePath(const std::string& name);
 
     std::string GetSnapshotBootIndicatorPath();
-    void RemoveSnapshotBootIndicator();
+    std::string GetRollbackIndicatorPath();
 
     // Return the name of the device holding the "snapshot" or "snapshot-merge"
     // target. This may not be the final device presented via MapSnapshot(), if
@@ -405,18 +480,33 @@
 
     // Helper for CreateUpdateSnapshots.
     // Creates all underlying images, COW partitions and snapshot files. Does not initialize them.
-    bool CreateUpdateSnapshotsInternal(LockedFile* lock, const DeltaArchiveManifest& manifest,
-                                       PartitionCowCreator* cow_creator,
-                                       AutoDeviceList* created_devices,
-                                       std::map<std::string, SnapshotStatus>* all_snapshot_status);
+    Return CreateUpdateSnapshotsInternal(
+            LockedFile* lock, const DeltaArchiveManifest& manifest,
+            PartitionCowCreator* cow_creator, AutoDeviceList* created_devices,
+            std::map<std::string, SnapshotStatus>* all_snapshot_status);
 
     // Initialize snapshots so that they can be mapped later.
     // Map the COW partition and zero-initialize the header.
-    bool InitializeUpdateSnapshots(
+    Return InitializeUpdateSnapshots(
             LockedFile* lock, MetadataBuilder* target_metadata,
             const LpMetadata* exported_target_metadata, const std::string& target_suffix,
             const std::map<std::string, SnapshotStatus>& all_snapshot_status);
 
+    // Unmap all partitions that were mapped by CreateLogicalAndSnapshotPartitions.
+    // This should only be called in recovery.
+    bool UnmapAllPartitions();
+
+    // Sanity check no snapshot overflows. Note that this returns false negatives if the snapshot
+    // overflows, then is remapped and not written afterwards. Hence, the function may only serve
+    // as a sanity check.
+    bool EnsureNoOverflowSnapshot(LockedFile* lock);
+
+    enum class Slot { Unknown, Source, Target };
+    friend std::ostream& operator<<(std::ostream& os, SnapshotManager::Slot slot);
+    Slot GetCurrentSlot();
+
+    std::string ReadUpdateSourceSlotSuffix();
+
     std::string gsid_dir_;
     std::string metadata_dir_;
     std::unique_ptr<IDeviceInfo> device_;
diff --git a/fs_mgr/libsnapshot/test_helpers.h b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
similarity index 76%
rename from fs_mgr/libsnapshot/test_helpers.h
rename to fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
index ea2c5b6..98bf56a 100644
--- a/fs_mgr/libsnapshot/test_helpers.h
+++ b/fs_mgr/libsnapshot/include_test/libsnapshot/test_helpers.h
@@ -14,9 +14,12 @@
 
 #pragma once
 
+#include <memory>
 #include <optional>
 #include <string>
+#include <unordered_set>
 
+#include <android-base/file.h>
 #include <android/hardware/boot/1.1/IBootControl.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
@@ -39,7 +42,6 @@
 using testing::_;
 using testing::AssertionResult;
 using testing::NiceMock;
-using testing::Return;
 
 using namespace android::storage_literals;
 using namespace std::string_literals;
@@ -88,22 +90,33 @@
         return true;
     }
     bool IsOverlayfsSetup() const override { return false; }
+    bool IsRecovery() const override { return recovery_; }
+    bool SetSlotAsUnbootable(unsigned int slot) override {
+        unbootable_slots_.insert(slot);
+        return true;
+    }
+
+    bool IsSlotUnbootable(uint32_t slot) { return unbootable_slots_.count(slot) != 0; }
 
     void set_slot_suffix(const std::string& suffix) { slot_suffix_ = suffix; }
     void set_fake_super(const std::string& path) {
         opener_ = std::make_unique<TestPartitionOpener>(path);
     }
+    void set_recovery(bool value) { recovery_ = value; }
     MergeStatus merge_status() const { return merge_status_; }
 
   private:
     std::string slot_suffix_ = "_a";
     std::unique_ptr<TestPartitionOpener> opener_;
     MergeStatus merge_status_;
+    bool recovery_ = false;
+    std::unordered_set<uint32_t> unbootable_slots_;
 };
 
 class SnapshotTestPropertyFetcher : public android::fs_mgr::testing::MockPropertyFetcher {
   public:
     SnapshotTestPropertyFetcher(const std::string& slot_suffix) {
+        using testing::Return;
         ON_CALL(*this, GetProperty("ro.boot.slot_suffix", _)).WillByDefault(Return(slot_suffix));
         ON_CALL(*this, GetBoolProperty("ro.boot.dynamic_partitions", _))
                 .WillByDefault(Return(true));
@@ -126,8 +139,11 @@
 // Helper for error-spam-free cleanup.
 void DeleteBackingImage(android::fiemap::IImageManager* manager, const std::string& name);
 
-// Write some random data to the given device. Will write until reaching end of the device.
-bool WriteRandomData(const std::string& device);
+// Write some random data to the given device.
+// If expect_size is not specified, will write until reaching end of the device.
+// Expect space of |path| is multiple of 4K.
+bool WriteRandomData(const std::string& path, std::optional<size_t> expect_size = std::nullopt,
+                     std::string* hash = nullptr);
 
 std::optional<std::string> GetHash(const std::string& path);
 
@@ -138,5 +154,31 @@
 // In the update package metadata, set a partition with the given size.
 void SetSize(PartitionUpdate* partition_update, uint64_t size);
 
+// Get partition size from update package metadata.
+uint64_t GetSize(PartitionUpdate* partition_update);
+
+// Util class for test cases on low space scenario. These tests assumes image manager
+// uses /data as backup device.
+class LowSpaceUserdata {
+  public:
+    // Set the maximum free space allowed for this test. If /userdata has more space than the given
+    // number, a file is allocated to consume space.
+    AssertionResult Init(uint64_t max_free_space);
+
+    uint64_t free_space() const;
+    uint64_t available_space() const;
+    uint64_t bsize() const;
+
+  private:
+    AssertionResult ReadUserdataStats();
+
+    static constexpr const char* kUserDataDevice = "/data";
+    std::unique_ptr<TemporaryFile> big_file_;
+    bool initialized_ = false;
+    uint64_t free_space_ = 0;
+    uint64_t available_space_ = 0;
+    uint64_t bsize_ = 0;
+};
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/partition_cow_creator.cpp b/fs_mgr/libsnapshot/partition_cow_creator.cpp
index eedc1cd..61f5c0c 100644
--- a/fs_mgr/libsnapshot/partition_cow_creator.cpp
+++ b/fs_mgr/libsnapshot/partition_cow_creator.cpp
@@ -17,8 +17,9 @@
 #include <math.h>
 
 #include <android-base/logging.h>
-
 #include <android/snapshot/snapshot.pb.h>
+
+#include "dm_snapshot_internals.h"
 #include "utility.h"
 
 using android::dm::kSectorSize;
@@ -33,13 +34,6 @@
 namespace android {
 namespace snapshot {
 
-// Round |d| up to a multiple of |block_size|.
-static uint64_t RoundUp(double d, uint64_t block_size) {
-    uint64_t ret = ((uint64_t)ceil(d) + block_size - 1) / block_size * block_size;
-    CHECK(ret >= d) << "Can't round " << d << " up to a multiple of " << block_size;
-    return ret;
-}
-
 // Intersect two linear extents. If no intersection, return an extent with length 0.
 static std::unique_ptr<Extent> Intersect(Extent* target_extent, Extent* existing_extent) {
     // Convert target_extent and existing_extent to linear extents. Zero extents
@@ -68,33 +62,83 @@
     return false;
 }
 
-std::optional<uint64_t> PartitionCowCreator::GetCowSize(uint64_t snapshot_size) {
-    // TODO: Use |operations|. to determine a minimum COW size.
-    // kCowEstimateFactor is good for prototyping but we can't use that in production.
-    static constexpr double kCowEstimateFactor = 1.05;
-    auto cow_size = RoundUp(snapshot_size * kCowEstimateFactor, kDefaultBlockSize);
-    return cow_size;
+bool SourceCopyOperationIsClone(const InstallOperation& operation) {
+    using ChromeOSExtent = chromeos_update_engine::Extent;
+    if (operation.src_extents().size() != operation.dst_extents().size()) {
+        return false;
+    }
+    return std::equal(operation.src_extents().begin(), operation.src_extents().end(),
+                      operation.dst_extents().begin(),
+                      [](const ChromeOSExtent& src, const ChromeOSExtent& dst) {
+                          return src.start_block() == dst.start_block() &&
+                                 src.num_blocks() == dst.num_blocks();
+                      });
+}
+
+void WriteExtent(DmSnapCowSizeCalculator* sc, const chromeos_update_engine::Extent& de,
+                 unsigned int sectors_per_block) {
+    const auto block_boundary = de.start_block() + de.num_blocks();
+    for (auto b = de.start_block(); b < block_boundary; ++b) {
+        for (unsigned int s = 0; s < sectors_per_block; ++s) {
+            const auto sector_id = b * sectors_per_block + s;
+            sc->WriteSector(sector_id);
+        }
+    }
+}
+
+uint64_t PartitionCowCreator::GetCowSize() {
+    // WARNING: The origin partition should be READ-ONLY
+    const uint64_t logical_block_size = current_metadata->logical_block_size();
+    const unsigned int sectors_per_block = logical_block_size / kSectorSize;
+    DmSnapCowSizeCalculator sc(kSectorSize, kSnapshotChunkSize);
+
+    // Allocate space for extra extents (if any). These extents are those that can be
+    // used for error corrections or to store verity hash trees.
+    for (const auto& de : extra_extents) {
+        WriteExtent(&sc, de, sectors_per_block);
+    }
+
+    if (operations == nullptr) return sc.cow_size_bytes();
+
+    for (const auto& iop : *operations) {
+        // Do not allocate space for operations that are going to be skipped
+        // during OTA application.
+        if (iop.type() == InstallOperation::SOURCE_COPY && SourceCopyOperationIsClone(iop))
+            continue;
+
+        for (const auto& de : iop.dst_extents()) {
+            WriteExtent(&sc, de, sectors_per_block);
+        }
+    }
+
+    return sc.cow_size_bytes();
 }
 
 std::optional<PartitionCowCreator::Return> PartitionCowCreator::Run() {
     CHECK(current_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME &&
           target_metadata->GetBlockDevicePartitionName(0) == LP_METADATA_DEFAULT_PARTITION_NAME);
 
-    uint64_t logical_block_size = current_metadata->logical_block_size();
+    const uint64_t logical_block_size = current_metadata->logical_block_size();
     CHECK(logical_block_size != 0 && !(logical_block_size & (logical_block_size - 1)))
             << "logical_block_size is not power of 2";
 
     Return ret;
     ret.snapshot_status.set_name(target_partition->name());
     ret.snapshot_status.set_device_size(target_partition->size());
-
-    // TODO(b/141889746): Optimize by using a smaller snapshot. Some ranges in target_partition
-    // may be written directly.
     ret.snapshot_status.set_snapshot_size(target_partition->size());
 
-    auto cow_size = GetCowSize(ret.snapshot_status.snapshot_size());
-    if (!cow_size.has_value()) return std::nullopt;
-
+    // Being the COW partition virtual, its size doesn't affect the storage
+    // memory that will be occupied by the target.
+    // The actual storage space is affected by the COW file, whose size depends
+    // on the chunks that diverged between |current| and |target|.
+    // If the |target| partition is bigger than |current|, the data that is
+    // modified outside of |current| can be written directly to |current|.
+    // This because the data that will be written outside of |current| would
+    // not invalidate any useful information of |current|, thus:
+    // - if the snapshot is accepted for merge, this data would be already at
+    // the right place and should not be copied;
+    // - in the unfortunate case of the snapshot to be discarded, the regions
+    // modified by this data can be set as free regions and reused.
     // Compute regions that are free in both current and target metadata. These are the regions
     // we can use for COW partition.
     auto target_free_regions = target_metadata->GetFreeRegions();
@@ -102,13 +146,15 @@
     auto free_regions = Interval::Intersect(target_free_regions, current_free_regions);
     uint64_t free_region_length = 0;
     for (const auto& interval : free_regions) {
-        free_region_length += interval.length() * kSectorSize;
+        free_region_length += interval.length();
     }
+    free_region_length *= kSectorSize;
 
     LOG(INFO) << "Remaining free space for COW: " << free_region_length << " bytes";
+    auto cow_size = GetCowSize();
 
     // Compute the COW partition size.
-    uint64_t cow_partition_size = std::min(*cow_size, free_region_length);
+    uint64_t cow_partition_size = std::min(cow_size, free_region_length);
     // Round it down to the nearest logical block. Logical partitions must be a multiple
     // of logical blocks.
     cow_partition_size &= ~(logical_block_size - 1);
@@ -116,8 +162,7 @@
     // Assign cow_partition_usable_regions to indicate what regions should the COW partition uses.
     ret.cow_partition_usable_regions = std::move(free_regions);
 
-    // The rest of the COW space is allocated on ImageManager.
-    uint64_t cow_file_size = (*cow_size) - ret.snapshot_status.cow_partition_size();
+    auto cow_file_size = cow_size - cow_partition_size;
     // Round it up to the nearest sector.
     cow_file_size += kSectorSize - 1;
     cow_file_size &= ~(kSectorSize - 1);
diff --git a/fs_mgr/libsnapshot/partition_cow_creator.h b/fs_mgr/libsnapshot/partition_cow_creator.h
index 8888f78..699f9a1 100644
--- a/fs_mgr/libsnapshot/partition_cow_creator.h
+++ b/fs_mgr/libsnapshot/partition_cow_creator.h
@@ -18,6 +18,7 @@
 
 #include <optional>
 #include <string>
+#include <vector>
 
 #include <liblp/builder.h>
 #include <update_engine/update_metadata.pb.h>
@@ -30,6 +31,7 @@
 // Helper class that creates COW for a partition.
 struct PartitionCowCreator {
     using Extent = android::fs_mgr::Extent;
+    using ChromeOSExtent = chromeos_update_engine::Extent;
     using Interval = android::fs_mgr::Interval;
     using MetadataBuilder = android::fs_mgr::MetadataBuilder;
     using Partition = android::fs_mgr::Partition;
@@ -50,6 +52,9 @@
     std::string current_suffix;
     // List of operations to be applied on the partition.
     const RepeatedPtrField<InstallOperation>* operations = nullptr;
+    // Extra extents that are going to be invalidated during the update
+    // process.
+    std::vector<ChromeOSExtent> extra_extents = {};
 
     struct Return {
         SnapshotStatus snapshot_status;
@@ -60,7 +65,7 @@
 
   private:
     bool HasExtent(Partition* p, Extent* e);
-    std::optional<uint64_t> GetCowSize(uint64_t snapshot_size);
+    uint64_t GetCowSize();
 };
 
 }  // namespace snapshot
diff --git a/fs_mgr/libsnapshot/partition_cow_creator_test.cpp b/fs_mgr/libsnapshot/partition_cow_creator_test.cpp
index f683f5b..9da3f05 100644
--- a/fs_mgr/libsnapshot/partition_cow_creator_test.cpp
+++ b/fs_mgr/libsnapshot/partition_cow_creator_test.cpp
@@ -14,12 +14,15 @@
 
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
+#include <libdm/dm.h>
 #include <liblp/builder.h>
 #include <liblp/property_fetcher.h>
 
+#include <libsnapshot/test_helpers.h>
+
 #include "dm_snapshot_internals.h"
 #include "partition_cow_creator.h"
-#include "test_helpers.h"
+#include "utility.h"
 
 using namespace android::fs_mgr;
 
@@ -100,6 +103,90 @@
     ASSERT_TRUE(ret.has_value());
 }
 
+TEST_F(PartitionCowCreatorTest, CowSize) {
+    using InstallOperation = chromeos_update_engine::InstallOperation;
+    using RepeatedInstallOperationPtr = google::protobuf::RepeatedPtrField<InstallOperation>;
+    using Extent = chromeos_update_engine::Extent;
+
+    constexpr uint64_t initial_size = 50_MiB;
+    constexpr uint64_t final_size = 40_MiB;
+
+    auto builder_a = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_a, nullptr);
+    auto system_a = builder_a->AddPartition("system_a", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_a, nullptr);
+    ASSERT_TRUE(builder_a->ResizePartition(system_a, final_size));
+
+    auto builder_b = MetadataBuilder::New(initial_size, 1_KiB, 2);
+    ASSERT_NE(builder_b, nullptr);
+    auto system_b = builder_b->AddPartition("system_b", LP_PARTITION_ATTR_READONLY);
+    ASSERT_NE(system_b, nullptr);
+    ASSERT_TRUE(builder_b->ResizePartition(system_b, final_size));
+
+    const uint64_t block_size = builder_b->logical_block_size();
+    const uint64_t chunk_size = kSnapshotChunkSize * dm::kSectorSize;
+    ASSERT_EQ(chunk_size, block_size);
+
+    auto cow_device_size = [](const std::vector<InstallOperation>& iopv, MetadataBuilder* builder_a,
+                              MetadataBuilder* builder_b, Partition* system_b) {
+        RepeatedInstallOperationPtr riop(iopv.begin(), iopv.end());
+        PartitionCowCreator creator{.target_metadata = builder_b,
+                                    .target_suffix = "_b",
+                                    .target_partition = system_b,
+                                    .current_metadata = builder_a,
+                                    .current_suffix = "_a",
+                                    .operations = &riop};
+
+        auto ret = creator.Run();
+
+        if (ret.has_value()) {
+            return ret->snapshot_status.cow_file_size() + ret->snapshot_status.cow_partition_size();
+        }
+        return std::numeric_limits<uint64_t>::max();
+    };
+
+    std::vector<InstallOperation> iopv;
+    InstallOperation iop;
+    Extent* e;
+
+    // No data written, no operations performed
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // No data written
+    e = iop.add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(0);
+    iopv.push_back(iop);
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    e = iop.add_dst_extents();
+    e->set_start_block(1);
+    e->set_num_blocks(0);
+    iopv.push_back(iop);
+    ASSERT_EQ(2 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Fill the first block
+    e = iop.add_dst_extents();
+    e->set_start_block(0);
+    e->set_num_blocks(1);
+    iopv.push_back(iop);
+    ASSERT_EQ(3 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Fill the second block
+    e = iop.add_dst_extents();
+    e->set_start_block(1);
+    e->set_num_blocks(1);
+    iopv.push_back(iop);
+    ASSERT_EQ(4 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+
+    // Jump to 5th block and write 2
+    e = iop.add_dst_extents();
+    e->set_start_block(5);
+    e->set_num_blocks(2);
+    iopv.push_back(iop);
+    ASSERT_EQ(6 * chunk_size, cow_device_size(iopv, builder_a.get(), builder_b.get(), system_b));
+}
+
 TEST(DmSnapshotInternals, CowSizeCalculator) {
     DmSnapCowSizeCalculator cc(512, 8);
     unsigned long int b;
diff --git a/fs_mgr/libsnapshot/return.cpp b/fs_mgr/libsnapshot/return.cpp
new file mode 100644
index 0000000..6559c12
--- /dev/null
+++ b/fs_mgr/libsnapshot/return.cpp
@@ -0,0 +1,46 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <libsnapshot/return.h>
+
+#include <string.h>
+
+using android::fiemap::FiemapStatus;
+
+namespace android::snapshot {
+
+std::string Return::string() const {
+    switch (error_code()) {
+        case ErrorCode::ERROR:
+            return "Error";
+        case ErrorCode::NEEDS_REBOOT:
+            return "Retry after reboot";
+        case ErrorCode::SUCCESS:
+            [[fallthrough]];
+        case ErrorCode::NO_SPACE:
+            return strerror(-static_cast<int>(error_code()));
+    }
+}
+
+Return::ErrorCode Return::FromFiemapStatusErrorCode(FiemapStatus::ErrorCode error_code) {
+    switch (error_code) {
+        case FiemapStatus::ErrorCode::SUCCESS:
+        case FiemapStatus::ErrorCode::ERROR:
+        case FiemapStatus::ErrorCode::NO_SPACE:
+            return static_cast<ErrorCode>(error_code);
+        default:
+            return ErrorCode::ERROR;
+    }
+}
+}  // namespace android::snapshot
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 48a94e4..a937b43 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -21,6 +21,7 @@
 #include <sys/unistd.h>
 
 #include <optional>
+#include <sstream>
 #include <thread>
 #include <unordered_set>
 
@@ -29,19 +30,20 @@
 #include <android-base/parseint.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
-#ifdef LIBSNAPSHOT_USE_HAL
-#include <android/hardware/boot/1.1/IBootControl.h>
-#endif
 #include <ext4_utils/ext4_utils.h>
 #include <fs_mgr.h>
 #include <fs_mgr_dm_linear.h>
-#include <fs_mgr_overlayfs.h>
 #include <fstab/fstab.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
 #include <liblp/liblp.h>
 
+#ifdef LIBSNAPSHOT_USE_CALLSTACK
+#include <utils/CallStack.h>
+#endif
+
 #include <android/snapshot/snapshot.pb.h>
+#include "device_info.h"
 #include "partition_cow_creator.h"
 #include "snapshot_metadata_updater.h"
 #include "utility.h"
@@ -57,6 +59,7 @@
 using android::dm::DmTargetSnapshot;
 using android::dm::kSectorSize;
 using android::dm::SnapshotStorageMode;
+using android::fiemap::FiemapStatus;
 using android::fiemap::IImageManager;
 using android::fs_mgr::CreateDmTable;
 using android::fs_mgr::CreateLogicalPartition;
@@ -68,6 +71,7 @@
 using android::fs_mgr::SlotNumberForSlotSuffix;
 using android::hardware::boot::V1_1::MergeStatus;
 using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::Extent;
 using chromeos_update_engine::InstallOperation;
 template <typename T>
 using RepeatedPtrField = google::protobuf::RepeatedPtrField<T>;
@@ -76,50 +80,7 @@
 using namespace std::string_literals;
 
 static constexpr char kBootIndicatorPath[] = "/metadata/ota/snapshot-boot";
-
-class DeviceInfo final : public SnapshotManager::IDeviceInfo {
-  public:
-    std::string GetGsidDir() const override { return "ota"s; }
-    std::string GetMetadataDir() const override { return "/metadata/ota"s; }
-    std::string GetSlotSuffix() const override { return fs_mgr_get_slot_suffix(); }
-    std::string GetOtherSlotSuffix() const override { return fs_mgr_get_other_slot_suffix(); }
-    const android::fs_mgr::IPartitionOpener& GetPartitionOpener() const { return opener_; }
-    std::string GetSuperDevice(uint32_t slot) const override {
-        return fs_mgr_get_super_partition_name(slot);
-    }
-    bool IsOverlayfsSetup() const override { return fs_mgr_overlayfs_is_setup(); }
-    bool SetBootControlMergeStatus(MergeStatus status) override;
-
-  private:
-    android::fs_mgr::PartitionOpener opener_;
-#ifdef LIBSNAPSHOT_USE_HAL
-    android::sp<android::hardware::boot::V1_1::IBootControl> boot_control_;
-#endif
-};
-
-bool DeviceInfo::SetBootControlMergeStatus([[maybe_unused]] MergeStatus status) {
-#ifdef LIBSNAPSHOT_USE_HAL
-    if (!boot_control_) {
-        auto hal = android::hardware::boot::V1_0::IBootControl::getService();
-        if (!hal) {
-            LOG(ERROR) << "Could not find IBootControl HAL";
-            return false;
-        }
-        boot_control_ = android::hardware::boot::V1_1::IBootControl::castFrom(hal);
-        if (!boot_control_) {
-            LOG(ERROR) << "Could not find IBootControl 1.1 HAL";
-            return false;
-        }
-    }
-    if (!boot_control_->setSnapshotMergeStatus(status)) {
-        LOG(ERROR) << "Unable to set the snapshot merge status";
-        return false;
-    }
-    return true;
-#else
-    return false;
-#endif
-}
+static constexpr auto kUpdateStateCheckInterval = 2s;
 
 // Note: IImageManager is an incomplete type in the header, so the default
 // destructor doesn't work.
@@ -175,6 +136,13 @@
     auto file = LockExclusive();
     if (!file) return false;
 
+    // Purge the ImageManager just in case there is a corrupt lp_metadata file
+    // lying around. (NB: no need to return false on an error, we can let the
+    // update try to progress.)
+    if (EnsureImageManager()) {
+        images_->RemoveAllImages();
+    }
+
     auto state = ReadUpdateState(file.get());
     if (state != UpdateState::None) {
         LOG(ERROR) << "An update is already in progress, cannot begin a new update";
@@ -210,14 +178,9 @@
 
     if (state == UpdateState::Unverified) {
         // We completed an update, but it can still be canceled if we haven't booted into it.
-        auto boot_file = GetSnapshotBootIndicatorPath();
-        std::string contents;
-        if (!android::base::ReadFileToString(boot_file, &contents)) {
-            PLOG(WARNING) << "Cannot read " << boot_file << ", proceed to canceling the update:";
-            return RemoveAllUpdateState(file.get());
-        }
-        if (device_->GetSlotSuffix() == contents) {
-            LOG(INFO) << "Canceling a previously completed update";
+        auto slot = GetCurrentSlot();
+        if (slot != Slot::Target) {
+            LOG(INFO) << "Canceling previously completed updates (if any)";
             return RemoveAllUpdateState(file.get());
         }
     }
@@ -225,13 +188,65 @@
     return true;
 }
 
+std::string SnapshotManager::ReadUpdateSourceSlotSuffix() {
+    auto boot_file = GetSnapshotBootIndicatorPath();
+    std::string contents;
+    if (!android::base::ReadFileToString(boot_file, &contents)) {
+        PLOG(WARNING) << "Cannot read " << boot_file;
+        return {};
+    }
+    return contents;
+}
+
+SnapshotManager::Slot SnapshotManager::GetCurrentSlot() {
+    auto contents = ReadUpdateSourceSlotSuffix();
+    if (contents.empty()) {
+        return Slot::Unknown;
+    }
+    if (device_->GetSlotSuffix() == contents) {
+        return Slot::Source;
+    }
+    return Slot::Target;
+}
+
+static bool RemoveFileIfExists(const std::string& path) {
+    std::string message;
+    if (!android::base::RemoveFileIfExists(path, &message)) {
+        LOG(ERROR) << "Remove failed: " << path << ": " << message;
+        return false;
+    }
+    return true;
+}
+
 bool SnapshotManager::RemoveAllUpdateState(LockedFile* lock) {
+    LOG(INFO) << "Removing all update state.";
+
+#ifdef LIBSNAPSHOT_USE_CALLSTACK
+    LOG(WARNING) << "Logging stack; see b/148818798.";
+    // Do not use CallStack's log functions because snapshotctl relies on
+    // android-base/logging to save log to files.
+    // TODO(b/148818798): remove this before we ship.
+    CallStack callstack;
+    callstack.update();
+    auto callstack_str = callstack.toString();
+    LOG(WARNING) << callstack_str.c_str();
+    std::stringstream path;
+    path << "/data/misc/snapshotctl_log/libsnapshot." << Now() << ".log";
+    android::base::WriteStringToFile(callstack_str.c_str(), path.str());
+#endif
+
     if (!RemoveAllSnapshots(lock)) {
         LOG(ERROR) << "Could not remove all snapshots";
         return false;
     }
 
-    RemoveSnapshotBootIndicator();
+    // It's okay if these fail - first-stage init performs a deeper check after
+    // reading the indicator file, so it's not a problem if it still exists
+    // after the update completes.
+    std::vector<std::string> files = {GetSnapshotBootIndicatorPath(), GetRollbackIndicatorPath()};
+    for (const auto& file : files) {
+        RemoveFileIfExists(file);
+    }
 
     // If this fails, we'll keep trying to remove the update state (as the
     // device reboots or starts a new update) until it finally succeeds.
@@ -253,12 +268,24 @@
         return false;
     }
 
+    if (!EnsureNoOverflowSnapshot(lock.get())) {
+        LOG(ERROR) << "Cannot ensure there are no overflow snapshots.";
+        return false;
+    }
+
+    // This file is written on boot to detect whether a rollback occurred. It
+    // MUST NOT exist before rebooting, otherwise, we're at risk of deleting
+    // snapshots too early.
+    if (!RemoveFileIfExists(GetRollbackIndicatorPath())) {
+        return false;
+    }
+
     // This file acts as both a quick indicator for init (it can use access(2)
     // to decide how to do first-stage mounts), and it stores the old slot, so
     // we can tell whether or not we performed a rollback.
     auto contents = device_->GetSlotSuffix();
     auto boot_file = GetSnapshotBootIndicatorPath();
-    if (!android::base::WriteStringToFile(contents, boot_file)) {
+    if (!WriteStringToFileAtomic(contents, boot_file)) {
         PLOG(ERROR) << "write failed: " << boot_file;
         return false;
     }
@@ -314,14 +341,14 @@
     return true;
 }
 
-bool SnapshotManager::CreateCowImage(LockedFile* lock, const std::string& name) {
+Return SnapshotManager::CreateCowImage(LockedFile* lock, const std::string& name) {
     CHECK(lock);
     CHECK(lock->lock_mode() == LOCK_EX);
-    if (!EnsureImageManager()) return false;
+    if (!EnsureImageManager()) return Return::Error();
 
     SnapshotStatus status;
     if (!ReadSnapshotStatus(lock, name, &status)) {
-        return false;
+        return Return::Error();
     }
 
     // The COW file size should have been rounded up to the nearest sector in CreateSnapshot.
@@ -329,12 +356,12 @@
     if (status.cow_file_size() % kSectorSize != 0) {
         LOG(ERROR) << "Snapshot " << name << " COW file size is not a multiple of the sector size: "
                    << status.cow_file_size();
-        return false;
+        return Return::Error();
     }
 
     std::string cow_image_name = GetCowImageDeviceName(name);
     int cow_flags = IImageManager::CREATE_IMAGE_DEFAULT;
-    return images_->CreateBackingImage(cow_image_name, status.cow_file_size(), cow_flags);
+    return Return(images_->CreateBackingImage(cow_image_name, status.cow_file_size(), cow_flags));
 }
 
 bool SnapshotManager::MapSnapshot(LockedFile* lock, const std::string& name,
@@ -342,13 +369,12 @@
                                   const std::chrono::milliseconds& timeout_ms,
                                   std::string* dev_path) {
     CHECK(lock);
-    if (!EnsureImageManager()) return false;
 
     SnapshotStatus status;
     if (!ReadSnapshotStatus(lock, name, &status)) {
         return false;
     }
-    if (status.state() == SnapshotState::MERGE_COMPLETED) {
+    if (status.state() == SnapshotState::NONE || status.state() == SnapshotState::MERGE_COMPLETED) {
         LOG(ERROR) << "Should not create a snapshot device for " << name
                    << " after merging has completed.";
         return false;
@@ -450,9 +476,9 @@
     return true;
 }
 
-bool SnapshotManager::MapCowImage(const std::string& name,
-                                  const std::chrono::milliseconds& timeout_ms) {
-    if (!EnsureImageManager()) return false;
+std::optional<std::string> SnapshotManager::MapCowImage(
+        const std::string& name, const std::chrono::milliseconds& timeout_ms) {
+    if (!EnsureImageManager()) return std::nullopt;
     auto cow_image_name = GetCowImageDeviceName(name);
 
     bool ok;
@@ -468,10 +494,10 @@
 
     if (ok) {
         LOG(INFO) << "Mapped " << cow_image_name << " to " << cow_dev;
-    } else {
-        LOG(ERROR) << "Could not map image device: " << cow_image_name;
+        return cow_dev;
     }
-    return ok;
+    LOG(ERROR) << "Could not map image device: " << cow_image_name;
+    return std::nullopt;
 }
 
 bool SnapshotManager::UnmapSnapshot(LockedFile* lock, const std::string& name) {
@@ -506,6 +532,14 @@
         return false;
     }
 
+    // We can't delete snapshots in recovery. The only way we'd try is it we're
+    // completing or canceling a merge in preparation for a data wipe, in which
+    // case, we don't care if the file sticks around.
+    if (device_->IsRecovery()) {
+        LOG(INFO) << "Skipping delete of snapshot " << name << " in recovery.";
+        return true;
+    }
+
     auto cow_image_name = GetCowImageDeviceName(name);
     if (images_->BackingImageExists(cow_image_name)) {
         if (!images_->DeleteBackingImage(cow_image_name)) {
@@ -532,15 +566,9 @@
         return false;
     }
 
-    std::string old_slot;
-    auto boot_file = GetSnapshotBootIndicatorPath();
-    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
-        LOG(ERROR) << "Could not determine the previous slot; aborting merge";
-        return false;
-    }
-    auto new_slot = device_->GetSlotSuffix();
-    if (new_slot == old_slot) {
-        LOG(ERROR) << "Device cannot merge while booting off old slot " << old_slot;
+    auto slot = GetCurrentSlot();
+    if (slot != Slot::Target) {
+        LOG(ERROR) << "Device cannot merge while not booting from new slot";
         return false;
     }
 
@@ -562,9 +590,47 @@
         }
     }
 
+    auto metadata = ReadCurrentMetadata();
+    for (auto it = snapshots.begin(); it != snapshots.end();) {
+        switch (GetMetadataPartitionState(*metadata, *it)) {
+            case MetadataPartitionState::Flashed:
+                LOG(WARNING) << "Detected re-flashing for partition " << *it
+                             << ". Skip merging it.";
+                [[fallthrough]];
+            case MetadataPartitionState::None: {
+                LOG(WARNING) << "Deleting snapshot for partition " << *it;
+                if (!DeleteSnapshot(lock.get(), *it)) {
+                    LOG(WARNING) << "Cannot delete snapshot for partition " << *it
+                                 << ". Skip merging it anyways.";
+                }
+                it = snapshots.erase(it);
+            } break;
+            case MetadataPartitionState::Updated: {
+                ++it;
+            } break;
+        }
+    }
+
+    DmTargetSnapshot::Status initial_target_values = {};
+    for (const auto& snapshot : snapshots) {
+        DmTargetSnapshot::Status current_status;
+        if (!QuerySnapshotStatus(snapshot, nullptr, &current_status)) {
+            return false;
+        }
+        initial_target_values.sectors_allocated += current_status.sectors_allocated;
+        initial_target_values.total_sectors += current_status.total_sectors;
+        initial_target_values.metadata_sectors += current_status.metadata_sectors;
+    }
+
+    SnapshotUpdateStatus initial_status;
+    initial_status.set_state(UpdateState::Merging);
+    initial_status.set_sectors_allocated(initial_target_values.sectors_allocated);
+    initial_status.set_total_sectors(initial_target_values.total_sectors);
+    initial_status.set_metadata_sectors(initial_target_values.metadata_sectors);
+
     // Point of no return - mark that we're starting a merge. From now on every
     // snapshot must be a merge target.
-    if (!WriteUpdateState(lock.get(), UpdateState::Merging)) {
+    if (!WriteSnapshotUpdateStatus(lock.get(), initial_status)) {
         return false;
     }
 
@@ -717,7 +783,7 @@
 // Note that when a merge fails, we will *always* try again to complete the
 // merge each time the device boots. There is no harm in doing so, and if
 // the problem was transient, we might manage to get a new outcome.
-UpdateState SnapshotManager::ProcessUpdateState() {
+UpdateState SnapshotManager::ProcessUpdateState(const std::function<void()>& callback) {
     while (true) {
         UpdateState state = CheckMergeState();
         if (state == UpdateState::MergeFailed) {
@@ -729,9 +795,13 @@
             return state;
         }
 
+        if (callback) {
+            callback();
+        }
+
         // This wait is not super time sensitive, so we have a relatively
         // low polling frequency.
-        std::this_thread::sleep_for(2s);
+        std::this_thread::sleep_for(kUpdateStateCheckInterval);
     }
 }
 
@@ -809,7 +879,8 @@
                 cancelled = true;
                 break;
             default:
-                LOG(ERROR) << "Unknown merge status: " << static_cast<uint32_t>(snapshot_state);
+                LOG(ERROR) << "Unknown merge status for \"" << snapshot << "\": "
+                           << "\"" << snapshot_state << "\"";
                 failed = true;
                 break;
         }
@@ -849,8 +920,15 @@
 
     std::string dm_name = GetSnapshotDeviceName(name, snapshot_status);
 
+    std::unique_ptr<LpMetadata> current_metadata;
+
     if (!IsSnapshotDevice(dm_name)) {
-        if (IsCancelledSnapshot(name)) {
+        if (!current_metadata) {
+            current_metadata = ReadCurrentMetadata();
+        }
+
+        if (!current_metadata ||
+            GetMetadataPartitionState(*current_metadata, name) != MetadataPartitionState::Updated) {
             DeleteSnapshot(lock, name);
             return UpdateState::Cancelled;
         }
@@ -871,7 +949,8 @@
     }
 
     // This check is expensive so it is only enabled for debugging.
-    DCHECK(!IsCancelledSnapshot(name));
+    DCHECK((current_metadata = ReadCurrentMetadata()) &&
+           GetMetadataPartitionState(*current_metadata, name) == MetadataPartitionState::Updated);
 
     std::string target_type;
     DmTargetSnapshot::Status status;
@@ -917,14 +996,8 @@
     return metadata_dir_ + "/" + android::base::Basename(kBootIndicatorPath);
 }
 
-void SnapshotManager::RemoveSnapshotBootIndicator() {
-    // It's okay if this fails - first-stage init performs a deeper check after
-    // reading the indicator file, so it's not a problem if it still exists
-    // after the update completes.
-    auto boot_file = GetSnapshotBootIndicatorPath();
-    if (unlink(boot_file.c_str()) == -1 && errno != ENOENT) {
-        PLOG(ERROR) << "unlink " << boot_file;
-    }
+std::string SnapshotManager::GetRollbackIndicatorPath() {
+    return metadata_dir_ + "/rollback-indicator";
 }
 
 void SnapshotManager::AcknowledgeMergeSuccess(LockedFile* lock) {
@@ -1091,41 +1164,94 @@
 }
 
 bool SnapshotManager::HandleCancelledUpdate(LockedFile* lock) {
-    std::string old_slot;
-    auto boot_file = GetSnapshotBootIndicatorPath();
-    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
-        PLOG(ERROR) << "Unable to read the snapshot indicator file: " << boot_file;
-        return false;
-    }
-    if (device_->GetSlotSuffix() != old_slot) {
-        // We're booted into the target slot, which means we just rebooted
-        // after applying the update.
+    auto slot = GetCurrentSlot();
+    if (slot == Slot::Unknown) {
         return false;
     }
 
-    // The only way we can get here is if:
-    //  (1) The device rolled back to the previous slot.
-    //  (2) This function was called prematurely before rebooting the device.
-    //  (3) fastboot set_active was used.
-    //
-    // In any case, delete the snapshots. It may be worth using the boot_control
-    // HAL to differentiate case (2).
-    RemoveAllUpdateState(lock);
-    return true;
+    // If all snapshots were reflashed, then cancel the entire update.
+    if (AreAllSnapshotsCancelled(lock)) {
+        RemoveAllUpdateState(lock);
+        return true;
+    }
+
+    // This unverified update might be rolled back, or it might not (b/147347110
+    // comment #77). Take no action, as update_engine is responsible for deciding
+    // whether to cancel.
+    LOG(ERROR) << "Update state is being processed before reboot, taking no action.";
+    return false;
 }
 
-bool SnapshotManager::IsCancelledSnapshot(const std::string& snapshot_name) {
+std::unique_ptr<LpMetadata> SnapshotManager::ReadCurrentMetadata() {
     const auto& opener = device_->GetPartitionOpener();
     uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
     auto super_device = device_->GetSuperDevice(slot);
     auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, slot);
     if (!metadata) {
         LOG(ERROR) << "Could not read dynamic partition metadata for device: " << super_device;
+        return nullptr;
+    }
+    return metadata;
+}
+
+SnapshotManager::MetadataPartitionState SnapshotManager::GetMetadataPartitionState(
+        const LpMetadata& metadata, const std::string& name) {
+    auto partition = android::fs_mgr::FindPartition(metadata, name);
+    if (!partition) return MetadataPartitionState::None;
+    if (partition->attributes & LP_PARTITION_ATTR_UPDATED) {
+        return MetadataPartitionState::Updated;
+    }
+    return MetadataPartitionState::Flashed;
+}
+
+bool SnapshotManager::AreAllSnapshotsCancelled(LockedFile* lock) {
+    std::vector<std::string> snapshots;
+    if (!ListSnapshots(lock, &snapshots)) {
+        LOG(WARNING) << "Failed to list snapshots to determine whether device has been flashed "
+                     << "after applying an update. Assuming no snapshots.";
+        // Let HandleCancelledUpdate resets UpdateState.
+        return true;
+    }
+
+    auto source_slot_suffix = ReadUpdateSourceSlotSuffix();
+    if (source_slot_suffix.empty()) {
         return false;
     }
-    auto partition = android::fs_mgr::FindPartition(*metadata.get(), snapshot_name);
-    if (!partition) return false;
-    return (partition->attributes & LP_PARTITION_ATTR_UPDATED) == 0;
+    uint32_t source_slot = SlotNumberForSlotSuffix(source_slot_suffix);
+    uint32_t target_slot = (source_slot == 0) ? 1 : 0;
+
+    // Attempt to detect re-flashing on each partition.
+    // - If all partitions are re-flashed, we can proceed to cancel the whole update.
+    // - If only some of the partitions are re-flashed, snapshots for re-flashed partitions are
+    //   deleted. Caller is responsible for merging the rest of the snapshots.
+    // - If none of the partitions are re-flashed, caller is responsible for merging the snapshots.
+    //
+    // Note that we use target slot metadata, since if an OTA has been applied
+    // to the target slot, we can detect the UPDATED flag. Any kind of flash
+    // operation against dynamic partitions ensures that all copies of the
+    // metadata are in sync, so flashing all partitions on the source slot will
+    // remove the UPDATED flag on the target slot as well.
+    const auto& opener = device_->GetPartitionOpener();
+    auto super_device = device_->GetSuperDevice(target_slot);
+    auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, target_slot);
+    if (!metadata) {
+        return false;
+    }
+
+    bool all_snapshots_cancelled = true;
+    for (const auto& snapshot_name : snapshots) {
+        if (GetMetadataPartitionState(*metadata, snapshot_name) ==
+            MetadataPartitionState::Updated) {
+            all_snapshots_cancelled = false;
+            continue;
+        }
+        // Delete snapshots for partitions that are re-flashed after the update.
+        LOG(WARNING) << "Detected re-flashing of partition " << snapshot_name << ".";
+    }
+    if (all_snapshots_cancelled) {
+        LOG(WARNING) << "All partitions are re-flashed after update, removing all update states.";
+    }
+    return all_snapshots_cancelled;
 }
 
 bool SnapshotManager::RemoveAllSnapshots(LockedFile* lock) {
@@ -1136,8 +1262,27 @@
     }
 
     bool ok = true;
+    bool has_mapped_cow_images = false;
     for (const auto& name : snapshots) {
-        ok &= (UnmapPartitionWithSnapshot(lock, name) && DeleteSnapshot(lock, name));
+        if (!UnmapPartitionWithSnapshot(lock, name) || !DeleteSnapshot(lock, name)) {
+            // Remember whether or not we were able to unmap the cow image.
+            auto cow_image_device = GetCowImageDeviceName(name);
+            has_mapped_cow_images |=
+                    (EnsureImageManager() && images_->IsImageMapped(cow_image_device));
+
+            ok = false;
+        }
+    }
+
+    if (ok || !has_mapped_cow_images) {
+        // Delete any image artifacts as a precaution, in case an update is
+        // being cancelled due to some corrupted state in an lp_metadata file.
+        // Note that we do not do this if some cow images are still mapped,
+        // since we must not remove backing storage if it's in use.
+        if (!EnsureImageManager() || !images_->RemoveAllImages()) {
+            LOG(ERROR) << "Could not remove all snapshot artifacts";
+            return false;
+        }
     }
     return ok;
 }
@@ -1149,20 +1294,50 @@
         return UpdateState::None;
     }
 
-    auto file = LockShared();
-    if (!file) {
+    auto lock = LockShared();
+    if (!lock) {
         return UpdateState::None;
     }
 
-    auto state = ReadUpdateState(file.get());
-    if (progress) {
-        *progress = 0.0;
-        if (state == UpdateState::Merging) {
-            // :TODO: When merging is implemented, set progress_val.
-        } else if (state == UpdateState::MergeCompleted) {
-            *progress = 100.0;
-        }
+    SnapshotUpdateStatus update_status = ReadSnapshotUpdateStatus(lock.get());
+    auto state = update_status.state();
+    if (progress == nullptr) {
+        return state;
     }
+
+    if (state == UpdateState::MergeCompleted) {
+        *progress = 100.0;
+        return state;
+    }
+
+    *progress = 0.0;
+    if (state != UpdateState::Merging) {
+        return state;
+    }
+
+    // Sum all the snapshot states as if the system consists of a single huge
+    // snapshots device, then compute the merge completion percentage of that
+    // device.
+    std::vector<std::string> snapshots;
+    if (!ListSnapshots(lock.get(), &snapshots)) {
+        LOG(ERROR) << "Could not list snapshots";
+        return state;
+    }
+
+    DmTargetSnapshot::Status fake_snapshots_status = {};
+    for (const auto& snapshot : snapshots) {
+        DmTargetSnapshot::Status current_status;
+
+        if (!QuerySnapshotStatus(snapshot, nullptr, &current_status)) continue;
+
+        fake_snapshots_status.sectors_allocated += current_status.sectors_allocated;
+        fake_snapshots_status.total_sectors += current_status.total_sectors;
+        fake_snapshots_status.metadata_sectors += current_status.metadata_sectors;
+    }
+
+    *progress = DmTargetSnapshot::MergePercent(fake_snapshots_status,
+                                               update_status.sectors_allocated());
+
     return state;
 }
 
@@ -1195,14 +1370,18 @@
     // ultimately we'll fail to boot. Why not make it a fatal error and have
     // the reason be clearer? Because the indicator file still exists, and
     // if this was FATAL, reverting to the old slot would be broken.
-    std::string old_slot;
-    auto boot_file = GetSnapshotBootIndicatorPath();
-    if (!android::base::ReadFileToString(boot_file, &old_slot)) {
-        PLOG(ERROR) << "Unable to read the snapshot indicator file: " << boot_file;
-        return false;
-    }
-    if (device_->GetSlotSuffix() == old_slot) {
-        LOG(INFO) << "Detected slot rollback, will not mount snapshots.";
+    auto slot = GetCurrentSlot();
+
+    if (slot != Slot::Target) {
+        if (slot == Slot::Source && !device_->IsRecovery()) {
+            // Device is rebooting into the original slot, so mark this as a
+            // rollback.
+            auto path = GetRollbackIndicatorPath();
+            if (!android::base::WriteStringToFile("1", path)) {
+                PLOG(ERROR) << "Unable to write rollback indicator: " << path;
+            }
+        }
+        LOG(INFO) << "Not booting from new slot. Will not mount snapshots.";
         return false;
     }
 
@@ -1224,7 +1403,8 @@
     }
 }
 
-bool SnapshotManager::CreateLogicalAndSnapshotPartitions(const std::string& super_device) {
+bool SnapshotManager::CreateLogicalAndSnapshotPartitions(
+        const std::string& super_device, const std::chrono::milliseconds& timeout_ms) {
     LOG(INFO) << "Creating logical partitions with snapshots as needed";
 
     auto lock = LockExclusive();
@@ -1250,6 +1430,7 @@
                 .metadata = metadata.get(),
                 .partition = &partition,
                 .partition_opener = &opener,
+                .timeout_ms = timeout_ms,
         };
         std::string ignore_path;
         if (!MapPartitionWithSnapshot(lock.get(), std::move(params), &ignore_path)) {
@@ -1331,6 +1512,17 @@
         if (live_snapshot_status->state() == SnapshotState::MERGE_COMPLETED) {
             live_snapshot_status.reset();
         }
+
+        if (live_snapshot_status->state() == SnapshotState::NONE ||
+            live_snapshot_status->cow_partition_size() + live_snapshot_status->cow_file_size() ==
+                    0) {
+            LOG(WARNING) << "Snapshot status for " << params.GetPartitionName()
+                         << " is invalid, ignoring: state = "
+                         << SnapshotState_Name(live_snapshot_status->state())
+                         << ", cow_partition_size = " << live_snapshot_status->cow_partition_size()
+                         << ", cow_file_size = " << live_snapshot_status->cow_file_size();
+            live_snapshot_status.reset();
+        }
     } while (0);
 
     if (live_snapshot_status.has_value()) {
@@ -1428,7 +1620,6 @@
                                     const SnapshotStatus& snapshot_status,
                                     AutoDeviceList* created_devices, std::string* cow_name) {
     CHECK(lock);
-    if (!EnsureImageManager()) return false;
     CHECK(snapshot_status.cow_partition_size() + snapshot_status.cow_file_size() > 0);
     auto begin = std::chrono::steady_clock::now();
 
@@ -1440,10 +1631,11 @@
 
     // Map COW image if necessary.
     if (snapshot_status.cow_file_size() > 0) {
+        if (!EnsureImageManager()) return false;
         auto remaining_time = GetRemainingTime(params.timeout_ms, begin);
         if (remaining_time.count() < 0) return false;
 
-        if (!MapCowImage(partition_name, remaining_time)) {
+        if (!MapCowImage(partition_name, remaining_time).has_value()) {
             LOG(ERROR) << "Could not map cow image for partition: " << partition_name;
             return false;
         }
@@ -1515,9 +1707,9 @@
     return true;
 }
 
-auto SnapshotManager::OpenFile(const std::string& file, int open_flags, int lock_flags)
+auto SnapshotManager::OpenFile(const std::string& file, int lock_flags)
         -> std::unique_ptr<LockedFile> {
-    unique_fd fd(open(file.c_str(), open_flags | O_CLOEXEC | O_NOFOLLOW | O_SYNC, 0660));
+    unique_fd fd(open(file.c_str(), O_RDONLY | O_CLOEXEC | O_NOFOLLOW));
     if (fd < 0) {
         PLOG(ERROR) << "Open failed: " << file;
         return nullptr;
@@ -1542,33 +1734,24 @@
     return metadata_dir_ + "/state"s;
 }
 
-std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::OpenStateFile(int open_flags,
-                                                                            int lock_flags) {
-    auto state_file = GetStateFilePath();
-    return OpenFile(state_file, open_flags, lock_flags);
+std::string SnapshotManager::GetLockPath() const {
+    return metadata_dir_;
+}
+
+std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::OpenLock(int lock_flags) {
+    auto lock_file = GetLockPath();
+    return OpenFile(lock_file, lock_flags);
 }
 
 std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::LockShared() {
-    return OpenStateFile(O_RDONLY, LOCK_SH);
+    return OpenLock(LOCK_SH);
 }
 
 std::unique_ptr<SnapshotManager::LockedFile> SnapshotManager::LockExclusive() {
-    return OpenStateFile(O_RDWR | O_CREAT, LOCK_EX);
+    return OpenLock(LOCK_EX);
 }
 
-UpdateState SnapshotManager::ReadUpdateState(LockedFile* file) {
-    // Reset position since some calls read+write.
-    if (lseek(file->fd(), 0, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek state file failed";
-        return UpdateState::None;
-    }
-
-    std::string contents;
-    if (!android::base::ReadFdToString(file->fd(), &contents)) {
-        PLOG(ERROR) << "Read state file failed";
-        return UpdateState::None;
-    }
-
+static UpdateState UpdateStateFromString(const std::string& contents) {
     if (contents.empty() || contents == "none") {
         return UpdateState::None;
     } else if (contents == "initiated") {
@@ -1583,8 +1766,10 @@
         return UpdateState::MergeNeedsReboot;
     } else if (contents == "merge-failed") {
         return UpdateState::MergeFailed;
+    } else if (contents == "cancelled") {
+        return UpdateState::Cancelled;
     } else {
-        LOG(ERROR) << "Unknown merge state in update state file";
+        LOG(ERROR) << "Unknown merge state in update state file: \"" << contents << "\"";
         return UpdateState::None;
     }
 }
@@ -1605,35 +1790,70 @@
             return os << "merge-needs-reboot";
         case UpdateState::MergeFailed:
             return os << "merge-failed";
+        case UpdateState::Cancelled:
+            return os << "cancelled";
         default:
-            LOG(ERROR) << "Unknown update state";
+            LOG(ERROR) << "Unknown update state: " << static_cast<uint32_t>(state);
             return os;
     }
 }
 
-bool SnapshotManager::WriteUpdateState(LockedFile* file, UpdateState state) {
-    std::stringstream ss;
-    ss << state;
-    std::string contents = ss.str();
-    if (contents.empty()) return false;
+UpdateState SnapshotManager::ReadUpdateState(LockedFile* lock) {
+    SnapshotUpdateStatus status = ReadSnapshotUpdateStatus(lock);
+    return status.state();
+}
 
-    if (!Truncate(file)) return false;
-    if (!android::base::WriteStringToFd(contents, file->fd())) {
-        PLOG(ERROR) << "Could not write to state file";
+SnapshotUpdateStatus SnapshotManager::ReadSnapshotUpdateStatus(LockedFile* lock) {
+    CHECK(lock);
+
+    SnapshotUpdateStatus status = {};
+    std::string contents;
+    if (!android::base::ReadFileToString(GetStateFilePath(), &contents)) {
+        PLOG(ERROR) << "Read state file failed";
+        status.set_state(UpdateState::None);
+        return status;
+    }
+
+    if (!status.ParseFromString(contents)) {
+        LOG(WARNING) << "Unable to parse state file as SnapshotUpdateStatus, using the old format";
+
+        // Try to rollback to legacy file to support devices that are
+        // currently using the old file format.
+        // TODO(b/147409432)
+        status.set_state(UpdateStateFromString(contents));
+    }
+
+    return status;
+}
+
+bool SnapshotManager::WriteUpdateState(LockedFile* lock, UpdateState state) {
+    SnapshotUpdateStatus status = {};
+    status.set_state(state);
+    return WriteSnapshotUpdateStatus(lock, status);
+}
+
+bool SnapshotManager::WriteSnapshotUpdateStatus(LockedFile* lock,
+                                                const SnapshotUpdateStatus& status) {
+    CHECK(lock);
+    CHECK(lock->lock_mode() == LOCK_EX);
+
+    std::string contents;
+    if (!status.SerializeToString(&contents)) {
+        LOG(ERROR) << "Unable to serialize SnapshotUpdateStatus.";
         return false;
     }
 
 #ifdef LIBSNAPSHOT_USE_HAL
     auto merge_status = MergeStatus::UNKNOWN;
-    switch (state) {
+    switch (status.state()) {
         // The needs-reboot and completed cases imply that /data and /metadata
         // can be safely wiped, so we don't report a merge status.
         case UpdateState::None:
         case UpdateState::MergeNeedsReboot:
         case UpdateState::MergeCompleted:
+        case UpdateState::Initiated:
             merge_status = MergeStatus::NONE;
             break;
-        case UpdateState::Initiated:
         case UpdateState::Unverified:
             merge_status = MergeStatus::SNAPSHOTTED;
             break;
@@ -1644,10 +1864,24 @@
         default:
             // Note that Cancelled flows to here - it is never written, since
             // it only communicates a transient state to the caller.
-            LOG(ERROR) << "Unexpected update status: " << state;
+            LOG(ERROR) << "Unexpected update status: " << status.state();
             break;
     }
-    if (!device_->SetBootControlMergeStatus(merge_status)) {
+
+    bool set_before_write =
+            merge_status == MergeStatus::SNAPSHOTTED || merge_status == MergeStatus::MERGING;
+    if (set_before_write && !device_->SetBootControlMergeStatus(merge_status)) {
+        return false;
+    }
+#endif
+
+    if (!WriteStringToFileAtomic(contents, GetStateFilePath())) {
+        PLOG(ERROR) << "Could not write to state file";
+        return false;
+    }
+
+#ifdef LIBSNAPSHOT_USE_HAL
+    if (!set_before_write && !device_->SetBootControlMergeStatus(merge_status)) {
         return false;
     }
 #endif
@@ -1690,14 +1924,14 @@
     CHECK(!status.name().empty());
 
     auto path = GetSnapshotStatusFilePath(status.name());
-    unique_fd fd(
-            open(path.c_str(), O_RDWR | O_CLOEXEC | O_NOFOLLOW | O_CREAT | O_SYNC | O_TRUNC, 0660));
-    if (fd < 0) {
-        PLOG(ERROR) << "Open failed: " << path;
+
+    std::string content;
+    if (!status.SerializeToString(&content)) {
+        LOG(ERROR) << "Unable to serialize SnapshotStatus for " << status.name();
         return false;
     }
 
-    if (!status.SerializeToFileDescriptor(fd.get())) {
+    if (!WriteStringToFileAtomic(content, path)) {
         PLOG(ERROR) << "Unable to write SnapshotStatus to " << path;
         return false;
     }
@@ -1705,18 +1939,6 @@
     return true;
 }
 
-bool SnapshotManager::Truncate(LockedFile* file) {
-    if (lseek(file->fd(), 0, SEEK_SET) < 0) {
-        PLOG(ERROR) << "lseek file failed: " << file->path();
-        return false;
-    }
-    if (ftruncate(file->fd(), 0) < 0) {
-        PLOG(ERROR) << "truncate failed: " << file->path();
-        return false;
-    }
-    return true;
-}
-
 std::string SnapshotManager::GetSnapshotDeviceName(const std::string& snapshot_name,
                                                    const SnapshotStatus& status) {
     if (status.device_size() != status.snapshot_size()) {
@@ -1763,9 +1985,21 @@
     }
 }
 
-bool SnapshotManager::CreateUpdateSnapshots(const DeltaArchiveManifest& manifest) {
+static Return AddRequiredSpace(Return orig,
+                               const std::map<std::string, SnapshotStatus>& all_snapshot_status) {
+    if (orig.error_code() != Return::ErrorCode::NO_SPACE) {
+        return orig;
+    }
+    uint64_t sum = 0;
+    for (auto&& [name, status] : all_snapshot_status) {
+        sum += status.cow_file_size();
+    }
+    return Return::NoSpace(sum);
+}
+
+Return SnapshotManager::CreateUpdateSnapshots(const DeltaArchiveManifest& manifest) {
     auto lock = LockExclusive();
-    if (!lock) return false;
+    if (!lock) return Return::Error();
 
     // TODO(b/134949511): remove this check. Right now, with overlayfs mounted, the scratch
     // partition takes up a big chunk of space in super, causing COW images to be created on
@@ -1773,7 +2007,7 @@
     if (device_->IsOverlayfsSetup()) {
         LOG(ERROR) << "Cannot create update snapshots with overlayfs setup. Run `adb enable-verity`"
                    << ", reboot, then try again.";
-        return false;
+        return Return::Error();
     }
 
     const auto& opener = device_->GetPartitionOpener();
@@ -1784,13 +2018,30 @@
     auto current_super = device_->GetSuperDevice(current_slot);
 
     auto current_metadata = MetadataBuilder::New(opener, current_super, current_slot);
+    if (current_metadata == nullptr) {
+        LOG(ERROR) << "Cannot create metadata builder.";
+        return Return::Error();
+    }
+
     auto target_metadata =
             MetadataBuilder::NewForUpdate(opener, current_super, current_slot, target_slot);
+    if (target_metadata == nullptr) {
+        LOG(ERROR) << "Cannot create target metadata builder.";
+        return Return::Error();
+    }
+
+    // Delete partitions with target suffix in |current_metadata|. Otherwise,
+    // partition_cow_creator recognizes these left-over partitions as used space.
+    for (const auto& group_name : current_metadata->ListGroups()) {
+        if (android::base::EndsWith(group_name, target_suffix)) {
+            current_metadata->RemoveGroupAndPartitions(group_name);
+        }
+    }
 
     SnapshotMetadataUpdater metadata_updater(target_metadata.get(), target_slot, manifest);
     if (!metadata_updater.Update()) {
         LOG(ERROR) << "Cannot calculate new metadata.";
-        return false;
+        return Return::Error();
     }
 
     // Delete previous COW partitions in current_metadata so that PartitionCowCreator marks those as
@@ -1812,43 +2063,44 @@
     // these devices.
     AutoDeviceList created_devices;
 
-    PartitionCowCreator cow_creator{.target_metadata = target_metadata.get(),
-                                    .target_suffix = target_suffix,
-                                    .target_partition = nullptr,
-                                    .current_metadata = current_metadata.get(),
-                                    .current_suffix = current_suffix,
-                                    .operations = nullptr};
+    PartitionCowCreator cow_creator{
+            .target_metadata = target_metadata.get(),
+            .target_suffix = target_suffix,
+            .target_partition = nullptr,
+            .current_metadata = current_metadata.get(),
+            .current_suffix = current_suffix,
+            .operations = nullptr,
+            .extra_extents = {},
+    };
 
-    if (!CreateUpdateSnapshotsInternal(lock.get(), manifest, &cow_creator, &created_devices,
-                                       &all_snapshot_status)) {
-        return false;
-    }
+    auto ret = CreateUpdateSnapshotsInternal(lock.get(), manifest, &cow_creator, &created_devices,
+                                             &all_snapshot_status);
+    if (!ret.is_ok()) return ret;
 
     auto exported_target_metadata = target_metadata->Export();
     if (exported_target_metadata == nullptr) {
         LOG(ERROR) << "Cannot export target metadata";
-        return false;
+        return Return::Error();
     }
 
-    if (!InitializeUpdateSnapshots(lock.get(), target_metadata.get(),
-                                   exported_target_metadata.get(), target_suffix,
-                                   all_snapshot_status)) {
-        return false;
-    }
+    ret = InitializeUpdateSnapshots(lock.get(), target_metadata.get(),
+                                    exported_target_metadata.get(), target_suffix,
+                                    all_snapshot_status);
+    if (!ret.is_ok()) return ret;
 
     if (!UpdatePartitionTable(opener, device_->GetSuperDevice(target_slot),
                               *exported_target_metadata, target_slot)) {
         LOG(ERROR) << "Cannot write target metadata";
-        return false;
+        return Return::Error();
     }
 
     created_devices.Release();
     LOG(INFO) << "Successfully created all snapshots for target slot " << target_suffix;
 
-    return true;
+    return Return::Ok();
 }
 
-bool SnapshotManager::CreateUpdateSnapshotsInternal(
+Return SnapshotManager::CreateUpdateSnapshotsInternal(
         LockedFile* lock, const DeltaArchiveManifest& manifest, PartitionCowCreator* cow_creator,
         AutoDeviceList* created_devices,
         std::map<std::string, SnapshotStatus>* all_snapshot_status) {
@@ -1859,18 +2111,27 @@
 
     if (!target_metadata->AddGroup(kCowGroupName, 0)) {
         LOG(ERROR) << "Cannot add group " << kCowGroupName;
-        return false;
+        return Return::Error();
     }
 
     std::map<std::string, const RepeatedPtrField<InstallOperation>*> install_operation_map;
+    std::map<std::string, std::vector<Extent>> extra_extents_map;
     for (const auto& partition_update : manifest.partitions()) {
         auto suffixed_name = partition_update.partition_name() + target_suffix;
-        auto&& [it, inserted] = install_operation_map.emplace(std::move(suffixed_name),
-                                                              &partition_update.operations());
+        auto&& [it, inserted] =
+                install_operation_map.emplace(suffixed_name, &partition_update.operations());
         if (!inserted) {
             LOG(ERROR) << "Duplicated partition " << partition_update.partition_name()
                        << " in update manifest.";
-            return false;
+            return Return::Error();
+        }
+
+        auto& extra_extents = extra_extents_map[suffixed_name];
+        if (partition_update.has_hash_tree_extent()) {
+            extra_extents.push_back(partition_update.hash_tree_extent());
+        }
+        if (partition_update.has_fec_extent()) {
+            extra_extents.push_back(partition_update.fec_extent());
         }
     }
 
@@ -1882,10 +2143,16 @@
             cow_creator->operations = operations_it->second;
         }
 
+        cow_creator->extra_extents.clear();
+        auto extra_extents_it = extra_extents_map.find(target_partition->name());
+        if (extra_extents_it != extra_extents_map.end()) {
+            cow_creator->extra_extents = std::move(extra_extents_it->second);
+        }
+
         // Compute the device sizes for the partition.
         auto cow_creator_ret = cow_creator->Run();
         if (!cow_creator_ret.has_value()) {
-            return false;
+            return Return::Error();
         }
 
         LOG(INFO) << "For partition " << target_partition->name()
@@ -1899,7 +2166,7 @@
         if (!DeleteSnapshot(lock, target_partition->name())) {
             LOG(ERROR) << "Cannot delete existing snapshot before creating a new one for partition "
                        << target_partition->name();
-            return false;
+            return Return::Error();
         }
 
         // It is possible that the whole partition uses free space in super, and snapshot / COW
@@ -1917,7 +2184,7 @@
 
         // Store these device sizes to snapshot status file.
         if (!CreateSnapshot(lock, &cow_creator_ret->snapshot_status)) {
-            return false;
+            return Return::Error();
         }
         created_devices->EmplaceBack<AutoDeleteSnapshot>(this, lock, target_partition->name());
 
@@ -1931,7 +2198,7 @@
             auto cow_partition = target_metadata->AddPartition(GetCowName(target_partition->name()),
                                                                kCowGroupName, 0 /* flags */);
             if (cow_partition == nullptr) {
-                return false;
+                return Return::Error();
             }
 
             if (!target_metadata->ResizePartition(
@@ -1939,28 +2206,34 @@
                         cow_creator_ret->cow_partition_usable_regions)) {
                 LOG(ERROR) << "Cannot create COW partition on metadata with size "
                            << cow_creator_ret->snapshot_status.cow_partition_size();
-                return false;
+                return Return::Error();
             }
             // Only the in-memory target_metadata is modified; nothing to clean up if there is an
             // error in the future.
         }
 
-        // Create the backing COW image if necessary.
-        if (cow_creator_ret->snapshot_status.cow_file_size() > 0) {
-            if (!CreateCowImage(lock, target_partition->name())) {
-                return false;
-            }
-        }
-
         all_snapshot_status->emplace(target_partition->name(),
                                      std::move(cow_creator_ret->snapshot_status));
 
-        LOG(INFO) << "Successfully created snapshot for " << target_partition->name();
+        LOG(INFO) << "Successfully created snapshot partition for " << target_partition->name();
     }
-    return true;
+
+    LOG(INFO) << "Allocating CoW images.";
+
+    for (auto&& [name, snapshot_status] : *all_snapshot_status) {
+        // Create the backing COW image if necessary.
+        if (snapshot_status.cow_file_size() > 0) {
+            auto ret = CreateCowImage(lock, name);
+            if (!ret.is_ok()) return AddRequiredSpace(ret, *all_snapshot_status);
+        }
+
+        LOG(INFO) << "Successfully created snapshot for " << name;
+    }
+
+    return Return::Ok();
 }
 
-bool SnapshotManager::InitializeUpdateSnapshots(
+Return SnapshotManager::InitializeUpdateSnapshots(
         LockedFile* lock, MetadataBuilder* target_metadata,
         const LpMetadata* exported_target_metadata, const std::string& target_suffix,
         const std::map<std::string, SnapshotStatus>& all_snapshot_status) {
@@ -1979,7 +2252,7 @@
         if (!UnmapPartitionWithSnapshot(lock, target_partition->name())) {
             LOG(ERROR) << "Cannot unmap existing COW devices before re-mapping them for zero-fill: "
                        << target_partition->name();
-            return false;
+            return Return::Error();
         }
 
         auto it = all_snapshot_status.find(target_partition->name());
@@ -1987,23 +2260,24 @@
         cow_params.partition_name = target_partition->name();
         std::string cow_name;
         if (!MapCowDevices(lock, cow_params, it->second, &created_devices_for_cow, &cow_name)) {
-            return false;
+            return Return::Error();
         }
 
         std::string cow_path;
         if (!dm.GetDmDevicePathByName(cow_name, &cow_path)) {
             LOG(ERROR) << "Cannot determine path for " << cow_name;
-            return false;
+            return Return::Error();
         }
 
-        if (!InitializeCow(cow_path)) {
+        auto ret = InitializeCow(cow_path);
+        if (!ret.is_ok()) {
             LOG(ERROR) << "Can't zero-fill COW device for " << target_partition->name() << ": "
                        << cow_path;
-            return false;
+            return AddRequiredSpace(ret, all_snapshot_status);
         }
         // Let destructor of created_devices_for_cow to unmap the COW devices.
     };
-    return true;
+    return Return::Ok();
 }
 
 bool SnapshotManager::MapUpdateSnapshot(const CreateLogicalPartitionParams& params,
@@ -2024,21 +2298,50 @@
     return UnmapPartitionWithSnapshot(lock.get(), target_partition_name);
 }
 
+bool SnapshotManager::UnmapAllPartitions() {
+    auto lock = LockExclusive();
+    if (!lock) return false;
+
+    const auto& opener = device_->GetPartitionOpener();
+    uint32_t slot = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto super_device = device_->GetSuperDevice(slot);
+    auto metadata = android::fs_mgr::ReadMetadata(opener, super_device, slot);
+    if (!metadata) {
+        LOG(ERROR) << "Could not read dynamic partition metadata for device: " << super_device;
+        return false;
+    }
+
+    bool ok = true;
+    for (const auto& partition : metadata->partitions) {
+        auto partition_name = GetPartitionName(partition);
+        ok &= UnmapPartitionWithSnapshot(lock.get(), partition_name);
+    }
+    return ok;
+}
+
+std::ostream& operator<<(std::ostream& os, SnapshotManager::Slot slot) {
+    switch (slot) {
+        case SnapshotManager::Slot::Unknown:
+            return os << "unknown";
+        case SnapshotManager::Slot::Source:
+            return os << "source";
+        case SnapshotManager::Slot::Target:
+            return os << "target";
+    }
+}
+
 bool SnapshotManager::Dump(std::ostream& os) {
     // Don't actually lock. Dump() is for debugging purposes only, so it is okay
     // if it is racy.
-    auto file = OpenStateFile(O_RDONLY, 0);
+    auto file = OpenLock(0 /* lock flag */);
     if (!file) return false;
 
     std::stringstream ss;
 
     ss << "Update state: " << ReadUpdateState(file.get()) << std::endl;
 
-    auto boot_file = GetSnapshotBootIndicatorPath();
-    std::string boot_indicator;
-    if (android::base::ReadFileToString(boot_file, &boot_indicator)) {
-        ss << "Boot indicator: old slot = " << boot_indicator << std::endl;
-    }
+    ss << "Current slot: " << device_->GetSlotSuffix() << std::endl;
+    ss << "Boot indicator: booting from " << GetCurrentSlot() << " slot" << std::endl;
 
     bool ok = true;
     std::vector<std::string> snapshots;
@@ -2066,5 +2369,217 @@
     return ok;
 }
 
+std::unique_ptr<AutoDevice> SnapshotManager::EnsureMetadataMounted() {
+    if (!device_->IsRecovery()) {
+        // No need to mount anything in recovery.
+        LOG(INFO) << "EnsureMetadataMounted does nothing in Android mode.";
+        return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice());
+    }
+    return AutoUnmountDevice::New(device_->GetMetadataDir());
+}
+
+UpdateState SnapshotManager::InitiateMergeAndWait() {
+    {
+        auto lock = LockExclusive();
+        // Sync update state from file with bootloader.
+        if (!WriteUpdateState(lock.get(), ReadUpdateState(lock.get()))) {
+            LOG(WARNING) << "Unable to sync write update state, fastboot may "
+                         << "reject / accept wipes incorrectly!";
+        }
+    }
+
+    unsigned int last_progress = 0;
+    auto callback = [&]() -> void {
+        double progress;
+        GetUpdateState(&progress);
+        if (last_progress < static_cast<unsigned int>(progress)) {
+            last_progress = progress;
+            LOG(INFO) << "Waiting for merge to complete: " << last_progress << "%.";
+        }
+    };
+
+    LOG(INFO) << "Waiting for any previous merge request to complete. "
+              << "This can take up to several minutes.";
+    auto state = ProcessUpdateState(callback);
+    if (state == UpdateState::None) {
+        LOG(INFO) << "Can't find any snapshot to merge.";
+        return state;
+    }
+    if (state == UpdateState::Unverified) {
+        if (GetCurrentSlot() != Slot::Target) {
+            LOG(INFO) << "Cannot merge until device reboots.";
+            return state;
+        }
+        if (!InitiateMerge()) {
+            LOG(ERROR) << "Failed to initiate merge.";
+            return state;
+        }
+        // All other states can be handled by ProcessUpdateState.
+        LOG(INFO) << "Waiting for merge to complete. This can take up to several minutes.";
+        last_progress = 0;
+        state = ProcessUpdateState(callback);
+    }
+
+    LOG(INFO) << "Merge finished with state \"" << state << "\".";
+    return state;
+}
+
+Return SnapshotManager::WaitForMerge() {
+    LOG(INFO) << "Waiting for any previous merge request to complete. "
+              << "This can take up to several minutes.";
+    while (true) {
+        auto state = ProcessUpdateState();
+        if (state == UpdateState::Unverified && GetCurrentSlot() == Slot::Target) {
+            LOG(INFO) << "Wait for merge to be initiated.";
+            std::this_thread::sleep_for(kUpdateStateCheckInterval);
+            continue;
+        }
+        LOG(INFO) << "Wait for merge exits with state " << state;
+        switch (state) {
+            case UpdateState::None:
+                [[fallthrough]];
+            case UpdateState::MergeCompleted:
+                [[fallthrough]];
+            case UpdateState::Cancelled:
+                return Return::Ok();
+            case UpdateState::MergeNeedsReboot:
+                return Return::NeedsReboot();
+            default:
+                return Return::Error();
+        }
+    }
+}
+
+bool SnapshotManager::HandleImminentDataWipe(const std::function<void()>& callback) {
+    if (!device_->IsRecovery()) {
+        LOG(ERROR) << "Data wipes are only allowed in recovery.";
+        return false;
+    }
+
+    auto mount = EnsureMetadataMounted();
+    if (!mount || !mount->HasDevice()) {
+        // We allow the wipe to continue, because if we can't mount /metadata,
+        // it is unlikely the device would have booted anyway. If there is no
+        // metadata partition, then the device predates Virtual A/B.
+        return true;
+    }
+
+    // Check this early, so we don't accidentally start trying to populate
+    // the state file in recovery. Note we don't call GetUpdateState since
+    // we want errors in acquiring the lock to be propagated, instead of
+    // returning UpdateState::None.
+    auto state_file = GetStateFilePath();
+    if (access(state_file.c_str(), F_OK) != 0 && errno == ENOENT) {
+        return true;
+    }
+
+    auto slot_number = SlotNumberForSlotSuffix(device_->GetSlotSuffix());
+    auto super_path = device_->GetSuperDevice(slot_number);
+    if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+        LOG(ERROR) << "Unable to map partitions to complete merge.";
+        return false;
+    }
+
+    UpdateState state = ProcessUpdateState(callback);
+    LOG(INFO) << "Update state in recovery: " << state;
+    switch (state) {
+        case UpdateState::MergeFailed:
+            LOG(ERROR) << "Unrecoverable merge failure detected.";
+            return false;
+        case UpdateState::Unverified: {
+            // If an OTA was just applied but has not yet started merging, we
+            // have no choice but to revert slots, because the current slot will
+            // immediately become unbootable. Rather than wait for the device
+            // to reboot N times until a rollback, we proactively disable the
+            // new slot instead.
+            //
+            // Since the rollback is inevitable, we don't treat a HAL failure
+            // as an error here.
+            auto slot = GetCurrentSlot();
+            if (slot == Slot::Target) {
+                LOG(ERROR) << "Reverting to old slot since update will be deleted.";
+                device_->SetSlotAsUnbootable(slot_number);
+            }
+            break;
+        }
+        case UpdateState::MergeNeedsReboot:
+            // We shouldn't get here, because nothing is depending on
+            // logical partitions.
+            LOG(ERROR) << "Unexpected merge-needs-reboot state in recovery.";
+            break;
+        default:
+            break;
+    }
+
+    // Nothing should be depending on partitions now, so unmap them all.
+    if (!UnmapAllPartitions()) {
+        LOG(ERROR) << "Unable to unmap all partitions; fastboot may fail to flash.";
+    }
+    return true;
+}
+
+bool SnapshotManager::EnsureNoOverflowSnapshot(LockedFile* lock) {
+    CHECK(lock);
+
+    std::vector<std::string> snapshots;
+    if (!ListSnapshots(lock, &snapshots)) {
+        LOG(ERROR) << "Could not list snapshots.";
+        return false;
+    }
+
+    auto& dm = DeviceMapper::Instance();
+    for (const auto& snapshot : snapshots) {
+        std::vector<DeviceMapper::TargetInfo> targets;
+        if (!dm.GetTableStatus(snapshot, &targets)) {
+            LOG(ERROR) << "Could not read snapshot device table: " << snapshot;
+            return false;
+        }
+        if (targets.size() != 1) {
+            LOG(ERROR) << "Unexpected device-mapper table for snapshot: " << snapshot
+                       << ", size = " << targets.size();
+            return false;
+        }
+        if (targets[0].IsOverflowSnapshot()) {
+            LOG(ERROR) << "Detected overflow in snapshot " << snapshot
+                       << ", CoW device size computation is wrong!";
+            return false;
+        }
+    }
+
+    return true;
+}
+
+CreateResult SnapshotManager::RecoveryCreateSnapshotDevices() {
+    if (!device_->IsRecovery()) {
+        LOG(ERROR) << __func__ << " is only allowed in recovery.";
+        return CreateResult::NOT_CREATED;
+    }
+
+    auto mount = EnsureMetadataMounted();
+    if (!mount || !mount->HasDevice()) {
+        LOG(ERROR) << "Couldn't mount Metadata.";
+        return CreateResult::NOT_CREATED;
+    }
+
+    auto state_file = GetStateFilePath();
+    if (access(state_file.c_str(), F_OK) != 0 && errno == ENOENT) {
+        LOG(ERROR) << "Couldn't access state file.";
+        return CreateResult::NOT_CREATED;
+    }
+
+    if (!NeedSnapshotsInFirstStageMount()) {
+        return CreateResult::NOT_CREATED;
+    }
+
+    auto slot_suffix = device_->GetOtherSlotSuffix();
+    auto slot_number = SlotNumberForSlotSuffix(slot_suffix);
+    auto super_path = device_->GetSuperDevice(slot_number);
+    if (!CreateLogicalAndSnapshotPartitions(super_path)) {
+        LOG(ERROR) << "Unable to map partitions.";
+        return CreateResult::ERROR;
+    }
+    return CreateResult::CREATED;
+}
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp b/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp
index 7d96a67..5530e59 100644
--- a/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_metadata_updater_test.cpp
@@ -19,12 +19,13 @@
 #include <memory>
 #include <string>
 
+#include <android-base/properties.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <liblp/builder.h>
 #include <storage_literals/storage_literals.h>
 
-#include "test_helpers.h"
+#include <libsnapshot/test_helpers.h>
 
 using namespace android::storage_literals;
 using android::fs_mgr::LpMetadata;
@@ -42,6 +43,10 @@
 
 class SnapshotMetadataUpdaterTest : public ::testing::TestWithParam<uint32_t> {
   public:
+    SnapshotMetadataUpdaterTest() {
+        is_virtual_ab_ = android::base::GetBoolProperty("ro.virtual_ab.enabled", false);
+    }
+
     void SetUp() override {
         target_slot_ = GetParam();
         target_suffix_ = SlotSuffixForSlotNumber(target_slot_);
@@ -122,6 +127,7 @@
                                   << ".";
     }
 
+    bool is_virtual_ab_;
     std::unique_ptr<MetadataBuilder> builder_;
     uint32_t target_slot_;
     std::string target_suffix_;
@@ -325,7 +331,7 @@
     EXPECT_TRUE(CheckGroupName("product", "another_group"));
 }
 
-INSTANTIATE_TEST_SUITE_P(, SnapshotMetadataUpdaterTest, testing::Values(0, 1));
+INSTANTIATE_TEST_SUITE_P(Snapshot, SnapshotMetadataUpdaterTest, testing::Values(0, 1));
 
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index a008294..d87274d 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -20,12 +20,16 @@
 #include <sys/types.h>
 
 #include <chrono>
+#include <deque>
+#include <future>
 #include <iostream>
 
 #include <android-base/file.h>
+#include <android-base/logging.h>
 #include <android-base/properties.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
+#include <fs_mgr/roots.h>
 #include <fs_mgr_dm_linear.h>
 #include <gtest/gtest.h>
 #include <libdm/dm.h>
@@ -34,7 +38,7 @@
 #include <storage_literals/storage_literals.h>
 
 #include <android/snapshot/snapshot.pb.h>
-#include "test_helpers.h"
+#include <libsnapshot/test_helpers.h>
 #include "utility.h"
 
 namespace android {
@@ -43,16 +47,22 @@
 using android::base::unique_fd;
 using android::dm::DeviceMapper;
 using android::dm::DmDeviceState;
+using android::fiemap::FiemapStatus;
 using android::fiemap::IImageManager;
 using android::fs_mgr::BlockDeviceInfo;
 using android::fs_mgr::CreateLogicalPartitionParams;
 using android::fs_mgr::DestroyLogicalPartition;
+using android::fs_mgr::EnsurePathMounted;
+using android::fs_mgr::EnsurePathUnmounted;
 using android::fs_mgr::Extent;
+using android::fs_mgr::Fstab;
 using android::fs_mgr::GetPartitionGroupName;
 using android::fs_mgr::GetPartitionName;
 using android::fs_mgr::Interval;
 using android::fs_mgr::MetadataBuilder;
+using android::fs_mgr::SlotSuffixForSlotNumber;
 using chromeos_update_engine::DeltaArchiveManifest;
+using chromeos_update_engine::DynamicPartitionGroup;
 using chromeos_update_engine::PartitionUpdate;
 using namespace ::testing;
 using namespace android::storage_literals;
@@ -64,9 +74,13 @@
 TestDeviceInfo* test_device = nullptr;
 std::string fake_super;
 
+void MountMetadata();
+
 class SnapshotTest : public ::testing::Test {
   public:
-    SnapshotTest() : dm_(DeviceMapper::Instance()) {}
+    SnapshotTest() : dm_(DeviceMapper::Instance()) {
+        is_virtual_ab_ = android::base::GetBoolProperty("ro.virtual_ab.enabled", false);
+    }
 
     // This is exposed for main.
     void Cleanup() {
@@ -76,15 +90,19 @@
 
   protected:
     void SetUp() override {
+        if (!is_virtual_ab_) GTEST_SKIP() << "Test for Virtual A/B devices only";
+
         SnapshotTestPropertyFetcher::SetUp();
         InitializeState();
         CleanupTestArtifacts();
         FormatFakeSuper();
-
+        MountMetadata();
         ASSERT_TRUE(sm->BeginUpdate());
     }
 
     void TearDown() override {
+        if (!is_virtual_ab_) return;
+
         lock_ = nullptr;
 
         CleanupTestArtifacts();
@@ -133,7 +151,7 @@
     }
 
     bool AcquireLock() {
-        lock_ = sm->OpenStateFile(O_RDWR, LOCK_EX);
+        lock_ = sm->LockExclusive();
         return !!lock_;
     }
 
@@ -254,15 +272,71 @@
 
     AssertionResult MapCowImage(const std::string& name,
                                 const std::chrono::milliseconds& timeout_ms, std::string* path) {
-        if (!sm->MapCowImage(name, timeout_ms)) {
+        auto cow_image_path = sm->MapCowImage(name, timeout_ms);
+        if (!cow_image_path.has_value()) {
             return AssertionFailure() << "Cannot map cow image " << name;
         }
-        if (!dm_.GetDmDevicePathByName(name + "-cow-img"s, path)) {
-            return AssertionFailure() << "No path for " << name << "-cow-img";
+        *path = *cow_image_path;
+        return AssertionSuccess();
+    }
+
+    // Prepare A/B slot for a partition named "test_partition".
+    AssertionResult PrepareOneSnapshot(uint64_t device_size,
+                                       std::string* out_snap_device = nullptr) {
+        std::string base_device, cow_device, snap_device;
+        if (!CreatePartition("test_partition_a", device_size)) {
+            return AssertionFailure();
+        }
+        if (!MapUpdatePartitions()) {
+            return AssertionFailure();
+        }
+        if (!dm_.GetDmDevicePathByName("test_partition_b-base", &base_device)) {
+            return AssertionFailure();
+        }
+        SnapshotStatus status;
+        status.set_name("test_partition_b");
+        status.set_device_size(device_size);
+        status.set_snapshot_size(device_size);
+        status.set_cow_file_size(device_size);
+        if (!sm->CreateSnapshot(lock_.get(), &status)) {
+            return AssertionFailure();
+        }
+        if (!CreateCowImage("test_partition_b")) {
+            return AssertionFailure();
+        }
+        if (!MapCowImage("test_partition_b", 10s, &cow_device)) {
+            return AssertionFailure();
+        }
+        if (!sm->MapSnapshot(lock_.get(), "test_partition_b", base_device, cow_device, 10s,
+                             &snap_device)) {
+            return AssertionFailure();
+        }
+        if (out_snap_device) {
+            *out_snap_device = std::move(snap_device);
         }
         return AssertionSuccess();
     }
 
+    // Simulate a reboot into the new slot.
+    AssertionResult SimulateReboot() {
+        lock_ = nullptr;
+        if (!sm->FinishedSnapshotWrites()) {
+            return AssertionFailure();
+        }
+        if (!dm_.DeleteDevice("test_partition_b")) {
+            return AssertionFailure();
+        }
+        if (!DestroyLogicalPartition("test_partition_b-base")) {
+            return AssertionFailure();
+        }
+        if (!sm->UnmapCowImage("test_partition_b")) {
+            return AssertionFailure();
+        }
+        return AssertionSuccess();
+    }
+
+    static constexpr std::chrono::milliseconds snapshot_timeout_ = 5s;
+    bool is_virtual_ab_;
     DeviceMapper& dm_;
     std::unique_ptr<SnapshotManager::LockedFile> lock_;
     android::fiemap::IImageManager* image_manager_ = nullptr;
@@ -373,27 +447,17 @@
     auto sm = SnapshotManager::NewForFirstStageMount(info);
     ASSERT_NE(sm, nullptr);
     ASSERT_FALSE(sm->NeedSnapshotsInFirstStageMount());
+
+    auto indicator = sm->GetRollbackIndicatorPath();
+    ASSERT_EQ(access(indicator.c_str(), R_OK), 0);
 }
 
 TEST_F(SnapshotTest, Merge) {
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-
-    std::string base_device, cow_device, snap_device;
-    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
-    ASSERT_TRUE(MapUpdatePartitions());
-    ASSERT_TRUE(dm_.GetDmDevicePathByName("test_partition_b-base", &base_device));
-    SnapshotStatus status;
-    status.set_name("test_partition_b");
-    status.set_device_size(kDeviceSize);
-    status.set_snapshot_size(kDeviceSize);
-    status.set_cow_file_size(kDeviceSize);
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
-    ASSERT_TRUE(CreateCowImage("test_partition_b"));
-    ASSERT_TRUE(MapCowImage("test_partition_b", 10s, &cow_device));
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test_partition_b", base_device, cow_device, 10s,
-                                &snap_device));
+    std::string snap_device;
+    ASSERT_TRUE(PrepareOneSnapshot(kDeviceSize, &snap_device));
 
     std::string test_string = "This is a test string.";
     {
@@ -441,89 +505,25 @@
     ASSERT_EQ(test_string, buffer);
 }
 
-TEST_F(SnapshotTest, MergeCannotRemoveCow) {
-    ASSERT_TRUE(AcquireLock());
-
-    static const uint64_t kDeviceSize = 1024 * 1024;
-    SnapshotStatus status;
-    status.set_name("test-snapshot");
-    status.set_device_size(kDeviceSize);
-    status.set_snapshot_size(kDeviceSize);
-    status.set_cow_file_size(kDeviceSize);
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
-    ASSERT_TRUE(CreateCowImage("test-snapshot"));
-
-    std::string base_device, cow_device, snap_device;
-    ASSERT_TRUE(CreatePartition("base-device", kDeviceSize, &base_device));
-    ASSERT_TRUE(MapCowImage("test-snapshot", 10s, &cow_device));
-    ASSERT_TRUE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, cow_device, 10s,
-                                &snap_device));
-
-    // Keep an open handle to the cow device. This should cause the merge to
-    // be incomplete.
-    auto cow_path = android::base::GetProperty("gsid.mapped_image.test-snapshot-cow-img", "");
-    unique_fd fd(open(cow_path.c_str(), O_RDONLY | O_CLOEXEC));
-    ASSERT_GE(fd, 0);
-
-    // Release the lock.
-    lock_ = nullptr;
-
-    ASSERT_TRUE(sm->FinishedSnapshotWrites());
-
-    test_device->set_slot_suffix("_b");
-    ASSERT_TRUE(sm->InitiateMerge());
-
-    // COW cannot be removed due to open fd, so expect a soft failure.
-    ASSERT_EQ(sm->ProcessUpdateState(), UpdateState::MergeNeedsReboot);
-
-    // Release the handle to the COW device to fake a reboot.
-    fd.reset();
-    // Wait 1s, otherwise DeleteSnapshotDevice may fail with EBUSY.
-    sleep(1);
-    // Forcefully delete the snapshot device, so it looks like we just rebooted.
-    ASSERT_TRUE(DeleteSnapshotDevice("test-snapshot"));
-
-    // Map snapshot should fail now, because we're in a merge-complete state.
-    ASSERT_TRUE(AcquireLock());
-    ASSERT_TRUE(MapCowImage("test-snapshot", 10s, &cow_device));
-    ASSERT_FALSE(sm->MapSnapshot(lock_.get(), "test-snapshot", base_device, cow_device, 10s,
-                                 &snap_device));
-
-    // Release everything and now the merge should complete.
-    fd = {};
-    lock_ = nullptr;
-
-    ASSERT_EQ(sm->ProcessUpdateState(), UpdateState::MergeCompleted);
-}
-
 TEST_F(SnapshotTest, FirstStageMountAndMerge) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-
-    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
-    ASSERT_TRUE(MapUpdatePartitions());
-    SnapshotStatus status;
-    status.set_name("test_partition_b");
-    status.set_device_size(kDeviceSize);
-    status.set_snapshot_size(kDeviceSize);
-    status.set_cow_file_size(kDeviceSize);
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
-    ASSERT_TRUE(CreateCowImage("test_partition_b"));
-
-    // Simulate a reboot into the new slot.
-    lock_ = nullptr;
-    ASSERT_TRUE(sm->FinishedSnapshotWrites());
-    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+    ASSERT_TRUE(PrepareOneSnapshot(kDeviceSize));
+    ASSERT_TRUE(SimulateReboot());
 
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
 
     ASSERT_TRUE(AcquireLock());
 
     // Validate that we have a snapshot device.
+    SnapshotStatus status;
     ASSERT_TRUE(init->ReadSnapshotStatus(lock_.get(), "test_partition_b", &status));
     ASSERT_EQ(status.state(), SnapshotState::CREATED);
 
@@ -537,21 +537,8 @@
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-
-    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
-    ASSERT_TRUE(MapUpdatePartitions());
-    SnapshotStatus status;
-    status.set_name("test_partition_b");
-    status.set_device_size(kDeviceSize);
-    status.set_snapshot_size(kDeviceSize);
-    status.set_cow_file_size(kDeviceSize);
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
-    ASSERT_TRUE(CreateCowImage("test_partition_b"));
-
-    // Simulate a reboot into the new slot.
-    lock_ = nullptr;
-    ASSERT_TRUE(sm->FinishedSnapshotWrites());
-    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+    ASSERT_TRUE(PrepareOneSnapshot(kDeviceSize));
+    ASSERT_TRUE(SimulateReboot());
 
     // Reflash the super partition.
     FormatFakeSuper();
@@ -560,10 +547,11 @@
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
 
     ASSERT_TRUE(AcquireLock());
 
+    SnapshotStatus status;
     ASSERT_TRUE(init->ReadSnapshotStatus(lock_.get(), "test_partition_b", &status));
 
     // We should not get a snapshot device now.
@@ -577,29 +565,19 @@
 }
 
 TEST_F(SnapshotTest, FlashSuperDuringMerge) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
     ASSERT_TRUE(AcquireLock());
 
     static const uint64_t kDeviceSize = 1024 * 1024;
-
-    ASSERT_TRUE(CreatePartition("test_partition_a", kDeviceSize));
-    ASSERT_TRUE(MapUpdatePartitions());
-    SnapshotStatus status;
-    status.set_name("test_partition_b");
-    status.set_device_size(kDeviceSize);
-    status.set_snapshot_size(kDeviceSize);
-    status.set_cow_file_size(kDeviceSize);
-    ASSERT_TRUE(sm->CreateSnapshot(lock_.get(), &status));
-    ASSERT_TRUE(CreateCowImage("test_partition_b"));
-
-    // Simulate a reboot into the new slot.
-    lock_ = nullptr;
-    ASSERT_TRUE(sm->FinishedSnapshotWrites());
-    ASSERT_TRUE(DestroyLogicalPartition("test_partition_b-base"));
+    ASSERT_TRUE(PrepareOneSnapshot(kDeviceSize));
+    ASSERT_TRUE(SimulateReboot());
 
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
     ASSERT_TRUE(init->InitiateMerge());
 
     // Now, reflash super. Note that we haven't called ProcessUpdateState, so the
@@ -609,7 +587,7 @@
     FormatFakeSuper();
     ASSERT_TRUE(CreatePartition("test_partition_b", kDeviceSize));
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
 
     // Because the status is Merging, we must call ProcessUpdateState, which should
     // detect a cancelled update.
@@ -624,7 +602,7 @@
     ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
 
     ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Initiated));
-    ASSERT_EQ(test_device->merge_status(), MergeStatus::SNAPSHOTTED);
+    ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);
 
     ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
     ASSERT_EQ(test_device->merge_status(), MergeStatus::SNAPSHOTTED);
@@ -642,9 +620,159 @@
     ASSERT_EQ(test_device->merge_status(), MergeStatus::MERGING);
 }
 
+enum class Request { UNKNOWN, LOCK_SHARED, LOCK_EXCLUSIVE, UNLOCK, EXIT };
+std::ostream& operator<<(std::ostream& os, Request request) {
+    switch (request) {
+        case Request::LOCK_SHARED:
+            return os << "Shared";
+        case Request::LOCK_EXCLUSIVE:
+            return os << "Exclusive";
+        case Request::UNLOCK:
+            return os << "Unlock";
+        case Request::EXIT:
+            return os << "Exit";
+        case Request::UNKNOWN:
+            [[fallthrough]];
+        default:
+            return os << "Unknown";
+    }
+}
+
+class LockTestConsumer {
+  public:
+    AssertionResult MakeRequest(Request new_request) {
+        {
+            std::unique_lock<std::mutex> ulock(mutex_);
+            requests_.push_back(new_request);
+        }
+        cv_.notify_all();
+        return AssertionSuccess() << "Request " << new_request << " successful";
+    }
+
+    template <typename R, typename P>
+    AssertionResult WaitFulfill(std::chrono::duration<R, P> timeout) {
+        std::unique_lock<std::mutex> ulock(mutex_);
+        if (cv_.wait_for(ulock, timeout, [this] { return requests_.empty(); })) {
+            return AssertionSuccess() << "All requests_ fulfilled.";
+        }
+        return AssertionFailure() << "Timeout waiting for fulfilling " << requests_.size()
+                                  << " request(s), first one is "
+                                  << (requests_.empty() ? Request::UNKNOWN : requests_.front());
+    }
+
+    void StartHandleRequestsInBackground() {
+        future_ = std::async(std::launch::async, &LockTestConsumer::HandleRequests, this);
+    }
+
+  private:
+    void HandleRequests() {
+        static constexpr auto consumer_timeout = 3s;
+
+        auto next_request = Request::UNKNOWN;
+        do {
+            // Peek next request.
+            {
+                std::unique_lock<std::mutex> ulock(mutex_);
+                if (cv_.wait_for(ulock, consumer_timeout, [this] { return !requests_.empty(); })) {
+                    next_request = requests_.front();
+                } else {
+                    next_request = Request::EXIT;
+                }
+            }
+
+            // Handle next request.
+            switch (next_request) {
+                case Request::LOCK_SHARED: {
+                    lock_ = sm->LockShared();
+                } break;
+                case Request::LOCK_EXCLUSIVE: {
+                    lock_ = sm->LockExclusive();
+                } break;
+                case Request::EXIT:
+                    [[fallthrough]];
+                case Request::UNLOCK: {
+                    lock_.reset();
+                } break;
+                case Request::UNKNOWN:
+                    [[fallthrough]];
+                default:
+                    break;
+            }
+
+            // Pop next request. This thread is the only thread that
+            // pops from the front of the requests_ deque.
+            {
+                std::unique_lock<std::mutex> ulock(mutex_);
+                if (next_request == Request::EXIT) {
+                    requests_.clear();
+                } else {
+                    requests_.pop_front();
+                }
+            }
+            cv_.notify_all();
+        } while (next_request != Request::EXIT);
+    }
+
+    std::mutex mutex_;
+    std::condition_variable cv_;
+    std::deque<Request> requests_;
+    std::unique_ptr<SnapshotManager::LockedFile> lock_;
+    std::future<void> future_;
+};
+
+class LockTest : public ::testing::Test {
+  public:
+    void SetUp() {
+        first_consumer.StartHandleRequestsInBackground();
+        second_consumer.StartHandleRequestsInBackground();
+    }
+
+    void TearDown() {
+        EXPECT_TRUE(first_consumer.MakeRequest(Request::EXIT));
+        EXPECT_TRUE(second_consumer.MakeRequest(Request::EXIT));
+    }
+
+    static constexpr auto request_timeout = 500ms;
+    LockTestConsumer first_consumer;
+    LockTestConsumer second_consumer;
+};
+
+TEST_F(LockTest, SharedShared) {
+    ASSERT_TRUE(first_consumer.MakeRequest(Request::LOCK_SHARED));
+    ASSERT_TRUE(first_consumer.WaitFulfill(request_timeout));
+    ASSERT_TRUE(second_consumer.MakeRequest(Request::LOCK_SHARED));
+    ASSERT_TRUE(second_consumer.WaitFulfill(request_timeout));
+}
+
+using LockTestParam = std::pair<Request, Request>;
+class LockTestP : public LockTest, public ::testing::WithParamInterface<LockTestParam> {};
+TEST_P(LockTestP, Test) {
+    ASSERT_TRUE(first_consumer.MakeRequest(GetParam().first));
+    ASSERT_TRUE(first_consumer.WaitFulfill(request_timeout));
+    ASSERT_TRUE(second_consumer.MakeRequest(GetParam().second));
+    ASSERT_FALSE(second_consumer.WaitFulfill(request_timeout))
+            << "Should not be able to " << GetParam().second << " while separate thread "
+            << GetParam().first;
+    ASSERT_TRUE(first_consumer.MakeRequest(Request::UNLOCK));
+    ASSERT_TRUE(second_consumer.WaitFulfill(request_timeout))
+            << "Should be able to hold lock that is released by separate thread";
+}
+INSTANTIATE_TEST_SUITE_P(
+        LockTest, LockTestP,
+        testing::Values(LockTestParam{Request::LOCK_EXCLUSIVE, Request::LOCK_EXCLUSIVE},
+                        LockTestParam{Request::LOCK_EXCLUSIVE, Request::LOCK_SHARED},
+                        LockTestParam{Request::LOCK_SHARED, Request::LOCK_EXCLUSIVE}),
+        [](const testing::TestParamInfo<LockTestP::ParamType>& info) {
+            std::stringstream ss;
+            ss << info.param.first << info.param.second;
+            return ss.str();
+        });
+
 class SnapshotUpdateTest : public SnapshotTest {
   public:
     void SetUp() override {
+        if (!is_virtual_ab_) GTEST_SKIP() << "Test for Virtual A/B devices only";
+
         SnapshotTest::SetUp();
         Cleanup();
 
@@ -657,12 +785,12 @@
         // Not using full name "system", "vendor", "product" because these names collide with the
         // mapped partitions on the running device.
         // Each test modifies manifest_ slightly to indicate changes to the partition layout.
-        auto group = manifest_.mutable_dynamic_partition_metadata()->add_groups();
-        group->set_name("group");
-        group->set_size(kGroupSize);
-        group->add_partition_names("sys");
-        group->add_partition_names("vnd");
-        group->add_partition_names("prd");
+        group_ = manifest_.mutable_dynamic_partition_metadata()->add_groups();
+        group_->set_name("group");
+        group_->set_size(kGroupSize);
+        group_->add_partition_names("sys");
+        group_->add_partition_names("vnd");
+        group_->add_partition_names("prd");
         sys_ = manifest_.add_partitions();
         sys_->set_partition_name("sys");
         SetSize(sys_, 3_MiB);
@@ -675,10 +803,11 @@
 
         // Initialize source partition metadata using |manifest_|.
         src_ = MetadataBuilder::New(*opener_, "super", 0);
+        ASSERT_NE(src_, nullptr);
         ASSERT_TRUE(FillFakeMetadata(src_.get(), manifest_, "_a"));
-        ASSERT_NE(nullptr, src_);
         // Add sys_b which is like system_other.
-        auto partition = src_->AddPartition("sys_b", 0);
+        ASSERT_TRUE(src_->AddGroup("group_b", kGroupSize));
+        auto partition = src_->AddPartition("sys_b", "group_b", 0);
         ASSERT_NE(nullptr, partition);
         ASSERT_TRUE(src_->ResizePartition(partition, 1_MiB));
         auto metadata = src_->Export();
@@ -704,6 +833,8 @@
         }
     }
     void TearDown() override {
+        if (!is_virtual_ab_) return;
+
         Cleanup();
         SnapshotTest::TearDown();
     }
@@ -711,6 +842,7 @@
         if (!image_manager_) {
             InitializeState();
         }
+        MountMetadata();
         for (const auto& suffix : {"_a", "_b"}) {
             test_device->set_slot_suffix(suffix);
             EXPECT_TRUE(sm->CancelUpdate()) << suffix;
@@ -727,8 +859,12 @@
         if (!hash.has_value()) {
             return AssertionFailure() << "Cannot read partition " << name << ": " << path;
         }
-        if (hashes_[name] != *hash) {
-            return AssertionFailure() << "Content of " << name << " has changed after the merge";
+        auto it = hashes_.find(name);
+        if (it == hashes_.end()) {
+            return AssertionFailure() << "No existing hash for " << name << ". Bad test code?";
+        }
+        if (it->second != *hash) {
+            return AssertionFailure() << "Content of " << name << " has changed";
         }
         return AssertionSuccess();
     }
@@ -758,6 +894,75 @@
         return AssertionSuccess();
     }
 
+    AssertionResult MapUpdateSnapshot(const std::string& name, std::string* path = nullptr) {
+        std::string real_path;
+        if (!sm->MapUpdateSnapshot(
+                    CreateLogicalPartitionParams{
+                            .block_device = fake_super,
+                            .metadata_slot = 1,
+                            .partition_name = name,
+                            .timeout_ms = 10s,
+                            .partition_opener = opener_.get(),
+                    },
+                    &real_path)) {
+            return AssertionFailure() << "Unable to map snapshot " << name;
+        }
+        if (path) {
+            *path = real_path;
+        }
+        return AssertionSuccess() << "Mapped snapshot " << name << " to " << real_path;
+    }
+
+    AssertionResult WriteSnapshotAndHash(const std::string& name,
+                                         std::optional<size_t> size = std::nullopt) {
+        std::string path;
+        auto res = MapUpdateSnapshot(name, &path);
+        if (!res) {
+            return res;
+        }
+
+        std::string size_string = size ? (std::to_string(*size) + " bytes") : "";
+
+        if (!WriteRandomData(path, size, &hashes_[name])) {
+            return AssertionFailure() << "Unable to write " << size_string << " to " << path
+                                      << " for partition " << name;
+        }
+
+        return AssertionSuccess() << "Written " << size_string << " to " << path
+                                  << " for snapshot partition " << name
+                                  << ", hash: " << hashes_[name];
+    }
+
+    AssertionResult MapUpdateSnapshots(const std::vector<std::string>& names = {"sys_b", "vnd_b",
+                                                                                "prd_b"}) {
+        for (const auto& name : names) {
+            auto res = MapUpdateSnapshot(name);
+            if (!res) {
+                return res;
+            }
+        }
+        return AssertionSuccess();
+    }
+
+    // Create fake install operations to grow the COW device size.
+    void AddOperation(PartitionUpdate* partition_update, uint64_t size_bytes = 0) {
+        auto e = partition_update->add_operations()->add_dst_extents();
+        e->set_start_block(0);
+        if (size_bytes == 0) {
+            size_bytes = GetSize(partition_update);
+        }
+        e->set_num_blocks(size_bytes / manifest_.block_size());
+    }
+
+    void AddOperationForPartitions(std::vector<PartitionUpdate*> partitions = {}) {
+        if (partitions.empty()) {
+            partitions = {sys_, vnd_, prd_};
+        }
+        for (auto* partition : partitions) {
+            AddOperation(partition);
+        }
+    }
+
     std::unique_ptr<TestPartitionOpener> opener_;
     DeltaArchiveManifest manifest_;
     std::unique_ptr<MetadataBuilder> src_;
@@ -766,6 +971,7 @@
     PartitionUpdate* sys_ = nullptr;
     PartitionUpdate* vnd_ = nullptr;
     PartitionUpdate* prd_ = nullptr;
+    DynamicPartitionGroup* group_ = nullptr;
 };
 
 // Test full update flow executed by update_engine. Some partitions uses super empty space,
@@ -773,15 +979,21 @@
 // Also test UnmapUpdateSnapshot unmaps everything.
 // Also test first stage mount and merge after this.
 TEST_F(SnapshotUpdateTest, FullUpdateFlow) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
     // OTA client blindly unmaps all partitions that are possibly mapped.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
         ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
     }
 
     // Grow all partitions.
-    SetSize(sys_, 3788_KiB);
-    SetSize(vnd_, 3788_KiB);
-    SetSize(prd_, 3788_KiB);
+    constexpr uint64_t partition_size = 3788_KiB;
+    SetSize(sys_, partition_size);
+    SetSize(vnd_, partition_size);
+    SetSize(prd_, partition_size);
+
+    AddOperationForPartitions();
 
     // Execute the update.
     ASSERT_TRUE(sm->BeginUpdate());
@@ -789,27 +1001,14 @@
 
     // Test that partitions prioritize using space in super.
     auto tgt = MetadataBuilder::New(*opener_, "super", 1);
+    ASSERT_NE(tgt, nullptr);
     ASSERT_NE(nullptr, tgt->FindPartition("sys_b-cow"));
     ASSERT_NE(nullptr, tgt->FindPartition("vnd_b-cow"));
     ASSERT_EQ(nullptr, tgt->FindPartition("prd_b-cow"));
 
     // Write some data to target partitions.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
-        std::string path;
-        ASSERT_TRUE(sm->MapUpdateSnapshot(
-                CreateLogicalPartitionParams{
-                        .block_device = fake_super,
-                        .metadata_slot = 1,
-                        .partition_name = name,
-                        .timeout_ms = 10s,
-                        .partition_opener = opener_.get(),
-                },
-                &path))
-                << name;
-        ASSERT_TRUE(WriteRandomData(path));
-        auto hash = GetHash(path);
-        ASSERT_TRUE(hash.has_value());
-        hashes_[name] = *hash;
+        ASSERT_TRUE(WriteSnapshotAndHash(name, partition_size));
     }
 
     // Assert that source partitions aren't affected.
@@ -826,7 +1025,10 @@
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+
+    auto indicator = sm->GetRollbackIndicatorPath();
+    ASSERT_NE(access(indicator.c_str(), R_OK), 0);
 
     // Check that the target partitions have the same content.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
@@ -834,8 +1036,7 @@
     }
 
     // Initiate the merge and wait for it to be completed.
-    ASSERT_TRUE(init->InitiateMerge());
-    ASSERT_EQ(UpdateState::MergeCompleted, init->ProcessUpdateState());
+    ASSERT_EQ(UpdateState::MergeCompleted, init->InitiateMergeAndWait());
 
     // Check that the target partitions have the same content after the merge.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
@@ -923,46 +1124,25 @@
     ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
 
     // Check that target partitions can be mapped.
-    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
-        std::string path;
-        EXPECT_TRUE(sm->MapUpdateSnapshot(
-                CreateLogicalPartitionParams{
-                        .block_device = fake_super,
-                        .metadata_slot = 1,
-                        .partition_name = name,
-                        .timeout_ms = 10s,
-                        .partition_opener = opener_.get(),
-                },
-                &path))
-                << name;
-    }
+    EXPECT_TRUE(MapUpdateSnapshots());
 }
 
 // Test that the old partitions are not modified.
 TEST_F(SnapshotUpdateTest, TestRollback) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
     // Execute the update.
     ASSERT_TRUE(sm->BeginUpdate());
     ASSERT_TRUE(sm->UnmapUpdateSnapshot("sys_b"));
 
+    AddOperationForPartitions();
+
     ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
 
     // Write some data to target partitions.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
-        std::string path;
-        ASSERT_TRUE(sm->MapUpdateSnapshot(
-                CreateLogicalPartitionParams{
-                        .block_device = fake_super,
-                        .metadata_slot = 1,
-                        .partition_name = name,
-                        .timeout_ms = 10s,
-                        .partition_opener = opener_.get(),
-                },
-                &path))
-                << name;
-        ASSERT_TRUE(WriteRandomData(path));
-        auto hash = GetHash(path);
-        ASSERT_TRUE(hash.has_value());
-        hashes_[name] = *hash;
+        ASSERT_TRUE(WriteSnapshotAndHash(name));
     }
 
     // Assert that source partitions aren't affected.
@@ -979,7 +1159,7 @@
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
 
     // Check that the target partitions have the same content.
     for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
@@ -991,7 +1171,7 @@
     init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_a"));
     ASSERT_NE(init, nullptr);
     ASSERT_FALSE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
 
     // Assert that the source partitions aren't affected.
     for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
@@ -1018,6 +1198,7 @@
     // Execute the first update.
     ASSERT_TRUE(sm->BeginUpdate());
     ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
     ASSERT_TRUE(sm->FinishedSnapshotWrites());
 
     // Simulate shutting down the device.
@@ -1027,13 +1208,12 @@
     auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
     ASSERT_NE(init, nullptr);
     ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
-    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super"));
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
     init = nullptr;
 
     // Initiate the merge and wait for it to be completed.
     auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
-    ASSERT_TRUE(new_sm->InitiateMerge());
-    ASSERT_EQ(UpdateState::MergeCompleted, new_sm->ProcessUpdateState());
+    ASSERT_EQ(UpdateState::MergeCompleted, new_sm->InitiateMergeAndWait());
 
     // Execute the second update.
     ASSERT_TRUE(new_sm->BeginUpdate());
@@ -1041,7 +1221,9 @@
 
     // Check that the old COW space is reclaimed and does not occupy space of mapped partitions.
     auto src = MetadataBuilder::New(*opener_, "super", 1);
+    ASSERT_NE(src, nullptr);
     auto tgt = MetadataBuilder::New(*opener_, "super", 0);
+    ASSERT_NE(tgt, nullptr);
     for (const auto& cow_part_name : {"sys_a-cow", "vnd_a-cow", "prd_a-cow"}) {
         auto* cow_part = tgt->FindPartition(cow_part_name);
         ASSERT_NE(nullptr, cow_part) << cow_part_name << " does not exist in target metadata";
@@ -1057,6 +1239,585 @@
     }
 }
 
+TEST_F(SnapshotUpdateTest, RetrofitAfterRegularAb) {
+    constexpr auto kRetrofitGroupSize = kGroupSize / 2;
+
+    // Initialize device-mapper / disk
+    ASSERT_TRUE(UnmapAll());
+    FormatFakeSuper();
+
+    // Setup source partition metadata to have both _a and _b partitions.
+    src_ = MetadataBuilder::New(*opener_, "super", 0);
+    ASSERT_NE(nullptr, src_);
+    for (const auto& suffix : {"_a"s, "_b"s}) {
+        ASSERT_TRUE(src_->AddGroup(group_->name() + suffix, kRetrofitGroupSize));
+        for (const auto& name : {"sys"s, "vnd"s, "prd"s}) {
+            auto partition = src_->AddPartition(name + suffix, group_->name() + suffix, 0);
+            ASSERT_NE(nullptr, partition);
+            ASSERT_TRUE(src_->ResizePartition(partition, 2_MiB));
+        }
+    }
+    auto metadata = src_->Export();
+    ASSERT_NE(nullptr, metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *metadata.get(), 0));
+
+    // Flash source partitions
+    std::string path;
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(CreateLogicalPartition(
+                CreateLogicalPartitionParams{
+                        .block_device = fake_super,
+                        .metadata_slot = 0,
+                        .partition_name = name,
+                        .timeout_ms = 1s,
+                        .partition_opener = opener_.get(),
+                },
+                &path));
+        ASSERT_TRUE(WriteRandomData(path));
+        auto hash = GetHash(path);
+        ASSERT_TRUE(hash.has_value());
+        hashes_[name] = *hash;
+    }
+
+    // Setup manifest.
+    group_->set_size(kRetrofitGroupSize);
+    for (auto* partition : {sys_, vnd_, prd_}) {
+        SetSize(partition, 2_MiB);
+    }
+    AddOperationForPartitions();
+
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Test that COW image should not be created for retrofit devices; super
+    // should be big enough.
+    ASSERT_FALSE(image_manager_->BackingImageExists("sys_b-cow-img"));
+    ASSERT_FALSE(image_manager_->BackingImageExists("vnd_b-cow-img"));
+    ASSERT_FALSE(image_manager_->BackingImageExists("prd_b-cow-img"));
+
+    // Write some data to target partitions.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(WriteSnapshotAndHash(name));
+    }
+
+    // Assert that source partitions aren't affected.
+    for (const auto& name : {"sys_a", "vnd_a", "prd_a"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name));
+    }
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+}
+
+TEST_F(SnapshotUpdateTest, MergeCannotRemoveCow) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
+    // Make source partitions as big as possible to force COW image to be created.
+    SetSize(sys_, 5_MiB);
+    SetSize(vnd_, 5_MiB);
+    SetSize(prd_, 5_MiB);
+    src_ = MetadataBuilder::New(*opener_, "super", 0);
+    ASSERT_NE(src_, nullptr);
+    src_->RemoveGroupAndPartitions(group_->name() + "_a");
+    src_->RemoveGroupAndPartitions(group_->name() + "_b");
+    ASSERT_TRUE(FillFakeMetadata(src_.get(), manifest_, "_a"));
+    auto metadata = src_->Export();
+    ASSERT_NE(nullptr, metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *metadata.get(), 0));
+
+    // OTA client blindly unmaps all partitions that are possibly mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
+    }
+
+    // Add operations for sys. The whole device is written.
+    AddOperation(sys_);
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    // Normally we should use NewForFirstStageMount, but if so, "gsid.mapped_image.sys_b-cow-img"
+    // won't be set.
+    auto init = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+
+    // Keep an open handle to the cow device. This should cause the merge to
+    // be incomplete.
+    auto cow_path = android::base::GetProperty("gsid.mapped_image.sys_b-cow-img", "");
+    unique_fd fd(open(cow_path.c_str(), O_RDONLY | O_CLOEXEC));
+    ASSERT_GE(fd, 0);
+
+    // COW cannot be removed due to open fd, so expect a soft failure.
+    ASSERT_EQ(UpdateState::MergeNeedsReboot, init->InitiateMergeAndWait());
+
+    // Simulate shutting down the device.
+    fd.reset();
+    ASSERT_TRUE(UnmapAll());
+
+    // init does first stage mount again.
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+
+    // sys_b should be mapped as a dm-linear device directly.
+    ASSERT_FALSE(sm->IsSnapshotDevice("sys_b", nullptr));
+
+    // Merge should be able to complete now.
+    ASSERT_EQ(UpdateState::MergeCompleted, init->InitiateMergeAndWait());
+}
+
+class MetadataMountedTest : public SnapshotUpdateTest {
+  public:
+    void SetUp() override {
+        metadata_dir_ = test_device->GetMetadataDir();
+        ASSERT_TRUE(ReadDefaultFstab(&fstab_));
+    }
+    void TearDown() override {
+        SetUp();
+        // Remount /metadata
+        test_device->set_recovery(false);
+        EXPECT_TRUE(android::fs_mgr::EnsurePathMounted(&fstab_, metadata_dir_));
+    }
+    AssertionResult IsMetadataMounted() {
+        Fstab mounted_fstab;
+        if (!ReadFstabFromFile("/proc/mounts", &mounted_fstab)) {
+            ADD_FAILURE() << "Failed to scan mounted volumes";
+            return AssertionFailure() << "Failed to scan mounted volumes";
+        }
+
+        auto entry = GetEntryForPath(&fstab_, metadata_dir_);
+        if (entry == nullptr) {
+            return AssertionFailure() << "No mount point found in fstab for path " << metadata_dir_;
+        }
+
+        auto mv = GetEntryForMountPoint(&mounted_fstab, entry->mount_point);
+        if (mv == nullptr) {
+            return AssertionFailure() << metadata_dir_ << " is not mounted";
+        }
+        return AssertionSuccess() << metadata_dir_ << " is mounted";
+    }
+    std::string metadata_dir_;
+    Fstab fstab_;
+};
+
+void MountMetadata() {
+    MetadataMountedTest().TearDown();
+}
+
+TEST_F(MetadataMountedTest, Android) {
+    auto device = sm->EnsureMetadataMounted();
+    EXPECT_NE(nullptr, device);
+    device.reset();
+
+    EXPECT_TRUE(IsMetadataMounted());
+    EXPECT_TRUE(sm->CancelUpdate()) << "Metadata dir should never be unmounted in Android mode";
+}
+
+TEST_F(MetadataMountedTest, Recovery) {
+    test_device->set_recovery(true);
+    metadata_dir_ = test_device->GetMetadataDir();
+
+    EXPECT_TRUE(android::fs_mgr::EnsurePathUnmounted(&fstab_, metadata_dir_));
+    EXPECT_FALSE(IsMetadataMounted());
+
+    auto device = sm->EnsureMetadataMounted();
+    EXPECT_NE(nullptr, device);
+    EXPECT_TRUE(IsMetadataMounted());
+
+    device.reset();
+    EXPECT_FALSE(IsMetadataMounted());
+}
+
+// Test that during a merge, we can wipe data in recovery.
+TEST_F(SnapshotUpdateTest, MergeInRecovery) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+    init = nullptr;
+
+    // Initiate the merge and then immediately stop it to simulate a reboot.
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_TRUE(new_sm->InitiateMerge());
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a reboot into recovery.
+    auto test_device = std::make_unique<TestDeviceInfo>(fake_super, "_b");
+    test_device->set_recovery(true);
+    new_sm = SnapshotManager::NewForFirstStageMount(test_device.release());
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    ASSERT_EQ(new_sm->GetUpdateState(), UpdateState::None);
+}
+
+// Test that after an OTA, before a merge, we can wipe data in recovery.
+TEST_F(SnapshotUpdateTest, DataWipeRollbackInRecovery) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a reboot into recovery.
+    auto test_device = new TestDeviceInfo(fake_super, "_b");
+    test_device->set_recovery(true);
+    auto new_sm = SnapshotManager::NewForFirstStageMount(test_device);
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    // Manually mount metadata so that we can call GetUpdateState() below.
+    MountMetadata();
+    EXPECT_EQ(new_sm->GetUpdateState(), UpdateState::Unverified);
+    EXPECT_TRUE(test_device->IsSlotUnbootable(1));
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+}
+
+// Test that after an OTA and a bootloader rollback with no merge, we can wipe
+// data in recovery.
+TEST_F(SnapshotUpdateTest, DataWipeAfterRollback) {
+    // Execute the first update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate a rollback, with reboot into recovery.
+    auto test_device = new TestDeviceInfo(fake_super, "_a");
+    test_device->set_recovery(true);
+    auto new_sm = SnapshotManager::NewForFirstStageMount(test_device);
+
+    ASSERT_TRUE(new_sm->HandleImminentDataWipe());
+    EXPECT_EQ(new_sm->GetUpdateState(), UpdateState::None);
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+    EXPECT_FALSE(test_device->IsSlotUnbootable(0));
+}
+
+TEST_F(SnapshotUpdateTest, Hashtree) {
+    constexpr auto partition_size = 4_MiB;
+    constexpr auto data_size = 3_MiB;
+    constexpr auto hashtree_size = 512_KiB;
+    constexpr auto fec_size = partition_size - data_size - hashtree_size;
+
+    const auto block_size = manifest_.block_size();
+    SetSize(sys_, partition_size);
+    AddOperation(sys_, data_size);
+
+    // Set hastree extents.
+    sys_->mutable_hash_tree_data_extent()->set_start_block(0);
+    sys_->mutable_hash_tree_data_extent()->set_num_blocks(data_size / block_size);
+
+    sys_->mutable_hash_tree_extent()->set_start_block(data_size / block_size);
+    sys_->mutable_hash_tree_extent()->set_num_blocks(hashtree_size / block_size);
+
+    // Set FEC extents.
+    sys_->mutable_fec_data_extent()->set_start_block(0);
+    sys_->mutable_fec_data_extent()->set_num_blocks((data_size + hashtree_size) / block_size);
+
+    sys_->mutable_fec_extent()->set_start_block((data_size + hashtree_size) / block_size);
+    sys_->mutable_fec_extent()->set_num_blocks(fec_size / block_size);
+
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Map and write some data to target partition.
+    ASSERT_TRUE(MapUpdateSnapshots({"vnd_b", "prd_b"}));
+    ASSERT_TRUE(WriteSnapshotAndHash("sys_b", partition_size));
+
+    // Finish update.
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(init, nullptr);
+    ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+
+    // Check that the target partition have the same content. Hashtree and FEC extents
+    // should be accounted for.
+    ASSERT_TRUE(IsPartitionUnchanged("sys_b"));
+}
+
+// Test for overflow bit after update
+TEST_F(SnapshotUpdateTest, Overflow) {
+    const auto actual_write_size = GetSize(sys_);
+    const auto declared_write_size = actual_write_size - 1_MiB;
+
+    AddOperation(sys_, declared_write_size);
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Map and write some data to target partitions.
+    ASSERT_TRUE(MapUpdateSnapshots({"vnd_b", "prd_b"}));
+    ASSERT_TRUE(WriteSnapshotAndHash("sys_b", actual_write_size));
+
+    std::vector<android::dm::DeviceMapper::TargetInfo> table;
+    ASSERT_TRUE(DeviceMapper::Instance().GetTableStatus("sys_b", &table));
+    ASSERT_EQ(1u, table.size());
+    EXPECT_TRUE(table[0].IsOverflowSnapshot());
+
+    ASSERT_FALSE(sm->FinishedSnapshotWrites())
+            << "FinishedSnapshotWrites should detect overflow of CoW device.";
+}
+
+TEST_F(SnapshotUpdateTest, WaitForMerge) {
+#ifdef SKIP_TEST_IN_PRESUBMIT
+    GTEST_SKIP() << "WIP failure b/148889015";
+#endif
+    AddOperationForPartitions();
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+
+    // Write some data to target partitions.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(WriteSnapshotAndHash(name));
+    }
+
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    // After reboot, init does first stage mount.
+    {
+        auto init = SnapshotManager::NewForFirstStageMount(new TestDeviceInfo(fake_super, "_b"));
+        ASSERT_NE(nullptr, init);
+        ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+    }
+
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, "_b"));
+    ASSERT_NE(nullptr, new_sm);
+
+    auto waiter = std::async(std::launch::async, [&new_sm] { return new_sm->WaitForMerge(); });
+    ASSERT_EQ(std::future_status::timeout, waiter.wait_for(1s))
+            << "WaitForMerge should block when not initiated";
+
+    auto merger =
+            std::async(std::launch::async, [&new_sm] { return new_sm->InitiateMergeAndWait(); });
+    // Small images, so should be merged pretty quickly.
+    ASSERT_EQ(std::future_status::ready, waiter.wait_for(3s)) << "WaitForMerge did not finish";
+    ASSERT_TRUE(waiter.get());
+    ASSERT_THAT(merger.get(), AnyOf(UpdateState::None, UpdateState::MergeCompleted));
+}
+
+TEST_F(SnapshotUpdateTest, LowSpace) {
+    static constexpr auto kMaxFree = 10_MiB;
+    auto userdata = std::make_unique<LowSpaceUserdata>();
+    ASSERT_TRUE(userdata->Init(kMaxFree));
+
+    // Grow all partitions to 5_MiB, total 15_MiB. This requires 15 MiB of CoW space. After
+    // using the empty space in super (< 1 MiB), it uses at least 14 MiB of /userdata space.
+    constexpr uint64_t partition_size = 5_MiB;
+    SetSize(sys_, partition_size);
+    SetSize(vnd_, partition_size);
+    SetSize(prd_, partition_size);
+
+    AddOperationForPartitions();
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    auto res = sm->CreateUpdateSnapshots(manifest_);
+    ASSERT_FALSE(res);
+    ASSERT_EQ(Return::ErrorCode::NO_SPACE, res.error_code());
+    ASSERT_GE(res.required_size(), 14_MiB);
+    ASSERT_LT(res.required_size(), 15_MiB);
+}
+
+class FlashAfterUpdateTest : public SnapshotUpdateTest,
+                             public WithParamInterface<std::tuple<uint32_t, bool>> {
+  public:
+    AssertionResult InitiateMerge(const std::string& slot_suffix) {
+        auto sm = SnapshotManager::New(new TestDeviceInfo(fake_super, slot_suffix));
+        if (!sm->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_)) {
+            return AssertionFailure() << "Cannot CreateLogicalAndSnapshotPartitions";
+        }
+        if (!sm->InitiateMerge()) {
+            return AssertionFailure() << "Cannot initiate merge";
+        }
+        return AssertionSuccess();
+    }
+};
+
+TEST_P(FlashAfterUpdateTest, FlashSlotAfterUpdate) {
+    if (!is_virtual_ab_) GTEST_SKIP() << "Test for Virtual A/B devices only";
+
+    // OTA client blindly unmaps all partitions that are possibly mapped.
+    for (const auto& name : {"sys_b", "vnd_b", "prd_b"}) {
+        ASSERT_TRUE(sm->UnmapUpdateSnapshot(name));
+    }
+
+    // Execute the update.
+    ASSERT_TRUE(sm->BeginUpdate());
+    ASSERT_TRUE(sm->CreateUpdateSnapshots(manifest_));
+    ASSERT_TRUE(MapUpdateSnapshots());
+    ASSERT_TRUE(sm->FinishedSnapshotWrites());
+
+    // Simulate shutting down the device.
+    ASSERT_TRUE(UnmapAll());
+
+    bool after_merge = std::get<1>(GetParam());
+    if (after_merge) {
+        ASSERT_TRUE(InitiateMerge("_b"));
+        // Simulate shutting down the device after merge has initiated.
+        ASSERT_TRUE(UnmapAll());
+    }
+
+    auto flashed_slot = std::get<0>(GetParam());
+    auto flashed_slot_suffix = SlotSuffixForSlotNumber(flashed_slot);
+
+    // Simulate flashing |flashed_slot|. This clears the UPDATED flag.
+    auto flashed_builder = MetadataBuilder::New(*opener_, "super", flashed_slot);
+    ASSERT_NE(flashed_builder, nullptr);
+    flashed_builder->RemoveGroupAndPartitions(group_->name() + flashed_slot_suffix);
+    flashed_builder->RemoveGroupAndPartitions(kCowGroupName);
+    ASSERT_TRUE(FillFakeMetadata(flashed_builder.get(), manifest_, flashed_slot_suffix));
+
+    // Deliberately remove a partition from this build so that
+    // InitiateMerge do not switch state to "merging". This is possible in
+    // practice because the list of dynamic partitions may change.
+    ASSERT_NE(nullptr, flashed_builder->FindPartition("prd" + flashed_slot_suffix));
+    flashed_builder->RemovePartition("prd" + flashed_slot_suffix);
+
+    // Note that fastbootd always updates the partition table of both slots.
+    auto flashed_metadata = flashed_builder->Export();
+    ASSERT_NE(nullptr, flashed_metadata);
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *flashed_metadata, 0));
+    ASSERT_TRUE(UpdatePartitionTable(*opener_, "super", *flashed_metadata, 1));
+
+    std::string path;
+    for (const auto& name : {"sys", "vnd"}) {
+        ASSERT_TRUE(CreateLogicalPartition(
+                CreateLogicalPartitionParams{
+                        .block_device = fake_super,
+                        .metadata_slot = flashed_slot,
+                        .partition_name = name + flashed_slot_suffix,
+                        .timeout_ms = 1s,
+                        .partition_opener = opener_.get(),
+                },
+                &path));
+        ASSERT_TRUE(WriteRandomData(path));
+        auto hash = GetHash(path);
+        ASSERT_TRUE(hash.has_value());
+        hashes_[name + flashed_slot_suffix] = *hash;
+    }
+
+    // Simulate shutting down the device after flash.
+    ASSERT_TRUE(UnmapAll());
+
+    // Simulate reboot. After reboot, init does first stage mount.
+    auto init = SnapshotManager::NewForFirstStageMount(
+            new TestDeviceInfo(fake_super, flashed_slot_suffix));
+    ASSERT_NE(init, nullptr);
+
+    if (flashed_slot && after_merge) {
+        ASSERT_TRUE(init->NeedSnapshotsInFirstStageMount());
+    }
+    ASSERT_TRUE(init->CreateLogicalAndSnapshotPartitions("super", snapshot_timeout_));
+
+    // Check that the target partitions have the same content.
+    for (const auto& name : {"sys", "vnd"}) {
+        ASSERT_TRUE(IsPartitionUnchanged(name + flashed_slot_suffix));
+    }
+
+    // There should be no snapshot to merge.
+    auto new_sm = SnapshotManager::New(new TestDeviceInfo(fake_super, flashed_slot_suffix));
+    ASSERT_EQ(UpdateState::Cancelled, new_sm->InitiateMergeAndWait());
+
+    // Next OTA calls CancelUpdate no matter what.
+    ASSERT_TRUE(new_sm->CancelUpdate());
+}
+
+INSTANTIATE_TEST_SUITE_P(Snapshot, FlashAfterUpdateTest, Combine(Values(0, 1), Bool()),
+                         [](const TestParamInfo<FlashAfterUpdateTest::ParamType>& info) {
+                             return "Flash"s + (std::get<0>(info.param) ? "New"s : "Old"s) +
+                                    "Slot"s + (std::get<1>(info.param) ? "After"s : "Before"s) +
+                                    "Merge"s;
+                         });
+
+// Test behavior of ImageManager::Create on low space scenario. These tests assumes image manager
+// uses /data as backup device.
+class ImageManagerTest : public SnapshotTest, public WithParamInterface<uint64_t> {
+  protected:
+    void SetUp() override {
+        if (!is_virtual_ab_) GTEST_SKIP() << "Test for Virtual A/B devices only";
+
+        SnapshotTest::SetUp();
+        userdata_ = std::make_unique<LowSpaceUserdata>();
+        ASSERT_TRUE(userdata_->Init(GetParam()));
+    }
+    void TearDown() override {
+        if (!is_virtual_ab_) return;
+
+        EXPECT_TRUE(!image_manager_->BackingImageExists(kImageName) ||
+                    image_manager_->DeleteBackingImage(kImageName));
+    }
+    static constexpr const char* kImageName = "my_image";
+    std::unique_ptr<LowSpaceUserdata> userdata_;
+};
+
+TEST_P(ImageManagerTest, CreateImageEnoughAvailSpace) {
+    if (userdata_->available_space() == 0) {
+        GTEST_SKIP() << "/data is full (" << userdata_->available_space()
+                     << " bytes available), skipping";
+    }
+    ASSERT_TRUE(image_manager_->CreateBackingImage(kImageName, userdata_->available_space(),
+                                                   IImageManager::CREATE_IMAGE_DEFAULT))
+            << "Should be able to create image with size = " << userdata_->available_space()
+            << " bytes";
+    ASSERT_TRUE(image_manager_->DeleteBackingImage(kImageName))
+            << "Should be able to delete created image";
+}
+
+TEST_P(ImageManagerTest, CreateImageNoSpace) {
+    uint64_t to_allocate = userdata_->free_space() + userdata_->bsize();
+    auto res = image_manager_->CreateBackingImage(kImageName, to_allocate,
+                                                  IImageManager::CREATE_IMAGE_DEFAULT);
+    ASSERT_FALSE(res) << "Should not be able to create image with size = " << to_allocate
+                      << " bytes because only " << userdata_->free_space() << " bytes are free";
+    ASSERT_EQ(FiemapStatus::ErrorCode::NO_SPACE, res.error_code()) << res.string();
+}
+
+std::vector<uint64_t> ImageManagerTestParams() {
+    std::vector<uint64_t> ret;
+    for (uint64_t size = 1_MiB; size <= 512_MiB; size *= 2) {
+        ret.push_back(size);
+#ifdef SKIP_TEST_IN_PRESUBMIT
+        // BUG(148889015);
+        break;
+#endif
+    }
+    return ret;
+}
+
+INSTANTIATE_TEST_SUITE_P(ImageManagerTest, ImageManagerTest, ValuesIn(ImageManagerTestParams()));
+
 }  // namespace snapshot
 }  // namespace android
 
@@ -1098,6 +1859,7 @@
     }
 
     // Clean up previous run.
+    MetadataMountedTest().TearDown();
     SnapshotUpdateTest().Cleanup();
     SnapshotTest().Cleanup();
 
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index d65320c..d724be3 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -19,9 +19,15 @@
 #include <chrono>
 #include <iostream>
 #include <map>
+#include <sstream>
 
+#include <android-base/file.h>
 #include <android-base/logging.h>
+#include <android-base/unique_fd.h>
 #include <libsnapshot/snapshot.h>
+#include "utility.h"
+
+#include "utility.h"
 
 using namespace std::string_literals;
 
@@ -31,9 +37,11 @@
                  "Actions:\n"
                  "  dump\n"
                  "    Print snapshot states.\n"
-                 "  merge [--logcat]\n"
+                 "  merge [--logcat] [--log-to-file]\n"
                  "    Initialize merge and wait for it to be completed.\n"
-                 "    If --logcat is specified, log to logcat. Otherwise, log to stdout.\n";
+                 "    If --logcat is specified, log to logcat.\n"
+                 "    If --log-to-file is specified, log to /data/misc/snapshotctl_log/.\n"
+                 "    If both specified, log to both. If none specified, log to stdout.\n";
     return EX_USAGE;
 }
 
@@ -45,39 +53,70 @@
     return SnapshotManager::New()->Dump(std::cout);
 }
 
+class FileLogger {
+  public:
+    FileLogger() {
+        static constexpr const char* kLogFilePath = "/data/misc/snapshotctl_log/";
+        std::stringstream ss;
+        ss << kLogFilePath << "snapshotctl." << Now() << ".log";
+        fd_.reset(TEMP_FAILURE_RETRY(
+                open(ss.str().c_str(),
+                     O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NOFOLLOW | O_SYNC, 0660)));
+    }
+    // Copy-contuctor needed to be converted to std::function.
+    FileLogger(const FileLogger& other) { fd_.reset(dup(other.fd_)); }
+    void operator()(android::base::LogId, android::base::LogSeverity, const char* /*tag*/,
+                    const char* /*file*/, unsigned int /*line*/, const char* message) {
+        if (fd_ == -1) return;
+        std::stringstream ss;
+        ss << Now() << ":" << message << "\n";
+        (void)android::base::WriteStringToFd(ss.str(), fd_);
+    }
+
+  private:
+    android::base::unique_fd fd_;
+};
+
+class MergeCmdLogger {
+  public:
+    MergeCmdLogger(int argc, char** argv) {
+        for (int i = 0; i < argc; ++i) {
+            if (argv[i] == "--logcat"s) {
+                loggers_.push_back(android::base::LogdLogger());
+            }
+            if (argv[i] == "--log-to-file"s) {
+                loggers_.push_back(std::move(FileLogger()));
+            }
+        }
+        if (loggers_.empty()) {
+            loggers_.push_back(&android::base::StdioLogger);
+        }
+    }
+    void operator()(android::base::LogId id, android::base::LogSeverity severity, const char* tag,
+                    const char* file, unsigned int line, const char* message) {
+        for (auto&& logger : loggers_) {
+            logger(id, severity, tag, file, line, message);
+        }
+    }
+
+  private:
+    std::vector<android::base::LogFunction> loggers_;
+};
+
 bool MergeCmdHandler(int argc, char** argv) {
     auto begin = std::chrono::steady_clock::now();
 
-    bool log_to_logcat = false;
-    for (int i = 2; i < argc; ++i) {
-        if (argv[i] == "--logcat"s) {
-            log_to_logcat = true;
-        }
-    }
-    if (log_to_logcat) {
-        android::base::InitLogging(argv);
-    } else {
-        android::base::InitLogging(argv, &android::base::StdioLogger);
-    }
+    // 'snapshotctl merge' is stripped away from arguments to
+    // Logger.
+    android::base::InitLogging(argv, MergeCmdLogger(argc - 2, argv + 2));
 
-    auto sm = SnapshotManager::New();
+    auto state = SnapshotManager::New()->InitiateMergeAndWait();
 
-    auto state = sm->GetUpdateState();
-    if (state == UpdateState::None) {
-        LOG(INFO) << "Can't find any snapshot to merge.";
+    // We could wind up in the Unverified state if the device rolled back or
+    // hasn't fully rebooted. Ignore this.
+    if (state == UpdateState::None || state == UpdateState::Unverified) {
         return true;
     }
-    if (state == UpdateState::Unverified) {
-        if (!sm->InitiateMerge()) {
-            LOG(ERROR) << "Failed to initiate merge.";
-            return false;
-        }
-    }
-
-    // All other states can be handled by ProcessUpdateState.
-    LOG(INFO) << "Waiting for any merge to complete. This can take up to 1 minute.";
-    state = SnapshotManager::New()->ProcessUpdateState();
-
     if (state == UpdateState::MergeCompleted) {
         auto end = std::chrono::steady_clock::now();
         auto passed = std::chrono::duration_cast<std::chrono::milliseconds>(end - begin).count();
diff --git a/fs_mgr/libsnapshot/snapshotctl.rc b/fs_mgr/libsnapshot/snapshotctl.rc
index 29707f1..5dbe352 100644
--- a/fs_mgr/libsnapshot/snapshotctl.rc
+++ b/fs_mgr/libsnapshot/snapshotctl.rc
@@ -1,2 +1,2 @@
 on property:sys.boot_completed=1
-    exec - root root -- /system/bin/snapshotctl merge --logcat
+    exec_background - root root -- /system/bin/snapshotctl merge --logcat --log-to-file
diff --git a/fs_mgr/libsnapshot/test_helpers.cpp b/fs_mgr/libsnapshot/test_helpers.cpp
index 539c5c5..b036606 100644
--- a/fs_mgr/libsnapshot/test_helpers.cpp
+++ b/fs_mgr/libsnapshot/test_helpers.cpp
@@ -12,10 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "test_helpers.h"
+#include <libsnapshot/test_helpers.h>
+
+#include <sys/statvfs.h>
 
 #include <android-base/file.h>
 #include <android-base/logging.h>
+#include <android-base/strings.h>
 #include <android-base/unique_fd.h>
 #include <gtest/gtest.h>
 #include <openssl/sha.h>
@@ -62,24 +65,6 @@
     return PartitionOpener::GetDeviceString(partition_name);
 }
 
-bool WriteRandomData(const std::string& path) {
-    unique_fd rand(open("/dev/urandom", O_RDONLY));
-    unique_fd fd(open(path.c_str(), O_WRONLY));
-
-    char buf[4096];
-    while (true) {
-        ssize_t n = TEMP_FAILURE_RETRY(read(rand.get(), buf, sizeof(buf)));
-        if (n <= 0) return false;
-        if (!WriteFully(fd.get(), buf, n)) {
-            if (errno == ENOSPC) {
-                return true;
-            }
-            PLOG(ERROR) << "Cannot write " << path;
-            return false;
-        }
-    }
-}
-
 std::string ToHexString(const uint8_t* buf, size_t len) {
     char lookup[] = "0123456789abcdef";
     std::string out(len * 2 + 1, '\0');
@@ -91,6 +76,47 @@
     return out;
 }
 
+bool WriteRandomData(const std::string& path, std::optional<size_t> expect_size,
+                     std::string* hash) {
+    unique_fd rand(open("/dev/urandom", O_RDONLY));
+    unique_fd fd(open(path.c_str(), O_WRONLY));
+
+    SHA256_CTX ctx;
+    if (hash) {
+        SHA256_Init(&ctx);
+    }
+
+    char buf[4096];
+    size_t total_written = 0;
+    while (!expect_size || total_written < *expect_size) {
+        ssize_t n = TEMP_FAILURE_RETRY(read(rand.get(), buf, sizeof(buf)));
+        if (n <= 0) return false;
+        if (!WriteFully(fd.get(), buf, n)) {
+            if (errno == ENOSPC) {
+                break;
+            }
+            PLOG(ERROR) << "Cannot write " << path;
+            return false;
+        }
+        total_written += n;
+        if (hash) {
+            SHA256_Update(&ctx, buf, n);
+        }
+    }
+
+    if (expect_size && total_written != *expect_size) {
+        PLOG(ERROR) << "Written " << total_written << " bytes, expected " << *expect_size;
+        return false;
+    }
+
+    if (hash) {
+        uint8_t out[32];
+        SHA256_Final(out, &ctx);
+        *hash = ToHexString(out, sizeof(out));
+    }
+    return true;
+}
+
 std::optional<std::string> GetHash(const std::string& path) {
     std::string content;
     if (!android::base::ReadFileToString(path, &content, true)) {
@@ -140,5 +166,71 @@
     partition_update->mutable_new_partition_info()->set_size(size);
 }
 
+uint64_t GetSize(PartitionUpdate* partition_update) {
+    return partition_update->mutable_new_partition_info()->size();
+}
+
+AssertionResult LowSpaceUserdata::Init(uint64_t max_free_space) {
+    auto res = ReadUserdataStats();
+    if (!res) return res;
+
+    // Try to fill up the disk as much as possible until free_space_ <= max_free_space.
+    big_file_ = std::make_unique<TemporaryFile>();
+    if (big_file_->fd == -1) {
+        return AssertionFailure() << strerror(errno);
+    }
+    if (!android::base::StartsWith(big_file_->path, kUserDataDevice)) {
+        return AssertionFailure() << "Temp file allocated to " << big_file_->path << ", not in "
+                                  << kUserDataDevice;
+    }
+    uint64_t next_consume =
+            std::min(free_space_ - max_free_space, (uint64_t)std::numeric_limits<off_t>::max());
+    off_t allocated = 0;
+    while (next_consume > 0 && free_space_ > max_free_space) {
+        int status = fallocate(big_file_->fd, 0, allocated, next_consume);
+        if (status == -1 && errno == ENOSPC) {
+            next_consume /= 2;
+            continue;
+        }
+        if (status == -1) {
+            return AssertionFailure() << strerror(errno);
+        }
+        allocated += next_consume;
+
+        res = ReadUserdataStats();
+        if (!res) return res;
+    }
+
+    LOG(INFO) << allocated << " bytes allocated to " << big_file_->path;
+    initialized_ = true;
+    return AssertionSuccess();
+}
+
+AssertionResult LowSpaceUserdata::ReadUserdataStats() {
+    struct statvfs buf;
+    if (statvfs(kUserDataDevice, &buf) == -1) {
+        return AssertionFailure() << strerror(errno);
+    }
+    bsize_ = buf.f_bsize;
+    free_space_ = buf.f_bsize * buf.f_bfree;
+    available_space_ = buf.f_bsize * buf.f_bavail;
+    return AssertionSuccess();
+}
+
+uint64_t LowSpaceUserdata::free_space() const {
+    CHECK(initialized_);
+    return free_space_;
+}
+
+uint64_t LowSpaceUserdata::available_space() const {
+    CHECK(initialized_);
+    return available_space_;
+}
+
+uint64_t LowSpaceUserdata::bsize() const {
+    CHECK(initialized_);
+    return bsize_;
+}
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/utility.cpp b/fs_mgr/libsnapshot/utility.cpp
index 66629e8..3318b33 100644
--- a/fs_mgr/libsnapshot/utility.cpp
+++ b/fs_mgr/libsnapshot/utility.cpp
@@ -14,12 +14,26 @@
 
 #include "utility.h"
 
+#include <errno.h>
+#include <time.h>
+
+#include <iomanip>
+#include <sstream>
+
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/strings.h>
+#include <fs_mgr/roots.h>
 
+using android::dm::kSectorSize;
+using android::fiemap::FiemapStatus;
+using android::fs_mgr::EnsurePathMounted;
+using android::fs_mgr::EnsurePathUnmounted;
+using android::fs_mgr::Fstab;
+using android::fs_mgr::GetEntryForPath;
 using android::fs_mgr::MetadataBuilder;
 using android::fs_mgr::Partition;
+using android::fs_mgr::ReadDefaultFstab;
 
 namespace android {
 namespace snapshot {
@@ -76,7 +90,7 @@
     }
 }
 
-bool InitializeCow(const std::string& device) {
+Return InitializeCow(const std::string& device) {
     // When the kernel creates a persistent dm-snapshot, it requires a CoW file
     // to store the modifications. The kernel interface does not specify how
     // the CoW is used, and there is no standard associated.
@@ -88,26 +102,69 @@
     // so it can be used to resume the last state of a snapshot device;
     // - an _INVALID_ snapshot otherwise.
     // To avoid zero-filling the whole CoW file when a new dm-snapshot is
-    // created, here we zero-fill only the first 32 bits. This is a temporary
-    // workaround that will be discussed again when the kernel API gets
-    // consolidated.
-    // TODO(b/139202197): Remove this hack once the kernel API is consolidated.
-    constexpr ssize_t kDmSnapZeroFillSize = 4;  // 32-bit
+    // created, here we zero-fill only the first chunk to be compliant with
+    // lvm.
+    constexpr ssize_t kDmSnapZeroFillSize = kSectorSize * kSnapshotChunkSize;
 
-    char zeros[kDmSnapZeroFillSize] = {0};
+    std::vector<uint8_t> zeros(kDmSnapZeroFillSize, 0);
     android::base::unique_fd fd(open(device.c_str(), O_WRONLY | O_BINARY));
     if (fd < 0) {
         PLOG(ERROR) << "Can't open COW device: " << device;
-        return false;
+        return Return(FiemapStatus::FromErrno(errno));
     }
 
     LOG(INFO) << "Zero-filling COW device: " << device;
-    if (!android::base::WriteFully(fd, zeros, kDmSnapZeroFillSize)) {
+    if (!android::base::WriteFully(fd, zeros.data(), kDmSnapZeroFillSize)) {
         PLOG(ERROR) << "Can't zero-fill COW device for " << device;
+        return Return(FiemapStatus::FromErrno(errno));
+    }
+    return Return::Ok();
+}
+
+std::unique_ptr<AutoUnmountDevice> AutoUnmountDevice::New(const std::string& path) {
+    Fstab fstab;
+    if (!ReadDefaultFstab(&fstab)) {
+        LOG(ERROR) << "Cannot read default fstab";
+        return nullptr;
+    }
+
+    if (GetEntryForPath(&fstab, path) == nullptr) {
+        LOG(INFO) << "EnsureMetadataMounted can't find entry for " << path << ", skipping";
+        return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice("", {}));
+    }
+
+    if (!EnsurePathMounted(&fstab, path)) {
+        LOG(ERROR) << "Cannot mount " << path;
+        return nullptr;
+    }
+    return std::unique_ptr<AutoUnmountDevice>(new AutoUnmountDevice(path, std::move(fstab)));
+}
+
+AutoUnmountDevice::~AutoUnmountDevice() {
+    if (name_.empty()) return;
+    if (!EnsurePathUnmounted(&fstab_, name_)) {
+        LOG(ERROR) << "Cannot unmount " << name_;
+    }
+}
+
+bool WriteStringToFileAtomic(const std::string& content, const std::string& path) {
+    std::string tmp_path = path + ".tmp";
+    if (!android::base::WriteStringToFile(content, tmp_path)) {
+        return false;
+    }
+    if (rename(tmp_path.c_str(), path.c_str()) == -1) {
+        PLOG(ERROR) << "rename failed from " << tmp_path << " to " << path;
         return false;
     }
     return true;
 }
 
+std::ostream& operator<<(std::ostream& os, const Now&) {
+    struct tm now;
+    time_t t = time(nullptr);
+    localtime_r(&t, &now);
+    return os << std::put_time(&now, "%Y%m%d-%H%M%S");
+}
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/utility.h b/fs_mgr/libsnapshot/utility.h
index 3051184..90ad0fe 100644
--- a/fs_mgr/libsnapshot/utility.h
+++ b/fs_mgr/libsnapshot/utility.h
@@ -15,34 +15,26 @@
 #pragma once
 
 #include <functional>
+#include <iostream>
 #include <string>
 
 #include <android-base/macros.h>
+#include <fstab/fstab.h>
 #include <libdm/dm.h>
 #include <libfiemap/image_manager.h>
 #include <liblp/builder.h>
 #include <libsnapshot/snapshot.h>
 #include <update_engine/update_metadata.pb.h>
 
+#include <libsnapshot/auto_device.h>
+#include <libsnapshot/snapshot.h>
+
 namespace android {
 namespace snapshot {
 
 // Unit is sectors, this is a 4K chunk.
 static constexpr uint32_t kSnapshotChunkSize = 8;
 
-struct AutoDevice {
-    virtual ~AutoDevice(){};
-    void Release();
-
-  protected:
-    AutoDevice(const std::string& name) : name_(name) {}
-    std::string name_;
-
-  private:
-    DISALLOW_COPY_AND_ASSIGN(AutoDevice);
-    AutoDevice(AutoDevice&& other) = delete;
-};
-
 // A list of devices we created along the way.
 // - Whenever a device is created that is subject to GC'ed at the end of
 //   this function, add it to this list.
@@ -103,12 +95,35 @@
     SnapshotManager::LockedFile* lock_ = nullptr;
 };
 
+struct AutoUnmountDevice : AutoDevice {
+    // Empty object that does nothing.
+    AutoUnmountDevice() : AutoDevice("") {}
+    static std::unique_ptr<AutoUnmountDevice> New(const std::string& path);
+    ~AutoUnmountDevice();
+
+  private:
+    AutoUnmountDevice(const std::string& path, android::fs_mgr::Fstab&& fstab)
+        : AutoDevice(path), fstab_(std::move(fstab)) {}
+    android::fs_mgr::Fstab fstab_;
+};
+
 // Return a list of partitions in |builder| with the name ending in |suffix|.
 std::vector<android::fs_mgr::Partition*> ListPartitionsWithSuffix(
         android::fs_mgr::MetadataBuilder* builder, const std::string& suffix);
 
 // Initialize a device before using it as the COW device for a dm-snapshot device.
-bool InitializeCow(const std::string& device);
+Return InitializeCow(const std::string& device);
+
+// "Atomically" write string to file. This is done by a series of actions:
+// 1. Write to path + ".tmp"
+// 2. Move temporary file to path using rename()
+// Note that rename() is an atomic operation. This function may not work properly if there
+// is an open fd to |path|, because that fd has an old view of the file.
+bool WriteStringToFileAtomic(const std::string& content, const std::string& path);
+
+// Writes current time to a given stream.
+struct Now {};
+std::ostream& operator<<(std::ostream& os, const Now&);
 
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libstorage_literals/Android.bp b/fs_mgr/libstorage_literals/Android.bp
index 11611dd..beb18ef 100644
--- a/fs_mgr/libstorage_literals/Android.bp
+++ b/fs_mgr/libstorage_literals/Android.bp
@@ -2,5 +2,6 @@
 cc_library_headers {
     name: "libstorage_literals_headers",
     host_supported: true,
+    recovery_available: true,
     export_include_dirs: ["."],
 }
diff --git a/fs_mgr/libvbmeta/Android.bp b/fs_mgr/libvbmeta/Android.bp
index 937e0f3..bceabab 100644
--- a/fs_mgr/libvbmeta/Android.bp
+++ b/fs_mgr/libvbmeta/Android.bp
@@ -37,6 +37,7 @@
 cc_test_host {
     name: "libvbmeta_test",
     static_libs: [
+        "liblog",
         "libsparse",
         "libvbmeta",
         "libz",
diff --git a/fs_mgr/libvbmeta/builder.cpp b/fs_mgr/libvbmeta/builder.cpp
index a901a4f..e6576ce 100644
--- a/fs_mgr/libvbmeta/builder.cpp
+++ b/fs_mgr/libvbmeta/builder.cpp
@@ -40,18 +40,18 @@
 Result<void> SuperVBMetaBuilder::Build() {
     for (const auto& [vbmeta_name, file_path] : images_path_) {
         Result<std::string> content = ReadVBMetaImageFromFile(file_path);
-        if (!content) {
+        if (!content.ok()) {
             return content.error();
         }
 
         Result<uint8_t> vbmeta_index = AddVBMetaImage(vbmeta_name);
-        if (!vbmeta_index) {
+        if (!vbmeta_index.ok()) {
             return vbmeta_index.error();
         }
 
         Result<void> rv_export_vbmeta_image =
                 ExportVBMetaImageToFile(vbmeta_index.value(), content.value());
-        if (!rv_export_vbmeta_image) {
+        if (!rv_export_vbmeta_image.ok()) {
             return rv_export_vbmeta_image;
         }
     }
@@ -65,7 +65,7 @@
     }
 
     Result<uint64_t> file_size = GetFileSize(source_fd);
-    if (!file_size) {
+    if (!file_size.ok()) {
         return file_size.error();
     }
 
@@ -98,7 +98,7 @@
         slot_number = desc->vbmeta_index;
     } else {
         Result<uint8_t> new_slot = GetEmptySlot();
-        if (!new_slot) {
+        if (!new_slot.ok()) {
             return new_slot;
         }
         slot_number = new_slot.value();
@@ -162,7 +162,7 @@
 
     android::base::Result<void> rv_write_primary_vbmeta_table =
             WritePrimaryVBMetaTable(super_vbmeta_fd_, serialized_table);
-    if (!rv_write_primary_vbmeta_table) {
+    if (!rv_write_primary_vbmeta_table.ok()) {
         return rv_write_primary_vbmeta_table;
     }
 
@@ -175,7 +175,7 @@
                                                          const std::string& vbmeta_image) {
     Result<void> rv_write_vbmeta_image =
             WriteVBMetaImage(super_vbmeta_fd_, vbmeta_index, vbmeta_image);
-    if (!rv_write_vbmeta_image) {
+    if (!rv_write_vbmeta_image.ok()) {
         return rv_write_vbmeta_image;
     }
 
@@ -196,13 +196,13 @@
     SuperVBMetaBuilder builder(super_vbmeta_fd, images_path);
 
     Result<void> rv_build = builder.Build();
-    if (!rv_build) {
+    if (!rv_build.ok()) {
         LERROR << rv_build.error();
         return false;
     }
 
     Result<void> rv_export = builder.ExportVBMetaTableToFile();
-    if (!rv_export) {
+    if (!rv_export.ok()) {
         LERROR << rv_export.error();
         return false;
     }
@@ -211,4 +211,4 @@
 }
 
 }  // namespace fs_mgr
-}  // namespace android
\ No newline at end of file
+}  // namespace android
diff --git a/fs_mgr/libvbmeta/builder_test.cpp b/fs_mgr/libvbmeta/builder_test.cpp
index 9a015fd..487bece 100644
--- a/fs_mgr/libvbmeta/builder_test.cpp
+++ b/fs_mgr/libvbmeta/builder_test.cpp
@@ -26,24 +26,20 @@
     std::unique_ptr<SuperVBMetaBuilder> builder = std::make_unique<SuperVBMetaBuilder>();
     ASSERT_NE(builder, nullptr);
 
-    Result<uint8_t> vbmeta_index = builder->AddVBMetaImage("vbmeta" /* vbmeta_name */
-    );
-    EXPECT_TRUE(vbmeta_index);
+    Result<uint8_t> vbmeta_index = builder->AddVBMetaImage("vbmeta" /* vbmeta_name */);
+    EXPECT_RESULT_OK(vbmeta_index);
 
-    Result<uint8_t> vbmeta_system_slot = builder->AddVBMetaImage("vbmeta_system" /* vbmeta_name */
-    );
-    EXPECT_TRUE(vbmeta_system_slot);
+    Result<uint8_t> vbmeta_system_slot = builder->AddVBMetaImage("vbmeta_system" /* vbmeta_name */);
+    EXPECT_RESULT_OK(vbmeta_system_slot);
 
-    Result<uint8_t> vbmeta_vendor_slot = builder->AddVBMetaImage("vbmeta_vendor" /* vbmeta_name */
-    );
-    EXPECT_TRUE(vbmeta_vendor_slot);
+    Result<uint8_t> vbmeta_vendor_slot = builder->AddVBMetaImage("vbmeta_vendor" /* vbmeta_name */);
+    EXPECT_RESULT_OK(vbmeta_vendor_slot);
 
-    builder->DeleteVBMetaImage("vbmeta_system" /* vbmeta_name */
-    );
+    builder->DeleteVBMetaImage("vbmeta_system" /* vbmeta_name */);
 
-    Result<uint8_t> vbmeta_product_slot = builder->AddVBMetaImage("vbmeta_product" /* vbmeta_name */
-    );
-    EXPECT_TRUE(vbmeta_product_slot);
+    Result<uint8_t> vbmeta_product_slot =
+            builder->AddVBMetaImage("vbmeta_product" /* vbmeta_name */);
+    EXPECT_RESULT_OK(vbmeta_product_slot);
 
     std::unique_ptr<VBMetaTable> table = builder->ExportVBMetaTable();
     ASSERT_NE(table, nullptr);
@@ -77,4 +73,4 @@
     for (int i = 0; i < sizeof(table->descriptors[2].reserved); i++)
         EXPECT_EQ(table->descriptors[2].reserved[i], 0);
     EXPECT_EQ(table->descriptors[2].vbmeta_name, "vbmeta_product");
-}
\ No newline at end of file
+}
diff --git a/fs_mgr/libvbmeta/reader.cpp b/fs_mgr/libvbmeta/reader.cpp
index 212d186..7b5ed93 100644
--- a/fs_mgr/libvbmeta/reader.cpp
+++ b/fs_mgr/libvbmeta/reader.cpp
@@ -64,7 +64,7 @@
     }
 
     Result<void> rv_header = LoadAndVerifySuperVBMetaHeader(header_buffer.get(), &table->header);
-    if (!rv_header) {
+    if (!rv_header.ok()) {
         return rv_header;
     }
 
@@ -104,7 +104,7 @@
 Result<void> ValidateVBMetaImage(int super_vbmeta_fd, int vbmeta_index,
                                  const std::string& vbmeta_image) {
     Result<std::string> content = ReadVBMetaImage(super_vbmeta_fd, vbmeta_index);
-    if (!content) {
+    if (!content.ok()) {
         return content.error();
     }
 
diff --git a/fs_mgr/libvbmeta/super_vbmeta_test.cpp b/fs_mgr/libvbmeta/super_vbmeta_test.cpp
index 6b4fc5d..daed0d1 100644
--- a/fs_mgr/libvbmeta/super_vbmeta_test.cpp
+++ b/fs_mgr/libvbmeta/super_vbmeta_test.cpp
@@ -77,7 +77,7 @@
     android::base::unique_fd fd(open(file.c_str(), O_RDONLY | O_CLOEXEC));
     EXPECT_GT(fd, 0);
     Result<uint64_t> file_size = GetFileSize(fd);
-    EXPECT_TRUE(file_size);
+    EXPECT_RESULT_OK(file_size);
     std::unique_ptr<uint8_t[]> buffer = std::make_unique<uint8_t[]>(VBMETA_IMAGE_MAX_SIZE);
     EXPECT_TRUE(android::base::ReadFully(fd, buffer.get(), file_size.value()));
     return std::string(reinterpret_cast<char*>(buffer.get()), VBMETA_IMAGE_MAX_SIZE);
@@ -138,15 +138,15 @@
 
     // Check the size of vbmeta table
     Result<uint64_t> super_vbmeta_size = GetFileSize(fd);
-    EXPECT_TRUE(super_vbmeta_size);
+    EXPECT_RESULT_OK(super_vbmeta_size);
     EXPECT_EQ(super_vbmeta_size.value(),
               SUPER_VBMETA_TABLE_MAX_SIZE * 2 + VBMETA_IMAGE_MAX_SIZE * 3);
 
     // Check Primary vbmeta table is equal to Backup one
     VBMetaTable table;
-    EXPECT_TRUE(android::fs_mgr::ReadPrimaryVBMetaTable(fd, &table));
+    EXPECT_RESULT_OK(android::fs_mgr::ReadPrimaryVBMetaTable(fd, &table));
     VBMetaTable table_backup;
-    EXPECT_TRUE(android::fs_mgr::ReadBackupVBMetaTable(fd, &table_backup));
+    EXPECT_RESULT_OK(android::fs_mgr::ReadBackupVBMetaTable(fd, &table_backup));
     EXPECT_EQ(android::fs_mgr::SerializeVBMetaTable(table),
               android::fs_mgr::SerializeVBMetaTable(table_backup));
 
@@ -167,25 +167,25 @@
     EXPECT_EQ(table.descriptors[0].vbmeta_name_length, 14);
     EXPECT_EQ(table.descriptors[0].vbmeta_name, "vbmeta_product");
     Result<std::string> vbmeta_product_content = ReadVBMetaImage(fd, 0);
-    EXPECT_TRUE(vbmeta_product_content);
+    EXPECT_RESULT_OK(vbmeta_product_content);
     EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_product_path), vbmeta_product_content.value());
 
     EXPECT_EQ(table.descriptors[1].vbmeta_index, 1);
     EXPECT_EQ(table.descriptors[1].vbmeta_name_length, 13);
     EXPECT_EQ(table.descriptors[1].vbmeta_name, "vbmeta_system");
     Result<std::string> vbmeta_system_content = ReadVBMetaImage(fd, 1);
-    EXPECT_TRUE(vbmeta_system_content);
+    EXPECT_RESULT_OK(vbmeta_system_content);
     EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_system_path), vbmeta_system_content.value());
 
     EXPECT_EQ(table.descriptors[2].vbmeta_index, 2);
     EXPECT_EQ(table.descriptors[2].vbmeta_name_length, 13);
     EXPECT_EQ(table.descriptors[2].vbmeta_name, "vbmeta_vendor");
     Result<std::string> vbmeta_vendor_content = ReadVBMetaImage(fd, 2);
-    EXPECT_TRUE(vbmeta_vendor_content);
+    EXPECT_RESULT_OK(vbmeta_vendor_content);
     EXPECT_EQ(ReadVBMetaImageFromFile(vbmeta_vendor_path), vbmeta_vendor_content.value());
 }
 
 int main(int argc, char** argv) {
     ::testing::InitGoogleTest(&argc, argv);
     return RUN_ALL_TESTS();
-}
\ No newline at end of file
+}
diff --git a/fs_mgr/tests/Android.bp b/fs_mgr/tests/Android.bp
index 83668e9..4f6ec5a 100644
--- a/fs_mgr/tests/Android.bp
+++ b/fs_mgr/tests/Android.bp
@@ -13,8 +13,21 @@
 // limitations under the License.
 
 cc_test {
-    name: "fs_mgr_unit_test",
-    test_suites: ["device-tests"],
+    name: "CtsFsMgrTestCases",
+    test_suites: [
+        "cts",
+        "device-tests",
+        "vts",
+    ],
+    compile_multilib: "both",
+    multilib: {
+        lib32: {
+            suffix: "32",
+        },
+        lib64: {
+            suffix: "64",
+        },
+    },
 
     shared_libs: [
         "libbase",
diff --git a/fs_mgr/tests/AndroidTest.xml b/fs_mgr/tests/AndroidTest.xml
new file mode 100644
index 0000000..0ff8995
--- /dev/null
+++ b/fs_mgr/tests/AndroidTest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS fs_mgr test cases">
+    <option name="test-suite-tag" value="cts" />
+    <option name="config-descriptor:metadata" key="component" value="systems" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="CtsFsMgrTestCases->/data/local/tmp/CtsFsMgrTestCases" />
+        <option name="append-bitness" value="true" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.GTest" >
+        <option name="native-test-device-path" value="/data/local/tmp" />
+        <option name="module-name" value="CtsFsMgrTestCases" />
+        <option name="runtime-hint" value="65s" />
+    </test>
+</configuration>
diff --git a/fs_mgr/tests/adb-remount-test.sh b/fs_mgr/tests/adb-remount-test.sh
index 4226e95..e364436 100755
--- a/fs_mgr/tests/adb-remount-test.sh
+++ b/fs_mgr/tests/adb-remount-test.sh
@@ -474,20 +474,9 @@
       if [ 0 != ${counter} ]; then
         adb_wait
       fi
-      if [ -n "`get_property sys.boot.reason`" ]
-      then
-        vals=`get_property |
-              sed -n 's/[[]sys[.]\(boot_completed\|logbootcomplete\)[]]: [[]\([01]\)[]]$/\1=\2/p'`
-        if [ "${vals}" = "`echo boot_completed=1 ; echo logbootcomplete=1`" ]
-        then
-          sleep 1
-          break
-        fi
-        if [ "${vals}" = "`echo logbootcomplete=1 ; echo boot_completed=1`" ]
-        then
-          sleep 1
-          break
-        fi
+      if [ "1" = "`get_property sys.boot_completed`" ]; then
+        sleep 1
+        break
       fi
     fi
     counter=`expr ${counter} + 1`
@@ -858,7 +847,7 @@
 USB_SERIAL=
 [ -z "${ANDROID_SERIAL}" ] || USB_SERIAL=`find /sys/devices -name serial |
                                           grep usb |
-                                          xargs grep -l ${ANDROID_SERIAL}`
+                                          xargs -r grep -l ${ANDROID_SERIAL}`
 USB_ADDRESS=
 if [ -n "${USB_SERIAL}" ]; then
   USB_ADDRESS=${USB_SERIAL%/serial}
@@ -1160,13 +1149,16 @@
 ret=${?}
 uses_dynamic_scratch=false
 scratch_partition=
+virtual_ab=`get_property ro.virtual_ab.enabled`
 if ${overlayfs_needed}; then
   if [ ${ret} != 0 ]; then
     die -t ${T} "overlay takeover failed"
   fi
   echo "${D}" | grep "^overlay .* /system\$" >/dev/null ||
    echo "${ORANGE}[  WARNING ]${NORMAL} overlay takeover not complete" >&2
-  scratch_partition=scratch
+  if [ -z "${virtual_ab}" ]; then
+    scratch_partition=scratch
+  fi
   if echo "${D}" | grep " /mnt/scratch" >/dev/null; then
     echo "${BLUE}[     INFO ]${NORMAL} using ${scratch_partition} dynamic partition for overrides" >&2
   fi
diff --git a/fs_mgr/tests/fs_mgr_test.cpp b/fs_mgr/tests/fs_mgr_test.cpp
index a7ea817..800ad7e 100644
--- a/fs_mgr/tests/fs_mgr_test.cpp
+++ b/fs_mgr/tests/fs_mgr_test.cpp
@@ -179,6 +179,7 @@
                 {"nodiratime", MS_NODIRATIME},
                 {"ro", MS_RDONLY},
                 {"rw", 0},
+                {"sync", MS_SYNCHRONOUS},
                 {"remount", MS_REMOUNT},
                 {"bind", MS_BIND},
                 {"rec", MS_REC},
@@ -197,7 +198,7 @@
         if (!(entry.flags & MS_RDONLY)) {
             fs_options.emplace("rw");
         }
-        EXPECT_EQ(mnt_opts, fs_options);
+        EXPECT_EQ(mnt_opts, fs_options) << "At line " << i;
         ++i;
     }
     EXPECT_EQ(i, fstab.size());
@@ -412,7 +413,7 @@
         EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
     }
     EXPECT_EQ("", entry->key_loc);
-    EXPECT_EQ("", entry->key_dir);
+    EXPECT_EQ("", entry->metadata_key_dir);
     EXPECT_EQ(0, entry->length);
     EXPECT_EQ("", entry->label);
     EXPECT_EQ(-1, entry->partnum);
@@ -420,8 +421,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -440,7 +440,7 @@
         EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
     }
     EXPECT_EQ("", entry->key_loc);
-    EXPECT_EQ("", entry->key_dir);
+    EXPECT_EQ("", entry->metadata_key_dir);
     EXPECT_EQ(0, entry->length);
     EXPECT_EQ("", entry->label);
     EXPECT_EQ(-1, entry->partnum);
@@ -448,8 +448,7 @@
     EXPECT_EQ(0, entry->max_comp_streams);
     EXPECT_EQ(0, entry->zram_size);
     EXPECT_EQ(0, entry->reserved_size);
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
+    EXPECT_EQ("", entry->encryption_options);
     EXPECT_EQ(0, entry->erase_blk_size);
     EXPECT_EQ(0, entry->logical_blk_size);
     EXPECT_EQ("", entry->sysfs_path);
@@ -458,16 +457,14 @@
     EXPECT_EQ("", entry->zram_backing_dev_path);
     entry++;
 
-    // forcefdeorfbe sets file_contents_mode and file_names_mode by default, so test it separately.
+    // forcefdeorfbe has its own encryption_options defaults, so test it separately.
     EXPECT_EQ("none2", entry->mount_point);
     {
         FstabEntry::FsMgrFlags flags = {};
         flags.force_fde_or_fbe = true;
         EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
     }
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
     EXPECT_EQ("", entry->key_loc);
 }
 
@@ -681,37 +678,21 @@
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
 
     EXPECT_EQ("/dir/key", entry->key_loc);
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_FileEncryption) {
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
     std::string fstab_contents = R"fs(
-source none0       swap   defaults      fileencryption=blah
-source none1       swap   defaults      fileencryption=software
-source none2       swap   defaults      fileencryption=aes-256-xts
-source none3       swap   defaults      fileencryption=adiantum
-source none4       swap   defaults      fileencryption=adiantum:aes-256-heh
-source none5       swap   defaults      fileencryption=ice
-source none6       swap   defaults      fileencryption=ice:blah
-source none7       swap   defaults      fileencryption=ice:aes-256-cts
-source none8       swap   defaults      fileencryption=ice:aes-256-heh
-source none9       swap   defaults      fileencryption=ice:adiantum
-source none10      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v1
-source none11      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v2
-source none12      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v2:
-source none13      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:blah
-source none14      swap   defaults      fileencryption=aes-256-xts:aes-256-cts:vblah
+source none0       swap   defaults      fileencryption=aes-256-xts:aes-256-cts:v1
 )fs";
 
     ASSERT_TRUE(android::base::WriteStringToFile(fstab_contents, tf.path));
 
     Fstab fstab;
     EXPECT_TRUE(ReadFstabFromFile(tf.path, &fstab));
-    ASSERT_EQ(15U, fstab.size());
+    ASSERT_EQ(1U, fstab.size());
 
     FstabEntry::FsMgrFlags flags = {};
     flags.file_encryption = true;
@@ -719,107 +700,7 @@
     auto entry = fstab.begin();
     EXPECT_EQ("none0", entry->mount_point);
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none1", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none2", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none3", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none4", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("adiantum", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none5", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none6", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none7", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none8", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-heh", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none9", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("ice", entry->file_contents_mode);
-    EXPECT_EQ("adiantum", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none10", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(1, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none11", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(2, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none12", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("", entry->file_contents_mode);
-    EXPECT_EQ("", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none13", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
-
-    entry++;
-    EXPECT_EQ("none14", entry->mount_point);
-    EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
-    EXPECT_EQ("aes-256-xts", entry->file_contents_mode);
-    EXPECT_EQ("aes-256-cts", entry->file_names_mode);
-    EXPECT_EQ(0, entry->file_policy_version);
+    EXPECT_EQ("aes-256-xts:aes-256-cts:v1", entry->encryption_options);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_MaxCompStreams) {
@@ -1011,7 +892,24 @@
     FstabEntry::FsMgrFlags flags = {};
     EXPECT_TRUE(CompareFlags(flags, entry->fs_mgr_flags));
 
-    EXPECT_EQ("/dir/key", entry->key_dir);
+    EXPECT_EQ("/dir/key", entry->metadata_key_dir);
+}
+
+TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_MetadataCipher) {
+    TemporaryFile tf;
+    ASSERT_TRUE(tf.fd != -1);
+    std::string fstab_contents = R"fs(
+source none0       swap   defaults      keydirectory=/dir/key,metadata_cipher=adiantum
+)fs";
+
+    ASSERT_TRUE(android::base::WriteStringToFile(fstab_contents, tf.path));
+
+    Fstab fstab;
+    EXPECT_TRUE(ReadFstabFromFile(tf.path, &fstab));
+    ASSERT_EQ(1U, fstab.size());
+
+    auto entry = fstab.begin();
+    EXPECT_EQ("adiantum", entry->metadata_cipher);
 }
 
 TEST(fs_mgr, ReadFstabFromFile_FsMgrOptions_SysfsPath) {
@@ -1081,3 +979,21 @@
     EXPECT_EQ("none5", entry->mount_point);
     EXPECT_EQ("/dev/path2", entry->zram_backing_dev_path);
 }
+
+TEST(fs_mgr, DefaultFstabContainsUserdata) {
+    Fstab fstab;
+    ASSERT_TRUE(ReadDefaultFstab(&fstab)) << "Failed to read default fstab";
+    ASSERT_NE(nullptr, GetEntryForMountPoint(&fstab, "/data"))
+            << "Default fstab doesn't contain /data entry";
+}
+
+TEST(fs_mgr, UserdataMountedFromDefaultFstab) {
+    if (getuid() != 0) {
+        GTEST_SKIP() << "Must be run as root.";
+        return;
+    }
+    Fstab fstab;
+    ASSERT_TRUE(ReadDefaultFstab(&fstab)) << "Failed to read default fstab";
+    ASSERT_NE(nullptr, GetMountedEntryForUserdata(&fstab))
+            << "/data wasn't mounted from default fstab";
+}
diff --git a/healthd/Android.bp b/healthd/Android.bp
index 4f89bfb..14d46b3 100644
--- a/healthd/Android.bp
+++ b/healthd/Android.bp
@@ -17,6 +17,10 @@
     shared_libs: [
         "libutils",
         "libbase",
+
+        // Need latest HealthInfo definition from headers of this shared
+        // library. Clients don't need to link to this.
+        "android.hardware.health@2.1",
     ],
     header_libs: ["libhealthd_headers"],
     export_header_lib_headers: ["libhealthd_headers"],
@@ -85,6 +89,7 @@
 
 cc_library_static {
     name: "libhealthd_charger_nops",
+    recovery_available: true,
 
     srcs: [
         "healthd_mode_charger_nops.cpp",
@@ -100,17 +105,19 @@
     ],
 
     static_libs: [
-        "android.hardware.health@2.0-impl",
+        "libhealthloop",
+        "libhealth2impl",
     ],
 
     shared_libs: [
-        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
         "libutils",
     ],
 }
 
 sysprop_library {
     name: "charger_sysprop",
+    recovery_available: true,
     srcs: ["charger.sysprop"],
     property_owner: "Platform",
     api_packages: ["android.sysprop"],
@@ -137,16 +144,16 @@
     export_include_dirs: [".", "include"],
 
     static_libs: [
-        "android.hardware.health@2.0-impl",
         "android.hardware.health@1.0-convert",
         "libcharger_sysprop",
-        "libhealthstoragedefault",
         "libhealthd_draw",
+        "libhealthloop",
+        "libhealth2impl",
         "libminui",
     ],
 
     shared_libs: [
-        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
         "libbase",
         "libcutils",
         "liblog",
@@ -160,3 +167,76 @@
         "AnimationParser.cpp",
     ],
 }
+
+cc_defaults {
+    name: "charger_defaults",
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+
+    shared_libs: [
+        // common
+        "android.hardware.health@2.0",
+        "android.hardware.health@2.1",
+        "libbase",
+        "libcutils",
+        "libhidlbase",
+        "liblog",
+        "libutils",
+
+        // system charger only
+        "libpng",
+    ],
+
+    static_libs: [
+        // common
+        "android.hardware.health@1.0-convert",
+        "libbatterymonitor",
+        "libcharger_sysprop",
+        "libhealthd_charger_nops",
+        "libhealthloop",
+        "libhealth2impl",
+
+        // system charger only
+        "libhealthd_draw",
+        "libhealthd_charger",
+        "libminui",
+        "libsuspend",
+    ],
+}
+
+cc_binary {
+    name: "charger",
+    defaults: ["charger_defaults"],
+    recovery_available: true,
+    srcs: [
+        "charger.cpp",
+        "charger_utils.cpp",
+    ],
+
+    target: {
+        recovery: {
+            // No UI and libsuspend for recovery charger.
+            cflags: [
+                "-DCHARGER_FORCE_NO_UI=1",
+            ],
+            exclude_shared_libs: [
+                "libpng",
+            ],
+            exclude_static_libs: [
+                "libhealthd_draw",
+                "libhealthd_charger",
+                "libminui",
+                "libsuspend",
+            ],
+        }
+    }
+}
+
+cc_test {
+    name: "charger_test",
+    defaults: ["charger_defaults"],
+    srcs: ["charger_test.cpp"],
+}
diff --git a/healthd/Android.mk b/healthd/Android.mk
index 66ff399..4b09cf8 100644
--- a/healthd/Android.mk
+++ b/healthd/Android.mk
@@ -2,112 +2,10 @@
 
 LOCAL_PATH := $(call my-dir)
 
-### charger ###
-include $(CLEAR_VARS)
 ifeq ($(strip $(BOARD_CHARGER_NO_UI)),true)
 LOCAL_CHARGER_NO_UI := true
 endif
 
-LOCAL_SRC_FILES := \
-    charger.cpp \
-
-LOCAL_MODULE := charger
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-
-LOCAL_CFLAGS := -Werror
-
-CHARGER_STATIC_LIBRARIES := \
-    android.hardware.health@2.0-impl \
-    android.hardware.health@1.0-convert \
-    libbinderthreadstate \
-    libcharger_sysprop \
-    libhidlbase \
-    libhealthstoragedefault \
-    libminui \
-    libvndksupport \
-    libhealthd_charger \
-    libhealthd_charger_nops \
-    libhealthd_draw \
-    libbatterymonitor \
-
-CHARGER_SHARED_LIBRARIES := \
-    android.hardware.health@2.0 \
-    libbase \
-    libcutils \
-    libjsoncpp \
-    libpng \
-    libprocessgroup \
-    liblog \
-    libutils \
-
-CHARGER_SHARED_LIBRARIES += libsuspend
-
-LOCAL_STATIC_LIBRARIES := $(CHARGER_STATIC_LIBRARIES)
-LOCAL_SHARED_LIBRARIES := $(CHARGER_SHARED_LIBRARIES)
-
-LOCAL_HAL_STATIC_LIBRARIES := libhealthd
-
-# Symlink /charger to /system/bin/charger
-LOCAL_POST_INSTALL_CMD := $(hide) mkdir -p $(TARGET_ROOT_OUT) \
-    && ln -sf /system/bin/charger $(TARGET_ROOT_OUT)/charger
-
-include $(BUILD_EXECUTABLE)
-
-### charger.recovery ###
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
-    charger.cpp \
-
-LOCAL_MODULE := charger.recovery
-LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/system/bin
-LOCAL_MODULE_STEM := charger
-
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-LOCAL_CFLAGS := -Wall -Werror -DCHARGER_FORCE_NO_UI=1
-
-# charger.recovery doesn't link against libhealthd_{charger,draw} or libminui, since it doesn't need
-# any UI support.
-LOCAL_STATIC_LIBRARIES := \
-    android.hardware.health@2.0-impl \
-    android.hardware.health@1.0-convert \
-    libbinderthreadstate \
-    libcharger_sysprop \
-    libhidlbase \
-    libhealthstoragedefault \
-    libvndksupport \
-    libhealthd_charger_nops \
-    libbatterymonitor \
-
-# These shared libs will be installed to recovery image because of the dependency in `recovery`
-# module.
-LOCAL_SHARED_LIBRARIES := \
-    android.hardware.health@2.0 \
-    libbase \
-    libcutils \
-    liblog \
-    libutils \
-
-# The use of LOCAL_HAL_STATIC_LIBRARIES prevents from building this module with Android.bp.
-LOCAL_HAL_STATIC_LIBRARIES := libhealthd
-
-include $(BUILD_EXECUTABLE)
-
-### charger_test ###
-include $(CLEAR_VARS)
-LOCAL_MODULE := charger_test
-LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
-LOCAL_CFLAGS := -Wall -Werror
-LOCAL_STATIC_LIBRARIES := $(CHARGER_STATIC_LIBRARIES)
-LOCAL_SHARED_LIBRARIES := $(CHARGER_SHARED_LIBRARIES)
-LOCAL_SRC_FILES := \
-    charger_test.cpp \
-
-include $(BUILD_EXECUTABLE)
-
-CHARGER_STATIC_LIBRARIES :=
-CHARGER_SHARED_LIBRARIES :=
-
 ### charger_res_images ###
 ifneq ($(strip $(LOCAL_CHARGER_NO_UI)),true)
 define _add-charger-image
diff --git a/healthd/BatteryMonitor.cpp b/healthd/BatteryMonitor.cpp
index 06c8176..7caf468 100644
--- a/healthd/BatteryMonitor.cpp
+++ b/healthd/BatteryMonitor.cpp
@@ -29,10 +29,12 @@
 
 #include <algorithm>
 #include <memory>
+#include <optional>
 
 #include <android-base/file.h>
 #include <android-base/parseint.h>
 #include <android-base/strings.h>
+#include <android/hardware/health/2.1/types.h>
 #include <batteryservice/BatteryService.h>
 #include <cutils/klog.h>
 #include <cutils/properties.h>
@@ -47,97 +49,126 @@
 #define MILLION 1.0e6
 #define DEFAULT_VBUS_VOLTAGE 5000000
 
+using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+using HealthInfo_2_0 = android::hardware::health::V2_0::HealthInfo;
+using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
+using android::hardware::health::V1_0::BatteryHealth;
+using android::hardware::health::V1_0::BatteryStatus;
+using android::hardware::health::V2_1::BatteryCapacityLevel;
+
 namespace android {
 
-struct sysfsStringEnumMap {
+template <typename T>
+struct SysfsStringEnumMap {
     const char* s;
-    int val;
+    T val;
 };
 
-static int mapSysfsString(const char* str,
-                          struct sysfsStringEnumMap map[]) {
+template <typename T>
+static std::optional<T> mapSysfsString(const char* str, SysfsStringEnumMap<T> map[]) {
     for (int i = 0; map[i].s; i++)
         if (!strcmp(str, map[i].s))
             return map[i].val;
 
-    return -1;
+    return std::nullopt;
 }
 
-static void initBatteryProperties(BatteryProperties* props) {
-    props->chargerAcOnline = false;
-    props->chargerUsbOnline = false;
-    props->chargerWirelessOnline = false;
-    props->maxChargingCurrent = 0;
-    props->maxChargingVoltage = 0;
-    props->batteryStatus = BATTERY_STATUS_UNKNOWN;
-    props->batteryHealth = BATTERY_HEALTH_UNKNOWN;
-    props->batteryPresent = false;
-    props->batteryLevel = 0;
-    props->batteryVoltage = 0;
-    props->batteryTemperature = 0;
-    props->batteryCurrent = 0;
-    props->batteryCycleCount = 0;
-    props->batteryFullCharge = 0;
-    props->batteryChargeCounter = 0;
-    props->batteryTechnology.clear();
+static void initHealthInfo(HealthInfo_2_1* health_info_2_1) {
+    *health_info_2_1 = HealthInfo_2_1{};
+
+    // HIDL enum values are zero initialized, so they need to be initialized
+    // properly.
+    health_info_2_1->batteryCapacityLevel = BatteryCapacityLevel::UNKNOWN;
+    auto* props = &health_info_2_1->legacy.legacy;
+    props->batteryStatus = BatteryStatus::UNKNOWN;
+    props->batteryHealth = BatteryHealth::UNKNOWN;
 }
 
 BatteryMonitor::BatteryMonitor()
     : mHealthdConfig(nullptr),
       mBatteryDevicePresent(false),
       mBatteryFixedCapacity(0),
-      mBatteryFixedTemperature(0) {
-    initBatteryProperties(&props);
+      mBatteryFixedTemperature(0),
+      mHealthInfo(std::make_unique<HealthInfo_2_1>()) {
+    initHealthInfo(mHealthInfo.get());
 }
 
-struct BatteryProperties getBatteryProperties(BatteryMonitor* batteryMonitor) {
-    return batteryMonitor->props;
+BatteryMonitor::~BatteryMonitor() {}
+
+const HealthInfo_1_0& BatteryMonitor::getHealthInfo_1_0() const {
+    return getHealthInfo_2_0().legacy;
 }
 
-int BatteryMonitor::getBatteryStatus(const char* status) {
-    int ret;
-    struct sysfsStringEnumMap batteryStatusMap[] = {
-        { "Unknown", BATTERY_STATUS_UNKNOWN },
-        { "Charging", BATTERY_STATUS_CHARGING },
-        { "Discharging", BATTERY_STATUS_DISCHARGING },
-        { "Not charging", BATTERY_STATUS_NOT_CHARGING },
-        { "Full", BATTERY_STATUS_FULL },
-        { NULL, 0 },
+const HealthInfo_2_0& BatteryMonitor::getHealthInfo_2_0() const {
+    return getHealthInfo_2_1().legacy;
+}
+
+const HealthInfo_2_1& BatteryMonitor::getHealthInfo_2_1() const {
+    return *mHealthInfo;
+}
+
+BatteryStatus getBatteryStatus(const char* status) {
+    static SysfsStringEnumMap<BatteryStatus> batteryStatusMap[] = {
+            {"Unknown", BatteryStatus::UNKNOWN},
+            {"Charging", BatteryStatus::CHARGING},
+            {"Discharging", BatteryStatus::DISCHARGING},
+            {"Not charging", BatteryStatus::NOT_CHARGING},
+            {"Full", BatteryStatus::FULL},
+            {NULL, BatteryStatus::UNKNOWN},
     };
 
-    ret = mapSysfsString(status, batteryStatusMap);
-    if (ret < 0) {
+    auto ret = mapSysfsString(status, batteryStatusMap);
+    if (!ret) {
         KLOG_WARNING(LOG_TAG, "Unknown battery status '%s'\n", status);
-        ret = BATTERY_STATUS_UNKNOWN;
+        *ret = BatteryStatus::UNKNOWN;
     }
 
-    return ret;
+    return *ret;
 }
 
-int BatteryMonitor::getBatteryHealth(const char* status) {
-    int ret;
-    struct sysfsStringEnumMap batteryHealthMap[] = {
-        { "Unknown", BATTERY_HEALTH_UNKNOWN },
-        { "Good", BATTERY_HEALTH_GOOD },
-        { "Overheat", BATTERY_HEALTH_OVERHEAT },
-        { "Dead", BATTERY_HEALTH_DEAD },
-        { "Over voltage", BATTERY_HEALTH_OVER_VOLTAGE },
-        { "Unspecified failure", BATTERY_HEALTH_UNSPECIFIED_FAILURE },
-        { "Cold", BATTERY_HEALTH_COLD },
-        // battery health values from JEITA spec
-        { "Warm", BATTERY_HEALTH_GOOD },
-        { "Cool", BATTERY_HEALTH_GOOD },
-        { "Hot", BATTERY_HEALTH_OVERHEAT },
-        { NULL, 0 },
+BatteryCapacityLevel getBatteryCapacityLevel(const char* capacityLevel) {
+    static SysfsStringEnumMap<BatteryCapacityLevel> batteryCapacityLevelMap[] = {
+            {"Unknown", BatteryCapacityLevel::UNKNOWN},
+            {"Critical", BatteryCapacityLevel::CRITICAL},
+            {"Low", BatteryCapacityLevel::LOW},
+            {"Normal", BatteryCapacityLevel::NORMAL},
+            {"High", BatteryCapacityLevel::HIGH},
+            {"Full", BatteryCapacityLevel::FULL},
+            {NULL, BatteryCapacityLevel::UNKNOWN},
     };
 
-    ret = mapSysfsString(status, batteryHealthMap);
-    if (ret < 0) {
-        KLOG_WARNING(LOG_TAG, "Unknown battery health '%s'\n", status);
-        ret = BATTERY_HEALTH_UNKNOWN;
+    auto ret = mapSysfsString(capacityLevel, batteryCapacityLevelMap);
+    if (!ret) {
+        KLOG_WARNING(LOG_TAG, "Unknown battery capacity level '%s'\n", capacityLevel);
+        *ret = BatteryCapacityLevel::UNKNOWN;
     }
 
-    return ret;
+    return *ret;
+}
+
+BatteryHealth getBatteryHealth(const char* status) {
+    static SysfsStringEnumMap<BatteryHealth> batteryHealthMap[] = {
+            {"Unknown", BatteryHealth::UNKNOWN},
+            {"Good", BatteryHealth::GOOD},
+            {"Overheat", BatteryHealth::OVERHEAT},
+            {"Dead", BatteryHealth::DEAD},
+            {"Over voltage", BatteryHealth::OVER_VOLTAGE},
+            {"Unspecified failure", BatteryHealth::UNSPECIFIED_FAILURE},
+            {"Cold", BatteryHealth::COLD},
+            // battery health values from JEITA spec
+            {"Warm", BatteryHealth::GOOD},
+            {"Cool", BatteryHealth::GOOD},
+            {"Hot", BatteryHealth::OVERHEAT},
+            {NULL, BatteryHealth::UNKNOWN},
+    };
+
+    auto ret = mapSysfsString(status, batteryHealthMap);
+    if (!ret) {
+        KLOG_WARNING(LOG_TAG, "Unknown battery health '%s'\n", status);
+        *ret = BatteryHealth::UNKNOWN;
+    }
+
+    return *ret;
 }
 
 int BatteryMonitor::readFromFile(const String8& path, std::string* buf) {
@@ -148,35 +179,34 @@
 }
 
 BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String8& path) {
-    std::string buf;
-    int ret;
-    struct sysfsStringEnumMap supplyTypeMap[] = {
-            { "Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN },
-            { "Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY },
-            { "UPS", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "Mains", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB", ANDROID_POWER_SUPPLY_TYPE_USB },
-            { "USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_C", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_PD", ANDROID_POWER_SUPPLY_TYPE_AC },
-            { "USB_PD_DRP", ANDROID_POWER_SUPPLY_TYPE_USB },
-            { "Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS },
-            { NULL, 0 },
+    static SysfsStringEnumMap<int> supplyTypeMap[] = {
+            {"Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN},
+            {"Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY},
+            {"UPS", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"Mains", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB", ANDROID_POWER_SUPPLY_TYPE_USB},
+            {"USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_HVDCP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_C", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_PD", ANDROID_POWER_SUPPLY_TYPE_AC},
+            {"USB_PD_DRP", ANDROID_POWER_SUPPLY_TYPE_USB},
+            {"Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS},
+            {NULL, 0},
     };
+    std::string buf;
 
     if (readFromFile(path, &buf) <= 0)
         return ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
 
-    ret = mapSysfsString(buf.c_str(), supplyTypeMap);
-    if (ret < 0) {
+    auto ret = mapSysfsString(buf.c_str(), supplyTypeMap);
+    if (!ret) {
         KLOG_WARNING(LOG_TAG, "Unknown power supply type '%s'\n", buf.c_str());
-        ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
+        *ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
     }
 
-    return static_cast<BatteryMonitor::PowerSupplyType>(ret);
+    return static_cast<BatteryMonitor::PowerSupplyType>(*ret);
 }
 
 bool BatteryMonitor::getBooleanField(const String8& path) {
@@ -200,10 +230,10 @@
     return value;
 }
 
-bool BatteryMonitor::update(void) {
-    bool logthis;
+void BatteryMonitor::updateValues(void) {
+    initHealthInfo(mHealthInfo.get());
 
-    initBatteryProperties(&props);
+    HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
 
     if (!mHealthdConfig->batteryPresentPath.isEmpty())
         props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
@@ -227,12 +257,25 @@
     if (!mHealthdConfig->batteryChargeCounterPath.isEmpty())
         props.batteryChargeCounter = getIntField(mHealthdConfig->batteryChargeCounterPath);
 
+    if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty())
+        mHealthInfo->legacy.batteryCurrentAverage =
+                getIntField(mHealthdConfig->batteryCurrentAvgPath);
+
+    if (!mHealthdConfig->batteryChargeTimeToFullNowPath.isEmpty())
+        mHealthInfo->batteryChargeTimeToFullNowSeconds =
+                getIntField(mHealthdConfig->batteryChargeTimeToFullNowPath);
+
+    mHealthInfo->batteryFullCapacityUah = props.batteryFullCharge;
+
     props.batteryTemperature = mBatteryFixedTemperature ?
         mBatteryFixedTemperature :
         getIntField(mHealthdConfig->batteryTemperaturePath);
 
     std::string buf;
 
+    if (readFromFile(mHealthdConfig->batteryCapacityLevelPath, &buf) > 0)
+        mHealthInfo->batteryCapacityLevel = getBatteryCapacityLevel(buf.c_str());
+
     if (readFromFile(mHealthdConfig->batteryStatusPath, &buf) > 0)
         props.batteryStatus = getBatteryStatus(buf.c_str());
 
@@ -289,62 +332,58 @@
             }
         }
     }
+}
 
-    logthis = !healthd_board_battery_update(&props);
+void BatteryMonitor::logValues(void) {
+    char dmesgline[256];
+    size_t len;
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
+    if (props.batteryPresent) {
+        snprintf(dmesgline, sizeof(dmesgline), "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
+                 props.batteryLevel, props.batteryVoltage, props.batteryTemperature < 0 ? "-" : "",
+                 abs(props.batteryTemperature / 10), abs(props.batteryTemperature % 10),
+                 props.batteryHealth, props.batteryStatus);
 
-    if (logthis) {
-        char dmesgline[256];
-        size_t len;
-        if (props.batteryPresent) {
-            snprintf(dmesgline, sizeof(dmesgline),
-                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
-                 props.batteryLevel, props.batteryVoltage,
-                 props.batteryTemperature < 0 ? "-" : "",
-                 abs(props.batteryTemperature / 10),
-                 abs(props.batteryTemperature % 10), props.batteryHealth,
-                 props.batteryStatus);
-
-            len = strlen(dmesgline);
-            if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " c=%d", props.batteryCurrent);
-            }
-
-            if (!mHealthdConfig->batteryFullChargePath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " fc=%d", props.batteryFullCharge);
-            }
-
-            if (!mHealthdConfig->batteryCycleCountPath.isEmpty()) {
-                len += snprintf(dmesgline + len, sizeof(dmesgline) - len,
-                                " cc=%d", props.batteryCycleCount);
-            }
-        } else {
-            len = snprintf(dmesgline, sizeof(dmesgline),
-                 "battery none");
+        len = strlen(dmesgline);
+        if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " c=%d",
+                            props.batteryCurrent);
         }
 
-        snprintf(dmesgline + len, sizeof(dmesgline) - len, " chg=%s%s%s",
-                 props.chargerAcOnline ? "a" : "",
-                 props.chargerUsbOnline ? "u" : "",
-                 props.chargerWirelessOnline ? "w" : "");
+        if (!mHealthdConfig->batteryFullChargePath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " fc=%d",
+                            props.batteryFullCharge);
+        }
 
-        KLOG_WARNING(LOG_TAG, "%s\n", dmesgline);
+        if (!mHealthdConfig->batteryCycleCountPath.isEmpty()) {
+            len += snprintf(dmesgline + len, sizeof(dmesgline) - len, " cc=%d",
+                            props.batteryCycleCount);
+        }
+    } else {
+        len = snprintf(dmesgline, sizeof(dmesgline), "battery none");
     }
 
-    healthd_mode_ops->battery_update(&props);
+    snprintf(dmesgline + len, sizeof(dmesgline) - len, " chg=%s%s%s",
+             props.chargerAcOnline ? "a" : "", props.chargerUsbOnline ? "u" : "",
+             props.chargerWirelessOnline ? "w" : "");
+
+    KLOG_WARNING(LOG_TAG, "%s\n", dmesgline);
+}
+
+bool BatteryMonitor::isChargerOnline() {
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
     return props.chargerAcOnline | props.chargerUsbOnline |
             props.chargerWirelessOnline;
 }
 
 int BatteryMonitor::getChargeStatus() {
-    int result = BATTERY_STATUS_UNKNOWN;
+    BatteryStatus result = BatteryStatus::UNKNOWN;
     if (!mHealthdConfig->batteryStatusPath.isEmpty()) {
         std::string buf;
         if (readFromFile(mHealthdConfig->batteryStatusPath, &buf) > 0)
             result = getBatteryStatus(buf.c_str());
     }
-    return result;
+    return static_cast<int>(result);
 }
 
 status_t BatteryMonitor::getProperty(int id, struct BatteryProperty *val) {
@@ -417,6 +456,7 @@
 void BatteryMonitor::dumpState(int fd) {
     int v;
     char vs[128];
+    const HealthInfo_1_0& props = mHealthInfo->legacy.legacy;
 
     snprintf(vs, sizeof(vs), "ac: %d usb: %d wireless: %d current_max: %d voltage_max: %d\n",
              props.chargerAcOnline, props.chargerUsbOnline,
@@ -569,6 +609,19 @@
                         mHealthdConfig->batteryCycleCountPath = path;
                 }
 
+                if (mHealthdConfig->batteryCapacityLevelPath.isEmpty()) {
+                    path.clear();
+                    path.appendFormat("%s/%s/capacity_level", POWER_SUPPLY_SYSFS_PATH, name);
+                    if (access(path, R_OK) == 0) mHealthdConfig->batteryCapacityLevelPath = path;
+                }
+
+                if (mHealthdConfig->batteryChargeTimeToFullNowPath.isEmpty()) {
+                    path.clear();
+                    path.appendFormat("%s/%s/time_to_full_now", POWER_SUPPLY_SYSFS_PATH, name);
+                    if (access(path, R_OK) == 0)
+                        mHealthdConfig->batteryChargeTimeToFullNowPath = path;
+                }
+
                 if (mHealthdConfig->batteryCurrentAvgPath.isEmpty()) {
                     path.clear();
                     path.appendFormat("%s/%s/current_avg",
@@ -637,6 +690,10 @@
             KLOG_WARNING(LOG_TAG, "BatteryFullChargePath not found\n");
         if (mHealthdConfig->batteryCycleCountPath.isEmpty())
             KLOG_WARNING(LOG_TAG, "BatteryCycleCountPath not found\n");
+        if (mHealthdConfig->batteryCapacityLevelPath.isEmpty())
+            KLOG_WARNING(LOG_TAG, "batteryCapacityLevelPath not found\n");
+        if (mHealthdConfig->batteryChargeTimeToFullNowPath.isEmpty())
+            KLOG_WARNING(LOG_TAG, "batteryChargeTimeToFullNowPath. not found\n");
     }
 
     if (property_get("ro.boot.fake_battery", pval, NULL) > 0
diff --git a/healthd/animation.h b/healthd/animation.h
index 9476c91..d02d7a7 100644
--- a/healthd/animation.h
+++ b/healthd/animation.h
@@ -75,7 +75,7 @@
 
     bool run;
 
-    frame* frames;
+    frame* frames = nullptr;
     int cur_frame;
     int num_frames;
     int first_frame_repeats;  // Number of times to repeat the first frame in the current cycle
@@ -85,6 +85,8 @@
 
     int cur_level;  // current battery level being animated (0-100)
     int cur_status;  // current battery status - see BatteryService.h for BATTERY_STATUS_*
+
+    ~animation() { delete frames; }
 };
 
 }
diff --git a/healthd/charger.cpp b/healthd/charger.cpp
index 58ed416..d03978d 100644
--- a/healthd/charger.cpp
+++ b/healthd/charger.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <android-base/logging.h>
+
 #include "charger.sysprop.h"
 #include "healthd_mode_charger.h"
 #include "healthd_mode_charger_nops.h"
@@ -23,6 +25,7 @@
 #endif
 
 int main(int argc, char** argv) {
+    android::base::InitLogging(argv, &android::base::KernelLogger);
     if (CHARGER_FORCE_NO_UI || android::sysprop::ChargerProperties::no_ui().value_or(false)) {
         return healthd_charger_nops(argc, argv);
     } else {
diff --git a/healthd/charger_test.cpp b/healthd/charger_test.cpp
index a7e2161..e0bde68 100644
--- a/healthd/charger_test.cpp
+++ b/healthd/charger_test.cpp
@@ -21,13 +21,22 @@
 #include <condition_variable>
 #include <fstream>
 #include <iostream>
+#include <memory>
 #include <mutex>
 #include <streambuf>
 #include <string>
 #include <thread>
 #include <vector>
 
-#include <health2/Health.h>
+#include <health/utils.h>
+#include <health2impl/Health.h>
+
+#include "healthd_mode_charger.h"
+
+using android::hardware::health::InitHealthdConfig;
+using android::hardware::health::V2_1::HealthInfo;
+using android::hardware::health::V2_1::IHealth;
+using android::hardware::health::V2_1::implementation::Health;
 
 #define LOG_THIS(fmt, ...)     \
     ALOGE(fmt, ##__VA_ARGS__); \
@@ -129,22 +138,23 @@
     config->screen_on = NULL;
 }
 
-int healthd_board_battery_update(struct android::BatteryProperties*) {
-    getUpdateNotifier().set(true /* updated */);
+class TestHealth : public Health {
+  protected:
+    using Health::Health;
+    void UpdateHealthInfo(HealthInfo*) override { getUpdateNotifier().set(true /* updated */); }
+};
 
-    // return 0 to log periodic polled battery status to kernel log
-    return 0;
-}
-
-extern int healthd_charger_main(int argc, char** argv);
-
-int main(int argc, char** argv) {
-    using android::hardware::health::V2_0::implementation::Health;
-
+int main(int /*argc*/, char** /*argv*/) {
     const char* dumpFile = "/data/local/tmp/dump.txt";
 
+    auto config = std::make_unique<healthd_config>();
+    InitHealthdConfig(config.get());
+    healthd_board_init(config.get());
+    sp<IHealth> passthrough = new TestHealth(std::move(config));
+
     std::thread bgThread([=] {
-        healthd_charger_main(argc, argv);
+        android::Charger charger(passthrough);
+        charger.StartLoop();
     });
 
     // wait for healthd_init to finish
@@ -153,7 +163,7 @@
         exit(1);
     }
 
-    Health::getImplementation()->debug(createHidlHandle(dumpFile), {} /* options */);
+    passthrough->debug(createHidlHandle(dumpFile), {} /* options */);
 
     std::string content = openToString(dumpFile);
     int status = expectContains(content, {
diff --git a/healthd/charger_utils.cpp b/healthd/charger_utils.cpp
new file mode 100644
index 0000000..8bbfb4e
--- /dev/null
+++ b/healthd/charger_utils.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "charger_utils.h"
+
+#include <android-base/logging.h>
+#include <android/hardware/health/2.1/IHealth.h>
+#include <health/utils.h>
+#include <health2impl/Health.h>
+
+namespace android {
+namespace hardware {
+namespace health {
+
+sp<V2_1::IHealth> GetHealthServiceOrDefault() {
+    // No need to use get_health_service from libhealthhalutils that
+    // checks for "backup" instance provided by healthd, since
+    // V2_1::implementation::Health does the same thing.
+    sp<V2_1::IHealth> service = V2_1::IHealth::getService();
+    if (service != nullptr) {
+        LOG(INFO) << "Charger uses health HAL service.";
+    } else {
+        LOG(WARNING) << "Charger uses system defaults.";
+        auto config = std::make_unique<healthd_config>();
+        InitHealthdConfig(config.get());
+        service = new V2_1::implementation::Health(std::move(config));
+    }
+    return service;
+}
+
+}  // namespace health
+}  // namespace hardware
+}  // namespace android
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/healthd/charger_utils.h
similarity index 66%
copy from libmeminfo/vts/vts_meminfo_test.cpp
copy to healthd/charger_utils.h
index 3193c31..39d8aab 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/healthd/charger_utils.h
@@ -14,18 +14,16 @@
  * limitations under the License.
  */
 
-#include <gtest/gtest.h>
+#pragma once
 
-#include <meminfo/procmeminfo.h>
+#include <android/hardware/health/2.1/IHealth.h>
 
 namespace android {
-namespace meminfo {
-
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
-}
-
-}  // namespace meminfo
+namespace hardware {
+namespace health {
+// Return health HAL service. If it is not supported on the device (with
+// VINTF checks), return a default passthrough implementation.
+sp<V2_1::IHealth> GetHealthServiceOrDefault();
+}  // namespace health
+}  // namespace hardware
 }  // namespace android
diff --git a/healthd/healthd_mode_charger.cpp b/healthd/healthd_mode_charger.cpp
index d676083..386ba1a 100644
--- a/healthd/healthd_mode_charger.cpp
+++ b/healthd/healthd_mode_charger.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "healthd_mode_charger.h"
+
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -28,7 +30,7 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <functional>
+#include <optional>
 
 #include <android-base/file.h>
 #include <android-base/macros.h>
@@ -47,16 +49,30 @@
 
 #include "AnimationParser.h"
 #include "charger.sysprop.h"
+#include "charger_utils.h"
 #include "healthd_draw.h"
 
-#include <health2/Health.h>
+#include <android/hardware/health/2.0/IHealthInfoCallback.h>
+#include <health/utils.h>
+#include <health2impl/HalHealthLoop.h>
+#include <health2impl/Health.h>
 #include <healthd/healthd.h>
 
 using namespace android;
+using android::hardware::Return;
+using android::hardware::health::GetHealthServiceOrDefault;
+using android::hardware::health::HealthLoop;
+using android::hardware::health::V1_0::BatteryStatus;
+using android::hardware::health::V2_0::Result;
+using android::hardware::health::V2_1::IHealth;
+using IHealth_2_0 = android::hardware::health::V2_0::IHealth;
+using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
 
 // main healthd loop
 extern int healthd_main(void);
 
+// minui globals
 char* locale;
 
 #ifndef max
@@ -85,6 +101,8 @@
 #define LOGW(x...) KLOG_WARNING("charger", x);
 #define LOGV(x...) KLOG_DEBUG("charger", x);
 
+namespace android {
+
 // Resources in /product/etc/res overrides resources in /res.
 // If the device is using the Generic System Image (GSI), resources may exist in
 // both paths.
@@ -93,28 +111,6 @@
 static constexpr const char* product_animation_root = "/product/etc/res/images/";
 static constexpr const char* animation_desc_path = "/res/values/charger/animation.txt";
 
-struct key_state {
-    bool pending;
-    bool down;
-    int64_t timestamp;
-};
-
-struct charger {
-    bool have_battery_state;
-    bool charger_connected;
-    bool screen_blanked;
-    int64_t next_screen_transition;
-    int64_t next_key_check;
-    int64_t next_pwr_check;
-    int64_t wait_batt_level_timestamp;
-
-    key_state keys[KEY_MAX + 1];
-
-    animation* batt_anim;
-    GRSurface* surf_unknown;
-    int boot_min_cap;
-};
-
 static const animation BASE_ANIMATION = {
     .text_clock =
         {
@@ -153,51 +149,51 @@
     .cur_status = BATTERY_STATUS_UNKNOWN,
 };
 
-static animation::frame default_animation_frames[] = {
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 19,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 39,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 59,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 79,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 80,
-        .max_level = 95,
-        .surface = NULL,
-    },
-    {
-        .disp_time = 750,
-        .min_level = 0,
-        .max_level = 100,
-        .surface = NULL,
-    },
-};
+void Charger::InitDefaultAnimationFrames() {
+    owned_frames_ = {
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 19,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 39,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 59,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 79,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 80,
+                    .max_level = 95,
+                    .surface = NULL,
+            },
+            {
+                    .disp_time = 750,
+                    .min_level = 0,
+                    .max_level = 100,
+                    .surface = NULL,
+            },
+    };
+}
 
-static animation battery_animation = BASE_ANIMATION;
+Charger::Charger(const sp<IHealth>& service)
+    : HalHealthLoop("charger", service), batt_anim_(BASE_ANIMATION) {}
 
-static charger charger_state;
-static healthd_config* healthd_config;
-static android::BatteryProperties* batt_prop;
-static std::unique_ptr<HealthdDraw> healthd_draw;
+Charger::~Charger() {}
 
 /* current time in milliseconds */
 static int64_t curr_time_ms() {
@@ -284,123 +280,125 @@
     anim->run = false;
 }
 
-static void update_screen_state(charger* charger, int64_t now) {
-    animation* batt_anim = charger->batt_anim;
+void Charger::UpdateScreenState(int64_t now) {
     int disp_time;
 
-    if (!batt_anim->run || now < charger->next_screen_transition) return;
+    if (!batt_anim_.run || now < next_screen_transition_) return;
 
     // If battery level is not ready, keep checking in the defined time
-    if (batt_prop == nullptr ||
-        (batt_prop->batteryLevel == 0 && batt_prop->batteryStatus == BATTERY_STATUS_UNKNOWN)) {
-        if (charger->wait_batt_level_timestamp == 0) {
+    if (health_info_.batteryLevel == 0 && health_info_.batteryStatus == BatteryStatus::UNKNOWN) {
+        if (wait_batt_level_timestamp_ == 0) {
             // Set max delay time and skip drawing screen
-            charger->wait_batt_level_timestamp = now + MAX_BATT_LEVEL_WAIT_TIME;
+            wait_batt_level_timestamp_ = now + MAX_BATT_LEVEL_WAIT_TIME;
             LOGV("[%" PRId64 "] wait for battery capacity ready\n", now);
             return;
-        } else if (now <= charger->wait_batt_level_timestamp) {
+        } else if (now <= wait_batt_level_timestamp_) {
             // Do nothing, keep waiting
             return;
         }
         // If timeout and battery level is still not ready, draw unknown battery
     }
 
-    if (healthd_draw == nullptr) {
-        if (healthd_config && healthd_config->screen_on) {
-            if (!healthd_config->screen_on(batt_prop)) {
+    if (healthd_draw_ == nullptr) {
+        std::optional<bool> out_screen_on;
+        service()->shouldKeepScreenOn([&](Result res, bool screen_on) {
+            if (res == Result::SUCCESS) {
+                *out_screen_on = screen_on;
+            }
+        });
+        if (out_screen_on.has_value()) {
+            if (!*out_screen_on) {
                 LOGV("[%" PRId64 "] leave screen off\n", now);
-                batt_anim->run = false;
-                charger->next_screen_transition = -1;
-                if (charger->charger_connected) request_suspend(true);
+                batt_anim_.run = false;
+                next_screen_transition_ = -1;
+                if (charger_online()) request_suspend(true);
                 return;
             }
         }
 
-        healthd_draw.reset(new HealthdDraw(batt_anim));
+        healthd_draw_.reset(new HealthdDraw(&batt_anim_));
 
         if (android::sysprop::ChargerProperties::disable_init_blank().value_or(false)) {
-            healthd_draw->blank_screen(true);
-            charger->screen_blanked = true;
+            healthd_draw_->blank_screen(true);
+            screen_blanked_ = true;
         }
     }
 
     /* animation is over, blank screen and leave */
-    if (batt_anim->num_cycles > 0 && batt_anim->cur_cycle == batt_anim->num_cycles) {
-        reset_animation(batt_anim);
-        charger->next_screen_transition = -1;
-        healthd_draw->blank_screen(true);
-        charger->screen_blanked = true;
+    if (batt_anim_.num_cycles > 0 && batt_anim_.cur_cycle == batt_anim_.num_cycles) {
+        reset_animation(&batt_anim_);
+        next_screen_transition_ = -1;
+        healthd_draw_->blank_screen(true);
+        screen_blanked_ = true;
         LOGV("[%" PRId64 "] animation done\n", now);
-        if (charger->charger_connected) request_suspend(true);
+        if (charger_online()) request_suspend(true);
         return;
     }
 
-    disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time;
+    disp_time = batt_anim_.frames[batt_anim_.cur_frame].disp_time;
 
-    if (charger->screen_blanked) {
-        healthd_draw->blank_screen(false);
-        charger->screen_blanked = false;
+    if (screen_blanked_) {
+        healthd_draw_->blank_screen(false);
+        screen_blanked_ = false;
     }
 
     /* animation starting, set up the animation */
-    if (batt_anim->cur_frame == 0) {
+    if (batt_anim_.cur_frame == 0) {
         LOGV("[%" PRId64 "] animation starting\n", now);
-        if (batt_prop) {
-            batt_anim->cur_level = batt_prop->batteryLevel;
-            batt_anim->cur_status = batt_prop->batteryStatus;
-            if (batt_prop->batteryLevel >= 0 && batt_anim->num_frames != 0) {
-                /* find first frame given current battery level */
-                for (int i = 0; i < batt_anim->num_frames; i++) {
-                    if (batt_anim->cur_level >= batt_anim->frames[i].min_level &&
-                        batt_anim->cur_level <= batt_anim->frames[i].max_level) {
-                        batt_anim->cur_frame = i;
-                        break;
-                    }
+        batt_anim_.cur_level = health_info_.batteryLevel;
+        batt_anim_.cur_status = (int)health_info_.batteryStatus;
+        if (health_info_.batteryLevel >= 0 && batt_anim_.num_frames != 0) {
+            /* find first frame given current battery level */
+            for (int i = 0; i < batt_anim_.num_frames; i++) {
+                if (batt_anim_.cur_level >= batt_anim_.frames[i].min_level &&
+                    batt_anim_.cur_level <= batt_anim_.frames[i].max_level) {
+                    batt_anim_.cur_frame = i;
+                    break;
                 }
-
-                if (charger->charger_connected) {
-                    // repeat the first frame first_frame_repeats times
-                    disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time *
-                                batt_anim->first_frame_repeats;
-                } else {
-                    disp_time = UNPLUGGED_DISPLAY_TIME / batt_anim->num_cycles;
-                }
-
-                LOGV("cur_frame=%d disp_time=%d\n", batt_anim->cur_frame, disp_time);
             }
+
+            if (charger_online()) {
+                // repeat the first frame first_frame_repeats times
+                disp_time = batt_anim_.frames[batt_anim_.cur_frame].disp_time *
+                            batt_anim_.first_frame_repeats;
+            } else {
+                disp_time = UNPLUGGED_DISPLAY_TIME / batt_anim_.num_cycles;
+            }
+
+            LOGV("cur_frame=%d disp_time=%d\n", batt_anim_.cur_frame, disp_time);
         }
     }
 
     /* draw the new frame (@ cur_frame) */
-    healthd_draw->redraw_screen(charger->batt_anim, charger->surf_unknown);
+    healthd_draw_->redraw_screen(&batt_anim_, surf_unknown_);
 
     /* if we don't have anim frames, we only have one image, so just bump
      * the cycle counter and exit
      */
-    if (batt_anim->num_frames == 0 || batt_anim->cur_level < 0) {
+    if (batt_anim_.num_frames == 0 || batt_anim_.cur_level < 0) {
         LOGW("[%" PRId64 "] animation missing or unknown battery status\n", now);
-        charger->next_screen_transition = now + BATTERY_UNKNOWN_TIME;
-        batt_anim->cur_cycle++;
+        next_screen_transition_ = now + BATTERY_UNKNOWN_TIME;
+        batt_anim_.cur_cycle++;
         return;
     }
 
     /* schedule next screen transition */
-    charger->next_screen_transition = curr_time_ms() + disp_time;
+    next_screen_transition_ = curr_time_ms() + disp_time;
 
     /* advance frame cntr to the next valid frame only if we are charging
      * if necessary, advance cycle cntr, and reset frame cntr
      */
-    if (charger->charger_connected) {
-        batt_anim->cur_frame++;
+    if (charger_online()) {
+        batt_anim_.cur_frame++;
 
-        while (batt_anim->cur_frame < batt_anim->num_frames &&
-               (batt_anim->cur_level < batt_anim->frames[batt_anim->cur_frame].min_level ||
-                batt_anim->cur_level > batt_anim->frames[batt_anim->cur_frame].max_level)) {
-            batt_anim->cur_frame++;
+        while (batt_anim_.cur_frame < batt_anim_.num_frames &&
+               (batt_anim_.cur_level < batt_anim_.frames[batt_anim_.cur_frame].min_level ||
+                batt_anim_.cur_level > batt_anim_.frames[batt_anim_.cur_frame].max_level)) {
+            batt_anim_.cur_frame++;
         }
-        if (batt_anim->cur_frame >= batt_anim->num_frames) {
-            batt_anim->cur_cycle++;
-            batt_anim->cur_frame = 0;
+        if (batt_anim_.cur_frame >= batt_anim_.num_frames) {
+            batt_anim_.cur_cycle++;
+            batt_anim_.cur_frame = 0;
 
             /* don't reset the cycle counter, since we use that as a signal
              * in a test above to check if animation is over
@@ -411,29 +409,29 @@
          * If we stop it immediately instead of going through this loop, then
          * the animation would stop somewhere in the middle.
          */
-        batt_anim->cur_frame = 0;
-        batt_anim->cur_cycle++;
+        batt_anim_.cur_frame = 0;
+        batt_anim_.cur_cycle++;
     }
 }
 
-static int set_key_callback(charger* charger, int code, int value) {
+int Charger::SetKeyCallback(int code, int value) {
     int64_t now = curr_time_ms();
     int down = !!value;
 
     if (code > KEY_MAX) return -1;
 
     /* ignore events that don't modify our state */
-    if (charger->keys[code].down == down) return 0;
+    if (keys_[code].down == down) return 0;
 
     /* only record the down even timestamp, as the amount
      * of time the key spent not being pressed is not useful */
-    if (down) charger->keys[code].timestamp = now;
-    charger->keys[code].down = down;
-    charger->keys[code].pending = true;
+    if (down) keys_[code].timestamp = now;
+    keys_[code].down = down;
+    keys_[code].pending = true;
     if (down) {
         LOGV("[%" PRId64 "] key[%d] down\n", now, code);
     } else {
-        int64_t duration = now - charger->keys[code].timestamp;
+        int64_t duration = now - keys_[code].timestamp;
         int64_t secs = duration / 1000;
         int64_t msecs = duration - secs * 1000;
         LOGV("[%" PRId64 "] key[%d] up (was down for %" PRId64 ".%" PRId64 "sec)\n", now, code,
@@ -443,20 +441,19 @@
     return 0;
 }
 
-static void update_input_state(charger* charger, input_event* ev) {
+void Charger::UpdateInputState(input_event* ev) {
     if (ev->type != EV_KEY) return;
-    set_key_callback(charger, ev->code, ev->value);
+    SetKeyCallback(ev->code, ev->value);
 }
 
-static void set_next_key_check(charger* charger, key_state* key, int64_t timeout) {
+void Charger::SetNextKeyCheck(key_state* key, int64_t timeout) {
     int64_t then = key->timestamp + timeout;
 
-    if (charger->next_key_check == -1 || then < charger->next_key_check)
-        charger->next_key_check = then;
+    if (next_key_check_ == -1 || then < next_key_check_) next_key_check_ = then;
 }
 
-static void process_key(charger* charger, int code, int64_t now) {
-    key_state* key = &charger->keys[code];
+void Charger::ProcessKey(int code, int64_t now) {
+    key_state* key = &keys_[code];
 
     if (code == KEY_POWER) {
         if (key->down) {
@@ -469,7 +466,7 @@
                     LOGW("[%" PRId64 "] booting from charger mode\n", now);
                     property_set("sys.boot_from_charger_mode", "1");
                 } else {
-                    if (charger->batt_anim->cur_level >= charger->boot_min_cap) {
+                    if (batt_anim_.cur_level >= boot_min_cap_) {
                         LOGW("[%" PRId64 "] rebooting\n", now);
                         reboot(RB_AUTOBOOT);
                     } else {
@@ -483,18 +480,18 @@
                 /* if the key is pressed but timeout hasn't expired,
                  * make sure we wake up at the right-ish time to check
                  */
-                set_next_key_check(charger, key, POWER_ON_KEY_TIME);
+                SetNextKeyCheck(key, POWER_ON_KEY_TIME);
 
                 /* Turn on the display and kick animation on power-key press
                  * rather than on key release
                  */
-                kick_animation(charger->batt_anim);
+                kick_animation(&batt_anim_);
                 request_suspend(false);
             }
         } else {
             /* if the power key got released, force screen state cycle */
             if (key->pending) {
-                kick_animation(charger->batt_anim);
+                kick_animation(&batt_anim_);
                 request_suspend(false);
             }
         }
@@ -503,36 +500,35 @@
     key->pending = false;
 }
 
-static void handle_input_state(charger* charger, int64_t now) {
-    process_key(charger, KEY_POWER, now);
+void Charger::HandleInputState(int64_t now) {
+    ProcessKey(KEY_POWER, now);
 
-    if (charger->next_key_check != -1 && now > charger->next_key_check)
-        charger->next_key_check = -1;
+    if (next_key_check_ != -1 && now > next_key_check_) next_key_check_ = -1;
 }
 
-static void handle_power_supply_state(charger* charger, int64_t now) {
+void Charger::HandlePowerSupplyState(int64_t now) {
     int timer_shutdown = UNPLUGGED_SHUTDOWN_TIME;
-    if (!charger->have_battery_state) return;
+    if (!have_battery_state_) return;
 
-    if (!charger->charger_connected) {
+    if (!charger_online()) {
         request_suspend(false);
-        if (charger->next_pwr_check == -1) {
+        if (next_pwr_check_ == -1) {
             /* Last cycle would have stopped at the extreme top of battery-icon
              * Need to show the correct level corresponding to capacity.
              *
-             * Reset next_screen_transition to update screen immediately.
+             * Reset next_screen_transition_ to update screen immediately.
              * Reset & kick animation to show complete animation cycles
              * when charger disconnected.
              */
             timer_shutdown =
                     property_get_int32(UNPLUGGED_SHUTDOWN_TIME_PROP, UNPLUGGED_SHUTDOWN_TIME);
-            charger->next_screen_transition = now - 1;
-            reset_animation(charger->batt_anim);
-            kick_animation(charger->batt_anim);
-            charger->next_pwr_check = now + timer_shutdown;
+            next_screen_transition_ = now - 1;
+            reset_animation(&batt_anim_);
+            kick_animation(&batt_anim_);
+            next_pwr_check_ = now + timer_shutdown;
             LOGW("[%" PRId64 "] device unplugged: shutting down in %" PRId64 " (@ %" PRId64 ")\n",
-                 now, (int64_t)timer_shutdown, charger->next_pwr_check);
-        } else if (now >= charger->next_pwr_check) {
+                 now, (int64_t)timer_shutdown, next_pwr_check_);
+        } else if (now >= next_pwr_check_) {
             LOGW("[%" PRId64 "] shutting down\n", now);
             reboot(RB_POWER_OFF);
         } else {
@@ -540,64 +536,60 @@
         }
     } else {
         /* online supply present, reset shutdown timer if set */
-        if (charger->next_pwr_check != -1) {
-            /* Reset next_screen_transition to update screen immediately.
+        if (next_pwr_check_ != -1) {
+            /* Reset next_screen_transition_ to update screen immediately.
              * Reset & kick animation to show complete animation cycles
              * when charger connected again.
              */
             request_suspend(false);
-            charger->next_screen_transition = now - 1;
-            reset_animation(charger->batt_anim);
-            kick_animation(charger->batt_anim);
+            next_screen_transition_ = now - 1;
+            reset_animation(&batt_anim_);
+            kick_animation(&batt_anim_);
             LOGW("[%" PRId64 "] device plugged in: shutdown cancelled\n", now);
         }
-        charger->next_pwr_check = -1;
+        next_pwr_check_ = -1;
     }
 }
 
-void healthd_mode_charger_heartbeat() {
-    charger* charger = &charger_state;
+void Charger::Heartbeat() {
+    // charger* charger = &charger_state;
     int64_t now = curr_time_ms();
 
-    handle_input_state(charger, now);
-    handle_power_supply_state(charger, now);
+    HandleInputState(now);
+    HandlePowerSupplyState(now);
 
     /* do screen update last in case any of the above want to start
      * screen transitions (animations, etc)
      */
-    update_screen_state(charger, now);
+    UpdateScreenState(now);
 }
 
-void healthd_mode_charger_battery_update(android::BatteryProperties* props) {
-    charger* charger = &charger_state;
+void Charger::OnHealthInfoChanged(const HealthInfo_2_1& health_info) {
+    set_charger_online(health_info);
 
-    charger->charger_connected =
-        props->chargerAcOnline || props->chargerUsbOnline || props->chargerWirelessOnline;
-
-    if (!charger->have_battery_state) {
-        charger->have_battery_state = true;
-        charger->next_screen_transition = curr_time_ms() - 1;
+    if (!have_battery_state_) {
+        have_battery_state_ = true;
+        next_screen_transition_ = curr_time_ms() - 1;
         request_suspend(false);
-        reset_animation(charger->batt_anim);
-        kick_animation(charger->batt_anim);
+        reset_animation(&batt_anim_);
+        kick_animation(&batt_anim_);
     }
-    batt_prop = props;
+    health_info_ = health_info.legacy.legacy;
+
+    AdjustWakealarmPeriods(charger_online());
 }
 
-int healthd_mode_charger_preparetowait(void) {
-    charger* charger = &charger_state;
+int Charger::PrepareToWait(void) {
     int64_t now = curr_time_ms();
     int64_t next_event = INT64_MAX;
     int64_t timeout;
 
     LOGV("[%" PRId64 "] next screen: %" PRId64 " next key: %" PRId64 " next pwr: %" PRId64 "\n",
-         now, charger->next_screen_transition, charger->next_key_check, charger->next_pwr_check);
+         now, next_screen_transition_, next_key_check_, next_pwr_check_);
 
-    if (charger->next_screen_transition != -1) next_event = charger->next_screen_transition;
-    if (charger->next_key_check != -1 && charger->next_key_check < next_event)
-        next_event = charger->next_key_check;
-    if (charger->next_pwr_check != -1 && charger->next_pwr_check < next_event)
-        next_event = charger->next_pwr_check;
+    if (next_screen_transition_ != -1) next_event = next_screen_transition_;
+    if (next_key_check_ != -1 && next_key_check_ < next_event) next_event = next_key_check_;
+    if (next_pwr_check_ != -1 && next_pwr_check_ < next_event) next_event = next_pwr_check_;
 
     if (next_event != -1 && next_event != INT64_MAX)
         timeout = max(0, next_event - now);
@@ -607,32 +599,32 @@
     return (int)timeout;
 }
 
-static int input_callback(charger* charger, int fd, unsigned int epevents) {
+int Charger::InputCallback(int fd, unsigned int epevents) {
     input_event ev;
     int ret;
 
     ret = ev_get_input(fd, epevents, &ev);
     if (ret) return -1;
-    update_input_state(charger, &ev);
+    UpdateInputState(&ev);
     return 0;
 }
 
-static void charger_event_handler(uint32_t /*epevents*/) {
+static void charger_event_handler(HealthLoop* /*charger_loop*/, uint32_t /*epevents*/) {
     int ret;
 
     ret = ev_wait(-1);
     if (!ret) ev_dispatch();
 }
 
-animation* init_animation() {
+void Charger::InitAnimation() {
     bool parse_success;
 
     std::string content;
     if (base::ReadFileToString(product_animation_desc_path, &content)) {
-        parse_success = parse_animation_desc(content, &battery_animation);
-        battery_animation.set_resource_root(product_animation_root);
+        parse_success = parse_animation_desc(content, &batt_anim_);
+        batt_anim_.set_resource_root(product_animation_root);
     } else if (base::ReadFileToString(animation_desc_path, &content)) {
-        parse_success = parse_animation_desc(content, &battery_animation);
+        parse_success = parse_animation_desc(content, &batt_anim_);
     } else {
         LOGW("Could not open animation description at %s\n", animation_desc_path);
         parse_success = false;
@@ -640,41 +632,36 @@
 
     if (!parse_success) {
         LOGW("Could not parse animation description. Using default animation.\n");
-        battery_animation = BASE_ANIMATION;
-        battery_animation.animation_file.assign("charger/battery_scale");
-        battery_animation.frames = default_animation_frames;
-        battery_animation.num_frames = ARRAY_SIZE(default_animation_frames);
+        batt_anim_ = BASE_ANIMATION;
+        batt_anim_.animation_file.assign("charger/battery_scale");
+        InitDefaultAnimationFrames();
+        batt_anim_.frames = owned_frames_.data();
+        batt_anim_.num_frames = owned_frames_.size();
     }
-    if (battery_animation.fail_file.empty()) {
-        battery_animation.fail_file.assign("charger/battery_fail");
+    if (batt_anim_.fail_file.empty()) {
+        batt_anim_.fail_file.assign("charger/battery_fail");
     }
 
     LOGV("Animation Description:\n");
-    LOGV("  animation: %d %d '%s' (%d)\n", battery_animation.num_cycles,
-         battery_animation.first_frame_repeats, battery_animation.animation_file.c_str(),
-         battery_animation.num_frames);
-    LOGV("  fail_file: '%s'\n", battery_animation.fail_file.c_str());
-    LOGV("  clock: %d %d %d %d %d %d '%s'\n", battery_animation.text_clock.pos_x,
-         battery_animation.text_clock.pos_y, battery_animation.text_clock.color_r,
-         battery_animation.text_clock.color_g, battery_animation.text_clock.color_b,
-         battery_animation.text_clock.color_a, battery_animation.text_clock.font_file.c_str());
-    LOGV("  percent: %d %d %d %d %d %d '%s'\n", battery_animation.text_percent.pos_x,
-         battery_animation.text_percent.pos_y, battery_animation.text_percent.color_r,
-         battery_animation.text_percent.color_g, battery_animation.text_percent.color_b,
-         battery_animation.text_percent.color_a, battery_animation.text_percent.font_file.c_str());
-    for (int i = 0; i < battery_animation.num_frames; i++) {
-        LOGV("  frame %.2d: %d %d %d\n", i, battery_animation.frames[i].disp_time,
-             battery_animation.frames[i].min_level, battery_animation.frames[i].max_level);
+    LOGV("  animation: %d %d '%s' (%d)\n", batt_anim_.num_cycles, batt_anim_.first_frame_repeats,
+         batt_anim_.animation_file.c_str(), batt_anim_.num_frames);
+    LOGV("  fail_file: '%s'\n", batt_anim_.fail_file.c_str());
+    LOGV("  clock: %d %d %d %d %d %d '%s'\n", batt_anim_.text_clock.pos_x,
+         batt_anim_.text_clock.pos_y, batt_anim_.text_clock.color_r, batt_anim_.text_clock.color_g,
+         batt_anim_.text_clock.color_b, batt_anim_.text_clock.color_a,
+         batt_anim_.text_clock.font_file.c_str());
+    LOGV("  percent: %d %d %d %d %d %d '%s'\n", batt_anim_.text_percent.pos_x,
+         batt_anim_.text_percent.pos_y, batt_anim_.text_percent.color_r,
+         batt_anim_.text_percent.color_g, batt_anim_.text_percent.color_b,
+         batt_anim_.text_percent.color_a, batt_anim_.text_percent.font_file.c_str());
+    for (int i = 0; i < batt_anim_.num_frames; i++) {
+        LOGV("  frame %.2d: %d %d %d\n", i, batt_anim_.frames[i].disp_time,
+             batt_anim_.frames[i].min_level, batt_anim_.frames[i].max_level);
     }
-
-    return &battery_animation;
 }
 
-void healthd_mode_charger_init(struct healthd_config* config) {
-    using android::hardware::health::V2_0::implementation::Health;
-
+void Charger::Init(struct healthd_config* config) {
     int ret;
-    charger* charger = &charger_state;
     int i;
     int epollfd;
 
@@ -682,22 +669,22 @@
 
     LOGW("--------------- STARTING CHARGER MODE ---------------\n");
 
-    ret = ev_init(std::bind(&input_callback, charger, std::placeholders::_1, std::placeholders::_2));
+    ret = ev_init(
+            std::bind(&Charger::InputCallback, this, std::placeholders::_1, std::placeholders::_2));
     if (!ret) {
         epollfd = ev_get_epollfd();
-        healthd_register_event(epollfd, charger_event_handler, EVENT_WAKEUP_FD);
+        RegisterEvent(epollfd, &charger_event_handler, EVENT_WAKEUP_FD);
     }
 
-    animation* anim = init_animation();
-    charger->batt_anim = anim;
+    InitAnimation();
 
-    ret = res_create_display_surface(anim->fail_file.c_str(), &charger->surf_unknown);
+    ret = res_create_display_surface(batt_anim_.fail_file.c_str(), &surf_unknown_);
     if (ret < 0) {
         LOGE("Cannot load custom battery_fail image. Reverting to built in: %d\n", ret);
-        ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown);
+        ret = res_create_display_surface("charger/battery_fail", &surf_unknown_);
         if (ret < 0) {
             LOGE("Cannot load built in battery_fail image\n");
-            charger->surf_unknown = NULL;
+            surf_unknown_ = NULL;
         }
     }
 
@@ -705,49 +692,41 @@
     int scale_count;
     int scale_fps;  // Not in use (charger/battery_scale doesn't have FPS text
                     // chunk). We are using hard-coded frame.disp_time instead.
-    ret = res_create_multi_display_surface(anim->animation_file.c_str(), &scale_count, &scale_fps,
-                                           &scale_frames);
+    ret = res_create_multi_display_surface(batt_anim_.animation_file.c_str(), &scale_count,
+                                           &scale_fps, &scale_frames);
     if (ret < 0) {
         LOGE("Cannot load battery_scale image\n");
-        anim->num_frames = 0;
-        anim->num_cycles = 1;
-    } else if (scale_count != anim->num_frames) {
+        batt_anim_.num_frames = 0;
+        batt_anim_.num_cycles = 1;
+    } else if (scale_count != batt_anim_.num_frames) {
         LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n", scale_count,
-             anim->num_frames);
-        anim->num_frames = 0;
-        anim->num_cycles = 1;
+             batt_anim_.num_frames);
+        batt_anim_.num_frames = 0;
+        batt_anim_.num_cycles = 1;
     } else {
-        for (i = 0; i < anim->num_frames; i++) {
-            anim->frames[i].surface = scale_frames[i];
+        for (i = 0; i < batt_anim_.num_frames; i++) {
+            batt_anim_.frames[i].surface = scale_frames[i];
         }
     }
-    ev_sync_key_state(
-        std::bind(&set_key_callback, charger, std::placeholders::_1, std::placeholders::_2));
+    ev_sync_key_state(std::bind(&Charger::SetKeyCallback, this, std::placeholders::_1,
+                                std::placeholders::_2));
 
-    charger->next_screen_transition = -1;
-    charger->next_key_check = -1;
-    charger->next_pwr_check = -1;
-    charger->wait_batt_level_timestamp = 0;
+    next_screen_transition_ = -1;
+    next_key_check_ = -1;
+    next_pwr_check_ = -1;
+    wait_batt_level_timestamp_ = 0;
 
-    // Initialize Health implementation (which initializes the internal BatteryMonitor).
-    Health::initInstance(config);
+    // Retrieve healthd_config from the existing health HAL.
+    HalHealthLoop::Init(config);
 
-    healthd_config = config;
-    charger->boot_min_cap = config->boot_min_cap;
+    boot_min_cap_ = config->boot_min_cap;
 }
 
-static struct healthd_mode_ops charger_ops = {
-        .init = healthd_mode_charger_init,
-        .preparetowait = healthd_mode_charger_preparetowait,
-        .heartbeat = healthd_mode_charger_heartbeat,
-        .battery_update = healthd_mode_charger_battery_update,
-};
+}  // namespace android
 
 int healthd_charger_main(int argc, char** argv) {
     int ch;
 
-    healthd_mode_ops = &charger_ops;
-
     while ((ch = getopt(argc, argv, "cr")) != -1) {
         switch (ch) {
             case 'c':
@@ -763,5 +742,6 @@
         }
     }
 
-    return healthd_main();
+    Charger charger(GetHealthServiceOrDefault());
+    return charger.StartLoop();
 }
diff --git a/healthd/healthd_mode_charger.h b/healthd/healthd_mode_charger.h
index 2f0c9f2..370ca86 100644
--- a/healthd/healthd_mode_charger.h
+++ b/healthd/healthd_mode_charger.h
@@ -16,4 +16,72 @@
 
 #pragma once
 
+#include <linux/input.h>
+
+#include <memory>
+#include <vector>
+
+#include <android/hardware/health/2.0/IHealthInfoCallback.h>
+#include <android/hardware/health/2.1/IHealth.h>
+#include <health2impl/HalHealthLoop.h>
+
+#include "animation.h"
+
+class GRSurface;
+class HealthdDraw;
+
+namespace android {
+struct key_state {
+    bool pending;
+    bool down;
+    int64_t timestamp;
+};
+
+class Charger : public ::android::hardware::health::V2_1::implementation::HalHealthLoop {
+  public:
+    using HealthInfo_1_0 = android::hardware::health::V1_0::HealthInfo;
+    using HealthInfo_2_1 = android::hardware::health::V2_1::HealthInfo;
+
+    Charger(const sp<android::hardware::health::V2_1::IHealth>& service);
+    ~Charger();
+
+  protected:
+    // HealthLoop overrides.
+    void Heartbeat() override;
+    int PrepareToWait() override;
+    void Init(struct healthd_config* config) override;
+    // HalHealthLoop overrides
+    void OnHealthInfoChanged(const HealthInfo_2_1& health_info) override;
+
+  private:
+    void InitDefaultAnimationFrames();
+    void UpdateScreenState(int64_t now);
+    int SetKeyCallback(int code, int value);
+    void UpdateInputState(input_event* ev);
+    void SetNextKeyCheck(key_state* key, int64_t timeout);
+    void ProcessKey(int code, int64_t now);
+    void HandleInputState(int64_t now);
+    void HandlePowerSupplyState(int64_t now);
+    int InputCallback(int fd, unsigned int epevents);
+    void InitAnimation();
+
+    bool have_battery_state_ = false;
+    bool screen_blanked_ = false;
+    int64_t next_screen_transition_ = 0;
+    int64_t next_key_check_ = 0;
+    int64_t next_pwr_check_ = 0;
+    int64_t wait_batt_level_timestamp_ = 0;
+
+    key_state keys_[KEY_MAX + 1];
+
+    animation batt_anim_;
+    GRSurface* surf_unknown_ = nullptr;
+    int boot_min_cap_ = 0;
+
+    HealthInfo_1_0 health_info_ = {};
+    std::unique_ptr<HealthdDraw> healthd_draw_;
+    std::vector<animation::frame> owned_frames_;
+};
+}  // namespace android
+
 int healthd_charger_main(int argc, char** argv);
diff --git a/healthd/healthd_mode_charger_nops.cpp b/healthd/healthd_mode_charger_nops.cpp
index bcc04d5..9fe381e 100644
--- a/healthd/healthd_mode_charger_nops.cpp
+++ b/healthd/healthd_mode_charger_nops.cpp
@@ -16,45 +16,14 @@
 
 #include "healthd_mode_charger_nops.h"
 
-#include <health2/Health.h>
-#include <healthd/healthd.h>
+#include <health2impl/HalHealthLoop.h>
 
-#include <stdlib.h>
-#include <string.h>
+#include "charger_utils.h"
 
-using namespace android;
-
-// main healthd loop
-extern int healthd_main(void);
-
-// NOPs for modes that need no special action
-
-static void healthd_mode_nop_init(struct healthd_config* config);
-static int healthd_mode_nop_preparetowait(void);
-static void healthd_mode_nop_heartbeat(void);
-static void healthd_mode_nop_battery_update(struct android::BatteryProperties* props);
-
-static struct healthd_mode_ops healthd_nops = {
-        .init = healthd_mode_nop_init,
-        .preparetowait = healthd_mode_nop_preparetowait,
-        .heartbeat = healthd_mode_nop_heartbeat,
-        .battery_update = healthd_mode_nop_battery_update,
-};
-
-static void healthd_mode_nop_init(struct healthd_config* config) {
-    using android::hardware::health::V2_0::implementation::Health;
-    Health::initInstance(config);
-}
-
-static int healthd_mode_nop_preparetowait(void) {
-    return -1;
-}
-
-static void healthd_mode_nop_heartbeat(void) {}
-
-static void healthd_mode_nop_battery_update(struct android::BatteryProperties* /*props*/) {}
+using android::hardware::health::GetHealthServiceOrDefault;
+using android::hardware::health::V2_1::implementation::HalHealthLoop;
 
 int healthd_charger_nops(int /* argc */, char** /* argv */) {
-    healthd_mode_ops = &healthd_nops;
-    return healthd_main();
+    HalHealthLoop charger("charger", GetHealthServiceOrDefault());
+    return charger.StartLoop();
 }
diff --git a/healthd/include/healthd/BatteryMonitor.h b/healthd/include/healthd/BatteryMonitor.h
index 4d1d53f..d41a374 100644
--- a/healthd/include/healthd/BatteryMonitor.h
+++ b/healthd/include/healthd/BatteryMonitor.h
@@ -17,6 +17,8 @@
 #ifndef HEALTHD_BATTERYMONITOR_H
 #define HEALTHD_BATTERYMONITOR_H
 
+#include <memory>
+
 #include <batteryservice/BatteryService.h>
 #include <utils/String8.h>
 #include <utils/Vector.h>
@@ -24,6 +26,19 @@
 #include <healthd/healthd.h>
 
 namespace android {
+namespace hardware {
+namespace health {
+namespace V1_0 {
+struct HealthInfo;
+}  // namespace V1_0
+namespace V2_0 {
+struct HealthInfo;
+}  // namespace V2_0
+namespace V2_1 {
+struct HealthInfo;
+}  // namespace V2_1
+}  // namespace health
+}  // namespace hardware
 
 class BatteryMonitor {
   public:
@@ -37,12 +52,19 @@
     };
 
     BatteryMonitor();
+    ~BatteryMonitor();
     void init(struct healthd_config *hc);
-    bool update(void);
     int getChargeStatus();
     status_t getProperty(int id, struct BatteryProperty *val);
     void dumpState(int fd);
-    friend struct BatteryProperties getBatteryProperties(BatteryMonitor* batteryMonitor);
+
+    const android::hardware::health::V1_0::HealthInfo& getHealthInfo_1_0() const;
+    const android::hardware::health::V2_0::HealthInfo& getHealthInfo_2_0() const;
+    const android::hardware::health::V2_1::HealthInfo& getHealthInfo_2_1() const;
+
+    void updateValues(void);
+    void logValues(void);
+    bool isChargerOnline();
 
   private:
     struct healthd_config *mHealthdConfig;
@@ -50,10 +72,8 @@
     bool mBatteryDevicePresent;
     int mBatteryFixedCapacity;
     int mBatteryFixedTemperature;
-    struct BatteryProperties props;
+    std::unique_ptr<android::hardware::health::V2_1::HealthInfo> mHealthInfo;
 
-    int getBatteryStatus(const char* status);
-    int getBatteryHealth(const char* status);
     int readFromFile(const String8& path, std::string* buf);
     PowerSupplyType readPowerSupplyType(const String8& path);
     bool getBooleanField(const String8& path);
diff --git a/healthd/include/healthd/healthd.h b/healthd/include/healthd/healthd.h
index a900071..8ffb114 100644
--- a/healthd/include/healthd/healthd.h
+++ b/healthd/include/healthd/healthd.h
@@ -69,6 +69,8 @@
     android::String8 batteryChargeCounterPath;
     android::String8 batteryFullChargePath;
     android::String8 batteryCycleCountPath;
+    android::String8 batteryCapacityLevelPath;
+    android::String8 batteryChargeTimeToFullNowPath;
 
     int (*energyCounter)(int64_t *);
     int boot_min_cap;
diff --git a/init/Android.bp b/init/Android.bp
index ce5b12a..f28934e 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -14,6 +14,61 @@
 // limitations under the License.
 //
 
+init_common_sources = [
+    "action.cpp",
+    "action_manager.cpp",
+    "action_parser.cpp",
+    "capabilities.cpp",
+    "epoll.cpp",
+    "import_parser.cpp",
+    "interface_utils.cpp",
+    "keychords.cpp",
+    "parser.cpp",
+    "property_type.cpp",
+    "rlimit_parser.cpp",
+    "service.cpp",
+    "service_list.cpp",
+    "service_parser.cpp",
+    "service_utils.cpp",
+    "subcontext.cpp",
+    "subcontext.proto",
+    "tokenizer.cpp",
+    "util.cpp",
+]
+init_device_sources = [
+    "bootchart.cpp",
+    "builtins.cpp",
+    "devices.cpp",
+    "firmware_handler.cpp",
+    "first_stage_init.cpp",
+    "first_stage_mount.cpp",
+    "fscrypt_init_extensions.cpp",
+    "init.cpp",
+    "lmkd_service.cpp",
+    "modalias_handler.cpp",
+    "mount_handler.cpp",
+    "mount_namespace.cpp",
+    "persistent_properties.cpp",
+    "persistent_properties.proto",
+    "property_service.cpp",
+    "property_service.proto",
+    "reboot.cpp",
+    "reboot_utils.cpp",
+    "security.cpp",
+    "selabel.cpp",
+    "selinux.cpp",
+    "sigchld_handler.cpp",
+    "switch_root.cpp",
+    "uevent_listener.cpp",
+    "ueventd.cpp",
+    "ueventd_parser.cpp",
+]
+init_host_sources = [
+    "check_builtins.cpp",
+    "host_import_parser.cpp",
+    "host_init_verifier.cpp",
+]
+
 cc_defaults {
     name: "init_defaults",
     cpp_std: "experimental",
@@ -65,11 +120,13 @@
         "libavb",
         "libc++fs",
         "libcgrouprc_format",
+        "liblmkd_utils",
         "libmodprobe",
         "libprotobuf-cpp-lite",
         "libpropertyinfoserializer",
         "libpropertyinfoparser",
         "libsnapshot_init",
+        "lib_apex_manifest_proto_lite",
     ],
     shared_libs: [
         "libbacktrace",
@@ -79,10 +136,8 @@
         "libdl",
         "libext4_utils",
         "libfs_mgr",
-        "libfscrypt",
         "libgsi",
         "libhidl-gen-utils",
-        "libjsoncpp",
         "libkeyutils",
         "liblog",
         "liblogwrap",
@@ -103,55 +158,11 @@
         "init_defaults",
         "selinux_policy_version",
     ],
-    srcs: [
-        "action.cpp",
-        "action_manager.cpp",
-        "action_parser.cpp",
-        "bootchart.cpp",
-        "builtins.cpp",
-        "capabilities.cpp",
-        "devices.cpp",
-        "epoll.cpp",
-        "firmware_handler.cpp",
-        "first_stage_init.cpp",
-        "first_stage_mount.cpp",
-        "fscrypt_init_extensions.cpp",
-        "import_parser.cpp",
-        "init.cpp",
-        "interface_utils.cpp",
-        "keychords.cpp",
-        "modalias_handler.cpp",
-        "mount_handler.cpp",
-        "mount_namespace.cpp",
-        "parser.cpp",
-        "persistent_properties.cpp",
-        "persistent_properties.proto",
-        "property_service.cpp",
-        "property_service.proto",
-        "property_type.cpp",
-        "reboot.cpp",
-        "reboot_utils.cpp",
-        "security.cpp",
-        "selabel.cpp",
-        "selinux.cpp",
-        "service.cpp",
-        "service_list.cpp",
-        "service_parser.cpp",
-        "service_utils.cpp",
-        "sigchld_handler.cpp",
-        "subcontext.cpp",
-        "subcontext.proto",
-        "switch_root.cpp",
-        "rlimit_parser.cpp",
-        "tokenizer.cpp",
-        "uevent_listener.cpp",
-        "ueventd.cpp",
-        "ueventd_parser.cpp",
-        "util.cpp",
-    ],
+    srcs: init_common_sources + init_device_sources,
     whole_static_libs: [
         "libcap",
         "com.android.sysprop.apex",
+        "com.android.sysprop.init",
     ],
     header_libs: ["bootimg_headers"],
     proto: {
@@ -185,9 +196,11 @@
     static_libs: ["libinit"],
     required: [
         "e2fsdroid",
+        "init.rc",
         "mke2fs",
         "sload_f2fs",
         "make_f2fs",
+        "ueventd.rc",
     ],
     srcs: ["main.cpp"],
     symlinks: ["ueventd"],
@@ -281,41 +294,19 @@
     static_libs: [
         "libbase",
         "libselinux",
+        "libpropertyinfoserializer",
+        "libpropertyinfoparser",
     ],
     whole_static_libs: ["libcap"],
     shared_libs: [
         "libcutils",
         "libhidl-gen-utils",
+        "libhidlmetadata",
         "liblog",
         "libprocessgroup",
         "libprotobuf-cpp-lite",
     ],
-    header_libs: [
-        "libjsoncpp_headers",
-    ],
-    srcs: [
-        "action.cpp",
-        "action_manager.cpp",
-        "action_parser.cpp",
-        "capabilities.cpp",
-        "check_builtins.cpp",
-        "epoll.cpp",
-        "keychords.cpp",
-        "import_parser.cpp",
-        "interface_utils.cpp",
-        "host_import_parser.cpp",
-        "host_init_verifier.cpp",
-        "parser.cpp",
-        "rlimit_parser.cpp",
-        "tokenizer.cpp",
-        "service.cpp",
-        "service_list.cpp",
-        "service_parser.cpp",
-        "service_utils.cpp",
-        "subcontext.cpp",
-        "subcontext.proto",
-        "util.cpp",
-    ],
+    srcs: init_common_sources + init_host_sources,
     proto: {
         type: "lite",
     },
diff --git a/init/Android.mk b/init/Android.mk
index 4e4c002..07b0f95 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -52,7 +52,6 @@
     first_stage_init.cpp \
     first_stage_main.cpp \
     first_stage_mount.cpp \
-    mount_namespace.cpp \
     reboot_utils.cpp \
     selabel.cpp \
     selinux.cpp \
@@ -73,9 +72,8 @@
 LOCAL_REQUIRED_MODULES := \
    adb_debug.prop \
 
-# Set up the same mount points on the ramdisk that system-as-root contains.
+# Set up the directories that first stage init mounts on.
 LOCAL_POST_INSTALL_CMD := mkdir -p \
-    $(TARGET_RAMDISK_OUT)/apex \
     $(TARGET_RAMDISK_OUT)/debug_ramdisk \
     $(TARGET_RAMDISK_OUT)/dev \
     $(TARGET_RAMDISK_OUT)/mnt \
@@ -91,7 +89,6 @@
     libsquashfs_utils \
     liblogwrap \
     libext4_utils \
-    libfscrypt \
     libcrypto_utils \
     libsparse \
     libavb \
diff --git a/init/AndroidTest.xml b/init/AndroidTest.xml
index 94a02e6..920dc6c 100644
--- a/init/AndroidTest.xml
+++ b/init/AndroidTest.xml
@@ -17,7 +17,8 @@
     <option name="test-suite-tag" value="cts" />
     <option name="config-descriptor:metadata" key="component" value="systems" />
     <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
-    <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
     <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
         <option name="cleanup" value="true" />
         <option name="push" value="CtsInitTestCases->/data/local/tmp/CtsInitTestCases" />
diff --git a/init/README.md b/init/README.md
index cdf3487..4f0a7ec 100644
--- a/init/README.md
+++ b/init/README.md
@@ -487,6 +487,25 @@
   -f: force installation of the module even if the version of the running kernel
   and the version of the kernel for which the module was compiled do not match.
 
+`interface_start <name>` \
+`interface_restart <name>` \
+`interface_stop <name>`
+> Find the service that provides the interface _name_ if it exists and run the `start`, `restart`,
+or `stop` commands on it respectively.  _name_ may be either a fully qualified HIDL name, in which
+case it is specified as `<interface>/<instance>`, or an AIDL name, in which case it is specified as
+`aidl/<interface>` for example `android.hardware.secure_element@1.1::ISecureElement/eSE1` or
+`aidl/aidl_lazy_test_1`.
+
+> Note that these commands only act on interfaces specified by the `interface` service option, not
+on interfaces registered at runtime.
+
+> Example usage of these commands: \
+`interface_start android.hardware.secure_element@1.1::ISecureElement/eSE1`
+will start the HIDL Service that provides the `android.hardware.secure_element@1.1` and `eSI1`
+instance. \
+`interface_start aidl/aidl_lazy_test_1` will start the AIDL service that
+provides the `aidl_lazy_test_1` interface.
+
 `load_system_props`
 > (This action is deprecated and no-op.)
 
@@ -505,12 +524,23 @@
 > Used to mark the point right after /data is mounted. Used to implement the
   `class_reset_post_data` and `class_start_post_data` commands.
 
-`mkdir <path> [mode] [owner] [group]`
+`mkdir <path> [<mode>] [<owner>] [<group>] [encryption=<action>] [key=<key>]`
 > Create a directory at _path_, optionally with the given mode, owner, and
   group. If not provided, the directory is created with permissions 755 and
   owned by the root user and root group. If provided, the mode, owner and group
   will be updated if the directory exists already.
 
+ > _action_ can be one of:
+  * `None`: take no encryption action; directory will be encrypted if parent is.
+  * `Require`: encrypt directory, abort boot process if encryption fails
+  * `Attempt`: try to set an encryption policy, but continue if it fails
+  * `DeleteIfNecessary`: recursively delete directory if necessary to set
+  encryption policy.
+
+  > _key_ can be one of:
+  * `ref`: use the systemwide DE key
+  * `per_boot_ref`: use the key freshly generated on each boot.
+
 `mount_all <fstab> [ <path> ]\* [--<option>]`
 > Calls fs\_mgr\_mount\_all on the given fs\_mgr-format fstab with optional
   options "early" and "late".
@@ -572,6 +602,7 @@
   Note that this is _not_ synchronous, and even if it were, there is
   no guarantee that the operating system's scheduler will execute the
   service sufficiently to guarantee anything about the service's status.
+  See the `exec_start` command for a synchronous version of `start`.
 
 > This creates an important consequence that if the service offers
   functionality to other services, such as providing a
@@ -688,6 +719,26 @@
   `/sys/fs/ext4/${dev.mnt.blk.<mount_point>}/` to tune the block device
   characteristics in a device agnostic manner.
 
+Init responds to properties that begin with `ctl.`.  These properties take the format of
+`ctl.<command>` and the _value_ of the system property is used as a parameter, for example:
+`SetProperty("ctl.start", "logd")` will run the `start` command on `logd`.  Note that these
+properties are only settable; they will have no value when read.
+
+`ctl.start` \
+`ctl.restart` \
+`ctl.stop`
+> These are equivalent to using the `start`, `restart`, and `stop` commands on the service specified
+by the _value_ of the property.
+
+`ctl.interface_start` \
+`ctl.interface_restart` \
+`ctl.interface_stop`
+> These are equivalent to using the `interface_start`, `interface_restart`, and `interface_stop`
+commands on the interface specified by the _value_ of the property.
+
+`ctl.sigstop_on` and `ctl.sigstop_off` will turn on or off the _sigstop_ feature for the service
+specified by the _value_ of the property.  See the _Debugging init_ section below for more details
+about this feature.
 
 Boot timing
 -----------
diff --git a/init/action.cpp b/init/action.cpp
index 69e40d0..1e998ae 100644
--- a/init/action.cpp
+++ b/init/action.cpp
@@ -36,7 +36,7 @@
     builtin_arguments.args[0] = args[0];
     for (std::size_t i = 1; i < args.size(); ++i) {
         auto expanded_arg = ExpandProps(args[i]);
-        if (!expanded_arg) {
+        if (!expanded_arg.ok()) {
             return expanded_arg.error();
         }
         builtin_arguments.args[i] = std::move(*expanded_arg);
@@ -59,7 +59,7 @@
         }
 
         auto expanded_args = subcontext->ExpandArgs(args_);
-        if (!expanded_args) {
+        if (!expanded_args.ok()) {
             return expanded_args.error();
         }
         return RunBuiltinFunction(func_, *expanded_args, subcontext->context());
@@ -75,7 +75,7 @@
     builtin_arguments.args[0] = args_[0];
     for (size_t i = 1; i < args_.size(); ++i) {
         auto expanded_arg = ExpandProps(args_[i]);
-        if (!expanded_arg) {
+        if (!expanded_arg.ok()) {
             if (expanded_arg.error().message().find("doesn't exist while expanding") !=
                 std::string::npos) {
                 // If we failed because we won't have a property, use an empty string, which is
@@ -114,7 +114,7 @@
     }
 
     auto map_result = function_map_->Find(args);
-    if (!map_result) {
+    if (!map_result.ok()) {
         return Error() << map_result.error();
     }
 
@@ -134,7 +134,7 @@
 size_t Action::CheckAllCommands() const {
     size_t failures = 0;
     for (const auto& command : commands_) {
-        if (auto result = command.CheckCommand(); !result) {
+        if (auto result = command.CheckCommand(); !result.ok()) {
             LOG(ERROR) << "Command '" << command.BuildCommandString() << "' (" << filename_ << ":"
                        << command.line() << ") failed: " << result.error();
             ++failures;
@@ -169,7 +169,7 @@
 
         LOG(INFO) << "Command '" << cmd_str << "' action=" << trigger_name << " (" << filename_
                   << ":" << command.line() << ") took " << duration.count() << "ms and "
-                  << (result ? "succeeded" : "failed: " + result.error().message());
+                  << (result.ok() ? "succeeded" : "failed: " + result.error().message());
     }
 }
 
@@ -180,21 +180,24 @@
 // It takes an optional (name, value) pair, which if provided must
 // be present in property_triggers_; it skips the check of the current
 // property value for this pair.
-bool Action::CheckPropertyTriggers(const std::string& name,
-                                   const std::string& value) const {
+bool Action::CheckPropertyTriggers(const std::string& name, const std::string& value) const {
     if (property_triggers_.empty()) {
         return true;
     }
 
-    bool found = name.empty();
+    if (!name.empty()) {
+        auto it = property_triggers_.find(name);
+        if (it == property_triggers_.end()) {
+            return false;
+        }
+        const auto& trigger_value = it->second;
+        if (trigger_value != "*" && trigger_value != value) {
+            return false;
+        }
+    }
+
     for (const auto& [trigger_name, trigger_value] : property_triggers_) {
-        if (trigger_name == name) {
-            if (trigger_value != "*" && trigger_value != value) {
-                return false;
-            } else {
-                found = true;
-            }
-        } else {
+        if (trigger_name != name) {
             std::string prop_value = android::base::GetProperty(trigger_name, "");
             if (trigger_value == "*" && !prop_value.empty()) {
                 continue;
@@ -202,7 +205,7 @@
             if (trigger_value != prop_value) return false;
         }
     }
-    return found;
+    return true;
 }
 
 bool Action::CheckEvent(const EventTrigger& event_trigger) const {
diff --git a/init/action_parser.cpp b/init/action_parser.cpp
index a8e1e09..f316871 100644
--- a/init/action_parser.cpp
+++ b/init/action_parser.cpp
@@ -110,14 +110,14 @@
 
         if (!args[i].compare(0, prop_str.length(), prop_str)) {
             if (auto result = ParsePropertyTrigger(args[i], subcontext, property_triggers);
-                !result) {
+                !result.ok()) {
                 return result;
             }
         } else {
             if (!event_trigger->empty()) {
                 return Error() << "multiple event triggers are not allowed";
             }
-            if (auto result = ValidateEventTrigger(args[i]); !result) {
+            if (auto result = ValidateEventTrigger(args[i]); !result.ok()) {
                 return result;
             }
 
@@ -145,8 +145,9 @@
     std::string event_trigger;
     std::map<std::string, std::string> property_triggers;
 
-    if (auto result = ParseTriggers(triggers, action_subcontext, &event_trigger, &property_triggers);
-        !result) {
+    if (auto result =
+                ParseTriggers(triggers, action_subcontext, &event_trigger, &property_triggers);
+        !result.ok()) {
         return Error() << "ParseTriggers() failed: " << result.error();
     }
 
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 2f2ead0..200bfff 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -42,7 +42,10 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#include <memory>
+
 #include <ApexProperties.sysprop.h>
+#include <InitProperties.sysprop.h>
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -56,6 +59,8 @@
 #include <fs_mgr.h>
 #include <fscrypt/fscrypt.h>
 #include <libgsi/libgsi.h>
+#include <logwrap/logwrap.h>
+#include <private/android_filesystem_config.h>
 #include <selinux/android.h>
 #include <selinux/label.h>
 #include <selinux/selinux.h>
@@ -63,6 +68,7 @@
 
 #include "action_manager.h"
 #include "bootchart.h"
+#include "builtin_arguments.h"
 #include "fscrypt_init_extensions.h"
 #include "init.h"
 #include "mount_namespace.h"
@@ -80,6 +86,7 @@
 using namespace std::literals::string_literals;
 
 using android::base::Basename;
+using android::base::SetProperty;
 using android::base::StartsWith;
 using android::base::StringPrintf;
 using android::base::unique_fd;
@@ -138,14 +145,7 @@
     if (!write_bootloader_message(options, &err)) {
         return Error() << "Failed to set bootloader message: " << err;
     }
-    // This function should only be reached from init and not from vendor_init, and we want to
-    // immediately trigger reboot instead of relaying through property_service.  Older devices may
-    // still have paths that reach here from vendor_init, so we keep the property_set as a fallback.
-    if (getpid() == 1) {
-        TriggerShutdown("reboot,recovery");
-    } else {
-        property_set("sys.powerctl", "reboot,recovery");
-    }
+    trigger_shutdown("reboot,recovery");
     return {};
 }
 
@@ -164,7 +164,7 @@
     // They must  be started individually.
     for (const auto& service : ServiceList::GetInstance()) {
         if (service->classnames().count(args[1])) {
-            if (auto result = service->StartIfNotDisabled(); !result) {
+            if (auto result = service->StartIfNotDisabled(); !result.ok()) {
                 LOG(ERROR) << "Could not start service '" << service->name()
                            << "' as part of class '" << args[1] << "': " << result.error();
             }
@@ -186,7 +186,7 @@
     }
     for (const auto& service : ServiceList::GetInstance()) {
         if (service->classnames().count(args[1])) {
-            if (auto result = service->StartIfPostData(); !result) {
+            if (auto result = service->StartIfPostData(); !result.ok()) {
                 LOG(ERROR) << "Could not start service '" << service->name()
                            << "' as part of class '" << args[1] << "': " << result.error();
             }
@@ -227,7 +227,7 @@
 }
 
 static Result<void> do_domainname(const BuiltinArguments& args) {
-    if (auto result = WriteFile("/proc/sys/kernel/domainname", args[1]); !result) {
+    if (auto result = WriteFile("/proc/sys/kernel/domainname", args[1]); !result.ok()) {
         return Error() << "Unable to write to /proc/sys/kernel/domainname: " << result.error();
     }
     return {};
@@ -237,7 +237,7 @@
     Service* svc = ServiceList::GetInstance().FindService(args[1]);
     if (!svc) return Error() << "Could not find service";
 
-    if (auto result = svc->Enable(); !result) {
+    if (auto result = svc->Enable(); !result.ok()) {
         return Error() << "Could not enable service: " << result.error();
     }
 
@@ -246,10 +246,10 @@
 
 static Result<void> do_exec(const BuiltinArguments& args) {
     auto service = Service::MakeTemporaryOneshotService(args.args);
-    if (!service) {
+    if (!service.ok()) {
         return Error() << "Could not create exec service: " << service.error();
     }
-    if (auto result = (*service)->ExecStart(); !result) {
+    if (auto result = (*service)->ExecStart(); !result.ok()) {
         return Error() << "Could not start exec service: " << result.error();
     }
 
@@ -259,10 +259,10 @@
 
 static Result<void> do_exec_background(const BuiltinArguments& args) {
     auto service = Service::MakeTemporaryOneshotService(args.args);
-    if (!service) {
+    if (!service.ok()) {
         return Error() << "Could not create exec background service: " << service.error();
     }
-    if (auto result = (*service)->Start(); !result) {
+    if (auto result = (*service)->Start(); !result.ok()) {
         return Error() << "Could not start exec background service: " << result.error();
     }
 
@@ -276,7 +276,7 @@
         return Error() << "Service not found";
     }
 
-    if (auto result = service->ExecStart(); !result) {
+    if (auto result = service->ExecStart(); !result.ok()) {
         return Error() << "Could not start exec service: " << result.error();
     }
 
@@ -291,7 +291,7 @@
 }
 
 static Result<void> do_hostname(const BuiltinArguments& args) {
-    if (auto result = WriteFile("/proc/sys/kernel/hostname", args[1]); !result) {
+    if (auto result = WriteFile("/proc/sys/kernel/hostname", args[1]); !result.ok()) {
         return Error() << "Unable to write to /proc/sys/kernel/hostname: " << result.error();
     }
     return {};
@@ -349,7 +349,7 @@
 static Result<void> do_interface_start(const BuiltinArguments& args) {
     Service* svc = ServiceList::GetInstance().FindInterface(args[1]);
     if (!svc) return Error() << "interface " << args[1] << " not found";
-    if (auto result = svc->Start(); !result) {
+    if (auto result = svc->Start(); !result.ok()) {
         return Error() << "Could not start interface: " << result.error();
     }
     return {};
@@ -362,72 +362,61 @@
     return {};
 }
 
-// mkdir <path> [mode] [owner] [group]
-static Result<void> do_mkdir(const BuiltinArguments& args) {
-    mode_t mode = 0755;
-    Result<uid_t> uid = -1;
-    Result<gid_t> gid = -1;
-
-    switch (args.size()) {
-        case 5:
-            gid = DecodeUid(args[4]);
-            if (!gid) {
-                return Error() << "Unable to decode GID for '" << args[4] << "': " << gid.error();
-            }
-            FALLTHROUGH_INTENDED;
-        case 4:
-            uid = DecodeUid(args[3]);
-            if (!uid) {
-                return Error() << "Unable to decode UID for '" << args[3] << "': " << uid.error();
-            }
-            FALLTHROUGH_INTENDED;
-        case 3:
-            mode = std::strtoul(args[2].c_str(), 0, 8);
-            FALLTHROUGH_INTENDED;
-        case 2:
-            break;
-        default:
-            return Error() << "Unexpected argument count: " << args.size();
+static Result<void> make_dir_with_options(const MkdirOptions& options) {
+    std::string ref_basename;
+    if (options.ref_option == "ref") {
+        ref_basename = fscrypt_key_ref;
+    } else if (options.ref_option == "per_boot_ref") {
+        ref_basename = fscrypt_key_per_boot_ref;
+    } else {
+        return Error() << "Unknown key option: '" << options.ref_option << "'";
     }
-    std::string target = args[1];
+
     struct stat mstat;
-    if (lstat(target.c_str(), &mstat) != 0) {
+    if (lstat(options.target.c_str(), &mstat) != 0) {
         if (errno != ENOENT) {
-            return ErrnoError() << "lstat() failed on " << target;
+            return ErrnoError() << "lstat() failed on " << options.target;
         }
-        if (!make_dir(target, mode)) {
-            return ErrnoErrorIgnoreEnoent() << "mkdir() failed on " << target;
+        if (!make_dir(options.target, options.mode)) {
+            return ErrnoErrorIgnoreEnoent() << "mkdir() failed on " << options.target;
         }
-        if (lstat(target.c_str(), &mstat) != 0) {
-            return ErrnoError() << "lstat() failed on new " << target;
+        if (lstat(options.target.c_str(), &mstat) != 0) {
+            return ErrnoError() << "lstat() failed on new " << options.target;
         }
     }
     if (!S_ISDIR(mstat.st_mode)) {
-        return Error() << "Not a directory on " << target;
+        return Error() << "Not a directory on " << options.target;
     }
-    bool needs_chmod = (mstat.st_mode & ~S_IFMT) != mode;
-    if ((*uid != static_cast<uid_t>(-1) && *uid != mstat.st_uid) ||
-        (*gid != static_cast<gid_t>(-1) && *gid != mstat.st_gid)) {
-        if (lchown(target.c_str(), *uid, *gid) == -1) {
-            return ErrnoError() << "lchown failed on " << target;
+    bool needs_chmod = (mstat.st_mode & ~S_IFMT) != options.mode;
+    if ((options.uid != static_cast<uid_t>(-1) && options.uid != mstat.st_uid) ||
+        (options.gid != static_cast<gid_t>(-1) && options.gid != mstat.st_gid)) {
+        if (lchown(options.target.c_str(), options.uid, options.gid) == -1) {
+            return ErrnoError() << "lchown failed on " << options.target;
         }
         // chown may have cleared S_ISUID and S_ISGID, chmod again
         needs_chmod = true;
     }
     if (needs_chmod) {
-        if (fchmodat(AT_FDCWD, target.c_str(), mode, AT_SYMLINK_NOFOLLOW) == -1) {
-            return ErrnoError() << "fchmodat() failed on " << target;
+        if (fchmodat(AT_FDCWD, options.target.c_str(), options.mode, AT_SYMLINK_NOFOLLOW) == -1) {
+            return ErrnoError() << "fchmodat() failed on " << options.target;
         }
     }
     if (fscrypt_is_native()) {
-        if (fscrypt_set_directory_policy(target)) {
+        if (!FscryptSetDirectoryPolicy(ref_basename, options.fscrypt_action, options.target)) {
             return reboot_into_recovery(
-                    {"--prompt_and_wipe_data", "--reason=set_policy_failed:"s + target});
+                    {"--prompt_and_wipe_data", "--reason=set_policy_failed:"s + options.target});
         }
     }
     return {};
 }
 
+// mkdir <path> [mode] [owner] [group] [<option> ...]
+static Result<void> do_mkdir(const BuiltinArguments& args) {
+    auto options = ParseMkdir(args.args);
+    if (!options.ok()) return options.error();
+    return make_dir_with_options(*options);
+}
+
 /* umount <path> */
 static Result<void> do_umount(const BuiltinArguments& args) {
     if (umount(args[1].c_str()) < 0) {
@@ -560,21 +549,35 @@
  *
  * return code is processed based on input code
  */
-static Result<void> queue_fs_event(int code) {
+static Result<void> queue_fs_event(int code, bool userdata_remount) {
     if (code == FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION) {
+        if (userdata_remount) {
+            // FS_MGR_MNTALL_DEV_NEEDS_ENCRYPTION should only happen on FDE devices. Since we don't
+            // support userdata remount on FDE devices, this should never been triggered. Time to
+            // panic!
+            LOG(ERROR) << "Userdata remount is not supported on FDE devices. How did you get here?";
+            trigger_shutdown("reboot,requested-userdata-remount-on-fde-device");
+        }
         ActionManager::GetInstance().QueueEventTrigger("encrypt");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED) {
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "block");
+        if (userdata_remount) {
+            // FS_MGR_MNTALL_DEV_MIGHT_BE_ENCRYPTED should only happen on FDE devices. Since we
+            // don't support userdata remount on FDE devices, this should never been triggered.
+            // Time to panic!
+            LOG(ERROR) << "Userdata remount is not supported on FDE devices. How did you get here?";
+            trigger_shutdown("reboot,requested-userdata-remount-on-fde-device");
+        }
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "block");
         ActionManager::GetInstance().QueueEventTrigger("defaultcrypto");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTED) {
-        property_set("ro.crypto.state", "unencrypted");
+        SetProperty("ro.crypto.state", "unencrypted");
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NOT_ENCRYPTABLE) {
-        property_set("ro.crypto.state", "unsupported");
+        SetProperty("ro.crypto.state", "unsupported");
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NEEDS_RECOVERY) {
@@ -587,33 +590,33 @@
         return reboot_into_recovery(options);
         /* If reboot worked, there is no return. */
     } else if (code == FS_MGR_MNTALL_DEV_FILE_ENCRYPTED) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, we have device key, so we do not need to
         // do anything different from the nonencrypted case.
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_IS_METADATA_ENCRYPTED) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, vold has already set the device up, so we do not need to
         // do anything different from the nonencrypted case.
         ActionManager::GetInstance().QueueEventTrigger("nonencrypted");
         return {};
     } else if (code == FS_MGR_MNTALL_DEV_NEEDS_METADATA_ENCRYPTION) {
-        if (fscrypt_install_keyring()) {
-            return Error() << "fscrypt_install_keyring() failed";
+        if (!FscryptInstallKeyring()) {
+            return Error() << "FscryptInstallKeyring() failed";
         }
-        property_set("ro.crypto.state", "encrypted");
-        property_set("ro.crypto.type", "file");
+        SetProperty("ro.crypto.state", "encrypted");
+        SetProperty("ro.crypto.type", "file");
 
         // Although encrypted, vold has already set the device up, so we do not need to
         // do anything different from the nonencrypted case.
@@ -627,6 +630,8 @@
     return Error() << "Invalid code: " << code;
 }
 
+static int initial_mount_fstab_return_code = -1;
+
 /* mount_all <fstab> [ <path> ]* [--<options>]*
  *
  * This function might request a reboot, in which case it will
@@ -662,8 +667,9 @@
     if (!ReadFstabFromFile(fstab_file, &fstab)) {
         return Error() << "Could not read fstab";
     }
+
     auto mount_fstab_return_code = fs_mgr_mount_all(&fstab, mount_mode);
-    property_set(prop_name, std::to_string(t.duration().count()));
+    SetProperty(prop_name, std::to_string(t.duration().count()));
 
     if (import_rc && SelinuxGetVendorAndroidVersion() <= __ANDROID_API_Q__) {
         /* Paths of .rc files are specified at the 2nd argument and beyond */
@@ -673,8 +679,9 @@
     if (queue_event) {
         /* queue_fs_event will queue event based on mount_fstab return code
          * and return processed return code*/
-        auto queue_fs_result = queue_fs_event(mount_fstab_return_code);
-        if (!queue_fs_result) {
+        initial_mount_fstab_return_code = mount_fstab_return_code;
+        auto queue_fs_result = queue_fs_event(mount_fstab_return_code, false);
+        if (!queue_fs_result.ok()) {
             return Error() << "queue_fs_event() failed: " << queue_fs_result.error();
         }
     }
@@ -718,13 +725,13 @@
                        << "' from init; use the restorecon builtin directly";
     }
 
-    property_set(args[1], args[2]);
+    SetProperty(args[1], args[2]);
     return {};
 }
 
 static Result<void> do_setrlimit(const BuiltinArguments& args) {
     auto rlimit = ParseRlimit(args.args);
-    if (!rlimit) return rlimit.error();
+    if (!rlimit.ok()) return rlimit.error();
 
     if (setrlimit(rlimit->first, &rlimit->second) == -1) {
         return ErrnoError() << "setrlimit failed";
@@ -735,7 +742,7 @@
 static Result<void> do_start(const BuiltinArguments& args) {
     Service* svc = ServiceList::GetInstance().FindService(args[1]);
     if (!svc) return Error() << "service " << args[1] << " not found";
-    if (auto result = svc->Start(); !result) {
+    if (auto result = svc->Start(); !result.ok()) {
         return ErrorIgnoreEnoent() << "Could not start service: " << result.error();
     }
     return {};
@@ -832,14 +839,14 @@
         // To be consistent in vboot 1.0 and vboot 2.0 (AVB), use "system" for the partition even
         // for system as root, so it has property [partition.system.verified].
         std::string partition = entry.mount_point == "/" ? "system" : Basename(entry.mount_point);
-        property_set("partition." + partition + ".verified", std::to_string(mode));
+        SetProperty("partition." + partition + ".verified", std::to_string(mode));
     }
 
     return {};
 }
 
 static Result<void> do_write(const BuiltinArguments& args) {
-    if (auto result = WriteFile(args[1], args[2]); !result) {
+    if (auto result = WriteFile(args[1], args[2]); !result.ok()) {
         return ErrorIgnoreEnoent()
                << "Unable to write to file '" << args[1] << "': " << result.error();
     }
@@ -897,7 +904,7 @@
         }
         android::base::Timer t;
         if (S_ISREG(sb.st_mode)) {
-            if (auto result = readahead_file(args[1], readfully); !result) {
+            if (auto result = readahead_file(args[1], readfully); !result.ok()) {
                 LOG(WARNING) << "Unable to readahead '" << args[1] << "': " << result.error();
                 _exit(EXIT_FAILURE);
             }
@@ -914,7 +921,7 @@
                  ftsent = fts_read(fts.get())) {
                 if (ftsent->fts_info & FTS_F) {
                     const std::string filename = ftsent->fts_accpath;
-                    if (auto result = readahead_file(filename, readfully); !result) {
+                    if (auto result = readahead_file(filename, readfully); !result.ok()) {
                         LOG(WARNING)
                             << "Unable to readahead '" << filename << "': " << result.error();
                     }
@@ -931,10 +938,10 @@
 
 static Result<void> do_copy(const BuiltinArguments& args) {
     auto file_contents = ReadFile(args[1]);
-    if (!file_contents) {
+    if (!file_contents.ok()) {
         return Error() << "Could not read input file '" << args[1] << "': " << file_contents.error();
     }
-    if (auto result = WriteFile(args[2], *file_contents); !result) {
+    if (auto result = WriteFile(args[2], *file_contents); !result.ok()) {
         return Error() << "Could not write to output file '" << args[2] << "': " << result.error();
     }
 
@@ -943,7 +950,7 @@
 
 static Result<void> do_chown(const BuiltinArguments& args) {
     auto uid = DecodeUid(args[1]);
-    if (!uid) {
+    if (!uid.ok()) {
         return Error() << "Unable to decode UID for '" << args[1] << "': " << uid.error();
     }
 
@@ -953,7 +960,7 @@
 
     if (args.size() == 4) {
         gid = DecodeUid(args[2]);
-        if (!gid) {
+        if (!gid.ok()) {
             return Error() << "Unable to decode GID for '" << args[2] << "': " << gid.error();
         }
     }
@@ -988,7 +995,7 @@
 
 static Result<void> do_restorecon(const BuiltinArguments& args) {
     auto restorecon_info = ParseRestorecon(args.args);
-    if (!restorecon_info) {
+    if (!restorecon_info.ok()) {
         return restorecon_info.error();
     }
 
@@ -1096,7 +1103,7 @@
 static Result<void> ExecWithFunctionOnFailure(const std::vector<std::string>& args,
                                               std::function<void(const std::string&)> function) {
     auto service = Service::MakeTemporaryOneshotService(args);
-    if (!service) {
+    if (!service.ok()) {
         function("MakeTemporaryOneshotService failed: " + service.error().message());
     }
     (*service)->AddReapCallback([function](const siginfo_t& siginfo) {
@@ -1104,7 +1111,7 @@
             function(StringPrintf("Exec service failed, status %d", siginfo.si_status));
         }
     });
-    if (auto result = (*service)->ExecStart(); !result) {
+    if (auto result = (*service)->ExecStart(); !result.ok()) {
         function("ExecStart failed: " + result.error().message());
     }
     ServiceList::GetInstance().AddService(std::move(*service));
@@ -1112,19 +1119,29 @@
 }
 
 static Result<void> ExecVdcRebootOnFailure(const std::string& vdc_arg) {
+    bool should_reboot_into_recovery = true;
     auto reboot_reason = vdc_arg + "_failed";
+    if (android::sysprop::InitProperties::userspace_reboot_in_progress().value_or(false)) {
+        should_reboot_into_recovery = false;
+        reboot_reason = "userspace_failed," + vdc_arg;
+    }
 
-    auto reboot = [reboot_reason](const std::string& message) {
+    auto reboot = [reboot_reason, should_reboot_into_recovery](const std::string& message) {
         // TODO (b/122850122): support this in gsi
-        if (fscrypt_is_native() && !android::gsi::IsGsiRunning()) {
-            LOG(ERROR) << message << ": Rebooting into recovery, reason: " << reboot_reason;
-            if (auto result = reboot_into_recovery(
-                        {"--prompt_and_wipe_data", "--reason="s + reboot_reason});
-                !result) {
-                LOG(FATAL) << "Could not reboot into recovery: " << result.error();
+        if (should_reboot_into_recovery) {
+            if (fscrypt_is_native() && !android::gsi::IsGsiRunning()) {
+                LOG(ERROR) << message << ": Rebooting into recovery, reason: " << reboot_reason;
+                if (auto result = reboot_into_recovery(
+                            {"--prompt_and_wipe_data", "--reason="s + reboot_reason});
+                    !result.ok()) {
+                    LOG(FATAL) << "Could not reboot into recovery: " << result.error();
+                }
+            } else {
+                LOG(ERROR) << "Failure (reboot suppressed): " << reboot_reason;
             }
         } else {
-            LOG(ERROR) << "Failure (reboot suppressed): " << reboot_reason;
+            LOG(ERROR) << message << ": rebooting, reason: " << reboot_reason;
+            trigger_shutdown("reboot," + reboot_reason);
         }
     };
 
@@ -1132,6 +1149,25 @@
     return ExecWithFunctionOnFailure(args, reboot);
 }
 
+static Result<void> do_remount_userdata(const BuiltinArguments& args) {
+    if (initial_mount_fstab_return_code == -1) {
+        return Error() << "Calling remount_userdata too early";
+    }
+    Fstab fstab;
+    if (!ReadDefaultFstab(&fstab)) {
+        // TODO(b/135984674): should we reboot here?
+        return Error() << "Failed to read fstab";
+    }
+    // TODO(b/135984674): check that fstab contains /data.
+    if (auto rc = fs_mgr_remount_userdata_into_checkpointing(&fstab); rc < 0) {
+        trigger_shutdown("reboot,mount_userdata_failed");
+    }
+    if (auto result = queue_fs_event(initial_mount_fstab_return_code, true); !result.ok()) {
+        return Error() << "queue_fs_event() failed: " << result.error();
+    }
+    return {};
+}
+
 static Result<void> do_installkey(const BuiltinArguments& args) {
     if (!is_file_crypto()) return {};
 
@@ -1152,7 +1188,38 @@
     return {};
 }
 
-static Result<void> do_parse_apex_configs(const BuiltinArguments& args) {
+static Result<void> GenerateLinkerConfiguration() {
+    const char* linkerconfig_binary = "/system/bin/linkerconfig";
+    const char* linkerconfig_target = "/linkerconfig";
+    const char* arguments[] = {linkerconfig_binary, "--target", linkerconfig_target};
+
+    if (logwrap_fork_execvp(arraysize(arguments), arguments, nullptr, false, LOG_KLOG, false,
+                            nullptr) != 0) {
+        return ErrnoError() << "failed to execute linkerconfig";
+    }
+
+    LOG(INFO) << "linkerconfig generated " << linkerconfig_target
+              << " with mounted APEX modules info";
+
+    return {};
+}
+
+static bool IsApexUpdatable() {
+    static bool updatable = android::sysprop::ApexProperties::updatable().value_or(false);
+    return updatable;
+}
+
+static Result<void> do_update_linker_config(const BuiltinArguments&) {
+    // If APEX is not updatable, then all APEX information are already included in the first
+    // linker config generation, so there is no need to update linker configuration again.
+    if (IsApexUpdatable()) {
+        return GenerateLinkerConfiguration();
+    }
+
+    return {};
+}
+
+static Result<void> parse_apex_configs() {
     glob_t glob_result;
     static constexpr char glob_pattern[] = "/apex/*/etc/*.rc";
     const int ret = glob(glob_pattern, GLOB_MARK, nullptr, &glob_result);
@@ -1161,7 +1228,7 @@
         return Error() << "glob pattern '" << glob_pattern << "' failed";
     }
     std::vector<std::string> configs;
-    Parser parser = CreateServiceOnlyParser(ServiceList::GetInstance());
+    Parser parser = CreateServiceOnlyParser(ServiceList::GetInstance(), true);
     for (size_t i = 0; i < glob_result.gl_pathc; i++) {
         std::string path = glob_result.gl_pathv[i];
         // Filter-out /apex/<name>@<ver> paths. The paths are bind-mounted to
@@ -1191,6 +1258,49 @@
     }
 }
 
+/*
+ * Creates a directory under /data/misc/apexdata/ for each APEX.
+ */
+static Result<void> create_apex_data_dirs() {
+    auto dirp = std::unique_ptr<DIR, int (*)(DIR*)>(opendir("/apex"), closedir);
+    if (!dirp) {
+        return ErrnoError() << "Unable to open apex directory";
+    }
+    struct dirent* entry;
+    while ((entry = readdir(dirp.get())) != nullptr) {
+        if (entry->d_type != DT_DIR) continue;
+
+        const char* name = entry->d_name;
+        // skip any starting with "."
+        if (name[0] == '.') continue;
+
+        if (strchr(name, '@') != nullptr) continue;
+
+        auto path = "/data/misc/apexdata/" + std::string(name);
+        auto options = MkdirOptions{path, 0771, AID_ROOT, AID_SYSTEM, FscryptAction::kNone, "ref"};
+        make_dir_with_options(options);
+    }
+    return {};
+}
+
+static Result<void> do_perform_apex_config(const BuiltinArguments& args) {
+    auto create_dirs = create_apex_data_dirs();
+    if (!create_dirs.ok()) {
+        return create_dirs.error();
+    }
+    auto parse_configs = parse_apex_configs();
+    if (!parse_configs.ok()) {
+        return parse_configs.error();
+    }
+
+    auto update_linker_config = do_update_linker_config(args);
+    if (!update_linker_config.ok()) {
+        return update_linker_config.error();
+    }
+
+    return {};
+}
+
 static Result<void> do_enter_default_mount_ns(const BuiltinArguments& args) {
     if (SwitchToDefaultMountNamespace()) {
         return {};
@@ -1232,17 +1342,19 @@
         {"load_system_props",       {0,     0,    {false,  do_load_system_props}}},
         {"loglevel",                {1,     1,    {false,  do_loglevel}}},
         {"mark_post_data",          {0,     0,    {false,  do_mark_post_data}}},
-        {"mkdir",                   {1,     4,    {true,   do_mkdir}}},
+        {"mkdir",                   {1,     6,    {true,   do_mkdir}}},
         // TODO: Do mount operations in vendor_init.
         // mount_all is currently too complex to run in vendor_init as it queues action triggers,
         // imports rc scripts, etc.  It should be simplified and run in vendor_init context.
         // mount and umount are run in the same context as mount_all for symmetry.
         {"mount_all",               {1,     kMax, {false,  do_mount_all}}},
         {"mount",                   {3,     kMax, {false,  do_mount}}},
-        {"parse_apex_configs",      {0,     0,    {false,  do_parse_apex_configs}}},
+        {"perform_apex_config",     {0,     0,    {false,  do_perform_apex_config}}},
         {"umount",                  {1,     1,    {false,  do_umount}}},
         {"umount_all",              {1,     1,    {false,  do_umount_all}}},
+        {"update_linker_config",    {0,     0,    {false,  do_update_linker_config}}},
         {"readahead",               {1,     2,    {true,   do_readahead}}},
+        {"remount_userdata",        {0,     0,    {false,  do_remount_userdata}}},
         {"restart",                 {1,     1,    {false,  do_restart}}},
         {"restorecon",              {1,     kMax, {true,   do_restorecon}}},
         {"restorecon_recursive",    {1,     kMax, {true,   do_restorecon_recursive}}},
diff --git a/init/check_builtins.cpp b/init/check_builtins.cpp
index 2efaeea..d62ecb0 100644
--- a/init/check_builtins.cpp
+++ b/init/check_builtins.cpp
@@ -29,7 +29,9 @@
 #include <android-base/strings.h>
 
 #include "builtin_arguments.h"
+#include "host_init_verifier.h"
 #include "interface_utils.h"
+#include "property_type.h"
 #include "rlimit_parser.h"
 #include "service.h"
 #include "util.h"
@@ -50,7 +52,7 @@
 Result<void> check_chown(const BuiltinArguments& args) {
     if (!args[1].empty()) {
         auto uid = DecodeUid(args[1]);
-        if (!uid) {
+        if (!uid.ok()) {
             return Error() << "Unable to decode UID for '" << args[1] << "': " << uid.error();
         }
     }
@@ -58,7 +60,7 @@
     // GID is optional and pushes the index of path out by one if specified.
     if (args.size() == 4 && !args[2].empty()) {
         auto gid = DecodeUid(args[2]);
-        if (!gid) {
+        if (!gid.ok()) {
             return Error() << "Unable to decode GID for '" << args[2] << "': " << gid.error();
         }
     }
@@ -70,7 +72,7 @@
     ReturnIfAnyArgsEmpty();
 
     auto result = Service::MakeTemporaryOneshotService(args.args);
-    if (!result) {
+    if (!result.ok()) {
         return result.error();
     }
 
@@ -91,7 +93,7 @@
 }
 
 Result<void> check_interface_restart(const BuiltinArguments& args) {
-    if (auto result = IsKnownInterface(args[1]); !result) {
+    if (auto result = IsKnownInterface(args[1]); !result.ok()) {
         return result.error();
     }
     return {};
@@ -121,22 +123,10 @@
 }
 
 Result<void> check_mkdir(const BuiltinArguments& args) {
-    if (args.size() >= 4) {
-        if (!args[3].empty()) {
-            auto uid = DecodeUid(args[3]);
-            if (!uid) {
-                return Error() << "Unable to decode UID for '" << args[3] << "': " << uid.error();
-            }
-        }
-
-        if (args.size() == 5 && !args[4].empty()) {
-            auto gid = DecodeUid(args[4]);
-            if (!gid) {
-                return Error() << "Unable to decode GID for '" << args[4] << "': " << gid.error();
-            }
-        }
+    auto options = ParseMkdir(args.args);
+    if (!options.ok()) {
+        return options.error();
     }
-
     return {};
 }
 
@@ -144,7 +134,7 @@
     ReturnIfAnyArgsEmpty();
 
     auto restorecon_info = ParseRestorecon(args.args);
-    if (!restorecon_info) {
+    if (!restorecon_info.ok()) {
         return restorecon_info.error();
     }
 
@@ -167,7 +157,7 @@
     }
 
     if (!value.empty()) {
-        if (auto result = IsLegalPropertyValue(name, value); !result) {
+        if (auto result = IsLegalPropertyValue(name, value); !result.ok()) {
             return result.error();
         }
     }
@@ -183,6 +173,15 @@
                        << "' from init; use the restorecon builtin directly";
     }
 
+    const char* target_context = nullptr;
+    const char* type = nullptr;
+    property_info_area->GetPropertyInfo(name.c_str(), &target_context, &type);
+
+    if (!CheckType(type, value)) {
+        return Error() << "Property type check failed, value doesn't match expected type '"
+                       << (type ?: "(null)") << "'";
+    }
+
     return {};
 }
 
@@ -190,7 +189,7 @@
     ReturnIfAnyArgsEmpty();
 
     auto rlimit = ParseRlimit(args.args);
-    if (!rlimit) return rlimit.error();
+    if (!rlimit.ok()) return rlimit.error();
     return {};
 }
 
diff --git a/init/firmware_handler.cpp b/init/firmware_handler.cpp
index 1dce2d5..dff7b69 100644
--- a/init/firmware_handler.cpp
+++ b/init/firmware_handler.cpp
@@ -165,7 +165,7 @@
 
             auto result =
                     RunExternalHandler(external_handler.handler_path, external_handler.uid, uevent);
-            if (!result) {
+            if (!result.ok()) {
                 LOG(ERROR) << "Using default firmware; External firmware handler failed: "
                            << result.error();
                 return uevent.firmware;
diff --git a/init/first_stage_init.cpp b/init/first_stage_init.cpp
index fd2d766..bd71cb5 100644
--- a/init/first_stage_init.cpp
+++ b/init/first_stage_init.cpp
@@ -204,10 +204,6 @@
     // part of the product partition, e.g. because they are mounted read-write.
     CHECKCALL(mkdir("/mnt/product", 0755));
 
-    // /apex is used to mount APEXes
-    CHECKCALL(mount("tmpfs", "/apex", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
-                    "mode=0755,uid=0,gid=0"));
-
     // /debug_ramdisk is used to preserve additional files from the debug ramdisk
     CHECKCALL(mount("tmpfs", "/debug_ramdisk", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
                     "mode=0755,uid=0,gid=0"));
@@ -239,11 +235,16 @@
     }
 
     Modprobe m({"/lib/modules"});
-    if (!m.LoadListedModules()) {
-        LOG(FATAL) << "Failed to load kernel modules";
+    auto want_console = ALLOW_FIRST_STAGE_CONSOLE && FirstStageConsole(cmdline);
+    if (!m.LoadListedModules(!want_console)) {
+        if (want_console) {
+            LOG(ERROR) << "Failed to load kernel modules, starting console";
+        } else {
+            LOG(FATAL) << "Failed to load kernel modules";
+        }
     }
 
-    if (ALLOW_FIRST_STAGE_CONSOLE && FirstStageConsole(cmdline)) {
+    if (want_console) {
         StartConsole();
     }
 
diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index 9121bac..21663e6 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -21,6 +21,7 @@
 #include <unistd.h>
 
 #include <chrono>
+#include <map>
 #include <memory>
 #include <set>
 #include <string>
@@ -29,11 +30,13 @@
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
+#include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <fs_avb/fs_avb.h>
 #include <fs_mgr.h>
 #include <fs_mgr_dm_linear.h>
 #include <fs_mgr_overlayfs.h>
+#include <libfiemap/image_manager.h>
 #include <libgsi/libgsi.h>
 #include <liblp/liblp.h>
 #include <libsnapshot/snapshot.h>
@@ -44,8 +47,11 @@
 #include "uevent_listener.h"
 #include "util.h"
 
+using android::base::ReadFileToString;
 using android::base::Split;
+using android::base::StringPrintf;
 using android::base::Timer;
+using android::fiemap::IImageManager;
 using android::fs_mgr::AvbHandle;
 using android::fs_mgr::AvbHandleStatus;
 using android::fs_mgr::AvbHashtreeResult;
@@ -56,7 +62,6 @@
 using android::fs_mgr::ReadFstabFromDt;
 using android::fs_mgr::SkipMountingPartitions;
 using android::fs_mgr::TransformFstabForDsu;
-using android::init::WriteFile;
 using android::snapshot::SnapshotManager;
 
 using namespace std::literals;
@@ -93,7 +98,8 @@
     bool IsDmLinearEnabled();
     void GetDmLinearMetadataDevice(std::set<std::string>* devices);
     bool InitDmLinearBackingDevices(const android::fs_mgr::LpMetadata& metadata);
-    void UseGsiIfPresent();
+    void UseDsuIfPresent();
+    void PreloadAvbKeys();
 
     ListenerAction UeventCallback(const Uevent& uevent, std::set<std::string>* required_devices);
 
@@ -102,13 +108,16 @@
     virtual bool SetUpDmVerity(FstabEntry* fstab_entry) = 0;
 
     bool need_dm_verity_;
-    bool gsi_not_on_userdata_ = false;
+    bool dsu_not_on_userdata_ = false;
 
     Fstab fstab_;
     std::string lp_metadata_partition_;
     std::string super_partition_name_;
     std::unique_ptr<DeviceHandler> device_handler_;
     UeventListener uevent_listener_;
+    // Reads all AVB keys before chroot into /system, as they might be used
+    // later when mounting other partitions, e.g., /vendor and /product.
+    std::map<std::string, std::vector<std::string>> preload_avb_key_blobs_;
 };
 
 class FirstStageMountVBootV1 : public FirstStageMount {
@@ -507,11 +516,57 @@
     return mounted;
 }
 
+void FirstStageMount::PreloadAvbKeys() {
+    for (const auto& entry : fstab_) {
+        // No need to cache the key content if it's empty, or is already cached.
+        if (entry.avb_keys.empty() || preload_avb_key_blobs_.count(entry.avb_keys)) {
+            continue;
+        }
+
+        // Determines all key paths first.
+        std::vector<std::string> key_paths;
+        if (is_dir(entry.avb_keys.c_str())) {  // fstab_keys might be a dir, e.g., /avb.
+            const char* avb_key_dir = entry.avb_keys.c_str();
+            std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(avb_key_dir), closedir);
+            if (!dir) {
+                LOG(ERROR) << "Failed to opendir: " << dir;
+                continue;
+            }
+            // Gets all key pathes under the dir.
+            struct dirent* de;
+            while ((de = readdir(dir.get()))) {
+                if (de->d_type != DT_REG) continue;
+                std::string full_path = StringPrintf("%s/%s", avb_key_dir, de->d_name);
+                key_paths.emplace_back(std::move(full_path));
+            }
+            std::sort(key_paths.begin(), key_paths.end());
+        } else {
+            // avb_keys are key paths separated by ":", if it's not a dir.
+            key_paths = Split(entry.avb_keys, ":");
+        }
+
+        // Reads the key content then cache it.
+        std::vector<std::string> key_blobs;
+        for (const auto& path : key_paths) {
+            std::string key_value;
+            if (!ReadFileToString(path, &key_value)) {
+                continue;
+            }
+            key_blobs.emplace_back(std::move(key_value));
+        }
+
+        // Maps entry.avb_keys to actual key blobs.
+        preload_avb_key_blobs_[entry.avb_keys] = std::move(key_blobs);
+    }
+}
+
 // If system is in the fstab then we're not a system-as-root device, and in
 // this case, we mount system first then pivot to it.  From that point on,
 // we are effectively identical to a system-as-root device.
 bool FirstStageMount::TrySwitchSystemAsRoot() {
-    UseGsiIfPresent();
+    UseDsuIfPresent();
+    // Preloading all AVB keys from the ramdisk before switching root to /system.
+    PreloadAvbKeys();
 
     auto system_partition = std::find_if(fstab_.begin(), fstab_.end(), [](const auto& entry) {
         return entry.mount_point == "/system";
@@ -520,7 +575,7 @@
     if (system_partition == fstab_.end()) return true;
 
     if (MountPartition(system_partition, false /* erase_same_mounts */)) {
-        if (gsi_not_on_userdata_ && fs_mgr_verity_is_check_at_most_once(*system_partition)) {
+        if (dsu_not_on_userdata_ && fs_mgr_verity_is_check_at_most_once(*system_partition)) {
             LOG(ERROR) << "check_most_at_once forbidden on external media";
             return false;
         }
@@ -556,6 +611,14 @@
             continue;
         }
 
+        // Skip raw partition entries such as boot, dtbo, etc.
+        // Having emmc fstab entries allows us to probe current->vbmeta_partition
+        // in InitDevices() when they are AVB chained partitions.
+        if (current->fs_type == "emmc") {
+            ++current;
+            continue;
+        }
+
         Fstab::iterator end;
         if (!MountPartition(current, false /* erase_same_mounts */, &end)) {
             if (current->fs_mgr_flags.no_fail) {
@@ -582,63 +645,64 @@
     }
 
     // heads up for instantiating required device(s) for overlayfs logic
-    const auto devices = fs_mgr_overlayfs_required_devices(&fstab_);
-    for (auto const& device : devices) {
-        if (android::base::StartsWith(device, "/dev/block/by-name/")) {
-            InitRequiredDevices({basename(device.c_str())});
-        } else {
-            InitMappedDevice(device);
+    auto init_devices = [this](std::set<std::string> devices) -> bool {
+        for (auto iter = devices.begin(); iter != devices.end();) {
+            if (android::base::StartsWith(*iter, "/dev/block/dm-")) {
+                if (!InitMappedDevice(*iter)) return false;
+                iter = devices.erase(iter);
+            } else {
+                iter++;
+            }
         }
-    }
+        return InitRequiredDevices(std::move(devices));
+    };
+    MapScratchPartitionIfNeeded(&fstab_, init_devices);
 
     fs_mgr_overlayfs_mount_all(&fstab_);
 
     return true;
 }
 
-void FirstStageMount::UseGsiIfPresent() {
+void FirstStageMount::UseDsuIfPresent() {
     std::string error;
 
     if (!android::gsi::CanBootIntoGsi(&error)) {
-        LOG(INFO) << "GSI " << error << ", proceeding with normal boot";
+        LOG(INFO) << "DSU " << error << ", proceeding with normal boot";
         return;
     }
 
-    auto metadata = android::fs_mgr::ReadFromImageFile(gsi::kDsuLpMetadataFile);
-    if (!metadata) {
-        LOG(ERROR) << "GSI partition layout could not be read";
+    auto init_devices = [this](std::set<std::string> devices) -> bool {
+        if (devices.count("userdata") == 0 || devices.size() > 1) {
+            dsu_not_on_userdata_ = true;
+        }
+        return InitRequiredDevices(std::move(devices));
+    };
+    std::string active_dsu;
+    if (!gsi::GetActiveDsu(&active_dsu)) {
+        LOG(ERROR) << "Failed to GetActiveDsu";
         return;
     }
-
-    if (!InitDmLinearBackingDevices(*metadata.get())) {
-        return;
-    }
-
-    // Find the super name. PartitionOpener will ensure this translates to the
-    // correct block device path.
-    auto super = GetMetadataSuperBlockDevice(*metadata.get());
-    auto super_name = android::fs_mgr::GetBlockDevicePartitionName(*super);
-    if (!android::fs_mgr::CreateLogicalPartitions(*metadata.get(), super_name)) {
-        LOG(ERROR) << "GSI partition layout could not be instantiated";
+    LOG(INFO) << "DSU slot: " << active_dsu;
+    auto images = IImageManager::Open("dsu/" + active_dsu, 0ms);
+    if (!images || !images->MapAllImages(init_devices)) {
+        LOG(ERROR) << "DSU partition layout could not be instantiated";
         return;
     }
 
     if (!android::gsi::MarkSystemAsGsi()) {
-        PLOG(ERROR) << "GSI indicator file could not be written";
+        PLOG(ERROR) << "DSU indicator file could not be written";
         return;
     }
 
     std::string lp_names = "";
     std::vector<std::string> dsu_partitions;
-    for (auto&& partition : metadata->partitions) {
-        auto name = fs_mgr::GetPartitionName(partition);
+    for (auto&& name : images->GetAllBackingImages()) {
         dsu_partitions.push_back(name);
         lp_names += name + ",";
     }
     // Publish the logical partition names for TransformFstabForDsu
     WriteFile(gsi::kGsiLpNamesFile, lp_names);
     TransformFstabForDsu(&fstab_, dsu_partitions);
-    gsi_not_on_userdata_ = (super_name != "userdata");
 }
 
 bool FirstStageMountVBootV1::GetDmVerityDevices(std::set<std::string>* devices) {
@@ -766,7 +830,8 @@
                        << fstab_entry->mount_point;
             return true;  // Returns true to mount the partition directly.
         } else {
-            auto avb_standalone_handle = AvbHandle::LoadAndVerifyVbmeta(*fstab_entry);
+            auto avb_standalone_handle = AvbHandle::LoadAndVerifyVbmeta(
+                    *fstab_entry, preload_avb_key_blobs_[fstab_entry->avb_keys]);
             if (!avb_standalone_handle) {
                 LOG(ERROR) << "Failed to load offline vbmeta for " << fstab_entry->mount_point;
                 // Fallbacks to built-in hashtree if fs_mgr_flags.avb is set.
diff --git a/init/fscrypt_init_extensions.cpp b/init/fscrypt_init_extensions.cpp
index bbebbe8..fbd8189 100644
--- a/init/fscrypt_init_extensions.cpp
+++ b/init/fscrypt_init_extensions.cpp
@@ -39,19 +39,21 @@
 
 #define TAG "fscrypt"
 
-static int set_policy_on(const std::string& ref_basename, const std::string& dir);
+using namespace android::fscrypt;
 
-int fscrypt_install_keyring() {
+bool FscryptInstallKeyring() {
+    if (keyctl_search(KEY_SPEC_SESSION_KEYRING, "keyring", "fscrypt", 0) != -1) {
+        LOG(INFO) << "Keyring is already created";
+        return true;
+    }
     key_serial_t device_keyring = add_key("keyring", "fscrypt", 0, 0, KEY_SPEC_SESSION_KEYRING);
 
     if (device_keyring == -1) {
         PLOG(ERROR) << "Failed to create keyring";
-        return -1;
+        return false;
     }
-
     LOG(INFO) << "Keyring created with id " << device_keyring << " in process " << getpid();
-
-    return 0;
+    return true;
 }
 
 // TODO(b/139378601): use a single central implementation of this.
@@ -95,131 +97,57 @@
     }
 }
 
-int fscrypt_set_directory_policy(const std::string& dir) {
-    const std::string prefix = "/data/";
-
-    if (!android::base::StartsWith(dir, prefix)) {
-        return 0;
-    }
-
-    // Special-case /data/media/obb per b/64566063
-    if (dir == "/data/media/obb") {
-        // Try to set policy on this directory, but if it is non-empty this may fail.
-        set_policy_on(fscrypt_key_ref, dir);
-        return 0;
-    }
-
-    // Only set policy on first level /data directories
-    // To make this less restrictive, consider using a policy file.
-    // However this is overkill for as long as the policy is simply
-    // to apply a global policy to all /data folders created via makedir
-    if (dir.find_first_of('/', prefix.size()) != std::string::npos) {
-        return 0;
-    }
-
-    // Special case various directories that must not be encrypted,
-    // often because their subdirectories must be encrypted.
-    // This isn't a nice way to do this, see b/26641735
-    std::vector<std::string> directories_to_exclude = {
-        "lost+found",
-        "system_ce", "system_de",
-        "misc_ce", "misc_de",
-        "vendor_ce", "vendor_de",
-        "media",
-        "data", "user", "user_de",
-        "apex", "preloads", "app-staging",
-        "gsi",
-    };
-    for (const auto& d : directories_to_exclude) {
-        if ((prefix + d) == dir) {
-            LOG(INFO) << "Not setting policy on " << dir;
-            return 0;
-        }
-    }
-    std::vector<std::string> per_boot_directories = {
-            "per_boot",
-    };
-    for (const auto& d : per_boot_directories) {
-        if ((prefix + d) == dir) {
-            LOG(INFO) << "Setting per_boot key on " << dir;
-            return set_policy_on(fscrypt_key_per_boot_ref, dir);
-        }
-    }
-    int err = set_policy_on(fscrypt_key_ref, dir);
-    if (err == 0) {
-        return 0;
-    }
-    // Empty these directories if policy setting fails.
-    std::vector<std::string> wipe_on_failure = {
-            "rollback", "rollback-observer",  // b/139193659
-    };
-    for (const auto& d : wipe_on_failure) {
-        if ((prefix + d) == dir) {
-            LOG(ERROR) << "Setting policy failed, deleting: " << dir;
-            delete_dir_contents(dir);
-            err = set_policy_on(fscrypt_key_ref, dir);
-            break;
-        }
-    }
-    return err;
-}
-
-static int parse_encryption_options_string(const std::string& options_string,
-                                           std::string* contents_mode_ret,
-                                           std::string* filenames_mode_ret,
-                                           int* policy_version_ret) {
-    auto parts = android::base::Split(options_string, ":");
-
-    if (parts.size() != 3) {
-        return -1;
-    }
-
-    *contents_mode_ret = parts[0];
-    *filenames_mode_ret = parts[1];
-    if (!android::base::StartsWith(parts[2], 'v') ||
-        !android::base::ParseInt(&parts[2][1], policy_version_ret)) {
-        return -1;
-    }
-
-    return 0;
-}
-
-// Set an encryption policy on the given directory.  The policy (key reference
+// Look up an encryption policy  The policy (key reference
 // and encryption options) to use is read from files that were written by vold.
-static int set_policy_on(const std::string& ref_basename, const std::string& dir) {
+static bool LookupPolicy(const std::string& ref_basename, EncryptionPolicy* policy) {
     std::string ref_filename = std::string("/data") + ref_basename;
-    std::string key_ref;
-    if (!android::base::ReadFileToString(ref_filename, &key_ref)) {
-        LOG(ERROR) << "Unable to read system policy to set on " << dir;
-        return -1;
+    if (!android::base::ReadFileToString(ref_filename, &policy->key_raw_ref)) {
+        LOG(ERROR) << "Unable to read system policy with name " << ref_filename;
+        return false;
     }
 
     auto options_filename = std::string("/data") + fscrypt_key_mode;
     std::string options_string;
     if (!android::base::ReadFileToString(options_filename, &options_string)) {
         LOG(ERROR) << "Cannot read encryption options string";
-        return -1;
+        return false;
     }
-
-    std::string contents_mode;
-    std::string filenames_mode;
-    int policy_version = 0;
-
-    if (parse_encryption_options_string(options_string, &contents_mode, &filenames_mode,
-                                        &policy_version)) {
+    if (!ParseOptions(options_string, &policy->options)) {
         LOG(ERROR) << "Invalid encryption options string: " << options_string;
-        return -1;
+        return false;
     }
+    return true;
+}
 
-    int result =
-            fscrypt_policy_ensure(dir.c_str(), key_ref.c_str(), key_ref.length(),
-                                  contents_mode.c_str(), filenames_mode.c_str(), policy_version);
-    if (result) {
-        LOG(ERROR) << android::base::StringPrintf("Setting %02x%02x%02x%02x policy on %s failed!",
-                                                  key_ref[0], key_ref[1], key_ref[2], key_ref[3],
-                                                  dir.c_str());
-        return -1;
+static bool EnsurePolicyOrLog(const EncryptionPolicy& policy, const std::string& dir) {
+    if (!EnsurePolicy(policy, dir)) {
+        std::string ref_hex;
+        BytesToHex(policy.key_raw_ref, &ref_hex);
+        LOG(ERROR) << "Setting " << ref_hex << " policy on " << dir << " failed!";
+        return false;
     }
+    return true;
+}
 
-    return 0;
+static bool SetPolicyOn(const std::string& ref_basename, const std::string& dir) {
+    EncryptionPolicy policy;
+    if (!LookupPolicy(ref_basename, &policy)) return false;
+    if (!EnsurePolicyOrLog(policy, dir)) return false;
+    return true;
+}
+
+bool FscryptSetDirectoryPolicy(const std::string& ref_basename, FscryptAction action,
+                               const std::string& dir) {
+    if (action == FscryptAction::kNone) {
+        return true;
+    }
+    if (SetPolicyOn(ref_basename, dir) || action == FscryptAction::kAttempt) {
+        return true;
+    }
+    if (action == FscryptAction::kDeleteIfNecessary) {
+        LOG(ERROR) << "Setting policy failed, deleting: " << dir;
+        delete_dir_contents(dir);
+        return SetPolicyOn(ref_basename, dir);
+    }
+    return false;
 }
diff --git a/init/fscrypt_init_extensions.h b/init/fscrypt_init_extensions.h
index 2163ef6..d357bb2 100644
--- a/init/fscrypt_init_extensions.h
+++ b/init/fscrypt_init_extensions.h
@@ -18,5 +18,13 @@
 
 #include <string>
 
-int fscrypt_install_keyring();
-int fscrypt_set_directory_policy(const std::string& dir);
+enum class FscryptAction {
+    kNone,
+    kAttempt,
+    kRequire,
+    kDeleteIfNecessary,
+};
+
+bool FscryptInstallKeyring();
+bool FscryptSetDirectoryPolicy(const std::string& ref_basename, FscryptAction action,
+                               const std::string& dir);
diff --git a/init/host_init_stubs.h b/init/host_init_stubs.h
index 5dd5cf1..caa8f8d 100644
--- a/init/host_init_stubs.h
+++ b/init/host_init_stubs.h
@@ -26,6 +26,7 @@
 
 // android/api-level.h
 #define __ANDROID_API_P__ 28
+#define __ANDROID_API_Q__ 29
 #define __ANDROID_API_R__ 30
 
 // sys/system_properties.h
@@ -34,24 +35,10 @@
 namespace android {
 namespace init {
 
-// init.h
-inline void TriggerShutdown(const std::string&) {
-    abort();
-}
-
 // property_service.h
 inline bool CanReadProperty(const std::string&, const std::string&) {
     return true;
 }
-inline uint32_t SetProperty(const std::string& key, const std::string& value) {
-    android::base::SetProperty(key, value);
-    return 0;
-}
-inline uint32_t (*property_set)(const std::string& name, const std::string& value) = SetProperty;
-inline uint32_t HandlePropertySet(const std::string&, const std::string&, const std::string&,
-                                  const ucred&, std::string*) {
-    return 0;
-}
 
 // reboot_utils.h
 inline void SetFatalRebootTarget() {}
diff --git a/init/host_init_verifier.cpp b/init/host_init_verifier.cpp
index b2402b3..0bd4df4 100644
--- a/init/host_init_verifier.cpp
+++ b/init/host_init_verifier.cpp
@@ -14,6 +14,8 @@
 // limitations under the License.
 //
 
+#include "host_init_verifier.h"
+
 #include <errno.h>
 #include <getopt.h>
 #include <pwd.h>
@@ -30,6 +32,8 @@
 #include <android-base/logging.h>
 #include <android-base/parseint.h>
 #include <android-base/strings.h>
+#include <hidl/metadata.h>
+#include <property_info_serializer/property_info_serializer.h>
 
 #include "action.h"
 #include "action_manager.h"
@@ -52,6 +56,10 @@
 using android::base::ParseInt;
 using android::base::ReadFileToString;
 using android::base::Split;
+using android::properties::BuildTrie;
+using android::properties::ParsePropertyInfoFile;
+using android::properties::PropertyInfoArea;
+using android::properties::PropertyInfoEntry;
 
 static std::vector<std::string> passwd_files;
 
@@ -142,43 +150,89 @@
 #include "generated_stub_builtin_function_map.h"
 
 void PrintUsage() {
-    std::cout << "usage: host_init_verifier [-p FILE] -i FILE <init rc file>\n"
+    std::cout << "usage: host_init_verifier [options] <init rc file>\n"
                  "\n"
                  "Tests an init script for correctness\n"
                  "\n"
                  "-p FILE\tSearch this passwd file for users and groups\n"
-                 "-i FILE\tParse this JSON file for the HIDL interface inheritance hierarchy\n"
+                 "--property_contexts=FILE\t Use this file for property_contexts\n"
               << std::endl;
 }
 
+Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy() {
+    InterfaceInheritanceHierarchyMap result;
+    for (const HidlInterfaceMetadata& iface : HidlInterfaceMetadata::all()) {
+        std::set<FQName> inherited_interfaces;
+        for (const std::string& intf : iface.inherited) {
+            FQName fqname;
+            if (!fqname.setTo(intf)) {
+                return Error() << "Unable to parse interface '" << intf << "'";
+            }
+            inherited_interfaces.insert(fqname);
+        }
+        FQName fqname;
+        if (!fqname.setTo(iface.name)) {
+            return Error() << "Unable to parse interface '" << iface.name << "'";
+        }
+        result[fqname] = inherited_interfaces;
+    }
+
+    return result;
+}
+
+const PropertyInfoArea* property_info_area;
+
+void HandlePropertyContexts(const std::string& filename,
+                            std::vector<PropertyInfoEntry>* property_infos) {
+    auto file_contents = std::string();
+    if (!ReadFileToString(filename, &file_contents)) {
+        PLOG(ERROR) << "Could not read properties from '" << filename << "'";
+        exit(EXIT_FAILURE);
+    }
+
+    auto errors = std::vector<std::string>{};
+    ParsePropertyInfoFile(file_contents, true, property_infos, &errors);
+    for (const auto& error : errors) {
+        LOG(ERROR) << "Could not read line from '" << filename << "': " << error;
+    }
+    if (!errors.empty()) {
+        exit(EXIT_FAILURE);
+    }
+}
+
 int main(int argc, char** argv) {
     android::base::InitLogging(argv, &android::base::StdioLogger);
     android::base::SetMinimumLogSeverity(android::base::ERROR);
 
-    std::string interface_inheritance_hierarchy_file;
+    auto property_infos = std::vector<PropertyInfoEntry>();
 
     while (true) {
+        static const char kPropertyContexts[] = "property-contexts=";
         static const struct option long_options[] = {
                 {"help", no_argument, nullptr, 'h'},
+                {kPropertyContexts, required_argument, nullptr, 0},
                 {nullptr, 0, nullptr, 0},
         };
 
-        int arg = getopt_long(argc, argv, "p:i:", long_options, nullptr);
+        int option_index;
+        int arg = getopt_long(argc, argv, "p:", long_options, &option_index);
 
         if (arg == -1) {
             break;
         }
 
         switch (arg) {
+            case 0:
+                if (long_options[option_index].name == kPropertyContexts) {
+                    HandlePropertyContexts(optarg, &property_infos);
+                }
+                break;
             case 'h':
                 PrintUsage();
                 return EXIT_FAILURE;
             case 'p':
                 passwd_files.emplace_back(optarg);
                 break;
-            case 'i':
-                interface_inheritance_hierarchy_file = optarg;
-                break;
             default:
                 std::cerr << "getprop: getopt returned invalid result: " << arg << std::endl;
                 return EXIT_FAILURE;
@@ -188,19 +242,28 @@
     argc -= optind;
     argv += optind;
 
-    if (argc != 1 || interface_inheritance_hierarchy_file.empty()) {
+    if (argc != 1) {
         PrintUsage();
         return EXIT_FAILURE;
     }
 
-    auto interface_inheritance_hierarchy_map =
-            ReadInterfaceInheritanceHierarchy(interface_inheritance_hierarchy_file);
-    if (!interface_inheritance_hierarchy_map) {
+    auto interface_inheritance_hierarchy_map = ReadInterfaceInheritanceHierarchy();
+    if (!interface_inheritance_hierarchy_map.ok()) {
         LOG(ERROR) << interface_inheritance_hierarchy_map.error();
         return EXIT_FAILURE;
     }
     SetKnownInterfaces(*interface_inheritance_hierarchy_map);
 
+    std::string serialized_contexts;
+    std::string trie_error;
+    if (!BuildTrie(property_infos, "u:object_r:default_prop:s0", "string", &serialized_contexts,
+                   &trie_error)) {
+        LOG(ERROR) << "Unable to serialize property contexts: " << trie_error;
+        return EXIT_FAILURE;
+    }
+
+    property_info_area = reinterpret_cast<const PropertyInfoArea*>(serialized_contexts.c_str());
+
     const BuiltinFunctionMap& function_map = GetBuiltinFunctionMap();
     Action::set_function_map(&function_map);
     ActionManager& am = ActionManager::GetInstance();
diff --git a/libmemunreachable/Binder.h b/init/host_init_verifier.h
similarity index 70%
rename from libmemunreachable/Binder.h
rename to init/host_init_verifier.h
index bf4fd3e..5d24f2a 100644
--- a/libmemunreachable/Binder.h
+++ b/init/host_init_verifier.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,15 +14,14 @@
  * limitations under the License.
  */
 
-#ifndef LIBMEMUNREACHABLE_BINDER_H_
-#define LIBMEMUNREACHABLE_BINDER_H_
+#pragma once
 
-#include "Allocator.h"
+#include <property_info_parser/property_info_parser.h>
 
 namespace android {
+namespace init {
 
-bool BinderReferences(allocator::vector<uintptr_t>& refs);
+extern const android::properties::PropertyInfoArea* property_info_area;
 
+}  // namespace init
 }  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_BINDER_H_
diff --git a/init/import_parser.cpp b/init/import_parser.cpp
index 1a43508..e4b25ca 100644
--- a/init/import_parser.cpp
+++ b/init/import_parser.cpp
@@ -30,7 +30,7 @@
     }
 
     auto conf_file = ExpandProps(args[1]);
-    if (!conf_file) {
+    if (!conf_file.ok()) {
         return Error() << "Could not expand import: " << conf_file.error();
     }
 
diff --git a/init/init.cpp b/init/init.cpp
index f775d8f..5bf1b36 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -59,6 +59,7 @@
 #include "first_stage_mount.h"
 #include "import_parser.h"
 #include "keychords.h"
+#include "lmkd_service.h"
 #include "mount_handler.h"
 #include "mount_namespace.h"
 #include "property_service.h"
@@ -80,6 +81,7 @@
 using android::base::boot_clock;
 using android::base::GetProperty;
 using android::base::ReadFileToString;
+using android::base::SetProperty;
 using android::base::StringPrintf;
 using android::base::Timer;
 using android::base::Trim;
@@ -90,8 +92,6 @@
 
 static int property_triggers_enabled = 0;
 
-static char qemu[32];
-
 static int signal_fd = -1;
 static int property_fd = -1;
 
@@ -100,7 +100,6 @@
 static std::string wait_prop_value;
 static std::string shutdown_command;
 static bool do_shutdown = false;
-static bool load_debug_prop = false;
 
 static std::unique_ptr<Subcontext> subcontext;
 
@@ -122,11 +121,12 @@
 }
 
 // parser that only accepts new services
-Parser CreateServiceOnlyParser(ServiceList& service_list) {
+Parser CreateServiceOnlyParser(ServiceList& service_list, bool from_apex) {
     Parser parser;
 
-    parser.AddSectionParser("service", std::make_unique<ServiceParser>(
-                                               &service_list, subcontext.get(), std::nullopt));
+    parser.AddSectionParser("service",
+                            std::make_unique<ServiceParser>(&service_list, subcontext.get(),
+                                                            std::nullopt, from_apex));
     return parser;
 }
 
@@ -135,7 +135,7 @@
 
     std::string bootscript = GetProperty("ro.boot.init_rc", "");
     if (bootscript.empty()) {
-        parser.ParseConfig("/init.rc");
+        parser.ParseConfig("/system/etc/init/hw/init.rc");
         if (!parser.ParseConfig("/system/etc/init")) {
             late_import_paths.emplace_back("/system/etc/init");
         }
@@ -179,7 +179,7 @@
     waiting_for_prop.reset();
 }
 
-void TriggerShutdown(const std::string& command) {
+static void TriggerShutdown(const std::string& command) {
     // We can't call HandlePowerctlMessage() directly in this function,
     // because it modifies the contents of the action queue, which can cause the action queue
     // to get into a bad state if this function is called from a command being executed by the
@@ -207,7 +207,7 @@
     // to wait.
     if (name == kColdBootDoneProp) {
         auto time_waited = waiting_for_prop ? waiting_for_prop->duration().count() : 0;
-        property_set("ro.boottime.init.cold_boot_wait", std::to_string(time_waited));
+        SetProperty("ro.boottime.init.cold_boot_wait", std::to_string(time_waited));
     }
 
     if (waiting_for_prop) {
@@ -237,7 +237,7 @@
 
         auto restart_time = s->time_started() + s->restart_period();
         if (boot_clock::now() > restart_time) {
-            if (auto result = s->Start(); !result) {
+            if (auto result = s->Start(); !result.ok()) {
                 LOG(ERROR) << "Could not restart process '" << s->name() << "': " << result.error();
             }
         } else {
@@ -333,7 +333,7 @@
         return false;
     }
 
-    if (auto result = function.action(svc); !result) {
+    if (auto result = function.action(svc); !result.ok()) {
         LOG(ERROR) << "Control message: Could not ctl." << msg << " for '" << name
                    << "' from pid: " << pid << " (" << process_cmdline << "): " << result.error();
         return false;
@@ -363,85 +363,15 @@
     return {};
 }
 
-static void import_kernel_nv(const std::string& key, const std::string& value, bool for_emulator) {
-    if (key.empty()) return;
-
-    if (for_emulator) {
-        // In the emulator, export any kernel option with the "ro.kernel." prefix.
-        property_set("ro.kernel." + key, value);
-        return;
-    }
-
-    if (key == "qemu") {
-        strlcpy(qemu, value.c_str(), sizeof(qemu));
-    } else if (android::base::StartsWith(key, "androidboot.")) {
-        property_set("ro.boot." + key.substr(12), value);
-    }
-}
-
 static void export_oem_lock_status() {
     if (!android::base::GetBoolProperty("ro.oem_unlock_supported", false)) {
         return;
     }
-    import_kernel_cmdline(
-            false, [](const std::string& key, const std::string& value, bool in_qemu) {
-                if (key == "androidboot.verifiedbootstate") {
-                    property_set("ro.boot.flash.locked", value == "orange" ? "0" : "1");
-                }
-            });
-}
-
-static void export_kernel_boot_props() {
-    constexpr const char* UNSET = "";
-    struct {
-        const char *src_prop;
-        const char *dst_prop;
-        const char *default_value;
-    } prop_map[] = {
-        { "ro.boot.serialno",   "ro.serialno",   UNSET, },
-        { "ro.boot.mode",       "ro.bootmode",   "unknown", },
-        { "ro.boot.baseband",   "ro.baseband",   "unknown", },
-        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
-        { "ro.boot.hardware",   "ro.hardware",   "unknown", },
-        { "ro.boot.revision",   "ro.revision",   "0", },
-    };
-    for (const auto& prop : prop_map) {
-        std::string value = GetProperty(prop.src_prop, prop.default_value);
-        if (value != UNSET)
-            property_set(prop.dst_prop, value);
-    }
-}
-
-static void process_kernel_dt() {
-    if (!is_android_dt_value_expected("compatible", "android,firmware")) {
-        return;
-    }
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(get_android_dt_dir().c_str()), closedir);
-    if (!dir) return;
-
-    std::string dt_file;
-    struct dirent *dp;
-    while ((dp = readdir(dir.get())) != NULL) {
-        if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible") || !strcmp(dp->d_name, "name")) {
-            continue;
+    ImportKernelCmdline([](const std::string& key, const std::string& value) {
+        if (key == "androidboot.verifiedbootstate") {
+            SetProperty("ro.boot.flash.locked", value == "orange" ? "0" : "1");
         }
-
-        std::string file_name = get_android_dt_dir() + dp->d_name;
-
-        android::base::ReadFileToString(file_name, &dt_file);
-        std::replace(dt_file.begin(), dt_file.end(), ',', '.');
-
-        property_set("ro.boot."s + dp->d_name, dt_file);
-    }
-}
-
-static void process_kernel_cmdline() {
-    // The first pass does the common stuff, and finds if we are in qemu.
-    // The second pass is only necessary for qemu to export all kernel params
-    // as properties.
-    import_kernel_cmdline(false, import_kernel_nv);
-    if (qemu[0]) import_kernel_cmdline(true, import_kernel_nv);
+    });
 }
 
 static Result<void> property_enable_triggers_action(const BuiltinArguments& args) {
@@ -467,7 +397,7 @@
     while ((dp = readdir(dir.get())) != nullptr) {
         if (dp->d_name[0] == '.') continue;
 
-        property_set("sys.usb.controller", dp->d_name);
+        SetProperty("sys.usb.controller", dp->d_name);
         break;
     }
 }
@@ -548,7 +478,7 @@
         PLOG(FATAL) << "failed to create signalfd";
     }
 
-    if (auto result = epoll->RegisterHandler(signal_fd, HandleSignalFd); !result) {
+    if (auto result = epoll->RegisterHandler(signal_fd, HandleSignalFd); !result.ok()) {
         LOG(FATAL) << result.error();
     }
 }
@@ -569,7 +499,7 @@
             found = true;
             LOG(INFO) << "Starting service '" << svc->name() << "' from keychord "
                       << android::base::Join(keycodes, ' ');
-            if (auto result = svc->Start(); !result) {
+            if (auto result = svc->Start(); !result.ok()) {
                 LOG(ERROR) << "Could not start service '" << svc->name() << "' from keychord "
                            << android::base::Join(keycodes, ' ') << ": " << result.error();
             }
@@ -582,15 +512,29 @@
 
 static void UmountDebugRamdisk() {
     if (umount("/debug_ramdisk") != 0) {
-        LOG(ERROR) << "Failed to umount /debug_ramdisk";
+        PLOG(ERROR) << "Failed to umount /debug_ramdisk";
     }
 }
 
+static void MountExtraFilesystems() {
+#define CHECKCALL(x) \
+    if ((x) != 0) PLOG(FATAL) << #x " failed.";
+
+    // /apex is used to mount APEXes
+    CHECKCALL(mount("tmpfs", "/apex", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
+                    "mode=0755,uid=0,gid=0"));
+
+    // /linkerconfig is used to keep generated linker configuration
+    CHECKCALL(mount("tmpfs", "/linkerconfig", "tmpfs", MS_NOEXEC | MS_NOSUID | MS_NODEV,
+                    "mode=0755,uid=0,gid=0"));
+#undef CHECKCALL
+}
+
 static void RecordStageBoottimes(const boot_clock::time_point& second_stage_start_time) {
     int64_t first_stage_start_time_ns = -1;
     if (auto first_stage_start_time_str = getenv(kEnvFirstStageStartedAt);
         first_stage_start_time_str) {
-        property_set("ro.boottime.init", first_stage_start_time_str);
+        SetProperty("ro.boottime.init", first_stage_start_time_str);
         android::base::ParseInt(first_stage_start_time_str, &first_stage_start_time_ns);
     }
     unsetenv(kEnvFirstStageStartedAt);
@@ -604,17 +548,17 @@
     if (selinux_start_time_ns == -1) return;
     if (first_stage_start_time_ns == -1) return;
 
-    property_set("ro.boottime.init.first_stage",
-                 std::to_string(selinux_start_time_ns - first_stage_start_time_ns));
-    property_set("ro.boottime.init.selinux",
-                 std::to_string(second_stage_start_time.time_since_epoch().count() -
-                                selinux_start_time_ns));
+    SetProperty("ro.boottime.init.first_stage",
+                std::to_string(selinux_start_time_ns - first_stage_start_time_ns));
+    SetProperty("ro.boottime.init.selinux",
+                std::to_string(second_stage_start_time.time_since_epoch().count() -
+                               selinux_start_time_ns));
 }
 
 void SendLoadPersistentPropertiesMessage() {
     auto init_message = InitMessage{};
     init_message.set_load_persistent_properties(true);
-    if (auto result = SendMessage(property_fd, init_message); !result) {
+    if (auto result = SendMessage(property_fd, init_message); !result.ok()) {
         LOG(ERROR) << "Failed to send load persistent properties message: " << result.error();
     }
 }
@@ -622,7 +566,7 @@
 void SendStopSendingMessagesMessage() {
     auto init_message = InitMessage{};
     init_message.set_stop_sending_messages(true);
-    if (auto result = SendMessage(property_fd, init_message); !result) {
+    if (auto result = SendMessage(property_fd, init_message); !result.ok()) {
         LOG(ERROR) << "Failed to send 'stop sending messages' message: " << result.error();
     }
 }
@@ -630,14 +574,14 @@
 void SendStartSendingMessagesMessage() {
     auto init_message = InitMessage{};
     init_message.set_start_sending_messages(true);
-    if (auto result = SendMessage(property_fd, init_message); !result) {
+    if (auto result = SendMessage(property_fd, init_message); !result.ok()) {
         LOG(ERROR) << "Failed to send 'start sending messages' message: " << result.error();
     }
 }
 
 static void HandlePropertyFd() {
     auto message = ReadMessage(property_fd);
-    if (!message) {
+    if (!message.ok()) {
         LOG(ERROR) << "Could not read message from property service: " << message.error();
         return;
     }
@@ -680,13 +624,21 @@
 
     boot_clock::time_point start_time = boot_clock::now();
 
+    trigger_shutdown = TriggerShutdown;
+
     SetStdioToDevNull(argv);
     InitKernelLogging(argv);
     LOG(INFO) << "init second stage started!";
 
+    // Will handle EPIPE at the time of write by checking the errno
+    signal(SIGPIPE, SIG_IGN);
+
     // Set init and its forked children's oom_adj.
-    if (auto result = WriteFile("/proc/1/oom_score_adj", "-1000"); !result) {
-        LOG(ERROR) << "Unable to write -1000 to /proc/1/oom_score_adj: " << result.error();
+    if (auto result =
+                WriteFile("/proc/1/oom_score_adj", StringPrintf("%d", DEFAULT_OOM_SCORE_ADJUST));
+        !result.ok()) {
+        LOG(ERROR) << "Unable to write " << DEFAULT_OOM_SCORE_ADJUST
+                   << " to /proc/1/oom_score_adj: " << result.error();
     }
 
     // Set up a session keyring that all processes will have access to. It
@@ -697,56 +649,58 @@
     // Indicate that booting is in progress to background fw loaders, etc.
     close(open("/dev/.booting", O_WRONLY | O_CREAT | O_CLOEXEC, 0000));
 
-    property_init();
-
-    // If arguments are passed both on the command line and in DT,
-    // properties set in DT always have priority over the command-line ones.
-    process_kernel_dt();
-    process_kernel_cmdline();
-
-    // Propagate the kernel variables to internal variables
-    // used by init as well as the current required properties.
-    export_kernel_boot_props();
-
-    // Make the time that init stages started available for bootstat to log.
-    RecordStageBoottimes(start_time);
-
-    // Set libavb version for Framework-only OTA match in Treble build.
-    const char* avb_version = getenv("INIT_AVB_VERSION");
-    if (avb_version) property_set("ro.boot.avb_version", avb_version);
-
     // See if need to load debug props to allow adb root, when the device is unlocked.
     const char* force_debuggable_env = getenv("INIT_FORCE_DEBUGGABLE");
+    bool load_debug_prop = false;
     if (force_debuggable_env && AvbHandle::IsDeviceUnlocked()) {
         load_debug_prop = "true"s == force_debuggable_env;
     }
-
-    // Clean up our environment.
-    unsetenv("INIT_AVB_VERSION");
     unsetenv("INIT_FORCE_DEBUGGABLE");
 
+    // Umount the debug ramdisk so property service doesn't read .prop files from there, when it
+    // is not meant to.
+    if (!load_debug_prop) {
+        UmountDebugRamdisk();
+    }
+
+    PropertyInit();
+
+    // Umount the debug ramdisk after property service has read the .prop files when it means to.
+    if (load_debug_prop) {
+        UmountDebugRamdisk();
+    }
+
+    // Mount extra filesystems required during second stage init
+    MountExtraFilesystems();
+
     // Now set up SELinux for second stage.
     SelinuxSetupKernelLogging();
     SelabelInitialize();
     SelinuxRestoreContext();
 
     Epoll epoll;
-    if (auto result = epoll.Open(); !result) {
+    if (auto result = epoll.Open(); !result.ok()) {
         PLOG(FATAL) << result.error();
     }
 
     InstallSignalFdHandler(&epoll);
 
-    property_load_boot_defaults(load_debug_prop);
-    UmountDebugRamdisk();
-    fs_mgr_vendor_overlay_mount_all();
-    export_oem_lock_status();
-
     StartPropertyService(&property_fd);
-    if (auto result = epoll.RegisterHandler(property_fd, HandlePropertyFd); !result) {
+    if (auto result = epoll.RegisterHandler(property_fd, HandlePropertyFd); !result.ok()) {
         LOG(FATAL) << "Could not register epoll handler for property fd: " << result.error();
     }
 
+    // Make the time that init stages started available for bootstat to log.
+    RecordStageBoottimes(start_time);
+
+    // Set libavb version for Framework-only OTA match in Treble build.
+    if (const char* avb_version = getenv("INIT_AVB_VERSION"); avb_version != nullptr) {
+        SetProperty("ro.boot.avb_version", avb_version);
+    }
+    unsetenv("INIT_AVB_VERSION");
+
+    fs_mgr_vendor_overlay_mount_all();
+    export_oem_lock_status();
     MountHandler mount_handler(&epoll);
     set_usb_controller();
 
@@ -770,14 +724,14 @@
 
     // Make the GSI status available before scripts start running.
     if (android::gsi::IsGsiRunning()) {
-        property_set("ro.gsid.image_running", "1");
+        SetProperty("ro.gsid.image_running", "1");
     } else {
-        property_set("ro.gsid.image_running", "0");
+        SetProperty("ro.gsid.image_running", "0");
     }
 
     am.QueueBuiltinAction(SetupCgroupsAction, "SetupCgroups");
-
     am.QueueBuiltinAction(SetKptrRestrictAction, "SetKptrRestrict");
+    am.QueueBuiltinAction(TestPerfEventSelinuxAction, "TestPerfEventSelinux");
     am.QueueEventTrigger("early-init");
 
     // Queue an action that waits for coldboot done so we know ueventd has set up all of /dev...
@@ -826,24 +780,24 @@
         if (!(waiting_for_prop || Service::is_exec_service_running())) {
             am.ExecuteOneCommand();
         }
-        if (!(waiting_for_prop || Service::is_exec_service_running())) {
-            if (!IsShuttingDown()) {
-                auto next_process_action_time = HandleProcessActions();
+        if (!IsShuttingDown()) {
+            auto next_process_action_time = HandleProcessActions();
 
-                // If there's a process that needs restarting, wake up in time for that.
-                if (next_process_action_time) {
-                    epoll_timeout = std::chrono::ceil<std::chrono::milliseconds>(
-                            *next_process_action_time - boot_clock::now());
-                    if (*epoll_timeout < 0ms) epoll_timeout = 0ms;
-                }
+            // If there's a process that needs restarting, wake up in time for that.
+            if (next_process_action_time) {
+                epoll_timeout = std::chrono::ceil<std::chrono::milliseconds>(
+                        *next_process_action_time - boot_clock::now());
+                if (*epoll_timeout < 0ms) epoll_timeout = 0ms;
             }
+        }
 
+        if (!(waiting_for_prop || Service::is_exec_service_running())) {
             // If there's more work to do, wake up again immediately.
             if (am.HasMoreCommands()) epoll_timeout = 0ms;
         }
 
         auto pending_functions = epoll.Wait(epoll_timeout);
-        if (!pending_functions) {
+        if (!pending_functions.ok()) {
             LOG(ERROR) << pending_functions.error();
         } else if (!pending_functions->empty()) {
             // We always reap children before responding to the other pending functions. This is to
diff --git a/init/init.h b/init/init.h
index d884a94..4bbca6f 100644
--- a/init/init.h
+++ b/init/init.h
@@ -29,9 +29,7 @@
 namespace init {
 
 Parser CreateParser(ActionManager& action_manager, ServiceList& service_list);
-Parser CreateServiceOnlyParser(ServiceList& service_list);
-
-void TriggerShutdown(const std::string& command);
+Parser CreateServiceOnlyParser(ServiceList& service_list, bool from_apex);
 
 bool start_waiting_for_property(const char *name, const char *value);
 
diff --git a/init/init_test.cpp b/init/init_test.cpp
index 9f63e4f..caf3e03 100644
--- a/init/init_test.cpp
+++ b/init/init_test.cpp
@@ -204,9 +204,9 @@
                                "execute 3";
     // clang-format on
     // WriteFile() ensures the right mode is set
-    ASSERT_TRUE(WriteFile(std::string(dir.path) + "/a.rc", dir_a_script));
+    ASSERT_RESULT_OK(WriteFile(std::string(dir.path) + "/a.rc", dir_a_script));
 
-    ASSERT_TRUE(WriteFile(std::string(dir.path) + "/b.rc", "on boot\nexecute 5"));
+    ASSERT_RESULT_OK(WriteFile(std::string(dir.path) + "/b.rc", "on boot\nexecute 5"));
 
     // clang-format off
     std::string start_script = "import " + std::string(first_import.path) + "\n"
diff --git a/init/interface_utils.cpp b/init/interface_utils.cpp
index ddbacd7..1b76bba 100644
--- a/init/interface_utils.cpp
+++ b/init/interface_utils.cpp
@@ -21,7 +21,6 @@
 
 #include <android-base/strings.h>
 #include <hidl-util/FqInstance.h>
-#include <json/json.h>
 
 using android::FqInstance;
 using android::FQName;
@@ -42,37 +41,6 @@
 
 }  // namespace
 
-Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy(
-        const std::string& path) {
-    Json::Value root;
-    Json::Reader reader;
-    std::ifstream stream(path);
-    if (!reader.parse(stream, root)) {
-        return Error() << "Failed to read interface inheritance hierarchy file: " << path << "\n"
-                       << reader.getFormattedErrorMessages();
-    }
-
-    InterfaceInheritanceHierarchyMap result;
-    for (const Json::Value& entry : root) {
-        std::set<FQName> inherited_interfaces;
-        for (const Json::Value& intf : entry["inheritedInterfaces"]) {
-            FQName fqname;
-            if (!fqname.setTo(intf.asString())) {
-                return Error() << "Unable to parse interface '" << intf.asString() << "'";
-            }
-            inherited_interfaces.insert(fqname);
-        }
-        std::string intf_string = entry["interface"].asString();
-        FQName fqname;
-        if (!fqname.setTo(intf_string)) {
-            return Error() << "Unable to parse interface '" << intf_string << "'";
-        }
-        result[fqname] = inherited_interfaces;
-    }
-
-    return result;
-}
-
 Result<void> CheckInterfaceInheritanceHierarchy(const std::set<std::string>& instances,
                                                 const InterfaceInheritanceHierarchyMap& hierarchy) {
     std::set<FQName> interface_fqnames;
diff --git a/init/interface_utils.h b/init/interface_utils.h
index bd0c104..4ca377f 100644
--- a/init/interface_utils.h
+++ b/init/interface_utils.h
@@ -29,9 +29,6 @@
 
 using InterfaceInheritanceHierarchyMap = std::map<android::FQName, std::set<android::FQName>>;
 
-// Reads the HIDL interface inheritance hierarchy JSON file at the given path.
-Result<InterfaceInheritanceHierarchyMap> ReadInterfaceInheritanceHierarchy(const std::string& path);
-
 // For the given set of interfaces / interface instances, checks that each
 // interface's hierarchy of inherited interfaces is also included in the given
 // interface set. Uses the provided hierarchy data.
diff --git a/init/keychords.cpp b/init/keychords.cpp
index 5f2682b..adec383 100644
--- a/init/keychords.cpp
+++ b/init/keychords.cpp
@@ -187,7 +187,7 @@
         LambdaCheck();
     }
     if (auto result = epoll_->RegisterHandler(fd, [this, fd]() { this->LambdaHandler(fd); });
-        !result) {
+        !result.ok()) {
         LOG(WARNING) << "Could not register keychord epoll handler: " << result.error();
         return false;
     }
@@ -272,7 +272,7 @@
     if (inotify_fd_ >= 0) {
         if (auto result =
                     epoll_->RegisterHandler(inotify_fd_, [this]() { this->InotifyHandler(); });
-            !result) {
+            !result.ok()) {
             LOG(WARNING) << "Could not register keychord epoll handler: " << result.error();
         }
     }
diff --git a/init/keychords_test.cpp b/init/keychords_test.cpp
index 6e9b337..8a333a2 100644
--- a/init/keychords_test.cpp
+++ b/init/keychords_test.cpp
@@ -204,7 +204,7 @@
 
 TestFrame::TestFrame(const std::vector<const std::vector<int>>& chords, EventHandler* ev)
     : ev_(ev) {
-    if (!epoll_.Open()) return;
+    if (!epoll_.Open().ok()) return;
     for (const auto& keycodes : chords) keychords_.Register(keycodes);
     keychords_.Start(&epoll_, [this](const std::vector<int>& keycodes) {
         this->keycodes_.emplace_back(keycodes);
@@ -213,7 +213,7 @@
 
 void TestFrame::RelaxForMs(std::chrono::milliseconds wait) {
     auto pending_functions = epoll_.Wait(wait);
-    ASSERT_TRUE(pending_functions) << pending_functions.error();
+    ASSERT_RESULT_OK(pending_functions);
     for (const auto& function : *pending_functions) {
         (*function)();
     }
diff --git a/init/lmkd_service.cpp b/init/lmkd_service.cpp
new file mode 100644
index 0000000..dd1ab4d
--- /dev/null
+++ b/init/lmkd_service.cpp
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "lmkd_service.h"
+
+#include <errno.h>
+
+#include <android-base/logging.h>
+#include <liblmkd_utils.h>
+
+#include "service_list.h"
+
+namespace android {
+namespace init {
+
+enum LmkdRegistrationResult {
+    LMKD_REG_SUCCESS,
+    LMKD_CONN_FAILED,
+    LMKD_REG_FAILED,
+};
+
+static int lmkd_socket = -1;
+
+static LmkdRegistrationResult RegisterProcess(uid_t uid, pid_t pid, int oom_score_adjust) {
+    // connect to lmkd if not already connected
+    if (lmkd_socket < 0) {
+        lmkd_socket = lmkd_connect();
+        if (lmkd_socket < 0) {
+            return LMKD_CONN_FAILED;
+        }
+    }
+
+    // register service with lmkd
+    struct lmk_procprio params;
+    params.pid = pid;
+    params.uid = uid;
+    params.oomadj = oom_score_adjust;
+    params.ptype = PROC_TYPE_SERVICE;
+    if (lmkd_register_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return LMKD_REG_FAILED;
+    }
+
+    return LMKD_REG_SUCCESS;
+}
+
+static bool UnregisterProcess(pid_t pid) {
+    if (lmkd_socket < 0) {
+        // no connection or it was lost, no need to unregister
+        return false;
+    }
+
+    // unregister service
+    struct lmk_procremove params;
+    params.pid = pid;
+    if (lmkd_unregister_proc(lmkd_socket, &params) != 0) {
+        // data transfer failed, reset the connection
+        close(lmkd_socket);
+        lmkd_socket = -1;
+        return false;
+    }
+
+    return true;
+}
+
+static void RegisterServices(pid_t exclude_pid) {
+    for (const auto& service : ServiceList::GetInstance().services()) {
+        auto svc = service.get();
+        if (svc->oom_score_adjust() != DEFAULT_OOM_SCORE_ADJUST) {
+            // skip if process is excluded or not yet forked (pid==0)
+            if (svc->pid() == exclude_pid || svc->pid() == 0) {
+                continue;
+            }
+            if (RegisterProcess(svc->uid(), svc->pid(), svc->oom_score_adjust()) !=
+                LMKD_REG_SUCCESS) {
+                // a failure here resets the connection, will retry during next registration
+                break;
+            }
+        }
+    }
+}
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust) {
+    bool new_connection = lmkd_socket == -1;
+    LmkdRegistrationResult result;
+
+    result = RegisterProcess(uid, pid, oom_score_adjust);
+    if (result == LMKD_REG_FAILED) {
+        // retry one time if connection to lmkd was lost
+        result = RegisterProcess(uid, pid, oom_score_adjust);
+        new_connection = result == LMKD_REG_SUCCESS;
+    }
+    switch (result) {
+        case LMKD_REG_SUCCESS:
+            // register existing services once new connection is established
+            if (new_connection) {
+                RegisterServices(pid);
+            }
+            break;
+        case LMKD_CONN_FAILED:
+            PLOG(ERROR) << "lmkd connection failed when " << name << " process got started";
+            break;
+        case LMKD_REG_FAILED:
+            PLOG(ERROR) << "lmkd failed to register " << name << " process";
+            break;
+    }
+}
+
+void LmkdUnregister(const std::string& name, pid_t pid) {
+    if (!UnregisterProcess(pid)) {
+        PLOG(ERROR) << "lmkd failed to unregister " << name << " process";
+    }
+}
+
+}  // namespace init
+}  // namespace android
diff --git a/init/lmkd_service.h b/init/lmkd_service.h
new file mode 100644
index 0000000..5b51d52
--- /dev/null
+++ b/init/lmkd_service.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <sys/types.h>
+
+#include <string>
+
+namespace android {
+namespace init {
+
+static const int MIN_OOM_SCORE_ADJUST = -1000;
+static const int MAX_OOM_SCORE_ADJUST = 1000;
+// service with default score is unkillable
+static const int DEFAULT_OOM_SCORE_ADJUST = MIN_OOM_SCORE_ADJUST;
+
+#if defined(__ANDROID__)
+
+void LmkdRegister(const std::string& name, uid_t uid, pid_t pid, int oom_score_adjust);
+void LmkdUnregister(const std::string& name, pid_t pid);
+
+#else  // defined(__ANDROID__)
+
+static inline void LmkdRegister(const std::string&, uid_t, pid_t, int) {}
+static inline void LmkdUnregister(const std::string&, pid_t) {}
+
+#endif  // defined(__ANDROID__)
+
+}  // namespace init
+}  // namespace android
diff --git a/init/mount_handler.cpp b/init/mount_handler.cpp
index 791a019..01abba8 100644
--- a/init/mount_handler.cpp
+++ b/init/mount_handler.cpp
@@ -38,7 +38,6 @@
 #include <libdm/dm.h>
 
 #include "epoll.h"
-#include "property_service.h"
 
 namespace android {
 namespace init {
@@ -96,7 +95,7 @@
     // handling, except for clearing non-existent or already clear property.
     // Goal is reduction of empty properties and associated triggers.
     if (value.empty() && android::base::GetProperty(mount_prop, "").empty()) return;
-    property_set(mount_prop, value);
+    android::base::SetProperty(mount_prop, value);
 }
 
 }  // namespace
@@ -117,7 +116,7 @@
     if (!fp_) PLOG(FATAL) << "Could not open /proc/mounts";
     auto result = epoll->RegisterHandler(
             fileno(fp_.get()), [this]() { this->MountHandlerFunction(); }, EPOLLERR | EPOLLPRI);
-    if (!result) LOG(FATAL) << result.error();
+    if (!result.ok()) LOG(FATAL) << result.error();
 }
 
 MountHandler::~MountHandler() {
diff --git a/init/mount_namespace.cpp b/init/mount_namespace.cpp
index 0745148..0749fe3 100644
--- a/init/mount_namespace.cpp
+++ b/init/mount_namespace.cpp
@@ -25,7 +25,9 @@
 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
+#include <android-base/result.h>
 #include <android-base/unique_fd.h>
+#include <apex_manifest.pb.h>
 
 #include "util.h"
 
@@ -33,6 +35,19 @@
 namespace init {
 namespace {
 
+static bool BindMount(const std::string& source, const std::string& mount_point,
+                      bool recursive = false) {
+    unsigned long mountflags = MS_BIND;
+    if (recursive) {
+        mountflags |= MS_REC;
+    }
+    if (mount(source.c_str(), mount_point.c_str(), nullptr, mountflags, nullptr) == -1) {
+        PLOG(ERROR) << "Failed to bind mount " << source;
+        return false;
+    }
+    return true;
+}
+
 static bool MakeShared(const std::string& mount_point, bool recursive = false) {
     unsigned long mountflags = MS_SHARED;
     if (recursive) {
@@ -45,6 +60,18 @@
     return true;
 }
 
+static bool MakeSlave(const std::string& mount_point, bool recursive = false) {
+    unsigned long mountflags = MS_SLAVE;
+    if (recursive) {
+        mountflags |= MS_REC;
+    }
+    if (mount(nullptr, mount_point.c_str(), nullptr, mountflags, nullptr) == -1) {
+        PLOG(ERROR) << "Failed to change propagation type to slave";
+        return false;
+    }
+    return true;
+}
+
 static bool MakePrivate(const std::string& mount_point, bool recursive = false) {
     unsigned long mountflags = MS_PRIVATE;
     if (recursive) {
@@ -79,36 +106,88 @@
     return updatable;
 }
 
+static Result<void> MountDir(const std::string& path, const std::string& mount_path) {
+    if (int ret = mkdir(mount_path.c_str(), 0755); ret != 0 && errno != EEXIST) {
+        return ErrnoError() << "Could not create mount point " << mount_path;
+    }
+    if (mount(path.c_str(), mount_path.c_str(), nullptr, MS_BIND, nullptr) != 0) {
+        return ErrnoError() << "Could not bind mount " << path << " to " << mount_path;
+    }
+    return {};
+}
+
+static Result<std::string> GetApexName(const std::string& apex_dir) {
+    const std::string manifest_path = apex_dir + "/apex_manifest.pb";
+    std::string content;
+    if (!android::base::ReadFileToString(manifest_path, &content)) {
+        return Error() << "Failed to read manifest file: " << manifest_path;
+    }
+    apex::proto::ApexManifest manifest;
+    if (!manifest.ParseFromString(content)) {
+        return Error() << "Can't parse manifest file: " << manifest_path;
+    }
+    return manifest.name();
+}
+
+static Result<void> ActivateFlattenedApexesFrom(const std::string& from_dir,
+                                                const std::string& to_dir) {
+    std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(from_dir.c_str()), closedir);
+    if (!dir) {
+        return {};
+    }
+    dirent* entry;
+    while ((entry = readdir(dir.get())) != nullptr) {
+        if (entry->d_name[0] == '.') continue;
+        if (entry->d_type == DT_DIR) {
+            const std::string apex_path = from_dir + "/" + entry->d_name;
+            const auto apex_name = GetApexName(apex_path);
+            if (!apex_name.ok()) {
+                LOG(ERROR) << apex_path << " is not an APEX directory: " << apex_name.error();
+                continue;
+            }
+            const std::string mount_path = to_dir + "/" + (*apex_name);
+            if (auto result = MountDir(apex_path, mount_path); !result.ok()) {
+                return result;
+            }
+        }
+    }
+    return {};
+}
+
 static bool ActivateFlattenedApexesIfPossible() {
     if (IsRecoveryMode() || IsApexUpdatable()) {
         return true;
     }
 
-    constexpr const char kSystemApex[] = "/system/apex";
-    constexpr const char kApexTop[] = "/apex";
-    if (mount(kSystemApex, kApexTop, nullptr, MS_BIND, nullptr) != 0) {
-        PLOG(ERROR) << "Could not bind mount " << kSystemApex << " to " << kApexTop;
-        return false;
-    }
+    const std::string kApexTop = "/apex";
+    const std::vector<std::string> kBuiltinDirsForApexes = {
+            "/system/apex",
+            "/system_ext/apex",
+            "/product/apex",
+            "/vendor/apex",
+    };
 
-    // Special casing for the ART APEX
-    constexpr const char kArtApexMountPath[] = "/system/apex/com.android.art";
-    static const std::vector<std::string> kArtApexDirNames = {"com.android.art.release",
-                                                              "com.android.art.debug"};
-    bool success = false;
-    for (const auto& name : kArtApexDirNames) {
-        std::string path = std::string(kSystemApex) + "/" + name;
-        if (access(path.c_str(), F_OK) == 0) {
-            if (mount(path.c_str(), kArtApexMountPath, nullptr, MS_BIND, nullptr) == 0) {
-                success = true;
-                break;
-            }
+    for (const auto& dir : kBuiltinDirsForApexes) {
+        if (auto result = ActivateFlattenedApexesFrom(dir, kApexTop); !result.ok()) {
+            LOG(ERROR) << result.error();
+            return false;
         }
     }
-    if (!success) {
-        PLOG(ERROR) << "Failed to bind mount the ART APEX to " << kArtApexMountPath;
+    return true;
+}
+
+static Result<void> MountLinkerConfigForDefaultNamespace() {
+    // No need to mount linkerconfig for default mount namespace if the path does not exist (which
+    // would mean it is already mounted)
+    if (access("/linkerconfig/default", 0) != 0) {
+        return {};
     }
-    return success;
+
+    if (mount("/linkerconfig/default", "/linkerconfig", nullptr, MS_BIND | MS_REC, nullptr) != 0) {
+        return ErrnoError() << "Failed to mount linker configuration for default mount namespace.";
+    }
+
+    return {};
 }
 
 static android::base::unique_fd bootstrap_ns_fd;
@@ -132,6 +211,44 @@
     // the bootstrap namespace get APEXes from the read-only partition.
     if (!(MakePrivate("/apex"))) return false;
 
+    // /linkerconfig is a private mountpoint to give a different linker configuration
+    // based on the mount namespace. Subdirectory will be bind-mounted based on current mount
+    // namespace
+    if (!(MakePrivate("/linkerconfig"))) return false;
+
+    // The two mount namespaces present challenges for scoped storage, because
+    // vold, which is responsible for most of the mounting, lives in the
+    // bootstrap mount namespace, whereas most other daemons and all apps live
+    // in the default namespace.  Scoped storage has a need for a
+    // /mnt/installer view that is a slave bind mount of /mnt/user - in other
+    // words, all mounts under /mnt/user should automatically show up under
+    // /mnt/installer. However, additional mounts done under /mnt/installer
+    // should not propagate back to /mnt/user. In a single mount namespace
+    // this is easy to achieve, by simply marking the /mnt/installer a slave
+    // bind mount. Unfortunately, if /mnt/installer is only created and
+    // bind mounted after the two namespaces are created below, we end up
+    // with the following situation:
+    // /mnt/user and /mnt/installer share the same peer group in both the
+    // bootstrap and default namespaces. Marking /mnt/installer slave in either
+    // namespace means that it won't propagate events to the /mnt/installer in
+    // the other namespace, which is still something we require - vold is the
+    // one doing the mounting under /mnt/installer, and those mounts should
+    // show up in the default namespace as well.
+    //
+    // The simplest solution is to do the bind mount before the two namespaces
+    // are created: the effect is that in both namespaces, /mnt/installer is a
+    // slave to the /mnt/user mount, and at the same time /mnt/installer in the
+    // bootstrap namespace shares a peer group with /mnt/installer in the
+    // default namespace.
+    if (!mkdir_recursive("/mnt/user", 0755)) return false;
+    if (!mkdir_recursive("/mnt/installer", 0755)) return false;
+    if (!(BindMount("/mnt/user", "/mnt/installer", true))) return false;
+    // First, make /mnt/installer a slave bind mount
+    if (!(MakeSlave("/mnt/installer"))) return false;
+    // Then, make it shared again - effectively creating a new peer group, that
+    // will be inherited by new mount namespaces.
+    if (!(MakeShared("/mnt/installer"))) return false;
+
     bootstrap_ns_fd.reset(OpenMountNamespace());
     bootstrap_ns_id = GetMountNamespaceId();
 
@@ -177,6 +294,11 @@
             PLOG(ERROR) << "Failed to switch back to the default mount namespace.";
             return false;
         }
+
+        if (auto result = MountLinkerConfigForDefaultNamespace(); !result.ok()) {
+            LOG(ERROR) << result.error();
+            return false;
+        }
     }
 
     LOG(INFO) << "Switched to default mount namespace";
diff --git a/init/parser.cpp b/init/parser.cpp
index 6ab61cb..507ee4a 100644
--- a/init/parser.cpp
+++ b/init/parser.cpp
@@ -61,7 +61,7 @@
         bad_section_found = false;
         if (section_parser == nullptr) return;
 
-        if (auto result = section_parser->EndSection(); !result) {
+        if (auto result = section_parser->EndSection(); !result.ok()) {
             parse_error_count_++;
             LOG(ERROR) << filename << ": " << section_start_line << ": " << result.error();
         }
@@ -92,7 +92,7 @@
                 if (line_callback != line_callbacks_.end()) {
                     end_section();
 
-                    if (auto result = line_callback->second(std::move(args)); !result) {
+                    if (auto result = line_callback->second(std::move(args)); !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
@@ -101,8 +101,8 @@
                     section_parser = section_parsers_[args[0]].get();
                     section_start_line = state.line;
                     if (auto result =
-                            section_parser->ParseSection(std::move(args), filename, state.line);
-                        !result) {
+                                section_parser->ParseSection(std::move(args), filename, state.line);
+                        !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                         section_parser = nullptr;
@@ -110,7 +110,7 @@
                     }
                 } else if (section_parser) {
                     if (auto result = section_parser->ParseLineSection(std::move(args), state.line);
-                        !result) {
+                        !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
@@ -143,7 +143,7 @@
     LOG(INFO) << "Parsing file " << path << "...";
     android::base::Timer t;
     auto config_contents = ReadFile(path);
-    if (!config_contents) {
+    if (!config_contents.ok()) {
         LOG(INFO) << "Unable to read config file '" << path << "': " << config_contents.error();
         return false;
     }
diff --git a/init/persistent_properties.cpp b/init/persistent_properties.cpp
index baa9ad4..716f62e 100644
--- a/init/persistent_properties.cpp
+++ b/init/persistent_properties.cpp
@@ -31,10 +31,11 @@
 
 #include "util.h"
 
+using android::base::Dirname;
 using android::base::ReadFdToString;
 using android::base::StartsWith;
-using android::base::WriteStringToFd;
 using android::base::unique_fd;
+using android::base::WriteStringToFd;
 
 namespace android {
 namespace init {
@@ -148,7 +149,7 @@
         unlink(temp_filename.c_str());
     }
     auto file_contents = ReadFile(persistent_property_filename);
-    if (!file_contents) {
+    if (!file_contents.ok()) {
         return Error() << "Unable to read persistent property file: " << file_contents.error();
     }
     return *file_contents;
@@ -158,7 +159,7 @@
 
 Result<PersistentProperties> LoadPersistentPropertyFile() {
     auto file_contents = ReadPersistentPropertyFile();
-    if (!file_contents) return file_contents.error();
+    if (!file_contents.ok()) return file_contents.error();
 
     PersistentProperties persistent_properties;
     if (persistent_properties.ParseFromString(*file_contents)) return persistent_properties;
@@ -191,6 +192,18 @@
         unlink(temp_filename.c_str());
         return Error(saved_errno) << "Unable to rename persistent property file";
     }
+
+    // rename() is atomic with regards to the kernel's filesystem buffers, but the parent
+    // directories must be fsync()'ed otherwise, the rename is not necessarily written to storage.
+    // Note in this case, that the source and destination directories are the same, so only one
+    // fsync() is required.
+    auto dir = Dirname(persistent_property_filename);
+    auto dir_fd = unique_fd{open(dir.c_str(), O_DIRECTORY | O_RDONLY | O_CLOEXEC)};
+    if (dir_fd < 0) {
+        return ErrnoError() << "Unable to open persistent properties directory for fsync()";
+    }
+    fsync(dir_fd);
+
     return {};
 }
 
@@ -199,7 +212,7 @@
 void WritePersistentProperty(const std::string& name, const std::string& value) {
     auto persistent_properties = LoadPersistentPropertyFile();
 
-    if (!persistent_properties) {
+    if (!persistent_properties.ok()) {
         LOG(ERROR) << "Recovering persistent properties from memory: "
                    << persistent_properties.error();
         persistent_properties = LoadPersistentPropertiesFromMemory();
@@ -214,7 +227,7 @@
         AddPersistentProperty(name, value, &persistent_properties.value());
     }
 
-    if (auto result = WritePersistentPropertyFile(*persistent_properties); !result) {
+    if (auto result = WritePersistentPropertyFile(*persistent_properties); !result.ok()) {
         LOG(ERROR) << "Could not store persistent property: " << result.error();
     }
 }
@@ -222,16 +235,16 @@
 PersistentProperties LoadPersistentProperties() {
     auto persistent_properties = LoadPersistentPropertyFile();
 
-    if (!persistent_properties) {
+    if (!persistent_properties.ok()) {
         LOG(ERROR) << "Could not load single persistent property file, trying legacy directory: "
                    << persistent_properties.error();
         persistent_properties = LoadLegacyPersistentProperties();
-        if (!persistent_properties) {
+        if (!persistent_properties.ok()) {
             LOG(ERROR) << "Unable to load legacy persistent properties: "
                        << persistent_properties.error();
             return {};
         }
-        if (auto result = WritePersistentPropertyFile(*persistent_properties); result) {
+        if (auto result = WritePersistentPropertyFile(*persistent_properties); result.ok()) {
             RemoveLegacyPersistentPropertyFiles();
         } else {
             LOG(ERROR) << "Unable to write single persistent property file: " << result.error();
diff --git a/init/persistent_properties_test.cpp b/init/persistent_properties_test.cpp
index 13796a6..60cecde 100644
--- a/init/persistent_properties_test.cpp
+++ b/init/persistent_properties_test.cpp
@@ -83,7 +83,8 @@
         {"persist.\x00\x01\x02\xFF\xFE\xFD\x7F\x8F\x9F", "non-ascii-name"},
     };
 
-    ASSERT_TRUE(WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
+    ASSERT_RESULT_OK(
+            WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
 
     auto read_back_properties = LoadPersistentProperties();
     CheckPropertiesEqual(persistent_properties, read_back_properties);
@@ -97,7 +98,8 @@
     std::vector<std::pair<std::string, std::string>> persistent_properties = {
         {"persist.sys.timezone", "America/Los_Angeles"},
     };
-    ASSERT_TRUE(WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
+    ASSERT_RESULT_OK(
+            WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
 
     WritePersistentProperty("persist.sys.locale", "pt-BR");
 
@@ -119,7 +121,8 @@
         {"persist.sys.locale", "en-US"},
         {"persist.sys.timezone", "America/Los_Angeles"},
     };
-    ASSERT_TRUE(WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
+    ASSERT_RESULT_OK(
+            WritePersistentPropertyFile(VectorToPersistentProperties(persistent_properties)));
 
     WritePersistentProperty("persist.sys.locale", "pt-BR");
 
@@ -137,7 +140,7 @@
     ASSERT_TRUE(tf.fd != -1);
     persistent_property_filename = tf.path;
 
-    ASSERT_TRUE(WriteFile(tf.path, "ab"));
+    ASSERT_RESULT_OK(WriteFile(tf.path, "ab"));
 
     WritePersistentProperty("persist.sys.locale", "pt-BR");
 
diff --git a/init/property_service.cpp b/init/property_service.cpp
index c6bbc14..84644e8 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -97,8 +97,6 @@
 
 static PropertyInfoAreaFile property_info_area;
 
-void CreateSerializedPropertyInfo();
-
 struct PropertyAuditData {
     const ucred* cr;
     const char* name;
@@ -117,21 +115,6 @@
     return 0;
 }
 
-void property_init() {
-    selinux_callback cb;
-    cb.func_audit = PropertyAuditCallback;
-    selinux_set_callback(SELINUX_CB_AUDIT, cb);
-
-    mkdir("/dev/__properties__", S_IRWXU | S_IXGRP | S_IXOTH);
-    CreateSerializedPropertyInfo();
-    if (__system_property_area_init()) {
-        LOG(FATAL) << "Failed to initialize property area";
-    }
-    if (!property_info_area.LoadDefaultPath()) {
-        LOG(FATAL) << "Failed to load serialized property info file";
-    }
-}
-
 bool CanReadProperty(const std::string& source_context, const std::string& name) {
     const char* target_context = nullptr;
     property_info_area->GetPropertyInfo(name.c_str(), &target_context, nullptr);
@@ -170,7 +153,7 @@
     changed_message->set_name(name);
     changed_message->set_value(value);
 
-    if (auto result = SendMessage(init_socket, property_msg); !result) {
+    if (auto result = SendMessage(init_socket, property_msg); !result.ok()) {
         LOG(ERROR) << "Failed to send property changed message: " << result.error();
     }
 }
@@ -183,7 +166,7 @@
         return PROP_ERROR_INVALID_NAME;
     }
 
-    if (auto result = IsLegalPropertyValue(name, value); !result) {
+    if (auto result = IsLegalPropertyValue(name, value); !result.ok()) {
         *error = result.error().message();
         return PROP_ERROR_INVALID_VALUE;
     }
@@ -404,12 +387,12 @@
     // We must release the fd before sending it to init, otherwise there will be a race with init.
     // If init calls close() before Release(), then fdsan will see the wrong tag and abort().
     int fd = -1;
-    if (socket != nullptr) {
+    if (socket != nullptr && SelinuxGetVendorAndroidVersion() > __ANDROID_API_Q__) {
         fd = socket->Release();
         control_message->set_fd(fd);
     }
 
-    if (auto result = SendMessage(init_socket, property_msg); !result) {
+    if (auto result = SendMessage(init_socket, property_msg); !result.ok()) {
         // We've already released the fd above, so if we fail to send the message to init, we need
         // to manually free it here.
         if (fd != -1) {
@@ -478,7 +461,7 @@
         return PROP_ERROR_PERMISSION_DENIED;
     }
 
-    if (type == nullptr || !CheckType(type, value)) {
+    if (!CheckType(type, value)) {
         *error = StringPrintf("Property type check failed, value doesn't match expected type '%s'",
                               (type ?: "(null)"));
         return PROP_ERROR_INVALID_VALUE;
@@ -527,20 +510,6 @@
     return PropertySet(name, value, error);
 }
 
-uint32_t InitPropertySet(const std::string& name, const std::string& value) {
-    uint32_t result = 0;
-    ucred cr = {.pid = 1, .uid = 0, .gid = 0};
-    std::string error;
-    result = HandlePropertySet(name, value, kInitContext, cr, nullptr, &error);
-    if (result != PROP_SUCCESS) {
-        LOG(ERROR) << "Init cannot set '" << name << "' to '" << value << "': " << error;
-    }
-
-    return result;
-}
-
-uint32_t (*property_set)(const std::string& name, const std::string& value) = InitPropertySet;
-
 static void handle_property_set_fd() {
     static constexpr uint32_t kDefaultSocketTimeout = 2000; /* ms */
 
@@ -634,6 +603,18 @@
     }
 }
 
+uint32_t InitPropertySet(const std::string& name, const std::string& value) {
+    uint32_t result = 0;
+    ucred cr = {.pid = 1, .uid = 0, .gid = 0};
+    std::string error;
+    result = HandlePropertySet(name, value, kInitContext, cr, nullptr, &error);
+    if (result != PROP_SUCCESS) {
+        LOG(ERROR) << "Init cannot set '" << name << "' to '" << value << "': " << error;
+    }
+
+    return result;
+}
+
 static bool load_properties_from_file(const char*, const char*,
                                       std::map<std::string, std::string>*);
 
@@ -689,7 +670,7 @@
             std::string raw_filename(fn);
             auto expanded_filename = ExpandProps(raw_filename);
 
-            if (!expanded_filename) {
+            if (!expanded_filename.ok()) {
                 LOG(ERROR) << "Could not expand filename ': " << expanded_filename.error();
                 continue;
             }
@@ -745,7 +726,7 @@
                                       std::map<std::string, std::string>* properties) {
     Timer t;
     auto file_contents = ReadFile(filename);
-    if (!file_contents) {
+    if (!file_contents.ok()) {
         PLOG(WARNING) << "Couldn't load property file '" << filename
                       << "': " << file_contents.error();
         return false;
@@ -765,11 +746,11 @@
     bool is_debuggable = android::base::GetBoolProperty("ro.debuggable", false);
     std::string config = android::base::GetProperty("persist.sys.usb.config", "");
     if (config.empty()) {
-        property_set("persist.sys.usb.config", is_debuggable ? "adb" : "none");
+        InitPropertySet("persist.sys.usb.config", is_debuggable ? "adb" : "none");
     } else if (is_debuggable && config.find("adb") == std::string::npos &&
                config.length() + 4 < PROP_VALUE_MAX) {
         config.append(",adb");
-        property_set("persist.sys.usb.config", config);
+        InitPropertySet("persist.sys.usb.config", config);
     }
 }
 
@@ -890,7 +871,7 @@
     }
 }
 
-void property_load_boot_defaults(bool load_debug_prop) {
+void PropertyLoadBootDefaults() {
     // TODO(b/117892318): merge prop.default and build.prop files into one
     // We read the properties and their values into a map, in order to always allow properties
     // loaded in the later property files to override the properties in loaded in the earlier
@@ -916,7 +897,7 @@
     load_properties_from_file("/product/build.prop", nullptr, &properties);
     load_properties_from_file("/factory/factory.prop", "ro.*", &properties);
 
-    if (load_debug_prop) {
+    if (access(kDebugRamdiskProp, R_OK) == 0) {
         LOG(INFO) << "Loading " << kDebugRamdiskProp;
         load_properties_from_file(kDebugRamdiskProp, nullptr, &properties);
     }
@@ -944,7 +925,8 @@
     }
 
     auto errors = std::vector<std::string>{};
-    ParsePropertyInfoFile(file_contents, property_infos, &errors);
+    bool require_prefix_or_exact = SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__;
+    ParsePropertyInfoFile(file_contents, require_prefix_or_exact, property_infos, &errors);
     // Individual parsing errors are reported but do not cause a failed boot, which is what
     // returning false would do here.
     for (const auto& error : errors) {
@@ -1009,9 +991,100 @@
     selinux_android_restorecon(kPropertyInfosPath, 0);
 }
 
+static void ExportKernelBootProps() {
+    constexpr const char* UNSET = "";
+    struct {
+        const char* src_prop;
+        const char* dst_prop;
+        const char* default_value;
+    } prop_map[] = {
+            // clang-format off
+        { "ro.boot.serialno",   "ro.serialno",   UNSET, },
+        { "ro.boot.mode",       "ro.bootmode",   "unknown", },
+        { "ro.boot.baseband",   "ro.baseband",   "unknown", },
+        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
+        { "ro.boot.hardware",   "ro.hardware",   "unknown", },
+        { "ro.boot.revision",   "ro.revision",   "0", },
+            // clang-format on
+    };
+    for (const auto& prop : prop_map) {
+        std::string value = GetProperty(prop.src_prop, prop.default_value);
+        if (value != UNSET) InitPropertySet(prop.dst_prop, value);
+    }
+}
+
+static void ProcessKernelDt() {
+    if (!is_android_dt_value_expected("compatible", "android,firmware")) {
+        return;
+    }
+
+    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(get_android_dt_dir().c_str()), closedir);
+    if (!dir) return;
+
+    std::string dt_file;
+    struct dirent* dp;
+    while ((dp = readdir(dir.get())) != NULL) {
+        if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible") ||
+            !strcmp(dp->d_name, "name")) {
+            continue;
+        }
+
+        std::string file_name = get_android_dt_dir() + dp->d_name;
+
+        android::base::ReadFileToString(file_name, &dt_file);
+        std::replace(dt_file.begin(), dt_file.end(), ',', '.');
+
+        InitPropertySet("ro.boot."s + dp->d_name, dt_file);
+    }
+}
+
+static void ProcessKernelCmdline() {
+    bool for_emulator = false;
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "qemu") {
+            for_emulator = true;
+        } else if (StartsWith(key, "androidboot.")) {
+            InitPropertySet("ro.boot." + key.substr(12), value);
+        }
+    });
+
+    if (for_emulator) {
+        ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+            // In the emulator, export any kernel option with the "ro.kernel." prefix.
+            InitPropertySet("ro.kernel." + key, value);
+        });
+    }
+}
+
+void PropertyInit() {
+    selinux_callback cb;
+    cb.func_audit = PropertyAuditCallback;
+    selinux_set_callback(SELINUX_CB_AUDIT, cb);
+
+    mkdir("/dev/__properties__", S_IRWXU | S_IXGRP | S_IXOTH);
+    CreateSerializedPropertyInfo();
+    if (__system_property_area_init()) {
+        LOG(FATAL) << "Failed to initialize property area";
+    }
+    if (!property_info_area.LoadDefaultPath()) {
+        LOG(FATAL) << "Failed to load serialized property info file";
+    }
+
+    // If arguments are passed both on the command line and in DT,
+    // properties set in DT always have priority over the command-line ones.
+    ProcessKernelDt();
+    ProcessKernelCmdline();
+
+    // Propagate the kernel variables to internal variables
+    // used by init as well as the current required properties.
+    ExportKernelBootProps();
+
+    PropertyLoadBootDefaults();
+}
+
 static void HandleInitSocket() {
     auto message = ReadMessage(init_socket);
-    if (!message) {
+    if (!message.ok()) {
         LOG(ERROR) << "Could not read message from init_dedicated_recv_socket: " << message.error();
         return;
     }
@@ -1050,21 +1123,22 @@
 
 static void PropertyServiceThread() {
     Epoll epoll;
-    if (auto result = epoll.Open(); !result) {
+    if (auto result = epoll.Open(); !result.ok()) {
         LOG(FATAL) << result.error();
     }
 
-    if (auto result = epoll.RegisterHandler(property_set_fd, handle_property_set_fd); !result) {
+    if (auto result = epoll.RegisterHandler(property_set_fd, handle_property_set_fd);
+        !result.ok()) {
         LOG(FATAL) << result.error();
     }
 
-    if (auto result = epoll.RegisterHandler(init_socket, HandleInitSocket); !result) {
+    if (auto result = epoll.RegisterHandler(init_socket, HandleInitSocket); !result.ok()) {
         LOG(FATAL) << result.error();
     }
 
     while (true) {
         auto pending_functions = epoll.Wait(std::nullopt);
-        if (!pending_functions) {
+        if (!pending_functions.ok()) {
             LOG(ERROR) << pending_functions.error();
         } else {
             for (const auto& function : *pending_functions) {
@@ -1075,7 +1149,7 @@
 }
 
 void StartPropertyService(int* epoll_socket) {
-    property_set("ro.property_service.version", "2");
+    InitPropertySet("ro.property_service.version", "2");
 
     int sockets[2];
     if (socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC, 0, sockets) != 0) {
@@ -1086,7 +1160,8 @@
     accept_messages = true;
 
     if (auto result = CreateSocket(PROP_SERVICE_NAME, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
-                                   false, 0666, 0, 0, {})) {
+                                   false, 0666, 0, 0, {});
+        result.ok()) {
         property_set_fd = *result;
     } else {
         LOG(FATAL) << "start_property_service socket creation failed: " << result.error();
@@ -1095,11 +1170,6 @@
     listen(property_set_fd, 8);
 
     std::thread{PropertyServiceThread}.detach();
-
-    property_set = [](const std::string& key, const std::string& value) -> uint32_t {
-        android::base::SetProperty(key, value);
-        return 0;
-    };
 }
 
 }  // namespace init
diff --git a/init/property_service.h b/init/property_service.h
index 8f7d8d9..506d116 100644
--- a/init/property_service.h
+++ b/init/property_service.h
@@ -29,10 +29,7 @@
 
 bool CanReadProperty(const std::string& source_context, const std::string& name);
 
-extern uint32_t (*property_set)(const std::string& name, const std::string& value);
-
-void property_init();
-void property_load_boot_defaults(bool load_debug_prop);
+void PropertyInit();
 void StartPropertyService(int* epoll_socket);
 
 }  // namespace init
diff --git a/init/reboot.cpp b/init/reboot.cpp
index d77b975..38e8227 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -38,6 +38,7 @@
 #include <thread>
 #include <vector>
 
+#include <InitProperties.sysprop.h>
 #include <android-base/chrono_utils.h>
 #include <android-base/file.h>
 #include <android-base/logging.h>
@@ -57,7 +58,7 @@
 #include "action_manager.h"
 #include "builtin_arguments.h"
 #include "init.h"
-#include "property_service.h"
+#include "mount_namespace.h"
 #include "reboot_utils.h"
 #include "service.h"
 #include "service_list.h"
@@ -68,10 +69,13 @@
 
 using namespace std::literals;
 
+using android::base::boot_clock;
 using android::base::GetBoolProperty;
+using android::base::SetProperty;
 using android::base::Split;
 using android::base::Timer;
 using android::base::unique_fd;
+using android::base::WaitForProperty;
 using android::base::WriteStringToFile;
 
 namespace android {
@@ -176,15 +180,22 @@
         LOG(WARNING) << "cannot find blank_screen in TurnOffBacklight";
         return;
     }
-    if (auto result = service->Start(); !result) {
+    if (auto result = service->Start(); !result.ok()) {
         LOG(WARNING) << "Could not start blank_screen service: " << result.error();
     }
 }
 
-static void ShutdownVold() {
-    const char* vdc_argv[] = {"/system/bin/vdc", "volume", "shutdown"};
+static Result<void> CallVdc(const std::string& system, const std::string& cmd) {
+    const char* vdc_argv[] = {"/system/bin/vdc", system.c_str(), cmd.c_str()};
     int status;
-    logwrap_fork_execvp(arraysize(vdc_argv), vdc_argv, &status, false, LOG_KLOG, true, nullptr);
+    if (logwrap_fork_execvp(arraysize(vdc_argv), vdc_argv, &status, false, LOG_KLOG, true,
+                            nullptr) != 0) {
+        return ErrnoError() << "Failed to call '/system/bin/vdc " << system << " " << cmd << "'";
+    }
+    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+        return {};
+    }
+    return Error() << "'/system/bin/vdc " << system << " " << cmd << "' failed : " << status;
 }
 
 static void LogShutdownTime(UmountStat stat, Timer* t) {
@@ -209,8 +220,8 @@
 
 // Find all read+write block devices and emulated devices in /proc/mounts and add them to
 // the correpsponding list.
-static bool FindPartitionsToUmount(std::vector<MountEntry>* blockDevPartitions,
-                                   std::vector<MountEntry>* emulatedPartitions, bool dump) {
+static bool FindPartitionsToUmount(std::vector<MountEntry>* block_dev_partitions,
+                                   std::vector<MountEntry>* emulated_partitions, bool dump) {
     std::unique_ptr<std::FILE, int (*)(std::FILE*)> fp(setmntent("/proc/mounts", "re"), endmntent);
     if (fp == nullptr) {
         PLOG(ERROR) << "Failed to open /proc/mounts";
@@ -227,10 +238,10 @@
             // Do not umount them as shutdown critical services may rely on them.
             if (mount_dir != "/" && mount_dir != "/system" && mount_dir != "/vendor" &&
                 mount_dir != "/oem") {
-                blockDevPartitions->emplace(blockDevPartitions->begin(), *mentry);
+                block_dev_partitions->emplace(block_dev_partitions->begin(), *mentry);
             }
         } else if (MountEntry::IsEmulatedDevice(*mentry)) {
-            emulatedPartitions->emplace(emulatedPartitions->begin(), *mentry);
+            emulated_partitions->emplace(emulated_partitions->begin(), *mentry);
         }
     }
     return true;
@@ -292,8 +303,9 @@
 }
 
 // Create reboot/shutdwon monitor thread
-void RebootMonitorThread(unsigned int cmd, const std::string& rebootTarget, sem_t* reboot_semaphore,
-                         std::chrono::milliseconds shutdown_timeout, bool* reboot_monitor_run) {
+void RebootMonitorThread(unsigned int cmd, const std::string& reboot_target,
+                         sem_t* reboot_semaphore, std::chrono::milliseconds shutdown_timeout,
+                         bool* reboot_monitor_run) {
     unsigned int remaining_shutdown_time = 0;
 
     // 30 seconds more than the timeout passed to the thread as there is a final Umount pass
@@ -355,7 +367,7 @@
 
                 WriteStringToFile("u", PROC_SYSRQ);
 
-                RebootSystem(cmd, rebootTarget);
+                RebootSystem(cmd, reboot_target);
             }
 
             LOG(ERROR) << "Trigger crash at last!";
@@ -385,13 +397,13 @@
  *
  * return true when umount was successful. false when timed out.
  */
-static UmountStat TryUmountAndFsck(unsigned int cmd, const std::string& rebootTarget, bool runFsck,
+static UmountStat TryUmountAndFsck(unsigned int cmd, bool run_fsck,
                                    std::chrono::milliseconds timeout, sem_t* reboot_semaphore) {
     Timer t;
     std::vector<MountEntry> block_devices;
     std::vector<MountEntry> emulated_devices;
 
-    if (runFsck && !FindPartitionsToUmount(&block_devices, &emulated_devices, false)) {
+    if (run_fsck && !FindPartitionsToUmount(&block_devices, &emulated_devices, false)) {
         return UMOUNT_STAT_ERROR;
     }
 
@@ -405,7 +417,7 @@
         if ((st != UMOUNT_STAT_SUCCESS) && DUMP_ON_UMOUNT_FAILURE) DumpUmountDebuggingInfo();
     }
 
-    if (stat == UMOUNT_STAT_SUCCESS && runFsck) {
+    if (stat == UMOUNT_STAT_SUCCESS && run_fsck) {
         LOG(INFO) << "Pause reboot monitor thread before fsck";
         sem_post(reboot_semaphore);
 
@@ -426,11 +438,11 @@
 #define ZRAM_DEVICE   "/dev/block/zram0"
 #define ZRAM_RESET    "/sys/block/zram0/reset"
 #define ZRAM_BACK_DEV "/sys/block/zram0/backing_dev"
-static void KillZramBackingDevice() {
+static Result<void> KillZramBackingDevice() {
     std::string backing_dev;
-    if (!android::base::ReadFileToString(ZRAM_BACK_DEV, &backing_dev)) return;
+    if (!android::base::ReadFileToString(ZRAM_BACK_DEV, &backing_dev)) return {};
 
-    if (!android::base::StartsWith(backing_dev, "/dev/block/loop")) return;
+    if (!android::base::StartsWith(backing_dev, "/dev/block/loop")) return {};
 
     // cut the last "\n"
     backing_dev.erase(backing_dev.length() - 1);
@@ -439,28 +451,29 @@
     Timer swap_timer;
     LOG(INFO) << "swapoff() start...";
     if (swapoff(ZRAM_DEVICE) == -1) {
-        LOG(ERROR) << "zram_backing_dev: swapoff (" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: swapoff (" << backing_dev << ")"
+                            << " failed";
     }
     LOG(INFO) << "swapoff() took " << swap_timer;;
 
     if (!WriteStringToFile("1", ZRAM_RESET)) {
-        LOG(ERROR) << "zram_backing_dev: reset (" << backing_dev << ")" << " failed";
-        return;
+        return Error() << "zram_backing_dev: reset (" << backing_dev << ")"
+                       << " failed";
     }
 
     // clear loopback device
     unique_fd loop(TEMP_FAILURE_RETRY(open(backing_dev.c_str(), O_RDWR | O_CLOEXEC)));
     if (loop.get() < 0) {
-        LOG(ERROR) << "zram_backing_dev: open(" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: open(" << backing_dev << ")"
+                            << " failed";
     }
 
     if (ioctl(loop.get(), LOOP_CLR_FD, 0) < 0) {
-        LOG(ERROR) << "zram_backing_dev: loop_clear (" << backing_dev << ")" << " failed";
-        return;
+        return ErrnoError() << "zram_backing_dev: loop_clear (" << backing_dev << ")"
+                            << " failed";
     }
     LOG(INFO) << "zram_backing_dev: `" << backing_dev << "` is cleared successfully.";
+    return {};
 }
 
 // Stops given services, waits for them to be stopped for |timeout| ms.
@@ -509,20 +522,19 @@
 //* Reboot / shutdown the system.
 // cmd ANDROID_RB_* as defined in android_reboot.h
 // reason Reason string like "reboot", "shutdown,userrequested"
-// rebootTarget Reboot target string like "bootloader". Otherwise, it should be an
-//              empty string.
-// runFsck Whether to run fsck after umount is done.
+// reboot_target Reboot target string like "bootloader". Otherwise, it should be an empty string.
+// run_fsck Whether to run fsck after umount is done.
 //
-static void DoReboot(unsigned int cmd, const std::string& reason, const std::string& rebootTarget,
-                     bool runFsck) {
+static void DoReboot(unsigned int cmd, const std::string& reason, const std::string& reboot_target,
+                     bool run_fsck) {
     Timer t;
-    LOG(INFO) << "Reboot start, reason: " << reason << ", rebootTarget: " << rebootTarget;
+    LOG(INFO) << "Reboot start, reason: " << reason << ", reboot_target: " << reboot_target;
 
     // If /data isn't mounted then we can skip the extra reboot steps below, since we don't need to
     // worry about unmounting it.
     if (!IsDataMounted()) {
         sync();
-        RebootSystem(cmd, rebootTarget);
+        RebootSystem(cmd, reboot_target);
         abort();
     }
 
@@ -535,7 +547,7 @@
          reasons[1] == "hard" || reasons[1] == "warm")) {
         skip = strlen("reboot,");
     }
-    property_set(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
+    SetProperty(LAST_REBOOT_REASON_PROPERTY, reason.c_str() + skip);
     sync();
 
     bool is_thermal_shutdown = cmd == ANDROID_RB_THERMOFF;
@@ -557,13 +569,13 @@
     if (sem_init(&reboot_semaphore, false, 0) == -1) {
         // These should never fail, but if they do, skip the graceful reboot and reboot immediately.
         LOG(ERROR) << "sem_init() fail and RebootSystem() return!";
-        RebootSystem(cmd, rebootTarget);
+        RebootSystem(cmd, reboot_target);
     }
 
     // Start a thread to monitor init shutdown process
     LOG(INFO) << "Create reboot monitor thread.";
     bool reboot_monitor_run = true;
-    std::thread reboot_monitor_thread(&RebootMonitorThread, cmd, rebootTarget, &reboot_semaphore,
+    std::thread reboot_monitor_thread(&RebootMonitorThread, cmd, reboot_target, &reboot_semaphore,
                                       shutdown_timeout, &reboot_monitor_run);
     reboot_monitor_thread.detach();
 
@@ -579,14 +591,14 @@
             // keep debugging tools until non critical ones are all gone.
             s->SetShutdownCritical();
         } else if (to_starts.count(s->name())) {
-            if (auto result = s->Start(); !result) {
+            if (auto result = s->Start(); !result.ok()) {
                 LOG(ERROR) << "Could not start shutdown 'to_start' service '" << s->name()
                            << "': " << result.error();
             }
             s->SetShutdownCritical();
         } else if (s->IsShutdownCritical()) {
             // Start shutdown critical service if not started.
-            if (auto result = s->Start(); !result) {
+            if (auto result = s->Start(); !result.ok()) {
                 LOG(ERROR) << "Could not start shutdown critical service '" << s->name()
                            << "': " << result.error();
             }
@@ -600,16 +612,16 @@
         TurnOffBacklight();
     }
 
-    Service* bootAnim = ServiceList::GetInstance().FindService("bootanim");
-    Service* surfaceFlinger = ServiceList::GetInstance().FindService("surfaceflinger");
-    if (bootAnim != nullptr && surfaceFlinger != nullptr && surfaceFlinger->IsRunning()) {
+    Service* boot_anim = ServiceList::GetInstance().FindService("bootanim");
+    Service* surface_flinger = ServiceList::GetInstance().FindService("surfaceflinger");
+    if (boot_anim != nullptr && surface_flinger != nullptr && surface_flinger->IsRunning()) {
         bool do_shutdown_animation = GetBoolProperty("ro.init.shutdown_animation", false);
 
         if (do_shutdown_animation) {
-            property_set("service.bootanim.exit", "0");
+            SetProperty("service.bootanim.exit", "0");
             // Could be in the middle of animation. Stop and start so that it can pick
             // up the right mode.
-            bootAnim->Stop();
+            boot_anim->Stop();
         }
 
         for (const auto& service : ServiceList::GetInstance()) {
@@ -625,9 +637,9 @@
         }
 
         if (do_shutdown_animation) {
-            bootAnim->Start();
-            surfaceFlinger->SetShutdownCritical();
-            bootAnim->SetShutdownCritical();
+            boot_anim->Start();
+            surface_flinger->SetShutdownCritical();
+            boot_anim->SetShutdownCritical();
         }
     }
 
@@ -643,10 +655,10 @@
     ReapAnyOutstandingChildren();
 
     // 3. send volume shutdown to vold
-    Service* voldService = ServiceList::GetInstance().FindService("vold");
-    if (voldService != nullptr && voldService->IsRunning()) {
-        ShutdownVold();
-        voldService->Stop();
+    Service* vold_service = ServiceList::GetInstance().FindService("vold");
+    if (vold_service != nullptr && vold_service->IsRunning()) {
+        CallVdc("volume", "shutdown");
+        vold_service->Stop();
     } else {
         LOG(INFO) << "vold not running, skipping vold shutdown";
     }
@@ -662,8 +674,8 @@
     // 5. drop caches and disable zram backing device, if exist
     KillZramBackingDevice();
 
-    UmountStat stat = TryUmountAndFsck(cmd, rebootTarget, runFsck, shutdown_timeout - t.duration(),
-                                       &reboot_semaphore);
+    UmountStat stat =
+            TryUmountAndFsck(cmd, run_fsck, shutdown_timeout - t.duration(), &reboot_semaphore);
     // Follow what linux shutdown is doing: one more sync with little bit delay
     {
         Timer sync_timer;
@@ -679,7 +691,7 @@
     sem_post(&reboot_semaphore);
 
     // Reboot regardless of umount status. If umount fails, fsck after reboot will fix it.
-    RebootSystem(cmd, rebootTarget);
+    RebootSystem(cmd, reboot_target);
     abort();
 }
 
@@ -705,19 +717,36 @@
     SendStartSendingMessagesMessage();
 }
 
+static Result<void> UnmountAllApexes() {
+    const char* args[] = {"/system/bin/apexd", "--unmount-all"};
+    int status;
+    if (logwrap_fork_execvp(arraysize(args), args, &status, false, LOG_KLOG, true, nullptr) != 0) {
+        return ErrnoError() << "Failed to call '/system/bin/apexd --unmount-all'";
+    }
+    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
+        return {};
+    }
+    return Error() << "'/system/bin/apexd --unmount-all' failed : " << status;
+}
+
 static Result<void> DoUserspaceReboot() {
     LOG(INFO) << "Userspace reboot initiated";
     auto guard = android::base::make_scope_guard([] {
         // Leave shutdown so that we can handle a full reboot.
         LeaveShutdown();
-        TriggerShutdown("reboot,abort-userspace-reboot");
+        trigger_shutdown("reboot,userspace_failed,shutdown_aborted");
     });
-    // Triggering userspace-reboot-requested will result in a bunch of set_prop
+    // Triggering userspace-reboot-requested will result in a bunch of setprop
     // actions. We should make sure, that all of them are propagated before
-    // proceeding with userspace reboot.
-    // TODO(b/135984674): implement proper synchronization logic.
-    std::this_thread::sleep_for(500ms);
+    // proceeding with userspace reboot. Synchronously setting sys.init.userspace_reboot.in_progress
+    // property is not perfect, but it should do the trick.
+    if (!android::sysprop::InitProperties::userspace_reboot_in_progress(true)) {
+        return Error() << "Failed to set sys.init.userspace_reboot.in_progress property";
+    }
     EnterShutdown();
+    if (!SetProperty("sys.powerctl", "")) {
+        return Error() << "Failed to reset sys.powerctl property";
+    }
     std::vector<Service*> stop_first;
     // Remember the services that were enabled. We will need to manually enable them again otherwise
     // triggers like class_start won't restart them.
@@ -731,6 +760,12 @@
             were_enabled.push_back(s);
         }
     }
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() before terminating services...";
+        sync();
+        LOG(INFO) << "sync() took " << sync_timer;
+    }
     // TODO(b/135984674): do we need shutdown animation for userspace reboot?
     // TODO(b/135984674): control userspace timeout via read-only property?
     StopServicesAndLogViolations(stop_first, 10s, true /* SIGTERM */);
@@ -738,14 +773,38 @@
         // TODO(b/135984674): store information about offending services for debugging.
         return Error() << r << " post-data services are still running";
     }
-    // TODO(b/135984674): remount userdata
+    if (auto result = KillZramBackingDevice(); !result.ok()) {
+        return result;
+    }
+    if (auto result = CallVdc("volume", "reset"); !result.ok()) {
+        return result;
+    }
     if (int r = StopServicesAndLogViolations(GetDebuggingServices(true /* only_post_data */), 5s,
                                              false /* SIGKILL */);
         r > 0) {
         // TODO(b/135984674): store information about offending services for debugging.
         return Error() << r << " debugging services are still running";
     }
-    // TODO(b/135984674): deactivate APEX modules and switch back to bootstrap namespace.
+    {
+        Timer sync_timer;
+        LOG(INFO) << "sync() after stopping services...";
+        sync();
+        LOG(INFO) << "sync() took " << sync_timer;
+    }
+    if (auto result = UnmountAllApexes(); !result.ok()) {
+        return result;
+    }
+    if (!SwitchToBootstrapMountNamespaceIfNeeded()) {
+        return Error() << "Failed to switch to bootstrap namespace";
+    }
+    // Remove services that were defined in an APEX.
+    ServiceList::GetInstance().RemoveServiceIf([](const std::unique_ptr<Service>& s) -> bool {
+        if (s->is_from_apex()) {
+            LOG(INFO) << "Removing service '" << s->name() << "' because it's defined in an APEX";
+            return true;
+        }
+        return false;
+    });
     // Re-enable services
     for (const auto& s : were_enabled) {
         LOG(INFO) << "Re-enabling service '" << s->name() << "'";
@@ -757,7 +816,42 @@
     return {};
 }
 
+static void UserspaceRebootWatchdogThread() {
+    if (!WaitForProperty("sys.init.userspace_reboot.in_progress", "1", 20s)) {
+        // TODO(b/135984674): should we reboot instead?
+        LOG(WARNING) << "Userspace reboot didn't start in 20 seconds. Stopping watchdog";
+        return;
+    }
+    LOG(INFO) << "Starting userspace reboot watchdog";
+    // TODO(b/135984674): this should be configured via a read-only sysprop.
+    std::chrono::milliseconds timeout = 60s;
+    if (!WaitForProperty("sys.boot_completed", "1", timeout)) {
+        LOG(ERROR) << "Failed to boot in " << timeout.count() << "ms. Switching to full reboot";
+        // In this case device is in a boot loop. Only way to recover is to do dirty reboot.
+        RebootSystem(ANDROID_RB_RESTART2, "userspace_failed,watchdog_triggered");
+    }
+    LOG(INFO) << "Device booted, stopping userspace reboot watchdog";
+}
+
 static void HandleUserspaceReboot() {
+    if (!android::sysprop::InitProperties::is_userspace_reboot_supported().value_or(false)) {
+        LOG(ERROR) << "Attempted a userspace reboot on a device that doesn't support it";
+        return;
+    }
+    // Spinnig up a separate thread will fail the setns call later in the boot sequence.
+    // Fork a new process to monitor userspace reboot while we are investigating a better solution.
+    pid_t pid = fork();
+    if (pid < 0) {
+        PLOG(ERROR) << "Failed to fork process for userspace reboot watchdog. Switching to full "
+                    << "reboot";
+        trigger_shutdown("reboot,userspace_failed,watchdog_fork");
+        return;
+    }
+    if (pid == 0) {
+        // Child
+        UserspaceRebootWatchdogThread();
+        _exit(EXIT_SUCCESS);
+    }
     LOG(INFO) << "Clearing queue and starting userspace-reboot-requested trigger";
     auto& am = ActionManager::GetInstance();
     am.ClearQueue();
@@ -766,6 +860,30 @@
     am.QueueBuiltinAction(handler, "userspace-reboot");
 }
 
+/**
+ * Check if "command" field is set in bootloader message.
+ *
+ * If "command" field is broken (contains non-printable characters prior to
+ * terminating zero), it will be zeroed.
+ *
+ * @param[in,out] boot Bootloader message (BCB) structure
+ * @return true if "command" field is already set, and false if it's empty
+ */
+static bool CommandIsPresent(bootloader_message* boot) {
+    if (boot->command[0] == '\0')
+        return false;
+
+    for (size_t i = 0; i < arraysize(boot->command); ++i) {
+        if (boot->command[i] == '\0')
+            return true;
+        if (!isprint(boot->command[i]))
+            break;
+    }
+
+    memset(boot->command, 0, sizeof(boot->command));
+    return false;
+}
+
 void HandlePowerctlMessage(const std::string& command) {
     unsigned int cmd = 0;
     std::vector<std::string> cmd_params = Split(command, ",");
@@ -818,7 +936,7 @@
                 }
                 // Update the boot command field if it's empty, and preserve
                 // the other arguments in the bootloader message.
-                if (boot.command[0] == '\0') {
+                if (!CommandIsPresent(&boot)) {
                     strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
                     if (std::string err; !write_bootloader_message(boot, &err)) {
                         LOG(ERROR) << "Failed to set bootloader message: " << err;
diff --git a/init/reboot_utils.cpp b/init/reboot_utils.cpp
index dac0cf4..485188b 100644
--- a/init/reboot_utils.cpp
+++ b/init/reboot_utils.cpp
@@ -34,12 +34,16 @@
 namespace init {
 
 static std::string init_fatal_reboot_target = "bootloader";
+static bool init_fatal_panic = false;
 
 void SetFatalRebootTarget() {
     std::string cmdline;
     android::base::ReadFileToString("/proc/cmdline", &cmdline);
     cmdline = android::base::Trim(cmdline);
 
+    const char kInitFatalPanicString[] = "androidboot.init_fatal_panic=true";
+    init_fatal_panic = cmdline.find(kInitFatalPanicString) != std::string::npos;
+
     const char kRebootTargetString[] = "androidboot.init_fatal_reboot_target=";
     auto start_pos = cmdline.find(kRebootTargetString);
     if (start_pos == std::string::npos) {
@@ -133,6 +137,9 @@
     for (size_t i = 0; i < backtrace->NumFrames(); i++) {
         LOG(ERROR) << backtrace->FormatFrameData(i);
     }
+    if (init_fatal_panic) {
+        _exit(signal_number);
+    }
     RebootSystem(ANDROID_RB_RESTART2, init_fatal_reboot_target);
 }
 
diff --git a/init/result.h b/init/result.h
index b70dd1b..8c1f91e 100644
--- a/init/result.h
+++ b/init/result.h
@@ -22,8 +22,6 @@
 #include <android-base/result.h>
 
 using android::base::ErrnoError;
-using android::base::ErrnoErrorf;
 using android::base::Error;
-using android::base::Errorf;
 using android::base::Result;
 using android::base::ResultError;
diff --git a/init/rlimit_parser_test.cpp b/init/rlimit_parser_test.cpp
index 6a16d3b..3c3f848 100644
--- a/init/rlimit_parser_test.cpp
+++ b/init/rlimit_parser_test.cpp
@@ -29,7 +29,7 @@
     ASSERT_EQ(4U, input.size());
     auto result = ParseRlimit(input);
 
-    ASSERT_TRUE(result) << "input: " << input[1];
+    ASSERT_TRUE(result.ok()) << "input: " << input[1];
     const auto& [resource, rlimit] = *result;
     const auto& [expected_resource, expected_rlimit] = expected_result;
     EXPECT_EQ(expected_resource, resource);
@@ -42,7 +42,7 @@
     ASSERT_EQ(4U, input.size());
     auto result = ParseRlimit(input);
 
-    ASSERT_FALSE(result) << "input: " << input[1];
+    ASSERT_FALSE(result.ok()) << "input: " << input[1];
     EXPECT_EQ(expected_result, result.error().message());
     EXPECT_EQ(0, result.error().code());
 }
diff --git a/init/security.cpp b/init/security.cpp
index 586d0c7..6cbe642 100644
--- a/init/security.cpp
+++ b/init/security.cpp
@@ -18,14 +18,19 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <linux/perf_event.h>
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
 #include <unistd.h>
 
 #include <fstream>
 
 #include <android-base/logging.h>
+#include <android-base/properties.h>
 #include <android-base/unique_fd.h>
 
 using android::base::unique_fd;
+using android::base::SetProperty;
 
 namespace android {
 namespace init {
@@ -197,5 +202,61 @@
     return {};
 }
 
+// Test for whether the kernel has SELinux hooks for the perf_event_open()
+// syscall. If the hooks are present, we can stop using the other permission
+// mechanism (perf_event_paranoid sysctl), and use only the SELinux policy to
+// control access to the syscall. The hooks are expected on all Android R
+// release kernels, but might be absent on devices that upgrade while keeping an
+// older kernel.
+//
+// There is no direct/synchronous way of finding out that a syscall failed due
+// to SELinux. Therefore we test for a combination of a success and a failure
+// that are explained by the platform's SELinux policy for the "init" domain:
+// * cpu-scoped perf_event is allowed
+// * ioctl() on the event fd is disallowed with EACCES
+//
+// Since init has CAP_SYS_ADMIN, these tests are not affected by the system-wide
+// perf_event_paranoid sysctl.
+//
+// If the SELinux hooks are detected, a special sysprop
+// (sys.init.perf_lsm_hooks) is set, which translates to a modification of
+// perf_event_paranoid (through init.rc sysprop actions).
+//
+// TODO(b/137092007): this entire test can be removed once the platform stops
+// supporting kernels that precede the perf_event_open hooks (Android common
+// kernels 4.4 and 4.9).
+Result<void> TestPerfEventSelinuxAction(const BuiltinArguments&) {
+    // Use a trivial event that will be configured, but not started.
+    struct perf_event_attr pe = {
+            .type = PERF_TYPE_SOFTWARE,
+            .size = sizeof(struct perf_event_attr),
+            .config = PERF_COUNT_SW_TASK_CLOCK,
+            .disabled = 1,
+            .exclude_kernel = 1,
+    };
+
+    // Open the above event targeting cpu 0. (EINTR not possible.)
+    unique_fd fd(static_cast<int>(syscall(__NR_perf_event_open, &pe, /*pid=*/-1,
+                                          /*cpu=*/0,
+                                          /*group_fd=*/-1, /*flags=*/0)));
+    if (fd == -1) {
+        PLOG(ERROR) << "Unexpected perf_event_open error";
+        return {};
+    }
+
+    int ioctl_ret = ioctl(fd, PERF_EVENT_IOC_RESET);
+    if (ioctl_ret != -1) {
+        // Success implies that the kernel doesn't have the hooks.
+        return {};
+    } else if (errno != EACCES) {
+        PLOG(ERROR) << "Unexpected perf_event ioctl error";
+        return {};
+    }
+
+    // Conclude that the SELinux hooks are present.
+    SetProperty("sys.init.perf_lsm_hooks", "1");
+    return {};
+}
+
 }  // namespace init
 }  // namespace android
diff --git a/init/security.h b/init/security.h
index b081a05..43c2739 100644
--- a/init/security.h
+++ b/init/security.h
@@ -29,6 +29,7 @@
 Result<void> MixHwrngIntoLinuxRngAction(const BuiltinArguments&);
 Result<void> SetMmapRndBitsAction(const BuiltinArguments&);
 Result<void> SetKptrRestrictAction(const BuiltinArguments&);
+Result<void> TestPerfEventSelinuxAction(const BuiltinArguments&);
 
 }  // namespace init
 }  // namespace android
diff --git a/init/selinux.cpp b/init/selinux.cpp
index a15d136..41007c1 100644
--- a/init/selinux.cpp
+++ b/init/selinux.cpp
@@ -88,12 +88,11 @@
 EnforcingStatus StatusFromCmdline() {
     EnforcingStatus status = SELINUX_ENFORCING;
 
-    import_kernel_cmdline(false,
-                          [&](const std::string& key, const std::string& value, bool in_qemu) {
-                              if (key == "androidboot.selinux" && value == "permissive") {
-                                  status = SELINUX_PERMISSIVE;
-                              }
-                          });
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "androidboot.selinux" && value == "permissive") {
+            status = SELINUX_PERMISSIVE;
+        }
+    });
 
     return status;
 }
@@ -478,7 +477,7 @@
         }
     }
 
-    if (auto result = WriteFile("/sys/fs/selinux/checkreqprot", "0"); !result) {
+    if (auto result = WriteFile("/sys/fs/selinux/checkreqprot", "0"); !result.ok()) {
         LOG(FATAL) << "Unable to write to /sys/fs/selinux/checkreqprot: " << result.error();
     }
 }
@@ -514,9 +513,6 @@
 
 }  // namespace
 
-// The files and directories that were created before initial sepolicy load or
-// files on ramdisk need to have their security context restored to the proper
-// value. This must happen before /dev is populated by ueventd.
 void SelinuxRestoreContext() {
     LOG(INFO) << "Running restorecon...";
     selinux_android_restorecon("/dev", 0);
@@ -535,6 +531,8 @@
     selinux_android_restorecon("/dev/device-mapper", 0);
 
     selinux_android_restorecon("/apex", 0);
+
+    selinux_android_restorecon("/linkerconfig", 0);
 }
 
 int SelinuxKlogCallback(int type, const char* fmt, ...) {
@@ -560,15 +558,12 @@
     return 0;
 }
 
-// This function sets up SELinux logging to be written to kmsg, to match init's logging.
 void SelinuxSetupKernelLogging() {
     selinux_callback cb;
     cb.func_log = SelinuxKlogCallback;
     selinux_set_callback(SELINUX_CB_LOG, cb);
 }
 
-// This function returns the Android version with which the vendor SEPolicy was compiled.
-// It is used for version checks such as whether or not vendor_init should be used
 int SelinuxGetVendorAndroidVersion() {
     static int vendor_android_version = [] {
         if (!IsSplitPolicyDevice()) {
@@ -594,7 +589,6 @@
     return vendor_android_version;
 }
 
-// This function initializes SELinux then execs init to run in the init SELinux context.
 int SetupSelinux(char** argv) {
     SetStdioToDevNull(argv);
     InitKernelLogging(argv);
diff --git a/init/selinux.h b/init/selinux.h
index 63ad470..1a41bfd 100644
--- a/init/selinux.h
+++ b/init/selinux.h
@@ -19,10 +19,19 @@
 namespace android {
 namespace init {
 
+// Initialize SELinux, then exec init to run in the init SELinux context.
 int SetupSelinux(char** argv);
+
+// Restore the proper security context to files and directories on ramdisk, and
+// those that were created before initial sepolicy load.
+// This must happen before /dev is populated by ueventd.
 void SelinuxRestoreContext();
 
+// Set up SELinux logging to be written to kmsg, to match init's logging.
 void SelinuxSetupKernelLogging();
+
+// Return the Android API level with which the vendor SEPolicy was compiled.
+// Used for version checks such as whether or not vendor_init should be used.
 int SelinuxGetVendorAndroidVersion();
 
 static constexpr char kEnvSelinuxStartedAt[] = "SELINUX_STARTED_AT";
diff --git a/init/service.cpp b/init/service.cpp
index c8568a0..665a1b0 100644
--- a/init/service.cpp
+++ b/init/service.cpp
@@ -36,15 +36,16 @@
 #include <processgroup/processgroup.h>
 #include <selinux/selinux.h>
 
+#include "lmkd_service.h"
 #include "service_list.h"
 #include "util.h"
 
 #if defined(__ANDROID__)
 #include <ApexProperties.sysprop.h>
+#include <android/api-level.h>
 
-#include "init.h"
 #include "mount_namespace.h"
-#include "property_service.h"
+#include "selinux.h"
 #else
 #include "host_init_stubs.h"
 #endif
@@ -53,6 +54,7 @@
 using android::base::GetProperty;
 using android::base::Join;
 using android::base::make_scope_guard;
+using android::base::SetProperty;
 using android::base::StartsWith;
 using android::base::StringPrintf;
 using android::base::WriteStringToFile;
@@ -104,7 +106,7 @@
     c_strings.push_back(const_cast<char*>(args[0].data()));
     for (std::size_t i = 1; i < args.size(); ++i) {
         auto expanded_arg = ExpandProps(args[i]);
-        if (!expanded_arg) {
+        if (!expanded_arg.ok()) {
             LOG(FATAL) << args[0] << ": cannot expand arguments': " << expanded_arg.error();
         }
         expanded_args[i] = *expanded_arg;
@@ -129,13 +131,13 @@
 bool Service::is_exec_service_running_ = false;
 
 Service::Service(const std::string& name, Subcontext* subcontext_for_restart_commands,
-                 const std::vector<std::string>& args)
-    : Service(name, 0, 0, 0, {}, 0, "", subcontext_for_restart_commands, args) {}
+                 const std::vector<std::string>& args, bool from_apex)
+    : Service(name, 0, 0, 0, {}, 0, "", subcontext_for_restart_commands, args, from_apex) {}
 
 Service::Service(const std::string& name, unsigned flags, uid_t uid, gid_t gid,
                  const std::vector<gid_t>& supp_gids, int namespace_flags,
                  const std::string& seclabel, Subcontext* subcontext_for_restart_commands,
-                 const std::vector<std::string>& args)
+                 const std::vector<std::string>& args, bool from_apex)
     : name_(name),
       classnames_({"default"}),
       flags_(flags),
@@ -151,9 +153,10 @@
       seclabel_(seclabel),
       onrestart_(false, subcontext_for_restart_commands, "<Service '" + name + "' onrestart>", 0,
                  "onrestart", {}),
-      oom_score_adjust_(-1000),
+      oom_score_adjust_(DEFAULT_OOM_SCORE_ADJUST),
       start_order_(0),
-      args_(args) {}
+      args_(args),
+      from_apex_(from_apex) {}
 
 void Service::NotifyStateChange(const std::string& new_state) const {
     if ((flags_ & SVC_TEMPORARY) != 0) {
@@ -162,13 +165,13 @@
     }
 
     std::string prop_name = "init.svc." + name_;
-    property_set(prop_name, new_state);
+    SetProperty(prop_name, new_state);
 
     if (new_state == "running") {
         uint64_t start_ns = time_started_.time_since_epoch().count();
         std::string boottime_property = "ro.boottime." + name_;
         if (GetProperty(boottime_property, "").empty()) {
-            property_set(boottime_property, std::to_string(start_ns));
+            SetProperty(boottime_property, std::to_string(start_ns));
         }
     }
 
@@ -176,13 +179,13 @@
     // on device for security checks.
     std::string pid_property = "init.svc_debug_pid." + name_;
     if (new_state == "running") {
-        property_set(pid_property, std::to_string(pid_));
+        SetProperty(pid_property, std::to_string(pid_));
     } else if (new_state == "stopped") {
-        property_set(pid_property, "");
+        SetProperty(pid_property, "");
     }
 }
 
-void Service::KillProcessGroup(int signal) {
+void Service::KillProcessGroup(int signal, bool report_oneshot) {
     // If we've already seen a successful result from killProcessGroup*(), then we have removed
     // the cgroup already and calling these functions a second time will simply result in an error.
     // This is true regardless of which signal was sent.
@@ -190,15 +193,28 @@
     if (!process_cgroup_empty_) {
         LOG(INFO) << "Sending signal " << signal << " to service '" << name_ << "' (pid " << pid_
                   << ") process group...";
+        int max_processes = 0;
         int r;
         if (signal == SIGTERM) {
-            r = killProcessGroupOnce(proc_attr_.uid, pid_, signal);
+            r = killProcessGroupOnce(proc_attr_.uid, pid_, signal, &max_processes);
         } else {
-            r = killProcessGroup(proc_attr_.uid, pid_, signal);
+            r = killProcessGroup(proc_attr_.uid, pid_, signal, &max_processes);
+        }
+
+        if (report_oneshot && max_processes > 0) {
+            LOG(WARNING)
+                    << "Killed " << max_processes
+                    << " additional processes from a oneshot process group for service '" << name_
+                    << "'. This is new behavior, previously child processes would not be killed in "
+                       "this case.";
         }
 
         if (r == 0) process_cgroup_empty_ = true;
     }
+
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdUnregister(name_, pid_);
+    }
 }
 
 void Service::SetProcessAttributesAndCaps() {
@@ -216,7 +232,7 @@
         }
     }
 
-    if (auto result = SetProcessAttributes(proc_attr_); !result) {
+    if (auto result = SetProcessAttributes(proc_attr_); !result.ok()) {
         LOG(FATAL) << "cannot set attribute for " << name_ << ": " << result.error();
     }
 
@@ -240,7 +256,16 @@
 
 void Service::Reap(const siginfo_t& siginfo) {
     if (!(flags_ & SVC_ONESHOT) || (flags_ & SVC_RESTART)) {
-        KillProcessGroup(SIGKILL);
+        KillProcessGroup(SIGKILL, false);
+    } else {
+        // Legacy behavior from ~2007 until Android R: this else branch did not exist and we did not
+        // kill the process group in this case.
+        if (SelinuxGetVendorAndroidVersion() >= __ANDROID_API_R__) {
+            // The new behavior in Android R is to kill these process groups in all cases.  The
+            // 'true' parameter instructions KillProcessGroup() to report a warning message where it
+            // detects a difference in behavior has occurred.
+            KillProcessGroup(SIGKILL, true);
+        }
     }
 
     // Remove any socket resources we may have created.
@@ -255,7 +280,7 @@
 
     if ((siginfo.si_code != CLD_EXITED || siginfo.si_status != 0) && on_failure_reboot_target_) {
         LOG(ERROR) << "Service with 'reboot_on_failure' option failed, shutting down system.";
-        TriggerShutdown(*on_failure_reboot_target_);
+        trigger_shutdown(*on_failure_reboot_target_);
     }
 
     if (flags_ & SVC_EXEC) UnSetExec();
@@ -300,7 +325,8 @@
                     LOG(ERROR) << "updatable process '" << name_ << "' exited 4 times "
                                << (boot_completed ? "in 4 minutes" : "before boot completed");
                     // Notifies update_verifier and apexd
-                    property_set("sys.init.updatable_crashing", "1");
+                    SetProperty("sys.init.updatable_crashing_process_name", name_);
+                    SetProperty("sys.init.updatable_crashing", "1");
                 }
             }
         } else {
@@ -335,7 +361,7 @@
 Result<void> Service::ExecStart() {
     auto reboot_on_failure = make_scope_guard([this] {
         if (on_failure_reboot_target_) {
-            TriggerShutdown(*on_failure_reboot_target_);
+            trigger_shutdown(*on_failure_reboot_target_);
         }
     });
 
@@ -348,7 +374,7 @@
 
     flags_ |= SVC_ONESHOT;
 
-    if (auto result = Start(); !result) {
+    if (auto result = Start(); !result.ok()) {
         return result;
     }
 
@@ -366,7 +392,7 @@
 Result<void> Service::Start() {
     auto reboot_on_failure = make_scope_guard([this] {
         if (on_failure_reboot_target_) {
-            TriggerShutdown(*on_failure_reboot_target_);
+            trigger_shutdown(*on_failure_reboot_target_);
         }
     });
 
@@ -423,7 +449,7 @@
         scon = seclabel_;
     } else {
         auto result = ComputeContextFromExecutable(args_[0]);
-        if (!result) {
+        if (!result.ok()) {
             return result.error();
         }
         scon = *result;
@@ -443,7 +469,7 @@
 
     std::vector<Descriptor> descriptors;
     for (const auto& socket : sockets_) {
-        if (auto result = socket.Create(scon)) {
+        if (auto result = socket.Create(scon); result.ok()) {
             descriptors.emplace_back(std::move(*result));
         } else {
             LOG(INFO) << "Could not create socket '" << socket.name << "': " << result.error();
@@ -451,7 +477,7 @@
     }
 
     for (const auto& file : files_) {
-        if (auto result = file.Create()) {
+        if (auto result = file.Create(); result.ok()) {
             descriptors.emplace_back(std::move(*result));
         } else {
             LOG(INFO) << "Could not open file '" << file.name << "': " << result.error();
@@ -468,7 +494,7 @@
     if (pid == 0) {
         umask(077);
 
-        if (auto result = EnterNamespaces(namespaces_, name_, pre_apexd_); !result) {
+        if (auto result = EnterNamespaces(namespaces_, name_, pre_apexd_); !result.ok()) {
             LOG(FATAL) << "Service '" << name_
                        << "' failed to set up namespaces: " << result.error();
         }
@@ -481,7 +507,7 @@
             descriptor.Publish();
         }
 
-        if (auto result = WritePidToFiles(&writepid_files_); !result) {
+        if (auto result = WritePidToFiles(&writepid_files_); !result.ok()) {
             LOG(ERROR) << "failed to write pid to files: " << result.error();
         }
 
@@ -502,7 +528,7 @@
         return ErrnoError() << "Failed to fork";
     }
 
-    if (oom_score_adjust_ != -1000) {
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
         std::string oom_str = std::to_string(oom_score_adjust_);
         std::string oom_file = StringPrintf("/proc/%d/oom_score_adj", pid);
         if (!WriteStringToFile(oom_str, oom_file)) {
@@ -563,6 +589,10 @@
         }
     }
 
+    if (oom_score_adjust_ != DEFAULT_OOM_SCORE_ADJUST) {
+        LmkdRegister(name_, proc_attr_.uid, pid_, oom_score_adjust_);
+    }
+
     NotifyStateChange("running");
     reboot_on_failure.Disable();
     return {};
@@ -639,7 +669,7 @@
         StopOrReset(SVC_RESTART);
     } else if (!(flags_ & SVC_RESTARTING)) {
         /* Just start the service since it's not running. */
-        if (auto result = Start(); !result) {
+        if (auto result = Start(); !result.ok()) {
             LOG(ERROR) << "Could not restart '" << name_ << "': " << result.error();
         }
     } /* else: Service is restarting anyways. */
@@ -712,7 +742,7 @@
     Result<uid_t> uid = 0;
     if (command_arg > 3) {
         uid = DecodeUid(args[2]);
-        if (!uid) {
+        if (!uid.ok()) {
             return Error() << "Unable to decode UID for '" << args[2] << "': " << uid.error();
         }
     }
@@ -720,13 +750,13 @@
     std::vector<gid_t> supp_gids;
     if (command_arg > 4) {
         gid = DecodeUid(args[3]);
-        if (!gid) {
+        if (!gid.ok()) {
             return Error() << "Unable to decode GID for '" << args[3] << "': " << gid.error();
         }
         std::size_t nr_supp_gids = command_arg - 1 /* -- */ - 4 /* exec SECLABEL UID GID */;
         for (size_t i = 0; i < nr_supp_gids; ++i) {
             auto supp_gid = DecodeUid(args[4 + i]);
-            if (!supp_gid) {
+            if (!supp_gid.ok()) {
                 return Error() << "Unable to decode GID for '" << args[4 + i]
                                << "': " << supp_gid.error();
             }
@@ -735,7 +765,7 @@
     }
 
     return std::make_unique<Service>(name, flags, *uid, *gid, supp_gids, namespace_flags, seclabel,
-                                     nullptr, str_args);
+                                     nullptr, str_args, false);
 }
 
 }  // namespace init
diff --git a/init/service.h b/init/service.h
index 272c9f9..cf3f0c2 100644
--- a/init/service.h
+++ b/init/service.h
@@ -65,11 +65,12 @@
 
   public:
     Service(const std::string& name, Subcontext* subcontext_for_restart_commands,
-            const std::vector<std::string>& args);
+            const std::vector<std::string>& args, bool from_apex = false);
 
     Service(const std::string& name, unsigned flags, uid_t uid, gid_t gid,
             const std::vector<gid_t>& supp_gids, int namespace_flags, const std::string& seclabel,
-            Subcontext* subcontext_for_restart_commands, const std::vector<std::string>& args);
+            Subcontext* subcontext_for_restart_commands, const std::vector<std::string>& args,
+            bool from_apex = false);
 
     static Result<std::unique_ptr<Service>> MakeTemporaryOneshotService(
             const std::vector<std::string>& args);
@@ -128,11 +129,12 @@
     const std::vector<std::string>& args() const { return args_; }
     bool is_updatable() const { return updatable_; }
     bool is_post_data() const { return post_data_; }
+    bool is_from_apex() const { return from_apex_; }
 
   private:
     void NotifyStateChange(const std::string& new_state) const;
     void StopOrReset(int how);
-    void KillProcessGroup(int signal);
+    void KillProcessGroup(int signal, bool report_oneshot = false);
     void SetProcessAttributesAndCaps();
 
     static unsigned long next_start_order_;
@@ -199,6 +201,8 @@
     bool running_at_post_data_reset_ = false;
 
     std::optional<std::string> on_failure_reboot_target_;
+
+    bool from_apex_ = false;
 };
 
 }  // namespace init
diff --git a/init/service_list.cpp b/init/service_list.cpp
index c51a9cf..3047821 100644
--- a/init/service_list.cpp
+++ b/init/service_list.cpp
@@ -86,7 +86,7 @@
             LOG(ERROR) << "delayed service '" << name << "' could not be found.";
             continue;
         }
-        if (auto result = service->Start(); !result) {
+        if (auto result = service->Start(); !result.ok()) {
             LOG(ERROR) << result.error().message();
         }
     }
diff --git a/init/service_list.h b/init/service_list.h
index ee2c702..1838624 100644
--- a/init/service_list.h
+++ b/init/service_list.h
@@ -34,6 +34,11 @@
 
     void AddService(std::unique_ptr<Service> service);
     void RemoveService(const Service& svc);
+    template <class UnaryPredicate>
+    void RemoveServiceIf(UnaryPredicate predicate) {
+        services_.erase(std::remove_if(services_.begin(), services_.end(), predicate),
+                        services_.end());
+    }
 
     template <typename T, typename F = decltype(&Service::name)>
     Service* FindService(T value, F function = &Service::name) const {
diff --git a/init/service_parser.cpp b/init/service_parser.cpp
index e7808a9..4b04ba0 100644
--- a/init/service_parser.cpp
+++ b/init/service_parser.cpp
@@ -29,6 +29,7 @@
 #include <hidl-util/FQName.h>
 #include <system/thread_defs.h>
 
+#include "lmkd_service.h"
 #include "rlimit_parser.h"
 #include "service_utils.h"
 #include "util.h"
@@ -118,14 +119,14 @@
 
 Result<void> ServiceParser::ParseGroup(std::vector<std::string>&& args) {
     auto gid = DecodeUid(args[1]);
-    if (!gid) {
+    if (!gid.ok()) {
         return Error() << "Unable to decode GID for '" << args[1] << "': " << gid.error();
     }
     service_->proc_attr_.gid = *gid;
 
     for (std::size_t n = 2; n < args.size(); n++) {
         gid = DecodeUid(args[n]);
-        if (!gid) {
+        if (!gid.ok()) {
             return Error() << "Unable to decode GID for '" << args[n] << "': " << gid.error();
         }
         service_->proc_attr_.supp_gids.emplace_back(*gid);
@@ -201,13 +202,13 @@
     auto it = args.begin() + 1;
     if (args.size() == 2 && StartsWith(args[1], "$")) {
         auto expanded = ExpandProps(args[1]);
-        if (!expanded) {
+        if (!expanded.ok()) {
             return expanded.error();
         }
 
         // If the property is not set, it defaults to none, in which case there are no keycodes
         // for this service.
-        if (expanded == "none") {
+        if (*expanded == "none") {
             return {};
         }
 
@@ -239,7 +240,7 @@
 Result<void> ServiceParser::ParseOnrestart(std::vector<std::string>&& args) {
     args.erase(args.begin());
     int line = service_->onrestart_.NumCommands() + 1;
-    if (auto result = service_->onrestart_.AddCommand(std::move(args), line); !result) {
+    if (auto result = service_->onrestart_.AddCommand(std::move(args), line); !result.ok()) {
         return Error() << "cannot add Onrestart command: " << result.error();
     }
     return {};
@@ -261,8 +262,10 @@
 }
 
 Result<void> ServiceParser::ParseOomScoreAdjust(std::vector<std::string>&& args) {
-    if (!ParseInt(args[1], &service_->oom_score_adjust_, -1000, 1000)) {
-        return Error() << "oom_score_adjust value must be in range -1000 - +1000";
+    if (!ParseInt(args[1], &service_->oom_score_adjust_, MIN_OOM_SCORE_ADJUST,
+                  MAX_OOM_SCORE_ADJUST)) {
+        return Error() << "oom_score_adjust value must be in range " << MIN_OOM_SCORE_ADJUST
+                       << " - +" << MAX_OOM_SCORE_ADJUST;
     }
     return {};
 }
@@ -307,7 +310,7 @@
 
 Result<void> ServiceParser::ParseProcessRlimit(std::vector<std::string>&& args) {
     auto rlimit = ParseRlimit(args);
-    if (!rlimit) return rlimit.error();
+    if (!rlimit.ok()) return rlimit.error();
 
     service_->proc_attr_.rlimits.emplace_back(*rlimit);
     return {};
@@ -404,7 +407,7 @@
 
     if (args.size() > 4) {
         auto uid = DecodeUid(args[4]);
-        if (!uid) {
+        if (!uid.ok()) {
             return Error() << "Unable to find UID for '" << args[4] << "': " << uid.error();
         }
         socket.uid = *uid;
@@ -412,7 +415,7 @@
 
     if (args.size() > 5) {
         auto gid = DecodeUid(args[5]);
-        if (!gid) {
+        if (!gid.ok()) {
             return Error() << "Unable to find GID for '" << args[5] << "': " << gid.error();
         }
         socket.gid = *gid;
@@ -450,7 +453,7 @@
     file.type = args[2];
 
     auto file_name = ExpandProps(args[1]);
-    if (!file_name) {
+    if (!file_name.ok()) {
         return Error() << "Could not expand file path ': " << file_name.error();
     }
     file.name = *file_name;
@@ -472,7 +475,7 @@
 
 Result<void> ServiceParser::ParseUser(std::vector<std::string>&& args) {
     auto uid = DecodeUid(args[1]);
-    if (!uid) {
+    if (!uid.ok()) {
         return Error() << "Unable to find UID for '" << args[1] << "': " << uid.error();
     }
     service_->proc_attr_.uid = *uid;
@@ -560,8 +563,13 @@
             str_args[0] = "/system/bin/watchdogd";
         }
     }
+    if (SelinuxGetVendorAndroidVersion() <= __ANDROID_API_Q__) {
+        if (str_args[0] == "/charger") {
+            str_args[0] = "/system/bin/charger";
+        }
+    }
 
-    service_ = std::make_unique<Service>(name, restart_action_subcontext, str_args);
+    service_ = std::make_unique<Service>(name, restart_action_subcontext, str_args, from_apex_);
     return {};
 }
 
@@ -572,7 +580,7 @@
 
     auto parser = GetParserMap().Find(args);
 
-    if (!parser) return parser.error();
+    if (!parser.ok()) return parser.error();
 
     return std::invoke(*parser, this, std::move(args));
 }
@@ -585,7 +593,7 @@
     if (interface_inheritance_hierarchy_) {
         if (const auto& check_hierarchy_result = CheckInterfaceInheritanceHierarchy(
                     service_->interfaces(), *interface_inheritance_hierarchy_);
-            !check_hierarchy_result) {
+            !check_hierarchy_result.ok()) {
             return Error() << check_hierarchy_result.error();
         }
     }
diff --git a/init/service_parser.h b/init/service_parser.h
index b1281f5..7bb0cc0 100644
--- a/init/service_parser.h
+++ b/init/service_parser.h
@@ -31,11 +31,13 @@
   public:
     ServiceParser(
             ServiceList* service_list, Subcontext* subcontext,
-            const std::optional<InterfaceInheritanceHierarchyMap>& interface_inheritance_hierarchy)
+            const std::optional<InterfaceInheritanceHierarchyMap>& interface_inheritance_hierarchy,
+            bool from_apex = false)
         : service_list_(service_list),
           subcontext_(subcontext),
           interface_inheritance_hierarchy_(interface_inheritance_hierarchy),
-          service_(nullptr) {}
+          service_(nullptr),
+          from_apex_(from_apex) {}
     Result<void> ParseSection(std::vector<std::string>&& args, const std::string& filename,
                               int line) override;
     Result<void> ParseLineSection(std::vector<std::string>&& args, int line) override;
@@ -89,6 +91,7 @@
     std::optional<InterfaceInheritanceHierarchyMap> interface_inheritance_hierarchy_;
     std::unique_ptr<Service> service_;
     std::string filename_;
+    bool from_apex_ = false;
 };
 
 }  // namespace init
diff --git a/init/service_test.cpp b/init/service_test.cpp
index c9cc7bd..22ee844 100644
--- a/init/service_test.cpp
+++ b/init/service_test.cpp
@@ -23,6 +23,7 @@
 
 #include <gtest/gtest.h>
 
+#include "lmkd_service.h"
 #include "util.h"
 
 namespace android {
@@ -49,7 +50,7 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory->priority());
-    EXPECT_EQ(-1000, service_in_old_memory->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 
     for (std::size_t i = 0; i < memory_size; ++i) {
@@ -68,22 +69,22 @@
     EXPECT_EQ(IoSchedClass_NONE, service_in_old_memory2->ioprio_class());
     EXPECT_EQ(0, service_in_old_memory2->ioprio_pri());
     EXPECT_EQ(0, service_in_old_memory2->priority());
-    EXPECT_EQ(-1000, service_in_old_memory2->oom_score_adjust());
+    EXPECT_EQ(DEFAULT_OOM_SCORE_ADJUST, service_in_old_memory2->oom_score_adjust());
     EXPECT_FALSE(service_in_old_memory->process_cgroup_empty());
 }
 
 TEST(service, make_temporary_oneshot_service_invalid_syntax) {
     std::vector<std::string> args;
     // Nothing.
-    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args));
+    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args).ok());
 
     // No arguments to 'exec'.
     args.push_back("exec");
-    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args));
+    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args).ok());
 
     // No command in "exec --".
     args.push_back("--");
-    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args));
+    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args).ok());
 }
 
 TEST(service, make_temporary_oneshot_service_too_many_supplementary_gids) {
@@ -97,7 +98,7 @@
     }
     args.push_back("--");
     args.push_back("/system/bin/id");
-    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args));
+    ASSERT_FALSE(Service::MakeTemporaryOneshotService(args).ok());
 }
 
 static void Test_make_temporary_oneshot_service(bool dash_dash, bool seclabel, bool uid, bool gid,
@@ -123,7 +124,7 @@
     args.push_back("/system/bin/toybox");
     args.push_back("id");
     auto service_ret = Service::MakeTemporaryOneshotService(args);
-    ASSERT_TRUE(service_ret);
+    ASSERT_RESULT_OK(service_ret);
     auto svc = std::move(*service_ret);
 
     if (seclabel) {
@@ -133,14 +134,14 @@
     }
     if (uid) {
         auto decoded_uid = DecodeUid("log");
-        ASSERT_TRUE(decoded_uid);
+        ASSERT_RESULT_OK(decoded_uid);
         ASSERT_EQ(*decoded_uid, svc->uid());
     } else {
         ASSERT_EQ(0U, svc->uid());
     }
     if (gid) {
         auto decoded_uid = DecodeUid("shell");
-        ASSERT_TRUE(decoded_uid);
+        ASSERT_RESULT_OK(decoded_uid);
         ASSERT_EQ(*decoded_uid, svc->gid());
     } else {
         ASSERT_EQ(0U, svc->gid());
@@ -149,11 +150,11 @@
         ASSERT_EQ(2U, svc->supp_gids().size());
 
         auto decoded_uid = DecodeUid("system");
-        ASSERT_TRUE(decoded_uid);
+        ASSERT_RESULT_OK(decoded_uid);
         ASSERT_EQ(*decoded_uid, svc->supp_gids()[0]);
 
         decoded_uid = DecodeUid("adb");
-        ASSERT_TRUE(decoded_uid);
+        ASSERT_RESULT_OK(decoded_uid);
         ASSERT_EQ(*decoded_uid, svc->supp_gids()[1]);
     } else {
         ASSERT_EQ(0U, svc->supp_gids().size());
diff --git a/init/service_utils.cpp b/init/service_utils.cpp
index 93cffd8..484c2c8 100644
--- a/init/service_utils.cpp
+++ b/init/service_utils.cpp
@@ -167,7 +167,7 @@
 Result<Descriptor> SocketDescriptor::Create(const std::string& global_context) const {
     const auto& socket_context = context.empty() ? global_context : context;
     auto result = CreateSocket(name, type | SOCK_CLOEXEC, passcred, perm, uid, gid, socket_context);
-    if (!result) {
+    if (!result.ok()) {
         return result.error();
     }
 
@@ -196,7 +196,7 @@
 
 Result<void> EnterNamespaces(const NamespaceInfo& info, const std::string& name, bool pre_apexd) {
     for (const auto& [nstype, path] : info.namespaces_to_enter) {
-        if (auto result = EnterNamespace(nstype, path.c_str()); !result) {
+        if (auto result = EnterNamespace(nstype, path.c_str()); !result.ok()) {
             return result;
         }
     }
@@ -214,14 +214,14 @@
         bool remount_sys =
                 std::any_of(info.namespaces_to_enter.begin(), info.namespaces_to_enter.end(),
                             [](const auto& entry) { return entry.first == CLONE_NEWNET; });
-        if (auto result = SetUpMountNamespace(remount_proc, remount_sys); !result) {
+        if (auto result = SetUpMountNamespace(remount_proc, remount_sys); !result.ok()) {
             return result;
         }
     }
 
     if (info.flags & CLONE_NEWPID) {
         // This will fork again to run an init process inside the PID namespace.
-        if (auto result = SetUpPidNamespace(name.c_str()); !result) {
+        if (auto result = SetUpPidNamespace(name.c_str()); !result.ok()) {
             return result;
         }
     }
@@ -249,9 +249,8 @@
 
     for (const auto& rlimit : attr.rlimits) {
         if (setrlimit(rlimit.first, &rlimit.second) == -1) {
-            return ErrnoError() << StringPrintf(
-                           "setrlimit(%d, {rlim_cur=%ld, rlim_max=%ld}) failed", rlimit.first,
-                           rlimit.second.rlim_cur, rlimit.second.rlim_max);
+            return ErrnoErrorf("setrlimit({}, {{rlim_cur={}, rlim_max={}}}) failed", rlimit.first,
+                               rlimit.second.rlim_cur, rlimit.second.rlim_max);
         }
     }
 
diff --git a/init/subcontext.cpp b/init/subcontext.cpp
index 79fc372..3260159 100644
--- a/init/subcontext.cpp
+++ b/init/subcontext.cpp
@@ -51,6 +51,8 @@
 namespace init {
 namespace {
 
+std::string shutdown_command;
+
 class SubcontextProcess {
   public:
     SubcontextProcess(const BuiltinFunctionMap* function_map, std::string context, int init_fd)
@@ -78,13 +80,13 @@
 
     auto map_result = function_map_->Find(args);
     Result<void> result;
-    if (!map_result) {
+    if (!map_result.ok()) {
         result = Error() << "Cannot find command: " << map_result.error();
     } else {
         result = RunBuiltinFunction(map_result->function, args, context_);
     }
 
-    if (result) {
+    if (result.ok()) {
         reply->set_success(true);
     } else {
         auto* failure = reply->mutable_failure();
@@ -97,7 +99,7 @@
                                    SubcontextReply* reply) const {
     for (const auto& arg : expand_args_command.args()) {
         auto expanded_arg = ExpandProps(arg);
-        if (!expanded_arg) {
+        if (!expanded_arg.ok()) {
             auto* failure = reply->mutable_failure();
             failure->set_error_string(expanded_arg.error().message());
             failure->set_error_errno(0);
@@ -123,7 +125,7 @@
         }
 
         auto init_message = ReadMessage(init_fd_);
-        if (!init_message) {
+        if (!init_message.ok()) {
             if (init_message.error().code() == 0) {
                 // If the init file descriptor was closed, let's exit quietly. If
                 // this was accidental, init will restart us. If init died, this
@@ -153,7 +155,12 @@
                            << subcontext_command.command_case();
         }
 
-        if (auto result = SendMessage(init_fd_, reply); !result) {
+        if (!shutdown_command.empty()) {
+            reply.set_trigger_shutdown(shutdown_command);
+            shutdown_command.clear();
+        }
+
+        if (auto result = SendMessage(init_fd_, reply); !result.ok()) {
             LOG(FATAL) << "Failed to send message to init: " << result.error();
         }
     }
@@ -169,10 +176,7 @@
 
     SelabelInitialize();
 
-    property_set = [](const std::string& key, const std::string& value) -> uint32_t {
-        android::base::SetProperty(key, value);
-        return 0;
-    };
+    trigger_shutdown = [](const std::string& command) { shutdown_command = command; };
 
     auto subcontext_process = SubcontextProcess(function_map, context, init_fd);
     subcontext_process.MainLoop();
@@ -200,8 +204,12 @@
             PLOG(FATAL) << "Could not dup child_fd";
         }
 
-        if (setexeccon(context_.c_str()) < 0) {
-            PLOG(FATAL) << "Could not set execcon for '" << context_ << "'";
+        // We don't switch contexts if we're running the unit tests.  We don't use std::optional,
+        // since we still need a real context string to pass to the builtin functions.
+        if (context_ != kTestContext) {
+            if (setexeccon(context_.c_str()) < 0) {
+                PLOG(FATAL) << "Could not set execcon for '" << context_ << "'";
+            }
         }
 
         auto init_path = GetExecutablePath();
@@ -238,13 +246,13 @@
 }
 
 Result<SubcontextReply> Subcontext::TransmitMessage(const SubcontextCommand& subcontext_command) {
-    if (auto result = SendMessage(socket_, subcontext_command); !result) {
+    if (auto result = SendMessage(socket_, subcontext_command); !result.ok()) {
         Restart();
         return ErrnoError() << "Failed to send message to subcontext";
     }
 
     auto subcontext_message = ReadMessage(socket_);
-    if (!subcontext_message) {
+    if (!subcontext_message.ok()) {
         Restart();
         return Error() << "Failed to receive result from subcontext: " << subcontext_message.error();
     }
@@ -254,6 +262,11 @@
         Restart();
         return Error() << "Unable to parse message from subcontext";
     }
+
+    if (subcontext_reply.has_trigger_shutdown()) {
+        trigger_shutdown(subcontext_reply.trigger_shutdown());
+    }
+
     return subcontext_reply;
 }
 
@@ -264,7 +277,7 @@
         RepeatedPtrFieldBackInserter(subcontext_command.mutable_execute_command()->mutable_args()));
 
     auto subcontext_reply = TransmitMessage(subcontext_command);
-    if (!subcontext_reply) {
+    if (!subcontext_reply.ok()) {
         return subcontext_reply.error();
     }
 
@@ -288,7 +301,7 @@
                   subcontext_command.mutable_expand_args_command()->mutable_args()));
 
     auto subcontext_reply = TransmitMessage(subcontext_command);
-    if (!subcontext_reply) {
+    if (!subcontext_reply.ok()) {
         return subcontext_reply.error();
     }
 
diff --git a/init/subcontext.h b/init/subcontext.h
index bcaad29..5e1d8a8 100644
--- a/init/subcontext.h
+++ b/init/subcontext.h
@@ -32,6 +32,7 @@
 
 static constexpr const char kInitContext[] = "u:r:init:s0";
 static constexpr const char kVendorContext[] = "u:r:vendor_init:s0";
+static constexpr const char kTestContext[] = "test-test-test";
 
 class Subcontext {
   public:
diff --git a/init/subcontext.proto b/init/subcontext.proto
index e68115e..068c7ce 100644
--- a/init/subcontext.proto
+++ b/init/subcontext.proto
@@ -38,4 +38,6 @@
         Failure failure = 2;
         ExpandArgsReply expand_args_reply = 3;
     }
+
+    optional string trigger_shutdown = 4;
 }
\ No newline at end of file
diff --git a/init/subcontext_test.cpp b/init/subcontext_test.cpp
index 9cac35e..ee765a7 100644
--- a/init/subcontext_test.cpp
+++ b/init/subcontext_test.cpp
@@ -26,6 +26,7 @@
 #include <selinux/selinux.h>
 
 #include "builtin_arguments.h"
+#include "util.h"
 
 using namespace std::literals;
 
@@ -38,24 +39,12 @@
 namespace android {
 namespace init {
 
-// I would use test fixtures, but I cannot skip the test if not root with them, so instead we have
-// this test runner.
 template <typename F>
 void RunTest(F&& test_function) {
-    if (getuid() != 0) {
-        GTEST_SKIP() << "Skipping test, must be run as root.";
-        return;
-    }
-
-    char* context;
-    ASSERT_EQ(0, getcon(&context));
-    auto context_string = std::string(context);
-    free(context);
-
-    auto subcontext = Subcontext({"dummy_path"}, context_string);
+    auto subcontext = Subcontext({"dummy_path"}, kTestContext);
     ASSERT_NE(0, subcontext.pid());
 
-    test_function(subcontext, context_string);
+    test_function(subcontext);
 
     if (subcontext.pid() > 0) {
         kill(subcontext.pid(), SIGTERM);
@@ -64,9 +53,9 @@
 }
 
 TEST(subcontext, CheckDifferentPid) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto result = subcontext.Execute(std::vector<std::string>{"return_pids_as_error"});
-        ASSERT_FALSE(result);
+        ASSERT_FALSE(result.ok());
 
         auto pids = Split(result.error().message(), " ");
         ASSERT_EQ(2U, pids.size());
@@ -77,7 +66,12 @@
 }
 
 TEST(subcontext, SetProp) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    if (getuid() != 0) {
+        GTEST_SKIP() << "Skipping test, must be run as root.";
+        return;
+    }
+
+    RunTest([](auto& subcontext) {
         SetProperty("init.test.subcontext", "fail");
         WaitForProperty("init.test.subcontext", "fail");
 
@@ -87,14 +81,14 @@
             "success",
         };
         auto result = subcontext.Execute(args);
-        ASSERT_TRUE(result) << result.error();
+        ASSERT_RESULT_OK(result);
 
         EXPECT_TRUE(WaitForProperty("init.test.subcontext", "success", 10s));
     });
 }
 
 TEST(subcontext, MultipleCommands) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto first_pid = subcontext.pid();
 
         auto expected_words = std::vector<std::string>{
@@ -110,47 +104,59 @@
                 word,
             };
             auto result = subcontext.Execute(args);
-            ASSERT_TRUE(result) << result.error();
+            ASSERT_RESULT_OK(result);
         }
 
         auto result = subcontext.Execute(std::vector<std::string>{"return_words_as_error"});
-        ASSERT_FALSE(result);
+        ASSERT_FALSE(result.ok());
         EXPECT_EQ(Join(expected_words, " "), result.error().message());
         EXPECT_EQ(first_pid, subcontext.pid());
     });
 }
 
 TEST(subcontext, RecoverAfterAbort) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto first_pid = subcontext.pid();
 
         auto result = subcontext.Execute(std::vector<std::string>{"cause_log_fatal"});
-        ASSERT_FALSE(result);
+        ASSERT_FALSE(result.ok());
 
         auto result2 = subcontext.Execute(std::vector<std::string>{"generate_sane_error"});
-        ASSERT_FALSE(result2);
+        ASSERT_FALSE(result2.ok());
         EXPECT_EQ("Sane error!", result2.error().message());
         EXPECT_NE(subcontext.pid(), first_pid);
     });
 }
 
 TEST(subcontext, ContextString) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto result = subcontext.Execute(std::vector<std::string>{"return_context_as_error"});
-        ASSERT_FALSE(result);
-        ASSERT_EQ(context_string, result.error().message());
+        ASSERT_FALSE(result.ok());
+        ASSERT_EQ(kTestContext, result.error().message());
     });
 }
 
+TEST(subcontext, TriggerShutdown) {
+    static constexpr const char kTestShutdownCommand[] = "reboot,test-shutdown-command";
+    static std::string trigger_shutdown_command;
+    trigger_shutdown = [](const std::string& command) { trigger_shutdown_command = command; };
+    RunTest([](auto& subcontext) {
+        auto result = subcontext.Execute(
+                std::vector<std::string>{"trigger_shutdown", kTestShutdownCommand});
+        ASSERT_RESULT_OK(result);
+    });
+    EXPECT_EQ(kTestShutdownCommand, trigger_shutdown_command);
+}
+
 TEST(subcontext, ExpandArgs) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto args = std::vector<std::string>{
             "first",
             "${ro.hardware}",
             "$$third",
         };
         auto result = subcontext.ExpandArgs(args);
-        ASSERT_TRUE(result) << result.error();
+        ASSERT_RESULT_OK(result);
         ASSERT_EQ(3U, result->size());
         EXPECT_EQ(args[0], result->at(0));
         EXPECT_EQ(GetProperty("ro.hardware", ""), result->at(1));
@@ -159,13 +165,13 @@
 }
 
 TEST(subcontext, ExpandArgsFailure) {
-    RunTest([](auto& subcontext, auto& context_string) {
+    RunTest([](auto& subcontext) {
         auto args = std::vector<std::string>{
             "first",
             "${",
         };
         auto result = subcontext.ExpandArgs(args);
-        ASSERT_FALSE(result);
+        ASSERT_FALSE(result.ok());
         EXPECT_EQ("unexpected end of string in '" + args[1] + "', looking for }",
                   result.error().message());
     });
@@ -207,6 +213,11 @@
         return Error() << args.context;
     };
 
+    auto do_trigger_shutdown = [](const BuiltinArguments& args) -> Result<void> {
+        trigger_shutdown(args[1]);
+        return {};
+    };
+
     // clang-format off
     BuiltinFunctionMap test_function_map = {
         {"return_pids_as_error",        {0,     0,      {true,  do_return_pids_as_error}}},
@@ -216,6 +227,7 @@
         {"cause_log_fatal",             {0,     0,      {true,  do_cause_log_fatal}}},
         {"generate_sane_error",         {0,     0,      {true,  do_generate_sane_error}}},
         {"return_context_as_error",     {0,     0,      {true,  do_return_context_as_error}}},
+        {"trigger_shutdown",            {1,     1,      {true,  do_trigger_shutdown}}},
     };
     // clang-format on
     return test_function_map;
diff --git a/init/sysprop/Android.bp b/init/sysprop/Android.bp
new file mode 100644
index 0000000..7582875
--- /dev/null
+++ b/init/sysprop/Android.bp
@@ -0,0 +1,7 @@
+sysprop_library {
+  name: "com.android.sysprop.init",
+  srcs: ["InitProperties.sysprop"],
+  property_owner: "Platform",
+  api_packages: ["android.sysprop"],
+  recovery_available: true,
+}
diff --git a/init/sysprop/InitProperties.sysprop b/init/sysprop/InitProperties.sysprop
new file mode 100644
index 0000000..b876dc0
--- /dev/null
+++ b/init/sysprop/InitProperties.sysprop
@@ -0,0 +1,36 @@
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+owner: Platform
+module: "android.sysprop.InitProperties"
+
+# Serves as a signal to all processes that userspace reboot is happening.
+prop {
+    api_name: "userspace_reboot_in_progress"
+    type: Boolean
+    scope: Public
+    access: ReadWrite
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+}
+
+# Shows whenever the device supports userspace reboot or not.
+prop {
+    api_name: "is_userspace_reboot_supported"
+    type: Boolean
+    scope: Public
+    access: Readonly
+    prop_name: "ro.init.userspace_reboot.is_supported"
+    integer_as_bool: true
+}
diff --git a/init/sysprop/api/com.android.sysprop.init-current.txt b/init/sysprop/api/com.android.sysprop.init-current.txt
new file mode 100644
index 0000000..b8bcef9
--- /dev/null
+++ b/init/sysprop/api/com.android.sysprop.init-current.txt
@@ -0,0 +1,14 @@
+props {
+  module: "android.sysprop.InitProperties"
+  prop {
+    api_name: "is_userspace_reboot_supported"
+    prop_name: "ro.init.userspace_reboot.is_supported"
+    integer_as_bool: true
+  }
+  prop {
+    api_name: "userspace_reboot_in_progress"
+    access: ReadWrite
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+  }
+}
diff --git a/init/sysprop/api/com.android.sysprop.init-latest.txt b/init/sysprop/api/com.android.sysprop.init-latest.txt
new file mode 100644
index 0000000..c835b95
--- /dev/null
+++ b/init/sysprop/api/com.android.sysprop.init-latest.txt
@@ -0,0 +1,9 @@
+props {
+  module: "android.sysprop.InitProperties"
+  prop {
+    api_name: "userspace_reboot_in_progress"
+    scope: Public
+    prop_name: "sys.init.userspace_reboot.in_progress"
+    integer_as_bool: true
+  }
+}
diff --git a/init/test_utils/include/init-test-utils/service_utils.h b/init/test_utils/include/init-test-utils/service_utils.h
index 3ec61d4..f9366ea 100644
--- a/init/test_utils/include/init-test-utils/service_utils.h
+++ b/init/test_utils/include/init-test-utils/service_utils.h
@@ -20,12 +20,20 @@
 #include <set>
 
 #include <android-base/result.h>
-#include <hidl-util/FqInstance.h>
 
 namespace android {
 namespace init {
 
-using ServiceInterfacesMap = std::map<std::string, std::set<android::FqInstance>>;
+// this is service name -> interface declaration
+//
+// So, for:
+//     service foo ..
+//         interface aidl baz
+//         interface android.hardware.foo@1.0 IFoo
+//
+// We have:
+//     foo -> { aidl/baz, android.hardware.foo@1.0/IFoo }
+using ServiceInterfacesMap = std::map<std::string, std::set<std::string>>;
 android::base::Result<ServiceInterfacesMap> GetOnDeviceServiceInterfacesMap();
 
 }  // namespace init
diff --git a/init/test_utils/service_utils.cpp b/init/test_utils/service_utils.cpp
index bc00702..ae68679 100644
--- a/init/test_utils/service_utils.cpp
+++ b/init/test_utils/service_utils.cpp
@@ -47,14 +47,7 @@
     for (const auto& service : service_list.services()) {
         // Create an entry for all services, including services that may not
         // have any declared interfaces.
-        result[service->name()] = std::set<android::FqInstance>();
-        for (const auto& intf : service->interfaces()) {
-            android::FqInstance fqInstance;
-            if (!fqInstance.setTo(intf)) {
-                return android::base::Error() << "Unable to parse interface: '" << intf << "'";
-            }
-            result[service->name()].insert(fqInstance);
-        }
+        result[service->name()] = service->interfaces();
     }
     return result;
 }
diff --git a/init/uevent_listener.cpp b/init/uevent_listener.cpp
index 416d942..d8d9b36 100644
--- a/init/uevent_listener.cpp
+++ b/init/uevent_listener.cpp
@@ -100,7 +100,7 @@
     int n = uevent_kernel_multicast_recv(device_fd_, msg, UEVENT_MSG_LEN);
     if (n <= 0) {
         if (errno != EAGAIN && errno != EWOULDBLOCK) {
-            LOG(ERROR) << "Error reading from Uevent Fd";
+            PLOG(ERROR) << "Error reading from Uevent Fd";
         }
         return false;
     }
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
index 59f91ee..d2b503b 100644
--- a/init/ueventd.cpp
+++ b/init/ueventd.cpp
@@ -288,7 +288,7 @@
     // TODO: cleanup platform ueventd.rc to remove vendor specific device node entries (b/34968103)
     auto hardware = android::base::GetProperty("ro.hardware", "");
 
-    auto ueventd_configuration = ParseConfig({"/ueventd.rc", "/vendor/ueventd.rc",
+    auto ueventd_configuration = ParseConfig({"/system/etc/ueventd.rc", "/vendor/ueventd.rc",
                                               "/odm/ueventd.rc", "/ueventd." + hardware + ".rc"});
 
     uevent_handlers.emplace_back(std::make_unique<DeviceHandler>(
diff --git a/init/ueventd_parser.cpp b/init/ueventd_parser.cpp
index a74b247..09dce44 100644
--- a/init/ueventd_parser.cpp
+++ b/init/ueventd_parser.cpp
@@ -209,7 +209,7 @@
 
     auto parser = parser_map.Find(args);
 
-    if (!parser) return Error() << parser.error();
+    if (!parser.ok()) return Error() << parser.error();
 
     return std::invoke(*parser, this, std::move(args));
 }
diff --git a/init/util.cpp b/init/util.cpp
index 40db838..503c705 100644
--- a/init/util.cpp
+++ b/init/util.cpp
@@ -61,6 +61,8 @@
 
 const std::string kDefaultAndroidDtDir("/proc/device-tree/firmware/android/");
 
+void (*trigger_shutdown)(const std::string& command) = nullptr;
+
 // DecodeUid() - decodes and returns the given string, which can be either the
 // numeric or name representation, into the integer uid or gid.
 Result<uid_t> DecodeUid(const std::string& name) {
@@ -232,15 +234,14 @@
     return -1;
 }
 
-void import_kernel_cmdline(bool in_qemu,
-                           const std::function<void(const std::string&, const std::string&, bool)>& fn) {
+void ImportKernelCmdline(const std::function<void(const std::string&, const std::string&)>& fn) {
     std::string cmdline;
     android::base::ReadFileToString("/proc/cmdline", &cmdline);
 
     for (const auto& entry : android::base::Split(android::base::Trim(cmdline), " ")) {
         std::vector<std::string> pieces = android::base::Split(entry, "=");
         if (pieces.size() == 2) {
-            fn(pieces[0], pieces[1], in_qemu);
+            fn(pieces[0], pieces[1]);
         }
     }
 }
@@ -357,12 +358,11 @@
     // Use the standard procfs-based path by default
     std::string android_dt_dir = kDefaultAndroidDtDir;
     // The platform may specify a custom Android DT path in kernel cmdline
-    import_kernel_cmdline(false,
-                          [&](const std::string& key, const std::string& value, bool in_qemu) {
-                              if (key == "androidboot.android_dt_dir") {
-                                  android_dt_dir = value;
-                              }
-                          });
+    ImportKernelCmdline([&](const std::string& key, const std::string& value) {
+        if (key == "androidboot.android_dt_dir") {
+            android_dt_dir = value;
+        }
+    });
     LOG(INFO) << "Using Android DT directory " << android_dt_dir;
     return android_dt_dir;
 }
@@ -434,6 +434,142 @@
     return {};
 }
 
+static FscryptAction FscryptInferAction(const std::string& dir) {
+    const std::string prefix = "/data/";
+
+    if (!android::base::StartsWith(dir, prefix)) {
+        return FscryptAction::kNone;
+    }
+
+    // Special-case /data/media/obb per b/64566063
+    if (dir == "/data/media/obb") {
+        // Try to set policy on this directory, but if it is non-empty this may fail.
+        return FscryptAction::kAttempt;
+    }
+
+    // Only set policy on first level /data directories
+    // To make this less restrictive, consider using a policy file.
+    // However this is overkill for as long as the policy is simply
+    // to apply a global policy to all /data folders created via makedir
+    if (dir.find_first_of('/', prefix.size()) != std::string::npos) {
+        return FscryptAction::kNone;
+    }
+
+    // Special case various directories that must not be encrypted,
+    // often because their subdirectories must be encrypted.
+    // This isn't a nice way to do this, see b/26641735
+    std::vector<std::string> directories_to_exclude = {
+            "lost+found", "system_ce", "system_de", "misc_ce",     "misc_de",
+            "vendor_ce",  "vendor_de", "media",     "data",        "user",
+            "user_de",    "apex",      "preloads",  "app-staging", "gsi",
+    };
+    for (const auto& d : directories_to_exclude) {
+        if ((prefix + d) == dir) {
+            return FscryptAction::kNone;
+        }
+    }
+    // Empty these directories if policy setting fails.
+    std::vector<std::string> wipe_on_failure = {
+            "rollback", "rollback-observer",  // b/139193659
+    };
+    for (const auto& d : wipe_on_failure) {
+        if ((prefix + d) == dir) {
+            return FscryptAction::kDeleteIfNecessary;
+        }
+    }
+    return FscryptAction::kRequire;
+}
+
+Result<MkdirOptions> ParseMkdir(const std::vector<std::string>& args) {
+    mode_t mode = 0755;
+    Result<uid_t> uid = -1;
+    Result<gid_t> gid = -1;
+    FscryptAction fscrypt_inferred_action = FscryptInferAction(args[1]);
+    FscryptAction fscrypt_action = fscrypt_inferred_action;
+    std::string ref_option = "ref";
+    bool set_option_encryption = false;
+    bool set_option_key = false;
+
+    for (size_t i = 2; i < args.size(); i++) {
+        switch (i) {
+            case 2:
+                mode = std::strtoul(args[2].c_str(), 0, 8);
+                break;
+            case 3:
+                uid = DecodeUid(args[3]);
+                if (!uid.ok()) {
+                    return Error()
+                           << "Unable to decode UID for '" << args[3] << "': " << uid.error();
+                }
+                break;
+            case 4:
+                gid = DecodeUid(args[4]);
+                if (!gid.ok()) {
+                    return Error()
+                           << "Unable to decode GID for '" << args[4] << "': " << gid.error();
+                }
+                break;
+            default:
+                auto parts = android::base::Split(args[i], "=");
+                if (parts.size() != 2) {
+                    return Error() << "Can't parse option: '" << args[i] << "'";
+                }
+                auto optname = parts[0];
+                auto optval = parts[1];
+                if (optname == "encryption") {
+                    if (set_option_encryption) {
+                        return Error() << "Duplicated option: '" << optname << "'";
+                    }
+                    if (optval == "Require") {
+                        fscrypt_action = FscryptAction::kRequire;
+                    } else if (optval == "None") {
+                        fscrypt_action = FscryptAction::kNone;
+                    } else if (optval == "Attempt") {
+                        fscrypt_action = FscryptAction::kAttempt;
+                    } else if (optval == "DeleteIfNecessary") {
+                        fscrypt_action = FscryptAction::kDeleteIfNecessary;
+                    } else {
+                        return Error() << "Unknown encryption option: '" << optval << "'";
+                    }
+                    set_option_encryption = true;
+                } else if (optname == "key") {
+                    if (set_option_key) {
+                        return Error() << "Duplicated option: '" << optname << "'";
+                    }
+                    if (optval == "ref" || optval == "per_boot_ref") {
+                        ref_option = optval;
+                    } else {
+                        return Error() << "Unknown key option: '" << optval << "'";
+                    }
+                    set_option_key = true;
+                } else {
+                    return Error() << "Unknown option: '" << args[i] << "'";
+                }
+        }
+    }
+    if (set_option_key && fscrypt_action == FscryptAction::kNone) {
+        return Error() << "Key option set but encryption action is none";
+    }
+    const std::string prefix = "/data/";
+    if (StartsWith(args[1], prefix) &&
+        args[1].find_first_of('/', prefix.size()) == std::string::npos) {
+        if (!set_option_encryption) {
+            LOG(WARNING) << "Top-level directory needs encryption action, eg mkdir " << args[1]
+                         << " <mode> <uid> <gid> encryption=Require";
+        }
+        if (fscrypt_action == FscryptAction::kNone) {
+            LOG(INFO) << "Not setting encryption policy on: " << args[1];
+        }
+    }
+    if (fscrypt_action != fscrypt_inferred_action) {
+        LOG(WARNING) << "Inferred action different from explicit one, expected "
+                     << static_cast<int>(fscrypt_inferred_action) << " but got "
+                     << static_cast<int>(fscrypt_action);
+    }
+
+    return MkdirOptions{args[1], mode, *uid, *gid, fscrypt_action, ref_option};
+}
+
 Result<std::pair<int, std::vector<std::string>>> ParseRestorecon(
         const std::vector<std::string>& args) {
     struct flag_type {
diff --git a/init/util.h b/init/util.h
index 4cccefe..ad322d9 100644
--- a/init/util.h
+++ b/init/util.h
@@ -25,6 +25,7 @@
 
 #include <android-base/chrono_utils.h>
 
+#include "fscrypt_init_extensions.h"
 #include "result.h"
 
 using android::base::boot_clock;
@@ -34,6 +35,8 @@
 
 static const char kColdBootDoneProp[] = "ro.cold_boot_done";
 
+extern void (*trigger_shutdown)(const std::string& command);
+
 Result<int> CreateSocket(const std::string& name, int type, bool passcred, mode_t perm, uid_t uid,
                          gid_t gid, const std::string& socketcon);
 
@@ -44,8 +47,7 @@
 
 bool mkdir_recursive(const std::string& pathname, mode_t mode);
 int wait_for_file(const char *filename, std::chrono::nanoseconds timeout);
-void import_kernel_cmdline(bool in_qemu,
-                           const std::function<void(const std::string&, const std::string&, bool)>&);
+void ImportKernelCmdline(const std::function<void(const std::string&, const std::string&)>&);
 bool make_dir(const std::string& path, mode_t mode);
 bool is_dir(const char* pathname);
 Result<std::string> ExpandProps(const std::string& src);
@@ -60,6 +62,17 @@
 bool IsLegalPropertyName(const std::string& name);
 Result<void> IsLegalPropertyValue(const std::string& name, const std::string& value);
 
+struct MkdirOptions {
+    std::string target;
+    mode_t mode;
+    uid_t uid;
+    gid_t gid;
+    FscryptAction fscrypt_action;
+    std::string ref_option;
+};
+
+Result<MkdirOptions> ParseMkdir(const std::vector<std::string>& args);
+
 Result<std::pair<int, std::vector<std::string>>> ParseRestorecon(
         const std::vector<std::string>& args);
 
diff --git a/init/util_test.cpp b/init/util_test.cpp
index 8947256..96a5b55 100644
--- a/init/util_test.cpp
+++ b/init/util_test.cpp
@@ -33,7 +33,7 @@
     errno = 0;
     auto file_contents = ReadFile("/proc/does-not-exist");
     EXPECT_EQ(ENOENT, errno);
-    ASSERT_FALSE(file_contents);
+    ASSERT_FALSE(file_contents.ok());
     EXPECT_EQ("open() failed: No such file or directory", file_contents.error().message());
 }
 
@@ -41,10 +41,10 @@
     std::string s("hello");
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
-    EXPECT_TRUE(WriteFile(tf.path, s)) << strerror(errno);
+    EXPECT_RESULT_OK(WriteFile(tf.path, s));
     EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0620, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
     auto file_contents = ReadFile(tf.path);
-    ASSERT_FALSE(file_contents) << strerror(errno);
+    ASSERT_FALSE(file_contents.ok()) << strerror(errno);
     EXPECT_EQ("Skipping insecure file", file_contents.error().message());
 }
 
@@ -52,26 +52,26 @@
     std::string s("hello");
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
-    EXPECT_TRUE(WriteFile(tf.path, s)) << strerror(errno);
+    EXPECT_RESULT_OK(WriteFile(tf.path, s));
     EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0602, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
     auto file_contents = ReadFile(tf.path);
-    ASSERT_FALSE(file_contents) << strerror(errno);
+    ASSERT_FALSE(file_contents.ok());
     EXPECT_EQ("Skipping insecure file", file_contents.error().message());
 }
 
 TEST(util, ReadFileSymbolicLink) {
     errno = 0;
-    // lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
-    auto file_contents = ReadFile("/charger");
+    // lrw------- 1 root root 23 2008-12-31 19:00 default.prop -> system/etc/prop.default
+    auto file_contents = ReadFile("/default.prop");
     EXPECT_EQ(ELOOP, errno);
-    ASSERT_FALSE(file_contents);
+    ASSERT_FALSE(file_contents.ok());
     EXPECT_EQ("open() failed: Too many symbolic links encountered",
               file_contents.error().message());
 }
 
 TEST(util, ReadFileSuccess) {
     auto file_contents = ReadFile("/proc/version");
-    ASSERT_TRUE(file_contents);
+    ASSERT_TRUE(file_contents.ok());
     EXPECT_GT(file_contents->length(), 6U);
     EXPECT_EQ('\n', file_contents->at(file_contents->length() - 1));
     (*file_contents)[5] = 0;
@@ -87,10 +87,10 @@
 
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
-    EXPECT_TRUE(WriteFile(tf.path, contents)) << strerror(errno);
+    EXPECT_RESULT_OK(WriteFile(tf.path, contents));
 
     auto read_back_contents = ReadFile(tf.path);
-    ASSERT_TRUE(read_back_contents) << strerror(errno);
+    ASSERT_RESULT_OK(read_back_contents);
     EXPECT_EQ(contents, *read_back_contents);
     EXPECT_EQ(10u, read_back_contents->size());
 }
@@ -99,14 +99,15 @@
     std::string s("hello");
     TemporaryDir test_dir;
     std::string path = android::base::StringPrintf("%s/does-not-exist", test_dir.path);
-    EXPECT_TRUE(WriteFile(path, s));
+    EXPECT_RESULT_OK(WriteFile(path, s));
     auto file_contents = ReadFile(path);
-    ASSERT_TRUE(file_contents);
+    ASSERT_RESULT_OK(file_contents);
     EXPECT_EQ(s, *file_contents);
     struct stat sb;
     int fd = open(path.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
     EXPECT_NE(-1, fd);
     EXPECT_EQ(0, fstat(fd, &sb));
+    EXPECT_EQ(0, close(fd));
     EXPECT_EQ((const unsigned int)(S_IRUSR | S_IWUSR), sb.st_mode & 0777);
     EXPECT_EQ(0, unlink(path.c_str()));
 }
@@ -114,27 +115,27 @@
 TEST(util, WriteFileExist) {
     TemporaryFile tf;
     ASSERT_TRUE(tf.fd != -1);
-    EXPECT_TRUE(WriteFile(tf.path, "1hello1")) << strerror(errno);
+    EXPECT_RESULT_OK(WriteFile(tf.path, "1hello1"));
     auto file_contents = ReadFile(tf.path);
-    ASSERT_TRUE(file_contents);
+    ASSERT_RESULT_OK(file_contents);
     EXPECT_EQ("1hello1", *file_contents);
-    EXPECT_TRUE(WriteFile(tf.path, "2ll2"));
+    EXPECT_RESULT_OK(WriteFile(tf.path, "2ll2"));
     file_contents = ReadFile(tf.path);
-    ASSERT_TRUE(file_contents);
+    ASSERT_RESULT_OK(file_contents);
     EXPECT_EQ("2ll2", *file_contents);
 }
 
 TEST(util, DecodeUid) {
     auto decoded_uid = DecodeUid("root");
-    EXPECT_TRUE(decoded_uid);
+    EXPECT_TRUE(decoded_uid.ok());
     EXPECT_EQ(0U, *decoded_uid);
 
     decoded_uid = DecodeUid("toot");
-    EXPECT_FALSE(decoded_uid);
+    EXPECT_FALSE(decoded_uid.ok());
     EXPECT_EQ("getpwnam failed: No such file or directory", decoded_uid.error().message());
 
     decoded_uid = DecodeUid("123");
-    EXPECT_TRUE(decoded_uid);
+    EXPECT_RESULT_OK(decoded_uid);
     EXPECT_EQ(123U, *decoded_uid);
 }
 
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index b9420d4..65af2b3 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -197,7 +197,10 @@
 
 cc_defaults {
     name: "libcutils_test_default",
-    srcs: ["sockets_test.cpp"],
+    srcs: [
+        "native_handle_test.cpp",
+        "sockets_test.cpp",
+    ],
 
     target: {
         android: {
@@ -244,17 +247,18 @@
     defaults: ["libcutils_test_default"],
     host_supported: true,
     shared_libs: test_libraries,
+    require_root: true,
 }
 
-cc_test {
-    name: "libcutils_test_static",
-    test_suites: ["device-tests"],
+cc_defaults {
+    name: "libcutils_test_static_defaults",
     defaults: ["libcutils_test_default"],
     static_libs: [
         "libc",
         "libcgrouprc_format",
     ] + test_libraries,
     stl: "libc++_static",
+    require_root: true,
 
     target: {
         android: {
@@ -267,3 +271,16 @@
         },
     },
 }
+
+cc_test {
+    name: "libcutils_test_static",
+    test_suites: ["device-tests"],
+    defaults: ["libcutils_test_static_defaults"],
+}
+
+cc_test {
+    name: "KernelLibcutilsTest",
+    test_suites: ["general-tests", "vts-core"],
+    defaults: ["libcutils_test_static_defaults"],
+    test_config: "KernelLibcutilsTest.xml",
+}
diff --git a/libmemunreachable/tests/AndroidTest.xml b/libcutils/KernelLibcutilsTest.xml
similarity index 65%
rename from libmemunreachable/tests/AndroidTest.xml
rename to libcutils/KernelLibcutilsTest.xml
index 604c0ec..e27fac6 100644
--- a/libmemunreachable/tests/AndroidTest.xml
+++ b/libcutils/KernelLibcutilsTest.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2017 The Android Open Source Project
+<!-- Copyright (C) 2020 The Android Open Source Project
 
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
@@ -13,14 +13,21 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<configuration description="Config for memunreachable_test">
+<configuration description="Runs libcutils_test_static.">
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-suite-tag" value="apct-native" />
+
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer">
+    </target_preparer>
+
     <target_preparer class="com.android.tradefed.targetprep.PushFilePreparer">
         <option name="cleanup" value="true" />
-        <option name="push" value="memunreachable_test->/data/local/tmp/memunreachable_test" />
+        <option name="push" value="libcutils_test_static->/data/local/tmp/libcutils_test_static" />
     </target_preparer>
-    <option name="test-suite-tag" value="apct" />
+
     <test class="com.android.tradefed.testtype.GTest" >
         <option name="native-test-device-path" value="/data/local/tmp" />
-        <option name="module-name" value="memunreachable_test" />
+        <option name="module-name" value="libcutils_test_static" />
+        <option name="include-filter" value="*AshmemTest*" />
     </test>
 </configuration>
diff --git a/libcutils/ashmem-dev.cpp b/libcutils/ashmem-dev.cpp
index 340572c..8c232f0 100644
--- a/libcutils/ashmem-dev.cpp
+++ b/libcutils/ashmem-dev.cpp
@@ -203,19 +203,23 @@
 {
     static const std::string ashmem_device_path = get_ashmem_device_path();
 
-    int ret;
-    struct stat st;
-
     if (ashmem_device_path.empty()) {
         return -1;
     }
 
     int fd = TEMP_FAILURE_RETRY(open(ashmem_device_path.c_str(), O_RDWR | O_CLOEXEC));
+
+    // fallback for APEX w/ use_vendor on Q, which would have still used /dev/ashmem
+    if (fd < 0) {
+        fd = TEMP_FAILURE_RETRY(open("/dev/ashmem", O_RDWR | O_CLOEXEC));
+    }
+
     if (fd < 0) {
         return fd;
     }
 
-    ret = TEMP_FAILURE_RETRY(fstat(fd, &st));
+    struct stat st;
+    int ret = TEMP_FAILURE_RETRY(fstat(fd, &st));
     if (ret < 0) {
         int save_errno = errno;
         close(fd);
diff --git a/libcutils/fs_config.cpp b/libcutils/fs_config.cpp
index 5fb11a5..c4e4f85 100644
--- a/libcutils/fs_config.cpp
+++ b/libcutils/fs_config.cpp
@@ -74,6 +74,8 @@
     { 00775, AID_MEDIA_RW,     AID_MEDIA_RW,     0, "data/media" },
     { 00750, AID_ROOT,         AID_SHELL,        0, "data/nativetest" },
     { 00750, AID_ROOT,         AID_SHELL,        0, "data/nativetest64" },
+    { 00750, AID_ROOT,         AID_SHELL,        0, "data/benchmarktest" },
+    { 00750, AID_ROOT,         AID_SHELL,        0, "data/benchmarktest64" },
     { 00775, AID_ROOT,         AID_ROOT,         0, "data/preloads" },
     { 00771, AID_SYSTEM,       AID_SYSTEM,       0, "data" },
     { 00755, AID_ROOT,         AID_SYSTEM,       0, "mnt" },
@@ -85,6 +87,8 @@
     { 00755, AID_ROOT,         AID_SHELL,        0, "system/vendor" },
     { 00751, AID_ROOT,         AID_SHELL,        0, "system/xbin" },
     { 00751, AID_ROOT,         AID_SHELL,        0, "system/apex/*/bin" },
+    { 00751, AID_ROOT,         AID_SHELL,        0, "system_ext/bin" },
+    { 00751, AID_ROOT,         AID_SHELL,        0, "system_ext/apex/*/bin" },
     { 00751, AID_ROOT,         AID_SHELL,        0, "vendor/bin" },
     { 00755, AID_ROOT,         AID_SHELL,        0, "vendor" },
     { 00755, AID_ROOT,         AID_ROOT,         0, 0 },
@@ -143,6 +147,8 @@
     { 00640, AID_ROOT,      AID_SHELL,     0, "data/nativetest64/tests.txt" },
     { 00750, AID_ROOT,      AID_SHELL,     0, "data/nativetest/*" },
     { 00750, AID_ROOT,      AID_SHELL,     0, "data/nativetest64/*" },
+    { 00750, AID_ROOT,      AID_SHELL,     0, "data/benchmarktest/*" },
+    { 00750, AID_ROOT,      AID_SHELL,     0, "data/benchmarktest64/*" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "default.prop" }, // legacy
     { 00600, AID_ROOT,      AID_ROOT,      0, "system/etc/prop.default" },
     { 00600, AID_ROOT,      AID_ROOT,      0, "odm/build.prop" }, // legacy; only for P release
@@ -194,10 +200,7 @@
     { 00750, AID_ROOT,      AID_SHELL,     CAP_MASK_LONG(CAP_SETUID) |
                                            CAP_MASK_LONG(CAP_SETGID),
                                               "system/bin/simpleperf_app_runner" },
-
-    // Support FIFO scheduling mode in SurfaceFlinger.
-    { 00755, AID_SYSTEM,    AID_GRAPHICS,  CAP_MASK_LONG(CAP_SYS_NICE),
-                                              "system/bin/surfaceflinger" },
+    { 00755, AID_ROOT,      AID_ROOT,      0, "first_stage_ramdisk/system/bin/e2fsck" },
     // generic defaults
     { 00755, AID_ROOT,      AID_ROOT,      0, "bin/*" },
     { 00640, AID_ROOT,      AID_SHELL,     0, "fstab.*" },
@@ -207,6 +210,8 @@
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/xbin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/apex/*/bin/*" },
+    { 00755, AID_ROOT,      AID_SHELL,     0, "system_ext/bin/*" },
+    { 00755, AID_ROOT,      AID_SHELL,     0, "system_ext/apex/*/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/xbin/*" },
     { 00644, AID_ROOT,      AID_ROOT,      0, 0 },
diff --git a/libcutils/fs_config_test.cpp b/libcutils/fs_config_test.cpp
index 9627152..c6684b4 100644
--- a/libcutils/fs_config_test.cpp
+++ b/libcutils/fs_config_test.cpp
@@ -46,7 +46,7 @@
         // clang-format off
     { true,  "system/lib",             "system/lib/hw",           true  },
     { true,  "vendor/lib",             "system/vendor/lib/hw",    true  },
-    { true,  "system/vendor/lib",      "vendor/lib/hw",           true  },
+    { true,  "system/vendor/lib",      "vendor/lib/hw",           false },
     { true,  "system/vendor/lib",      "system/vendor/lib/hw",    true  },
     { true,  "foo/*/bar/*",            "foo/1/bar/2",             true  },
     { true,  "foo/*/bar/*",            "foo/1/bar",               true  },
@@ -56,13 +56,14 @@
     { false, "vendor/bin/wifi",        "system/vendor/bin/wifi",  true  },
     { false, "vendor/bin/wifi",        "system/vendor/bin/wifi2", false },
     { false, "system/vendor/bin/wifi", "system/vendor/bin/wifi",  true, },
-    { false, "odm/bin/wifi",           "system/odm/bin/wifi",     true  },
-    { false, "oem/bin/wifi",           "system/oem/bin/wifi",     true  },
+    { false, "odm/bin/wifi",           "system/odm/bin/wifi",     false },
+    { false, "odm/bin/wifi",           "vendor/odm/bin/wifi",     true  },
+    { false, "oem/bin/wifi",           "system/oem/bin/wifi",     false },
     { false, "data/bin/wifi",          "system/data/bin/wifi",    false },
     { false, "system/bin/*",           "system/bin/wifi",         true  },
     { false, "vendor/bin/*",           "system/vendor/bin/wifi",  true  },
     { false, "system/bin/*",           "system/bin",              false },
-    { false, "system/vendor/bin/*",    "vendor/bin/wifi",         true  },
+    { false, "system/vendor/bin/*",    "vendor/bin/wifi",         false },
     { false, "foo/*/bar/*",            "foo/1/bar/2",             true  },
     { false, "foo/*/bar/*",            "foo/1/bar",               false },
     { false, "foo/*/bar/*",            "foo/1/bar/2/3",           true  },
diff --git a/libcutils/include/cutils/sockets.h b/libcutils/include/cutils/sockets.h
index 285f150..be21a8f 100644
--- a/libcutils/include/cutils/sockets.h
+++ b/libcutils/include/cutils/sockets.h
@@ -103,14 +103,6 @@
 int socket_close(cutils_socket_t sock);
 
 /*
- * Sets socket receive timeout using SO_RCVTIMEO. Setting |timeout_ms| to 0
- * disables receive timeouts.
- *
- * Return 0 on success.
- */
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms);
-
-/*
  * Returns the local port the socket is bound to or -1 on error.
  */
 int socket_get_local_port(cutils_socket_t sock);
diff --git a/libcutils/include/cutils/trace.h b/libcutils/include/cutils/trace.h
index 79b4b35..e12c32c 100644
--- a/libcutils/include/cutils/trace.h
+++ b/libcutils/include/cutils/trace.h
@@ -25,7 +25,6 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <unistd.h>
-
 #include <cutils/compiler.h>
 
 __BEGIN_DECLS
@@ -89,6 +88,12 @@
 #error ATRACE_TAG must be defined to be one of the tags defined in cutils/trace.h
 #endif
 
+// Set this to 0 to revert to the old Binder-based atrace implementation.
+// This is only here in case rollbacks do not apply cleanly.
+// TODO(fmayer): Remove this once we are confident this won't need to be
+// rolled back, no later than 2020-03-01.
+#define ATRACE_SHMEM 1
+
 /**
  * Opens the trace file for writing and reads the property for initial tags.
  * The atrace.tags.enableflags property sets the tags to trace.
@@ -116,11 +121,15 @@
  * prevent tracing within the Zygote process.
  */
 void atrace_set_tracing_enabled(bool enabled);
-
 /**
- * Flag indicating whether setup has been completed, initialized to 0.
- * Nonzero indicates setup has completed.
- * Note: This does NOT indicate whether or not setup was successful.
+ * If !ATRACE_SHMEM:
+ *   Flag indicating whether setup has been completed, initialized to 0.
+ *   Nonzero indicates setup has completed.
+ *   Note: This does NOT indicate whether or not setup was successful.
+ * If ATRACE_SHMEM:
+ *   This is always set to false. This forces code that uses an old version
+ *   of this header to always call into atrace_setup, in which we call
+ *   atrace_init unconditionally.
  */
 extern atomic_bool atrace_is_ready;
 
@@ -143,6 +152,12 @@
  * This can be explicitly run to avoid setup delay on first trace function.
  */
 #define ATRACE_INIT() atrace_init()
+#define ATRACE_GET_ENABLED_TAGS() atrace_get_enabled_tags()
+
+#if ATRACE_SHMEM
+void atrace_init();
+uint64_t atrace_get_enabled_tags();
+#else
 static inline void atrace_init()
 {
     if (CC_UNLIKELY(!atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
@@ -155,12 +170,12 @@
  * It can be used as a guard condition around more expensive trace calculations.
  * Every trace function calls this, which ensures atrace_init is run.
  */
-#define ATRACE_GET_ENABLED_TAGS() atrace_get_enabled_tags()
 static inline uint64_t atrace_get_enabled_tags()
 {
     atrace_init();
     return atrace_enabled_tags;
 }
+#endif
 
 /**
  * Test if a given tag is currently enabled.
diff --git a/libcutils/include/private/android_filesystem_config.h b/libcutils/include/private/android_filesystem_config.h
index e1e8230..a2d36ff 100644
--- a/libcutils/include/private/android_filesystem_config.h
+++ b/libcutils/include/private/android_filesystem_config.h
@@ -129,6 +129,10 @@
 #define AID_NETWORK_STACK 1073   /* network stack service */
 #define AID_GSID 1074            /* GSI service daemon */
 #define AID_FSVERITY_CERT 1075   /* fs-verity key ownership in keystore */
+#define AID_CREDSTORE 1076       /* identity credential manager service */
+#define AID_EXTERNAL_STORAGE 1077 /* Full external storage access including USB OTG volumes */
+#define AID_EXT_DATA_RW 1078      /* GID for app-private data directories on external storage */
+#define AID_EXT_OBB_RW 1079       /* GID for OBB directories on external storage */
 /* Changes to this file must be made in AOSP, *not* in internal branches. */
 
 #define AID_SHELL 2000 /* adb and debug shell user */
diff --git a/libcutils/include_vndk/cutils/log.h b/libcutils/include_vndk/cutils/log.h
deleted file mode 100644
index 21dc11e..0000000
--- a/libcutils/include_vndk/cutils/log.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*Special log.h file for VNDK linking modules*/
-/*
- * Copyright (C) 2005-2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
-*/
-#ifndef _LIBS_CUTIL_LOG_H
-#define _LIBS_CUTIL_LOG_H
-
-/* We do not know if developer wanted log/log.h or subset android/log.h */
-#include <log/log.h>
-
-#if defined(__GNUC__)
-#if defined( __clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-W#warnings"
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wpedantic"
-#elif (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR > 9))
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-W#warnings"
-#else
-#pragma GCC diagnostic push
-#pragma GCC diagnostic warning "-Wcpp"
-#endif
-#endif
-
-#warning "Deprecated: don't include cutils/log.h, use either android/log.h or log/log.h"
-
-#if defined(__GNUC__)
-#if defined( __clang__)
-#pragma clang diagnostic pop
-#endif
-#pragma GCC diagnostic pop
-#endif
-
-#endif /* _LIBS_CUTIL_LOG_H */
diff --git a/libcutils/include_vndk/cutils/log.h b/libcutils/include_vndk/cutils/log.h
new file mode 120000
index 0000000..b868d50
--- /dev/null
+++ b/libcutils/include_vndk/cutils/log.h
@@ -0,0 +1 @@
+../../include/cutils/log.h
\ No newline at end of file
diff --git a/libcutils/native_handle.cpp b/libcutils/native_handle.cpp
index b409e5b..5804ab1 100644
--- a/libcutils/native_handle.cpp
+++ b/libcutils/native_handle.cpp
@@ -81,6 +81,8 @@
 }
 
 int native_handle_close(const native_handle_t* h) {
+    if (!h) return 0;
+
     if (h->version != sizeof(native_handle_t)) return -EINVAL;
 
     int saved_errno = errno;
diff --git a/libmeminfo/vts/vts_meminfo_test.cpp b/libcutils/native_handle_test.cpp
similarity index 66%
rename from libmeminfo/vts/vts_meminfo_test.cpp
rename to libcutils/native_handle_test.cpp
index 3193c31..c1e2f0b 100644
--- a/libmeminfo/vts/vts_meminfo_test.cpp
+++ b/libcutils/native_handle_test.cpp
@@ -14,18 +14,14 @@
  * limitations under the License.
  */
 
+#include <cutils/native_handle.h>
+
 #include <gtest/gtest.h>
 
-#include <meminfo/procmeminfo.h>
-
-namespace android {
-namespace meminfo {
-
-// /proc/<pid>/smaps_rollup support is required.
-TEST(SmapsRollup, IsSupported) {
-    // Use init's pid for this test since it's the only known pid.
-    ASSERT_TRUE(IsSmapsRollupSupported(1));
+TEST(native_handle, native_handle_delete) {
+    ASSERT_EQ(0, native_handle_delete(nullptr));
 }
 
-}  // namespace meminfo
-}  // namespace android
+TEST(native_handle, native_handle_close) {
+    ASSERT_EQ(0, native_handle_close(nullptr));
+}
diff --git a/libcutils/sockets_test.cpp b/libcutils/sockets_test.cpp
index b762ac1..1fa40bc 100644
--- a/libcutils/sockets_test.cpp
+++ b/libcutils/sockets_test.cpp
@@ -73,25 +73,6 @@
     EXPECT_EQ(0, socket_close(client));
 }
 
-// Tests receive timeout. The timing verification logic must be very coarse to
-// make sure different systems can all pass these tests.
-void TestReceiveTimeout(cutils_socket_t sock) {
-    time_t start_time;
-    char buffer[32];
-
-    // Make sure a 20ms timeout completes in 1 second or less.
-    EXPECT_EQ(0, socket_set_receive_timeout(sock, 20));
-    start_time = time(nullptr);
-    EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0));
-    EXPECT_LE(difftime(time(nullptr), start_time), 1.0);
-
-    // Make sure a 1250ms timeout takes 1 second or more.
-    EXPECT_EQ(0, socket_set_receive_timeout(sock, 1250));
-    start_time = time(nullptr);
-    EXPECT_EQ(-1, recv(sock, buffer, sizeof(buffer), 0));
-    EXPECT_LE(1.0, difftime(time(nullptr), start_time));
-}
-
 // Tests socket_get_local_port().
 TEST(SocketsTest, TestGetLocalPort) {
     cutils_socket_t server;
@@ -157,32 +138,6 @@
     TestConnectedSockets(handler, client, SOCK_STREAM);
 }
 
-// Tests setting a receive timeout for UDP sockets.
-TEST(SocketsTest, TestUdpReceiveTimeout) {
-    cutils_socket_t sock = socket_inaddr_any_server(0, SOCK_DGRAM);
-    ASSERT_NE(INVALID_SOCKET, sock);
-
-    TestReceiveTimeout(sock);
-
-    EXPECT_EQ(0, socket_close(sock));
-}
-
-// Tests setting a receive timeout for TCP sockets.
-TEST(SocketsTest, TestTcpReceiveTimeout) {
-    cutils_socket_t server = socket_inaddr_any_server(0, SOCK_STREAM);
-    ASSERT_NE(INVALID_SOCKET, server);
-
-    cutils_socket_t client = socket_network_client(
-            "localhost", socket_get_local_port(server), SOCK_STREAM);
-    cutils_socket_t handler = accept(server, nullptr, nullptr);
-    EXPECT_EQ(0, socket_close(server));
-
-    TestReceiveTimeout(handler);
-
-    EXPECT_EQ(0, socket_close(client));
-    EXPECT_EQ(0, socket_close(handler));
-}
-
 // Tests socket_send_buffers() failure.
 TEST(SocketsTest, TestSocketSendBuffersFailure) {
     EXPECT_EQ(-1, socket_send_buffers(INVALID_SOCKET, nullptr, 0));
diff --git a/libcutils/sockets_unix.cpp b/libcutils/sockets_unix.cpp
index 6acdcd8..84663e6 100644
--- a/libcutils/sockets_unix.cpp
+++ b/libcutils/sockets_unix.cpp
@@ -31,13 +31,6 @@
     return close(sock);
 }
 
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) {
-    timeval tv;
-    tv.tv_sec = timeout_ms / 1000;
-    tv.tv_usec = (timeout_ms % 1000) * 1000;
-    return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
-}
-
 ssize_t socket_send_buffers(cutils_socket_t sock,
                             const cutils_socket_buffer_t* buffers,
                             size_t num_buffers) {
diff --git a/libcutils/sockets_windows.cpp b/libcutils/sockets_windows.cpp
index df14712..4adb796 100644
--- a/libcutils/sockets_windows.cpp
+++ b/libcutils/sockets_windows.cpp
@@ -54,11 +54,6 @@
     return closesocket(sock);
 }
 
-int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) {
-    return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
-                      reinterpret_cast<char*>(&timeout_ms), sizeof(timeout_ms));
-}
-
 ssize_t socket_send_buffers(cutils_socket_t sock,
                             const cutils_socket_buffer_t* buffers,
                             size_t num_buffers) {
diff --git a/libcutils/trace-container.cpp b/libcutils/trace-container.cpp
index d981f8f..f7eed48 100644
--- a/libcutils/trace-container.cpp
+++ b/libcutils/trace-container.cpp
@@ -39,6 +39,11 @@
 static pthread_mutex_t  atrace_enabling_mutex        = PTHREAD_MUTEX_INITIALIZER;
 static pthread_rwlock_t atrace_container_sock_rwlock = PTHREAD_RWLOCK_INITIALIZER;
 
+static void atrace_seq_number_changed(uint32_t, uint32_t seq_no) {
+    pthread_once(&atrace_once_control, atrace_init_once);
+    atomic_store_explicit(&last_sequence_number, seq_no, memory_order_relaxed);
+}
+
 static bool atrace_init_container_sock()
 {
     pthread_rwlock_wrlock(&atrace_container_sock_rwlock);
@@ -82,24 +87,28 @@
 
 static void atrace_init_once()
 {
-    atrace_marker_fd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
+    atrace_marker_fd = open("/sys/kernel/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
     if (atrace_marker_fd < 0) {
-        // We're in container, ftrace may be disabled. In such case, we use the
-        // socket to write trace event.
+        // try debugfs
+        atrace_marker_fd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
+        if (atrace_marker_fd < 0) {
+            // We're in container, ftrace may be disabled. In such case, we use the
+            // socket to write trace event.
 
-        // Protect the initialization of container socket from
-        // atrace_set_tracing_enabled.
-        pthread_mutex_lock(&atrace_enabling_mutex);
-        atrace_use_container_sock = true;
-        bool success = false;
-        if (atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
-            success = atrace_init_container_sock();
-        }
-        pthread_mutex_unlock(&atrace_enabling_mutex);
+            // Protect the initialization of container socket from
+            // atrace_set_tracing_enabled.
+            pthread_mutex_lock(&atrace_enabling_mutex);
+            atrace_use_container_sock = true;
+            bool success = false;
+            if (atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
+                success = atrace_init_container_sock();
+            }
+            pthread_mutex_unlock(&atrace_enabling_mutex);
 
-        if (!success) {
-            atrace_enabled_tags = 0;
-            goto done;
+            if (!success) {
+                atrace_enabled_tags = 0;
+                goto done;
+            }
         }
     }
     atrace_enabled_tags = atrace_get_property();
diff --git a/libcutils/trace-dev.cpp b/libcutils/trace-dev.cpp
index bff16c1..9ca1729 100644
--- a/libcutils/trace-dev.cpp
+++ b/libcutils/trace-dev.cpp
@@ -32,17 +32,48 @@
 {
     atrace_marker_fd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
     if (atrace_marker_fd == -1) {
+        atrace_marker_fd = open("/sys/kernel/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
+    }
+
+    if (atrace_marker_fd == -1) {
         ALOGE("Error opening trace file: %s (%d)", strerror(errno), errno);
         atrace_enabled_tags = 0;
     } else {
       atrace_enabled_tags = atrace_get_property();
     }
+#if !ATRACE_SHMEM
     atomic_store_explicit(&atrace_is_ready, true, memory_order_release);
+#endif
+}
+
+static void atrace_seq_number_changed(uint32_t prev_seq_no, uint32_t seq_no) {
+    if (!atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
+        return;
+    }
+
+    // Someone raced us.
+    if (!atomic_compare_exchange_strong(&last_sequence_number, &prev_seq_no, seq_no)) {
+        return;
+    }
+
+    if (CC_UNLIKELY(prev_seq_no == kSeqNoNotInit)) {
+#if defined(__BIONIC__)
+        const prop_info* new_pi = __system_property_find("debug.atrace.tags.enableflags");
+        if (new_pi) atrace_property_info = new_pi;
+#endif
+        pthread_once(&atrace_once_control, atrace_init_once);
+    }
+
+    atrace_update_tags();
 }
 
 void atrace_setup()
 {
+#if ATRACE_SHMEM
+    atrace_init();
+#else
     pthread_once(&atrace_once_control, atrace_init_once);
+#endif
 }
 
 void atrace_begin_body(const char* name)
diff --git a/libcutils/trace-dev.inc b/libcutils/trace-dev.inc
index e3da77b..a57a4c5 100644
--- a/libcutils/trace-dev.inc
+++ b/libcutils/trace-dev.inc
@@ -34,6 +34,11 @@
 #include <log/log.h>
 #include <log/log_properties.h>
 
+#if defined(__BIONIC__)
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+#endif
+
 /**
  * Maximum size of a message that can be logged to the trace buffer.
  * Note this message includes a tag, the pid, and the string given as the name.
@@ -41,12 +46,57 @@
  */
 #define ATRACE_MESSAGE_LENGTH 1024
 
-atomic_bool             atrace_is_ready      = ATOMIC_VAR_INIT(false);
-int                     atrace_marker_fd     = -1;
-uint64_t                atrace_enabled_tags  = ATRACE_TAG_NOT_READY;
-static bool             atrace_is_debuggable = false;
-static atomic_bool      atrace_is_enabled    = ATOMIC_VAR_INIT(true);
-static pthread_mutex_t  atrace_tags_mutex    = PTHREAD_MUTEX_INITIALIZER;
+constexpr uint32_t kSeqNoNotInit = static_cast<uint32_t>(-1);
+
+atomic_bool              atrace_is_ready      = ATOMIC_VAR_INIT(false);
+int                      atrace_marker_fd     = -1;
+uint64_t                 atrace_enabled_tags  = ATRACE_TAG_NOT_READY;
+static bool              atrace_is_debuggable = false;
+static atomic_bool       atrace_is_enabled    = ATOMIC_VAR_INIT(true);
+static pthread_mutex_t   atrace_tags_mutex    = PTHREAD_MUTEX_INITIALIZER;
+
+/**
+ * Sequence number of debug.atrace.tags.enableflags the last time the enabled
+ * tags were reloaded.
+ **/
+static _Atomic(uint32_t) last_sequence_number = ATOMIC_VAR_INIT(kSeqNoNotInit);
+
+#if defined(__BIONIC__)
+// All zero prop_info that has a sequence number of 0. This is easier than
+// depending on implementation details of the property implementation.
+//
+// prop_info is static_assert-ed to be 96 bytes, which cannot change due to
+// ABI compatibility.
+alignas(uint64_t) static char empty_pi[96];
+static const prop_info* atrace_property_info = reinterpret_cast<const prop_info*>(empty_pi);
+#endif
+
+#if ATRACE_SHMEM
+
+/**
+ * This is called when the sequence number of debug.atrace.tags.enableflags
+ * changes and we need to reload the enabled tags.
+ **/
+static void atrace_seq_number_changed(uint32_t prev_seq_no, uint32_t seq_no);
+
+void atrace_init() {
+#if defined(__BIONIC__)
+    uint32_t seq_no = __system_property_serial(atrace_property_info);  // Acquire semantics.
+#else
+    uint32_t seq_no = 0;
+#endif
+    uint32_t prev_seq_no = atomic_load_explicit(&last_sequence_number, memory_order_relaxed);
+    if (CC_UNLIKELY(seq_no != prev_seq_no)) {
+        atrace_seq_number_changed(prev_seq_no, seq_no);
+    }
+}
+
+uint64_t atrace_get_enabled_tags()
+{
+    atrace_init();
+    return atrace_enabled_tags;
+}
+#endif
 
 // Set whether this process is debuggable, which determines whether
 // application-level tracing is allowed when the ro.debuggable system property
@@ -136,7 +186,7 @@
 void atrace_update_tags()
 {
     uint64_t tags;
-    if (CC_UNLIKELY(atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
+    if (ATRACE_SHMEM || CC_UNLIKELY(atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
         if (atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
             tags = atrace_get_property();
             pthread_mutex_lock(&atrace_tags_mutex);
diff --git a/libcutils/trace-host.cpp b/libcutils/trace-host.cpp
index d47cc18..c21d0ee 100644
--- a/libcutils/trace-host.cpp
+++ b/libcutils/trace-host.cpp
@@ -30,3 +30,10 @@
 void atrace_async_end_body(const char* /*name*/, int32_t /*cookie*/) {}
 void atrace_int_body(const char* /*name*/, int32_t /*value*/) {}
 void atrace_int64_body(const char* /*name*/, int64_t /*value*/) {}
+#if ATRACE_SHMEM
+void atrace_init() {}
+uint64_t atrace_get_enabled_tags()
+{
+    return ATRACE_TAG_NOT_READY;
+}
+#endif
diff --git a/libcutils/uevent.cpp b/libcutils/uevent.cpp
index 721de7c..bf244d2 100644
--- a/libcutils/uevent.cpp
+++ b/libcutils/uevent.cpp
@@ -60,7 +60,7 @@
     struct ucred* cred;
 
     *uid = -1;
-    ssize_t n = recvmsg(socket, &hdr, 0);
+    ssize_t n = TEMP_FAILURE_RETRY(recvmsg(socket, &hdr, 0));
     if (n <= 0) {
         return n;
     }
diff --git a/libgrallocusage/Android.bp b/libgrallocusage/Android.bp
index d27feb9..ce0c3c8 100644
--- a/libgrallocusage/Android.bp
+++ b/libgrallocusage/Android.bp
@@ -20,12 +20,7 @@
         "-Werror",
     ],
     cppflags: [
-        "-Weverything",
-        "-Wno-c++98-compat-pedantic",
-        // Hide errors in headers we include
-        "-Wno-global-constructors",
-        "-Wno-exit-time-destructors",
-        "-Wno-padded",
+        "-Wextra",
     ],
     srcs: ["GrallocUsageConversion.cpp"],
     export_include_dirs: ["include"],
diff --git a/libion/Android.bp b/libion/Android.bp
deleted file mode 100644
index 2f73d92..0000000
--- a/libion/Android.bp
+++ /dev/null
@@ -1,29 +0,0 @@
-cc_library {
-    name: "libion",
-    vendor_available: true,
-    vndk: {
-        enabled: true,
-        support_system_process: true,
-    },
-    srcs: ["ion.c"],
-    shared_libs: ["liblog"],
-    local_include_dirs: [
-        "include",
-        "kernel-headers",
-    ],
-    export_include_dirs: [
-        "include",
-        "kernel-headers",
-    ],
-    cflags: ["-Werror"],
-}
-
-cc_binary {
-    name: "iontest",
-    srcs: ["ion_test.c"],
-    static_libs: ["libion"],
-    shared_libs: ["liblog"],
-    cflags: ["-Werror"],
-}
-
-subdirs = ["tests"]
diff --git a/libion/OWNERS b/libion/OWNERS
deleted file mode 100644
index 143ad2d..0000000
--- a/libion/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-sspatil@google.com
-hridya@google.com
diff --git a/libion/include/ion/ion.h b/libion/include/ion/ion.h
deleted file mode 100644
index 1480bd9..0000000
--- a/libion/include/ion/ion.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- *  ion.c
- *
- * Memory Allocator functions for ion
- *
- *   Copyright 2011 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef __SYS_CORE_ION_H
-#define __SYS_CORE_ION_H
-
-#include <sys/types.h>
-#include <linux/ion.h>
-
-__BEGIN_DECLS
-
-struct ion_handle;
-
-int ion_open();
-int ion_close(int fd);
-int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask,
-              unsigned int flags, ion_user_handle_t *handle);
-int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask,
-              unsigned int flags, int *handle_fd);
-int ion_sync_fd(int fd, int handle_fd);
-int ion_free(int fd, ion_user_handle_t handle);
-int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot,
-            int flags, off_t offset, unsigned char **ptr, int *map_fd);
-int ion_share(int fd, ion_user_handle_t handle, int *share_fd);
-int ion_import(int fd, int share_fd, ion_user_handle_t *handle);
-
-/**
-  * Add 4.12+ kernel ION interfaces here for forward compatibility
-  * This should be needed till the pre-4.12+ ION interfaces are backported.
-  */
-int ion_query_heap_cnt(int fd, int* cnt);
-int ion_query_get_heaps(int fd, int cnt, void* buffers);
-
-int ion_is_legacy(int fd);
-int ion_is_using_modular_heaps(int fd);
-
-__END_DECLS
-
-#endif /* __SYS_CORE_ION_H */
diff --git a/libion/ion.c b/libion/ion.c
deleted file mode 100644
index 07b4caf..0000000
--- a/libion/ion.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- *  ion.c
- *
- * Memory Allocator functions for ion
- *
- *   Copyright 2011 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-#define LOG_TAG "ion"
-
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/ion.h>
-#include <stdatomic.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <ion/ion.h>
-#include <linux/ion_4.19.h>
-
-#include <log/log.h>
-
-#define ION_ABI_VERSION_MODULAR_HEAPS 2
-
-enum ion_version { ION_VERSION_UNKNOWN, ION_VERSION_MODERN, ION_VERSION_LEGACY };
-
-static atomic_int g_ion_version = ATOMIC_VAR_INIT(ION_VERSION_UNKNOWN);
-
-int ion_is_legacy(int fd) {
-    int version = atomic_load_explicit(&g_ion_version, memory_order_acquire);
-    if (version == ION_VERSION_UNKNOWN) {
-        /**
-          * Check for FREE IOCTL here; it is available only in the old
-          * kernels, not the new ones.
-          */
-        int err = ion_free(fd, (ion_user_handle_t)NULL);
-        version = (err == -ENOTTY) ? ION_VERSION_MODERN : ION_VERSION_LEGACY;
-        atomic_store_explicit(&g_ion_version, version, memory_order_release);
-    }
-    return version == ION_VERSION_LEGACY;
-}
-
-int ion_open() {
-    int fd = open("/dev/ion", O_RDONLY | O_CLOEXEC);
-    if (fd < 0) ALOGE("open /dev/ion failed: %s", strerror(errno));
-
-    return fd;
-}
-
-int ion_close(int fd) {
-    int ret = close(fd);
-    if (ret < 0) return -errno;
-    return ret;
-}
-
-static int ion_ioctl(int fd, int req, void* arg) {
-    int ret = ioctl(fd, req, arg);
-    if (ret < 0) {
-        ALOGE("ioctl %x failed with code %d: %s", req, ret, strerror(errno));
-        return -errno;
-    }
-    return ret;
-}
-
-int ion_is_using_modular_heaps(int fd) {
-    int ion_abi_version = 0;
-    int ret = 0;
-
-    ret = ion_ioctl(fd, ION_IOC_ABI_VERSION, &ion_abi_version);
-    return (ret == 0 && ion_abi_version >= ION_ABI_VERSION_MODULAR_HEAPS);
-}
-
-int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask, unsigned int flags,
-              ion_user_handle_t* handle) {
-    int ret = 0;
-
-    if ((handle == NULL) || (!ion_is_legacy(fd))) return -EINVAL;
-
-    struct ion_allocation_data data = {
-        .len = len, .align = align, .heap_id_mask = heap_mask, .flags = flags,
-    };
-
-    ret = ion_ioctl(fd, ION_IOC_ALLOC, &data);
-    if (ret < 0) return ret;
-
-    *handle = data.handle;
-
-    return ret;
-}
-
-int ion_free(int fd, ion_user_handle_t handle) {
-    struct ion_handle_data data = {
-        .handle = handle,
-    };
-    return ion_ioctl(fd, ION_IOC_FREE, &data);
-}
-
-int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot, int flags, off_t offset,
-            unsigned char** ptr, int* map_fd) {
-    if (!ion_is_legacy(fd)) return -EINVAL;
-    int ret;
-    unsigned char* tmp_ptr;
-    struct ion_fd_data data = {
-        .handle = handle,
-    };
-
-    if (map_fd == NULL) return -EINVAL;
-    if (ptr == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_MAP, &data);
-    if (ret < 0) return ret;
-    if (data.fd < 0) {
-        ALOGE("map ioctl returned negative fd");
-        return -EINVAL;
-    }
-    tmp_ptr = mmap(NULL, length, prot, flags, data.fd, offset);
-    if (tmp_ptr == MAP_FAILED) {
-        ALOGE("mmap failed: %s", strerror(errno));
-        return -errno;
-    }
-    *map_fd = data.fd;
-    *ptr = tmp_ptr;
-    return ret;
-}
-
-int ion_share(int fd, ion_user_handle_t handle, int* share_fd) {
-    int ret;
-    struct ion_fd_data data = {
-        .handle = handle,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-    if (share_fd == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_SHARE, &data);
-    if (ret < 0) return ret;
-    if (data.fd < 0) {
-        ALOGE("share ioctl returned negative fd");
-        return -EINVAL;
-    }
-    *share_fd = data.fd;
-    return ret;
-}
-
-int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask, unsigned int flags,
-                 int* handle_fd) {
-    ion_user_handle_t handle;
-    int ret;
-
-    if (!handle_fd) return -EINVAL;
-
-    if (!ion_is_legacy(fd)) {
-        struct ion_new_allocation_data data = {
-            .len = len,
-            .heap_id_mask = heap_mask,
-            .flags = flags,
-        };
-
-        ret = ion_ioctl(fd, ION_IOC_NEW_ALLOC, &data);
-        if (ret < 0) return ret;
-        *handle_fd = data.fd;
-    } else {
-        ret = ion_alloc(fd, len, align, heap_mask, flags, &handle);
-        if (ret < 0) return ret;
-        ret = ion_share(fd, handle, handle_fd);
-        ion_free(fd, handle);
-    }
-    return ret;
-}
-
-int ion_import(int fd, int share_fd, ion_user_handle_t* handle) {
-    int ret;
-    struct ion_fd_data data = {
-        .fd = share_fd,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-
-    if (handle == NULL) return -EINVAL;
-
-    ret = ion_ioctl(fd, ION_IOC_IMPORT, &data);
-    if (ret < 0) return ret;
-    *handle = data.handle;
-    return ret;
-}
-
-int ion_sync_fd(int fd, int handle_fd) {
-    struct ion_fd_data data = {
-        .fd = handle_fd,
-    };
-
-    if (!ion_is_legacy(fd)) return -EINVAL;
-
-    return ion_ioctl(fd, ION_IOC_SYNC, &data);
-}
-
-int ion_query_heap_cnt(int fd, int* cnt) {
-    int ret;
-    struct ion_heap_query query;
-
-    if (!cnt) return -EINVAL;
-    memset(&query, 0, sizeof(query));
-
-    ret = ion_ioctl(fd, ION_IOC_HEAP_QUERY, &query);
-    if (ret < 0) return ret;
-
-    *cnt = query.cnt;
-    return ret;
-}
-
-int ion_query_get_heaps(int fd, int cnt, void* buffers) {
-    int ret;
-    struct ion_heap_query query = {
-        .cnt = cnt, .heaps = (uintptr_t)buffers,
-    };
-
-    ret = ion_ioctl(fd, ION_IOC_HEAP_QUERY, &query);
-    return ret;
-}
diff --git a/libion/ion_test.c b/libion/ion_test.c
deleted file mode 100644
index f3874ae..0000000
--- a/libion/ion_test.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- *   Copyright 2013 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/mman.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <ion/ion.h>
-#include <linux/ion.h>
-
-size_t len = 1024*1024, align = 0;
-int prot = PROT_READ | PROT_WRITE;
-int map_flags = MAP_SHARED;
-int alloc_flags = 0;
-int heap_mask = 1;
-int test = -1;
-size_t stride;
-
-int _ion_alloc_test(int *fd, ion_user_handle_t *handle)
-{
-    int ret;
-
-    *fd = ion_open();
-    if (*fd < 0)
-        return *fd;
-
-    ret = ion_alloc(*fd, len, align, heap_mask, alloc_flags, handle);
-
-    if (ret)
-        printf("%s failed: %s\n", __func__, strerror(ret));
-    return ret;
-}
-
-void ion_alloc_test()
-{
-    int fd, ret;
-    ion_user_handle_t handle;
-
-    if(_ion_alloc_test(&fd, &handle))
-        return;
-
-    ret = ion_free(fd, handle);
-    if (ret) {
-        printf("%s failed: %s %d\n", __func__, strerror(ret), handle);
-        return;
-    }
-    ion_close(fd);
-    printf("ion alloc test: passed\n");
-}
-
-void ion_map_test()
-{
-    int fd, map_fd, ret;
-    size_t i;
-    ion_user_handle_t handle;
-    unsigned char *ptr;
-
-    if(_ion_alloc_test(&fd, &handle))
-        return;
-
-    ret = ion_map(fd, handle, len, prot, map_flags, 0, &ptr, &map_fd);
-    if (ret)
-        return;
-
-    for (i = 0; i < len; i++) {
-        ptr[i] = (unsigned char)i;
-    }
-    for (i = 0; i < len; i++)
-        if (ptr[i] != (unsigned char)i)
-            printf("%s failed wrote %zu read %d from mapped "
-                   "memory\n", __func__, i, ptr[i]);
-    /* clean up properly */
-    ret = ion_free(fd, handle);
-    ion_close(fd);
-    munmap(ptr, len);
-    close(map_fd);
-
-    _ion_alloc_test(&fd, &handle);
-    close(fd);
-
-#if 0
-    munmap(ptr, len);
-    close(map_fd);
-    ion_close(fd);
-
-    _ion_alloc_test(len, align, flags, &fd, &handle);
-    close(map_fd);
-    ret = ion_map(fd, handle, len, prot, flags, 0, &ptr, &map_fd);
-    /* don't clean up */
-#endif
-}
-
-void ion_share_test()
-
-{
-    ion_user_handle_t handle;
-    int sd[2];
-    int num_fd = 1;
-    struct iovec count_vec = {
-        .iov_base = &num_fd,
-        .iov_len = sizeof num_fd,
-    };
-    char buf[CMSG_SPACE(sizeof(int))];
-    socketpair(AF_UNIX, SOCK_STREAM, 0, sd);
-    if (fork()) {
-        struct msghdr msg = {
-            .msg_control = buf,
-            .msg_controllen = sizeof buf,
-            .msg_iov = &count_vec,
-            .msg_iovlen = 1,
-        };
-
-        struct cmsghdr *cmsg;
-        int fd, share_fd, ret;
-        char *ptr;
-        /* parent */
-        if(_ion_alloc_test(&fd, &handle))
-            return;
-        ret = ion_share(fd, handle, &share_fd);
-        if (ret)
-            printf("share failed %s\n", strerror(errno));
-        ptr = mmap(NULL, len, prot, map_flags, share_fd, 0);
-        if (ptr == MAP_FAILED) {
-            return;
-        }
-        strcpy(ptr, "master");
-        cmsg = CMSG_FIRSTHDR(&msg);
-        cmsg->cmsg_level = SOL_SOCKET;
-        cmsg->cmsg_type = SCM_RIGHTS;
-        cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-        *(int *)CMSG_DATA(cmsg) = share_fd;
-        /* send the fd */
-        printf("master? [%10s] should be [master]\n", ptr);
-        printf("master sending msg 1\n");
-        sendmsg(sd[0], &msg, 0);
-        if (recvmsg(sd[0], &msg, 0) < 0)
-            perror("master recv msg 2");
-        printf("master? [%10s] should be [child]\n", ptr);
-
-        /* send ping */
-        sendmsg(sd[0], &msg, 0);
-        printf("master->master? [%10s]\n", ptr);
-        if (recvmsg(sd[0], &msg, 0) < 0)
-            perror("master recv 1");
-        close(fd);
-        _exit(0);
-    } else {
-        struct cmsghdr *cmsg;
-        char* ptr;
-        int fd, recv_fd;
-        char* child_buf[100];
-        /* child */
-        struct iovec count_vec = {
-            .iov_base = child_buf,
-            .iov_len = sizeof child_buf,
-        };
-
-        struct msghdr child_msg = {
-            .msg_control = buf,
-            .msg_controllen = sizeof buf,
-            .msg_iov = &count_vec,
-            .msg_iovlen = 1,
-        };
-
-        if (recvmsg(sd[1], &child_msg, 0) < 0)
-            perror("child recv msg 1");
-        cmsg = CMSG_FIRSTHDR(&child_msg);
-        if (cmsg == NULL) {
-            printf("no cmsg rcvd in child");
-            return;
-        }
-        recv_fd = *(int*)CMSG_DATA(cmsg);
-        if (recv_fd < 0) {
-            printf("could not get recv_fd from socket");
-            return;
-        }
-        printf("child %d\n", recv_fd);
-        fd = ion_open();
-        ptr = mmap(NULL, len, prot, map_flags, recv_fd, 0);
-        if (ptr == MAP_FAILED) {
-            return;
-        }
-        printf("child? [%10s] should be [master]\n", ptr);
-        strcpy(ptr, "child");
-        printf("child sending msg 2\n");
-        sendmsg(sd[1], &child_msg, 0);
-        close(fd);
-    }
-}
-
-int main(int argc, char* argv[]) {
-    int c;
-    enum tests {
-        ALLOC_TEST = 0, MAP_TEST, SHARE_TEST,
-    };
-
-    while (1) {
-        static struct option opts[] = {
-            {"alloc", no_argument, 0, 'a'},
-            {"alloc_flags", required_argument, 0, 'f'},
-            {"heap_mask", required_argument, 0, 'h'},
-            {"map", no_argument, 0, 'm'},
-            {"share", no_argument, 0, 's'},
-            {"len", required_argument, 0, 'l'},
-            {"align", required_argument, 0, 'g'},
-            {"map_flags", required_argument, 0, 'z'},
-            {"prot", required_argument, 0, 'p'},
-        };
-        int i = 0;
-        c = getopt_long(argc, argv, "af:h:l:mr:st", opts, &i);
-        if (c == -1)
-            break;
-
-        switch (c) {
-        case 'l':
-            len = atol(optarg);
-            break;
-        case 'g':
-            align = atol(optarg);
-            break;
-        case 'z':
-            map_flags = 0;
-            map_flags |= strstr(optarg, "PROT_EXEC") ? PROT_EXEC : 0;
-            map_flags |= strstr(optarg, "PROT_READ") ? PROT_READ: 0;
-            map_flags |= strstr(optarg, "PROT_WRITE") ? PROT_WRITE: 0;
-            map_flags |= strstr(optarg, "PROT_NONE") ? PROT_NONE: 0;
-            break;
-        case 'p':
-            prot = 0;
-            prot |= strstr(optarg, "MAP_PRIVATE") ? MAP_PRIVATE : 0;
-            prot |= strstr(optarg, "MAP_SHARED") ? MAP_SHARED : 0;
-            break;
-        case 'f':
-            alloc_flags = atol(optarg);
-            break;
-        case 'h':
-            heap_mask = atol(optarg);
-            break;
-        case 'a':
-            test = ALLOC_TEST;
-            break;
-        case 'm':
-            test = MAP_TEST;
-            break;
-        case 's':
-            test = SHARE_TEST;
-            break;
-        }
-    }
-    printf("test %d, len %zu, align %zu, map_flags %d, prot %d, heap_mask %d,"
-           " alloc_flags %d\n", test, len, align, map_flags, prot,
-           heap_mask, alloc_flags);
-    switch (test) {
-        case ALLOC_TEST:
-            ion_alloc_test();
-            break;
-        case MAP_TEST:
-            ion_map_test();
-            break;
-        case SHARE_TEST:
-            ion_share_test();
-            break;
-        default:
-            printf("must specify a test (alloc, map, share)\n");
-    }
-    return 0;
-}
diff --git a/libion/kernel-headers/linux/ion.h b/libion/kernel-headers/linux/ion.h
deleted file mode 100644
index 3c28080..0000000
--- a/libion/kernel-headers/linux/ion.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_H
-#define _UAPI_LINUX_ION_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-typedef int ion_user_handle_t;
-enum ion_heap_type {
- ION_HEAP_TYPE_SYSTEM,
- ION_HEAP_TYPE_SYSTEM_CONTIG,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ION_HEAP_TYPE_CARVEOUT,
- ION_HEAP_TYPE_CHUNK,
- ION_HEAP_TYPE_DMA,
- ION_HEAP_TYPE_CUSTOM,
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- ION_NUM_HEAPS = 16,
-};
-#define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM)
-#define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT)
-#define ION_HEAP_TYPE_DMA_MASK (1 << ION_HEAP_TYPE_DMA)
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-#define ION_FLAG_CACHED 1
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_FLAG_CACHED_NEEDS_SYNC 2
-struct ion_allocation_data {
- size_t len;
- size_t align;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int heap_id_mask;
- unsigned int flags;
- ion_user_handle_t handle;
-};
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_fd_data {
- ion_user_handle_t handle;
- int fd;
-};
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_handle_data {
- ion_user_handle_t handle;
-};
-struct ion_custom_data {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- unsigned int cmd;
- unsigned long arg;
-};
-#define ION_IOC_MAGIC 'I'
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0,   struct ion_allocation_data)
-#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
-#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
-#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
-#define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
-#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
-#endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libion/kernel-headers/linux/ion_4.12.h b/libion/kernel-headers/linux/ion_4.12.h
deleted file mode 100644
index 1af8284..0000000
--- a/libion/kernel-headers/linux/ion_4.12.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-struct ion_new_allocation_data {
-    __u64 len;
-    __u32 heap_id_mask;
-    __u32 flags;
-    __u32 fd;
-    __u32 unused;
-};
-#define MAX_HEAP_NAME 32
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-struct ion_heap_query {
-    __u32 cnt;
-    __u32 reserved0;
-    __u64 heaps;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-#define ION_IOC_MAGIC 'I'
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-#endif
diff --git a/libion/kernel-headers/linux/ion_4.19.h b/libion/kernel-headers/linux/ion_4.19.h
deleted file mode 100644
index f5b59f1..0000000
--- a/libion/kernel-headers/linux/ion_4.19.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-enum ion_heap_type_ext {
-    ION_HEAP_TYPE_CUSTOM_EXT = 16,
-    ION_HEAP_TYPE_MAX = 31,
-};
-enum ion_heap_id {
-    ION_HEAP_SYSTEM = (1 << ION_HEAP_TYPE_SYSTEM),
-    ION_HEAP_SYSTEM_CONTIG = (ION_HEAP_SYSTEM << 1),
-    ION_HEAP_CARVEOUT_START = (ION_HEAP_SYSTEM_CONTIG << 1),
-    ION_HEAP_CARVEOUT_END = (ION_HEAP_CARVEOUT_START << 4),
-    ION_HEAP_CHUNK = (ION_HEAP_CARVEOUT_END << 1),
-    ION_HEAP_DMA_START = (ION_HEAP_CHUNK << 1),
-    ION_HEAP_DMA_END = (ION_HEAP_DMA_START << 7),
-    ION_HEAP_CUSTOM_START = (ION_HEAP_DMA_END << 1),
-    ION_HEAP_CUSTOM_END = (ION_HEAP_CUSTOM_START << 15),
-};
-#define ION_NUM_MAX_HEAPS (32)
-struct ion_new_allocation_data {
-    __u64 len;
-    __u32 heap_id_mask;
-    __u32 flags;
-    __u32 fd;
-    __u32 unused;
-};
-#define MAX_HEAP_NAME 32
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-struct ion_heap_query {
-    __u32 cnt;
-    __u32 reserved0;
-    __u64 heaps;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-#define ION_IOC_MAGIC 'I'
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-#define ION_IOC_ABI_VERSION _IOR(ION_IOC_MAGIC, 9, __u32)
-#endif
diff --git a/libion/kernel-headers/linux/ion_test.h b/libion/kernel-headers/linux/ion_test.h
deleted file mode 100644
index 6f3e2a7..0000000
--- a/libion/kernel-headers/linux/ion_test.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/****************************************************************************
- ****************************************************************************
- ***
- ***   This header was automatically generated from a Linux kernel header
- ***   of the same name, to make information necessary for userspace to
- ***   call into the kernel available to libc.  It contains only constants,
- ***   structures, and macros generated from the original header, and thus,
- ***   contains no copyrightable information.
- ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
- ****************************************************************************
- ****************************************************************************/
-#ifndef _UAPI_LINUX_ION_TEST_H
-#define _UAPI_LINUX_ION_TEST_H
-#include <linux/ioctl.h>
-#include <linux/types.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-struct ion_test_rw_data {
- __u64 ptr;
- __u64 offset;
- __u64 size;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- int write;
- int __padding;
-};
-#define ION_IOC_MAGIC 'I'
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define ION_IOC_TEST_SET_FD   _IO(ION_IOC_MAGIC, 0xf0)
-#define ION_IOC_TEST_DMA_MAPPING   _IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
-#define ION_IOC_TEST_KERNEL_MAPPING   _IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
-#endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libion/original-kernel-headers/linux/ion.h b/libion/original-kernel-headers/linux/ion.h
deleted file mode 100644
index f09e7c1..0000000
--- a/libion/original-kernel-headers/linux/ion.h
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_H
-#define _UAPI_LINUX_ION_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-typedef int ion_user_handle_t;
-
-/**
- * enum ion_heap_types - list of all possible types of heaps
- * @ION_HEAP_TYPE_SYSTEM:	 memory allocated via vmalloc
- * @ION_HEAP_TYPE_SYSTEM_CONTIG: memory allocated via kmalloc
- * @ION_HEAP_TYPE_CARVEOUT:	 memory allocated from a prereserved
- * 				 carveout heap, allocations are physically
- * 				 contiguous
- * @ION_HEAP_TYPE_DMA:		 memory allocated via DMA API
- * @ION_NUM_HEAPS:		 helper for iterating over heaps, a bit mask
- * 				 is used to identify the heaps, so only 32
- * 				 total heap types are supported
- */
-enum ion_heap_type {
-	ION_HEAP_TYPE_SYSTEM,
-	ION_HEAP_TYPE_SYSTEM_CONTIG,
-	ION_HEAP_TYPE_CARVEOUT,
-	ION_HEAP_TYPE_CHUNK,
-	ION_HEAP_TYPE_DMA,
-	ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always
-				 are at the end of this enum */
-	ION_NUM_HEAPS = 16,
-};
-
-#define ION_HEAP_SYSTEM_MASK		(1 << ION_HEAP_TYPE_SYSTEM)
-#define ION_HEAP_SYSTEM_CONTIG_MASK	(1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
-#define ION_HEAP_CARVEOUT_MASK		(1 << ION_HEAP_TYPE_CARVEOUT)
-#define ION_HEAP_TYPE_DMA_MASK		(1 << ION_HEAP_TYPE_DMA)
-
-#define ION_NUM_HEAP_IDS		sizeof(unsigned int) * 8
-
-/**
- * allocation flags - the lower 16 bits are used by core ion, the upper 16
- * bits are reserved for use by the heaps themselves.
- */
-#define ION_FLAG_CACHED 1		/* mappings of this buffer should be
-					   cached, ion will do cache
-					   maintenance when the buffer is
-					   mapped for dma */
-#define ION_FLAG_CACHED_NEEDS_SYNC 2	/* mappings of this buffer will created
-					   at mmap time, if this is set
-					   caches must be managed manually */
-
-/**
- * DOC: Ion Userspace API
- *
- * create a client by opening /dev/ion
- * most operations handled via following ioctls
- *
- */
-
-/**
- * struct ion_allocation_data - metadata passed from userspace for allocations
- * @len:		size of the allocation
- * @align:		required alignment of the allocation
- * @heap_id_mask:	mask of heap ids to allocate from
- * @flags:		flags passed to heap
- * @handle:		pointer that will be populated with a cookie to use to 
- *			refer to this allocation
- *
- * Provided by userspace as an argument to the ioctl
- */
-struct ion_allocation_data {
-	size_t len;
-	size_t align;
-	unsigned int heap_id_mask;
-	unsigned int flags;
-	ion_user_handle_t handle;
-};
-
-/**
- * struct ion_fd_data - metadata passed to/from userspace for a handle/fd pair
- * @handle:	a handle
- * @fd:		a file descriptor representing that handle
- *
- * For ION_IOC_SHARE or ION_IOC_MAP userspace populates the handle field with
- * the handle returned from ion alloc, and the kernel returns the file
- * descriptor to share or map in the fd field.  For ION_IOC_IMPORT, userspace
- * provides the file descriptor and the kernel returns the handle.
- */
-struct ion_fd_data {
-	ion_user_handle_t handle;
-	int fd;
-};
-
-/**
- * struct ion_handle_data - a handle passed to/from the kernel
- * @handle:	a handle
- */
-struct ion_handle_data {
-	ion_user_handle_t handle;
-};
-
-/**
- * struct ion_custom_data - metadata passed to/from userspace for a custom ioctl
- * @cmd:	the custom ioctl function to call
- * @arg:	additional data to pass to the custom ioctl, typically a user
- *		pointer to a predefined structure
- *
- * This works just like the regular cmd and arg fields of an ioctl.
- */
-struct ion_custom_data {
-	unsigned int cmd;
-	unsigned long arg;
-};
-
-#define ION_IOC_MAGIC		'I'
-
-/**
- * DOC: ION_IOC_ALLOC - allocate memory
- *
- * Takes an ion_allocation_data struct and returns it with the handle field
- * populated with the opaque handle for the allocation.
- */
-#define ION_IOC_ALLOC		_IOWR(ION_IOC_MAGIC, 0, \
-				      struct ion_allocation_data)
-
-/**
- * DOC: ION_IOC_FREE - free memory
- *
- * Takes an ion_handle_data struct and frees the handle.
- */
-#define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
-
-/**
- * DOC: ION_IOC_MAP - get a file descriptor to mmap
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be used as an argument to mmap.
- */
-#define ION_IOC_MAP		_IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be passed to another process.  The corresponding opaque handle can
- * be retrieved via ION_IOC_IMPORT.
- */
-#define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_IMPORT - imports a shared file descriptor
- *
- * Takes an ion_fd_data struct with the fd field populated with a valid file
- * descriptor obtained from ION_IOC_SHARE and returns the struct with the handle
- * filed set to the corresponding opaque handle.
- */
-#define ION_IOC_IMPORT		_IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_SYNC - syncs a shared file descriptors to memory
- *
- * Deprecated in favor of using the dma_buf api's correctly (syncing
- * will happend automatically when the buffer is mapped to a device).
- * If necessary should be used after touching a cached buffer from the cpu,
- * this will make the buffer in memory coherent.
- */
-#define ION_IOC_SYNC		_IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data)
-
-/**
- * DOC: ION_IOC_CUSTOM - call architecture specific ion ioctl
- *
- * Takes the argument of the architecture specific ioctl to call and
- * passes appropriate userdata for that ioctl
- */
-#define ION_IOC_CUSTOM		_IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
-
-#endif /* _UAPI_LINUX_ION_H */
diff --git a/libion/original-kernel-headers/linux/ion_4.12.h b/libion/original-kernel-headers/linux/ion_4.12.h
deleted file mode 100644
index 6ae79d4..0000000
--- a/libion/original-kernel-headers/linux/ion_4.12.h
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Adapted from drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-
-/**
- * DOC: Ion Userspace API
- *
- * create a client by opening /dev/ion
- * most operations handled via following ioctls
- *
- */
-
-/**
- * struct ion_new_allocation_data - metadata passed from userspace for allocations
- * @len:		size of the allocation
- * @heap_id_mask:	mask of heap ids to allocate from
- * @flags:		flags passed to heap
- * @handle:		pointer that will be populated with a cookie to use to
- *			refer to this allocation
- *
- * Provided by userspace as an argument to the ioctl - added _new to denote
- * this belongs to the new ION interface.
- */
-struct ion_new_allocation_data {
-    __u64 len;
-    __u32 heap_id_mask;
-    __u32 flags;
-    __u32 fd;
-    __u32 unused;
-};
-
-#define MAX_HEAP_NAME 32
-
-/**
- * struct ion_heap_data - data about a heap
- * @name - first 32 characters of the heap name
- * @type - heap type
- * @heap_id - heap id for the heap
- */
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-/**
- * struct ion_heap_query - collection of data about all heaps
- * @cnt - total number of heaps to be copied
- * @heaps - buffer to copy heap data
- */
-struct ion_heap_query {
-    __u32 cnt;       /* Total number of heaps to be copied */
-    __u32 reserved0; /* align to 64bits */
-    __u64 heaps;     /* buffer to be populated */
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-#define ION_IOC_MAGIC 'I'
-
-/**
- * DOC: ION_IOC_NEW_ALLOC - allocate memory
- *
- * Takes an ion_allocation_data struct and returns it with the handle field
- * populated with the opaque handle for the allocation.
- * TODO: This IOCTL will clash by design; however, only one of
- *  ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised,
- *  so this should not conflict.
- */
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-
-/**
- * DOC: ION_IOC_FREE - free memory
- *
- * Takes an ion_handle_data struct and frees the handle.
- *
- * #define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be passed to another process.  The corresponding opaque handle can
- * be retrieved via ION_IOC_IMPORT.
- *
- * #define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_HEAP_QUERY - information about available heaps
- *
- * Takes an ion_heap_query structure and populates information about
- * available Ion heaps.
- */
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-
-#endif /* _UAPI_LINUX_ION_NEW_H */
diff --git a/libion/original-kernel-headers/linux/ion_4.19.h b/libion/original-kernel-headers/linux/ion_4.19.h
deleted file mode 100644
index 75fef39..0000000
--- a/libion/original-kernel-headers/linux/ion_4.19.h
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * Adapted from drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2019 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_NEW_H
-#define _UAPI_LINUX_ION_NEW_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8)
-
-enum ion_heap_type_ext {
-    ION_HEAP_TYPE_CUSTOM_EXT = 16,
-    ION_HEAP_TYPE_MAX = 31,
-};
-
-/**
- * ion_heap_id - list of standard heap ids that Android can use
- *
- * @ION_HEAP_SYSTEM		Id for the ION_HEAP_TYPE_SYSTEM
- * @ION_HEAP_SYSTEM_CONTIG	Id for the ION_HEAP_TYPE_SYSTEM_CONTIG
- * @ION_HEAP_CHUNK		Id for the ION_HEAP_TYPE_CHUNK
- * @ION_HEAP_CARVEOUT_START	Start of reserved id range for heaps of type
- *				ION_HEAP_TYPE_CARVEOUT
- * @ION_HEAP_CARVEOUT_END	End of reserved id range for heaps of type
- *				ION_HEAP_TYPE_CARVEOUT
- * @ION_HEAP_DMA_START 		Start of reserved id range for heaps of type
- *				ION_HEAP_TYPE_DMA
- * @ION_HEAP_DMA_END		End of reserved id range for heaps of type
- *				ION_HEAP_TYPE_DMA
- * @ION_HEAP_CUSTOM_START	Start of reserved id range for heaps of custom
- *				type
- * @ION_HEAP_CUSTOM_END		End of reserved id range for heaps of custom
- *				type
- */
-enum ion_heap_id {
-    ION_HEAP_SYSTEM = (1 << ION_HEAP_TYPE_SYSTEM),
-    ION_HEAP_SYSTEM_CONTIG = (ION_HEAP_SYSTEM << 1),
-    ION_HEAP_CARVEOUT_START = (ION_HEAP_SYSTEM_CONTIG << 1),
-    ION_HEAP_CARVEOUT_END = (ION_HEAP_CARVEOUT_START << 4),
-    ION_HEAP_CHUNK = (ION_HEAP_CARVEOUT_END << 1),
-    ION_HEAP_DMA_START = (ION_HEAP_CHUNK << 1),
-    ION_HEAP_DMA_END = (ION_HEAP_DMA_START << 7),
-    ION_HEAP_CUSTOM_START = (ION_HEAP_DMA_END << 1),
-    ION_HEAP_CUSTOM_END = (ION_HEAP_CUSTOM_START << 15),
-};
-
-#define ION_NUM_MAX_HEAPS (32)
-
-/**
- * DOC: Ion Userspace API
- *
- * create a client by opening /dev/ion
- * most operations handled via following ioctls
- *
- */
-
-/**
- * struct ion_new_allocation_data - metadata passed from userspace for allocations
- * @len:		size of the allocation
- * @heap_id_mask:	mask of heap ids to allocate from
- * @flags:		flags passed to heap
- * @handle:		pointer that will be populated with a cookie to use to
- *			refer to this allocation
- *
- * Provided by userspace as an argument to the ioctl - added _new to denote
- * this belongs to the new ION interface.
- */
-struct ion_new_allocation_data {
-    __u64 len;
-    __u32 heap_id_mask;
-    __u32 flags;
-    __u32 fd;
-    __u32 unused;
-};
-
-#define MAX_HEAP_NAME 32
-
-/**
- * struct ion_heap_data - data about a heap
- * @name - first 32 characters of the heap name
- * @type - heap type
- * @heap_id - heap id for the heap
- */
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-/**
- * struct ion_heap_query - collection of data about all heaps
- * @cnt - total number of heaps to be copied
- * @heaps - buffer to copy heap data
- */
-struct ion_heap_query {
-    __u32 cnt;       /* Total number of heaps to be copied */
-    __u32 reserved0; /* align to 64bits */
-    __u64 heaps;     /* buffer to be populated */
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-#define ION_IOC_MAGIC 'I'
-
-/**
- * DOC: ION_IOC_NEW_ALLOC - allocate memory
- *
- * Takes an ion_allocation_data struct and returns it with the handle field
- * populated with the opaque handle for the allocation.
- * TODO: This IOCTL will clash by design; however, only one of
- *  ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised,
- *  so this should not conflict.
- */
-#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data)
-
-/**
- * DOC: ION_IOC_FREE - free memory
- *
- * Takes an ion_handle_data struct and frees the handle.
- *
- * #define ION_IOC_FREE		_IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation
- *
- * Takes an ion_fd_data struct with the handle field populated with a valid
- * opaque handle.  Returns the struct with the fd field set to a file
- * descriptor open in the current address space.  This file descriptor
- * can then be passed to another process.  The corresponding opaque handle can
- * be retrieved via ION_IOC_IMPORT.
- *
- * #define ION_IOC_SHARE		_IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
- * This will come from the older kernels, so don't redefine here
- */
-
-/**
- * DOC: ION_IOC_HEAP_QUERY - information about available heaps
- *
- * Takes an ion_heap_query structure and populates information about
- * available Ion heaps.
- */
-#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query)
-
-/**
- * DOC: ION_IOC_HEAP_ABI_VERSION - return ABI version
- *
- * Returns ABI version for this driver
- */
-#define ION_IOC_ABI_VERSION _IOR(ION_IOC_MAGIC, 9, __u32)
-
-#endif /* _UAPI_LINUX_ION_NEW_H */
diff --git a/libion/original-kernel-headers/linux/ion_test.h b/libion/original-kernel-headers/linux/ion_test.h
deleted file mode 100644
index ffef06f..0000000
--- a/libion/original-kernel-headers/linux/ion_test.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * drivers/staging/android/uapi/ion.h
- *
- * Copyright (C) 2011 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _UAPI_LINUX_ION_TEST_H
-#define _UAPI_LINUX_ION_TEST_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-/**
- * struct ion_test_rw_data - metadata passed to the kernel to read handle
- * @ptr:	a pointer to an area at least as large as size
- * @offset:	offset into the ion buffer to start reading
- * @size:	size to read or write
- * @write:	1 to write, 0 to read
- */
-struct ion_test_rw_data {
-	__u64 ptr;
-	__u64 offset;
-	__u64 size;
-	int write;
-	int __padding;
-};
-
-#define ION_IOC_MAGIC		'I'
-
-/**
- * DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver
- *
- * Attaches a dma buf fd to the test driver.  Passing a second fd or -1 will
- * release the first fd.
- */
-#define ION_IOC_TEST_SET_FD \
-			_IO(ION_IOC_MAGIC, 0xf0)
-
-/**
- * DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA
- *
- * Reads or writes the memory from a handle using an uncached mapping.  Can be
- * used by unit tests to emulate a DMA engine as close as possible.  Only
- * expected to be used for debugging and testing, may not always be available.
- */
-#define ION_IOC_TEST_DMA_MAPPING \
-			_IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
-
-/**
- * DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle
- *
- * Reads or writes the memory from a handle using a kernel mapping.  Can be
- * used by unit tests to test heap map_kernel functions.  Only expected to be
- * used for debugging and testing, may not always be available.
- */
-#define ION_IOC_TEST_KERNEL_MAPPING \
-			_IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
-
-
-#endif /* _UAPI_LINUX_ION_H */
diff --git a/libion/tests/Android.bp b/libion/tests/Android.bp
deleted file mode 100644
index 989e029..0000000
--- a/libion/tests/Android.bp
+++ /dev/null
@@ -1,34 +0,0 @@
-//
-// Copyright (C) 2013 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_test {
-    name: "ion-unit-tests",
-    cflags: [
-        "-g",
-        "-Wno-missing-field-initializers",
-    ],
-    shared_libs: ["libion"],
-    srcs: [
-        "allocate_test.cpp",
-        "exit_test.cpp",
-        "heap_query.cpp",
-        "system_heap.cpp",
-        "invalid_values_test.cpp",
-        "ion_test_fixture.cpp",
-        "map_test.cpp",
-        "modular_heap_check.cpp",
-    ],
-}
diff --git a/libion/tests/allocate_test.cpp b/libion/tests/allocate_test.cpp
deleted file mode 100644
index 5ed01bb..0000000
--- a/libion/tests/allocate_test.cpp
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <memory>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class Allocate : public IonTest {};
-
-TEST_F(Allocate, Allocate) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, AllocateCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), ION_FLAG_CACHED, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, AllocateCachedNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                      ION_FLAG_CACHED_NEEDS_SYNC, &fd));
-            ASSERT_TRUE(fd != 0);
-            ASSERT_EQ(close(fd), 0);  // free the buffer
-        }
-    }
-}
-
-TEST_F(Allocate, RepeatedAllocate) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int fd;
-
-            for (unsigned int i = 0; i < 1024; i++) {
-                SCOPED_TRACE(::testing::Message() << "iteration " << i);
-                ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &fd));
-                ASSERT_TRUE(fd != 0);
-                ASSERT_EQ(close(fd), 0);  // free the buffer
-            }
-        }
-    }
-}
-
-TEST_F(Allocate, Large) {
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int fd;
-        ASSERT_EQ(-ENOMEM,
-                  ion_alloc_fd(ionfd, 3UL * 1024 * 1024 * 1024, 0, (1 << heap.heap_id), 0, &fd));
-    }
-}
-
-// Make sure all heaps always return zeroed pages
-TEST_F(Allocate, Zeroed) {
-    auto zeroes_ptr = std::make_unique<char[]>(4096);
-
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int fds[16];
-        for (unsigned int i = 0; i < 16; i++) {
-            int map_fd = -1;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, 4096, 0, (1 << heap.heap_id), 0, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr = NULL;
-            ptr = mmap(NULL, 4096, PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-
-            memset(ptr, 0xaa, 4096);
-
-            ASSERT_EQ(0, munmap(ptr, 4096));
-            fds[i] = map_fd;
-        }
-
-        for (unsigned int i = 0; i < 16; i++) {
-            ASSERT_EQ(0, close(fds[i]));
-        }
-
-        int new_ionfd = ion_open();
-        int map_fd = -1;
-
-        ASSERT_EQ(0, ion_alloc_fd(new_ionfd, 4096, 0, (1 << heap.heap_id), 0, &map_fd));
-        ASSERT_GE(map_fd, 0);
-
-        void* ptr = NULL;
-        ptr = mmap(NULL, 4096, PROT_READ, MAP_SHARED, map_fd, 0);
-        ASSERT_TRUE(ptr != NULL);
-
-        ASSERT_EQ(0, memcmp(ptr, zeroes_ptr.get(), 4096));
-
-        ASSERT_EQ(0, munmap(ptr, 4096));
-        ASSERT_EQ(0, close(map_fd));
-        ASSERT_EQ(0, ion_close(new_ionfd));
-    }
-}
diff --git a/libion/tests/exit_test.cpp b/libion/tests/exit_test.cpp
deleted file mode 100644
index f312389..0000000
--- a/libion/tests/exit_test.cpp
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-
-#include "ion_test_fixture.h"
-
-class Exit : public IonTest {};
-
-TEST_F(Exit, WithAllocFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int handle_fd = -1;
-
-                        ASSERT_EQ(0,
-                                  ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &handle_fd));
-                        ASSERT_NE(-1, handle_fd);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithRepeatedAllocFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            for (unsigned int i = 0; i < 1024; i++) {
-                SCOPED_TRACE(::testing::Message()
-                             << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-                SCOPED_TRACE(::testing::Message() << "size " << size);
-                ASSERT_EXIT(
-                        {
-                            int handle_fd = -1;
-
-                            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0,
-                                                      &handle_fd));
-                            ASSERT_NE(-1, handle_fd);
-                            exit(0);
-                        },
-                        ::testing::ExitedWithCode(0), "")
-                        << "failed on heap " << heap.name << ":" << heap.type << ":" << heap.heap_id
-                        << " and size " << size << " on iteration " << i;
-            }
-        }
-    }
-}
-
-TEST_F(Exit, WithMapping) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMapping) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithMappingCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMappingCached) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED, &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithMappingNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC,
-                                                  &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
-
-TEST_F(Exit, WithPartialMappingNeedsSync) {
-    static const size_t allocationSizes[] = {64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            EXPECT_EXIT(
-                    {
-                        int map_fd = -1;
-
-                        ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id),
-                                                  ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC,
-                                                  &map_fd));
-                        ASSERT_GE(map_fd, 0);
-
-                        void* ptr;
-                        ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-                        ASSERT_TRUE(ptr != NULL);
-
-                        ASSERT_EQ(0, munmap(ptr, size / 2));
-                        exit(0);
-                    },
-                    ::testing::ExitedWithCode(0), "");
-        }
-    }
-}
diff --git a/libion/tests/heap_query.cpp b/libion/tests/heap_query.cpp
deleted file mode 100644
index fed8030..0000000
--- a/libion/tests/heap_query.cpp
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class HeapQuery : public IonTest {};
-
-TEST_F(HeapQuery, AtleastOneHeap) {
-    ASSERT_GT(ion_heaps.size(), 0);
-}
-
-// TODO: Adjust this test to account for the range of valid carveout and DMA heap ids.
-TEST_F(HeapQuery, HeapIdVerify) {
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message() << "Invalid id for heap:" << heap.name << ":" << heap.type
-                                          << ":" << heap.heap_id);
-        switch (heap.type) {
-            case ION_HEAP_TYPE_SYSTEM:
-                ASSERT_TRUE((1 << heap.heap_id) & ION_HEAP_SYSTEM_MASK);
-                break;
-            case ION_HEAP_TYPE_SYSTEM_CONTIG:
-                ASSERT_TRUE((1 << heap.heap_id) & ION_HEAP_SYSTEM_CONTIG_MASK);
-                break;
-            case ION_HEAP_TYPE_CARVEOUT:
-                ASSERT_TRUE((1 << heap.heap_id) & ION_HEAP_CARVEOUT_MASK);
-                break;
-            case ION_HEAP_TYPE_DMA:
-                ASSERT_TRUE((1 << heap.heap_id) & ION_HEAP_TYPE_DMA_MASK);
-                break;
-        }
-    }
-}
diff --git a/libion/tests/invalid_values_test.cpp b/libion/tests/invalid_values_test.cpp
deleted file mode 100644
index 48fcd72..0000000
--- a/libion/tests/invalid_values_test.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-
-#include <memory>
-#include <vector>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class InvalidValues : public IonTest {};
-
-TEST_F(InvalidValues, ion_close) {
-    EXPECT_EQ(-EBADF, ion_close(-1));
-}
-
-TEST_F(InvalidValues, ion_alloc_fd) {
-    int fd;
-    // no heaps
-    EXPECT_EQ(-ENODEV, ion_alloc_fd(ionfd, 4096, 0, 0, 0, &fd));
-    for (const auto& heap : ion_heaps) {
-        // invalid ion_fd
-        int ret = ion_alloc_fd(0, 4096, 0, (1 << heap.heap_id), 0, &fd);
-        EXPECT_TRUE(ret == -EINVAL || ret == -ENOTTY);
-        // invalid ion_fd
-        EXPECT_EQ(-EBADF, ion_alloc_fd(-1, 4096, 0, (1 << heap.heap_id), 0, &fd));
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        // zero size
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 0, 0, (1 << heap.heap_id), 0, &fd));
-        // too large size
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, -1, 0, (1 << heap.heap_id), 0, &fd));
-        // bad alignment
-        // TODO: Current userspace and kernel code completely ignores alignment. So this
-        // test is going to fail. We need to completely remove alignment from the API.
-        // All memory by default is always page aligned. OR actually pass the alignment
-        // down into the kernel and make kernel respect the alignment.
-        // EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 4096, -1, (1 << heap.heap_id), 0, &fd));
-
-        // NULL fd
-        EXPECT_EQ(-EINVAL, ion_alloc_fd(ionfd, 4096, 0, (1 << heap.heap_id), 0, nullptr));
-    }
-}
-
-TEST_F(InvalidValues, ion_query_heap_cnt) {
-    // NULL count
-    EXPECT_EQ(-EINVAL, ion_query_heap_cnt(ionfd, nullptr));
-
-    int heap_count;
-    // bad fd
-    EXPECT_EQ(-EBADF, ion_query_heap_cnt(-1, &heap_count));
-}
-
-TEST_F(InvalidValues, ion_query_get_heaps) {
-    int heap_count;
-    ASSERT_EQ(0, ion_query_heap_cnt(ionfd, &heap_count));
-    ASSERT_GT(heap_count, 0);
-
-    // nullptr buffers, still returns success but without
-    // the ion_heap_data.
-    EXPECT_EQ(0, ion_query_get_heaps(ionfd, heap_count, nullptr));
-
-    std::unique_ptr<struct ion_heap_data[]> heaps =
-            std::make_unique<struct ion_heap_data[]>(heap_count);
-    // bad fd
-    EXPECT_EQ(-EBADF, ion_query_get_heaps(-1, heap_count, heaps.get()));
-
-    // invalid heap data pointer
-    EXPECT_EQ(-EFAULT, ion_query_get_heaps(ionfd, heap_count, reinterpret_cast<void*>(0xdeadf00d)));
-}
diff --git a/libion/tests/ion_test_fixture.cpp b/libion/tests/ion_test_fixture.cpp
deleted file mode 100644
index 935fe5c..0000000
--- a/libion/tests/ion_test_fixture.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-#include <ion/ion.h>
-
-#include "ion_test_fixture.h"
-
-IonTest::IonTest() : ionfd(-1), ion_heaps() {}
-
-void IonTest::SetUp() {
-    ionfd = ion_open();
-    ASSERT_GE(ionfd, 0);
-
-    int heap_count;
-    int ret = ion_query_heap_cnt(ionfd, &heap_count);
-    ASSERT_EQ(ret, 0);
-    ASSERT_GT(heap_count, 0);
-
-    ion_heaps.resize(heap_count, {});
-    ret = ion_query_get_heaps(ionfd, heap_count, ion_heaps.data());
-    ASSERT_EQ(ret, 0);
-}
-
-void IonTest::TearDown() {
-    ion_close(ionfd);
-}
diff --git a/libion/tests/ion_test_fixture.h b/libion/tests/ion_test_fixture.h
deleted file mode 100644
index c78fe41..0000000
--- a/libion/tests/ion_test_fixture.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ION_TEST_FIXTURE_H_
-#define ION_TEST_FIXTURE_H_
-
-#include <gtest/gtest.h>
-#include <linux/ion_4.12.h>
-#include <vector>
-
-using ::testing::Test;
-
-class IonTest : public virtual Test {
-  public:
-    IonTest();
-    virtual ~IonTest(){};
-    virtual void SetUp();
-    virtual void TearDown();
-    int ionfd;
-    std::vector<struct ion_heap_data> ion_heaps;
-};
-
-#endif /* ION_TEST_FIXTURE_H_ */
diff --git a/libion/tests/map_test.cpp b/libion/tests/map_test.cpp
deleted file mode 100644
index f1b47b7..0000000
--- a/libion/tests/map_test.cpp
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class Map : public IonTest {};
-
-TEST_F(Map, MapFd) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), 0, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
-
-TEST_F(Map, MapOffset) {
-    for (const auto& heap : ion_heaps) {
-        SCOPED_TRACE(::testing::Message()
-                     << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-        int map_fd = -1;
-
-        ASSERT_EQ(0, ion_alloc_fd(ionfd, getpagesize() * 2, 0, (1 << heap.heap_id), 0, &map_fd));
-        ASSERT_GE(map_fd, 0);
-
-        unsigned char* ptr;
-        ptr = (unsigned char*)mmap(NULL, getpagesize() * 2, PROT_READ | PROT_WRITE, MAP_SHARED,
-                                   map_fd, 0);
-        ASSERT_TRUE(ptr != NULL);
-
-        memset(ptr, 0, getpagesize());
-        memset(ptr + getpagesize(), 0xaa, getpagesize());
-
-        ASSERT_EQ(0, munmap(ptr, getpagesize() * 2));
-
-        ptr = (unsigned char*)mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, map_fd,
-                                   getpagesize());
-        ASSERT_TRUE(ptr != NULL);
-        ASSERT_EQ(ptr[0], 0xaa);
-        ASSERT_EQ(ptr[getpagesize() - 1], 0xaa);
-        ASSERT_EQ(0, munmap(ptr, getpagesize()));
-        ASSERT_EQ(0, close(map_fd));
-    }
-}
-
-TEST_F(Map, MapCached) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-            unsigned int flags = ION_FLAG_CACHED;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), flags, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
-
-TEST_F(Map, MapCachedNeedsSync) {
-    static const size_t allocationSizes[] = {4 * 1024, 64 * 1024, 1024 * 1024, 2 * 1024 * 1024};
-    for (const auto& heap : ion_heaps) {
-        for (size_t size : allocationSizes) {
-            SCOPED_TRACE(::testing::Message()
-                         << "heap:" << heap.name << ":" << heap.type << ":" << heap.heap_id);
-            SCOPED_TRACE(::testing::Message() << "size " << size);
-            int map_fd = -1;
-            unsigned int flags = ION_FLAG_CACHED | ION_FLAG_CACHED_NEEDS_SYNC;
-
-            ASSERT_EQ(0, ion_alloc_fd(ionfd, size, 0, (1 << heap.heap_id), flags, &map_fd));
-            ASSERT_GE(map_fd, 0);
-
-            void* ptr;
-            ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, map_fd, 0);
-            ASSERT_TRUE(ptr != NULL);
-            ASSERT_EQ(0, close(map_fd));
-
-            memset(ptr, 0xaa, size);
-
-            ASSERT_EQ(0, munmap(ptr, size));
-        }
-    }
-}
diff --git a/libion/tests/modular_heap_check.cpp b/libion/tests/modular_heap_check.cpp
deleted file mode 100644
index 5505c5a..0000000
--- a/libion/tests/modular_heap_check.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class ModularHeapCheck : public IonTest {};
-
-TEST_F(ModularHeapCheck, ModularHeapCheckSimple) {
-    if (ion_is_using_modular_heaps(ionfd)) {
-        std::cout << "Heaps are modular." << std::endl;
-    } else {
-        std::cout << "Heaps are built-in." << std::endl;
-    }
-}
diff --git a/libion/tests/system_heap.cpp b/libion/tests/system_heap.cpp
deleted file mode 100644
index fb63888..0000000
--- a/libion/tests/system_heap.cpp
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-#include <iostream>
-
-#include <ion/ion.h>
-#include "ion_test_fixture.h"
-
-class SystemHeap : public IonTest {};
-
-TEST_F(SystemHeap, Presence) {
-    bool system_heap_found = false;
-    for (const auto& heap : ion_heaps) {
-        if (heap.type == ION_HEAP_TYPE_SYSTEM) {
-            system_heap_found = true;
-            EXPECT_TRUE((1 << heap.heap_id) & ION_HEAP_SYSTEM_MASK);
-        }
-    }
-    // We now expect the system heap to exist from Android
-    ASSERT_TRUE(system_heap_found);
-}
-
-TEST_F(SystemHeap, Allocate) {
-    int fd;
-    ASSERT_EQ(0, ion_alloc_fd(ionfd, getpagesize(), 0, ION_HEAP_SYSTEM_MASK, 0, &fd));
-    ASSERT_TRUE(fd != 0);
-    ASSERT_EQ(close(fd), 0);  // free the buffer
-}
diff --git a/liblog/Android.bp b/liblog/Android.bp
index c40c5ef..2cf60e0 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -17,20 +17,15 @@
 liblog_sources = [
     "log_event_list.cpp",
     "log_event_write.cpp",
-    "logger_lock.cpp",
     "logger_name.cpp",
     "logger_read.cpp",
     "logger_write.cpp",
     "logprint.cpp",
-]
-liblog_host_sources = [
-    "fake_log_device.cpp",
-    "fake_writer.cpp",
+    "properties.cpp",
 ]
 liblog_target_sources = [
     "event_tag_map.cpp",
     "log_time.cpp",
-    "properties.cpp",
     "pmsg_reader.cpp",
     "pmsg_writer.cpp",
     "logd_reader.cpp",
@@ -41,6 +36,7 @@
     name: "liblog_headers",
     host_supported: true,
     vendor_available: true,
+    ramdisk_available: true,
     recovery_available: true,
     native_bridge_supported: true,
     export_include_dirs: ["include"],
@@ -64,15 +60,12 @@
 cc_library {
     name: "liblog",
     host_supported: true,
+    ramdisk_available: true,
     recovery_available: true,
     native_bridge_supported: true,
     srcs: liblog_sources,
 
     target: {
-        host: {
-            srcs: liblog_host_sources,
-            cflags: ["-DFAKE_LOG_DEVICE=1"],
-        },
         android: {
             version_script: "liblog.map.txt",
             srcs: liblog_target_sources,
@@ -97,12 +90,20 @@
         },
     },
 
-    header_libs: ["liblog_headers"],
+    header_libs: [
+        "libbase_headers",
+        "liblog_headers",
+    ],
     export_header_lib_headers: ["liblog_headers"],
 
     stubs: {
         symbol_file: "liblog.map.txt",
-        versions: ["10000"],
+        versions: ["29", "30"],
+    },
+
+    // TODO(tomcherry): Renable this before release branch is cut
+    header_abi_checker: {
+        enabled: false,
     },
 
     cflags: [
diff --git a/liblog/README.protocol.md b/liblog/README.protocol.md
new file mode 100644
index 0000000..fef29c9
--- /dev/null
+++ b/liblog/README.protocol.md
@@ -0,0 +1,49 @@
+# liblog -> logd
+
+The data that liblog sends to logd is represented below.
+
+    struct {
+        android_log_header_t header;
+        union {
+           struct {
+                char     prio;
+                char     tag[...];
+                char     message[...];
+            } string;
+            struct {
+                android_event_header_t event_header;
+                android_event_*_t      payload[...];
+            } binary;
+        };
+    };
+
+The payload, excluding the header, has a max size of LOGGER_ENTRY_MAX_PAYLOAD.
+
+## header
+
+The header is added immediately before sending the log message to logd.
+
+## `string` payload
+
+The `string` part of the union is for normal buffers (main, system, radio, etc) and consists of a
+single character priority, followed by a variable length null terminated string for the tag, and
+finally a variable length null terminated string for the message.
+
+This payload is used for the `__android_log_buf_write()` family of functions.
+
+## `binary` payload
+
+The `binary` part of the union is for binary buffers (events, security, etc) and consists of an
+android_event_header_t struct followed by a variable number of android_event_*_t
+(android_event_list_t, android_event_int_t, etc) structs.
+
+If multiple android_event_*_t elements are present, then they must be in a list and the first
+element in payload must be an android_event_list_t.
+
+This payload is used for the `__android_log_bwrite()` family of functions. It is additionally used
+for `android_log_write_list()` and the related functions that manipulate event lists.
+
+# logd -> liblog
+
+logd sends a `logger_entry` struct to liblog followed by the payload. The payload is identical to
+the payloads defined above. The max size of the entire message from logd is LOGGER_ENTRY_MAX_LEN.
diff --git a/liblog/event_tag_map.cpp b/liblog/event_tag_map.cpp
index 22cf43b..51c5e60 100644
--- a/liblog/event_tag_map.cpp
+++ b/liblog/event_tag_map.cpp
@@ -36,7 +36,6 @@
 #include <utils/FastStrcmp.h>
 #include <utils/RWLock.h>
 
-#include "log_portability.h"
 #include "logd_reader.h"
 
 #define OUT_TAG "EventTagMap"
@@ -494,7 +493,7 @@
 
 // Cache miss, go to logd to acquire a public reference.
 // Because we lack access to a SHARED PUBLIC /dev/event-log-tags file map?
-static const TagFmt* __getEventTag(EventTagMap* map, unsigned int tag) {
+static const TagFmt* __getEventTag([[maybe_unused]] EventTagMap* map, unsigned int tag) {
   // call event tag service to arrange for a new tag
   char* buf = NULL;
   // Can not use android::base::StringPrintf, asprintf + free instead.
@@ -515,8 +514,9 @@
     } else {
       size = ret;
     }
+#ifdef __ANDROID__
     // Ask event log tag service for an existing entry
-    if (__send_log_msg(buf, size) >= 0) {
+    if (SendLogdControlMessage(buf, size) >= 0) {
       buf[size - 1] = '\0';
       char* ep;
       unsigned long val = strtoul(buf, &ep, 10);  // return size
@@ -529,6 +529,7 @@
         }
       }
     }
+#endif
     free(buf);
   }
   return NULL;
@@ -618,8 +619,9 @@
     } else {
       size = ret;
     }
+#ifdef __ANDROID__
     // Ask event log tag service for an allocation
-    if (__send_log_msg(buf, size) >= 0) {
+    if (SendLogdControlMessage(buf, size) >= 0) {
       buf[size - 1] = '\0';
       unsigned long val = strtoul(buf, &cp, 10);        // return size
       if ((buf != cp) && (val > 0) && (*cp == '\n')) {  // truncation OK
@@ -635,6 +637,7 @@
         }
       }
     }
+#endif
     free(buf);
   }
 
diff --git a/liblog/fake_log_device.cpp b/liblog/fake_log_device.cpp
deleted file mode 100644
index 428a482..0000000
--- a/liblog/fake_log_device.cpp
+++ /dev/null
@@ -1,669 +0,0 @@
-/*
- * Copyright (C) 2008-2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * Intercepts log messages intended for the Android log device.
- * Messages are printed to stderr.
- */
-
-#include "fake_log_device.h"
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#if !defined(_WIN32)
-#include <pthread.h>
-#endif
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <android/log.h>
-
-#include "log_portability.h"
-
-#define kMaxTagLen 16 /* from the long-dead utils/Log.cpp */
-
-#define kTagSetSize 16 /* arbitrary */
-
-#if 0
-#define TRACE(...) printf("fake_log_device: " __VA_ARGS__)
-#else
-#define TRACE(...) ((void)0)
-#endif
-
-/* from the long-dead utils/Log.cpp */
-typedef enum {
-  FORMAT_OFF = 0,
-  FORMAT_BRIEF,
-  FORMAT_PROCESS,
-  FORMAT_TAG,
-  FORMAT_THREAD,
-  FORMAT_RAW,
-  FORMAT_TIME,
-  FORMAT_THREADTIME,
-  FORMAT_LONG
-} LogFormat;
-
-/*
- * Log driver state.
- */
-typedef struct LogState {
-  /* the fake fd that's seen by the user */
-  int fakeFd;
-
-  /* a printable name for this fake device */
-  char debugName[sizeof("/dev/log/security")];
-
-  /* nonzero if this is a binary log */
-  int isBinary;
-
-  /* global minimum priority */
-  int globalMinPriority;
-
-  /* output format */
-  LogFormat outputFormat;
-
-  /* tags and priorities */
-  struct {
-    char tag[kMaxTagLen];
-    int minPriority;
-  } tagSet[kTagSetSize];
-} LogState;
-
-#if !defined(_WIN32)
-/*
- * Locking.  Since we're emulating a device, we need to be prepared
- * to have multiple callers at the same time.  This lock is used
- * to both protect the fd list and to prevent LogStates from being
- * freed out from under a user.
- */
-static pthread_mutex_t fakeLogDeviceLock = PTHREAD_MUTEX_INITIALIZER;
-
-static void lock() {
-  /*
-   * If we trigger a signal handler in the middle of locked activity and the
-   * signal handler logs a message, we could get into a deadlock state.
-   */
-  pthread_mutex_lock(&fakeLogDeviceLock);
-}
-
-static void unlock() {
-  pthread_mutex_unlock(&fakeLogDeviceLock);
-}
-
-#else  // !defined(_WIN32)
-
-#define lock() ((void)0)
-#define unlock() ((void)0)
-
-#endif  // !defined(_WIN32)
-
-/*
- * File descriptor management.
- */
-#define FAKE_FD_BASE 10000
-#define MAX_OPEN_LOGS 8
-static LogState openLogTable[MAX_OPEN_LOGS];
-
-/*
- * Allocate an fd and associate a new LogState with it.
- * The fd is available via the fakeFd field of the return value.
- */
-static LogState* createLogState() {
-  size_t i;
-
-  for (i = 0; i < (sizeof(openLogTable) / sizeof(openLogTable[0])); i++) {
-    if (openLogTable[i].fakeFd == 0) {
-      openLogTable[i].fakeFd = FAKE_FD_BASE + i;
-      return &openLogTable[i];
-    }
-  }
-  return NULL;
-}
-
-/*
- * Translate an fd to a LogState.
- */
-static LogState* fdToLogState(int fd) {
-  if (fd >= FAKE_FD_BASE && fd < FAKE_FD_BASE + MAX_OPEN_LOGS) {
-    return &openLogTable[fd - FAKE_FD_BASE];
-  }
-  return NULL;
-}
-
-/*
- * Unregister the fake fd and free the memory it pointed to.
- */
-static void deleteFakeFd(int fd) {
-  LogState* ls;
-
-  lock();
-
-  ls = fdToLogState(fd);
-  if (ls != NULL) {
-    memset(&openLogTable[fd - FAKE_FD_BASE], 0, sizeof(openLogTable[0]));
-  }
-
-  unlock();
-}
-
-/*
- * Configure logging based on ANDROID_LOG_TAGS environment variable.  We
- * need to parse a string that looks like
- *
- *   *:v jdwp:d dalvikvm:d dalvikvm-gc:i dalvikvmi:i
- *
- * The tag (or '*' for the global level) comes first, followed by a colon
- * and a letter indicating the minimum priority level we're expected to log.
- * This can be used to reveal or conceal logs with specific tags.
- *
- * We also want to check ANDROID_PRINTF_LOG to determine how the output
- * will look.
- */
-static void configureInitialState(const char* pathName, LogState* logState) {
-  static const int kDevLogLen = sizeof("/dev/log/") - 1;
-
-  strncpy(logState->debugName, pathName, sizeof(logState->debugName));
-  logState->debugName[sizeof(logState->debugName) - 1] = '\0';
-
-  /* identify binary logs */
-  if (!strcmp(pathName + kDevLogLen, "events") || !strcmp(pathName + kDevLogLen, "security")) {
-    logState->isBinary = 1;
-  }
-
-  /* global min priority defaults to "info" level */
-  logState->globalMinPriority = ANDROID_LOG_INFO;
-
-  /*
-   * This is based on the the long-dead utils/Log.cpp code.
-   */
-  const char* tags = getenv("ANDROID_LOG_TAGS");
-  TRACE("Found ANDROID_LOG_TAGS='%s'\n", tags);
-  if (tags != NULL) {
-    int entry = 0;
-
-    while (*tags != '\0') {
-      char tagName[kMaxTagLen];
-      int i, minPrio;
-
-      while (isspace(*tags)) tags++;
-
-      i = 0;
-      while (*tags != '\0' && !isspace(*tags) && *tags != ':' && i < kMaxTagLen) {
-        tagName[i++] = *tags++;
-      }
-      if (i == kMaxTagLen) {
-        TRACE("ERROR: env tag too long (%d chars max)\n", kMaxTagLen - 1);
-        return;
-      }
-      tagName[i] = '\0';
-
-      /* default priority, if there's no ":" part; also zero out '*' */
-      minPrio = ANDROID_LOG_VERBOSE;
-      if (tagName[0] == '*' && tagName[1] == '\0') {
-        minPrio = ANDROID_LOG_DEBUG;
-        tagName[0] = '\0';
-      }
-
-      if (*tags == ':') {
-        tags++;
-        if (*tags >= '0' && *tags <= '9') {
-          if (*tags >= ('0' + ANDROID_LOG_SILENT))
-            minPrio = ANDROID_LOG_VERBOSE;
-          else
-            minPrio = *tags - '\0';
-        } else {
-          switch (*tags) {
-            case 'v':
-              minPrio = ANDROID_LOG_VERBOSE;
-              break;
-            case 'd':
-              minPrio = ANDROID_LOG_DEBUG;
-              break;
-            case 'i':
-              minPrio = ANDROID_LOG_INFO;
-              break;
-            case 'w':
-              minPrio = ANDROID_LOG_WARN;
-              break;
-            case 'e':
-              minPrio = ANDROID_LOG_ERROR;
-              break;
-            case 'f':
-              minPrio = ANDROID_LOG_FATAL;
-              break;
-            case 's':
-              minPrio = ANDROID_LOG_SILENT;
-              break;
-            default:
-              minPrio = ANDROID_LOG_DEFAULT;
-              break;
-          }
-        }
-
-        tags++;
-        if (*tags != '\0' && !isspace(*tags)) {
-          TRACE("ERROR: garbage in tag env; expected whitespace\n");
-          TRACE("       env='%s'\n", tags);
-          return;
-        }
-      }
-
-      if (tagName[0] == 0) {
-        logState->globalMinPriority = minPrio;
-        TRACE("+++ global min prio %d\n", logState->globalMinPriority);
-      } else {
-        logState->tagSet[entry].minPriority = minPrio;
-        strcpy(logState->tagSet[entry].tag, tagName);
-        TRACE("+++ entry %d: %s:%d\n", entry, logState->tagSet[entry].tag,
-              logState->tagSet[entry].minPriority);
-        entry++;
-      }
-    }
-  }
-
-  /*
-   * Taken from the long-dead utils/Log.cpp
-   */
-  const char* fstr = getenv("ANDROID_PRINTF_LOG");
-  LogFormat format;
-  if (fstr == NULL) {
-    format = FORMAT_BRIEF;
-  } else {
-    if (strcmp(fstr, "brief") == 0)
-      format = FORMAT_BRIEF;
-    else if (strcmp(fstr, "process") == 0)
-      format = FORMAT_PROCESS;
-    else if (strcmp(fstr, "tag") == 0)
-      format = FORMAT_PROCESS;
-    else if (strcmp(fstr, "thread") == 0)
-      format = FORMAT_PROCESS;
-    else if (strcmp(fstr, "raw") == 0)
-      format = FORMAT_PROCESS;
-    else if (strcmp(fstr, "time") == 0)
-      format = FORMAT_PROCESS;
-    else if (strcmp(fstr, "long") == 0)
-      format = FORMAT_PROCESS;
-    else
-      format = (LogFormat)atoi(fstr);  // really?!
-  }
-
-  logState->outputFormat = format;
-}
-
-/*
- * Return a human-readable string for the priority level.  Always returns
- * a valid string.
- */
-static const char* getPriorityString(int priority) {
-  /* the first character of each string should be unique */
-  static const char* priorityStrings[] = {"Verbose", "Debug", "Info", "Warn", "Error", "Assert"};
-  int idx;
-
-  idx = (int)priority - (int)ANDROID_LOG_VERBOSE;
-  if (idx < 0 || idx >= (int)(sizeof(priorityStrings) / sizeof(priorityStrings[0])))
-    return "?unknown?";
-  return priorityStrings[idx];
-}
-
-#if defined(_WIN32)
-/*
- * WIN32 does not have writev().
- * Make up something to replace it.
- */
-static ssize_t fake_writev(int fd, const struct iovec* iov, int iovcnt) {
-  ssize_t result = 0;
-  const struct iovec* end = iov + iovcnt;
-  for (; iov < end; iov++) {
-    ssize_t w = write(fd, iov->iov_base, iov->iov_len);
-    if (w != (ssize_t)iov->iov_len) {
-      if (w < 0) return w;
-      return result + w;
-    }
-    result += w;
-  }
-  return result;
-}
-
-#define writev fake_writev
-#endif
-
-/*
- * Write a filtered log message to stderr.
- *
- * Log format parsing taken from the long-dead utils/Log.cpp.
- */
-static void showLog(LogState* state, int logPrio, const char* tag, const char* msg) {
-#if !defined(_WIN32)
-  struct tm tmBuf;
-#endif
-  struct tm* ptm;
-  char timeBuf[32];
-  char prefixBuf[128], suffixBuf[128];
-  char priChar;
-  time_t when;
-#if !defined(_WIN32)
-  pid_t pid, tid;
-#else
-  uint32_t pid, tid;
-#endif
-
-  TRACE("LOG %d: %s %s", logPrio, tag, msg);
-
-  priChar = getPriorityString(logPrio)[0];
-  when = time(NULL);
-  pid = tid = getpid();  // find gettid()?
-
-/*
- * Get the current date/time in pretty form
- *
- * It's often useful when examining a log with "less" to jump to
- * a specific point in the file by searching for the date/time stamp.
- * For this reason it's very annoying to have regexp meta characters
- * in the time stamp.  Don't use forward slashes, parenthesis,
- * brackets, asterisks, or other special chars here.
- */
-#if !defined(_WIN32)
-  ptm = localtime_r(&when, &tmBuf);
-#else
-  ptm = localtime(&when);
-#endif
-  // strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%d %H:%M:%S", ptm);
-  strftime(timeBuf, sizeof(timeBuf), "%m-%d %H:%M:%S", ptm);
-
-  /*
-   * Construct a buffer containing the log header and log message.
-   */
-  size_t prefixLen, suffixLen;
-
-  switch (state->outputFormat) {
-    case FORMAT_TAG:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%c/%-8s: ", priChar, tag);
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-    case FORMAT_PROCESS:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%c(%5d) ", priChar, pid);
-      suffixLen = snprintf(suffixBuf, sizeof(suffixBuf), "  (%s)\n", tag);
-      break;
-    case FORMAT_THREAD:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%c(%5d:%5d) ", priChar, pid, tid);
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-    case FORMAT_RAW:
-      prefixBuf[0] = 0;
-      prefixLen = 0;
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-    case FORMAT_TIME:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%s %-8s\n\t", timeBuf, tag);
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-    case FORMAT_THREADTIME:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%s %5d %5d %c %-8s \n\t", timeBuf, pid,
-                           tid, priChar, tag);
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-    case FORMAT_LONG:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "[ %s %5d:%5d %c/%-8s ]\n", timeBuf, pid,
-                           tid, priChar, tag);
-      strcpy(suffixBuf, "\n\n");
-      suffixLen = 2;
-      break;
-    default:
-      prefixLen = snprintf(prefixBuf, sizeof(prefixBuf), "%c/%-8s(%5d): ", priChar, tag, pid);
-      strcpy(suffixBuf, "\n");
-      suffixLen = 1;
-      break;
-  }
-
-  /*
-   * Figure out how many lines there will be.
-   */
-  const char* end = msg + strlen(msg);
-  size_t numLines = 0;
-  const char* p = msg;
-  while (p < end) {
-    if (*p++ == '\n') numLines++;
-  }
-  if (p > msg && *(p - 1) != '\n') {
-    numLines++;
-  }
-
-  /*
-   * Create an array of iovecs large enough to write all of
-   * the lines with a prefix and a suffix.
-   */
-  const size_t INLINE_VECS = 64;
-  const size_t MAX_LINES = ((size_t)~0) / (3 * sizeof(struct iovec*));
-  struct iovec stackVec[INLINE_VECS];
-  struct iovec* vec = stackVec;
-  size_t numVecs;
-
-  if (numLines > MAX_LINES) numLines = MAX_LINES;
-
-  numVecs = numLines * 3;  // 3 iovecs per line.
-  if (numVecs > INLINE_VECS) {
-    vec = (struct iovec*)malloc(sizeof(struct iovec) * numVecs);
-    if (vec == NULL) {
-      msg = "LOG: write failed, no memory";
-      numVecs = INLINE_VECS;
-      numLines = numVecs / 3;
-      vec = stackVec;
-    }
-  }
-
-  /*
-   * Fill in the iovec pointers.
-   */
-  p = msg;
-  struct iovec* v = vec;
-  int totalLen = 0;
-  while (numLines > 0 && p < end) {
-    if (prefixLen > 0) {
-      v->iov_base = prefixBuf;
-      v->iov_len = prefixLen;
-      totalLen += prefixLen;
-      v++;
-    }
-    const char* start = p;
-    while (p < end && *p != '\n') {
-      p++;
-    }
-    if ((p - start) > 0) {
-      v->iov_base = (void*)start;
-      v->iov_len = p - start;
-      totalLen += p - start;
-      v++;
-    }
-    if (*p == '\n') p++;
-    if (suffixLen > 0) {
-      v->iov_base = suffixBuf;
-      v->iov_len = suffixLen;
-      totalLen += suffixLen;
-      v++;
-    }
-    numLines -= 1;
-  }
-
-  /*
-   * Write the entire message to the log file with a single writev() call.
-   * We need to use this rather than a collection of printf()s on a FILE*
-   * because of multi-threading and multi-process issues.
-   *
-   * If the file was not opened with O_APPEND, this will produce interleaved
-   * output when called on the same file from multiple processes.
-   *
-   * If the file descriptor is actually a network socket, the writev()
-   * call may return with a partial write.  Putting the writev() call in
-   * a loop can result in interleaved data.  This can be alleviated
-   * somewhat by wrapping the writev call in the Mutex.
-   */
-
-  for (;;) {
-    int cc = writev(fileno(stderr), vec, v - vec);
-
-    if (cc == totalLen) break;
-
-    if (cc < 0) {
-      if (errno == EINTR) continue;
-
-      /* can't really log the failure; for now, throw out a stderr */
-      fprintf(stderr, "+++ LOG: write failed (errno=%d)\n", errno);
-      break;
-    } else {
-      /* shouldn't happen when writing to file or tty */
-      fprintf(stderr, "+++ LOG: write partial (%d of %d)\n", cc, totalLen);
-      break;
-    }
-  }
-
-  /* if we allocated storage for the iovecs, free it */
-  if (vec != stackVec) free(vec);
-}
-
-/*
- * Receive a log message.  We happen to know that "vector" has three parts:
- *
- *  priority (1 byte)
- *  tag (N bytes -- null-terminated ASCII string)
- *  message (N bytes -- null-terminated ASCII string)
- */
-ssize_t fakeLogWritev(int fd, const struct iovec* vector, int count) {
-  LogState* state;
-
-  /* Make sure that no-one frees the LogState while we're using it.
-   * Also guarantees that only one thread is in showLog() at a given
-   * time (if it matters).
-   */
-  lock();
-
-  state = fdToLogState(fd);
-  if (state == NULL) {
-    errno = EBADF;
-    unlock();
-    return -1;
-  }
-
-  if (state->isBinary) {
-    TRACE("%s: ignoring binary log\n", state->debugName);
-    unlock();
-    int len = 0;
-    for (int i = 0; i < count; ++i) {
-      len += vector[i].iov_len;
-    }
-    return len;
-  }
-
-  if (count != 3) {
-    TRACE("%s: writevLog with count=%d not expected\n", state->debugName, count);
-    unlock();
-    return -1;
-  }
-
-  /* pull out the three fields */
-  int logPrio = *(const char*)vector[0].iov_base;
-  const char* tag = (const char*)vector[1].iov_base;
-  const char* msg = (const char*)vector[2].iov_base;
-
-  /* see if this log tag is configured */
-  int i;
-  int minPrio = state->globalMinPriority;
-  for (i = 0; i < kTagSetSize; i++) {
-    if (state->tagSet[i].minPriority == ANDROID_LOG_UNKNOWN)
-      break; /* reached end of configured values */
-
-    if (strcmp(state->tagSet[i].tag, tag) == 0) {
-      minPrio = state->tagSet[i].minPriority;
-      break;
-    }
-  }
-
-  if (logPrio >= minPrio) {
-    showLog(state, logPrio, tag, msg);
-  }
-
-  unlock();
-  int len = 0;
-  for (i = 0; i < count; ++i) {
-    len += vector[i].iov_len;
-  }
-  return len;
-}
-
-/*
- * Free up our state and close the fake descriptor.
- *
- * The logger API has no means or need to 'stop' or 'close' using the logs,
- * and as such, there is no way for that 'stop' or 'close' to translate into
- * a close operation to the fake log handler. fakeLogClose is provided for
- * completeness only.
- *
- * We have no intention of adding a log close operation as it would complicate
- * every user of the logging API with no gain since the only valid place to
- * call is in the exit handler. Logging can continue in the exit handler to
- * help debug HOST tools ...
- */
-int fakeLogClose(int fd) {
-  deleteFakeFd(fd);
-  return 0;
-}
-
-/*
- * Open a log output device and return a fake fd.
- */
-int fakeLogOpen(const char* pathName) {
-  LogState* logState;
-  int fd = -1;
-
-  lock();
-
-  logState = createLogState();
-  if (logState != NULL) {
-    configureInitialState(pathName, logState);
-    fd = logState->fakeFd;
-  } else {
-    errno = ENFILE;
-  }
-
-  unlock();
-
-  return fd;
-}
-
-ssize_t __send_log_msg(char*, size_t) {
-  return -ENODEV;
-}
-
-int __android_log_is_loggable(int prio, const char*, int def) {
-  int logLevel = def;
-  return logLevel >= 0 && prio >= logLevel;
-}
-
-int __android_log_is_loggable_len(int prio, const char*, size_t, int def) {
-  int logLevel = def;
-  return logLevel >= 0 && prio >= logLevel;
-}
-
-int __android_log_is_debuggable() {
-  return 1;
-}
diff --git a/liblog/fake_log_device.h b/liblog/fake_log_device.h
deleted file mode 100644
index ce54db2..0000000
--- a/liblog/fake_log_device.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-
-#include "log_portability.h"
-#include "uio.h"
-
-struct iovec;
-
-__BEGIN_DECLS
-
-int fakeLogOpen(const char* pathName);
-int fakeLogClose(int fd);
-ssize_t fakeLogWritev(int fd, const struct iovec* vector, int count);
-
-ssize_t __send_log_msg(char*, size_t);
-int __android_log_is_loggable(int prio, const char*, int def);
-int __android_log_is_loggable_len(int prio, const char*, size_t, int def);
-int __android_log_is_debuggable();
-
-__END_DECLS
diff --git a/liblog/fake_writer.cpp b/liblog/fake_writer.cpp
deleted file mode 100644
index f1ddff1..0000000
--- a/liblog/fake_writer.cpp
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2007-2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <log/log.h>
-
-#include "fake_log_device.h"
-#include "log_portability.h"
-#include "logger.h"
-
-static int fakeAvailable(log_id_t);
-static int fakeOpen();
-static void fakeClose();
-static int fakeWrite(log_id_t log_id, struct timespec* ts, struct iovec* vec, size_t nr);
-
-static int logFds[(int)LOG_ID_MAX] = {-1, -1, -1, -1, -1, -1};
-
-struct android_log_transport_write fakeLoggerWrite = {
-    .name = "fake",
-    .logMask = 0,
-    .context.priv = &logFds,
-    .available = fakeAvailable,
-    .open = fakeOpen,
-    .close = fakeClose,
-    .write = fakeWrite,
-};
-
-static int fakeAvailable(log_id_t) {
-  return 0;
-}
-
-static int fakeOpen() {
-  int i;
-
-  for (i = 0; i < LOG_ID_MAX; i++) {
-    /*
-     * Known maximum size string, plus an 8 character margin to deal with
-     * possible independent changes to android_log_id_to_name().
-     */
-    char buf[sizeof("/dev/log_security") + 8];
-    if (logFds[i] >= 0) {
-      continue;
-    }
-    snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(static_cast<log_id_t>(i)));
-    logFds[i] = fakeLogOpen(buf);
-    if (logFds[i] < 0) {
-      fprintf(stderr, "fakeLogOpen(%s) failed\n", buf);
-    }
-  }
-  return 0;
-}
-
-static void fakeClose() {
-  int i;
-
-  for (i = 0; i < LOG_ID_MAX; i++) {
-    fakeLogClose(logFds[i]);
-    logFds[i] = -1;
-  }
-}
-
-static int fakeWrite(log_id_t log_id, struct timespec*, struct iovec* vec, size_t nr) {
-  ssize_t ret;
-  size_t i;
-  int logFd, len;
-
-  if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) {
-    return -EINVAL;
-  }
-
-  len = 0;
-  for (i = 0; i < nr; ++i) {
-    len += vec[i].iov_len;
-  }
-
-  if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
-    len = LOGGER_ENTRY_MAX_PAYLOAD;
-  }
-
-  logFd = logFds[(int)log_id];
-  ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr));
-  if (ret < 0) {
-    ret = -errno;
-  } else if (ret > len) {
-    ret = len;
-  }
-
-  return ret;
-}
diff --git a/liblog/include/android/log.h b/liblog/include/android/log.h
index 2e6210e..c84ddf7 100644
--- a/liblog/include/android/log.h
+++ b/liblog/include/android/log.h
@@ -55,6 +55,7 @@
  */
 
 #include <stdarg.h>
+#include <stddef.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -124,8 +125,6 @@
 void __android_log_assert(const char* cond, const char* tag, const char* fmt, ...)
     __attribute__((__noreturn__)) __attribute__((__format__(printf, 3, 4)));
 
-#ifndef log_id_t_defined
-#define log_id_t_defined
 /**
  * Identifies a specific log buffer for __android_log_buf_write()
  * and __android_log_buf_print().
@@ -152,7 +151,12 @@
 
   LOG_ID_MAX
 } log_id_t;
-#endif
+
+/**
+ * Let the logging function choose the best log target.
+ * This is not part of the enum since adding either -1 or 0xFFFFFFFF forces the enum to be signed or
+ * unsigned, which breaks unfortunately common arithmetic against LOG_ID_MIN and LOG_ID_MAX. */
+#define LOG_ID_DEFAULT -1
 
 /**
  * Writes the constant string `text` to the log buffer `id`,
@@ -173,6 +177,112 @@
 int __android_log_buf_print(int bufID, int prio, const char* tag, const char* fmt, ...)
     __attribute__((__format__(printf, 4, 5)));
 
+/**
+ * Logger data struct used for writing log messages to liblog via __android_log_write_logger_data()
+ * and sending log messages to user defined loggers specified in __android_log_set_logger().
+ */
+struct __android_logger_data {
+  size_t struct_size; /* Must be set to sizeof(__android_logger_data) and is used for versioning. */
+  int buffer_id;      /* log_id_t or -1 to represent 'default'. */
+  int priority;       /* android_LogPriority values. */
+  const char* tag;
+  const char* file;  /* Optional file name, may be set to nullptr. */
+  unsigned int line; /* Optional line number, ignore if file is nullptr. */
+};
+
+/**
+ * Writes the log message specified with logger_data and msg to the log.  logger_data includes
+ * additional file name and line number information that a logger may use.  logger_data is versioned
+ * for backwards compatibility.
+ * This assumes that loggability has already been checked through __android_log_is_loggable().
+ * Higher level logging libraries, such as libbase, first check loggability, then format their
+ * buffers, then pass the message to liblog via this function, and therefore we do not want to
+ * duplicate the loggability check here.
+ */
+void __android_log_write_logger_data(struct __android_logger_data* logger_data, const char* msg);
+
+/**
+ * Prototype for the 'logger' function that is called for every log message.
+ */
+typedef void (*__android_logger_function)(const struct __android_logger_data* logger_data,
+                                          const char* message);
+
+/**
+ * Sets a user defined logger function.  All log messages sent to liblog will be set to the
+ * function pointer specified by logger for processing.
+ */
+void __android_log_set_logger(__android_logger_function logger);
+
+/**
+ * Writes the log message to logd.  This is an __android_logger_function and can be provided to
+ * __android_log_set_logger().  It is the default logger when running liblog on a device.
+ */
+void __android_log_logd_logger(const struct __android_logger_data* logger_data, const char* msg);
+
+/**
+ * Writes the log message to stderr.  This is an __android_logger_function and can be provided to
+ * __android_log_set_logger().  It is the default logger when running liblog on host.
+ */
+void __android_log_stderr_logger(const struct __android_logger_data* logger_data,
+                                 const char* message);
+
+/**
+ * Prototype for the 'abort' function that is called when liblog will abort due to
+ * __android_log_assert() failures.
+ */
+typedef void (*__android_aborter_function)(const char* abort_message);
+
+/**
+ * Sets a user defined aborter function that is called for __android_log_assert() failures.
+ */
+void __android_log_set_aborter(__android_aborter_function aborter);
+
+/**
+ * Calls the stored aborter function.  This allows for other logging libraries to use the same
+ * aborter function by calling this function in liblog.
+ */
+void __android_log_call_aborter(const char* abort_message);
+
+/**
+ * Sets android_set_abort_message() on device then aborts().  This is the default aborter.
+ */
+void __android_log_default_aborter(const char* abort_message);
+
+/**
+ * Use the per-tag properties "log.tag.<tagname>" along with the minimum priority from
+ * __android_log_set_minimum_priority() to determine if a log message with a given prio and tag will
+ * be printed.  A non-zero result indicates yes, zero indicates false.
+ *
+ * If both a priority for a tag and a minimum priority are set by
+ * __android_log_set_minimum_priority(), then the lowest of the two values are to determine the
+ * minimum priority needed to log.  If only one is set, then that value is used to determine the
+ * minimum priority needed.  If none are set, then default_priority is used.
+ *
+ * prio is ANDROID_LOG_VERBOSE to ANDROID_LOG_FATAL.
+ */
+int __android_log_is_loggable(int prio, const char* tag, int default_prio);
+int __android_log_is_loggable_len(int prio, const char* tag, size_t len, int default_prio);
+
+/**
+ * Sets the minimum priority that will be logged for this process.
+ *
+ * This returns the previous set minimum priority, or ANDROID_LOG_DEFAULT if none was set.
+ */
+int __android_log_set_minimum_priority(int priority);
+
+/**
+ * Gets the minimum priority that will be logged for this process.  If none has been set by a
+ * previous __android_log_set_minimum_priority() call, this returns ANDROID_LOG_DEFAULT.
+ */
+int __android_log_get_minimum_priority();
+
+/**
+ * Sets the default tag if no tag is provided when writing a log message.  Defaults to
+ * getprogname().  This truncates tag to the maximum log message size, though appropriate tags
+ * should be much smaller.
+ */
+void __android_log_set_default_tag(const char* tag);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/liblog/include/log/log_id.h b/liblog/include/log/log_id.h
index 4c6d809..c8fafe7 100644
--- a/liblog/include/log/log_id.h
+++ b/liblog/include/log/log_id.h
@@ -16,30 +16,12 @@
 
 #pragma once
 
+#include <android/log.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#ifndef log_id_t_defined
-#define log_id_t_defined
-typedef enum log_id {
-  LOG_ID_MIN = 0,
-
-  LOG_ID_MAIN = 0,
-  LOG_ID_RADIO = 1,
-  LOG_ID_EVENTS = 2,
-  LOG_ID_SYSTEM = 3,
-  LOG_ID_CRASH = 4,
-  LOG_ID_STATS = 5,
-  LOG_ID_SECURITY = 6,
-  LOG_ID_KERNEL = 7, /* place last, third-parties can not use it */
-
-  LOG_ID_MAX
-} log_id_t;
-#endif
-#define sizeof_log_id_t sizeof(typeof_log_id_t)
-#define typeof_log_id_t unsigned char
-
 /*
  * Send a simple string to the log.
  */
diff --git a/liblog/include/log/log_main.h b/liblog/include/log/log_main.h
index 64791c2..1bd1c8a 100644
--- a/liblog/include/log/log_main.h
+++ b/liblog/include/log/log_main.h
@@ -56,7 +56,7 @@
 /*
  * Use __VA_ARGS__ if running a static analyzer,
  * to avoid warnings of unused variables in __VA_ARGS__.
- * Use contexpr function in C++ mode, so these macros can be used
+ * Use constexpr function in C++ mode, so these macros can be used
  * in other constexpr functions without warning.
  */
 #ifdef __clang_analyzer__
@@ -131,10 +131,10 @@
  * is -inverted- from the normal assert() semantics.
  */
 #ifndef LOG_ALWAYS_FATAL_IF
-#define LOG_ALWAYS_FATAL_IF(cond, ...)                              \
-  ((__predict_false(cond))                                          \
-       ? ((void)android_printAssert(#cond, LOG_TAG, ##__VA_ARGS__)) \
-       : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define LOG_ALWAYS_FATAL_IF(cond, ...)                                                    \
+  ((__predict_false(cond)) ? (__FAKE_USE_VA_ARGS(__VA_ARGS__),                            \
+                              ((void)android_printAssert(#cond, LOG_TAG, ##__VA_ARGS__))) \
+                           : ((void)0))
 #endif
 
 #ifndef LOG_ALWAYS_FATAL
@@ -213,9 +213,10 @@
 #if LOG_NDEBUG
 #define ALOGV_IF(cond, ...) __FAKE_USE_VA_ARGS(__VA_ARGS__)
 #else
-#define ALOGV_IF(cond, ...)                                                  \
-  ((__predict_false(cond)) ? ((void)ALOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \
-                           : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define ALOGV_IF(cond, ...)                                                               \
+  ((__predict_false(cond))                                                                \
+       ? (__FAKE_USE_VA_ARGS(__VA_ARGS__), (void)ALOG(LOG_VERBOSE, LOG_TAG, __VA_ARGS__)) \
+       : ((void)0))
 #endif
 #endif
 
@@ -227,9 +228,10 @@
 #endif
 
 #ifndef ALOGD_IF
-#define ALOGD_IF(cond, ...)                                                \
-  ((__predict_false(cond)) ? ((void)ALOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \
-                           : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define ALOGD_IF(cond, ...)                                                             \
+  ((__predict_false(cond))                                                              \
+       ? (__FAKE_USE_VA_ARGS(__VA_ARGS__), (void)ALOG(LOG_DEBUG, LOG_TAG, __VA_ARGS__)) \
+       : ((void)0))
 #endif
 
 /*
@@ -240,9 +242,10 @@
 #endif
 
 #ifndef ALOGI_IF
-#define ALOGI_IF(cond, ...)                                               \
-  ((__predict_false(cond)) ? ((void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) \
-                           : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define ALOGI_IF(cond, ...)                                                            \
+  ((__predict_false(cond))                                                             \
+       ? (__FAKE_USE_VA_ARGS(__VA_ARGS__), (void)ALOG(LOG_INFO, LOG_TAG, __VA_ARGS__)) \
+       : ((void)0))
 #endif
 
 /*
@@ -253,9 +256,10 @@
 #endif
 
 #ifndef ALOGW_IF
-#define ALOGW_IF(cond, ...)                                               \
-  ((__predict_false(cond)) ? ((void)ALOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) \
-                           : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define ALOGW_IF(cond, ...)                                                            \
+  ((__predict_false(cond))                                                             \
+       ? (__FAKE_USE_VA_ARGS(__VA_ARGS__), (void)ALOG(LOG_WARN, LOG_TAG, __VA_ARGS__)) \
+       : ((void)0))
 #endif
 
 /*
@@ -266,9 +270,10 @@
 #endif
 
 #ifndef ALOGE_IF
-#define ALOGE_IF(cond, ...)                                                \
-  ((__predict_false(cond)) ? ((void)ALOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) \
-                           : __FAKE_USE_VA_ARGS(__VA_ARGS__))
+#define ALOGE_IF(cond, ...)                                                             \
+  ((__predict_false(cond))                                                              \
+       ? (__FAKE_USE_VA_ARGS(__VA_ARGS__), (void)ALOG(LOG_ERROR, LOG_TAG, __VA_ARGS__)) \
+       : ((void)0))
 #endif
 
 /* --------------------------------------------------------------------- */
diff --git a/liblog/include/log/log_read.h b/liblog/include/log/log_read.h
index 2079e7a..18c1c33 100644
--- a/liblog/include/log/log_read.h
+++ b/liblog/include/log/log_read.h
@@ -50,53 +50,9 @@
 
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wzero-length-array"
-/*
- * The userspace structure for version 1 of the logger_entry ABI.
- */
 struct logger_entry {
-  uint16_t len;   /* length of the payload */
-  uint16_t __pad; /* no matter what, we get 2 bytes of padding */
-  int32_t pid;    /* generating process's pid */
-  int32_t tid;    /* generating process's tid */
-  int32_t sec;    /* seconds since Epoch */
-  int32_t nsec;   /* nanoseconds */
-  char msg[0]; /* the entry's payload */
-};
-
-/*
- * The userspace structure for version 2 of the logger_entry ABI.
- */
-struct logger_entry_v2 {
   uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v2) */
-  int32_t pid;       /* generating process's pid */
-  int32_t tid;       /* generating process's tid */
-  int32_t sec;       /* seconds since Epoch */
-  int32_t nsec;      /* nanoseconds */
-  uint32_t euid;     /* effective UID of logger */
-  char msg[0]; /* the entry's payload */
-} __attribute__((__packed__));
-
-/*
- * The userspace structure for version 3 of the logger_entry ABI.
- */
-struct logger_entry_v3 {
-  uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v3) */
-  int32_t pid;       /* generating process's pid */
-  int32_t tid;       /* generating process's tid */
-  int32_t sec;       /* seconds since Epoch */
-  int32_t nsec;      /* nanoseconds */
-  uint32_t lid;      /* log id of the payload */
-  char msg[0]; /* the entry's payload */
-} __attribute__((__packed__));
-
-/*
- * The userspace structure for version 4 of the logger_entry ABI.
- */
-struct logger_entry_v4 {
-  uint16_t len;      /* length of the payload */
-  uint16_t hdr_size; /* sizeof(struct logger_entry_v4) */
+  uint16_t hdr_size; /* sizeof(struct logger_entry) */
   int32_t pid;       /* generating process's pid */
   uint32_t tid;      /* generating process's tid */
   uint32_t sec;      /* seconds since Epoch */
@@ -124,11 +80,7 @@
 struct log_msg {
   union {
     unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1];
-    struct logger_entry_v4 entry;
-    struct logger_entry_v4 entry_v4;
-    struct logger_entry_v3 entry_v3;
-    struct logger_entry_v2 entry_v2;
-    struct logger_entry entry_v1;
+    struct logger_entry entry;
   } __attribute__((aligned(4)));
 #ifdef __cplusplus
   /* Matching log_time operators */
@@ -162,19 +114,12 @@
   }
   char* msg() {
     unsigned short hdr_size = entry.hdr_size;
-    if (!hdr_size) {
-      hdr_size = sizeof(entry_v1);
-    }
-    if ((hdr_size < sizeof(entry_v1)) || (hdr_size > sizeof(entry))) {
+    if (hdr_size >= sizeof(struct log_msg) - sizeof(entry)) {
       return nullptr;
     }
     return reinterpret_cast<char*>(buf) + hdr_size;
   }
-  unsigned int len() {
-    return (entry.hdr_size ? entry.hdr_size
-                           : static_cast<uint16_t>(sizeof(entry_v1))) +
-           entry.len;
-  }
+  unsigned int len() { return entry.hdr_size + entry.len; }
 #endif
 };
 
@@ -194,8 +139,7 @@
                                       char* buf, size_t len);
 ssize_t android_logger_get_prune_list(struct logger_list* logger_list,
                                       char* buf, size_t len);
-int android_logger_set_prune_list(struct logger_list* logger_list, char* buf,
-                                  size_t len);
+int android_logger_set_prune_list(struct logger_list* logger_list, const char* buf, size_t len);
 
 #define ANDROID_LOG_RDONLY O_RDONLY
 #define ANDROID_LOG_WRONLY O_WRONLY
diff --git a/liblog/include/private/android_logger.h b/liblog/include/private/android_logger.h
index d3cb571..d3b72bc 100644
--- a/liblog/include/private/android_logger.h
+++ b/liblog/include/private/android_logger.h
@@ -47,7 +47,7 @@
 
 /* Header Structure to logd, and second header for pstore */
 typedef struct __attribute__((__packed__)) {
-  typeof_log_id_t id;
+  uint8_t id;
   uint16_t tid;
   log_time realtime;
 } android_log_header_t;
diff --git a/liblog/liblog.map.txt b/liblog/liblog.map.txt
index ce4c53c..198cdae 100644
--- a/liblog/liblog.map.txt
+++ b/liblog/liblog.map.txt
@@ -1,7 +1,7 @@
 LIBLOG {
   global:
-    android_name_to_log_id; # vndk
-    android_log_id_to_name; # vndk
+    android_name_to_log_id; # llndk
+    android_log_id_to_name; # llndk
     __android_log_assert;
     __android_log_buf_print;
     __android_log_buf_write;
@@ -14,62 +14,76 @@
 
 LIBLOG_L {
   global:
-    android_logger_clear; # vndk
-    android_logger_get_id; # vndk
-    android_logger_get_log_readable_size; # vndk
-    android_logger_get_log_version; # vndk
-    android_logger_get_log_size; # vndk
-    android_logger_list_alloc; # apex vndk
-    android_logger_list_alloc_time; # apex vndk
-    android_logger_list_free; # apex vndk
-    android_logger_list_open; # vndk
-    android_logger_list_read; # apex vndk
-    android_logger_open; # apex vndk
-    android_logger_set_log_size; # vndk
+    android_logger_clear; # llndk
+    android_logger_get_id; # llndk
+    android_logger_get_log_readable_size; # llndk
+    android_logger_get_log_version; # llndk
+    android_logger_get_log_size; # llndk
+    android_logger_list_alloc; # apex llndk
+    android_logger_list_alloc_time; # apex llndk
+    android_logger_list_free; # apex llndk
+    android_logger_list_open; # llndk
+    android_logger_list_read; # apex llndk
+    android_logger_open; # apex llndk
+    android_logger_set_log_size; # llndk
 };
 
 LIBLOG_M {
   global:
-    android_logger_get_prune_list; # vndk
-    android_logger_set_prune_list; # vndk
-    android_logger_get_statistics; # vndk
-    __android_log_error_write; # apex vndk
+    android_logger_get_prune_list; # llndk
+    android_logger_set_prune_list; # llndk
+    android_logger_get_statistics; # llndk
+    __android_log_error_write; # apex llndk
     __android_log_is_loggable;
-    create_android_logger; # apex vndk
-    android_log_destroy; # apex vndk
-    android_log_write_list_begin; # apex vndk
-    android_log_write_list_end; # apex vndk
-    android_log_write_int32; # apex vndk
-    android_log_write_int64; # apex vndk
-    android_log_write_string8; # apex vndk
-    android_log_write_string8_len; # apex vndk
-    android_log_write_float32; # apex vndk
-    android_log_write_list; # apex vndk
+    create_android_logger; # apex llndk
+    android_log_destroy; # apex llndk
+    android_log_write_list_begin; # apex llndk
+    android_log_write_list_end; # apex llndk
+    android_log_write_int32; # apex llndk
+    android_log_write_int64; # apex llndk
+    android_log_write_string8; # apex llndk
+    android_log_write_string8_len; # apex llndk
+    android_log_write_float32; # apex llndk
+    android_log_write_list; # apex llndk
 
 };
 
 LIBLOG_O {
   global:
     __android_log_is_loggable_len;
-    __android_log_is_debuggable; # vndk
+    __android_log_is_debuggable; # apex llndk
 };
 
-LIBLOG_Q {
+LIBLOG_Q { # introduced=29
   global:
     __android_log_bswrite; # apex
     __android_log_btwrite; # apex
     __android_log_bwrite; # apex
     __android_log_close; # apex
     __android_log_security; # apex
-    android_log_reset; #vndk
-    android_log_parser_reset; #vndk
+    android_log_reset; # llndk
+    android_log_parser_reset; # llndk
+};
+
+LIGLOG_R { # introduced=30
+  global:
+    __android_log_call_aborter;
+    __android_log_default_aborter;
+    __android_log_get_minimum_priority;
+    __android_log_logd_logger;
+    __android_log_security_bswrite; # apex
+    __android_log_set_aborter;
+    __android_log_set_default_tag;
+    __android_log_set_logger;
+    __android_log_set_minimum_priority;
+    __android_log_stderr_logger;
+    __android_log_write_logger_data;
 };
 
 LIBLOG_PRIVATE {
   global:
     __android_log_pmsg_file_read;
     __android_log_pmsg_file_write;
-    __android_log_security_bswrite;
     __android_logger_get_buffer_size;
     __android_logger_property_get_bool;
     android_openEventTagMap;
diff --git a/liblog/log_event_list.cpp b/liblog/log_event_list.cpp
index 7882c96..cb70d48 100644
--- a/liblog/log_event_list.cpp
+++ b/liblog/log_event_list.cpp
@@ -25,8 +25,6 @@
 #include <log/log_event_list.h>
 #include <private/android_logger.h>
 
-#include "log_portability.h"
-
 #define MAX_EVENT_PAYLOAD (LOGGER_ENTRY_MAX_PAYLOAD - sizeof(int32_t))
 
 enum ReadWriteFlag {
@@ -47,9 +45,6 @@
   uint8_t storage[LOGGER_ENTRY_MAX_PAYLOAD];
 };
 
-// TODO(tomcherry): real C++ structs.
-typedef struct android_log_context_internal android_log_context_internal;
-
 static void init_context(android_log_context_internal* context, uint32_t tag) {
   context->tag = tag;
   context->read_write_flag = kAndroidLoggerWrite;
@@ -110,11 +105,9 @@
   return 0;
 }
 
-int android_log_reset(android_log_context ctx) {
-  android_log_context_internal* context;
+int android_log_reset(android_log_context context) {
   uint32_t tag;
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -126,10 +119,7 @@
   return 0;
 }
 
-int android_log_parser_reset(android_log_context ctx, const char* msg, size_t len) {
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_parser_reset(android_log_context context, const char* msg, size_t len) {
   if (!context || (kAndroidLoggerRead != context->read_write_flag)) {
     return -EBADF;
   }
@@ -140,10 +130,7 @@
   return 0;
 }
 
-int android_log_write_list_begin(android_log_context ctx) {
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_list_begin(android_log_context context) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -174,8 +161,7 @@
   return 0;
 }
 
-int android_log_write_int32(android_log_context ctx, int32_t value) {
-  android_log_context_internal* context = (android_log_context_internal*)ctx;
+int android_log_write_int32(android_log_context context, int32_t value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -195,8 +181,7 @@
   return 0;
 }
 
-int android_log_write_int64(android_log_context ctx, int64_t value) {
-  android_log_context_internal* context = (android_log_context_internal*)ctx;
+int android_log_write_int64(android_log_context context, int64_t value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -216,8 +201,7 @@
   return 0;
 }
 
-int android_log_write_string8_len(android_log_context ctx, const char* value, size_t maxlen) {
-  android_log_context_internal* context = (android_log_context_internal*)ctx;
+int android_log_write_string8_len(android_log_context context, const char* value, size_t maxlen) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -252,8 +236,7 @@
   return android_log_write_string8_len(ctx, value, MAX_EVENT_PAYLOAD);
 }
 
-int android_log_write_float32(android_log_context ctx, float value) {
-  android_log_context_internal* context = (android_log_context_internal*)ctx;
+int android_log_write_float32(android_log_context context, float value) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -273,10 +256,7 @@
   return 0;
 }
 
-int android_log_write_list_end(android_log_context ctx) {
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
+int android_log_write_list_end(android_log_context context) {
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -303,8 +283,7 @@
 /*
  * Logs the list of elements to the event log.
  */
-int android_log_write_list(android_log_context ctx, log_id_t id) {
-  android_log_context_internal* context;
+int android_log_write_list(android_log_context context, log_id_t id) {
   const char* msg;
   ssize_t len;
 
@@ -312,7 +291,6 @@
     return -EINVAL;
   }
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -337,12 +315,10 @@
                                      : __android_log_security_bwrite(context->tag, msg, len));
 }
 
-int android_log_write_list_buffer(android_log_context ctx, const char** buffer) {
-  android_log_context_internal* context;
+int android_log_write_list_buffer(android_log_context context, const char** buffer) {
   const char* msg;
   ssize_t len;
 
-  context = (android_log_context_internal*)ctx;
   if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
     return -EBADF;
   }
@@ -375,12 +351,10 @@
  * this and continues to call this function, the behavior is undefined
  * (although it won't crash).
  */
-static android_log_list_element android_log_read_next_internal(android_log_context ctx, int peek) {
+static android_log_list_element android_log_read_next_internal(android_log_context context,
+                                                               int peek) {
   android_log_list_element elem;
   unsigned pos;
-  android_log_context_internal* context;
-
-  context = (android_log_context_internal*)ctx;
 
   memset(&elem, 0, sizeof(elem));
 
diff --git a/liblog/log_event_write.cpp b/liblog/log_event_write.cpp
index d04ba90..39afd0c 100644
--- a/liblog/log_event_write.cpp
+++ b/liblog/log_event_write.cpp
@@ -20,8 +20,6 @@
 #include <log/log.h>
 #include <log/log_event_list.h>
 
-#include "log_portability.h"
-
 #define MAX_SUBTAG_LEN 32
 
 int __android_log_error_write(int tag, const char* subTag, int32_t uid, const char* data,
diff --git a/liblog/log_portability.h b/liblog/log_portability.h
deleted file mode 100644
index b7279d1..0000000
--- a/liblog/log_portability.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/cdefs.h>
-#include <unistd.h>
-
-/* possible missing definitions in sys/cdefs.h */
-
-/* DECLS */
-#ifndef __BEGIN_DECLS
-#if defined(__cplusplus)
-#define __BEGIN_DECLS extern "C" {
-#define __END_DECLS }
-#else
-#define __BEGIN_DECLS
-#define __END_DECLS
-#endif
-#endif
-
-/* possible missing definitions in unistd.h */
-
-#ifndef TEMP_FAILURE_RETRY
-/* Used to retry syscalls that can return EINTR. */
-#define TEMP_FAILURE_RETRY(exp)            \
-  ({                                       \
-    __typeof__(exp) _rc;                   \
-    do {                                   \
-      _rc = (exp);                         \
-    } while (_rc == -1 && errno == EINTR); \
-    _rc;                                   \
-  })
-#endif
diff --git a/liblog/log_time.cpp b/liblog/log_time.cpp
index 3ae250f..3fbe1cb 100644
--- a/liblog/log_time.cpp
+++ b/liblog/log_time.cpp
@@ -21,8 +21,6 @@
 
 #include <private/android_logger.h>
 
-#include "log_portability.h"
-
 const char log_time::default_format[] = "%m-%d %H:%M:%S.%q";
 const timespec log_time::EPOCH = {0, 0};
 
diff --git a/liblog/logd_reader.cpp b/liblog/logd_reader.cpp
index 619cf8c..82ed6b2 100644
--- a/liblog/logd_reader.cpp
+++ b/liblog/logd_reader.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "logd_reader.h"
+
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -31,70 +33,12 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <cutils/sockets.h>
-#include <private/android_filesystem_config.h>
+#include <string>
+
 #include <private/android_logger.h>
 
-#include "log_portability.h"
-#include "logd_reader.h"
 #include "logger.h"
 
-static int logdAvailable(log_id_t LogId);
-static int logdVersion(struct android_log_logger* logger,
-                       struct android_log_transport_context* transp);
-static int logdRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg);
-static int logdPoll(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp);
-static void logdClose(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp);
-static int logdClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-static ssize_t logdSetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp, size_t size);
-static ssize_t logdGetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp);
-static ssize_t logdGetReadableSize(struct android_log_logger* logger,
-                                   struct android_log_transport_context* transp);
-static ssize_t logdGetPrune(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-static ssize_t logdSetPrune(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-static ssize_t logdGetStats(struct android_log_logger_list* logger,
-                            struct android_log_transport_context* transp, char* buf, size_t len);
-
-struct android_log_transport_read logdLoggerRead = {
-    .name = "logd",
-    .available = logdAvailable,
-    .version = logdVersion,
-    .close = logdClose,
-    .read = logdRead,
-    .poll = logdPoll,
-    .clear = logdClear,
-    .setSize = logdSetSize,
-    .getSize = logdGetSize,
-    .getReadableSize = logdGetReadableSize,
-    .getPrune = logdGetPrune,
-    .setPrune = logdSetPrune,
-    .getStats = logdGetStats,
-};
-
-static int logdAvailable(log_id_t logId) {
-  if (logId >= LOG_ID_MAX) {
-    return -EINVAL;
-  }
-  if (logId == LOG_ID_SECURITY) {
-    uid_t uid = __android_log_uid();
-    if (uid != AID_SYSTEM) {
-      return -EPERM;
-    }
-  }
-  if (access("/dev/socket/logdw", W_OK) == 0) {
-    return 0;
-  }
-  return -EBADF;
-}
-
 // Connects to /dev/socket/<name> and returns the associated fd or returns -1 on error.
 // O_CLOEXEC is always set.
 static int socket_local_client(const std::string& name, int type) {
@@ -120,8 +64,7 @@
 }
 
 /* worker for sending the command to the logger */
-static ssize_t send_log_msg(struct android_log_logger* logger, const char* msg, char* buf,
-                            size_t buf_size) {
+ssize_t SendLogdControlMessage(char* buf, size_t buf_size) {
   ssize_t ret;
   size_t len;
   char* cp;
@@ -131,10 +74,6 @@
     return sock;
   }
 
-  if (msg) {
-    snprintf(buf, buf_size, msg, logger ? logger->logId : (unsigned)-1);
-  }
-
   len = strlen(buf) + 1;
   ret = TEMP_FAILURE_RETRY(write(sock, buf, len));
   if (ret <= 0) {
@@ -185,10 +124,6 @@
   return ret;
 }
 
-ssize_t __send_log_msg(char* buf, size_t buf_size) {
-  return send_log_msg(NULL, NULL, buf, buf_size);
-}
-
 static int check_log_success(char* buf, ssize_t ret) {
   if (ret < 0) {
     return ret;
@@ -202,19 +137,28 @@
   return 0;
 }
 
-static int logdClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp __unused) {
+int android_logger_clear(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
+  uint32_t log_id = android_logger_get_id(logger);
   char buf[512];
+  snprintf(buf, sizeof(buf), "clear %" PRIu32, log_id);
 
-  return check_log_success(buf, send_log_msg(logger, "clear %d", buf, sizeof(buf)));
+  return check_log_success(buf, SendLogdControlMessage(buf, sizeof(buf)));
 }
 
 /* returns the total size of the log's ring buffer */
-static ssize_t logdGetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp __unused) {
-  char buf[512];
+long android_logger_get_log_size(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
 
-  ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf));
+  uint32_t log_id = android_logger_get_id(logger);
+  char buf[512];
+  snprintf(buf, sizeof(buf), "getLogSize %" PRIu32, log_id);
+
+  ssize_t ret = SendLogdControlMessage(buf, sizeof(buf));
   if (ret < 0) {
     return ret;
   }
@@ -226,24 +170,32 @@
   return atol(buf);
 }
 
-static ssize_t logdSetSize(struct android_log_logger* logger,
-                           struct android_log_transport_context* transp __unused, size_t size) {
+int android_logger_set_log_size(struct logger* logger, unsigned long size) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
+
+  uint32_t log_id = android_logger_get_id(logger);
   char buf[512];
+  snprintf(buf, sizeof(buf), "setLogSize %" PRIu32 " %lu", log_id, size);
 
-  snprintf(buf, sizeof(buf), "setLogSize %d %zu", logger->logId, size);
-
-  return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf)));
+  return check_log_success(buf, SendLogdControlMessage(buf, sizeof(buf)));
 }
 
 /*
  * returns the readable size of the log's ring buffer (that is, amount of the
  * log consumed)
  */
-static ssize_t logdGetReadableSize(struct android_log_logger* logger,
-                                   struct android_log_transport_context* transp __unused) {
-  char buf[512];
+long android_logger_get_log_readable_size(struct logger* logger) {
+  if (!android_logger_is_logd(logger)) {
+    return -EINVAL;
+  }
 
-  ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf));
+  uint32_t log_id = android_logger_get_id(logger);
+  char buf[512];
+  snprintf(buf, sizeof(buf), "getLogSizeUsed %" PRIu32, log_id);
+
+  ssize_t ret = SendLogdControlMessage(buf, sizeof(buf));
   if (ret < 0) {
     return ret;
   }
@@ -255,22 +207,15 @@
   return atol(buf);
 }
 
-/*
- * returns the logger version
- */
-static int logdVersion(struct android_log_logger* logger __unused,
-                       struct android_log_transport_context* transp __unused) {
-  uid_t uid = __android_log_uid();
-  return ((uid != AID_ROOT) && (uid != AID_LOG) && (uid != AID_SYSTEM)) ? 3 : 4;
+int android_logger_get_log_version(struct logger*) {
+  return 4;
 }
 
-/*
- * returns statistics
- */
-static ssize_t logdGetStats(struct android_log_logger_list* logger_list,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  struct android_log_logger* logger;
+ssize_t android_logger_get_statistics(struct logger_list* logger_list, char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    return -EINVAL;
+  }
+
   char* cp = buf;
   size_t remaining = len;
   size_t n;
@@ -280,53 +225,45 @@
   remaining -= n;
   cp += n;
 
-  logger_for_each(logger, logger_list) {
-    n = snprintf(cp, remaining, " %d", logger->logId);
-    n = MIN(n, remaining);
-    remaining -= n;
-    cp += n;
+  for (size_t log_id = 0; log_id < LOG_ID_MAX; ++log_id) {
+    if ((1 << log_id) & logger_list->log_mask) {
+      n = snprintf(cp, remaining, " %zu", log_id);
+      n = MIN(n, remaining);
+      remaining -= n;
+      cp += n;
+    }
   }
 
   if (logger_list->pid) {
     snprintf(cp, remaining, " pid=%u", logger_list->pid);
   }
 
-  return send_log_msg(NULL, NULL, buf, len);
+  return SendLogdControlMessage(buf, len);
 }
-
-static ssize_t logdGetPrune(struct android_log_logger_list* logger_list __unused,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  return send_log_msg(NULL, "getPruneList", buf, len);
-}
-
-static ssize_t logdSetPrune(struct android_log_logger_list* logger_list __unused,
-                            struct android_log_transport_context* transp __unused, char* buf,
-                            size_t len) {
-  const char cmd[] = "setPruneList ";
-  const size_t cmdlen = sizeof(cmd) - 1;
-
-  if (strlen(buf) > (len - cmdlen)) {
-    return -ENOMEM; /* KISS */
-  }
-  memmove(buf + cmdlen, buf, len - cmdlen);
-  buf[len - 1] = '\0';
-  memcpy(buf, cmd, cmdlen);
-
-  return check_log_success(buf, send_log_msg(NULL, NULL, buf, len));
-}
-
-static int logdOpen(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp) {
-  struct android_log_logger* logger;
-  char buffer[256], *cp, c;
-  int ret, remaining, sock;
-
-  if (!logger_list) {
+ssize_t android_logger_get_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
     return -EINVAL;
   }
 
-  sock = atomic_load(&transp->context.sock);
+  snprintf(buf, len, "getPruneList");
+  return SendLogdControlMessage(buf, len);
+}
+
+int android_logger_set_prune_list(struct logger_list* logger_list, const char* buf, size_t len) {
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    return -EINVAL;
+  }
+
+  std::string cmd = "setPruneList " + std::string{buf, len};
+
+  return check_log_success(cmd.data(), SendLogdControlMessage(cmd.data(), cmd.size()));
+}
+
+static int logdOpen(struct logger_list* logger_list) {
+  char buffer[256], *cp, c;
+  int ret, remaining, sock;
+
+  sock = atomic_load(&logger_list->fd);
   if (sock > 0) {
     return sock;
   }
@@ -346,12 +283,15 @@
   cp += 5;
   c = '=';
   remaining = sizeof(buffer) - (cp - buffer);
-  logger_for_each(logger, logger_list) {
-    ret = snprintf(cp, remaining, "%c%u", c, logger->logId);
-    ret = MIN(ret, remaining);
-    remaining -= ret;
-    cp += ret;
-    c = ',';
+
+  for (size_t log_id = 0; log_id < LOG_ID_MAX; ++log_id) {
+    if ((1 << log_id) & logger_list->log_mask) {
+      ret = snprintf(cp, remaining, "%c%zu", c, log_id);
+      ret = MIN(ret, remaining);
+      remaining -= ret;
+      cp += ret;
+      c = ',';
+    }
   }
 
   if (logger_list->tail) {
@@ -396,7 +336,7 @@
     return ret;
   }
 
-  ret = atomic_exchange(&transp->context.sock, sock);
+  ret = atomic_exchange(&logger_list->fd, sock);
   if ((ret > 0) && (ret != sock)) {
     close(ret);
   }
@@ -404,15 +344,12 @@
 }
 
 /* Read from the selected logs */
-static int logdRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg) {
-  int ret = logdOpen(logger_list, transp);
+int LogdRead(struct logger_list* logger_list, struct log_msg* log_msg) {
+  int ret = logdOpen(logger_list);
   if (ret < 0) {
     return ret;
   }
 
-  memset(log_msg, 0, sizeof(*log_msg));
-
   /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */
   ret = TEMP_FAILURE_RETRY(recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0));
   if ((logger_list->mode & ANDROID_LOG_NONBLOCK) && ret == 0) {
@@ -425,32 +362,9 @@
   return ret;
 }
 
-static int logdPoll(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp) {
-  struct pollfd p;
-
-  int ret = logdOpen(logger_list, transp);
-  if (ret < 0) {
-    return ret;
-  }
-
-  memset(&p, 0, sizeof(p));
-  p.fd = ret;
-  p.events = POLLIN;
-  ret = poll(&p, 1, 20);
-  if ((ret > 0) && !(p.revents & POLLIN)) {
-    ret = 0;
-  }
-  if ((ret == -1) && errno) {
-    return -errno;
-  }
-  return ret;
-}
-
 /* Close all the logs */
-static void logdClose(struct android_log_logger_list* logger_list __unused,
-                      struct android_log_transport_context* transp) {
-  int sock = atomic_exchange(&transp->context.sock, -1);
+void LogdClose(struct logger_list* logger_list) {
+  int sock = atomic_exchange(&logger_list->fd, -1);
   if (sock > 0) {
     close(sock);
   }
diff --git a/liblog/logd_reader.h b/liblog/logd_reader.h
index 7c53cbb..68eef02 100644
--- a/liblog/logd_reader.h
+++ b/liblog/logd_reader.h
@@ -16,12 +16,16 @@
 
 #pragma once
 
+#include <sys/cdefs.h>
 #include <unistd.h>
 
-#include "log_portability.h"
+#include "log/log_read.h"
 
 __BEGIN_DECLS
 
-ssize_t __send_log_msg(char* buf, size_t buf_size);
+int LogdRead(struct logger_list* logger_list, struct log_msg* log_msg);
+void LogdClose(struct logger_list* logger_list);
+
+ssize_t SendLogdControlMessage(char* buf, size_t buf_size);
 
 __END_DECLS
diff --git a/liblog/logd_writer.cpp b/liblog/logd_writer.cpp
index 06a2baf..67376f4 100644
--- a/liblog/logd_writer.cpp
+++ b/liblog/logd_writer.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "logd_writer.h"
+
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
@@ -30,97 +32,66 @@
 #include <time.h>
 #include <unistd.h>
 
-#include <cutils/sockets.h>
+#include <shared_mutex>
+
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "log_portability.h"
 #include "logger.h"
+#include "rwlock.h"
 #include "uio.h"
 
-static int logdAvailable(log_id_t LogId);
-static int logdOpen();
-static void logdClose();
-static int logdWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
+static int logd_socket;
+static RwLock logd_socket_lock;
 
-struct android_log_transport_write logdLoggerWrite = {
-    .name = "logd",
-    .logMask = 0,
-    .context.sock = -EBADF,
-    .available = logdAvailable,
-    .open = logdOpen,
-    .close = logdClose,
-    .write = logdWrite,
-};
-
-/* log_init_lock assumed */
-static int logdOpen() {
-  int i, ret = 0;
-
-  i = atomic_load(&logdLoggerWrite.context.sock);
-  if (i < 0) {
-    int sock = TEMP_FAILURE_RETRY(socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0));
-    if (sock < 0) {
-      ret = -errno;
-    } else {
-      struct sockaddr_un un;
-      memset(&un, 0, sizeof(struct sockaddr_un));
-      un.sun_family = AF_UNIX;
-      strcpy(un.sun_path, "/dev/socket/logdw");
-
-      if (TEMP_FAILURE_RETRY(connect(sock, (struct sockaddr*)&un, sizeof(struct sockaddr_un))) <
-          0) {
-        ret = -errno;
-        switch (ret) {
-          case -ENOTCONN:
-          case -ECONNREFUSED:
-          case -ENOENT:
-            i = atomic_exchange(&logdLoggerWrite.context.sock, ret);
-            [[fallthrough]];
-          default:
-            break;
-        }
-        close(sock);
-      } else {
-        ret = atomic_exchange(&logdLoggerWrite.context.sock, sock);
-        if ((ret >= 0) && (ret != sock)) {
-          close(ret);
-        }
-        ret = 0;
-      }
-    }
+static void OpenSocketLocked() {
+  logd_socket = TEMP_FAILURE_RETRY(socket(PF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0));
+  if (logd_socket <= 0) {
+    return;
   }
 
-  return ret;
-}
+  sockaddr_un un = {};
+  un.sun_family = AF_UNIX;
+  strcpy(un.sun_path, "/dev/socket/logdw");
 
-static void __logdClose(int negative_errno) {
-  int sock = atomic_exchange(&logdLoggerWrite.context.sock, negative_errno);
-  if (sock >= 0) {
-    close(sock);
+  if (TEMP_FAILURE_RETRY(
+          connect(logd_socket, reinterpret_cast<sockaddr*>(&un), sizeof(sockaddr_un))) < 0) {
+    close(logd_socket);
+    logd_socket = 0;
   }
 }
 
-static void logdClose() {
-  __logdClose(-EBADF);
+static void OpenSocket() {
+  auto lock = std::unique_lock{logd_socket_lock};
+  if (logd_socket > 0) {
+    // Someone raced us and opened the socket already.
+    return;
+  }
+
+  OpenSocketLocked();
 }
 
-static int logdAvailable(log_id_t logId) {
-  if (logId >= LOG_ID_MAX || logId == LOG_ID_KERNEL) {
-    return -EINVAL;
+static void ResetSocket(int old_socket) {
+  auto lock = std::unique_lock{logd_socket_lock};
+  if (old_socket != logd_socket) {
+    // Someone raced us and reset the socket already.
+    return;
   }
-  if (atomic_load(&logdLoggerWrite.context.sock) < 0) {
-    if (access("/dev/socket/logdw", W_OK) == 0) {
-      return 0;
-    }
-    return -EBADF;
-  }
-  return 1;
+  close(logd_socket);
+  logd_socket = 0;
+  OpenSocketLocked();
 }
 
-static int logdWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
+void LogdClose() {
+  auto lock = std::unique_lock{logd_socket_lock};
+  if (logd_socket > 0) {
+    close(logd_socket);
+  }
+  logd_socket = 0;
+}
+
+int LogdWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
   ssize_t ret;
-  int sock;
   static const unsigned headerLength = 1;
   struct iovec newVec[nr + headerLength];
   android_log_header_t header;
@@ -128,18 +99,19 @@
   static atomic_int dropped;
   static atomic_int droppedSecurity;
 
-  sock = atomic_load(&logdLoggerWrite.context.sock);
-  if (sock < 0) switch (sock) {
-      case -ENOTCONN:
-      case -ECONNREFUSED:
-      case -ENOENT:
-        break;
-      default:
-        return -EBADF;
-    }
+  auto lock = std::shared_lock{logd_socket_lock};
+  if (logd_socket <= 0) {
+    lock.unlock();
+    OpenSocket();
+    lock.lock();
+  }
+
+  if (logd_socket <= 0) {
+    return -EBADF;
+  }
 
   /* logd, after initialization and priv drop */
-  if (__android_log_uid() == AID_LOGD) {
+  if (getuid() == AID_LOGD) {
     /*
      * ignore log messages we send to ourself (logd).
      * Such log messages are often generated by libraries we depend on
@@ -148,24 +120,6 @@
     return 0;
   }
 
-  /*
-   *  struct {
-   *      // what we provide to socket
-   *      android_log_header_t header;
-   *      // caller provides
-   *      union {
-   *          struct {
-   *              char     prio;
-   *              char     payload[];
-   *          } string;
-   *          struct {
-   *              uint32_t tag
-   *              char     payload[];
-   *          } binary;
-   *      };
-   *  };
-   */
-
   header.tid = gettid();
   header.realtime.tv_sec = ts->tv_sec;
   header.realtime.tv_nsec = ts->tv_nsec;
@@ -173,41 +127,39 @@
   newVec[0].iov_base = (unsigned char*)&header;
   newVec[0].iov_len = sizeof(header);
 
-  if (sock >= 0) {
-    int32_t snapshot = atomic_exchange_explicit(&droppedSecurity, 0, memory_order_relaxed);
-    if (snapshot) {
-      android_log_event_int_t buffer;
+  int32_t snapshot = atomic_exchange_explicit(&droppedSecurity, 0, memory_order_relaxed);
+  if (snapshot) {
+    android_log_event_int_t buffer;
 
-      header.id = LOG_ID_SECURITY;
-      buffer.header.tag = LIBLOG_LOG_TAG;
-      buffer.payload.type = EVENT_TYPE_INT;
-      buffer.payload.data = snapshot;
+    header.id = LOG_ID_SECURITY;
+    buffer.header.tag = LIBLOG_LOG_TAG;
+    buffer.payload.type = EVENT_TYPE_INT;
+    buffer.payload.data = snapshot;
 
-      newVec[headerLength].iov_base = &buffer;
-      newVec[headerLength].iov_len = sizeof(buffer);
+    newVec[headerLength].iov_base = &buffer;
+    newVec[headerLength].iov_len = sizeof(buffer);
 
-      ret = TEMP_FAILURE_RETRY(writev(sock, newVec, 2));
-      if (ret != (ssize_t)(sizeof(header) + sizeof(buffer))) {
-        atomic_fetch_add_explicit(&droppedSecurity, snapshot, memory_order_relaxed);
-      }
+    ret = TEMP_FAILURE_RETRY(writev(logd_socket, newVec, 2));
+    if (ret != (ssize_t)(sizeof(header) + sizeof(buffer))) {
+      atomic_fetch_add_explicit(&droppedSecurity, snapshot, memory_order_relaxed);
     }
-    snapshot = atomic_exchange_explicit(&dropped, 0, memory_order_relaxed);
-    if (snapshot && __android_log_is_loggable_len(ANDROID_LOG_INFO, "liblog", strlen("liblog"),
-                                                  ANDROID_LOG_VERBOSE)) {
-      android_log_event_int_t buffer;
+  }
+  snapshot = atomic_exchange_explicit(&dropped, 0, memory_order_relaxed);
+  if (snapshot && __android_log_is_loggable_len(ANDROID_LOG_INFO, "liblog", strlen("liblog"),
+                                                ANDROID_LOG_VERBOSE)) {
+    android_log_event_int_t buffer;
 
-      header.id = LOG_ID_EVENTS;
-      buffer.header.tag = LIBLOG_LOG_TAG;
-      buffer.payload.type = EVENT_TYPE_INT;
-      buffer.payload.data = snapshot;
+    header.id = LOG_ID_EVENTS;
+    buffer.header.tag = LIBLOG_LOG_TAG;
+    buffer.payload.type = EVENT_TYPE_INT;
+    buffer.payload.data = snapshot;
 
-      newVec[headerLength].iov_base = &buffer;
-      newVec[headerLength].iov_len = sizeof(buffer);
+    newVec[headerLength].iov_base = &buffer;
+    newVec[headerLength].iov_len = sizeof(buffer);
 
-      ret = TEMP_FAILURE_RETRY(writev(sock, newVec, 2));
-      if (ret != (ssize_t)(sizeof(header) + sizeof(buffer))) {
-        atomic_fetch_add_explicit(&dropped, snapshot, memory_order_relaxed);
-      }
+    ret = TEMP_FAILURE_RETRY(writev(logd_socket, newVec, 2));
+    if (ret != (ssize_t)(sizeof(header) + sizeof(buffer))) {
+      atomic_fetch_add_explicit(&dropped, snapshot, memory_order_relaxed);
     }
   }
 
@@ -226,49 +178,26 @@
     }
   }
 
-  /*
-   * The write below could be lost, but will never block.
-   *
-   * ENOTCONN occurs if logd has died.
-   * ENOENT occurs if logd is not running and socket is missing.
-   * ECONNREFUSED occurs if we can not reconnect to logd.
-   * EAGAIN occurs if logd is overloaded.
-   */
-  if (sock < 0) {
-    ret = sock;
-  } else {
-    ret = TEMP_FAILURE_RETRY(writev(sock, newVec, i));
-    if (ret < 0) {
-      ret = -errno;
-    }
+  // The write below could be lost, but will never block.
+  // EAGAIN occurs if logd is overloaded, other errors indicate that something went wrong with
+  // the connection, so we reset it and try again.
+  ret = TEMP_FAILURE_RETRY(writev(logd_socket, newVec, i));
+  if (ret < 0 && errno != EAGAIN) {
+    int old_socket = logd_socket;
+    lock.unlock();
+    ResetSocket(old_socket);
+    lock.lock();
+
+    ret = TEMP_FAILURE_RETRY(writev(logd_socket, newVec, i));
   }
-  switch (ret) {
-    case -ENOTCONN:
-    case -ECONNREFUSED:
-    case -ENOENT:
-      if (__android_log_trylock()) {
-        return ret; /* in a signal handler? try again when less stressed */
-      }
-      __logdClose(ret);
-      ret = logdOpen();
-      __android_log_unlock();
 
-      if (ret < 0) {
-        return ret;
-      }
-
-      ret = TEMP_FAILURE_RETRY(writev(atomic_load(&logdLoggerWrite.context.sock), newVec, i));
-      if (ret < 0) {
-        ret = -errno;
-      }
-      [[fallthrough]];
-    default:
-      break;
+  if (ret < 0) {
+    ret = -errno;
   }
 
   if (ret > (ssize_t)sizeof(header)) {
     ret -= sizeof(header);
-  } else if (ret == -EAGAIN) {
+  } else if (ret < 0) {
     atomic_fetch_add_explicit(&dropped, 1, memory_order_relaxed);
     if (logId == LOG_ID_SECURITY) {
       atomic_fetch_add_explicit(&droppedSecurity, 1, memory_order_relaxed);
diff --git a/adb/daemon/set_verity_enable_state_service.h b/liblog/logd_writer.h
similarity index 73%
copy from adb/daemon/set_verity_enable_state_service.h
copy to liblog/logd_writer.h
index c0ed98e..41197b5 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/liblog/logd_writer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,9 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <stddef.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#include <android/log.h>
+
+int LogdWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
+void LogdClose();
diff --git a/liblog/logger.h b/liblog/logger.h
index 8cae66c..ddff19d 100644
--- a/liblog/logger.h
+++ b/liblog/logger.h
@@ -17,132 +17,35 @@
 #pragma once
 
 #include <stdatomic.h>
+#include <sys/cdefs.h>
 
-#include <cutils/list.h>
 #include <log/log.h>
 
-#include "log_portability.h"
 #include "uio.h"
 
 __BEGIN_DECLS
 
-/* Union, sock or fd of zero is not allowed unless static initialized */
-union android_log_context_union {
-  void* priv;
-  atomic_int sock;
+struct logger_list {
   atomic_int fd;
-};
-
-struct android_log_transport_write {
-  const char* name;                  /* human name to describe the transport */
-  unsigned logMask;                  /* mask cache of available() success */
-  union android_log_context_union context; /* Initialized by static allocation */
-
-  int (*available)(log_id_t logId); /* Does not cause resources to be taken */
-  int (*open)();   /* can be called multiple times, reusing current resources */
-  void (*close)(); /* free up resources */
-  /* write log to transport, returns number of bytes propagated, or -errno */
-  int (*write)(log_id_t logId, struct timespec* ts, struct iovec* vec,
-               size_t nr);
-};
-
-struct android_log_logger_list;
-struct android_log_transport_context;
-struct android_log_logger;
-
-struct android_log_transport_read {
-  const char* name; /* human name to describe the transport */
-
-  /* Does not cause resources to be taken */
-  int (*available)(log_id_t logId);
-  int (*version)(struct android_log_logger* logger,
-                 struct android_log_transport_context* transp);
-  /* Release resources taken by the following interfaces */
-  void (*close)(struct android_log_logger_list* logger_list,
-                struct android_log_transport_context* transp);
-  /*
-   * Expect all to instantiate open automagically on any call,
-   * so we do not have an explicit open call.
-   */
-  int (*read)(struct android_log_logger_list* logger_list,
-              struct android_log_transport_context* transp,
-              struct log_msg* log_msg);
-  /* Must only be called if not ANDROID_LOG_NONBLOCK (blocking) */
-  int (*poll)(struct android_log_logger_list* logger_list,
-              struct android_log_transport_context* transp);
-
-  int (*clear)(struct android_log_logger* logger,
-               struct android_log_transport_context* transp);
-  ssize_t (*setSize)(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp, size_t size);
-  ssize_t (*getSize)(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-  ssize_t (*getReadableSize)(struct android_log_logger* logger,
-                             struct android_log_transport_context* transp);
-
-  ssize_t (*getPrune)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-  ssize_t (*setPrune)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-  ssize_t (*getStats)(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp, char* buf,
-                      size_t len);
-};
-
-struct android_log_transport_context {
-  union android_log_context_union context; /* zero init per-transport context */
-
-  struct android_log_transport_read* transport;
-  unsigned logMask;      /* mask of requested log buffers */
-  int ret;               /* return value associated with following data */
-  struct log_msg logMsg; /* peek at upcoming data, valid if logMsg.len != 0 */
-};
-
-struct android_log_logger_list {
-  struct listnode logger;
-  android_log_transport_context transport_context;
-  bool transport_initialized;
   int mode;
   unsigned int tail;
   log_time start;
   pid_t pid;
+  uint32_t log_mask;
 };
 
-struct android_log_logger {
-  struct listnode node;
-  struct android_log_logger_list* parent;
+// Format for a 'logger' entry: uintptr_t where only the bottom 32 bits are used.
+// bit 31: Set if this 'logger' is for logd.
+// bit 30: Set if this 'logger' is for pmsg
+// bits 0-2: the decimal value of the log buffer.
+// Other bits are unused.
 
-  log_id_t logId;
-};
+#define LOGGER_LOGD (1U << 31)
+#define LOGGER_PMSG (1U << 30)
+#define LOGGER_LOG_ID_MASK ((1U << 3) - 1)
 
-/* assumes caller has structures read-locked, single threaded, or fenced */
-#define logger_for_each(logp, logger_list)                          \
-  for ((logp) = node_to_item((logger_list)->logger.next,            \
-                             struct android_log_logger, node);      \
-       ((logp) != node_to_item(&(logger_list)->logger,              \
-                               struct android_log_logger, node)) && \
-       ((logp)->parent == (logger_list));                           \
-       (logp) =                                                     \
-           node_to_item((logp)->node.next, struct android_log_logger, node))
-
-/* OS specific dribs and drabs */
-
-#if defined(_WIN32)
-#include <private/android_filesystem_config.h>
-typedef uint32_t uid_t;
-static inline uid_t __android_log_uid() {
-  return AID_SYSTEM;
+inline bool android_logger_is_logd(struct logger* logger) {
+  return reinterpret_cast<uintptr_t>(logger) & LOGGER_LOGD;
 }
-#else
-static inline uid_t __android_log_uid() {
-  return getuid();
-}
-#endif
-
-void __android_log_lock();
-int __android_log_trylock();
-void __android_log_unlock();
 
 __END_DECLS
diff --git a/liblog/logger_lock.cpp b/liblog/logger_lock.cpp
deleted file mode 100644
index 4636b00..0000000
--- a/liblog/logger_lock.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2007-2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * Some OS specific dribs and drabs (locking etc).
- */
-
-#if !defined(_WIN32)
-#include <pthread.h>
-#endif
-
-#include "logger.h"
-
-#if !defined(_WIN32)
-static pthread_mutex_t log_init_lock = PTHREAD_MUTEX_INITIALIZER;
-#endif
-
-void __android_log_lock() {
-#if !defined(_WIN32)
-  /*
-   * If we trigger a signal handler in the middle of locked activity and the
-   * signal handler logs a message, we could get into a deadlock state.
-   */
-  pthread_mutex_lock(&log_init_lock);
-#endif
-}
-
-int __android_log_trylock() {
-#if !defined(_WIN32)
-  return pthread_mutex_trylock(&log_init_lock);
-#else
-  return 0;
-#endif
-}
-
-void __android_log_unlock() {
-#if !defined(_WIN32)
-  pthread_mutex_unlock(&log_init_lock);
-#endif
-}
diff --git a/liblog/logger_name.cpp b/liblog/logger_name.cpp
index ece0550..7d676f4 100644
--- a/liblog/logger_name.cpp
+++ b/liblog/logger_name.cpp
@@ -19,8 +19,6 @@
 
 #include <log/log.h>
 
-#include "log_portability.h"
-
 /* In the future, we would like to make this list extensible */
 static const char* LOG_NAME[LOG_ID_MAX] = {
     /* clang-format off */
diff --git a/liblog/logger_read.cpp b/liblog/logger_read.cpp
index ff816b7..4937042 100644
--- a/liblog/logger_read.cpp
+++ b/liblog/logger_read.cpp
@@ -21,233 +21,56 @@
 #include <pthread.h>
 #include <sched.h>
 #include <stddef.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <android/log.h>
-#include <cutils/list.h>
-#include <private/android_filesystem_config.h>
 
-#include "log_portability.h"
+#include "logd_reader.h"
 #include "logger.h"
-
-/* android_logger_alloc unimplemented, no use case */
-/* android_logger_free not exported */
-static void android_logger_free(struct logger* logger) {
-  struct android_log_logger* logger_internal = (struct android_log_logger*)logger;
-
-  if (!logger_internal) {
-    return;
-  }
-
-  list_remove(&logger_internal->node);
-
-  free(logger_internal);
-}
-
-/* android_logger_alloc unimplemented, no use case */
+#include "pmsg_reader.h"
 
 /* method for getting the associated sublog id */
 log_id_t android_logger_get_id(struct logger* logger) {
-  return ((struct android_log_logger*)logger)->logId;
+  return static_cast<log_id_t>(reinterpret_cast<uintptr_t>(logger) & LOGGER_LOG_ID_MASK);
 }
 
-static int init_transport_context(struct android_log_logger_list* logger_list) {
+static struct logger_list* android_logger_list_alloc_internal(int mode, unsigned int tail,
+                                                              log_time start, pid_t pid) {
+  auto* logger_list = static_cast<struct logger_list*>(calloc(1, sizeof(struct logger_list)));
   if (!logger_list) {
-    return -EINVAL;
+    return nullptr;
   }
 
-  if (list_empty(&logger_list->logger)) {
-    return -EINVAL;
-  }
-
-  if (logger_list->transport_initialized) {
-    return 0;
-  }
-
-#if (FAKE_LOG_DEVICE == 0)
-  extern struct android_log_transport_read logdLoggerRead;
-  extern struct android_log_transport_read pmsgLoggerRead;
-
-  struct android_log_transport_read* transport;
-  transport = (logger_list->mode & ANDROID_LOG_PSTORE) ? &pmsgLoggerRead : &logdLoggerRead;
-
-  struct android_log_logger* logger;
-  unsigned logMask = 0;
-
-  logger_for_each(logger, logger_list) {
-    log_id_t logId = logger->logId;
-
-    if (logId == LOG_ID_SECURITY && __android_log_uid() != AID_SYSTEM) {
-      continue;
-    }
-    if (transport->read && (!transport->available || transport->available(logId) >= 0)) {
-      logMask |= 1 << logId;
-    }
-  }
-  if (!logMask) {
-    return -ENODEV;
-  }
-
-  logger_list->transport_context.transport = transport;
-  logger_list->transport_context.logMask = logMask;
-  logger_list->transport_context.ret = 1;
-#endif
-  return 0;
-}
-
-#define LOGGER_FUNCTION(logger, def, func, args...)                                               \
-  ssize_t ret = -EINVAL;                                                                          \
-  android_log_logger* logger_internal = reinterpret_cast<android_log_logger*>(logger);            \
-                                                                                                  \
-  if (!logger_internal) {                                                                         \
-    return ret;                                                                                   \
-  }                                                                                               \
-  ret = init_transport_context(logger_internal->parent);                                          \
-  if (ret < 0) {                                                                                  \
-    return ret;                                                                                   \
-  }                                                                                               \
-                                                                                                  \
-  ret = (def);                                                                                    \
-  android_log_transport_context* transport_context = &logger_internal->parent->transport_context; \
-  if (transport_context->logMask & (1 << logger_internal->logId) &&                               \
-      transport_context->transport && transport_context->transport->func) {                       \
-    ssize_t retval =                                                                              \
-        (transport_context->transport->func)(logger_internal, transport_context, ##args);         \
-    if (ret >= 0 || ret == (def)) {                                                               \
-      ret = retval;                                                                               \
-    }                                                                                             \
-  }                                                                                               \
-  return ret
-
-int android_logger_clear(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, clear);
-}
-
-/* returns the total size of the log's ring buffer */
-long android_logger_get_log_size(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, getSize);
-}
-
-int android_logger_set_log_size(struct logger* logger, unsigned long size) {
-  LOGGER_FUNCTION(logger, -ENODEV, setSize, size);
-}
-
-/*
- * returns the readable size of the log's ring buffer (that is, amount of the
- * log consumed)
- */
-long android_logger_get_log_readable_size(struct logger* logger) {
-  LOGGER_FUNCTION(logger, -ENODEV, getReadableSize);
-}
-
-/*
- * returns the logger version
- */
-int android_logger_get_log_version(struct logger* logger) {
-  LOGGER_FUNCTION(logger, 4, version);
-}
-
-#define LOGGER_LIST_FUNCTION(logger_list, def, func, args...)                                  \
-  android_log_logger_list* logger_list_internal =                                              \
-      reinterpret_cast<android_log_logger_list*>(logger_list);                                 \
-                                                                                               \
-  ssize_t ret = init_transport_context(logger_list_internal);                                  \
-  if (ret < 0) {                                                                               \
-    return ret;                                                                                \
-  }                                                                                            \
-                                                                                               \
-  ret = (def);                                                                                 \
-  android_log_transport_context* transport_context = &logger_list_internal->transport_context; \
-  if (transport_context->transport && transport_context->transport->func) {                    \
-    ssize_t retval =                                                                           \
-        (transport_context->transport->func)(logger_list_internal, transport_context, ##args); \
-    if (ret >= 0 || ret == (def)) {                                                            \
-      ret = retval;                                                                            \
-    }                                                                                          \
-  }                                                                                            \
-  return ret
-
-/*
- * returns statistics
- */
-ssize_t android_logger_get_statistics(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getStats, buf, len);
-}
-
-ssize_t android_logger_get_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getPrune, buf, len);
-}
-
-int android_logger_set_prune_list(struct logger_list* logger_list, char* buf, size_t len) {
-  LOGGER_LIST_FUNCTION(logger_list, -ENODEV, setPrune, buf, len);
-}
-
-struct logger_list* android_logger_list_alloc(int mode, unsigned int tail, pid_t pid) {
-  struct android_log_logger_list* logger_list;
-
-  logger_list = static_cast<android_log_logger_list*>(calloc(1, sizeof(*logger_list)));
-  if (!logger_list) {
-    return NULL;
-  }
-
-  list_init(&logger_list->logger);
   logger_list->mode = mode;
+  logger_list->start = start;
   logger_list->tail = tail;
   logger_list->pid = pid;
 
-  return (struct logger_list*)logger_list;
+  return logger_list;
+}
+
+struct logger_list* android_logger_list_alloc(int mode, unsigned int tail, pid_t pid) {
+  return android_logger_list_alloc_internal(mode, tail, log_time(0, 0), pid);
 }
 
 struct logger_list* android_logger_list_alloc_time(int mode, log_time start, pid_t pid) {
-  struct android_log_logger_list* logger_list;
-
-  logger_list = static_cast<android_log_logger_list*>(calloc(1, sizeof(*logger_list)));
-  if (!logger_list) {
-    return NULL;
-  }
-
-  list_init(&logger_list->logger);
-  logger_list->mode = mode;
-  logger_list->start = start;
-  logger_list->pid = pid;
-
-  return (struct logger_list*)logger_list;
+  return android_logger_list_alloc_internal(mode, 0, start, pid);
 }
 
-/* android_logger_list_register unimplemented, no use case */
-/* android_logger_list_unregister unimplemented, no use case */
-
 /* Open the named log and add it to the logger list */
 struct logger* android_logger_open(struct logger_list* logger_list, log_id_t logId) {
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-  struct android_log_logger* logger;
-
-  if (!logger_list_internal || (logId >= LOG_ID_MAX)) {
+  if (!logger_list || (logId >= LOG_ID_MAX)) {
     return nullptr;
   }
 
-  logger_for_each(logger, logger_list_internal) {
-    if (logger->logId == logId) {
-      return reinterpret_cast<struct logger*>(logger);
-    }
-  }
+  logger_list->log_mask |= 1 << logId;
 
-  logger = static_cast<android_log_logger*>(calloc(1, sizeof(*logger)));
-  if (!logger) {
-    return nullptr;
-  }
-
-  logger->logId = logId;
-  list_add_tail(&logger_list_internal->logger, &logger->node);
-  logger->parent = logger_list_internal;
-
-  // Reset known transport to re-evaluate, since we added a new logger.
-  logger_list_internal->transport_initialized = false;
-
-  return (struct logger*)logger;
+  uintptr_t logger = logId;
+  logger |= (logger_list->mode & ANDROID_LOG_PSTORE) ? LOGGER_PMSG : LOGGER_LOGD;
+  return reinterpret_cast<struct logger*>(logger);
 }
 
 /* Open the single named log and make it part of a new logger list */
@@ -267,79 +90,60 @@
   return logger_list;
 }
 
-/* Validate log_msg packet, read function has already been null checked */
-static int android_transport_read(struct android_log_logger_list* logger_list,
-                                  struct android_log_transport_context* transp,
-                                  struct log_msg* log_msg) {
-  int ret = (*transp->transport->read)(logger_list, transp, log_msg);
-
-  if (ret > (int)sizeof(*log_msg)) {
-    ret = sizeof(*log_msg);
-  }
-
-  transp->ret = ret;
-
-  /* propagate errors, or make sure len & hdr_size members visible */
-  if (ret < (int)(sizeof(log_msg->entry.len) + sizeof(log_msg->entry.hdr_size))) {
-    if (ret >= (int)sizeof(log_msg->entry.len)) {
-      log_msg->entry.len = 0;
-    }
-    return ret;
-  }
-
-  /* hdr_size correction (logger_entry -> logger_entry_v2+ conversion) */
-  if (log_msg->entry_v2.hdr_size == 0) {
-    log_msg->entry_v2.hdr_size = sizeof(struct logger_entry);
-  }
-  if ((log_msg->entry_v2.hdr_size < sizeof(log_msg->entry_v1)) ||
-      (log_msg->entry_v2.hdr_size > sizeof(log_msg->entry))) {
+int android_logger_list_read(struct logger_list* logger_list, struct log_msg* log_msg) {
+  if (logger_list == nullptr || logger_list->log_mask == 0) {
     return -EINVAL;
   }
 
-  /* len validation */
-  if (ret <= log_msg->entry_v2.hdr_size) {
-    log_msg->entry.len = 0;
+  int ret = 0;
+
+#ifdef __ANDROID__
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    ret = PmsgRead(logger_list, log_msg);
   } else {
-    log_msg->entry.len = ret - log_msg->entry_v2.hdr_size;
+    ret = LogdRead(logger_list, log_msg);
   }
+#endif
+
+  if (ret <= 0) {
+    return ret;
+  }
+
+  if (ret > LOGGER_ENTRY_MAX_LEN) {
+    ret = LOGGER_ENTRY_MAX_LEN;
+  }
+
+  if (ret < static_cast<int>(sizeof(log_msg->entry))) {
+    return -EINVAL;
+  }
+
+  if (log_msg->entry.hdr_size < sizeof(log_msg->entry) ||
+      log_msg->entry.hdr_size >= LOGGER_ENTRY_MAX_LEN - sizeof(log_msg->entry)) {
+    return -EINVAL;
+  }
+
+  if (log_msg->entry.len > ret - log_msg->entry.hdr_size) {
+    return -EINVAL;
+  }
+
+  log_msg->buf[log_msg->entry.len + log_msg->entry.hdr_size] = '\0';
 
   return ret;
 }
 
-/* Read from the selected logs */
-int android_logger_list_read(struct logger_list* logger_list, struct log_msg* log_msg) {
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-
-  int ret = init_transport_context(logger_list_internal);
-  if (ret < 0) {
-    return ret;
-  }
-
-  android_log_transport_context* transport_context = &logger_list_internal->transport_context;
-  return android_transport_read(logger_list_internal, transport_context, log_msg);
-}
-
 /* Close all the logs */
 void android_logger_list_free(struct logger_list* logger_list) {
-  struct android_log_logger_list* logger_list_internal =
-      (struct android_log_logger_list*)logger_list;
-
-  if (logger_list_internal == NULL) {
+  if (logger_list == NULL) {
     return;
   }
 
-  android_log_transport_context* transport_context = &logger_list_internal->transport_context;
-
-  if (transport_context->transport && transport_context->transport->close) {
-    (*transport_context->transport->close)(logger_list_internal, transport_context);
+#ifdef __ANDROID__
+  if (logger_list->mode & ANDROID_LOG_PSTORE) {
+    PmsgClose(logger_list);
+  } else {
+    LogdClose(logger_list);
   }
+#endif
 
-  while (!list_empty(&logger_list_internal->logger)) {
-    struct listnode* node = list_head(&logger_list_internal->logger);
-    struct android_log_logger* logger = node_to_item(node, struct android_log_logger, node);
-    android_logger_free((struct logger*)logger);
-  }
-
-  free(logger_list_internal);
+  free(logger_list);
 }
diff --git a/liblog/logger_write.cpp b/liblog/logger_write.cpp
index e1772f1..cf82e0f 100644
--- a/liblog/logger_write.cpp
+++ b/liblog/logger_write.cpp
@@ -14,8 +14,11 @@
  * limitations under the License.
  */
 
+#include "logger_write.h"
+
 #include <errno.h>
-#include <stdatomic.h>
+#include <inttypes.h>
+#include <libgen.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/time.h>
@@ -24,35 +27,39 @@
 #include <android/set_abort_message.h>
 #endif
 
-#include <log/event_tag_map.h>
+#include <shared_mutex>
+
+#include <android-base/errno_restorer.h>
+#include <android-base/macros.h>
 #include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "log_portability.h"
+#include "android/log.h"
+#include "log/log_read.h"
 #include "logger.h"
+#include "rwlock.h"
 #include "uio.h"
 
+#ifdef __ANDROID__
+#include "logd_writer.h"
+#include "pmsg_writer.h"
+#endif
+
+#if defined(__APPLE__)
+#include <pthread.h>
+#elif defined(__linux__) && !defined(__ANDROID__)
+#include <syscall.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#endif
+
+using android::base::ErrnoRestorer;
+
 #define LOG_BUF_SIZE 1024
 
-#if (FAKE_LOG_DEVICE == 0)
-extern struct android_log_transport_write logdLoggerWrite;
-extern struct android_log_transport_write pmsgLoggerWrite;
-
-android_log_transport_write* android_log_write = &logdLoggerWrite;
-android_log_transport_write* android_log_persist_write = &pmsgLoggerWrite;
-#else
-extern android_log_transport_write fakeLoggerWrite;
-
-android_log_transport_write* android_log_write = &fakeLoggerWrite;
-android_log_transport_write* android_log_persist_write = nullptr;
-#endif
-
-static int __write_to_log_init(log_id_t, struct iovec* vec, size_t nr);
-static int (*write_to_log)(log_id_t, struct iovec* vec, size_t nr) = __write_to_log_init;
-
-static int check_log_uid_permissions() {
 #if defined(__ANDROID__)
-  uid_t uid = __android_log_uid();
+static int check_log_uid_permissions() {
+  uid_t uid = getuid();
 
   /* Matches clientHasLogCredentials() in logd */
   if ((uid != AID_SYSTEM) && (uid != AID_ROOT) && (uid != AID_LOG)) {
@@ -88,275 +95,276 @@
       }
     }
   }
-#endif
   return 0;
 }
-
-static void __android_log_cache_available(struct android_log_transport_write* node) {
-  uint32_t i;
-
-  if (node->logMask) {
-    return;
-  }
-
-  for (i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
-    if (i != LOG_ID_KERNEL && (i != LOG_ID_SECURITY || check_log_uid_permissions() == 0) &&
-        (*node->available)(static_cast<log_id_t>(i)) >= 0) {
-      node->logMask |= 1 << i;
-    }
-  }
-}
-
-#if defined(__ANDROID__)
-static atomic_uintptr_t tagMap;
 #endif
 
 /*
  * Release any logger resources. A new log write will immediately re-acquire.
  */
 void __android_log_close() {
-#if defined(__ANDROID__)
-  EventTagMap* m;
-#endif
-
-  __android_log_lock();
-
-  write_to_log = __write_to_log_init;
-
-  /*
-   * Threads that are actively writing at this point are not held back
-   * by a lock and are at risk of dropping the messages with a return code
-   * -EBADF. Prefer to return error code than add the overhead of a lock to
-   * each log writing call to guarantee delivery. In addition, anyone
-   * calling this is doing so to release the logging resources and shut down,
-   * for them to do so with outstanding log requests in other threads is a
-   * disengenuous use of this function.
-   */
-
-  if (android_log_write != nullptr) {
-    android_log_write->close();
-  }
-
-  if (android_log_persist_write != nullptr) {
-    android_log_persist_write->close();
-  }
-
-#if defined(__ANDROID__)
-  /*
-   * Additional risk here somewhat mitigated by immediately unlock flushing
-   * the processor cache. The multi-threaded race that we choose to accept,
-   * to minimize locking, is an atomic_load in a writer picking up a value
-   * just prior to entering this routine. There will be an use after free.
-   *
-   * Again, anyone calling this is doing so to release the logging resources
-   * is most probably going to quiesce then shut down; or to restart after
-   * a fork so the risk should be non-existent. For this reason we
-   * choose a mitigation stance for efficiency instead of incuring the cost
-   * of a lock for every log write.
-   */
-  m = (EventTagMap*)atomic_exchange(&tagMap, (uintptr_t)0);
-#endif
-
-  __android_log_unlock();
-
-#if defined(__ANDROID__)
-  if (m != (EventTagMap*)(uintptr_t)-1LL) android_closeEventTagMap(m);
+#ifdef __ANDROID__
+  LogdClose();
+  PmsgClose();
 #endif
 }
 
-static bool transport_initialize(android_log_transport_write* transport) {
-  if (transport == nullptr) {
-    return false;
+#if defined(__GLIBC__) || defined(_WIN32)
+static const char* getprogname() {
+#if defined(__GLIBC__)
+  return program_invocation_short_name;
+#elif defined(_WIN32)
+  static bool first = true;
+  static char progname[MAX_PATH] = {};
+
+  if (first) {
+    char path[PATH_MAX + 1];
+    DWORD result = GetModuleFileName(nullptr, path, sizeof(path) - 1);
+    if (result == 0 || result == sizeof(path) - 1) return "";
+    path[PATH_MAX - 1] = 0;
+
+    char* path_basename = basename(path);
+
+    snprintf(progname, sizeof(progname), "%s", path_basename);
+    first = false;
   }
 
-  __android_log_cache_available(transport);
-  if (!transport->logMask) {
-    return false;
-  }
+  return progname;
+#endif
+}
+#endif
 
-  // TODO: Do we actually need to call close() if open() fails?
-  if (transport->open() < 0) {
-    transport->close();
-    return false;
-  }
+// It's possible for logging to happen during static initialization before our globals are
+// initialized, so we place this std::string in a function such that it is initialized on the first
+// call.
+std::string& GetDefaultTag() {
+  static std::string default_tag = getprogname();
+  return default_tag;
+}
+RwLock default_tag_lock;
 
-  return true;
+void __android_log_set_default_tag(const char* tag) {
+  auto lock = std::unique_lock{default_tag_lock};
+  GetDefaultTag().assign(tag, 0, LOGGER_ENTRY_MAX_PAYLOAD);
 }
 
-/* log_init_lock assumed */
-static int __write_to_log_initialize() {
-  if (!transport_initialize(android_log_write)) {
-    return -ENODEV;
-  }
-
-  transport_initialize(android_log_persist_write);
-
-  return 1;
+static int minimum_log_priority = ANDROID_LOG_DEFAULT;
+int __android_log_set_minimum_priority(int priority) {
+  int old_minimum_log_priority = minimum_log_priority;
+  minimum_log_priority = priority;
+  return old_minimum_log_priority;
 }
 
-static int __write_to_log_daemon(log_id_t log_id, struct iovec* vec, size_t nr) {
-  int ret, save_errno;
+int __android_log_get_minimum_priority() {
+  return minimum_log_priority;
+}
+
+#ifdef __ANDROID__
+static __android_logger_function logger_function = __android_log_logd_logger;
+#else
+static __android_logger_function logger_function = __android_log_stderr_logger;
+#endif
+static RwLock logger_function_lock;
+
+void __android_log_set_logger(__android_logger_function logger) {
+  auto lock = std::unique_lock{logger_function_lock};
+  logger_function = logger;
+}
+
+void __android_log_default_aborter(const char* abort_message) {
+#ifdef __ANDROID__
+  android_set_abort_message(abort_message);
+#else
+  UNUSED(abort_message);
+#endif
+  abort();
+}
+
+static __android_aborter_function aborter_function = __android_log_default_aborter;
+static RwLock aborter_function_lock;
+
+void __android_log_set_aborter(__android_aborter_function aborter) {
+  auto lock = std::unique_lock{aborter_function_lock};
+  aborter_function = aborter;
+}
+
+void __android_log_call_aborter(const char* abort_message) {
+  auto lock = std::shared_lock{aborter_function_lock};
+  aborter_function(abort_message);
+}
+
+#ifdef __ANDROID__
+static int write_to_log(log_id_t log_id, struct iovec* vec, size_t nr) {
+  int ret;
   struct timespec ts;
 
-  save_errno = errno;
-#if defined(__ANDROID__)
+  if (log_id == LOG_ID_KERNEL) {
+    return -EINVAL;
+  }
+
   clock_gettime(android_log_clockid(), &ts);
 
   if (log_id == LOG_ID_SECURITY) {
     if (vec[0].iov_len < 4) {
-      errno = save_errno;
       return -EINVAL;
     }
 
     ret = check_log_uid_permissions();
     if (ret < 0) {
-      errno = save_errno;
       return ret;
     }
     if (!__android_log_security()) {
       /* If only we could reset downstream logd counter */
-      errno = save_errno;
       return -EPERM;
     }
   } else if (log_id == LOG_ID_EVENTS || log_id == LOG_ID_STATS) {
-    const char* tag;
-    size_t len;
-    EventTagMap *m, *f;
-
     if (vec[0].iov_len < 4) {
-      errno = save_errno;
       return -EINVAL;
     }
-
-    tag = NULL;
-    len = 0;
-    f = NULL;
-    m = (EventTagMap*)atomic_load(&tagMap);
-
-    if (!m) {
-      ret = __android_log_trylock();
-      m = (EventTagMap*)atomic_load(&tagMap); /* trylock flush cache */
-      if (!m) {
-        m = android_openEventTagMap(NULL);
-        if (ret) { /* trylock failed, use local copy, mark for close */
-          f = m;
-        } else {
-          if (!m) { /* One chance to open map file */
-            m = (EventTagMap*)(uintptr_t)-1LL;
-          }
-          atomic_store(&tagMap, (uintptr_t)m);
-        }
-      }
-      if (!ret) { /* trylock succeeded, unlock */
-        __android_log_unlock();
-      }
-    }
-    if (m && (m != (EventTagMap*)(uintptr_t)-1LL)) {
-      tag = android_lookupEventTag_len(m, &len, *static_cast<uint32_t*>(vec[0].iov_base));
-    }
-    ret = __android_log_is_loggable_len(ANDROID_LOG_INFO, tag, len, ANDROID_LOG_VERBOSE);
-    if (f) { /* local copy marked for close */
-      android_closeEventTagMap(f);
-    }
-    if (!ret) {
-      errno = save_errno;
-      return -EPERM;
-    }
-  } else {
-    int prio = *static_cast<int*>(vec[0].iov_base);
-    const char* tag = static_cast<const char*>(vec[1].iov_base);
-    size_t len = vec[1].iov_len;
-
-    if (!__android_log_is_loggable_len(prio, tag, len - 1, ANDROID_LOG_VERBOSE)) {
-      errno = save_errno;
-      return -EPERM;
-    }
-  }
-#else
-  /* simulate clock_gettime(CLOCK_REALTIME, &ts); */
-  {
-    struct timeval tv;
-    gettimeofday(&tv, NULL);
-    ts.tv_sec = tv.tv_sec;
-    ts.tv_nsec = tv.tv_usec * 1000;
-  }
-#endif
-
-  ret = 0;
-  size_t i = 1 << log_id;
-
-  if (android_log_write != nullptr && (android_log_write->logMask & i)) {
-    ssize_t retval;
-    retval = android_log_write->write(log_id, &ts, vec, nr);
-    if (ret >= 0) {
-      ret = retval;
-    }
   }
 
-  if (android_log_persist_write != nullptr && (android_log_persist_write->logMask & i)) {
-    android_log_persist_write->write(log_id, &ts, vec, nr);
-  }
+  ret = LogdWrite(log_id, &ts, vec, nr);
+  PmsgWrite(log_id, &ts, vec, nr);
 
-  errno = save_errno;
   return ret;
 }
+#else
+static int write_to_log(log_id_t, struct iovec*, size_t) {
+  // Non-Android text logs should go to __android_log_stderr_logger, not here.
+  // Non-Android binary logs are always dropped.
+  return 1;
+}
+#endif
 
-static int __write_to_log_init(log_id_t log_id, struct iovec* vec, size_t nr) {
-  int ret, save_errno = errno;
+// Copied from base/threads.cpp
+static uint64_t GetThreadId() {
+#if defined(__BIONIC__)
+  return gettid();
+#elif defined(__APPLE__)
+  uint64_t tid;
+  pthread_threadid_np(NULL, &tid);
+  return tid;
+#elif defined(__linux__)
+  return syscall(__NR_gettid);
+#elif defined(_WIN32)
+  return GetCurrentThreadId();
+#endif
+}
 
-  __android_log_lock();
+void __android_log_stderr_logger(const struct __android_logger_data* logger_data,
+                                 const char* message) {
+  struct tm now;
+  time_t t = time(nullptr);
 
-  if (write_to_log == __write_to_log_init) {
-    ret = __write_to_log_initialize();
-    if (ret < 0) {
-      __android_log_unlock();
-      errno = save_errno;
-      return ret;
-    }
+#if defined(_WIN32)
+  localtime_s(&now, &t);
+#else
+  localtime_r(&t, &now);
+#endif
 
-    write_to_log = __write_to_log_daemon;
+  char timestamp[32];
+  strftime(timestamp, sizeof(timestamp), "%m-%d %H:%M:%S", &now);
+
+  static const char log_characters[] = "XXVDIWEF";
+  static_assert(arraysize(log_characters) - 1 == ANDROID_LOG_SILENT,
+                "Mismatch in size of log_characters and values in android_LogPriority");
+  int priority =
+      logger_data->priority > ANDROID_LOG_SILENT ? ANDROID_LOG_FATAL : logger_data->priority;
+  char priority_char = log_characters[priority];
+  uint64_t tid = GetThreadId();
+
+  if (logger_data->file != nullptr) {
+    fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s:%u] %s\n",
+            logger_data->tag ? logger_data->tag : "nullptr", priority_char, timestamp, getpid(),
+            tid, logger_data->file, logger_data->line, message);
+  } else {
+    fprintf(stderr, "%s %c %s %5d %5" PRIu64 " %s\n",
+            logger_data->tag ? logger_data->tag : "nullptr", priority_char, timestamp, getpid(),
+            tid, message);
   }
+}
 
-  __android_log_unlock();
+void __android_log_logd_logger(const struct __android_logger_data* logger_data,
+                               const char* message) {
+  int buffer_id = logger_data->buffer_id == LOG_ID_DEFAULT ? LOG_ID_MAIN : logger_data->buffer_id;
 
-  ret = write_to_log(log_id, vec, nr);
-  errno = save_errno;
-  return ret;
+  struct iovec vec[3];
+  vec[0].iov_base =
+      const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(&logger_data->priority));
+  vec[0].iov_len = 1;
+  vec[1].iov_base = const_cast<void*>(static_cast<const void*>(logger_data->tag));
+  vec[1].iov_len = strlen(logger_data->tag) + 1;
+  vec[2].iov_base = const_cast<void*>(static_cast<const void*>(message));
+  vec[2].iov_len = strlen(message) + 1;
+
+  write_to_log(static_cast<log_id_t>(buffer_id), vec, 3);
 }
 
 int __android_log_write(int prio, const char* tag, const char* msg) {
   return __android_log_buf_write(LOG_ID_MAIN, prio, tag, msg);
 }
 
-int __android_log_buf_write(int bufID, int prio, const char* tag, const char* msg) {
-  if (!tag) tag = "";
+void __android_log_write_logger_data(__android_logger_data* logger_data, const char* msg) {
+  ErrnoRestorer errno_restorer;
+
+  if (logger_data->buffer_id != LOG_ID_DEFAULT && logger_data->buffer_id != LOG_ID_MAIN &&
+      logger_data->buffer_id != LOG_ID_SYSTEM && logger_data->buffer_id != LOG_ID_RADIO &&
+      logger_data->buffer_id != LOG_ID_CRASH) {
+    return;
+  }
+
+  auto tag_lock = std::shared_lock{default_tag_lock, std::defer_lock};
+  if (logger_data->tag == nullptr) {
+    tag_lock.lock();
+    logger_data->tag = GetDefaultTag().c_str();
+  }
 
 #if __BIONIC__
-  if (prio == ANDROID_LOG_FATAL) {
+  if (logger_data->priority == ANDROID_LOG_FATAL) {
     android_set_abort_message(msg);
   }
 #endif
 
-  struct iovec vec[3];
-  vec[0].iov_base = (unsigned char*)&prio;
-  vec[0].iov_len = 1;
-  vec[1].iov_base = (void*)tag;
-  vec[1].iov_len = strlen(tag) + 1;
-  vec[2].iov_base = (void*)msg;
-  vec[2].iov_len = strlen(msg) + 1;
+  auto lock = std::shared_lock{logger_function_lock};
+  logger_function(logger_data, msg);
+}
 
-  return write_to_log(static_cast<log_id_t>(bufID), vec, 3);
+int __android_log_buf_write(int bufID, int prio, const char* tag, const char* msg) {
+  ErrnoRestorer errno_restorer;
+
+  if (!__android_log_is_loggable(prio, tag, ANDROID_LOG_VERBOSE)) {
+    return 0;
+  }
+
+  __android_logger_data logger_data = {sizeof(__android_logger_data), bufID, prio, tag, nullptr, 0};
+  __android_log_write_logger_data(&logger_data, msg);
+  return 1;
 }
 
 int __android_log_vprint(int prio, const char* tag, const char* fmt, va_list ap) {
+  ErrnoRestorer errno_restorer;
+
+  if (!__android_log_is_loggable(prio, tag, ANDROID_LOG_VERBOSE)) {
+    return 0;
+  }
+
   char buf[LOG_BUF_SIZE];
 
   vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
 
-  return __android_log_write(prio, tag, buf);
+  __android_logger_data logger_data = {
+      sizeof(__android_logger_data), LOG_ID_MAIN, prio, tag, nullptr, 0};
+  __android_log_write_logger_data(&logger_data, buf);
+  return 1;
 }
 
 int __android_log_print(int prio, const char* tag, const char* fmt, ...) {
+  ErrnoRestorer errno_restorer;
+
+  if (!__android_log_is_loggable(prio, tag, ANDROID_LOG_VERBOSE)) {
+    return 0;
+  }
+
   va_list ap;
   char buf[LOG_BUF_SIZE];
 
@@ -364,10 +372,19 @@
   vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
   va_end(ap);
 
-  return __android_log_write(prio, tag, buf);
+  __android_logger_data logger_data = {
+      sizeof(__android_logger_data), LOG_ID_MAIN, prio, tag, nullptr, 0};
+  __android_log_write_logger_data(&logger_data, buf);
+  return 1;
 }
 
 int __android_log_buf_print(int bufID, int prio, const char* tag, const char* fmt, ...) {
+  ErrnoRestorer errno_restorer;
+
+  if (!__android_log_is_loggable(prio, tag, ANDROID_LOG_VERBOSE)) {
+    return 0;
+  }
+
   va_list ap;
   char buf[LOG_BUF_SIZE];
 
@@ -375,7 +392,9 @@
   vsnprintf(buf, LOG_BUF_SIZE, fmt, ap);
   va_end(ap);
 
-  return __android_log_buf_write(bufID, prio, tag, buf);
+  __android_logger_data logger_data = {sizeof(__android_logger_data), bufID, prio, tag, nullptr, 0};
+  __android_log_write_logger_data(&logger_data, buf);
+  return 1;
 }
 
 void __android_log_assert(const char* cond, const char* tag, const char* fmt, ...) {
@@ -403,11 +422,13 @@
   TEMP_FAILURE_RETRY(write(2, "\n", 1));
 
   __android_log_write(ANDROID_LOG_FATAL, tag, buf);
-  abort(); /* abort so we have a chance to debug the situation */
-           /* NOTREACHED */
+  __android_log_call_aborter(buf);
+  abort();
 }
 
 int __android_log_bwrite(int32_t tag, const void* payload, size_t len) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[2];
 
   vec[0].iov_base = &tag;
@@ -419,6 +440,8 @@
 }
 
 int __android_log_stats_bwrite(int32_t tag, const void* payload, size_t len) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[2];
 
   vec[0].iov_base = &tag;
@@ -430,6 +453,8 @@
 }
 
 int __android_log_security_bwrite(int32_t tag, const void* payload, size_t len) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[2];
 
   vec[0].iov_base = &tag;
@@ -446,6 +471,8 @@
  * handy if we just want to dump an integer into the log.
  */
 int __android_log_btwrite(int32_t tag, char type, const void* payload, size_t len) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[3];
 
   vec[0].iov_base = &tag;
@@ -463,6 +490,8 @@
  * event log.
  */
 int __android_log_bswrite(int32_t tag, const char* payload) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[4];
   char type = EVENT_TYPE_STRING;
   uint32_t len = strlen(payload);
@@ -484,6 +513,8 @@
  * security log.
  */
 int __android_log_security_bswrite(int32_t tag, const char* payload) {
+  ErrnoRestorer errno_restorer;
+
   struct iovec vec[4];
   char type = EVENT_TYPE_STRING;
   uint32_t len = strlen(payload);
diff --git a/adb/daemon/reboot_service.h b/liblog/logger_write.h
similarity index 77%
rename from adb/daemon/reboot_service.h
rename to liblog/logger_write.h
index f68913e..065fd55 100644
--- a/adb/daemon/reboot_service.h
+++ b/liblog/logger_write.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,8 +18,7 @@
 
 #include <string>
 
-#include "adb_unique_fd.h"
+#include "rwlock.h"
 
-#if defined(__ANDROID__)
-void reboot_service(unique_fd fd, const std::string& arg);
-#endif
+std::string& GetDefaultTag();  // Must read lock default_tag_lock
+extern RwLock default_tag_lock;
\ No newline at end of file
diff --git a/liblog/logprint.cpp b/liblog/logprint.cpp
index 82fbafd..e32878a 100644
--- a/liblog/logprint.cpp
+++ b/liblog/logprint.cpp
@@ -40,8 +40,6 @@
 #include <log/logprint.h>
 #include <private/android_logger.h>
 
-#include "log_portability.h"
-
 #define MS_PER_NSEC 1000000
 #define US_PER_NSEC 1000
 
@@ -532,18 +530,12 @@
 
   int i;
   char* msg = buf->msg;
-  struct logger_entry_v2* buf2 = (struct logger_entry_v2*)buf;
-  if (buf2->hdr_size) {
-    if ((buf2->hdr_size < sizeof(((struct log_msg*)NULL)->entry_v1)) ||
-        (buf2->hdr_size > sizeof(((struct log_msg*)NULL)->entry))) {
-      fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
-      return -1;
-    }
-    msg = ((char*)buf2) + buf2->hdr_size;
-    if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
-      entry->uid = ((struct logger_entry_v4*)buf)->uid;
-    }
+  if (buf->hdr_size != sizeof(struct logger_entry)) {
+    fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
+    return -1;
   }
+  entry->uid = buf->uid;
+
   for (i = 1; i < buf->len; i++) {
     if (msg[i] == '\0') {
       if (msgStart == -1) {
@@ -993,27 +985,15 @@
   entry->pid = buf->pid;
   entry->tid = buf->tid;
 
-  /*
-   * Pull the tag out, fill in some additional details based on incoming
-   * buffer version (v3 adds lid, v4 adds uid).
-   */
   eventData = (const unsigned char*)buf->msg;
-  struct logger_entry_v2* buf2 = (struct logger_entry_v2*)buf;
-  if (buf2->hdr_size) {
-    if ((buf2->hdr_size < sizeof(((struct log_msg*)NULL)->entry_v1)) ||
-        (buf2->hdr_size > sizeof(((struct log_msg*)NULL)->entry))) {
-      fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
-      return -1;
-    }
-    eventData = ((unsigned char*)buf2) + buf2->hdr_size;
-    if ((buf2->hdr_size >= sizeof(struct logger_entry_v3)) &&
-        (((struct logger_entry_v3*)buf)->lid == LOG_ID_SECURITY)) {
-      entry->priority = ANDROID_LOG_WARN;
-    }
-    if (buf2->hdr_size >= sizeof(struct logger_entry_v4)) {
-      entry->uid = ((struct logger_entry_v4*)buf)->uid;
-    }
+  if (buf->hdr_size != sizeof(struct logger_entry)) {
+    fprintf(stderr, "+++ LOG: entry illegal hdr_size\n");
+    return -1;
   }
+  if (buf->lid == LOG_ID_SECURITY) {
+    entry->priority = ANDROID_LOG_WARN;
+  }
+  entry->uid = buf->uid;
   inCount = buf->len;
   if (inCount < sizeof(android_event_header_t)) return -1;
   auto* event_header = reinterpret_cast<const android_event_header_t*>(eventData);
@@ -1069,9 +1049,6 @@
   if ((result == 1) && fmtStr) {
     /* We overflowed :-(, let's repaint the line w/o format dressings */
     eventData = (const unsigned char*)buf->msg;
-    if (buf2->hdr_size) {
-      eventData = ((unsigned char*)buf2) + buf2->hdr_size;
-    }
     eventData += 4;
     outBuf = messageBuf;
     outRemaining = messageBufLen - 1;
@@ -1543,12 +1520,7 @@
  * This code is Android specific, bionic guarantees that
  * calls to non-reentrant getpwuid() are thread safe.
  */
-#if !defined(__MINGW32__)
-#if (FAKE_LOG_DEVICE == 0)
-#ifndef __BIONIC__
-#warning "This code assumes that getpwuid is thread safe, only true with Bionic!"
-#endif
-#endif
+#ifdef __ANDROID__
       struct passwd* pwd = getpwuid(entry->uid);
       if (pwd && (strlen(pwd->pw_name) <= 5)) {
         snprintf(uid, sizeof(uid), "%5s:", pwd->pw_name);
diff --git a/liblog/pmsg_reader.cpp b/liblog/pmsg_reader.cpp
index ce923f3..64a92b7 100644
--- a/liblog/pmsg_reader.cpp
+++ b/liblog/pmsg_reader.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include "pmsg_reader.h"
+
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -21,62 +23,12 @@
 #include <string.h>
 #include <sys/types.h>
 
-#include <private/android_filesystem_config.h>
+#include <cutils/list.h>
 #include <private/android_logger.h>
 
 #include "logger.h"
 
-static int pmsgAvailable(log_id_t logId);
-static int pmsgVersion(struct android_log_logger* logger,
-                       struct android_log_transport_context* transp);
-static int pmsgRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg);
-static void pmsgClose(struct android_log_logger_list* logger_list,
-                      struct android_log_transport_context* transp);
-static int pmsgClear(struct android_log_logger* logger,
-                     struct android_log_transport_context* transp);
-
-struct android_log_transport_read pmsgLoggerRead = {
-    .name = "pmsg",
-    .available = pmsgAvailable,
-    .version = pmsgVersion,
-    .close = pmsgClose,
-    .read = pmsgRead,
-    .poll = NULL,
-    .clear = pmsgClear,
-    .setSize = NULL,
-    .getSize = NULL,
-    .getReadableSize = NULL,
-    .getPrune = NULL,
-    .setPrune = NULL,
-    .getStats = NULL,
-};
-
-static int pmsgAvailable(log_id_t logId) {
-  if (logId > LOG_ID_SECURITY) {
-    return -EINVAL;
-  }
-  if (access("/dev/pmsg0", W_OK) == 0) {
-    return 0;
-  }
-  return -EBADF;
-}
-
-static int pmsgClear(struct android_log_logger* logger __unused,
-                     struct android_log_transport_context* transp __unused) {
-  return unlink("/sys/fs/pstore/pmsg-ramoops-0");
-}
-
-/*
- * returns the logger version
- */
-static int pmsgVersion(struct android_log_logger* logger __unused,
-                       struct android_log_transport_context* transp __unused) {
-  return 4;
-}
-
-static int pmsgRead(struct android_log_logger_list* logger_list,
-                    struct android_log_transport_context* transp, struct log_msg* log_msg) {
+int PmsgRead(struct logger_list* logger_list, struct log_msg* log_msg) {
   ssize_t ret;
   off_t current, next;
   struct __attribute__((__packed__)) {
@@ -88,7 +40,7 @@
 
   memset(log_msg, 0, sizeof(*log_msg));
 
-  if (atomic_load(&transp->context.fd) <= 0) {
+  if (atomic_load(&logger_list->fd) <= 0) {
     int i, fd = open("/sys/fs/pstore/pmsg-ramoops-0", O_RDONLY | O_CLOEXEC);
 
     if (fd < 0) {
@@ -101,7 +53,7 @@
         return -errno;
       }
     }
-    i = atomic_exchange(&transp->context.fd, fd);
+    i = atomic_exchange(&logger_list->fd, fd);
     if ((i > 0) && (i != fd)) {
       close(i);
     }
@@ -112,7 +64,7 @@
     int fd;
 
     if (preread_count < sizeof(buf)) {
-      fd = atomic_load(&transp->context.fd);
+      fd = atomic_load(&logger_list->fd);
       if (fd <= 0) {
         return -EBADF;
       }
@@ -138,15 +90,15 @@
     }
     preread_count = 0;
 
-    if ((transp->logMask & (1 << buf.l.id)) &&
+    if ((logger_list->log_mask & (1 << buf.l.id)) &&
         ((!logger_list->start.tv_sec && !logger_list->start.tv_nsec) ||
          ((logger_list->start.tv_sec <= buf.l.realtime.tv_sec) &&
           ((logger_list->start.tv_sec != buf.l.realtime.tv_sec) ||
            (logger_list->start.tv_nsec <= buf.l.realtime.tv_nsec)))) &&
         (!logger_list->pid || (logger_list->pid == buf.p.pid))) {
-      char* msg = log_msg->entry_v4.msg;
+      char* msg = log_msg->entry.msg;
       *msg = buf.prio;
-      fd = atomic_load(&transp->context.fd);
+      fd = atomic_load(&logger_list->fd);
       if (fd <= 0) {
         return -EBADF;
       }
@@ -158,19 +110,19 @@
         return -EIO;
       }
 
-      log_msg->entry_v4.len = buf.p.len - sizeof(buf) + sizeof(buf.prio);
-      log_msg->entry_v4.hdr_size = sizeof(log_msg->entry_v4);
-      log_msg->entry_v4.pid = buf.p.pid;
-      log_msg->entry_v4.tid = buf.l.tid;
-      log_msg->entry_v4.sec = buf.l.realtime.tv_sec;
-      log_msg->entry_v4.nsec = buf.l.realtime.tv_nsec;
-      log_msg->entry_v4.lid = buf.l.id;
-      log_msg->entry_v4.uid = buf.p.uid;
+      log_msg->entry.len = buf.p.len - sizeof(buf) + sizeof(buf.prio);
+      log_msg->entry.hdr_size = sizeof(log_msg->entry);
+      log_msg->entry.pid = buf.p.pid;
+      log_msg->entry.tid = buf.l.tid;
+      log_msg->entry.sec = buf.l.realtime.tv_sec;
+      log_msg->entry.nsec = buf.l.realtime.tv_nsec;
+      log_msg->entry.lid = buf.l.id;
+      log_msg->entry.uid = buf.p.uid;
 
-      return ret + sizeof(buf.prio) + log_msg->entry_v4.hdr_size;
+      return ret + sizeof(buf.prio) + log_msg->entry.hdr_size;
     }
 
-    fd = atomic_load(&transp->context.fd);
+    fd = atomic_load(&logger_list->fd);
     if (fd <= 0) {
       return -EBADF;
     }
@@ -178,7 +130,7 @@
     if (current < 0) {
       return -errno;
     }
-    fd = atomic_load(&transp->context.fd);
+    fd = atomic_load(&logger_list->fd);
     if (fd <= 0) {
       return -EBADF;
     }
@@ -192,9 +144,8 @@
   }
 }
 
-static void pmsgClose(struct android_log_logger_list* logger_list __unused,
-                      struct android_log_transport_context* transp) {
-  int fd = atomic_exchange(&transp->context.fd, 0);
+void PmsgClose(struct logger_list* logger_list) {
+  int fd = atomic_exchange(&logger_list->fd, 0);
   if (fd > 0) {
     close(fd);
   }
@@ -211,11 +162,10 @@
 ssize_t __android_log_pmsg_file_read(log_id_t logId, char prio, const char* prefix,
                                      __android_log_pmsg_file_read_fn fn, void* arg) {
   ssize_t ret;
-  struct android_log_logger_list logger_list;
-  struct android_log_transport_context transp;
+  struct logger_list logger_list;
   struct content {
     struct listnode node;
-    struct logger_entry_v4 entry;
+    struct logger_entry entry;
   } * content;
   struct names {
     struct listnode node;
@@ -234,15 +184,14 @@
 
   /* Add just enough clues in logger_list and transp to make API function */
   memset(&logger_list, 0, sizeof(logger_list));
-  memset(&transp, 0, sizeof(transp));
 
   logger_list.mode = ANDROID_LOG_PSTORE | ANDROID_LOG_NONBLOCK | ANDROID_LOG_RDONLY;
-  transp.logMask = (unsigned)-1;
+  logger_list.log_mask = (unsigned)-1;
   if (logId != LOG_ID_ANY) {
-    transp.logMask = (1 << logId);
+    logger_list.log_mask = (1 << logId);
   }
-  transp.logMask &= ~((1 << LOG_ID_KERNEL) | (1 << LOG_ID_EVENTS) | (1 << LOG_ID_SECURITY));
-  if (!transp.logMask) {
+  logger_list.log_mask &= ~((1 << LOG_ID_KERNEL) | (1 << LOG_ID_EVENTS) | (1 << LOG_ID_SECURITY));
+  if (!logger_list.log_mask) {
     return -EINVAL;
   }
 
@@ -267,25 +216,26 @@
   }
 
   /* Read the file content */
-  while (pmsgRead(&logger_list, &transp, &transp.logMsg) > 0) {
+  log_msg log_msg;
+  while (PmsgRead(&logger_list, &log_msg) > 0) {
     const char* cp;
-    size_t hdr_size = transp.logMsg.entry.hdr_size ? transp.logMsg.entry.hdr_size
-                                                   : sizeof(transp.logMsg.entry_v1);
-    char* msg = (char*)&transp.logMsg + hdr_size;
+    size_t hdr_size = log_msg.entry.hdr_size;
+
+    char* msg = (char*)&log_msg + hdr_size;
     const char* split = NULL;
 
-    if ((hdr_size < sizeof(transp.logMsg.entry_v1)) || (hdr_size > sizeof(transp.logMsg.entry))) {
+    if (hdr_size != sizeof(log_msg.entry)) {
       continue;
     }
     /* Check for invalid sequence number */
-    if ((transp.logMsg.entry.nsec % ANDROID_LOG_PMSG_FILE_SEQUENCE) ||
-        ((transp.logMsg.entry.nsec / ANDROID_LOG_PMSG_FILE_SEQUENCE) >=
-         ANDROID_LOG_PMSG_FILE_MAX_SEQUENCE)) {
+    if (log_msg.entry.nsec % ANDROID_LOG_PMSG_FILE_SEQUENCE ||
+        (log_msg.entry.nsec / ANDROID_LOG_PMSG_FILE_SEQUENCE) >=
+            ANDROID_LOG_PMSG_FILE_MAX_SEQUENCE) {
       continue;
     }
 
     /* Determine if it has <dirbase>:<filebase> format for tag */
-    len = transp.logMsg.entry.len - sizeof(prio);
+    len = log_msg.entry.len - sizeof(prio);
     for (cp = msg + sizeof(prio); *cp && isprint(*cp) && !isspace(*cp) && --len; ++cp) {
       if (*cp == ':') {
         if (split) {
@@ -331,8 +281,8 @@
     /* check if there is an existing entry */
     list_for_each(node, &name_list) {
       names = node_to_item(node, struct names, node);
-      if (!strcmp(names->name, msg + sizeof(prio)) && (names->id == transp.logMsg.entry.lid) &&
-          (names->prio == *msg)) {
+      if (!strcmp(names->name, msg + sizeof(prio)) && names->id == log_msg.entry.lid &&
+          names->prio == *msg) {
         break;
       }
     }
@@ -349,7 +299,7 @@
         break;
       }
       strcpy(names->name, msg + sizeof(prio));
-      names->id = static_cast<log_id_t>(transp.logMsg.entry.lid);
+      names->id = static_cast<log_id_t>(log_msg.entry.lid);
       names->prio = *msg;
       list_init(&names->content);
       /*
@@ -402,7 +352,7 @@
     /* Remove any file fragments that match our sequence number */
     list_for_each_safe(node, n, &names->content) {
       content = node_to_item(node, struct content, node);
-      if (transp.logMsg.entry.nsec == content->entry.nsec) {
+      if (log_msg.entry.nsec == content->entry.nsec) {
         list_remove(&content->node);
         free(content);
       }
@@ -410,22 +360,22 @@
 
     /* Add content */
     content = static_cast<struct content*>(
-        calloc(1, sizeof(content->node) + hdr_size + transp.logMsg.entry.len));
+        calloc(1, sizeof(content->node) + hdr_size + log_msg.entry.len));
     if (!content) {
       ret = -ENOMEM;
       break;
     }
-    memcpy(&content->entry, &transp.logMsg.entry, hdr_size + transp.logMsg.entry.len);
+    memcpy(&content->entry, &log_msg.entry, hdr_size + log_msg.entry.len);
 
     /* Insert in sequence number sorted order, to ease reconstruction */
     list_for_each_reverse(node, &names->content) {
-      if ((node_to_item(node, struct content, node))->entry.nsec < transp.logMsg.entry.nsec) {
+      if ((node_to_item(node, struct content, node))->entry.nsec < log_msg.entry.nsec) {
         break;
       }
     }
     list_add_head(node, &content->node);
   }
-  pmsgClose(&logger_list, &transp);
+  PmsgClose(&logger_list);
 
   /* Progress through all the collected files */
   list_for_each_safe(node, n, &name_list) {
diff --git a/adb/daemon/set_verity_enable_state_service.h b/liblog/pmsg_reader.h
similarity index 67%
copy from adb/daemon/set_verity_enable_state_service.h
copy to liblog/pmsg_reader.h
index c0ed98e..b784f9f 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/liblog/pmsg_reader.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,14 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <sys/cdefs.h>
+#include <unistd.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#include "log/log_read.h"
+
+__BEGIN_DECLS
+
+int PmsgRead(struct logger_list* logger_list, struct log_msg* log_msg);
+void PmsgClose(struct logger_list* logger_list);
+
+__END_DECLS
diff --git a/liblog/pmsg_writer.cpp b/liblog/pmsg_writer.cpp
index 54980d9..06e5e04 100644
--- a/liblog/pmsg_writer.cpp
+++ b/liblog/pmsg_writer.cpp
@@ -14,9 +14,7 @@
  * limitations under the License.
  */
 
-/*
- * pmsg write handler
- */
+#include "pmsg_writer.h"
 
 #include <errno.h>
 #include <fcntl.h>
@@ -25,68 +23,37 @@
 #include <sys/types.h>
 #include <time.h>
 
+#include <shared_mutex>
+
 #include <log/log_properties.h>
-#include <private/android_filesystem_config.h>
 #include <private/android_logger.h>
 
-#include "log_portability.h"
 #include "logger.h"
+#include "rwlock.h"
 #include "uio.h"
 
-static int pmsgOpen();
-static void pmsgClose();
-static int pmsgAvailable(log_id_t logId);
-static int pmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
+static int pmsg_fd;
+static RwLock pmsg_fd_lock;
 
-struct android_log_transport_write pmsgLoggerWrite = {
-    .name = "pmsg",
-    .logMask = 0,
-    .context.fd = -1,
-    .available = pmsgAvailable,
-    .open = pmsgOpen,
-    .close = pmsgClose,
-    .write = pmsgWrite,
-};
-
-static int pmsgOpen() {
-  int fd = atomic_load(&pmsgLoggerWrite.context.fd);
-  if (fd < 0) {
-    int i;
-
-    fd = TEMP_FAILURE_RETRY(open("/dev/pmsg0", O_WRONLY | O_CLOEXEC));
-    i = atomic_exchange(&pmsgLoggerWrite.context.fd, fd);
-    if ((i >= 0) && (i != fd)) {
-      close(i);
-    }
+static void PmsgOpen() {
+  auto lock = std::unique_lock{pmsg_fd_lock};
+  if (pmsg_fd > 0) {
+    // Someone raced us and opened the socket already.
+    return;
   }
 
-  return fd;
+  pmsg_fd = TEMP_FAILURE_RETRY(open("/dev/pmsg0", O_WRONLY | O_CLOEXEC));
 }
 
-static void pmsgClose() {
-  int fd = atomic_exchange(&pmsgLoggerWrite.context.fd, -1);
-  if (fd >= 0) {
-    close(fd);
+void PmsgClose() {
+  auto lock = std::unique_lock{pmsg_fd_lock};
+  if (pmsg_fd > 0) {
+    close(pmsg_fd);
   }
+  pmsg_fd = 0;
 }
 
-static int pmsgAvailable(log_id_t logId) {
-  if (logId > LOG_ID_SECURITY) {
-    return -EINVAL;
-  }
-  if ((logId != LOG_ID_SECURITY) && (logId != LOG_ID_EVENTS) && !__android_log_is_debuggable()) {
-    return -EINVAL;
-  }
-  if (atomic_load(&pmsgLoggerWrite.context.fd) < 0) {
-    if (access("/dev/pmsg0", W_OK) == 0) {
-      return 0;
-    }
-    return -EBADF;
-  }
-  return 1;
-}
-
-static int pmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
+int PmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr) {
   static const unsigned headerLength = 2;
   struct iovec newVec[nr + headerLength];
   android_log_header_t header;
@@ -94,17 +61,31 @@
   size_t i, payloadSize;
   ssize_t ret;
 
-  if ((logId == LOG_ID_EVENTS) && !__android_log_is_debuggable()) {
-    if (vec[0].iov_len < 4) {
-      return -EINVAL;
+  if (!__android_log_is_debuggable()) {
+    if (logId != LOG_ID_EVENTS && logId != LOG_ID_SECURITY) {
+      return -1;
     }
 
-    if (SNET_EVENT_LOG_TAG != *static_cast<uint32_t*>(vec[0].iov_base)) {
-      return -EPERM;
+    if (logId == LOG_ID_EVENTS) {
+      if (vec[0].iov_len < 4) {
+        return -EINVAL;
+      }
+
+      if (SNET_EVENT_LOG_TAG != *static_cast<uint32_t*>(vec[0].iov_base)) {
+        return -EPERM;
+      }
     }
   }
 
-  if (atomic_load(&pmsgLoggerWrite.context.fd) < 0) {
+  auto lock = std::shared_lock{pmsg_fd_lock};
+
+  if (pmsg_fd <= 0) {
+    lock.unlock();
+    PmsgOpen();
+    lock.lock();
+  }
+
+  if (pmsg_fd <= 0) {
     return -EBADF;
   }
 
@@ -130,7 +111,7 @@
 
   pmsgHeader.magic = LOGGER_MAGIC;
   pmsgHeader.len = sizeof(pmsgHeader) + sizeof(header);
-  pmsgHeader.uid = __android_log_uid();
+  pmsgHeader.uid = getuid();
   pmsgHeader.pid = getpid();
 
   header.id = logId;
@@ -158,7 +139,7 @@
   }
   pmsgHeader.len += payloadSize;
 
-  ret = TEMP_FAILURE_RETRY(writev(atomic_load(&pmsgLoggerWrite.context.fd), newVec, i));
+  ret = TEMP_FAILURE_RETRY(writev(pmsg_fd, newVec, i));
   if (ret < 0) {
     ret = errno ? -errno : -ENOTCONN;
   }
@@ -193,7 +174,6 @@
 /* Write a buffer as filename references (tag = <basedir>:<basename>) */
 ssize_t __android_log_pmsg_file_write(log_id_t logId, char prio, const char* filename,
                                       const char* buf, size_t len) {
-  bool weOpened;
   size_t length, packet_len;
   const char* tag;
   char *cp, *slash;
@@ -233,7 +213,6 @@
   vec[1].iov_base = (unsigned char*)tag;
   vec[1].iov_len = length;
 
-  weOpened = false;
   for (ts.tv_nsec = 0, length = len; length; ts.tv_nsec += ANDROID_LOG_PMSG_FILE_SEQUENCE) {
     ssize_t ret;
     size_t transfer;
@@ -254,37 +233,15 @@
     vec[2].iov_base = (unsigned char*)buf;
     vec[2].iov_len = transfer;
 
-    if (atomic_load(&pmsgLoggerWrite.context.fd) < 0) {
-      if (!weOpened) { /* Impossible for weOpened = true here */
-        __android_log_lock();
-      }
-      weOpened = atomic_load(&pmsgLoggerWrite.context.fd) < 0;
-      if (!weOpened) {
-        __android_log_unlock();
-      } else if (pmsgOpen() < 0) {
-        __android_log_unlock();
-        free(cp);
-        return -EBADF;
-      }
-    }
-
-    ret = pmsgWrite(logId, &ts, vec, sizeof(vec) / sizeof(vec[0]));
+    ret = PmsgWrite(logId, &ts, vec, sizeof(vec) / sizeof(vec[0]));
 
     if (ret <= 0) {
-      if (weOpened) {
-        pmsgClose();
-        __android_log_unlock();
-      }
       free(cp);
       return ret ? ret : (len - length);
     }
     length -= transfer;
     buf += transfer;
   }
-  if (weOpened) {
-    pmsgClose();
-    __android_log_unlock();
-  }
   free(cp);
   return len;
 }
diff --git a/adb/daemon/set_verity_enable_state_service.h b/liblog/pmsg_writer.h
similarity index 73%
copy from adb/daemon/set_verity_enable_state_service.h
copy to liblog/pmsg_writer.h
index c0ed98e..d5e1a1c 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/liblog/pmsg_writer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,9 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <stddef.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#include <android/log.h>
+
+int PmsgWrite(log_id_t logId, struct timespec* ts, struct iovec* vec, size_t nr);
+void PmsgClose();
diff --git a/liblog/properties.cpp b/liblog/properties.cpp
index 2e0a8c9..f30058a 100644
--- a/liblog/properties.cpp
+++ b/liblog/properties.cpp
@@ -20,13 +20,18 @@
 #include <pthread.h>
 #include <stdlib.h>
 #include <string.h>
-#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
-#include <sys/_system_properties.h>
 #include <unistd.h>
 
+#include <algorithm>
+#include <shared_mutex>
+
 #include <private/android_logger.h>
 
-#include "log_portability.h"
+#include "logger_write.h"
+
+#ifdef __ANDROID__
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
 
 static pthread_mutex_t lock_loggable = PTHREAD_MUTEX_INITIALIZER;
 
@@ -89,14 +94,21 @@
   }
 }
 
-static int __android_log_level(const char* tag, size_t len, int default_prio) {
+static int __android_log_level(const char* tag, size_t len) {
   /* sizeof() is used on this array below */
   static const char log_namespace[] = "persist.log.tag.";
   static const size_t base_offset = 8; /* skip "persist." */
-  /* calculate the size of our key temporary buffer */
-  const size_t taglen = tag ? len : 0;
+
+  auto tag_lock = std::shared_lock{default_tag_lock, std::defer_lock};
+  if (tag == nullptr || len == 0) {
+    tag_lock.lock();
+    auto& tag_string = GetDefaultTag();
+    tag = tag_string.c_str();
+    len = tag_string.size();
+  }
+
   /* sizeof(log_namespace) = strlen(log_namespace) + 1 */
-  char key[sizeof(log_namespace) + taglen];
+  char key[sizeof(log_namespace) + len];
   char* kp;
   size_t i;
   char c = 0;
@@ -146,7 +158,7 @@
     }
   }
 
-  if (taglen) {
+  if (len) {
     int local_change_detected = change_detected;
     if (!not_locked) {
       if (!last_tag || !last_tag[0] || (last_tag[0] != tag[0]) ||
@@ -258,20 +270,30 @@
     case 'F': /* FALLTHRU */ /* Not officially supported */
     case 'A': return ANDROID_LOG_FATAL;
     case BOOLEAN_FALSE: /* FALLTHRU */ /* Not Officially supported */
-    case 'S': return -1; /* ANDROID_LOG_SUPPRESS */
+    case 'S': return ANDROID_LOG_SILENT;
       /* clang-format on */
   }
-  return default_prio;
+  return -1;
 }
 
 int __android_log_is_loggable_len(int prio, const char* tag, size_t len, int default_prio) {
-  int logLevel = __android_log_level(tag, len, default_prio);
-  return logLevel >= 0 && prio >= logLevel;
+  int minimum_log_priority = __android_log_get_minimum_priority();
+  int property_log_level = __android_log_level(tag, len);
+
+  if (property_log_level >= 0 && minimum_log_priority != ANDROID_LOG_DEFAULT) {
+    return prio >= std::min(property_log_level, minimum_log_priority);
+  } else if (property_log_level >= 0) {
+    return prio >= property_log_level;
+  } else if (minimum_log_priority != ANDROID_LOG_DEFAULT) {
+    return prio >= minimum_log_priority;
+  } else {
+    return prio >= default_prio;
+  }
 }
 
 int __android_log_is_loggable(int prio, const char* tag, int default_prio) {
-  int logLevel = __android_log_level(tag, (tag && *tag) ? strlen(tag) : 0, default_prio);
-  return logLevel >= 0 && prio >= logLevel;
+  auto len = tag ? strlen(tag) : 0;
+  return __android_log_is_loggable_len(prio, tag, len, default_prio);
 }
 
 int __android_log_is_debuggable() {
@@ -627,3 +649,23 @@
 
   return property_size;
 }
+
+#else
+
+int __android_log_is_loggable(int prio, const char*, int) {
+  int minimum_priority = __android_log_get_minimum_priority();
+  if (minimum_priority == ANDROID_LOG_DEFAULT) {
+    minimum_priority = ANDROID_LOG_INFO;
+  }
+  return prio >= minimum_priority;
+}
+
+int __android_log_is_loggable_len(int prio, const char*, size_t, int def) {
+  return __android_log_is_loggable(prio, nullptr, def);
+}
+
+int __android_log_is_debuggable() {
+  return 1;
+}
+
+#endif
\ No newline at end of file
diff --git a/liblog/rwlock.h b/liblog/rwlock.h
new file mode 100644
index 0000000..00f1806
--- /dev/null
+++ b/liblog/rwlock.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <pthread.h>
+
+// As of the end of Dec 2019, std::shared_mutex is *not* simply a pthread_rwlock, but rather a
+// combination of std::mutex and std::condition variable, which is obviously less efficient.  This
+// immitates what std::shared_mutex should be doing and is compatible with std::shared_lock and
+// std::unique_lock.
+
+class RwLock {
+ public:
+  RwLock() {}
+  ~RwLock() {}
+
+  void lock() { pthread_rwlock_wrlock(&rwlock_); }
+  void unlock() { pthread_rwlock_unlock(&rwlock_); }
+
+  void lock_shared() { pthread_rwlock_rdlock(&rwlock_); }
+  void unlock_shared() { pthread_rwlock_unlock(&rwlock_); }
+
+ private:
+  pthread_rwlock_t rwlock_ = PTHREAD_RWLOCK_INITIALIZER;
+};
diff --git a/liblog/tests/Android.bp b/liblog/tests/Android.bp
index 394fa93..b4bb77f 100644
--- a/liblog/tests/Android.bp
+++ b/liblog/tests/Android.bp
@@ -54,6 +54,8 @@
     ],
     srcs: [
         "libc_test.cpp",
+        "liblog_default_tag.cpp",
+        "liblog_global_state.cpp",
         "liblog_test.cpp",
         "log_id_test.cpp",
         "log_radio_test.cpp",
@@ -62,6 +64,7 @@
         "log_time_test.cpp",
         "log_wrap_test.cpp",
         "logprint_test.cpp",
+        "rwlock_test.cpp",
     ],
     shared_libs: [
         "libcutils",
@@ -96,3 +99,16 @@
         "vts",
     ],
 }
+
+cc_test_host {
+    name: "liblog-host-test",
+    static_libs: ["liblog"],
+    shared_libs: ["libbase"],
+    srcs: [
+        "liblog_host_test.cpp",
+        "liblog_default_tag.cpp",
+        "liblog_global_state.cpp",
+        "rwlock_test.cpp",
+    ],
+    isolated: true,
+}
diff --git a/liblog/tests/AndroidTest.xml b/liblog/tests/AndroidTest.xml
index c167478..fcb46b1 100644
--- a/liblog/tests/AndroidTest.xml
+++ b/liblog/tests/AndroidTest.xml
@@ -18,6 +18,7 @@
     <option name="config-descriptor:metadata" key="component" value="systems" />
     <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
     <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
     <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
         <option name="cleanup" value="true" />
         <option name="push" value="CtsLiblogTestCases->/data/local/tmp/CtsLiblogTestCases" />
diff --git a/liblog/tests/liblog_benchmark.cpp b/liblog/tests/liblog_benchmark.cpp
index 56892a2..39ac7a5 100644
--- a/liblog/tests/liblog_benchmark.cpp
+++ b/liblog/tests/liblog_benchmark.cpp
@@ -913,7 +913,7 @@
 }
 BENCHMARK(BM_lookupEventTagNum);
 
-// Must be functionally identical to liblog internal __send_log_msg.
+// Must be functionally identical to liblog internal SendLogdControlMessage()
 static void send_to_control(char* buf, size_t len) {
   int sock =
       socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM | SOCK_CLOEXEC);
diff --git a/liblog/tests/liblog_default_tag.cpp b/liblog/tests/liblog_default_tag.cpp
new file mode 100644
index 0000000..31b7467
--- /dev/null
+++ b/liblog/tests/liblog_default_tag.cpp
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// LOG_TAG must be unset for android-base's logging to use a default tag.
+#undef LOG_TAG
+
+#include <stdlib.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/scopeguard.h>
+#include <android/log.h>
+
+#include <gtest/gtest.h>
+
+#ifndef __ANDROID__
+static const char* getprogname() {
+  return program_invocation_short_name;
+}
+#endif
+
+TEST(liblog_default_tag, no_default_tag_libbase_write_first) {
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = "";
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+
+  expected_tag = getprogname();
+  LOG(WARNING) << "message";
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_WARN, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_default_tag, no_default_tag_liblog_write_first) {
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = "";
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+
+  expected_tag = getprogname();
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_WARN, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  LOG(WARNING) << "message";
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_default_tag, libbase_sets_default_tag) {
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = "libbase_test_tag";
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+  SetDefaultTag(expected_tag);
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_WARN, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  LOG(WARNING) << "message";
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_default_tag, liblog_sets_default_tag) {
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = "liblog_test_tag";
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+  __android_log_set_default_tag(expected_tag.c_str());
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_WARN, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  LOG(WARNING) << "message";
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_default_tag, default_tag_plus_log_severity) {
+#ifdef __ANDROID__
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = "liblog_test_tag";
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+  __android_log_set_default_tag(expected_tag.c_str());
+
+  auto log_tag_property = "log.tag." + expected_tag;
+  SetProperty(log_tag_property, "V");
+  auto reset_tag_property_guard = make_scope_guard([=] { SetProperty(log_tag_property, ""); });
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_VERBOSE, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  LOG(VERBOSE) << "message";
+  EXPECT_TRUE(message_seen);
+#else
+  GTEST_SKIP() << "No log tag properties on host";
+#endif
+}
+
+TEST(liblog_default_tag, generated_default_tag_plus_log_severity) {
+#ifdef __ANDROID__
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_tag = getprogname();
+  SetLogger([&](LogId, LogSeverity, const char* tag, const char*, unsigned int, const char*) {
+    message_seen = true;
+    EXPECT_EQ(expected_tag, tag);
+  });
+
+  // Even without any calls to SetDefaultTag(), the first message that attempts to log, will
+  // generate a default tag from getprogname() and check log.tag.<default tag> for loggability. This
+  // case checks that we can log a Verbose message when log.tag.<getprogname()> is set to 'V'.
+  auto log_tag_property = "log.tag." + expected_tag;
+  SetProperty(log_tag_property, "V");
+  auto reset_tag_property_guard = make_scope_guard([=] { SetProperty(log_tag_property, ""); });
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_VERBOSE, nullptr, "message");
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  LOG(VERBOSE) << "message";
+  EXPECT_TRUE(message_seen);
+#else
+  GTEST_SKIP() << "No log tag properties on host";
+#endif
+}
\ No newline at end of file
diff --git a/liblog/tests/liblog_global_state.cpp b/liblog/tests/liblog_global_state.cpp
new file mode 100644
index 0000000..9a181ef
--- /dev/null
+++ b/liblog/tests/liblog_global_state.cpp
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "global_state_test_tag"
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android/log.h>
+
+#include <gtest/gtest.h>
+
+TEST(liblog_global_state, libbase_logs_with_libbase_SetLogger) {
+  using namespace android::base;
+  bool message_seen = false;
+  LogSeverity expected_severity = WARNING;
+  std::string expected_file = Basename(__FILE__);
+  unsigned int expected_line;
+  std::string expected_message = "libbase test message";
+
+  auto LoggerFunction = [&](LogId log_id, LogSeverity severity, const char* tag, const char* file,
+                            unsigned int line, const char* message) {
+    message_seen = true;
+    EXPECT_EQ(DEFAULT, log_id);
+    EXPECT_EQ(expected_severity, severity);
+    EXPECT_STREQ(LOG_TAG, tag);
+    EXPECT_EQ(expected_file, file);
+    EXPECT_EQ(expected_line, line);
+    EXPECT_EQ(expected_message, message);
+  };
+
+  SetLogger(LoggerFunction);
+
+  expected_line = __LINE__ + 1;
+  LOG(expected_severity) << expected_message;
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_global_state, libbase_logs_with_liblog_set_logger) {
+  using namespace android::base;
+  // These must be static since they're used by the liblog logger function, which only accepts
+  // lambdas without captures.  The items used by the libbase logger are explicitly not static, to
+  // ensure that lambdas with captures do work there.
+  static bool message_seen = false;
+  static std::string expected_file = Basename(__FILE__);
+  static unsigned int expected_line;
+  static std::string expected_message = "libbase test message";
+
+  auto liblog_logger_function = [](const struct __android_logger_data* logger_data,
+                                   const char* message) {
+    message_seen = true;
+    EXPECT_EQ(sizeof(__android_logger_data), logger_data->struct_size);
+    EXPECT_EQ(LOG_ID_DEFAULT, logger_data->buffer_id);
+    EXPECT_EQ(ANDROID_LOG_WARN, logger_data->priority);
+    EXPECT_STREQ(LOG_TAG, logger_data->tag);
+    EXPECT_EQ(expected_file, logger_data->file);
+    EXPECT_EQ(expected_line, logger_data->line);
+    EXPECT_EQ(expected_message, message);
+  };
+
+  __android_log_set_logger(liblog_logger_function);
+
+  expected_line = __LINE__ + 1;
+  LOG(WARNING) << expected_message;
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_global_state, liblog_logs_with_libbase_SetLogger) {
+  using namespace android::base;
+  bool message_seen = false;
+  std::string expected_message = "libbase test message";
+
+  auto LoggerFunction = [&](LogId log_id, LogSeverity severity, const char* tag, const char* file,
+                            unsigned int line, const char* message) {
+    message_seen = true;
+    EXPECT_EQ(MAIN, log_id);
+    EXPECT_EQ(WARNING, severity);
+    EXPECT_STREQ(LOG_TAG, tag);
+    EXPECT_EQ(nullptr, file);
+    EXPECT_EQ(0U, line);
+    EXPECT_EQ(expected_message, message);
+  };
+
+  SetLogger(LoggerFunction);
+
+  __android_log_buf_write(LOG_ID_MAIN, ANDROID_LOG_WARN, LOG_TAG, expected_message.c_str());
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+}
+
+TEST(liblog_global_state, liblog_logs_with_liblog_set_logger) {
+  using namespace android::base;
+  // These must be static since they're used by the liblog logger function, which only accepts
+  // lambdas without captures.  The items used by the libbase logger are explicitly not static, to
+  // ensure that lambdas with captures do work there.
+  static bool message_seen = false;
+  static int expected_buffer_id = LOG_ID_MAIN;
+  static int expected_priority = ANDROID_LOG_WARN;
+  static std::string expected_message = "libbase test message";
+
+  auto liblog_logger_function = [](const struct __android_logger_data* logger_data,
+                                   const char* message) {
+    message_seen = true;
+    EXPECT_EQ(sizeof(__android_logger_data), logger_data->struct_size);
+    EXPECT_EQ(expected_buffer_id, logger_data->buffer_id);
+    EXPECT_EQ(expected_priority, logger_data->priority);
+    EXPECT_STREQ(LOG_TAG, logger_data->tag);
+    EXPECT_STREQ(nullptr, logger_data->file);
+    EXPECT_EQ(0U, logger_data->line);
+    EXPECT_EQ(expected_message, message);
+  };
+
+  __android_log_set_logger(liblog_logger_function);
+
+  __android_log_buf_write(expected_buffer_id, expected_priority, LOG_TAG, expected_message.c_str());
+  EXPECT_TRUE(message_seen);
+}
+
+TEST(liblog_global_state, SetAborter_with_liblog) {
+  using namespace android::base;
+
+  std::string expected_message = "libbase test message";
+  static bool message_seen = false;
+  auto aborter_function = [&](const char* message) {
+    message_seen = true;
+    EXPECT_EQ(expected_message, message);
+  };
+
+  SetAborter(aborter_function);
+  LOG(FATAL) << expected_message;
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+
+  static std::string expected_message_static = "libbase test message";
+  auto liblog_aborter_function = [](const char* message) {
+    message_seen = true;
+    EXPECT_EQ(expected_message_static, message);
+  };
+  __android_log_set_aborter(liblog_aborter_function);
+  LOG(FATAL) << expected_message_static;
+  EXPECT_TRUE(message_seen);
+  message_seen = false;
+}
+
+TEST(liblog_global_state, is_loggable_both_default) {
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+}
+
+TEST(liblog_global_state, is_loggable_minimum_log_priority_only) {
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  EXPECT_EQ(ANDROID_LOG_DEFAULT, __android_log_set_minimum_priority(ANDROID_LOG_DEBUG));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  EXPECT_EQ(ANDROID_LOG_DEBUG, __android_log_set_minimum_priority(ANDROID_LOG_WARN));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  EXPECT_EQ(android::base::WARNING, android::base::SetMinimumLogSeverity(android::base::DEBUG));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  EXPECT_EQ(android::base::DEBUG, android::base::SetMinimumLogSeverity(android::base::WARNING));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+}
+
+TEST(liblog_global_state, is_loggable_tag_log_priority_only) {
+#ifdef __ANDROID__
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  auto log_tag_property = std::string("log.tag.") + LOG_TAG;
+  android::base::SetProperty(log_tag_property, "d");
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  android::base::SetProperty(log_tag_property, "w");
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  android::base::SetProperty(log_tag_property, "");
+#else
+  GTEST_SKIP() << "No log tag properties on host";
+#endif
+}
+
+TEST(liblog_global_state, is_loggable_both_set) {
+#ifdef __ANDROID__
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  // When both a tag and a minimum priority are set, we use the lower value of the two.
+
+  // tag = warning, minimum_priority = debug, expect 'debug'
+  auto log_tag_property = std::string("log.tag.") + LOG_TAG;
+  android::base::SetProperty(log_tag_property, "w");
+  EXPECT_EQ(ANDROID_LOG_DEFAULT, __android_log_set_minimum_priority(ANDROID_LOG_DEBUG));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  // tag = warning, minimum_priority = warning, expect 'warning'
+  EXPECT_EQ(ANDROID_LOG_DEBUG, __android_log_set_minimum_priority(ANDROID_LOG_WARN));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(0, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  // tag = debug, minimum_priority = warning, expect 'debug'
+  android::base::SetProperty(log_tag_property, "d");
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  // tag = debug, minimum_priority = debug, expect 'debug'
+  EXPECT_EQ(ANDROID_LOG_WARN, __android_log_set_minimum_priority(ANDROID_LOG_DEBUG));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_INFO, LOG_TAG, ANDROID_LOG_INFO));
+  EXPECT_EQ(1, __android_log_is_loggable(ANDROID_LOG_WARN, LOG_TAG, ANDROID_LOG_INFO));
+
+  android::base::SetProperty(log_tag_property, "");
+#else
+  GTEST_SKIP() << "No log tag properties on host";
+#endif
+}
diff --git a/liblog/tests/liblog_host_test.cpp b/liblog/tests/liblog_host_test.cpp
new file mode 100644
index 0000000..ec186d4
--- /dev/null
+++ b/liblog/tests/liblog_host_test.cpp
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <log/log.h>
+#include <private/android_logger.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <regex>
+#include <string>
+
+#include <android-base/logging.h>
+#include <android-base/macros.h>
+#include <android-base/stringprintf.h>
+#include <android-base/test_utils.h>
+#include <gtest/gtest.h>
+
+using android::base::InitLogging;
+using android::base::StderrLogger;
+using android::base::StringPrintf;
+
+static std::string MakeLogPattern(int priority, const char* tag, const char* message) {
+  static const char log_characters[] = "XXVDIWEF";
+  static_assert(arraysize(log_characters) - 1 == ANDROID_LOG_SILENT,
+                "Mismatch in size of log_characters and values in android_LogPriority");
+  priority = priority > ANDROID_LOG_SILENT ? ANDROID_LOG_FATAL : priority;
+  char log_char = log_characters[priority];
+
+  return StringPrintf("%s %c \\d+-\\d+ \\d+:\\d+:\\d+ \\s*\\d+ \\s*\\d+ %s", tag, log_char,
+                      message);
+}
+
+static void CheckMessage(bool expected, const std::string& output, int priority, const char* tag,
+                         const char* message) {
+  std::regex message_regex(MakeLogPattern(priority, tag, message));
+  EXPECT_EQ(expected, std::regex_search(output, message_regex)) << message;
+}
+
+static void GenerateLogContent() {
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_VERBOSE, "tag", "verbose main");
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_INFO, "tag", "info main");
+  __android_log_buf_print(LOG_ID_MAIN, ANDROID_LOG_ERROR, "tag", "error main");
+
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_VERBOSE, "tag", "verbose radio");
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_INFO, "tag", "info radio");
+  __android_log_buf_print(LOG_ID_RADIO, ANDROID_LOG_ERROR, "tag", "error radio");
+
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_VERBOSE, "tag", "verbose system");
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_INFO, "tag", "info system");
+  __android_log_buf_print(LOG_ID_SYSTEM, ANDROID_LOG_ERROR, "tag", "error system");
+
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_VERBOSE, "tag", "verbose crash");
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_INFO, "tag", "info crash");
+  __android_log_buf_print(LOG_ID_CRASH, ANDROID_LOG_ERROR, "tag", "error crash");
+}
+
+std::string GetPidString() {
+  int pid = getpid();
+  return StringPrintf("%5d", pid);
+}
+
+TEST(liblog, default_write) {
+  CapturedStderr captured_stderr;
+  InitLogging(nullptr, StderrLogger);
+
+  GenerateLogContent();
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose main");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info main");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error main");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose radio");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info radio");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error radio");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose system");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info system");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error system");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose crash");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info crash");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error crash");
+}
+
+TEST(liblog, verbose_write) {
+  setenv("ANDROID_LOG_TAGS", "*:v", true);
+  CapturedStderr captured_stderr;
+  InitLogging(nullptr, StderrLogger);
+
+  GenerateLogContent();
+
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose main");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info main");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error main");
+
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose radio");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info radio");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error radio");
+
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose system");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info system");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error system");
+
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose crash");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info crash");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error crash");
+}
+
+TEST(liblog, error_write) {
+  setenv("ANDROID_LOG_TAGS", "*:e", true);
+  CapturedStderr captured_stderr;
+  InitLogging(nullptr, StderrLogger);
+
+  GenerateLogContent();
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose main");
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info main");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error main");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose radio");
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info radio");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error radio");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose system");
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info system");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error system");
+
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_VERBOSE, "tag", "verbose crash");
+  CheckMessage(false, captured_stderr.str(), ANDROID_LOG_INFO, "tag", "info crash");
+  CheckMessage(true, captured_stderr.str(), ANDROID_LOG_ERROR, "tag", "error crash");
+}
+
+TEST(liblog, kernel_no_write) {
+  CapturedStderr captured_stderr;
+  InitLogging(nullptr, StderrLogger);
+  __android_log_buf_print(LOG_ID_KERNEL, ANDROID_LOG_ERROR, "tag", "kernel error");
+  EXPECT_EQ("", captured_stderr.str());
+}
+
+TEST(liblog, binary_no_write) {
+  CapturedStderr captured_stderr;
+  InitLogging(nullptr, StderrLogger);
+  __android_log_buf_print(LOG_ID_EVENTS, ANDROID_LOG_ERROR, "tag", "error events");
+  __android_log_buf_print(LOG_ID_STATS, ANDROID_LOG_ERROR, "tag", "error stats");
+  __android_log_buf_print(LOG_ID_SECURITY, ANDROID_LOG_ERROR, "tag", "error security");
+
+  __android_log_bswrite(0x12, "events");
+  __android_log_stats_bwrite(0x34, "stats", strlen("stats"));
+  __android_log_security_bswrite(0x56, "security");
+
+  EXPECT_EQ("", captured_stderr.str());
+}
diff --git a/liblog/tests/liblog_test.cpp b/liblog/tests/liblog_test.cpp
index 94c4fbb..75a26bf 100644
--- a/liblog/tests/liblog_test.cpp
+++ b/liblog/tests/liblog_test.cpp
@@ -385,7 +385,7 @@
         fprintf(stderr, "Expect \"Binary log entry conversion failed\"\n");
       }
       int processBinaryLogBuffer = android_log_processBinaryLogBuffer(
-          &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
+          &log_msg.entry, &entry, nullptr, msgBuf, sizeof(msgBuf));
       EXPECT_EQ((length == total) ? 0 : -1, processBinaryLogBuffer);
       if ((processBinaryLogBuffer == 0) || entry.message) {
         size_t line_overhead = 20;
@@ -469,8 +469,7 @@
     AndroidLogFormat* logformat = android_log_format_new();
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
-    int processLogBuffer =
-        android_log_processLogBuffer(&log_msg.entry_v1, &entry);
+    int processLogBuffer = android_log_processLogBuffer(&log_msg.entry, &entry);
     EXPECT_EQ(0, processLogBuffer);
     if (processLogBuffer == 0) {
       size_t line_overhead = 11;
@@ -1013,8 +1012,7 @@
     AndroidLogFormat* logformat = android_log_format_new();
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
-    int processLogBuffer =
-        android_log_processLogBuffer(&log_msg.entry_v1, &entry);
+    int processLogBuffer = android_log_processLogBuffer(&log_msg.entry, &entry);
     EXPECT_EQ(0, processLogBuffer);
     if (processLogBuffer == 0) {
       fflush(stderr);
@@ -1076,7 +1074,6 @@
 
     // Once we've found our expected entry, break.
     if (len == LOGGER_ENTRY_MAX_PAYLOAD - sizeof(big_payload_tag)) {
-      EXPECT_EQ(ret, len + static_cast<ssize_t>(sizeof(big_payload_tag)));
       *found = true;
     }
   };
@@ -1261,14 +1258,10 @@
     int level;
     char type;
   } levels[] = {
-    { ANDROID_LOG_VERBOSE, 'v' },
-    { ANDROID_LOG_DEBUG, 'd' },
-    { ANDROID_LOG_INFO, 'i' },
-    { ANDROID_LOG_WARN, 'w' },
-    { ANDROID_LOG_ERROR, 'e' },
-    { ANDROID_LOG_FATAL, 'a' },
-    { -1, 's' },
-    { -2, 'g' },  // Illegal value, resort to default
+      {ANDROID_LOG_VERBOSE, 'v'}, {ANDROID_LOG_DEBUG, 'd'},
+      {ANDROID_LOG_INFO, 'i'},    {ANDROID_LOG_WARN, 'w'},
+      {ANDROID_LOG_ERROR, 'e'},   {ANDROID_LOG_FATAL, 'a'},
+      {ANDROID_LOG_SILENT, 's'},  {-2, 'g'},  // Illegal value, resort to default
   };
 
   // Set up initial test condition
@@ -2507,8 +2500,8 @@
     EXPECT_TRUE(NULL != logformat);
     AndroidLogEntry entry;
     char msgBuf[1024];
-    int processBinaryLogBuffer = android_log_processBinaryLogBuffer(
-        &log_msg.entry_v1, &entry, NULL, msgBuf, sizeof(msgBuf));
+    int processBinaryLogBuffer =
+        android_log_processBinaryLogBuffer(&log_msg.entry, &entry, nullptr, msgBuf, sizeof(msgBuf));
     EXPECT_EQ(0, processBinaryLogBuffer);
     if (processBinaryLogBuffer == 0) {
       int line_overhead = 20;
diff --git a/liblog/tests/rwlock_test.cpp b/liblog/tests/rwlock_test.cpp
new file mode 100644
index 0000000..617d5c4
--- /dev/null
+++ b/liblog/tests/rwlock_test.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../rwlock.h"
+
+#include <chrono>
+#include <shared_mutex>
+#include <thread>
+
+#include <gtest/gtest.h>
+
+using namespace std::literals;
+
+TEST(rwlock, reader_then_reader_lock) {
+  RwLock lock;
+
+  bool thread_ran = false;
+  auto read_guard = std::shared_lock{lock};
+
+  auto reader_thread = std::thread([&] {
+    auto read_guard = std::shared_lock{lock};
+    thread_ran = true;
+  });
+
+  auto end_time = std::chrono::steady_clock::now() + 1s;
+
+  while (std::chrono::steady_clock::now() < end_time) {
+    if (thread_ran) {
+      break;
+    }
+  }
+
+  EXPECT_EQ(true, thread_ran);
+
+  // Unlock the lock in case something went wrong, to ensure that we can still join() the thread.
+  read_guard.unlock();
+  reader_thread.join();
+}
+
+template <template <typename> typename L1, template <typename> typename L2>
+void TestBlockingLocks() {
+  RwLock lock;
+
+  bool thread_ran = false;
+  auto read_guard = L1{lock};
+
+  auto reader_thread = std::thread([&] {
+    auto read_guard = L2{lock};
+    thread_ran = true;
+  });
+
+  auto end_time = std::chrono::steady_clock::now() + 1s;
+
+  while (std::chrono::steady_clock::now() < end_time) {
+    if (thread_ran) {
+      break;
+    }
+  }
+
+  EXPECT_EQ(false, thread_ran);
+
+  read_guard.unlock();
+  reader_thread.join();
+
+  EXPECT_EQ(true, thread_ran);
+}
+
+TEST(rwlock, reader_then_writer_lock) {
+  TestBlockingLocks<std::shared_lock, std::unique_lock>();
+}
+
+TEST(rwlock, writer_then_reader_lock) {
+  TestBlockingLocks<std::unique_lock, std::shared_lock>();
+}
+
+TEST(rwlock, writer_then_writer_lock) {
+  TestBlockingLocks<std::unique_lock, std::unique_lock>();
+}
diff --git a/libmeminfo/.clang-format b/libmeminfo/.clang-format
deleted file mode 120000
index 1af4f51..0000000
--- a/libmeminfo/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-4
\ No newline at end of file
diff --git a/libmeminfo/Android.bp b/libmeminfo/Android.bp
deleted file mode 100644
index 8dcc77b..0000000
--- a/libmeminfo/Android.bp
+++ /dev/null
@@ -1,85 +0,0 @@
-//
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-cc_defaults {
-    name: "libmeminfo_defaults",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libprocinfo",
-    ],
-    target: {
-        darwin: {
-            enabled: false,
-        },
-
-    },
-}
-
-cc_library {
-    name: "libmeminfo",
-    host_supported: true,
-    defaults: ["libmeminfo_defaults"],
-    export_include_dirs: ["include"],
-    export_shared_lib_headers: ["libbase"],
-    srcs: [
-        "pageacct.cpp",
-        "procmeminfo.cpp",
-        "sysmeminfo.cpp",
-    ],
-}
-
-cc_test {
-    name: "libmeminfo_test",
-    defaults: ["libmeminfo_defaults"],
-
-    static_libs: [
-        "libmeminfo",
-        "libbase",
-        "liblog",
-    ],
-
-    srcs: [
-        "libmeminfo_test.cpp"
-    ],
-
-    data: [
-        "testdata1/*",
-        "testdata2/*"
-    ],
-}
-
-cc_benchmark {
-    name: "libmeminfo_benchmark",
-    srcs: [
-        "libmeminfo_benchmark.cpp",
-    ],
-    static_libs : [
-        "libbase",
-        "liblog",
-        "libmeminfo",
-        "libprocinfo",
-    ],
-
-    data: [
-        "testdata1/*",
-    ],
-}
diff --git a/libmeminfo/OWNERS b/libmeminfo/OWNERS
deleted file mode 100644
index 26e71fe..0000000
--- a/libmeminfo/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-sspatil@google.com
diff --git a/libmeminfo/include/meminfo/meminfo.h b/libmeminfo/include/meminfo/meminfo.h
deleted file mode 100644
index 2fc7867..0000000
--- a/libmeminfo/include/meminfo/meminfo.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-namespace android {
-namespace meminfo {
-
-struct MemUsage {
-    uint64_t vss;
-    uint64_t rss;
-    uint64_t pss;
-    uint64_t uss;
-
-    uint64_t swap;
-    uint64_t swap_pss;
-
-    uint64_t private_clean;
-    uint64_t private_dirty;
-    uint64_t shared_clean;
-    uint64_t shared_dirty;
-
-    MemUsage()
-        : vss(0),
-          rss(0),
-          pss(0),
-          uss(0),
-          swap(0),
-          swap_pss(0),
-          private_clean(0),
-          private_dirty(0),
-          shared_clean(0),
-          shared_dirty(0) {}
-
-    ~MemUsage() = default;
-
-    void clear() {
-        vss = rss = pss = uss = swap = swap_pss = 0;
-        private_clean = private_dirty = shared_clean = shared_dirty = 0;
-    }
-};
-
-struct Vma {
-    uint64_t start;
-    uint64_t end;
-    uint64_t offset;
-    uint16_t flags;
-    std::string name;
-
-    Vma() : start(0), end(0), offset(0), flags(0), name("") {}
-    Vma(uint64_t s, uint64_t e, uint64_t off, uint16_t f, const char* n)
-        : start(s), end(e), offset(off), flags(f), name(n) {}
-    ~Vma() = default;
-
-    void clear() { memset(&usage, 0, sizeof(usage)); }
-
-    // Memory usage of this mapping.
-    MemUsage usage;
-};
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/pageacct.h b/libmeminfo/include/meminfo/pageacct.h
deleted file mode 100644
index 8483d84..0000000
--- a/libmeminfo/include/meminfo/pageacct.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-#include <android-base/unique_fd.h>
-
-namespace android {
-namespace meminfo {
-
-class PageAcct final {
-    // Class for per-page accounting by using kernel provided interfaces like
-    // kpagecount, kpageflags etc.
-  public:
-    static bool KernelHasPageIdle() {
-        return (access("/sys/kernel/mm/page_idle/bitmap", R_OK | W_OK) == 0);
-    }
-
-    bool InitPageAcct(bool pageidle_enable = false);
-    bool PageFlags(uint64_t pfn, uint64_t* flags);
-    bool PageMapCount(uint64_t pfn, uint64_t* mapcount);
-
-    int IsPageIdle(uint64_t pfn);
-
-    // The only way to create PageAcct object
-    static PageAcct& Instance() {
-        static PageAcct instance;
-        return instance;
-    }
-
-    ~PageAcct() = default;
-
-  private:
-    PageAcct() : kpagecount_fd_(-1), kpageflags_fd_(-1), pageidle_fd_(-1) {}
-    int MarkPageIdle(uint64_t pfn) const;
-    int GetPageIdle(uint64_t pfn) const;
-
-    // Non-copyable & Non-movable
-    PageAcct(const PageAcct&) = delete;
-    PageAcct& operator=(const PageAcct&) = delete;
-    PageAcct& operator=(PageAcct&&) = delete;
-    PageAcct(PageAcct&&) = delete;
-
-    ::android::base::unique_fd kpagecount_fd_;
-    ::android::base::unique_fd kpageflags_fd_;
-    ::android::base::unique_fd pageidle_fd_;
-};
-
-// Returns if the page present bit is set in the value
-// passed in.
-bool page_present(uint64_t pagemap_val);
-
-// Returns if the page swapped bit is set in the value
-// passed in.
-bool page_swapped(uint64_t pagemap_val);
-
-// Returns the page frame number (physical page) from
-// pagemap value
-uint64_t page_pfn(uint64_t pagemap_val);
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/procmeminfo.h b/libmeminfo/include/meminfo/procmeminfo.h
deleted file mode 100644
index 8c1280f..0000000
--- a/libmeminfo/include/meminfo/procmeminfo.h
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-
-#include <string>
-#include <vector>
-
-#include "meminfo.h"
-
-namespace android {
-namespace meminfo {
-
-using VmaCallback = std::function<void(const Vma&)>;
-
-class ProcMemInfo final {
-    // Per-process memory accounting
-  public:
-    // Reset the working set accounting of the process via /proc/<pid>/clear_refs
-    static bool ResetWorkingSet(pid_t pid);
-
-    ProcMemInfo(pid_t pid, bool get_wss = false, uint64_t pgflags = 0, uint64_t pgflags_mask = 0);
-
-    const std::vector<Vma>& Maps();
-    const MemUsage& Usage();
-    const MemUsage& Wss();
-
-    // Same as Maps() except, only valid for reading working set using CONFIG_IDLE_PAGE_TRACKING
-    // support in kernel. If the kernel support doesn't exist, the function will return an empty
-    // vector.
-    const std::vector<Vma>& MapsWithPageIdle();
-
-    // Same as Maps() except, do not read the usage stats for each map.
-    const std::vector<Vma>& MapsWithoutUsageStats();
-
-    // If MapsWithoutUsageStats was called, this function will fill in
-    // usage stats for this single vma.
-    bool FillInVmaStats(Vma& vma);
-
-    // Collect all 'vma' or 'maps' from /proc/<pid>/smaps and store them in 'maps_'. Returns a
-    // constant reference to the vma vector after the collection is done.
-    //
-    // Each 'struct Vma' is *fully* populated by this method (unlike SmapsOrRollup).
-    const std::vector<Vma>& Smaps(const std::string& path = "");
-
-    // This method reads /proc/<pid>/smaps and calls the callback() for each
-    // vma or map that it finds. The map is converted to 'struct Vma' object which is then
-    // passed to the callback.
-    // Returns 'false' if the file is malformed.
-    bool ForEachVma(const VmaCallback& callback);
-
-    // Used to parse either of /proc/<pid>/{smaps, smaps_rollup} and record the process's
-    // Pss and Private memory usage in 'stats'.  In particular, the method only populates the fields
-    // of the MemUsage structure that are intended to be used by Android's periodic Pss collection.
-    //
-    // The method populates the following statistics in order to be fast an efficient.
-    //   Pss
-    //   Rss
-    //   Uss
-    //   private_clean
-    //   private_dirty
-    //   SwapPss
-    // All other fields of MemUsage are zeroed.
-    bool SmapsOrRollup(MemUsage* stats) const;
-
-    // Used to parse either of /proc/<pid>/{smaps, smaps_rollup} and record the process's
-    // Pss.
-    // Returns 'true' on success and the value of Pss in the out parameter.
-    bool SmapsOrRollupPss(uint64_t* pss) const;
-
-    const std::vector<uint16_t>& SwapOffsets();
-
-    // Reads /proc/<pid>/pagemap for this process for each page within
-    // the 'vma' and stores that in 'pagemap'. It is assumed that the 'vma'
-    // is obtained by calling Maps() or 'ForEachVma' for the same object. No special checks
-    // are made to see if 'vma' is *valid*.
-    // Returns false if anything goes wrong, 'true' otherwise.
-    bool PageMap(const Vma& vma, std::vector<uint64_t>* pagemap);
-
-    ~ProcMemInfo() = default;
-
-  private:
-    bool ReadMaps(bool get_wss, bool use_pageidle = false, bool get_usage_stats = true);
-    bool ReadVmaStats(int pagemap_fd, Vma& vma, bool get_wss, bool use_pageidle);
-
-    pid_t pid_;
-    bool get_wss_;
-    uint64_t pgflags_;
-    uint64_t pgflags_mask_;
-
-    std::vector<Vma> maps_;
-
-    MemUsage usage_;
-    std::vector<uint16_t> swap_offsets_;
-};
-
-// Makes callback for each 'vma' or 'map' found in file provided. The file is expected to be in the
-// same format as /proc/<pid>/smaps. Returns 'false' if the file is malformed.
-bool ForEachVmaFromFile(const std::string& path, const VmaCallback& callback);
-
-// Returns if the kernel supports /proc/<pid>/smaps_rollup. Assumes that the
-// calling process has access to the /proc/<pid>/smaps_rollup.
-// Returns 'false' if the calling process has no permission to read the file if it exists
-// of if the file doesn't exist.
-bool IsSmapsRollupSupported(pid_t pid);
-
-// Same as ProcMemInfo::SmapsOrRollup but reads the statistics directly
-// from a file. The file MUST be in the same format as /proc/<pid>/smaps
-// or /proc/<pid>/smaps_rollup
-bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats);
-
-// Same as ProcMemInfo::SmapsOrRollupPss but reads the statistics directly
-// from a file and returns total Pss in kB. The file MUST be in the same format
-// as /proc/<pid>/smaps or /proc/<pid>/smaps_rollup
-bool SmapsOrRollupPssFromFile(const std::string& path, uint64_t* pss);
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/include/meminfo/sysmeminfo.h b/libmeminfo/include/meminfo/sysmeminfo.h
deleted file mode 100644
index 8388920..0000000
--- a/libmeminfo/include/meminfo/sysmeminfo.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-
-#include <functional>
-#include <map>
-#include <string>
-#include <vector>
-
-namespace android {
-namespace meminfo {
-
-class SysMemInfo final {
-    // System or Global memory accounting
-  public:
-    static constexpr const char* kMemTotal = "MemTotal:";
-    static constexpr const char* kMemFree = "MemFree:";
-    static constexpr const char* kMemBuffers = "Buffers:";
-    static constexpr const char* kMemCached = "Cached:";
-    static constexpr const char* kMemShmem = "Shmem:";
-    static constexpr const char* kMemSlab = "Slab:";
-    static constexpr const char* kMemSReclaim = "SReclaimable:";
-    static constexpr const char* kMemSUnreclaim = "SUnreclaim:";
-    static constexpr const char* kMemSwapTotal = "SwapTotal:";
-    static constexpr const char* kMemSwapFree = "SwapFree:";
-    static constexpr const char* kMemMapped = "Mapped:";
-    static constexpr const char* kMemVmallocUsed = "VmallocUsed:";
-    static constexpr const char* kMemPageTables = "PageTables:";
-    static constexpr const char* kMemKernelStack = "KernelStack:";
-
-    static const std::vector<std::string> kDefaultSysMemInfoTags;
-
-    SysMemInfo() = default;
-
-    // Parse /proc/meminfo and read values that are needed
-    bool ReadMemInfo(const std::string& path = "/proc/meminfo");
-    bool ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
-                     const std::string& path = "/proc/meminfo");
-    bool ReadMemInfo(std::vector<uint64_t>* out, const std::string& path = "/proc/meminfo");
-
-    // Parse /proc/vmallocinfo and return total physical memory mapped
-    // in vmalloc area by the kernel.
-    // Note that this deliberately ignores binder buffers. They are _always_
-    // mapped in a process and are counted for in each process.
-    uint64_t ReadVmallocInfo();
-
-    // getters
-    uint64_t mem_total_kb() { return mem_in_kb_[kMemTotal]; }
-    uint64_t mem_free_kb() { return mem_in_kb_[kMemFree]; }
-    uint64_t mem_buffers_kb() { return mem_in_kb_[kMemBuffers]; }
-    uint64_t mem_cached_kb() { return mem_in_kb_[kMemCached]; }
-    uint64_t mem_shmem_kb() { return mem_in_kb_[kMemShmem]; }
-    uint64_t mem_slab_kb() { return mem_in_kb_[kMemSlab]; }
-    uint64_t mem_slab_reclaimable_kb() { return mem_in_kb_[kMemSReclaim]; }
-    uint64_t mem_slab_unreclaimable_kb() { return mem_in_kb_[kMemSUnreclaim]; }
-    uint64_t mem_swap_kb() { return mem_in_kb_[kMemSwapTotal]; }
-    uint64_t mem_swap_free_kb() { return mem_in_kb_[kMemSwapFree]; }
-    uint64_t mem_mapped_kb() { return mem_in_kb_[kMemMapped]; }
-    uint64_t mem_vmalloc_used_kb() { return mem_in_kb_[kMemVmallocUsed]; }
-    uint64_t mem_page_tables_kb() { return mem_in_kb_[kMemPageTables]; }
-    uint64_t mem_kernel_stack_kb() { return mem_in_kb_[kMemKernelStack]; }
-    uint64_t mem_zram_kb(const std::string& zram_dev = "");
-
-  private:
-    std::map<std::string, uint64_t> mem_in_kb_;
-    bool MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev);
-    bool ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
-                     std::function<void(const std::string&, uint64_t)> store_val);
-};
-
-// Parse /proc/vmallocinfo and return total physical memory mapped
-// in vmalloc area by the kernel. Note that this deliberately ignores binder buffers. They are
-// _always_ mapped in a process and are counted for in each process.
-uint64_t ReadVmallocInfo(const std::string& path = "/proc/vmallocinfo");
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/Android.bp b/libmeminfo/libdmabufinfo/Android.bp
deleted file mode 100644
index 4aed45c..0000000
--- a/libmeminfo/libdmabufinfo/Android.bp
+++ /dev/null
@@ -1,56 +0,0 @@
-//
-// Copyright (C) 2019 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_defaults {
-    name: "dmabufinfo_defaults",
-    static_libs: [
-        "libbase",
-        "libprocinfo",
-    ],
-    shared_libs: [
-        "liblog",
-    ],
-
-    cflags: [
-        "-Wall",
-        "-Werror",
-        "-Wextra",
-    ],
-}
-
-cc_library_static {
-    name: "libdmabufinfo",
-    vendor_available: true,
-    defaults: ["dmabufinfo_defaults"],
-    export_include_dirs: ["include"],
-    srcs: [
-         "dmabufinfo.cpp",
-    ],
-}
-
-cc_test {
-    name: "dmabufinfo_test",
-    defaults: ["dmabufinfo_defaults"],
-    srcs: [
-         "dmabufinfo_test.cpp"
-    ],
-
-    static_libs: [
-        "libc++fs",
-        "libdmabufinfo",
-        "libion",
-        "libmeminfo",
-    ],
-}
diff --git a/libmeminfo/libdmabufinfo/dmabufinfo.cpp b/libmeminfo/libdmabufinfo/dmabufinfo.cpp
deleted file mode 100644
index 9fb22a1..0000000
--- a/libmeminfo/libdmabufinfo/dmabufinfo.cpp
+++ /dev/null
@@ -1,265 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <filesystem>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <procinfo/process_map.h>
-
-#include <dmabufinfo/dmabufinfo.h>
-
-namespace android {
-namespace dmabufinfo {
-
-static bool FileIsDmaBuf(const std::string& path) {
-    return ::android::base::StartsWith(path, "/dmabuf");
-}
-
-static bool ReadDmaBufFdInfo(pid_t pid, int fd, std::string* name, std::string* exporter,
-                             uint64_t* count) {
-    std::string fdinfo = ::android::base::StringPrintf("/proc/%d/fdinfo/%d", pid, fd);
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(fdinfo.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open dmabuf info from debugfs";
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-    while (getline(&line, &len, fp.get()) > 0) {
-        switch (line[0]) {
-            case 'c':
-                if (strncmp(line, "count:", 6) == 0) {
-                    char* c = line + 6;
-                    *count = strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'e':
-                if (strncmp(line, "exp_name:", 9) == 0) {
-                    char* c = line + 9;
-                    *exporter = ::android::base::Trim(c);
-                }
-                break;
-            case 'n':
-                if (strncmp(line, "name:", 5) == 0) {
-                    char* c = line + 5;
-                    *name = ::android::base::Trim(std::string(c));
-                }
-                break;
-        }
-    }
-
-    free(line);
-    return true;
-}
-
-// TODO: std::filesystem::is_symlink fails to link on vendor code,
-// forcing this workaround.
-// Move back to libc++fs once it is vendor-available. See b/124012728
-static bool is_symlink(const char *filename)
-{
-    struct stat p_statbuf;
-    if (lstat(filename, &p_statbuf) < 0) {
-        return false;
-    }
-    if (S_ISLNK(p_statbuf.st_mode) == 1) {
-        return true;
-    }
-    return false;
-}
-
-static bool ReadDmaBufFdRefs(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    std::string fdpath = ::android::base::StringPrintf("/proc/%d/fd", pid);
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir(fdpath.c_str()), closedir);
-    if (!dir) {
-        LOG(ERROR) << "Failed to open " << fdpath << " directory" << std::endl;
-        return false;
-    }
-    struct dirent* dent;
-    while ((dent = readdir(dir.get()))) {
-        std::string path =
-            ::android::base::StringPrintf("%s/%s", fdpath.c_str(), dent->d_name);
-
-        if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..") ||
-            !is_symlink(path.c_str())) {
-            continue;
-        }
-
-        std::string target;
-        if (!::android::base::Readlink(path, &target)) {
-            LOG(ERROR) << "Failed to find target for symlink: " << path;
-            return false;
-        }
-
-        if (!FileIsDmaBuf(target)) {
-            continue;
-        }
-
-        int fd;
-        if (!::android::base::ParseInt(dent->d_name, &fd)) {
-            LOG(ERROR) << "Dmabuf fd: " << path << " is invalid";
-            return false;
-        }
-
-        // Set defaults in case the kernel doesn't give us the information
-        // we need in fdinfo
-        std::string name = "<unknown>";
-        std::string exporter = "<unknown>";
-        uint64_t count = 0;
-        if (!ReadDmaBufFdInfo(pid, fd, &name, &exporter, &count)) {
-            LOG(ERROR) << "Failed to read fdinfo for: " << path;
-            return false;
-        }
-
-        struct stat sb;
-        if (stat(path.c_str(), &sb) < 0) {
-            PLOG(ERROR) << "Failed to stat: " << path;
-            return false;
-        }
-
-        uint64_t inode = sb.st_ino;
-        auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
-                                [&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
-        if (buf != dmabufs->end()) {
-            if (buf->name() == "" || buf->name() == "<unknown>") buf->SetName(name);
-            if (buf->exporter() == "" || buf->exporter() == "<unknown>") buf->SetExporter(exporter);
-            if (buf->count() == 0) buf->SetCount(count);
-            buf->AddFdRef(pid);
-            continue;
-        }
-
-        DmaBuffer& db = dmabufs->emplace_back(sb.st_ino, sb.st_blocks * 512, count, exporter, name);
-        db.AddFdRef(pid);
-    }
-
-    return true;
-}
-
-static bool ReadDmaBufMapRefs(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    std::string mapspath = ::android::base::StringPrintf("/proc/%d/maps", pid);
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(mapspath.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open maps for pid: " << pid;
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-
-    // Process the map if it is dmabuf. Add map reference to existing object in 'dmabufs'
-    // if it was already found. If it wasn't create a new one and append it to 'dmabufs'
-    auto account_dmabuf = [&](uint64_t start, uint64_t end, uint16_t /* flags */,
-                              uint64_t /* pgoff */, ino_t inode, const char* name) {
-        // no need to look into this mapping if it is not dmabuf
-        if (!FileIsDmaBuf(std::string(name))) {
-            return;
-        }
-
-        auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
-                                [&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
-        if (buf != dmabufs->end()) {
-            buf->AddMapRef(pid);
-            return;
-        }
-
-        // We have a new buffer, but unknown count and name
-        DmaBuffer& dbuf = dmabufs->emplace_back(inode, end - start, 0, "<unknown>", "<unknown>");
-        dbuf.AddMapRef(pid);
-    };
-
-    while (getline(&line, &len, fp.get()) > 0) {
-        if (!::android::procinfo::ReadMapFileContent(line, account_dmabuf)) {
-            LOG(ERROR) << "Failed t parse maps for pid: " << pid;
-            return false;
-        }
-    }
-
-    free(line);
-    return true;
-}
-
-// Public methods
-bool ReadDmaBufInfo(std::vector<DmaBuffer>* dmabufs, const std::string& path) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        LOG(ERROR) << "Failed to open dmabuf info from debugfs";
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t len = 0;
-    dmabufs->clear();
-    while (getline(&line, &len, fp.get()) > 0) {
-        // The new dmabuf bufinfo format adds inode number and a name at the end
-        // We are looking for lines as follows:
-        // size     flags       mode        count  exp_name ino         name
-        // 01048576 00000002    00000007    00000001    ion 00018758    CAMERA
-        // 01048576 00000002    00000007    00000001    ion 00018758
-        uint64_t size, count;
-        char* exporter_name = nullptr;
-        ino_t inode;
-        char* name = nullptr;
-        int matched = sscanf(line, "%" SCNu64 "%*x %*x %" SCNu64 " %ms %lu %ms", &size, &count,
-                             &exporter_name, &inode, &name);
-        if (matched < 4) {
-            continue;
-        }
-        dmabufs->emplace_back(inode, size, count, exporter_name, matched > 4 ? name : "");
-        free(exporter_name);
-        free(name);
-    }
-
-    free(line);
-
-    return true;
-}
-
-bool ReadDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    dmabufs->clear();
-    return AppendDmaBufInfo(pid, dmabufs);
-}
-
-bool AppendDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs) {
-    if (!ReadDmaBufFdRefs(pid, dmabufs)) {
-        LOG(ERROR) << "Failed to read dmabuf fd references";
-        return false;
-    }
-
-    if (!ReadDmaBufMapRefs(pid, dmabufs)) {
-        LOG(ERROR) << "Failed to read dmabuf map references";
-        return false;
-    }
-    return true;
-}
-
-}  // namespace dmabufinfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp b/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp
deleted file mode 100644
index 7bba599..0000000
--- a/libmeminfo/libdmabufinfo/dmabufinfo_test.cpp
+++ /dev/null
@@ -1,489 +0,0 @@
-/* Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <gtest/gtest.h>
-#include <inttypes.h>
-#include <linux/dma-buf.h>
-#include <poll.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <string>
-#include <unordered_map>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/unique_fd.h>
-#include <ion/ion.h>
-
-#include <dmabufinfo/dmabufinfo.h>
-
-using namespace ::android::dmabufinfo;
-using namespace ::android::base;
-
-#define MAX_HEAP_NAME 32
-#define ION_HEAP_ANY_MASK (0x7fffffff)
-
-struct ion_heap_data {
-    char name[MAX_HEAP_NAME];
-    __u32 type;
-    __u32 heap_id;
-    __u32 reserved0;
-    __u32 reserved1;
-    __u32 reserved2;
-};
-
-#ifndef DMA_BUF_SET_NAME
-#define DMA_BUF_SET_NAME _IOW(DMA_BUF_BASE, 5, const char*)
-#endif
-
-class fd_sharer {
-  public:
-    fd_sharer();
-    ~fd_sharer() { kill(); }
-
-    bool ok() const { return child_pid > 0; }
-    bool sendfd(int fd);
-    bool kill();
-    pid_t pid() const { return child_pid; }
-
-  private:
-    unique_fd parent_fd, child_fd;
-    pid_t child_pid;
-
-    void run();
-};
-
-fd_sharer::fd_sharer() : parent_fd{}, child_fd{}, child_pid{-1} {
-    bool sp_ok = android::base::Socketpair(SOCK_STREAM, &parent_fd, &child_fd);
-    if (!sp_ok) return;
-
-    child_pid = fork();
-    if (child_pid < 0) return;
-
-    if (child_pid == 0) run();
-}
-
-bool fd_sharer::kill() {
-    int err = ::kill(child_pid, SIGKILL);
-    if (err < 0) return false;
-
-    return ::waitpid(child_pid, nullptr, 0) == child_pid;
-}
-
-void fd_sharer::run() {
-    while (true) {
-        int fd;
-        char unused = 0;
-
-        iovec iov{};
-        iov.iov_base = &unused;
-        iov.iov_len = sizeof(unused);
-
-        msghdr msg{};
-        msg.msg_iov = &iov;
-        msg.msg_iovlen = 1;
-
-        char cmsg_buf[CMSG_SPACE(sizeof(fd))];
-        msg.msg_control = cmsg_buf;
-        msg.msg_controllen = sizeof(cmsg_buf);
-
-        cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-        cmsg->cmsg_level = SOL_SOCKET;
-        cmsg->cmsg_type = SCM_RIGHTS;
-        cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
-
-        ssize_t s = TEMP_FAILURE_RETRY(recvmsg(child_fd, &msg, 0));
-        if (s == -1) break;
-
-        s = TEMP_FAILURE_RETRY(write(child_fd, &unused, sizeof(unused)));
-        if (s == -1) break;
-    }
-}
-
-bool fd_sharer::sendfd(int fd) {
-    char unused = 0;
-
-    iovec iov{};
-    iov.iov_base = &unused;
-    iov.iov_len = sizeof(unused);
-
-    msghdr msg{};
-    msg.msg_iov = &iov;
-    msg.msg_iovlen = 1;
-
-    char cmsg_buf[CMSG_SPACE(sizeof(fd))];
-    msg.msg_control = cmsg_buf;
-    msg.msg_controllen = sizeof(cmsg_buf);
-
-    cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
-    cmsg->cmsg_level = SOL_SOCKET;
-    cmsg->cmsg_type = SCM_RIGHTS;
-    cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
-
-    int* fd_buf = reinterpret_cast<int*>(CMSG_DATA(cmsg));
-    *fd_buf = fd;
-
-    ssize_t s = TEMP_FAILURE_RETRY(sendmsg(parent_fd, &msg, 0));
-    if (s == -1) return false;
-
-    // The target process installs the fd into its fd table during recvmsg().
-    // So if we return now, there's a brief window between sendfd() finishing
-    // and libmemoryinfo actually seeing that the buffer has been shared.  This
-    // window is just large enough to break tests.
-    //
-    // To work around this, wait for the target process to respond with a dummy
-    // byte, with a timeout of 1 s.
-    pollfd p{};
-    p.fd = parent_fd;
-    p.events = POLL_IN;
-    int ready = poll(&p, 1, 1000);
-    if (ready != 1) return false;
-
-    s = TEMP_FAILURE_RETRY(read(parent_fd, &unused, sizeof(unused)));
-    if (s == -1) return false;
-
-    return true;
-}
-
-#define EXPECT_ONE_BUF_EQ(_bufptr, _name, _fdrefs, _maprefs, _expname, _count, _size) \
-    do {                                                                              \
-        EXPECT_EQ(_bufptr->name(), _name);                                            \
-        EXPECT_EQ(_bufptr->fdrefs().size(), _fdrefs);                                 \
-        EXPECT_EQ(_bufptr->maprefs().size(), _maprefs);                               \
-        EXPECT_EQ(_bufptr->exporter(), _expname);                                     \
-        EXPECT_EQ(_bufptr->count(), _count);                                          \
-        EXPECT_EQ(_bufptr->size(), _size);                                            \
-    } while (0)
-
-#define EXPECT_PID_IN_FDREFS(_bufptr, _pid, _expect)                         \
-    do {                                                                     \
-        const std::unordered_map<pid_t, int>& _fdrefs = _bufptr->fdrefs();   \
-        auto _ref = _fdrefs.find(_pid);                                      \
-        EXPECT_EQ((_ref != _fdrefs.end()), _expect);                         \
-    } while (0)
-
-#define EXPECT_PID_IN_MAPREFS(_bufptr, _pid, _expect)                        \
-    do {                                                                     \
-        const std::unordered_map<pid_t, int>& _maprefs = _bufptr->maprefs(); \
-        auto _ref = _maprefs.find(_pid);                                     \
-        EXPECT_EQ((_ref != _maprefs.end()), _expect);                        \
-    } while (0)
-
-TEST(DmaBufInfoParser, TestReadDmaBufInfo) {
-    std::string bufinfo = R"bufinfo(00045056    00000002    00000007    00000002    ion 00022069    
-	Attached Devices:
-Total 0 devices attached
-01048576    00000002    00000007    00000001    ion 00019834    CAMERA
-	Attached Devices:
-	soc:qcom,cam_smmu:msm_cam_smmu_icp
-Total 1 devices attached)bufinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(bufinfo, tf.fd));
-    std::string path = std::string(tf.path);
-
-    std::vector<DmaBuffer> dmabufs;
-    EXPECT_TRUE(ReadDmaBufInfo(&dmabufs, path));
-
-    EXPECT_EQ(dmabufs.size(), 2UL);
-
-    EXPECT_EQ(dmabufs[0].size(), 45056UL);
-    EXPECT_EQ(dmabufs[0].inode(), 22069UL);
-    EXPECT_EQ(dmabufs[0].count(), 2UL);
-    EXPECT_EQ(dmabufs[0].exporter(), "ion");
-    EXPECT_TRUE(dmabufs[0].name().empty());
-    EXPECT_EQ(dmabufs[0].total_refs(), 0ULL);
-    EXPECT_TRUE(dmabufs[0].fdrefs().empty());
-    EXPECT_TRUE(dmabufs[0].maprefs().empty());
-
-    EXPECT_EQ(dmabufs[1].size(), 1048576UL);
-    EXPECT_EQ(dmabufs[1].inode(), 19834UL);
-    EXPECT_EQ(dmabufs[1].count(), 1UL);
-    EXPECT_EQ(dmabufs[1].exporter(), "ion");
-    EXPECT_FALSE(dmabufs[1].name().empty());
-    EXPECT_EQ(dmabufs[1].name(), "CAMERA");
-    EXPECT_EQ(dmabufs[1].total_refs(), 0ULL);
-    EXPECT_TRUE(dmabufs[1].fdrefs().empty());
-    EXPECT_TRUE(dmabufs[1].maprefs().empty());
-}
-
-class DmaBufTester : public ::testing::Test {
-  public:
-    DmaBufTester() : ion_fd(ion_open()), ion_heap_mask(get_ion_heap_mask()) {}
-
-    ~DmaBufTester() {
-        if (ion_fd >= 0) {
-            ion_close(ion_fd);
-        }
-    }
-
-    bool is_valid() { return (ion_fd >= 0 && ion_heap_mask > 0); }
-
-    unique_fd allocate(uint64_t size, const std::string& name) {
-        int fd;
-        int err = ion_alloc_fd(ion_fd, size, 0, ion_heap_mask, 0, &fd);
-        if (err < 0) {
-            printf("Failed ion_alloc_fd, return value: %d\n", err);
-            return unique_fd{};
-        }
-
-        if (!name.empty()) {
-            if (ioctl(fd, DMA_BUF_SET_NAME, name.c_str()) == -1) {
-                printf("Failed ioctl(DMA_BUF_SET_NAME): %s\n", strerror(errno));
-                close(fd);
-                return unique_fd{};
-            }
-        }
-
-        return unique_fd{fd};
-    }
-
-    void readAndCheckDmaBuffer(std::vector<DmaBuffer>* dmabufs, pid_t pid, const std::string name,
-                               size_t fdrefs_size, size_t maprefs_size, const std::string exporter,
-                               size_t refcount, uint64_t buf_size, bool expectFdrefs,
-                               bool expectMapRefs) {
-        EXPECT_TRUE(ReadDmaBufInfo(pid, dmabufs));
-        EXPECT_EQ(dmabufs->size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs->begin(), name, fdrefs_size, maprefs_size, exporter, refcount,
-                          buf_size);
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs->begin(), pid, expectFdrefs);
-        EXPECT_PID_IN_MAPREFS(dmabufs->begin(), pid, expectMapRefs);
-    }
-
-    bool checkPidRef(DmaBuffer& dmabuf, pid_t pid, int expectFdrefs) {
-        int fdrefs = dmabuf.fdrefs().find(pid)->second;
-        return fdrefs == expectFdrefs;
-    }
-
-  private:
-    int get_ion_heap_mask() {
-        if (ion_fd < 0) {
-            return 0;
-        }
-
-        if (ion_is_legacy(ion_fd)) {
-            // Since ION is still in staging, we've seen that the heap mask ids are also
-            // changed across kernels for some reason. So, here we basically ask for a buffer
-            // from _any_ heap.
-            return ION_HEAP_ANY_MASK;
-        }
-
-        int cnt;
-        int err = ion_query_heap_cnt(ion_fd, &cnt);
-        if (err < 0) {
-            return err;
-        }
-
-        std::vector<ion_heap_data> heaps;
-        heaps.resize(cnt);
-        err = ion_query_get_heaps(ion_fd, cnt, &heaps[0]);
-        if (err < 0) {
-            return err;
-        }
-
-        unsigned int ret = 0;
-        for (auto& it : heaps) {
-            if (!strcmp(it.name, "ion_system_heap")) {
-                ret |= (1 << it.heap_id);
-            }
-        }
-
-        return ret;
-    }
-
-    int ion_fd;
-    const int ion_heap_mask;
-};
-
-TEST_F(DmaBufTester, TestFdRef) {
-    // Test if a dma buffer is found while the corresponding file descriptor
-    // is open
-    ASSERT_TRUE(is_valid());
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL);
-
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, true);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, TestMapRef) {
-    // Test to make sure we can find a buffer if the fd is closed but the buffer
-    // is mapped
-    ASSERT_TRUE(is_valid());
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        auto ptr = mmap(0, 4096, PROT_READ, MAP_SHARED, buf, 0);
-        ASSERT_NE(ptr, MAP_FAILED);
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "dmabuftester-4k", 1UL, 1UL, "ion", 2UL, 4096ULL);
-
-        // Make sure the buffer has the right pid too.
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, true);
-        EXPECT_PID_IN_MAPREFS(dmabufs.begin(), pid, true);
-
-        // close the file descriptor and re-read the stats
-        buf.reset(-1);
-        ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-
-        EXPECT_EQ(dmabufs.size(), 1UL);
-        EXPECT_ONE_BUF_EQ(dmabufs.begin(), "<unknown>", 0UL, 1UL, "<unknown>", 0UL, 4096ULL);
-
-        EXPECT_PID_IN_FDREFS(dmabufs.begin(), pid, false);
-        EXPECT_PID_IN_MAPREFS(dmabufs.begin(), pid, true);
-
-        // unmap the bufer and lose all references
-        munmap(ptr, 4096);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, TestSharedfd) {
-    // Each time a shared buffer is received over a socket, the remote process
-    // will take an extra reference on it.
-
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        fd_sharer sharer{};
-        ASSERT_TRUE(sharer.ok());
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-
-        ASSERT_TRUE(sharer.sendfd(buf));
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 2UL,
-                              4096ULL, true, false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], sharer.pid(), 1));
-
-        ASSERT_TRUE(sharer.sendfd(buf));
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 3UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 3UL,
-                              4096ULL, true, false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], sharer.pid(), 2));
-
-        ASSERT_TRUE(sharer.kill());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, DupFdTest) {
-    // dup()ing an fd will make this process take an extra reference on the
-    // shared buffer.
-
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-
-        unique_fd buf2{dup(buf)};
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 2));
-
-        close(buf2.release());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-        EXPECT_TRUE(checkPidRef(dmabufs[0], pid, 1));
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-TEST_F(DmaBufTester, ForkTest) {
-    // fork()ing a child will cause the child to automatically take a reference
-    // on any existing shared buffers.
-    ASSERT_TRUE(is_valid());
-
-    pid_t pid = getpid();
-    std::vector<DmaBuffer> dmabufs;
-    {
-        // Allocate one buffer and make sure the library can see it
-        unique_fd buf = allocate(4096, "dmabuftester-4k");
-        ASSERT_GT(buf, 0) << "Allocated buffer is invalid";
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-        fd_sharer sharer{};
-        ASSERT_TRUE(sharer.ok());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 2UL, 4096ULL, true,
-                              false);
-        readAndCheckDmaBuffer(&dmabufs, sharer.pid(), "dmabuftester-4k", 1UL, 0UL, "ion", 2UL,
-                              4096ULL, true, false);
-        ASSERT_TRUE(sharer.kill());
-        readAndCheckDmaBuffer(&dmabufs, pid, "dmabuftester-4k", 1UL, 0UL, "ion", 1UL, 4096ULL, true,
-                              false);
-    }
-
-    // Now make sure the buffer has disappeared
-    ASSERT_TRUE(ReadDmaBufInfo(pid, &dmabufs));
-    EXPECT_TRUE(dmabufs.empty());
-}
-
-int main(int argc, char** argv) {
-    ::testing::InitGoogleTest(&argc, argv);
-    ::android::base::InitLogging(argv, android::base::StderrLogger);
-    return RUN_ALL_TESTS();
-}
diff --git a/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h b/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h
deleted file mode 100644
index a6e7f69..0000000
--- a/libmeminfo/libdmabufinfo/include/dmabufinfo/dmabufinfo.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <set>
-#include <string>
-#include <vector>
-#include <unordered_map>
-
-namespace android {
-namespace dmabufinfo {
-
-struct DmaBuffer {
-  public:
-    DmaBuffer(ino_t inode, uint64_t size, uint64_t count, const std::string& exporter,
-              const std::string& name)
-        : inode_(inode), size_(size), count_(count), exporter_(exporter), name_(name) {
-        total_refs_ = 0;
-    }
-    DmaBuffer() = default;
-    ~DmaBuffer() = default;
-
-    // Adds one file descriptor reference for the given pid
-    void AddFdRef(pid_t pid) {
-        AddRefToPidMap(pid, &fdrefs_);
-        total_refs_++;
-    }
-
-    // Adds one map reference for the given pid
-    void AddMapRef(pid_t pid) {
-        AddRefToPidMap(pid, &maprefs_);
-        total_refs_++;
-    }
-
-    // Getters for each property
-    uint64_t size() const { return size_; }
-    const std::unordered_map<pid_t, int>& fdrefs() const { return fdrefs_; }
-    const std::unordered_map<pid_t, int>& maprefs() const { return maprefs_; }
-    ino_t inode() const { return inode_; }
-    uint64_t total_refs() const { return total_refs_; }
-    uint64_t count() const { return count_; };
-    const std::set<pid_t>& pids() const { return pids_; }
-    const std::string& name() const { return name_; }
-    const std::string& exporter() const { return exporter_; }
-    void SetName(const std::string& name) { name_ = name; }
-    void SetExporter(const std::string& exporter) { exporter_ = exporter; }
-    void SetCount(uint64_t count) { count_ = count; }
-    uint64_t Pss() const { return size_ / pids_.size(); }
-
-    bool operator==(const DmaBuffer& rhs) {
-        return (inode_ == rhs.inode()) && (size_ == rhs.size()) && (name_ == rhs.name()) &&
-               (exporter_ == rhs.exporter());
-    }
-
-  private:
-    ino_t inode_;
-    uint64_t size_;
-    uint64_t count_;
-    uint64_t total_refs_;
-    std::set<pid_t> pids_;
-    std::string exporter_;
-    std::string name_;
-    std::unordered_map<pid_t, int> fdrefs_;
-    std::unordered_map<pid_t, int> maprefs_;
-    void AddRefToPidMap(pid_t pid, std::unordered_map<pid_t, int>* map) {
-        // The first time we find a ref, we set the ref count to 1
-        // otherwise, increment the existing ref count
-        auto [it, inserted] = map->insert(std::make_pair(pid, 1));
-        if (!inserted)
-            it->second++;
-        pids_.insert(pid);
-    }
-};
-
-// Read and return current dma buf objects from
-// DEBUGFS/dma_buf/bufinfo. The references to each dma buffer are not
-// populated here and will return an empty vector.
-// Returns false if something went wrong with the function, true otherwise.
-bool ReadDmaBufInfo(std::vector<DmaBuffer>* dmabufs,
-                    const std::string& path = "/sys/kernel/debug/dma_buf/bufinfo");
-
-
-// Read and return dmabuf objects for a given process without the help
-// of DEBUGFS
-// Returns false if something went wrong with the function, true otherwise.
-bool ReadDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs);
-
-// Append new dmabuf objects from a given process to an existing vector.
-// When the vector contains an existing element with a matching inode,
-// the reference counts will be updated.
-// Does not depend on DEBUGFS.
-// Returns false if something went wrong with the function, true otherwise.
-bool AppendDmaBufInfo(pid_t pid, std::vector<DmaBuffer>* dmabufs);
-
-}  // namespace dmabufinfo
-}  // namespace android
diff --git a/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp b/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp
deleted file mode 100644
index 48901b1..0000000
--- a/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <errno.h>
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <set>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <dmabufinfo/dmabufinfo.h>
-
-using DmaBuffer = ::android::dmabufinfo::DmaBuffer;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [-ah] [PID] \n"
-            "-a\t show all dma buffers (ion) in big table, [buffer x process] grid \n"
-            "-h\t show this help\n"
-            "  \t If PID is supplied, the dmabuf information for that process is shown.\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static std::string GetProcessComm(const pid_t pid) {
-    std::string pid_path = android::base::StringPrintf("/proc/%d/comm", pid);
-    std::ifstream in{pid_path};
-    if (!in) return std::string("N/A");
-    std::string line;
-    std::getline(in, line);
-    if (!in) return std::string("N/A");
-    return line;
-}
-
-static void PrintDmaBufTable(const std::vector<DmaBuffer>& bufs) {
-    if (bufs.empty()) {
-        printf("dmabuf info not found ¯\\_(ツ)_/¯\n");
-        return;
-    }
-
-    // Find all unique pids in the input vector, create a set
-    std::set<pid_t> pid_set;
-    for (auto& buf : bufs) {
-        pid_set.insert(buf.pids().begin(), buf.pids().end());
-    }
-
-    // Format the header string spaced and separated with '|'
-    printf("    Dmabuf Inode |            Size |      Ref Counts |");
-    for (auto pid : pid_set) {
-        printf("%16s:%-5d |", GetProcessComm(pid).c_str(), pid);
-    }
-    printf("\n");
-
-    // holds per-process dmabuf size in kB
-    std::map<pid_t, uint64_t> per_pid_size = {};
-    uint64_t dmabuf_total_size = 0;
-
-    // Iterate through all dmabufs and collect per-process sizes, refs
-    for (auto& buf : bufs) {
-        printf("%16ju |%13" PRIu64 " kB |%16" PRIu64 " |", static_cast<uintmax_t>(buf.inode()),
-               buf.size() / 1024, buf.total_refs());
-        // Iterate through each process to find out per-process references for each buffer,
-        // gather total size used by each process etc.
-        for (pid_t pid : pid_set) {
-            int pid_refs = 0;
-            if (buf.fdrefs().count(pid) == 1) {
-                // Get the total number of ref counts the process is holding
-                // on this buffer. We don't differentiate between mmap or fd.
-                pid_refs += buf.fdrefs().at(pid);
-                if (buf.maprefs().count(pid) == 1) {
-                    pid_refs += buf.maprefs().at(pid);
-                }
-            }
-
-            if (pid_refs) {
-                // Add up the per-pid total size. Note that if a buffer is mapped
-                // in 2 different processes, the size will be shown as mapped or opened
-                // in both processes. This is intended for visibility.
-                //
-                // If one wants to get the total *unique* dma buffers, they can simply
-                // sum the size of all dma bufs shown by the tool
-                per_pid_size[pid] += buf.size() / 1024;
-                printf("%17d refs |", pid_refs);
-            } else {
-                printf("%22s |", "--");
-            }
-        }
-        dmabuf_total_size += buf.size() / 1024;
-        printf("\n");
-    }
-
-    printf("------------------------------------\n");
-    printf("%-16s  %13" PRIu64 " kB |%16s |", "TOTALS", dmabuf_total_size, "n/a");
-    for (auto pid : pid_set) {
-        printf("%19" PRIu64 " kB |", per_pid_size[pid]);
-    }
-    printf("\n");
-
-    return;
-}
-
-static void PrintDmaBufPerProcess(const std::vector<DmaBuffer>& bufs) {
-    if (bufs.empty()) {
-        printf("dmabuf info not found ¯\\_(ツ)_/¯\n");
-        return;
-    }
-
-    // Create a reverse map from pid to dmabufs
-    std::unordered_map<pid_t, std::set<ino_t>> pid_to_inodes = {};
-    uint64_t total_size = 0;  // Total size of dmabufs in the system
-    uint64_t kernel_rss = 0;  // Total size of dmabufs NOT mapped or opened by a process
-    for (auto& buf : bufs) {
-        for (auto pid : buf.pids()) {
-            pid_to_inodes[pid].insert(buf.inode());
-        }
-        total_size += buf.size();
-        if (buf.fdrefs().empty() && buf.maprefs().empty()) {
-            kernel_rss += buf.size();
-        }
-    }
-    // Create an inode to dmabuf map. We know inodes are unique..
-    std::unordered_map<ino_t, DmaBuffer> inode_to_dmabuf;
-    for (auto buf : bufs) {
-        inode_to_dmabuf[buf.inode()] = buf;
-    }
-
-    uint64_t total_rss = 0, total_pss = 0;
-    for (auto& [pid, inodes] : pid_to_inodes) {
-        uint64_t pss = 0;
-        uint64_t rss = 0;
-
-        printf("%16s:%-5d\n", GetProcessComm(pid).c_str(), pid);
-        printf("%22s %16s %16s %16s %16s\n", "Name", "Rss", "Pss", "nr_procs", "Inode");
-        for (auto& inode : inodes) {
-            DmaBuffer& buf = inode_to_dmabuf[inode];
-            printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16zu %16" PRIuMAX "\n",
-                   buf.name().empty() ? "<unknown>" : buf.name().c_str(), buf.size() / 1024,
-                   buf.Pss() / 1024, buf.pids().size(), static_cast<uintmax_t>(buf.inode()));
-            rss += buf.size();
-            pss += buf.Pss();
-        }
-        printf("%22s %13" PRIu64 " kB %13" PRIu64 " kB %16s\n", "PROCESS TOTAL", rss / 1024,
-               pss / 1024, "");
-        printf("----------------------\n");
-        total_rss += rss;
-        total_pss += pss;
-    }
-    printf("dmabuf total: %" PRIu64 " kB kernel_rss: %" PRIu64 " kB userspace_rss: %" PRIu64
-           " kB userspace_pss: %" PRIu64 " kB\n ",
-           total_size / 1024, kernel_rss / 1024, total_rss / 1024, total_pss / 1024);
-}
-
-static bool ReadDmaBufs(std::vector<DmaBuffer>* bufs) {
-    bufs->clear();
-
-    if (!ReadDmaBufInfo(bufs)) {
-        fprintf(stderr, "debugfs entry for dmabuf not available, skipping\n");
-        return false;
-    }
-
-    std::unique_ptr<DIR, int (*)(DIR*)> dir(opendir("/proc"), closedir);
-    if (!dir) {
-        fprintf(stderr, "Failed to open /proc directory\n");
-        bufs->clear();
-        return false;
-    }
-
-    struct dirent* dent;
-    while ((dent = readdir(dir.get()))) {
-        if (dent->d_type != DT_DIR) continue;
-
-        int pid = atoi(dent->d_name);
-        if (pid == 0) {
-            continue;
-        }
-
-        if (!AppendDmaBufInfo(pid, bufs)) {
-            fprintf(stderr, "Unable to read dmabuf info for pid %d\n", pid);
-            bufs->clear();
-            return false;
-        }
-    }
-
-    return true;
-}
-
-int main(int argc, char* argv[]) {
-    struct option longopts[] = {{"all", no_argument, nullptr, 'a'},
-                                {"help", no_argument, nullptr, 'h'},
-                                {0, 0, nullptr, 0}};
-
-    int opt;
-    bool show_table = false;
-    while ((opt = getopt_long(argc, argv, "ah", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 'a':
-                show_table = true;
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    pid_t pid = -1;
-    if (optind < argc) {
-        if (show_table) {
-            fprintf(stderr, "Invalid arguments: -a does not need arguments\n");
-            usage(EXIT_FAILURE);
-        }
-        if (optind != (argc - 1)) {
-            fprintf(stderr, "Invalid arguments - only one [PID] argument is allowed\n");
-            usage(EXIT_FAILURE);
-        }
-        pid = atoi(argv[optind]);
-        if (pid == 0) {
-            fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-            usage(EXIT_FAILURE);
-        }
-    }
-
-    std::vector<DmaBuffer> bufs;
-    if (pid != -1) {
-        if (!ReadDmaBufInfo(pid, &bufs)) {
-            fprintf(stderr, "Unable to read dmabuf info for %d\n", pid);
-            exit(EXIT_FAILURE);
-        }
-    } else {
-        if (!ReadDmaBufs(&bufs)) exit(EXIT_FAILURE);
-    }
-
-    // Show the old dmabuf table, inode x process
-    if (show_table) {
-        PrintDmaBufTable(bufs);
-        return 0;
-    }
-
-    PrintDmaBufPerProcess(bufs);
-
-    return 0;
-}
diff --git a/libmeminfo/libmeminfo_benchmark.cpp b/libmeminfo/libmeminfo_benchmark.cpp
deleted file mode 100644
index d88919b..0000000
--- a/libmeminfo/libmeminfo_benchmark.cpp
+++ /dev/null
@@ -1,544 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/unique_fd.h>
-
-#include <benchmark/benchmark.h>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::SmapsOrRollupFromFile;
-using ::android::meminfo::SysMemInfo;
-
-enum {
-    MEMINFO_TOTAL,
-    MEMINFO_FREE,
-    MEMINFO_BUFFERS,
-    MEMINFO_CACHED,
-    MEMINFO_SHMEM,
-    MEMINFO_SLAB,
-    MEMINFO_SLAB_RECLAIMABLE,
-    MEMINFO_SLAB_UNRECLAIMABLE,
-    MEMINFO_SWAP_TOTAL,
-    MEMINFO_SWAP_FREE,
-    MEMINFO_ZRAM_TOTAL,
-    MEMINFO_MAPPED,
-    MEMINFO_VMALLOC_USED,
-    MEMINFO_PAGE_TABLES,
-    MEMINFO_KERNEL_STACK,
-    MEMINFO_COUNT
-};
-
-static void get_mem_info(uint64_t mem[], const char* file) {
-    char buffer[4096];
-    unsigned int numFound = 0;
-
-    int fd = open(file, O_RDONLY);
-
-    if (fd < 0) {
-        printf("Unable to open %s: %s\n", file, strerror(errno));
-        return;
-    }
-
-    const int len = read(fd, buffer, sizeof(buffer) - 1);
-    close(fd);
-
-    if (len < 0) {
-        printf("Empty %s\n", file);
-        return;
-    }
-    buffer[len] = 0;
-
-    static const char* const tags[] = {
-            "MemTotal:",     "MemFree:",    "Buffers:",     "Cached:",   "Shmem:", "Slab:",
-            "SReclaimable:", "SUnreclaim:", "SwapTotal:",   "SwapFree:", "ZRam:",  "Mapped:",
-            "VmallocUsed:",  "PageTables:", "KernelStack:", NULL};
-
-    static const int tagsLen[] = {9, 8, 8, 7, 6, 5, 13, 11, 10, 9, 5, 7, 12, 11, 12, 0};
-
-    memset(mem, 0, sizeof(uint64_t) * 15);
-    char* p = buffer;
-    while (*p && (numFound < (sizeof(tagsLen) / sizeof(tagsLen[0])))) {
-        int i = 0;
-        while (tags[i]) {
-            // std::cout << "tag =" << tags[i] << " p = " << std::string(p, tagsLen[i]) <<
-            // std::endl;
-            if (strncmp(p, tags[i], tagsLen[i]) == 0) {
-                p += tagsLen[i];
-                while (*p == ' ') p++;
-                char* num = p;
-                while (*p >= '0' && *p <= '9') p++;
-                if (*p != 0) {
-                    *p = 0;
-                    p++;
-                }
-                mem[i] = atoll(num);
-                numFound++;
-                break;
-            }
-            i++;
-        }
-        while (*p && *p != '\n') {
-            p++;
-        }
-        if (*p) p++;
-    }
-}
-
-static void BM_ReadMemInfo_old(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ::android::base::WriteStringToFd(meminfo, tf.fd);
-
-    uint64_t mem[MEMINFO_COUNT];
-    for (auto _ : state) {
-        get_mem_info(mem, tf.path);
-    }
-}
-BENCHMARK(BM_ReadMemInfo_old);
-
-static void BM_ReadMemInfo_new(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    android::base::WriteStringToFd(meminfo, tf.fd);
-
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    const std::vector<std::string> tags = {
-            SysMemInfo::kMemTotal,      SysMemInfo::kMemFree,        SysMemInfo::kMemBuffers,
-            SysMemInfo::kMemCached,     SysMemInfo::kMemShmem,       SysMemInfo::kMemSlab,
-            SysMemInfo::kMemSReclaim,   SysMemInfo::kMemSUnreclaim,  SysMemInfo::kMemSwapTotal,
-            SysMemInfo::kMemSwapFree,   SysMemInfo::kMemMapped,      SysMemInfo::kMemVmallocUsed,
-            SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack,
-    };
-
-    SysMemInfo smi;
-    for (auto _ : state) {
-        smi.ReadMemInfo(tags, &mem, file);
-    }
-}
-BENCHMARK(BM_ReadMemInfo_new);
-
-static uint64_t get_zram_mem_used(const std::string& zram_dir) {
-    FILE* f = fopen((zram_dir + "mm_stat").c_str(), "r");
-    if (f) {
-        uint64_t mem_used_total = 0;
-
-        int matched = fscanf(f, "%*d %*d %" SCNu64 " %*d %*d %*d %*d", &mem_used_total);
-        if (matched != 1)
-            fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mm_stat").c_str());
-
-        fclose(f);
-        return mem_used_total;
-    }
-
-    f = fopen((zram_dir + "mem_used_total").c_str(), "r");
-    if (f) {
-        uint64_t mem_used_total = 0;
-
-        int matched = fscanf(f, "%" SCNu64, &mem_used_total);
-        if (matched != 1)
-            fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mem_used_total").c_str());
-
-        fclose(f);
-        return mem_used_total;
-    }
-
-    return 0;
-}
-
-static void BM_ZramTotal_old(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    for (auto _ : state) {
-        uint64_t zram_total __attribute__((unused)) = get_zram_mem_used(zram_mmstat_dir) / 1024;
-    }
-}
-BENCHMARK(BM_ZramTotal_old);
-
-static void BM_ZramTotal_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    SysMemInfo smi;
-    for (auto _ : state) {
-        uint64_t zram_total __attribute__((unused)) = smi.mem_zram_kb(zram_mmstat_dir);
-    }
-}
-BENCHMARK(BM_ZramTotal_new);
-
-static void BM_MemInfoWithZram_old(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ::android::base::WriteStringToFd(meminfo, tf.fd);
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    uint64_t mem[MEMINFO_COUNT];
-    for (auto _ : state) {
-        get_mem_info(mem, tf.path);
-        mem[MEMINFO_ZRAM_TOTAL] = get_zram_mem_used("/sys/block/zram0/") / 1024;
-        CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u);
-    }
-}
-BENCHMARK(BM_MemInfoWithZram_old);
-
-static void BM_MemInfoWithZram_new(benchmark::State& state) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:             0 kB
-SwapFree:              0 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:           0 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    android::base::WriteStringToFd(meminfo, tf.fd);
-
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    std::vector<std::string> tags(SysMemInfo::kDefaultSysMemInfoTags);
-    auto it = tags.begin();
-    tags.insert(it + MEMINFO_ZRAM_TOTAL, "Zram:");
-    SysMemInfo smi;
-
-    for (auto _ : state) {
-        smi.ReadMemInfo(tags, &mem, file);
-        CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u);
-    }
-}
-BENCHMARK(BM_MemInfoWithZram_new);
-
-// Current implementation is in frameworks/base/core/jni/android_os_Debug.cpp.
-// That implementation is still buggy and it skips over vmalloc allocated memory by kernel modules.
-// This is the *fixed* version of the same implementation intended for benchmarking against the new
-// one.
-static uint64_t get_allocated_vmalloc_memory(const std::string& vm_file) {
-    char line[1024];
-
-    uint64_t vmalloc_allocated_size = 0;
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(vm_file.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return 0;
-    }
-
-    while (true) {
-        if (fgets(line, 1024, fp.get()) == NULL) {
-            break;
-        }
-
-        // check to see if there are pages mapped in vmalloc area
-        if (!strstr(line, "pages=")) {
-            continue;
-        }
-
-        long nr_pages;
-        if (sscanf(line, "%*x-%*x %*ld %*s pages=%ld", &nr_pages) == 1) {
-            vmalloc_allocated_size += (nr_pages * getpagesize());
-        } else if (sscanf(line, "%*x-%*x %*ld %*s %*s pages=%ld", &nr_pages) == 1) {
-            // The second case is for kernel modules. If allocation comes from the module,
-            // kernel puts an extra string containing the module name before "pages=" in
-            // the line.
-            //    See: https://elixir.bootlin.com/linux/latest/source/kernel/kallsyms.c#L373
-            vmalloc_allocated_size += (nr_pages * getpagesize());
-        }
-    }
-    return vmalloc_allocated_size;
-}
-
-static void BM_VmallocInfo_old_fixed(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string vmallocinfo =
-            ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str());
-    for (auto _ : state) {
-        CHECK_EQ(get_allocated_vmalloc_memory(vmallocinfo), 29884416);
-    }
-}
-BENCHMARK(BM_VmallocInfo_old_fixed);
-
-static void BM_VmallocInfo_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string vmallocinfo =
-            ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str());
-    for (auto _ : state) {
-        CHECK_EQ(::android::meminfo::ReadVmallocInfo(vmallocinfo), 29884416);
-    }
-}
-BENCHMARK(BM_VmallocInfo_new);
-
-// This implementation is picked up as-is from frameworks/base/core/jni/android_os_Debug.cpp
-// and only slightly modified to use std:unique_ptr.
-static bool get_smaps_rollup(const std::string path, MemUsage* rollup) {
-    char lineBuffer[1024];
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp != nullptr) {
-        char* line;
-        while (true) {
-            if (fgets(lineBuffer, sizeof(lineBuffer), fp.get()) == NULL) {
-                break;
-            }
-            line = lineBuffer;
-
-            switch (line[0]) {
-                case 'P':
-                    if (strncmp(line, "Pss:", 4) == 0) {
-                        char* c = line + 4;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->pss += atoi(c);
-                    } else if (strncmp(line, "Private_Clean:", 14) == 0 ||
-                               strncmp(line, "Private_Dirty:", 14) == 0) {
-                        char* c = line + 14;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->uss += atoi(c);
-                    }
-                    break;
-                case 'R':
-                    if (strncmp(line, "Rss:", 4) == 0) {
-                        char* c = line + 4;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        rollup->rss += atoi(c);
-                    }
-                    break;
-                case 'S':
-                    if (strncmp(line, "SwapPss:", 8) == 0) {
-                        char* c = line + 8;
-                        long lSwapPss;
-                        while (*c != 0 && (*c < '0' || *c > '9')) {
-                            c++;
-                        }
-                        lSwapPss = atoi(c);
-                        rollup->swap_pss += lSwapPss;
-                    }
-                    break;
-            }
-        }
-    } else {
-        return false;
-    }
-
-    return true;
-}
-
-static void BM_SmapsRollup_old(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps", exec_dir.c_str());
-    for (auto _ : state) {
-        MemUsage stats;
-        CHECK_EQ(get_smaps_rollup(path, &stats), true);
-        CHECK_EQ(stats.pss, 108384);
-    }
-}
-BENCHMARK(BM_SmapsRollup_old);
-
-static void BM_SmapsRollup_new(benchmark::State& state) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps", exec_dir.c_str());
-    for (auto _ : state) {
-        MemUsage stats;
-        CHECK_EQ(SmapsOrRollupFromFile(path, &stats), true);
-        CHECK_EQ(stats.pss, 108384);
-    }
-}
-BENCHMARK(BM_SmapsRollup_new);
-
-BENCHMARK_MAIN();
diff --git a/libmeminfo/libmeminfo_test.cpp b/libmeminfo/libmeminfo_test.cpp
deleted file mode 100644
index 378a4cd..0000000
--- a/libmeminfo/libmeminfo_test.cpp
+++ /dev/null
@@ -1,781 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <string>
-#include <vector>
-
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-
-using namespace std;
-using namespace android::meminfo;
-
-pid_t pid = -1;
-
-TEST(ProcMemInfo, TestWorkingTestReset) {
-    // Expect reset to succeed
-    EXPECT_TRUE(ProcMemInfo::ResetWorkingSet(pid));
-}
-
-TEST(ProcMemInfo, UsageEmpty) {
-    // If we created the object for getting working set,
-    // the usage must be empty
-    ProcMemInfo proc_mem(pid, true);
-    const MemUsage& usage = proc_mem.Usage();
-    EXPECT_EQ(usage.rss, 0);
-    EXPECT_EQ(usage.vss, 0);
-    EXPECT_EQ(usage.pss, 0);
-    EXPECT_EQ(usage.uss, 0);
-    EXPECT_EQ(usage.swap, 0);
-}
-
-TEST(ProcMemInfo, MapsNotEmpty) {
-    // Make sure the process maps are never empty
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.Maps();
-    EXPECT_FALSE(maps.empty());
-}
-
-TEST(ProcMemInfo, MapsUsageNotEmpty) {
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.Maps();
-    EXPECT_FALSE(maps.empty());
-    uint64_t total_pss = 0;
-    uint64_t total_rss = 0;
-    uint64_t total_uss = 0;
-    for (auto& map : maps) {
-        ASSERT_NE(0, map.usage.vss);
-        total_rss += map.usage.rss;
-        total_pss += map.usage.pss;
-        total_uss += map.usage.uss;
-    }
-
-    // Crude check that stats are actually being read.
-    EXPECT_NE(0, total_rss) << "RSS zero for all maps, that is not possible.";
-    EXPECT_NE(0, total_pss) << "PSS zero for all maps, that is not possible.";
-    EXPECT_NE(0, total_uss) << "USS zero for all maps, that is not possible.";
-}
-
-TEST(ProcMemInfo, MapsUsageEmpty) {
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
-    EXPECT_FALSE(maps.empty());
-    // Verify that all usage stats are zero in every map.
-    for (auto& map : maps) {
-        ASSERT_EQ(0, map.usage.vss);
-        ASSERT_EQ(0, map.usage.rss);
-        ASSERT_EQ(0, map.usage.pss);
-        ASSERT_EQ(0, map.usage.uss);
-        ASSERT_EQ(0, map.usage.swap);
-        ASSERT_EQ(0, map.usage.swap_pss);
-        ASSERT_EQ(0, map.usage.private_clean);
-        ASSERT_EQ(0, map.usage.private_dirty);
-        ASSERT_EQ(0, map.usage.shared_clean);
-        ASSERT_EQ(0, map.usage.shared_dirty);
-    }
-}
-
-TEST(ProcMemInfo, MapsUsageFillInLater) {
-    ProcMemInfo proc_mem(pid);
-    const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
-    EXPECT_FALSE(maps.empty());
-    for (auto& map : maps) {
-        Vma update_map(map);
-        ASSERT_EQ(map.start, update_map.start);
-        ASSERT_EQ(map.end, update_map.end);
-        ASSERT_EQ(map.offset, update_map.offset);
-        ASSERT_EQ(map.flags, update_map.flags);
-        ASSERT_EQ(map.name, update_map.name);
-        ASSERT_EQ(0, update_map.usage.vss);
-        ASSERT_EQ(0, update_map.usage.rss);
-        ASSERT_EQ(0, update_map.usage.pss);
-        ASSERT_EQ(0, update_map.usage.uss);
-        ASSERT_EQ(0, update_map.usage.swap);
-        ASSERT_EQ(0, update_map.usage.swap_pss);
-        ASSERT_EQ(0, update_map.usage.private_clean);
-        ASSERT_EQ(0, update_map.usage.private_dirty);
-        ASSERT_EQ(0, update_map.usage.shared_clean);
-        ASSERT_EQ(0, update_map.usage.shared_dirty);
-        ASSERT_TRUE(proc_mem.FillInVmaStats(update_map));
-        // Check that at least one usage stat was updated.
-        ASSERT_NE(0, update_map.usage.vss);
-    }
-}
-
-TEST(ProcMemInfo, PageMapPresent) {
-    static constexpr size_t kNumPages = 20;
-    size_t pagesize = getpagesize();
-    void* ptr = mmap(nullptr, pagesize * (kNumPages + 2), PROT_READ | PROT_WRITE,
-                     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-    ASSERT_NE(MAP_FAILED, ptr);
-
-    // Unmap the first page and the last page so that we guarantee this
-    // map is in a map by itself.
-    ASSERT_EQ(0, munmap(ptr, pagesize));
-    uintptr_t addr = reinterpret_cast<uintptr_t>(ptr) + pagesize;
-    ASSERT_EQ(0, munmap(reinterpret_cast<void*>(addr + kNumPages * pagesize), pagesize));
-
-    ProcMemInfo proc_mem(getpid());
-    const std::vector<Vma>& maps = proc_mem.MapsWithoutUsageStats();
-    ASSERT_FALSE(maps.empty());
-
-    // Find the vma associated with our previously created map.
-    const Vma* test_vma = nullptr;
-    for (const Vma& vma : maps) {
-        if (vma.start == addr) {
-            test_vma = &vma;
-            break;
-        }
-    }
-    ASSERT_TRUE(test_vma != nullptr) << "Cannot find test map.";
-
-    // Verify that none of the pages are listed as present.
-    std::vector<uint64_t> pagemap;
-    ASSERT_TRUE(proc_mem.PageMap(*test_vma, &pagemap));
-    ASSERT_EQ(kNumPages, pagemap.size());
-    for (size_t i = 0; i < pagemap.size(); i++) {
-        EXPECT_FALSE(android::meminfo::page_present(pagemap[i]))
-                << "Page " << i << " is present and it should not be.";
-    }
-
-    // Make some of the pages present and verify that we see them
-    // as present.
-    uint8_t* data = reinterpret_cast<uint8_t*>(addr);
-    data[0] = 1;
-    data[pagesize * 5] = 1;
-    data[pagesize * 11] = 1;
-
-    ASSERT_TRUE(proc_mem.PageMap(*test_vma, &pagemap));
-    ASSERT_EQ(kNumPages, pagemap.size());
-    for (size_t i = 0; i < pagemap.size(); i++) {
-        if (i == 0 || i == 5 || i == 11) {
-            EXPECT_TRUE(android::meminfo::page_present(pagemap[i]))
-                    << "Page " << i << " is not present and it should be.";
-        } else {
-            EXPECT_FALSE(android::meminfo::page_present(pagemap[i]))
-                    << "Page " << i << " is present and it should not be.";
-        }
-    }
-
-    ASSERT_EQ(0, munmap(reinterpret_cast<void*>(addr), kNumPages * pagesize));
-}
-
-TEST(ProcMemInfo, WssEmpty) {
-    // If we created the object for getting usage,
-    // the working set must be empty
-    ProcMemInfo proc_mem(pid, false);
-    const MemUsage& wss = proc_mem.Wss();
-    EXPECT_EQ(wss.rss, 0);
-    EXPECT_EQ(wss.vss, 0);
-    EXPECT_EQ(wss.pss, 0);
-    EXPECT_EQ(wss.uss, 0);
-    EXPECT_EQ(wss.swap, 0);
-}
-
-TEST(ProcMemInfo, SwapOffsetsEmpty) {
-    // If we created the object for getting working set,
-    // the swap offsets must be empty
-    ProcMemInfo proc_mem(pid, true);
-    const std::vector<uint16_t>& swap_offsets = proc_mem.SwapOffsets();
-    EXPECT_EQ(swap_offsets.size(), 0);
-}
-
-TEST(ProcMemInfo, IsSmapsSupportedTest) {
-    // Get any pid and check if /proc/<pid>/smaps_rollup exists using the API.
-    // The API must return the appropriate value regardless of the after it succeeds
-    // once.
-    std::string path = ::android::base::StringPrintf("/proc/%d/smaps_rollup", pid);
-    bool supported = IsSmapsRollupSupported(pid);
-    EXPECT_EQ(!access(path.c_str(), F_OK | R_OK), supported);
-    // Second call must return what the first one returned regardless of the pid parameter.
-    // So, deliberately pass invalid pid.
-    EXPECT_EQ(supported, IsSmapsRollupSupported(-1));
-}
-
-TEST(ProcMemInfo, SmapsOrRollupTest) {
-    // Make sure we can parse 'smaps_rollup' correctly
-    std::string rollup =
-            R"rollup(12c00000-7fe859e000 ---p 00000000 00:00 0                                [rollup]
-Rss:              331908 kB
-Pss:              202052 kB
-Shared_Clean:     158492 kB
-Shared_Dirty:      18928 kB
-Private_Clean:     90472 kB
-Private_Dirty:     64016 kB
-Referenced:       318700 kB
-Anonymous:         81984 kB
-AnonHugePages:         0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:               5344 kB
-SwapPss:             442 kB
-Locked:          1523537 kB)rollup";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(rollup, tf.fd));
-
-    MemUsage stats;
-    ASSERT_EQ(SmapsOrRollupFromFile(tf.path, &stats), true);
-    EXPECT_EQ(stats.rss, 331908);
-    EXPECT_EQ(stats.pss, 202052);
-    EXPECT_EQ(stats.uss, 154488);
-    EXPECT_EQ(stats.private_clean, 90472);
-    EXPECT_EQ(stats.private_dirty, 64016);
-    EXPECT_EQ(stats.swap_pss, 442);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupSmapsTest) {
-    // Make sure /proc/<pid>/smaps is parsed correctly
-    std::string smaps =
-            R"smaps(12c00000-13440000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               8448 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                2652 kB
-Pss:                2652 kB
-Shared_Clean:        840 kB
-Shared_Dirty:         40 kB
-Private_Clean:        84 kB
-Private_Dirty:      2652 kB
-Referenced:         2652 kB
-Anonymous:          2652 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                102 kB
-SwapPss:              70 kB
-Locked:             2652 kB
-VmFlags: rd wr mr mw me ac 
-)smaps";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(smaps, tf.fd));
-
-    MemUsage stats;
-    ASSERT_EQ(SmapsOrRollupFromFile(tf.path, &stats), true);
-    EXPECT_EQ(stats.rss, 2652);
-    EXPECT_EQ(stats.pss, 2652);
-    EXPECT_EQ(stats.uss, 2736);
-    EXPECT_EQ(stats.private_clean, 84);
-    EXPECT_EQ(stats.private_dirty, 2652);
-    EXPECT_EQ(stats.swap_pss, 70);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupPssRollupTest) {
-    // Make sure /proc/<pid>/smaps is parsed correctly
-    // to get the PSS
-    std::string smaps =
-            R"smaps(12c00000-13440000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               8448 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                2652 kB
-Pss:                2652 kB
-Shared_Clean:        840 kB
-Shared_Dirty:         40 kB
-Private_Clean:        84 kB
-Private_Dirty:      2652 kB
-Referenced:         2652 kB
-Anonymous:          2652 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                102 kB
-SwapPss:              70 kB
-Locked:             2652 kB
-VmFlags: rd wr mr mw me ac 
-)smaps";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(smaps, tf.fd));
-
-    uint64_t pss;
-    ASSERT_EQ(SmapsOrRollupPssFromFile(tf.path, &pss), true);
-    EXPECT_EQ(pss, 2652);
-}
-
-TEST(ProcMemInfo, SmapsOrRollupPssSmapsTest) {
-    // Correctly parse smaps file to gather pss
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-
-    uint64_t pss;
-    ASSERT_EQ(SmapsOrRollupPssFromFile(path, &pss), true);
-    EXPECT_EQ(pss, 19119);
-}
-
-TEST(ProcMemInfo, ForEachVmaFromFileTest) {
-    // Parse smaps file correctly to make callbacks for each virtual memory area (vma)
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-    ProcMemInfo proc_mem(pid);
-
-    std::vector<Vma> vmas;
-    auto collect_vmas = [&](const Vma& v) { vmas.push_back(v); };
-    ASSERT_TRUE(ForEachVmaFromFile(path, collect_vmas));
-
-    // We should get a total of 6 vmas
-    ASSERT_EQ(vmas.size(), 6);
-
-    // Expect values to be equal to what we have in testdata1/smaps_short
-    // Check for sizes first
-    ASSERT_EQ(vmas[0].usage.vss, 32768);
-    EXPECT_EQ(vmas[1].usage.vss, 11204);
-    EXPECT_EQ(vmas[2].usage.vss, 16896);
-    EXPECT_EQ(vmas[3].usage.vss, 260);
-    EXPECT_EQ(vmas[4].usage.vss, 6060);
-    EXPECT_EQ(vmas[5].usage.vss, 4);
-
-    // Check for names
-    EXPECT_EQ(vmas[0].name, "[anon:dalvik-zygote-jit-code-cache]");
-    EXPECT_EQ(vmas[1].name, "/system/framework/x86_64/boot-framework.art");
-    EXPECT_TRUE(vmas[2].name == "[anon:libc_malloc]" ||
-                android::base::StartsWith(vmas[2].name, "[anon:scudo:"))
-            << "Unknown map name " << vmas[2].name;
-    EXPECT_EQ(vmas[3].name, "/system/priv-app/SettingsProvider/oat/x86_64/SettingsProvider.odex");
-    EXPECT_EQ(vmas[4].name, "/system/lib64/libhwui.so");
-    EXPECT_EQ(vmas[5].name, "[vsyscall]");
-
-    EXPECT_EQ(vmas[0].usage.rss, 2048);
-    EXPECT_EQ(vmas[1].usage.rss, 11188);
-    EXPECT_EQ(vmas[2].usage.rss, 15272);
-    EXPECT_EQ(vmas[3].usage.rss, 260);
-    EXPECT_EQ(vmas[4].usage.rss, 4132);
-    EXPECT_EQ(vmas[5].usage.rss, 0);
-
-    EXPECT_EQ(vmas[0].usage.pss, 113);
-    EXPECT_EQ(vmas[1].usage.pss, 2200);
-    EXPECT_EQ(vmas[2].usage.pss, 15272);
-    EXPECT_EQ(vmas[3].usage.pss, 260);
-    EXPECT_EQ(vmas[4].usage.pss, 1274);
-    EXPECT_EQ(vmas[5].usage.pss, 0);
-
-    EXPECT_EQ(vmas[0].usage.uss, 0);
-    EXPECT_EQ(vmas[1].usage.uss, 1660);
-    EXPECT_EQ(vmas[2].usage.uss, 15272);
-    EXPECT_EQ(vmas[3].usage.uss, 260);
-    EXPECT_EQ(vmas[4].usage.uss, 0);
-    EXPECT_EQ(vmas[5].usage.uss, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_clean, 0);
-    EXPECT_EQ(vmas[1].usage.private_clean, 0);
-    EXPECT_EQ(vmas[2].usage.private_clean, 0);
-    EXPECT_EQ(vmas[3].usage.private_clean, 260);
-    EXPECT_EQ(vmas[4].usage.private_clean, 0);
-    EXPECT_EQ(vmas[5].usage.private_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[1].usage.private_dirty, 1660);
-    EXPECT_EQ(vmas[2].usage.private_dirty, 15272);
-    EXPECT_EQ(vmas[3].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.private_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[1].usage.shared_clean, 80);
-    EXPECT_EQ(vmas[2].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[3].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[4].usage.shared_clean, 4132);
-    EXPECT_EQ(vmas[5].usage.shared_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_dirty, 2048);
-    EXPECT_EQ(vmas[1].usage.shared_dirty, 9448);
-    EXPECT_EQ(vmas[2].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[3].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.shared_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap, 0);
-    EXPECT_EQ(vmas[1].usage.swap, 0);
-    EXPECT_EQ(vmas[2].usage.swap, 0);
-    EXPECT_EQ(vmas[3].usage.swap, 0);
-    EXPECT_EQ(vmas[4].usage.swap, 0);
-    EXPECT_EQ(vmas[5].usage.swap, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[1].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[2].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[3].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[4].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[5].usage.swap_pss, 0);
-}
-
-TEST(ProcMemInfo, SmapsReturnTest) {
-    // Make sure Smaps() is never empty for any process
-    ProcMemInfo proc_mem(pid);
-    auto vmas = proc_mem.Smaps();
-    EXPECT_FALSE(vmas.empty());
-}
-
-TEST(ProcMemInfo, SmapsTest) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-    std::string path = ::android::base::StringPrintf("%s/testdata1/smaps_short", exec_dir.c_str());
-    ProcMemInfo proc_mem(pid);
-    auto vmas = proc_mem.Smaps(path);
-
-    ASSERT_FALSE(vmas.empty());
-    // We should get a total of 6 vmas
-    ASSERT_EQ(vmas.size(), 6);
-
-    // Expect values to be equal to what we have in testdata1/smaps_short
-    // Check for sizes first
-    ASSERT_EQ(vmas[0].usage.vss, 32768);
-    EXPECT_EQ(vmas[1].usage.vss, 11204);
-    EXPECT_EQ(vmas[2].usage.vss, 16896);
-    EXPECT_EQ(vmas[3].usage.vss, 260);
-    EXPECT_EQ(vmas[4].usage.vss, 6060);
-    EXPECT_EQ(vmas[5].usage.vss, 4);
-
-    // Check for names
-    EXPECT_EQ(vmas[0].name, "[anon:dalvik-zygote-jit-code-cache]");
-    EXPECT_EQ(vmas[1].name, "/system/framework/x86_64/boot-framework.art");
-    EXPECT_TRUE(vmas[2].name == "[anon:libc_malloc]" ||
-                android::base::StartsWith(vmas[2].name, "[anon:scudo:"))
-            << "Unknown map name " << vmas[2].name;
-    EXPECT_EQ(vmas[3].name, "/system/priv-app/SettingsProvider/oat/x86_64/SettingsProvider.odex");
-    EXPECT_EQ(vmas[4].name, "/system/lib64/libhwui.so");
-    EXPECT_EQ(vmas[5].name, "[vsyscall]");
-
-    EXPECT_EQ(vmas[0].usage.rss, 2048);
-    EXPECT_EQ(vmas[1].usage.rss, 11188);
-    EXPECT_EQ(vmas[2].usage.rss, 15272);
-    EXPECT_EQ(vmas[3].usage.rss, 260);
-    EXPECT_EQ(vmas[4].usage.rss, 4132);
-    EXPECT_EQ(vmas[5].usage.rss, 0);
-
-    EXPECT_EQ(vmas[0].usage.pss, 113);
-    EXPECT_EQ(vmas[1].usage.pss, 2200);
-    EXPECT_EQ(vmas[2].usage.pss, 15272);
-    EXPECT_EQ(vmas[3].usage.pss, 260);
-    EXPECT_EQ(vmas[4].usage.pss, 1274);
-    EXPECT_EQ(vmas[5].usage.pss, 0);
-
-    EXPECT_EQ(vmas[0].usage.uss, 0);
-    EXPECT_EQ(vmas[1].usage.uss, 1660);
-    EXPECT_EQ(vmas[2].usage.uss, 15272);
-    EXPECT_EQ(vmas[3].usage.uss, 260);
-    EXPECT_EQ(vmas[4].usage.uss, 0);
-    EXPECT_EQ(vmas[5].usage.uss, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_clean, 0);
-    EXPECT_EQ(vmas[1].usage.private_clean, 0);
-    EXPECT_EQ(vmas[2].usage.private_clean, 0);
-    EXPECT_EQ(vmas[3].usage.private_clean, 260);
-    EXPECT_EQ(vmas[4].usage.private_clean, 0);
-    EXPECT_EQ(vmas[5].usage.private_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[1].usage.private_dirty, 1660);
-    EXPECT_EQ(vmas[2].usage.private_dirty, 15272);
-    EXPECT_EQ(vmas[3].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.private_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.private_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[1].usage.shared_clean, 80);
-    EXPECT_EQ(vmas[2].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[3].usage.shared_clean, 0);
-    EXPECT_EQ(vmas[4].usage.shared_clean, 4132);
-    EXPECT_EQ(vmas[5].usage.shared_clean, 0);
-
-    EXPECT_EQ(vmas[0].usage.shared_dirty, 2048);
-    EXPECT_EQ(vmas[1].usage.shared_dirty, 9448);
-    EXPECT_EQ(vmas[2].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[3].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[4].usage.shared_dirty, 0);
-    EXPECT_EQ(vmas[5].usage.shared_dirty, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap, 0);
-    EXPECT_EQ(vmas[1].usage.swap, 0);
-    EXPECT_EQ(vmas[2].usage.swap, 0);
-    EXPECT_EQ(vmas[3].usage.swap, 0);
-    EXPECT_EQ(vmas[4].usage.swap, 0);
-    EXPECT_EQ(vmas[5].usage.swap, 0);
-
-    EXPECT_EQ(vmas[0].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[1].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[2].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[3].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[4].usage.swap_pss, 0);
-    EXPECT_EQ(vmas[5].usage.swap_pss, 0);
-}
-
-TEST(SysMemInfo, TestSysMemInfoFile) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:         32768 kB
-SwapFree:           4096 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:       65536 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(meminfo, tf.fd));
-
-    SysMemInfo mi;
-    ASSERT_TRUE(mi.ReadMemInfo(tf.path));
-    EXPECT_EQ(mi.mem_total_kb(), 3019740);
-    EXPECT_EQ(mi.mem_free_kb(), 1809728);
-    EXPECT_EQ(mi.mem_buffers_kb(), 54736);
-    EXPECT_EQ(mi.mem_cached_kb(), 776052);
-    EXPECT_EQ(mi.mem_shmem_kb(), 4020);
-    EXPECT_EQ(mi.mem_slab_kb(), 86464);
-    EXPECT_EQ(mi.mem_slab_reclaimable_kb(), 44432);
-    EXPECT_EQ(mi.mem_slab_unreclaimable_kb(), 42032);
-    EXPECT_EQ(mi.mem_swap_kb(), 32768);
-    EXPECT_EQ(mi.mem_swap_free_kb(), 4096);
-    EXPECT_EQ(mi.mem_mapped_kb(), 62624);
-    EXPECT_EQ(mi.mem_vmalloc_used_kb(), 65536);
-    EXPECT_EQ(mi.mem_page_tables_kb(), 2900);
-    EXPECT_EQ(mi.mem_kernel_stack_kb(), 4880);
-}
-
-TEST(SysMemInfo, TestEmptyFile) {
-    TemporaryFile tf;
-    std::string empty_string = "";
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(empty_string, tf.fd));
-
-    SysMemInfo mi;
-    EXPECT_TRUE(mi.ReadMemInfo(tf.path));
-    EXPECT_EQ(mi.mem_total_kb(), 0);
-}
-
-TEST(SysMemInfo, TestZramTotal) {
-    std::string exec_dir = ::android::base::GetExecutableDirectory();
-
-    SysMemInfo mi;
-    std::string zram_mmstat_dir = exec_dir + "/testdata1/";
-    EXPECT_EQ(mi.mem_zram_kb(zram_mmstat_dir), 30504);
-
-    std::string zram_memused_dir = exec_dir + "/testdata2/";
-    EXPECT_EQ(mi.mem_zram_kb(zram_memused_dir), 30504);
-}
-
-enum {
-    MEMINFO_TOTAL,
-    MEMINFO_FREE,
-    MEMINFO_BUFFERS,
-    MEMINFO_CACHED,
-    MEMINFO_SHMEM,
-    MEMINFO_SLAB,
-    MEMINFO_SLAB_RECLAIMABLE,
-    MEMINFO_SLAB_UNRECLAIMABLE,
-    MEMINFO_SWAP_TOTAL,
-    MEMINFO_SWAP_FREE,
-    MEMINFO_ZRAM_TOTAL,
-    MEMINFO_MAPPED,
-    MEMINFO_VMALLOC_USED,
-    MEMINFO_PAGE_TABLES,
-    MEMINFO_KERNEL_STACK,
-    MEMINFO_COUNT
-};
-
-TEST(SysMemInfo, TestZramWithTags) {
-    std::string meminfo = R"meminfo(MemTotal:        3019740 kB
-MemFree:         1809728 kB
-MemAvailable:    2546560 kB
-Buffers:           54736 kB
-Cached:           776052 kB
-SwapCached:            0 kB
-Active:           445856 kB
-Inactive:         459092 kB
-Active(anon):      78492 kB
-Inactive(anon):     2240 kB
-Active(file):     367364 kB
-Inactive(file):   456852 kB
-Unevictable:        3096 kB
-Mlocked:            3096 kB
-SwapTotal:         32768 kB
-SwapFree:           4096 kB
-Dirty:                32 kB
-Writeback:             0 kB
-AnonPages:         74988 kB
-Mapped:            62624 kB
-Shmem:              4020 kB
-Slab:              86464 kB
-SReclaimable:      44432 kB
-SUnreclaim:        42032 kB
-KernelStack:        4880 kB
-PageTables:         2900 kB
-NFS_Unstable:          0 kB
-Bounce:                0 kB
-WritebackTmp:          0 kB
-CommitLimit:     1509868 kB
-Committed_AS:      80296 kB
-VmallocTotal:   263061440 kB
-VmallocUsed:       65536 kB
-VmallocChunk:          0 kB
-AnonHugePages:      6144 kB
-ShmemHugePages:        0 kB
-ShmemPmdMapped:        0 kB
-CmaTotal:         131072 kB
-CmaFree:          130380 kB
-HugePages_Total:       0
-HugePages_Free:        0
-HugePages_Rsvd:        0
-HugePages_Surp:        0
-Hugepagesize:       2048 kB)meminfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(meminfo, tf.fd));
-    std::string file = std::string(tf.path);
-    std::vector<uint64_t> mem(MEMINFO_COUNT);
-    std::vector<std::string> tags(SysMemInfo::kDefaultSysMemInfoTags);
-    auto it = tags.begin();
-    tags.insert(it + MEMINFO_ZRAM_TOTAL, "Zram:");
-    SysMemInfo mi;
-
-    // Read system memory info
-    EXPECT_TRUE(mi.ReadMemInfo(tags, &mem, file));
-
-    EXPECT_EQ(mem[MEMINFO_TOTAL], 3019740);
-    EXPECT_EQ(mem[MEMINFO_FREE], 1809728);
-    EXPECT_EQ(mem[MEMINFO_BUFFERS], 54736);
-    EXPECT_EQ(mem[MEMINFO_CACHED], 776052);
-    EXPECT_EQ(mem[MEMINFO_SHMEM], 4020);
-    EXPECT_EQ(mem[MEMINFO_SLAB], 86464);
-    EXPECT_EQ(mem[MEMINFO_SLAB_RECLAIMABLE], 44432);
-    EXPECT_EQ(mem[MEMINFO_SLAB_UNRECLAIMABLE], 42032);
-    EXPECT_EQ(mem[MEMINFO_SWAP_TOTAL], 32768);
-    EXPECT_EQ(mem[MEMINFO_SWAP_FREE], 4096);
-    EXPECT_EQ(mem[MEMINFO_MAPPED], 62624);
-    EXPECT_EQ(mem[MEMINFO_VMALLOC_USED], 65536);
-    EXPECT_EQ(mem[MEMINFO_PAGE_TABLES], 2900);
-    EXPECT_EQ(mem[MEMINFO_KERNEL_STACK], 4880);
-}
-
-TEST(SysMemInfo, TestVmallocInfoNoMemory) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   69632 of_iomap+0x78/0xb0 phys=17a00000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=b220000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17c90000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17ca0000 ioremap)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 0);
-}
-
-TEST(SysMemInfo, TestVmallocInfoKernel) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000    8192 drm_property_create_blob+0x44/0xec pages=1 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), getpagesize());
-}
-
-TEST(SysMemInfo, TestVmallocInfoModule) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   28672 pktlog_alloc_buf+0xc4/0x15c [wlan] pages=6 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 6 * getpagesize());
-}
-
-TEST(SysMemInfo, TestVmallocInfoAll) {
-    std::string vmallocinfo =
-            R"vmallocinfo(0x0000000000000000-0x0000000000000000   69632 of_iomap+0x78/0xb0 phys=17a00000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=b220000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17c90000 ioremap
-0x0000000000000000-0x0000000000000000    8192 of_iomap+0x78/0xb0 phys=17ca0000 ioremap
-0x0000000000000000-0x0000000000000000    8192 drm_property_create_blob+0x44/0xec pages=1 vmalloc
-0x0000000000000000-0x0000000000000000   28672 pktlog_alloc_buf+0xc4/0x15c [wlan] pages=6 vmalloc)vmallocinfo";
-
-    TemporaryFile tf;
-    ASSERT_TRUE(tf.fd != -1);
-    ASSERT_TRUE(::android::base::WriteStringToFd(vmallocinfo, tf.fd));
-    std::string file = std::string(tf.path);
-
-    EXPECT_EQ(ReadVmallocInfo(file), 7 * getpagesize());
-}
-
-int main(int argc, char** argv) {
-    ::testing::InitGoogleTest(&argc, argv);
-    ::android::base::InitLogging(argv, android::base::StderrLogger);
-    pid = getpid();
-    return RUN_ALL_TESTS();
-}
diff --git a/libmeminfo/meminfo_private.h b/libmeminfo/meminfo_private.h
deleted file mode 100644
index df5699c..0000000
--- a/libmeminfo/meminfo_private.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <meminfo/meminfo.h>
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-
-// Macros to do per-page flag manipulation
-#define _BITS(x, offset, bits) (((x) >> (offset)) & ((1LL << (bits)) - 1))
-#define PAGE_PRESENT(x) (_BITS(x, 63, 1))
-#define PAGE_SWAPPED(x) (_BITS(x, 62, 1))
-#define PAGE_SHIFT(x) (_BITS(x, 55, 6))
-#define PAGE_PFN(x) (_BITS(x, 0, 55))
-#define PAGE_SWAP_OFFSET(x) (_BITS(x, 5, 50))
-#define PAGE_SWAP_TYPE(x) (_BITS(x, 0, 5))
diff --git a/libmeminfo/pageacct.cpp b/libmeminfo/pageacct.cpp
deleted file mode 100644
index cb17af8..0000000
--- a/libmeminfo/pageacct.cpp
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include <android-base/logging.h>
-#include <android-base/unique_fd.h>
-
-#include "meminfo_private.h"
-
-using unique_fd = ::android::base::unique_fd;
-
-namespace android {
-namespace meminfo {
-
-static inline off64_t pfn_to_idle_bitmap_offset(uint64_t pfn) {
-    return static_cast<off64_t>((pfn >> 6) << 3);
-}
-
-uint64_t pagesize(void) {
-    static uint64_t pagesize = sysconf(_SC_PAGE_SIZE);
-    return pagesize;
-}
-
-bool PageAcct::InitPageAcct(bool pageidle_enable) {
-    if (pageidle_enable && !PageAcct::KernelHasPageIdle()) {
-        LOG(ERROR) << "Idle page tracking is not supported by the kernel";
-        return false;
-    }
-
-    if (kpagecount_fd_ < 0) {
-        unique_fd count_fd(TEMP_FAILURE_RETRY(open("/proc/kpagecount", O_RDONLY | O_CLOEXEC)));
-        if (count_fd < 0) {
-            PLOG(ERROR) << "Failed to open /proc/kpagecount";
-            return false;
-        }
-        kpagecount_fd_ = std::move(count_fd);
-    }
-
-    if (kpageflags_fd_ < 0) {
-        unique_fd flags_fd(TEMP_FAILURE_RETRY(open("/proc/kpageflags", O_RDONLY | O_CLOEXEC)));
-        if (flags_fd < 0) {
-            PLOG(ERROR) << "Failed to open /proc/kpageflags";
-            return false;
-        }
-        kpageflags_fd_ = std::move(flags_fd);
-    }
-
-    if (pageidle_enable && pageidle_fd_ < 0) {
-        unique_fd idle_fd(
-                TEMP_FAILURE_RETRY(open("/sys/kernel/mm/page_idle/bitmap", O_RDWR | O_CLOEXEC)));
-        if (idle_fd < 0) {
-            PLOG(ERROR) << "Failed to open page idle bitmap";
-            return false;
-        }
-        pageidle_fd_ = std::move(idle_fd);
-    }
-
-    return true;
-}
-
-bool PageAcct::PageFlags(uint64_t pfn, uint64_t* flags) {
-    if (!flags) return false;
-
-    if (kpageflags_fd_ < 0) {
-        if (!InitPageAcct()) return false;
-    }
-
-    if (pread64(kpageflags_fd_, flags, sizeof(uint64_t), pfn * sizeof(uint64_t)) !=
-        sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read page flags for page " << pfn;
-        return false;
-    }
-    return true;
-}
-
-bool PageAcct::PageMapCount(uint64_t pfn, uint64_t* mapcount) {
-    if (!mapcount) return false;
-
-    if (kpagecount_fd_ < 0) {
-        if (!InitPageAcct()) return false;
-    }
-
-    if (pread64(kpagecount_fd_, mapcount, sizeof(uint64_t), pfn * sizeof(uint64_t)) !=
-        sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read map count for page " << pfn;
-        return false;
-    }
-    return true;
-}
-
-int PageAcct::IsPageIdle(uint64_t pfn) {
-    if (pageidle_fd_ < 0) {
-        if (!InitPageAcct(true)) return -EOPNOTSUPP;
-    }
-
-    int idle_status = MarkPageIdle(pfn);
-    if (idle_status) return idle_status;
-
-    return GetPageIdle(pfn);
-}
-
-int PageAcct::MarkPageIdle(uint64_t pfn) const {
-    off64_t offset = pfn_to_idle_bitmap_offset(pfn);
-    // set the bit corresponding to page frame
-    uint64_t idle_bits = 1ULL << (pfn % 64);
-
-    if (pwrite64(pageidle_fd_, &idle_bits, sizeof(uint64_t), offset) < 0) {
-        PLOG(ERROR) << "Failed to write page idle bitmap for page " << pfn;
-        return -errno;
-    }
-
-    return 0;
-}
-
-int PageAcct::GetPageIdle(uint64_t pfn) const {
-    off64_t offset = pfn_to_idle_bitmap_offset(pfn);
-    uint64_t idle_bits;
-
-    if (pread64(pageidle_fd_, &idle_bits, sizeof(uint64_t), offset) != sizeof(uint64_t)) {
-        PLOG(ERROR) << "Failed to read page idle bitmap for page " << pfn;
-        return -errno;
-    }
-
-    return !!(idle_bits & (1ULL << (pfn % 64)));
-}
-
-// Public methods
-bool page_present(uint64_t pagemap_val) {
-    return PAGE_PRESENT(pagemap_val);
-}
-
-bool page_swapped(uint64_t pagemap_val) {
-    return PAGE_SWAPPED(pagemap_val);
-}
-
-uint64_t page_pfn(uint64_t pagemap_val) {
-    return PAGE_PFN(pagemap_val);
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/procmeminfo.cpp b/libmeminfo/procmeminfo.cpp
deleted file mode 100644
index 9e9a705..0000000
--- a/libmeminfo/procmeminfo.cpp
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <atomic>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <android-base/unique_fd.h>
-#include <procinfo/process_map.h>
-
-#include "meminfo_private.h"
-
-namespace android {
-namespace meminfo {
-
-static void add_mem_usage(MemUsage* to, const MemUsage& from) {
-    to->vss += from.vss;
-    to->rss += from.rss;
-    to->pss += from.pss;
-    to->uss += from.uss;
-
-    to->swap += from.swap;
-
-    to->private_clean += from.private_clean;
-    to->private_dirty += from.private_dirty;
-
-    to->shared_clean += from.shared_clean;
-    to->shared_dirty += from.shared_dirty;
-}
-
-// Returns true if the line was valid smaps stats line false otherwise.
-static bool parse_smaps_field(const char* line, MemUsage* stats) {
-    char field[64];
-    int len;
-    if (sscanf(line, "%63s %n", field, &len) == 1 && *field && field[strlen(field) - 1] == ':') {
-        const char* c = line + len;
-        switch (field[0]) {
-            case 'P':
-                if (strncmp(field, "Pss:", 4) == 0) {
-                    stats->pss = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Private_Clean:", 14) == 0) {
-                    uint64_t prcl = strtoull(c, nullptr, 10);
-                    stats->private_clean = prcl;
-                    stats->uss += prcl;
-                } else if (strncmp(field, "Private_Dirty:", 14) == 0) {
-                    uint64_t prdi = strtoull(c, nullptr, 10);
-                    stats->private_dirty = prdi;
-                    stats->uss += prdi;
-                }
-                break;
-            case 'S':
-                if (strncmp(field, "Size:", 5) == 0) {
-                    stats->vss = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Shared_Clean:", 13) == 0) {
-                    stats->shared_clean = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Shared_Dirty:", 13) == 0) {
-                    stats->shared_dirty = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "Swap:", 5) == 0) {
-                    stats->swap = strtoull(c, nullptr, 10);
-                } else if (strncmp(field, "SwapPss:", 8) == 0) {
-                    stats->swap_pss = strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'R':
-                if (strncmp(field, "Rss:", 4) == 0) {
-                    stats->rss = strtoull(c, nullptr, 10);
-                }
-                break;
-        }
-        return true;
-    }
-
-    return false;
-}
-
-bool ProcMemInfo::ResetWorkingSet(pid_t pid) {
-    std::string clear_refs_path = ::android::base::StringPrintf("/proc/%d/clear_refs", pid);
-    if (!::android::base::WriteStringToFile("1\n", clear_refs_path)) {
-        PLOG(ERROR) << "Failed to write to " << clear_refs_path;
-        return false;
-    }
-
-    return true;
-}
-
-ProcMemInfo::ProcMemInfo(pid_t pid, bool get_wss, uint64_t pgflags, uint64_t pgflags_mask)
-    : pid_(pid), get_wss_(get_wss), pgflags_(pgflags), pgflags_mask_(pgflags_mask) {}
-
-const std::vector<Vma>& ProcMemInfo::Maps() {
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to read maps for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::MapsWithPageIdle() {
-    if (maps_.empty() && !ReadMaps(get_wss_, true)) {
-        LOG(ERROR) << "Failed to read maps with page idle for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::MapsWithoutUsageStats() {
-    if (maps_.empty() && !ReadMaps(get_wss_, false, false)) {
-        LOG(ERROR) << "Failed to read maps for Process " << pid_;
-    }
-
-    return maps_;
-}
-
-const std::vector<Vma>& ProcMemInfo::Smaps(const std::string& path) {
-    if (!maps_.empty()) {
-        return maps_;
-    }
-
-    auto collect_vmas = [&](const Vma& vma) { maps_.emplace_back(vma); };
-    if (path.empty() && !ForEachVma(collect_vmas)) {
-        LOG(ERROR) << "Failed to read smaps for Process " << pid_;
-        maps_.clear();
-    }
-
-    if (!path.empty() && !ForEachVmaFromFile(path, collect_vmas)) {
-        LOG(ERROR) << "Failed to read smaps from file " << path;
-        maps_.clear();
-    }
-
-    return maps_;
-}
-
-const MemUsage& ProcMemInfo::Usage() {
-    if (get_wss_) {
-        LOG(WARNING) << "Trying to read process memory usage for " << pid_
-                     << " using invalid object";
-        return usage_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get memory usage for Process " << pid_;
-    }
-
-    return usage_;
-}
-
-const MemUsage& ProcMemInfo::Wss() {
-    if (!get_wss_) {
-        LOG(WARNING) << "Trying to read process working set for " << pid_
-                     << " using invalid object";
-        return usage_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get working set for Process " << pid_;
-    }
-
-    return usage_;
-}
-
-bool ProcMemInfo::ForEachVma(const VmaCallback& callback) {
-    std::string path = ::android::base::StringPrintf("/proc/%d/smaps", pid_);
-    return ForEachVmaFromFile(path, callback);
-}
-
-bool ProcMemInfo::SmapsOrRollup(MemUsage* stats) const {
-    std::string path = ::android::base::StringPrintf(
-            "/proc/%d/%s", pid_, IsSmapsRollupSupported(pid_) ? "smaps_rollup" : "smaps");
-    return SmapsOrRollupFromFile(path, stats);
-}
-
-bool ProcMemInfo::SmapsOrRollupPss(uint64_t* pss) const {
-    std::string path = ::android::base::StringPrintf(
-            "/proc/%d/%s", pid_, IsSmapsRollupSupported(pid_) ? "smaps_rollup" : "smaps");
-    return SmapsOrRollupPssFromFile(path, pss);
-}
-
-const std::vector<uint16_t>& ProcMemInfo::SwapOffsets() {
-    if (get_wss_) {
-        LOG(WARNING) << "Trying to read process swap offsets for " << pid_
-                     << " using invalid object";
-        return swap_offsets_;
-    }
-
-    if (maps_.empty() && !ReadMaps(get_wss_)) {
-        LOG(ERROR) << "Failed to get swap offsets for Process " << pid_;
-    }
-
-    return swap_offsets_;
-}
-
-bool ProcMemInfo::PageMap(const Vma& vma, std::vector<uint64_t>* pagemap) {
-    pagemap->clear();
-    std::string pagemap_file = ::android::base::StringPrintf("/proc/%d/pagemap", pid_);
-    ::android::base::unique_fd pagemap_fd(
-            TEMP_FAILURE_RETRY(open(pagemap_file.c_str(), O_RDONLY | O_CLOEXEC)));
-    if (pagemap_fd == -1) {
-        PLOG(ERROR) << "Failed to open " << pagemap_file;
-        return false;
-    }
-
-    uint64_t nr_pages = (vma.end - vma.start) / getpagesize();
-    pagemap->resize(nr_pages);
-
-    size_t bytes_to_read = sizeof(uint64_t) * nr_pages;
-    off64_t start_addr = (vma.start / getpagesize()) * sizeof(uint64_t);
-    ssize_t bytes_read = pread64(pagemap_fd, pagemap->data(), bytes_to_read, start_addr);
-    if (bytes_read == -1) {
-        PLOG(ERROR) << "Failed to read page frames from page map for pid: " << pid_;
-        return false;
-    } else if (static_cast<size_t>(bytes_read) != bytes_to_read) {
-        LOG(ERROR) << "Failed to read page frames from page map for pid: " << pid_
-                   << ": read bytes " << bytes_read << " expected bytes " << bytes_to_read;
-        return false;
-    }
-
-    return true;
-}
-
-static int GetPagemapFd(pid_t pid) {
-    std::string pagemap_file = ::android::base::StringPrintf("/proc/%d/pagemap", pid);
-    int fd = TEMP_FAILURE_RETRY(open(pagemap_file.c_str(), O_RDONLY | O_CLOEXEC));
-    if (fd == -1) {
-        PLOG(ERROR) << "Failed to open " << pagemap_file;
-    }
-    return fd;
-}
-
-bool ProcMemInfo::ReadMaps(bool get_wss, bool use_pageidle, bool get_usage_stats) {
-    // Each object reads /proc/<pid>/maps only once. This is done to make sure programs that are
-    // running for the lifetime of the system can recycle the objects and don't have to
-    // unnecessarily retain and update this object in memory (which can get significantly large).
-    // E.g. A program that only needs to reset the working set will never all ->Maps(), ->Usage().
-    // E.g. A program that is monitoring smaps_rollup, may never call ->maps(), Usage(), so it
-    // doesn't make sense for us to parse and retain unnecessary memory accounting stats by default.
-    if (!maps_.empty()) return true;
-
-    // parse and read /proc/<pid>/maps
-    std::string maps_file = ::android::base::StringPrintf("/proc/%d/maps", pid_);
-    if (!::android::procinfo::ReadMapFile(
-                maps_file, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t,
-                               const char* name) {
-                    maps_.emplace_back(Vma(start, end, pgoff, flags, name));
-                })) {
-        LOG(ERROR) << "Failed to parse " << maps_file;
-        maps_.clear();
-        return false;
-    }
-
-    if (!get_usage_stats) {
-        return true;
-    }
-
-    ::android::base::unique_fd pagemap_fd(GetPagemapFd(pid_));
-    if (pagemap_fd == -1) {
-        return false;
-    }
-
-    for (auto& vma : maps_) {
-        if (!ReadVmaStats(pagemap_fd.get(), vma, get_wss, use_pageidle)) {
-            LOG(ERROR) << "Failed to read page map for vma " << vma.name << "[" << vma.start << "-"
-                       << vma.end << "]";
-            maps_.clear();
-            return false;
-        }
-        add_mem_usage(&usage_, vma.usage);
-    }
-
-    return true;
-}
-
-bool ProcMemInfo::FillInVmaStats(Vma& vma) {
-    ::android::base::unique_fd pagemap_fd(GetPagemapFd(pid_));
-    if (pagemap_fd == -1) {
-        return false;
-    }
-
-    if (!ReadVmaStats(pagemap_fd.get(), vma, get_wss_, false)) {
-        LOG(ERROR) << "Failed to read page map for vma " << vma.name << "[" << vma.start << "-"
-                   << vma.end << "]";
-        return false;
-    }
-    return true;
-}
-
-bool ProcMemInfo::ReadVmaStats(int pagemap_fd, Vma& vma, bool get_wss, bool use_pageidle) {
-    PageAcct& pinfo = PageAcct::Instance();
-    if (get_wss && use_pageidle && !pinfo.InitPageAcct(true)) {
-        LOG(ERROR) << "Failed to init idle page accounting";
-        return false;
-    }
-
-    uint64_t pagesz = getpagesize();
-    size_t num_pages = (vma.end - vma.start) / pagesz;
-    size_t first_page = vma.start / pagesz;
-
-    std::vector<uint64_t> page_cache;
-    size_t cur_page_cache_index = 0;
-    size_t num_in_page_cache = 0;
-    size_t num_leftover_pages = num_pages;
-    for (size_t cur_page = first_page; cur_page < first_page + num_pages; ++cur_page) {
-        if (!get_wss) {
-            vma.usage.vss += pagesz;
-        }
-
-        // Cache page map data.
-        if (cur_page_cache_index == num_in_page_cache) {
-            static constexpr size_t kMaxPages = 2048;
-            num_leftover_pages -= num_in_page_cache;
-            if (num_leftover_pages > kMaxPages) {
-                num_in_page_cache = kMaxPages;
-            } else {
-                num_in_page_cache = num_leftover_pages;
-            }
-            page_cache.resize(num_in_page_cache);
-            size_t total_bytes = page_cache.size() * sizeof(uint64_t);
-            ssize_t bytes = pread64(pagemap_fd, page_cache.data(), total_bytes,
-                                    cur_page * sizeof(uint64_t));
-            if (bytes != total_bytes) {
-                if (bytes == -1) {
-                    PLOG(ERROR) << "Failed to read page data at offset 0x" << std::hex
-                                << cur_page * sizeof(uint64_t);
-                } else {
-                    LOG(ERROR) << "Failed to read page data at offset 0x" << std::hex
-                               << cur_page * sizeof(uint64_t) << std::dec << " read bytes " << bytes
-                               << " expected bytes " << total_bytes;
-                }
-                return false;
-            }
-            cur_page_cache_index = 0;
-        }
-
-        uint64_t page_info = page_cache[cur_page_cache_index++];
-        if (!PAGE_PRESENT(page_info) && !PAGE_SWAPPED(page_info)) continue;
-
-        if (PAGE_SWAPPED(page_info)) {
-            vma.usage.swap += pagesz;
-            swap_offsets_.emplace_back(PAGE_SWAP_OFFSET(page_info));
-            continue;
-        }
-
-        uint64_t page_frame = PAGE_PFN(page_info);
-        uint64_t cur_page_flags;
-        if (!pinfo.PageFlags(page_frame, &cur_page_flags)) {
-            LOG(ERROR) << "Failed to get page flags for " << page_frame << " in process " << pid_;
-            swap_offsets_.clear();
-            return false;
-        }
-
-        // skip unwanted pages from the count
-        if ((cur_page_flags & pgflags_mask_) != pgflags_) continue;
-
-        uint64_t cur_page_counts;
-        if (!pinfo.PageMapCount(page_frame, &cur_page_counts)) {
-            LOG(ERROR) << "Failed to get page count for " << page_frame << " in process " << pid_;
-            swap_offsets_.clear();
-            return false;
-        }
-
-        // Page was unmapped between the presence check at the beginning of the loop and here.
-        if (cur_page_counts == 0) {
-            continue;
-        }
-
-        bool is_dirty = !!(cur_page_flags & (1 << KPF_DIRTY));
-        bool is_private = (cur_page_counts == 1);
-        // Working set
-        if (get_wss) {
-            bool is_referenced = use_pageidle ? (pinfo.IsPageIdle(page_frame) == 1)
-                                              : !!(cur_page_flags & (1 << KPF_REFERENCED));
-            if (!is_referenced) {
-                continue;
-            }
-            // This effectively makes vss = rss for the working set is requested.
-            // The libpagemap implementation returns vss > rss for
-            // working set, which doesn't make sense.
-            vma.usage.vss += pagesz;
-        }
-
-        vma.usage.rss += pagesz;
-        vma.usage.uss += is_private ? pagesz : 0;
-        vma.usage.pss += pagesz / cur_page_counts;
-        if (is_private) {
-            vma.usage.private_dirty += is_dirty ? pagesz : 0;
-            vma.usage.private_clean += is_dirty ? 0 : pagesz;
-        } else {
-            vma.usage.shared_dirty += is_dirty ? pagesz : 0;
-            vma.usage.shared_clean += is_dirty ? 0 : pagesz;
-        }
-    }
-    return true;
-}
-
-// Public APIs
-bool ForEachVmaFromFile(const std::string& path, const VmaCallback& callback) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-
-    char* line = nullptr;
-    bool parsing_vma = false;
-    ssize_t line_len;
-    size_t line_alloc = 0;
-    Vma vma;
-    while ((line_len = getline(&line, &line_alloc, fp.get())) > 0) {
-        // Make sure the line buffer terminates like a C string for ReadMapFile
-        line[line_len] = '\0';
-
-        if (parsing_vma) {
-            if (parse_smaps_field(line, &vma.usage)) {
-                // This was a stats field
-                continue;
-            }
-
-            // Done collecting stats, make the call back
-            callback(vma);
-            parsing_vma = false;
-        }
-
-        vma.clear();
-        // If it has, we are looking for the vma stats
-        // 00400000-00409000 r-xp 00000000 fc:00 426998  /usr/lib/gvfs/gvfsd-http
-        if (!::android::procinfo::ReadMapFileContent(
-                    line, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t,
-                              const char* name) {
-                        vma.start = start;
-                        vma.end = end;
-                        vma.flags = flags;
-                        vma.offset = pgoff;
-                        vma.name = name;
-                    })) {
-            LOG(ERROR) << "Failed to parse " << path;
-            return false;
-        }
-        parsing_vma = true;
-    }
-
-    // free getline() managed buffer
-    free(line);
-
-    if (parsing_vma) {
-        callback(vma);
-    }
-
-    return true;
-}
-
-enum smaps_rollup_support { UNTRIED, SUPPORTED, UNSUPPORTED };
-
-static std::atomic<smaps_rollup_support> g_rollup_support = UNTRIED;
-
-bool IsSmapsRollupSupported(pid_t pid) {
-    // Similar to OpenSmapsOrRollup checks from android_os_Debug.cpp, except
-    // the method only checks if rollup is supported and returns the status
-    // right away.
-    enum smaps_rollup_support rollup_support = g_rollup_support.load(std::memory_order_relaxed);
-    if (rollup_support != UNTRIED) {
-        return rollup_support == SUPPORTED;
-    }
-    std::string rollup_file = ::android::base::StringPrintf("/proc/%d/smaps_rollup", pid);
-    if (access(rollup_file.c_str(), F_OK | R_OK)) {
-        // No check for errno = ENOENT necessary here. The caller MUST fallback to
-        // using /proc/<pid>/smaps instead anyway.
-        g_rollup_support.store(UNSUPPORTED, std::memory_order_relaxed);
-        return false;
-    }
-
-    g_rollup_support.store(SUPPORTED, std::memory_order_relaxed);
-    LOG(INFO) << "Using smaps_rollup for pss collection";
-    return true;
-}
-
-bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    stats->clear();
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        switch (line[0]) {
-            case 'P':
-                if (strncmp(line, "Pss:", 4) == 0) {
-                    char* c = line + 4;
-                    stats->pss += strtoull(c, nullptr, 10);
-                } else if (strncmp(line, "Private_Clean:", 14) == 0) {
-                    char* c = line + 14;
-                    uint64_t prcl = strtoull(c, nullptr, 10);
-                    stats->private_clean += prcl;
-                    stats->uss += prcl;
-                } else if (strncmp(line, "Private_Dirty:", 14) == 0) {
-                    char* c = line + 14;
-                    uint64_t prdi = strtoull(c, nullptr, 10);
-                    stats->private_dirty += prdi;
-                    stats->uss += prdi;
-                }
-                break;
-            case 'R':
-                if (strncmp(line, "Rss:", 4) == 0) {
-                    char* c = line + 4;
-                    stats->rss += strtoull(c, nullptr, 10);
-                }
-                break;
-            case 'S':
-                if (strncmp(line, "SwapPss:", 8) == 0) {
-                    char* c = line + 8;
-                    stats->swap_pss += strtoull(c, nullptr, 10);
-                }
-                break;
-        }
-    }
-
-    // free getline() managed buffer
-    free(line);
-    return true;
-}
-
-bool SmapsOrRollupPssFromFile(const std::string& path, uint64_t* pss) {
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return false;
-    }
-    *pss = 0;
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        uint64_t v;
-        if (sscanf(line, "Pss: %" SCNu64 " kB", &v) == 1) {
-            *pss += v;
-        }
-    }
-
-    // free getline() managed buffer
-    free(line);
-    return true;
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/sysmeminfo.cpp b/libmeminfo/sysmeminfo.cpp
deleted file mode 100644
index 5cfa6c3..0000000
--- a/libmeminfo/sysmeminfo.cpp
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <ctype.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <cctype>
-#include <cstdio>
-#include <fstream>
-#include <iterator>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <android-base/unique_fd.h>
-
-#include "meminfo_private.h"
-
-namespace android {
-namespace meminfo {
-
-const std::vector<std::string> SysMemInfo::kDefaultSysMemInfoTags = {
-        SysMemInfo::kMemTotal,      SysMemInfo::kMemFree,        SysMemInfo::kMemBuffers,
-        SysMemInfo::kMemCached,     SysMemInfo::kMemShmem,       SysMemInfo::kMemSlab,
-        SysMemInfo::kMemSReclaim,   SysMemInfo::kMemSUnreclaim,  SysMemInfo::kMemSwapTotal,
-        SysMemInfo::kMemSwapFree,   SysMemInfo::kMemMapped,      SysMemInfo::kMemVmallocUsed,
-        SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack,
-};
-
-bool SysMemInfo::ReadMemInfo(const std::string& path) {
-    return ReadMemInfo(SysMemInfo::kDefaultSysMemInfoTags, path,
-                       [&](const std::string& tag, uint64_t val) { mem_in_kb_[tag] = val; });
-}
-
-bool SysMemInfo::ReadMemInfo(std::vector<uint64_t>* out, const std::string& path) {
-    return ReadMemInfo(SysMemInfo::kDefaultSysMemInfoTags, out, path);
-}
-
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, std::vector<uint64_t>* out,
-                             const std::string& path) {
-    out->clear();
-    out->resize(tags.size());
-
-    return ReadMemInfo(tags, path, [&]([[maybe_unused]] const std::string& tag, uint64_t val) {
-        auto it = std::find(tags.begin(), tags.end(), tag);
-        if (it == tags.end()) {
-            LOG(ERROR) << "Tried to store invalid tag: " << tag;
-            return;
-        }
-        auto index = std::distance(tags.begin(), it);
-        // store the values in the same order as the tags
-        out->at(index) = val;
-    });
-}
-
-uint64_t SysMemInfo::ReadVmallocInfo() {
-    return ::android::meminfo::ReadVmallocInfo();
-}
-
-// TODO: Delete this function if it can't match up with the c-like implementation below.
-// Currently, this added about 50 % extra overhead on hikey.
-#if 0
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, const std::string& path) {
-    std::string buffer;
-    if (!::android::base::ReadFileToString(path, &buffer)) {
-        PLOG(ERROR) << "Failed to read : " << path;
-        return false;
-    }
-
-    uint32_t total_found = 0;
-    for (auto s = buffer.begin(); s < buffer.end() && total_found < tags.size();) {
-        for (auto& tag : tags) {
-            if (tag == std::string(s, s + tag.size())) {
-                s += tag.size();
-                while (isspace(*s)) s++;
-                auto num_start = s;
-                while (std::isdigit(*s)) s++;
-
-                std::string number(num_start, num_start + (s - num_start));
-                if (!::android::base::ParseUint(number, &mem_in_kb_[tag])) {
-                    LOG(ERROR) << "Failed to parse uint";
-                    return false;
-                }
-                total_found++;
-                break;
-            }
-        }
-        while (s < buffer.end() && *s != '\n') s++;
-        if (s < buffer.end()) s++;
-    }
-
-    return true;
-}
-
-#else
-bool SysMemInfo::ReadMemInfo(const std::vector<std::string>& tags, const std::string& path,
-                             std::function<void(const std::string&, uint64_t)> store_val) {
-    char buffer[4096];
-    int fd = open(path.c_str(), O_RDONLY | O_CLOEXEC);
-    if (fd < 0) {
-        PLOG(ERROR) << "Failed to open file :" << path;
-        return false;
-    }
-
-    const int len = read(fd, buffer, sizeof(buffer) - 1);
-    close(fd);
-    if (len < 0) {
-        return false;
-    }
-
-    buffer[len] = '\0';
-    char* p = buffer;
-    uint32_t found = 0;
-    uint32_t lineno = 0;
-    bool zram_tag_found = false;
-    while (*p && found < tags.size()) {
-        for (auto& tag : tags) {
-            // Special case for "Zram:" tag that android_os_Debug and friends look
-            // up along with the rest of the numbers from /proc/meminfo
-            if (!zram_tag_found && tag == "Zram:") {
-                store_val(tag, mem_zram_kb());
-                zram_tag_found = true;
-                found++;
-                continue;
-            }
-
-            if (strncmp(p, tag.c_str(), tag.size()) == 0) {
-                p += tag.size();
-                while (*p == ' ') p++;
-                char* endptr = nullptr;
-                uint64_t val = strtoull(p, &endptr, 10);
-                if (p == endptr) {
-                    PLOG(ERROR) << "Failed to parse line:" << lineno + 1 << " in file: " << path;
-                    return false;
-                }
-                store_val(tag, val);
-                p = endptr;
-                found++;
-                break;
-            }
-        }
-
-        while (*p && *p != '\n') {
-            p++;
-        }
-        if (*p) p++;
-        lineno++;
-    }
-
-    return true;
-}
-#endif
-
-uint64_t SysMemInfo::mem_zram_kb(const std::string& zram_dev) {
-    uint64_t mem_zram_total = 0;
-    if (!zram_dev.empty()) {
-        if (!MemZramDevice(zram_dev, &mem_zram_total)) {
-            return 0;
-        }
-        return mem_zram_total / 1024;
-    }
-
-    constexpr uint32_t kMaxZramDevices = 256;
-    for (uint32_t i = 0; i < kMaxZramDevices; i++) {
-        std::string zram_dev = ::android::base::StringPrintf("/sys/block/zram%u/", i);
-        if (access(zram_dev.c_str(), F_OK)) {
-            // We assume zram devices appear in range 0-255 and appear always in sequence
-            // under /sys/block. So, stop looking for them once we find one is missing.
-            break;
-        }
-
-        uint64_t mem_zram_dev;
-        if (!MemZramDevice(zram_dev, &mem_zram_dev)) {
-            return 0;
-        }
-
-        mem_zram_total += mem_zram_dev;
-    }
-
-    return mem_zram_total / 1024;
-}
-
-bool SysMemInfo::MemZramDevice(const std::string& zram_dev, uint64_t* mem_zram_dev) {
-    std::string mmstat = ::android::base::StringPrintf("%s/%s", zram_dev.c_str(), "mm_stat");
-    auto mmstat_fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(mmstat.c_str(), "re"), fclose};
-    if (mmstat_fp != nullptr) {
-        // only if we do have mmstat, use it. Otherwise, fall through to trying out the old
-        // 'mem_used_total'
-        if (fscanf(mmstat_fp.get(), "%*" SCNu64 " %*" SCNu64 " %" SCNu64, mem_zram_dev) != 1) {
-            PLOG(ERROR) << "Malformed mm_stat file in: " << zram_dev;
-            return false;
-        }
-        return true;
-    }
-
-    std::string content;
-    if (::android::base::ReadFileToString(zram_dev + "mem_used_total", &content)) {
-        *mem_zram_dev = strtoull(content.c_str(), NULL, 10);
-        if (*mem_zram_dev == ULLONG_MAX) {
-            PLOG(ERROR) << "Malformed mem_used_total file for zram dev: " << zram_dev
-                        << " content: " << content;
-            return false;
-        }
-
-        return true;
-    }
-
-    LOG(ERROR) << "Can't find memory status under: " << zram_dev;
-    return false;
-}
-
-// Public methods
-uint64_t ReadVmallocInfo(const std::string& path) {
-    uint64_t vmalloc_total = 0;
-    auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(path.c_str(), "re"), fclose};
-    if (fp == nullptr) {
-        return vmalloc_total;
-    }
-
-    char* line = nullptr;
-    size_t line_alloc = 0;
-    while (getline(&line, &line_alloc, fp.get()) > 0) {
-        // We are looking for lines like
-        //
-        // 0x0000000000000000-0x0000000000000000   12288 drm_property_create_blob+0x44/0xec pages=2 vmalloc
-        // 0x0000000000000000-0x0000000000000000    8192 wlan_logging_sock_init_svc+0xf8/0x4f0 [wlan] pages=1 vmalloc
-        //
-        // Notice that if the caller is coming from a module, the kernel prints and extra
-        // "[module_name]" after the address and the symbol of the call site. This means we can't
-        // use the old sscanf() method of getting the # of pages.
-        char* p_start = strstr(line, "pages=");
-        if (p_start == nullptr) {
-            // we didn't find anything
-            continue;
-        }
-
-        uint64_t nr_pages;
-        if (sscanf(p_start, "pages=%" SCNu64 "", &nr_pages) == 1) {
-            vmalloc_total += (nr_pages * getpagesize());
-        }
-    }
-
-    free(line);
-
-    return vmalloc_total;
-}
-
-}  // namespace meminfo
-}  // namespace android
diff --git a/libmeminfo/testdata1/mm_stat b/libmeminfo/testdata1/mm_stat
deleted file mode 100644
index 32b325f..0000000
--- a/libmeminfo/testdata1/mm_stat
+++ /dev/null
@@ -1 +0,0 @@
- 145674240 26801454 31236096        0 45772800     3042     1887      517
diff --git a/libmeminfo/testdata1/showmap_test.sh b/libmeminfo/testdata1/showmap_test.sh
deleted file mode 100755
index 8ee713e..0000000
--- a/libmeminfo/testdata1/showmap_test.sh
+++ /dev/null
@@ -1,86 +0,0 @@
-#! /system/bin/sh
-
-TESTDATA_PATH=/data/nativetest64/libmeminfo_test/testdata1
-SMAPS=$TESTDATA_PATH/smaps
-OUT1=$TMPDIR/1.txt
-OUT2=$TMPDIR/2.txt
-
-showmap -f $SMAPS > $OUT1
-showmap2 -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -f <smaps>";
-else
-    echo "pass: showmap -f <smaps>"
-fi
-
-showmap -q -f $SMAPS > $OUT1
-showmap2 -q -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -q -f <smaps>";
-else
-    echo "pass: showmap -q -f <smaps>"
-fi
-
-showmap -v -f $SMAPS > $OUT1
-showmap2 -v -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -v -f <smaps>";
-else
-    echo "pass: showmap -v -f <smaps>"
-fi
-
-showmap -a -f $SMAPS > $OUT1
-showmap2 -a -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -f <smaps>";
-else
-    echo "pass: showmap -a -f <smaps>"
-fi
-
-# Note that all tests from here down that have the option
-# '-a' added to the command are expected to fail as
-# 'showmap2' actually fixes the 64-bit address truncating
-# that was already happening with showmap
-showmap -a -t -f $SMAPS > $OUT1
-showmap2 -a -t -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -t -f <smaps>";
-else
-    echo "pass: showmap -a -t -f <smaps>"
-fi
-
-showmap -a -t -v -f $SMAPS > $OUT1
-showmap2 -a -t -v -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -a -t -v -f <smaps>";
-else
-    echo "pass: showmap -a -t -v -f <smaps>"
-fi
-
-# Note: This test again is expected to fail as the new
-# showmap fixes an issue with -t where the tool was only
-# showing maps with private dirty pages. The '-t' option was however
-# supposed to show all maps that have 'private' pages, clean or dirty.
-showmap -t -f $SMAPS > $OUT1
-showmap2 -t -f $SMAPS > $OUT2
-diff $OUT1 $OUT2 > /dev/null
-ret=$?
-if [[ $ret != 0 ]]; then
-    echo "fail: showmap -t -f <smaps>";
-else
-    echo "pass: showmap -t -f <smaps>"
-fi
-
-
diff --git a/libmeminfo/testdata1/smaps b/libmeminfo/testdata1/smaps
deleted file mode 100644
index 23aa2af..0000000
--- a/libmeminfo/testdata1/smaps
+++ /dev/null
@@ -1,56297 +0,0 @@
-12c00000-13440000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               8448 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                2652 kB
-Pss:                2652 kB
-Shared_Clean:          0 kB
-Shared_Dirty:          0 kB
-Private_Clean:         0 kB
-Private_Dirty:      2652 kB
-Referenced:         2652 kB
-Anonymous:          2652 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                  0 kB
-SwapPss:               0 kB
-Locked:             2652 kB
-VmFlags: rd wr mr mw me ac 
-13440000-13500000 ---p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:                768 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                   0 kB
-Pss:                   0 kB
-Shared_Clean:          0 kB
-Shared_Dirty:          0 kB
-Private_Clean:         0 kB
-Private_Dirty:         0 kB
-Referenced:            0 kB
-Anonymous:             0 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                  0 kB
-SwapPss:               0 kB
-Locked:                0 kB
-VmFlags: mr mw me ac 
-13500000-13540000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:                256 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                 256 kB
-Pss:                 256 kB
-Shared_Clean:          0 kB
-Shared_Dirty:          0 kB
-Private_Clean:         0 kB
-Private_Dirty:       256 kB
-Referenced:          256 kB
-Anonymous:           256 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                  0 kB
-SwapPss:               0 kB
-Locked:              256 kB
-VmFlags: rd wr mr mw me ac 
-13540000-137c0000 ---p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:               2560 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                   0 kB
-Pss:                   0 kB
-Shared_Clean:          0 kB
-Shared_Dirty:          0 kB
-Private_Clean:         0 kB
-Private_Dirty:         0 kB
-Referenced:            0 kB
-Anonymous:             0 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                  0 kB
-SwapPss:               0 kB
-Locked:                0 kB
-VmFlags: mr mw me ac 
-137c0000-13880000 rw-p 00000000 00:00 0                                  [anon:dalvik-main space (region space)]
-Name:           [anon:dalvik-main space (region space)]
-Size:                768 kB
-KernelPageSize:        4 kB
-MMUPageSize:           4 kB
-Rss:                 740 kB
-Pss:                 740 kB
-Shared_Clean:          0 kB
-Shared_Dirty:          0 kB
-Private_Clean:         0 kB
-Private_Dirty:       740 kB
-Referenced:          740 kB
-Anonymous:           740 kB
-AnonHugePages:         0 kB
-ShmemPmdMapped:        0 kB
-Shared_Hugetlb:        0 kB
-Private_Hugetlb:       0 kB
-Swap:                  0 kB
-SwapPss:               0 kB
-Locked:              740 kB
-VmFlags: rd wr mr mw me ac 
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diff --git a/libmeminfo/testdata1/smaps_short b/libmeminfo/testdata1/smaps_short
deleted file mode 100644
index cee67b3..0000000
--- a/libmeminfo/testdata1/smaps_short
+++ /dev/null
@@ -1,122 +0,0 @@
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--- a/libmeminfo/testdata1/vmallocinfo
+++ /dev/null
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-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 3141632 ion_heap_map_kernel+0x108/0x158 vmap
-0x0000000000000000-0x0000000000000000 533729280 devm_ioremap+0x84/0xd8 phys=40300000 ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
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-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
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-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
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-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
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-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 1044480 binder_alloc_mmap_handler+0x60/0x1cc ioremap
-0x0000000000000000-0x0000000000000000 10498048 pktlog_alloc_buf+0xc4/0x15c [wlan] pages=2562 vmalloc vpages
-0x0000000000000000-0x0000000000000000 18350080 setup_arch+0x20c/0x668 phys=80080000 vmap
-0x0000000000000000-0x0000000000000000 8388608 setup_arch+0x20c/0x668 phys=81200000 vmap
-0x0000000000000000-0x0000000000000000 6291456 setup_arch+0x20c/0x668 phys=81a00000 vmap
-0x0000000000000000-0x0000000000000000 11005952 setup_arch+0x20c/0x668 phys=82000000 vmap
-0x0000000000000000-0x0000000000000000 8073216 load_module+0x24ac/0x3408 pages=1970 vmalloc vpages
-0x0000000000000000-0x0000000000000000   20480 load_module+0x24ac/0x3408 pages=4 vmalloc
-0x0000000000000000-0x0000000000000000  151552 load_module+0x24ac/0x3408 pages=36 vmalloc
-0x0000000000000000-0x0000000000000000   28672 load_module+0x24ac/0x3408 pages=6 vmalloc
-0x0000000000000000-0x0000000000000000   94208 load_module+0x24ac/0x3408 pages=22 vmalloc
-0x0000000000000000-0x0000000000000000  409600 load_module+0x24ac/0x3408 pages=99 vmalloc
-0x0000000000000000-0x0000000000000000   36864 load_module+0x24ac/0x3408 pages=8 vmalloc
-0x0000000000000000-0x0000000000000000  303104 load_module+0x24ac/0x3408 pages=73 vmalloc
-0x0000000000000000-0x0000000000000000  172032 load_module+0x24ac/0x3408 pages=41 vmalloc
-0x0000000000000000-0x0000000000000000   20480 load_module+0x24ac/0x3408 pages=4 vmalloc
-0x0000000000000000-0x0000000000000000   20480 load_module+0x24ac/0x3408 pages=4 vmalloc
-0x0000000000000000-0x0000000000000000   20480 load_module+0x24ac/0x3408 pages=4 vmalloc
-0x0000000000000000-0x0000000000000000  245760 load_module+0x24ac/0x3408 pages=59 vmalloc
-0x0000000000000000-0x0000000000000000  786432 pcpu_get_vm_areas+0x0/0x800 vmalloc
-0x0000000000000000-0x0000000000000000  786432 pcpu_get_vm_areas+0x0/0x800 vmalloc
diff --git a/libmeminfo/testdata2/mem_used_total b/libmeminfo/testdata2/mem_used_total
deleted file mode 100644
index 97fcf41..0000000
--- a/libmeminfo/testdata2/mem_used_total
+++ /dev/null
@@ -1 +0,0 @@
-31236096
diff --git a/libmeminfo/tools/Android.bp b/libmeminfo/tools/Android.bp
deleted file mode 100644
index 3968c09..0000000
--- a/libmeminfo/tools/Android.bp
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_binary {
-    name: "librank",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["librank.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "procmem",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["procmem.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "procrank",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["procrank.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-}
-
-cc_binary {
-    name: "showmap",
-    host_supported: true,
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-
-    srcs: ["showmap.cpp"],
-    shared_libs: [
-        "libbase",
-        "libmeminfo",
-    ],
-
-    target: {
-        darwin: {
-            enabled: false,
-        },
-    },
-}
-
-cc_binary {
-    name: "wsstop",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-    srcs: ["wsstop.cpp"],
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libmeminfo",
-    ],
-}
diff --git a/libmeminfo/tools/librank.cpp b/libmeminfo/tools/librank.cpp
deleted file mode 100644
index e53c746..0000000
--- a/libmeminfo/tools/librank.cpp
+++ /dev/null
@@ -1,351 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <dirent.h>
-#include <errno.h>
-#include <error.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <map>
-#include <memory>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::Vma;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [ -P | -L ] [ -v | -r | -p | -u | -s | -h ]\n"
-            "\n"
-            "Sort options:\n"
-            "    -v  Sort processes by VSS.\n"
-            "    -r  Sort processes by RSS.\n"
-            "    -p  Sort processes by PSS.\n"
-            "    -u  Sort processes by USS.\n"
-            "    -s  Sort processes by swap.\n"
-            "        (Default sort order is PSS.)\n"
-            "    -a  Show all mappings, including stack, heap and anon.\n"
-            "    -P /path  Limit libraries displayed to those in path.\n"
-            "    -R  Reverse sort order (default is descending).\n"
-            "    -m [r][w][x] Only list pages that exactly match permissions\n"
-            "    -c  Only show cached (storage backed) pages\n"
-            "    -C  Only show non-cached (ram/swap backed) pages\n"
-            "    -k  Only show pages collapsed by KSM\n"
-            "    -h  Display this help screen.\n",
-            getprogname());
-    exit(exit_status);
-}
-
-static void add_mem_usage(MemUsage* to, const MemUsage& from) {
-    to->vss += from.vss;
-    to->rss += from.rss;
-    to->pss += from.pss;
-    to->uss += from.uss;
-
-    to->swap += from.swap;
-
-    to->private_clean += from.private_clean;
-    to->private_dirty += from.private_dirty;
-
-    to->shared_clean += from.shared_clean;
-    to->shared_dirty += from.shared_dirty;
-}
-
-struct ProcessRecord {
-  public:
-    ProcessRecord(pid_t pid) : pid_(-1), cmdline_("") {
-        std::string fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-        std::string cmdline;
-        if (!::android::base::ReadFileToString(fname, &cmdline)) {
-            fprintf(stderr, "Failed to read cmdline from: %s\n", fname.c_str());
-            return;
-        }
-        // We deliberately don't read the proc/<pid>cmdline file directly into 'cmdline_'
-        // because of some processes showing up cmdlines that end with "0x00 0x0A 0x00"
-        // e.g. xtra-daemon, lowi-server
-        // The .c_str() assignment below then takes care of trimming the cmdline at the first
-        // 0x00. This is how original procrank worked (luckily)
-        cmdline_ = cmdline.c_str();
-        pid_ = pid;
-        usage_.clear();
-    }
-
-    ~ProcessRecord() = default;
-
-    bool valid() const { return pid_ != -1; }
-
-    // Getters
-    pid_t pid() const { return pid_; }
-    const std::string& cmdline() const { return cmdline_; }
-    const MemUsage& usage() const { return usage_; }
-
-    // Add to the usage
-    void AddUsage(const MemUsage& mem_usage) { add_mem_usage(&usage_, mem_usage); }
-
-  private:
-    pid_t pid_;
-    std::string cmdline_;
-    MemUsage usage_;
-};
-
-struct LibRecord {
-  public:
-    LibRecord(const std::string& name) : name_(name) {}
-    ~LibRecord() = default;
-
-    const std::string& name() const { return name_; }
-    const MemUsage& usage() const { return usage_; }
-    const std::map<pid_t, ProcessRecord>& processes() const { return procs_; }
-    uint64_t pss() const { return usage_.pss; }
-    void AddUsage(const ProcessRecord& proc, const MemUsage& mem_usage) {
-        auto [it, inserted] = procs_.insert(std::pair<pid_t, ProcessRecord>(proc.pid(), proc));
-        it->second.AddUsage(mem_usage);
-        add_mem_usage(&usage_, mem_usage);
-    }
-
-  private:
-    std::string name_;
-    MemUsage usage_;
-    std::map<pid_t, ProcessRecord> procs_;
-};
-
-// List of every library / map
-static std::map<std::string, LibRecord> g_libs;
-
-// List of library/map names that we don't want to show by default
-static const std::vector<std::string> g_blacklisted_libs = {"[heap]", "[stack]"};
-
-// Global flags affected by command line
-static uint64_t g_pgflags = 0;
-static uint64_t g_pgflags_mask = 0;
-static uint16_t g_mapflags_mask = 0;
-static bool g_all_libs = false;
-static bool g_has_swap = false;
-static bool g_reverse_sort = false;
-static std::string g_prefix_filter = "";
-
-static bool read_all_pids(std::function<bool(pid_t pid)> for_each_pid) {
-    std::unique_ptr<DIR, int (*)(DIR*)> procdir(opendir("/proc"), closedir);
-    if (!procdir) return false;
-
-    struct dirent* dir;
-    pid_t pid;
-    while ((dir = readdir(procdir.get()))) {
-        if (!::android::base::ParseInt(dir->d_name, &pid)) continue;
-        if (!for_each_pid(pid)) return false;
-    }
-
-    return true;
-}
-
-static bool scan_libs_per_process(pid_t pid) {
-    ProcMemInfo pmem(pid, false, g_pgflags, g_pgflags_mask);
-    const std::vector<Vma> maps = pmem.Maps();
-    if (maps.size() == 0) {
-        // nothing to do here, continue
-        return true;
-    }
-
-    ProcessRecord proc(pid);
-    if (!proc.valid()) {
-        fprintf(stderr, "Failed to create process record for process: %d\n", pid);
-        return false;
-    }
-
-    for (auto& map : maps) {
-        // skip library / map if prefix for the path doesn't match
-        if (!g_prefix_filter.empty() && !::android::base::StartsWith(map.name, g_prefix_filter)) {
-            continue;
-        }
-        // Skip maps based on map permissions
-        if (g_mapflags_mask &&
-            ((map.flags & (PROT_READ | PROT_WRITE | PROT_EXEC)) != g_mapflags_mask)) {
-            continue;
-        }
-
-        // skip blacklisted library / map names
-        if (!g_all_libs && (std::find(g_blacklisted_libs.begin(), g_blacklisted_libs.end(),
-                                      map.name) != g_blacklisted_libs.end())) {
-            continue;
-        }
-
-        auto [it, inserted] =
-            g_libs.insert(std::pair<std::string, LibRecord>(map.name, LibRecord(map.name)));
-        it->second.AddUsage(proc, map.usage);
-
-        if (!g_has_swap && map.usage.swap) {
-            g_has_swap = true;
-        }
-    }
-
-    return true;
-}
-
-static uint16_t parse_mapflags(const char* mapflags) {
-    uint16_t ret = 0;
-    for (const char* p = mapflags; *p; p++) {
-        switch (*p) {
-            case 'r':
-                ret |= PROT_READ;
-                break;
-            case 'w':
-                ret |= PROT_WRITE;
-                break;
-            case 'x':
-                ret |= PROT_EXEC;
-                break;
-            default:
-                error(EXIT_FAILURE, 0, "Invalid permissions string: %s, %s", mapflags, p);
-        }
-    }
-
-    return ret;
-}
-
-int main(int argc, char* argv[]) {
-    int opt;
-
-    auto pss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().pss < b.usage().pss : a.usage().pss > b.usage().pss;
-    };
-
-    auto uss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().uss < b.usage().uss : a.usage().uss > b.usage().uss;
-    };
-
-    auto vss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().vss < b.usage().vss : a.usage().vss > b.usage().vss;
-    };
-
-    auto rss_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().rss < b.usage().rss : a.usage().rss > b.usage().rss;
-    };
-
-    auto swap_sort = [](const ProcessRecord& a, const ProcessRecord& b) {
-        return g_reverse_sort ? a.usage().swap < b.usage().swap : a.usage().swap > b.usage().swap;
-    };
-
-    std::function<bool(const ProcessRecord&, const ProcessRecord&)> sort_func = pss_sort;
-
-    while ((opt = getopt(argc, argv, "acChkm:pP:uvrsR")) != -1) {
-        switch (opt) {
-            case 'a':
-                g_all_libs = true;
-                break;
-            case 'c':
-                g_pgflags = 0;
-                g_pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'C':
-                g_pgflags = g_pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            case 'k':
-                g_pgflags = g_pgflags_mask = (1 << KPF_KSM);
-                break;
-            case 'm':
-                g_mapflags_mask = parse_mapflags(optarg);
-                break;
-            case 'p':
-                sort_func = pss_sort;
-                break;
-            case 'P':
-                g_prefix_filter = optarg;
-                break;
-            case 'u':
-                sort_func = uss_sort;
-                break;
-            case 'v':
-                sort_func = vss_sort;
-                break;
-            case 'r':
-                sort_func = rss_sort;
-                break;
-            case 's':
-                sort_func = swap_sort;
-                break;
-            case 'R':
-                g_reverse_sort = true;
-                break;
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if (!read_all_pids(scan_libs_per_process)) {
-        error(EXIT_FAILURE, 0, "Failed to read all pids from the system");
-    }
-
-    printf(" %6s   %7s   %6s   %6s   %6s  ", "RSStot", "VSS", "RSS", "PSS", "USS");
-    if (g_has_swap) {
-        printf(" %6s  ", "Swap");
-    }
-    printf("Name/PID\n");
-
-    std::vector<LibRecord> v_libs;
-    v_libs.reserve(g_libs.size());
-    std::transform(g_libs.begin(), g_libs.end(), std::back_inserter(v_libs),
-        [] (std::pair<std::string, LibRecord> const& pair) { return pair.second; });
-
-    // sort the libraries by their pss
-    std::sort(v_libs.begin(), v_libs.end(),
-              [](const LibRecord& l1, const LibRecord& l2) { return l1.pss() > l2.pss(); });
-
-    for (auto& lib : v_libs) {
-        printf("%6" PRIu64 "K   %7s   %6s   %6s   %6s  ", lib.pss() / 1024, "", "", "", "");
-        if (g_has_swap) {
-            printf(" %6s  ", "");
-        }
-        printf("%s\n", lib.name().c_str());
-
-        // sort all mappings first
-
-        std::vector<ProcessRecord> procs;
-        procs.reserve(lib.processes().size());
-        std::transform(lib.processes().begin(), lib.processes().end(), std::back_inserter(procs),
-            [] (std::pair<pid_t, ProcessRecord> const& pair) { return pair.second; });
-
-        std::sort(procs.begin(), procs.end(), sort_func);
-
-        for (auto& p : procs) {
-            const MemUsage& usage = p.usage();
-            printf(" %6s  %7" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ", "",
-                   usage.vss / 1024, usage.rss / 1024, usage.pss / 1024, usage.uss / 1024);
-            if (g_has_swap) {
-                printf("%6" PRIu64 "K  ", usage.swap / 1024);
-            }
-            printf("  %s [%d]\n", p.cmdline().c_str(), p.pid());
-        }
-    }
-
-    return 0;
-}
diff --git a/libmeminfo/tools/procmem.cpp b/libmeminfo/tools/procmem.cpp
deleted file mode 100644
index b245f2a..0000000
--- a/libmeminfo/tools/procmem.cpp
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <iostream>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <meminfo/procmeminfo.h>
-
-using Vma = ::android::meminfo::Vma;
-using ProcMemInfo = ::android::meminfo::ProcMemInfo;
-using MemUsage = ::android::meminfo::MemUsage;
-
-// Global flags to control procmem output
-
-// Set to use page idle bits for working set detection
-bool use_pageidle = false;
-// hides map entries with zero rss
-bool hide_zeroes = false;
-// Reset working set and exit
-bool reset_wss = false;
-// Show working set, mutually exclusive with reset_wss;
-bool show_wss = false;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "Usage: %s [-i] [ -w | -W ] [ -p | -m ] [ -h ] pid\n"
-            "    -i  Uses idle page tracking for working set statistics.\n"
-            "    -w  Displays statistics for the working set only.\n"
-            "    -W  Resets the working set of the process.\n"
-            "    -p  Sort by PSS.\n"
-            "    -u  Sort by USS.\n"
-            "    -m  Sort by mapping order (as read from /proc).\n"
-            "    -h  Hide maps with no RSS.\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static void print_separator(std::stringstream& ss) {
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n",
-                                            "-------", "-------", "-------", "-------", "-------",
-                                            "-------", "-------", "-------", "");
-        return;
-    }
-    ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n",
-                                        "-------", "-------", "-------", "-------", "-------",
-                                        "-------", "-------", "-------", "-------", "");
-}
-
-static void print_header(std::stringstream& ss) {
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n", "WRss",
-                                            "WPss", "WUss", "WShCl", "WShDi", "WPrCl", "WPrDi",
-                                            "Flags", "Name");
-    } else {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %7s  %s\n",
-                                            "Vss", "Rss", "Pss", "Uss", "ShCl", "ShDi", "PrCl",
-                                            "PrDi", "Flags", "Name");
-    }
-    print_separator(ss);
-}
-
-static void print_stats(std::stringstream& ss, const MemUsage& stats) {
-    if (!show_wss) {
-        ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", stats.vss / 1024);
-    }
-
-    ss << ::android::base::StringPrintf("%6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64
-                                        "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ",
-                                        stats.rss / 1024, stats.pss / 1024, stats.uss / 1024,
-                                        stats.shared_clean / 1024, stats.shared_dirty / 1024,
-                                        stats.private_clean / 1024, stats.private_dirty / 1024);
-}
-
-static int show(const MemUsage& proc_stats, const std::vector<Vma>& maps) {
-    std::stringstream ss;
-    print_header(ss);
-    for (auto& vma : maps) {
-        const MemUsage& vma_stats = vma.usage;
-        if (hide_zeroes && vma_stats.rss == 0) {
-            continue;
-        }
-        print_stats(ss, vma_stats);
-
-        // TODO: b/141711064 fix libprocinfo to record (p)rivate or (s)hared flag
-        // for now always report as private
-        std::string flags_str("---p");
-        if (vma.flags & PROT_READ) flags_str[0] = 'r';
-        if (vma.flags & PROT_WRITE) flags_str[1] = 'w';
-        if (vma.flags & PROT_EXEC) flags_str[2] = 'x';
-
-        ss << ::android::base::StringPrintf("%7s  ", flags_str.c_str()) << vma.name << std::endl;
-    }
-    print_separator(ss);
-    print_stats(ss, proc_stats);
-    ss << "TOTAL" << std::endl;
-    std::cout << ss.str();
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    int opt;
-    auto pss_sort = [](const Vma& a, const Vma& b) {
-        uint64_t pss_a = a.usage.pss;
-        uint64_t pss_b = b.usage.pss;
-        return pss_a > pss_b;
-    };
-
-    auto uss_sort = [](const Vma& a, const Vma& b) {
-        uint64_t uss_a = a.usage.uss;
-        uint64_t uss_b = b.usage.uss;
-        return uss_a > uss_b;
-    };
-
-    std::function<bool(const Vma& a, const Vma& b)> sort_func = nullptr;
-    while ((opt = getopt(argc, argv, "himpuWw")) != -1) {
-        switch (opt) {
-            case 'h':
-                hide_zeroes = true;
-                break;
-            case 'i':
-                // TODO: libmeminfo doesn't support the flag to chose
-                // between idle page tracking vs clear_refs. So for now,
-                // this flag is unused and the library defaults to using
-                // /proc/<pid>/clear_refs for finding the working set.
-                use_pageidle = true;
-                break;
-            case 'm':
-                // this is the default
-                break;
-            case 'p':
-                sort_func = pss_sort;
-                break;
-            case 'u':
-                sort_func = uss_sort;
-                break;
-            case 'W':
-                reset_wss = true;
-                break;
-            case 'w':
-                show_wss = true;
-                break;
-            case '?':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if (optind != (argc - 1)) {
-        fprintf(stderr, "Need exactly one pid at the end\n");
-        usage(EXIT_FAILURE);
-    }
-
-    pid_t pid = atoi(argv[optind]);
-    if (pid == 0) {
-        std::cerr << "Invalid process id" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    if (reset_wss) {
-        if (!ProcMemInfo::ResetWorkingSet(pid)) {
-            std::cerr << "Failed to reset working set of pid : " << pid << std::endl;
-            exit(EXIT_FAILURE);
-        }
-        return 0;
-    }
-
-    ProcMemInfo proc(pid, show_wss);
-    const MemUsage& proc_stats = proc.Usage();
-    std::vector<Vma> maps(proc.Maps());
-    if (sort_func != nullptr) {
-        std::sort(maps.begin(), maps.end(), sort_func);
-    }
-
-    return show(proc_stats, maps);
-}
diff --git a/libmeminfo/tools/procrank.cpp b/libmeminfo/tools/procrank.cpp
deleted file mode 100644
index 1e44ff9..0000000
--- a/libmeminfo/tools/procrank.cpp
+++ /dev/null
@@ -1,536 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <linux/kernel-page-flags.h>
-#include <linux/oom.h>
-#include <meminfo/procmeminfo.h>
-#include <meminfo/sysmeminfo.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <iostream>
-#include <memory>
-#include <sstream>
-#include <vector>
-
-using ::android::meminfo::MemUsage;
-using ::android::meminfo::ProcMemInfo;
-
-struct ProcessRecord {
-  public:
-    ProcessRecord(pid_t pid, bool get_wss = false, uint64_t pgflags = 0, uint64_t pgflags_mask = 0)
-        : pid_(-1),
-          oomadj_(OOM_SCORE_ADJ_MAX + 1),
-          cmdline_(""),
-          proportional_swap_(0),
-          unique_swap_(0),
-          zswap_(0) {
-        std::unique_ptr<ProcMemInfo> procmem =
-                std::make_unique<ProcMemInfo>(pid, get_wss, pgflags, pgflags_mask);
-        if (procmem == nullptr) {
-            std::cerr << "Failed to create ProcMemInfo for: " << pid << std::endl;
-            return;
-        }
-
-        std::string fname = ::android::base::StringPrintf("/proc/%d/oom_score_adj", pid);
-        auto oomscore_fp =
-                std::unique_ptr<FILE, decltype(&fclose)>{fopen(fname.c_str(), "re"), fclose};
-        if (oomscore_fp == nullptr) {
-            std::cerr << "Failed to open oom_score_adj file: " << fname << std::endl;
-            return;
-        }
-
-        if (fscanf(oomscore_fp.get(), "%d\n", &oomadj_) != 1) {
-            std::cerr << "Failed to read oomadj from: " << fname << std::endl;
-            return;
-        }
-
-        fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-        if (!::android::base::ReadFileToString(fname, &cmdline_)) {
-            std::cerr << "Failed to read cmdline from: " << fname << std::endl;
-            cmdline_ = "<unknown>";
-        }
-        // We deliberately don't read the proc/<pid>cmdline file directly into 'cmdline_'
-        // because of some processes showing up cmdlines that end with "0x00 0x0A 0x00"
-        // e.g. xtra-daemon, lowi-server
-        // The .c_str() assignment below then takes care of trimming the cmdline at the first
-        // 0x00. This is how original procrank worked (luckily)
-        cmdline_.resize(strlen(cmdline_.c_str()));
-        usage_or_wss_ = get_wss ? procmem->Wss() : procmem->Usage();
-        swap_offsets_ = procmem->SwapOffsets();
-        pid_ = pid;
-    }
-
-    bool valid() const { return pid_ != -1; }
-
-    void CalculateSwap(const uint16_t* swap_offset_array, float zram_compression_ratio) {
-        for (auto& off : swap_offsets_) {
-            proportional_swap_ += getpagesize() / swap_offset_array[off];
-            unique_swap_ += swap_offset_array[off] == 1 ? getpagesize() : 0;
-            zswap_ = proportional_swap_ * zram_compression_ratio;
-        }
-    }
-
-    // Getters
-    pid_t pid() const { return pid_; }
-    const std::string& cmdline() const { return cmdline_; }
-    int32_t oomadj() const { return oomadj_; }
-    uint64_t proportional_swap() const { return proportional_swap_; }
-    uint64_t unique_swap() const { return unique_swap_; }
-    uint64_t zswap() const { return zswap_; }
-
-    // Wrappers to ProcMemInfo
-    const std::vector<uint16_t>& SwapOffsets() const { return swap_offsets_; }
-    const MemUsage& Usage() const { return usage_or_wss_; }
-    const MemUsage& Wss() const { return usage_or_wss_; }
-
-  private:
-    pid_t pid_;
-    int32_t oomadj_;
-    std::string cmdline_;
-    uint64_t proportional_swap_;
-    uint64_t unique_swap_;
-    uint64_t zswap_;
-    MemUsage usage_or_wss_;
-    std::vector<uint16_t> swap_offsets_;
-};
-
-// Show working set instead of memory consumption
-bool show_wss = false;
-// Reset working set of each process
-bool reset_wss = false;
-// Show per-process oom_score_adj column
-bool show_oomadj = false;
-// True if the device has swap enabled
-bool has_swap = false;
-// True, if device has zram enabled
-bool has_zram = false;
-// If zram is enabled, the compression ratio is zram used / swap used.
-float zram_compression_ratio = 0.0;
-// Sort process in reverse, default is descending
-bool reverse_sort = false;
-
-// Calculated total memory usage across all processes in the system
-uint64_t total_pss = 0;
-uint64_t total_uss = 0;
-uint64_t total_swap = 0;
-uint64_t total_pswap = 0;
-uint64_t total_uswap = 0;
-uint64_t total_zswap = 0;
-
-[[noreturn]] static void usage(int exit_status) {
-    std::cerr << "Usage: " << getprogname() << " [ -W ] [ -v | -r | -p | -u | -s | -h ]"
-              << std::endl
-              << "    -v  Sort by VSS." << std::endl
-              << "    -r  Sort by RSS." << std::endl
-              << "    -p  Sort by PSS." << std::endl
-              << "    -u  Sort by USS." << std::endl
-              << "    -s  Sort by swap." << std::endl
-              << "        (Default sort order is PSS.)" << std::endl
-              << "    -R  Reverse sort order (default is descending)." << std::endl
-              << "    -c  Only show cached (storage backed) pages" << std::endl
-              << "    -C  Only show non-cached (ram/swap backed) pages" << std::endl
-              << "    -k  Only show pages collapsed by KSM" << std::endl
-              << "    -w  Display statistics for working set only." << std::endl
-              << "    -W  Reset working set of all processes." << std::endl
-              << "    -o  Show and sort by oom score against lowmemorykiller thresholds."
-              << std::endl
-              << "    -h  Display this help screen." << std::endl;
-    exit(exit_status);
-}
-
-static bool read_all_pids(std::vector<pid_t>* pids, std::function<bool(pid_t pid)> for_each_pid) {
-    pids->clear();
-    std::unique_ptr<DIR, int (*)(DIR*)> procdir(opendir("/proc"), closedir);
-    if (!procdir) return false;
-
-    struct dirent* dir;
-    pid_t pid;
-    while ((dir = readdir(procdir.get()))) {
-        if (!::android::base::ParseInt(dir->d_name, &pid)) continue;
-        if (!for_each_pid(pid)) return false;
-        pids->emplace_back(pid);
-    }
-
-    return true;
-}
-
-static bool count_swap_offsets(const ProcessRecord& proc, uint16_t* swap_offset_array,
-                               uint32_t size) {
-    const std::vector<uint16_t>& swp_offs = proc.SwapOffsets();
-    for (auto& off : swp_offs) {
-        if (off >= size) {
-            std::cerr << "swap offset " << off << " is out of bounds for process: " << proc.pid()
-                      << std::endl;
-            return false;
-        }
-
-        if (swap_offset_array[off] == USHRT_MAX) {
-            std::cerr << "swap offset " << off << " ref count overflow in process: " << proc.pid()
-                      << std::endl;
-            return false;
-        }
-
-        swap_offset_array[off]++;
-    }
-
-    return true;
-}
-
-static void print_header(std::stringstream& ss) {
-    ss.str("");
-    ss << ::android::base::StringPrintf("%5s  ", "PID");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "oom");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "WRss", "WPss", "WUss");
-        // now swap statistics here, working set pages by definition shouldn't end up in swap.
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %7s  %7s  ", "Vss", "Rss", "Pss", "Uss");
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "Swap", "PSwap", "USwap");
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%7s  ", "ZSwap");
-            }
-        }
-    }
-
-    ss << "cmdline";
-}
-
-static void print_process_record(std::stringstream& ss, ProcessRecord& proc) {
-    ss << ::android::base::StringPrintf("%5d  ", proc.pid());
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5d  ", proc.oomadj());
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  ",
-                                            proc.Wss().rss / 1024, proc.Wss().pss / 1024,
-                                            proc.Wss().uss / 1024);
-    } else {
-        ss << ::android::base::StringPrintf("%7" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64 "K  %6" PRIu64
-                                            "K  ",
-                                            proc.Usage().vss / 1024, proc.Usage().rss / 1024,
-                                            proc.Usage().pss / 1024, proc.Usage().uss / 1024);
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.Usage().swap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.proportional_swap() / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", proc.unique_swap() / 1024);
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", (proc.zswap() / 1024));
-            }
-        }
-    }
-}
-
-static void print_processes(std::stringstream& ss, std::vector<ProcessRecord>& procs,
-                            uint16_t* swap_offset_array) {
-    for (auto& proc : procs) {
-        total_pss += show_wss ? proc.Wss().pss : proc.Usage().pss;
-        total_uss += show_wss ? proc.Wss().uss : proc.Usage().uss;
-        if (!show_wss && has_swap) {
-            proc.CalculateSwap(swap_offset_array, zram_compression_ratio);
-            total_swap += proc.Usage().swap;
-            total_pswap += proc.proportional_swap();
-            total_uswap += proc.unique_swap();
-            if (has_zram) {
-                total_zswap += proc.zswap();
-            }
-        }
-
-        print_process_record(ss, proc);
-        ss << proc.cmdline() << std::endl;
-    }
-}
-
-static void print_separator(std::stringstream& ss) {
-    ss << ::android::base::StringPrintf("%5s  ", "");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "", "------", "------");
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %7s  %7s  ", "", "", "------", "------");
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%7s  %7s  %7s  ", "------", "------", "------");
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%7s  ", "------");
-            }
-        }
-    }
-
-    ss << ::android::base::StringPrintf("%s", "------");
-}
-
-static void print_totals(std::stringstream& ss) {
-    ss << ::android::base::StringPrintf("%5s  ", "");
-    if (show_oomadj) {
-        ss << ::android::base::StringPrintf("%5s  ", "");
-    }
-
-    if (show_wss) {
-        ss << ::android::base::StringPrintf("%7s  %6" PRIu64 "K  %6" PRIu64 "K  ", "",
-                                            total_pss / 1024, total_uss / 1024);
-    } else {
-        ss << ::android::base::StringPrintf("%8s  %7s  %6" PRIu64 "K  %6" PRIu64 "K  ", "", "",
-                                            total_pss / 1024, total_uss / 1024);
-        if (has_swap) {
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_swap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_pswap / 1024);
-            ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_uswap / 1024);
-            if (has_zram) {
-                ss << ::android::base::StringPrintf("%6" PRIu64 "K  ", total_zswap / 1024);
-            }
-        }
-    }
-    ss << "TOTAL";
-}
-
-static void print_sysmeminfo(std::stringstream& ss, ::android::meminfo::SysMemInfo& smi) {
-    if (has_swap) {
-        ss << ::android::base::StringPrintf("ZRAM: %" PRIu64 "K physical used for %" PRIu64
-                                            "K in swap "
-                                            "(%" PRIu64 "K total swap)",
-                                            smi.mem_zram_kb(),
-                                            (smi.mem_swap_kb() - smi.mem_swap_free_kb()),
-                                            smi.mem_swap_kb())
-           << std::endl;
-    }
-
-    ss << ::android::base::StringPrintf(" RAM: %" PRIu64 "K total, %" PRIu64 "K free, %" PRIu64
-                                        "K buffers, "
-                                        "%" PRIu64 "K cached, %" PRIu64 "K shmem, %" PRIu64
-                                        "K slab",
-                                        smi.mem_total_kb(), smi.mem_free_kb(), smi.mem_buffers_kb(),
-                                        smi.mem_cached_kb(), smi.mem_shmem_kb(), smi.mem_slab_kb());
-}
-
-int main(int argc, char* argv[]) {
-    auto pss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.pss < stats_b.pss : stats_a.pss > stats_b.pss;
-    };
-
-    auto uss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.uss < stats_b.uss : stats_a.uss > stats_b.uss;
-    };
-
-    auto rss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.rss < stats_b.rss : stats_a.rss > stats_b.rss;
-    };
-
-    auto vss_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.vss < stats_b.vss : stats_a.vss > stats_b.vss;
-    };
-
-    auto swap_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        MemUsage stats_a = show_wss ? a.Wss() : a.Usage();
-        MemUsage stats_b = show_wss ? b.Wss() : b.Usage();
-        return reverse_sort ? stats_a.swap < stats_b.swap : stats_a.swap > stats_b.swap;
-    };
-
-    auto oomadj_sort = [](ProcessRecord& a, ProcessRecord& b) {
-        return reverse_sort ? a.oomadj() < b.oomadj() : a.oomadj() > b.oomadj();
-    };
-
-    // default PSS sort
-    std::function<bool(ProcessRecord & a, ProcessRecord & b)> proc_sort = pss_sort;
-
-    // count all pages by default
-    uint64_t pgflags = 0;
-    uint64_t pgflags_mask = 0;
-
-    int opt;
-    while ((opt = getopt(argc, argv, "cChkoprRsuvwW")) != -1) {
-        switch (opt) {
-            case 'c':
-                pgflags = 0;
-                pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'C':
-                pgflags = (1 << KPF_SWAPBACKED);
-                pgflags_mask = (1 << KPF_SWAPBACKED);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            case 'k':
-                pgflags = (1 << KPF_KSM);
-                pgflags_mask = (1 << KPF_KSM);
-                break;
-            case 'o':
-                proc_sort = oomadj_sort;
-                show_oomadj = true;
-                break;
-            case 'p':
-                proc_sort = pss_sort;
-                break;
-            case 'r':
-                proc_sort = rss_sort;
-                break;
-            case 'R':
-                reverse_sort = true;
-                break;
-            case 's':
-                proc_sort = swap_sort;
-                break;
-            case 'u':
-                proc_sort = uss_sort;
-                break;
-            case 'v':
-                proc_sort = vss_sort;
-                break;
-            case 'w':
-                show_wss = true;
-                break;
-            case 'W':
-                reset_wss = true;
-                break;
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    std::vector<pid_t> pids;
-    std::vector<ProcessRecord> procs;
-    if (reset_wss) {
-        if (!read_all_pids(&pids,
-                           [&](pid_t pid) -> bool { return ProcMemInfo::ResetWorkingSet(pid); })) {
-            std::cerr << "Failed to reset working set of all processes" << std::endl;
-            exit(EXIT_FAILURE);
-        }
-        // we are done, all other options passed to procrank are ignored in the presence of '-W'
-        return 0;
-    }
-
-    ::android::meminfo::SysMemInfo smi;
-    if (!smi.ReadMemInfo()) {
-        std::cerr << "Failed to get system memory info" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    // Figure out swap and zram
-    uint64_t swap_total = smi.mem_swap_kb() * 1024;
-    has_swap = swap_total > 0;
-    // Allocate the swap array
-    auto swap_offset_array = std::make_unique<uint16_t[]>(swap_total / getpagesize());
-    if (has_swap) {
-        has_zram = smi.mem_zram_kb() > 0;
-        if (has_zram) {
-            zram_compression_ratio = static_cast<float>(smi.mem_zram_kb()) /
-                                     (smi.mem_swap_kb() - smi.mem_swap_free_kb());
-        }
-    }
-
-    auto mark_swap_usage = [&](pid_t pid) -> bool {
-        ProcessRecord proc(pid, show_wss, pgflags, pgflags_mask);
-        if (!proc.valid()) {
-            // Check to see if the process is still around, skip the process if the proc
-            // directory is inaccessible. It was most likely killed while creating the process
-            // record
-            std::string procdir = ::android::base::StringPrintf("/proc/%d", pid);
-            if (access(procdir.c_str(), F_OK | R_OK)) return true;
-
-            // Warn if we failed to gather process stats even while it is still alive.
-            // Return success here, so we continue to print stats for other processes.
-            std::cerr << "warning: failed to create process record for: " << pid << std::endl;
-            return true;
-        }
-
-        // Skip processes with no memory mappings
-        uint64_t vss = show_wss ? proc.Wss().vss : proc.Usage().vss;
-        if (vss == 0) return true;
-
-        // collect swap_offset counts from all processes in 1st pass
-        if (!show_wss && has_swap &&
-            !count_swap_offsets(proc, swap_offset_array.get(), swap_total / getpagesize())) {
-            std::cerr << "Failed to count swap offsets for process: " << pid << std::endl;
-            return false;
-        }
-
-        procs.emplace_back(std::move(proc));
-        return true;
-    };
-
-    // Get a list of all pids currently running in the system in 1st pass through all processes.
-    // Mark each swap offset used by the process as we find them for calculating proportional
-    // swap usage later.
-    if (!read_all_pids(&pids, mark_swap_usage)) {
-        std::cerr << "Failed to read all pids from the system" << std::endl;
-        exit(EXIT_FAILURE);
-    }
-
-    std::stringstream ss;
-    if (procs.empty()) {
-        // This would happen in corner cases where procrank is being run to find KSM usage on a
-        // system with no KSM and combined with working set determination as follows
-        //   procrank -w -u -k
-        //   procrank -w -s -k
-        //   procrank -w -o -k
-        ss << "<empty>" << std::endl << std::endl;
-        print_sysmeminfo(ss, smi);
-        ss << std::endl;
-        std::cout << ss.str();
-        return 0;
-    }
-
-    // Sort all process records, default is PSS descending
-    std::sort(procs.begin(), procs.end(), proc_sort);
-
-    // start dumping output in string stream
-    print_header(ss);
-    ss << std::endl;
-
-    // 2nd pass to calculate and get per process stats to add them up
-    print_processes(ss, procs, swap_offset_array.get());
-
-    // Add separator to output
-    print_separator(ss);
-    ss << std::endl;
-
-    // Add totals to output
-    print_totals(ss);
-    ss << std::endl << std::endl;
-
-    // Add system information at the end
-    print_sysmeminfo(ss, smi);
-    ss << std::endl;
-
-    // dump on the screen
-    std::cout << ss.str();
-
-    return 0;
-}
diff --git a/libmeminfo/tools/showmap.cpp b/libmeminfo/tools/showmap.cpp
deleted file mode 100644
index 72ab0f3..0000000
--- a/libmeminfo/tools/showmap.cpp
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/mman.h>
-#include <sys/signal.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::Vma;
-
-struct VmaInfo {
-    Vma vma;
-    bool is_bss;
-    uint32_t count;
-
-    VmaInfo() = default;
-    VmaInfo(const Vma& v) : vma(v), is_bss(false), count(1) {}
-    VmaInfo(const Vma& v, bool bss) : vma(v), is_bss(bss), count(1) {}
-    VmaInfo(const Vma& v, const std::string& name, bool bss) : vma(v), is_bss(bss), count(1) {
-        vma.name = name;
-    }
-};
-
-// Global options
-static std::string g_filename = "";
-static bool g_merge_by_names = false;
-static bool g_terse = false;
-static bool g_verbose = false;
-static bool g_show_addr = false;
-static bool g_quiet = false;
-static pid_t g_pid = -1;
-
-static VmaInfo g_total;
-static std::vector<VmaInfo> g_vmas;
-
-[[noreturn]] static void usage(const char* progname, int exit_status) {
-    fprintf(stderr,
-            "%s [-aqtv] [-f FILE] PID\n"
-            "-a\taddresses (show virtual memory map)\n"
-            "-q\tquiet (don't show error if map could not be read)\n"
-            "-t\tterse (show only items with private pages)\n"
-            "-v\tverbose (don't coalesce maps with the same name)\n"
-            "-f\tFILE (read from input from FILE instead of PID)\n",
-            progname);
-
-    exit(exit_status);
-}
-
-static bool is_library(const std::string& name) {
-    return (name.size() > 4) && (name[0] == '/') && ::android::base::EndsWith(name, ".so");
-}
-
-static bool insert_before(const VmaInfo& a, const VmaInfo& b) {
-    if (g_show_addr) {
-        return (a.vma.start < b.vma.start || (a.vma.start == b.vma.start && a.vma.end < b.vma.end));
-    }
-
-    return strcmp(a.vma.name.c_str(), b.vma.name.c_str()) < 0;
-}
-
-static void collect_vma(const Vma& vma) {
-    if (g_vmas.empty()) {
-        g_vmas.emplace_back(vma);
-        return;
-    }
-
-    VmaInfo current(vma);
-    VmaInfo& last = g_vmas.back();
-    // determine if this is bss;
-    if (vma.name.empty()) {
-        if (last.vma.end == current.vma.start && is_library(last.vma.name)) {
-            current.vma.name = last.vma.name;
-            current.is_bss = true;
-        } else {
-            current.vma.name = "[anon]";
-        }
-    }
-
-    std::vector<VmaInfo>::iterator it;
-    for (it = g_vmas.begin(); it != g_vmas.end(); it++) {
-        if (g_merge_by_names && (it->vma.name == current.vma.name)) {
-            it->vma.usage.vss += current.vma.usage.vss;
-            it->vma.usage.rss += current.vma.usage.rss;
-            it->vma.usage.pss += current.vma.usage.pss;
-
-            it->vma.usage.shared_clean += current.vma.usage.shared_clean;
-            it->vma.usage.shared_dirty += current.vma.usage.shared_dirty;
-            it->vma.usage.private_clean += current.vma.usage.private_clean;
-            it->vma.usage.private_dirty += current.vma.usage.private_dirty;
-            it->vma.usage.swap += current.vma.usage.swap;
-            it->vma.usage.swap_pss += current.vma.usage.swap_pss;
-            it->is_bss &= current.is_bss;
-            it->count++;
-            break;
-        }
-
-        if (insert_before(current, *it)) {
-            g_vmas.insert(it, current);
-            break;
-        }
-    }
-
-    if (it == g_vmas.end()) {
-        g_vmas.emplace_back(current);
-    }
-}
-
-static void print_header() {
-    const char* addr1 = g_show_addr ? "           start              end " : "";
-    const char* addr2 = g_show_addr ? "            addr             addr " : "";
-
-    printf("%s virtual                     shared   shared  private  private\n", addr1);
-    printf("%s    size      RSS      PSS    clean    dirty    clean    dirty     swap  swapPSS",
-           addr2);
-    if (!g_verbose && !g_show_addr) {
-        printf("   # ");
-    }
-    if (g_verbose) {
-        printf(" flags ");
-    }
-    printf(" object\n");
-}
-
-static void print_divider() {
-    if (g_show_addr) {
-        printf("-------- -------- ");
-    }
-    printf("-------- -------- -------- -------- -------- -------- -------- -------- -------- ");
-    if (!g_verbose && !g_show_addr) {
-        printf("---- ");
-    }
-    if (g_verbose) {
-        printf("------ ");
-    }
-    printf("------------------------------\n");
-}
-
-static void print_vmainfo(const VmaInfo& v, bool total) {
-    if (g_show_addr) {
-        if (total) {
-            printf("                                  ");
-        } else {
-            printf("%16" PRIx64 " %16" PRIx64 " ", v.vma.start, v.vma.end);
-        }
-    }
-    printf("%8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64 " %8" PRIu64
-           " %8" PRIu64 " %8" PRIu64 " ",
-           v.vma.usage.vss, v.vma.usage.rss, v.vma.usage.pss, v.vma.usage.shared_clean,
-           v.vma.usage.shared_dirty, v.vma.usage.private_clean, v.vma.usage.private_dirty,
-           v.vma.usage.swap, v.vma.usage.swap_pss);
-    if (!g_verbose && !g_show_addr) {
-        printf("%4" PRIu32 " ", v.count);
-    }
-    if (g_verbose) {
-        if (total) {
-            printf("       ");
-        } else {
-            std::string flags_str("---");
-            if (v.vma.flags & PROT_READ) flags_str[0] = 'r';
-            if (v.vma.flags & PROT_WRITE) flags_str[1] = 'w';
-            if (v.vma.flags & PROT_EXEC) flags_str[2] = 'x';
-
-            printf("%6s ", flags_str.c_str());
-        }
-    }
-}
-
-static int showmap(void) {
-    if (!::android::meminfo::ForEachVmaFromFile(g_filename, collect_vma)) {
-        if (!g_quiet) {
-            fprintf(stderr, "Failed to parse file %s\n", g_filename.c_str());
-        }
-        return 1;
-    }
-
-    print_header();
-    print_divider();
-
-    for (const auto& v : g_vmas) {
-        g_total.vma.usage.vss += v.vma.usage.vss;
-        g_total.vma.usage.rss += v.vma.usage.rss;
-        g_total.vma.usage.pss += v.vma.usage.pss;
-
-        g_total.vma.usage.private_clean += v.vma.usage.private_clean;
-        g_total.vma.usage.private_dirty += v.vma.usage.private_dirty;
-        g_total.vma.usage.shared_clean += v.vma.usage.shared_clean;
-        g_total.vma.usage.shared_dirty += v.vma.usage.shared_dirty;
-
-        g_total.vma.usage.swap += v.vma.usage.swap;
-        g_total.vma.usage.swap_pss += v.vma.usage.swap_pss;
-        g_total.count += v.count;
-
-        if (g_terse && !(v.vma.usage.private_dirty || v.vma.usage.private_clean)) {
-            continue;
-        }
-
-        print_vmainfo(v, false);
-        printf("%s%s\n", v.vma.name.c_str(), v.is_bss ? " [bss]" : "");
-    }
-
-    print_divider();
-    print_header();
-    print_divider();
-
-    print_vmainfo(g_total, true);
-    printf("TOTAL\n");
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    signal(SIGPIPE, SIG_IGN);
-    struct option longopts[] = {
-            {"help", no_argument, nullptr, 'h'},
-            {0, 0, nullptr, 0},
-    };
-
-    int opt;
-    while ((opt = getopt_long(argc, argv, "tvaqf:h", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 't':
-                g_terse = true;
-                break;
-            case 'a':
-                g_show_addr = true;
-                break;
-            case 'v':
-                g_verbose = true;
-                break;
-            case 'q':
-                g_quiet = true;
-                break;
-            case 'f':
-                g_filename = optarg;
-                break;
-            case 'h':
-                usage(argv[0], EXIT_SUCCESS);
-            default:
-                usage(argv[0], EXIT_FAILURE);
-        }
-    }
-
-    if (g_filename.empty()) {
-        if ((argc - 1) < optind) {
-            fprintf(stderr, "Invalid arguments: Must provide <pid> at the end\n");
-            usage(argv[0], EXIT_FAILURE);
-        }
-
-        g_pid = atoi(argv[optind]);
-        if (g_pid <= 0) {
-            fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-            usage(argv[0], EXIT_FAILURE);
-        }
-
-        g_filename = ::android::base::StringPrintf("/proc/%d/smaps", g_pid);
-    }
-
-    g_merge_by_names = !g_verbose && !g_show_addr;
-    return showmap();
-}
diff --git a/libmeminfo/tools/wsstop.cpp b/libmeminfo/tools/wsstop.cpp
deleted file mode 100644
index 368d04e..0000000
--- a/libmeminfo/tools/wsstop.cpp
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <meminfo/pageacct.h>
-#include <meminfo/procmeminfo.h>
-
-using ::android::meminfo::ProcMemInfo;
-using ::android::meminfo::Vma;
-
-// Global options
-static int32_t g_delay = 0;
-static int32_t g_total = 2;
-static pid_t g_pid = -1;
-
-[[noreturn]] static void usage(int exit_status) {
-    fprintf(stderr,
-            "%s [-d DELAY_BETWEEN_EACH_SAMPLE] [-n REFRESH_TOTAL] PID\n"
-            "-d\tdelay between each working set sample (default 0)\n"
-            "-n\ttotal number of refreshes before we exit (default 2)\n",
-            getprogname());
-
-    exit(exit_status);
-}
-
-static void print_header() {
-    const char* addr1 = "           start              end ";
-    const char* addr2 = "            addr             addr ";
-
-    printf("%s  virtual                        shared    shared   private   private\n", addr1);
-    printf("%s     size       RSS       PSS     clean     dirty     clean     dirty      swap   "
-           "swapPSS",
-           addr2);
-    printf(" object\n");
-}
-
-static void print_divider() {
-    printf("---------------- ---------------- ");
-    printf("--------- --------- --------- --------- --------- --------- --------- --------- "
-           "--------- ");
-    printf("------------------------------\n");
-}
-
-static void print_vma(const Vma& v) {
-    printf("%16" PRIx64 " %16" PRIx64 " ", v.start, v.end);
-    printf("%8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64
-           "K %8" PRIu64 "K %8" PRIu64 "K %8" PRIu64 "K ",
-           v.usage.vss / 1024, v.usage.rss / 1024, v.usage.pss / 1024, v.usage.shared_clean / 1024,
-           v.usage.shared_dirty / 1024, v.usage.private_clean / 1024, v.usage.private_dirty / 1024,
-           v.usage.swap / 1024, v.usage.swap_pss / 1024);
-    printf("%s\n", v.name.c_str());
-}
-
-static bool same_vma(const Vma& cur, const Vma& last) {
-    return (cur.start == last.start && cur.end == last.end && cur.name == last.name &&
-            cur.flags == last.flags && cur.offset == last.offset);
-}
-
-static Vma diff_vma_params(const Vma& cur, const Vma& last) {
-    Vma res;
-    res.usage.shared_clean = cur.usage.shared_clean > last.usage.shared_clean
-                                     ? cur.usage.shared_clean - last.usage.shared_clean
-                                     : 0;
-    res.usage.shared_dirty = cur.usage.shared_dirty > last.usage.shared_dirty
-                                     ? cur.usage.shared_dirty - last.usage.shared_dirty
-                                     : 0;
-    res.usage.private_clean = cur.usage.private_clean > last.usage.private_clean
-                                      ? cur.usage.private_clean - last.usage.private_clean
-                                      : 0;
-    res.usage.private_dirty = cur.usage.private_dirty > last.usage.private_dirty
-                                      ? cur.usage.private_dirty - last.usage.private_dirty
-                                      : 0;
-
-    res.usage.rss = cur.usage.rss > last.usage.rss ? cur.usage.rss - last.usage.rss : 0;
-    res.usage.pss = cur.usage.pss > last.usage.pss ? cur.usage.pss - last.usage.pss : 0;
-    res.usage.uss = cur.usage.uss > last.usage.uss ? cur.usage.uss - last.usage.uss : 0;
-    res.usage.swap = cur.usage.swap > last.usage.swap ? cur.usage.swap - last.usage.swap : 0;
-    res.usage.swap_pss =
-            cur.usage.swap_pss > last.usage.swap_pss ? cur.usage.swap_pss - last.usage.swap_pss : 0;
-
-    // set vma properties to the same as the current one.
-    res.start = cur.start;
-    res.end = cur.end;
-    res.offset = cur.offset;
-    res.flags = cur.flags;
-    res.name = cur.name;
-    return res;
-}
-
-static void diff_workingset(std::vector<Vma>& wss, std::vector<Vma>& old, std::vector<Vma>* res) {
-    res->clear();
-    auto vma_sorter = [](const Vma& a, const Vma& b) { return a.start < b.start; };
-    std::sort(wss.begin(), wss.end(), vma_sorter);
-    std::sort(old.begin(), old.end(), vma_sorter);
-    if (old.empty()) {
-        *res = wss;
-        return;
-    }
-
-    for (auto& i : wss) {
-        bool found_same_vma = false;
-        // TODO: This is highly inefficient, fix it if it takes
-        // too long. Worst case will be system_server
-        for (auto& j : old) {
-            if (same_vma(i, j)) {
-                res->emplace_back(diff_vma_params(i, j));
-                found_same_vma = true;
-                break;
-            }
-        }
-
-        if (!found_same_vma) {
-            res->emplace_back(i);
-        }
-    }
-
-    std::sort(res->begin(), res->end(), vma_sorter);
-    return;
-}
-
-static int workingset() {
-    std::vector<Vma> last_wss = {};
-    std::vector<Vma> diff_wss = {};
-    uint32_t nr_refresh = 0;
-
-    while (true) {
-        std::unique_ptr<ProcMemInfo> proc_mem = std::make_unique<ProcMemInfo>(g_pid, true);
-        std::vector<Vma> wss = proc_mem->MapsWithPageIdle();
-
-        diff_workingset(wss, last_wss, &diff_wss);
-        diff_wss.erase(std::remove_if(diff_wss.begin(), diff_wss.end(),
-                                      [](const auto& v) { return v.usage.rss == 0; }),
-                       diff_wss.end());
-        if ((nr_refresh % 5) == 0) {
-            print_header();
-            print_divider();
-        }
-
-        for (const auto& v : diff_wss) {
-            print_vma(v);
-        }
-
-        nr_refresh++;
-        if (nr_refresh == g_total) {
-            break;
-        }
-
-        last_wss = wss;
-        sleep(g_delay);
-        print_divider();
-    }
-
-    return 0;
-}
-
-int main(int argc, char* argv[]) {
-    struct option longopts[] = {
-            {"help", no_argument, nullptr, 'h'},
-            {0, 0, nullptr, 0},
-    };
-
-    int opt;
-    while ((opt = getopt_long(argc, argv, "d:n:h", longopts, nullptr)) != -1) {
-        switch (opt) {
-            case 'd':
-                g_delay = atoi(optarg);
-                break;
-            case 'n':
-                g_total = atoi(optarg);
-                break;
-            case 'h':
-                usage(EXIT_SUCCESS);
-            default:
-                usage(EXIT_FAILURE);
-        }
-    }
-
-    if ((argc - 1) < optind) {
-        fprintf(stderr, "Invalid arguments: Must provide <pid> at the end\n");
-        usage(EXIT_FAILURE);
-    }
-
-    g_pid = atoi(argv[optind]);
-    if (g_pid <= 0) {
-        fprintf(stderr, "Invalid process id %s\n", argv[optind]);
-        usage(EXIT_FAILURE);
-    }
-
-    if (!::android::meminfo::PageAcct::KernelHasPageIdle()) {
-        fprintf(stderr, "Missing support for Idle page tracking in the kernel\n");
-        return 0;
-    }
-
-    return workingset();
-}
diff --git a/libmeminfo/vts/Android.bp b/libmeminfo/vts/Android.bp
deleted file mode 100644
index a92f669..0000000
--- a/libmeminfo/vts/Android.bp
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2019 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_defaults {
-    name: "vts_meminfo_defaults",
-    defaults: ["libmeminfo_defaults"],
-    srcs: ["vts_meminfo_test.cpp"],
-    static_libs: ["libmeminfo"],
-}
-
-cc_test {
-    name: "vts_meminfo_test",
-    defaults: ["vts_meminfo_defaults"],
-}
-
-cc_test {
-    name: "vts_core_meminfo_test",
-    defaults: ["vts_meminfo_defaults"],
-    test_suites: ["vts-core"],
-    auto_gen_config: true,
-    test_min_api_level: 29,
-}
diff --git a/libmeminfo/vts/AndroidTest.xml b/libmeminfo/vts/AndroidTest.xml
deleted file mode 100644
index 9614025..0000000
--- a/libmeminfo/vts/AndroidTest.xml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2019 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-<configuration description="Config for VTS VtsKernelMemInfoTest.">
-    <option name="config-descriptor:metadata" key="plan" value="vts-kernel" />
-    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.VtsFilePusher">
-        <option name="abort-on-push-failure" value="false"/>
-        <option name="push-group" value="HostDrivenTest.push"/>
-    </target_preparer>
-    <test class="com.android.tradefed.testtype.VtsMultiDeviceTest">
-        <option name="test-module-name" value="VtsKernelMemInfoTest"/>
-        <option name="binary-test-source" value="_32bit::DATA/nativetest/vts_meminfo_test/vts_meminfo_test" />
-        <option name="binary-test-source" value="_64bit::DATA/nativetest64/vts_meminfo_test/vts_meminfo_test" />
-        <option name="binary-test-type" value="gtest"/>
-        <option name="precondition-first-api-level" value="29" />
-        <option name="test-timeout" value="10m"/>
-    </test>
-</configuration>
diff --git a/libmemtrack/.clang-format b/libmemtrack/.clang-format
deleted file mode 120000
index 1af4f51..0000000
--- a/libmemtrack/.clang-format
+++ /dev/null
@@ -1 +0,0 @@
-../.clang-format-4
\ No newline at end of file
diff --git a/libmemtrack/Android.bp b/libmemtrack/Android.bp
deleted file mode 100644
index c7dff5a..0000000
--- a/libmemtrack/Android.bp
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2013 The Android Open Source Project
-
-cc_library_shared {
-    name: "libmemtrack",
-    vendor_available: true,
-    vndk: {
-        enabled: true,
-    },
-    srcs: ["memtrack.cpp"],
-    export_include_dirs: ["include"],
-    local_include_dirs: ["include"],
-    include_dirs: ["hardware/libhardware/include"],
-    shared_libs: [
-        "libhardware",
-        "liblog",
-        "libbase",
-        "libhidlbase",
-        "libutils",
-        "android.hardware.memtrack@1.0",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
-
-cc_binary {
-    name: "memtrack_test",
-    srcs: ["memtrack_test.cpp"],
-    static_libs: ["libc++fs"],
-    shared_libs: [
-        "libbase",
-        "libmemtrack",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
diff --git a/libmemtrack/OWNERS b/libmemtrack/OWNERS
deleted file mode 100644
index 70b375f..0000000
--- a/libmemtrack/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-ccross@google.com
diff --git a/libmemtrack/include/memtrack/memtrack.h b/libmemtrack/include/memtrack/memtrack.h
deleted file mode 100644
index 2134a6f..0000000
--- a/libmemtrack/include/memtrack/memtrack.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _LIBMEMTRACK_MEMTRACK_H_
-#define _LIBMEMTRACK_MEMTRACK_H_
-
-#include <sys/types.h>
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * struct memtrack_proc
- *
- * an opaque handle to the memory stats on a process.
- * Created with memtrack_proc_new, destroyed by
- * memtrack_proc_destroy.  Can be reused multiple times with
- * memtrack_proc_get.
- */
-struct memtrack_proc;
-
-/**
- * memtrack_proc_new
- *
- * Return a new handle to hold process memory stats.
- *
- * Returns NULL on error.
- */
-struct memtrack_proc *memtrack_proc_new(void);
-
-/**
- * memtrack_proc_destroy
- *
- * Free all memory associated with a process memory stats handle.
- */
-void memtrack_proc_destroy(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_get
- *
- * Fill a process memory stats handle with data about the given pid.  Can be
- * called on a handle that was just allocated with memtrack_proc_new,
- * or on a handle that has been previously passed to memtrack_proc_get
- * to replace the data with new data on the same or another process.  It is
- * expected that the second call on the same handle should not require
- * allocating any new memory.
- *
- * Returns 0 on success, -errno on error.
- */
-int memtrack_proc_get(struct memtrack_proc *p, pid_t pid);
-
-/**
- * memtrack_proc_graphics_total
- *
- * Return total amount of memory that has been allocated for use as window
- * buffers.  Does not differentiate between memory that has already been
- * accounted for by reading /proc/pid/smaps and memory that has not been
- * accounted for.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_graphics_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_graphics_pss
- *
- * Return total amount of memory that has been allocated for use as window
- * buffers, but has not already been accounted for by reading /proc/pid/smaps.
- * Memory that is shared across processes may already be divided by the
- * number of processes that share it (preferred), or may be charged in full to
- * every process that shares it, depending on the capabilities of the driver.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_graphics_pss(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_gl_total
- *
- * Same as memtrack_proc_graphics_total, but counts GL memory (which
- * should not overlap with graphics memory) instead of graphics memory.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_gl_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_gl_pss
- *
- * Same as memtrack_proc_graphics_total, but counts GL memory (which
- * should not overlap with graphics memory) instead of graphics memory.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_gl_pss(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_other_total
- *
- * Same as memtrack_proc_graphics_total, but counts miscellaneous memory
- * not tracked by gl or graphics calls above.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_other_total(struct memtrack_proc *p);
-
-/**
- * memtrack_proc_other_pss
- *
- * Same as memtrack_proc_graphics_total, but counts miscellaneous memory
- * not tracked by gl or graphics calls above.
- *
- * Returns non-negative size in bytes on success, -errno on error.
- */
-ssize_t memtrack_proc_other_pss(struct memtrack_proc *p);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/libmemtrack/memtrack.cpp b/libmemtrack/memtrack.cpp
deleted file mode 100644
index c5e74c1..0000000
--- a/libmemtrack/memtrack.cpp
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#define LOG_TAG "memtrack"
-#include <android/hardware/memtrack/1.0/IMemtrack.h>
-#include <memtrack/memtrack.h>
-
-#include <errno.h>
-#include <malloc.h>
-#include <vector>
-#include <string.h>
-#include <mutex>
-
-#include <log/log.h>
-
-using android::hardware::memtrack::V1_0::IMemtrack;
-using android::hardware::memtrack::V1_0::MemtrackType;
-using android::hardware::memtrack::V1_0::MemtrackRecord;
-using android::hardware::memtrack::V1_0::MemtrackFlag;
-using android::hardware::memtrack::V1_0::MemtrackStatus;
-using android::hardware::hidl_vec;
-using android::hardware::Return;
-
-struct memtrack_proc_type {
-    MemtrackType type;
-    std::vector<MemtrackRecord> records;
-};
-
-struct memtrack_proc {
-    pid_t pid;
-    memtrack_proc_type types[static_cast<int>(MemtrackType::NUM_TYPES)];
-};
-
-//TODO(b/31632518)
-static android::sp<IMemtrack> get_instance() {
-    static android::sp<IMemtrack> module = IMemtrack::getService();
-    if (module == nullptr) {
-        ALOGE("Couldn't load memtrack module");
-    }
-    return module;
-}
-
-memtrack_proc *memtrack_proc_new(void)
-{
-    return new memtrack_proc();
-}
-
-void memtrack_proc_destroy(memtrack_proc *p)
-{
-    delete(p);
-}
-
-static int memtrack_proc_get_type(memtrack_proc_type *t,
-        pid_t pid, MemtrackType type)
-{
-    int err = 0;
-    android::sp<IMemtrack> memtrack = get_instance();
-    if (memtrack == nullptr)
-        return -1;
-
-    Return<void> ret = memtrack->getMemory(pid, type,
-        [&t, &err](MemtrackStatus status, hidl_vec<MemtrackRecord> records) {
-            if (status != MemtrackStatus::SUCCESS) {
-                err = -1;
-                t->records.resize(0);
-            }
-            t->records.resize(records.size());
-            for (size_t i = 0; i < records.size(); i++) {
-                t->records[i].sizeInBytes = records[i].sizeInBytes;
-                t->records[i].flags = records[i].flags;
-            }
-    });
-    return ret.isOk() ? err : -1;
-}
-
-/* TODO: sanity checks on return values from HALs:
- *   make sure no records have invalid flags set
- *    - unknown flags
- *    - too many flags of a single category
- *    - missing ACCOUNTED/UNACCOUNTED
- *   make sure there are not overlapping SHARED and SHARED_PSS records
- */
-static int memtrack_proc_sanity_check(memtrack_proc* /*p*/)
-{
-    return 0;
-}
-
-int memtrack_proc_get(memtrack_proc *p, pid_t pid)
-{
-    if (!p) {
-        return -EINVAL;
-    }
-
-    p->pid = pid;
-    for (uint32_t i = 0; i < (uint32_t)MemtrackType::NUM_TYPES; i++) {
-        int ret = memtrack_proc_get_type(&p->types[i], pid, (MemtrackType)i);
-        if (ret != 0)
-           return ret;
-    }
-
-    return memtrack_proc_sanity_check(p);
-}
-
-static ssize_t memtrack_proc_sum(memtrack_proc *p,
-        const std::vector<MemtrackType>& types, uint32_t flags)
-{
-    ssize_t sum = 0;
-
-    for (size_t i = 0; i < types.size(); i++) {
-        memtrack_proc_type type = p->types[static_cast<int>(types[i])];
-        std::vector<MemtrackRecord> records = type.records;
-        for (size_t j = 0; j < records.size(); j++) {
-            if ((records[j].flags & flags) == flags) {
-                sum += records[j].sizeInBytes;
-            }
-        }
-    }
-
-    return sum;
-}
-
-ssize_t memtrack_proc_graphics_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = {MemtrackType::GRAPHICS};
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_graphics_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GRAPHICS };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
-
-ssize_t memtrack_proc_gl_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GL };
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_gl_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::GL };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
-
-ssize_t memtrack_proc_other_total(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::MULTIMEDIA,
-            MemtrackType::CAMERA, MemtrackType::OTHER };
-    return memtrack_proc_sum(p, types, 0);
-}
-
-ssize_t memtrack_proc_other_pss(memtrack_proc *p)
-{
-    std::vector<MemtrackType> types = { MemtrackType::MULTIMEDIA,
-            MemtrackType::CAMERA, MemtrackType::OTHER };
-    return memtrack_proc_sum(p, types,
-            (uint32_t)MemtrackFlag::SMAPS_UNACCOUNTED);
-}
diff --git a/libmemtrack/memtrack_test.cpp b/libmemtrack/memtrack_test.cpp
deleted file mode 100644
index aeeaf24..0000000
--- a/libmemtrack/memtrack_test.cpp
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-
-#include <filesystem>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/parseint.h>
-#include <android-base/stringprintf.h>
-#include <memtrack/memtrack.h>
-
-#define DIV_ROUND_UP(x, y) (((x) + (y)-1) / (y))
-
-static void getprocname(pid_t pid, std::string* name) {
-    std::string fname = ::android::base::StringPrintf("/proc/%d/cmdline", pid);
-    if (!::android::base::ReadFileToString(fname, name)) {
-        fprintf(stderr, "Failed to read cmdline from: %s\n", fname.c_str());
-        *name = "<unknown>";
-    }
-}
-
-int main(int /* argc */, char** /* argv */) {
-    int ret;
-    struct memtrack_proc* p;
-    std::vector<pid_t> pids;
-
-    p = memtrack_proc_new();
-    if (p == nullptr) {
-        fprintf(stderr, "failed to create memtrack process handle\n");
-        exit(EXIT_FAILURE);
-    }
-
-    for (auto& de : std::filesystem::directory_iterator("/proc")) {
-        if (!std::filesystem::is_directory(de.status())) {
-            continue;
-        }
-
-        pid_t pid;
-        if (!::android::base::ParseInt(de.path().filename().string(), &pid)) {
-            continue;
-        }
-        pids.emplace_back(pid);
-    }
-
-    for (auto& pid : pids) {
-        size_t v1;
-        size_t v2;
-        size_t v3;
-        size_t v4;
-        size_t v5;
-        size_t v6;
-        std::string cmdline;
-
-        getprocname(pid, &cmdline);
-
-        ret = memtrack_proc_get(p, pid);
-        if (ret) {
-            fprintf(stderr, "failed to get memory info for pid %d: %s (%d)\n", pid, strerror(-ret),
-                    ret);
-            continue;
-        }
-
-        v1 = DIV_ROUND_UP(memtrack_proc_graphics_total(p), 1024);
-        v2 = DIV_ROUND_UP(memtrack_proc_graphics_pss(p), 1024);
-        v3 = DIV_ROUND_UP(memtrack_proc_gl_total(p), 1024);
-        v4 = DIV_ROUND_UP(memtrack_proc_gl_pss(p), 1024);
-        v5 = DIV_ROUND_UP(memtrack_proc_other_total(p), 1024);
-        v6 = DIV_ROUND_UP(memtrack_proc_other_pss(p), 1024);
-
-        if (v1 | v2 | v3 | v4 | v5 | v6) {
-            fprintf(stdout, "%5d %6zu %6zu %6zu %6zu %6zu %6zu %s\n", pid, v1, v2, v3, v4, v5, v6,
-                    cmdline.c_str());
-        }
-    }
-
-    memtrack_proc_destroy(p);
-
-    return ret;
-}
diff --git a/libmemunreachable/Allocator.cpp b/libmemunreachable/Allocator.cpp
deleted file mode 100644
index 1eb7e98..0000000
--- a/libmemunreachable/Allocator.cpp
+++ /dev/null
@@ -1,468 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Header page:
-//
-// For minimum allocation size (8 bytes), bitmap can store used allocations for
-// up to 4032*8*8=258048, which is 256KiB minus the header page
-
-#include <assert.h>
-#include <stdlib.h>
-
-#include <sys/cdefs.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "LinkedList.h"
-
-namespace android {
-
-// runtime interfaces used:
-// abort
-// assert - fprintf + mmap
-// mmap
-// munmap
-// prctl
-
-constexpr size_t const_log2(size_t n, size_t p = 0) {
-  return (n <= 1) ? p : const_log2(n / 2, p + 1);
-}
-
-constexpr unsigned int div_round_up(unsigned int x, unsigned int y) {
-  return (x + y - 1) / y;
-}
-
-static constexpr size_t kPageSize = 4096;
-static constexpr size_t kChunkSize = 256 * 1024;
-static constexpr size_t kUsableChunkSize = kChunkSize - kPageSize;
-static constexpr size_t kMaxBucketAllocationSize = kChunkSize / 4;
-static constexpr size_t kMinBucketAllocationSize = 8;
-static constexpr unsigned int kNumBuckets =
-    const_log2(kMaxBucketAllocationSize) - const_log2(kMinBucketAllocationSize) + 1;
-static constexpr unsigned int kUsablePagesPerChunk = kUsableChunkSize / kPageSize;
-
-std::atomic<int> heap_count;
-
-class Chunk;
-
-class HeapImpl {
- public:
-  HeapImpl();
-  ~HeapImpl();
-  void* operator new(std::size_t count) noexcept;
-  void operator delete(void* ptr);
-
-  void* Alloc(size_t size);
-  void Free(void* ptr);
-  bool Empty();
-
-  void MoveToFullList(Chunk* chunk, int bucket_);
-  void MoveToFreeList(Chunk* chunk, int bucket_);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(HeapImpl);
-
-  LinkedList<Chunk*> free_chunks_[kNumBuckets];
-  LinkedList<Chunk*> full_chunks_[kNumBuckets];
-
-  void MoveToList(Chunk* chunk, LinkedList<Chunk*>* head);
-  void* MapAlloc(size_t size);
-  void MapFree(void* ptr);
-  void* AllocLocked(size_t size);
-  void FreeLocked(void* ptr);
-
-  struct MapAllocation {
-    void* ptr;
-    size_t size;
-    MapAllocation* next;
-  };
-  MapAllocation* map_allocation_list_;
-  std::mutex m_;
-};
-
-// Integer log 2, rounds down
-static inline unsigned int log2(size_t n) {
-  return 8 * sizeof(unsigned long long) - __builtin_clzll(n) - 1;
-}
-
-static inline unsigned int size_to_bucket(size_t size) {
-  if (size < kMinBucketAllocationSize) return kMinBucketAllocationSize;
-  return log2(size - 1) + 1 - const_log2(kMinBucketAllocationSize);
-}
-
-static inline size_t bucket_to_size(unsigned int bucket) {
-  return kMinBucketAllocationSize << bucket;
-}
-
-static void* MapAligned(size_t size, size_t align) {
-  const int prot = PROT_READ | PROT_WRITE;
-  const int flags = MAP_ANONYMOUS | MAP_PRIVATE;
-
-  size = (size + kPageSize - 1) & ~(kPageSize - 1);
-
-  // Over-allocate enough to align
-  size_t map_size = size + align - kPageSize;
-  if (map_size < size) {
-    return nullptr;
-  }
-
-  void* ptr = mmap(NULL, map_size, prot, flags, -1, 0);
-  if (ptr == MAP_FAILED) {
-    return nullptr;
-  }
-
-  size_t aligned_size = map_size;
-  void* aligned_ptr = ptr;
-
-  std::align(align, size, aligned_ptr, aligned_size);
-
-  // Trim beginning
-  if (aligned_ptr != ptr) {
-    ptrdiff_t extra = reinterpret_cast<uintptr_t>(aligned_ptr) - reinterpret_cast<uintptr_t>(ptr);
-    munmap(ptr, extra);
-    map_size -= extra;
-    ptr = aligned_ptr;
-  }
-
-  // Trim end
-  if (map_size != size) {
-    assert(map_size > size);
-    assert(ptr != NULL);
-    munmap(reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(ptr) + size), map_size - size);
-  }
-
-#if defined(PR_SET_VMA)
-  prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, reinterpret_cast<uintptr_t>(ptr), size,
-        "leak_detector_malloc");
-#endif
-
-  return ptr;
-}
-
-class Chunk {
- public:
-  static void* operator new(std::size_t count) noexcept;
-  static void operator delete(void* ptr);
-  Chunk(HeapImpl* heap, int bucket);
-  ~Chunk() {}
-
-  void* Alloc();
-  void Free(void* ptr);
-  void Purge();
-  bool Empty();
-
-  static Chunk* ptr_to_chunk(void* ptr) {
-    return reinterpret_cast<Chunk*>(reinterpret_cast<uintptr_t>(ptr) & ~(kChunkSize - 1));
-  }
-  static bool is_chunk(void* ptr) {
-    return (reinterpret_cast<uintptr_t>(ptr) & (kChunkSize - 1)) != 0;
-  }
-
-  unsigned int free_count() { return free_count_; }
-  HeapImpl* heap() { return heap_; }
-  LinkedList<Chunk*> node_;  // linked list sorted by minimum free count
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Chunk);
-  HeapImpl* heap_;
-  unsigned int bucket_;
-  unsigned int allocation_size_;    // size of allocations in chunk, min 8 bytes
-  unsigned int max_allocations_;    // maximum number of allocations in the chunk
-  unsigned int first_free_bitmap_;  // index into bitmap for first non-full entry
-  unsigned int free_count_;         // number of available allocations
-  unsigned int frees_since_purge_;  // number of calls to Free since last Purge
-
-  // bitmap of pages that have been dirtied
-  uint32_t dirty_pages_[div_round_up(kUsablePagesPerChunk, 32)];
-
-  // bitmap of free allocations.
-  uint32_t free_bitmap_[kUsableChunkSize / kMinBucketAllocationSize / 32];
-
-  char data_[0];
-
-  unsigned int ptr_to_n(void* ptr) {
-    ptrdiff_t offset = reinterpret_cast<uintptr_t>(ptr) - reinterpret_cast<uintptr_t>(data_);
-    return offset / allocation_size_;
-  }
-  void* n_to_ptr(unsigned int n) { return data_ + n * allocation_size_; }
-};
-static_assert(sizeof(Chunk) <= kPageSize, "header must fit in page");
-
-// Override new operator on chunk to use mmap to allocate kChunkSize
-void* Chunk::operator new(std::size_t count __attribute__((unused))) noexcept {
-  assert(count == sizeof(Chunk));
-  void* mem = MapAligned(kChunkSize, kChunkSize);
-  if (!mem) {
-    abort();  // throw std::bad_alloc;
-  }
-
-  return mem;
-}
-
-// Override new operator on chunk to use mmap to allocate kChunkSize
-void Chunk::operator delete(void* ptr) {
-  assert(reinterpret_cast<Chunk*>(ptr) == ptr_to_chunk(ptr));
-  munmap(ptr, kChunkSize);
-}
-
-Chunk::Chunk(HeapImpl* heap, int bucket)
-    : node_(this),
-      heap_(heap),
-      bucket_(bucket),
-      allocation_size_(bucket_to_size(bucket)),
-      max_allocations_(kUsableChunkSize / allocation_size_),
-      first_free_bitmap_(0),
-      free_count_(max_allocations_),
-      frees_since_purge_(0) {
-  memset(dirty_pages_, 0, sizeof(dirty_pages_));
-  memset(free_bitmap_, 0xff, sizeof(free_bitmap_));
-}
-
-bool Chunk::Empty() {
-  return free_count_ == max_allocations_;
-}
-
-void* Chunk::Alloc() {
-  assert(free_count_ > 0);
-
-  unsigned int i = first_free_bitmap_;
-  while (free_bitmap_[i] == 0) i++;
-  assert(i < arraysize(free_bitmap_));
-  unsigned int bit = __builtin_ffs(free_bitmap_[i]) - 1;
-  assert(free_bitmap_[i] & (1U << bit));
-  free_bitmap_[i] &= ~(1U << bit);
-  unsigned int n = i * 32 + bit;
-  assert(n < max_allocations_);
-
-  unsigned int page = n * allocation_size_ / kPageSize;
-  assert(page / 32 < arraysize(dirty_pages_));
-  dirty_pages_[page / 32] |= 1U << (page % 32);
-
-  free_count_--;
-  if (free_count_ == 0) {
-    heap_->MoveToFullList(this, bucket_);
-  }
-
-  return n_to_ptr(n);
-}
-
-void Chunk::Free(void* ptr) {
-  assert(is_chunk(ptr));
-  assert(ptr_to_chunk(ptr) == this);
-
-  unsigned int n = ptr_to_n(ptr);
-  unsigned int i = n / 32;
-  unsigned int bit = n % 32;
-
-  assert(i < arraysize(free_bitmap_));
-  assert(!(free_bitmap_[i] & (1U << bit)));
-  free_bitmap_[i] |= 1U << bit;
-  free_count_++;
-
-  if (i < first_free_bitmap_) {
-    first_free_bitmap_ = i;
-  }
-
-  if (free_count_ == 1) {
-    heap_->MoveToFreeList(this, bucket_);
-  } else {
-    // TODO(ccross): move down free list if necessary
-  }
-
-  if (frees_since_purge_++ * allocation_size_ > 16 * kPageSize) {
-    Purge();
-  }
-}
-
-void Chunk::Purge() {
-  frees_since_purge_ = 0;
-
-  // unsigned int allocsPerPage = kPageSize / allocation_size_;
-}
-
-// Override new operator on HeapImpl to use mmap to allocate a page
-void* HeapImpl::operator new(std::size_t count __attribute__((unused))) noexcept {
-  assert(count == sizeof(HeapImpl));
-  void* mem = MapAligned(kPageSize, kPageSize);
-  if (!mem) {
-    abort();  // throw std::bad_alloc;
-  }
-
-  heap_count++;
-  return mem;
-}
-
-void HeapImpl::operator delete(void* ptr) {
-  munmap(ptr, kPageSize);
-}
-
-HeapImpl::HeapImpl() : free_chunks_(), full_chunks_(), map_allocation_list_(NULL) {}
-
-bool HeapImpl::Empty() {
-  for (unsigned int i = 0; i < kNumBuckets; i++) {
-    for (LinkedList<Chunk*>* it = free_chunks_[i].next(); it->data() != NULL; it = it->next()) {
-      if (!it->data()->Empty()) {
-        return false;
-      }
-    }
-    for (LinkedList<Chunk*>* it = full_chunks_[i].next(); it->data() != NULL; it = it->next()) {
-      if (!it->data()->Empty()) {
-        return false;
-      }
-    }
-  }
-
-  return true;
-}
-
-HeapImpl::~HeapImpl() {
-  for (unsigned int i = 0; i < kNumBuckets; i++) {
-    while (!free_chunks_[i].empty()) {
-      Chunk* chunk = free_chunks_[i].next()->data();
-      chunk->node_.remove();
-      delete chunk;
-    }
-    while (!full_chunks_[i].empty()) {
-      Chunk* chunk = full_chunks_[i].next()->data();
-      chunk->node_.remove();
-      delete chunk;
-    }
-  }
-}
-
-void* HeapImpl::Alloc(size_t size) {
-  std::lock_guard<std::mutex> lk(m_);
-  return AllocLocked(size);
-}
-
-void* HeapImpl::AllocLocked(size_t size) {
-  if (size > kMaxBucketAllocationSize) {
-    return MapAlloc(size);
-  }
-  int bucket = size_to_bucket(size);
-  if (free_chunks_[bucket].empty()) {
-    Chunk* chunk = new Chunk(this, bucket);
-    free_chunks_[bucket].insert(chunk->node_);
-  }
-  return free_chunks_[bucket].next()->data()->Alloc();
-}
-
-void HeapImpl::Free(void* ptr) {
-  std::lock_guard<std::mutex> lk(m_);
-  FreeLocked(ptr);
-}
-
-void HeapImpl::FreeLocked(void* ptr) {
-  if (!Chunk::is_chunk(ptr)) {
-    HeapImpl::MapFree(ptr);
-  } else {
-    Chunk* chunk = Chunk::ptr_to_chunk(ptr);
-    assert(chunk->heap() == this);
-    chunk->Free(ptr);
-  }
-}
-
-void* HeapImpl::MapAlloc(size_t size) {
-  size = (size + kPageSize - 1) & ~(kPageSize - 1);
-
-  MapAllocation* allocation = reinterpret_cast<MapAllocation*>(AllocLocked(sizeof(MapAllocation)));
-  void* ptr = MapAligned(size, kChunkSize);
-  if (!ptr) {
-    FreeLocked(allocation);
-    abort();  // throw std::bad_alloc;
-  }
-  allocation->ptr = ptr;
-  allocation->size = size;
-  allocation->next = map_allocation_list_;
-  map_allocation_list_ = allocation;
-
-  return ptr;
-}
-
-void HeapImpl::MapFree(void* ptr) {
-  MapAllocation** allocation = &map_allocation_list_;
-  while (*allocation && (*allocation)->ptr != ptr) allocation = &(*allocation)->next;
-
-  assert(*allocation != nullptr);
-
-  munmap((*allocation)->ptr, (*allocation)->size);
-  FreeLocked(*allocation);
-
-  *allocation = (*allocation)->next;
-}
-
-void HeapImpl::MoveToFreeList(Chunk* chunk, int bucket) {
-  MoveToList(chunk, &free_chunks_[bucket]);
-}
-
-void HeapImpl::MoveToFullList(Chunk* chunk, int bucket) {
-  MoveToList(chunk, &full_chunks_[bucket]);
-}
-
-void HeapImpl::MoveToList(Chunk* chunk, LinkedList<Chunk*>* head) {
-  // Remove from old list
-  chunk->node_.remove();
-
-  LinkedList<Chunk*>* node = head;
-  // Insert into new list, sorted by lowest free count
-  while (node->next() != head && node->data() != nullptr &&
-         node->data()->free_count() < chunk->free_count())
-    node = node->next();
-
-  node->insert(chunk->node_);
-}
-
-Heap::Heap() {
-  // HeapImpl overloads the operator new in order to mmap itself instead of
-  // allocating with new.
-  // Can't use a shared_ptr to store the result because shared_ptr needs to
-  // allocate, and Allocator<T> is still being constructed.
-  impl_ = new HeapImpl();
-  owns_impl_ = true;
-}
-
-Heap::~Heap() {
-  if (owns_impl_) {
-    delete impl_;
-  }
-}
-
-void* Heap::allocate(size_t size) {
-  return impl_->Alloc(size);
-}
-
-void Heap::deallocate(void* ptr) {
-  impl_->Free(ptr);
-}
-
-void Heap::deallocate(HeapImpl* impl, void* ptr) {
-  impl->Free(ptr);
-}
-
-bool Heap::empty() {
-  return impl_->Empty();
-}
-
-}  // namespace android
diff --git a/libmemunreachable/Allocator.h b/libmemunreachable/Allocator.h
deleted file mode 100644
index 837a12b..0000000
--- a/libmemunreachable/Allocator.h
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_ALLOCATOR_H_
-#define LIBMEMUNREACHABLE_ALLOCATOR_H_
-
-#include <atomic>
-#include <cstddef>
-#include <functional>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-namespace android {
-
-extern std::atomic<int> heap_count;
-
-class HeapImpl;
-
-template <typename T>
-class Allocator;
-
-// Non-templated class that implements wraps HeapImpl to keep
-// implementation out of the header file
-class Heap {
- public:
-  Heap();
-  ~Heap();
-
-  // Copy constructor that does not take ownership of impl_
-  Heap(const Heap& other) : impl_(other.impl_), owns_impl_(false) {}
-
-  // Assignment disabled
-  Heap& operator=(const Heap&) = delete;
-
-  // Allocate size bytes
-  void* allocate(size_t size);
-
-  // Deallocate allocation returned by allocate
-  void deallocate(void*);
-
-  bool empty();
-
-  static void deallocate(HeapImpl* impl, void* ptr);
-
-  // Allocate a class of type T
-  template <class T>
-  T* allocate() {
-    return reinterpret_cast<T*>(allocate(sizeof(T)));
-  }
-
-  // Comparators, copied objects will be equal
-  bool operator==(const Heap& other) const { return impl_ == other.impl_; }
-  bool operator!=(const Heap& other) const { return !(*this == other); }
-
-  // std::unique_ptr wrapper that allocates using allocate and deletes using
-  // deallocate
-  template <class T>
-  using unique_ptr = std::unique_ptr<T, std::function<void(void*)>>;
-
-  template <class T, class... Args>
-  unique_ptr<T> make_unique(Args&&... args) {
-    HeapImpl* impl = impl_;
-    return unique_ptr<T>(new (allocate<T>()) T(std::forward<Args>(args)...), [impl](void* ptr) {
-      reinterpret_cast<T*>(ptr)->~T();
-      deallocate(impl, ptr);
-    });
-  }
-
-  // std::unique_ptr wrapper that allocates using allocate and deletes using
-  // deallocate
-  template <class T>
-  using shared_ptr = std::shared_ptr<T>;
-
-  template <class T, class... Args>
-  shared_ptr<T> make_shared(Args&&... args);
-
- protected:
-  HeapImpl* impl_;
-  bool owns_impl_;
-};
-
-// STLAllocator implements the std allocator interface on top of a Heap
-template <typename T>
-class STLAllocator {
- public:
-  using value_type = T;
-  ~STLAllocator() {}
-
-  // Construct an STLAllocator on top of a Heap
-  STLAllocator(const Heap& heap)
-      :  // NOLINT, implicit
-        heap_(heap) {}
-
-  // Rebind an STLAllocator from an another STLAllocator
-  template <typename U>
-  STLAllocator(const STLAllocator<U>& other)
-      :  // NOLINT, implicit
-        heap_(other.heap_) {}
-
-  STLAllocator(const STLAllocator&) = default;
-  STLAllocator<T>& operator=(const STLAllocator<T>&) = default;
-
-  T* allocate(std::size_t n) { return reinterpret_cast<T*>(heap_.allocate(n * sizeof(T))); }
-
-  void deallocate(T* ptr, std::size_t) { heap_.deallocate(ptr); }
-
-  template <typename U>
-  bool operator==(const STLAllocator<U>& other) const {
-    return heap_ == other.heap_;
-  }
-  template <typename U>
-  inline bool operator!=(const STLAllocator<U>& other) const {
-    return !(this == other);
-  }
-
-  template <typename U>
-  friend class STLAllocator;
-
- protected:
-  Heap heap_;
-};
-
-// Allocator extends STLAllocator with some convenience methods for allocating
-// a single object and for constructing unique_ptr and shared_ptr objects with
-// appropriate deleters.
-template <class T>
-class Allocator : public STLAllocator<T> {
- public:
-  ~Allocator() {}
-
-  Allocator(const Heap& other)
-      :  // NOLINT, implicit
-        STLAllocator<T>(other) {}
-
-  template <typename U>
-  Allocator(const STLAllocator<U>& other)
-      :  // NOLINT, implicit
-        STLAllocator<T>(other) {}
-
-  Allocator(const Allocator&) = default;
-  Allocator<T>& operator=(const Allocator<T>&) = default;
-
-  using STLAllocator<T>::allocate;
-  using STLAllocator<T>::deallocate;
-  using STLAllocator<T>::heap_;
-
-  T* allocate() { return STLAllocator<T>::allocate(1); }
-  void deallocate(void* ptr) { heap_.deallocate(ptr); }
-
-  using shared_ptr = Heap::shared_ptr<T>;
-
-  template <class... Args>
-  shared_ptr make_shared(Args&&... args) {
-    return heap_.template make_shared<T>(std::forward<Args>(args)...);
-  }
-
-  using unique_ptr = Heap::unique_ptr<T>;
-
-  template <class... Args>
-  unique_ptr make_unique(Args&&... args) {
-    return heap_.template make_unique<T>(std::forward<Args>(args)...);
-  }
-};
-
-// std::unique_ptr wrapper that allocates using allocate and deletes using
-// deallocate.  Implemented outside class definition in order to pass
-// Allocator<T> to shared_ptr.
-template <class T, class... Args>
-inline Heap::shared_ptr<T> Heap::make_shared(Args&&... args) {
-  return std::allocate_shared<T, Allocator<T>, Args...>(Allocator<T>(*this),
-                                                        std::forward<Args>(args)...);
-}
-
-namespace allocator {
-
-template <class T>
-using vector = std::vector<T, Allocator<T>>;
-
-template <class T>
-using list = std::list<T, Allocator<T>>;
-
-template <class Key, class T, class Compare = std::less<Key>>
-using map = std::map<Key, T, Compare, Allocator<std::pair<const Key, T>>>;
-
-template <class Key, class T, class Hash = std::hash<Key>, class KeyEqual = std::equal_to<Key>>
-using unordered_map =
-    std::unordered_map<Key, T, Hash, KeyEqual, Allocator<std::pair<const Key, T>>>;
-
-template <class Key, class Hash = std::hash<Key>, class KeyEqual = std::equal_to<Key>>
-using unordered_set = std::unordered_set<Key, Hash, KeyEqual, Allocator<Key>>;
-
-template <class Key, class Compare = std::less<Key>>
-using set = std::set<Key, Compare, Allocator<Key>>;
-
-using string = std::basic_string<char, std::char_traits<char>, Allocator<char>>;
-}
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/Android.bp b/libmemunreachable/Android.bp
deleted file mode 100644
index f20df19..0000000
--- a/libmemunreachable/Android.bp
+++ /dev/null
@@ -1,120 +0,0 @@
-cc_defaults {
-    name: "libmemunreachable_defaults",
-
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-    shared_libs: [
-        "libbase",
-    ],
-
-    target: {
-        android: {
-            static_libs: ["libasync_safe"],
-        },
-        host: {
-            shared_libs: ["liblog"],
-        },
-    },
-}
-
-cc_library {
-    name: "libmemunreachable",
-    vendor_available: true,
-    defaults: ["libmemunreachable_defaults"],
-    srcs: [
-        "Allocator.cpp",
-        "Binder.cpp",
-        "HeapWalker.cpp",
-        "LeakFolding.cpp",
-        "LeakPipe.cpp",
-        "MemUnreachable.cpp",
-        "ProcessMappings.cpp",
-        "PtracerThread.cpp",
-        "ThreadCapture.cpp",
-    ],
-
-    static_libs: [
-        "libc_malloc_debug_backtrace",
-        "libprocinfo",
-    ],
-    // Only need this for arm since libc++ uses its own unwind code that
-    // doesn't mix with the other default unwind code.
-    arch: {
-        arm: {
-            static_libs: ["libunwind_llvm"],
-        },
-    },
-    export_include_dirs: ["include"],
-    local_include_dirs: ["include"],
-    version_script: "libmemunreachable.map",
-}
-
-// Integration test that runs against the public API of libmemunreachable
-cc_test {
-    name: "memunreachable_test",
-    defaults: ["libmemunreachable_defaults"],
-    srcs: [
-        "tests/MemUnreachable_test.cpp",
-    ],
-    shared_libs: ["libmemunreachable"],
-
-    test_suites: ["device-tests"],
-}
-
-cc_test {
-    name: "memunreachable_unit_test",
-    defaults: ["libmemunreachable_defaults"],
-    host_supported: true,
-    srcs: [
-        "tests/Allocator_test.cpp",
-        "tests/HeapWalker_test.cpp",
-        "tests/LeakFolding_test.cpp",
-    ],
-
-    target: {
-        android: {
-            srcs: [
-                "tests/DisableMalloc_test.cpp",
-                "tests/MemUnreachable_test.cpp",
-                "tests/ThreadCapture_test.cpp",
-            ],
-            static_libs: [
-                "libmemunreachable",
-                "libc_malloc_debug_backtrace",
-            ],
-        },
-        host: {
-            srcs: [
-                "Allocator.cpp",
-                "HeapWalker.cpp",
-                "LeakFolding.cpp",
-                "tests/HostMallocStub.cpp",
-            ],
-        },
-        darwin: {
-            enabled: false,
-        },
-    },
-
-    test_suites: ["device-tests"],
-}
-
-cc_test {
-    name: "memunreachable_binder_test",
-    defaults: ["libmemunreachable_defaults"],
-    require_root: true,
-
-    srcs: [
-        "tests/Binder_test.cpp",
-    ],
-    static_libs: ["libmemunreachable"],
-    shared_libs: [
-        "libbinder",
-        "libhidlbase",
-        "libutils",
-    ],
-    test_suites: ["device-tests"],
-}
diff --git a/libmemunreachable/Binder.cpp b/libmemunreachable/Binder.cpp
deleted file mode 100644
index 60512a3..0000000
--- a/libmemunreachable/Binder.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/cdefs.h>
-#include <unistd.h>
-
-#include <functional>
-
-#include "Binder.h"
-#include "log.h"
-
-__BEGIN_DECLS
-
-// Weak undefined references to the symbols in libbinder and libhwbinder
-// so that libmemunreachable can call them in processes that have them
-// loaded without requiring libmemunreachable to have dependencies on them.
-ssize_t __attribute__((weak)) getBinderKernelReferences(size_t, uintptr_t*);
-ssize_t __attribute__((weak)) getHWBinderKernelReferences(size_t, uintptr_t*);
-
-__END_DECLS
-
-namespace android {
-
-static bool BinderReferencesToVector(allocator::vector<uintptr_t>& refs,
-                                     std::function<ssize_t(size_t, uintptr_t*)> fn) {
-  if (fn == nullptr) {
-    return true;
-  }
-
-  size_t size = refs.size();
-
-  do {
-    refs.resize(size);
-
-    ssize_t ret = fn(refs.size(), refs.data());
-    if (ret < 0) {
-      return false;
-    }
-
-    size = ret;
-  } while (size > refs.size());
-
-  refs.resize(size);
-  return true;
-}
-
-bool BinderReferences(allocator::vector<uintptr_t>& refs) {
-  refs.clear();
-
-  allocator::vector<uintptr_t> binder_refs{refs.get_allocator()};
-  if (BinderReferencesToVector(refs, getBinderKernelReferences)) {
-    refs.insert(refs.end(), binder_refs.begin(), binder_refs.end());
-  } else {
-    MEM_ALOGE("getBinderKernelReferences failed");
-  }
-
-  allocator::vector<uintptr_t> hwbinder_refs{refs.get_allocator()};
-  if (BinderReferencesToVector(hwbinder_refs, getHWBinderKernelReferences)) {
-    refs.insert(refs.end(), hwbinder_refs.begin(), hwbinder_refs.end());
-  } else {
-    MEM_ALOGE("getHWBinderKernelReferences failed");
-  }
-
-  return true;
-}
-
-}  // namespace android
diff --git a/libmemunreachable/HeapWalker.cpp b/libmemunreachable/HeapWalker.cpp
deleted file mode 100644
index 7cae048..0000000
--- a/libmemunreachable/HeapWalker.cpp
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <inttypes.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <map>
-#include <utility>
-
-#include "Allocator.h"
-#include "HeapWalker.h"
-#include "LeakFolding.h"
-#include "ScopedSignalHandler.h"
-#include "log.h"
-
-namespace android {
-
-bool HeapWalker::Allocation(uintptr_t begin, uintptr_t end) {
-  if (end == begin) {
-    end = begin + 1;
-  }
-  Range range{begin, end};
-  if (valid_mappings_range_.end != 0 &&
-      (begin < valid_mappings_range_.begin || end > valid_mappings_range_.end)) {
-    MEM_LOG_ALWAYS_FATAL("allocation %p-%p is outside mapping range %p-%p",
-                         reinterpret_cast<void*>(begin), reinterpret_cast<void*>(end),
-                         reinterpret_cast<void*>(valid_mappings_range_.begin),
-                         reinterpret_cast<void*>(valid_mappings_range_.end));
-  }
-  auto inserted = allocations_.insert(std::pair<Range, AllocationInfo>(range, AllocationInfo{}));
-  if (inserted.second) {
-    valid_allocations_range_.begin = std::min(valid_allocations_range_.begin, begin);
-    valid_allocations_range_.end = std::max(valid_allocations_range_.end, end);
-    allocation_bytes_ += range.size();
-    return true;
-  } else {
-    Range overlap = inserted.first->first;
-    if (overlap != range) {
-      MEM_ALOGE("range %p-%p overlaps with existing range %p-%p", reinterpret_cast<void*>(begin),
-                reinterpret_cast<void*>(end), reinterpret_cast<void*>(overlap.begin),
-                reinterpret_cast<void*>(overlap.end));
-    }
-    return false;
-  }
-}
-
-// Sanitizers may consider certain memory inaccessible through certain pointers.
-// With MTE this will need to use unchecked instructions or disable tag checking globally.
-static uintptr_t ReadWordAtAddressUnsafe(uintptr_t word_ptr)
-    __attribute__((no_sanitize("address", "hwaddress"))) {
-  return *reinterpret_cast<uintptr_t*>(word_ptr);
-}
-
-bool HeapWalker::WordContainsAllocationPtr(uintptr_t word_ptr, Range* range, AllocationInfo** info) {
-  walking_ptr_ = word_ptr;
-  // This access may segfault if the process under test has done something strange,
-  // for example mprotect(PROT_NONE) on a native heap page.  If so, it will be
-  // caught and handled by mmaping a zero page over the faulting page.
-  uintptr_t value = ReadWordAtAddressUnsafe(word_ptr);
-  walking_ptr_ = 0;
-  if (value >= valid_allocations_range_.begin && value < valid_allocations_range_.end) {
-    AllocationMap::iterator it = allocations_.find(Range{value, value + 1});
-    if (it != allocations_.end()) {
-      *range = it->first;
-      *info = &it->second;
-      return true;
-    }
-  }
-  return false;
-}
-
-void HeapWalker::RecurseRoot(const Range& root) {
-  allocator::vector<Range> to_do(1, root, allocator_);
-  while (!to_do.empty()) {
-    Range range = to_do.back();
-    to_do.pop_back();
-
-    walking_range_ = range;
-    ForEachPtrInRange(range, [&](Range& ref_range, AllocationInfo* ref_info) {
-      if (!ref_info->referenced_from_root) {
-        ref_info->referenced_from_root = true;
-        to_do.push_back(ref_range);
-      }
-    });
-    walking_range_ = Range{0, 0};
-  }
-}
-
-void HeapWalker::Mapping(uintptr_t begin, uintptr_t end) {
-  valid_mappings_range_.begin = std::min(valid_mappings_range_.begin, begin);
-  valid_mappings_range_.end = std::max(valid_mappings_range_.end, end);
-}
-
-void HeapWalker::Root(uintptr_t begin, uintptr_t end) {
-  roots_.push_back(Range{begin, end});
-}
-
-void HeapWalker::Root(const allocator::vector<uintptr_t>& vals) {
-  root_vals_.insert(root_vals_.end(), vals.begin(), vals.end());
-}
-
-size_t HeapWalker::Allocations() {
-  return allocations_.size();
-}
-
-size_t HeapWalker::AllocationBytes() {
-  return allocation_bytes_;
-}
-
-bool HeapWalker::DetectLeaks() {
-  // Recursively walk pointers from roots to mark referenced allocations
-  for (auto it = roots_.begin(); it != roots_.end(); it++) {
-    RecurseRoot(*it);
-  }
-
-  Range vals;
-  vals.begin = reinterpret_cast<uintptr_t>(root_vals_.data());
-  vals.end = vals.begin + root_vals_.size() * sizeof(uintptr_t);
-
-  RecurseRoot(vals);
-
-  if (segv_page_count_ > 0) {
-    MEM_ALOGE("%zu pages skipped due to segfaults", segv_page_count_);
-  }
-
-  return true;
-}
-
-bool HeapWalker::Leaked(allocator::vector<Range>& leaked, size_t limit, size_t* num_leaks_out,
-                        size_t* leak_bytes_out) {
-  leaked.clear();
-
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  for (auto it = allocations_.begin(); it != allocations_.end(); it++) {
-    if (!it->second.referenced_from_root) {
-      num_leaks++;
-      leak_bytes += it->first.end - it->first.begin;
-    }
-  }
-
-  size_t n = 0;
-  for (auto it = allocations_.begin(); it != allocations_.end(); it++) {
-    if (!it->second.referenced_from_root) {
-      if (n++ < limit) {
-        leaked.push_back(it->first);
-      }
-    }
-  }
-
-  if (num_leaks_out) {
-    *num_leaks_out = num_leaks;
-  }
-  if (leak_bytes_out) {
-    *leak_bytes_out = leak_bytes;
-  }
-
-  return true;
-}
-
-static bool MapOverPage(void* addr) {
-  const size_t page_size = sysconf(_SC_PAGE_SIZE);
-  void* page = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(addr) & ~(page_size - 1));
-
-  void* ret = mmap(page, page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
-  if (ret == MAP_FAILED) {
-    MEM_ALOGE("failed to map page at %p: %s", page, strerror(errno));
-    return false;
-  }
-
-  return true;
-}
-
-void HeapWalker::HandleSegFault(ScopedSignalHandler& handler, int signal, siginfo_t* si,
-                                void* /*uctx*/) {
-  uintptr_t addr = reinterpret_cast<uintptr_t>(si->si_addr);
-  if (addr != walking_ptr_) {
-    handler.reset();
-    return;
-  }
-  if (!segv_logged_) {
-    MEM_ALOGW("failed to read page at %p, signal %d", si->si_addr, signal);
-    if (walking_range_.begin != 0U) {
-      MEM_ALOGW("while walking range %p-%p", reinterpret_cast<void*>(walking_range_.begin),
-                reinterpret_cast<void*>(walking_range_.end));
-    }
-    segv_logged_ = true;
-  }
-  segv_page_count_++;
-  if (!MapOverPage(si->si_addr)) {
-    handler.reset();
-  }
-}
-
-Allocator<ScopedSignalHandler::SignalFnMap>::unique_ptr ScopedSignalHandler::handler_map_;
-
-}  // namespace android
diff --git a/libmemunreachable/HeapWalker.h b/libmemunreachable/HeapWalker.h
deleted file mode 100644
index f00bcca..0000000
--- a/libmemunreachable/HeapWalker.h
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_HEAP_WALKER_H_
-#define LIBMEMUNREACHABLE_HEAP_WALKER_H_
-
-#include <signal.h>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "ScopedSignalHandler.h"
-#include "Tarjan.h"
-
-namespace android {
-
-// A range [begin, end)
-struct Range {
-  uintptr_t begin;
-  uintptr_t end;
-
-  size_t size() const { return end - begin; };
-  bool operator==(const Range& other) const {
-    return this->begin == other.begin && this->end == other.end;
-  }
-  bool operator!=(const Range& other) const { return !(*this == other); }
-};
-
-// Comparator for Ranges that returns equivalence for overlapping ranges
-struct compare_range {
-  bool operator()(const Range& a, const Range& b) const { return a.end <= b.begin; }
-};
-
-class HeapWalker {
- public:
-  explicit HeapWalker(Allocator<HeapWalker> allocator)
-      : allocator_(allocator),
-        allocations_(allocator),
-        allocation_bytes_(0),
-        roots_(allocator),
-        root_vals_(allocator),
-        sigsegv_handler_(allocator),
-        sigbus_handler_(allocator),
-        walking_ptr_(0),
-        walking_range_{0, 0},
-        segv_logged_(false),
-        segv_page_count_(0) {
-    valid_allocations_range_.end = 0;
-    valid_allocations_range_.begin = ~valid_allocations_range_.end;
-    valid_mappings_range_.end = 0;
-    valid_mappings_range_.begin = ~valid_allocations_range_.end;
-
-    sigsegv_handler_.install(
-        SIGSEGV, [=](ScopedSignalHandler& handler, int signal, siginfo_t* siginfo, void* uctx) {
-          this->HandleSegFault(handler, signal, siginfo, uctx);
-        });
-    sigbus_handler_.install(
-        SIGBUS, [=](ScopedSignalHandler& handler, int signal, siginfo_t* siginfo, void* uctx) {
-          this->HandleSegFault(handler, signal, siginfo, uctx);
-        });
-  }
-
-  ~HeapWalker() {}
-  bool Allocation(uintptr_t begin, uintptr_t end);
-  void Mapping(uintptr_t begin, uintptr_t end);
-  void Root(uintptr_t begin, uintptr_t end);
-  void Root(const allocator::vector<uintptr_t>& vals);
-
-  bool DetectLeaks();
-
-  bool Leaked(allocator::vector<Range>&, size_t limit, size_t* num_leaks, size_t* leak_bytes);
-  size_t Allocations();
-  size_t AllocationBytes();
-
-  template <class F>
-  void ForEachPtrInRange(const Range& range, F&& f);
-
-  template <class F>
-  void ForEachAllocation(F&& f);
-
-  struct AllocationInfo {
-    bool referenced_from_root;
-  };
-
- private:
-  void RecurseRoot(const Range& root);
-  bool WordContainsAllocationPtr(uintptr_t ptr, Range* range, AllocationInfo** info);
-  void HandleSegFault(ScopedSignalHandler&, int, siginfo_t*, void*);
-
-  DISALLOW_COPY_AND_ASSIGN(HeapWalker);
-  Allocator<HeapWalker> allocator_;
-  using AllocationMap = allocator::map<Range, AllocationInfo, compare_range>;
-  AllocationMap allocations_;
-  size_t allocation_bytes_;
-  Range valid_allocations_range_;
-  Range valid_mappings_range_;
-
-  allocator::vector<Range> roots_;
-  allocator::vector<uintptr_t> root_vals_;
-
-  ScopedSignalHandler sigsegv_handler_;
-  ScopedSignalHandler sigbus_handler_;
-  volatile uintptr_t walking_ptr_;
-  Range walking_range_;
-  bool segv_logged_;
-  size_t segv_page_count_;
-};
-
-template <class F>
-inline void HeapWalker::ForEachPtrInRange(const Range& range, F&& f) {
-  uintptr_t begin = (range.begin + (sizeof(uintptr_t) - 1)) & ~(sizeof(uintptr_t) - 1);
-  // TODO(ccross): we might need to consider a pointer to the end of a buffer
-  // to be inside the buffer, which means the common case of a pointer to the
-  // beginning of a buffer may keep two ranges live.
-  for (uintptr_t i = begin; i < range.end; i += sizeof(uintptr_t)) {
-    Range ref_range;
-    AllocationInfo* ref_info;
-    if (WordContainsAllocationPtr(i, &ref_range, &ref_info)) {
-      f(ref_range, ref_info);
-    }
-  }
-}
-
-template <class F>
-inline void HeapWalker::ForEachAllocation(F&& f) {
-  for (auto& it : allocations_) {
-    const Range& range = it.first;
-    HeapWalker::AllocationInfo& allocation = it.second;
-    f(range, allocation);
-  }
-}
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/Leak.h b/libmemunreachable/Leak.h
deleted file mode 100644
index de64b64..0000000
--- a/libmemunreachable/Leak.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_H_
-#define LIBMEMUNREACHABLE_LEAK_H_
-
-#include <functional>
-#include <vector>
-
-#include "memunreachable/memunreachable.h"
-
-// Custom std::hash specialization so that Leak::Backtrace can be used
-// as a key in std::unordered_map.
-namespace std {
-
-template <>
-struct hash<android::Leak::Backtrace> {
-  std::size_t operator()(const android::Leak::Backtrace& key) const {
-    std::size_t seed = 0;
-
-    hash_combine(seed, key.num_frames);
-    for (size_t i = 0; i < key.num_frames; i++) {
-      hash_combine(seed, key.frames[i]);
-    }
-
-    return seed;
-  }
-
- private:
-  template <typename T>
-  inline void hash_combine(std::size_t& seed, const T& v) const {
-    std::hash<T> hasher;
-    seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
-  }
-};
-
-}  // namespace std
-
-namespace android {
-
-static bool operator==(const Leak::Backtrace& lhs, const Leak::Backtrace& rhs) {
-  return (lhs.num_frames == rhs.num_frames) &&
-         memcmp(lhs.frames, rhs.frames, lhs.num_frames * sizeof(lhs.frames[0])) == 0;
-}
-}
-
-#endif
diff --git a/libmemunreachable/LeakFolding.cpp b/libmemunreachable/LeakFolding.cpp
deleted file mode 100644
index 074dc48..0000000
--- a/libmemunreachable/LeakFolding.cpp
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <inttypes.h>
-
-#include "Allocator.h"
-#include "HeapWalker.h"
-#include "LeakFolding.h"
-#include "Tarjan.h"
-#include "log.h"
-
-namespace android {
-
-// Converts possibly cyclic graph of leaks to a DAG by combining
-// strongly-connected components into a object, stored in the scc pointer
-// of each node in the component.
-void LeakFolding::ComputeDAG() {
-  SCCList<LeakInfo> scc_list{allocator_};
-  Tarjan(leak_graph_, scc_list);
-
-  Allocator<SCCInfo> scc_allocator = allocator_;
-
-  for (auto& scc_nodes : scc_list) {
-    Allocator<SCCInfo>::unique_ptr leak_scc;
-    leak_scc = scc_allocator.make_unique(scc_allocator);
-
-    for (auto& node : scc_nodes) {
-      node->ptr->scc = leak_scc.get();
-      leak_scc->count++;
-      leak_scc->size += node->ptr->range.size();
-    }
-
-    leak_scc_.emplace_back(std::move(leak_scc));
-  }
-
-  for (auto& it : leak_map_) {
-    LeakInfo& leak = it.second;
-    for (auto& ref : leak.node.references_out) {
-      if (leak.scc != ref->ptr->scc) {
-        leak.scc->node.Edge(&ref->ptr->scc->node);
-      }
-    }
-  }
-}
-
-void LeakFolding::AccumulateLeaks(SCCInfo* dominator) {
-  std::function<void(SCCInfo*)> walk([&](SCCInfo* scc) {
-    if (scc->accumulator != dominator) {
-      scc->accumulator = dominator;
-      dominator->cuumulative_size += scc->size;
-      dominator->cuumulative_count += scc->count;
-      scc->node.Foreach([&](SCCInfo* ref) { walk(ref); });
-    }
-  });
-  walk(dominator);
-}
-
-bool LeakFolding::FoldLeaks() {
-  Allocator<LeakInfo> leak_allocator = allocator_;
-
-  // Find all leaked allocations insert them into leak_map_ and leak_graph_
-  heap_walker_.ForEachAllocation([&](const Range& range, HeapWalker::AllocationInfo& allocation) {
-    if (!allocation.referenced_from_root) {
-      auto it = leak_map_.emplace(std::piecewise_construct, std::forward_as_tuple(range),
-                                  std::forward_as_tuple(range, allocator_));
-      LeakInfo& leak = it.first->second;
-      leak_graph_.push_back(&leak.node);
-    }
-  });
-
-  // Find references between leaked allocations and connect them in leak_graph_
-  for (auto& it : leak_map_) {
-    LeakInfo& leak = it.second;
-    heap_walker_.ForEachPtrInRange(leak.range,
-                                   [&](Range& ptr_range, HeapWalker::AllocationInfo* ptr_info) {
-                                     if (!ptr_info->referenced_from_root) {
-                                       LeakInfo* ptr_leak = &leak_map_.at(ptr_range);
-                                       leak.node.Edge(&ptr_leak->node);
-                                     }
-                                   });
-  }
-
-  // Convert the cyclic graph to a DAG by grouping strongly connected components
-  ComputeDAG();
-
-  // Compute dominators and cuumulative sizes
-  for (auto& scc : leak_scc_) {
-    if (scc->node.references_in.size() == 0) {
-      scc->dominator = true;
-      AccumulateLeaks(scc.get());
-    }
-  }
-
-  return true;
-}
-
-bool LeakFolding::Leaked(allocator::vector<LeakFolding::Leak>& leaked, size_t* num_leaks_out,
-                         size_t* leak_bytes_out) {
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  for (auto& it : leak_map_) {
-    const LeakInfo& leak = it.second;
-    num_leaks++;
-    leak_bytes += leak.range.size();
-  }
-
-  for (auto& it : leak_map_) {
-    const LeakInfo& leak = it.second;
-    if (leak.scc->dominator) {
-      leaked.emplace_back(Leak{leak.range, leak.scc->cuumulative_count - 1,
-                               leak.scc->cuumulative_size - leak.range.size()});
-    }
-  }
-
-  if (num_leaks_out) {
-    *num_leaks_out = num_leaks;
-  }
-  if (leak_bytes_out) {
-    *leak_bytes_out = leak_bytes;
-  }
-
-  return true;
-}
-
-}  // namespace android
diff --git a/libmemunreachable/LeakFolding.h b/libmemunreachable/LeakFolding.h
deleted file mode 100644
index 09affac..0000000
--- a/libmemunreachable/LeakFolding.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_FOLDING_H_
-#define LIBMEMUNREACHABLE_LEAK_FOLDING_H_
-
-#include "HeapWalker.h"
-
-namespace android {
-
-class LeakFolding {
- public:
-  LeakFolding(Allocator<void> allocator, HeapWalker& heap_walker)
-      : allocator_(allocator),
-        heap_walker_(heap_walker),
-        leak_map_(allocator),
-        leak_graph_(allocator),
-        leak_scc_(allocator) {}
-
-  bool FoldLeaks();
-
-  struct Leak {
-    const Range range;
-    size_t referenced_count;
-    size_t referenced_size;
-  };
-
-  bool Leaked(allocator::vector<Leak>& leaked, size_t* num_leaks_out, size_t* leak_bytes_out);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(LeakFolding);
-  Allocator<void> allocator_;
-  HeapWalker& heap_walker_;
-
-  struct SCCInfo {
-   public:
-    Node<SCCInfo> node;
-
-    size_t count;
-    size_t size;
-
-    size_t cuumulative_count;
-    size_t cuumulative_size;
-
-    bool dominator;
-    SCCInfo* accumulator;
-
-    explicit SCCInfo(Allocator<SCCInfo> allocator)
-        : node(this, allocator),
-          count(0),
-          size(0),
-          cuumulative_count(0),
-          cuumulative_size(0),
-          dominator(false),
-          accumulator(nullptr) {}
-
-   private:
-    SCCInfo(SCCInfo&&) = delete;
-    DISALLOW_COPY_AND_ASSIGN(SCCInfo);
-  };
-
-  struct LeakInfo {
-   public:
-    Node<LeakInfo> node;
-
-    const Range range;
-
-    SCCInfo* scc;
-
-    LeakInfo(const Range& range, Allocator<LeakInfo> allocator)
-        : node(this, allocator), range(range), scc(nullptr) {}
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(LeakInfo);
-  };
-
-  void ComputeDAG();
-  void AccumulateLeaks(SCCInfo* dominator);
-
-  allocator::map<Range, LeakInfo, compare_range> leak_map_;
-  Graph<LeakInfo> leak_graph_;
-  allocator::vector<Allocator<SCCInfo>::unique_ptr> leak_scc_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_LEAK_FOLDING_H_
diff --git a/libmemunreachable/LeakPipe.cpp b/libmemunreachable/LeakPipe.cpp
deleted file mode 100644
index 8ea9ad6..0000000
--- a/libmemunreachable/LeakPipe.cpp
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <string.h>
-
-#include "LeakPipe.h"
-
-#include "log.h"
-
-namespace android {
-
-bool LeakPipe::SendFd(int sock, int fd) {
-  struct msghdr hdr {};
-  struct iovec iov {};
-  unsigned int data = 0xfdfdfdfd;
-  alignas(struct cmsghdr) char cmsgbuf[CMSG_SPACE(sizeof(int))];
-
-  hdr.msg_iov = &iov;
-  hdr.msg_iovlen = 1;
-  iov.iov_base = &data;
-  iov.iov_len = sizeof(data);
-
-  hdr.msg_control = cmsgbuf;
-  hdr.msg_controllen = CMSG_LEN(sizeof(int));
-
-  struct cmsghdr* cmsg = CMSG_FIRSTHDR(&hdr);
-  cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-  cmsg->cmsg_level = SOL_SOCKET;
-  cmsg->cmsg_type = SCM_RIGHTS;
-
-  *(int*)CMSG_DATA(cmsg) = fd;
-
-  int ret = sendmsg(sock, &hdr, 0);
-  if (ret < 0) {
-    MEM_ALOGE("failed to send fd: %s", strerror(errno));
-    return false;
-  }
-  if (ret == 0) {
-    MEM_ALOGE("eof when sending fd");
-    return false;
-  }
-
-  return true;
-}
-
-int LeakPipe::ReceiveFd(int sock) {
-  struct msghdr hdr {};
-  struct iovec iov {};
-  unsigned int data;
-  alignas(struct cmsghdr) char cmsgbuf[CMSG_SPACE(sizeof(int))];
-
-  hdr.msg_iov = &iov;
-  hdr.msg_iovlen = 1;
-  iov.iov_base = &data;
-  iov.iov_len = sizeof(data);
-
-  hdr.msg_control = cmsgbuf;
-  hdr.msg_controllen = CMSG_LEN(sizeof(int));
-
-  int ret = recvmsg(sock, &hdr, 0);
-  if (ret < 0) {
-    MEM_ALOGE("failed to receive fd: %s", strerror(errno));
-    return -1;
-  }
-  if (ret == 0) {
-    MEM_ALOGE("eof when receiving fd");
-    return -1;
-  }
-
-  struct cmsghdr* cmsg = CMSG_FIRSTHDR(&hdr);
-  if (cmsg == NULL || cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
-    MEM_ALOGE("missing fd while receiving fd");
-    return -1;
-  }
-
-  return *(int*)CMSG_DATA(cmsg);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/LeakPipe.h b/libmemunreachable/LeakPipe.h
deleted file mode 100644
index 94d4aa4..0000000
--- a/libmemunreachable/LeakPipe.h
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LEAK_PIPE_H_
-#define LIBMEMUNREACHABLE_LEAK_PIPE_H_
-
-#include <sys/socket.h>
-
-#include <vector>
-
-#include "android-base/macros.h"
-
-#include "ScopedPipe.h"
-#include "log.h"
-
-namespace android {
-
-// LeakPipe implements a pipe that can transfer vectors of simple objects
-// between processes.  The pipe is created in the sending process and
-// transferred over a socketpair that was created before forking.  This ensures
-// that only the sending process can have the send side of the pipe open, so if
-// the sending process dies the pipe will close.
-class LeakPipe {
- public:
-  LeakPipe() {
-    int ret = socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv_);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to create socketpair: %s", strerror(errno));
-    }
-  }
-
-  ~LeakPipe() { Close(); }
-
-  void Close() {
-    close(sv_[0]);
-    close(sv_[1]);
-    sv_[0] = -1;
-    sv_[1] = -1;
-  }
-
-  bool OpenReceiver() {
-    int fd = ReceiveFd(sv_[0]);
-    if (fd < 0) {
-      return false;
-    }
-
-    receiver_.SetFd(fd);
-    return true;
-  }
-
-  bool OpenSender() {
-    ScopedPipe pipe;
-
-    if (!SendFd(sv_[1], pipe.Receiver())) {
-      return false;
-    }
-    pipe.ReleaseReceiver();
-
-    sender_.SetFd(pipe.ReleaseSender());
-    return true;
-  }
-
-  class LeakPipeBase {
-   public:
-    LeakPipeBase() : fd_(-1) {}
-
-    ~LeakPipeBase() { Close(); }
-
-    void SetFd(int fd) { fd_ = fd; }
-
-    void Close() {
-      close(fd_);
-      fd_ = -1;
-    }
-
-   protected:
-    int fd_;
-
-   private:
-    DISALLOW_COPY_AND_ASSIGN(LeakPipeBase);
-  };
-
-  class LeakPipeSender : public LeakPipeBase {
-   public:
-    using LeakPipeBase::LeakPipeBase;
-
-    template <typename T>
-    bool Send(const T& value) {
-      ssize_t ret = TEMP_FAILURE_RETRY(write(fd_, &value, sizeof(T)));
-      if (ret < 0) {
-        MEM_ALOGE("failed to send value: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != sizeof(T)) {
-        MEM_ALOGE("eof while writing value");
-        return false;
-      }
-
-      return true;
-    }
-
-    template <class T, class Alloc = std::allocator<T>>
-    bool SendVector(const std::vector<T, Alloc>& vector) {
-      size_t size = vector.size() * sizeof(T);
-      if (!Send(size)) {
-        return false;
-      }
-
-      ssize_t ret = TEMP_FAILURE_RETRY(write(fd_, vector.data(), size));
-      if (ret < 0) {
-        MEM_ALOGE("failed to send vector: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != size) {
-        MEM_ALOGE("eof while writing vector");
-        return false;
-      }
-
-      return true;
-    }
-  };
-
-  class LeakPipeReceiver : public LeakPipeBase {
-   public:
-    using LeakPipeBase::LeakPipeBase;
-
-    template <typename T>
-    bool Receive(T* value) {
-      ssize_t ret = TEMP_FAILURE_RETRY(read(fd_, reinterpret_cast<void*>(value), sizeof(T)));
-      if (ret < 0) {
-        MEM_ALOGE("failed to receive value: %s", strerror(errno));
-        return false;
-      } else if (static_cast<size_t>(ret) != sizeof(T)) {
-        MEM_ALOGE("eof while receiving value");
-        return false;
-      }
-
-      return true;
-    }
-
-    template <class T, class Alloc = std::allocator<T>>
-    bool ReceiveVector(std::vector<T, Alloc>& vector) {
-      size_t size = 0;
-      if (!Receive(&size)) {
-        return false;
-      }
-
-      vector.resize(size / sizeof(T));
-
-      char* ptr = reinterpret_cast<char*>(vector.data());
-      while (size > 0) {
-        ssize_t ret = TEMP_FAILURE_RETRY(read(fd_, ptr, size));
-        if (ret < 0) {
-          MEM_ALOGE("failed to send vector: %s", strerror(errno));
-          return false;
-        } else if (ret == 0) {
-          MEM_ALOGE("eof while reading vector");
-          return false;
-        }
-        size -= ret;
-        ptr += ret;
-      }
-
-      return true;
-    }
-  };
-
-  LeakPipeReceiver& Receiver() { return receiver_; }
-
-  LeakPipeSender& Sender() { return sender_; }
-
- private:
-  LeakPipeReceiver receiver_;
-  LeakPipeSender sender_;
-  bool SendFd(int sock, int fd);
-  int ReceiveFd(int sock);
-  DISALLOW_COPY_AND_ASSIGN(LeakPipe);
-  int sv_[2];
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_LEAK_PIPE_H_
diff --git a/libmemunreachable/LinkedList.h b/libmemunreachable/LinkedList.h
deleted file mode 100644
index 36fe9fd..0000000
--- a/libmemunreachable/LinkedList.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LINKED_LIST_H_
-#define LIBMEMUNREACHABLE_LINKED_LIST_H_
-
-namespace android {
-
-template <class T>
-class LinkedList {
- public:
-  LinkedList() : next_(this), prev_(this), data_() {}
-  explicit LinkedList(T data) : LinkedList() { data_ = data; }
-  ~LinkedList() {}
-  void insert(LinkedList<T>& node) {
-    assert(node.empty());
-    node.next_ = this->next_;
-    node.next_->prev_ = &node;
-    this->next_ = &node;
-    node.prev_ = this;
-  }
-  void remove() {
-    this->next_->prev_ = this->prev_;
-    this->prev_->next_ = this->next_;
-    this->next_ = this;
-    this->prev_ = this;
-  }
-  T data() { return data_; }
-  bool empty() { return next_ == this && prev_ == this; }
-  LinkedList<T>* next() { return next_; }
-
- private:
-  LinkedList<T>* next_;
-  LinkedList<T>* prev_;
-  T data_;
-};
-
-template <class T>
-class LinkedListHead {
- public:
-  LinkedListHead() : node_() {}
-  ~LinkedListHead() {}
-
- private:
-  LinkedList<T> node_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/MemUnreachable.cpp b/libmemunreachable/MemUnreachable.cpp
deleted file mode 100644
index c4add19..0000000
--- a/libmemunreachable/MemUnreachable.cpp
+++ /dev/null
@@ -1,564 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <inttypes.h>
-#include <string.h>
-
-#include <functional>
-#include <iomanip>
-#include <mutex>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-
-#include <android-base/macros.h>
-#include <android-base/strings.h>
-#include <backtrace.h>
-
-#include "Allocator.h"
-#include "Binder.h"
-#include "HeapWalker.h"
-#include "Leak.h"
-#include "LeakFolding.h"
-#include "LeakPipe.h"
-#include "ProcessMappings.h"
-#include "PtracerThread.h"
-#include "ScopedDisableMalloc.h"
-#include "Semaphore.h"
-#include "ThreadCapture.h"
-
-#include "bionic.h"
-#include "log.h"
-#include "memunreachable/memunreachable.h"
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-const size_t Leak::contents_length;
-
-class MemUnreachable {
- public:
-  MemUnreachable(pid_t pid, Allocator<void> allocator)
-      : pid_(pid), allocator_(allocator), heap_walker_(allocator_) {}
-  bool CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                          const allocator::vector<Mapping>& mappings,
-                          const allocator::vector<uintptr_t>& refs);
-  bool GetUnreachableMemory(allocator::vector<Leak>& leaks, size_t limit, size_t* num_leaks,
-                            size_t* leak_bytes);
-  size_t Allocations() { return heap_walker_.Allocations(); }
-  size_t AllocationBytes() { return heap_walker_.AllocationBytes(); }
-
- private:
-  bool ClassifyMappings(const allocator::vector<Mapping>& mappings,
-                        allocator::vector<Mapping>& heap_mappings,
-                        allocator::vector<Mapping>& anon_mappings,
-                        allocator::vector<Mapping>& globals_mappings,
-                        allocator::vector<Mapping>& stack_mappings);
-  DISALLOW_COPY_AND_ASSIGN(MemUnreachable);
-  pid_t pid_;
-  Allocator<void> allocator_;
-  HeapWalker heap_walker_;
-};
-
-static void HeapIterate(const Mapping& heap_mapping,
-                        const std::function<void(uintptr_t, size_t)>& func) {
-  malloc_iterate(heap_mapping.begin, heap_mapping.end - heap_mapping.begin,
-                 [](uintptr_t base, size_t size, void* arg) {
-                   auto f = reinterpret_cast<const std::function<void(uintptr_t, size_t)>*>(arg);
-                   (*f)(base, size);
-                 },
-                 const_cast<void*>(reinterpret_cast<const void*>(&func)));
-}
-
-bool MemUnreachable::CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                                        const allocator::vector<Mapping>& mappings,
-                                        const allocator::vector<uintptr_t>& refs) {
-  MEM_ALOGI("searching process %d for allocations", pid_);
-
-  for (auto it = mappings.begin(); it != mappings.end(); it++) {
-    heap_walker_.Mapping(it->begin, it->end);
-  }
-
-  allocator::vector<Mapping> heap_mappings{mappings};
-  allocator::vector<Mapping> anon_mappings{mappings};
-  allocator::vector<Mapping> globals_mappings{mappings};
-  allocator::vector<Mapping> stack_mappings{mappings};
-  if (!ClassifyMappings(mappings, heap_mappings, anon_mappings, globals_mappings, stack_mappings)) {
-    return false;
-  }
-
-  for (auto it = heap_mappings.begin(); it != heap_mappings.end(); it++) {
-    MEM_ALOGV("Heap mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    HeapIterate(*it,
-                [&](uintptr_t base, size_t size) { heap_walker_.Allocation(base, base + size); });
-  }
-
-  for (auto it = anon_mappings.begin(); it != anon_mappings.end(); it++) {
-    MEM_ALOGV("Anon mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    heap_walker_.Allocation(it->begin, it->end);
-  }
-
-  for (auto it = globals_mappings.begin(); it != globals_mappings.end(); it++) {
-    MEM_ALOGV("Globals mapping %" PRIxPTR "-%" PRIxPTR " %s", it->begin, it->end, it->name);
-    heap_walker_.Root(it->begin, it->end);
-  }
-
-  for (auto thread_it = threads.begin(); thread_it != threads.end(); thread_it++) {
-    for (auto it = stack_mappings.begin(); it != stack_mappings.end(); it++) {
-      if (thread_it->stack.first >= it->begin && thread_it->stack.first <= it->end) {
-        MEM_ALOGV("Stack %" PRIxPTR "-%" PRIxPTR " %s", thread_it->stack.first, it->end, it->name);
-        heap_walker_.Root(thread_it->stack.first, it->end);
-      }
-    }
-    heap_walker_.Root(thread_it->regs);
-  }
-
-  heap_walker_.Root(refs);
-
-  MEM_ALOGI("searching done");
-
-  return true;
-}
-
-bool MemUnreachable::GetUnreachableMemory(allocator::vector<Leak>& leaks, size_t limit,
-                                          size_t* num_leaks, size_t* leak_bytes) {
-  MEM_ALOGI("sweeping process %d for unreachable memory", pid_);
-  leaks.clear();
-
-  if (!heap_walker_.DetectLeaks()) {
-    return false;
-  }
-
-  allocator::vector<Range> leaked1{allocator_};
-  heap_walker_.Leaked(leaked1, 0, num_leaks, leak_bytes);
-
-  MEM_ALOGI("sweeping done");
-
-  MEM_ALOGI("folding related leaks");
-
-  LeakFolding folding(allocator_, heap_walker_);
-  if (!folding.FoldLeaks()) {
-    return false;
-  }
-
-  allocator::vector<LeakFolding::Leak> leaked{allocator_};
-
-  if (!folding.Leaked(leaked, num_leaks, leak_bytes)) {
-    return false;
-  }
-
-  allocator::unordered_map<Leak::Backtrace, Leak*> backtrace_map{allocator_};
-
-  // Prevent reallocations of backing memory so we can store pointers into it
-  // in backtrace_map.
-  leaks.reserve(leaked.size());
-
-  for (auto& it : leaked) {
-    leaks.emplace_back();
-    Leak* leak = &leaks.back();
-
-    ssize_t num_backtrace_frames = malloc_backtrace(
-        reinterpret_cast<void*>(it.range.begin), leak->backtrace.frames, leak->backtrace.max_frames);
-    if (num_backtrace_frames > 0) {
-      leak->backtrace.num_frames = num_backtrace_frames;
-
-      auto inserted = backtrace_map.emplace(leak->backtrace, leak);
-      if (!inserted.second) {
-        // Leak with same backtrace already exists, drop this one and
-        // increment similar counts on the existing one.
-        leaks.pop_back();
-        Leak* similar_leak = inserted.first->second;
-        similar_leak->similar_count++;
-        similar_leak->similar_size += it.range.size();
-        similar_leak->similar_referenced_count += it.referenced_count;
-        similar_leak->similar_referenced_size += it.referenced_size;
-        similar_leak->total_size += it.range.size();
-        similar_leak->total_size += it.referenced_size;
-        continue;
-      }
-    }
-
-    leak->begin = it.range.begin;
-    leak->size = it.range.size();
-    leak->referenced_count = it.referenced_count;
-    leak->referenced_size = it.referenced_size;
-    leak->total_size = leak->size + leak->referenced_size;
-    memcpy(leak->contents, reinterpret_cast<void*>(it.range.begin),
-           std::min(leak->size, Leak::contents_length));
-  }
-
-  MEM_ALOGI("folding done");
-
-  std::sort(leaks.begin(), leaks.end(),
-            [](const Leak& a, const Leak& b) { return a.total_size > b.total_size; });
-
-  if (leaks.size() > limit) {
-    leaks.resize(limit);
-  }
-
-  return true;
-}
-
-static bool has_prefix(const allocator::string& s, const char* prefix) {
-  int ret = s.compare(0, strlen(prefix), prefix);
-  return ret == 0;
-}
-
-static bool is_sanitizer_mapping(const allocator::string& s) {
-  return s == "[anon:low shadow]" || s == "[anon:high shadow]" || has_prefix(s, "[anon:hwasan");
-}
-
-bool MemUnreachable::ClassifyMappings(const allocator::vector<Mapping>& mappings,
-                                      allocator::vector<Mapping>& heap_mappings,
-                                      allocator::vector<Mapping>& anon_mappings,
-                                      allocator::vector<Mapping>& globals_mappings,
-                                      allocator::vector<Mapping>& stack_mappings) {
-  heap_mappings.clear();
-  anon_mappings.clear();
-  globals_mappings.clear();
-  stack_mappings.clear();
-
-  allocator::string current_lib{allocator_};
-
-  for (auto it = mappings.begin(); it != mappings.end(); it++) {
-    if (it->execute) {
-      current_lib = it->name;
-      continue;
-    }
-
-    if (!it->read) {
-      continue;
-    }
-
-    const allocator::string mapping_name{it->name, allocator_};
-    if (mapping_name == "[anon:.bss]") {
-      // named .bss section
-      globals_mappings.emplace_back(*it);
-    } else if (mapping_name == current_lib) {
-      // .rodata or .data section
-      globals_mappings.emplace_back(*it);
-    } else if (mapping_name == "[anon:libc_malloc]" ||
-               android::base::StartsWith(mapping_name, "[anon:scudo:")) {
-      // named malloc mapping
-      heap_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[anon:dalvik-")) {
-      // named dalvik heap mapping
-      globals_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[stack")) {
-      // named stack mapping
-      stack_mappings.emplace_back(*it);
-    } else if (mapping_name.size() == 0) {
-      globals_mappings.emplace_back(*it);
-    } else if (has_prefix(mapping_name, "[anon:") &&
-               mapping_name != "[anon:leak_detector_malloc]" &&
-               !is_sanitizer_mapping(mapping_name)) {
-      // TODO(ccross): it would be nice to treat named anonymous mappings as
-      // possible leaks, but naming something in a .bss or .data section makes
-      // it impossible to distinguish them from mmaped and then named mappings.
-      globals_mappings.emplace_back(*it);
-    }
-  }
-
-  return true;
-}
-
-template <typename T>
-static inline const char* plural(T val) {
-  return (val == 1) ? "" : "s";
-}
-
-bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit) {
-  if (info.version > 0) {
-    MEM_ALOGE("unsupported UnreachableMemoryInfo.version %zu in GetUnreachableMemory",
-              info.version);
-    return false;
-  }
-
-  int parent_pid = getpid();
-  int parent_tid = gettid();
-
-  Heap heap;
-
-  Semaphore continue_parent_sem;
-  LeakPipe pipe;
-
-  PtracerThread thread{[&]() -> int {
-    /////////////////////////////////////////////
-    // Collection thread
-    /////////////////////////////////////////////
-    MEM_ALOGI("collecting thread info for process %d...", parent_pid);
-
-    ThreadCapture thread_capture(parent_pid, heap);
-    allocator::vector<ThreadInfo> thread_info(heap);
-    allocator::vector<Mapping> mappings(heap);
-    allocator::vector<uintptr_t> refs(heap);
-
-    // ptrace all the threads
-    if (!thread_capture.CaptureThreads()) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // collect register contents and stacks
-    if (!thread_capture.CapturedThreadInfo(thread_info)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // snapshot /proc/pid/maps
-    if (!ProcessMappings(parent_pid, mappings)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    if (!BinderReferences(refs)) {
-      continue_parent_sem.Post();
-      return 1;
-    }
-
-    // malloc must be enabled to call fork, at_fork handlers take the same
-    // locks as ScopedDisableMalloc.  All threads are paused in ptrace, so
-    // memory state is still consistent.  Unfreeze the original thread so it
-    // can drop the malloc locks, it will block until the collection thread
-    // exits.
-    thread_capture.ReleaseThread(parent_tid);
-    continue_parent_sem.Post();
-
-    // fork a process to do the heap walking
-    int ret = fork();
-    if (ret < 0) {
-      return 1;
-    } else if (ret == 0) {
-      /////////////////////////////////////////////
-      // Heap walker process
-      /////////////////////////////////////////////
-      // Examine memory state in the child using the data collected above and
-      // the CoW snapshot of the process memory contents.
-
-      if (!pipe.OpenSender()) {
-        _exit(1);
-      }
-
-      MemUnreachable unreachable{parent_pid, heap};
-
-      if (!unreachable.CollectAllocations(thread_info, mappings, refs)) {
-        _exit(2);
-      }
-      size_t num_allocations = unreachable.Allocations();
-      size_t allocation_bytes = unreachable.AllocationBytes();
-
-      allocator::vector<Leak> leaks{heap};
-
-      size_t num_leaks = 0;
-      size_t leak_bytes = 0;
-      bool ok = unreachable.GetUnreachableMemory(leaks, limit, &num_leaks, &leak_bytes);
-
-      ok = ok && pipe.Sender().Send(num_allocations);
-      ok = ok && pipe.Sender().Send(allocation_bytes);
-      ok = ok && pipe.Sender().Send(num_leaks);
-      ok = ok && pipe.Sender().Send(leak_bytes);
-      ok = ok && pipe.Sender().SendVector(leaks);
-
-      if (!ok) {
-        _exit(3);
-      }
-
-      _exit(0);
-    } else {
-      // Nothing left to do in the collection thread, return immediately,
-      // releasing all the captured threads.
-      MEM_ALOGI("collection thread done");
-      return 0;
-    }
-  }};
-
-  /////////////////////////////////////////////
-  // Original thread
-  /////////////////////////////////////////////
-
-  {
-    // Disable malloc to get a consistent view of memory
-    ScopedDisableMalloc disable_malloc;
-
-    // Start the collection thread
-    thread.Start();
-
-    // Wait for the collection thread to signal that it is ready to fork the
-    // heap walker process.
-    continue_parent_sem.Wait(30s);
-
-    // Re-enable malloc so the collection thread can fork.
-  }
-
-  // Wait for the collection thread to exit
-  int ret = thread.Join();
-  if (ret != 0) {
-    return false;
-  }
-
-  // Get a pipe from the heap walker process.  Transferring a new pipe fd
-  // ensures no other forked processes can have it open, so when the heap
-  // walker process dies the remote side of the pipe will close.
-  if (!pipe.OpenReceiver()) {
-    return false;
-  }
-
-  bool ok = true;
-  ok = ok && pipe.Receiver().Receive(&info.num_allocations);
-  ok = ok && pipe.Receiver().Receive(&info.allocation_bytes);
-  ok = ok && pipe.Receiver().Receive(&info.num_leaks);
-  ok = ok && pipe.Receiver().Receive(&info.leak_bytes);
-  ok = ok && pipe.Receiver().ReceiveVector(info.leaks);
-  if (!ok) {
-    return false;
-  }
-
-  MEM_ALOGI("unreachable memory detection done");
-  MEM_ALOGE("%zu bytes in %zu allocation%s unreachable out of %zu bytes in %zu allocation%s",
-            info.leak_bytes, info.num_leaks, plural(info.num_leaks), info.allocation_bytes,
-            info.num_allocations, plural(info.num_allocations));
-  return true;
-}
-
-std::string Leak::ToString(bool log_contents) const {
-  std::ostringstream oss;
-
-  oss << "  " << std::dec << size;
-  oss << " bytes unreachable at ";
-  oss << std::hex << begin;
-  oss << std::endl;
-  if (referenced_count > 0) {
-    oss << std::dec;
-    oss << "   referencing " << referenced_size << " unreachable bytes";
-    oss << " in " << referenced_count << " allocation" << plural(referenced_count);
-    oss << std::endl;
-  }
-  if (similar_count > 0) {
-    oss << std::dec;
-    oss << "   and " << similar_size << " similar unreachable bytes";
-    oss << " in " << similar_count << " allocation" << plural(similar_count);
-    oss << std::endl;
-    if (similar_referenced_count > 0) {
-      oss << "   referencing " << similar_referenced_size << " unreachable bytes";
-      oss << " in " << similar_referenced_count << " allocation" << plural(similar_referenced_count);
-      oss << std::endl;
-    }
-  }
-
-  if (log_contents) {
-    const int bytes_per_line = 16;
-    const size_t bytes = std::min(size, contents_length);
-
-    if (bytes == size) {
-      oss << "   contents:" << std::endl;
-    } else {
-      oss << "   first " << bytes << " bytes of contents:" << std::endl;
-    }
-
-    for (size_t i = 0; i < bytes; i += bytes_per_line) {
-      oss << "   " << std::hex << begin + i << ": ";
-      size_t j;
-      oss << std::setfill('0');
-      for (j = i; j < bytes && j < i + bytes_per_line; j++) {
-        oss << std::setw(2) << static_cast<int>(contents[j]) << " ";
-      }
-      oss << std::setfill(' ');
-      for (; j < i + bytes_per_line; j++) {
-        oss << "   ";
-      }
-      for (j = i; j < bytes && j < i + bytes_per_line; j++) {
-        char c = contents[j];
-        if (c < ' ' || c >= 0x7f) {
-          c = '.';
-        }
-        oss << c;
-      }
-      oss << std::endl;
-    }
-  }
-  if (backtrace.num_frames > 0) {
-    oss << backtrace_string(backtrace.frames, backtrace.num_frames);
-  }
-
-  return oss.str();
-}
-
-std::string UnreachableMemoryInfo::ToString(bool log_contents) const {
-  std::ostringstream oss;
-  oss << "  " << leak_bytes << " bytes in ";
-  oss << num_leaks << " unreachable allocation" << plural(num_leaks);
-  oss << std::endl;
-  oss << "  ABI: '" ABI_STRING "'" << std::endl;
-  oss << std::endl;
-
-  for (auto it = leaks.begin(); it != leaks.end(); it++) {
-    oss << it->ToString(log_contents);
-    oss << std::endl;
-  }
-
-  return oss.str();
-}
-
-UnreachableMemoryInfo::~UnreachableMemoryInfo() {
-  // Clear the memory that holds the leaks, otherwise the next attempt to
-  // detect leaks may find the old data (for example in the jemalloc tcache)
-  // and consider all the leaks to be referenced.
-  memset(leaks.data(), 0, leaks.capacity() * sizeof(Leak));
-
-  std::vector<Leak> tmp;
-  leaks.swap(tmp);
-
-  // Disable and re-enable malloc to flush the jemalloc tcache to make sure
-  // there are no copies of the leaked pointer addresses there.
-  malloc_disable();
-  malloc_enable();
-}
-
-std::string GetUnreachableMemoryString(bool log_contents, size_t limit) {
-  UnreachableMemoryInfo info;
-  if (!GetUnreachableMemory(info, limit)) {
-    return "Failed to get unreachable memory\n"
-           "If you are trying to get unreachable memory from a system app\n"
-           "(like com.android.systemui), disable selinux first using\n"
-           "setenforce 0\n";
-  }
-
-  return info.ToString(log_contents);
-}
-
-}  // namespace android
-
-bool LogUnreachableMemory(bool log_contents, size_t limit) {
-  android::UnreachableMemoryInfo info;
-  if (!android::GetUnreachableMemory(info, limit)) {
-    return false;
-  }
-
-  for (auto it = info.leaks.begin(); it != info.leaks.end(); it++) {
-    MEM_ALOGE("%s", it->ToString(log_contents).c_str());
-  }
-  return true;
-}
-
-bool NoLeaks() {
-  android::UnreachableMemoryInfo info;
-  if (!android::GetUnreachableMemory(info, 0)) {
-    return false;
-  }
-
-  return info.num_leaks == 0;
-}
diff --git a/libmemunreachable/OWNERS b/libmemunreachable/OWNERS
deleted file mode 100644
index 9127a93..0000000
--- a/libmemunreachable/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-ccross@google.com
-cferris@google.com
diff --git a/libmemunreachable/ProcessMappings.cpp b/libmemunreachable/ProcessMappings.cpp
deleted file mode 100644
index 8e1be4c..0000000
--- a/libmemunreachable/ProcessMappings.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <android-base/unique_fd.h>
-#include <procinfo/process_map.h>
-
-#include "ProcessMappings.h"
-
-namespace android {
-
-struct ReadMapCallback {
-  ReadMapCallback(allocator::vector<Mapping>& mappings) : mappings_(mappings) {}
-
-  void operator()(uint64_t start, uint64_t end, uint16_t flags, uint64_t, ino_t,
-                  const char* name) const {
-    mappings_.emplace_back(start, end, flags & PROT_READ, flags & PROT_WRITE, flags & PROT_EXEC,
-                           name);
-  }
-
-  allocator::vector<Mapping>& mappings_;
-};
-
-bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings) {
-  char map_buffer[1024];
-  snprintf(map_buffer, sizeof(map_buffer), "/proc/%d/maps", pid);
-  android::base::unique_fd fd(open(map_buffer, O_RDONLY));
-  if (fd == -1) {
-    return false;
-  }
-  allocator::string content(mappings.get_allocator());
-  ssize_t n;
-  while ((n = TEMP_FAILURE_RETRY(read(fd, map_buffer, sizeof(map_buffer)))) > 0) {
-    content.append(map_buffer, n);
-  }
-  ReadMapCallback callback(mappings);
-  return android::procinfo::ReadMapFileContent(&content[0], callback);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/ProcessMappings.h b/libmemunreachable/ProcessMappings.h
deleted file mode 100644
index 94da69b..0000000
--- a/libmemunreachable/ProcessMappings.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
-#define LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
-
-#include <string.h>
-
-#include "Allocator.h"
-
-namespace android {
-
-struct Mapping {
-  uintptr_t begin;
-  uintptr_t end;
-  bool read;
-  bool write;
-  bool execute;
-  char name[96];
-
-  Mapping() {}
-  Mapping(uintptr_t begin, uintptr_t end, bool read, bool write, bool execute, const char* name)
-      : begin(begin), end(end), read(read), write(write), execute(execute) {
-    strlcpy(this->name, name, sizeof(this->name));
-  }
-};
-
-// This function is not re-entrant since it uses a static buffer for
-// the line data.
-bool ProcessMappings(pid_t pid, allocator::vector<Mapping>& mappings);
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_PROCESS_MAPPING_H_
diff --git a/libmemunreachable/PtracerThread.cpp b/libmemunreachable/PtracerThread.cpp
deleted file mode 100644
index d2fca49..0000000
--- a/libmemunreachable/PtracerThread.cpp
+++ /dev/null
@@ -1,155 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <pthread.h>
-#include <sched.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include "android-base/macros.h"
-
-#include "PtracerThread.h"
-#include "log.h"
-
-namespace android {
-
-class Stack {
- public:
-  explicit Stack(size_t size) : size_(size) {
-    int prot = PROT_READ | PROT_WRITE;
-    int flags = MAP_PRIVATE | MAP_ANONYMOUS;
-    page_size_ = sysconf(_SC_PAGE_SIZE);
-    size_ += page_size_ * 2;  // guard pages
-    base_ = mmap(NULL, size_, prot, flags, -1, 0);
-    if (base_ == MAP_FAILED) {
-      base_ = NULL;
-      size_ = 0;
-      return;
-    }
-    prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, base_, size_, "libmemunreachable stack");
-    mprotect(base_, page_size_, PROT_NONE);
-    mprotect(top(), page_size_, PROT_NONE);
-  };
-  ~Stack() { munmap(base_, size_); };
-  void* top() {
-    return reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(base_) + size_ - page_size_);
-  };
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Stack);
-
-  void* base_;
-  size_t size_;
-  size_t page_size_;
-};
-
-PtracerThread::PtracerThread(const std::function<int()>& func) : child_pid_(0) {
-  stack_ = std::make_unique<Stack>(PTHREAD_STACK_MIN);
-  if (stack_->top() == nullptr) {
-    MEM_LOG_ALWAYS_FATAL("failed to mmap child stack: %s", strerror(errno));
-  }
-
-  func_ = std::function<int()>{[&, func]() -> int {
-    // In the child thread, lock and unlock the mutex to wait for the parent
-    // to finish setting up for the child thread
-    std::unique_lock<std::mutex> lk(m_);
-    lk.unlock();
-    _exit(func());
-  }};
-}
-
-PtracerThread::~PtracerThread() {
-  Kill();
-  Join();
-  ClearTracer();
-  stack_ = nullptr;
-}
-
-bool PtracerThread::Start() {
-  std::unique_lock<std::mutex> lk(m_);
-
-  // Convert from void(*)(void*) to lambda with captures
-  auto proxy = [](void* arg) -> int {
-    prctl(PR_SET_NAME, "libmemunreachable ptrace thread");
-    return (*reinterpret_cast<std::function<int()>*>(arg))();
-  };
-
-  // See README.md for why we create the child process this way
-  child_pid_ = clone(proxy, stack_->top(), CLONE_VM | CLONE_FS | CLONE_FILES /*|CLONE_UNTRACED*/,
-                     reinterpret_cast<void*>(&func_));
-  if (child_pid_ < 0) {
-    MEM_ALOGE("failed to clone child: %s", strerror(errno));
-    return false;
-  }
-
-  SetTracer(child_pid_);
-
-  lk.unlock();
-
-  return true;
-}
-
-int PtracerThread::Join() {
-  if (child_pid_ == -1) {
-    return -1;
-  }
-  int status;
-  int ret = TEMP_FAILURE_RETRY(waitpid(child_pid_, &status, __WALL));
-  if (ret < 0) {
-    MEM_ALOGE("waitpid %d failed: %s", child_pid_, strerror(errno));
-    return -1;
-  }
-
-  child_pid_ = -1;
-
-  if (WIFEXITED(status)) {
-    return WEXITSTATUS(status);
-  } else if (WIFSIGNALED(status)) {
-    return -WTERMSIG(status);
-  } else {
-    MEM_ALOGE("unexpected status %x", status);
-    return -1;
-  }
-}
-
-void PtracerThread::Kill() {
-  if (child_pid_ == -1) {
-    return;
-  }
-
-  syscall(SYS_tkill, child_pid_, SIGKILL);
-}
-
-void PtracerThread::SetTracer(pid_t tracer_pid) {
-  prctl(PR_SET_PTRACER, tracer_pid);
-}
-
-void PtracerThread::ClearTracer() {
-  prctl(PR_SET_PTRACER, 0);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/PtracerThread.h b/libmemunreachable/PtracerThread.h
deleted file mode 100644
index 4f9c420..0000000
--- a/libmemunreachable/PtracerThread.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_PTRACER_THREAD_H_
-#define LIBMEMUNREACHABLE_PTRACER_THREAD_H_
-
-#include <functional>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-
-namespace android {
-
-class Stack;
-
-// PtracerThread is similar to std::thread, except that it creates a "thread"
-// that can ptrace the other threads.  The thread is actually a separate
-// process, with its own thread group, but shares address space and fds with
-// the parent.
-class PtracerThread {
- public:
-  explicit PtracerThread(const std::function<int()>& func);
-  ~PtracerThread();
-  bool Start();
-  int Join();
-
- private:
-  void SetTracer(pid_t);
-  void ClearTracer();
-  void Kill();
-  DISALLOW_COPY_AND_ASSIGN(PtracerThread);
-  std::unique_ptr<Stack> stack_;
-  std::function<int()> func_;
-  std::mutex m_;
-  pid_t child_pid_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_PTRACER_THREAD_H_
diff --git a/libmemunreachable/README.md b/libmemunreachable/README.md
deleted file mode 100644
index 9cc0c9b..0000000
--- a/libmemunreachable/README.md
+++ /dev/null
@@ -1,92 +0,0 @@
-libmemunreachable
-================
-
-Introduction
---------------
-libmemunreachable is a zero-overhead native memory leak detector.  It uses an imprecise mark-and-sweep garbage collector pass over all native memory, reporting any unreachable blocks as leaks.  It is similar to the [Heap Checker from tcmalloc](http://htmlpreview.github.io/?https://github.com/gperftools/gperftools/blob/master/doc/heap_checker.html), but with a few key differences to remove the overhead.  Instead of instrumenting every call to malloc and free, it queries the allocator (jemalloc) for active allocations when leak detection is requested.  In addition, it performs a very short stop-the-world data collection on the main process, and then forks a copy of the process to perform the mark-and-sweep, minimizing disruption to the original process.
-
-In the default (zero-overhead) mode, the returned data on leaks is limited to the address, approximate (upper bound) size, and the the first 32 bytes of the contents of the leaked allocation.  If malloc_debug backtraces are enabled they will be included in the leak information, but backtracing allocations requires significant overhead.
-
-----------
-
-Usage
--------
-
-### In Android apps ###
-
-libmemunreachble is loaded by zygote and can be triggered with `dumpsys -t 600 meminfo --unreachable [process]`.
-
-To enable malloc\_debug backtraces on allocations for a single app process on a userdebug device, use:
-```
-adb root
-adb shell setprop libc.debug.malloc.program app_process
-adb shell setprop wrap.[process] "\$\@"
-adb shell setprop libc.debug.malloc.options backtrace=4
-```
-
-Kill and restart the app, trigger the leak, and then run `dumpsys -t 600 meminfo --unreachable [process]`.
-
-To disable malloc\_debug:
-```
-adb shell setprop libc.debug.malloc.options "''"
-adb shell setprop libc.debug.malloc.program "''"
-adb shell setprop wrap.[process]  "''"
-```
-
-### C interface ###
-
-#### `bool LogUnreachableMemory(bool log_contents, size_t limit)` ####
-Writes a description of leaked memory to the log.  A summary is always written, followed by details of up to `limit` leaks.  If `log_contents` is `true`, details include up to 32 bytes of the contents of each leaked allocation.
-Returns true if leak detection succeeded.
-
-#### `bool NoLeaks()` ####
-Returns `true` if no unreachable memory was found.
-
-### C++ interface ###
-
-#### `bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit = 100)` ####
-Updates an `UnreachableMemoryInfo` object with information on leaks, including details on up to `limit` leaks.  Returns true if leak detection succeeded.
-
-#### `std::string GetUnreachableMemoryString(bool log_contents = false, size_t limit = 100)` ####
-Returns a description of leaked memory.  A summary is always written, followed by details of up to `limit` leaks.  If `log_contents` is `true`, details include up to 32 bytes of the contents of each leaked allocation.
-Returns true if leak detection succeeded.
-
-Implementation
--------------------
-The sequence of steps required to perform a leak detection pass is divided into three processes - the original process, the collection process, and the sweeper process.
-
- 1. *Original process*: Leak detection is requested by calling `GetUnreachableMemory()`
- 2. Allocations are disabled using `malloc_disable()`
- 3. The collection process is spawned.  The collection process, created using clone, is similar to a normal `fork()` child process, except that it shares the address space of the parent - any writes by the original process are visible to the collection process, and vice-versa. If we forked instead of using clone, the address space might get out of sync with observed post-ptrace thread state, since it takes some time to pause the parent.
- 4. *Collection process*: All threads in the original process are paused with `ptrace()`.
- 5. Registers contents, active stack areas, and memory mapping information are collected.
- 6. *Original process*: Allocations are re-enabled using `malloc_enable()`, but all threads are still paused with `ptrace()`.
- 7. *Collection process*: The sweeper process is spawned using a normal `fork()`.  The sweeper process has a copy of all memory from the original process, including all the data collected by the collection process.
- 8. Collection process releases all threads from `ptrace` and exits
- 9. *Original process*: All threads continue, the thread that called `GetUnreachableMemory()` blocks waiting for leak data over a pipe.
- 10. *Sweeper process*: A list of all active allocations is produced by examining the memory mappings and calling `malloc_iterate()` on any heap mappings.
- 11. A list of all roots is produced from globals (.data and .bss sections of binaries), and registers and stacks from each thread.
- 12. The mark-and-sweep pass is performed starting from roots.
- 13. Unmarked allocations are sent over the pipe back to the original process.
-
-----------
-
-
-Components
----------------
-- `MemUnreachable.cpp`: Entry points, implements the sequencing described above.
-- `PtracerThread.cpp`: Used to clone the collection process with shared address space.
-- `ThreadCapture.cpp`: Pauses threads in the main process and collects register contents.
-- `ProcessMappings.cpp`: Collects snapshots of `/proc/pid/maps`.
-- `HeapWalker.cpp`: Performs the mark-and-sweep pass over active allocations.
-- `LeakPipe.cpp`: transfers data describing leaks from the sweeper process to the original process.
-
-
-Heap allocator requirements
-----------------------------------
-libmemunreachable requires a small interface to the allocator in order to collect information about active allocations.
-
- - `malloc_disable()`: prevent any thread from mutating internal allocator state.
- - `malloc enable()`: re-enable allocations in all threads.
- - `malloc_iterate()`: call a callback on each active allocation in a given heap region.
- - `malloc_backtrace()`: return the backtrace from when the allocation at the given address was allocated, if it was collected.
diff --git a/libmemunreachable/ScopedAlarm.h b/libmemunreachable/ScopedAlarm.h
deleted file mode 100644
index bb50b9e..0000000
--- a/libmemunreachable/ScopedAlarm.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_ALARM_H_
-#define LIBMEMUNREACHABLE_SCOPED_ALARM_H_
-
-#include <signal.h>
-#include <sys/time.h>
-
-#include <chrono>
-#include <functional>
-
-namespace android {
-
-class ScopedAlarm {
- public:
-  ScopedAlarm(std::chrono::microseconds us, std::function<void()> func) {
-    func_ = func;
-    struct sigaction oldact {};
-    struct sigaction act {};
-    act.sa_handler = [](int) { ScopedAlarm::func_(); };
-    sigaction(SIGALRM, &act, &oldact);
-
-    std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us);
-    itimerval t = itimerval{};
-    t.it_value.tv_sec = s.count();
-    t.it_value.tv_usec = (us - s).count();
-    setitimer(ITIMER_REAL, &t, NULL);
-  }
-  ~ScopedAlarm() {
-    itimerval t = itimerval{};
-    setitimer(ITIMER_REAL, &t, NULL);
-    struct sigaction act {};
-    act.sa_handler = SIG_DFL;
-    sigaction(SIGALRM, &act, NULL);
-  }
-
- private:
-  static std::function<void()> func_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/ScopedDisableMalloc.h b/libmemunreachable/ScopedDisableMalloc.h
deleted file mode 100644
index dc863c9..0000000
--- a/libmemunreachable/ScopedDisableMalloc.h
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
-#define LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
-
-#include <memory>
-
-#include "android-base/macros.h"
-
-#include "ScopedAlarm.h"
-#include "bionic.h"
-#include "log.h"
-
-namespace android {
-
-class DisableMallocGuard {
- public:
-  DisableMallocGuard() : disabled_(false) {}
-  ~DisableMallocGuard() { Enable(); }
-
-  void Disable() {
-    if (!disabled_) {
-      disabled_ = true;
-      malloc_disable();
-    }
-  }
-
-  void Enable() {
-    if (disabled_) {
-      malloc_enable();
-      disabled_ = false;
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DisableMallocGuard);
-  bool disabled_;
-};
-
-// Any calls to malloc or free from this thread will deadlock as long as this
-// object is in scope.  Calls to malloc from other threads may succeed (for
-// example if the allocation is satisfied out of the thread's tcache), or may
-// block until the object is destroyed.
-//
-// Don't call fork() while malloc is disabled, it needs the same locks held
-// here.
-class ScopedDisableMalloc {
- public:
-  ScopedDisableMalloc() { disable_malloc_.Disable(); }
-
-  ~ScopedDisableMalloc() { disable_malloc_.Enable(); }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableMalloc);
-  DisableMallocGuard disable_malloc_;
-};
-
-class ScopedDisableMallocTimeout {
- public:
-  explicit ScopedDisableMallocTimeout(std::chrono::milliseconds timeout = std::chrono::seconds(10))
-      : timeout_(timeout), timed_out_(false), disable_malloc_() {
-    Disable();
-  }
-
-  ~ScopedDisableMallocTimeout() { Enable(); }
-
-  bool timed_out() { return timed_out_; }
-
-  void Enable() {
-    disable_malloc_.Enable();
-    alarm_ = nullptr;
-  }
-
-  void Disable() {
-    // set up the alarm before disabling malloc so unique_ptr can be used
-    alarm_ = std::make_unique<ScopedAlarm>(timeout_, [&]() {
-      disable_malloc_.Enable();
-      timed_out_ = true;
-    });
-
-    disable_malloc_.Disable();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedDisableMallocTimeout);
-  std::chrono::milliseconds timeout_;
-  bool timed_out_;
-  std::unique_ptr<ScopedAlarm> alarm_;
-  DisableMallocGuard disable_malloc_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SCOPED_DISABLE_MALLOC_H_
diff --git a/libmemunreachable/ScopedPipe.h b/libmemunreachable/ScopedPipe.h
deleted file mode 100644
index b9dead5..0000000
--- a/libmemunreachable/ScopedPipe.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_PIPE_H_
-#define LIBMEMUNREACHABLE_SCOPED_PIPE_H_
-
-#include <unistd.h>
-
-#include "log.h"
-
-namespace android {
-
-class ScopedPipe {
- public:
-  ScopedPipe() : pipefd_{-1, -1} {
-    int ret = pipe2(pipefd_, O_CLOEXEC);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to open pipe");
-    }
-  }
-  ~ScopedPipe() { Close(); }
-
-  ScopedPipe(ScopedPipe&& other) noexcept {
-    SetReceiver(other.ReleaseReceiver());
-    SetSender(other.ReleaseSender());
-  }
-
-  ScopedPipe& operator=(ScopedPipe&& other) noexcept {
-    SetReceiver(other.ReleaseReceiver());
-    SetSender(other.ReleaseSender());
-    return *this;
-  }
-
-  void CloseReceiver() { close(ReleaseReceiver()); }
-
-  void CloseSender() { close(ReleaseSender()); }
-
-  void Close() {
-    CloseReceiver();
-    CloseSender();
-  }
-
-  int Receiver() { return pipefd_[0]; }
-  int Sender() { return pipefd_[1]; }
-
-  int ReleaseReceiver() {
-    int ret = Receiver();
-    SetReceiver(-1);
-    return ret;
-  }
-
-  int ReleaseSender() {
-    int ret = Sender();
-    SetSender(-1);
-    return ret;
-  }
-
- private:
-  void SetReceiver(int fd) { pipefd_[0] = fd; };
-  void SetSender(int fd) { pipefd_[1] = fd; };
-
-  int pipefd_[2];
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/ScopedSignalHandler.h b/libmemunreachable/ScopedSignalHandler.h
deleted file mode 100644
index ef4473f..0000000
--- a/libmemunreachable/ScopedSignalHandler.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
-#define LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
-
-#include <errno.h>
-#include <signal.h>
-
-#include <functional>
-
-#include "android-base/macros.h"
-
-#include "Allocator.h"
-#include "log.h"
-
-namespace android {
-
-class ScopedSignalHandler {
- public:
-  using Fn = std::function<void(ScopedSignalHandler&, int, siginfo_t*, void*)>;
-
-  explicit ScopedSignalHandler(Allocator<ScopedSignalHandler> allocator) : signal_(-1) {
-    if (handler_map_ == nullptr) {
-      Allocator<SignalFnMap> map_allocator = allocator;
-      handler_map_ = map_allocator.make_unique(allocator);
-    }
-  }
-  ~ScopedSignalHandler() { reset(); }
-
-  template <class F>
-  void install(int signal, F&& f) {
-    if (signal_ != -1) MEM_LOG_ALWAYS_FATAL("ScopedSignalHandler already installed");
-
-    if (handler_map_->find(signal) != handler_map_->end()) {
-      MEM_LOG_ALWAYS_FATAL("ScopedSignalHandler already installed for %d", signal);
-    }
-
-    (*handler_map_)[signal] =
-        SignalFn([=](int signal, siginfo_t* si, void* uctx) { f(*this, signal, si, uctx); });
-
-    struct sigaction act {};
-    act.sa_sigaction = [](int signal, siginfo_t* si, void* uctx) {
-      ((*handler_map_)[signal])(signal, si, uctx);
-    };
-    act.sa_flags = SA_SIGINFO;
-
-    int ret = sigaction(signal, &act, &old_act_);
-    if (ret < 0) {
-      MEM_LOG_ALWAYS_FATAL("failed to install segfault handler: %s", strerror(errno));
-    }
-
-    signal_ = signal;
-  }
-
-  void reset() {
-    if (signal_ != -1) {
-      int ret = sigaction(signal_, &old_act_, NULL);
-      if (ret < 0) {
-        MEM_ALOGE("failed to uninstall segfault handler");
-      }
-
-      handler_map_->erase(signal_);
-      if (handler_map_->empty()) {
-        handler_map_.reset();
-      }
-      signal_ = -1;
-    }
-  }
-
- private:
-  using SignalFn = std::function<void(int, siginfo_t*, void*)>;
-  using SignalFnMap = allocator::unordered_map<int, SignalFn>;
-  DISALLOW_COPY_AND_ASSIGN(ScopedSignalHandler);
-  int signal_;
-  struct sigaction old_act_;
-  static Allocator<SignalFnMap>::unique_ptr handler_map_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SCOPED_SIGNAL_HANDLER_H_
diff --git a/libmemunreachable/Semaphore.h b/libmemunreachable/Semaphore.h
deleted file mode 100644
index cd73972..0000000
--- a/libmemunreachable/Semaphore.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_SEMAPHORE_H_
-#define LIBMEMUNREACHABLE_SEMAPHORE_H_
-
-#include <chrono>
-#include <mutex>
-
-#include "android-base/macros.h"
-
-namespace android {
-
-class Semaphore {
- public:
-  explicit Semaphore(int count = 0) : count_(count) {}
-  ~Semaphore() = default;
-
-  void Wait(std::chrono::milliseconds ms) {
-    std::unique_lock<std::mutex> lk(m_);
-    cv_.wait_for(lk, ms, [&] {
-      if (count_ > 0) {
-        count_--;
-        return true;
-      }
-      return false;
-    });
-  }
-  void Post() {
-    {
-      std::lock_guard<std::mutex> lk(m_);
-      count_++;
-    }
-    cv_.notify_one();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Semaphore);
-
-  int count_;
-  std::mutex m_;
-  std::condition_variable cv_;
-};
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_SEMAPHORE_H_
diff --git a/libmemunreachable/Tarjan.h b/libmemunreachable/Tarjan.h
deleted file mode 100644
index f3ab652..0000000
--- a/libmemunreachable/Tarjan.h
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// Based on system/update_engine/payload_generator/tarjan.cc
-
-#ifndef LIBMEMUNREACHABLE_TARJAN_H_
-#define LIBMEMUNREACHABLE_TARJAN_H_
-
-#include <assert.h>
-#include <algorithm>
-
-#include "Allocator.h"
-
-namespace android {
-
-template <class T>
-class Node {
- public:
-  allocator::set<Node<T>*> references_in;
-  allocator::set<Node<T>*> references_out;
-  size_t index;
-  size_t lowlink;
-
-  T* ptr;
-
-  Node(T* ptr, Allocator<Node> allocator)
-      : references_in(allocator), references_out(allocator), ptr(ptr){};
-  Node(Node&& rhs) noexcept = default;
-  void Edge(Node<T>* ref) {
-    references_out.emplace(ref);
-    ref->references_in.emplace(this);
-  }
-  template <class F>
-  void Foreach(F&& f) {
-    for (auto& node : references_out) {
-      f(node->ptr);
-    }
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(Node<T>);
-};
-
-template <class T>
-using Graph = allocator::vector<Node<T>*>;
-
-template <class T>
-using SCC = allocator::vector<Node<T>*>;
-
-template <class T>
-using SCCList = allocator::vector<SCC<T>>;
-
-template <class T>
-class TarjanAlgorithm {
- public:
-  explicit TarjanAlgorithm(Allocator<void> allocator)
-      : index_(0), stack_(allocator), components_(allocator) {}
-
-  void Execute(Graph<T>& graph, SCCList<T>& out);
-
- private:
-  static constexpr size_t UNDEFINED_INDEX = static_cast<size_t>(-1);
-  void Tarjan(Node<T>* vertex, Graph<T>& graph);
-
-  size_t index_;
-  allocator::vector<Node<T>*> stack_;
-  SCCList<T> components_;
-};
-
-template <class T>
-void TarjanAlgorithm<T>::Execute(Graph<T>& graph, SCCList<T>& out) {
-  stack_.clear();
-  components_.clear();
-  index_ = 0;
-  for (auto& it : graph) {
-    it->index = UNDEFINED_INDEX;
-    it->lowlink = UNDEFINED_INDEX;
-  }
-
-  for (auto& it : graph) {
-    if (it->index == UNDEFINED_INDEX) {
-      Tarjan(it, graph);
-    }
-  }
-  out.swap(components_);
-}
-
-template <class T>
-void TarjanAlgorithm<T>::Tarjan(Node<T>* vertex, Graph<T>& graph) {
-  assert(vertex->index == UNDEFINED_INDEX);
-  vertex->index = index_;
-  vertex->lowlink = index_;
-  index_++;
-  stack_.push_back(vertex);
-  for (auto& it : vertex->references_out) {
-    Node<T>* vertex_next = it;
-    if (vertex_next->index == UNDEFINED_INDEX) {
-      Tarjan(vertex_next, graph);
-      vertex->lowlink = std::min(vertex->lowlink, vertex_next->lowlink);
-    } else if (std::find(stack_.begin(), stack_.end(), vertex_next) != stack_.end()) {
-      vertex->lowlink = std::min(vertex->lowlink, vertex_next->index);
-    }
-  }
-  if (vertex->lowlink == vertex->index) {
-    SCC<T> component{components_.get_allocator()};
-    Node<T>* other_vertex;
-    do {
-      other_vertex = stack_.back();
-      stack_.pop_back();
-      component.push_back(other_vertex);
-    } while (other_vertex != vertex && !stack_.empty());
-
-    components_.emplace_back(component);
-  }
-}
-
-template <class T>
-void Tarjan(Graph<T>& graph, SCCList<T>& out) {
-  TarjanAlgorithm<T> tarjan{graph.get_allocator()};
-  tarjan.Execute(graph, out);
-}
-
-}  // namespace android
-
-#endif  // LIBMEMUNREACHABLE_TARJAN_H_
diff --git a/libmemunreachable/ThreadCapture.cpp b/libmemunreachable/ThreadCapture.cpp
deleted file mode 100644
index 45eb55d..0000000
--- a/libmemunreachable/ThreadCapture.cpp
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "ThreadCapture.h"
-
-#include <elf.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <sys/ptrace.h>
-#include <sys/stat.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <map>
-#include <memory>
-#include <set>
-#include <vector>
-
-#include <android-base/unique_fd.h>
-
-#include "Allocator.h"
-#include "log.h"
-
-namespace android {
-
-// bionic interfaces used:
-// atoi
-// strlcat
-// writev
-
-// bionic interfaces reimplemented to avoid allocation:
-// getdents64
-
-// Convert a pid > 0 to a string.  sprintf might allocate, so we can't use it.
-// Returns a pointer somewhere in buf to a null terminated string, or NULL
-// on error.
-static char* pid_to_str(char* buf, size_t len, pid_t pid) {
-  if (pid <= 0) {
-    return nullptr;
-  }
-
-  char* ptr = buf + len - 1;
-  *ptr = 0;
-  while (pid > 0) {
-    ptr--;
-    if (ptr < buf) {
-      return nullptr;
-    }
-    *ptr = '0' + (pid % 10);
-    pid /= 10;
-  }
-
-  return ptr;
-}
-
-class ThreadCaptureImpl {
- public:
-  ThreadCaptureImpl(pid_t pid, Allocator<ThreadCaptureImpl>& allocator);
-  ~ThreadCaptureImpl() {}
-  bool ListThreads(TidList& tids);
-  bool CaptureThreads();
-  bool ReleaseThreads();
-  bool ReleaseThread(pid_t tid);
-  bool CapturedThreadInfo(ThreadInfoList& threads);
-  void InjectTestFunc(std::function<void(pid_t)>&& f) { inject_test_func_ = f; }
-
- private:
-  int CaptureThread(pid_t tid);
-  bool ReleaseThread(pid_t tid, unsigned int signal);
-  int PtraceAttach(pid_t tid);
-  void PtraceDetach(pid_t tid, unsigned int signal);
-  bool PtraceThreadInfo(pid_t tid, ThreadInfo& thread_info);
-
-  allocator::map<pid_t, unsigned int> captured_threads_;
-  Allocator<ThreadCaptureImpl> allocator_;
-  pid_t pid_;
-  std::function<void(pid_t)> inject_test_func_;
-};
-
-ThreadCaptureImpl::ThreadCaptureImpl(pid_t pid, Allocator<ThreadCaptureImpl>& allocator)
-    : captured_threads_(allocator), allocator_(allocator), pid_(pid) {}
-
-bool ThreadCaptureImpl::ListThreads(TidList& tids) {
-  tids.clear();
-
-  char pid_buf[11];
-  char path[256] = "/proc/";
-  char* pid_str = pid_to_str(pid_buf, sizeof(pid_buf), pid_);
-  if (!pid_str) {
-    return false;
-  }
-  strlcat(path, pid_str, sizeof(path));
-  strlcat(path, "/task", sizeof(path));
-
-  android::base::unique_fd fd(open(path, O_CLOEXEC | O_DIRECTORY | O_RDONLY));
-  if (fd == -1) {
-    MEM_ALOGE("failed to open %s: %s", path, strerror(errno));
-    return false;
-  }
-
-  struct linux_dirent64 {
-    uint64_t d_ino;
-    int64_t d_off;
-    uint16_t d_reclen;
-    char d_type;
-    char d_name[];
-  } __attribute((packed));
-  char dirent_buf[4096];
-  ssize_t nread;
-  do {
-    nread = syscall(SYS_getdents64, fd.get(), dirent_buf, sizeof(dirent_buf));
-    if (nread < 0) {
-      MEM_ALOGE("failed to get directory entries from %s: %s", path, strerror(errno));
-      return false;
-    } else if (nread > 0) {
-      ssize_t off = 0;
-      while (off < nread) {
-        linux_dirent64* dirent = reinterpret_cast<linux_dirent64*>(dirent_buf + off);
-        off += dirent->d_reclen;
-        pid_t tid = atoi(dirent->d_name);
-        if (tid <= 0) {
-          continue;
-        }
-        tids.push_back(tid);
-      }
-    }
-
-  } while (nread != 0);
-
-  return true;
-}
-
-bool ThreadCaptureImpl::CaptureThreads() {
-  TidList tids{allocator_};
-
-  bool found_new_thread;
-  do {
-    if (!ListThreads(tids)) {
-      ReleaseThreads();
-      return false;
-    }
-
-    found_new_thread = false;
-
-    for (auto it = tids.begin(); it != tids.end(); it++) {
-      auto captured = captured_threads_.find(*it);
-      if (captured == captured_threads_.end()) {
-        if (CaptureThread(*it) < 0) {
-          ReleaseThreads();
-          return false;
-        }
-        found_new_thread = true;
-      }
-    }
-  } while (found_new_thread);
-
-  return true;
-}
-
-// Detatches from a thread, delivering signal if nonzero, logs on error
-void ThreadCaptureImpl::PtraceDetach(pid_t tid, unsigned int signal) {
-  void* sig_ptr = reinterpret_cast<void*>(static_cast<uintptr_t>(signal));
-  if (ptrace(PTRACE_DETACH, tid, NULL, sig_ptr) < 0 && errno != ESRCH) {
-    MEM_ALOGE("failed to detach from thread %d of process %d: %s", tid, pid_, strerror(errno));
-  }
-}
-
-// Attaches to and pauses thread.
-// Returns 1 on attach, 0 on tid not found, -1 and logs on error
-int ThreadCaptureImpl::PtraceAttach(pid_t tid) {
-  int ret = ptrace(PTRACE_SEIZE, tid, NULL, NULL);
-  if (ret < 0) {
-    MEM_ALOGE("failed to attach to thread %d of process %d: %s", tid, pid_, strerror(errno));
-    return -1;
-  }
-
-  if (inject_test_func_) {
-    inject_test_func_(tid);
-  }
-
-  if (ptrace(PTRACE_INTERRUPT, tid, 0, 0) < 0) {
-    if (errno == ESRCH) {
-      return 0;
-    } else {
-      MEM_ALOGE("failed to interrupt thread %d of process %d: %s", tid, pid_, strerror(errno));
-      PtraceDetach(tid, 0);
-      return -1;
-    }
-  }
-  return 1;
-}
-
-bool ThreadCaptureImpl::PtraceThreadInfo(pid_t tid, ThreadInfo& thread_info) {
-  thread_info.tid = tid;
-
-  const unsigned int max_num_regs = 128;  // larger than number of registers on any device
-  uintptr_t regs[max_num_regs];
-  struct iovec iovec;
-  iovec.iov_base = &regs;
-  iovec.iov_len = sizeof(regs);
-
-  if (ptrace(PTRACE_GETREGSET, tid, reinterpret_cast<void*>(NT_PRSTATUS), &iovec)) {
-    MEM_ALOGE("ptrace getregset for thread %d of process %d failed: %s", tid, pid_, strerror(errno));
-    return false;
-  }
-
-  unsigned int num_regs = iovec.iov_len / sizeof(uintptr_t);
-  thread_info.regs.assign(&regs[0], &regs[num_regs]);
-
-  const int sp =
-#if defined(__x86_64__)
-      offsetof(struct pt_regs, rsp) / sizeof(uintptr_t)
-#elif defined(__i386__)
-      offsetof(struct pt_regs, esp) / sizeof(uintptr_t)
-#elif defined(__arm__)
-      offsetof(struct pt_regs, ARM_sp) / sizeof(uintptr_t)
-#elif defined(__aarch64__)
-      offsetof(struct user_pt_regs, sp) / sizeof(uintptr_t)
-#elif defined(__mips__) || defined(__mips64__)
-      offsetof(struct pt_regs, regs[29]) / sizeof(uintptr_t)
-#else
-#error Unrecognized architecture
-#endif
-      ;
-
-  // TODO(ccross): use /proc/tid/status or /proc/pid/maps to get start_stack
-
-  thread_info.stack = std::pair<uintptr_t, uintptr_t>(regs[sp], 0);
-
-  return true;
-}
-
-int ThreadCaptureImpl::CaptureThread(pid_t tid) {
-  int ret = PtraceAttach(tid);
-  if (ret <= 0) {
-    return ret;
-  }
-
-  int status = 0;
-  if (TEMP_FAILURE_RETRY(waitpid(tid, &status, __WALL)) < 0) {
-    MEM_ALOGE("failed to wait for pause of thread %d of process %d: %s", tid, pid_, strerror(errno));
-    PtraceDetach(tid, 0);
-    return -1;
-  }
-
-  if (!WIFSTOPPED(status)) {
-    MEM_ALOGE("thread %d of process %d was not paused after waitpid, killed?", tid, pid_);
-    return 0;
-  }
-
-  unsigned int resume_signal = 0;
-
-  unsigned int signal = WSTOPSIG(status);
-  if ((status >> 16) == PTRACE_EVENT_STOP) {
-    switch (signal) {
-      case SIGSTOP:
-      case SIGTSTP:
-      case SIGTTIN:
-      case SIGTTOU:
-        // group-stop signals
-        break;
-      case SIGTRAP:
-        // normal ptrace interrupt stop
-        break;
-      default:
-        MEM_ALOGE("unexpected signal %d with PTRACE_EVENT_STOP for thread %d of process %d", signal,
-                  tid, pid_);
-        return -1;
-    }
-  } else {
-    // signal-delivery-stop
-    resume_signal = signal;
-  }
-
-  captured_threads_[tid] = resume_signal;
-  return 1;
-}
-
-bool ThreadCaptureImpl::ReleaseThread(pid_t tid) {
-  auto it = captured_threads_.find(tid);
-  if (it == captured_threads_.end()) {
-    return false;
-  }
-  return ReleaseThread(it->first, it->second);
-}
-
-bool ThreadCaptureImpl::ReleaseThread(pid_t tid, unsigned int signal) {
-  PtraceDetach(tid, signal);
-  return true;
-}
-
-bool ThreadCaptureImpl::ReleaseThreads() {
-  bool ret = true;
-  for (auto it = captured_threads_.begin(); it != captured_threads_.end();) {
-    if (ReleaseThread(it->first, it->second)) {
-      it = captured_threads_.erase(it);
-    } else {
-      it++;
-      ret = false;
-    }
-  }
-  return ret;
-}
-
-bool ThreadCaptureImpl::CapturedThreadInfo(ThreadInfoList& threads) {
-  threads.clear();
-
-  for (auto it = captured_threads_.begin(); it != captured_threads_.end(); it++) {
-    ThreadInfo t{0, allocator::vector<uintptr_t>(allocator_), std::pair<uintptr_t, uintptr_t>(0, 0)};
-    if (!PtraceThreadInfo(it->first, t)) {
-      return false;
-    }
-    threads.push_back(t);
-  }
-  return true;
-}
-
-ThreadCapture::ThreadCapture(pid_t pid, Allocator<ThreadCapture> allocator) {
-  Allocator<ThreadCaptureImpl> impl_allocator = allocator;
-  impl_ = impl_allocator.make_unique(pid, impl_allocator);
-}
-
-ThreadCapture::~ThreadCapture() {}
-
-bool ThreadCapture::ListThreads(TidList& tids) {
-  return impl_->ListThreads(tids);
-}
-
-bool ThreadCapture::CaptureThreads() {
-  return impl_->CaptureThreads();
-}
-
-bool ThreadCapture::ReleaseThreads() {
-  return impl_->ReleaseThreads();
-}
-
-bool ThreadCapture::ReleaseThread(pid_t tid) {
-  return impl_->ReleaseThread(tid);
-}
-
-bool ThreadCapture::CapturedThreadInfo(ThreadInfoList& threads) {
-  return impl_->CapturedThreadInfo(threads);
-}
-
-void ThreadCapture::InjectTestFunc(std::function<void(pid_t)>&& f) {
-  impl_->InjectTestFunc(std::forward<std::function<void(pid_t)>>(f));
-}
-
-}  // namespace android
diff --git a/libmemunreachable/ThreadCapture.h b/libmemunreachable/ThreadCapture.h
deleted file mode 100644
index 961cb60..0000000
--- a/libmemunreachable/ThreadCapture.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_THREAD_CAPTURE_H_
-#define LIBMEMUNREACHABLE_THREAD_CAPTURE_H_
-
-#include <utility>
-
-#include "Allocator.h"
-
-namespace android {
-
-struct ThreadInfo {
-  pid_t tid;
-  allocator::vector<uintptr_t> regs;
-  std::pair<uintptr_t, uintptr_t> stack;
-};
-
-using TidList = allocator::vector<pid_t>;
-using ThreadInfoList = allocator::vector<ThreadInfo>;
-
-class ThreadCaptureImpl;
-
-class ThreadCapture {
- public:
-  ThreadCapture(pid_t pid, Allocator<ThreadCapture> allocator);
-  ~ThreadCapture();
-
-  bool ListThreads(TidList& tids);
-  bool CaptureThreads();
-  bool ReleaseThreads();
-  bool ReleaseThread(pid_t tid);
-  bool CapturedThreadInfo(ThreadInfoList& threads);
-  void InjectTestFunc(std::function<void(pid_t)>&& f);
-
- private:
-  ThreadCapture(const ThreadCapture&) = delete;
-  void operator=(const ThreadCapture&) = delete;
-
-  Allocator<ThreadCaptureImpl>::unique_ptr impl_;
-};
-
-}  // namespace android
-
-#endif
diff --git a/libmemunreachable/bionic.h b/libmemunreachable/bionic.h
deleted file mode 100644
index dd1ec79..0000000
--- a/libmemunreachable/bionic.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_BIONIC_H_
-#define LIBMEMUNREACHABLE_BIONIC_H_
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <sys/cdefs.h>
-
-__BEGIN_DECLS
-
-/* Exported from bionic */
-extern void malloc_disable();
-extern void malloc_enable();
-extern int malloc_iterate(uintptr_t base, size_t size,
-                          void (*callback)(uintptr_t base, size_t size, void* arg), void* arg);
-extern ssize_t malloc_backtrace(void* pointer, uintptr_t* frames, size_t frame_count);
-
-__END_DECLS
-
-#endif  // LIBMEMUNREACHABLE_BIONIC_H_
diff --git a/libmemunreachable/include/memunreachable/memunreachable.h b/libmemunreachable/include/memunreachable/memunreachable.h
deleted file mode 100644
index 011443f..0000000
--- a/libmemunreachable/include/memunreachable/memunreachable.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
-#define LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
-
-#include <string.h>
-#include <sys/cdefs.h>
-
-#ifdef __cplusplus
-
-#include <string>
-#include <vector>
-
-namespace android {
-
-struct Leak {
-  uintptr_t begin = 0;
-  size_t size = 0;
-
-  size_t referenced_count = 0;
-  size_t referenced_size = 0;
-
-  size_t similar_count = 0;
-  size_t similar_size = 0;
-  size_t similar_referenced_count = 0;
-  size_t similar_referenced_size = 0;
-
-  size_t total_size = 0;
-
-  static const size_t contents_length = 32;
-  char contents[contents_length] = {};
-
-  struct Backtrace {
-    size_t num_frames = 0;
-
-    static const size_t max_frames = 16;
-    uintptr_t frames[max_frames] = {};
-
-    size_t reserved[8] = {};
-  } backtrace;
-
-  size_t reserved[8] = {};
-
-  std::string ToString(bool log_contents) const;
-};
-
-struct UnreachableMemoryInfo {
-  std::vector<Leak> leaks;
-  size_t num_leaks = 0;
-  size_t leak_bytes = 0;
-  size_t num_allocations = 0;
-  size_t allocation_bytes = 0;
-
-  size_t version = 0;  // Must be 0
-  size_t reserved[8] = {};
-
-  UnreachableMemoryInfo() {}
-  ~UnreachableMemoryInfo();
-
-  std::string ToString(bool log_contents) const;
-};
-
-bool GetUnreachableMemory(UnreachableMemoryInfo& info, size_t limit = 100);
-
-std::string GetUnreachableMemoryString(bool log_contents = false, size_t limit = 100);
-
-}  // namespace android
-
-#endif
-
-__BEGIN_DECLS
-
-bool LogUnreachableMemory(bool log_contents, size_t limit);
-
-bool NoLeaks();
-
-__END_DECLS
-
-#endif  // LIBMEMUNREACHABLE_MEMUNREACHABLE_H_
diff --git a/libmemunreachable/libmemunreachable.map b/libmemunreachable/libmemunreachable.map
deleted file mode 100644
index 0d0d954..0000000
--- a/libmemunreachable/libmemunreachable.map
+++ /dev/null
@@ -1,13 +0,0 @@
-LIBMEMUNREACHABLE {
-  global:
-    LogUnreachableMemory;
-    NoLeaks;
-    extern "C++" {
-      android::GetUnreachableMemory*;
-      android::GetUnreachableMemoryString*;
-      android::Leak::*;
-      android::UnreachableMemoryInfo::*;
-    };
-  local:
-    *;
-};
diff --git a/libmemunreachable/log.h b/libmemunreachable/log.h
deleted file mode 100644
index 44c5f85..0000000
--- a/libmemunreachable/log.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef LIBMEMUNREACHABLE_LOG_H_
-#define LIBMEMUNREACHABLE_LOG_H_
-
-#define LOG_TAG "libmemunreachable"
-
-#if defined(__ANDROID__)
-
-#include <async_safe/log.h>
-
-#define MEM_ALOGE(...) async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGW(...) async_safe_format_log(ANDROID_LOG_WARN, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGI(...) async_safe_format_log(ANDROID_LOG_INFO, LOG_TAG, ##__VA_ARGS__)
-#define MEM_ALOGV_IMPL(...) async_safe_format_log(ANDROID_LOG_VERBOSE, LOG_TAG, ##__VA_ARGS__)
-
-#ifdef NDEBUG
-#define MEM_ALOGV(...)             \
-  do {                             \
-    if (0) {                       \
-      MEM_ALOGV_IMPL(__VA_ARGS__); \
-    }                              \
-  } while (0)
-#else
-#define MEM_ALOGV(...) MEM_ALOGV_IMPL(__VA_ARGS__)
-#endif
-
-#define MEM_LOG_ALWAYS_FATAL(...) async_safe_fatal(__VA_ARGS__)
-
-#else
-
-#include <log/log.h>
-
-#define MEM_ALOGW ALOGW
-#define MEM_ALOGE ALOGE
-#define MEM_ALOGV ALOGV
-#define MEM_ALOGI ALOGI
-
-#define MEM_LOG_ALWAYS_FATAL LOG_ALWAYS_FATAL
-
-#endif
-
-#endif  // LIBMEMUNREACHABLE_LOG_H_
diff --git a/libmemunreachable/tests/Allocator_test.cpp b/libmemunreachable/tests/Allocator_test.cpp
deleted file mode 100644
index 8991a7b..0000000
--- a/libmemunreachable/tests/Allocator_test.cpp
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <Allocator.h>
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-
-namespace android {
-
-std::function<void()> ScopedAlarm::func_;
-
-class AllocatorTest : public testing::Test {
- protected:
-  AllocatorTest() : heap(), disable_malloc_() {}
-  virtual void SetUp() { heap_count = 0; }
-  virtual void TearDown() {
-    ASSERT_EQ(heap_count, 0);
-    ASSERT_TRUE(heap.empty());
-    ASSERT_FALSE(disable_malloc_.timed_out());
-  }
-  Heap heap;
-
- private:
-  ScopedDisableMallocTimeout disable_malloc_;
-};
-
-TEST_F(AllocatorTest, simple) {
-  Allocator<char[100]> allocator(heap);
-  void* ptr = allocator.allocate();
-  ASSERT_TRUE(ptr != NULL);
-  allocator.deallocate(ptr);
-}
-
-TEST_F(AllocatorTest, multiple) {
-  Allocator<char[100]> allocator(heap);
-  void* ptr1 = allocator.allocate();
-  ASSERT_TRUE(ptr1 != NULL);
-  void* ptr2 = allocator.allocate();
-  ASSERT_TRUE(ptr2 != NULL);
-  ASSERT_NE(ptr1, ptr2);
-  allocator.deallocate(ptr1);
-  void* ptr3 = allocator.allocate();
-  ASSERT_EQ(ptr1, ptr3);
-  allocator.deallocate(ptr3);
-  allocator.deallocate(ptr2);
-}
-
-TEST_F(AllocatorTest, many) {
-  const int num = 4096;
-  const int size = 128;
-  Allocator<char[size]> allocator(heap);
-  void* ptr[num];
-  for (int i = 0; i < num; i++) {
-    ptr[i] = allocator.allocate();
-    memset(ptr[i], 0xaa, size);
-    *(reinterpret_cast<unsigned char*>(ptr[i])) = i;
-  }
-
-  for (int i = 0; i < num; i++) {
-    for (int j = 0; j < num; j++) {
-      if (i != j) {
-        ASSERT_NE(ptr[i], ptr[j]);
-      }
-    }
-  }
-
-  for (int i = 0; i < num; i++) {
-    ASSERT_EQ(*(reinterpret_cast<unsigned char*>(ptr[i])), i & 0xFF);
-    allocator.deallocate(ptr[i]);
-  }
-}
-
-TEST_F(AllocatorTest, large) {
-  const size_t size = 1024 * 1024;
-  Allocator<char[size]> allocator(heap);
-  void* ptr = allocator.allocate();
-  memset(ptr, 0xaa, size);
-  allocator.deallocate(ptr);
-}
-
-TEST_F(AllocatorTest, many_large) {
-  const int num = 128;
-  const int size = 1024 * 1024;
-  Allocator<char[size]> allocator(heap);
-  void* ptr[num];
-  for (int i = 0; i < num; i++) {
-    ptr[i] = allocator.allocate();
-    memset(ptr[i], 0xaa, size);
-    *(reinterpret_cast<unsigned char*>(ptr[i])) = i;
-  }
-
-  for (int i = 0; i < num; i++) {
-    ASSERT_EQ(*(reinterpret_cast<unsigned char*>(ptr[i])), i & 0xFF);
-    allocator.deallocate(ptr[i]);
-  }
-}
-
-TEST_F(AllocatorTest, copy) {
-  Allocator<char[100]> a(heap);
-  Allocator<char[200]> b = a;
-  Allocator<char[300]> c(b);
-  Allocator<char[100]> d(a);
-  Allocator<char[100]> e(heap);
-
-  ASSERT_EQ(a, b);
-  ASSERT_EQ(a, c);
-  ASSERT_EQ(a, d);
-  ASSERT_EQ(a, e);
-
-  void* ptr1 = a.allocate();
-  void* ptr2 = b.allocate();
-  void* ptr3 = c.allocate();
-  void* ptr4 = d.allocate();
-
-  b.deallocate(ptr1);
-  d.deallocate(ptr2);
-  a.deallocate(ptr3);
-  c.deallocate(ptr4);
-}
-
-TEST_F(AllocatorTest, stl_vector) {
-  auto v = allocator::vector<int>(Allocator<int>(heap));
-  for (int i = 0; i < 1024; i++) {
-    v.push_back(i);
-  }
-  for (int i = 0; i < 1024; i++) {
-    ASSERT_EQ(v[i], i);
-  }
-  v.clear();
-}
-
-TEST_F(AllocatorTest, stl_list) {
-  auto v = allocator::list<int>(Allocator<int>(heap));
-  for (int i = 0; i < 1024; i++) {
-    v.push_back(i);
-  }
-  int i = 0;
-  for (auto iter = v.begin(); iter != v.end(); iter++, i++) {
-    ASSERT_EQ(*iter, i);
-  }
-  v.clear();
-}
-
-TEST_F(AllocatorTest, shared) {
-  Allocator<int> allocator(heap);
-
-  Allocator<int>::shared_ptr ptr = allocator.make_shared(0);
-  {
-    auto ptr2 = ptr;  // NOLINT, test copy of ptr
-  }
-  ASSERT_NE(ptr, nullptr);
-}
-
-TEST_F(AllocatorTest, unique) {
-  Allocator<int> allocator(heap);
-
-  Allocator<int>::unique_ptr ptr = allocator.make_unique(0);
-
-  ASSERT_NE(ptr, nullptr);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/Binder_test.cpp b/libmemunreachable/tests/Binder_test.cpp
deleted file mode 100644
index eaf7652..0000000
--- a/libmemunreachable/tests/Binder_test.cpp
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <binder/Binder.h>
-#include <binder/IBinder.h>
-#include <binder/IServiceManager.h>
-#include <binder/Parcel.h>
-#include <binder/ProcessState.h>
-
-#include <gtest/gtest.h>
-
-#include "Allocator.h"
-#include "Binder.h"
-
-namespace android {
-
-static const String16 service_name("test.libmemunreachable_binder");
-
-// Provides a service that will hold a strong reference to any remote binder
-// object, so that the test can verify that a remote strong reference is
-// visible to libmemunreachable.
-class BinderService : public BBinder {
- public:
-  BinderService() = default;
-  virtual ~BinderService() = default;
-
-  virtual status_t onTransact(uint32_t /*code*/, const Parcel& data, Parcel* reply,
-                              uint32_t /*flags*/ = 0) {
-    reply->writeStrongBinder(ref);
-    ref = data.readStrongBinder();
-    return 0;
-  }
-
- private:
-  sp<IBinder> ref;
-};
-
-class BinderObject : public BBinder {
- public:
-  BinderObject() = default;
-  ~BinderObject() = default;
-};
-
-// Forks a subprocess that registers a BinderService with the global binder
-// servicemanager.  Requires root permissions.
-class ServiceProcess {
- public:
-  ServiceProcess() : child_(0) {}
-  ~ServiceProcess() { Stop(); }
-
-  bool Run() {
-    pid_t ret = fork();
-    if (ret < 0) {
-      return false;
-    } else if (ret == 0) {
-      // child
-      _exit(Service());
-    } else {
-      // parent
-      child_ = ret;
-      return true;
-    }
-  }
-
-  bool Stop() {
-    if (child_ > 0) {
-      if (kill(child_, SIGTERM)) {
-        return false;
-      }
-      int status = 0;
-      if (TEMP_FAILURE_RETRY(waitpid(child_, &status, 0)) != child_) {
-        return false;
-      }
-      child_ = 0;
-      return WIFEXITED(status) && WEXITSTATUS(status) == 0;
-    }
-
-    return true;
-  }
-
-  int Service() {
-    sp<ProcessState> proc{ProcessState::self()};
-    sp<IServiceManager> sm = defaultServiceManager();
-    if (sm == nullptr) {
-      fprintf(stderr, "Failed to get service manager\n");
-      return 1;
-    }
-    // This step requires root permissions
-    if (sm->addService(service_name, new BinderService()) != OK) {
-      fprintf(stderr, "Failed to add test service\n");
-      return 1;
-    }
-    proc->startThreadPool();
-    pause();
-    return 0;
-  }
-
- private:
-  pid_t child_;
-};
-
-class MemunreachableBinderTest : public ::testing::Test {
- protected:
-  ServiceProcess service_process_;
-};
-
-// Tests that a local binder object with a remote strong reference is visible
-// through the libmemunreachable BinderReferences interface, which uses the
-// getBinderKernelReferences method in libbinder.  Starts a BinderService
-// through ServiceProcess as a remote service to hold the strong reference.
-TEST_F(MemunreachableBinderTest, binder) {
-  ASSERT_EQ(static_cast<uid_t>(0), getuid()) << "This test must be run as root.";
-
-  ServiceProcess service_process;
-  ASSERT_TRUE(service_process.Run());
-
-  sp<IServiceManager> sm = defaultServiceManager();
-  ASSERT_TRUE(sm != nullptr);
-
-  // A small sleep allows the service to start, which
-  // prevents a longer sleep in getService.
-  usleep(100000);
-
-  sp<IBinder> service = sm->getService(service_name);
-  ASSERT_TRUE(service != nullptr);
-
-  sp<IBinder> binder{new BinderObject()};
-
-  Parcel send;
-  Parcel reply;
-
-  send.writeStrongBinder(binder);
-  status_t rv = service->transact(0, send, &reply);
-  ASSERT_EQ(static_cast<status_t>(OK), rv);
-
-  Heap heap;
-  allocator::vector<uintptr_t> refs{heap};
-
-  ASSERT_TRUE(BinderReferences(refs));
-
-  bool found_ref = false;
-  for (auto ref : refs) {
-    if (ref == reinterpret_cast<uintptr_t>(binder.get())) {
-      found_ref = true;
-    }
-  }
-
-  ASSERT_TRUE(found_ref);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/DisableMalloc_test.cpp b/libmemunreachable/tests/DisableMalloc_test.cpp
deleted file mode 100644
index f446719..0000000
--- a/libmemunreachable/tests/DisableMalloc_test.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/time.h>
-
-#include <chrono>
-#include <functional>
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-class DisableMallocTest : public ::testing::Test {
- protected:
-  void alarm(std::chrono::microseconds us) {
-    std::chrono::seconds s = std::chrono::duration_cast<std::chrono::seconds>(us);
-    itimerval t = itimerval();
-    t.it_value.tv_sec = s.count();
-    t.it_value.tv_usec = (us - s).count();
-    setitimer(ITIMER_REAL, &t, NULL);
-  }
-};
-
-TEST_F(DisableMallocTest, reenable) {
-  ASSERT_EXIT(
-      {
-        alarm(100ms);
-        void* ptr1 = malloc(128);
-        ASSERT_NE(ptr1, nullptr);
-        free(ptr1);
-        { ScopedDisableMalloc disable_malloc; }
-        void* ptr2 = malloc(128);
-        ASSERT_NE(ptr2, nullptr);
-        free(ptr2);
-        _exit(1);
-      },
-      ::testing::ExitedWithCode(1), "");
-}
-
-TEST_F(DisableMallocTest, deadlock_allocate) {
-  ASSERT_DEATH(
-      {
-        void* ptr = malloc(128);
-        ASSERT_NE(ptr, nullptr);
-        free(ptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          void* ptr = malloc(128);
-          ASSERT_NE(ptr, nullptr);
-          free(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_new) {
-  ASSERT_DEATH(
-      {
-        // C++ allows `new Foo` to be replaced with a stack allocation or merged
-        // with future `new Foo` expressions, provided certain conditions are
-        // met [expr.new/10]. None of this applies to `operator new(size_t)`.
-        void* ptr = ::operator new(1);
-        ASSERT_NE(ptr, nullptr);
-        ::operator delete(ptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          void* ptr = ::operator new(1);
-          ASSERT_NE(ptr, nullptr);
-          ::operator delete(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_delete) {
-  ASSERT_DEATH(
-      {
-        void* ptr = ::operator new(1);
-        ASSERT_NE(ptr, nullptr);
-        {
-          alarm(250ms);
-          ScopedDisableMalloc disable_malloc;
-          ::operator delete(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_free) {
-  ASSERT_DEATH(
-      {
-        void* ptr = malloc(128);
-        ASSERT_NE(ptr, nullptr);
-        {
-          alarm(100ms);
-          ScopedDisableMalloc disable_malloc;
-          free(ptr);
-        }
-      },
-      "");
-}
-
-TEST_F(DisableMallocTest, deadlock_fork) {
-  ASSERT_DEATH({
-    {
-      alarm(100ms);
-      ScopedDisableMalloc disable_malloc;
-      fork();
-}
-}, "");
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/HeapWalker_test.cpp b/libmemunreachable/tests/HeapWalker_test.cpp
deleted file mode 100644
index 9610cd6..0000000
--- a/libmemunreachable/tests/HeapWalker_test.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include "HeapWalker.h"
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-#include "Allocator.h"
-
-namespace android {
-
-class HeapWalkerTest : public ::testing::Test {
- public:
-  HeapWalkerTest() : disable_malloc_(), heap_() {}
-
-  void TearDown() {
-    ASSERT_TRUE(heap_.empty());
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc_.timed_out());
-    }
-  }
-
- protected:
-  ScopedDisableMallocTimeout disable_malloc_;
-  Heap heap_;
-};
-
-TEST_F(HeapWalkerTest, allocation) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  ASSERT_TRUE(heap_walker.Allocation(6, 7));
-  ASSERT_TRUE(heap_walker.Allocation(0, 1));
-}
-
-TEST_F(HeapWalkerTest, overlap) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-  ASSERT_FALSE(heap_walker.Allocation(2, 3));
-  ASSERT_FALSE(heap_walker.Allocation(1, 3));
-  ASSERT_FALSE(heap_walker.Allocation(1, 4));
-  ASSERT_FALSE(heap_walker.Allocation(1, 5));
-  ASSERT_FALSE(heap_walker.Allocation(3, 4));
-  ASSERT_FALSE(heap_walker.Allocation(3, 5));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  ASSERT_TRUE(heap_walker.Allocation(1, 2));
-}
-
-TEST_F(HeapWalkerTest, zero) {
-  HeapWalker heap_walker(heap_);
-  ASSERT_TRUE(heap_walker.Allocation(2, 2));
-  ASSERT_FALSE(heap_walker.Allocation(2, 2));
-  ASSERT_TRUE(heap_walker.Allocation(3, 3));
-  ASSERT_TRUE(heap_walker.Allocation(1, 1));
-  ASSERT_FALSE(heap_walker.Allocation(2, 3));
-}
-
-TEST_F(HeapWalkerTest, mapping) {
-  HeapWalker heap_walker(heap_);
-  heap_walker.Mapping(2, 3);
-  heap_walker.Mapping(4, 5);
-  ASSERT_TRUE(heap_walker.Allocation(2, 3));
-  ASSERT_TRUE(heap_walker.Allocation(4, 5));
-  // space between mappings is not checked, but could be in the future
-  ASSERT_TRUE(heap_walker.Allocation(3, 4));
-
-  // re-enable malloc, ASSERT_DEATH may allocate
-  disable_malloc_.Enable();
-  ASSERT_DEATH({ heap_walker.Allocation(1, 2); }, "0x1-0x2.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(1, 3); }, "0x1-0x3.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(4, 6); }, "0x4-0x6.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(5, 6); }, "0x5-0x6.*outside.*0x2-0x5");
-  ASSERT_DEATH({ heap_walker.Allocation(1, 6); }, "0x1-0x6.*outside.*0x2-0x5");
-}
-
-#define buffer_begin(buffer) reinterpret_cast<uintptr_t>(buffer)
-#define buffer_end(buffer) (reinterpret_cast<uintptr_t>(buffer) + sizeof(buffer))
-
-TEST_F(HeapWalkerTest, leak) {
-  void* buffer1[16]{};
-  char buffer2[16]{};
-  buffer1[0] = &buffer2[0] - sizeof(void*);
-  buffer1[1] = &buffer2[15] + sizeof(void*);
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(1U, num_leaks);
-  EXPECT_EQ(16U, leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(buffer_begin(buffer2), leaked[0].begin);
-  EXPECT_EQ(buffer_end(buffer2), leaked[0].end);
-}
-
-TEST_F(HeapWalkerTest, live) {
-  const int from_buffer_entries = 4;
-  const int to_buffer_bytes = 16;
-
-  for (int i = 0; i < from_buffer_entries; i++) {
-    for (int j = 0; j < to_buffer_bytes; j++) {
-      void* buffer1[from_buffer_entries]{};
-      char buffer2[to_buffer_bytes]{};
-      buffer1[i] = &buffer2[j];
-
-      HeapWalker heap_walker(heap_);
-      heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-      heap_walker.Root(buffer_begin(buffer1), buffer_end(buffer1));
-
-      ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-      allocator::vector<Range> leaked(heap_);
-      size_t num_leaks = SIZE_MAX;
-      size_t leaked_bytes = SIZE_MAX;
-      ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-      EXPECT_EQ(0U, num_leaks);
-      EXPECT_EQ(0U, leaked_bytes);
-      EXPECT_EQ(0U, leaked.size());
-    }
-  }
-}
-
-TEST_F(HeapWalkerTest, unaligned) {
-  const int from_buffer_entries = 4;
-  const int to_buffer_bytes = 16;
-  void* buffer1[from_buffer_entries]{};
-  char buffer2[to_buffer_bytes]{};
-
-  buffer1[1] = &buffer2;
-
-  for (unsigned int i = 0; i < sizeof(uintptr_t); i++) {
-    for (unsigned int j = 0; j < sizeof(uintptr_t); j++) {
-      HeapWalker heap_walker(heap_);
-      heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-      heap_walker.Root(buffer_begin(buffer1) + i, buffer_end(buffer1) - j);
-
-      ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-      allocator::vector<Range> leaked(heap_);
-      size_t num_leaks = SIZE_MAX;
-      size_t leaked_bytes = SIZE_MAX;
-      ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-      EXPECT_EQ(0U, num_leaks);
-      EXPECT_EQ(0U, leaked_bytes);
-      EXPECT_EQ(0U, leaked.size());
-    }
-  }
-}
-
-TEST_F(HeapWalkerTest, cycle) {
-  void* buffer1;
-  void* buffer2;
-
-  buffer1 = &buffer2;
-  buffer2 = &buffer1;
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer1), buffer_end(buffer1));
-  heap_walker.Allocation(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-}
-
-TEST_F(HeapWalkerTest, segv) {
-  const size_t page_size = sysconf(_SC_PAGE_SIZE);
-  void* buffer1 = mmap(NULL, page_size, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
-  ASSERT_NE(buffer1, nullptr);
-  void* buffer2;
-
-  buffer2 = &buffer1;
-
-  HeapWalker heap_walker(heap_);
-  heap_walker.Allocation(buffer_begin(buffer1), buffer_begin(buffer1) + page_size);
-  heap_walker.Root(buffer_begin(buffer2), buffer_end(buffer2));
-
-  ASSERT_EQ(true, heap_walker.DetectLeaks());
-
-  allocator::vector<Range> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, heap_walker.Leaked(leaked, 100, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(0U, num_leaks);
-  EXPECT_EQ(0U, leaked_bytes);
-  ASSERT_EQ(0U, leaked.size());
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/LeakFolding_test.cpp b/libmemunreachable/tests/LeakFolding_test.cpp
deleted file mode 100644
index f5b3631..0000000
--- a/libmemunreachable/tests/LeakFolding_test.cpp
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "LeakFolding.h"
-#include "HeapWalker.h"
-
-#include <ScopedDisableMalloc.h>
-#include <gtest/gtest.h>
-#include "Allocator.h"
-
-namespace android {
-
-class LeakFoldingTest : public ::testing::Test {
- public:
-  LeakFoldingTest() : disable_malloc_(), heap_() {}
-
-  void TearDown() {
-    ASSERT_TRUE(heap_.empty());
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc_.timed_out());
-    }
-  }
-
- protected:
-  ScopedDisableMallocTimeout disable_malloc_;
-  Heap heap_;
-};
-
-#define buffer_begin(buffer) reinterpret_cast<uintptr_t>(&(buffer)[0])
-#define buffer_end(buffer) (reinterpret_cast<uintptr_t>(&(buffer)[0]) + sizeof(buffer))
-#define ALLOCATION(heap_walker, buffer) \
-  ASSERT_EQ(true, (heap_walker).Allocation(buffer_begin(buffer), buffer_end(buffer)))
-
-TEST_F(LeakFoldingTest, one) {
-  void* buffer1[1] = {nullptr};
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(1U, num_leaks);
-  EXPECT_EQ(sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(0U, leaked[0].referenced_count);
-  EXPECT_EQ(0U, leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two) {
-  void* buffer1[1] = {nullptr};
-  void* buffer2[1] = {nullptr};
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-  EXPECT_EQ(0U, leaked[0].referenced_count);
-  EXPECT_EQ(0U, leaked[0].referenced_size);
-  EXPECT_EQ(0U, leaked[1].referenced_count);
-  EXPECT_EQ(0U, leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, dominator) {
-  void* buffer1[1];
-  void* buffer2[1] = {nullptr};
-
-  buffer1[0] = buffer2;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(2U, num_leaks);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(1U, leaked[0].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, cycle) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-
-  buffer1[0] = buffer2;
-  buffer2[0] = buffer3;
-  buffer3[0] = buffer2;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(3U, num_leaks);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, dominator_cycle) {
-  void* buffer1[2] = {nullptr, nullptr};
-  void* buffer2[2];
-  void* buffer3[1] = {nullptr};
-
-  buffer1[0] = &buffer2;
-  buffer2[0] = &buffer1;
-  buffer2[1] = &buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(3U, num_leaks);
-  EXPECT_EQ(5 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(2U, leaked[1].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two_cycles) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1];
-  void* buffer5[1];
-  void* buffer6[1];
-
-  buffer1[0] = buffer3;
-  buffer2[0] = buffer5;
-  buffer3[0] = buffer4;
-  buffer4[0] = buffer3;
-  buffer5[0] = buffer6;
-  buffer6[0] = buffer5;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-  ALLOCATION(heap_walker, buffer5);
-  ALLOCATION(heap_walker, buffer6);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(6U, num_leaks);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(2U, leaked.size());
-  EXPECT_EQ(2U, leaked[0].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(2U, leaked[1].referenced_count);
-  EXPECT_EQ(2 * sizeof(uintptr_t), leaked[1].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, two_dominator_cycles) {
-  void* buffer1[1];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1];
-
-  buffer1[0] = buffer2;
-  buffer2[0] = buffer1;
-  buffer3[0] = buffer4;
-  buffer4[0] = buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(4 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(4U, leaked.size());
-  EXPECT_EQ(1U, leaked[0].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(1U, leaked[1].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[1].referenced_size);
-  EXPECT_EQ(1U, leaked[2].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[2].referenced_size);
-  EXPECT_EQ(1U, leaked[3].referenced_count);
-  EXPECT_EQ(sizeof(uintptr_t), leaked[3].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, giant_dominator_cycle) {
-  const size_t n = 1000;
-  void* buffer[n];
-
-  HeapWalker heap_walker(heap_);
-
-  for (size_t i = 0; i < n; i++) {
-    ASSERT_TRUE(heap_walker.Allocation(reinterpret_cast<uintptr_t>(&buffer[i]),
-                                       reinterpret_cast<uintptr_t>(&buffer[i + 1])));
-  }
-
-  for (size_t i = 0; i < n - 1; i++) {
-    buffer[i] = &buffer[i + 1];
-  }
-  buffer[n - 1] = &buffer[0];
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(n, num_leaks);
-  EXPECT_EQ(n * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1000U, leaked.size());
-  EXPECT_EQ(n - 1, leaked[0].referenced_count);
-  EXPECT_EQ((n - 1) * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, giant_cycle) {
-  const size_t n = 1000;
-  void* buffer[n];
-  void* buffer1[1];
-
-  HeapWalker heap_walker(heap_);
-
-  for (size_t i = 0; i < n - 1; i++) {
-    buffer[i] = &buffer[i + 1];
-  }
-  buffer[n - 1] = &buffer[0];
-
-  buffer1[0] = &buffer[0];
-
-  for (size_t i = 0; i < n; i++) {
-    ASSERT_TRUE(heap_walker.Allocation(reinterpret_cast<uintptr_t>(&buffer[i]),
-                                       reinterpret_cast<uintptr_t>(&buffer[i + 1])));
-  }
-
-  ALLOCATION(heap_walker, buffer1);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(n + 1, num_leaks);
-  EXPECT_EQ((n + 1) * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(n, leaked[0].referenced_count);
-  EXPECT_EQ(n * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, multipath) {
-  void* buffer1[2];
-  void* buffer2[1];
-  void* buffer3[1];
-  void* buffer4[1] = {nullptr};
-
-  //    1
-  //   / \
-  //  v   v
-  //  2   3
-  //   \ /
-  //    v
-  //    4
-
-  buffer1[0] = &buffer2;
-  buffer1[1] = &buffer3;
-  buffer2[0] = &buffer4;
-  buffer3[0] = &buffer4;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(5 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(1U, leaked.size());
-  EXPECT_EQ(3U, leaked[0].referenced_count);
-  EXPECT_EQ(3 * sizeof(uintptr_t), leaked[0].referenced_size);
-}
-
-TEST_F(LeakFoldingTest, multicycle) {
-  void* buffer1[2]{};
-  void* buffer2[2]{};
-  void* buffer3[2]{};
-  void* buffer4[2]{};
-
-  //    1
-  //   / ^
-  //  v   \
-  //  2 -> 3
-  //   \   ^
-  //    v /
-  //     4
-
-  buffer1[0] = &buffer2;
-  buffer2[0] = &buffer3;
-  buffer2[1] = &buffer4;
-  buffer3[0] = &buffer1;
-  buffer4[0] = &buffer3;
-
-  HeapWalker heap_walker(heap_);
-
-  ALLOCATION(heap_walker, buffer1);
-  ALLOCATION(heap_walker, buffer2);
-  ALLOCATION(heap_walker, buffer3);
-  ALLOCATION(heap_walker, buffer4);
-
-  LeakFolding folding(heap_, heap_walker);
-
-  ASSERT_TRUE(folding.FoldLeaks());
-
-  allocator::vector<LeakFolding::Leak> leaked(heap_);
-  size_t num_leaks = 0;
-  size_t leaked_bytes = 0;
-  ASSERT_EQ(true, folding.Leaked(leaked, &num_leaks, &leaked_bytes));
-
-  EXPECT_EQ(4U, num_leaks);
-  EXPECT_EQ(8 * sizeof(uintptr_t), leaked_bytes);
-  ASSERT_EQ(4U, leaked.size());
-  EXPECT_EQ(3U, leaked[0].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[0].referenced_size);
-  EXPECT_EQ(3U, leaked[1].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[1].referenced_size);
-  EXPECT_EQ(3U, leaked[2].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[2].referenced_size);
-  EXPECT_EQ(3U, leaked[3].referenced_count);
-  EXPECT_EQ(6 * sizeof(uintptr_t), leaked[3].referenced_size);
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/MemUnreachable_test.cpp b/libmemunreachable/tests/MemUnreachable_test.cpp
deleted file mode 100644
index 9cb1623..0000000
--- a/libmemunreachable/tests/MemUnreachable_test.cpp
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <fcntl.h>
-#include <stdlib.h>
-#include <sys/prctl.h>
-#include <unistd.h>
-
-#include <gtest/gtest.h>
-
-#include <memunreachable/memunreachable.h>
-
-#include "bionic.h"
-
-namespace android {
-
-class HiddenPointer {
- public:
-  // Since we're doing such a good job of hiding it, the static analyzer
-  // thinks that we're leaking this `malloc`. This is probably related to
-  // https://bugs.llvm.org/show_bug.cgi?id=34198. NOLINTNEXTLINE
-  explicit HiddenPointer(size_t size = 256) { Set(malloc(size)); }
-  ~HiddenPointer() { Free(); }
-  void* Get() { return reinterpret_cast<void*>(~ptr_); }
-  void Free() {
-    free(Get());
-    Set(nullptr);
-  }
-
- private:
-  void Set(void* ptr) { ptr_ = ~reinterpret_cast<uintptr_t>(ptr); }
-  volatile uintptr_t ptr_;
-};
-
-// Trick the compiler into thinking a value on the stack is still referenced.
-static void Ref(void** ptr) {
-  void** volatile storage;
-  storage = ptr;
-}
-
-class MemunreachableTest : public ::testing::Test {
- protected:
-  virtual void SetUp() {
-    CleanStack(8192);
-    CleanTcache();
-  }
-
-  virtual void TearDown() {
-    CleanStack(8192);
-    CleanTcache();
-  }
-
-  // Allocate a buffer on the stack and zero it to make sure there are no
-  // stray pointers from old test runs.
-  void __attribute__((noinline)) CleanStack(size_t size) {
-    void* buf = alloca(size);
-    memset(buf, 0, size);
-    Ref(&buf);
-  }
-
-  // Disable and re-enable malloc to flush the jemalloc tcache to make sure
-  // there are stray pointers from old test runs there.
-  void CleanTcache() {
-    malloc_disable();
-    malloc_enable();
-  }
-};
-
-TEST_F(MemunreachableTest, clean) {
-  UnreachableMemoryInfo info;
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-
-  ASSERT_TRUE(GetUnreachableMemory(info));
-  ASSERT_EQ(0U, info.leaks.size());
-}
-
-TEST_F(MemunreachableTest, stack) {
-  HiddenPointer hidden_ptr;
-
-  {
-    void* ptr = hidden_ptr.Get();
-    Ref(&ptr);
-
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-
-    ptr = nullptr;
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-void* g_ptr;
-
-TEST_F(MemunreachableTest, global) {
-  HiddenPointer hidden_ptr;
-
-  g_ptr = hidden_ptr.Get();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  g_ptr = nullptr;
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, tls) {
-  HiddenPointer hidden_ptr;
-  pthread_key_t key;
-  pthread_key_create(&key, nullptr);
-
-  pthread_setspecific(key, hidden_ptr.Get());
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  pthread_setspecific(key, nullptr);
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-
-  pthread_key_delete(key);
-}
-
-TEST_F(MemunreachableTest, twice) {
-  HiddenPointer hidden_ptr;
-
-  {
-    void* ptr = hidden_ptr.Get();
-    Ref(&ptr);
-
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-
-    ptr = nullptr;
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(1U, info.leaks.size());
-  }
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, log) {
-  HiddenPointer hidden_ptr;
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-
-  hidden_ptr.Free();
-
-  {
-    UnreachableMemoryInfo info;
-
-    ASSERT_TRUE(GetUnreachableMemory(info));
-    ASSERT_EQ(0U, info.leaks.size());
-  }
-}
-
-TEST_F(MemunreachableTest, notdumpable) {
-  if (getuid() == 0) {
-    // TODO(ccross): make this a skipped test when gtest supports them
-    printf("[ SKIP     ] Not testable when running as root\n");
-    return;
-  }
-
-  ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 0));
-
-  HiddenPointer hidden_ptr;
-
-  EXPECT_FALSE(LogUnreachableMemory(true, 100));
-
-  ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 1));
-}
-
-TEST_F(MemunreachableTest, leak_lots) {
-  std::vector<HiddenPointer> hidden_ptrs;
-  hidden_ptrs.resize(1024);
-
-  ASSERT_TRUE(LogUnreachableMemory(true, 100));
-}
-
-TEST_F(MemunreachableTest, version) {
-  UnreachableMemoryInfo info;
-  info.version = 1;
-
-  ASSERT_FALSE(GetUnreachableMemory(info));
-  ASSERT_EQ(0U, info.leaks.size());
-}
-
-}  // namespace android
diff --git a/libmemunreachable/tests/ThreadCapture_test.cpp b/libmemunreachable/tests/ThreadCapture_test.cpp
deleted file mode 100644
index 933d65a..0000000
--- a/libmemunreachable/tests/ThreadCapture_test.cpp
+++ /dev/null
@@ -1,351 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "ThreadCapture.h"
-
-#include <fcntl.h>
-#include <pthread.h>
-#include <sys/syscall.h>
-#include <sys/types.h>
-
-#include <algorithm>
-#include <functional>
-#include <memory>
-#include <thread>
-
-#include <gtest/gtest.h>
-
-#include "Allocator.h"
-#include "ScopedDisableMalloc.h"
-#include "ScopedPipe.h"
-
-#include <android-base/threads.h>
-
-using namespace std::chrono_literals;
-
-namespace android {
-
-class ThreadListTest : public ::testing::TestWithParam<int> {
- public:
-  ThreadListTest() : stop_(false) {}
-
-  ~ThreadListTest() {
-    // pthread_join may return before the entry in /proc/pid/task/ is gone,
-    // loop until ListThreads only finds the main thread so the next test
-    // doesn't fail.
-    WaitForThreads();
-  }
-
-  virtual void TearDown() { ASSERT_TRUE(heap.empty()); }
-
- protected:
-  template <class Function>
-  void StartThreads(unsigned int threads, Function&& func) {
-    threads_.reserve(threads);
-    tids_.reserve(threads);
-    for (unsigned int i = 0; i < threads; i++) {
-      threads_.emplace_back([&, threads, this]() {
-        {
-          std::lock_guard<std::mutex> lk(m_);
-          tids_.push_back(gettid());
-          if (tids_.size() == threads) {
-            cv_start_.notify_one();
-          }
-        }
-
-        func();
-
-        {
-          std::unique_lock<std::mutex> lk(m_);
-          cv_stop_.wait(lk, [&] { return stop_; });
-        }
-      });
-    }
-
-    {
-      std::unique_lock<std::mutex> lk(m_);
-      cv_start_.wait(lk, [&] { return tids_.size() == threads; });
-    }
-  }
-
-  void StopThreads() {
-    {
-      std::lock_guard<std::mutex> lk(m_);
-      stop_ = true;
-    }
-    cv_stop_.notify_all();
-
-    for (auto i = threads_.begin(); i != threads_.end(); i++) {
-      i->join();
-    }
-    threads_.clear();
-    tids_.clear();
-  }
-
-  std::vector<pid_t>& tids() { return tids_; }
-
-  Heap heap;
-
- private:
-  void WaitForThreads() {
-    auto tids = TidList{heap};
-    ThreadCapture thread_capture{getpid(), heap};
-
-    for (unsigned int i = 0; i < 100; i++) {
-      EXPECT_TRUE(thread_capture.ListThreads(tids));
-      if (tids.size() == 1) {
-        break;
-      }
-      std::this_thread::sleep_for(10ms);
-    }
-    EXPECT_EQ(1U, tids.size());
-  }
-
-  std::mutex m_;
-  std::condition_variable cv_start_;
-  std::condition_variable cv_stop_;
-  bool stop_;
-  std::vector<pid_t> tids_;
-
-  std::vector<std::thread> threads_;
-};
-
-TEST_F(ThreadListTest, list_one) {
-  ScopedDisableMallocTimeout disable_malloc;
-
-  ThreadCapture thread_capture(getpid(), heap);
-
-  auto expected_tids = allocator::vector<pid_t>(1, getpid(), heap);
-  auto list_tids = allocator::vector<pid_t>(heap);
-
-  ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-
-  ASSERT_EQ(expected_tids, list_tids);
-
-  if (!HasFailure()) {
-    ASSERT_FALSE(disable_malloc.timed_out());
-  }
-}
-
-TEST_P(ThreadListTest, list_some) {
-  const unsigned int threads = GetParam() - 1;
-
-  StartThreads(threads, []() {});
-  std::vector<pid_t> expected_tids = tids();
-  expected_tids.push_back(getpid());
-
-  auto list_tids = allocator::vector<pid_t>(heap);
-
-  {
-    ScopedDisableMallocTimeout disable_malloc;
-
-    ThreadCapture thread_capture(getpid(), heap);
-
-    ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-
-    if (!HasFailure()) {
-      ASSERT_FALSE(disable_malloc.timed_out());
-    }
-  }
-
-  StopThreads();
-
-  std::sort(list_tids.begin(), list_tids.end());
-  std::sort(expected_tids.begin(), expected_tids.end());
-
-  ASSERT_EQ(expected_tids.size(), list_tids.size());
-  EXPECT_TRUE(std::equal(expected_tids.begin(), expected_tids.end(), list_tids.begin()));
-}
-
-INSTANTIATE_TEST_CASE_P(ThreadListTest, ThreadListTest, ::testing::Values(1, 2, 10, 1024));
-
-class ThreadCaptureTest : public ThreadListTest {
- public:
-  ThreadCaptureTest() {}
-  ~ThreadCaptureTest() {}
-  void Fork(std::function<void()>&& child_init, std::function<void()>&& child_cleanup,
-            std::function<void(pid_t)>&& parent) {
-    ScopedPipe start_pipe;
-    ScopedPipe stop_pipe;
-
-    int pid = fork();
-
-    if (pid == 0) {
-      // child
-      child_init();
-      EXPECT_EQ(1, TEMP_FAILURE_RETRY(write(start_pipe.Sender(), "+", 1))) << strerror(errno);
-      char buf;
-      EXPECT_EQ(1, TEMP_FAILURE_RETRY(read(stop_pipe.Receiver(), &buf, 1))) << strerror(errno);
-      child_cleanup();
-      _exit(0);
-    } else {
-      // parent
-      ASSERT_GT(pid, 0);
-      char buf;
-      ASSERT_EQ(1, TEMP_FAILURE_RETRY(read(start_pipe.Receiver(), &buf, 1))) << strerror(errno);
-
-      parent(pid);
-
-      ASSERT_EQ(1, TEMP_FAILURE_RETRY(write(stop_pipe.Sender(), "+", 1))) << strerror(errno);
-      siginfo_t info{};
-      ASSERT_EQ(0, TEMP_FAILURE_RETRY(waitid(P_PID, pid, &info, WEXITED))) << strerror(errno);
-    }
-  }
-};
-
-TEST_P(ThreadCaptureTest, capture_some) {
-  const unsigned int threads = GetParam();
-
-  Fork(
-      [&]() {
-        // child init
-        StartThreads(threads - 1, []() {});
-      },
-      [&]() {
-        // child cleanup
-        StopThreads();
-      },
-      [&](pid_t child) {
-        // parent
-        ASSERT_GT(child, 0);
-
-        {
-          ScopedDisableMallocTimeout disable_malloc;
-
-          ThreadCapture thread_capture(child, heap);
-          auto list_tids = allocator::vector<pid_t>(heap);
-
-          ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-          ASSERT_EQ(threads, list_tids.size());
-
-          ASSERT_TRUE(thread_capture.CaptureThreads());
-
-          auto thread_info = allocator::vector<ThreadInfo>(heap);
-          ASSERT_TRUE(thread_capture.CapturedThreadInfo(thread_info));
-          ASSERT_EQ(threads, thread_info.size());
-          ASSERT_TRUE(thread_capture.ReleaseThreads());
-
-          if (!HasFailure()) {
-            ASSERT_FALSE(disable_malloc.timed_out());
-          }
-        }
-      });
-}
-
-INSTANTIATE_TEST_CASE_P(ThreadCaptureTest, ThreadCaptureTest, ::testing::Values(1, 2, 10, 1024));
-
-TEST_F(ThreadCaptureTest, capture_kill) {
-  int ret = fork();
-
-  if (ret == 0) {
-    // child
-    sleep(10);
-  } else {
-    // parent
-    ASSERT_GT(ret, 0);
-
-    {
-      ScopedDisableMallocTimeout disable_malloc;
-
-      ThreadCapture thread_capture(ret, heap);
-      thread_capture.InjectTestFunc([&](pid_t tid) {
-        tgkill(ret, tid, SIGKILL);
-        usleep(10000);
-      });
-      auto list_tids = allocator::vector<pid_t>(heap);
-
-      ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-      ASSERT_EQ(1U, list_tids.size());
-
-      ASSERT_FALSE(thread_capture.CaptureThreads());
-
-      if (!HasFailure()) {
-        ASSERT_FALSE(disable_malloc.timed_out());
-      }
-    }
-  }
-}
-
-TEST_F(ThreadCaptureTest, capture_signal) {
-  const int sig = SIGUSR1;
-
-  ScopedPipe pipe;
-
-  // For signal handler
-  static ScopedPipe* g_pipe;
-
-  Fork(
-      [&]() {
-        // child init
-        pipe.CloseReceiver();
-
-        g_pipe = &pipe;
-
-        struct sigaction act {};
-        act.sa_handler = [](int) {
-          char buf = '+';
-          write(g_pipe->Sender(), &buf, 1);
-          g_pipe->CloseSender();
-        };
-        sigaction(sig, &act, NULL);
-        sigset_t set;
-        sigemptyset(&set);
-        sigaddset(&set, sig);
-        pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-      },
-      [&]() {
-        // child cleanup
-        g_pipe = nullptr;
-        pipe.Close();
-      },
-      [&](pid_t child) {
-        // parent
-        ASSERT_GT(child, 0);
-        pipe.CloseSender();
-
-        {
-          ScopedDisableMallocTimeout disable_malloc;
-
-          ThreadCapture thread_capture(child, heap);
-          thread_capture.InjectTestFunc([&](pid_t tid) {
-            tgkill(child, tid, sig);
-            usleep(10000);
-          });
-          auto list_tids = allocator::vector<pid_t>(heap);
-
-          ASSERT_TRUE(thread_capture.ListThreads(list_tids));
-          ASSERT_EQ(1U, list_tids.size());
-
-          ASSERT_TRUE(thread_capture.CaptureThreads());
-
-          auto thread_info = allocator::vector<ThreadInfo>(heap);
-          ASSERT_TRUE(thread_capture.CapturedThreadInfo(thread_info));
-          ASSERT_EQ(1U, thread_info.size());
-          ASSERT_TRUE(thread_capture.ReleaseThreads());
-
-          usleep(100000);
-          char buf;
-          ASSERT_EQ(1, TEMP_FAILURE_RETRY(read(pipe.Receiver(), &buf, 1)));
-          ASSERT_EQ(buf, '+');
-
-          if (!HasFailure()) {
-            ASSERT_FALSE(disable_malloc.timed_out());
-          }
-        }
-      });
-}
-
-}  // namespace android
diff --git a/libmetricslogger/Android.bp b/libmetricslogger/Android.bp
deleted file mode 100644
index 7d7554b..0000000
--- a/libmetricslogger/Android.bp
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2017 The Android Open Source Project
-
-metricslogger_lib_src_files = [
-    "metrics_logger.cpp",
-]
-
-cc_defaults {
-    name: "metricslogger_defaults",
-
-    host_supported: true,
-
-    export_include_dirs: ["include"],
-    local_include_dirs: ["include"],
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libstatssocket",
-    ],
-    whole_static_libs: ["libgtest_prod"],
-
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-}
-
-// metricslogger shared library
-// -----------------------------------------------------------------------------
-cc_library {
-    name: "libmetricslogger",
-    srcs: metricslogger_lib_src_files,
-    defaults: ["metricslogger_defaults"],
-    export_shared_lib_headers: ["libstatssocket"],
-}
-
-// metricslogger shared library, debug
-// -----------------------------------------------------------------------------
-cc_library_shared {
-    name: "libmetricslogger_debug",
-    srcs: metricslogger_lib_src_files,
-    defaults: ["metricslogger_defaults"],
-
-    target: {
-        host: {
-            cflags: ["-UNDEBUG"],
-        },
-    },
-}
-
-// Native tests
-// -----------------------------------------------------------------------------
-cc_test {
-    name: "metricslogger_tests",
-    isolated: true,
-    defaults: ["metricslogger_defaults"],
-    shared_libs: [
-        "libbase",
-        "libmetricslogger_debug",
-    ],
-    srcs: [
-        "metrics_logger_test.cpp",
-    ],
-}
diff --git a/libmetricslogger/OWNERS b/libmetricslogger/OWNERS
deleted file mode 100644
index 6a6fba2..0000000
--- a/libmetricslogger/OWNERS
+++ /dev/null
@@ -1,2 +0,0 @@
-cwren@google.com
-jhawkins@google.com
diff --git a/libmetricslogger/include/metricslogger/metrics_logger.h b/libmetricslogger/include/metricslogger/metrics_logger.h
deleted file mode 100644
index 71c04a6..0000000
--- a/libmetricslogger/include/metricslogger/metrics_logger.h
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <log/log_event_list.h>
-#include <stats_event_list.h>
-#include <cstdint>
-#include <string>
-
-namespace android {
-namespace metricslogger {
-
-// Logs a Tron histogram metric named |event| containing |data| to the Tron log
-// buffer.
-void LogHistogram(const std::string& event, int32_t data);
-
-// Logs a Tron counter metric named |name| containing |val| count to the Tron
-// log buffer.
-void LogCounter(const std::string& name, int32_t val);
-
-// Logs a Tron multi_action with category|category| containing the string
-// |value| in the field |field|.
-void LogMultiAction(int32_t category, int32_t field, const std::string& value);
-
-// Logs a Tron complex event.
-//
-// A complex event can include data in a structure not suppored by the other
-// log event types above.
-//
-// Note that instances of this class are single use. You must call Record()
-// to write the event to the event log.
-class ComplexEventLogger {
-  private:
-    android_log_event_list logger;
-    stats_event_list stats_logger;
-
-  public:
-    // Create a complex event with category|category|.
-    explicit ComplexEventLogger(int category);
-    // Set the package name that this event originates from.
-    void SetPackageName(const std::string& package_name);
-    // Add tagged data to the event, with the given tag and integer value.
-    void AddTaggedData(int tag, int32_t value);
-    // Add tagged data to the event, with the given tag and string value.
-    void AddTaggedData(int tag, const std::string& value);
-    // Add tagged data to the event, with the given tag and integer value.
-    void AddTaggedData(int tag, int64_t value);
-    // Add tagged data to the event, with the given tag and float value.
-    void AddTaggedData(int tag, float value);
-    // Record this event. This method can only be used once per instance
-    // of ComplexEventLogger. Do not made any subsequent calls to AddTaggedData
-    // after recording an event.
-    void Record();
-};
-
-// TODO: replace these with the metric_logger.proto definitions
-enum {
-    LOGBUILDER_CATEGORY = 757,
-    LOGBUILDER_TYPE = 758,
-    LOGBUILDER_NAME = 799,
-    LOGBUILDER_BUCKET = 801,
-    LOGBUILDER_VALUE = 802,
-    LOGBUILDER_COUNTER = 803,
-    LOGBUILDER_HISTOGRAM = 804,
-    LOGBUILDER_PACKAGENAME = 806,
-
-    ACTION_BOOT = 1098,
-    FIELD_PLATFORM_REASON = 1099,
-
-    FIELD_DURATION_MILLIS = 1304,
-
-    FIELD_END_BATTERY_PERCENT = 1308,
-
-    ACTION_HIDDEN_API_ACCESSED = 1391,
-    FIELD_HIDDEN_API_ACCESS_METHOD = 1392,
-    FIELD_HIDDEN_API_ACCESS_DENIED = 1393,
-    FIELD_HIDDEN_API_SIGNATURE = 1394,
-
-    ACTION_USB_CONNECTOR_CONNECTED = 1422,
-    ACTION_USB_CONNECTOR_DISCONNECTED = 1423,
-    ACTION_USB_AUDIO_CONNECTED = 1424,
-    FIELD_USB_AUDIO_VIDPID = 1425,
-    ACTION_USB_AUDIO_DISCONNECTED = 1426,
-    ACTION_HARDWARE_FAILED = 1427,
-    FIELD_HARDWARE_TYPE = 1428,
-    FIELD_HARDWARE_FAILURE_CODE = 1429,
-    ACTION_PHYSICAL_DROP = 1430,
-    FIELD_CONFIDENCE_PERCENT = 1431,
-    FIELD_ACCEL_MILLI_G = 1432,
-    ACTION_BATTERY_HEALTH = 1433,
-    FIELD_BATTERY_HEALTH_SNAPSHOT_TYPE = 1434,
-    FIELD_BATTERY_TEMPERATURE_DECI_C = 1435,
-    FIELD_BATTERY_VOLTAGE_UV = 1436,
-    FIELD_BATTERY_OPEN_CIRCUIT_VOLTAGE_UV = 1437,
-    ACTION_BATTERY_CHARGE_CYCLES = 1438,
-    FIELD_BATTERY_CHARGE_CYCLES = 1439,
-
-    ACTION_SLOW_IO = 1442,
-    FIELD_IO_OPERATION_TYPE = 1443,
-    FIELD_IO_OPERATION_COUNT = 1444,
-    ACTION_SPEAKER_IMPEDANCE = 1445,
-    FIELD_SPEAKER_IMPEDANCE_MILLIOHMS = 1446,
-    FIELD_SPEAKER_LOCATION = 1447,
-    FIELD_BATTERY_RESISTANCE_UOHMS = 1448,
-    FIELD_BATTERY_CURRENT_UA = 1449,
-    FIELD_HARDWARE_LOCATION = 1450,
-    ACTION_BATTERY_CAUSED_SHUTDOWN = 1451,
-};
-
-enum {
-    TYPE_ACTION = 4,
-};
-
-enum {
-    ACCESS_METHOD_NONE = 0,
-    ACCESS_METHOD_REFLECTION = 1,
-    ACCESS_METHOD_JNI = 2,
-    ACCESS_METHOD_LINKING = 3,
-};
-
-enum HardwareType {
-    HARDWARE_UNKNOWN = 0,
-    HARDWARE_MICROPHONE = 1,
-    HARDWARE_CODEC = 2,
-    HARDWARE_SPEAKER = 3,
-    HARDWARE_FINGERPRINT = 4,
-};
-
-enum HardwareFailureCode {
-    HARDWARE_FAILURE_UNKNOWN = 0,
-    HARDWARE_FAILURE_COMPLETE = 1,
-    HARDWARE_FAILURE_SPEAKER_HIGH_Z = 2,
-    HARDWARE_FAILURE_SPEAKER_SHORT = 3,
-    HARDWARE_FAILURE_FINGERPRINT_SENSOR_BROKEN = 4,
-    HARDWARE_FAILURE_FINGERPRINT_TOO_MANY_DEAD_PIXELS = 5,
-};
-
-enum IoOperation {
-    IOOP_UNKNOWN = 0,
-    IOOP_READ = 1,
-    IOOP_WRITE = 2,
-    IOOP_UNMAP = 3,
-    IOOP_SYNC = 4,
-};
-
-}  // namespace metricslogger
-}  // namespace android
diff --git a/libmetricslogger/metrics_logger.cpp b/libmetricslogger/metrics_logger.cpp
deleted file mode 100644
index 2a1b137..0000000
--- a/libmetricslogger/metrics_logger.cpp
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "metricslogger/metrics_logger.h"
-
-#include <cstdlib>
-
-#include <android-base/chrono_utils.h>
-#include <log/event_tag_map.h>
-
-using namespace android;
-
-namespace {
-
-const static int kStatsEventTag = 1937006964;
-const static int kKeyValuePairAtomId = 83;
-#ifdef __ANDROID__
-EventTagMap* kEventTagMap = android_openEventTagMap(nullptr);
-const int kSysuiMultiActionTag = android_lookupEventTagNum(
-    kEventTagMap, "sysui_multi_action", "(content|4)", ANDROID_LOG_UNKNOWN);
-#else
-// android_openEventTagMap does not work on host builds.
-const int kSysuiMultiActionTag = 0;
-#endif
-
-int64_t getElapsedTimeNanoSinceBoot() {
-    return std::chrono::duration_cast<std::chrono::nanoseconds>(
-                   android::base::boot_clock::now().time_since_epoch())
-            .count();
-}
-
-}  // namespace
-
-namespace android {
-namespace metricslogger {
-
-// Mirror com.android.internal.logging.MetricsLogger#histogram().
-void LogHistogram(const std::string& event, int32_t data) {
-    android_log_event_list log(kSysuiMultiActionTag);
-    log << LOGBUILDER_CATEGORY << LOGBUILDER_HISTOGRAM << LOGBUILDER_NAME << event
-        << LOGBUILDER_BUCKET << data << LOGBUILDER_VALUE << 1 << LOG_ID_EVENTS;
-
-    stats_event_list stats_log(kStatsEventTag);
-    stats_log << getElapsedTimeNanoSinceBoot() << kKeyValuePairAtomId << LOGBUILDER_CATEGORY
-              << LOGBUILDER_HISTOGRAM << LOGBUILDER_NAME << event << LOGBUILDER_BUCKET << data
-              << LOGBUILDER_VALUE << 1;
-    stats_log.write(LOG_ID_STATS);
-}
-
-// Mirror com.android.internal.logging.MetricsLogger#count().
-void LogCounter(const std::string& name, int32_t val) {
-    android_log_event_list log(kSysuiMultiActionTag);
-    log << LOGBUILDER_CATEGORY << LOGBUILDER_COUNTER << LOGBUILDER_NAME << name << LOGBUILDER_VALUE
-        << val << LOG_ID_EVENTS;
-
-    stats_event_list stats_log(kStatsEventTag);
-    stats_log << getElapsedTimeNanoSinceBoot() << kKeyValuePairAtomId << LOGBUILDER_CATEGORY
-              << LOGBUILDER_COUNTER << LOGBUILDER_NAME << name << LOGBUILDER_VALUE << val;
-    stats_log.write(LOG_ID_STATS);
-}
-
-// Mirror com.android.internal.logging.MetricsLogger#action().
-void LogMultiAction(int32_t category, int32_t field, const std::string& value) {
-    android_log_event_list log(kSysuiMultiActionTag);
-    log << LOGBUILDER_CATEGORY << category << LOGBUILDER_TYPE << TYPE_ACTION
-        << field << value << LOG_ID_EVENTS;
-
-    stats_event_list stats_log(kStatsEventTag);
-    stats_log << getElapsedTimeNanoSinceBoot() << kKeyValuePairAtomId << LOGBUILDER_CATEGORY
-              << category << LOGBUILDER_TYPE << TYPE_ACTION << field << value;
-    stats_log.write(LOG_ID_STATS);
-}
-
-ComplexEventLogger::ComplexEventLogger(int category)
-    : logger(kSysuiMultiActionTag), stats_logger(kStatsEventTag) {
-    logger << LOGBUILDER_CATEGORY << category;
-    stats_logger << getElapsedTimeNanoSinceBoot() << kKeyValuePairAtomId << LOGBUILDER_CATEGORY
-                 << category;
-}
-
-void ComplexEventLogger::SetPackageName(const std::string& package_name) {
-    logger << LOGBUILDER_PACKAGENAME << package_name;
-    stats_logger << LOGBUILDER_PACKAGENAME << package_name;
-}
-
-void ComplexEventLogger::AddTaggedData(int tag, int32_t value) {
-    logger << tag << value;
-    stats_logger << tag << value;
-}
-
-void ComplexEventLogger::AddTaggedData(int tag, const std::string& value) {
-    logger << tag << value;
-    stats_logger << tag << value;
-}
-
-void ComplexEventLogger::AddTaggedData(int tag, int64_t value) {
-    logger << tag << value;
-    stats_logger << tag << value;
-}
-
-void ComplexEventLogger::AddTaggedData(int tag, float value) {
-    logger << tag << value;
-    stats_logger << tag << value;
-}
-
-void ComplexEventLogger::Record() {
-    logger << LOG_ID_EVENTS;
-    stats_logger.write(LOG_ID_STATS);
-}
-
-}  // namespace metricslogger
-}  // namespace android
diff --git a/libmetricslogger/metrics_logger_test.cpp b/libmetricslogger/metrics_logger_test.cpp
deleted file mode 100644
index 440645c..0000000
--- a/libmetricslogger/metrics_logger_test.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "metricslogger/metrics_logger.h"
-
-#include <gtest/gtest.h>
-
-TEST(MetricsLoggerTest, AddSingleBootEvent) {
-    android::metricslogger::LogHistogram("test_event", 42);
-    // TODO(jhawkins): Verify the EventLog is updated.
-}
-
-TEST(MetricsLoggerTest, AddCounterVal) {
-    android::metricslogger::LogCounter("test_count", 10);
-}
diff --git a/libmodprobe/include/modprobe/modprobe.h b/libmodprobe/include/modprobe/modprobe.h
index dcb4ffb..ee6ae7a 100644
--- a/libmodprobe/include/modprobe/modprobe.h
+++ b/libmodprobe/include/modprobe/modprobe.h
@@ -19,13 +19,14 @@
 #include <set>
 #include <string>
 #include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 class Modprobe {
   public:
     Modprobe(const std::vector<std::string>&);
 
-    bool LoadListedModules();
+    bool LoadListedModules(bool strict = true);
     bool LoadWithAliases(const std::string& module_name, bool strict,
                          const std::string& parameters = "");
     bool Remove(const std::string& module_name);
@@ -43,6 +44,9 @@
     bool Rmmod(const std::string& module_name);
     std::vector<std::string> GetDependencies(const std::string& module);
     bool ModuleExists(const std::string& module_name);
+    void AddOption(const std::string& module_name, const std::string& option_name,
+                   const std::string& value);
+    std::string GetKernelCmdline();
 
     bool ParseDepCallback(const std::string& base_path, const std::vector<std::string>& args);
     bool ParseAliasCallback(const std::vector<std::string>& args);
@@ -50,6 +54,7 @@
     bool ParseLoadCallback(const std::vector<std::string>& args);
     bool ParseOptionsCallback(const std::vector<std::string>& args);
     bool ParseBlacklistCallback(const std::vector<std::string>& args);
+    void ParseKernelCmdlineOptions();
     void ParseCfg(const std::string& cfg, std::function<bool(const std::vector<std::string>&)> f);
 
     std::vector<std::pair<std::string, std::string>> module_aliases_;
@@ -59,5 +64,6 @@
     std::vector<std::string> module_load_;
     std::unordered_map<std::string, std::string> module_options_;
     std::set<std::string> module_blacklist_;
+    std::unordered_set<std::string> module_loaded_;
     bool blacklist_enabled = false;
 };
diff --git a/libmodprobe/libmodprobe.cpp b/libmodprobe/libmodprobe.cpp
index 73ae15b..f22bbf1 100644
--- a/libmodprobe/libmodprobe.cpp
+++ b/libmodprobe/libmodprobe.cpp
@@ -238,6 +238,80 @@
     return;
 }
 
+void Modprobe::AddOption(const std::string& module_name, const std::string& option_name,
+                         const std::string& value) {
+    auto canonical_name = MakeCanonical(module_name);
+    auto options_iter = module_options_.find(canonical_name);
+    auto option_str = option_name + "=" + value;
+    if (options_iter != module_options_.end()) {
+        options_iter->second = options_iter->second + " " + option_str;
+    } else {
+        module_options_.emplace(canonical_name, option_str);
+    }
+}
+
+void Modprobe::ParseKernelCmdlineOptions(void) {
+    std::string cmdline = GetKernelCmdline();
+    std::string module_name = "";
+    std::string option_name = "";
+    std::string value = "";
+    bool in_module = true;
+    bool in_option = false;
+    bool in_value = false;
+    bool in_quotes = false;
+    int start = 0;
+
+    for (int i = 0; i < cmdline.size(); i++) {
+        if (cmdline[i] == '"') {
+            in_quotes = !in_quotes;
+        }
+
+        if (in_quotes) continue;
+
+        if (cmdline[i] == ' ') {
+            if (in_value) {
+                value = cmdline.substr(start, i - start);
+                if (!module_name.empty() && !option_name.empty()) {
+                    AddOption(module_name, option_name, value);
+                }
+            }
+            module_name = "";
+            option_name = "";
+            value = "";
+            in_value = false;
+            start = i + 1;
+            in_module = true;
+            continue;
+        }
+
+        if (cmdline[i] == '.') {
+            if (in_module) {
+                module_name = cmdline.substr(start, i - start);
+                start = i + 1;
+                in_module = false;
+            }
+            in_option = true;
+            continue;
+        }
+
+        if (cmdline[i] == '=') {
+            if (in_option) {
+                option_name = cmdline.substr(start, i - start);
+                start = i + 1;
+                in_option = false;
+            }
+            in_value = true;
+            continue;
+        }
+    }
+    if (in_value && !in_quotes) {
+        value = cmdline.substr(start, cmdline.size() - start);
+        if (!module_name.empty() && !option_name.empty()) {
+            AddOption(module_name, option_name, value);
+        }
+    }
+}
+
 Modprobe::Modprobe(const std::vector<std::string>& base_paths) {
     using namespace std::placeholders;
 
@@ -261,6 +335,7 @@
         ParseCfg(base_path + "/modules.blacklist", blacklist_callback);
     }
 
+    ParseKernelCmdlineOptions();
     android::base::SetMinimumLogSeverity(android::base::INFO);
 }
 
@@ -330,7 +405,12 @@
 
 bool Modprobe::LoadWithAliases(const std::string& module_name, bool strict,
                                const std::string& parameters) {
-    std::set<std::string> modules_to_load = {MakeCanonical(module_name)};
+    auto canonical_name = MakeCanonical(module_name);
+    if (module_loaded_.count(canonical_name)) {
+        return true;
+    }
+
+    std::set<std::string> modules_to_load = {canonical_name};
     bool module_loaded = false;
 
     // use aliases to expand list of modules to load (multiple modules
@@ -338,6 +418,7 @@
     for (const auto& [alias, aliased_module] : module_aliases_) {
         if (fnmatch(alias.c_str(), module_name.c_str(), 0) != 0) continue;
         LOG(VERBOSE) << "Found alias for '" << module_name << "': '" << aliased_module;
+        if (module_loaded_.count(MakeCanonical(aliased_module))) continue;
         modules_to_load.emplace(aliased_module);
     }
 
@@ -354,13 +435,15 @@
     return true;
 }
 
-bool Modprobe::LoadListedModules() {
+bool Modprobe::LoadListedModules(bool strict) {
+    auto ret = true;
     for (const auto& module : module_load_) {
         if (!LoadWithAliases(module, true)) {
-            return false;
+            ret = false;
+            if (strict) break;
         }
     }
-    return true;
+    return ret;
 }
 
 bool Modprobe::Remove(const std::string& module_name) {
diff --git a/libmodprobe/libmodprobe_ext.cpp b/libmodprobe/libmodprobe_ext.cpp
index 2efcac2..99472c1 100644
--- a/libmodprobe/libmodprobe_ext.cpp
+++ b/libmodprobe/libmodprobe_ext.cpp
@@ -17,11 +17,20 @@
 #include <sys/stat.h>
 #include <sys/syscall.h>
 
+#include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 
 #include <modprobe/modprobe.h>
 
+std::string Modprobe::GetKernelCmdline(void) {
+    std::string cmdline;
+    if (!android::base::ReadFileToString("/proc/cmdline", &cmdline)) {
+        return "";
+    }
+    return cmdline;
+}
+
 bool Modprobe::Insmod(const std::string& path_name, const std::string& parameters) {
     android::base::unique_fd fd(
             TEMP_FAILURE_RETRY(open(path_name.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC)));
@@ -30,8 +39,9 @@
         return false;
     }
 
+    auto canonical_name = MakeCanonical(path_name);
     std::string options = "";
-    auto options_iter = module_options_.find(MakeCanonical(path_name));
+    auto options_iter = module_options_.find(canonical_name);
     if (options_iter != module_options_.end()) {
         options = options_iter->second;
     }
@@ -44,6 +54,7 @@
     if (ret != 0) {
         if (errno == EEXIST) {
             // Module already loaded
+            module_loaded_.emplace(canonical_name);
             return true;
         }
         LOG(ERROR) << "Failed to insmod '" << path_name << "' with args '" << options << "'";
@@ -51,15 +62,18 @@
     }
 
     LOG(INFO) << "Loaded kernel module " << path_name;
+    module_loaded_.emplace(canonical_name);
     return true;
 }
 
 bool Modprobe::Rmmod(const std::string& module_name) {
-    int ret = syscall(__NR_delete_module, MakeCanonical(module_name).c_str(), O_NONBLOCK);
+    auto canonical_name = MakeCanonical(module_name);
+    int ret = syscall(__NR_delete_module, canonical_name.c_str(), O_NONBLOCK);
     if (ret != 0) {
         PLOG(ERROR) << "Failed to remove module '" << module_name << "'";
         return false;
     }
+    module_loaded_.erase(canonical_name);
     return true;
 }
 
diff --git a/libmodprobe/libmodprobe_ext_test.cpp b/libmodprobe/libmodprobe_ext_test.cpp
index 7d817b1..057dea3 100644
--- a/libmodprobe/libmodprobe_ext_test.cpp
+++ b/libmodprobe/libmodprobe_ext_test.cpp
@@ -29,6 +29,10 @@
 
 #include "libmodprobe_test.h"
 
+std::string Modprobe::GetKernelCmdline(void) {
+    return kernel_cmdline;
+}
+
 bool Modprobe::Insmod(const std::string& path_name, const std::string& parameters) {
     auto deps = GetDependencies(MakeCanonical(path_name));
     if (deps.empty()) {
@@ -57,7 +61,7 @@
 
 bool Modprobe::Rmmod(const std::string& module_name) {
     for (auto it = modules_loaded.begin(); it != modules_loaded.end(); it++) {
-        if (*it == module_name) {
+        if (*it == module_name || android::base::StartsWith(*it, module_name + " ")) {
             modules_loaded.erase(it);
             return true;
         }
diff --git a/libmodprobe/libmodprobe_test.cpp b/libmodprobe/libmodprobe_test.cpp
index a711631..879c7f2 100644
--- a/libmodprobe/libmodprobe_test.cpp
+++ b/libmodprobe/libmodprobe_test.cpp
@@ -31,7 +31,13 @@
 // Used by libmodprobe_ext_test to report which modules would have been loaded.
 std::vector<std::string> modules_loaded;
 
+// Used by libmodprobe_ext_test to fake a kernel commandline
+std::string kernel_cmdline;
+
 TEST(libmodprobe, Test) {
+    kernel_cmdline =
+            "flag1 flag2 test1.option1=50 test4.option3=\"set x\" test1.option2=60 "
+            "test8. test5.option1= test10.option1=1";
     test_modules = {
             "/test1.ko",  "/test2.ko",  "/test3.ko",  "/test4.ko",  "/test5.ko",
             "/test6.ko",  "/test7.ko",  "/test8.ko",  "/test9.ko",  "/test10.ko",
@@ -42,25 +48,33 @@
             "/test14.ko",
             "/test15.ko",
             "/test3.ko",
-            "/test4.ko",
-            "/test1.ko",
+            "/test4.ko option3=\"set x\"",
+            "/test1.ko option1=50 option2=60",
             "/test6.ko",
             "/test2.ko",
-            "/test5.ko",
+            "/test5.ko option1=",
             "/test8.ko",
             "/test7.ko param1=4",
             "/test9.ko param_x=1 param_y=2 param_z=3",
-            "/test10.ko",
+            "/test10.ko option1=1",
             "/test12.ko",
             "/test11.ko",
             "/test13.ko",
     };
 
     std::vector<std::string> expected_after_remove = {
-            "/test14.ko", "/test15.ko",         "/test1.ko",
-            "/test6.ko",  "/test2.ko",          "/test5.ko",
-            "/test8.ko",  "/test7.ko param1=4", "/test9.ko param_x=1 param_y=2 param_z=3",
-            "/test10.ko", "/test12.ko",         "/test11.ko",
+            "/test14.ko",
+            "/test15.ko",
+            "/test1.ko option1=50 option2=60",
+            "/test6.ko",
+            "/test2.ko",
+            "/test5.ko option1=",
+            "/test8.ko",
+            "/test7.ko param1=4",
+            "/test9.ko param_x=1 param_y=2 param_z=3",
+            "/test10.ko option1=1",
+            "/test12.ko",
+            "/test11.ko",
             "/test13.ko",
     };
 
diff --git a/libmodprobe/libmodprobe_test.h b/libmodprobe/libmodprobe_test.h
index a001b69..e7b949f 100644
--- a/libmodprobe/libmodprobe_test.h
+++ b/libmodprobe/libmodprobe_test.h
@@ -19,5 +19,6 @@
 #include <string>
 #include <vector>
 
+extern std::string kernel_cmdline;
 extern std::vector<std::string> test_modules;
 extern std::vector<std::string> modules_loaded;
diff --git a/libnetutils/ifc_utils.c b/libnetutils/ifc_utils.c
index a098d59..5999e39 100644
--- a/libnetutils/ifc_utils.c
+++ b/libnetutils/ifc_utils.c
@@ -113,6 +113,10 @@
     if (ret == 0) {
         memcpy(ss, ai->ai_addr, ai->ai_addrlen);
         freeaddrinfo(ai);
+    } else {
+        // Getaddrinfo has its own error codes. Convert to negative errno.
+        // There, the only thing that can reasonably happen is that the passed-in string is invalid.
+        ret = (ret == EAI_SYSTEM) ? -errno : -EINVAL;
     }
 
     return ret;
@@ -253,8 +257,8 @@
  *
  * Returns zero on success and negative errno on failure.
  */
-int ifc_act_on_address(int action, const char *name, const char *address,
-                       int prefixlen) {
+int ifc_act_on_address(int action, const char* name, const char* address, int prefixlen,
+                       bool nodad) {
     int ifindex, s, len, ret;
     struct sockaddr_storage ss;
     int saved_errno;
@@ -263,19 +267,13 @@
     struct {
         struct nlmsghdr n;
         struct ifaddrmsg r;
-        // Allow for IPv6 address, headers, IPv4 broadcast addr and padding.
-        char attrbuf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-                     NLMSG_ALIGN(sizeof(struct rtattr)) +
-                     NLMSG_ALIGN(INET6_ADDRLEN) +
-                     NLMSG_ALIGN(sizeof(struct rtattr)) +
-                     NLMSG_ALIGN(INET_ADDRLEN)];
+        // Allow for IPv4 or IPv6 address, headers, IPv4 broadcast address and padding.
+        char attrbuf[NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET6_ADDRLEN) +
+                     NLMSG_ALIGN(sizeof(struct rtattr)) + NLMSG_ALIGN(INET_ADDRLEN)];
     } req;
     struct rtattr *rta;
     struct nlmsghdr *nh;
     struct nlmsgerr *err;
-    char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-             NLMSG_ALIGN(sizeof(struct nlmsgerr)) +
-             NLMSG_ALIGN(sizeof(struct nlmsghdr))];
 
     // Get interface ID.
     ifindex = if_nametoindex(name);
@@ -313,6 +311,7 @@
 
     // Interface address message header.
     req.r.ifa_family = ss.ss_family;
+    req.r.ifa_flags = nodad ? IFA_F_NODAD : 0;
     req.r.ifa_prefixlen = prefixlen;
     req.r.ifa_index = ifindex;
 
@@ -344,6 +343,7 @@
         return -saved_errno;
     }
 
+    char buf[NLMSG_ALIGN(sizeof(struct nlmsgerr)) + sizeof(req)];
     len = recv(s, buf, sizeof(buf), 0);
     saved_errno = errno;
     close(s);
@@ -362,12 +362,14 @@
     return err->error;
 }
 
+// Returns zero on success and negative errno on failure.
 int ifc_add_address(const char *name, const char *address, int prefixlen) {
-    return ifc_act_on_address(RTM_NEWADDR, name, address, prefixlen);
+    return ifc_act_on_address(RTM_NEWADDR, name, address, prefixlen, /*nodad*/ false);
 }
 
+// Returns zero on success and negative errno on failure.
 int ifc_del_address(const char *name, const char * address, int prefixlen) {
-    return ifc_act_on_address(RTM_DELADDR, name, address, prefixlen);
+    return ifc_act_on_address(RTM_DELADDR, name, address, prefixlen, /*nodad*/ false);
 }
 
 /*
diff --git a/libnetutils/include/netutils/ifc.h b/libnetutils/include/netutils/ifc.h
index 3b27234..ee896ac 100644
--- a/libnetutils/include/netutils/ifc.h
+++ b/libnetutils/include/netutils/ifc.h
@@ -17,8 +17,9 @@
 #ifndef _NETUTILS_IFC_H_
 #define _NETUTILS_IFC_H_
 
-#include <sys/cdefs.h>
 #include <arpa/inet.h>
+#include <stdbool.h>
+#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
@@ -42,6 +43,8 @@
 
 extern int ifc_get_addr(const char *name, in_addr_t *addr);
 extern int ifc_set_addr(const char *name, in_addr_t addr);
+extern int ifc_act_on_address(int action, const char* name, const char* address, int prefixlen,
+                              bool nodad);
 extern int ifc_add_address(const char *name, const char *address,
                            int prefixlen);
 extern int ifc_del_address(const char *name, const char *address,
diff --git a/libprocessgroup/cgroup_map.cpp b/libprocessgroup/cgroup_map.cpp
index 20ae2be..2fc920b 100644
--- a/libprocessgroup/cgroup_map.cpp
+++ b/libprocessgroup/cgroup_map.cpp
@@ -71,7 +71,12 @@
     if (!HasValue()) return false;
 
     if (state_ == UNKNOWN) {
-        state_ = access(GetProcsFilePath("", 0, 0).c_str(), F_OK) == 0 ? USABLE : MISSING;
+        if (ACgroupController_getFlags != nullptr) {
+            uint32_t flags = ACgroupController_getFlags(controller_);
+            state_ = (flags & CGROUPRC_CONTROLLER_FLAG_MOUNTED) != 0 ? USABLE : MISSING;
+        } else {
+            state_ = access(GetProcsFilePath("", 0, 0).c_str(), F_OK) == 0 ? USABLE : MISSING;
+        }
     }
 
     return state_ == USABLE;
@@ -161,9 +166,16 @@
     auto controller_count = ACgroupFile_getControllerCount();
     for (uint32_t i = 0; i < controller_count; ++i) {
         const ACgroupController* controller = ACgroupFile_getController(i);
-        LOG(INFO) << "\t" << ACgroupController_getName(controller) << " ver "
-                  << ACgroupController_getVersion(controller) << " path "
-                  << ACgroupController_getPath(controller);
+        if (ACgroupController_getFlags != nullptr) {
+            LOG(INFO) << "\t" << ACgroupController_getName(controller) << " ver "
+                      << ACgroupController_getVersion(controller) << " path "
+                      << ACgroupController_getPath(controller) << " flags "
+                      << ACgroupController_getFlags(controller);
+        } else {
+            LOG(INFO) << "\t" << ACgroupController_getName(controller) << " ver "
+                      << ACgroupController_getVersion(controller) << " path "
+                      << ACgroupController_getPath(controller);
+        }
     }
 }
 
diff --git a/libprocessgroup/cgrouprc/cgroup_controller.cpp b/libprocessgroup/cgrouprc/cgroup_controller.cpp
index d064d31..5a326e5 100644
--- a/libprocessgroup/cgrouprc/cgroup_controller.cpp
+++ b/libprocessgroup/cgrouprc/cgroup_controller.cpp
@@ -27,6 +27,11 @@
     return controller->version();
 }
 
+uint32_t ACgroupController_getFlags(const ACgroupController* controller) {
+    CHECK(controller != nullptr);
+    return controller->flags();
+}
+
 const char* ACgroupController_getName(const ACgroupController* controller) {
     CHECK(controller != nullptr);
     return controller->name();
diff --git a/libprocessgroup/cgrouprc/include/android/cgrouprc.h b/libprocessgroup/cgrouprc/include/android/cgrouprc.h
index 0f6a9cd..0ce5123 100644
--- a/libprocessgroup/cgrouprc/include/android/cgrouprc.h
+++ b/libprocessgroup/cgrouprc/include/android/cgrouprc.h
@@ -66,10 +66,21 @@
         __INTRODUCED_IN(29);
 
 /**
- * Flag bitmask to be used when ACgroupController_getFlags can be exported
+ * Flag bitmask used in ACgroupController_getFlags
  */
 #define CGROUPRC_CONTROLLER_FLAG_MOUNTED 0x1
 
+#if __ANDROID_API__ >= __ANDROID_API_R__
+
+/**
+ * Returns the flags bitmask of the given controller.
+ * If the given controller is null, return 0.
+ */
+__attribute__((warn_unused_result, weak)) uint32_t ACgroupController_getFlags(
+        const ACgroupController*) __INTRODUCED_IN(30);
+
+#endif
+
 /**
  * Returns the name of the given controller.
  * If the given controller is null, return nullptr.
diff --git a/libprocessgroup/cgrouprc/libcgrouprc.llndk.txt b/libprocessgroup/cgrouprc/libcgrouprc.llndk.txt
index 91df392..ce5c419 100644
--- a/libprocessgroup/cgrouprc/libcgrouprc.llndk.txt
+++ b/libprocessgroup/cgrouprc/libcgrouprc.llndk.txt
@@ -9,3 +9,10 @@
   local:
     *;
 };
+
+LIBCGROUPRC_30 { # introduced=30
+  global:
+    ACgroupController_getFlags;
+  local:
+    *;
+};
diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index f73ec2d..0b38b6b 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -47,11 +47,14 @@
 // Return 0 and removes the cgroup if there are no longer any processes in it.
 // Returns -1 in the case of an error occurring or if there are processes still running
 // even after retrying for up to 200ms.
-int killProcessGroup(uid_t uid, int initialPid, int signal);
+// If max_processes is not nullptr, it returns the maximum number of processes seen in the cgroup
+// during the killing process.  Note that this can be 0 if all processes from the process group have
+// already been terminated.
+int killProcessGroup(uid_t uid, int initialPid, int signal, int* max_processes = nullptr);
 
 // Returns the same as killProcessGroup(), however it does not retry, which means
 // that it only returns 0 in the case that the cgroup exists and it contains no processes.
-int killProcessGroupOnce(uid_t uid, int initialPid, int signal);
+int killProcessGroupOnce(uid_t uid, int initialPid, int signal, int* max_processes = nullptr);
 
 int createProcessGroup(uid_t uid, int initialPid, bool memControl = false);
 
diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index 7b6dde2..6272664 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -301,7 +301,8 @@
     return feof(fd.get()) ? processes : -1;
 }
 
-static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries) {
+static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries,
+                            int* max_processes) {
     std::string cpuacct_path;
     std::string memory_path;
 
@@ -316,9 +317,16 @@
 
     std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();
 
+    if (max_processes != nullptr) {
+        *max_processes = 0;
+    }
+
     int retry = retries;
     int processes;
     while ((processes = DoKillProcessGroupOnce(cgroup, uid, initialPid, signal)) > 0) {
+        if (max_processes != nullptr && processes > *max_processes) {
+            *max_processes = processes;
+        }
         LOG(VERBOSE) << "Killed " << processes << " processes for processgroup " << initialPid;
         if (retry > 0) {
             std::this_thread::sleep_for(5ms);
@@ -359,12 +367,12 @@
     }
 }
 
-int killProcessGroup(uid_t uid, int initialPid, int signal) {
-    return KillProcessGroup(uid, initialPid, signal, 40 /*retries*/);
+int killProcessGroup(uid_t uid, int initialPid, int signal, int* max_processes) {
+    return KillProcessGroup(uid, initialPid, signal, 40 /*retries*/, max_processes);
 }
 
-int killProcessGroupOnce(uid_t uid, int initialPid, int signal) {
-    return KillProcessGroup(uid, initialPid, signal, 0 /*retries*/);
+int killProcessGroupOnce(uid_t uid, int initialPid, int signal, int* max_processes) {
+    return KillProcessGroup(uid, initialPid, signal, 0 /*retries*/, max_processes);
 }
 
 int createProcessGroup(uid_t uid, int initialPid, bool memControl) {
diff --git a/libprocessgroup/profiles/cgroups.json b/libprocessgroup/profiles/cgroups.json
index 5871a63..0341902 100644
--- a/libprocessgroup/profiles/cgroups.json
+++ b/libprocessgroup/profiles/cgroups.json
@@ -39,6 +39,13 @@
       "Mode": "0755",
       "UID": "system",
       "GID": "system"
+    },
+    {
+      "Controller": "freezer",
+      "Path": "/dev/freezer",
+      "Mode": "0755",
+      "UID": "system",
+      "GID": "system"
     }
   ],
   "Cgroups2": {
diff --git a/libprocessgroup/profiles/task_profiles.json b/libprocessgroup/profiles/task_profiles.json
index 608f007..3f08535 100644
--- a/libprocessgroup/profiles/task_profiles.json
+++ b/libprocessgroup/profiles/task_profiles.json
@@ -43,12 +43,12 @@
     {
       "Name": "UClampMin",
       "Controller": "cpu",
-      "File": "cpu.util.min"
+      "File": "cpu.uclamp.min"
     },
     {
       "Name": "UClampMax",
       "Controller": "cpu",
-      "File": "cpu.util.max"
+      "File": "cpu.uclamp.max"
     }
   ],
 
@@ -67,6 +67,32 @@
       ]
     },
     {
+      "Name": "Frozen",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "freezer",
+            "Path": "frozen"
+          }
+        }
+      ]
+    },
+    {
+      "Name": "Unfrozen",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "freezer",
+            "Path": ""
+          }
+        }
+      ]
+    },
+    {
       "Name": "NormalPerformance",
       "Actions": [
         {
diff --git a/libprocessgroup/profiles/test.cpp b/libprocessgroup/profiles/test.cpp
index bc9aade..b37e3e6 100644
--- a/libprocessgroup/profiles/test.cpp
+++ b/libprocessgroup/profiles/test.cpp
@@ -33,14 +33,14 @@
 }
 
 // Test suite instantiations
-INSTANTIATE_TEST_SUITE_P(, JsonSchemaTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, JsonSchemaTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json"),
                                            MakeTestParam<TaskProfiles>("/task_profiles.json")));
-INSTANTIATE_TEST_SUITE_P(, CgroupsTest,
+INSTANTIATE_TEST_SUITE_P(Cgroups, CgroupsTest,
                          ::testing::Values(MakeTestParam<Cgroups>("/cgroups.json"),
                                            MakeTestParam<Cgroups>("/cgroups.recovery.json")));
-INSTANTIATE_TEST_SUITE_P(, TaskProfilesTest,
+INSTANTIATE_TEST_SUITE_P(TaskProfiles, TaskProfilesTest,
                          ::testing::Values(MakeTestParam<TaskProfiles>("/task_profiles.json")));
 
 }  // namespace profiles
diff --git a/libprocessgroup/sched_policy.cpp b/libprocessgroup/sched_policy.cpp
index 16339d3..698e74d 100644
--- a/libprocessgroup/sched_policy.cpp
+++ b/libprocessgroup/sched_policy.cpp
@@ -138,8 +138,17 @@
     return enabled;
 }
 
+static bool schedtune_enabled() {
+    return (CgroupMap::GetInstance().FindController("schedtune").IsUsable());
+}
+
+static bool cpuctl_enabled() {
+    return (CgroupMap::GetInstance().FindController("cpu").IsUsable());
+}
+
 bool schedboost_enabled() {
-    static bool enabled = (CgroupMap::GetInstance().FindController("schedtune").IsUsable());
+    static bool enabled = schedtune_enabled() || cpuctl_enabled();
+
     return enabled;
 }
 
@@ -162,7 +171,9 @@
 
     std::string group;
     if (schedboost_enabled()) {
-        if (getCGroupSubsys(tid, "schedtune", group) < 0) return -1;
+        if ((getCGroupSubsys(tid, "schedtune", group) < 0) &&
+            (getCGroupSubsys(tid, "cpu", group) < 0))
+		return -1;
     }
     if (group.empty() && cpusets_enabled()) {
         if (getCGroupSubsys(tid, "cpuset", group) < 0) return -1;
diff --git a/libprocessgroup/task_profiles.cpp b/libprocessgroup/task_profiles.cpp
index 9447f86..72f01af 100644
--- a/libprocessgroup/task_profiles.cpp
+++ b/libprocessgroup/task_profiles.cpp
@@ -288,6 +288,11 @@
     return true;
 }
 
+void TaskProfile::MoveTo(TaskProfile* profile) {
+    profile->elements_ = std::move(elements_);
+    profile->res_cached_ = res_cached_;
+}
+
 bool TaskProfile::ExecuteForProcess(uid_t uid, pid_t pid) const {
     for (const auto& element : elements_) {
         if (!element->ExecuteForProcess(uid, pid)) {
@@ -458,7 +463,15 @@
                 LOG(WARNING) << "Unknown profile action: " << action_name;
             }
         }
-        profiles_[profile_name] = profile;
+        auto iter = profiles_.find(profile_name);
+        if (iter == profiles_.end()) {
+            profiles_[profile_name] = profile;
+        } else {
+            // Move the content rather that replace the profile because old profile might be
+            // referenced from an aggregate profile if vendor overrides task profiles
+            profile->MoveTo(iter->second.get());
+            profile.reset();
+        }
     }
 
     const Json::Value& aggregateprofiles_val = root["AggregateProfiles"];
diff --git a/libprocessgroup/task_profiles.h b/libprocessgroup/task_profiles.h
index 9f2308c..a64ca50 100644
--- a/libprocessgroup/task_profiles.h
+++ b/libprocessgroup/task_profiles.h
@@ -143,6 +143,7 @@
     TaskProfile() : res_cached_(false) {}
 
     void Add(std::unique_ptr<ProfileAction> e) { elements_.push_back(std::move(e)); }
+    void MoveTo(TaskProfile* profile);
 
     bool ExecuteForProcess(uid_t uid, pid_t pid) const;
     bool ExecuteForTask(int tid) const;
diff --git a/libprocinfo/process.cpp b/libprocinfo/process.cpp
index 9194cf3..2efd49c 100644
--- a/libprocinfo/process.cpp
+++ b/libprocinfo/process.cpp
@@ -59,7 +59,6 @@
     case 'Z':
       return kProcessStateZombie;
     default:
-      LOG(ERROR) << "unknown process state: " << *state;
       return kProcessStateUnknown;
   }
 }
diff --git a/libsparse/Android.bp b/libsparse/Android.bp
index 88146e9..135904b 100644
--- a/libsparse/Android.bp
+++ b/libsparse/Android.bp
@@ -3,6 +3,7 @@
 cc_library {
     name: "libsparse",
     host_supported: true,
+    ramdisk_available: true,
     recovery_available: true,
     unique_host_soname: true,
     srcs: [
diff --git a/libsparse/output_file.cpp b/libsparse/output_file.cpp
index c5c4960..e35cb0d 100644
--- a/libsparse/output_file.cpp
+++ b/libsparse/output_file.cpp
@@ -493,6 +493,10 @@
 
 void output_file_close(struct output_file* out) {
   out->sparse_ops->write_end_chunk(out);
+  free(out->zero_buf);
+  free(out->fill_buf);
+  out->zero_buf = nullptr;
+  out->fill_buf = nullptr;
   out->ops->close(out);
 }
 
diff --git a/libstats/Android.bp b/libstats/Android.bp
deleted file mode 100644
index f5ee1da..0000000
--- a/libstats/Android.bp
+++ /dev/null
@@ -1,39 +0,0 @@
-//
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-// ==========================================================
-// Native library to write stats log to statsd socket
-// ==========================================================
-cc_library {
-    name: "libstatssocket",
-    srcs: [
-        "stats_event_list.c",
-        "statsd_writer.c",
-    ],
-    host_supported: true,
-    cflags: [
-        "-Wall",
-        "-Werror",
-        "-DLIBLOG_LOG_TAG=1006",
-        "-DWRITE_TO_STATSD=1",
-        "-DWRITE_TO_LOGD=0",
-    ],
-    export_include_dirs: ["include"],
-    shared_libs: [
-        "libcutils",
-        "liblog",
-    ],
-}
diff --git a/libstats/OWNERS b/libstats/OWNERS
index ed06fbc..7855774 100644
--- a/libstats/OWNERS
+++ b/libstats/OWNERS
@@ -1,4 +1,7 @@
-bookatz@google.com
 joeo@google.com
+muhammadq@google.com
+ruchirr@google.com
+singhtejinder@google.com
+tsaichristine@google.com
 yaochen@google.com
-yanglu@google.com
+yro@google.com
diff --git a/libstats/push_compat/Android.bp b/libstats/push_compat/Android.bp
new file mode 100644
index 0000000..465c05a
--- /dev/null
+++ b/libstats/push_compat/Android.bp
@@ -0,0 +1,59 @@
+//
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// =========================================================================
+// Native library that toggles between the old and new statsd socket
+// protocols. This library should only be used by DNS resolver or other
+// native modules on Q that log pushed atoms to statsd.
+// =========================================================================
+cc_defaults {
+    name: "libstatspush_compat_defaults",
+    srcs: [
+        "statsd_writer.c",
+        "stats_event_list.c",
+        "StatsEventCompat.cpp"
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-DWRITE_TO_STATSD=1",
+        "-DWRITE_TO_LOGD=0",
+    ],
+    header_libs: ["libstatssocket_headers"],
+    static_libs: [
+        "libbase",
+        "liblog",
+        "libutils",
+    ],
+}
+
+cc_library {
+    name: "libstatspush_compat",
+    defaults: ["libstatspush_compat_defaults"],
+    export_include_dirs: ["include"],
+    static_libs: ["libgtest_prod"],
+}
+
+cc_test {
+    name: "libstatspush_compat_test",
+    defaults: ["libstatspush_compat_defaults"],
+    test_suites: ["device_tests"],
+    srcs: [
+        "tests/StatsEventCompat_test.cpp",
+    ],
+    static_libs: ["libgmock"],
+}
+
diff --git a/libstats/push_compat/StatsEventCompat.cpp b/libstats/push_compat/StatsEventCompat.cpp
new file mode 100644
index 0000000..edfa070
--- /dev/null
+++ b/libstats/push_compat/StatsEventCompat.cpp
@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/StatsEventCompat.h"
+#include <android-base/properties.h>
+#include <android/api-level.h>
+#include <android/log.h>
+#include <dlfcn.h>
+#include <utils/SystemClock.h>
+
+using android::base::GetProperty;
+
+const static int kStatsEventTag = 1937006964;
+
+/* Checking ro.build.version.release is fragile, as the release field is
+ * an opaque string without structural guarantees. However, testing confirms
+ * that on Q devices, the property is "10," and on R, it is "R." Until
+ * android_get_device_api_level() is updated, this is the only solution.
+ *
+ * TODO(b/146019024): migrate to android_get_device_api_level()
+ */
+const bool StatsEventCompat::mPlatformAtLeastR =
+        GetProperty("ro.build.version.codename", "") == "R" ||
+        android_get_device_api_level() > __ANDROID_API_Q__;
+
+// definitions of static class variables
+bool StatsEventCompat::mAttemptedLoad = false;
+struct stats_event_api_table* StatsEventCompat::mStatsEventApi = nullptr;
+std::mutex StatsEventCompat::mLoadLock;
+
+StatsEventCompat::StatsEventCompat() : mEventQ(kStatsEventTag) {
+    // guard loading because StatsEventCompat might be called from multithreaded
+    // environment
+    {
+        std::lock_guard<std::mutex> lg(mLoadLock);
+        if (!mAttemptedLoad) {
+            void* handle = dlopen("libstatssocket.so", RTLD_NOW);
+            if (handle) {
+                mStatsEventApi = (struct stats_event_api_table*)dlsym(handle, "table");
+            } else {
+                ALOGE("dlopen failed: %s\n", dlerror());
+            }
+        }
+        mAttemptedLoad = true;
+    }
+
+    if (mStatsEventApi) {
+        mEventR = mStatsEventApi->obtain();
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << android::elapsedRealtimeNano();
+    }
+}
+
+StatsEventCompat::~StatsEventCompat() {
+    if (mStatsEventApi) mStatsEventApi->release(mEventR);
+}
+
+void StatsEventCompat::setAtomId(int32_t atomId) {
+    if (mStatsEventApi) {
+        mStatsEventApi->set_atom_id(mEventR, (uint32_t)atomId);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << atomId;
+    }
+}
+
+void StatsEventCompat::writeInt32(int32_t value) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_int32(mEventR, value);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << value;
+    }
+}
+
+void StatsEventCompat::writeInt64(int64_t value) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_int64(mEventR, value);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << value;
+    }
+}
+
+void StatsEventCompat::writeFloat(float value) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_float(mEventR, value);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << value;
+    }
+}
+
+void StatsEventCompat::writeBool(bool value) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_bool(mEventR, value);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << value;
+    }
+}
+
+void StatsEventCompat::writeByteArray(const char* buffer, size_t length) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_byte_array(mEventR, (const uint8_t*)buffer, length);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ.AppendCharArray(buffer, length);
+    }
+}
+
+void StatsEventCompat::writeString(const char* value) {
+    if (value == nullptr) value = "";
+
+    if (mStatsEventApi) {
+        mStatsEventApi->write_string8(mEventR, value);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ << value;
+    }
+}
+
+void StatsEventCompat::writeAttributionChain(const int32_t* uids, size_t numUids,
+                                             const vector<const char*>& tags) {
+    if (mStatsEventApi) {
+        mStatsEventApi->write_attribution_chain(mEventR, (const uint32_t*)uids, tags.data(),
+                                                (uint8_t)numUids);
+    } else if (!mPlatformAtLeastR) {
+        mEventQ.begin();
+        for (size_t i = 0; i < numUids; i++) {
+            mEventQ.begin();
+            mEventQ << uids[i];
+            const char* tag = tags[i] ? tags[i] : "";
+            mEventQ << tag;
+            mEventQ.end();
+        }
+        mEventQ.end();
+    }
+}
+
+void StatsEventCompat::writeKeyValuePairs(const map<int, int32_t>& int32Map,
+                                          const map<int, int64_t>& int64Map,
+                                          const map<int, const char*>& stringMap,
+                                          const map<int, float>& floatMap) {
+    if (mStatsEventApi) {
+        vector<struct key_value_pair> pairs;
+
+        for (const auto& it : int32Map) {
+            pairs.push_back({.key = it.first, .valueType = INT32_TYPE, .int32Value = it.second});
+        }
+        for (const auto& it : int64Map) {
+            pairs.push_back({.key = it.first, .valueType = INT64_TYPE, .int64Value = it.second});
+        }
+        for (const auto& it : stringMap) {
+            pairs.push_back({.key = it.first, .valueType = STRING_TYPE, .stringValue = it.second});
+        }
+        for (const auto& it : floatMap) {
+            pairs.push_back({.key = it.first, .valueType = FLOAT_TYPE, .floatValue = it.second});
+        }
+
+        mStatsEventApi->write_key_value_pairs(mEventR, pairs.data(), (uint8_t)pairs.size());
+    }
+
+    else if (!mPlatformAtLeastR) {
+        mEventQ.begin();
+        writeKeyValuePairMap(int32Map);
+        writeKeyValuePairMap(int64Map);
+        writeKeyValuePairMap(stringMap);
+        writeKeyValuePairMap(floatMap);
+        mEventQ.end();
+    }
+}
+
+template <class T>
+void StatsEventCompat::writeKeyValuePairMap(const map<int, T>& keyValuePairMap) {
+    for (const auto& it : keyValuePairMap) {
+        mEventQ.begin();
+        mEventQ << it.first;
+        mEventQ << it.second;
+        mEventQ.end();
+    }
+}
+
+// explicitly specify which types we're going to use
+template void StatsEventCompat::writeKeyValuePairMap<int32_t>(const map<int, int32_t>&);
+template void StatsEventCompat::writeKeyValuePairMap<int64_t>(const map<int, int64_t>&);
+template void StatsEventCompat::writeKeyValuePairMap<float>(const map<int, float>&);
+template void StatsEventCompat::writeKeyValuePairMap<const char*>(const map<int, const char*>&);
+
+void StatsEventCompat::addBoolAnnotation(uint8_t annotationId, bool value) {
+    if (mStatsEventApi) mStatsEventApi->add_bool_annotation(mEventR, annotationId, value);
+    // Don't do anything if on Q.
+}
+
+void StatsEventCompat::addInt32Annotation(uint8_t annotationId, int32_t value) {
+    if (mStatsEventApi) mStatsEventApi->add_int32_annotation(mEventR, annotationId, value);
+    // Don't do anything if on Q.
+}
+
+int StatsEventCompat::writeToSocket() {
+    if (mStatsEventApi) {
+        mStatsEventApi->build(mEventR);
+        return mStatsEventApi->write(mEventR);
+    }
+
+    if (!mPlatformAtLeastR) return mEventQ.write(LOG_ID_STATS);
+
+    // We reach here only if we're on R, but libstatspush_compat was unable to
+    // be loaded using dlopen.
+    return -ENOLINK;
+}
+
+bool StatsEventCompat::usesNewSchema() {
+    return mStatsEventApi != nullptr;
+}
diff --git a/libstats/push_compat/include/StatsEventCompat.h b/libstats/push_compat/include/StatsEventCompat.h
new file mode 100644
index 0000000..a8cde68
--- /dev/null
+++ b/libstats/push_compat/include/StatsEventCompat.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <gtest/gtest_prod.h>
+#include <map>
+#include <mutex>
+#include <vector>
+#include "stats_event.h"
+#include "stats_event_list.h"
+
+using std::map;
+using std::vector;
+
+class StatsEventCompat {
+  public:
+    StatsEventCompat();
+    ~StatsEventCompat();
+
+    void setAtomId(int32_t atomId);
+    void writeInt32(int32_t value);
+    void writeInt64(int64_t value);
+    void writeFloat(float value);
+    void writeBool(bool value);
+    void writeByteArray(const char* buffer, size_t length);
+    void writeString(const char* value);
+
+    // Pre-condition: numUids == tags.size()
+    void writeAttributionChain(const int32_t* uids, size_t numUids,
+                               const vector<const char*>& tags);
+
+    void writeKeyValuePairs(const map<int, int32_t>& int32Map, const map<int, int64_t>& int64Map,
+                            const map<int, const char*>& stringMap,
+                            const map<int, float>& floatMap);
+
+    void addBoolAnnotation(uint8_t annotationId, bool value);
+    void addInt32Annotation(uint8_t annotationId, int32_t value);
+
+    int writeToSocket();
+
+  private:
+    // static member variables
+    const static bool mPlatformAtLeastR;
+    static bool mAttemptedLoad;
+    static std::mutex mLoadLock;
+    static struct stats_event_api_table* mStatsEventApi;
+
+    // non-static member variables
+    struct stats_event* mEventR = nullptr;
+    stats_event_list mEventQ;
+
+    template <class T>
+    void writeKeyValuePairMap(const map<int, T>& keyValuePairMap);
+
+    bool usesNewSchema();
+    FRIEND_TEST(StatsEventCompatTest, TestDynamicLoading);
+};
diff --git a/libstats/include/stats_event_list.h b/libstats/push_compat/include/stats_event_list.h
similarity index 100%
rename from libstats/include/stats_event_list.h
rename to libstats/push_compat/include/stats_event_list.h
diff --git a/libstats/stats_event_list.c b/libstats/push_compat/stats_event_list.c
similarity index 100%
rename from libstats/stats_event_list.c
rename to libstats/push_compat/stats_event_list.c
diff --git a/libstats/statsd_writer.c b/libstats/push_compat/statsd_writer.c
similarity index 98%
rename from libstats/statsd_writer.c
rename to libstats/push_compat/statsd_writer.c
index 073b67f..04d3b46 100644
--- a/libstats/statsd_writer.c
+++ b/libstats/push_compat/statsd_writer.c
@@ -101,7 +101,7 @@
             strcpy(un.sun_path, "/dev/socket/statsdw");
 
             if (TEMP_FAILURE_RETRY(
-                    connect(sock, (struct sockaddr*)&un, sizeof(struct sockaddr_un))) < 0) {
+                        connect(sock, (struct sockaddr*)&un, sizeof(struct sockaddr_un))) < 0) {
                 ret = -errno;
                 switch (ret) {
                     case -ENOTCONN:
diff --git a/libstats/statsd_writer.h b/libstats/push_compat/statsd_writer.h
similarity index 100%
copy from libstats/statsd_writer.h
copy to libstats/push_compat/statsd_writer.h
diff --git a/libstats/push_compat/tests/StatsEventCompat_test.cpp b/libstats/push_compat/tests/StatsEventCompat_test.cpp
new file mode 100644
index 0000000..2be24ec
--- /dev/null
+++ b/libstats/push_compat/tests/StatsEventCompat_test.cpp
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/StatsEventCompat.h"
+#include <android-base/properties.h>
+#include <android/api-level.h>
+#include <gtest/gtest.h>
+
+using android::base::GetProperty;
+
+/* Checking ro.build.version.release is fragile, as the release field is
+ * an opaque string without structural guarantees. However, testing confirms
+ * that on Q devices, the property is "10," and on R, it is "R." Until
+ * android_get_device_api_level() is updated, this is the only solution.
+ *
+ *
+ * TODO(b/146019024): migrate to android_get_device_api_level()
+ */
+const static bool mPlatformAtLeastR = GetProperty("ro.build.version.release", "") == "R" ||
+                                      android_get_device_api_level() > __ANDROID_API_Q__;
+
+TEST(StatsEventCompatTest, TestDynamicLoading) {
+    StatsEventCompat event;
+    EXPECT_EQ(mPlatformAtLeastR, event.usesNewSchema());
+}
diff --git a/libstats/socket/Android.bp b/libstats/socket/Android.bp
new file mode 100644
index 0000000..9fd9fbc
--- /dev/null
+++ b/libstats/socket/Android.bp
@@ -0,0 +1,96 @@
+//
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// =========================================================================
+// Native library to write stats log to statsd socket on Android R and later
+// =========================================================================
+cc_library {
+    name: "libstatssocket",
+    srcs: [
+        "stats_buffer_writer.c",
+        "stats_event.c",
+        // TODO(b/145573568): Remove stats_event_list once stats_event
+        // migration is complete.
+        "stats_event_list.c",
+        "statsd_writer.c",
+    ],
+    host_supported: true,
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-DLIBLOG_LOG_TAG=1006",
+        "-DWRITE_TO_STATSD=1",
+        "-DWRITE_TO_LOGD=0",
+    ],
+    export_include_dirs: ["include"],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+    ],
+
+    // enumerate stable entry points for APEX use
+    stubs: {
+        symbol_file: "libstatssocket.map.txt",
+        versions: [
+            "1",
+        ],
+    }
+}
+
+cc_library_headers {
+    name: "libstatssocket_headers",
+    export_include_dirs: ["include"],
+    host_supported: true,
+}
+
+cc_benchmark {
+    name: "libstatssocket_benchmark",
+    srcs: [
+        "benchmark/main.cpp",
+        "benchmark/stats_event_benchmark.cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    static_libs: [
+        "libstatssocket",
+    ],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+        "libgtest_prod",
+    ],
+}
+
+cc_test {
+    name: "libstatssocket_test",
+    srcs: ["tests/stats_event_test.cpp"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    static_libs: [
+        "libgmock",
+        "libstatssocket",
+    ],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+        "libutils",
+    ],
+    test_suites: ["device_tests"],
+}
diff --git a/libmemunreachable/tests/HostMallocStub.cpp b/libstats/socket/benchmark/main.cpp
similarity index 81%
rename from libmemunreachable/tests/HostMallocStub.cpp
rename to libstats/socket/benchmark/main.cpp
index 0ef0487..5ebdf6e 100644
--- a/libmemunreachable/tests/HostMallocStub.cpp
+++ b/libstats/socket/benchmark/main.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-#include "bionic.h"
+#include <benchmark/benchmark.h>
 
-void malloc_disable() {}
-
-void malloc_enable() {}
+BENCHMARK_MAIN();
diff --git a/libstats/socket/benchmark/stats_event_benchmark.cpp b/libstats/socket/benchmark/stats_event_benchmark.cpp
new file mode 100644
index 0000000..9488168
--- /dev/null
+++ b/libstats/socket/benchmark/stats_event_benchmark.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "benchmark/benchmark.h"
+#include "stats_event.h"
+
+static struct stats_event* constructStatsEvent() {
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, 100);
+
+    // randomly sample atom size
+    int numElements = rand() % 800;
+    for (int i = 0; i < numElements; i++) {
+        stats_event_write_int32(event, i);
+    }
+
+    return event;
+}
+
+static void BM_stats_event_truncate_buffer(benchmark::State& state) {
+    while (state.KeepRunning()) {
+        struct stats_event* event = constructStatsEvent();
+        stats_event_build(event);
+        stats_event_write(event);
+        stats_event_release(event);
+    }
+}
+
+BENCHMARK(BM_stats_event_truncate_buffer);
+
+static void BM_stats_event_full_buffer(benchmark::State& state) {
+    while (state.KeepRunning()) {
+        struct stats_event* event = constructStatsEvent();
+        stats_event_truncate_buffer(event, false);
+        stats_event_build(event);
+        stats_event_write(event);
+        stats_event_release(event);
+    }
+}
+
+BENCHMARK(BM_stats_event_full_buffer);
diff --git a/adb/daemon/set_verity_enable_state_service.h b/libstats/socket/include/stats_buffer_writer.h
similarity index 66%
copy from adb/daemon/set_verity_enable_state_service.h
copy to libstats/socket/include/stats_buffer_writer.h
index c0ed98e..de4a5e2 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/libstats/socket/include/stats_buffer_writer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,14 @@
 
 #pragma once
 
-#include "adb_unique_fd.h"
+#include <stddef.h>
+#include <stdint.h>
 
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+#ifdef __cplusplus
+extern "C" {
+#endif  // __CPLUSPLUS
+void stats_log_close();
+int write_buffer_to_statsd(void* buffer, size_t size, uint32_t atomId);
+#ifdef __cplusplus
+}
+#endif  // __CPLUSPLUS
diff --git a/libstats/socket/include/stats_event.h b/libstats/socket/include/stats_event.h
new file mode 100644
index 0000000..080e957
--- /dev/null
+++ b/libstats/socket/include/stats_event.h
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_STATS_LOG_STATS_EVENT_H
+#define ANDROID_STATS_LOG_STATS_EVENT_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ * Functionality to build and store the buffer sent over the statsd socket.
+ * This code defines and encapsulates the socket protocol.
+ *
+ * Usage:
+ *      struct stats_event* event = stats_event_obtain();
+ *
+ *      stats_event_set_atom_id(event, atomId);
+ *      stats_event_write_int32(event, 24);
+ *      stats_event_add_bool_annotation(event, 1, true); // annotations apply to the previous field
+ *      stats_event_add_int32_annotation(event, 2, 128);
+ *      stats_event_write_float(event, 2.0);
+ *
+ *      stats_event_build(event);
+ *      stats_event_write(event);
+ *      stats_event_release(event);
+ *
+ * Notes:
+ *    (a) write_<type>() and add_<type>_annotation() should be called in the order that fields
+ *        and annotations are defined in the atom.
+ *    (b) set_atom_id() can be called anytime before stats_event_write().
+ *    (c) add_<type>_annotation() calls apply to the previous field.
+ *    (d) If errors occur, stats_event_write() will write a bitmask of the errors to the socket.
+ *    (e) All strings should be encoded using UTF8.
+ */
+
+/* ERRORS */
+#define ERROR_NO_TIMESTAMP 0x1
+#define ERROR_NO_ATOM_ID 0x2
+#define ERROR_OVERFLOW 0x4
+#define ERROR_ATTRIBUTION_CHAIN_TOO_LONG 0x8
+#define ERROR_TOO_MANY_KEY_VALUE_PAIRS 0x10
+#define ERROR_ANNOTATION_DOES_NOT_FOLLOW_FIELD 0x20
+#define ERROR_INVALID_ANNOTATION_ID 0x40
+#define ERROR_ANNOTATION_ID_TOO_LARGE 0x80
+#define ERROR_TOO_MANY_ANNOTATIONS 0x100
+#define ERROR_TOO_MANY_FIELDS 0x200
+#define ERROR_INVALID_VALUE_TYPE 0x400
+#define ERROR_STRING_NOT_NULL_TERMINATED 0x800
+
+/* TYPE IDS */
+#define INT32_TYPE 0x00
+#define INT64_TYPE 0x01
+#define STRING_TYPE 0x02
+#define LIST_TYPE 0x03
+#define FLOAT_TYPE 0x04
+#define BOOL_TYPE 0x05
+#define BYTE_ARRAY_TYPE 0x06
+#define OBJECT_TYPE 0x07
+#define KEY_VALUE_PAIRS_TYPE 0x08
+#define ATTRIBUTION_CHAIN_TYPE 0x09
+#define ERROR_TYPE 0x0F
+
+#ifdef __cplusplus
+extern "C" {
+#endif  // __CPLUSPLUS
+
+struct stats_event;
+
+/* SYSTEM API */
+struct stats_event* stats_event_obtain();
+// The build function can be called multiple times without error. If the event
+// has been built before, this function is a no-op.
+void stats_event_build(struct stats_event* event);
+int stats_event_write(struct stats_event* event);
+void stats_event_release(struct stats_event* event);
+
+void stats_event_set_atom_id(struct stats_event* event, uint32_t atomId);
+
+void stats_event_write_int32(struct stats_event* event, int32_t value);
+void stats_event_write_int64(struct stats_event* event, int64_t value);
+void stats_event_write_float(struct stats_event* event, float value);
+void stats_event_write_bool(struct stats_event* event, bool value);
+
+void stats_event_write_byte_array(struct stats_event* event, const uint8_t* buf, size_t numBytes);
+
+// Buf must be null-terminated.
+void stats_event_write_string8(struct stats_event* event, const char* value);
+
+// Tags must be null-terminated.
+void stats_event_write_attribution_chain(struct stats_event* event, const uint32_t* uids,
+                                         const char* const* tags, uint8_t numNodes);
+
+/* key_value_pair struct can be constructed as follows:
+ *    struct key_value_pair pair = {.key = key, .valueType = STRING_TYPE,
+ *                                  .stringValue = buf};
+ */
+struct key_value_pair {
+    int32_t key;
+    uint8_t valueType;  // expected to be INT32_TYPE, INT64_TYPE, FLOAT_TYPE, or STRING_TYPE
+    union {
+        int32_t int32Value;
+        int64_t int64Value;
+        float floatValue;
+        const char* stringValue;  // must be null terminated
+    };
+};
+
+void stats_event_write_key_value_pairs(struct stats_event* event, struct key_value_pair* pairs,
+                                       uint8_t numPairs);
+
+void stats_event_add_bool_annotation(struct stats_event* event, uint8_t annotationId, bool value);
+void stats_event_add_int32_annotation(struct stats_event* event, uint8_t annotationId,
+                                      int32_t value);
+
+uint32_t stats_event_get_atom_id(struct stats_event* event);
+// Size is an output parameter.
+uint8_t* stats_event_get_buffer(struct stats_event* event, size_t* size);
+uint32_t stats_event_get_errors(struct stats_event* event);
+
+// This table is used by StatsEventCompat to access the stats_event API.
+struct stats_event_api_table {
+    struct stats_event* (*obtain)(void);
+    void (*build)(struct stats_event*);
+    int (*write)(struct stats_event*);
+    void (*release)(struct stats_event*);
+    void (*set_atom_id)(struct stats_event*, uint32_t);
+    void (*write_int32)(struct stats_event*, int32_t);
+    void (*write_int64)(struct stats_event*, int64_t);
+    void (*write_float)(struct stats_event*, float);
+    void (*write_bool)(struct stats_event*, bool);
+    void (*write_byte_array)(struct stats_event*, const uint8_t*, size_t);
+    void (*write_string8)(struct stats_event*, const char*);
+    void (*write_attribution_chain)(struct stats_event*, const uint32_t*, const char* const*,
+                                    uint8_t);
+    void (*write_key_value_pairs)(struct stats_event*, struct key_value_pair*, uint8_t);
+    void (*add_bool_annotation)(struct stats_event*, uint8_t, bool);
+    void (*add_int32_annotation)(struct stats_event*, uint8_t, int32_t);
+    uint32_t (*get_atom_id)(struct stats_event*);
+    uint8_t* (*get_buffer)(struct stats_event*, size_t*);
+    uint32_t (*get_errors)(struct stats_event*);
+};
+
+// exposed for benchmarking only
+void stats_event_truncate_buffer(struct stats_event* event, bool truncate);
+
+#ifdef __cplusplus
+}
+#endif  // __CPLUSPLUS
+
+#endif  // ANDROID_STATS_LOG_STATS_EVENT_H
diff --git a/libstats/socket/include/stats_event_list.h b/libstats/socket/include/stats_event_list.h
new file mode 100644
index 0000000..7a26536
--- /dev/null
+++ b/libstats/socket/include/stats_event_list.h
@@ -0,0 +1,248 @@
+/*
+ * Copyright (C) 2018, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <log/log_event_list.h>
+#include <sys/uio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void reset_log_context(android_log_context ctx);
+int write_to_logger(android_log_context context, log_id_t id);
+void note_log_drop(int error, int atomId);
+void stats_log_close();
+int android_log_write_char_array(android_log_context ctx, const char* value, size_t len);
+#ifdef __cplusplus
+}
+#endif
+
+#ifdef __cplusplus
+/**
+ * A copy of android_log_event_list class.
+ *
+ * android_log_event_list is going to be deprecated soon, so copy it here to
+ * avoid creating dependency on upstream code. TODO(b/78304629): Rewrite this
+ * code.
+ */
+class stats_event_list {
+  private:
+    android_log_context ctx;
+    int ret;
+
+    stats_event_list(const stats_event_list&) = delete;
+    void operator=(const stats_event_list&) = delete;
+
+  public:
+    explicit stats_event_list(int tag) : ret(0) {
+        ctx = create_android_logger(static_cast<uint32_t>(tag));
+    }
+    ~stats_event_list() { android_log_destroy(&ctx); }
+
+    int close() {
+        int retval = android_log_destroy(&ctx);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return retval;
+    }
+
+    /* To allow above C calls to use this class as parameter */
+    operator android_log_context() const { return ctx; }
+
+    /* return errors or transmit status */
+    int status() const { return ret; }
+
+    int begin() {
+        int retval = android_log_write_list_begin(ctx);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret;
+    }
+    int end() {
+        int retval = android_log_write_list_end(ctx);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret;
+    }
+
+    stats_event_list& operator<<(int32_t value) {
+        int retval = android_log_write_int32(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(uint32_t value) {
+        int retval = android_log_write_int32(ctx, static_cast<int32_t>(value));
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(bool value) {
+        int retval = android_log_write_int32(ctx, value ? 1 : 0);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(int64_t value) {
+        int retval = android_log_write_int64(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(uint64_t value) {
+        int retval = android_log_write_int64(ctx, static_cast<int64_t>(value));
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(const char* value) {
+        int retval = android_log_write_string8(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(const std::string& value) {
+        int retval = android_log_write_string8_len(ctx, value.data(), value.length());
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    stats_event_list& operator<<(float value) {
+        int retval = android_log_write_float32(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return *this;
+    }
+
+    int write(log_id_t id = LOG_ID_EVENTS) {
+        /* facilitate -EBUSY retry */
+        if ((ret == -EBUSY) || (ret > 0)) {
+            ret = 0;
+        }
+        int retval = write_to_logger(ctx, id);
+        /* existing errors trump transmission errors */
+        if (!ret) {
+            ret = retval;
+        }
+        return ret;
+    }
+
+    /*
+     * Append<Type> methods removes any integer promotion
+     * confusion, and adds access to string with length.
+     * Append methods are also added for all types for
+     * convenience.
+     */
+
+    bool AppendInt(int32_t value) {
+        int retval = android_log_write_int32(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    bool AppendLong(int64_t value) {
+        int retval = android_log_write_int64(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    bool AppendString(const char* value) {
+        int retval = android_log_write_string8(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    bool AppendString(const char* value, size_t len) {
+        int retval = android_log_write_string8_len(ctx, value, len);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    bool AppendString(const std::string& value) {
+        int retval = android_log_write_string8_len(ctx, value.data(), value.length());
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret;
+    }
+
+    bool Append(const std::string& value) {
+        int retval = android_log_write_string8_len(ctx, value.data(), value.length());
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret;
+    }
+
+    bool AppendFloat(float value) {
+        int retval = android_log_write_float32(ctx, value);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    template <typename Tvalue>
+    bool Append(Tvalue value) {
+        *this << value;
+        return ret >= 0;
+    }
+
+    bool Append(const char* value, size_t len) {
+        int retval = android_log_write_string8_len(ctx, value, len);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+
+    bool AppendCharArray(const char* value, size_t len) {
+        int retval = android_log_write_char_array(ctx, value, len);
+        if (retval < 0) {
+            ret = retval;
+        }
+        return ret >= 0;
+    }
+};
+
+#endif
diff --git a/libstats/socket/libstatssocket.map.txt b/libstats/socket/libstatssocket.map.txt
new file mode 100644
index 0000000..55bfbda
--- /dev/null
+++ b/libstats/socket/libstatssocket.map.txt
@@ -0,0 +1,23 @@
+LIBSTATSSOCKET {
+    global:
+        stats_event_obtain; # apex # introduced=1
+        stats_event_build; # apex # introduced=1
+        stats_event_write; # apex # introduced=1
+        stats_event_release; # apex # introduced=1
+        stats_event_set_atom_id; # apex # introduced=1
+        stats_event_write_int32; # apex # introduced=1
+        stats_event_write_int64; # apex # introduced=1
+        stats_event_write_float; # apex # introduced=1
+        stats_event_write_bool; # apex # introduced=1
+        stats_event_write_byte_array; # apex # introduced=1
+        stats_event_write_string8; # apex # introduced=1
+        stats_event_write_attribution_chain; # apex # introduced=1
+        stats_event_write_key_value_pairs; # apex # introduced=1
+        stats_event_add_bool_annotation; # apex # introduced=1
+        stats_event_add_int32_annotation; # apex # introduced=1
+        stats_event_get_atom_id; # apex # introduced=1
+        stats_event_get_buffer; # apex # introduced=1
+        stats_event_get_errors; # apex # introduced=1
+    local:
+        *;
+};
diff --git a/libstats/socket/stats_buffer_writer.c b/libstats/socket/stats_buffer_writer.c
new file mode 100644
index 0000000..c5c591d
--- /dev/null
+++ b/libstats/socket/stats_buffer_writer.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/stats_buffer_writer.h"
+#ifdef __ANDROID__
+#include <cutils/properties.h>
+#endif
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+#include "statsd_writer.h"
+
+static const uint32_t kStatsEventTag = 1937006964;
+
+extern struct android_log_transport_write statsdLoggerWrite;
+
+static int __write_to_statsd_init(struct iovec* vec, size_t nr);
+static int (*__write_to_statsd)(struct iovec* vec, size_t nr) = __write_to_statsd_init;
+
+void note_log_drop(int error, int atomId) {
+    statsdLoggerWrite.noteDrop(error, atomId);
+}
+
+void stats_log_close() {
+    statsd_writer_init_lock();
+    __write_to_statsd = __write_to_statsd_init;
+    if (statsdLoggerWrite.close) {
+        (*statsdLoggerWrite.close)();
+    }
+    statsd_writer_init_unlock();
+}
+
+int write_buffer_to_statsd(void* buffer, size_t size, uint32_t atomId) {
+    int ret = 1;
+
+#ifdef __ANDROID__
+    bool statsdEnabled = property_get_bool("ro.statsd.enable", true);
+#else
+    bool statsdEnabled = false;
+#endif
+
+    if (statsdEnabled) {
+        struct iovec vecs[2];
+        vecs[0].iov_base = (void*)&kStatsEventTag;
+        vecs[0].iov_len = sizeof(kStatsEventTag);
+        vecs[1].iov_base = buffer;
+        vecs[1].iov_len = size;
+
+        ret = __write_to_statsd(vecs, 2);
+
+        if (ret < 0) {
+            note_log_drop(ret, atomId);
+        }
+    }
+
+    return ret;
+}
+
+static int __write_to_stats_daemon(struct iovec* vec, size_t nr) {
+    int save_errno;
+    struct timespec ts;
+    size_t len, i;
+
+    for (len = i = 0; i < nr; ++i) {
+        len += vec[i].iov_len;
+    }
+    if (!len) {
+        return -EINVAL;
+    }
+
+    save_errno = errno;
+#if defined(__ANDROID__)
+    clock_gettime(CLOCK_REALTIME, &ts);
+#else
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    ts.tv_sec = tv.tv_sec;
+    ts.tv_nsec = tv.tv_usec * 1000;
+#endif
+
+    int ret = (int)(*statsdLoggerWrite.write)(&ts, vec, nr);
+    errno = save_errno;
+    return ret;
+}
+
+static int __write_to_statsd_initialize_locked() {
+    if (!statsdLoggerWrite.open || ((*statsdLoggerWrite.open)() < 0)) {
+        if (statsdLoggerWrite.close) {
+            (*statsdLoggerWrite.close)();
+            return -ENODEV;
+        }
+    }
+    return 1;
+}
+
+static int __write_to_statsd_init(struct iovec* vec, size_t nr) {
+    int ret, save_errno = errno;
+
+    statsd_writer_init_lock();
+
+    if (__write_to_statsd == __write_to_statsd_init) {
+        ret = __write_to_statsd_initialize_locked();
+        if (ret < 0) {
+            statsd_writer_init_unlock();
+            errno = save_errno;
+            return ret;
+        }
+
+        __write_to_statsd = __write_to_stats_daemon;
+    }
+
+    statsd_writer_init_unlock();
+
+    ret = __write_to_statsd(vec, nr);
+    errno = save_errno;
+    return ret;
+}
diff --git a/libstats/socket/stats_event.c b/libstats/socket/stats_event.c
new file mode 100644
index 0000000..15039c6
--- /dev/null
+++ b/libstats/socket/stats_event.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/stats_event.h"
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "stats_buffer_writer.h"
+
+#define LOGGER_ENTRY_MAX_PAYLOAD 4068
+// Max payload size is 4 bytes less as 4 bytes are reserved for stats_eventTag.
+// See android_util_Stats_Log.cpp
+#define MAX_EVENT_PAYLOAD (LOGGER_ENTRY_MAX_PAYLOAD - 4)
+
+/* POSITIONS */
+#define POS_NUM_ELEMENTS 1
+#define POS_TIMESTAMP (POS_NUM_ELEMENTS + sizeof(uint8_t))
+#define POS_ATOM_ID (POS_TIMESTAMP + sizeof(uint8_t) + sizeof(uint64_t))
+#define POS_FIRST_FIELD (POS_ATOM_ID + sizeof(uint8_t) + sizeof(uint32_t))
+
+/* LIMITS */
+#define MAX_ANNOTATION_COUNT 15
+#define MAX_BYTE_VALUE 127  // parsing side requires that lengths fit in 7 bits
+
+// The stats_event struct holds the serialized encoding of an event
+// within a buf. Also includes other required fields.
+struct stats_event {
+    uint8_t* buf;
+    size_t lastFieldPos;  // location of last field within the buf
+    size_t size;          // number of valid bytes within buffer
+    uint32_t numElements;
+    uint32_t atomId;
+    uint32_t errors;
+    bool truncate;
+    bool built;
+};
+
+static int64_t get_elapsed_realtime_ns() {
+    struct timespec t;
+    t.tv_sec = t.tv_nsec = 0;
+    clock_gettime(CLOCK_BOOTTIME, &t);
+    return (int64_t)t.tv_sec * 1000000000LL + t.tv_nsec;
+}
+
+struct stats_event* stats_event_obtain() {
+    struct stats_event* event = malloc(sizeof(struct stats_event));
+    event->buf = (uint8_t*)calloc(MAX_EVENT_PAYLOAD, 1);
+    event->buf[0] = OBJECT_TYPE;
+    event->atomId = 0;
+    event->errors = 0;
+    event->truncate = true;  // truncate for both pulled and pushed atoms
+    event->built = false;
+
+    // place the timestamp
+    uint64_t timestampNs = get_elapsed_realtime_ns();
+    event->buf[POS_TIMESTAMP] = INT64_TYPE;
+    memcpy(&event->buf[POS_TIMESTAMP + sizeof(uint8_t)], &timestampNs, sizeof(timestampNs));
+
+    event->numElements = 1;
+    event->lastFieldPos = 0;  // 0 since we haven't written a field yet
+    event->size = POS_FIRST_FIELD;
+
+    return event;
+}
+
+void stats_event_release(struct stats_event* event) {
+    free(event->buf);
+    free(event);
+}
+
+void stats_event_set_atom_id(struct stats_event* event, uint32_t atomId) {
+    event->atomId = atomId;
+    event->buf[POS_ATOM_ID] = INT32_TYPE;
+    memcpy(&event->buf[POS_ATOM_ID + sizeof(uint8_t)], &atomId, sizeof(atomId));
+    event->numElements++;
+}
+
+// Side-effect: modifies event->errors if the buffer would overflow
+static bool overflows(struct stats_event* event, size_t size) {
+    if (event->size + size > MAX_EVENT_PAYLOAD) {
+        event->errors |= ERROR_OVERFLOW;
+        return true;
+    }
+    return false;
+}
+
+// Side-effect: all append functions increment event->size if there is
+// sufficient space within the buffer to place the value
+static void append_byte(struct stats_event* event, uint8_t value) {
+    if (!overflows(event, sizeof(value))) {
+        event->buf[event->size] = value;
+        event->size += sizeof(value);
+    }
+}
+
+static void append_bool(struct stats_event* event, bool value) {
+    append_byte(event, (uint8_t)value);
+}
+
+static void append_int32(struct stats_event* event, int32_t value) {
+    if (!overflows(event, sizeof(value))) {
+        memcpy(&event->buf[event->size], &value, sizeof(value));
+        event->size += sizeof(value);
+    }
+}
+
+static void append_int64(struct stats_event* event, int64_t value) {
+    if (!overflows(event, sizeof(value))) {
+        memcpy(&event->buf[event->size], &value, sizeof(value));
+        event->size += sizeof(value);
+    }
+}
+
+static void append_float(struct stats_event* event, float value) {
+    if (!overflows(event, sizeof(value))) {
+        memcpy(&event->buf[event->size], &value, sizeof(value));
+        event->size += sizeof(float);
+    }
+}
+
+static void append_byte_array(struct stats_event* event, const uint8_t* buf, size_t size) {
+    if (!overflows(event, size)) {
+        memcpy(&event->buf[event->size], buf, size);
+        event->size += size;
+    }
+}
+
+// Side-effect: modifies event->errors if buf is not properly null-terminated
+static void append_string(struct stats_event* event, const char* buf) {
+    size_t size = strnlen(buf, MAX_EVENT_PAYLOAD);
+    if (size == MAX_EVENT_PAYLOAD) {
+        event->errors |= ERROR_STRING_NOT_NULL_TERMINATED;
+        return;
+    }
+
+    append_int32(event, size);
+    append_byte_array(event, (uint8_t*)buf, size);
+}
+
+static void start_field(struct stats_event* event, uint8_t typeId) {
+    event->lastFieldPos = event->size;
+    append_byte(event, typeId);
+    event->numElements++;
+}
+
+void stats_event_write_int32(struct stats_event* event, int32_t value) {
+    if (event->errors) return;
+
+    start_field(event, INT32_TYPE);
+    append_int32(event, value);
+}
+
+void stats_event_write_int64(struct stats_event* event, int64_t value) {
+    if (event->errors) return;
+
+    start_field(event, INT64_TYPE);
+    append_int64(event, value);
+}
+
+void stats_event_write_float(struct stats_event* event, float value) {
+    if (event->errors) return;
+
+    start_field(event, FLOAT_TYPE);
+    append_float(event, value);
+}
+
+void stats_event_write_bool(struct stats_event* event, bool value) {
+    if (event->errors) return;
+
+    start_field(event, BOOL_TYPE);
+    append_bool(event, value);
+}
+
+void stats_event_write_byte_array(struct stats_event* event, const uint8_t* buf, size_t numBytes) {
+    if (event->errors) return;
+
+    start_field(event, BYTE_ARRAY_TYPE);
+    append_int32(event, numBytes);
+    append_byte_array(event, buf, numBytes);
+}
+
+// Value is assumed to be encoded using UTF8
+void stats_event_write_string8(struct stats_event* event, const char* value) {
+    if (event->errors) return;
+
+    start_field(event, STRING_TYPE);
+    append_string(event, value);
+}
+
+// Tags are assumed to be encoded using UTF8
+void stats_event_write_attribution_chain(struct stats_event* event, const uint32_t* uids,
+                                         const char* const* tags, uint8_t numNodes) {
+    if (numNodes > MAX_BYTE_VALUE) event->errors |= ERROR_ATTRIBUTION_CHAIN_TOO_LONG;
+    if (event->errors) return;
+
+    start_field(event, ATTRIBUTION_CHAIN_TYPE);
+    append_byte(event, numNodes);
+
+    for (uint8_t i = 0; i < numNodes; i++) {
+        append_int32(event, uids[i]);
+        append_string(event, tags[i]);
+    }
+}
+
+void stats_event_write_key_value_pairs(struct stats_event* event, struct key_value_pair* pairs,
+                                       uint8_t numPairs) {
+    if (numPairs > MAX_BYTE_VALUE) event->errors |= ERROR_TOO_MANY_KEY_VALUE_PAIRS;
+    if (event->errors) return;
+
+    start_field(event, KEY_VALUE_PAIRS_TYPE);
+    append_byte(event, numPairs);
+
+    for (uint8_t i = 0; i < numPairs; i++) {
+        append_int32(event, pairs[i].key);
+        append_byte(event, pairs[i].valueType);
+        switch (pairs[i].valueType) {
+            case INT32_TYPE:
+                append_int32(event, pairs[i].int32Value);
+                break;
+            case INT64_TYPE:
+                append_int64(event, pairs[i].int64Value);
+                break;
+            case FLOAT_TYPE:
+                append_float(event, pairs[i].floatValue);
+                break;
+            case STRING_TYPE:
+                append_string(event, pairs[i].stringValue);
+                break;
+            default:
+                event->errors |= ERROR_INVALID_VALUE_TYPE;
+                return;
+        }
+    }
+}
+
+// Side-effect: modifies event->errors if field has too many annotations
+static void increment_annotation_count(struct stats_event* event) {
+    uint8_t fieldType = event->buf[event->lastFieldPos] & 0x0F;
+    uint32_t oldAnnotationCount = (event->buf[event->lastFieldPos] & 0xF0) >> 4;
+    uint32_t newAnnotationCount = oldAnnotationCount + 1;
+
+    if (newAnnotationCount > MAX_ANNOTATION_COUNT) {
+        event->errors |= ERROR_TOO_MANY_ANNOTATIONS;
+        return;
+    }
+
+    event->buf[event->lastFieldPos] = (((uint8_t)newAnnotationCount << 4) & 0xF0) | fieldType;
+}
+
+void stats_event_add_bool_annotation(struct stats_event* event, uint8_t annotationId, bool value) {
+    if (event->lastFieldPos == 0) event->errors |= ERROR_ANNOTATION_DOES_NOT_FOLLOW_FIELD;
+    if (annotationId > MAX_BYTE_VALUE) event->errors |= ERROR_ANNOTATION_ID_TOO_LARGE;
+    if (event->errors) return;
+
+    append_byte(event, annotationId);
+    append_byte(event, BOOL_TYPE);
+    append_bool(event, value);
+    increment_annotation_count(event);
+}
+
+void stats_event_add_int32_annotation(struct stats_event* event, uint8_t annotationId,
+                                      int32_t value) {
+    if (event->lastFieldPos == 0) event->errors |= ERROR_ANNOTATION_DOES_NOT_FOLLOW_FIELD;
+    if (annotationId > MAX_BYTE_VALUE) event->errors |= ERROR_ANNOTATION_ID_TOO_LARGE;
+    if (event->errors) return;
+
+    append_byte(event, annotationId);
+    append_byte(event, INT32_TYPE);
+    append_int32(event, value);
+    increment_annotation_count(event);
+}
+
+uint32_t stats_event_get_atom_id(struct stats_event* event) {
+    return event->atomId;
+}
+
+uint8_t* stats_event_get_buffer(struct stats_event* event, size_t* size) {
+    if (size) *size = event->size;
+    return event->buf;
+}
+
+uint32_t stats_event_get_errors(struct stats_event* event) {
+    return event->errors;
+}
+
+void stats_event_truncate_buffer(struct stats_event* event, bool truncate) {
+    event->truncate = truncate;
+}
+
+void stats_event_build(struct stats_event* event) {
+    if (event->built) return;
+
+    if (event->atomId == 0) event->errors |= ERROR_NO_ATOM_ID;
+
+    if (event->numElements > MAX_BYTE_VALUE) {
+        event->errors |= ERROR_TOO_MANY_FIELDS;
+    } else {
+        event->buf[POS_NUM_ELEMENTS] = event->numElements;
+    }
+
+    // If there are errors, rewrite buffer.
+    if (event->errors) {
+        event->buf[POS_NUM_ELEMENTS] = 3;
+        event->buf[POS_FIRST_FIELD] = ERROR_TYPE;
+        memcpy(&event->buf[POS_FIRST_FIELD + sizeof(uint8_t)], &event->errors,
+               sizeof(event->errors));
+        event->size = POS_FIRST_FIELD + sizeof(uint8_t) + sizeof(uint32_t);
+    }
+
+    // Truncate the buffer to the appropriate length in order to limit our
+    // memory usage.
+    if (event->truncate) event->buf = (uint8_t*)realloc(event->buf, event->size);
+
+    event->built = true;
+}
+
+int stats_event_write(struct stats_event* event) {
+    stats_event_build(event);
+    return write_buffer_to_statsd(&event->buf, event->size, event->atomId);
+}
+
+struct stats_event_api_table table = {
+        stats_event_obtain,
+        stats_event_build,
+        stats_event_write,
+        stats_event_release,
+        stats_event_set_atom_id,
+        stats_event_write_int32,
+        stats_event_write_int64,
+        stats_event_write_float,
+        stats_event_write_bool,
+        stats_event_write_byte_array,
+        stats_event_write_string8,
+        stats_event_write_attribution_chain,
+        stats_event_write_key_value_pairs,
+        stats_event_add_bool_annotation,
+        stats_event_add_int32_annotation,
+        stats_event_get_atom_id,
+        stats_event_get_buffer,
+        stats_event_get_errors,
+};
diff --git a/libstats/socket/stats_event_list.c b/libstats/socket/stats_event_list.c
new file mode 100644
index 0000000..661a223
--- /dev/null
+++ b/libstats/socket/stats_event_list.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2018, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "include/stats_event_list.h"
+
+#include <string.h>
+#include <sys/time.h>
+#include "stats_buffer_writer.h"
+
+#define MAX_EVENT_PAYLOAD (LOGGER_ENTRY_MAX_PAYLOAD - sizeof(int32_t))
+
+typedef struct {
+    uint32_t tag;
+    unsigned pos;                                    /* Read/write position into buffer */
+    unsigned count[ANDROID_MAX_LIST_NEST_DEPTH + 1]; /* Number of elements   */
+    unsigned list[ANDROID_MAX_LIST_NEST_DEPTH + 1];  /* pos for list counter */
+    unsigned list_nest_depth;
+    unsigned len; /* Length or raw buffer. */
+    bool overflow;
+    bool list_stop; /* next call decrement list_nest_depth and issue a stop */
+    enum {
+        kAndroidLoggerRead = 1,
+        kAndroidLoggerWrite = 2,
+    } read_write_flag;
+    uint8_t storage[LOGGER_ENTRY_MAX_PAYLOAD];
+} android_log_context_internal;
+
+// Similar to create_android_logger(), but instead of allocation a new buffer,
+// this function resets the buffer for resuse.
+void reset_log_context(android_log_context ctx) {
+    if (!ctx) {
+        return;
+    }
+    android_log_context_internal* context = (android_log_context_internal*)(ctx);
+    uint32_t tag = context->tag;
+    memset(context, 0, sizeof(android_log_context_internal));
+
+    context->tag = tag;
+    context->read_write_flag = kAndroidLoggerWrite;
+    size_t needed = sizeof(uint8_t) + sizeof(uint8_t);
+    if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
+        context->overflow = true;
+    }
+    /* Everything is a list */
+    context->storage[context->pos + 0] = EVENT_TYPE_LIST;
+    context->list[0] = context->pos + 1;
+    context->pos += needed;
+}
+
+int stats_write_list(android_log_context ctx) {
+    android_log_context_internal* context;
+    const char* msg;
+    ssize_t len;
+
+    context = (android_log_context_internal*)(ctx);
+    if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
+        return -EBADF;
+    }
+
+    if (context->list_nest_depth) {
+        return -EIO;
+    }
+
+    /* NB: if there was overflow, then log is truncated. Nothing reported */
+    context->storage[1] = context->count[0];
+    len = context->len = context->pos;
+    msg = (const char*)context->storage;
+    /* it's not a list */
+    if (context->count[0] <= 1) {
+        len -= sizeof(uint8_t) + sizeof(uint8_t);
+        if (len < 0) {
+            len = 0;
+        }
+        msg += sizeof(uint8_t) + sizeof(uint8_t);
+    }
+
+    return write_buffer_to_statsd((void*)msg, len, 0);
+}
+
+int write_to_logger(android_log_context ctx, log_id_t id) {
+    int retValue = 0;
+
+    if (WRITE_TO_LOGD) {
+        retValue = android_log_write_list(ctx, id);
+    }
+
+    if (WRITE_TO_STATSD) {
+        // log_event_list's cast operator is overloaded.
+        int ret = stats_write_list(ctx);
+        // In debugging phase, we may write to both logd and statsd. Prefer to
+        // return statsd socket write error code here.
+        if (ret < 0) {
+            retValue = ret;
+        }
+    }
+
+    return retValue;
+}
+
+static inline void copy4LE(uint8_t* buf, uint32_t val) {
+    buf[0] = val & 0xFF;
+    buf[1] = (val >> 8) & 0xFF;
+    buf[2] = (val >> 16) & 0xFF;
+    buf[3] = (val >> 24) & 0xFF;
+}
+
+// Note: this function differs from android_log_write_string8_len in that the length passed in
+// should be treated as actual length and not max length.
+int android_log_write_char_array(android_log_context ctx, const char* value, size_t actual_len) {
+    size_t needed;
+    ssize_t len = actual_len;
+    android_log_context_internal* context;
+
+    context = (android_log_context_internal*)ctx;
+    if (!context || (kAndroidLoggerWrite != context->read_write_flag)) {
+        return -EBADF;
+    }
+    if (context->overflow) {
+        return -EIO;
+    }
+    if (!value) {
+        value = "";
+        len = 0;
+    }
+    needed = sizeof(uint8_t) + sizeof(int32_t) + len;
+    if ((context->pos + needed) > MAX_EVENT_PAYLOAD) {
+        /* Truncate string for delivery */
+        len = MAX_EVENT_PAYLOAD - context->pos - 1 - sizeof(int32_t);
+        if (len <= 0) {
+            context->overflow = true;
+            return -EIO;
+        }
+    }
+    context->count[context->list_nest_depth]++;
+    context->storage[context->pos + 0] = EVENT_TYPE_STRING;
+    copy4LE(&context->storage[context->pos + 1], len);
+    if (len) {
+        memcpy(&context->storage[context->pos + 5], value, len);
+    }
+    context->pos += needed;
+    return len;
+}
diff --git a/libstats/statsd_writer.c b/libstats/socket/statsd_writer.c
similarity index 98%
copy from libstats/statsd_writer.c
copy to libstats/socket/statsd_writer.c
index 073b67f..04d3b46 100644
--- a/libstats/statsd_writer.c
+++ b/libstats/socket/statsd_writer.c
@@ -101,7 +101,7 @@
             strcpy(un.sun_path, "/dev/socket/statsdw");
 
             if (TEMP_FAILURE_RETRY(
-                    connect(sock, (struct sockaddr*)&un, sizeof(struct sockaddr_un))) < 0) {
+                        connect(sock, (struct sockaddr*)&un, sizeof(struct sockaddr_un))) < 0) {
                 ret = -errno;
                 switch (ret) {
                     case -ENOTCONN:
diff --git a/libstats/statsd_writer.h b/libstats/socket/statsd_writer.h
similarity index 100%
rename from libstats/statsd_writer.h
rename to libstats/socket/statsd_writer.h
diff --git a/libstats/socket/tests/stats_event_test.cpp b/libstats/socket/tests/stats_event_test.cpp
new file mode 100644
index 0000000..cf0592c
--- /dev/null
+++ b/libstats/socket/tests/stats_event_test.cpp
@@ -0,0 +1,344 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "stats_event.h"
+#include <gtest/gtest.h>
+#include <utils/SystemClock.h>
+
+using std::string;
+using std::vector;
+
+// Side-effect: this function moves the start of the buffer past the read value
+template <class T>
+T readNext(uint8_t** buffer) {
+    T value = *(T*)(*buffer);
+    *buffer += sizeof(T);
+    return value;
+}
+
+void checkTypeHeader(uint8_t** buffer, uint8_t typeId, uint8_t numAnnotations = 0) {
+    uint8_t typeHeader = (numAnnotations << 4) | typeId;
+    EXPECT_EQ(readNext<uint8_t>(buffer), typeHeader);
+}
+
+template <class T>
+void checkScalar(uint8_t** buffer, T expectedValue) {
+    EXPECT_EQ(readNext<T>(buffer), expectedValue);
+}
+
+void checkString(uint8_t** buffer, const string& expectedString) {
+    uint32_t size = readNext<uint32_t>(buffer);
+    string parsedString((char*)(*buffer), size);
+    EXPECT_EQ(parsedString, expectedString);
+    *buffer += size;  // move buffer past string we just read
+}
+
+void checkByteArray(uint8_t** buffer, const vector<uint8_t>& expectedByteArray) {
+    uint32_t size = readNext<uint32_t>(buffer);
+    vector<uint8_t> parsedByteArray(*buffer, *buffer + size);
+    EXPECT_EQ(parsedByteArray, expectedByteArray);
+    *buffer += size;  // move buffer past byte array we just read
+}
+
+template <class T>
+void checkAnnotation(uint8_t** buffer, uint8_t annotationId, uint8_t typeId, T annotationValue) {
+    EXPECT_EQ(readNext<uint8_t>(buffer), annotationId);
+    EXPECT_EQ(readNext<uint8_t>(buffer), typeId);
+    checkScalar<T>(buffer, annotationValue);
+}
+
+void checkMetadata(uint8_t** buffer, uint8_t numElements, int64_t startTime, int64_t endTime,
+                   uint32_t atomId) {
+    // All events start with OBJECT_TYPE id.
+    checkTypeHeader(buffer, OBJECT_TYPE);
+
+    // We increment by 2 because the number of elements listed in the
+    // serialization accounts for the timestamp and atom id as well.
+    checkScalar(buffer, static_cast<uint8_t>(numElements + 2));
+
+    // Check timestamp
+    checkTypeHeader(buffer, INT64_TYPE);
+    int64_t timestamp = readNext<int64_t>(buffer);
+    EXPECT_GE(timestamp, startTime);
+    EXPECT_LE(timestamp, endTime);
+
+    // Check atom id
+    checkTypeHeader(buffer, INT32_TYPE);
+    checkScalar(buffer, atomId);
+}
+
+TEST(StatsEventTest, TestScalars) {
+    uint32_t atomId = 100;
+    int32_t int32Value = -5;
+    int64_t int64Value = -2 * android::elapsedRealtimeNano();
+    float floatValue = 2.0;
+    bool boolValue = false;
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, atomId);
+    stats_event_write_int32(event, int32Value);
+    stats_event_write_int64(event, int64Value);
+    stats_event_write_float(event, floatValue);
+    stats_event_write_bool(event, boolValue);
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/4, startTime, endTime, atomId);
+
+    // check int32 element
+    checkTypeHeader(&buffer, INT32_TYPE);
+    checkScalar(&buffer, int32Value);
+
+    // check int64 element
+    checkTypeHeader(&buffer, INT64_TYPE);
+    checkScalar(&buffer, int64Value);
+
+    // check float element
+    checkTypeHeader(&buffer, FLOAT_TYPE);
+    checkScalar(&buffer, floatValue);
+
+    // check bool element
+    checkTypeHeader(&buffer, BOOL_TYPE);
+    checkScalar(&buffer, boolValue);
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestStrings) {
+    uint32_t atomId = 100;
+    string str = "test_string";
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, atomId);
+    stats_event_write_string8(event, str.c_str());
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/1, startTime, endTime, atomId);
+
+    checkTypeHeader(&buffer, STRING_TYPE);
+    checkString(&buffer, str);
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestByteArrays) {
+    uint32_t atomId = 100;
+    vector<uint8_t> message = {'b', 'y', 't', '\0', 'e', 's'};
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, atomId);
+    stats_event_write_byte_array(event, message.data(), message.size());
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/1, startTime, endTime, atomId);
+
+    checkTypeHeader(&buffer, BYTE_ARRAY_TYPE);
+    checkByteArray(&buffer, message);
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestAttributionChains) {
+    uint32_t atomId = 100;
+
+    uint8_t numNodes = 50;
+    uint32_t uids[numNodes];
+    vector<string> tags(numNodes);  // storage that cTag elements point to
+    const char* cTags[numNodes];
+    for (int i = 0; i < (int)numNodes; i++) {
+        uids[i] = i;
+        tags.push_back("test" + std::to_string(i));
+        cTags[i] = tags[i].c_str();
+    }
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, atomId);
+    stats_event_write_attribution_chain(event, uids, cTags, numNodes);
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/1, startTime, endTime, atomId);
+
+    checkTypeHeader(&buffer, ATTRIBUTION_CHAIN_TYPE);
+    checkScalar(&buffer, numNodes);
+    for (int i = 0; i < numNodes; i++) {
+        checkScalar(&buffer, uids[i]);
+        checkString(&buffer, tags[i]);
+    }
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestKeyValuePairs) {
+    uint32_t atomId = 100;
+
+    uint8_t numPairs = 4;
+    struct key_value_pair pairs[numPairs];
+    pairs[0] = {.key = 0, .valueType = INT32_TYPE, .int32Value = -1};
+    pairs[1] = {.key = 1, .valueType = INT64_TYPE, .int64Value = 0x123456789};
+    pairs[2] = {.key = 2, .valueType = FLOAT_TYPE, .floatValue = 5.5};
+    string str = "test_key_value_pair_string";
+    pairs[3] = {.key = 3, .valueType = STRING_TYPE, .stringValue = str.c_str()};
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, atomId);
+    stats_event_write_key_value_pairs(event, pairs, numPairs);
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/1, startTime, endTime, atomId);
+
+    checkTypeHeader(&buffer, KEY_VALUE_PAIRS_TYPE);
+    checkScalar(&buffer, numPairs);
+
+    // first pair
+    checkScalar(&buffer, pairs[0].key);
+    checkTypeHeader(&buffer, pairs[0].valueType);
+    checkScalar(&buffer, pairs[0].int32Value);
+
+    // second pair
+    checkScalar(&buffer, pairs[1].key);
+    checkTypeHeader(&buffer, pairs[1].valueType);
+    checkScalar(&buffer, pairs[1].int64Value);
+
+    // third pair
+    checkScalar(&buffer, pairs[2].key);
+    checkTypeHeader(&buffer, pairs[2].valueType);
+    checkScalar(&buffer, pairs[2].floatValue);
+
+    // fourth pair
+    checkScalar(&buffer, pairs[3].key);
+    checkTypeHeader(&buffer, pairs[3].valueType);
+    checkString(&buffer, str);
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestAnnotations) {
+    uint32_t atomId = 100;
+
+    // first element information
+    bool boolValue = false;
+    uint8_t boolAnnotation1Id = 1;
+    uint8_t boolAnnotation2Id = 2;
+    bool boolAnnotation1Value = true;
+    int32_t boolAnnotation2Value = 3;
+
+    // second element information
+    float floatValue = -5.0;
+    uint8_t floatAnnotation1Id = 3;
+    uint8_t floatAnnotation2Id = 4;
+    int32_t floatAnnotation1Value = 8;
+    bool floatAnnotation2Value = false;
+
+    int64_t startTime = android::elapsedRealtimeNano();
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, 100);
+    stats_event_write_bool(event, boolValue);
+    stats_event_add_bool_annotation(event, boolAnnotation1Id, boolAnnotation1Value);
+    stats_event_add_int32_annotation(event, boolAnnotation2Id, boolAnnotation2Value);
+    stats_event_write_float(event, floatValue);
+    stats_event_add_int32_annotation(event, floatAnnotation1Id, floatAnnotation1Value);
+    stats_event_add_bool_annotation(event, floatAnnotation2Id, floatAnnotation2Value);
+    stats_event_build(event);
+    int64_t endTime = android::elapsedRealtimeNano();
+
+    size_t bufferSize;
+    uint8_t* buffer = stats_event_get_buffer(event, &bufferSize);
+    uint8_t* bufferEnd = buffer + bufferSize;
+
+    checkMetadata(&buffer, /*numElements=*/2, startTime, endTime, atomId);
+
+    // check first element
+    checkTypeHeader(&buffer, BOOL_TYPE, /*numAnnotations=*/2);
+    checkScalar(&buffer, boolValue);
+    checkAnnotation(&buffer, boolAnnotation1Id, BOOL_TYPE, boolAnnotation1Value);
+    checkAnnotation(&buffer, boolAnnotation2Id, INT32_TYPE, boolAnnotation2Value);
+
+    // check second element
+    checkTypeHeader(&buffer, FLOAT_TYPE, /*numAnnotations=*/2);
+    checkScalar(&buffer, floatValue);
+    checkAnnotation(&buffer, floatAnnotation1Id, INT32_TYPE, floatAnnotation1Value);
+    checkAnnotation(&buffer, floatAnnotation2Id, BOOL_TYPE, floatAnnotation2Value);
+
+    EXPECT_EQ(buffer, bufferEnd);  // ensure that we have read the entire buffer
+    EXPECT_EQ(stats_event_get_errors(event), 0);
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestNoAtomIdError) {
+    struct stats_event* event = stats_event_obtain();
+    // Don't set the atom id in order to trigger the error.
+    stats_event_build(event);
+
+    uint32_t errors = stats_event_get_errors(event);
+    EXPECT_NE(errors | ERROR_NO_ATOM_ID, 0);
+
+    stats_event_release(event);
+}
+
+TEST(StatsEventTest, TestOverflowError) {
+    struct stats_event* event = stats_event_obtain();
+    stats_event_set_atom_id(event, 100);
+    // Add 1000 int32s to the event. Each int32 takes 5 bytes so this will
+    // overflow the 4068 byte buffer.
+    for (int i = 0; i < 1000; i++) {
+        stats_event_write_int32(event, 0);
+    }
+    stats_event_build(event);
+
+    uint32_t errors = stats_event_get_errors(event);
+    EXPECT_NE(errors | ERROR_OVERFLOW, 0);
+
+    stats_event_release(event);
+}
diff --git a/libsync/libsync.map.txt b/libsync/libsync.map.txt
index 53bb07a..91c3528 100644
--- a/libsync/libsync.map.txt
+++ b/libsync/libsync.map.txt
@@ -19,10 +19,10 @@
     sync_merge; # introduced=26
     sync_file_info; # introduced=26
     sync_file_info_free; # introduced=26
-    sync_wait; # vndk
-    sync_fence_info; # vndk
-    sync_pt_info; # vndk
-    sync_fence_info_free; # vndk
+    sync_wait; # llndk
+    sync_fence_info; # llndk
+    sync_pt_info; # llndk
+    sync_fence_info_free; # llndk
   local:
     *;
 };
diff --git a/libsysutils/src/NetlinkEvent.cpp b/libsysutils/src/NetlinkEvent.cpp
index 8fe7854..2351afa 100644
--- a/libsysutils/src/NetlinkEvent.cpp
+++ b/libsysutils/src/NetlinkEvent.cpp
@@ -24,7 +24,6 @@
 #include <linux/if_link.h>
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter/nfnetlink_log.h>
-#include <linux/netfilter_ipv4/ipt_ULOG.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #include <net/if.h>
@@ -39,6 +38,23 @@
 const int LOCAL_QLOG_NL_EVENT = 112;
 const int LOCAL_NFLOG_PACKET = NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET;
 
+/* From deprecated ipt_ULOG.h to parse QLOG_NL_EVENT. */
+#define ULOG_MAC_LEN 80
+#define ULOG_PREFIX_LEN 32
+typedef struct ulog_packet_msg {
+    unsigned long mark;
+    long timestamp_sec;
+    long timestamp_usec;
+    unsigned int hook;
+    char indev_name[IFNAMSIZ];
+    char outdev_name[IFNAMSIZ];
+    size_t data_len;
+    char prefix[ULOG_PREFIX_LEN];
+    unsigned char mac_len;
+    unsigned char mac[ULOG_MAC_LEN];
+    unsigned char payload[0];
+} ulog_packet_msg_t;
+
 #include <android-base/parseint.h>
 #include <log/log.h>
 #include <sysutils/NetlinkEvent.h>
diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index b0f3786..3695f72 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -77,6 +77,7 @@
     ],
 
     cflags: [
+        "-DDEXFILE_SUPPORT",
         "-Wexit-time-destructors",
     ],
 
@@ -89,20 +90,18 @@
             ],
         },
         vendor: {
-            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            cflags: ["-UDEXFILE_SUPPORT"],
             exclude_srcs: [
                 "DexFile.cpp",
-                "DexFiles.cpp",
             ],
             exclude_shared_libs: [
                 "libdexfile_support",
             ],
         },
         recovery: {
-            cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
+            cflags: ["-UDEXFILE_SUPPORT"],
             exclude_srcs: [
                 "DexFile.cpp",
-                "DexFiles.cpp",
             ],
             exclude_shared_libs: [
                 "libdexfile_support",
@@ -239,7 +238,9 @@
         "tests/files/offline/bad_eh_frame_hdr_arm64/*",
         "tests/files/offline/debug_frame_first_x86/*",
         "tests/files/offline/debug_frame_load_bias_arm/*",
+        "tests/files/offline/eh_frame_bias_x86/*",
         "tests/files/offline/eh_frame_hdr_begin_x86_64/*",
+        "tests/files/offline/empty_arm64/*",
         "tests/files/offline/invalid_elf_offset_arm/*",
         "tests/files/offline/jit_debug_arm/*",
         "tests/files/offline/jit_debug_x86/*",
@@ -251,6 +252,7 @@
         "tests/files/offline/shared_lib_in_apk_arm64/*",
         "tests/files/offline/shared_lib_in_apk_memory_only_arm64/*",
         "tests/files/offline/shared_lib_in_apk_single_map_arm64/*",
+        "tests/files/offline/signal_load_bias_arm/*",
         "tests/files/offline/straddle_arm/*",
         "tests/files/offline/straddle_arm64/*",
     ],
diff --git a/libunwindstack/DexFiles.cpp b/libunwindstack/DexFiles.cpp
index 63a77e5..2057fad 100644
--- a/libunwindstack/DexFiles.cpp
+++ b/libunwindstack/DexFiles.cpp
@@ -27,10 +27,21 @@
 #include <unwindstack/Maps.h>
 #include <unwindstack/Memory.h>
 
+#if defined(DEXFILE_SUPPORT)
 #include "DexFile.h"
+#endif
 
 namespace unwindstack {
 
+#if !defined(DEXFILE_SUPPORT)
+// Empty class definition.
+class DexFile {
+ public:
+  DexFile() = default;
+  virtual ~DexFile() = default;
+};
+#endif
+
 struct DEXFileEntry32 {
   uint32_t next;
   uint32_t prev;
@@ -128,6 +139,7 @@
   FindAndReadVariable(maps, "__dex_debug_descriptor");
 }
 
+#if defined(DEXFILE_SUPPORT)
 DexFile* DexFiles::GetDexFile(uint64_t dex_file_offset, MapInfo* info) {
   // Lock while processing the data.
   DexFile* dex_file;
@@ -141,6 +153,11 @@
   }
   return dex_file;
 }
+#else
+DexFile* DexFiles::GetDexFile(uint64_t, MapInfo*) {
+  return nullptr;
+}
+#endif
 
 bool DexFiles::GetAddr(size_t index, uint64_t* addr) {
   if (index < addrs_.size()) {
@@ -154,6 +171,7 @@
   return false;
 }
 
+#if defined(DEXFILE_SUPPORT)
 void DexFiles::GetMethodInformation(Maps* maps, MapInfo* info, uint64_t dex_pc,
                                     std::string* method_name, uint64_t* method_offset) {
   std::lock_guard<std::mutex> guard(lock_);
@@ -175,5 +193,8 @@
     }
   }
 }
+#else
+void DexFiles::GetMethodInformation(Maps*, MapInfo*, uint64_t, std::string*, uint64_t*) {}
+#endif
 
 }  // namespace unwindstack
diff --git a/libunwindstack/DwarfDebugFrame.h b/libunwindstack/DwarfDebugFrame.h
index 388ab0a..635cefd 100644
--- a/libunwindstack/DwarfDebugFrame.h
+++ b/libunwindstack/DwarfDebugFrame.h
@@ -26,9 +26,9 @@
 namespace unwindstack {
 
 template <typename AddressType>
-class DwarfDebugFrame : public DwarfSectionImplNoHdr<AddressType> {
+class DwarfDebugFrame : public DwarfSectionImpl<AddressType> {
  public:
-  DwarfDebugFrame(Memory* memory) : DwarfSectionImplNoHdr<AddressType>(memory) {
+  DwarfDebugFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {
     this->cie32_value_ = static_cast<uint32_t>(-1);
     this->cie64_value_ = static_cast<uint64_t>(-1);
   }
diff --git a/libunwindstack/DwarfEhFrame.h b/libunwindstack/DwarfEhFrame.h
index df441fb..7a41e45 100644
--- a/libunwindstack/DwarfEhFrame.h
+++ b/libunwindstack/DwarfEhFrame.h
@@ -25,9 +25,9 @@
 namespace unwindstack {
 
 template <typename AddressType>
-class DwarfEhFrame : public DwarfSectionImplNoHdr<AddressType> {
+class DwarfEhFrame : public DwarfSectionImpl<AddressType> {
  public:
-  DwarfEhFrame(Memory* memory) : DwarfSectionImplNoHdr<AddressType>(memory) {}
+  DwarfEhFrame(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {}
   virtual ~DwarfEhFrame() = default;
 
   uint64_t GetCieOffsetFromFde32(uint32_t pointer) override {
diff --git a/libunwindstack/DwarfEhFrameWithHdr.cpp b/libunwindstack/DwarfEhFrameWithHdr.cpp
index 24b94f0..1358e51 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.cpp
+++ b/libunwindstack/DwarfEhFrameWithHdr.cpp
@@ -32,14 +32,19 @@
 }
 
 template <typename AddressType>
-bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t size, int64_t section_bias) {
-  section_bias_ = section_bias;
+bool DwarfEhFrameWithHdr<AddressType>::EhFrameInit(uint64_t offset, uint64_t size,
+                                                   int64_t section_bias) {
+  return DwarfSectionImpl<AddressType>::Init(offset, size, section_bias);
+}
 
+template <typename AddressType>
+bool DwarfEhFrameWithHdr<AddressType>::Init(uint64_t offset, uint64_t, int64_t section_bias) {
   memory_.clear_func_offset();
   memory_.clear_text_offset();
   memory_.set_data_offset(offset);
   memory_.set_cur_offset(offset);
-  pc_offset_ = offset;
+
+  hdr_section_bias_ = section_bias;
 
   // Read the first four bytes all at once.
   uint8_t data[4];
@@ -56,7 +61,7 @@
     return false;
   }
 
-  ptr_encoding_ = data[1];
+  uint8_t ptr_encoding = data[1];
   uint8_t fde_count_encoding = data[2];
   table_encoding_ = data[3];
   table_entry_size_ = memory_.template GetEncodedSize<AddressType>(table_encoding_);
@@ -70,7 +75,8 @@
   }
 
   memory_.set_pc_offset(memory_.cur_offset());
-  if (!memory_.template ReadEncodedValue<AddressType>(ptr_encoding_, &ptr_offset_)) {
+  uint64_t ptr_offset;
+  if (!memory_.template ReadEncodedValue<AddressType>(ptr_encoding, &ptr_offset)) {
     last_error_.code = DWARF_ERROR_MEMORY_INVALID;
     last_error_.address = memory_.cur_offset();
     return false;
@@ -88,10 +94,8 @@
     return false;
   }
 
-  entries_offset_ = memory_.cur_offset();
-  entries_end_ = offset + size;
-  entries_data_offset_ = offset;
-  cur_entries_offset_ = entries_offset_;
+  hdr_entries_offset_ = memory_.cur_offset();
+  hdr_entries_data_offset_ = offset;
 
   return true;
 }
@@ -107,6 +111,16 @@
     return nullptr;
   }
 
+  // There is a possibility that this entry points to a zero length FDE
+  // due to a bug. If this happens, try and find the non-zero length FDE
+  // from eh_frame directly. See b/142483624.
+  if (fde->pc_start == fde->pc_end) {
+    fde = DwarfSectionImpl<AddressType>::GetFdeFromPc(pc);
+    if (fde == nullptr) {
+      return nullptr;
+    }
+  }
+
   // Guaranteed pc >= pc_start, need to check pc in the fde range.
   if (pc < fde->pc_end) {
     return fde;
@@ -124,8 +138,8 @@
   }
   FdeInfo* info = &fde_info_[index];
 
-  memory_.set_data_offset(entries_data_offset_);
-  memory_.set_cur_offset(entries_offset_ + 2 * index * table_entry_size_);
+  memory_.set_data_offset(hdr_entries_data_offset_);
+  memory_.set_cur_offset(hdr_entries_offset_ + 2 * index * table_entry_size_);
   memory_.set_pc_offset(0);
   uint64_t value;
   if (!memory_.template ReadEncodedValue<AddressType>(table_encoding_, &value) ||
@@ -138,7 +152,7 @@
 
   // Relative encodings require adding in the load bias.
   if (IsEncodingRelative(table_encoding_)) {
-    value += section_bias_;
+    value += hdr_section_bias_;
   }
   info->pc = value;
   return info;
@@ -190,6 +204,16 @@
     if (fde == nullptr) {
       break;
     }
+
+    // There is a possibility that this entry points to a zero length FDE
+    // due to a bug. If this happens, try and find the non-zero length FDE
+    // from eh_frame directly. See b/142483624.
+    if (fde->pc_start == fde->pc_end) {
+      const DwarfFde* fde_real = DwarfSectionImpl<AddressType>::GetFdeFromPc(fde->pc_start);
+      if (fde_real != nullptr) {
+        fde = fde_real;
+      }
+    }
     fdes->push_back(fde);
   }
 }
diff --git a/libunwindstack/DwarfEhFrameWithHdr.h b/libunwindstack/DwarfEhFrameWithHdr.h
index b8dd3dd..f7c010c 100644
--- a/libunwindstack/DwarfEhFrameWithHdr.h
+++ b/libunwindstack/DwarfEhFrameWithHdr.h
@@ -34,11 +34,7 @@
   // Add these so that the protected members of DwarfSectionImpl
   // can be accessed without needing a this->.
   using DwarfSectionImpl<AddressType>::memory_;
-  using DwarfSectionImpl<AddressType>::pc_offset_;
-  using DwarfSectionImpl<AddressType>::entries_offset_;
-  using DwarfSectionImpl<AddressType>::entries_end_;
   using DwarfSectionImpl<AddressType>::last_error_;
-  using DwarfSectionImpl<AddressType>::section_bias_;
 
   struct FdeInfo {
     AddressType pc;
@@ -49,18 +45,19 @@
   virtual ~DwarfEhFrameWithHdr() = default;
 
   uint64_t GetCieOffsetFromFde32(uint32_t pointer) override {
-    return this->memory_.cur_offset() - pointer - 4;
+    return memory_.cur_offset() - pointer - 4;
   }
 
   uint64_t GetCieOffsetFromFde64(uint64_t pointer) override {
-    return this->memory_.cur_offset() - pointer - 8;
+    return memory_.cur_offset() - pointer - 8;
   }
 
   uint64_t AdjustPcFromFde(uint64_t pc) override {
     // The eh_frame uses relative pcs.
-    return pc + this->memory_.cur_offset() - 4;
+    return pc + memory_.cur_offset() - 4;
   }
 
+  bool EhFrameInit(uint64_t offset, uint64_t size, int64_t section_bias);
   bool Init(uint64_t offset, uint64_t size, int64_t section_bias) override;
 
   const DwarfFde* GetFdeFromPc(uint64_t pc) override;
@@ -72,17 +69,15 @@
   void GetFdes(std::vector<const DwarfFde*>* fdes) override;
 
  protected:
-  uint8_t version_;
-  uint8_t ptr_encoding_;
-  uint8_t table_encoding_;
-  size_t table_entry_size_;
+  uint8_t version_ = 0;
+  uint8_t table_encoding_ = 0;
+  size_t table_entry_size_ = 0;
 
-  uint64_t ptr_offset_;
+  uint64_t hdr_entries_offset_ = 0;
+  uint64_t hdr_entries_data_offset_ = 0;
+  uint64_t hdr_section_bias_ = 0;
 
-  uint64_t entries_data_offset_;
-  uint64_t cur_entries_offset_ = 0;
-
-  uint64_t fde_count_;
+  uint64_t fde_count_ = 0;
   std::unordered_map<uint64_t, FdeInfo> fde_info_;
 };
 
diff --git a/libunwindstack/DwarfSection.cpp b/libunwindstack/DwarfSection.cpp
index cdb6141..e6263f8 100644
--- a/libunwindstack/DwarfSection.cpp
+++ b/libunwindstack/DwarfSection.cpp
@@ -69,6 +69,7 @@
     return &cie_entry->second;
   }
   DwarfCie* cie = &cie_entries_[offset];
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(offset);
   if (!FillInCieHeader(cie) || !FillInCie(cie)) {
     // Erase the cached entry.
@@ -251,6 +252,7 @@
     return &fde_entry->second;
   }
   DwarfFde* fde = &fde_entries_[offset];
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(offset);
   if (!FillInFdeHeader(fde) || !FillInFde(fde)) {
     fde_entries_.erase(offset);
@@ -591,8 +593,7 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImplNoHdr<AddressType>::Init(uint64_t offset, uint64_t size,
-                                              int64_t section_bias) {
+bool DwarfSectionImpl<AddressType>::Init(uint64_t offset, uint64_t size, int64_t section_bias) {
   section_bias_ = section_bias;
   entries_offset_ = offset;
   next_entries_offset_ = offset;
@@ -601,7 +602,6 @@
   memory_.clear_func_offset();
   memory_.clear_text_offset();
   memory_.set_cur_offset(offset);
-  memory_.set_data_offset(offset);
   pc_offset_ = offset;
 
   return true;
@@ -617,7 +617,7 @@
 // and an fde has a start pc of 0x100 and end pc of 0x500, two new entries
 // will be added: 0x200, 0x100 and 0x500, 0x400.
 template <typename AddressType>
-void DwarfSectionImplNoHdr<AddressType>::InsertFde(const DwarfFde* fde) {
+void DwarfSectionImpl<AddressType>::InsertFde(const DwarfFde* fde) {
   uint64_t start = fde->pc_start;
   uint64_t end = fde->pc_end;
   auto it = fdes_.upper_bound(start);
@@ -654,9 +654,10 @@
 }
 
 template <typename AddressType>
-bool DwarfSectionImplNoHdr<AddressType>::GetNextCieOrFde(DwarfFde** fde_entry) {
+bool DwarfSectionImpl<AddressType>::GetNextCieOrFde(const DwarfFde** fde_entry) {
   uint64_t start_offset = next_entries_offset_;
 
+  memory_.set_data_offset(entries_offset_);
   memory_.set_cur_offset(next_entries_offset_);
   uint32_t value32;
   if (!memory_.ReadBytes(&value32, sizeof(value32))) {
@@ -689,7 +690,7 @@
       entry_is_cie = true;
       cie_fde_encoding = DW_EH_PE_sdata8;
     } else {
-      cie_offset = this->GetCieOffsetFromFde64(value64);
+      cie_offset = GetCieOffsetFromFde64(value64);
     }
   } else {
     next_entries_offset_ = memory_.cur_offset() + value32;
@@ -705,37 +706,45 @@
       entry_is_cie = true;
       cie_fde_encoding = DW_EH_PE_sdata4;
     } else {
-      cie_offset = this->GetCieOffsetFromFde32(value32);
+      cie_offset = GetCieOffsetFromFde32(value32);
     }
   }
 
   if (entry_is_cie) {
-    DwarfCie* cie = &cie_entries_[start_offset];
-    cie->lsda_encoding = DW_EH_PE_omit;
-    cie->cfa_instructions_end = next_entries_offset_;
-    cie->fde_address_encoding = cie_fde_encoding;
+    auto entry = cie_entries_.find(start_offset);
+    if (entry == cie_entries_.end()) {
+      DwarfCie* cie = &cie_entries_[start_offset];
+      cie->lsda_encoding = DW_EH_PE_omit;
+      cie->cfa_instructions_end = next_entries_offset_;
+      cie->fde_address_encoding = cie_fde_encoding;
 
-    if (!this->FillInCie(cie)) {
-      cie_entries_.erase(start_offset);
-      return false;
+      if (!FillInCie(cie)) {
+        cie_entries_.erase(start_offset);
+        return false;
+      }
     }
     *fde_entry = nullptr;
   } else {
-    DwarfFde* fde = &fde_entries_[start_offset];
-    fde->cfa_instructions_end = next_entries_offset_;
-    fde->cie_offset = cie_offset;
+    auto entry = fde_entries_.find(start_offset);
+    if (entry != fde_entries_.end()) {
+      *fde_entry = &entry->second;
+    } else {
+      DwarfFde* fde = &fde_entries_[start_offset];
+      fde->cfa_instructions_end = next_entries_offset_;
+      fde->cie_offset = cie_offset;
 
-    if (!this->FillInFde(fde)) {
-      fde_entries_.erase(start_offset);
-      return false;
+      if (!FillInFde(fde)) {
+        fde_entries_.erase(start_offset);
+        return false;
+      }
+      *fde_entry = fde;
     }
-    *fde_entry = fde;
   }
   return true;
 }
 
 template <typename AddressType>
-void DwarfSectionImplNoHdr<AddressType>::GetFdes(std::vector<const DwarfFde*>* fdes) {
+void DwarfSectionImpl<AddressType>::GetFdes(std::vector<const DwarfFde*>* fdes) {
   // Loop through the already cached entries.
   uint64_t entry_offset = entries_offset_;
   while (entry_offset < next_entries_offset_) {
@@ -754,7 +763,7 @@
   }
 
   while (next_entries_offset_ < entries_end_) {
-    DwarfFde* fde;
+    const DwarfFde* fde;
     if (!GetNextCieOrFde(&fde)) {
       break;
     }
@@ -771,7 +780,7 @@
 }
 
 template <typename AddressType>
-const DwarfFde* DwarfSectionImplNoHdr<AddressType>::GetFdeFromPc(uint64_t pc) {
+const DwarfFde* DwarfSectionImpl<AddressType>::GetFdeFromPc(uint64_t pc) {
   // Search in the list of fdes we already have.
   auto it = fdes_.upper_bound(pc);
   if (it != fdes_.end()) {
@@ -784,7 +793,7 @@
   // to do a linear search of the fdes by pc. As fdes are read, a cached
   // search map is created.
   while (next_entries_offset_ < entries_end_) {
-    DwarfFde* fde;
+    const DwarfFde* fde;
     if (!GetNextCieOrFde(&fde)) {
       return nullptr;
     }
@@ -807,10 +816,6 @@
 template class DwarfSectionImpl<uint32_t>;
 template class DwarfSectionImpl<uint64_t>;
 
-// Explicitly instantiate DwarfSectionImplNoHdr
-template class DwarfSectionImplNoHdr<uint32_t>;
-template class DwarfSectionImplNoHdr<uint64_t>;
-
 // Explicitly instantiate DwarfDebugFrame
 template class DwarfDebugFrame<uint32_t>;
 template class DwarfDebugFrame<uint64_t>;
diff --git a/libunwindstack/Elf.cpp b/libunwindstack/Elf.cpp
index c141b2e..f01b092 100644
--- a/libunwindstack/Elf.cpp
+++ b/libunwindstack/Elf.cpp
@@ -112,35 +112,33 @@
                      gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
 }
 
-bool Elf::GetGlobalVariable(const std::string& name, uint64_t* memory_address) {
+bool Elf::GetGlobalVariableOffset(const std::string& name, uint64_t* memory_offset) {
   if (!valid_) {
     return false;
   }
 
-  if (!interface_->GetGlobalVariable(name, memory_address) &&
+  uint64_t vaddr;
+  if (!interface_->GetGlobalVariable(name, &vaddr) &&
       (gnu_debugdata_interface_ == nullptr ||
-       !gnu_debugdata_interface_->GetGlobalVariable(name, memory_address))) {
+       !gnu_debugdata_interface_->GetGlobalVariable(name, &vaddr))) {
     return false;
   }
 
-  // Adjust by the load bias.
-  if (load_bias_ > 0 && *memory_address < static_cast<uint64_t>(load_bias_)) {
-    return false;
+  // Check the .data section.
+  uint64_t vaddr_start = interface_->data_vaddr_start();
+  if (vaddr >= vaddr_start && vaddr < interface_->data_vaddr_end()) {
+    *memory_offset = vaddr - vaddr_start + interface_->data_offset();
+    return true;
   }
 
-  *memory_address -= load_bias_;
-
-  // If this winds up in the dynamic section, then we might need to adjust
-  // the address.
-  uint64_t dynamic_end = interface_->dynamic_vaddr() + interface_->dynamic_size();
-  if (*memory_address >= interface_->dynamic_vaddr() && *memory_address < dynamic_end) {
-    if (interface_->dynamic_vaddr() > interface_->dynamic_offset()) {
-      *memory_address -= interface_->dynamic_vaddr() - interface_->dynamic_offset();
-    } else {
-      *memory_address += interface_->dynamic_offset() - interface_->dynamic_vaddr();
-    }
+  // Check the .dynamic section.
+  vaddr_start = interface_->dynamic_vaddr_start();
+  if (vaddr >= vaddr_start && vaddr < interface_->dynamic_vaddr_end()) {
+    *memory_offset = vaddr - vaddr_start + interface_->dynamic_offset();
+    return true;
   }
-  return true;
+
+  return false;
 }
 
 std::string Elf::GetBuildID() {
@@ -175,7 +173,12 @@
   if (!valid_) {
     return false;
   }
-  return regs->StepIfSignalHandler(rel_pc, this, process_memory);
+
+  // Convert the rel_pc to an elf_offset.
+  if (rel_pc < static_cast<uint64_t>(load_bias_)) {
+    return false;
+  }
+  return regs->StepIfSignalHandler(rel_pc - load_bias_, this, process_memory);
 }
 
 // The relative pc is always relative to the start of the map from which it comes.
diff --git a/libunwindstack/ElfInterface.cpp b/libunwindstack/ElfInterface.cpp
index e34273c..341275d 100644
--- a/libunwindstack/ElfInterface.cpp
+++ b/libunwindstack/ElfInterface.cpp
@@ -78,10 +78,31 @@
   CrcGenerateTable();
   Crc64GenerateTable();
 
-  std::vector<uint8_t> src(gnu_debugdata_size_);
-  if (!memory_->ReadFully(gnu_debugdata_offset_, src.data(), gnu_debugdata_size_)) {
-    gnu_debugdata_offset_ = 0;
-    gnu_debugdata_size_ = static_cast<uint64_t>(-1);
+  // Verify the request is not larger than the max size_t value.
+  if (gnu_debugdata_size_ > SIZE_MAX) {
+    return nullptr;
+  }
+  size_t initial_buffer_size;
+  if (__builtin_mul_overflow(5, gnu_debugdata_size_, &initial_buffer_size)) {
+    return nullptr;
+  }
+
+  size_t buffer_increment;
+  if (__builtin_mul_overflow(2, gnu_debugdata_size_, &buffer_increment)) {
+    return nullptr;
+  }
+
+  std::unique_ptr<uint8_t[]> src(new (std::nothrow) uint8_t[gnu_debugdata_size_]);
+  if (src.get() == nullptr) {
+    return nullptr;
+  }
+
+  std::unique_ptr<MemoryBuffer> dst(new MemoryBuffer);
+  if (!dst->Resize(initial_buffer_size)) {
+    return nullptr;
+  }
+
+  if (!memory_->ReadFully(gnu_debugdata_offset_, src.get(), gnu_debugdata_size_)) {
     return nullptr;
   }
 
@@ -89,21 +110,23 @@
   CXzUnpacker state;
   alloc.Alloc = [](ISzAllocPtr, size_t size) { return malloc(size); };
   alloc.Free = [](ISzAllocPtr, void* ptr) { return free(ptr); };
-
   XzUnpacker_Construct(&state, &alloc);
 
-  std::unique_ptr<MemoryBuffer> dst(new MemoryBuffer);
   int return_val;
   size_t src_offset = 0;
   size_t dst_offset = 0;
   ECoderStatus status;
-  dst->Resize(5 * gnu_debugdata_size_);
   do {
-    size_t src_remaining = src.size() - src_offset;
+    size_t src_remaining = gnu_debugdata_size_ - src_offset;
     size_t dst_remaining = dst->Size() - dst_offset;
-    if (dst_remaining < 2 * gnu_debugdata_size_) {
-      dst->Resize(dst->Size() + 2 * gnu_debugdata_size_);
-      dst_remaining += 2 * gnu_debugdata_size_;
+    if (dst_remaining < buffer_increment) {
+      size_t new_size;
+      if (__builtin_add_overflow(dst->Size(), buffer_increment, &new_size) ||
+          !dst->Resize(new_size)) {
+        XzUnpacker_Free(&state);
+        return nullptr;
+      }
+      dst_remaining += buffer_increment;
     }
     return_val = XzUnpacker_Code(&state, dst->GetPtr(dst_offset), &dst_remaining, &src[src_offset],
                                  &src_remaining, true, CODER_FINISH_ANY, &status);
@@ -112,13 +135,13 @@
   } while (return_val == SZ_OK && status == CODER_STATUS_NOT_FINISHED);
   XzUnpacker_Free(&state);
   if (return_val != SZ_OK || !XzUnpacker_IsStreamWasFinished(&state)) {
-    gnu_debugdata_offset_ = 0;
-    gnu_debugdata_size_ = static_cast<uint64_t>(-1);
     return nullptr;
   }
 
   // Shrink back down to the exact size.
-  dst->Resize(dst_offset);
+  if (!dst->Resize(dst_offset)) {
+    return nullptr;
+  }
 
   return dst.release();
 }
@@ -126,8 +149,10 @@
 template <typename AddressType>
 void ElfInterface::InitHeadersWithTemplate() {
   if (eh_frame_hdr_offset_ != 0) {
-    eh_frame_.reset(new DwarfEhFrameWithHdr<AddressType>(memory_));
-    if (!eh_frame_->Init(eh_frame_hdr_offset_, eh_frame_hdr_size_, eh_frame_hdr_section_bias_)) {
+    DwarfEhFrameWithHdr<AddressType>* eh_frame_hdr = new DwarfEhFrameWithHdr<AddressType>(memory_);
+    eh_frame_.reset(eh_frame_hdr);
+    if (!eh_frame_hdr->EhFrameInit(eh_frame_offset_, eh_frame_size_, eh_frame_section_bias_) ||
+        !eh_frame_->Init(eh_frame_hdr_offset_, eh_frame_hdr_size_, eh_frame_hdr_section_bias_)) {
       eh_frame_.reset(nullptr);
     }
   }
@@ -228,14 +253,18 @@
     case PT_GNU_EH_FRAME:
       // This is really the pointer to the .eh_frame_hdr section.
       eh_frame_hdr_offset_ = phdr.p_offset;
-      eh_frame_hdr_section_bias_ = static_cast<uint64_t>(phdr.p_paddr) - phdr.p_offset;
+      eh_frame_hdr_section_bias_ = static_cast<uint64_t>(phdr.p_vaddr) - phdr.p_offset;
       eh_frame_hdr_size_ = phdr.p_memsz;
       break;
 
     case PT_DYNAMIC:
       dynamic_offset_ = phdr.p_offset;
-      dynamic_vaddr_ = phdr.p_vaddr;
-      dynamic_size_ = phdr.p_memsz;
+      dynamic_vaddr_start_ = phdr.p_vaddr;
+      if (__builtin_add_overflow(dynamic_vaddr_start_, phdr.p_memsz, &dynamic_vaddr_end_)) {
+        dynamic_offset_ = 0;
+        dynamic_vaddr_start_ = 0;
+        dynamic_vaddr_end_ = 0;
+      }
       break;
 
     default:
@@ -358,6 +387,14 @@
             eh_frame_hdr_offset_ = shdr.sh_offset;
             eh_frame_hdr_section_bias_ = static_cast<uint64_t>(shdr.sh_addr) - shdr.sh_offset;
             eh_frame_hdr_size_ = shdr.sh_size;
+          } else if (name == ".data") {
+            data_offset_ = shdr.sh_offset;
+            data_vaddr_start_ = shdr.sh_addr;
+            if (__builtin_add_overflow(data_vaddr_start_, shdr.sh_size, &data_vaddr_end_)) {
+              data_offset_ = 0;
+              data_vaddr_start_ = 0;
+              data_vaddr_end_ = 0;
+            }
           }
         }
       }
@@ -396,7 +433,7 @@
   // Find the soname location from the dynamic headers section.
   DynType dyn;
   uint64_t offset = dynamic_offset_;
-  uint64_t max_offset = offset + dynamic_size_;
+  uint64_t max_offset = offset + dynamic_vaddr_end_ - dynamic_vaddr_start_;
   for (uint64_t offset = dynamic_offset_; offset < max_offset; offset += sizeof(DynType)) {
     if (!memory_->ReadFully(offset, &dyn, sizeof(dyn))) {
       last_error_.code = ERROR_MEMORY_INVALID;
diff --git a/libunwindstack/Global.cpp b/libunwindstack/Global.cpp
index a20be00..ee6c8a5 100644
--- a/libunwindstack/Global.cpp
+++ b/libunwindstack/Global.cpp
@@ -39,28 +39,22 @@
   }
 }
 
-uint64_t Global::GetVariableOffset(MapInfo* info, const std::string& variable) {
-  if (!search_libs_.empty()) {
-    bool found = false;
-    const char* lib = basename(info->name.c_str());
-    for (const std::string& name : search_libs_) {
-      if (name == lib) {
-        found = true;
-        break;
-      }
-    }
-    if (!found) {
-      return 0;
-    }
+bool Global::Searchable(const std::string& name) {
+  if (search_libs_.empty()) {
+    return true;
   }
 
-  Elf* elf = info->GetElf(memory_, arch());
-  uint64_t ptr;
-  // Find first non-empty list (libraries might be loaded multiple times).
-  if (elf->GetGlobalVariable(variable, &ptr) && ptr != 0) {
-    return ptr + info->start;
+  if (name.empty()) {
+    return false;
   }
-  return 0;
+
+  const char* base_name = basename(name.c_str());
+  for (const std::string& lib : search_libs_) {
+    if (base_name == lib) {
+      return true;
+    }
+  }
+  return false;
 }
 
 void Global::FindAndReadVariable(Maps* maps, const char* var_str) {
@@ -76,27 +70,28 @@
   // This also works:
   //   f0000-f2000 0 r-- /system/lib/libc.so
   //   f2000-f3000 2000 rw- /system/lib/libc.so
-  MapInfo* map_start = nullptr;
+  // It is also possible to see empty maps after the read-only like so:
+  //   f0000-f1000 0 r-- /system/lib/libc.so
+  //   f1000-f2000 0 ---
+  //   f2000-f3000 1000 r-x /system/lib/libc.so
+  //   f3000-f4000 2000 rw- /system/lib/libc.so
+  MapInfo* map_zero = nullptr;
   for (const auto& info : *maps) {
-    if (map_start != nullptr) {
-      if (map_start->name == info->name) {
-        if (info->offset != 0 &&
-            (info->flags & (PROT_READ | PROT_WRITE)) == (PROT_READ | PROT_WRITE)) {
-          uint64_t ptr = GetVariableOffset(map_start, variable);
-          if (ptr != 0 && ReadVariableData(ptr)) {
+    if (info->offset != 0 && (info->flags & (PROT_READ | PROT_WRITE)) == (PROT_READ | PROT_WRITE) &&
+        map_zero != nullptr && Searchable(info->name) && info->name == map_zero->name) {
+      Elf* elf = map_zero->GetElf(memory_, arch());
+      uint64_t ptr;
+      if (elf->GetGlobalVariableOffset(variable, &ptr) && ptr != 0) {
+        uint64_t offset_end = info->offset + info->end - info->start;
+        if (ptr >= info->offset && ptr < offset_end) {
+          ptr = info->start + ptr - info->offset;
+          if (ReadVariableData(ptr)) {
             break;
-          } else {
-            // Failed to find the global variable, do not bother trying again.
-            map_start = nullptr;
           }
         }
-      } else {
-        map_start = nullptr;
       }
-    }
-    if (map_start == nullptr && (info->flags & PROT_READ) && info->offset == 0 &&
-        !info->name.empty()) {
-      map_start = info.get();
+    } else if (info->offset == 0 && !info->name.empty()) {
+      map_zero = info.get();
     }
   }
 }
diff --git a/libunwindstack/MapInfo.cpp b/libunwindstack/MapInfo.cpp
index f2dad84..31f3144 100644
--- a/libunwindstack/MapInfo.cpp
+++ b/libunwindstack/MapInfo.cpp
@@ -37,12 +37,12 @@
 bool MapInfo::InitFileMemoryFromPreviousReadOnlyMap(MemoryFileAtOffset* memory) {
   // One last attempt, see if the previous map is read-only with the
   // same name and stretches across this map.
-  if (prev_map == nullptr || prev_map->flags != PROT_READ) {
+  if (prev_real_map == nullptr || prev_real_map->flags != PROT_READ) {
     return false;
   }
 
-  uint64_t map_size = end - prev_map->end;
-  if (!memory->Init(name, prev_map->offset, map_size)) {
+  uint64_t map_size = end - prev_real_map->end;
+  if (!memory->Init(name, prev_real_map->offset, map_size)) {
     return false;
   }
 
@@ -51,12 +51,12 @@
     return false;
   }
 
-  if (!memory->Init(name, prev_map->offset, max_size)) {
+  if (!memory->Init(name, prev_real_map->offset, max_size)) {
     return false;
   }
 
-  elf_offset = offset - prev_map->offset;
-  elf_start_offset = prev_map->offset;
+  elf_offset = offset - prev_real_map->offset;
+  elf_start_offset = prev_real_map->offset;
   return true;
 }
 
@@ -112,8 +112,8 @@
     // Need to check how to set the elf start offset. If this map is not
     // the r-x map of a r-- map, then use the real offset value. Otherwise,
     // use 0.
-    if (prev_map == nullptr || prev_map->offset != 0 || prev_map->flags != PROT_READ ||
-        prev_map->name != name) {
+    if (prev_real_map == nullptr || prev_real_map->offset != 0 ||
+        prev_real_map->flags != PROT_READ || prev_real_map->name != name) {
       elf_start_offset = offset;
     }
     return memory.release();
@@ -172,20 +172,20 @@
   // doesn't guarantee that this invariant will always be true. However,
   // if that changes, there is likely something else that will change and
   // break something.
-  if (offset == 0 || name.empty() || prev_map == nullptr || prev_map->name != name ||
-      prev_map->offset >= offset) {
+  if (offset == 0 || name.empty() || prev_real_map == nullptr || prev_real_map->name != name ||
+      prev_real_map->offset >= offset) {
     return nullptr;
   }
 
   // Make sure that relative pc values are corrected properly.
-  elf_offset = offset - prev_map->offset;
+  elf_offset = offset - prev_real_map->offset;
   // Use this as the elf start offset, otherwise, you always get offsets into
   // the r-x section, which is not quite the right information.
-  elf_start_offset = prev_map->offset;
+  elf_start_offset = prev_real_map->offset;
 
   MemoryRanges* ranges = new MemoryRanges;
-  ranges->Insert(
-      new MemoryRange(process_memory, prev_map->start, prev_map->end - prev_map->start, 0));
+  ranges->Insert(new MemoryRange(process_memory, prev_real_map->start,
+                                 prev_real_map->end - prev_real_map->start, 0));
   ranges->Insert(new MemoryRange(process_memory, start, end - start, elf_offset));
 
   memory_backed_elf = true;
@@ -236,15 +236,15 @@
 
   if (!elf->valid()) {
     elf_start_offset = offset;
-  } else if (prev_map != nullptr && elf_start_offset != offset &&
-             prev_map->offset == elf_start_offset && prev_map->name == name) {
+  } else if (prev_real_map != nullptr && elf_start_offset != offset &&
+             prev_real_map->offset == elf_start_offset && prev_real_map->name == name) {
     // If there is a read-only map then a read-execute map that represents the
     // same elf object, make sure the previous map is using the same elf
     // object if it hasn't already been set.
-    std::lock_guard<std::mutex> guard(prev_map->mutex_);
-    if (prev_map->elf.get() == nullptr) {
-      prev_map->elf = elf;
-      prev_map->memory_backed_elf = memory_backed_elf;
+    std::lock_guard<std::mutex> guard(prev_real_map->mutex_);
+    if (prev_real_map->elf.get() == nullptr) {
+      prev_real_map->elf = elf;
+      prev_real_map->memory_backed_elf = memory_backed_elf;
     }
   }
   return elf.get();
diff --git a/libunwindstack/Maps.cpp b/libunwindstack/Maps.cpp
index 250e600..8f49ad9 100644
--- a/libunwindstack/Maps.cpp
+++ b/libunwindstack/Maps.cpp
@@ -60,6 +60,8 @@
 }
 
 bool Maps::Parse() {
+  MapInfo* prev_map = nullptr;
+  MapInfo* prev_real_map = nullptr;
   return android::procinfo::ReadMapFile(
       GetMapsFile(),
       [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t, const char* name) {
@@ -67,17 +69,24 @@
         if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
           flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
         }
-        maps_.emplace_back(
-            new MapInfo(maps_.empty() ? nullptr : maps_.back().get(), start, end, pgoff,
-                        flags, name));
+        maps_.emplace_back(new MapInfo(prev_map, prev_real_map, start, end, pgoff, flags, name));
+        prev_map = maps_.back().get();
+        if (!prev_map->IsBlank()) {
+          prev_real_map = prev_map;
+        }
       });
 }
 
 void Maps::Add(uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
                const std::string& name, uint64_t load_bias) {
+  MapInfo* prev_map = maps_.empty() ? nullptr : maps_.back().get();
+  MapInfo* prev_real_map = prev_map;
+  while (prev_real_map != nullptr && prev_real_map->IsBlank()) {
+    prev_real_map = prev_real_map->prev_map;
+  }
+
   auto map_info =
-      std::make_unique<MapInfo>(maps_.empty() ? nullptr : maps_.back().get(), start, end, offset,
-                                flags, name);
+      std::make_unique<MapInfo>(prev_map, prev_real_map, start, end, offset, flags, name);
   map_info->load_bias = load_bias;
   maps_.emplace_back(std::move(map_info));
 }
@@ -89,14 +98,21 @@
 
   // Set the prev_map values on the info objects.
   MapInfo* prev_map = nullptr;
+  MapInfo* prev_real_map = nullptr;
   for (const auto& map_info : maps_) {
     map_info->prev_map = prev_map;
+    map_info->prev_real_map = prev_real_map;
     prev_map = map_info.get();
+    if (!prev_map->IsBlank()) {
+      prev_real_map = prev_map;
+    }
   }
 }
 
 bool BufferMaps::Parse() {
   std::string content(buffer_);
+  MapInfo* prev_map = nullptr;
+  MapInfo* prev_real_map = nullptr;
   return android::procinfo::ReadMapFileContent(
       &content[0],
       [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t, const char* name) {
@@ -104,9 +120,11 @@
         if (strncmp(name, "/dev/", 5) == 0 && strncmp(name + 5, "ashmem/", 7) != 0) {
           flags |= unwindstack::MAPS_FLAGS_DEVICE_MAP;
         }
-        maps_.emplace_back(
-            new MapInfo(maps_.empty() ? nullptr : maps_.back().get(), start, end, pgoff,
-                        flags, name));
+        maps_.emplace_back(new MapInfo(prev_map, prev_real_map, start, end, pgoff, flags, name));
+        prev_map = maps_.back().get();
+        if (!prev_map->IsBlank()) {
+          prev_real_map = prev_map;
+        }
       });
 }
 
@@ -139,6 +157,9 @@
       if (start == info->start && end == info->end && flags == info->flags && *name == info->name) {
         // No need to check
         search_map_idx = old_map_idx + 1;
+        if (new_map_idx + 1 < maps_.size()) {
+          maps_[new_map_idx + 1]->prev_map = info.get();
+        }
         maps_[new_map_idx] = nullptr;
         total_entries--;
         break;
diff --git a/libunwindstack/Memory.cpp b/libunwindstack/Memory.cpp
index a66cd5b..8de3d98 100644
--- a/libunwindstack/Memory.cpp
+++ b/libunwindstack/Memory.cpp
@@ -206,12 +206,12 @@
 }
 
 size_t MemoryBuffer::Read(uint64_t addr, void* dst, size_t size) {
-  if (addr >= raw_.size()) {
+  if (addr >= size_) {
     return 0;
   }
 
-  size_t bytes_left = raw_.size() - static_cast<size_t>(addr);
-  const unsigned char* actual_base = static_cast<const unsigned char*>(raw_.data()) + addr;
+  size_t bytes_left = size_ - static_cast<size_t>(addr);
+  const unsigned char* actual_base = static_cast<const unsigned char*>(raw_) + addr;
   size_t actual_len = std::min(bytes_left, size);
 
   memcpy(dst, actual_base, actual_len);
@@ -219,7 +219,7 @@
 }
 
 uint8_t* MemoryBuffer::GetPtr(size_t offset) {
-  if (offset < raw_.size()) {
+  if (offset < size_) {
     return &raw_[offset];
   }
   return nullptr;
diff --git a/libunwindstack/MemoryBuffer.h b/libunwindstack/MemoryBuffer.h
index 3fe4bbb..a91e59f 100644
--- a/libunwindstack/MemoryBuffer.h
+++ b/libunwindstack/MemoryBuffer.h
@@ -29,18 +29,27 @@
 class MemoryBuffer : public Memory {
  public:
   MemoryBuffer() = default;
-  virtual ~MemoryBuffer() = default;
+  virtual ~MemoryBuffer() { free(raw_); }
 
   size_t Read(uint64_t addr, void* dst, size_t size) override;
 
   uint8_t* GetPtr(size_t offset);
 
-  void Resize(size_t size) { raw_.resize(size); }
+  bool Resize(size_t size) {
+    raw_ = reinterpret_cast<uint8_t*>(realloc(raw_, size));
+    if (raw_ == nullptr) {
+      size_ = 0;
+      return false;
+    }
+    size_ = size;
+    return true;
+  }
 
-  uint64_t Size() { return raw_.size(); }
+  uint64_t Size() { return size_; }
 
  private:
-  std::vector<uint8_t> raw_;
+  uint8_t* raw_ = nullptr;
+  size_t size_ = 0;
 };
 
 }  // namespace unwindstack
diff --git a/libunwindstack/RegsArm.cpp b/libunwindstack/RegsArm.cpp
index 885dc94..1b1f7eb 100644
--- a/libunwindstack/RegsArm.cpp
+++ b/libunwindstack/RegsArm.cpp
@@ -127,12 +127,12 @@
   return regs;
 }
 
-bool RegsArm::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsArm::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint32_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsArm64.cpp b/libunwindstack/RegsArm64.cpp
index e9787aa..00b3367 100644
--- a/libunwindstack/RegsArm64.cpp
+++ b/libunwindstack/RegsArm64.cpp
@@ -100,19 +100,21 @@
   fn("x27", regs_[ARM64_REG_R27]);
   fn("x28", regs_[ARM64_REG_R28]);
   fn("x29", regs_[ARM64_REG_R29]);
-  fn("sp", regs_[ARM64_REG_SP]);
   fn("lr", regs_[ARM64_REG_LR]);
+  fn("sp", regs_[ARM64_REG_SP]);
   fn("pc", regs_[ARM64_REG_PC]);
+  fn("pst", regs_[ARM64_REG_PSTATE]);
 }
 
 Regs* RegsArm64::Read(void* remote_data) {
   arm64_user_regs* user = reinterpret_cast<arm64_user_regs*>(remote_data);
 
   RegsArm64* regs = new RegsArm64();
-  memcpy(regs->RawData(), &user->regs[0], (ARM64_REG_R31 + 1) * sizeof(uint64_t));
+  memcpy(regs->RawData(), &user->regs[0], (ARM64_REG_R30 + 1) * sizeof(uint64_t));
   uint64_t* reg_data = reinterpret_cast<uint64_t*>(regs->RawData());
-  reg_data[ARM64_REG_PC] = user->pc;
   reg_data[ARM64_REG_SP] = user->sp;
+  reg_data[ARM64_REG_PC] = user->pc;
+  reg_data[ARM64_REG_PSTATE] = user->pstate;
   return regs;
 }
 
@@ -124,12 +126,12 @@
   return regs;
 }
 
-bool RegsArm64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsArm64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsMips.cpp b/libunwindstack/RegsMips.cpp
index f330fe0..ebefe42 100644
--- a/libunwindstack/RegsMips.cpp
+++ b/libunwindstack/RegsMips.cpp
@@ -129,13 +129,13 @@
   return regs;
 }
 
-bool RegsMips::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsMips::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   uint64_t offset = 0;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsMips64.cpp b/libunwindstack/RegsMips64.cpp
index 3f67d92..be2fd22 100644
--- a/libunwindstack/RegsMips64.cpp
+++ b/libunwindstack/RegsMips64.cpp
@@ -127,12 +127,12 @@
   return regs;
 }
 
-bool RegsMips64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsMips64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->Read(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->Read(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsX86.cpp b/libunwindstack/RegsX86.cpp
index 9bb39d1..5538fc0 100644
--- a/libunwindstack/RegsX86.cpp
+++ b/libunwindstack/RegsX86.cpp
@@ -119,12 +119,12 @@
   return regs;
 }
 
-bool RegsX86::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsX86::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data))) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data))) {
     return false;
   }
 
diff --git a/libunwindstack/RegsX86_64.cpp b/libunwindstack/RegsX86_64.cpp
index 74cd1cb..5b9aa58 100644
--- a/libunwindstack/RegsX86_64.cpp
+++ b/libunwindstack/RegsX86_64.cpp
@@ -139,17 +139,17 @@
   return regs;
 }
 
-bool RegsX86_64::StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) {
+bool RegsX86_64::StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) {
   uint64_t data;
   Memory* elf_memory = elf->memory();
   // Read from elf memory since it is usually more expensive to read from
   // process memory.
-  if (!elf_memory->ReadFully(rel_pc, &data, sizeof(data)) || data != 0x0f0000000fc0c748) {
+  if (!elf_memory->ReadFully(elf_offset, &data, sizeof(data)) || data != 0x0f0000000fc0c748) {
     return false;
   }
 
   uint16_t data2;
-  if (!elf_memory->ReadFully(rel_pc + 8, &data2, sizeof(data2)) || data2 != 0x0f05) {
+  if (!elf_memory->ReadFully(elf_offset + 8, &data2, sizeof(data2)) || data2 != 0x0f05) {
     return false;
   }
 
diff --git a/libunwindstack/TEST_MAPPING b/libunwindstack/TEST_MAPPING
index 55771c0..909f897 100644
--- a/libunwindstack/TEST_MAPPING
+++ b/libunwindstack/TEST_MAPPING
@@ -2,6 +2,9 @@
   "presubmit": [
     {
       "name": "libunwindstack_unit_test"
+    },
+    {
+      "name": "CtsSimpleperfTestCases"
     }
   ]
 }
diff --git a/libunwindstack/Unwinder.cpp b/libunwindstack/Unwinder.cpp
index 0b9b85c..1bb0319 100644
--- a/libunwindstack/Unwinder.cpp
+++ b/libunwindstack/Unwinder.cpp
@@ -34,9 +34,7 @@
 #include <unwindstack/Memory.h>
 #include <unwindstack/Unwinder.h>
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
 #include <unwindstack/DexFiles.h>
-#endif
 
 // Use the demangler from libc++.
 extern "C" char* __cxa_demangle(const char*, char*, size_t*, int* status);
@@ -84,7 +82,7 @@
     return;
   }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
+#if defined(DEXFILE_SUPPORT)
   if (dex_files_ == nullptr) {
     return;
   }
@@ -367,12 +365,10 @@
   jit_debug_ = jit_debug;
 }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
 void Unwinder::SetDexFiles(DexFiles* dex_files, ArchEnum arch) {
   dex_files->SetArch(arch);
   dex_files_ = dex_files;
 }
-#endif
 
 bool UnwinderFromPid::Init(ArchEnum arch) {
   if (pid_ == getpid()) {
@@ -390,7 +386,7 @@
   jit_debug_ptr_.reset(new JitDebug(process_memory_));
   jit_debug_ = jit_debug_ptr_.get();
   SetJitDebug(jit_debug_, arch);
-#if !defined(NO_LIBDEXFILE_SUPPORT)
+#if defined(DEXFILE_SUPPORT)
   dex_files_ptr_.reset(new DexFiles(process_memory_));
   dex_files_ = dex_files_ptr_.get();
   SetDexFiles(dex_files_, arch);
diff --git a/libunwindstack/include/unwindstack/DwarfSection.h b/libunwindstack/include/unwindstack/DwarfSection.h
index 0b3f6d4..c244749 100644
--- a/libunwindstack/include/unwindstack/DwarfSection.h
+++ b/libunwindstack/include/unwindstack/DwarfSection.h
@@ -125,10 +125,16 @@
   DwarfSectionImpl(Memory* memory) : DwarfSection(memory) {}
   virtual ~DwarfSectionImpl() = default;
 
+  bool Init(uint64_t offset, uint64_t size, int64_t section_bias) override;
+
   const DwarfCie* GetCieFromOffset(uint64_t offset);
 
   const DwarfFde* GetFdeFromOffset(uint64_t offset);
 
+  const DwarfFde* GetFdeFromPc(uint64_t pc) override;
+
+  void GetFdes(std::vector<const DwarfFde*>* fdes) override;
+
   bool EvalRegister(const DwarfLocation* loc, uint32_t reg, AddressType* reg_ptr, void* info);
 
   bool Eval(const DwarfCie* cie, Memory* regular_memory, const dwarf_loc_regs_t& loc_regs,
@@ -139,6 +145,8 @@
   bool Log(uint8_t indent, uint64_t pc, const DwarfFde* fde) override;
 
  protected:
+  bool GetNextCieOrFde(const DwarfFde** fde_entry);
+
   bool FillInCieHeader(DwarfCie* cie);
 
   bool FillInCie(DwarfCie* cie);
@@ -150,43 +158,13 @@
   bool EvalExpression(const DwarfLocation& loc, Memory* regular_memory, AddressType* value,
                       RegsInfo<AddressType>* regs_info, bool* is_dex_pc);
 
+  void InsertFde(const DwarfFde* fde);
+
   int64_t section_bias_ = 0;
   uint64_t entries_offset_ = 0;
   uint64_t entries_end_ = 0;
-  uint64_t pc_offset_ = 0;
-};
-
-template <typename AddressType>
-class DwarfSectionImplNoHdr : public DwarfSectionImpl<AddressType> {
- public:
-  // Add these so that the protected members of DwarfSectionImpl
-  // can be accessed without needing a this->.
-  using DwarfSectionImpl<AddressType>::memory_;
-  using DwarfSectionImpl<AddressType>::pc_offset_;
-  using DwarfSectionImpl<AddressType>::entries_offset_;
-  using DwarfSectionImpl<AddressType>::entries_end_;
-  using DwarfSectionImpl<AddressType>::last_error_;
-  using DwarfSectionImpl<AddressType>::section_bias_;
-  using DwarfSectionImpl<AddressType>::cie_entries_;
-  using DwarfSectionImpl<AddressType>::fde_entries_;
-  using DwarfSectionImpl<AddressType>::cie32_value_;
-  using DwarfSectionImpl<AddressType>::cie64_value_;
-
-  DwarfSectionImplNoHdr(Memory* memory) : DwarfSectionImpl<AddressType>(memory) {}
-  virtual ~DwarfSectionImplNoHdr() = default;
-
-  bool Init(uint64_t offset, uint64_t size, int64_t section_bias) override;
-
-  const DwarfFde* GetFdeFromPc(uint64_t pc) override;
-
-  void GetFdes(std::vector<const DwarfFde*>* fdes) override;
-
- protected:
-  bool GetNextCieOrFde(DwarfFde** fde_entry);
-
-  void InsertFde(const DwarfFde* fde);
-
   uint64_t next_entries_offset_ = 0;
+  uint64_t pc_offset_ = 0;
 
   std::map<uint64_t, std::pair<uint64_t, const DwarfFde*>> fdes_;
 };
diff --git a/libunwindstack/include/unwindstack/Elf.h b/libunwindstack/include/unwindstack/Elf.h
index fc3f2a6..472ed92 100644
--- a/libunwindstack/include/unwindstack/Elf.h
+++ b/libunwindstack/include/unwindstack/Elf.h
@@ -63,7 +63,7 @@
 
   bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
 
-  bool GetGlobalVariable(const std::string& name, uint64_t* memory_address);
+  bool GetGlobalVariableOffset(const std::string& name, uint64_t* memory_offset);
 
   uint64_t GetRelPc(uint64_t pc, const MapInfo* map_info);
 
diff --git a/libunwindstack/include/unwindstack/ElfInterface.h b/libunwindstack/include/unwindstack/ElfInterface.h
index ae9bd9a..0c39b23 100644
--- a/libunwindstack/include/unwindstack/ElfInterface.h
+++ b/libunwindstack/include/unwindstack/ElfInterface.h
@@ -77,8 +77,11 @@
   void SetGnuDebugdataInterface(ElfInterface* interface) { gnu_debugdata_interface_ = interface; }
 
   uint64_t dynamic_offset() { return dynamic_offset_; }
-  uint64_t dynamic_vaddr() { return dynamic_vaddr_; }
-  uint64_t dynamic_size() { return dynamic_size_; }
+  uint64_t dynamic_vaddr_start() { return dynamic_vaddr_start_; }
+  uint64_t dynamic_vaddr_end() { return dynamic_vaddr_end_; }
+  uint64_t data_offset() { return data_offset_; }
+  uint64_t data_vaddr_start() { return data_vaddr_start_; }
+  uint64_t data_vaddr_end() { return data_vaddr_end_; }
   uint64_t eh_frame_hdr_offset() { return eh_frame_hdr_offset_; }
   int64_t eh_frame_hdr_section_bias() { return eh_frame_hdr_section_bias_; }
   uint64_t eh_frame_hdr_size() { return eh_frame_hdr_size_; }
@@ -141,8 +144,12 @@
 
   // Stored elf data.
   uint64_t dynamic_offset_ = 0;
-  uint64_t dynamic_vaddr_ = 0;
-  uint64_t dynamic_size_ = 0;
+  uint64_t dynamic_vaddr_start_ = 0;
+  uint64_t dynamic_vaddr_end_ = 0;
+
+  uint64_t data_offset_ = 0;
+  uint64_t data_vaddr_start_ = 0;
+  uint64_t data_vaddr_end_ = 0;
 
   uint64_t eh_frame_hdr_offset_ = 0;
   int64_t eh_frame_hdr_section_bias_ = 0;
diff --git a/libunwindstack/include/unwindstack/Global.h b/libunwindstack/include/unwindstack/Global.h
index a7e6c15..b9bb141 100644
--- a/libunwindstack/include/unwindstack/Global.h
+++ b/libunwindstack/include/unwindstack/Global.h
@@ -45,7 +45,7 @@
   ArchEnum arch() { return arch_; }
 
  protected:
-  uint64_t GetVariableOffset(MapInfo* info, const std::string& variable);
+  bool Searchable(const std::string& name);
   void FindAndReadVariable(Maps* maps, const char* variable);
 
   virtual bool ReadVariableData(uint64_t offset) = 0;
diff --git a/libunwindstack/include/unwindstack/MachineArm64.h b/libunwindstack/include/unwindstack/MachineArm64.h
index e8b778b..e953335 100644
--- a/libunwindstack/include/unwindstack/MachineArm64.h
+++ b/libunwindstack/include/unwindstack/MachineArm64.h
@@ -55,6 +55,7 @@
   ARM64_REG_R30,
   ARM64_REG_R31,
   ARM64_REG_PC,
+  ARM64_REG_PSTATE,
   ARM64_REG_LAST,
 
   ARM64_REG_SP = ARM64_REG_R31,
diff --git a/libunwindstack/include/unwindstack/MapInfo.h b/libunwindstack/include/unwindstack/MapInfo.h
index 8f0c516..052e79f 100644
--- a/libunwindstack/include/unwindstack/MapInfo.h
+++ b/libunwindstack/include/unwindstack/MapInfo.h
@@ -31,24 +31,26 @@
 class MemoryFileAtOffset;
 
 struct MapInfo {
-  MapInfo(MapInfo* map_info, uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
-          const char* name)
+  MapInfo(MapInfo* prev_map, MapInfo* prev_real_map, uint64_t start, uint64_t end, uint64_t offset,
+          uint64_t flags, const char* name)
       : start(start),
         end(end),
         offset(offset),
         flags(flags),
         name(name),
-        prev_map(map_info),
+        prev_map(prev_map),
+        prev_real_map(prev_real_map),
         load_bias(INT64_MAX),
         build_id(0) {}
-  MapInfo(MapInfo* map_info, uint64_t start, uint64_t end, uint64_t offset, uint64_t flags,
-          const std::string& name)
+  MapInfo(MapInfo* prev_map, MapInfo* prev_real_map, uint64_t start, uint64_t end, uint64_t offset,
+          uint64_t flags, const std::string& name)
       : start(start),
         end(end),
         offset(offset),
         flags(flags),
         name(name),
-        prev_map(map_info),
+        prev_map(prev_map),
+        prev_real_map(prev_real_map),
         load_bias(INT64_MAX),
         build_id(0) {}
   ~MapInfo();
@@ -71,6 +73,14 @@
   uint64_t elf_start_offset = 0;
 
   MapInfo* prev_map = nullptr;
+  // This is the previous map that is not empty with a 0 offset. For
+  // example, this set of maps:
+  //  1000-2000  r--p 000000 00:00 0 libc.so
+  //  2000-3000  ---p 000000 00:00 0 libc.so
+  //  3000-4000  r-xp 003000 00:00 0 libc.so
+  // The last map's prev_map would point to the 2000-3000 map, while the
+  // prev_real_map would point to the 1000-2000 map.
+  MapInfo* prev_real_map = nullptr;
 
   std::atomic_int64_t load_bias;
 
@@ -97,6 +107,8 @@
   // Returns the printable version of the build id (hex dump of raw data).
   std::string GetPrintableBuildID();
 
+  inline bool IsBlank() { return offset == 0 && flags == 0 && name.empty(); }
+
  private:
   MapInfo(const MapInfo&) = delete;
   void operator=(const MapInfo&) = delete;
diff --git a/libunwindstack/include/unwindstack/Regs.h b/libunwindstack/include/unwindstack/Regs.h
index 1c2a81c..4f761b4 100644
--- a/libunwindstack/include/unwindstack/Regs.h
+++ b/libunwindstack/include/unwindstack/Regs.h
@@ -66,7 +66,7 @@
 
   virtual uint64_t GetPcAdjustment(uint64_t rel_pc, Elf* elf) = 0;
 
-  virtual bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) = 0;
+  virtual bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) = 0;
 
   virtual bool SetPcFromReturnAddress(Memory* process_memory) = 0;
 
diff --git a/libunwindstack/include/unwindstack/RegsArm.h b/libunwindstack/include/unwindstack/RegsArm.h
index 44f6744..aa029be 100644
--- a/libunwindstack/include/unwindstack/RegsArm.h
+++ b/libunwindstack/include/unwindstack/RegsArm.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsArm64.h b/libunwindstack/include/unwindstack/RegsArm64.h
index a72f91f..5cd7e5b 100644
--- a/libunwindstack/include/unwindstack/RegsArm64.h
+++ b/libunwindstack/include/unwindstack/RegsArm64.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsMips.h b/libunwindstack/include/unwindstack/RegsMips.h
index c9dd202..8164a15 100644
--- a/libunwindstack/include/unwindstack/RegsMips.h
+++ b/libunwindstack/include/unwindstack/RegsMips.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsMips64.h b/libunwindstack/include/unwindstack/RegsMips64.h
index 7c42812..c982542 100644
--- a/libunwindstack/include/unwindstack/RegsMips64.h
+++ b/libunwindstack/include/unwindstack/RegsMips64.h
@@ -40,7 +40,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void IterateRegisters(std::function<void(const char*, uint64_t)>) override final;
 
diff --git a/libunwindstack/include/unwindstack/RegsX86.h b/libunwindstack/include/unwindstack/RegsX86.h
index d19e449..2323a4f 100644
--- a/libunwindstack/include/unwindstack/RegsX86.h
+++ b/libunwindstack/include/unwindstack/RegsX86.h
@@ -41,7 +41,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void SetFromUcontext(x86_ucontext_t* ucontext);
 
diff --git a/libunwindstack/include/unwindstack/RegsX86_64.h b/libunwindstack/include/unwindstack/RegsX86_64.h
index dc9a220..3e919a4 100644
--- a/libunwindstack/include/unwindstack/RegsX86_64.h
+++ b/libunwindstack/include/unwindstack/RegsX86_64.h
@@ -41,7 +41,7 @@
 
   bool SetPcFromReturnAddress(Memory* process_memory) override;
 
-  bool StepIfSignalHandler(uint64_t rel_pc, Elf* elf, Memory* process_memory) override;
+  bool StepIfSignalHandler(uint64_t elf_offset, Elf* elf, Memory* process_memory) override;
 
   void SetFromUcontext(x86_64_ucontext_t* ucontext);
 
diff --git a/libunwindstack/include/unwindstack/Unwinder.h b/libunwindstack/include/unwindstack/Unwinder.h
index 11ad9de..67762c0 100644
--- a/libunwindstack/include/unwindstack/Unwinder.h
+++ b/libunwindstack/include/unwindstack/Unwinder.h
@@ -107,9 +107,7 @@
 
   void SetDisplayBuildID(bool display_build_id) { display_build_id_ = display_build_id; }
 
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   void SetDexFiles(DexFiles* dex_files, ArchEnum arch);
-#endif
 
   bool elf_from_memory_not_file() { return elf_from_memory_not_file_; }
 
@@ -128,9 +126,7 @@
   std::vector<FrameData> frames_;
   std::shared_ptr<Memory> process_memory_;
   JitDebug* jit_debug_ = nullptr;
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   DexFiles* dex_files_ = nullptr;
-#endif
   bool resolve_names_ = true;
   bool embedded_soname_ = true;
   bool display_build_id_ = false;
@@ -151,9 +147,7 @@
   pid_t pid_;
   std::unique_ptr<Maps> maps_ptr_;
   std::unique_ptr<JitDebug> jit_debug_ptr_;
-#if !defined(NO_LIBDEXFILE_SUPPORT)
   std::unique_ptr<DexFiles> dex_files_ptr_;
-#endif
 };
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ArmExidxDecodeTest.cpp b/libunwindstack/tests/ArmExidxDecodeTest.cpp
index 7b1dd92..69a7816 100644
--- a/libunwindstack/tests/ArmExidxDecodeTest.cpp
+++ b/libunwindstack/tests/ArmExidxDecodeTest.cpp
@@ -1662,7 +1662,7 @@
   ASSERT_EQ(0x10U, (*exidx_->regs())[15]);
 }
 
-INSTANTIATE_TEST_SUITE_P(, ArmExidxDecodeTest,
+INSTANTIATE_TEST_SUITE_P(Unwindstack, ArmExidxDecodeTest,
                          ::testing::Values("logging", "register_logging", "no_logging"));
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DexFileTest.cpp b/libunwindstack/tests/DexFileTest.cpp
index 0149a42..1b54da6 100644
--- a/libunwindstack/tests/DexFileTest.cpp
+++ b/libunwindstack/tests/DexFileTest.cpp
@@ -105,7 +105,7 @@
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));
 
   MemoryFake memory;
-  MapInfo info(nullptr, 0, 0x10000, 0, 0x5, tf.path);
+  MapInfo info(nullptr, nullptr, 0, 0x10000, 0, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x500, &memory, &info) != nullptr);
 }
 
@@ -118,7 +118,7 @@
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));
 
   MemoryFake memory;
-  MapInfo info(nullptr, 0x100, 0x10000, 0, 0x5, tf.path);
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x600, &memory, &info) != nullptr);
 }
 
@@ -131,21 +131,21 @@
             static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));
 
   MemoryFake memory;
-  MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, tf.path);
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, tf.path);
   EXPECT_TRUE(DexFile::Create(0x400, &memory, &info) != nullptr);
 }
 
 TEST(DexFileTest, create_using_memory_empty_file) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
-  MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "");
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
 }
 
 TEST(DexFileTest, create_using_memory_file_does_not_exist) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
-  MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "/does/not/exist");
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "/does/not/exist");
   EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
 }
 
@@ -158,7 +158,7 @@
 
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
-  MapInfo info(nullptr, 0x4000, 0x10000, 0x200, 0x5, "/does/not/exist");
+  MapInfo info(nullptr, nullptr, 0x4000, 0x10000, 0x200, 0x5, "/does/not/exist");
   std::unique_ptr<DexFile> dex_file = DexFile::Create(0x4000, &memory, &info);
   ASSERT_TRUE(dex_file != nullptr);
 
@@ -171,7 +171,7 @@
 TEST(DexFileTest, get_method) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
-  MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "");
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
   ASSERT_TRUE(dex_file != nullptr);
 
@@ -189,7 +189,7 @@
 TEST(DexFileTest, get_method_empty) {
   MemoryFake memory;
   memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
-  MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "");
+  MapInfo info(nullptr, nullptr, 0x100, 0x10000, 0x200, 0x5, "");
   std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
   ASSERT_TRUE(dex_file != nullptr);
 
diff --git a/libunwindstack/tests/DexFilesTest.cpp b/libunwindstack/tests/DexFilesTest.cpp
index 1ea9e5c..477cf8e 100644
--- a/libunwindstack/tests/DexFilesTest.cpp
+++ b/libunwindstack/tests/DexFilesTest.cpp
@@ -36,14 +36,18 @@
 
 class DexFilesTest : public ::testing::Test {
  protected:
-  void CreateFakeElf(MapInfo* map_info) {
+  void CreateFakeElf(MapInfo* map_info, uint64_t global_offset, uint64_t data_offset,
+                     uint64_t data_vaddr, uint64_t data_size) {
     MemoryFake* memory = new MemoryFake;
     ElfFake* elf = new ElfFake(memory);
     elf->FakeSetValid(true);
     ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
     elf->FakeSetInterface(interface);
 
-    interface->FakeSetGlobalVariable("__dex_debug_descriptor", 0x800);
+    interface->FakeSetGlobalVariable("__dex_debug_descriptor", global_offset);
+    interface->FakeSetDataOffset(data_offset);
+    interface->FakeSetDataVaddrStart(data_vaddr);
+    interface->FakeSetDataVaddrEnd(data_vaddr + data_size);
     map_info->elf.reset(elf);
   }
 
@@ -54,29 +58,38 @@
     maps_.reset(
         new BufferMaps("1000-4000 ---s 00000000 00:00 0 /fake/elf\n"
                        "4000-6000 r--s 00000000 00:00 0 /fake/elf\n"
-                       "6000-8000 -wxs 00000000 00:00 0 /fake/elf\n"
+                       "6000-8000 -wxs 00002000 00:00 0 /fake/elf\n"
                        "a000-c000 r--p 00000000 00:00 0 /fake/elf2\n"
-                       "c000-f000 rw-p 00001000 00:00 0 /fake/elf2\n"
+                       "c000-f000 rw-p 00002000 00:00 0 /fake/elf2\n"
                        "f000-11000 r--p 00000000 00:00 0 /fake/elf3\n"
-                       "100000-110000 rw-p 0001000 00:00 0 /fake/elf3\n"
+                       "100000-110000 rw-p 00f1000 00:00 0 /fake/elf3\n"
                        "200000-210000 rw-p 0002000 00:00 0 /fake/elf3\n"
-                       "300000-400000 rw-p 0003000 00:00 0 /fake/elf3\n"));
+                       "300000-400000 rw-p 0003000 00:00 0 /fake/elf3\n"
+                       "500000-501000 r--p 0000000 00:00 0 /fake/elf4\n"
+                       "501000-502000 ---p 0000000 00:00 0\n"
+                       "503000-510000 rw-p 0003000 00:00 0 /fake/elf4\n"
+                       "510000-520000 rw-p 0010000 00:00 0 /fake/elf4\n"));
     ASSERT_TRUE(maps_->Parse());
 
     // Global variable in a section that is not readable.
     MapInfo* map_info = maps_->Get(kMapGlobalNonReadable);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     // Global variable not set by default.
     map_info = maps_->Get(kMapGlobalSetToZero);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     // Global variable set in this map.
     map_info = maps_->Get(kMapGlobal);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0xf1800, 0xf1000, 0xf1000, 0x10000);
+
+    // Global variable set in this map, but there is an empty map before rw map.
+    map_info = maps_->Get(kMapGlobalAfterEmpty);
+    ASSERT_TRUE(map_info != nullptr);
+    CreateFakeElf(map_info, 0x3800, 0x3000, 0x3000, 0xd000);
   }
 
   void SetUp() override {
@@ -98,6 +111,8 @@
   static constexpr size_t kMapGlobalRw = 6;
   static constexpr size_t kMapDexFileEntries = 7;
   static constexpr size_t kMapDexFiles = 8;
+  static constexpr size_t kMapGlobalAfterEmpty = 9;
+  static constexpr size_t kMapDexFilesAfterEmpty = 12;
 
   std::shared_ptr<Memory> process_memory_;
   MemoryFake* memory_;
@@ -156,7 +171,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -172,7 +187,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x301000);
   WriteDex(0x301000);
 
@@ -186,7 +201,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0x200100, 0, 0x100000);
   WriteEntry32(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -203,7 +218,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0x200100, 0, 0x100000);
   WriteEntry64(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -218,7 +233,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -238,7 +253,7 @@
   uint64_t method_offset = 0x124;
   MapInfo* info = maps_->Get(kMapDexFiles);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0x200100, 0, 0x100000);
   WriteEntry32(0x200100, 0, 0x200000, 0x300000);
   WriteDex(0x300000);
@@ -274,9 +289,9 @@
   MapInfo* info = maps_->Get(kMapDexFiles);
 
   // First global variable found, but value is zero.
-  WriteDescriptor32(0xa800, 0);
+  WriteDescriptor32(0xc800, 0);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x100800, 0x200000);
   WriteEntry32(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -289,7 +304,7 @@
   dex_files_->SetArch(ARCH_ARM);
   method_name = "fail";
   method_offset = 0x123;
-  WriteDescriptor32(0xa800, 0x100000);
+  WriteDescriptor32(0xc800, 0x100000);
   dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
   EXPECT_EQ("fail", method_name);
   EXPECT_EQ(0x123U, method_offset);
@@ -303,9 +318,9 @@
   MapInfo* info = maps_->Get(kMapDexFiles);
 
   // First global variable found, but value is zero.
-  WriteDescriptor64(0xa800, 0);
+  WriteDescriptor64(0xc800, 0);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x100800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x300000);
   WriteDex(0x300000);
 
@@ -318,10 +333,24 @@
   dex_files_->SetArch(ARCH_ARM64);
   method_name = "fail";
   method_offset = 0x123;
-  WriteDescriptor64(0xa800, 0x100000);
+  WriteDescriptor64(0xc800, 0x100000);
   dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
   EXPECT_EQ("fail", method_name);
   EXPECT_EQ(0x123U, method_offset);
 }
 
+TEST_F(DexFilesTest, get_method_information_with_empty_map) {
+  std::string method_name = "nothing";
+  uint64_t method_offset = 0x124;
+  MapInfo* info = maps_->Get(kMapDexFilesAfterEmpty);
+
+  WriteDescriptor32(0x503800, 0x506000);
+  WriteEntry32(0x506000, 0, 0, 0x510000);
+  WriteDex(0x510000);
+
+  dex_files_->GetMethodInformation(maps_.get(), info, 0x510100, &method_name, &method_offset);
+  EXPECT_EQ("Main.<init>", method_name);
+  EXPECT_EQ(0U, method_offset);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfCfaLogTest.cpp b/libunwindstack/tests/DwarfCfaLogTest.cpp
index 9dd0cdd..def4088 100644
--- a/libunwindstack/tests/DwarfCfaLogTest.cpp
+++ b/libunwindstack/tests/DwarfCfaLogTest.cpp
@@ -774,6 +774,6 @@
                             cfa_gnu_negative_offset_extended, cfa_register_override);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfCfaLogTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfCfaLogTest, DwarfCfaLogTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfCfaLogTest, DwarfCfaLogTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfCfaTest.cpp b/libunwindstack/tests/DwarfCfaTest.cpp
index dd71490..9c6ab05 100644
--- a/libunwindstack/tests/DwarfCfaTest.cpp
+++ b/libunwindstack/tests/DwarfCfaTest.cpp
@@ -963,6 +963,6 @@
                             cfa_register_override);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfCfaTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfCfaTest, DwarfCfaTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfCfaTest, DwarfCfaTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfDebugFrameTest.cpp b/libunwindstack/tests/DwarfDebugFrameTest.cpp
index 2b36f17..b6f574a 100644
--- a/libunwindstack/tests/DwarfDebugFrameTest.cpp
+++ b/libunwindstack/tests/DwarfDebugFrameTest.cpp
@@ -825,6 +825,6 @@
     GetFdeFromOffset64_lsda_address, GetFdeFromPc_interleaved);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfDebugFrameTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfDebugFrameTest, DwarfDebugFrameTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfDebugFrameTest, DwarfDebugFrameTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfEhFrameTest.cpp b/libunwindstack/tests/DwarfEhFrameTest.cpp
index 4792fb5..46a25a4 100644
--- a/libunwindstack/tests/DwarfEhFrameTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameTest.cpp
@@ -128,6 +128,6 @@
 REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameTest, GetFdeCieFromOffset32, GetFdeCieFromOffset64);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfEhFrameTest, DwarfEhFrameTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfEhFrameTest, DwarfEhFrameTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
index 78608e3..6aa3867 100644
--- a/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameWithHdrTest.cpp
@@ -36,10 +36,8 @@
   ~TestDwarfEhFrameWithHdr() = default;
 
   void TestSetTableEncoding(uint8_t encoding) { this->table_encoding_ = encoding; }
-  void TestSetEntriesOffset(uint64_t offset) { this->entries_offset_ = offset; }
-  void TestSetEntriesEnd(uint64_t end) { this->entries_end_ = end; }
-  void TestSetEntriesDataOffset(uint64_t offset) { this->entries_data_offset_ = offset; }
-  void TestSetCurEntriesOffset(uint64_t offset) { this->cur_entries_offset_ = offset; }
+  void TestSetHdrEntriesOffset(uint64_t offset) { this->hdr_entries_offset_ = offset; }
+  void TestSetHdrEntriesDataOffset(uint64_t offset) { this->hdr_entries_data_offset_ = offset; }
   void TestSetTableEntrySize(size_t size) { this->table_entry_size_ = size; }
 
   void TestSetFdeCount(uint64_t count) { this->fde_count_ = count; }
@@ -48,15 +46,11 @@
   }
 
   uint8_t TestGetVersion() { return this->version_; }
-  uint8_t TestGetPtrEncoding() { return this->ptr_encoding_; }
-  uint64_t TestGetPtrOffset() { return this->ptr_offset_; }
   uint8_t TestGetTableEncoding() { return this->table_encoding_; }
   uint64_t TestGetTableEntrySize() { return this->table_entry_size_; }
   uint64_t TestGetFdeCount() { return this->fde_count_; }
-  uint64_t TestGetEntriesOffset() { return this->entries_offset_; }
-  uint64_t TestGetEntriesEnd() { return this->entries_end_; }
-  uint64_t TestGetEntriesDataOffset() { return this->entries_data_offset_; }
-  uint64_t TestGetCurEntriesOffset() { return this->cur_entries_offset_; }
+  uint64_t TestGetHdrEntriesOffset() { return this->hdr_entries_offset_; }
+  uint64_t TestGetHdrEntriesDataOffset() { return this->hdr_entries_data_offset_; }
 };
 
 template <typename TypeParam>
@@ -85,15 +79,11 @@
 
   ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
   EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
-  EXPECT_EQ(DW_EH_PE_udata2, this->eh_frame_->TestGetPtrEncoding());
   EXPECT_EQ(DW_EH_PE_sdata4, this->eh_frame_->TestGetTableEncoding());
   EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
   EXPECT_EQ(126U, this->eh_frame_->TestGetFdeCount());
-  EXPECT_EQ(0x500U, this->eh_frame_->TestGetPtrOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetEntriesOffset());
-  EXPECT_EQ(0x1100U, this->eh_frame_->TestGetEntriesEnd());
-  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetEntriesDataOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetCurEntriesOffset());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
 
   // Verify a zero table entry size fails to init.
   this->memory_.SetData8(0x1003, 0x1);
@@ -137,17 +127,14 @@
   this->memory_.SetData32(0x140c, 0x200);
   this->memory_.SetData16(0x1410, 0);
 
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x200, 0x2000));
   ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0x2000));
   EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
-  EXPECT_EQ(DW_EH_PE_udata2, this->eh_frame_->TestGetPtrEncoding());
   EXPECT_EQ(0x1b, this->eh_frame_->TestGetTableEncoding());
   EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
   EXPECT_EQ(1U, this->eh_frame_->TestGetFdeCount());
-  EXPECT_EQ(0x500U, this->eh_frame_->TestGetPtrOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetEntriesOffset());
-  EXPECT_EQ(0x1100U, this->eh_frame_->TestGetEntriesEnd());
-  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetEntriesDataOffset());
-  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetCurEntriesOffset());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
 
   const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
   ASSERT_TRUE(fde != nullptr);
@@ -155,6 +142,115 @@
   EXPECT_EQ(0x4700U, fde->pc_end);
 }
 
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, Init_non_zero_load_bias_different_from_eh_frame_bias) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x20f8);
+  this->memory_.SetData32(0x140c, 0x200);
+  this->memory_.SetData16(0x1410, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x200, 0x1000));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0x2000));
+  EXPECT_EQ(1U, this->eh_frame_->TestGetVersion());
+  EXPECT_EQ(0x1b, this->eh_frame_->TestGetTableEncoding());
+  EXPECT_EQ(4U, this->eh_frame_->TestGetTableEntrySize());
+  EXPECT_EQ(1U, this->eh_frame_->TestGetFdeCount());
+  EXPECT_EQ(0x100aU, this->eh_frame_->TestGetHdrEntriesOffset());
+  EXPECT_EQ(0x1000U, this->eh_frame_->TestGetHdrEntriesDataOffset());
+
+  const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x4500U, fde->pc_start);
+  EXPECT_EQ(0x4700U, fde->pc_end);
+}
+
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeFromPc_wtih_empty_fde) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x30f8);
+  this->memory_.SetData32(0x140c, 0);
+  this->memory_.SetData16(0x1410, 0);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1500, 0xfc);
+  this->memory_.SetData32(0x1504, 0x204);
+  this->memory_.SetData32(0x1508, 0x2ff8);
+  this->memory_.SetData32(0x150c, 0x200);
+  this->memory_.SetData16(0x1510, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x300, 0));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
+
+  const DwarfFde* fde = this->eh_frame_->GetFdeFromPc(0x4600);
+  ASSERT_TRUE(fde != nullptr);
+  EXPECT_EQ(0x4500U, fde->pc_start);
+  EXPECT_EQ(0x4700U, fde->pc_end);
+}
+
+TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdes_with_empty_fde) {
+  this->memory_.SetMemory(0x1000, std::vector<uint8_t>{0x1, DW_EH_PE_udata2, DW_EH_PE_udata4,
+                                                       DW_EH_PE_pcrel | DW_EH_PE_sdata4});
+  this->memory_.SetData16(0x1004, 0x500);
+  this->memory_.SetData32(0x1006, 1);
+  this->memory_.SetData32(0x100a, 0x2500);
+  this->memory_.SetData32(0x100e, 0x1400);
+
+  // CIE 32 information.
+  this->memory_.SetData32(0x1300, 0xfc);
+  this->memory_.SetData32(0x1304, 0);
+  this->memory_.SetMemory(0x1308, std::vector<uint8_t>{1, 'z', 'R', '\0', 0, 0, 0, 0, 0x1b});
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1400, 0xfc);
+  this->memory_.SetData32(0x1404, 0x104);
+  this->memory_.SetData32(0x1408, 0x30f8);
+  this->memory_.SetData32(0x140c, 0);
+  this->memory_.SetData16(0x1410, 0);
+
+  // FDE 32 information.
+  this->memory_.SetData32(0x1500, 0xfc);
+  this->memory_.SetData32(0x1504, 0x204);
+  this->memory_.SetData32(0x1508, 0x2ff8);
+  this->memory_.SetData32(0x150c, 0x200);
+  this->memory_.SetData16(0x1510, 0);
+
+  ASSERT_TRUE(this->eh_frame_->EhFrameInit(0x1300, 0x300, 0));
+  ASSERT_TRUE(this->eh_frame_->Init(0x1000, 0x100, 0));
+
+  std::vector<const DwarfFde*> fdes;
+  this->eh_frame_->GetFdes(&fdes);
+  ASSERT_FALSE(fdes.empty());
+  ASSERT_EQ(1U, fdes.size());
+  EXPECT_EQ(0x4500U, fdes[0]->pc_start);
+  EXPECT_EQ(0x4700U, fdes[0]->pc_end);
+}
+
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdes) {
   this->memory_.SetMemory(
       0x1000, std::vector<uint8_t>{1, DW_EH_PE_udata2, DW_EH_PE_udata4, DW_EH_PE_sdata4});
@@ -220,7 +316,7 @@
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_expect_cache_fail) {
   this->eh_frame_->TestSetTableEntrySize(0x10);
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
 
   ASSERT_TRUE(this->eh_frame_->GetFdeInfoFromIndex(0) == nullptr);
   ASSERT_EQ(DWARF_ERROR_MEMORY_INVALID, this->eh_frame_->LastErrorCode());
@@ -233,8 +329,8 @@
 // We are assuming that pc rel, is really relative to the load_bias.
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_read_pcrel) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_pcrel | DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
-  this->eh_frame_->TestSetEntriesDataOffset(0x3000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesDataOffset(0x3000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -248,8 +344,8 @@
 
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_read_datarel) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_datarel | DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
-  this->eh_frame_->TestSetEntriesDataOffset(0x3000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesDataOffset(0x3000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -263,7 +359,7 @@
 
 TYPED_TEST_P(DwarfEhFrameWithHdrTest, GetFdeInfoFromIndex_cached) {
   this->eh_frame_->TestSetTableEncoding(DW_EH_PE_udata4);
-  this->eh_frame_->TestSetEntriesOffset(0x1000);
+  this->eh_frame_->TestSetHdrEntriesOffset(0x1000);
   this->eh_frame_->TestSetTableEntrySize(0x10);
 
   this->memory_.SetData32(0x1040, 0x340);
@@ -446,7 +542,9 @@
   ASSERT_EQ(nullptr, this->eh_frame_->GetFdeFromPc(0x800));
 }
 
-REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameWithHdrTest, Init, Init_non_zero_load_bias, GetFdes,
+REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameWithHdrTest, Init, Init_non_zero_load_bias,
+                            Init_non_zero_load_bias_different_from_eh_frame_bias,
+                            GetFdeFromPc_wtih_empty_fde, GetFdes_with_empty_fde, GetFdes,
                             GetFdeInfoFromIndex_expect_cache_fail, GetFdeInfoFromIndex_read_pcrel,
                             GetFdeInfoFromIndex_read_datarel, GetFdeInfoFromIndex_cached,
                             GetFdeOffsetFromPc_verify, GetFdeOffsetFromPc_index_fail,
@@ -454,6 +552,6 @@
                             GetCieFde32, GetCieFde64, GetFdeFromPc_fde_not_found);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameWithHdrTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfEhFrameWithHdrTest, DwarfEhFrameWithHdrTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfEhFrameWithHdrTest, DwarfEhFrameWithHdrTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfOpLogTest.cpp b/libunwindstack/tests/DwarfOpLogTest.cpp
index f4ade5d..8dbf6e8 100644
--- a/libunwindstack/tests/DwarfOpLogTest.cpp
+++ b/libunwindstack/tests/DwarfOpLogTest.cpp
@@ -68,6 +68,6 @@
 REGISTER_TYPED_TEST_SUITE_P(DwarfOpLogTest, multiple_ops);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfOpLogTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfOpLogTest, DwarfOpLogTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfOpLogTest, DwarfOpLogTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfOpTest.cpp b/libunwindstack/tests/DwarfOpTest.cpp
index 0898ec0..0e2d91a 100644
--- a/libunwindstack/tests/DwarfOpTest.cpp
+++ b/libunwindstack/tests/DwarfOpTest.cpp
@@ -1581,6 +1581,6 @@
                             is_dex_pc);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfOpTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfOpTest, DwarfOpTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfOpTest, DwarfOpTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfSectionImplTest.cpp b/libunwindstack/tests/DwarfSectionImplTest.cpp
index a9d6dad..cac59b7 100644
--- a/libunwindstack/tests/DwarfSectionImplTest.cpp
+++ b/libunwindstack/tests/DwarfSectionImplTest.cpp
@@ -583,6 +583,6 @@
                             GetCfaLocationInfo_cie_not_cached, GetCfaLocationInfo_cie_cached, Log);
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfSectionImplTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, DwarfSectionImplTest, DwarfSectionImplTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfSectionImplTest, DwarfSectionImplTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfCacheTest.cpp b/libunwindstack/tests/ElfCacheTest.cpp
index 5735858..5f13546 100644
--- a/libunwindstack/tests/ElfCacheTest.cpp
+++ b/libunwindstack/tests/ElfCacheTest.cpp
@@ -78,8 +78,8 @@
 
   uint64_t start = 0x1000;
   uint64_t end = 0x20000;
-  MapInfo info1(nullptr, start, end, 0, 0x5, tf.path);
-  MapInfo info2(nullptr, start, end, 0, 0x5, tf.path);
+  MapInfo info1(nullptr, nullptr, start, end, 0, 0x5, tf.path);
+  MapInfo info2(nullptr, nullptr, start, end, 0, 0x5, tf.path);
 
   Elf* elf1 = info1.GetElf(memory_, ARCH_ARM);
   ASSERT_TRUE(elf1->valid());
@@ -119,17 +119,17 @@
   uint64_t start = 0x1000;
   uint64_t end = 0x20000;
   // Will have an elf at offset 0 in file.
-  MapInfo info0_1(nullptr, start, end, 0, 0x5, tf.path);
-  MapInfo info0_2(nullptr, start, end, 0, 0x5, tf.path);
+  MapInfo info0_1(nullptr, nullptr, start, end, 0, 0x5, tf.path);
+  MapInfo info0_2(nullptr, nullptr, start, end, 0, 0x5, tf.path);
   // Will have an elf at offset 0x100 in file.
-  MapInfo info100_1(nullptr, start, end, 0x100, 0x5, tf.path);
-  MapInfo info100_2(nullptr, start, end, 0x100, 0x5, tf.path);
+  MapInfo info100_1(nullptr, nullptr, start, end, 0x100, 0x5, tf.path);
+  MapInfo info100_2(nullptr, nullptr, start, end, 0x100, 0x5, tf.path);
   // Will have an elf at offset 0x200 in file.
-  MapInfo info200_1(nullptr, start, end, 0x200, 0x5, tf.path);
-  MapInfo info200_2(nullptr, start, end, 0x200, 0x5, tf.path);
+  MapInfo info200_1(nullptr, nullptr, start, end, 0x200, 0x5, tf.path);
+  MapInfo info200_2(nullptr, nullptr, start, end, 0x200, 0x5, tf.path);
   // Will have an elf at offset 0 in file.
-  MapInfo info300_1(nullptr, start, end, 0x300, 0x5, tf.path);
-  MapInfo info300_2(nullptr, start, end, 0x300, 0x5, tf.path);
+  MapInfo info300_1(nullptr, nullptr, start, end, 0x300, 0x5, tf.path);
+  MapInfo info300_2(nullptr, nullptr, start, end, 0x300, 0x5, tf.path);
 
   Elf* elf0_1 = info0_1.GetElf(memory_, ARCH_ARM);
   ASSERT_TRUE(elf0_1->valid());
@@ -216,10 +216,10 @@
   uint64_t start = 0x1000;
   uint64_t end = 0x20000;
   // Multiple info sections at different offsets will have non-zero elf offsets.
-  MapInfo info300_1(nullptr, start, end, 0x300, 0x5, tf.path);
-  MapInfo info300_2(nullptr, start, end, 0x300, 0x5, tf.path);
-  MapInfo info400_1(nullptr, start, end, 0x400, 0x5, tf.path);
-  MapInfo info400_2(nullptr, start, end, 0x400, 0x5, tf.path);
+  MapInfo info300_1(nullptr, nullptr, start, end, 0x300, 0x5, tf.path);
+  MapInfo info300_2(nullptr, nullptr, start, end, 0x300, 0x5, tf.path);
+  MapInfo info400_1(nullptr, nullptr, start, end, 0x400, 0x5, tf.path);
+  MapInfo info400_2(nullptr, nullptr, start, end, 0x400, 0x5, tf.path);
 
   Elf* elf300_1 = info300_1.GetElf(memory_, ARCH_ARM);
   ASSERT_TRUE(elf300_1->valid());
diff --git a/libunwindstack/tests/ElfFake.h b/libunwindstack/tests/ElfFake.h
index 832e64a..fc90dab 100644
--- a/libunwindstack/tests/ElfFake.h
+++ b/libunwindstack/tests/ElfFake.h
@@ -97,6 +97,17 @@
 
   void FakeSetErrorAddress(uint64_t address) { last_error_.address = address; }
 
+  void FakeSetDataOffset(uint64_t offset) { data_offset_ = offset; }
+  void FakeSetDataVaddrStart(uint64_t vaddr) { data_vaddr_start_ = vaddr; }
+  void FakeSetDataVaddrEnd(uint64_t vaddr) { data_vaddr_end_ = vaddr; }
+
+  void FakeSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
+  void FakeSetDynamicVaddrStart(uint64_t vaddr) { dynamic_vaddr_start_ = vaddr; }
+  void FakeSetDynamicVaddrEnd(uint64_t vaddr) { dynamic_vaddr_end_ = vaddr; }
+
+  void FakeSetGnuDebugdataOffset(uint64_t offset) { gnu_debugdata_offset_ = offset; }
+  void FakeSetGnuDebugdataSize(uint64_t size) { gnu_debugdata_size_ = size; }
+
  private:
   std::unordered_map<std::string, uint64_t> globals_;
   std::string fake_build_id_;
diff --git a/libunwindstack/tests/ElfInterfaceTest.cpp b/libunwindstack/tests/ElfInterfaceTest.cpp
index b048b17..3cf90fe 100644
--- a/libunwindstack/tests/ElfInterfaceTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceTest.cpp
@@ -1310,7 +1310,7 @@
 
   memset(&phdr, 0, sizeof(phdr));
   phdr.p_type = PT_GNU_EH_FRAME;
-  phdr.p_paddr = addr;
+  phdr.p_vaddr = addr;
   phdr.p_offset = offset;
   memory_.SetMemory(phdr_offset, &phdr, sizeof(phdr));
 
@@ -1944,4 +1944,23 @@
   CheckLoadBiasInFirstExecPhdr<Elf64_Ehdr, Elf64_Phdr, ElfInterface64>(0x5000, 0x1000, -0x4000);
 }
 
+TEST_F(ElfInterfaceTest, huge_gnu_debugdata_size) {
+  ElfInterfaceFake interface(nullptr);
+
+  interface.FakeSetGnuDebugdataOffset(0x1000);
+  interface.FakeSetGnuDebugdataSize(0xffffffffffffffffUL);
+  ASSERT_TRUE(interface.CreateGnuDebugdataMemory() == nullptr);
+
+  interface.FakeSetGnuDebugdataSize(0x4000000000000UL);
+  ASSERT_TRUE(interface.CreateGnuDebugdataMemory() == nullptr);
+
+  // This should exceed the size_t value of the first allocation.
+#if defined(__LP64__)
+  interface.FakeSetGnuDebugdataSize(0x3333333333333334ULL);
+#else
+  interface.FakeSetGnuDebugdataSize(0x33333334);
+#endif
+  ASSERT_TRUE(interface.CreateGnuDebugdataMemory() == nullptr);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfTest.cpp b/libunwindstack/tests/ElfTest.cpp
index e6728a0..1f3ed81 100644
--- a/libunwindstack/tests/ElfTest.cpp
+++ b/libunwindstack/tests/ElfTest.cpp
@@ -104,6 +104,8 @@
     memory_->SetMemory(0x100, &phdr, sizeof(phdr));
   }
 
+  void VerifyStepIfSignalHandler(uint64_t load_bias);
+
   MemoryFake* memory_;
 };
 
@@ -273,7 +275,7 @@
   elf.FakeSetInterface(interface);
 
   elf.FakeSetValid(true);
-  MapInfo map_info(nullptr, 0x1000, 0x2000, 0, 0, "");
+  MapInfo map_info(nullptr, nullptr, 0x1000, 0x2000, 0, 0, "");
 
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 
@@ -281,7 +283,7 @@
   ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
 }
 
-TEST_F(ElfTest, step_in_signal_map) {
+void ElfTest::VerifyStepIfSignalHandler(uint64_t load_bias) {
   ElfFake elf(memory_);
 
   RegsArm regs;
@@ -290,6 +292,7 @@
 
   ElfInterfaceFake* interface = new ElfInterfaceFake(memory_);
   elf.FakeSetInterface(interface);
+  elf.FakeSetLoadBias(load_bias);
 
   memory_->SetData32(0x3000, 0xdf0027ad);
   MemoryFake process_memory;
@@ -299,12 +302,20 @@
   }
 
   elf.FakeSetValid(true);
-  ASSERT_TRUE(elf.StepIfSignalHandler(0x3000, &regs, &process_memory));
+  ASSERT_TRUE(elf.StepIfSignalHandler(0x3000 + load_bias, &regs, &process_memory));
   EXPECT_EQ(ERROR_NONE, elf.GetLastErrorCode());
   EXPECT_EQ(15U, regs.pc());
   EXPECT_EQ(13U, regs.sp());
 }
 
+TEST_F(ElfTest, step_in_signal_map) {
+  VerifyStepIfSignalHandler(0);
+}
+
+TEST_F(ElfTest, step_in_signal_map_non_zero_load_bias) {
+  VerifyStepIfSignalHandler(0x1000);
+}
+
 class ElfInterfaceMock : public ElfInterface {
  public:
   ElfInterfaceMock(Memory* memory) : ElfInterface(memory) {}
@@ -320,9 +331,13 @@
   MOCK_METHOD(bool, GetGlobalVariable, (const std::string&, uint64_t*), (override));
   MOCK_METHOD(bool, IsValidPc, (uint64_t), (override));
 
+  void MockSetDataOffset(uint64_t offset) { data_offset_ = offset; }
+  void MockSetDataVaddrStart(uint64_t vaddr) { data_vaddr_start_ = vaddr; }
+  void MockSetDataVaddrEnd(uint64_t vaddr) { data_vaddr_end_ = vaddr; }
+
   void MockSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
-  void MockSetDynamicVaddr(uint64_t vaddr) { dynamic_vaddr_ = vaddr; }
-  void MockSetDynamicSize(uint64_t size) { dynamic_size_ = size; }
+  void MockSetDynamicVaddrStart(uint64_t vaddr) { dynamic_vaddr_start_ = vaddr; }
+  void MockSetDynamicVaddrEnd(uint64_t vaddr) { dynamic_vaddr_end_ = vaddr; }
 };
 
 TEST_F(ElfTest, step_in_interface) {
@@ -348,7 +363,7 @@
 
   std::string global("something");
   uint64_t offset;
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
 TEST_F(ElfTest, get_global_valid_not_in_interface) {
@@ -358,119 +373,69 @@
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
 
-  uint64_t offset;
   std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::Return(false));
 
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+  uint64_t offset;
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
-TEST_F(ElfTest, get_global_valid_below_load_bias) {
+TEST_F(ElfTest, get_global_vaddr_in_no_sections) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x1000);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
 
-  uint64_t offset;
   std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
       .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
 
-  ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_zero_non_zero_load_bias) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-  elf.FakeSetLoadBias(0x100);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetInterface(interface);
-
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x200U, offset);
+  ASSERT_FALSE(elf.GetGlobalVariableOffset(global, &offset));
 }
 
-TEST_F(ElfTest, get_global_valid_dynamic_zero) {
+TEST_F(ElfTest, get_global_vaddr_in_data_section) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
+  interface->MockSetDataVaddrStart(0x500);
+  interface->MockSetDataVaddrEnd(0x600);
+  interface->MockSetDataOffset(0xa000);
 
-  ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
-  elf.FakeSetGnuDebugdataInterface(gnu_interface);
+  std::string global("something");
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x580), ::testing::Return(true)));
 
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
-
-  EXPECT_CALL(*gnu_interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x500), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x500U, offset);
+  ASSERT_TRUE(elf.GetGlobalVariableOffset(global, &offset));
+  EXPECT_EQ(0xa080U, offset);
 }
 
-TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
+TEST_F(ElfTest, get_global_vaddr_in_dynamic_section) {
   ElfFake elf(memory_);
   elf.FakeSetValid(true);
 
   ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
   elf.FakeSetInterface(interface);
+  interface->MockSetDataVaddrStart(0x500);
+  interface->MockSetDataVaddrEnd(0x600);
+  interface->MockSetDataOffset(0xa000);
+
+  interface->MockSetDynamicVaddrStart(0x800);
+  interface->MockSetDynamicVaddrEnd(0x900);
+  interface->MockSetDynamicOffset(0xc000);
+
+  std::string global("something");
+  EXPECT_CALL(*interface, GetGlobalVariable(global, ::testing::_))
+      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x880), ::testing::Return(true)));
 
   uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x300U, offset);
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  interface->MockSetDynamicOffset(0x400);
-  interface->MockSetDynamicVaddr(0x800);
-  interface->MockSetDynamicSize(0x100);
-  elf.FakeSetInterface(interface);
-
-  uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x450U, offset);
-}
-
-TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
-  ElfFake elf(memory_);
-  elf.FakeSetValid(true);
-
-  ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
-  interface->MockSetDynamicOffset(0x1000);
-  interface->MockSetDynamicVaddr(0x800);
-  interface->MockSetDynamicSize(0x100);
-  elf.FakeSetInterface(interface);
-
-  uint64_t offset;
-  std::string global("something");
-  EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
-      .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
-
-  ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
-  EXPECT_EQ(0x1050U, offset);
+  ASSERT_TRUE(elf.GetGlobalVariableOffset(global, &offset));
+  EXPECT_EQ(0xc080U, offset);
 }
 
 TEST_F(ElfTest, is_valid_pc_elf_invalid) {
diff --git a/libunwindstack/tests/JitDebugTest.cpp b/libunwindstack/tests/JitDebugTest.cpp
index b1ca111..9b32a3a 100644
--- a/libunwindstack/tests/JitDebugTest.cpp
+++ b/libunwindstack/tests/JitDebugTest.cpp
@@ -35,13 +35,17 @@
 
 class JitDebugTest : public ::testing::Test {
  protected:
-  void CreateFakeElf(MapInfo* map_info) {
+  void CreateFakeElf(MapInfo* map_info, uint64_t global_offset, uint64_t data_offset,
+                     uint64_t data_vaddr, uint64_t data_size) {
     MemoryFake* memory = new MemoryFake;
     ElfFake* elf = new ElfFake(memory);
     elf->FakeSetValid(true);
     ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
     elf->FakeSetInterface(interface);
-    interface->FakeSetGlobalVariable("__jit_debug_descriptor", 0x800);
+    interface->FakeSetGlobalVariable("__jit_debug_descriptor", global_offset);
+    interface->FakeSetDataOffset(data_offset);
+    interface->FakeSetDataVaddrStart(data_vaddr);
+    interface->FakeSetDataVaddrEnd(data_vaddr + data_size);
     map_info->elf.reset(elf);
   }
 
@@ -52,27 +56,27 @@
     maps_.reset(
         new BufferMaps("1000-4000 ---s 00000000 00:00 0 /fake/elf1\n"
                        "4000-6000 r--s 00000000 00:00 0 /fake/elf1\n"
-                       "6000-8000 -wxs 00000000 00:00 0 /fake/elf1\n"
+                       "6000-8000 -wxs 00002000 00:00 0 /fake/elf1\n"
                        "a000-c000 --xp 00000000 00:00 0 /fake/elf2\n"
-                       "c000-f000 rw-p 00001000 00:00 0 /fake/elf2\n"
+                       "c000-f000 rw-p 00002000 00:00 0 /fake/elf2\n"
                        "f000-11000 r--p 00000000 00:00 0 /fake/elf3\n"
-                       "11000-12000 rw-p 00001000 00:00 0 /fake/elf3\n"
+                       "11000-12000 rw-p 00002000 00:00 0 /fake/elf3\n"
                        "12000-14000 r--p 00000000 00:00 0 /fake/elf4\n"
-                       "100000-110000 rw-p 0001000 00:00 0 /fake/elf4\n"
-                       "200000-210000 rw-p 0002000 00:00 0 /fake/elf4\n"));
+                       "100000-110000 rw-p 00ee000 00:00 0 /fake/elf4\n"
+                       "200000-210000 rw-p 01ee000 00:00 0 /fake/elf4\n"));
     ASSERT_TRUE(maps_->Parse());
 
     MapInfo* map_info = maps_->Get(3);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     map_info = maps_->Get(5);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0x2800, 0x2000, 0x2000, 0x3000);
 
     map_info = maps_->Get(7);
     ASSERT_TRUE(map_info != nullptr);
-    CreateFakeElf(map_info);
+    CreateFakeElf(map_info, 0xee800, 0xee000, 0xee000, 0x10000);
   }
 
   void SetUp() override {
@@ -258,7 +262,7 @@
 TEST_F(JitDebugTest, get_elf_no_valid_code_entry) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -267,7 +271,7 @@
 TEST_F(JitDebugTest, get_elf_invalid_descriptor_first_entry) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0);
+  WriteDescriptor32(0x11800, 0);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -276,9 +280,9 @@
 TEST_F(JitDebugTest, get_elf_invalid_descriptor_version) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x20000);
+  WriteDescriptor32(0x11800, 0x20000);
   // Set the version to an invalid value.
-  memory_->SetData32(0xf800, 2);
+  memory_->SetData32(0x11800, 2);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
   ASSERT_TRUE(elf == nullptr);
@@ -287,7 +291,7 @@
 TEST_F(JitDebugTest, get_elf_32) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
@@ -304,16 +308,16 @@
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x5000, ELFCLASS32, EM_ARM, 0x2000, 0x300);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
-  WriteDescriptor32(0x12800, 0x201000);
+  WriteDescriptor32(0x100800, 0x201000);
   WriteEntry32Pad(0x201000, 0, 0, 0x5000, 0x1000);
 
   ASSERT_TRUE(jit_debug_->GetElf(maps_.get(), 0x1500) != nullptr);
   ASSERT_TRUE(jit_debug_->GetElf(maps_.get(), 0x2000) == nullptr);
 
   // Now clear the descriptor entry for the first one.
-  WriteDescriptor32(0xf800, 0);
+  WriteDescriptor32(0x11800, 0);
   jit_debug_.reset(new JitDebug(process_memory_));
   jit_debug_->SetArch(ARCH_ARM);
 
@@ -326,7 +330,7 @@
 
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pack(0x200000, 0, 0, 0x4000, 0x1000);
 
   jit_debug_->SetArch(ARCH_X86);
@@ -345,7 +349,7 @@
 
   CreateElf<Elf64_Ehdr, Elf64_Shdr>(0x4000, ELFCLASS64, EM_AARCH64, 0x1500, 0x200);
 
-  WriteDescriptor64(0xf800, 0x200000);
+  WriteDescriptor64(0x11800, 0x200000);
   WriteEntry64(0x200000, 0, 0, 0x4000, 0x1000);
 
   Elf* elf = jit_debug_->GetElf(maps_.get(), 0x1500);
@@ -362,7 +366,7 @@
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x5000, ELFCLASS32, EM_ARM, 0x2300, 0x400);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0x200100, 0x4000, 0x1000);
   WriteEntry32Pad(0x200100, 0x200100, 0, 0x5000, 0x1000);
 
@@ -385,7 +389,7 @@
 TEST_F(JitDebugTest, get_elf_search_libs) {
   CreateElf<Elf32_Ehdr, Elf32_Shdr>(0x4000, ELFCLASS32, EM_ARM, 0x1500, 0x200);
 
-  WriteDescriptor32(0xf800, 0x200000);
+  WriteDescriptor32(0x11800, 0x200000);
   WriteEntry32Pad(0x200000, 0, 0, 0x4000, 0x1000);
 
   // Only search a given named list of libs.
diff --git a/libunwindstack/tests/MapInfoCreateMemoryTest.cpp b/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
index 6c1cfa2..6d8d58e 100644
--- a/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
+++ b/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
@@ -89,7 +89,7 @@
 };
 
 TEST_F(MapInfoCreateMemoryTest, end_le_start) {
-  MapInfo info(nullptr, 0x100, 0x100, 0, 0, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x100, 0x100, 0, 0, elf_.path);
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() == nullptr);
@@ -108,7 +108,7 @@
 // Verify that if the offset is non-zero but there is no elf at the offset,
 // that the full file is used.
 TEST_F(MapInfoCreateMemoryTest, file_backed_non_zero_offset_full_file) {
-  MapInfo info(nullptr, 0x100, 0x200, 0x100, 0, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x100, 0x200, 0x100, 0, elf_.path);
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() != nullptr);
@@ -129,8 +129,9 @@
 
   // Now verify the elf start offset is set correctly based on the previous
   // info.
-  MapInfo prev_info(nullptr, 0, 0x100, 0x10, 0, "");
+  MapInfo prev_info(nullptr, nullptr, 0, 0x100, 0x10, 0, "");
   info.prev_map = &prev_info;
+  info.prev_real_map = &prev_info;
 
   // No preconditions met, change each one until it should set the elf start
   // offset to zero.
@@ -177,7 +178,7 @@
 // Verify that if the offset is non-zero and there is an elf at that
 // offset, that only part of the file is used.
 TEST_F(MapInfoCreateMemoryTest, file_backed_non_zero_offset_partial_file) {
-  MapInfo info(nullptr, 0x100, 0x200, 0x1000, 0, elf_at_1000_.path);
+  MapInfo info(nullptr, nullptr, 0x100, 0x200, 0x1000, 0, elf_at_1000_.path);
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() != nullptr);
@@ -202,7 +203,7 @@
 // embedded elf is bigger than the initial map, the new object is larger
 // than the original map size. Do this for a 32 bit elf and a 64 bit elf.
 TEST_F(MapInfoCreateMemoryTest, file_backed_non_zero_offset_partial_file_whole_elf32) {
-  MapInfo info(nullptr, 0x5000, 0x6000, 0x1000, 0, elf32_at_map_.path);
+  MapInfo info(nullptr, nullptr, 0x5000, 0x6000, 0x1000, 0, elf32_at_map_.path);
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() != nullptr);
@@ -220,7 +221,7 @@
 }
 
 TEST_F(MapInfoCreateMemoryTest, file_backed_non_zero_offset_partial_file_whole_elf64) {
-  MapInfo info(nullptr, 0x7000, 0x8000, 0x2000, 0, elf64_at_map_.path);
+  MapInfo info(nullptr, nullptr, 0x7000, 0x8000, 0x2000, 0, elf64_at_map_.path);
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() != nullptr);
@@ -243,14 +244,14 @@
   // be returned if the file mapping fails, but the device check is incorrect.
   std::vector<uint8_t> buffer(1024);
   uint64_t start = reinterpret_cast<uint64_t>(buffer.data());
-  MapInfo info(nullptr, start, start + buffer.size(), 0, 0x8000, "/dev/something");
+  MapInfo info(nullptr, nullptr, start, start + buffer.size(), 0, 0x8000, "/dev/something");
 
   std::unique_ptr<Memory> memory(info.CreateMemory(process_memory_));
   ASSERT_TRUE(memory.get() == nullptr);
 }
 
 TEST_F(MapInfoCreateMemoryTest, process_memory) {
-  MapInfo info(nullptr, 0x2000, 0x3000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x2000, 0x3000, 0, PROT_READ, "");
 
   Elf32_Ehdr ehdr = {};
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
diff --git a/libunwindstack/tests/MapInfoGetBuildIDTest.cpp b/libunwindstack/tests/MapInfoGetBuildIDTest.cpp
index 16451d1..6953e26 100644
--- a/libunwindstack/tests/MapInfoGetBuildIDTest.cpp
+++ b/libunwindstack/tests/MapInfoGetBuildIDTest.cpp
@@ -50,7 +50,8 @@
     elf_interface_ = new ElfInterfaceFake(memory_);
     elf_->FakeSetInterface(elf_interface_);
     elf_container_.reset(elf_);
-    map_info_.reset(new MapInfo(nullptr, 0x1000, 0x20000, 0, PROT_READ | PROT_WRITE, tf_->path));
+    map_info_.reset(
+        new MapInfo(nullptr, nullptr, 0x1000, 0x20000, 0, PROT_READ | PROT_WRITE, tf_->path));
   }
 
   void MultipleThreadTest(std::string expected_build_id);
@@ -64,7 +65,7 @@
 };
 
 TEST_F(MapInfoGetBuildIDTest, no_elf_and_no_valid_elf_in_memory) {
-  MapInfo info(nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
 
   EXPECT_EQ("", info.GetBuildID());
   EXPECT_EQ("", info.GetPrintableBuildID());
diff --git a/libunwindstack/tests/MapInfoGetElfTest.cpp b/libunwindstack/tests/MapInfoGetElfTest.cpp
index d60b8b1..7f97814 100644
--- a/libunwindstack/tests/MapInfoGetElfTest.cpp
+++ b/libunwindstack/tests/MapInfoGetElfTest.cpp
@@ -68,7 +68,7 @@
 };
 
 TEST_F(MapInfoGetElfTest, invalid) {
-  MapInfo info(nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
 
   // The map is empty, but this should still create an invalid elf object.
   Elf* elf = info.GetElf(process_memory_, ARCH_ARM);
@@ -77,7 +77,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, valid32) {
-  MapInfo info(nullptr, 0x3000, 0x4000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x3000, 0x4000, 0, PROT_READ, "");
 
   Elf32_Ehdr ehdr;
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
@@ -97,7 +97,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, valid64) {
-  MapInfo info(nullptr, 0x8000, 0x9000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x8000, 0x9000, 0, PROT_READ, "");
 
   Elf64_Ehdr ehdr;
   TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64);
@@ -111,7 +111,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, invalid_arch_mismatch) {
-  MapInfo info(nullptr, 0x3000, 0x4000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x3000, 0x4000, 0, PROT_READ, "");
 
   Elf32_Ehdr ehdr;
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
@@ -123,7 +123,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, gnu_debugdata_init32) {
-  MapInfo info(nullptr, 0x2000, 0x3000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x2000, 0x3000, 0, PROT_READ, "");
 
   TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, true,
                                                [&](uint64_t offset, const void* ptr, size_t size) {
@@ -139,7 +139,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, gnu_debugdata_init64) {
-  MapInfo info(nullptr, 0x5000, 0x8000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x5000, 0x8000, 0, PROT_READ, "");
 
   TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, true,
                                                [&](uint64_t offset, const void* ptr, size_t size) {
@@ -155,7 +155,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, end_le_start) {
-  MapInfo info(nullptr, 0x1000, 0x1000, 0, PROT_READ, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x1000, 0x1000, 0, PROT_READ, elf_.path);
 
   Elf32_Ehdr ehdr;
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
@@ -182,7 +182,7 @@
 // Verify that if the offset is non-zero but there is no elf at the offset,
 // that the full file is used.
 TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_full_file) {
-  MapInfo info(nullptr, 0x1000, 0x2000, 0x100, PROT_READ, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x1000, 0x2000, 0x100, PROT_READ, elf_.path);
 
   std::vector<uint8_t> buffer(0x1000);
   memset(buffer.data(), 0, buffer.size());
@@ -211,7 +211,7 @@
 // Verify that if the offset is non-zero and there is an elf at that
 // offset, that only part of the file is used.
 TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file) {
-  MapInfo info(nullptr, 0x1000, 0x2000, 0x2000, PROT_READ, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x1000, 0x2000, 0x2000, PROT_READ, elf_.path);
 
   std::vector<uint8_t> buffer(0x4000);
   memset(buffer.data(), 0, buffer.size());
@@ -241,7 +241,7 @@
 // embedded elf is bigger than the initial map, the new object is larger
 // than the original map size. Do this for a 32 bit elf and a 64 bit elf.
 TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf32) {
-  MapInfo info(nullptr, 0x5000, 0x6000, 0x1000, PROT_READ, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x5000, 0x6000, 0x1000, PROT_READ, elf_.path);
 
   std::vector<uint8_t> buffer(0x4000);
   memset(buffer.data(), 0, buffer.size());
@@ -269,7 +269,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf64) {
-  MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, elf_.path);
+  MapInfo info(nullptr, nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, elf_.path);
 
   std::vector<uint8_t> buffer(0x4000);
   memset(buffer.data(), 0, buffer.size());
@@ -297,7 +297,7 @@
 }
 
 TEST_F(MapInfoGetElfTest, check_device_maps) {
-  MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ | MAPS_FLAGS_DEVICE_MAP,
+  MapInfo info(nullptr, nullptr, 0x7000, 0x8000, 0x1000, PROT_READ | MAPS_FLAGS_DEVICE_MAP,
                "/dev/something");
 
   // Create valid elf data in process memory for this to verify that only
@@ -343,7 +343,7 @@
   wait = true;
   // Create all of the threads and have them do the GetElf at the same time
   // to make it likely that a race will occur.
-  MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, "");
   for (size_t i = 0; i < kNumConcurrentThreads; i++) {
     std::thread* thread = new std::thread([i, this, &wait, &info, &elf_in_threads]() {
       while (wait)
@@ -373,8 +373,8 @@
 
 // Verify that previous maps don't automatically get the same elf object.
 TEST_F(MapInfoGetElfTest, prev_map_elf_not_set) {
-  MapInfo info1(nullptr, 0x1000, 0x2000, 0, PROT_READ, "/not/present");
-  MapInfo info2(&info1, 0x2000, 0x3000, 0, PROT_READ, elf_.path);
+  MapInfo info1(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, "/not/present");
+  MapInfo info2(&info1, &info1, 0x2000, 0x3000, 0, PROT_READ, elf_.path);
 
   Elf32_Ehdr ehdr;
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
@@ -389,8 +389,25 @@
 // Verify that a read-only map followed by a read-execute map will result
 // in the same elf object in both maps.
 TEST_F(MapInfoGetElfTest, read_only_followed_by_read_exec_share_elf) {
-  MapInfo r_info(nullptr, 0x1000, 0x2000, 0, PROT_READ, elf_.path);
-  MapInfo rw_info(&r_info, 0x2000, 0x3000, 0x1000, PROT_READ | PROT_EXEC, elf_.path);
+  MapInfo r_info(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, elf_.path);
+  MapInfo rw_info(&r_info, &r_info, 0x2000, 0x3000, 0x1000, PROT_READ | PROT_EXEC, elf_.path);
+
+  Elf32_Ehdr ehdr;
+  TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
+  memory_->SetMemory(0x1000, &ehdr, sizeof(ehdr));
+  Elf* elf = rw_info.GetElf(process_memory_, ARCH_ARM);
+  ASSERT_TRUE(elf != nullptr);
+  ASSERT_TRUE(elf->valid());
+
+  ASSERT_EQ(elf, r_info.GetElf(process_memory_, ARCH_ARM));
+}
+
+// Verify that a read-only map followed by an empty map, then followed by
+// a read-execute map will result in the same elf object in both maps.
+TEST_F(MapInfoGetElfTest, read_only_followed_by_empty_then_read_exec_share_elf) {
+  MapInfo r_info(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, elf_.path);
+  MapInfo empty(&r_info, &r_info, 0x2000, 0x3000, 0, 0, "");
+  MapInfo rw_info(&empty, &r_info, 0x3000, 0x4000, 0x2000, PROT_READ | PROT_EXEC, elf_.path);
 
   Elf32_Ehdr ehdr;
   TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
diff --git a/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp b/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
index da3dbf2..971d452 100644
--- a/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
+++ b/libunwindstack/tests/MapInfoGetLoadBiasTest.cpp
@@ -50,7 +50,7 @@
     process_memory_.reset(memory_);
     elf_ = new ElfFake(new MemoryFake);
     elf_container_.reset(elf_);
-    map_info_.reset(new MapInfo(nullptr, 0x1000, 0x20000, 0, PROT_READ | PROT_WRITE, ""));
+    map_info_.reset(new MapInfo(nullptr, nullptr, 0x1000, 0x20000, 0, PROT_READ | PROT_WRITE, ""));
   }
 
   void MultipleThreadTest(uint64_t expected_load_bias);
@@ -63,7 +63,7 @@
 };
 
 TEST_F(MapInfoGetLoadBiasTest, no_elf_and_no_valid_elf_in_memory) {
-  MapInfo info(nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
+  MapInfo info(nullptr, nullptr, 0x1000, 0x2000, 0, PROT_READ, "");
 
   EXPECT_EQ(0U, info.GetLoadBias(process_memory_));
 }
diff --git a/libunwindstack/tests/MapInfoTest.cpp b/libunwindstack/tests/MapInfoTest.cpp
index ef76b1b..98edc0e 100644
--- a/libunwindstack/tests/MapInfoTest.cpp
+++ b/libunwindstack/tests/MapInfoTest.cpp
@@ -26,8 +26,8 @@
 namespace unwindstack {
 
 TEST(MapInfoTest, maps_constructor_const_char) {
-  MapInfo prev_map(nullptr, 0, 0, 0, 0, "");
-  MapInfo map_info(&prev_map, 1, 2, 3, 4, "map");
+  MapInfo prev_map(nullptr, nullptr, 0, 0, 0, 0, "");
+  MapInfo map_info(&prev_map, &prev_map, 1, 2, 3, 4, "map");
 
   EXPECT_EQ(&prev_map, map_info.prev_map);
   EXPECT_EQ(1UL, map_info.start);
@@ -42,8 +42,8 @@
 
 TEST(MapInfoTest, maps_constructor_string) {
   std::string name("string_map");
-  MapInfo prev_map(nullptr, 0, 0, 0, 0, "");
-  MapInfo map_info(&prev_map, 1, 2, 3, 4, name);
+  MapInfo prev_map(nullptr, nullptr, 0, 0, 0, 0, "");
+  MapInfo map_info(&prev_map, &prev_map, 1, 2, 3, 4, name);
 
   EXPECT_EQ(&prev_map, map_info.prev_map);
   EXPECT_EQ(1UL, map_info.start);
@@ -62,7 +62,7 @@
   elf->FakeSetInterface(interface);
   interface->FakePushFunctionData(FunctionData("function", 1000));
 
-  MapInfo map_info(nullptr, 1, 2, 3, 4, "");
+  MapInfo map_info(nullptr, nullptr, 1, 2, 3, 4, "");
   map_info.elf.reset(elf);
 
   std::string name;
diff --git a/libunwindstack/tests/MapsTest.cpp b/libunwindstack/tests/MapsTest.cpp
index 9e7a6ab..724eeb5 100644
--- a/libunwindstack/tests/MapsTest.cpp
+++ b/libunwindstack/tests/MapsTest.cpp
@@ -82,7 +82,7 @@
 }
 
 TEST(MapsTest, verify_parse_line) {
-  MapInfo info(nullptr, 0, 0, 0, 0, "");
+  MapInfo info(nullptr, nullptr, 0, 0, 0, 0, "");
 
   VerifyLine("01-02 rwxp 03 04:05 06\n", &info);
   EXPECT_EQ(1U, info.start);
@@ -155,7 +155,7 @@
 }
 
 TEST(MapsTest, verify_large_values) {
-  MapInfo info(nullptr, 0, 0, 0, 0, "");
+  MapInfo info(nullptr, nullptr, 0, 0, 0, 0, "");
 #if defined(__LP64__)
   VerifyLine("fabcdef012345678-f12345678abcdef8 rwxp f0b0d0f010305070 00:00 0\n", &info);
   EXPECT_EQ(0xfabcdef012345678UL, info.start);
diff --git a/libunwindstack/tests/RegsIterateTest.cpp b/libunwindstack/tests/RegsIterateTest.cpp
index 7e36953..47e605a 100644
--- a/libunwindstack/tests/RegsIterateTest.cpp
+++ b/libunwindstack/tests/RegsIterateTest.cpp
@@ -111,9 +111,10 @@
   result.push_back({"x27", ARM64_REG_R27});
   result.push_back({"x28", ARM64_REG_R28});
   result.push_back({"x29", ARM64_REG_R29});
-  result.push_back({"sp", ARM64_REG_SP});
   result.push_back({"lr", ARM64_REG_LR});
+  result.push_back({"sp", ARM64_REG_SP});
   result.push_back({"pc", ARM64_REG_PC});
+  result.push_back({"pst", ARM64_REG_PSTATE});
   return result;
 }
 
diff --git a/libunwindstack/tests/RegsTest.cpp b/libunwindstack/tests/RegsTest.cpp
index 472d1cf..0a33e2f 100644
--- a/libunwindstack/tests/RegsTest.cpp
+++ b/libunwindstack/tests/RegsTest.cpp
@@ -182,7 +182,7 @@
   RegsX86_64 regs_x86_64;
   RegsMips regs_mips;
   RegsMips64 regs_mips64;
-  MapInfo map_info(nullptr, 0x1000, 0x2000, 0, 0, "");
+  MapInfo map_info(nullptr, nullptr, 0x1000, 0x2000, 0, 0, "");
   Elf* invalid_elf = new Elf(nullptr);
   map_info.elf.reset(invalid_elf);
 
diff --git a/libunwindstack/tests/SymbolsTest.cpp b/libunwindstack/tests/SymbolsTest.cpp
index ae3c349..c58aeff 100644
--- a/libunwindstack/tests/SymbolsTest.cpp
+++ b/libunwindstack/tests/SymbolsTest.cpp
@@ -367,6 +367,6 @@
                             symtab_read_cached, get_global);
 
 typedef ::testing::Types<Elf32_Sym, Elf64_Sym> SymbolsTestTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(, SymbolsTest, SymbolsTestTypes);
+INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, SymbolsTest, SymbolsTestTypes);
 
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/UnwindOfflineTest.cpp b/libunwindstack/tests/UnwindOfflineTest.cpp
index 72eef3e..c2bd836 100644
--- a/libunwindstack/tests/UnwindOfflineTest.cpp
+++ b/libunwindstack/tests/UnwindOfflineTest.cpp
@@ -169,15 +169,18 @@
 };
 
 std::unordered_map<std::string, uint32_t> UnwindOfflineTest::arm64_regs_ = {
-    {"x0", ARM64_REG_R0},   {"x1", ARM64_REG_R1},   {"x2", ARM64_REG_R2},   {"x3", ARM64_REG_R3},
-    {"x4", ARM64_REG_R4},   {"x5", ARM64_REG_R5},   {"x6", ARM64_REG_R6},   {"x7", ARM64_REG_R7},
-    {"x8", ARM64_REG_R8},   {"x9", ARM64_REG_R9},   {"x10", ARM64_REG_R10}, {"x11", ARM64_REG_R11},
-    {"x12", ARM64_REG_R12}, {"x13", ARM64_REG_R13}, {"x14", ARM64_REG_R14}, {"x15", ARM64_REG_R15},
-    {"x16", ARM64_REG_R16}, {"x17", ARM64_REG_R17}, {"x18", ARM64_REG_R18}, {"x19", ARM64_REG_R19},
-    {"x20", ARM64_REG_R20}, {"x21", ARM64_REG_R21}, {"x22", ARM64_REG_R22}, {"x23", ARM64_REG_R23},
-    {"x24", ARM64_REG_R24}, {"x25", ARM64_REG_R25}, {"x26", ARM64_REG_R26}, {"x27", ARM64_REG_R27},
-    {"x28", ARM64_REG_R28}, {"x29", ARM64_REG_R29}, {"sp", ARM64_REG_SP},   {"lr", ARM64_REG_LR},
-    {"pc", ARM64_REG_PC},
+    {"x0", ARM64_REG_R0},      {"x1", ARM64_REG_R1},   {"x2", ARM64_REG_R2},
+    {"x3", ARM64_REG_R3},      {"x4", ARM64_REG_R4},   {"x5", ARM64_REG_R5},
+    {"x6", ARM64_REG_R6},      {"x7", ARM64_REG_R7},   {"x8", ARM64_REG_R8},
+    {"x9", ARM64_REG_R9},      {"x10", ARM64_REG_R10}, {"x11", ARM64_REG_R11},
+    {"x12", ARM64_REG_R12},    {"x13", ARM64_REG_R13}, {"x14", ARM64_REG_R14},
+    {"x15", ARM64_REG_R15},    {"x16", ARM64_REG_R16}, {"x17", ARM64_REG_R17},
+    {"x18", ARM64_REG_R18},    {"x19", ARM64_REG_R19}, {"x20", ARM64_REG_R20},
+    {"x21", ARM64_REG_R21},    {"x22", ARM64_REG_R22}, {"x23", ARM64_REG_R23},
+    {"x24", ARM64_REG_R24},    {"x25", ARM64_REG_R25}, {"x26", ARM64_REG_R26},
+    {"x27", ARM64_REG_R27},    {"x28", ARM64_REG_R28}, {"x29", ARM64_REG_R29},
+    {"sp", ARM64_REG_SP},      {"lr", ARM64_REG_LR},   {"pc", ARM64_REG_PC},
+    {"pst", ARM64_REG_PSTATE},
 };
 
 std::unordered_map<std::string, uint32_t> UnwindOfflineTest::x86_regs_ = {
@@ -1583,4 +1586,154 @@
   EXPECT_EQ(0x7fdd4a4170ULL, unwinder.frames()[11].sp);
 }
 
+TEST_F(UnwindOfflineTest, eh_frame_bias_x86) {
+  ASSERT_NO_FATAL_FAILURE(Init("eh_frame_bias_x86/", ARCH_X86));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(11U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc ffffe430  vdso.so (__kernel_vsyscall+16)\n"
+      "  #01 pc 00082a4b  libc.so (__epoll_pwait+43)\n"
+      "  #02 pc 000303a3  libc.so (epoll_pwait+115)\n"
+      "  #03 pc 000303ed  libc.so (epoll_wait+45)\n"
+      "  #04 pc 00010ea2  tombstoned (epoll_dispatch+226)\n"
+      "  #05 pc 0000c5e7  tombstoned (event_base_loop+1095)\n"
+      "  #06 pc 0000c193  tombstoned (event_base_dispatch+35)\n"
+      "  #07 pc 00005c77  tombstoned (main+884)\n"
+      "  #08 pc 00015f66  libc.so (__libc_init+102)\n"
+      "  #09 pc 0000360e  tombstoned (_start+98)\n"
+      "  #10 pc 00000001  <unknown>\n",
+      frame_info);
+
+  EXPECT_EQ(0xffffe430ULL, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xfffe1a30ULL, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xeb585a4bULL, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xfffe1a40ULL, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xeb5333a3ULL, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xfffe1a60ULL, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xeb5333edULL, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xfffe1ab0ULL, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xeb841ea2ULL, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xfffe1ae0ULL, unwinder.frames()[4].sp);
+  EXPECT_EQ(0xeb83d5e7ULL, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xfffe1b30ULL, unwinder.frames()[5].sp);
+  EXPECT_EQ(0xeb83d193ULL, unwinder.frames()[6].pc);
+  EXPECT_EQ(0xfffe1bd0ULL, unwinder.frames()[6].sp);
+  EXPECT_EQ(0xeb836c77ULL, unwinder.frames()[7].pc);
+  EXPECT_EQ(0xfffe1c00ULL, unwinder.frames()[7].sp);
+  EXPECT_EQ(0xeb518f66ULL, unwinder.frames()[8].pc);
+  EXPECT_EQ(0xfffe1d00ULL, unwinder.frames()[8].sp);
+  EXPECT_EQ(0xeb83460eULL, unwinder.frames()[9].pc);
+  EXPECT_EQ(0xfffe1d40ULL, unwinder.frames()[9].sp);
+  EXPECT_EQ(0x00000001ULL, unwinder.frames()[10].pc);
+  EXPECT_EQ(0xfffe1d74ULL, unwinder.frames()[10].sp);
+}
+
+TEST_F(UnwindOfflineTest, signal_load_bias_arm) {
+  ASSERT_NO_FATAL_FAILURE(Init("signal_load_bias_arm/", ARCH_ARM));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(17U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 0029ef9e  libunwindstack_unit_test (SignalInnerFunction+10)\n"
+      "  #01 pc 0029efa7  libunwindstack_unit_test (SignalMiddleFunction+2)\n"
+      "  #02 pc 0029efaf  libunwindstack_unit_test (SignalOuterFunction+2)\n"
+      "  #03 pc 002a280b  libunwindstack_unit_test (unwindstack::SignalCallerHandler(int, "
+      "siginfo*, void*)+10)\n"
+      "  #04 pc 00058bd4  libc.so (__restore)\n"
+      "  #05 pc 0029f01e  libunwindstack_unit_test (InnerFunction+106)\n"
+      "  #06 pc 0029f633  libunwindstack_unit_test (MiddleFunction+16)\n"
+      "  #07 pc 0029f64b  libunwindstack_unit_test (OuterFunction+16)\n"
+      "  #08 pc 002a1711  libunwindstack_unit_test (unwindstack::RemoteThroughSignal(int, unsigned "
+      "int)+260)\n"
+      "  #09 pc 002a1603  libunwindstack_unit_test "
+      "(unwindstack::UnwindTest_remote_through_signal_Test::TestBody()+10)\n"
+      "  #10 pc 002c8fe3  libunwindstack_unit_test (testing::Test::Run()+130)\n"
+      "  #11 pc 002c9b25  libunwindstack_unit_test (testing::TestInfo::Run()+184)\n"
+      "  #12 pc 002c9e27  libunwindstack_unit_test (testing::TestSuite::Run()+202)\n"
+      "  #13 pc 002d193d  libunwindstack_unit_test "
+      "(testing::internal::UnitTestImpl::RunAllTests()+660)\n"
+      "  #14 pc 002d160b  libunwindstack_unit_test (testing::UnitTest::Run()+134)\n"
+      "  #15 pc 002de035  libunwindstack_unit_test (IsolateMain+680)\n"
+      "  #16 pc 00058155  libc.so (__libc_init+68)\n",
+      frame_info);
+
+  EXPECT_EQ(0xb6955f9eULL, unwinder.frames()[0].pc);
+  EXPECT_EQ(0xf2790ce8ULL, unwinder.frames()[0].sp);
+  EXPECT_EQ(0xb6955fa7ULL, unwinder.frames()[1].pc);
+  EXPECT_EQ(0xf2790ce8ULL, unwinder.frames()[1].sp);
+  EXPECT_EQ(0xb6955fafULL, unwinder.frames()[2].pc);
+  EXPECT_EQ(0xf2790cf0ULL, unwinder.frames()[2].sp);
+  EXPECT_EQ(0xb695980bULL, unwinder.frames()[3].pc);
+  EXPECT_EQ(0xf2790cf8ULL, unwinder.frames()[3].sp);
+  EXPECT_EQ(0xf23febd4ULL, unwinder.frames()[4].pc);
+  EXPECT_EQ(0xf2790d10ULL, unwinder.frames()[4].sp);
+  EXPECT_EQ(0xb695601eULL, unwinder.frames()[5].pc);
+  EXPECT_EQ(0xffe67798ULL, unwinder.frames()[5].sp);
+  EXPECT_EQ(0xb6956633ULL, unwinder.frames()[6].pc);
+  EXPECT_EQ(0xffe67890ULL, unwinder.frames()[6].sp);
+  EXPECT_EQ(0xb695664bULL, unwinder.frames()[7].pc);
+  EXPECT_EQ(0xffe678a0ULL, unwinder.frames()[7].sp);
+  EXPECT_EQ(0xb6958711ULL, unwinder.frames()[8].pc);
+  EXPECT_EQ(0xffe678b0ULL, unwinder.frames()[8].sp);
+  EXPECT_EQ(0xb6958603ULL, unwinder.frames()[9].pc);
+  EXPECT_EQ(0xffe67ac8ULL, unwinder.frames()[9].sp);
+  EXPECT_EQ(0xb697ffe3ULL, unwinder.frames()[10].pc);
+  EXPECT_EQ(0xffe67ad8ULL, unwinder.frames()[10].sp);
+  EXPECT_EQ(0xb6980b25ULL, unwinder.frames()[11].pc);
+  EXPECT_EQ(0xffe67ae8ULL, unwinder.frames()[11].sp);
+  EXPECT_EQ(0xb6980e27ULL, unwinder.frames()[12].pc);
+  EXPECT_EQ(0xffe67b18ULL, unwinder.frames()[12].sp);
+  EXPECT_EQ(0xb698893dULL, unwinder.frames()[13].pc);
+  EXPECT_EQ(0xffe67b48ULL, unwinder.frames()[13].sp);
+  EXPECT_EQ(0xb698860bULL, unwinder.frames()[14].pc);
+  EXPECT_EQ(0xffe67bb0ULL, unwinder.frames()[14].sp);
+  EXPECT_EQ(0xb6995035ULL, unwinder.frames()[15].pc);
+  EXPECT_EQ(0xffe67bd0ULL, unwinder.frames()[15].sp);
+  EXPECT_EQ(0xf23fe155ULL, unwinder.frames()[16].pc);
+  EXPECT_EQ(0xffe67d10ULL, unwinder.frames()[16].sp);
+}
+
+TEST_F(UnwindOfflineTest, empty_arm64) {
+  ASSERT_NO_FATAL_FAILURE(Init("empty_arm64/", ARCH_ARM64));
+
+  Unwinder unwinder(128, maps_.get(), regs_.get(), process_memory_);
+  unwinder.Unwind();
+
+  std::string frame_info(DumpFrames(unwinder));
+  ASSERT_EQ(7U, unwinder.NumFrames()) << "Unwind:\n" << frame_info;
+  EXPECT_EQ(
+      "  #00 pc 00000000000963a4  libc.so (__ioctl+4)\n"
+      "  #01 pc 000000000005344c  libc.so (ioctl+140)\n"
+      "  #02 pc 0000000000050ce4  libbinder.so "
+      "(android::IPCThreadState::talkWithDriver(bool)+308)\n"
+      "  #03 pc 0000000000050e98  libbinder.so "
+      "(android::IPCThreadState::getAndExecuteCommand()+24)\n"
+      "  #04 pc 00000000000516ac  libbinder.so (android::IPCThreadState::joinThreadPool(bool)+60)\n"
+      "  #05 pc 00000000000443b0  netd (main+1056)\n"
+      "  #06 pc 0000000000045594  libc.so (__libc_init+108)\n",
+      frame_info);
+
+  EXPECT_EQ(0x72a02203a4U, unwinder.frames()[0].pc);
+  EXPECT_EQ(0x7ffb6c0b50U, unwinder.frames()[0].sp);
+  EXPECT_EQ(0x72a01dd44cU, unwinder.frames()[1].pc);
+  EXPECT_EQ(0x7ffb6c0b50U, unwinder.frames()[1].sp);
+  EXPECT_EQ(0x729f759ce4U, unwinder.frames()[2].pc);
+  EXPECT_EQ(0x7ffb6c0c50U, unwinder.frames()[2].sp);
+  EXPECT_EQ(0x729f759e98U, unwinder.frames()[3].pc);
+  EXPECT_EQ(0x7ffb6c0ce0U, unwinder.frames()[3].sp);
+  EXPECT_EQ(0x729f75a6acU, unwinder.frames()[4].pc);
+  EXPECT_EQ(0x7ffb6c0d10U, unwinder.frames()[4].sp);
+  EXPECT_EQ(0x5d478af3b0U, unwinder.frames()[5].pc);
+  EXPECT_EQ(0x7ffb6c0d40U, unwinder.frames()[5].sp);
+  EXPECT_EQ(0x72a01cf594U, unwinder.frames()[6].pc);
+  EXPECT_EQ(0x7ffb6c0f30U, unwinder.frames()[6].sp);
+}
+
 }  // namespace unwindstack
diff --git a/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt b/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
index 5657373..1ff12db 100644
--- a/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
+++ b/libunwindstack/tests/files/offline/art_quick_osr_stub_arm/maps.txt
@@ -1,4 +1,4 @@
 d0250000-d2600000 r-xp 0 00:00 0 <anonymous:d0250000>
 e466e000-e4ae8000 r-xp 0 00:00 0 libart.so
-e4ae8000-e4ae9000 rw-p 1000 00:00 0 libart.so
+e4af1000-e4af2000 rw-p 482000 00:00 0 libart.so
 e7d91000-e7e31000 r-xp 0 00:00 0 libc.so
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so b/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so
new file mode 100644
index 0000000..f3eb615
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt b/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt
new file mode 100644
index 0000000..7d52483
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/maps.txt
@@ -0,0 +1,3 @@
+eb503000-eb5e8000 r-xp 0 00:00 0   libc.so
+eb831000-eb852000 r-xp 0 00:00 0   tombstoned
+ffffe000-fffff000 r-xp 0 00:00 0   vdso.so
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt b/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt
new file mode 100644
index 0000000..821928e
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/regs.txt
@@ -0,0 +1,9 @@
+eax: fffffffc
+ebx: 4
+ecx: eb290180
+edx: 20
+ebp: 8
+edi: 0
+esi: ffffffff
+esp: fffe1a30
+eip: ffffe430
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data b/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data
new file mode 100644
index 0000000..b95bfac
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/stack.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned b/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned
new file mode 100644
index 0000000..aefdb6b
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/tombstoned
Binary files differ
diff --git a/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so b/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so
new file mode 100644
index 0000000..c71dcfb
--- /dev/null
+++ b/libunwindstack/tests/files/offline/eh_frame_bias_x86/vdso.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/empty_arm64/libbinder.so b/libunwindstack/tests/files/offline/empty_arm64/libbinder.so
new file mode 100644
index 0000000..f30384c
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/libbinder.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/empty_arm64/libc.so b/libunwindstack/tests/files/offline/empty_arm64/libc.so
new file mode 100644
index 0000000..b05dcaf
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/empty_arm64/maps.txt b/libunwindstack/tests/files/offline/empty_arm64/maps.txt
new file mode 100644
index 0000000..edb83c6
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/maps.txt
@@ -0,0 +1,9 @@
+5d4786b000-5d47893000 r--p 0 00:00 0   netd
+5d47893000-5d47894000 ---p 0 00:00 0
+5d47894000-5d47901000 --xp 29000 00:00 0   netd
+729f709000-729f750000 r--p 0 00:00 0   libbinder.so
+729f750000-729f751000 ---p 0 00:00 0
+729f751000-729f794000 --xp 48000 00:00 0   libbinder.so
+72a018a000-72a01c2000 r--p 0 00:00 0   libc.so
+72a01c2000-72a01c3000 ---p 0 00:00 0
+72a01c3000-72a023b000 --xp 39000 00:00 0   libc.so
diff --git a/libunwindstack/tests/files/offline/empty_arm64/netd b/libunwindstack/tests/files/offline/empty_arm64/netd
new file mode 100644
index 0000000..8a72e94
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/netd
Binary files differ
diff --git a/libunwindstack/tests/files/offline/empty_arm64/regs.txt b/libunwindstack/tests/files/offline/empty_arm64/regs.txt
new file mode 100644
index 0000000..3d4279f
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/regs.txt
@@ -0,0 +1,34 @@
+x0: 1d
+x1: c0306201
+x2: 7ffb6c0c50
+x3: 0
+x4: 0
+x5: 0
+x6: 0
+x7: 0
+x8: 1d
+x9: 7ffb6c0c00
+x10: 7ffb6c0c50
+x11: 7ffb6c0bd0
+x12: ffffff80ffffffd0
+x13: 0
+x14: 72a0240ce2
+x15: 20
+x16: 729f7a54e8
+x17: 72a01dd3c0
+x18: 72a0ac2000
+x19: 72a0666000
+x20: 719769b610
+x21: 719769b730
+x22: c0306201
+x23: fffffff7
+x24: 72a0666000
+x25: 0
+x26: 0
+x27: 0
+x28: 0
+x29: 7ffb6c0c30
+sp: 7ffb6c0b50
+lr: 72a01dd450
+pc: 72a02203a4
+pst: a0000000
diff --git a/libunwindstack/tests/files/offline/empty_arm64/stack.data b/libunwindstack/tests/files/offline/empty_arm64/stack.data
new file mode 100644
index 0000000..6d6108c
--- /dev/null
+++ b/libunwindstack/tests/files/offline/empty_arm64/stack.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt b/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
index 4043122..3b87f2f 100644
--- a/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
+++ b/libunwindstack/tests/files/offline/jit_debug_arm/maps.txt
@@ -4,8 +4,8 @@
 e0447000-e0448000 r-xp 2000 00:00 0   137-cfi.odex
 e2796000-e4796000 r-xp 0 00:00 0   anonymous:e2796000
 e648e000-e690f000 r-xp 0 00:00 0  libart.so
-e690f000-e6910000 rw-p 1000 00:00 0  libart.so
+e6918000-e6919000 rw-p 489000 00:00 0  libart.so
 ed306000-ed801000 r-xp 0 00:00 0   libartd.so
-ed801000-ed802000 rw-p 1000 00:00 0   libartd.so
+ed80a000-ed80b000 rw-p 503000 00:00 0   libartd.so
 eda88000-edb23000 r-xp 0 00:00 0   libc.so
 ede4e000-ede50000 r-xp 0 00:00 0   anonymous:ede4e000
diff --git a/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt b/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
index f255a44..c22b5de 100644
--- a/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
+++ b/libunwindstack/tests/files/offline/jit_debug_x86/maps.txt
@@ -4,5 +4,5 @@
 ec606000-ec607000 r-xp 2000 00:00 0   137-cfi.odex
 ee74c000-f074c000 r-xp 0 00:00 0   anonymous:ee74c000
 f6be1000-f732b000 r-xp 0 00:00 0   libartd.so
-f732b000-f732c000 rw-p 1000 00:00 0   libartd.so
+f7334000-f7335000 rw-p 752000 00:00 0   libartd.so
 f734b000-f74fc000 r-xp 0 00:00 0   libc.so
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so b/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so
new file mode 100644
index 0000000..f046624
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/libc.so
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test b/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test
new file mode 100644
index 0000000..f460dd6
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/libunwindstack_unit_test
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt b/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt
new file mode 100644
index 0000000..165ae49
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/maps.txt
@@ -0,0 +1,4 @@
+b66b7000-b670c000 r--p 0 00:00 0   libunwindstack_unit_test
+b670c000-b69a8000 r-xp 54000 00:00 0   libunwindstack_unit_test
+f23a6000-f23d0000 r--p 0 00:00 0   libc.so
+f23d0000-f2451000 r-xp 29000 00:00 0   libc.so
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt b/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt
new file mode 100644
index 0000000..e03f8fd
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/regs.txt
@@ -0,0 +1,16 @@
+r0: b69b7c84
+r1: 1
+r2: 1
+r3: 1
+r4: f1e52bd0
+r5: f1e11000
+r6: f1e52bd0
+r7: f1e52a38
+r8: f1e11000
+r9: 5de82a8f
+r10: f1e06030
+r11: f1e6d080
+ip: ffe67a88
+sp: f2790ce8
+lr: b6955fab
+pc: b6955f9e
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data
new file mode 100644
index 0000000..d9f23f8
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack0.data
Binary files differ
diff --git a/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data
new file mode 100644
index 0000000..6011883
--- /dev/null
+++ b/libunwindstack/tests/files/offline/signal_load_bias_arm/stack1.data
Binary files differ
diff --git a/libunwindstack/tools/unwind_for_offline.cpp b/libunwindstack/tools/unwind_for_offline.cpp
index 4f67d67..64b58a8 100644
--- a/libunwindstack/tools/unwind_for_offline.cpp
+++ b/libunwindstack/tools/unwind_for_offline.cpp
@@ -275,6 +275,9 @@
 
     if (maps_by_start.count(frame.map_start) == 0) {
       map_info = maps->Find(frame.map_start);
+      if (map_info == nullptr) {
+        continue;
+      }
 
       auto info = FillInAndGetMapInfo(maps_by_start, map_info);
       bool file_copied = false;
diff --git a/libutils/Android.bp b/libutils/Android.bp
index 98921be..efa4c41 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -125,6 +125,7 @@
     native_bridge_supported: true,
 
     srcs: [
+        "Errors.cpp",
         "FileMap.cpp",
         "JenkinsHash.cpp",
         "NativeHandle.cpp",
diff --git a/libutils/Errors.cpp b/libutils/Errors.cpp
new file mode 100644
index 0000000..74f3bef
--- /dev/null
+++ b/libutils/Errors.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <utils/Errors.h>
+
+namespace android {
+
+std::string statusToString(status_t s) {
+#define STATUS_CASE(STATUS) \
+    case STATUS:            \
+        return #STATUS
+
+    switch (s) {
+        STATUS_CASE(OK);
+        STATUS_CASE(UNKNOWN_ERROR);
+        STATUS_CASE(NO_MEMORY);
+        STATUS_CASE(INVALID_OPERATION);
+        STATUS_CASE(BAD_VALUE);
+        STATUS_CASE(BAD_TYPE);
+        STATUS_CASE(NAME_NOT_FOUND);
+        STATUS_CASE(PERMISSION_DENIED);
+        STATUS_CASE(NO_INIT);
+        STATUS_CASE(ALREADY_EXISTS);
+        STATUS_CASE(DEAD_OBJECT);
+        STATUS_CASE(FAILED_TRANSACTION);
+        STATUS_CASE(BAD_INDEX);
+        STATUS_CASE(NOT_ENOUGH_DATA);
+        STATUS_CASE(WOULD_BLOCK);
+        STATUS_CASE(TIMED_OUT);
+        STATUS_CASE(UNKNOWN_TRANSACTION);
+        STATUS_CASE(FDS_NOT_ALLOWED);
+        STATUS_CASE(UNEXPECTED_NULL);
+#undef STATUS_CASE
+    }
+
+    return std::to_string(s) + " (" + strerror(-s) + ")";
+}
+
+}  // namespace android
diff --git a/libutils/StrongPointer.cpp b/libutils/StrongPointer.cpp
index ba52502..ef46723 100644
--- a/libutils/StrongPointer.cpp
+++ b/libutils/StrongPointer.cpp
@@ -21,4 +21,7 @@
 namespace android {
 
 void sp_report_race() { LOG_ALWAYS_FATAL("sp<> assignment detected data race"); }
+
+void sp_report_stack_pointer() { LOG_ALWAYS_FATAL("sp<> constructed with stack pointer argument"); }
+
 }
diff --git a/libutils/StrongPointer_test.cpp b/libutils/StrongPointer_test.cpp
index 153cf96..7b2e37f 100644
--- a/libutils/StrongPointer_test.cpp
+++ b/libutils/StrongPointer_test.cpp
@@ -56,3 +56,18 @@
     }
     ASSERT_TRUE(isDeleted) << "foo was leaked!";
 }
+
+TEST(StrongPointer, NullptrComparison) {
+    sp<SPFoo> foo;
+    ASSERT_EQ(foo, nullptr);
+    ASSERT_EQ(nullptr, foo);
+}
+
+TEST(StrongPointer, PointerComparison) {
+    bool isDeleted;
+    sp<SPFoo> foo = new SPFoo(&isDeleted);
+    ASSERT_EQ(foo.get(), foo);
+    ASSERT_EQ(foo, foo.get());
+    ASSERT_NE(nullptr, foo);
+    ASSERT_NE(foo, nullptr);
+}
diff --git a/libutils/Threads.cpp b/libutils/Threads.cpp
index 31ca138..540dcf4 100644
--- a/libutils/Threads.cpp
+++ b/libutils/Threads.cpp
@@ -18,8 +18,8 @@
 #define LOG_TAG "libutils.threads"
 
 #include <assert.h>
-#include <utils/Thread.h>
 #include <utils/AndroidThreads.h>
+#include <utils/Thread.h>
 
 #if !defined(_WIN32)
 # include <sys/resource.h>
@@ -36,7 +36,10 @@
 
 #include <utils/Log.h>
 
+#if defined(__ANDROID__)
+#include <processgroup/processgroup.h>
 #include <processgroup/sched_policy.h>
+#endif
 
 #if defined(__ANDROID__)
 # define __android_unused
@@ -64,6 +67,7 @@
 
 typedef void* (*android_pthread_entry)(void*);
 
+#if defined(__ANDROID__)
 struct thread_data_t {
     thread_func_t   entryFunction;
     void*           userData;
@@ -79,10 +83,11 @@
         char * name = t->threadName;
         delete t;
         setpriority(PRIO_PROCESS, 0, prio);
+
+        // A new thread will be in its parent's sched group by default,
+        // so we just need to handle the background case.
         if (prio >= ANDROID_PRIORITY_BACKGROUND) {
-            set_sched_policy(0, SP_BACKGROUND);
-        } else {
-            set_sched_policy(0, SP_FOREGROUND);
+            SetTaskProfiles(0, {"SCHED_SP_BACKGROUND"}, true);
         }
 
         if (name) {
@@ -92,6 +97,7 @@
         return f(u);
     }
 };
+#endif
 
 void androidSetThreadName(const char* name) {
 #if defined(__linux__)
@@ -300,11 +306,19 @@
 {
     int rc = 0;
     int lasterr = 0;
+    int curr_pri = getpriority(PRIO_PROCESS, tid);
+
+    if (curr_pri == pri) {
+        return rc;
+    }
 
     if (pri >= ANDROID_PRIORITY_BACKGROUND) {
-        rc = set_sched_policy(tid, SP_BACKGROUND);
-    } else if (getpriority(PRIO_PROCESS, tid) >= ANDROID_PRIORITY_BACKGROUND) {
-        rc = set_sched_policy(tid, SP_FOREGROUND);
+        rc = SetTaskProfiles(tid, {"SCHED_SP_BACKGROUND"}, true) ? 0 : -1;
+    } else if (curr_pri >= ANDROID_PRIORITY_BACKGROUND) {
+        SchedPolicy policy = SP_FOREGROUND;
+        // Change to the sched policy group of the process.
+        get_sched_policy(getpid(), &policy);
+        rc = SetTaskProfiles(tid, {get_sched_policy_profile_name(policy)}, true) ? 0 : -1;
     }
 
     if (rc) {
diff --git a/libutils/include/utils/Errors.h b/libutils/include/utils/Errors.h
index 1e03677..d14d223 100644
--- a/libutils/include/utils/Errors.h
+++ b/libutils/include/utils/Errors.h
@@ -19,6 +19,7 @@
 #include <errno.h>
 #include <stdint.h>
 #include <sys/types.h>
+#include <string>
 
 namespace android {
 
@@ -72,6 +73,9 @@
     UNEXPECTED_NULL     = (UNKNOWN_ERROR + 8),
 };
 
+// Human readable name of error
+std::string statusToString(status_t status);
+
 // Restore define; enumeration is in "android" namespace, so the value defined
 // there won't work for Win32 code in a different namespace.
 #ifdef _WIN32
diff --git a/libutils/include/utils/Flattenable.h b/libutils/include/utils/Flattenable.h
index 953b859..17c5e10 100644
--- a/libutils/include/utils/Flattenable.h
+++ b/libutils/include/utils/Flattenable.h
@@ -52,7 +52,12 @@
 
     template<size_t N>
     static size_t align(void*& buffer) {
-        return align<N>( const_cast<void const*&>(buffer) );
+        static_assert(!(N & (N - 1)), "Can only align to a power of 2.");
+        void* b = buffer;
+        buffer = reinterpret_cast<void*>((uintptr_t(buffer) + (N-1)) & ~(N-1));
+        size_t delta = size_t(uintptr_t(buffer) - uintptr_t(b));
+        memset(b, 0, delta);
+        return delta;
     }
 
     static void advance(void*& buffer, size_t& size, size_t offset) {
diff --git a/libutils/include/utils/RefBase.h b/libutils/include/utils/RefBase.h
index 42c6efb..89f048d 100644
--- a/libutils/include/utils/RefBase.h
+++ b/libutils/include/utils/RefBase.h
@@ -455,6 +455,7 @@
 };
 
 #undef COMPARE_WEAK
+#undef COMPARE_WEAK_FUNCTIONAL
 
 // ---------------------------------------------------------------------------
 // No user serviceable parts below here.
diff --git a/libutils/include/utils/String16.h b/libutils/include/utils/String16.h
index adc3e7d..27eca0c 100644
--- a/libutils/include/utils/String16.h
+++ b/libutils/include/utils/String16.h
@@ -25,18 +25,10 @@
 
 // ---------------------------------------------------------------------------
 
-extern "C" {
-
-}
-
-// ---------------------------------------------------------------------------
-
 namespace android {
 
 // ---------------------------------------------------------------------------
 
-class String8;
-
 template <size_t N>
 class StaticString16;
 
diff --git a/libutils/include/utils/StrongPointer.h b/libutils/include/utils/StrongPointer.h
index 9cd7c75..6f4fb47 100644
--- a/libutils/include/utils/StrongPointer.h
+++ b/libutils/include/utils/StrongPointer.h
@@ -27,43 +27,6 @@
 
 // ---------------------------------------------------------------------------
 
-// TODO: Maybe remove sp<> ? wp<> comparison? These are dangerous: If the wp<>
-// was created before the sp<>, and they point to different objects, they may
-// compare equal even if they are entirely unrelated. E.g. CameraService
-// currently performa such comparisons.
-
-#define COMPARE_STRONG(_op_)                                           \
-template<typename U>                                            \
-inline bool operator _op_ (const sp<U>& o) const {              \
-    return m_ptr _op_ o.m_ptr;                                  \
-}                                                               \
-template<typename U>                                            \
-inline bool operator _op_ (const U* o) const {                  \
-    return m_ptr _op_ o;                                        \
-}                                                               \
-/* Needed to handle type inference for nullptr: */              \
-inline bool operator _op_ (const T* o) const {                  \
-    return m_ptr _op_ o;                                        \
-}
-
-template<template<typename C> class comparator, typename T, typename U>
-static inline bool _sp_compare_(T* a, U* b) {
-    return comparator<typename std::common_type<T*, U*>::type>()(a, b);
-}
-
-// Use std::less and friends to avoid undefined behavior when ordering pointers
-// to different objects.
-#define COMPARE_STRONG_FUNCTIONAL(_op_, _compare_)               \
-template<typename U>                                             \
-inline bool operator _op_ (const sp<U>& o) const {               \
-    return _sp_compare_<_compare_>(m_ptr, o.m_ptr);              \
-}                                                                \
-template<typename U>                                             \
-inline bool operator _op_ (const U* o) const {                   \
-    return _sp_compare_<_compare_>(m_ptr, o);                    \
-}
-// ---------------------------------------------------------------------------
-
 template<typename T>
 class sp {
 public:
@@ -102,15 +65,6 @@
     inline T*       get() const            { return m_ptr; }
     inline explicit operator bool () const { return m_ptr != nullptr; }
 
-    // Operators
-
-    COMPARE_STRONG(==)
-    COMPARE_STRONG(!=)
-    COMPARE_STRONG_FUNCTIONAL(>, std::greater)
-    COMPARE_STRONG_FUNCTIONAL(<, std::less)
-    COMPARE_STRONG_FUNCTIONAL(<=, std::less_equal)
-    COMPARE_STRONG_FUNCTIONAL(>=, std::greater_equal)
-
     // Punt these to the wp<> implementation.
     template<typename U>
     inline bool operator == (const wp<U>& o) const {
@@ -122,26 +76,111 @@
         return o != *this;
     }
 
-private:    
+private:
     template<typename Y> friend class sp;
     template<typename Y> friend class wp;
     void set_pointer(T* ptr);
+    static inline void check_not_on_stack(const void* ptr);
     T* m_ptr;
 };
 
-// For code size reasons, we do not want this inlined or templated.
-void sp_report_race();
+#define COMPARE_STRONG(_op_)                                           \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const sp<T>& t, const sp<U>& u) { \
+        return t.get() _op_ u.get();                                   \
+    }                                                                  \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const T* t, const sp<U>& u) {     \
+        return t _op_ u.get();                                         \
+    }                                                                  \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const sp<T>& t, const U* u) {     \
+        return t.get() _op_ u;                                         \
+    }                                                                  \
+    template <typename T>                                              \
+    static inline bool operator _op_(const sp<T>& t, std::nullptr_t) { \
+        return t.get() _op_ nullptr;                                   \
+    }                                                                  \
+    template <typename T>                                              \
+    static inline bool operator _op_(std::nullptr_t, const sp<T>& t) { \
+        return nullptr _op_ t.get();                                   \
+    }
 
-#undef COMPARE
+template <template <typename C> class comparator, typename T, typename U>
+static inline bool _sp_compare_(T* a, U* b) {
+    return comparator<typename std::common_type<T*, U*>::type>()(a, b);
+}
+
+#define COMPARE_STRONG_FUNCTIONAL(_op_, _compare_)                     \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const sp<T>& t, const sp<U>& u) { \
+        return _sp_compare_<_compare_>(t.get(), u.get());              \
+    }                                                                  \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const T* t, const sp<U>& u) {     \
+        return _sp_compare_<_compare_>(t, u.get());                    \
+    }                                                                  \
+    template <typename T, typename U>                                  \
+    static inline bool operator _op_(const sp<T>& t, const U* u) {     \
+        return _sp_compare_<_compare_>(t.get(), u);                    \
+    }                                                                  \
+    template <typename T>                                              \
+    static inline bool operator _op_(const sp<T>& t, std::nullptr_t) { \
+        return _sp_compare_<_compare_>(t.get(), nullptr);              \
+    }                                                                  \
+    template <typename T>                                              \
+    static inline bool operator _op_(std::nullptr_t, const sp<T>& t) { \
+        return _sp_compare_<_compare_>(nullptr, t.get());              \
+    }
+
+COMPARE_STRONG(==)
+COMPARE_STRONG(!=)
+COMPARE_STRONG_FUNCTIONAL(>, std::greater)
+COMPARE_STRONG_FUNCTIONAL(<, std::less)
+COMPARE_STRONG_FUNCTIONAL(<=, std::less_equal)
+COMPARE_STRONG_FUNCTIONAL(>=, std::greater_equal)
+
+#undef COMPARE_STRONG
+#undef COMPARE_STRONG_FUNCTIONAL
+
+// For code size reasons, we do not want these inlined or templated.
+void sp_report_race();
+void sp_report_stack_pointer();
 
 // ---------------------------------------------------------------------------
 // No user serviceable parts below here.
 
+// Check whether address is definitely on the calling stack.  We actually check whether it is on
+// the same 4K page as the frame pointer.
+//
+// Assumptions:
+// - Pages are never smaller than 4K (MIN_PAGE_SIZE)
+// - Malloced memory never shares a page with a stack.
+//
+// It does not appear safe to broaden this check to include adjacent pages; apparently this code
+// is used in environments where there may not be a guard page below (at higher addresses than)
+// the bottom of the stack.
+//
+// TODO: Consider adding make_sp<T>() to allocate an object and wrap the resulting pointer safely
+// without checking overhead.
+template <typename T>
+void sp<T>::check_not_on_stack(const void* ptr) {
+    static constexpr int MIN_PAGE_SIZE = 0x1000;  // 4K. Safer than including sys/user.h.
+    static constexpr uintptr_t MIN_PAGE_MASK = ~static_cast<uintptr_t>(MIN_PAGE_SIZE - 1);
+    uintptr_t my_frame_address =
+            reinterpret_cast<uintptr_t>(__builtin_frame_address(0 /* this frame */));
+    if (((reinterpret_cast<uintptr_t>(ptr) ^ my_frame_address) & MIN_PAGE_MASK) == 0) {
+        sp_report_stack_pointer();
+    }
+}
+
 template<typename T>
 sp<T>::sp(T* other)
         : m_ptr(other) {
-    if (other)
+    if (other) {
+        check_not_on_stack(other);
         other->incStrong(this);
+    }
 }
 
 template<typename T>
@@ -159,8 +198,10 @@
 template<typename T> template<typename U>
 sp<T>::sp(U* other)
         : m_ptr(other) {
-    if (other)
+    if (other) {
+        check_not_on_stack(other);
         (static_cast<T*>(other))->incStrong(this);
+    }
 }
 
 template<typename T> template<typename U>
@@ -207,7 +248,10 @@
 template<typename T>
 sp<T>& sp<T>::operator =(T* other) {
     T* oldPtr(*const_cast<T* volatile*>(&m_ptr));
-    if (other) other->incStrong(this);
+    if (other) {
+        check_not_on_stack(other);
+        other->incStrong(this);
+    }
     if (oldPtr) oldPtr->decStrong(this);
     if (oldPtr != *const_cast<T* volatile*>(&m_ptr)) sp_report_race();
     m_ptr = other;
diff --git a/libutils/include/utils/Trace.h b/libutils/include/utils/Trace.h
index fec0ffa..9986bf5 100644
--- a/libutils/include/utils/Trace.h
+++ b/libutils/include/utils/Trace.h
@@ -33,7 +33,7 @@
 // ATRACE_NAME traces from its location until the end of its enclosing scope.
 #define _PASTE(x, y) x ## y
 #define PASTE(x, y) _PASTE(x,y)
-#define ATRACE_NAME(name) android::ScopedTrace PASTE(___tracer, __LINE__) (ATRACE_TAG, name)
+#define ATRACE_NAME(name) ::android::ScopedTrace PASTE(___tracer, __LINE__)(ATRACE_TAG, name)
 
 // ATRACE_CALL is an ATRACE_NAME that uses the current function name.
 #define ATRACE_CALL() ATRACE_NAME(__FUNCTION__)
diff --git a/libvndksupport/Android.bp b/libvndksupport/Android.bp
index f4544a1..b92c76c 100644
--- a/libvndksupport/Android.bp
+++ b/libvndksupport/Android.bp
@@ -1,5 +1,3 @@
-subdirs = ["tests"]
-
 cc_library {
     name: "libvndksupport",
     native_bridge_supported: true,
diff --git a/libvndksupport/libvndksupport.map.txt b/libvndksupport/libvndksupport.map.txt
index ac9a99c..a44ed18 100644
--- a/libvndksupport/libvndksupport.map.txt
+++ b/libvndksupport/libvndksupport.map.txt
@@ -1,8 +1,8 @@
 LIBVNDKSUPPORT {
   global:
-    android_is_in_vendor_process; # vndk apex
-    android_load_sphal_library; # vndk apex
-    android_unload_sphal_library; # vndk apex
+    android_is_in_vendor_process; # llndk apex
+    android_load_sphal_library; # llndk apex
+    android_unload_sphal_library; # llndk apex
   local:
     *;
 };
diff --git a/libvndksupport/linker.cpp b/libvndksupport/linker.cpp
index cf0f618..30b9c2e 100644
--- a/libvndksupport/linker.cpp
+++ b/libvndksupport/linker.cpp
@@ -26,9 +26,7 @@
 
 #include <initializer_list>
 
-__attribute__((weak)) extern "C" android_namespace_t* android_get_exported_namespace(const char*);
-__attribute__((weak)) extern "C" void* android_dlopen_ext(const char*, int,
-                                                          const android_dlextinfo*);
+extern "C" android_namespace_t* android_get_exported_namespace(const char*);
 
 namespace {
 
@@ -42,10 +40,8 @@
 static VendorNamespace get_vendor_namespace() {
     static VendorNamespace result = ([] {
         for (const char* name : {"sphal", "default"}) {
-            if (android_get_exported_namespace != nullptr) {
-                if (android_namespace_t* ns = android_get_exported_namespace(name)) {
-                    return VendorNamespace{ns, name};
-                }
+            if (android_namespace_t* ns = android_get_exported_namespace(name)) {
+                return VendorNamespace{ns, name};
             }
         }
         return VendorNamespace{};
@@ -59,10 +55,6 @@
     if (getpid() == 1) {
         return 0;
     }
-    if (android_get_exported_namespace == nullptr) {
-        ALOGD("android_get_exported_namespace() not available. Assuming system process.");
-        return 0;
-    }
 
     // In vendor process, 'vndk' namespace is not visible, whereas in system
     // process, it is.
@@ -76,10 +68,7 @@
                 .flags = ANDROID_DLEXT_USE_NAMESPACE,
                 .library_namespace = vendor_namespace.ptr,
         };
-        void* handle = nullptr;
-        if (android_dlopen_ext != nullptr) {
-            handle = android_dlopen_ext(name, flag, &dlextinfo);
-        }
+        void* handle = android_dlopen_ext(name, flag, &dlextinfo);
         if (!handle) {
             ALOGE("Could not load %s from %s namespace: %s.", name, vendor_namespace.name,
                   dlerror());
diff --git a/libziparchive/Android.bp b/libziparchive/Android.bp
index 0253f2f..1bbffaf 100644
--- a/libziparchive/Android.bp
+++ b/libziparchive/Android.bp
@@ -175,12 +175,38 @@
 }
 
 cc_binary {
-    name: "unzip",
+    name: "ziptool",
     defaults: ["libziparchive_flags"],
-    srcs: ["unzip.cpp"],
+    srcs: ["ziptool.cpp"],
     shared_libs: [
         "libbase",
         "libziparchive",
     ],
     recovery_available: true,
+    host_supported: true,
+    target: {
+        android: {
+            symlinks: ["unzip", "zipinfo"],
+        },
+    },
+}
+
+cc_fuzz {
+    name: "libziparchive_fuzzer",
+    srcs: ["libziparchive_fuzzer.cpp"],
+    static_libs: ["libziparchive", "libbase", "libz", "liblog"],
+    host_supported: true,
+    corpus: ["testdata/*"],
+}
+
+sh_test {
+    name: "ziptool-tests",
+    src: "run-ziptool-tests-on-android.sh",
+    filename: "run-ziptool-tests-on-android.sh",
+    test_suites: ["general-tests"],
+    host_supported: true,
+    device_supported: false,
+    test_config: "ziptool-tests.xml",
+    data: ["cli-tests/**/*"],
+    target_required: ["cli-test", "ziptool"],
 }
diff --git a/libziparchive/cli-tests/files/example.zip b/libziparchive/cli-tests/files/example.zip
new file mode 100644
index 0000000..c3292e9
--- /dev/null
+++ b/libziparchive/cli-tests/files/example.zip
Binary files differ
diff --git a/libziparchive/cli-tests/unzip.test b/libziparchive/cli-tests/unzip.test
new file mode 100755
index 0000000..6e5cbf2
--- /dev/null
+++ b/libziparchive/cli-tests/unzip.test
@@ -0,0 +1,148 @@
+# unzip tests.
+
+# Note: since "master key", Android uses libziparchive for all zip file
+# handling, and that scans the whole central directory immediately. Not only
+# lookups by name but also iteration is implemented using the resulting hash
+# table, meaning that any test that makes assumptions about iteration order
+# will fail on Android.
+
+name: unzip -l
+command: unzip -l $FILES/example.zip d1/d2/x.txt
+after: [ ! -f d1/d2/x.txt ]
+expected-stdout:
+	Archive:  $FILES/example.zip
+	  Length      Date    Time    Name
+	---------  ---------- -----   ----
+	     1024  2017-06-04 08:45   d1/d2/x.txt
+	---------                     -------
+	     1024                     1 file
+---
+
+name: unzip -lq
+command: unzip -lq $FILES/example.zip d1/d2/x.txt
+after: [ ! -f d1/d2/x.txt ]
+expected-stdout:
+	  Length      Date    Time    Name
+	---------  ---------- -----   ----
+	     1024  2017-06-04 08:45   d1/d2/x.txt
+	---------                     -------
+	     1024                     1 file
+---
+
+name: unzip -lv
+command: unzip -lv $FILES/example.zip d1/d2/x.txt
+after: [ ! -f d1/d2/file ]
+expected-stdout:
+	Archive:  $FILES/example.zip
+	 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
+	--------  ------  ------- ---- ---------- ----- --------  ----
+	    1024  Defl:N       11  99% 2017-06-04 08:45 48d7f063  d1/d2/x.txt
+	--------          -------  ---                            -------
+	    1024               11  99%                            1 file
+---
+
+name: unzip -v
+command: unzip -v $FILES/example.zip d1/d2/x.txt
+after: [ ! -f d1/d2/file ]
+expected-stdout:
+	Archive:  $FILES/example.zip
+	 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
+	--------  ------  ------- ---- ---------- ----- --------  ----
+	    1024  Defl:N       11  99% 2017-06-04 08:45 48d7f063  d1/d2/x.txt
+	--------          -------  ---                            -------
+	    1024               11  99%                            1 file
+---
+
+name: unzip one file
+command: unzip -q $FILES/example.zip d1/d2/a.txt && cat d1/d2/a.txt
+after: [ ! -f d1/d2/b.txt ]
+expected-stdout:
+	a
+---
+
+name: unzip all files
+command: unzip -q $FILES/example.zip
+after: [ -f d1/d2/a.txt ]
+after: [ -f d1/d2/b.txt ]
+after: [ -f d1/d2/c.txt ]
+after: [ -f d1/d2/empty.txt ]
+after: [ -f d1/d2/x.txt ]
+after: [ -d d1/d2/dir ]
+expected-stdout:
+---
+
+name: unzip -o
+before: mkdir -p d1/d2
+before: echo b > d1/d2/a.txt
+command: unzip -q -o $FILES/example.zip d1/d2/a.txt && cat d1/d2/a.txt
+expected-stdout:
+	a
+---
+
+name: unzip -n
+before: mkdir -p d1/d2
+before: echo b > d1/d2/a.txt
+command: unzip -q -n $FILES/example.zip d1/d2/a.txt && cat d1/d2/a.txt
+expected-stdout:
+	b
+---
+
+# The reference implementation will create *one* level of missing directories,
+# so this succeeds.
+name: unzip -d shallow non-existent
+command: unzip -q -d will-be-created $FILES/example.zip d1/d2/a.txt
+after: [ -d will-be-created ]
+after: [ -f will-be-created/d1/d2/a.txt ]
+---
+
+# The reference implementation will *only* create one level of missing
+# directories, so this fails.
+name: unzip -d deep non-existent
+command: unzip -q -d oh-no/will-not-be-created $FILES/example.zip d1/d2/a.txt 2> stderr ; echo $? > status
+after: [ ! -d oh-no ]
+after: [ ! -d oh-no/will-not-be-created ]
+after: [ ! -f oh-no/will-not-be-created/d1/d2/a.txt ]
+after: grep -q "oh-no/will-not-be-created" stderr
+after: grep -q "No such file or directory" stderr
+# The reference implementation has *lots* of non-zero exit values, but we stick to 0 and 1.
+after: [ $(cat status) -gt 0 ]
+---
+
+name: unzip -d exists
+before: mkdir dir
+command: unzip -q -d dir $FILES/example.zip d1/d2/a.txt && cat dir/d1/d2/a.txt
+after: [ ! -f d1/d2/a.txt ]
+expected-stdout:
+	a
+---
+
+name: unzip -p
+command: unzip -p $FILES/example.zip d1/d2/a.txt
+after: [ ! -f d1/d2/a.txt ]
+expected-stdout:
+	a
+---
+
+name: unzip -x FILE...
+# Note: the RI ignores -x DIR for some reason, but it's not obvious we should.
+command: unzip -q $FILES/example.zip -x d1/d2/a.txt d1/d2/b.txt d1/d2/empty.txt d1/d2/x.txt && cat d1/d2/c.txt
+after: [ ! -f d1/d2/a.txt ]
+after: [ ! -f d1/d2/b.txt ]
+after: [ ! -f d1/d2/empty.txt ]
+after: [ ! -f d1/d2/x.txt ]
+after: [ -d d1/d2/dir ]
+expected-stdout:
+	ccc
+---
+
+name: unzip FILE -x FILE...
+command: unzip -q $FILES/example.zip d1/d2/a.txt d1/d2/b.txt -x d1/d2/a.txt && cat d1/d2/b.txt
+after: [ ! -f d1/d2/a.txt ]
+after: [ -f d1/d2/b.txt ]
+after: [ ! -f d1/d2/c.txt ]
+after: [ ! -f d1/d2/empty.txt ]
+after: [ ! -f d1/d2/x.txt ]
+after: [ ! -d d1/d2/dir ]
+expected-stdout:
+	bb
+---
diff --git a/libziparchive/cli-tests/zipinfo.test b/libziparchive/cli-tests/zipinfo.test
new file mode 100755
index 0000000..d5bce1c
--- /dev/null
+++ b/libziparchive/cli-tests/zipinfo.test
@@ -0,0 +1,53 @@
+# zipinfo tests.
+
+# Note: since "master key", Android uses libziparchive for all zip file
+# handling, and that scans the whole central directory immediately. Not only
+# lookups by name but also iteration is implemented using the resulting hash
+# table, meaning that any test that makes assumptions about iteration order
+# will fail on Android.
+
+name: zipinfo -1
+command: zipinfo -1 $FILES/example.zip | sort
+expected-stdout:
+	d1/
+	d1/d2/a.txt
+	d1/d2/b.txt
+	d1/d2/c.txt
+	d1/d2/dir/
+	d1/d2/empty.txt
+	d1/d2/x.txt
+---
+
+name: zipinfo header
+command: zipinfo $FILES/example.zip | head -2
+expected-stdout:
+	Archive:  $FILES/example.zip
+	Zip file size: 1082 bytes, number of entries: 7
+---
+
+name: zipinfo footer
+command: zipinfo $FILES/example.zip | tail -1
+expected-stdout:
+	7 files, 1033 bytes uncompressed, 20 bytes compressed:  98.1%
+---
+
+name: zipinfo directory
+# The RI doesn't use ISO dates.
+command: zipinfo $FILES/example.zip d1/ | sed s/17-Jun-/2017-06-/
+expected-stdout:
+	drwxr-x---  3.0 unx        0 bx stor 2017-06-04 08:40 d1/
+---
+
+name: zipinfo stored
+# The RI doesn't use ISO dates.
+command: zipinfo $FILES/example.zip d1/d2/empty.txt | sed s/17-Jun-/2017-06-/
+expected-stdout:
+	-rw-r-----  3.0 unx        0 bx stor 2017-06-04 08:43 d1/d2/empty.txt
+---
+
+name: zipinfo deflated
+# The RI doesn't use ISO dates.
+command: zipinfo $FILES/example.zip d1/d2/x.txt | sed s/17-Jun-/2017-06-/
+expected-stdout:
+	-rw-r-----  3.0 unx     1024 tx defN 2017-06-04 08:45 d1/d2/x.txt
+---
diff --git a/libziparchive/include/ziparchive/zip_archive.h b/libziparchive/include/ziparchive/zip_archive.h
index e3ac114..047af90 100644
--- a/libziparchive/include/ziparchive/zip_archive.h
+++ b/libziparchive/include/ziparchive/zip_archive.h
@@ -40,8 +40,8 @@
  * Represents information about a zip entry in a zip file.
  */
 struct ZipEntry {
-  // Compression method: One of kCompressStored or
-  // kCompressDeflated.
+  // Compression method. One of kCompressStored or kCompressDeflated.
+  // See also `gpbf` for deflate subtypes.
   uint16_t method;
 
   // Modification time. The zipfile format specifies
@@ -55,7 +55,7 @@
   struct tm GetModificationTime() const;
 
   // Suggested Unix mode for this entry, from the zip archive if created on
-  // Unix, or a default otherwise.
+  // Unix, or a default otherwise. See also `external_file_attributes`.
   mode_t unix_mode;
 
   // 1 if this entry contains a data descriptor segment, 0
@@ -79,6 +79,18 @@
 
   // The offset to the start of data for this ZipEntry.
   off64_t offset;
+
+  // The version of zip and the host file system this came from (for zipinfo).
+  uint16_t version_made_by;
+
+  // The raw attributes, whose interpretation depends on the host
+  // file system in `version_made_by` (for zipinfo). See also `unix_mode`.
+  uint32_t external_file_attributes;
+
+  // Specifics about the deflation (for zipinfo).
+  uint16_t gpbf;
+  // Whether this entry is believed to be text or binary (for zipinfo).
+  bool is_text;
 };
 
 struct ZipArchive;
@@ -114,7 +126,7 @@
 int32_t OpenArchiveFd(const int fd, const char* debugFileName, ZipArchiveHandle* handle,
                       bool assume_ownership = true);
 
-int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debugFileName,
+int32_t OpenArchiveFromMemory(const void* address, size_t length, const char* debugFileName,
                               ZipArchiveHandle* handle);
 /*
  * Close archive, releasing resources associated with it. This will
@@ -125,6 +137,19 @@
  */
 void CloseArchive(ZipArchiveHandle archive);
 
+/** See GetArchiveInfo(). */
+struct ZipArchiveInfo {
+  /** The size in bytes of the archive itself. Used by zipinfo. */
+  off64_t archive_size;
+  /** The number of entries in the archive. */
+  size_t entry_count;
+};
+
+/**
+ * Returns information about the given archive.
+ */
+ZipArchiveInfo GetArchiveInfo(ZipArchiveHandle archive);
+
 /*
  * Find an entry in the Zip archive, by name. |data| must be non-null.
  *
diff --git a/libziparchive/libziparchive_fuzzer.cpp b/libziparchive/libziparchive_fuzzer.cpp
new file mode 100644
index 0000000..75e7939
--- /dev/null
+++ b/libziparchive/libziparchive_fuzzer.cpp
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <ziparchive/zip_archive.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  ZipArchiveHandle handle = nullptr;
+  OpenArchiveFromMemory(data, size, "fuzz", &handle);
+  CloseArchive(handle);
+  return 0;
+}
diff --git a/libziparchive/run-ziptool-tests-on-android.sh b/libziparchive/run-ziptool-tests-on-android.sh
new file mode 100755
index 0000000..3c23d43
--- /dev/null
+++ b/libziparchive/run-ziptool-tests-on-android.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Copy the tests across.
+adb shell rm -rf /data/local/tmp/ziptool-tests/
+adb shell mkdir /data/local/tmp/ziptool-tests/
+adb push cli-tests/ /data/local/tmp/ziptool-tests/
+#adb push cli-test /data/local/tmp/ziptool-tests/
+
+if tty -s; then
+  dash_t="-t"
+else
+  dash_t=""
+fi
+
+exec adb shell $dash_t cli-test /data/local/tmp/ziptool-tests/cli-tests/*.test
diff --git a/libziparchive/testdata/empty.zip b/libziparchive/testdata/empty.zip
new file mode 100644
index 0000000..15cb0ec
--- /dev/null
+++ b/libziparchive/testdata/empty.zip
Binary files differ
diff --git a/libziparchive/testdata/zero-size-cd.zip b/libziparchive/testdata/zero-size-cd.zip
new file mode 100644
index 0000000..b6c8cbe
--- /dev/null
+++ b/libziparchive/testdata/zero-size-cd.zip
Binary files differ
diff --git a/libziparchive/unzip.cpp b/libziparchive/unzip.cpp
deleted file mode 100644
index 426325e..0000000
--- a/libziparchive/unzip.cpp
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <error.h>
-#include <fcntl.h>
-#include <fnmatch.h>
-#include <getopt.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <set>
-#include <string>
-
-#include <android-base/file.h>
-#include <android-base/strings.h>
-#include <ziparchive/zip_archive.h>
-
-enum OverwriteMode {
-  kAlways,
-  kNever,
-  kPrompt,
-};
-
-static OverwriteMode overwrite_mode = kPrompt;
-static const char* flag_d = nullptr;
-static bool flag_l = false;
-static bool flag_p = false;
-static bool flag_q = false;
-static bool flag_v = false;
-static const char* archive_name = nullptr;
-static std::set<std::string> includes;
-static std::set<std::string> excludes;
-static uint64_t total_uncompressed_length = 0;
-static uint64_t total_compressed_length = 0;
-static size_t file_count = 0;
-
-static bool ShouldInclude(const std::string& name) {
-  // Explicitly excluded?
-  if (!excludes.empty()) {
-    for (const auto& exclude : excludes) {
-      if (!fnmatch(exclude.c_str(), name.c_str(), 0)) return false;
-    }
-  }
-
-  // Implicitly included?
-  if (includes.empty()) return true;
-
-  // Explicitly included?
-  for (const auto& include : includes) {
-    if (!fnmatch(include.c_str(), name.c_str(), 0)) return true;
-  }
-  return false;
-}
-
-static bool MakeDirectoryHierarchy(const std::string& path) {
-  // stat rather than lstat because a symbolic link to a directory is fine too.
-  struct stat sb;
-  if (stat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode)) return true;
-
-  // Ensure the parent directories exist first.
-  if (!MakeDirectoryHierarchy(android::base::Dirname(path))) return false;
-
-  // Then try to create this directory.
-  return (mkdir(path.c_str(), 0777) != -1);
-}
-
-static int CompressionRatio(int64_t uncompressed, int64_t compressed) {
-  if (uncompressed == 0) return 0;
-  return static_cast<int>((100LL * (uncompressed - compressed)) / uncompressed);
-}
-
-static void MaybeShowHeader() {
-  if (!flag_q) printf("Archive:  %s\n", archive_name);
-  if (flag_v) {
-    printf(
-        " Length   Method    Size  Cmpr    Date    Time   CRC-32   Name\n"
-        "--------  ------  ------- ---- ---------- ----- --------  ----\n");
-  } else if (flag_l) {
-    printf(
-        "  Length      Date    Time    Name\n"
-        "---------  ---------- -----   ----\n");
-  }
-}
-
-static void MaybeShowFooter() {
-  if (flag_v) {
-    printf(
-        "--------          -------  ---                            -------\n"
-        "%8" PRId64 "         %8" PRId64 " %3d%%                            %zu file%s\n",
-        total_uncompressed_length, total_compressed_length,
-        CompressionRatio(total_uncompressed_length, total_compressed_length), file_count,
-        (file_count == 1) ? "" : "s");
-  } else if (flag_l) {
-    printf(
-        "---------                     -------\n"
-        "%9" PRId64 "                     %zu file%s\n",
-        total_uncompressed_length, file_count, (file_count == 1) ? "" : "s");
-  }
-}
-
-static bool PromptOverwrite(const std::string& dst) {
-  // TODO: [r]ename not implemented because it doesn't seem useful.
-  printf("replace %s? [y]es, [n]o, [A]ll, [N]one: ", dst.c_str());
-  fflush(stdout);
-  while (true) {
-    char* line = nullptr;
-    size_t n;
-    if (getline(&line, &n, stdin) == -1) {
-      error(1, 0, "(EOF/read error; assuming [N]one...)");
-      overwrite_mode = kNever;
-      return false;
-    }
-    if (n == 0) continue;
-    char cmd = line[0];
-    free(line);
-    switch (cmd) {
-      case 'y':
-        return true;
-      case 'n':
-        return false;
-      case 'A':
-        overwrite_mode = kAlways;
-        return true;
-      case 'N':
-        overwrite_mode = kNever;
-        return false;
-    }
-  }
-}
-
-static void ExtractToPipe(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
-  // We need to extract to memory because ExtractEntryToFile insists on
-  // being able to seek and truncate, and you can't do that with stdout.
-  uint8_t* buffer = new uint8_t[entry.uncompressed_length];
-  int err = ExtractToMemory(zah, &entry, buffer, entry.uncompressed_length);
-  if (err < 0) {
-    error(1, 0, "failed to extract %s: %s", name.c_str(), ErrorCodeString(err));
-  }
-  if (!android::base::WriteFully(1, buffer, entry.uncompressed_length)) {
-    error(1, errno, "failed to write %s to stdout", name.c_str());
-  }
-  delete[] buffer;
-}
-
-static void ExtractOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
-  // Bad filename?
-  if (android::base::StartsWith(name, "/") || android::base::StartsWith(name, "../") ||
-      name.find("/../") != std::string::npos) {
-    error(1, 0, "bad filename %s", name.c_str());
-  }
-
-  // Where are we actually extracting to (for human-readable output)?
-  std::string dst;
-  if (flag_d) {
-    dst = flag_d;
-    if (!android::base::EndsWith(dst, "/")) dst += '/';
-  }
-  dst += name;
-
-  // Ensure the directory hierarchy exists.
-  if (!MakeDirectoryHierarchy(android::base::Dirname(name))) {
-    error(1, errno, "couldn't create directory hierarchy for %s", dst.c_str());
-  }
-
-  // An entry in a zip file can just be a directory itself.
-  if (android::base::EndsWith(name, "/")) {
-    if (mkdir(name.c_str(), entry.unix_mode) == -1) {
-      // If the directory already exists, that's fine.
-      if (errno == EEXIST) {
-        struct stat sb;
-        if (stat(name.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode)) return;
-      }
-      error(1, errno, "couldn't extract directory %s", dst.c_str());
-    }
-    return;
-  }
-
-  // Create the file.
-  int fd = open(name.c_str(), O_CREAT | O_WRONLY | O_CLOEXEC | O_EXCL, entry.unix_mode);
-  if (fd == -1 && errno == EEXIST) {
-    if (overwrite_mode == kNever) return;
-    if (overwrite_mode == kPrompt && !PromptOverwrite(dst)) return;
-    // Either overwrite_mode is kAlways or the user consented to this specific case.
-    fd = open(name.c_str(), O_WRONLY | O_CREAT | O_CLOEXEC | O_TRUNC, entry.unix_mode);
-  }
-  if (fd == -1) error(1, errno, "couldn't create file %s", dst.c_str());
-
-  // Actually extract into the file.
-  if (!flag_q) printf("  inflating: %s\n", dst.c_str());
-  int err = ExtractEntryToFile(zah, &entry, fd);
-  if (err < 0) error(1, 0, "failed to extract %s: %s", dst.c_str(), ErrorCodeString(err));
-  close(fd);
-}
-
-static void ListOne(const ZipEntry& entry, const std::string& name) {
-  tm t = entry.GetModificationTime();
-  char time[32];
-  snprintf(time, sizeof(time), "%04d-%02d-%02d %02d:%02d", t.tm_year + 1900, t.tm_mon + 1,
-           t.tm_mday, t.tm_hour, t.tm_min);
-  if (flag_v) {
-    printf("%8d  %s  %7d %3d%% %s %08x  %s\n", entry.uncompressed_length,
-           (entry.method == kCompressStored) ? "Stored" : "Defl:N", entry.compressed_length,
-           CompressionRatio(entry.uncompressed_length, entry.compressed_length), time, entry.crc32,
-           name.c_str());
-  } else {
-    printf("%9d  %s   %s\n", entry.uncompressed_length, time, name.c_str());
-  }
-}
-
-static void ProcessOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
-  if (flag_l || flag_v) {
-    // -l or -lv or -lq or -v.
-    ListOne(entry, name);
-  } else {
-    // Actually extract.
-    if (flag_p) {
-      ExtractToPipe(zah, entry, name);
-    } else {
-      ExtractOne(zah, entry, name);
-    }
-  }
-  total_uncompressed_length += entry.uncompressed_length;
-  total_compressed_length += entry.compressed_length;
-  ++file_count;
-}
-
-static void ProcessAll(ZipArchiveHandle zah) {
-  MaybeShowHeader();
-
-  // libziparchive iteration order doesn't match the central directory.
-  // We could sort, but that would cost extra and wouldn't match either.
-  void* cookie;
-  int err = StartIteration(zah, &cookie);
-  if (err != 0) {
-    error(1, 0, "couldn't iterate %s: %s", archive_name, ErrorCodeString(err));
-  }
-
-  ZipEntry entry;
-  std::string name;
-  while ((err = Next(cookie, &entry, &name)) >= 0) {
-    if (ShouldInclude(name)) ProcessOne(zah, entry, name);
-  }
-
-  if (err < -1) error(1, 0, "failed iterating %s: %s", archive_name, ErrorCodeString(err));
-  EndIteration(cookie);
-
-  MaybeShowFooter();
-}
-
-static void ShowHelp(bool full) {
-  fprintf(full ? stdout : stderr, "usage: unzip [-d DIR] [-lnopqv] ZIP [FILE...] [-x FILE...]\n");
-  if (!full) exit(EXIT_FAILURE);
-
-  printf(
-      "\n"
-      "Extract FILEs from ZIP archive. Default is all files. Both the include and\n"
-      "exclude (-x) lists use shell glob patterns.\n"
-      "\n"
-      "-d DIR	Extract into DIR\n"
-      "-l	List contents (-lq excludes archive name, -lv is verbose)\n"
-      "-n	Never overwrite files (default: prompt)\n"
-      "-o	Always overwrite files\n"
-      "-p	Pipe to stdout\n"
-      "-q	Quiet\n"
-      "-v	List contents verbosely\n"
-      "-x FILE	Exclude files\n");
-  exit(EXIT_SUCCESS);
-}
-
-int main(int argc, char* argv[]) {
-  static struct option opts[] = {
-      {"help", no_argument, 0, 'h'},
-  };
-  bool saw_x = false;
-  int opt;
-  while ((opt = getopt_long(argc, argv, "-d:hlnopqvx", opts, nullptr)) != -1) {
-    switch (opt) {
-      case 'd':
-        flag_d = optarg;
-        break;
-      case 'h':
-        ShowHelp(true);
-        break;
-      case 'l':
-        flag_l = true;
-        break;
-      case 'n':
-        overwrite_mode = kNever;
-        break;
-      case 'o':
-        overwrite_mode = kAlways;
-        break;
-      case 'p':
-        flag_p = flag_q = true;
-        break;
-      case 'q':
-        flag_q = true;
-        break;
-      case 'v':
-        flag_v = true;
-        break;
-      case 'x':
-        saw_x = true;
-        break;
-      case 1:
-        // -x swallows all following arguments, so we use '-' in the getopt
-        // string and collect files here.
-        if (!archive_name) {
-          archive_name = optarg;
-        } else if (saw_x) {
-          excludes.insert(optarg);
-        } else {
-          includes.insert(optarg);
-        }
-        break;
-      default:
-        ShowHelp(false);
-    }
-  }
-
-  if (!archive_name) error(1, 0, "missing archive filename");
-
-  // We can't support "-" to unzip from stdin because libziparchive relies on mmap.
-  ZipArchiveHandle zah;
-  int32_t err;
-  if ((err = OpenArchive(archive_name, &zah)) != 0) {
-    error(1, 0, "couldn't open %s: %s", archive_name, ErrorCodeString(err));
-  }
-
-  // Implement -d by changing into that directory.
-  // We'll create implicit directories based on paths in the zip file, but we
-  // require that the -d directory already exists.
-  if (flag_d && chdir(flag_d) == -1) error(1, errno, "couldn't chdir to %s", flag_d);
-
-  ProcessAll(zah);
-
-  CloseArchive(zah);
-  return 0;
-}
diff --git a/libziparchive/zip_archive.cc b/libziparchive/zip_archive.cc
index c95b035..68837cc 100644
--- a/libziparchive/zip_archive.cc
+++ b/libziparchive/zip_archive.cc
@@ -178,7 +178,7 @@
 #endif
 }
 
-ZipArchive::ZipArchive(void* address, size_t length)
+ZipArchive::ZipArchive(const void* address, size_t length)
     : mapped_zip(address, length),
       close_file(false),
       directory_offset(0),
@@ -265,14 +265,10 @@
   ALOGV("+++ num_entries=%" PRIu32 " dir_size=%" PRIu32 " dir_offset=%" PRIu32, eocd->num_records,
         eocd->cd_size, eocd->cd_start_offset);
 
-  /*
-   * It all looks good.  Create a mapping for the CD, and set the fields
-   * in archive.
-   */
-
+  // It all looks good.  Create a mapping for the CD, and set the fields
+  // in archive.
   if (!archive->InitializeCentralDirectory(static_cast<off64_t>(eocd->cd_start_offset),
                                            static_cast<size_t>(eocd->cd_size))) {
-    ALOGE("Zip: failed to intialize central directory.\n");
     return kMmapFailed;
   }
 
@@ -354,7 +350,7 @@
   if (archive->hash_table == nullptr) {
     ALOGW("Zip: unable to allocate the %u-entry hash_table, entry size: %zu",
           archive->hash_table_size, sizeof(ZipStringOffset));
-    return -1;
+    return kAllocationFailed;
   }
 
   /*
@@ -365,24 +361,25 @@
   const uint8_t* ptr = cd_ptr;
   for (uint16_t i = 0; i < num_entries; i++) {
     if (ptr > cd_end - sizeof(CentralDirectoryRecord)) {
-      ALOGW("Zip: ran off the end (at %" PRIu16 ")", i);
+      ALOGW("Zip: ran off the end (item #%" PRIu16 ", %zu bytes of central directory)", i,
+            cd_length);
 #if defined(__ANDROID__)
       android_errorWriteLog(0x534e4554, "36392138");
 #endif
-      return -1;
+      return kInvalidFile;
     }
 
     const CentralDirectoryRecord* cdr = reinterpret_cast<const CentralDirectoryRecord*>(ptr);
     if (cdr->record_signature != CentralDirectoryRecord::kSignature) {
       ALOGW("Zip: missed a central dir sig (at %" PRIu16 ")", i);
-      return -1;
+      return kInvalidFile;
     }
 
     const off64_t local_header_offset = cdr->local_file_header_offset;
     if (local_header_offset >= archive->directory_offset) {
       ALOGW("Zip: bad LFH offset %" PRId64 " at entry %" PRIu16,
             static_cast<int64_t>(local_header_offset), i);
-      return -1;
+      return kInvalidFile;
     }
 
     const uint16_t file_name_length = cdr->file_name_length;
@@ -394,12 +391,12 @@
       ALOGW("Zip: file name for entry %" PRIu16
             " exceeds the central directory range, file_name_length: %" PRIu16 ", cd_length: %zu",
             i, file_name_length, cd_length);
-      return -1;
+      return kInvalidEntryName;
     }
     // Check that file name is valid UTF-8 and doesn't contain NUL (U+0000) characters.
     if (!IsValidEntryName(file_name, file_name_length)) {
       ALOGW("Zip: invalid file name at entry %" PRIu16, i);
-      return -1;
+      return kInvalidEntryName;
     }
 
     // Add the CDE filename to the hash table.
@@ -414,7 +411,7 @@
     ptr += sizeof(CentralDirectoryRecord) + file_name_length + extra_length + comment_length;
     if ((ptr - cd_ptr) > static_cast<int64_t>(cd_length)) {
       ALOGW("Zip: bad CD advance (%tu vs %zu) at entry %" PRIu16, ptr - cd_ptr, cd_length, i);
-      return -1;
+      return kInvalidFile;
     }
   }
 
@@ -422,7 +419,7 @@
   if (!archive->mapped_zip.ReadAtOffset(reinterpret_cast<uint8_t*>(&lfh_start_bytes),
                                         sizeof(uint32_t), 0)) {
     ALOGW("Zip: Unable to read header for entry at offset == 0.");
-    return -1;
+    return kInvalidFile;
   }
 
   if (lfh_start_bytes != LocalFileHeader::kSignature) {
@@ -430,7 +427,7 @@
 #if defined(__ANDROID__)
     android_errorWriteLog(0x534e4554, "64211847");
 #endif
-    return -1;
+    return kInvalidFile;
   }
 
   ALOGV("+++ zip good scan %" PRIu16 " entries", num_entries);
@@ -439,16 +436,8 @@
 }
 
 static int32_t OpenArchiveInternal(ZipArchive* archive, const char* debug_file_name) {
-  int32_t result = -1;
-  if ((result = MapCentralDirectory(debug_file_name, archive)) != 0) {
-    return result;
-  }
-
-  if ((result = ParseZipArchive(archive))) {
-    return result;
-  }
-
-  return 0;
+  int32_t result = MapCentralDirectory(debug_file_name, archive);
+  return result != 0 ? result : ParseZipArchive(archive);
 }
 
 int32_t OpenArchiveFd(int fd, const char* debug_file_name, ZipArchiveHandle* handle,
@@ -471,13 +460,20 @@
   return OpenArchiveInternal(archive, fileName);
 }
 
-int32_t OpenArchiveFromMemory(void* address, size_t length, const char* debug_file_name,
+int32_t OpenArchiveFromMemory(const void* address, size_t length, const char* debug_file_name,
                               ZipArchiveHandle* handle) {
   ZipArchive* archive = new ZipArchive(address, length);
   *handle = archive;
   return OpenArchiveInternal(archive, debug_file_name);
 }
 
+ZipArchiveInfo GetArchiveInfo(ZipArchiveHandle archive) {
+  ZipArchiveInfo result;
+  result.archive_size = archive->mapped_zip.GetFileLength();
+  result.entry_count = archive->num_entries;
+  return result;
+}
+
 /*
  * Close a ZipArchive, closing the file and freeing the contents.
  */
@@ -614,12 +610,21 @@
   }
 
   // 4.4.2.1: the upper byte of `version_made_by` gives the source OS. Unix is 3.
-  if ((cdr->version_made_by >> 8) == 3) {
+  data->version_made_by = cdr->version_made_by;
+  data->external_file_attributes = cdr->external_file_attributes;
+  if ((data->version_made_by >> 8) == 3) {
     data->unix_mode = (cdr->external_file_attributes >> 16) & 0xffff;
   } else {
     data->unix_mode = 0777;
   }
 
+  // 4.4.4: general purpose bit flags.
+  data->gpbf = lfh->gpb_flags;
+
+  // 4.4.14: the lowest bit of the internal file attributes field indicates text.
+  // Currently only needed to implement zipinfo.
+  data->is_text = (cdr->internal_file_attributes & 1);
+
   // Check that the local file header name matches the declared
   // name in the central directory.
   if (lfh->file_name_length != nameLen) {
@@ -1152,7 +1157,7 @@
   return fd_;
 }
 
-void* MappedZipFile::GetBasePtr() const {
+const void* MappedZipFile::GetBasePtr() const {
   if (has_fd_) {
     ALOGW("Zip: MappedZipFile doesn't have a base pointer.");
     return nullptr;
@@ -1169,7 +1174,7 @@
     return result;
   } else {
     if (base_ptr_ == nullptr) {
-      ALOGE("Zip: invalid file map\n");
+      ALOGE("Zip: invalid file map");
       return -1;
     }
     return static_cast<off64_t>(data_length_);
@@ -1180,21 +1185,22 @@
 bool MappedZipFile::ReadAtOffset(uint8_t* buf, size_t len, off64_t off) const {
   if (has_fd_) {
     if (!android::base::ReadFullyAtOffset(fd_, buf, len, off)) {
-      ALOGE("Zip: failed to read at offset %" PRId64 "\n", off);
+      ALOGE("Zip: failed to read at offset %" PRId64, off);
       return false;
     }
   } else {
     if (off < 0 || off > static_cast<off64_t>(data_length_)) {
-      ALOGE("Zip: invalid offset: %" PRId64 ", data length: %" PRId64 "\n", off, data_length_);
+      ALOGE("Zip: invalid offset: %" PRId64 ", data length: %" PRId64, off, data_length_);
       return false;
     }
-    memcpy(buf, static_cast<uint8_t*>(base_ptr_) + off, len);
+    memcpy(buf, static_cast<const uint8_t*>(base_ptr_) + off, len);
   }
   return true;
 }
 
-void CentralDirectory::Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size) {
-  base_ptr_ = static_cast<uint8_t*>(map_base_ptr) + cd_start_offset;
+void CentralDirectory::Initialize(const void* map_base_ptr, off64_t cd_start_offset,
+                                  size_t cd_size) {
+  base_ptr_ = static_cast<const uint8_t*>(map_base_ptr) + cd_start_offset;
   length_ = cd_size;
 }
 
@@ -1202,13 +1208,17 @@
   if (mapped_zip.HasFd()) {
     directory_map = android::base::MappedFile::FromFd(mapped_zip.GetFileDescriptor(),
                                                       cd_start_offset, cd_size, PROT_READ);
-    if (!directory_map) return false;
+    if (!directory_map) {
+      ALOGE("Zip: failed to map central directory (offset %" PRId64 ", size %zu): %s",
+            cd_start_offset, cd_size, strerror(errno));
+      return false;
+    }
 
     CHECK_EQ(directory_map->size(), cd_size);
     central_directory.Initialize(directory_map->data(), 0 /*offset*/, cd_size);
   } else {
     if (mapped_zip.GetBasePtr() == nullptr) {
-      ALOGE("Zip: Failed to map central directory, bad mapped_zip base pointer\n");
+      ALOGE("Zip: Failed to map central directory, bad mapped_zip base pointer");
       return false;
     }
     if (static_cast<off64_t>(cd_start_offset) + static_cast<off64_t>(cd_size) >
diff --git a/libziparchive/zip_archive_private.h b/libziparchive/zip_archive_private.h
index 30a1d72..1d05fc7 100644
--- a/libziparchive/zip_archive_private.h
+++ b/libziparchive/zip_archive_private.h
@@ -42,6 +42,7 @@
     "Invalid entry name",
     "I/O error",
     "File mapping failed",
+    "Allocation failed",
 };
 
 enum ErrorCodes : int32_t {
@@ -87,7 +88,10 @@
   // We were not able to mmap the central directory or entry contents.
   kMmapFailed = -12,
 
-  kLastErrorCode = kMmapFailed,
+  // An allocation failed.
+  kAllocationFailed = -13,
+
+  kLastErrorCode = kAllocationFailed,
 };
 
 class MappedZipFile {
@@ -95,14 +99,14 @@
   explicit MappedZipFile(const int fd)
       : has_fd_(true), fd_(fd), base_ptr_(nullptr), data_length_(0) {}
 
-  explicit MappedZipFile(void* address, size_t length)
+  explicit MappedZipFile(const void* address, size_t length)
       : has_fd_(false), fd_(-1), base_ptr_(address), data_length_(static_cast<off64_t>(length)) {}
 
   bool HasFd() const { return has_fd_; }
 
   int GetFileDescriptor() const;
 
-  void* GetBasePtr() const;
+  const void* GetBasePtr() const;
 
   off64_t GetFileLength() const;
 
@@ -117,7 +121,7 @@
 
   const int fd_;
 
-  void* const base_ptr_;
+  const void* const base_ptr_;
   const off64_t data_length_;
 };
 
@@ -129,7 +133,7 @@
 
   size_t GetMapLength() const { return length_; }
 
-  void Initialize(void* map_base_ptr, off64_t cd_start_offset, size_t cd_size);
+  void Initialize(const void* map_base_ptr, off64_t cd_start_offset, size_t cd_size);
 
  private:
   const uint8_t* base_ptr_;
@@ -177,7 +181,7 @@
   ZipStringOffset* hash_table;
 
   ZipArchive(const int fd, bool assume_ownership);
-  ZipArchive(void* address, size_t length);
+  ZipArchive(const void* address, size_t length);
   ~ZipArchive();
 
   bool InitializeCentralDirectory(off64_t cd_start_offset, size_t cd_size);
diff --git a/libziparchive/zip_archive_test.cc b/libziparchive/zip_archive_test.cc
index 8781ab7..0916304 100644
--- a/libziparchive/zip_archive_test.cc
+++ b/libziparchive/zip_archive_test.cc
@@ -36,13 +36,9 @@
 
 static std::string test_data_dir = android::base::GetExecutableDirectory() + "/testdata";
 
-static const std::string kMissingZip = "missing.zip";
 static const std::string kValidZip = "valid.zip";
 static const std::string kLargeZip = "large.zip";
 static const std::string kBadCrcZip = "bad_crc.zip";
-static const std::string kCrashApk = "crash.apk";
-static const std::string kBadFilenameZip = "bad_filename.zip";
-static const std::string kUpdateZip = "dummy-update.zip";
 
 static const std::vector<uint8_t> kATxtContents{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'a',
                                                 'b', 'c', 'd', 'e', 'f', 'g', 'h', '\n'};
@@ -52,13 +48,6 @@
 
 static const std::vector<uint8_t> kBTxtContents{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', '\n'};
 
-static const std::string kATxtName("a.txt");
-static const std::string kBTxtName("b.txt");
-static const std::string kNonexistentTxtName("nonexistent.txt");
-static const std::string kEmptyTxtName("empty.txt");
-static const std::string kLargeCompressTxtName("compress.txt");
-static const std::string kLargeUncompressTxtName("uncompress.txt");
-
 static int32_t OpenArchiveWrapper(const std::string& name, ZipArchiveHandle* handle) {
   const std::string abs_path = test_data_dir + "/" + name;
   return OpenArchive(abs_path.c_str(), handle);
@@ -69,19 +58,31 @@
   ASSERT_EQ(0, OpenArchiveWrapper(kValidZip, &handle));
   CloseArchive(handle);
 
-  ASSERT_EQ(-1, OpenArchiveWrapper(kBadFilenameZip, &handle));
+  ASSERT_EQ(kInvalidEntryName, OpenArchiveWrapper("bad_filename.zip", &handle));
   CloseArchive(handle);
 }
 
 TEST(ziparchive, OutOfBound) {
   ZipArchiveHandle handle;
-  ASSERT_EQ(-8, OpenArchiveWrapper(kCrashApk, &handle));
+  ASSERT_EQ(kInvalidOffset, OpenArchiveWrapper("crash.apk", &handle));
+  CloseArchive(handle);
+}
+
+TEST(ziparchive, EmptyArchive) {
+  ZipArchiveHandle handle;
+  ASSERT_EQ(kEmptyArchive, OpenArchiveWrapper("empty.zip", &handle));
+  CloseArchive(handle);
+}
+
+TEST(ziparchive, ZeroSizeCentralDirectory) {
+  ZipArchiveHandle handle;
+  ASSERT_EQ(kInvalidFile, OpenArchiveWrapper("zero-size-cd.zip", &handle));
   CloseArchive(handle);
 }
 
 TEST(ziparchive, OpenMissing) {
   ZipArchiveHandle handle;
-  ASSERT_NE(0, OpenArchiveWrapper(kMissingZip, &handle));
+  ASSERT_NE(0, OpenArchiveWrapper("missing.zip", &handle));
 
   // Confirm the file descriptor is not going to be mistaken for a valid one.
   ASSERT_EQ(-1, GetFileDescriptor(handle));
@@ -200,7 +201,7 @@
   ASSERT_EQ(0, OpenArchiveWrapper(kValidZip, &handle));
 
   ZipEntry data;
-  ASSERT_EQ(0, FindEntry(handle, kATxtName, &data));
+  ASSERT_EQ(0, FindEntry(handle, "a.txt", &data));
 
   // Known facts about a.txt, from zipinfo -v.
   ASSERT_EQ(63, data.offset);
@@ -211,7 +212,7 @@
   ASSERT_EQ(static_cast<uint32_t>(0x438a8005), data.mod_time);
 
   // An entry that doesn't exist. Should be a negative return code.
-  ASSERT_LT(FindEntry(handle, kNonexistentTxtName, &data), 0);
+  ASSERT_LT(FindEntry(handle, "this file does not exist", &data), 0);
 
   CloseArchive(handle);
 }
@@ -259,7 +260,7 @@
 
   // An entry that's deflated.
   ZipEntry data;
-  ASSERT_EQ(0, FindEntry(handle, kATxtName, &data));
+  ASSERT_EQ(0, FindEntry(handle, "a.txt", &data));
   const uint32_t a_size = data.uncompressed_length;
   ASSERT_EQ(a_size, kATxtContents.size());
   uint8_t* buffer = new uint8_t[a_size];
@@ -268,7 +269,7 @@
   delete[] buffer;
 
   // An entry that's stored.
-  ASSERT_EQ(0, FindEntry(handle, kBTxtName, &data));
+  ASSERT_EQ(0, FindEntry(handle, "b.txt", &data));
   const uint32_t b_size = data.uncompressed_length;
   ASSERT_EQ(b_size, kBTxtContents.size());
   buffer = new uint8_t[b_size];
@@ -323,7 +324,7 @@
   ASSERT_EQ(0, OpenArchiveFd(tmp_file.fd, "EmptyEntriesTest", &handle, false));
 
   ZipEntry entry;
-  ASSERT_EQ(0, FindEntry(handle, kEmptyTxtName, &entry));
+  ASSERT_EQ(0, FindEntry(handle, "empty.txt", &entry));
   ASSERT_EQ(static_cast<uint32_t>(0), entry.uncompressed_length);
   uint8_t buffer[1];
   ASSERT_EQ(0, ExtractToMemory(handle, &entry, buffer, 1));
@@ -403,7 +404,7 @@
   ASSERT_EQ(0, OpenArchiveWrapper(kValidZip, &handle));
 
   ZipEntry entry;
-  ASSERT_EQ(0, FindEntry(handle, kATxtName, &entry));
+  ASSERT_EQ(0, FindEntry(handle, "a.txt", &entry));
   ASSERT_EQ(0, ExtractEntryToFile(handle, &entry, tmp_file.fd));
 
   // Assert that the first 8 bytes of the file haven't been clobbered.
@@ -425,7 +426,7 @@
 
 #if !defined(_WIN32)
 TEST(ziparchive, OpenFromMemory) {
-  const std::string zip_path = test_data_dir + "/" + kUpdateZip;
+  const std::string zip_path = test_data_dir + "/dummy-update.zip";
   android::base::unique_fd fd(open(zip_path.c_str(), O_RDONLY | O_BINARY));
   ASSERT_NE(-1, fd);
   struct stat sb;
@@ -510,27 +511,27 @@
 }
 
 TEST(ziparchive, StreamCompressed) {
-  ZipArchiveStreamTestUsingContents(kValidZip, kATxtName, kATxtContents, false);
+  ZipArchiveStreamTestUsingContents(kValidZip, "a.txt", kATxtContents, false);
 }
 
 TEST(ziparchive, StreamUncompressed) {
-  ZipArchiveStreamTestUsingContents(kValidZip, kBTxtName, kBTxtContents, false);
+  ZipArchiveStreamTestUsingContents(kValidZip, "b.txt", kBTxtContents, false);
 }
 
 TEST(ziparchive, StreamRawCompressed) {
-  ZipArchiveStreamTestUsingContents(kValidZip, kATxtName, kATxtContentsCompressed, true);
+  ZipArchiveStreamTestUsingContents(kValidZip, "a.txt", kATxtContentsCompressed, true);
 }
 
 TEST(ziparchive, StreamRawUncompressed) {
-  ZipArchiveStreamTestUsingContents(kValidZip, kBTxtName, kBTxtContents, true);
+  ZipArchiveStreamTestUsingContents(kValidZip, "b.txt", kBTxtContents, true);
 }
 
 TEST(ziparchive, StreamLargeCompressed) {
-  ZipArchiveStreamTestUsingMemory(kLargeZip, kLargeCompressTxtName);
+  ZipArchiveStreamTestUsingMemory(kLargeZip, "compress.txt");
 }
 
 TEST(ziparchive, StreamLargeUncompressed) {
-  ZipArchiveStreamTestUsingMemory(kLargeZip, kLargeUncompressTxtName);
+  ZipArchiveStreamTestUsingMemory(kLargeZip, "uncompress.txt");
 }
 
 TEST(ziparchive, StreamCompressedBadCrc) {
@@ -539,7 +540,7 @@
 
   ZipEntry entry;
   std::vector<uint8_t> read_data;
-  ZipArchiveStreamTest(handle, kATxtName, false, false, &entry, &read_data);
+  ZipArchiveStreamTest(handle, "a.txt", false, false, &entry, &read_data);
 
   CloseArchive(handle);
 }
@@ -550,7 +551,7 @@
 
   ZipEntry entry;
   std::vector<uint8_t> read_data;
-  ZipArchiveStreamTest(handle, kBTxtName, false, false, &entry, &read_data);
+  ZipArchiveStreamTest(handle, "b.txt", false, false, &entry, &read_data);
 
   CloseArchive(handle);
 }
@@ -647,7 +648,8 @@
 
   // Out of bounds.
   ASSERT_STREQ("Unknown return code", ErrorCodeString(1));
-  ASSERT_STREQ("Unknown return code", ErrorCodeString(-13));
+  ASSERT_STRNE("Unknown return code", ErrorCodeString(kLastErrorCode));
+  ASSERT_STREQ("Unknown return code", ErrorCodeString(kLastErrorCode - 1));
 
   ASSERT_STREQ("I/O error", ErrorCodeString(kIoError));
 }
@@ -698,7 +700,7 @@
   ASSERT_TRUE(android::base::WriteFully(tmp_file.fd, &kZipFileWithBrokenLfhSignature[0],
                                         kZipFileWithBrokenLfhSignature.size()));
   ZipArchiveHandle handle;
-  ASSERT_EQ(-1, OpenArchiveFd(tmp_file.fd, "LeadingNonZipBytes", &handle, false));
+  ASSERT_EQ(kInvalidFile, OpenArchiveFd(tmp_file.fd, "LeadingNonZipBytes", &handle, false));
 }
 
 class VectorReader : public zip_archive::Reader {
diff --git a/libziparchive/ziptool-tests.xml b/libziparchive/ziptool-tests.xml
new file mode 100644
index 0000000..211119f
--- /dev/null
+++ b/libziparchive/ziptool-tests.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+<configuration description="Config for running ziptool-tests through Atest or in Infra">
+    <option name="test-suite-tag" value="ziptool-tests" />
+    <!-- This test requires a device, so it's not annotated with a null-device. -->
+    <test class="com.android.tradefed.testtype.binary.ExecutableHostTest" >
+        <option name="binary" value="run-ziptool-tests-on-android.sh" />
+        <!-- Test script assumes a relative path with the cli-tests/ folders. -->
+        <option name="relative-path-execution" value="true" />
+        <!-- Tests shouldn't be that long but set 15m to be safe. -->
+        <option name="per-binary-timeout" value="15m" />
+    </test>
+</configuration>
diff --git a/libziparchive/ziptool.cpp b/libziparchive/ziptool.cpp
new file mode 100644
index 0000000..dd42e90
--- /dev/null
+++ b/libziparchive/ziptool.cpp
@@ -0,0 +1,528 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <getopt.h>
+#include <inttypes.h>
+#include <libgen.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <set>
+#include <string>
+
+#include <android-base/file.h>
+#include <android-base/strings.h>
+#include <ziparchive/zip_archive.h>
+
+using android::base::EndsWith;
+using android::base::StartsWith;
+
+enum OverwriteMode {
+  kAlways,
+  kNever,
+  kPrompt,
+};
+
+enum Role {
+  kUnzip,
+  kZipinfo,
+};
+
+static Role role;
+static OverwriteMode overwrite_mode = kPrompt;
+static bool flag_1 = false;
+static std::string flag_d;
+static bool flag_l = false;
+static bool flag_p = false;
+static bool flag_q = false;
+static bool flag_v = false;
+static bool flag_x = false;
+static const char* archive_name = nullptr;
+static std::set<std::string> includes;
+static std::set<std::string> excludes;
+static uint64_t total_uncompressed_length = 0;
+static uint64_t total_compressed_length = 0;
+static size_t file_count = 0;
+
+static const char* g_progname;
+
+static void die(int error, const char* fmt, ...) {
+  va_list ap;
+
+  va_start(ap, fmt);
+  fprintf(stderr, "%s: ", g_progname);
+  vfprintf(stderr, fmt, ap);
+  if (error != 0) fprintf(stderr, ": %s", strerror(error));
+  fprintf(stderr, "\n");
+  va_end(ap);
+  exit(1);
+}
+
+static bool ShouldInclude(const std::string& name) {
+  // Explicitly excluded?
+  if (!excludes.empty()) {
+    for (const auto& exclude : excludes) {
+      if (!fnmatch(exclude.c_str(), name.c_str(), 0)) return false;
+    }
+  }
+
+  // Implicitly included?
+  if (includes.empty()) return true;
+
+  // Explicitly included?
+  for (const auto& include : includes) {
+    if (!fnmatch(include.c_str(), name.c_str(), 0)) return true;
+  }
+  return false;
+}
+
+static bool MakeDirectoryHierarchy(const std::string& path) {
+  // stat rather than lstat because a symbolic link to a directory is fine too.
+  struct stat sb;
+  if (stat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode)) return true;
+
+  // Ensure the parent directories exist first.
+  if (!MakeDirectoryHierarchy(android::base::Dirname(path))) return false;
+
+  // Then try to create this directory.
+  return (mkdir(path.c_str(), 0777) != -1);
+}
+
+static float CompressionRatio(int64_t uncompressed, int64_t compressed) {
+  if (uncompressed == 0) return 0;
+  return static_cast<float>(100LL * (uncompressed - compressed)) /
+         static_cast<float>(uncompressed);
+}
+
+static void MaybeShowHeader(ZipArchiveHandle zah) {
+  if (role == kUnzip) {
+    // unzip has three formats.
+    if (!flag_q) printf("Archive:  %s\n", archive_name);
+    if (flag_v) {
+      printf(
+          " Length   Method    Size  Cmpr    Date    Time   CRC-32   Name\n"
+          "--------  ------  ------- ---- ---------- ----- --------  ----\n");
+    } else if (flag_l) {
+      printf(
+          "  Length      Date    Time    Name\n"
+          "---------  ---------- -----   ----\n");
+    }
+  } else {
+    // zipinfo.
+    if (!flag_1 && includes.empty() && excludes.empty()) {
+      ZipArchiveInfo info{GetArchiveInfo(zah)};
+      printf("Archive:  %s\n", archive_name);
+      printf("Zip file size: %" PRId64 " bytes, number of entries: %zu\n", info.archive_size,
+             info.entry_count);
+    }
+  }
+}
+
+static void MaybeShowFooter() {
+  if (role == kUnzip) {
+    if (flag_v) {
+      printf(
+          "--------          -------  ---                            -------\n"
+          "%8" PRId64 "         %8" PRId64 " %3.0f%%                            %zu file%s\n",
+          total_uncompressed_length, total_compressed_length,
+          CompressionRatio(total_uncompressed_length, total_compressed_length), file_count,
+          (file_count == 1) ? "" : "s");
+    } else if (flag_l) {
+      printf(
+          "---------                     -------\n"
+          "%9" PRId64 "                     %zu file%s\n",
+          total_uncompressed_length, file_count, (file_count == 1) ? "" : "s");
+    }
+  } else {
+    if (!flag_1 && includes.empty() && excludes.empty()) {
+      printf("%zu files, %" PRId64 " bytes uncompressed, %" PRId64 " bytes compressed:  %.1f%%\n",
+             file_count, total_uncompressed_length, total_compressed_length,
+             CompressionRatio(total_uncompressed_length, total_compressed_length));
+    }
+  }
+}
+
+static bool PromptOverwrite(const std::string& dst) {
+  // TODO: [r]ename not implemented because it doesn't seem useful.
+  printf("replace %s? [y]es, [n]o, [A]ll, [N]one: ", dst.c_str());
+  fflush(stdout);
+  while (true) {
+    char* line = nullptr;
+    size_t n;
+    if (getline(&line, &n, stdin) == -1) {
+      die(0, "(EOF/read error; assuming [N]one...)");
+      overwrite_mode = kNever;
+      return false;
+    }
+    if (n == 0) continue;
+    char cmd = line[0];
+    free(line);
+    switch (cmd) {
+      case 'y':
+        return true;
+      case 'n':
+        return false;
+      case 'A':
+        overwrite_mode = kAlways;
+        return true;
+      case 'N':
+        overwrite_mode = kNever;
+        return false;
+    }
+  }
+}
+
+static void ExtractToPipe(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
+  // We need to extract to memory because ExtractEntryToFile insists on
+  // being able to seek and truncate, and you can't do that with stdout.
+  uint8_t* buffer = new uint8_t[entry.uncompressed_length];
+  int err = ExtractToMemory(zah, &entry, buffer, entry.uncompressed_length);
+  if (err < 0) {
+    die(0, "failed to extract %s: %s", name.c_str(), ErrorCodeString(err));
+  }
+  if (!android::base::WriteFully(1, buffer, entry.uncompressed_length)) {
+    die(errno, "failed to write %s to stdout", name.c_str());
+  }
+  delete[] buffer;
+}
+
+static void ExtractOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
+  // Bad filename?
+  if (StartsWith(name, "/") || StartsWith(name, "../") || name.find("/../") != std::string::npos) {
+    die(0, "bad filename %s", name.c_str());
+  }
+
+  // Where are we actually extracting to (for human-readable output)?
+  // flag_d is the empty string if -d wasn't used, or has a trailing '/'
+  // otherwise.
+  std::string dst = flag_d + name;
+
+  // Ensure the directory hierarchy exists.
+  if (!MakeDirectoryHierarchy(android::base::Dirname(name))) {
+    die(errno, "couldn't create directory hierarchy for %s", dst.c_str());
+  }
+
+  // An entry in a zip file can just be a directory itself.
+  if (EndsWith(name, "/")) {
+    if (mkdir(name.c_str(), entry.unix_mode) == -1) {
+      // If the directory already exists, that's fine.
+      if (errno == EEXIST) {
+        struct stat sb;
+        if (stat(name.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode)) return;
+      }
+      die(errno, "couldn't extract directory %s", dst.c_str());
+    }
+    return;
+  }
+
+  // Create the file.
+  int fd = open(name.c_str(), O_CREAT | O_WRONLY | O_CLOEXEC | O_EXCL, entry.unix_mode);
+  if (fd == -1 && errno == EEXIST) {
+    if (overwrite_mode == kNever) return;
+    if (overwrite_mode == kPrompt && !PromptOverwrite(dst)) return;
+    // Either overwrite_mode is kAlways or the user consented to this specific case.
+    fd = open(name.c_str(), O_WRONLY | O_CREAT | O_CLOEXEC | O_TRUNC, entry.unix_mode);
+  }
+  if (fd == -1) die(errno, "couldn't create file %s", dst.c_str());
+
+  // Actually extract into the file.
+  if (!flag_q) printf("  inflating: %s\n", dst.c_str());
+  int err = ExtractEntryToFile(zah, &entry, fd);
+  if (err < 0) die(0, "failed to extract %s: %s", dst.c_str(), ErrorCodeString(err));
+  close(fd);
+}
+
+static void ListOne(const ZipEntry& entry, const std::string& name) {
+  tm t = entry.GetModificationTime();
+  char time[32];
+  snprintf(time, sizeof(time), "%04d-%02d-%02d %02d:%02d", t.tm_year + 1900, t.tm_mon + 1,
+           t.tm_mday, t.tm_hour, t.tm_min);
+  if (flag_v) {
+    printf("%8d  %s  %7d %3.0f%% %s %08x  %s\n", entry.uncompressed_length,
+           (entry.method == kCompressStored) ? "Stored" : "Defl:N", entry.compressed_length,
+           CompressionRatio(entry.uncompressed_length, entry.compressed_length), time, entry.crc32,
+           name.c_str());
+  } else {
+    printf("%9d  %s   %s\n", entry.uncompressed_length, time, name.c_str());
+  }
+}
+
+static void InfoOne(const ZipEntry& entry, const std::string& name) {
+  if (flag_1) {
+    // "android-ndk-r19b/sources/android/NOTICE"
+    printf("%s\n", name.c_str());
+    return;
+  }
+
+  int version = entry.version_made_by & 0xff;
+  int os = (entry.version_made_by >> 8) & 0xff;
+
+  // TODO: Support suid/sgid? Non-Unix/non-FAT host file system attributes?
+  const char* src_fs = "???";
+  char mode[] = "???       ";
+  if (os == 0) {
+    src_fs = "fat";
+    // https://docs.microsoft.com/en-us/windows/win32/fileio/file-attribute-constants
+    int attrs = entry.external_file_attributes & 0xff;
+    mode[0] = (attrs & 0x10) ? 'd' : '-';
+    mode[1] = 'r';
+    mode[2] = (attrs & 0x01) ? '-' : 'w';
+    // The man page also mentions ".btm", but that seems to be obsolete?
+    mode[3] = EndsWith(name, ".exe") || EndsWith(name, ".com") || EndsWith(name, ".bat") ||
+                      EndsWith(name, ".cmd")
+                  ? 'x'
+                  : '-';
+    mode[4] = (attrs & 0x20) ? 'a' : '-';
+    mode[5] = (attrs & 0x02) ? 'h' : '-';
+    mode[6] = (attrs & 0x04) ? 's' : '-';
+  } else if (os == 3) {
+    src_fs = "unx";
+    mode[0] = S_ISDIR(entry.unix_mode) ? 'd' : (S_ISREG(entry.unix_mode) ? '-' : '?');
+    mode[1] = entry.unix_mode & S_IRUSR ? 'r' : '-';
+    mode[2] = entry.unix_mode & S_IWUSR ? 'w' : '-';
+    mode[3] = entry.unix_mode & S_IXUSR ? 'x' : '-';
+    mode[4] = entry.unix_mode & S_IRGRP ? 'r' : '-';
+    mode[5] = entry.unix_mode & S_IWGRP ? 'w' : '-';
+    mode[6] = entry.unix_mode & S_IXGRP ? 'x' : '-';
+    mode[7] = entry.unix_mode & S_IROTH ? 'r' : '-';
+    mode[8] = entry.unix_mode & S_IWOTH ? 'w' : '-';
+    mode[9] = entry.unix_mode & S_IXOTH ? 'x' : '-';
+  }
+
+  char method[5] = "stor";
+  if (entry.method == kCompressDeflated) {
+    snprintf(method, sizeof(method), "def%c", "NXFS"[(entry.gpbf >> 1) & 0x3]);
+  }
+
+  // TODO: zipinfo (unlike unzip) sometimes uses time zone?
+  // TODO: this uses 4-digit years because we're not barbarians unless interoperability forces it.
+  tm t = entry.GetModificationTime();
+  char time[32];
+  snprintf(time, sizeof(time), "%04d-%02d-%02d %02d:%02d", t.tm_year + 1900, t.tm_mon + 1,
+           t.tm_mday, t.tm_hour, t.tm_min);
+
+  // "-rw-r--r--  3.0 unx      577 t- defX 19-Feb-12 16:09 android-ndk-r19b/sources/android/NOTICE"
+  printf("%s %2d.%d %s %8d %c%c %s %s %s\n", mode, version / 10, version % 10, src_fs,
+         entry.uncompressed_length, entry.is_text ? 't' : 'b',
+         entry.has_data_descriptor ? 'X' : 'x', method, time, name.c_str());
+}
+
+static void ProcessOne(ZipArchiveHandle zah, ZipEntry& entry, const std::string& name) {
+  if (role == kUnzip) {
+    if (flag_l || flag_v) {
+      // -l or -lv or -lq or -v.
+      ListOne(entry, name);
+    } else {
+      // Actually extract.
+      if (flag_p) {
+        ExtractToPipe(zah, entry, name);
+      } else {
+        ExtractOne(zah, entry, name);
+      }
+    }
+  } else {
+    // zipinfo or zipinfo -1.
+    InfoOne(entry, name);
+  }
+  total_uncompressed_length += entry.uncompressed_length;
+  total_compressed_length += entry.compressed_length;
+  ++file_count;
+}
+
+static void ProcessAll(ZipArchiveHandle zah) {
+  MaybeShowHeader(zah);
+
+  // libziparchive iteration order doesn't match the central directory.
+  // We could sort, but that would cost extra and wouldn't match either.
+  void* cookie;
+  int err = StartIteration(zah, &cookie);
+  if (err != 0) {
+    die(0, "couldn't iterate %s: %s", archive_name, ErrorCodeString(err));
+  }
+
+  ZipEntry entry;
+  std::string name;
+  while ((err = Next(cookie, &entry, &name)) >= 0) {
+    if (ShouldInclude(name)) ProcessOne(zah, entry, name);
+  }
+
+  if (err < -1) die(0, "failed iterating %s: %s", archive_name, ErrorCodeString(err));
+  EndIteration(cookie);
+
+  MaybeShowFooter();
+}
+
+static void ShowHelp(bool full) {
+  if (role == kUnzip) {
+    fprintf(full ? stdout : stderr, "usage: unzip [-d DIR] [-lnopqv] ZIP [FILE...] [-x FILE...]\n");
+    if (!full) exit(EXIT_FAILURE);
+
+    printf(
+        "\n"
+        "Extract FILEs from ZIP archive. Default is all files. Both the include and\n"
+        "exclude (-x) lists use shell glob patterns.\n"
+        "\n"
+        "-d DIR	Extract into DIR\n"
+        "-l	List contents (-lq excludes archive name, -lv is verbose)\n"
+        "-n	Never overwrite files (default: prompt)\n"
+        "-o	Always overwrite files\n"
+        "-p	Pipe to stdout\n"
+        "-q	Quiet\n"
+        "-v	List contents verbosely\n"
+        "-x FILE	Exclude files\n");
+  } else {
+    fprintf(full ? stdout : stderr, "usage: zipinfo [-1] ZIP [FILE...] [-x FILE...]\n");
+    if (!full) exit(EXIT_FAILURE);
+
+    printf(
+        "\n"
+        "Show information about FILEs from ZIP archive. Default is all files.\n"
+        "Both the include and exclude (-x) lists use shell glob patterns.\n"
+        "\n"
+        "-1	Show filenames only, one per line\n"
+        "-x FILE	Exclude files\n");
+  }
+  exit(EXIT_SUCCESS);
+}
+
+static void HandleCommonOption(int opt) {
+  switch (opt) {
+    case 'h':
+      ShowHelp(true);
+      break;
+    case 'x':
+      flag_x = true;
+      break;
+    case 1:
+      // -x swallows all following arguments, so we use '-' in the getopt
+      // string and collect files here.
+      if (!archive_name) {
+        archive_name = optarg;
+      } else if (flag_x) {
+        excludes.insert(optarg);
+      } else {
+        includes.insert(optarg);
+      }
+      break;
+    default:
+      ShowHelp(false);
+      break;
+  }
+}
+
+int main(int argc, char* argv[]) {
+  // Who am I, and what am I doing?
+  g_progname = basename(argv[0]);
+  if (!strcmp(g_progname, "ziptool") && argc > 1) return main(argc - 1, argv + 1);
+  if (!strcmp(g_progname, "unzip")) {
+    role = kUnzip;
+  } else if (!strcmp(g_progname, "zipinfo")) {
+    role = kZipinfo;
+  } else {
+    die(0, "run as ziptool with unzip or zipinfo as the first argument, or symlink");
+  }
+
+  static const struct option opts[] = {
+      {"help", no_argument, 0, 'h'},
+      {},
+  };
+
+  if (role == kUnzip) {
+    // `unzip -Z` is "zipinfo mode", so in that case just restart...
+    if (argc > 1 && !strcmp(argv[1], "-Z")) {
+      argv[1] = const_cast<char*>("zipinfo");
+      return main(argc - 1, argv + 1);
+    }
+
+    int opt;
+    while ((opt = getopt_long(argc, argv, "-d:hlnopqvx", opts, nullptr)) != -1) {
+      switch (opt) {
+        case 'd':
+          flag_d = optarg;
+          if (!EndsWith(flag_d, "/")) flag_d += '/';
+          break;
+        case 'l':
+          flag_l = true;
+          break;
+        case 'n':
+          overwrite_mode = kNever;
+          break;
+        case 'o':
+          overwrite_mode = kAlways;
+          break;
+        case 'p':
+          flag_p = flag_q = true;
+          break;
+        case 'q':
+          flag_q = true;
+          break;
+        case 'v':
+          flag_v = true;
+          break;
+        default:
+          HandleCommonOption(opt);
+          break;
+      }
+    }
+  } else {
+    int opt;
+    while ((opt = getopt_long(argc, argv, "-1hx", opts, nullptr)) != -1) {
+      switch (opt) {
+        case '1':
+          flag_1 = true;
+          break;
+        default:
+          HandleCommonOption(opt);
+          break;
+      }
+    }
+  }
+
+  if (!archive_name) die(0, "missing archive filename");
+
+  // We can't support "-" to unzip from stdin because libziparchive relies on mmap.
+  ZipArchiveHandle zah;
+  int32_t err;
+  if ((err = OpenArchive(archive_name, &zah)) != 0) {
+    die(0, "couldn't open %s: %s", archive_name, ErrorCodeString(err));
+  }
+
+  // Implement -d by changing into that directory.
+  // We'll create implicit directories based on paths in the zip file, and we'll create
+  // the -d directory itself, but we require that *parents* of the -d directory already exists.
+  // This is pretty arbitrary, but it's the behavior of the original unzip.
+  if (!flag_d.empty()) {
+    if (mkdir(flag_d.c_str(), 0777) == -1 && errno != EEXIST) {
+      die(errno, "couldn't created %s", flag_d.c_str());
+    }
+    if (chdir(flag_d.c_str()) == -1) {
+      die(errno, "couldn't chdir to %s", flag_d.c_str());
+    }
+  }
+
+  ProcessAll(zah);
+
+  CloseArchive(zah);
+  return 0;
+}
diff --git a/llkd/libllkd.cpp b/llkd/libllkd.cpp
index b26ad4d..1c3acb8 100644
--- a/llkd/libllkd.cpp
+++ b/llkd/libllkd.cpp
@@ -304,10 +304,13 @@
     bool cmdlineValid;             // cmdline has been cached
     bool updated;                  // cleared before monitoring pass.
     bool killed;                   // sent a kill to this thread, next panic...
+    bool frozen;                   // process is in frozen cgroup.
 
     void setComm(const char* _comm) { strncpy(comm + 1, _comm, sizeof(comm) - 2); }
 
-    proc(pid_t tid, pid_t pid, pid_t ppid, const char* _comm, int time, char state)
+    void setFrozen(bool _frozen) { frozen = _frozen; }
+
+    proc(pid_t tid, pid_t pid, pid_t ppid, const char* _comm, int time, char state, bool frozen)
         : tid(tid),
           schedUpdate(0),
           nrSwitches(0),
@@ -327,7 +330,8 @@
           exeMissingValid(false),
           cmdlineValid(false),
           updated(true),
-          killed(!llkTestWithKill) {
+          killed(!llkTestWithKill),
+          frozen(frozen) {
         memset(comm, '\0', sizeof(comm));
         setComm(_comm);
     }
@@ -373,6 +377,8 @@
         return uid;
     }
 
+    bool isFrozen() { return frozen; }
+
     void reset(void) {  // reset cache, if we detected pid rollover
         uid = -1;
         state = '?';
@@ -592,8 +598,9 @@
     tids.erase(tid);
 }
 
-proc* llkTidAlloc(pid_t tid, pid_t pid, pid_t ppid, const char* comm, int time, char state) {
-    auto it = tids.emplace(std::make_pair(tid, proc(tid, pid, ppid, comm, time, state)));
+proc* llkTidAlloc(pid_t tid, pid_t pid, pid_t ppid, const char* comm, int time, char state,
+                  bool frozen) {
+    auto it = tids.emplace(std::make_pair(tid, proc(tid, pid, ppid, comm, time, state, frozen)));
     return &it.first->second;
 }
 
@@ -1039,12 +1046,18 @@
                 continue;
             }
 
+            // Get the process cgroup
+            auto cgroup = ReadFile(piddir + "/cgroup");
+            auto frozen = cgroup.find(":freezer:/frozen") != std::string::npos;
+
             auto procp = llkTidLookup(tid);
             if (procp == nullptr) {
-                procp = llkTidAlloc(tid, pid, ppid, pdir, utime + stime, state);
+                procp = llkTidAlloc(tid, pid, ppid, pdir, utime + stime, state, frozen);
             } else {
                 // comm can change ...
                 procp->setComm(pdir);
+                // frozen can change, too...
+                procp->setFrozen(frozen);
                 procp->updated = true;
                 // pid/ppid/tid wrap?
                 if (((procp->update != prevUpdate) && (procp->update != llkUpdate)) ||
@@ -1084,6 +1097,9 @@
             if ((tid == myTid) || llkSkipPid(tid)) {
                 continue;
             }
+            if (procp->isFrozen()) {
+                break;
+            }
             if (llkSkipPpid(ppid)) {
                 break;
             }
@@ -1101,7 +1117,7 @@
 
             auto pprocp = llkTidLookup(ppid);
             if (pprocp == nullptr) {
-                pprocp = llkTidAlloc(ppid, ppid, 0, "", 0, '?');
+                pprocp = llkTidAlloc(ppid, ppid, 0, "", 0, '?', false);
             }
             if (pprocp) {
                 if (llkSkipPproc(pprocp, procp)) break;
diff --git a/llkd/llkd-debuggable.rc b/llkd/llkd-debuggable.rc
index 724cb5e..4b11b1c 100644
--- a/llkd/llkd-debuggable.rc
+++ b/llkd/llkd-debuggable.rc
@@ -13,7 +13,7 @@
     disabled
     user llkd
     group llkd readproc
-    capabilities KILL IPC_LOCK SYS_PTRACE DAC_OVERRIDE
+    capabilities KILL IPC_LOCK SYS_PTRACE DAC_OVERRIDE SYS_ADMIN
     file /dev/kmsg w
     file /proc/sysrq-trigger w
     writepid /dev/cpuset/system-background/tasks
diff --git a/llkd/tests/llkd_test.cpp b/llkd/tests/llkd_test.cpp
index 96079cc..475512c 100644
--- a/llkd/tests/llkd_test.cpp
+++ b/llkd/tests/llkd_test.cpp
@@ -89,7 +89,8 @@
         rest();
         std::string setprop("setprop ");
         // Manually check that SyS_openat is _added_ to the list when restarted
-        execute((setprop + LLK_CHECK_STACK_PROPERTY + " ,SyS_openat").c_str());
+        // 4.19+ kernels report __arm64_sys_openat b/147486902
+        execute((setprop + LLK_CHECK_STACK_PROPERTY + " ,SyS_openat,__arm64_sys_openat").c_str());
         rest();
         execute((setprop + LLK_ENABLE_WRITEABLE_PROPERTY + " false").c_str());
         rest();
diff --git a/lmkd/Android.bp b/lmkd/Android.bp
deleted file mode 100644
index e8e125b..0000000
--- a/lmkd/Android.bp
+++ /dev/null
@@ -1,60 +0,0 @@
-cc_defaults {
-    name: "stats_defaults",
-
-    product_variables: {
-        use_lmkd_stats_log: {
-            cflags: [
-                "-DLMKD_LOG_STATS"
-            ],
-        },
-    },
-}
-
-cc_binary {
-    name: "lmkd",
-
-    srcs: ["lmkd.c"],
-    shared_libs: [
-        "libcutils",
-        "liblog",
-        "libprocessgroup",
-        "libpsi",
-    ],
-    static_libs: [
-        "libstatslogc",
-        "libstatssocket",
-    ],
-    local_include_dirs: ["include"],
-    cflags: ["-Werror", "-DLMKD_TRACE_KILLS"],
-    init_rc: ["lmkd.rc"],
-    defaults: ["stats_defaults"],
-    logtags: ["event.logtags"],
-}
-
-cc_library_static {
-    name: "libstatslogc",
-    srcs: ["statslog.c"],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-    defaults: ["stats_defaults"],
-    shared_libs: [
-        "liblog",
-    ],
-    static_libs: ["libstatssocket",],
-}
-
-cc_library_static {
-    name: "liblmkd_utils",
-    srcs: ["liblmkd_utils.c"],
-    shared_libs: [
-        "libcutils",
-    ],
-    export_include_dirs: ["include"],
-    cppflags: [
-        "-g",
-        "-Wall",
-        "-Werror",
-    ]
-}
diff --git a/lmkd/OWNERS b/lmkd/OWNERS
deleted file mode 100644
index b15bb48..0000000
--- a/lmkd/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-surenb@google.com
diff --git a/lmkd/README.md b/lmkd/README.md
deleted file mode 100644
index 8a73692..0000000
--- a/lmkd/README.md
+++ /dev/null
@@ -1,90 +0,0 @@
-Android Low Memory Killer Daemon
-================================
-
-
-Introduction
-------------
-
-Android Low Memory Killer Daemon (lmkd) is a process monitoring memory
-state of a running Android system and reacting to high memory pressure
-by killing the least essential process(es) to keep system performing
-at acceptable levels.
-
-
-Background
-----------
-
-Historically on Android systems memory monitoring and killing of
-non-essential processes was handled by a kernel lowmemorykiller driver.
-Since Linux Kernel 4.12 the lowmemorykiller driver has been removed and
-instead userspace lmkd daemon performs these tasks.
-
-
-Android Properties
-------------------
-
-lmkd can be configured on a particular system using the following Android
-properties:
-
-  ro.config.low_ram:         choose between low-memory vs high-performance
-                             device. Default = false.
-
-  ro.lmk.use_minfree_levels: use free memory and file cache thresholds for
-                             making decisions when to kill. This mode works
-                             the same way kernel lowmemorykiller driver used
-                             to work. Default = false
-
-  ro.lmk.low:                min oom_adj score for processes eligible to be
-                             killed at low vmpressure level. Default = 1001
-                             (disabled)
-
-  ro.lmk.medium:             min oom_adj score for processes eligible to be
-                             killed at medium vmpressure level. Default = 800
-                             (non-essential processes)
-
-  ro.lmk.critical:           min oom_adj score for processes eligible to be
-                             killed at critical vmpressure level. Default = 0
-                             (all processes)
-
-  ro.lmk.critical_upgrade:   enables upgrade to critical level. Default = false
-
-  ro.lmk.upgrade_pressure:   max mem_pressure at which level will be upgraded
-                             because system is swapping too much. Default = 100
-                             (disabled)
-
-  ro.lmk.downgrade_pressure: min mem_pressure at which vmpressure event will
-                             be ignored because enough free memory is still
-                             available. Default = 100 (disabled)
-
-  ro.lmk.kill_heaviest_task: kill heaviest eligible task (best decision) vs.
-                             any eligible task (fast decision). Default = false
-
-  ro.lmk.kill_timeout_ms:    duration in ms after a kill when no additional
-                             kill will be done. Default = 0 (disabled)
-
-  ro.lmk.debug:              enable lmkd debug logs, Default = false
-
-  ro.lmk.swap_free_low_percentage: level of free swap as a percentage of the
-                             total swap space used as a threshold to consider
-                             the system as swap space starved. Default for
-                             low-RAM devices = 10, for high-end devices = 20
-
-  ro.lmk.thrashing_limit:    number of workingset refaults as a percentage of
-                             the file-backed pagecache size used as a threshold
-                             to consider system thrashing its pagecache.
-                             Default for low-RAM devices = 30, for high-end
-                             devices = 100
-
-  ro.lmk.thrashing_limit_decay: thrashing threshold decay expressed as a
-                             percentage of the original threshold used to lower
-                             the threshold when system does not recover even
-                             after a kill. Default for low-RAM devices = 50,
-                             for high-end devices = 10
-
-  ro.lmk.psi_partial_stall_ms: partial PSI stall threshold in milliseconds for
-                             triggering low memory notification. Default for
-                             low-RAM devices = 200, for high-end devices = 70
-
-  ro.lmk.psi_complete_stall_ms: complete PSI stall threshold in milliseconds for
-                             triggering critical memory notification. Default =
-                             700
diff --git a/lmkd/event.logtags b/lmkd/event.logtags
deleted file mode 100644
index 452f411..0000000
--- a/lmkd/event.logtags
+++ /dev/null
@@ -1,38 +0,0 @@
-# The entries in this file map a sparse set of log tag numbers to tag names.
-# This is installed on the device, in /system/etc, and parsed by logcat.
-#
-# Tag numbers are decimal integers, from 0 to 2^31.  (Let's leave the
-# negative values alone for now.)
-#
-# Tag names are one or more ASCII letters and numbers or underscores, i.e.
-# "[A-Z][a-z][0-9]_".  Do not include spaces or punctuation (the former
-# impacts log readability, the latter makes regex searches more annoying).
-#
-# Tag numbers and names are separated by whitespace.  Blank lines and lines
-# starting with '#' are ignored.
-#
-# Optionally, after the tag names can be put a description for the value(s)
-# of the tag. Description are in the format
-#    (<name>|data type[|data unit])
-# Multiple values are separated by commas.
-#
-# The data type is a number from the following values:
-# 1: int32_t
-# 2: int64_t
-# 3: string
-# 4: list
-#
-# The data unit is a number taken from the following list:
-# 1: Number of objects
-# 2: Number of bytes
-# 3: Number of milliseconds
-# 4: Number of allocations
-# 5: Id
-# 6: Percent
-# s: Number of seconds (monotonic time)
-# Default value for data of type int/long is 2 (bytes).
-#
-# TODO: generate ".java" and ".h" files with integer constants from this file.
-
-# for killinfo logs
-10195355 killinfo (Pid|1|5),(Uid|1|5),(OomAdj|1),(MinOomAdj|1),(TaskSize|1),(enum kill_reasons|1|5),(MemFree|1),(Cached|1),(SwapCached|1),(Buffers|1),(Shmem|1),(Unevictable|1),(SwapTotal|1),(SwapFree|1),(ActiveAnon|1),(InactiveAnon|1),(ActiveFile|1),(InactiveFile|1),(SReclaimable|1),(SUnreclaim|1),(KernelStack|1),(PageTables|1),(IonHeap|1),(IonHeapPool|1),(CmaFree|1)
diff --git a/lmkd/include/liblmkd_utils.h b/lmkd/include/liblmkd_utils.h
deleted file mode 100644
index 72e3f4a..0000000
--- a/lmkd/include/liblmkd_utils.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _LIBLMKD_UTILS_H_
-#define _LIBLMKD_UTILS_H_
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-#include <lmkd.h>
-
-__BEGIN_DECLS
-
-/*
- * Connects to lmkd process and returns socket handle.
- * On success returns socket handle.
- * On error, -1 is returned, and errno is set appropriately.
- */
-int lmkd_connect();
-
-/*
- * Registers a process with lmkd and sets its oomadj score.
- * On success returns 0.
- * On error, -1 is returned.
- * In the case of error errno is set appropriately.
- */
-int lmkd_register_proc(int sock, struct lmk_procprio *params);
-
-/*
- * Creates memcg directory for given process.
- * On success returns 0.
- * -1 is returned if path creation failed.
- * -2 is returned if tasks file open operation failed.
- * -3 is returned if tasks file write operation failed.
- * In the case of error errno is set appropriately.
- */
-int create_memcg(uid_t uid, pid_t pid);
-
-__END_DECLS
-
-#endif /* _LIBLMKD_UTILS_H_ */
diff --git a/lmkd/include/lmkd.h b/lmkd/include/lmkd.h
deleted file mode 100644
index 59377dd..0000000
--- a/lmkd/include/lmkd.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _LMKD_H_
-#define _LMKD_H_
-
-#include <arpa/inet.h>
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-__BEGIN_DECLS
-
-/*
- * Supported LMKD commands
- */
-enum lmk_cmd {
-    LMK_TARGET = 0,  /* Associate minfree with oom_adj_score */
-    LMK_PROCPRIO,    /* Register a process and set its oom_adj_score */
-    LMK_PROCREMOVE,  /* Unregister a process */
-    LMK_PROCPURGE,   /* Purge all registered processes */
-    LMK_GETKILLCNT,  /* Get number of kills */
-};
-
-/*
- * Max number of targets in LMK_TARGET command.
- */
-#define MAX_TARGETS 6
-
-/*
- * Max packet length in bytes.
- * Longest packet is LMK_TARGET followed by MAX_TARGETS
- * of minfree and oom_adj_score values
- */
-#define CTRL_PACKET_MAX_SIZE (sizeof(int) * (MAX_TARGETS * 2 + 1))
-
-/* LMKD packet - first int is lmk_cmd followed by payload */
-typedef int LMKD_CTRL_PACKET[CTRL_PACKET_MAX_SIZE / sizeof(int)];
-
-/* Get LMKD packet command */
-static inline enum lmk_cmd lmkd_pack_get_cmd(LMKD_CTRL_PACKET pack) {
-    return (enum lmk_cmd)ntohl(pack[0]);
-}
-
-/* LMK_TARGET packet payload */
-struct lmk_target {
-    int minfree;
-    int oom_adj_score;
-};
-
-/*
- * For LMK_TARGET packet get target_idx-th payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_target(LMKD_CTRL_PACKET packet, int target_idx,
-                                        struct lmk_target* target) {
-    target->minfree = ntohl(packet[target_idx * 2 + 1]);
-    target->oom_adj_score = ntohl(packet[target_idx * 2 + 2]);
-}
-
-/*
- * Prepare LMK_TARGET packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_target(LMKD_CTRL_PACKET packet, struct lmk_target* targets,
-                                          size_t target_cnt) {
-    int idx = 0;
-    packet[idx++] = htonl(LMK_TARGET);
-    while (target_cnt) {
-        packet[idx++] = htonl(targets->minfree);
-        packet[idx++] = htonl(targets->oom_adj_score);
-        targets++;
-        target_cnt--;
-    }
-    return idx * sizeof(int);
-}
-
-/* LMK_PROCPRIO packet payload */
-struct lmk_procprio {
-    pid_t pid;
-    uid_t uid;
-    int oomadj;
-};
-
-/*
- * For LMK_PROCPRIO packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_procprio(LMKD_CTRL_PACKET packet, struct lmk_procprio* params) {
-    params->pid = (pid_t)ntohl(packet[1]);
-    params->uid = (uid_t)ntohl(packet[2]);
-    params->oomadj = ntohl(packet[3]);
-}
-
-/*
- * Prepare LMK_PROCPRIO packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procprio(LMKD_CTRL_PACKET packet, struct lmk_procprio* params) {
-    packet[0] = htonl(LMK_PROCPRIO);
-    packet[1] = htonl(params->pid);
-    packet[2] = htonl(params->uid);
-    packet[3] = htonl(params->oomadj);
-    return 4 * sizeof(int);
-}
-
-/* LMK_PROCREMOVE packet payload */
-struct lmk_procremove {
-    pid_t pid;
-};
-
-/*
- * For LMK_PROCREMOVE packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_procremove(LMKD_CTRL_PACKET packet,
-                                            struct lmk_procremove* params) {
-    params->pid = (pid_t)ntohl(packet[1]);
-}
-
-/*
- * Prepare LMK_PROCREMOVE packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procremove(LMKD_CTRL_PACKET packet,
-                                              struct lmk_procprio* params) {
-    packet[0] = htonl(LMK_PROCREMOVE);
-    packet[1] = htonl(params->pid);
-    return 2 * sizeof(int);
-}
-
-/*
- * Prepare LMK_PROCPURGE packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_procpurge(LMKD_CTRL_PACKET packet) {
-    packet[0] = htonl(LMK_PROCPURGE);
-    return sizeof(int);
-}
-
-/* LMK_GETKILLCNT packet payload */
-struct lmk_getkillcnt {
-    int min_oomadj;
-    int max_oomadj;
-};
-
-/*
- * For LMK_GETKILLCNT packet get its payload.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline void lmkd_pack_get_getkillcnt(LMKD_CTRL_PACKET packet,
-                                            struct lmk_getkillcnt* params) {
-    params->min_oomadj = ntohl(packet[1]);
-    params->max_oomadj = ntohl(packet[2]);
-}
-
-/*
- * Prepare LMK_GETKILLCNT packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_getkillcnt(LMKD_CTRL_PACKET packet,
-                                              struct lmk_getkillcnt* params) {
-    packet[0] = htonl(LMK_GETKILLCNT);
-    packet[1] = htonl(params->min_oomadj);
-    packet[2] = htonl(params->max_oomadj);
-    return 3 * sizeof(int);
-}
-
-/*
- * Prepare LMK_GETKILLCNT reply packet and return packet size in bytes.
- * Warning: no checks performed, caller should ensure valid parameters.
- */
-static inline size_t lmkd_pack_set_getkillcnt_repl(LMKD_CTRL_PACKET packet, int kill_cnt) {
-    packet[0] = htonl(LMK_GETKILLCNT);
-    packet[1] = htonl(kill_cnt);
-    return 2 * sizeof(int);
-}
-
-__END_DECLS
-
-#endif /* _LMKD_H_ */
diff --git a/lmkd/liblmkd_utils.c b/lmkd/liblmkd_utils.c
deleted file mode 100644
index fa3b7a9..0000000
--- a/lmkd/liblmkd_utils.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/cdefs.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include <liblmkd_utils.h>
-#include <cutils/sockets.h>
-
-int lmkd_connect() {
-    return socket_local_client("lmkd",
-                               ANDROID_SOCKET_NAMESPACE_RESERVED,
-                               SOCK_SEQPACKET);
-}
-
-int lmkd_register_proc(int sock, struct lmk_procprio *params) {
-    LMKD_CTRL_PACKET packet;
-    size_t size;
-    int ret;
-
-    size = lmkd_pack_set_procprio(packet, params);
-    ret = TEMP_FAILURE_RETRY(write(sock, packet, size));
-
-    return (ret < 0) ? -1 : 0;
-}
-
-int create_memcg(uid_t uid, pid_t pid) {
-    char buf[256];
-    int tasks_file;
-    int written;
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u", uid);
-    if (mkdir(buf, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) < 0 &&
-        errno != EEXIST) {
-        return -1;
-    }
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u/pid_%u", uid, pid);
-    if (mkdir(buf, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) < 0 &&
-        errno != EEXIST) {
-        return -1;
-    }
-
-    snprintf(buf, sizeof(buf), "/dev/memcg/apps/uid_%u/pid_%u/tasks", uid, pid);
-    tasks_file = open(buf, O_WRONLY);
-    if (tasks_file < 0) {
-        return -2;
-    }
-    written = snprintf(buf, sizeof(buf), "%u", pid);
-    if (__predict_false(written >= (int)sizeof(buf))) {
-        written = sizeof(buf) - 1;
-    }
-    written = TEMP_FAILURE_RETRY(write(tasks_file, buf, written));
-    close(tasks_file);
-
-    return (written < 0) ? -3 : 0;
-}
-
diff --git a/lmkd/libpsi/Android.bp b/lmkd/libpsi/Android.bp
deleted file mode 100644
index 8a97094..0000000
--- a/lmkd/libpsi/Android.bp
+++ /dev/null
@@ -1,22 +0,0 @@
-cc_library_headers {
-    name: "libpsi_headers",
-    export_include_dirs: ["include"],
-}
-
-cc_library {
-    name: "libpsi",
-    srcs: ["psi.c"],
-    shared_libs: [
-        "liblog"
-    ],
-    header_libs: [
-        "libpsi_headers",
-    ],
-    export_header_lib_headers: [
-        "libpsi_headers",
-    ],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
diff --git a/lmkd/libpsi/OWNERS b/lmkd/libpsi/OWNERS
deleted file mode 100644
index b15bb48..0000000
--- a/lmkd/libpsi/OWNERS
+++ /dev/null
@@ -1 +0,0 @@
-surenb@google.com
diff --git a/lmkd/libpsi/include/psi/psi.h b/lmkd/libpsi/include/psi/psi.h
deleted file mode 100644
index cd49e8b..0000000
--- a/lmkd/libpsi/include/psi/psi.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef __ANDROID_PSI_H__
-#define __ANDROID_PSI_H__
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-
-__BEGIN_DECLS
-
-enum psi_stall_type {
-    PSI_SOME,
-    PSI_FULL,
-    PSI_TYPE_COUNT
-};
-
-/*
- * Initializes psi monitor.
- * stall_type, threshold_us and window_us are monitor parameters
- * When successful, the function returns file descriptor that can
- * be used with poll/epoll syscalls to wait for EPOLLPRI events.
- * When unsuccessful, the function returns -1 and errno is set
- * appropriately.
- */
-int init_psi_monitor(enum psi_stall_type stall_type,
-        int threshold_us, int window_us);
-
-/*
- * Registers psi monitor file descriptor fd on the epoll instance
- * referred to by the file descriptor epollfd.
- * data parameter will be associated with event's epoll_data.ptr
- * member.
- */
-int register_psi_monitor(int epollfd, int fd, void* data);
-
-/*
- * Unregisters psi monitor file descriptor fd from the epoll instance
- * referred to by the file descriptor epollfd.
- */
-int unregister_psi_monitor(int epollfd, int fd);
-
-/*
- * Destroys psi monitor.
- * fd is the file descriptor returned by psi monitor initialization
- * routine.
- * Note that if user process exits without calling this routine
- * kernel will destroy the monitor as its lifetime is linked to
- * the file descriptor.
- */
-void destroy_psi_monitor(int fd);
-
-__END_DECLS
-
-#endif  // __ANDROID_PSI_H__
diff --git a/lmkd/libpsi/psi.c b/lmkd/libpsi/psi.c
deleted file mode 100644
index f4d5d18..0000000
--- a/lmkd/libpsi/psi.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "libpsi"
-
-#include <errno.h>
-#include <string.h>
-#include <sys/epoll.h>
-
-#include <log/log.h>
-#include "psi/psi.h"
-
-#define PSI_MON_FILE_MEMORY "/proc/pressure/memory"
-
-static const char* stall_type_name[] = {
-        "some",
-        "full",
-};
-
-int init_psi_monitor(enum psi_stall_type stall_type,
-             int threshold_us, int window_us) {
-    int fd;
-    int res;
-    char buf[256];
-
-    fd = TEMP_FAILURE_RETRY(open(PSI_MON_FILE_MEMORY, O_WRONLY | O_CLOEXEC));
-    if (fd < 0) {
-        ALOGE("No kernel psi monitor support (errno=%d)", errno);
-        return -1;
-    }
-
-    switch (stall_type) {
-    case (PSI_SOME):
-    case (PSI_FULL):
-        res = snprintf(buf, sizeof(buf), "%s %d %d",
-            stall_type_name[stall_type], threshold_us, window_us);
-        break;
-    default:
-        ALOGE("Invalid psi stall type: %d", stall_type);
-        errno = EINVAL;
-        goto err;
-    }
-
-    if (res >= (ssize_t)sizeof(buf)) {
-        ALOGE("%s line overflow for psi stall type '%s'",
-            PSI_MON_FILE_MEMORY, stall_type_name[stall_type]);
-        errno = EINVAL;
-        goto err;
-    }
-
-    res = TEMP_FAILURE_RETRY(write(fd, buf, strlen(buf) + 1));
-    if (res < 0) {
-        ALOGE("%s write failed for psi stall type '%s'; errno=%d",
-            PSI_MON_FILE_MEMORY, stall_type_name[stall_type], errno);
-        goto err;
-    }
-
-    return fd;
-
-err:
-    close(fd);
-    return -1;
-}
-
-int register_psi_monitor(int epollfd, int fd, void* data) {
-    int res;
-    struct epoll_event epev;
-
-    epev.events = EPOLLPRI;
-    epev.data.ptr = data;
-    res = epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &epev);
-    if (res < 0) {
-        ALOGE("epoll_ctl for psi monitor failed; errno=%d", errno);
-    }
-    return res;
-}
-
-int unregister_psi_monitor(int epollfd, int fd) {
-    return epoll_ctl(epollfd, EPOLL_CTL_DEL, fd, NULL);
-}
-
-void destroy_psi_monitor(int fd) {
-    if (fd >= 0) {
-        close(fd);
-    }
-}
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
deleted file mode 100644
index 9de7ff7..0000000
--- a/lmkd/lmkd.c
+++ /dev/null
@@ -1,2936 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "lowmemorykiller"
-
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <pwd.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/cdefs.h>
-#include <sys/epoll.h>
-#include <sys/eventfd.h>
-#include <sys/mman.h>
-#include <sys/resource.h>
-#include <sys/socket.h>
-#include <sys/syscall.h>
-#include <sys/sysinfo.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-#include <cutils/properties.h>
-#include <cutils/sched_policy.h>
-#include <cutils/sockets.h>
-#include <lmkd.h>
-#include <log/log.h>
-#include <log/log_event_list.h>
-#include <log/log_time.h>
-#include <psi/psi.h>
-#include <system/thread_defs.h>
-
-#include "statslog.h"
-
-/*
- * Define LMKD_TRACE_KILLS to record lmkd kills in kernel traces
- * to profile and correlate with OOM kills
- */
-#ifdef LMKD_TRACE_KILLS
-
-#define ATRACE_TAG ATRACE_TAG_ALWAYS
-#include <cutils/trace.h>
-
-#define TRACE_KILL_START(pid) ATRACE_INT(__FUNCTION__, pid);
-#define TRACE_KILL_END()      ATRACE_INT(__FUNCTION__, 0);
-
-#else /* LMKD_TRACE_KILLS */
-
-#define TRACE_KILL_START(pid) ((void)(pid))
-#define TRACE_KILL_END() ((void)0)
-
-#endif /* LMKD_TRACE_KILLS */
-
-#ifndef __unused
-#define __unused __attribute__((__unused__))
-#endif
-
-#define MEMCG_SYSFS_PATH "/dev/memcg/"
-#define MEMCG_MEMORY_USAGE "/dev/memcg/memory.usage_in_bytes"
-#define MEMCG_MEMORYSW_USAGE "/dev/memcg/memory.memsw.usage_in_bytes"
-#define ZONEINFO_PATH "/proc/zoneinfo"
-#define MEMINFO_PATH "/proc/meminfo"
-#define VMSTAT_PATH "/proc/vmstat"
-#define PROC_STATUS_TGID_FIELD "Tgid:"
-#define LINE_MAX 128
-
-#define PERCEPTIBLE_APP_ADJ 200
-
-/* Android Logger event logtags (see event.logtags) */
-#define KILLINFO_LOG_TAG 10195355
-
-/* gid containing AID_SYSTEM required */
-#define INKERNEL_MINFREE_PATH "/sys/module/lowmemorykiller/parameters/minfree"
-#define INKERNEL_ADJ_PATH "/sys/module/lowmemorykiller/parameters/adj"
-
-#define ARRAY_SIZE(x)   (sizeof(x) / sizeof(*(x)))
-#define EIGHT_MEGA (1 << 23)
-
-#define TARGET_UPDATE_MIN_INTERVAL_MS 1000
-
-#define NS_PER_MS (NS_PER_SEC / MS_PER_SEC)
-#define US_PER_MS (US_PER_SEC / MS_PER_SEC)
-
-/* Defined as ProcessList.SYSTEM_ADJ in ProcessList.java */
-#define SYSTEM_ADJ (-900)
-
-#define STRINGIFY(x) STRINGIFY_INTERNAL(x)
-#define STRINGIFY_INTERNAL(x) #x
-
-/*
- * PSI monitor tracking window size.
- * PSI monitor generates events at most once per window,
- * therefore we poll memory state for the duration of
- * PSI_WINDOW_SIZE_MS after the event happens.
- */
-#define PSI_WINDOW_SIZE_MS 1000
-/* Polling period after PSI signal when pressure is high */
-#define PSI_POLL_PERIOD_SHORT_MS 10
-/* Polling period after PSI signal when pressure is low */
-#define PSI_POLL_PERIOD_LONG_MS 100
-
-#define min(a, b) (((a) < (b)) ? (a) : (b))
-#define max(a, b) (((a) > (b)) ? (a) : (b))
-
-#define FAIL_REPORT_RLIMIT_MS 1000
-
-/*
- * System property defaults
- */
-/* ro.lmk.swap_free_low_percentage property defaults */
-#define DEF_LOW_SWAP_LOWRAM 10
-#define DEF_LOW_SWAP 20
-/* ro.lmk.thrashing_limit property defaults */
-#define DEF_THRASHING_LOWRAM 30
-#define DEF_THRASHING 100
-/* ro.lmk.thrashing_limit_decay property defaults */
-#define DEF_THRASHING_DECAY_LOWRAM 50
-#define DEF_THRASHING_DECAY 10
-/* ro.lmk.psi_partial_stall_ms property defaults */
-#define DEF_PARTIAL_STALL_LOWRAM 200
-#define DEF_PARTIAL_STALL 70
-/* ro.lmk.psi_complete_stall_ms property defaults */
-#define DEF_COMPLETE_STALL 700
-
-static inline int sys_pidfd_open(pid_t pid, unsigned int flags) {
-    return syscall(__NR_pidfd_open, pid, flags);
-}
-
-static inline int sys_pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
-                                        unsigned int flags) {
-    return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags);
-}
-
-/* default to old in-kernel interface if no memory pressure events */
-static bool use_inkernel_interface = true;
-static bool has_inkernel_module;
-
-/* memory pressure levels */
-enum vmpressure_level {
-    VMPRESS_LEVEL_LOW = 0,
-    VMPRESS_LEVEL_MEDIUM,
-    VMPRESS_LEVEL_CRITICAL,
-    VMPRESS_LEVEL_COUNT
-};
-
-static const char *level_name[] = {
-    "low",
-    "medium",
-    "critical"
-};
-
-struct {
-    int64_t min_nr_free_pages; /* recorded but not used yet */
-    int64_t max_nr_free_pages;
-} low_pressure_mem = { -1, -1 };
-
-struct psi_threshold {
-    enum psi_stall_type stall_type;
-    int threshold_ms;
-};
-
-static int level_oomadj[VMPRESS_LEVEL_COUNT];
-static int mpevfd[VMPRESS_LEVEL_COUNT] = { -1, -1, -1 };
-static bool pidfd_supported;
-static int last_kill_pid_or_fd = -1;
-static struct timespec last_kill_tm;
-
-/* lmkd configurable parameters */
-static bool debug_process_killing;
-static bool enable_pressure_upgrade;
-static int64_t upgrade_pressure;
-static int64_t downgrade_pressure;
-static bool low_ram_device;
-static bool kill_heaviest_task;
-static unsigned long kill_timeout_ms;
-static bool use_minfree_levels;
-static bool per_app_memcg;
-static int swap_free_low_percentage;
-static int psi_partial_stall_ms;
-static int psi_complete_stall_ms;
-static int thrashing_limit_pct;
-static int thrashing_limit_decay_pct;
-static bool use_psi_monitors = false;
-static struct kernel_poll_info kpoll_info;
-static struct psi_threshold psi_thresholds[VMPRESS_LEVEL_COUNT] = {
-    { PSI_SOME, 70 },    /* 70ms out of 1sec for partial stall */
-    { PSI_SOME, 100 },   /* 100ms out of 1sec for partial stall */
-    { PSI_FULL, 70 },    /* 70ms out of 1sec for complete stall */
-};
-
-static android_log_context ctx;
-
-enum polling_update {
-    POLLING_DO_NOT_CHANGE,
-    POLLING_START,
-    POLLING_STOP,
-    POLLING_PAUSE,
-    POLLING_RESUME,
-};
-
-/*
- * Data used for periodic polling for the memory state of the device.
- * Note that when system is not polling poll_handler is set to NULL,
- * when polling starts poll_handler gets set and is reset back to
- * NULL when polling stops.
- */
-struct polling_params {
-    struct event_handler_info* poll_handler;
-    struct event_handler_info* paused_handler;
-    struct timespec poll_start_tm;
-    struct timespec last_poll_tm;
-    int polling_interval_ms;
-    enum polling_update update;
-};
-
-/* data required to handle events */
-struct event_handler_info {
-    int data;
-    void (*handler)(int data, uint32_t events, struct polling_params *poll_params);
-};
-
-/* data required to handle socket events */
-struct sock_event_handler_info {
-    int sock;
-    struct event_handler_info handler_info;
-};
-
-/* max supported number of data connections */
-#define MAX_DATA_CONN 2
-
-/* socket event handler data */
-static struct sock_event_handler_info ctrl_sock;
-static struct sock_event_handler_info data_sock[MAX_DATA_CONN];
-
-/* vmpressure event handler data */
-static struct event_handler_info vmpressure_hinfo[VMPRESS_LEVEL_COUNT];
-
-/*
- * 1 ctrl listen socket, 2 ctrl data socket, 3 memory pressure levels,
- * 1 lmk events + 1 fd to wait for process death
- */
-#define MAX_EPOLL_EVENTS (1 + MAX_DATA_CONN + VMPRESS_LEVEL_COUNT + 1 + 1)
-static int epollfd;
-static int maxevents;
-
-/* OOM score values used by both kernel and framework */
-#define OOM_SCORE_ADJ_MIN       (-1000)
-#define OOM_SCORE_ADJ_MAX       1000
-
-static int lowmem_adj[MAX_TARGETS];
-static int lowmem_minfree[MAX_TARGETS];
-static int lowmem_targets_size;
-
-/* Fields to parse in /proc/zoneinfo */
-/* zoneinfo per-zone fields */
-enum zoneinfo_zone_field {
-    ZI_ZONE_NR_FREE_PAGES = 0,
-    ZI_ZONE_MIN,
-    ZI_ZONE_LOW,
-    ZI_ZONE_HIGH,
-    ZI_ZONE_PRESENT,
-    ZI_ZONE_NR_FREE_CMA,
-    ZI_ZONE_FIELD_COUNT
-};
-
-static const char* const zoneinfo_zone_field_names[ZI_ZONE_FIELD_COUNT] = {
-    "nr_free_pages",
-    "min",
-    "low",
-    "high",
-    "present",
-    "nr_free_cma",
-};
-
-/* zoneinfo per-zone special fields */
-enum zoneinfo_zone_spec_field {
-    ZI_ZONE_SPEC_PROTECTION = 0,
-    ZI_ZONE_SPEC_PAGESETS,
-    ZI_ZONE_SPEC_FIELD_COUNT,
-};
-
-static const char* const zoneinfo_zone_spec_field_names[ZI_ZONE_SPEC_FIELD_COUNT] = {
-    "protection:",
-    "pagesets",
-};
-
-/* see __MAX_NR_ZONES definition in kernel mmzone.h */
-#define MAX_NR_ZONES 6
-
-union zoneinfo_zone_fields {
-    struct {
-        int64_t nr_free_pages;
-        int64_t min;
-        int64_t low;
-        int64_t high;
-        int64_t present;
-        int64_t nr_free_cma;
-    } field;
-    int64_t arr[ZI_ZONE_FIELD_COUNT];
-};
-
-struct zoneinfo_zone {
-    union zoneinfo_zone_fields fields;
-    int64_t protection[MAX_NR_ZONES];
-    int64_t max_protection;
-};
-
-/* zoneinfo per-node fields */
-enum zoneinfo_node_field {
-    ZI_NODE_NR_INACTIVE_FILE = 0,
-    ZI_NODE_NR_ACTIVE_FILE,
-    ZI_NODE_WORKINGSET_REFAULT,
-    ZI_NODE_FIELD_COUNT
-};
-
-static const char* const zoneinfo_node_field_names[ZI_NODE_FIELD_COUNT] = {
-    "nr_inactive_file",
-    "nr_active_file",
-    "workingset_refault",
-};
-
-union zoneinfo_node_fields {
-    struct {
-        int64_t nr_inactive_file;
-        int64_t nr_active_file;
-        int64_t workingset_refault;
-    } field;
-    int64_t arr[ZI_NODE_FIELD_COUNT];
-};
-
-struct zoneinfo_node {
-    int id;
-    int zone_count;
-    struct zoneinfo_zone zones[MAX_NR_ZONES];
-    union zoneinfo_node_fields fields;
-};
-
-/* for now two memory nodes is more than enough */
-#define MAX_NR_NODES 2
-
-struct zoneinfo {
-    int node_count;
-    struct zoneinfo_node nodes[MAX_NR_NODES];
-    int64_t totalreserve_pages;
-    int64_t total_inactive_file;
-    int64_t total_active_file;
-    int64_t total_workingset_refault;
-};
-
-/* Fields to parse in /proc/meminfo */
-enum meminfo_field {
-    MI_NR_FREE_PAGES = 0,
-    MI_CACHED,
-    MI_SWAP_CACHED,
-    MI_BUFFERS,
-    MI_SHMEM,
-    MI_UNEVICTABLE,
-    MI_TOTAL_SWAP,
-    MI_FREE_SWAP,
-    MI_ACTIVE_ANON,
-    MI_INACTIVE_ANON,
-    MI_ACTIVE_FILE,
-    MI_INACTIVE_FILE,
-    MI_SRECLAIMABLE,
-    MI_SUNRECLAIM,
-    MI_KERNEL_STACK,
-    MI_PAGE_TABLES,
-    MI_ION_HELP,
-    MI_ION_HELP_POOL,
-    MI_CMA_FREE,
-    MI_FIELD_COUNT
-};
-
-static const char* const meminfo_field_names[MI_FIELD_COUNT] = {
-    "MemFree:",
-    "Cached:",
-    "SwapCached:",
-    "Buffers:",
-    "Shmem:",
-    "Unevictable:",
-    "SwapTotal:",
-    "SwapFree:",
-    "Active(anon):",
-    "Inactive(anon):",
-    "Active(file):",
-    "Inactive(file):",
-    "SReclaimable:",
-    "SUnreclaim:",
-    "KernelStack:",
-    "PageTables:",
-    "ION_heap:",
-    "ION_heap_pool:",
-    "CmaFree:",
-};
-
-union meminfo {
-    struct {
-        int64_t nr_free_pages;
-        int64_t cached;
-        int64_t swap_cached;
-        int64_t buffers;
-        int64_t shmem;
-        int64_t unevictable;
-        int64_t total_swap;
-        int64_t free_swap;
-        int64_t active_anon;
-        int64_t inactive_anon;
-        int64_t active_file;
-        int64_t inactive_file;
-        int64_t sreclaimable;
-        int64_t sunreclaimable;
-        int64_t kernel_stack;
-        int64_t page_tables;
-        int64_t ion_heap;
-        int64_t ion_heap_pool;
-        int64_t cma_free;
-        /* fields below are calculated rather than read from the file */
-        int64_t nr_file_pages;
-    } field;
-    int64_t arr[MI_FIELD_COUNT];
-};
-
-/* Fields to parse in /proc/vmstat */
-enum vmstat_field {
-    VS_FREE_PAGES,
-    VS_INACTIVE_FILE,
-    VS_ACTIVE_FILE,
-    VS_WORKINGSET_REFAULT,
-    VS_PGSCAN_KSWAPD,
-    VS_PGSCAN_DIRECT,
-    VS_PGSCAN_DIRECT_THROTTLE,
-    VS_FIELD_COUNT
-};
-
-static const char* const vmstat_field_names[MI_FIELD_COUNT] = {
-    "nr_free_pages",
-    "nr_inactive_file",
-    "nr_active_file",
-    "workingset_refault",
-    "pgscan_kswapd",
-    "pgscan_direct",
-    "pgscan_direct_throttle",
-};
-
-union vmstat {
-    struct {
-        int64_t nr_free_pages;
-        int64_t nr_inactive_file;
-        int64_t nr_active_file;
-        int64_t workingset_refault;
-        int64_t pgscan_kswapd;
-        int64_t pgscan_direct;
-        int64_t pgscan_direct_throttle;
-    } field;
-    int64_t arr[VS_FIELD_COUNT];
-};
-
-enum field_match_result {
-    NO_MATCH,
-    PARSE_FAIL,
-    PARSE_SUCCESS
-};
-
-struct adjslot_list {
-    struct adjslot_list *next;
-    struct adjslot_list *prev;
-};
-
-struct proc {
-    struct adjslot_list asl;
-    int pid;
-    int pidfd;
-    uid_t uid;
-    int oomadj;
-    struct proc *pidhash_next;
-};
-
-struct reread_data {
-    const char* const filename;
-    int fd;
-};
-
-#define PIDHASH_SZ 1024
-static struct proc *pidhash[PIDHASH_SZ];
-#define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
-
-#define ADJTOSLOT(adj) ((adj) + -OOM_SCORE_ADJ_MIN)
-#define ADJTOSLOT_COUNT (ADJTOSLOT(OOM_SCORE_ADJ_MAX) + 1)
-static struct adjslot_list procadjslot_list[ADJTOSLOT_COUNT];
-
-#define MAX_DISTINCT_OOM_ADJ 32
-#define KILLCNT_INVALID_IDX 0xFF
-/*
- * Because killcnt array is sparse a two-level indirection is used
- * to keep the size small. killcnt_idx stores index of the element in
- * killcnt array. Index KILLCNT_INVALID_IDX indicates an unused slot.
- */
-static uint8_t killcnt_idx[ADJTOSLOT_COUNT];
-static uint16_t killcnt[MAX_DISTINCT_OOM_ADJ];
-static int killcnt_free_idx = 0;
-static uint32_t killcnt_total = 0;
-
-/* PAGE_SIZE / 1024 */
-static long page_k;
-
-static int clamp(int low, int high, int value) {
-    return max(min(value, high), low);
-}
-
-static bool parse_int64(const char* str, int64_t* ret) {
-    char* endptr;
-    long long val = strtoll(str, &endptr, 10);
-    if (str == endptr || val > INT64_MAX) {
-        return false;
-    }
-    *ret = (int64_t)val;
-    return true;
-}
-
-static int find_field(const char* name, const char* const field_names[], int field_count) {
-    for (int i = 0; i < field_count; i++) {
-        if (!strcmp(name, field_names[i])) {
-            return i;
-        }
-    }
-    return -1;
-}
-
-static enum field_match_result match_field(const char* cp, const char* ap,
-                                   const char* const field_names[],
-                                   int field_count, int64_t* field,
-                                   int *field_idx) {
-    int i = find_field(cp, field_names, field_count);
-    if (i < 0) {
-        return NO_MATCH;
-    }
-    *field_idx = i;
-    return parse_int64(ap, field) ? PARSE_SUCCESS : PARSE_FAIL;
-}
-
-/*
- * Read file content from the beginning up to max_len bytes or EOF
- * whichever happens first.
- */
-static ssize_t read_all(int fd, char *buf, size_t max_len)
-{
-    ssize_t ret = 0;
-    off_t offset = 0;
-
-    while (max_len > 0) {
-        ssize_t r = TEMP_FAILURE_RETRY(pread(fd, buf, max_len, offset));
-        if (r == 0) {
-            break;
-        }
-        if (r == -1) {
-            return -1;
-        }
-        ret += r;
-        buf += r;
-        offset += r;
-        max_len -= r;
-    }
-
-    return ret;
-}
-
-/*
- * Read a new or already opened file from the beginning.
- * If the file has not been opened yet data->fd should be set to -1.
- * To be used with files which are read often and possibly during high
- * memory pressure to minimize file opening which by itself requires kernel
- * memory allocation and might result in a stall on memory stressed system.
- */
-static char *reread_file(struct reread_data *data) {
-    /* start with page-size buffer and increase if needed */
-    static ssize_t buf_size = PAGE_SIZE;
-    static char *new_buf, *buf = NULL;
-    ssize_t size;
-
-    if (data->fd == -1) {
-        /* First-time buffer initialization */
-        if (!buf && (buf = malloc(buf_size)) == NULL) {
-            return NULL;
-        }
-
-        data->fd = TEMP_FAILURE_RETRY(open(data->filename, O_RDONLY | O_CLOEXEC));
-        if (data->fd < 0) {
-            ALOGE("%s open: %s", data->filename, strerror(errno));
-            return NULL;
-        }
-    }
-
-    while (true) {
-        size = read_all(data->fd, buf, buf_size - 1);
-        if (size < 0) {
-            ALOGE("%s read: %s", data->filename, strerror(errno));
-            close(data->fd);
-            data->fd = -1;
-            return NULL;
-        }
-        if (size < buf_size - 1) {
-            break;
-        }
-        /*
-         * Since we are reading /proc files we can't use fstat to find out
-         * the real size of the file. Double the buffer size and keep retrying.
-         */
-        if ((new_buf = realloc(buf, buf_size * 2)) == NULL) {
-            errno = ENOMEM;
-            return NULL;
-        }
-        buf = new_buf;
-        buf_size *= 2;
-    }
-    buf[size] = 0;
-
-    return buf;
-}
-
-static struct proc *pid_lookup(int pid) {
-    struct proc *procp;
-
-    for (procp = pidhash[pid_hashfn(pid)]; procp && procp->pid != pid;
-         procp = procp->pidhash_next)
-            ;
-
-    return procp;
-}
-
-static void adjslot_insert(struct adjslot_list *head, struct adjslot_list *new)
-{
-    struct adjslot_list *next = head->next;
-    new->prev = head;
-    new->next = next;
-    next->prev = new;
-    head->next = new;
-}
-
-static void adjslot_remove(struct adjslot_list *old)
-{
-    struct adjslot_list *prev = old->prev;
-    struct adjslot_list *next = old->next;
-    next->prev = prev;
-    prev->next = next;
-}
-
-static struct adjslot_list *adjslot_tail(struct adjslot_list *head) {
-    struct adjslot_list *asl = head->prev;
-
-    return asl == head ? NULL : asl;
-}
-
-static void proc_slot(struct proc *procp) {
-    int adjslot = ADJTOSLOT(procp->oomadj);
-
-    adjslot_insert(&procadjslot_list[adjslot], &procp->asl);
-}
-
-static void proc_unslot(struct proc *procp) {
-    adjslot_remove(&procp->asl);
-}
-
-static void proc_insert(struct proc *procp) {
-    int hval = pid_hashfn(procp->pid);
-
-    procp->pidhash_next = pidhash[hval];
-    pidhash[hval] = procp;
-    proc_slot(procp);
-}
-
-static int pid_remove(int pid) {
-    int hval = pid_hashfn(pid);
-    struct proc *procp;
-    struct proc *prevp;
-
-    for (procp = pidhash[hval], prevp = NULL; procp && procp->pid != pid;
-         procp = procp->pidhash_next)
-            prevp = procp;
-
-    if (!procp)
-        return -1;
-
-    if (!prevp)
-        pidhash[hval] = procp->pidhash_next;
-    else
-        prevp->pidhash_next = procp->pidhash_next;
-
-    proc_unslot(procp);
-    /*
-     * Close pidfd here if we are not waiting for corresponding process to die,
-     * in which case stop_wait_for_proc_kill() will close the pidfd later
-     */
-    if (procp->pidfd >= 0 && procp->pidfd != last_kill_pid_or_fd) {
-        close(procp->pidfd);
-    }
-    free(procp);
-    return 0;
-}
-
-/*
- * Write a string to a file.
- * Returns false if the file does not exist.
- */
-static bool writefilestring(const char *path, const char *s,
-                            bool err_if_missing) {
-    int fd = open(path, O_WRONLY | O_CLOEXEC);
-    ssize_t len = strlen(s);
-    ssize_t ret;
-
-    if (fd < 0) {
-        if (err_if_missing) {
-            ALOGE("Error opening %s; errno=%d", path, errno);
-        }
-        return false;
-    }
-
-    ret = TEMP_FAILURE_RETRY(write(fd, s, len));
-    if (ret < 0) {
-        ALOGE("Error writing %s; errno=%d", path, errno);
-    } else if (ret < len) {
-        ALOGE("Short write on %s; length=%zd", path, ret);
-    }
-
-    close(fd);
-    return true;
-}
-
-static inline long get_time_diff_ms(struct timespec *from,
-                                    struct timespec *to) {
-    return (to->tv_sec - from->tv_sec) * (long)MS_PER_SEC +
-           (to->tv_nsec - from->tv_nsec) / (long)NS_PER_MS;
-}
-
-static int proc_get_tgid(int pid) {
-    char path[PATH_MAX];
-    char buf[PAGE_SIZE];
-    int fd;
-    ssize_t size;
-    char *pos;
-    int64_t tgid = -1;
-
-    snprintf(path, PATH_MAX, "/proc/%d/status", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd < 0) {
-        return -1;
-    }
-
-    size = read_all(fd, buf, sizeof(buf) - 1);
-    if (size < 0) {
-        goto out;
-    }
-    buf[size] = 0;
-
-    pos = buf;
-    while (true) {
-        pos = strstr(pos, PROC_STATUS_TGID_FIELD);
-        /* Stop if TGID tag not found or found at the line beginning */
-        if (pos == NULL || pos == buf || pos[-1] == '\n') {
-            break;
-        }
-        pos++;
-    }
-
-    if (pos == NULL) {
-        goto out;
-    }
-
-    pos += strlen(PROC_STATUS_TGID_FIELD);
-    while (*pos == ' ') pos++;
-    parse_int64(pos, &tgid);
-
-out:
-    close(fd);
-    return (int)tgid;
-}
-
-static int proc_get_size(int pid) {
-    char path[PATH_MAX];
-    char line[LINE_MAX];
-    int fd;
-    int rss = 0;
-    int total;
-    ssize_t ret;
-
-    /* gid containing AID_READPROC required */
-    snprintf(path, PATH_MAX, "/proc/%d/statm", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd == -1)
-        return -1;
-
-    ret = read_all(fd, line, sizeof(line) - 1);
-    if (ret < 0) {
-        close(fd);
-        return -1;
-    }
-    line[ret] = '\0';
-
-    sscanf(line, "%d %d ", &total, &rss);
-    close(fd);
-    return rss;
-}
-
-static char *proc_get_name(int pid, char *buf, size_t buf_size) {
-    char path[PATH_MAX];
-    int fd;
-    char *cp;
-    ssize_t ret;
-
-    /* gid containing AID_READPROC required */
-    snprintf(path, PATH_MAX, "/proc/%d/cmdline", pid);
-    fd = open(path, O_RDONLY | O_CLOEXEC);
-    if (fd == -1) {
-        return NULL;
-    }
-    ret = read_all(fd, buf, buf_size - 1);
-    close(fd);
-    if (ret < 0) {
-        return NULL;
-    }
-    buf[ret] = '\0';
-
-    cp = strchr(buf, ' ');
-    if (cp) {
-        *cp = '\0';
-    }
-
-    return buf;
-}
-
-static void cmd_procprio(LMKD_CTRL_PACKET packet) {
-    struct proc *procp;
-    char path[LINE_MAX];
-    char val[20];
-    int soft_limit_mult;
-    struct lmk_procprio params;
-    bool is_system_server;
-    struct passwd *pwdrec;
-    int tgid;
-
-    lmkd_pack_get_procprio(packet, &params);
-
-    if (params.oomadj < OOM_SCORE_ADJ_MIN ||
-        params.oomadj > OOM_SCORE_ADJ_MAX) {
-        ALOGE("Invalid PROCPRIO oomadj argument %d", params.oomadj);
-        return;
-    }
-
-    /* Check if registered process is a thread group leader */
-    tgid = proc_get_tgid(params.pid);
-    if (tgid >= 0 && tgid != params.pid) {
-        ALOGE("Attempt to register a task that is not a thread group leader (tid %d, tgid %d)",
-            params.pid, tgid);
-        return;
-    }
-
-    /* gid containing AID_READPROC required */
-    /* CAP_SYS_RESOURCE required */
-    /* CAP_DAC_OVERRIDE required */
-    snprintf(path, sizeof(path), "/proc/%d/oom_score_adj", params.pid);
-    snprintf(val, sizeof(val), "%d", params.oomadj);
-    if (!writefilestring(path, val, false)) {
-        ALOGW("Failed to open %s; errno=%d: process %d might have been killed",
-              path, errno, params.pid);
-        /* If this file does not exist the process is dead. */
-        return;
-    }
-
-    if (use_inkernel_interface) {
-        stats_store_taskname(params.pid, proc_get_name(params.pid, path, sizeof(path)),
-                             kpoll_info.poll_fd);
-        return;
-    }
-
-    if (per_app_memcg) {
-        if (params.oomadj >= 900) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 800) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 700) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 600) {
-            // Launcher should be perceptible, don't kill it.
-            params.oomadj = 200;
-            soft_limit_mult = 1;
-        } else if (params.oomadj >= 500) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 400) {
-            soft_limit_mult = 0;
-        } else if (params.oomadj >= 300) {
-            soft_limit_mult = 1;
-        } else if (params.oomadj >= 200) {
-            soft_limit_mult = 8;
-        } else if (params.oomadj >= 100) {
-            soft_limit_mult = 10;
-        } else if (params.oomadj >=   0) {
-            soft_limit_mult = 20;
-        } else {
-            // Persistent processes will have a large
-            // soft limit 512MB.
-            soft_limit_mult = 64;
-        }
-
-        snprintf(path, sizeof(path), MEMCG_SYSFS_PATH
-                 "apps/uid_%d/pid_%d/memory.soft_limit_in_bytes",
-                 params.uid, params.pid);
-        snprintf(val, sizeof(val), "%d", soft_limit_mult * EIGHT_MEGA);
-
-        /*
-         * system_server process has no memcg under /dev/memcg/apps but should be
-         * registered with lmkd. This is the best way so far to identify it.
-         */
-        is_system_server = (params.oomadj == SYSTEM_ADJ &&
-                            (pwdrec = getpwnam("system")) != NULL &&
-                            params.uid == pwdrec->pw_uid);
-        writefilestring(path, val, !is_system_server);
-    }
-
-    procp = pid_lookup(params.pid);
-    if (!procp) {
-        int pidfd = -1;
-
-        if (pidfd_supported) {
-            pidfd = TEMP_FAILURE_RETRY(sys_pidfd_open(params.pid, 0));
-            if (pidfd < 0) {
-                ALOGE("pidfd_open for pid %d failed; errno=%d", params.pid, errno);
-                return;
-            }
-        }
-
-        procp = calloc(1, sizeof(struct proc));
-        if (!procp) {
-            // Oh, the irony.  May need to rebuild our state.
-            return;
-        }
-
-        procp->pid = params.pid;
-        procp->pidfd = pidfd;
-        procp->uid = params.uid;
-        procp->oomadj = params.oomadj;
-        proc_insert(procp);
-    } else {
-        proc_unslot(procp);
-        procp->oomadj = params.oomadj;
-        proc_slot(procp);
-    }
-}
-
-static void cmd_procremove(LMKD_CTRL_PACKET packet) {
-    struct lmk_procremove params;
-
-    lmkd_pack_get_procremove(packet, &params);
-    if (use_inkernel_interface) {
-        stats_remove_taskname(params.pid, kpoll_info.poll_fd);
-        return;
-    }
-
-    /*
-     * WARNING: After pid_remove() procp is freed and can't be used!
-     * Therefore placed at the end of the function.
-     */
-    pid_remove(params.pid);
-}
-
-static void cmd_procpurge() {
-    int i;
-    struct proc *procp;
-    struct proc *next;
-
-    if (use_inkernel_interface) {
-        stats_purge_tasknames();
-        return;
-    }
-
-    for (i = 0; i <= ADJTOSLOT(OOM_SCORE_ADJ_MAX); i++) {
-        procadjslot_list[i].next = &procadjslot_list[i];
-        procadjslot_list[i].prev = &procadjslot_list[i];
-    }
-
-    for (i = 0; i < PIDHASH_SZ; i++) {
-        procp = pidhash[i];
-        while (procp) {
-            next = procp->pidhash_next;
-            free(procp);
-            procp = next;
-        }
-    }
-    memset(&pidhash[0], 0, sizeof(pidhash));
-}
-
-static void inc_killcnt(int oomadj) {
-    int slot = ADJTOSLOT(oomadj);
-    uint8_t idx = killcnt_idx[slot];
-
-    if (idx == KILLCNT_INVALID_IDX) {
-        /* index is not assigned for this oomadj */
-        if (killcnt_free_idx < MAX_DISTINCT_OOM_ADJ) {
-            killcnt_idx[slot] = killcnt_free_idx;
-            killcnt[killcnt_free_idx] = 1;
-            killcnt_free_idx++;
-        } else {
-            ALOGW("Number of distinct oomadj levels exceeds %d",
-                MAX_DISTINCT_OOM_ADJ);
-        }
-    } else {
-        /*
-         * wraparound is highly unlikely and is detectable using total
-         * counter because it has to be equal to the sum of all counters
-         */
-        killcnt[idx]++;
-    }
-    /* increment total kill counter */
-    killcnt_total++;
-}
-
-static int get_killcnt(int min_oomadj, int max_oomadj) {
-    int slot;
-    int count = 0;
-
-    if (min_oomadj > max_oomadj)
-        return 0;
-
-    /* special case to get total kill count */
-    if (min_oomadj > OOM_SCORE_ADJ_MAX)
-        return killcnt_total;
-
-    while (min_oomadj <= max_oomadj &&
-           (slot = ADJTOSLOT(min_oomadj)) < ADJTOSLOT_COUNT) {
-        uint8_t idx = killcnt_idx[slot];
-        if (idx != KILLCNT_INVALID_IDX) {
-            count += killcnt[idx];
-        }
-        min_oomadj++;
-    }
-
-    return count;
-}
-
-static int cmd_getkillcnt(LMKD_CTRL_PACKET packet) {
-    struct lmk_getkillcnt params;
-
-    if (use_inkernel_interface) {
-        /* kernel driver does not expose this information */
-        return 0;
-    }
-
-    lmkd_pack_get_getkillcnt(packet, &params);
-
-    return get_killcnt(params.min_oomadj, params.max_oomadj);
-}
-
-static void cmd_target(int ntargets, LMKD_CTRL_PACKET packet) {
-    int i;
-    struct lmk_target target;
-    char minfree_str[PROPERTY_VALUE_MAX];
-    char *pstr = minfree_str;
-    char *pend = minfree_str + sizeof(minfree_str);
-    static struct timespec last_req_tm;
-    struct timespec curr_tm;
-
-    if (ntargets < 1 || ntargets > (int)ARRAY_SIZE(lowmem_adj))
-        return;
-
-    /*
-     * Ratelimit minfree updates to once per TARGET_UPDATE_MIN_INTERVAL_MS
-     * to prevent DoS attacks
-     */
-    if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-        ALOGE("Failed to get current time");
-        return;
-    }
-
-    if (get_time_diff_ms(&last_req_tm, &curr_tm) <
-        TARGET_UPDATE_MIN_INTERVAL_MS) {
-        ALOGE("Ignoring frequent updated to lmkd limits");
-        return;
-    }
-
-    last_req_tm = curr_tm;
-
-    for (i = 0; i < ntargets; i++) {
-        lmkd_pack_get_target(packet, i, &target);
-        lowmem_minfree[i] = target.minfree;
-        lowmem_adj[i] = target.oom_adj_score;
-
-        pstr += snprintf(pstr, pend - pstr, "%d:%d,", target.minfree,
-            target.oom_adj_score);
-        if (pstr >= pend) {
-            /* if no more space in the buffer then terminate the loop */
-            pstr = pend;
-            break;
-        }
-    }
-
-    lowmem_targets_size = ntargets;
-
-    /* Override the last extra comma */
-    pstr[-1] = '\0';
-    property_set("sys.lmk.minfree_levels", minfree_str);
-
-    if (has_inkernel_module) {
-        char minfreestr[128];
-        char killpriostr[128];
-
-        minfreestr[0] = '\0';
-        killpriostr[0] = '\0';
-
-        for (i = 0; i < lowmem_targets_size; i++) {
-            char val[40];
-
-            if (i) {
-                strlcat(minfreestr, ",", sizeof(minfreestr));
-                strlcat(killpriostr, ",", sizeof(killpriostr));
-            }
-
-            snprintf(val, sizeof(val), "%d", use_inkernel_interface ? lowmem_minfree[i] : 0);
-            strlcat(minfreestr, val, sizeof(minfreestr));
-            snprintf(val, sizeof(val), "%d", use_inkernel_interface ? lowmem_adj[i] : 0);
-            strlcat(killpriostr, val, sizeof(killpriostr));
-        }
-
-        writefilestring(INKERNEL_MINFREE_PATH, minfreestr, true);
-        writefilestring(INKERNEL_ADJ_PATH, killpriostr, true);
-    }
-}
-
-static void ctrl_data_close(int dsock_idx) {
-    struct epoll_event epev;
-
-    ALOGI("closing lmkd data connection");
-    if (epoll_ctl(epollfd, EPOLL_CTL_DEL, data_sock[dsock_idx].sock, &epev) == -1) {
-        // Log a warning and keep going
-        ALOGW("epoll_ctl for data connection socket failed; errno=%d", errno);
-    }
-    maxevents--;
-
-    close(data_sock[dsock_idx].sock);
-    data_sock[dsock_idx].sock = -1;
-}
-
-static int ctrl_data_read(int dsock_idx, char *buf, size_t bufsz) {
-    int ret = 0;
-
-    ret = TEMP_FAILURE_RETRY(read(data_sock[dsock_idx].sock, buf, bufsz));
-
-    if (ret == -1) {
-        ALOGE("control data socket read failed; errno=%d", errno);
-    } else if (ret == 0) {
-        ALOGE("Got EOF on control data socket");
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static int ctrl_data_write(int dsock_idx, char *buf, size_t bufsz) {
-    int ret = 0;
-
-    ret = TEMP_FAILURE_RETRY(write(data_sock[dsock_idx].sock, buf, bufsz));
-
-    if (ret == -1) {
-        ALOGE("control data socket write failed; errno=%d", errno);
-    } else if (ret == 0) {
-        ALOGE("Got EOF on control data socket");
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static void ctrl_command_handler(int dsock_idx) {
-    LMKD_CTRL_PACKET packet;
-    int len;
-    enum lmk_cmd cmd;
-    int nargs;
-    int targets;
-    int kill_cnt;
-
-    len = ctrl_data_read(dsock_idx, (char *)packet, CTRL_PACKET_MAX_SIZE);
-    if (len <= 0)
-        return;
-
-    if (len < (int)sizeof(int)) {
-        ALOGE("Wrong control socket read length len=%d", len);
-        return;
-    }
-
-    cmd = lmkd_pack_get_cmd(packet);
-    nargs = len / sizeof(int) - 1;
-    if (nargs < 0)
-        goto wronglen;
-
-    switch(cmd) {
-    case LMK_TARGET:
-        targets = nargs / 2;
-        if (nargs & 0x1 || targets > (int)ARRAY_SIZE(lowmem_adj))
-            goto wronglen;
-        cmd_target(targets, packet);
-        break;
-    case LMK_PROCPRIO:
-        if (nargs != 3)
-            goto wronglen;
-        cmd_procprio(packet);
-        break;
-    case LMK_PROCREMOVE:
-        if (nargs != 1)
-            goto wronglen;
-        cmd_procremove(packet);
-        break;
-    case LMK_PROCPURGE:
-        if (nargs != 0)
-            goto wronglen;
-        cmd_procpurge();
-        break;
-    case LMK_GETKILLCNT:
-        if (nargs != 2)
-            goto wronglen;
-        kill_cnt = cmd_getkillcnt(packet);
-        len = lmkd_pack_set_getkillcnt_repl(packet, kill_cnt);
-        if (ctrl_data_write(dsock_idx, (char *)packet, len) != len)
-            return;
-        break;
-    default:
-        ALOGE("Received unknown command code %d", cmd);
-        return;
-    }
-
-    return;
-
-wronglen:
-    ALOGE("Wrong control socket read length cmd=%d len=%d", cmd, len);
-}
-
-static void ctrl_data_handler(int data, uint32_t events,
-                              struct polling_params *poll_params __unused) {
-    if (events & EPOLLIN) {
-        ctrl_command_handler(data);
-    }
-}
-
-static int get_free_dsock() {
-    for (int i = 0; i < MAX_DATA_CONN; i++) {
-        if (data_sock[i].sock < 0) {
-            return i;
-        }
-    }
-    return -1;
-}
-
-static void ctrl_connect_handler(int data __unused, uint32_t events __unused,
-                                 struct polling_params *poll_params __unused) {
-    struct epoll_event epev;
-    int free_dscock_idx = get_free_dsock();
-
-    if (free_dscock_idx < 0) {
-        /*
-         * Number of data connections exceeded max supported. This should not
-         * happen but if it does we drop all existing connections and accept
-         * the new one. This prevents inactive connections from monopolizing
-         * data socket and if we drop ActivityManager connection it will
-         * immediately reconnect.
-         */
-        for (int i = 0; i < MAX_DATA_CONN; i++) {
-            ctrl_data_close(i);
-        }
-        free_dscock_idx = 0;
-    }
-
-    data_sock[free_dscock_idx].sock = accept(ctrl_sock.sock, NULL, NULL);
-    if (data_sock[free_dscock_idx].sock < 0) {
-        ALOGE("lmkd control socket accept failed; errno=%d", errno);
-        return;
-    }
-
-    ALOGI("lmkd data connection established");
-    /* use data to store data connection idx */
-    data_sock[free_dscock_idx].handler_info.data = free_dscock_idx;
-    data_sock[free_dscock_idx].handler_info.handler = ctrl_data_handler;
-    epev.events = EPOLLIN;
-    epev.data.ptr = (void *)&(data_sock[free_dscock_idx].handler_info);
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, data_sock[free_dscock_idx].sock, &epev) == -1) {
-        ALOGE("epoll_ctl for data connection socket failed; errno=%d", errno);
-        ctrl_data_close(free_dscock_idx);
-        return;
-    }
-    maxevents++;
-}
-
-/*
- * /proc/zoneinfo parsing routines
- * Expected file format is:
- *
- *   Node <node_id>, zone   <zone_name>
- *   (
- *    per-node stats
- *       (<per-node field name> <value>)+
- *   )?
- *   (pages free     <value>
- *       (<per-zone field name> <value>)+
- *    pagesets
- *       (<unused fields>)*
- *   )+
- *   ...
- */
-static void zoneinfo_parse_protection(char *buf, struct zoneinfo_zone *zone) {
-    int zone_idx;
-    int64_t max = 0;
-    char *save_ptr;
-
-    for (buf = strtok_r(buf, "(), ", &save_ptr), zone_idx = 0;
-         buf && zone_idx < MAX_NR_ZONES;
-         buf = strtok_r(NULL, "), ", &save_ptr), zone_idx++) {
-        long long zoneval = strtoll(buf, &buf, 0);
-        if (zoneval > max) {
-            max = (zoneval > INT64_MAX) ? INT64_MAX : zoneval;
-        }
-        zone->protection[zone_idx] = zoneval;
-    }
-    zone->max_protection = max;
-}
-
-static int zoneinfo_parse_zone(char **buf, struct zoneinfo_zone *zone) {
-    for (char *line = strtok_r(NULL, "\n", buf); line;
-         line = strtok_r(NULL, "\n", buf)) {
-        char *cp;
-        char *ap;
-        char *save_ptr;
-        int64_t val;
-        int field_idx;
-        enum field_match_result match_res;
-
-        cp = strtok_r(line, " ", &save_ptr);
-        if (!cp) {
-            return false;
-        }
-
-        field_idx = find_field(cp, zoneinfo_zone_spec_field_names, ZI_ZONE_SPEC_FIELD_COUNT);
-        if (field_idx >= 0) {
-            /* special field */
-            if (field_idx == ZI_ZONE_SPEC_PAGESETS) {
-                /* no mode fields we are interested in */
-                return true;
-            }
-
-            /* protection field */
-            ap = strtok_r(NULL, ")", &save_ptr);
-            if (ap) {
-                zoneinfo_parse_protection(ap, zone);
-            }
-            continue;
-        }
-
-        ap = strtok_r(NULL, " ", &save_ptr);
-        if (!ap) {
-            continue;
-        }
-
-        match_res = match_field(cp, ap, zoneinfo_zone_field_names, ZI_ZONE_FIELD_COUNT,
-            &val, &field_idx);
-        if (match_res == PARSE_FAIL) {
-            return false;
-        }
-        if (match_res == PARSE_SUCCESS) {
-            zone->fields.arr[field_idx] = val;
-        }
-        if (field_idx == ZI_ZONE_PRESENT && val == 0) {
-            /* zone is not populated, stop parsing it */
-            return true;
-        }
-    }
-    return false;
-}
-
-static int zoneinfo_parse_node(char **buf, struct zoneinfo_node *node) {
-    int fields_to_match = ZI_NODE_FIELD_COUNT;
-
-    for (char *line = strtok_r(NULL, "\n", buf); line;
-         line = strtok_r(NULL, "\n", buf)) {
-        char *cp;
-        char *ap;
-        char *save_ptr;
-        int64_t val;
-        int field_idx;
-        enum field_match_result match_res;
-
-        cp = strtok_r(line, " ", &save_ptr);
-        if (!cp) {
-            return false;
-        }
-
-        ap = strtok_r(NULL, " ", &save_ptr);
-        if (!ap) {
-            return false;
-        }
-
-        match_res = match_field(cp, ap, zoneinfo_node_field_names, ZI_NODE_FIELD_COUNT,
-            &val, &field_idx);
-        if (match_res == PARSE_FAIL) {
-            return false;
-        }
-        if (match_res == PARSE_SUCCESS) {
-            node->fields.arr[field_idx] = val;
-            fields_to_match--;
-            if (!fields_to_match) {
-                return true;
-            }
-        }
-    }
-    return false;
-}
-
-static int zoneinfo_parse(struct zoneinfo *zi) {
-    static struct reread_data file_data = {
-        .filename = ZONEINFO_PATH,
-        .fd = -1,
-    };
-    char *buf;
-    char *save_ptr;
-    char *line;
-    char zone_name[LINE_MAX + 1];
-    struct zoneinfo_node *node = NULL;
-    int node_idx = 0;
-    int zone_idx = 0;
-
-    memset(zi, 0, sizeof(struct zoneinfo));
-
-    if ((buf = reread_file(&file_data)) == NULL) {
-        return -1;
-    }
-
-    for (line = strtok_r(buf, "\n", &save_ptr); line;
-         line = strtok_r(NULL, "\n", &save_ptr)) {
-        int node_id;
-        if (sscanf(line, "Node %d, zone %" STRINGIFY(LINE_MAX) "s", &node_id, zone_name) == 2) {
-            if (!node || node->id != node_id) {
-                /* new node is found */
-                if (node) {
-                    node->zone_count = zone_idx + 1;
-                    node_idx++;
-                    if (node_idx == MAX_NR_NODES) {
-                        /* max node count exceeded */
-                        ALOGE("%s parse error", file_data.filename);
-                        return -1;
-                    }
-                }
-                node = &zi->nodes[node_idx];
-                node->id = node_id;
-                zone_idx = 0;
-                if (!zoneinfo_parse_node(&save_ptr, node)) {
-                    ALOGE("%s parse error", file_data.filename);
-                    return -1;
-                }
-            } else {
-                /* new zone is found */
-                zone_idx++;
-            }
-            if (!zoneinfo_parse_zone(&save_ptr, &node->zones[zone_idx])) {
-                ALOGE("%s parse error", file_data.filename);
-                return -1;
-            }
-        }
-    }
-    if (!node) {
-        ALOGE("%s parse error", file_data.filename);
-        return -1;
-    }
-    node->zone_count = zone_idx + 1;
-    zi->node_count = node_idx + 1;
-
-    /* calculate totals fields */
-    for (node_idx = 0; node_idx < zi->node_count; node_idx++) {
-        node = &zi->nodes[node_idx];
-        for (zone_idx = 0; zone_idx < node->zone_count; zone_idx++) {
-            struct zoneinfo_zone *zone = &zi->nodes[node_idx].zones[zone_idx];
-            zi->totalreserve_pages += zone->max_protection + zone->fields.field.high;
-        }
-        zi->total_inactive_file += node->fields.field.nr_inactive_file;
-        zi->total_active_file += node->fields.field.nr_active_file;
-        zi->total_workingset_refault += node->fields.field.workingset_refault;
-    }
-    return 0;
-}
-
-/* /proc/meminfo parsing routines */
-static bool meminfo_parse_line(char *line, union meminfo *mi) {
-    char *cp = line;
-    char *ap;
-    char *save_ptr;
-    int64_t val;
-    int field_idx;
-    enum field_match_result match_res;
-
-    cp = strtok_r(line, " ", &save_ptr);
-    if (!cp) {
-        return false;
-    }
-
-    ap = strtok_r(NULL, " ", &save_ptr);
-    if (!ap) {
-        return false;
-    }
-
-    match_res = match_field(cp, ap, meminfo_field_names, MI_FIELD_COUNT,
-        &val, &field_idx);
-    if (match_res == PARSE_SUCCESS) {
-        mi->arr[field_idx] = val / page_k;
-    }
-    return (match_res != PARSE_FAIL);
-}
-
-static int meminfo_parse(union meminfo *mi) {
-    static struct reread_data file_data = {
-        .filename = MEMINFO_PATH,
-        .fd = -1,
-    };
-    char *buf;
-    char *save_ptr;
-    char *line;
-
-    memset(mi, 0, sizeof(union meminfo));
-
-    if ((buf = reread_file(&file_data)) == NULL) {
-        return -1;
-    }
-
-    for (line = strtok_r(buf, "\n", &save_ptr); line;
-         line = strtok_r(NULL, "\n", &save_ptr)) {
-        if (!meminfo_parse_line(line, mi)) {
-            ALOGE("%s parse error", file_data.filename);
-            return -1;
-        }
-    }
-    mi->field.nr_file_pages = mi->field.cached + mi->field.swap_cached +
-        mi->field.buffers;
-
-    return 0;
-}
-
-/* /proc/vmstat parsing routines */
-static bool vmstat_parse_line(char *line, union vmstat *vs) {
-    char *cp;
-    char *ap;
-    char *save_ptr;
-    int64_t val;
-    int field_idx;
-    enum field_match_result match_res;
-
-    cp = strtok_r(line, " ", &save_ptr);
-    if (!cp) {
-        return false;
-    }
-
-    ap = strtok_r(NULL, " ", &save_ptr);
-    if (!ap) {
-        return false;
-    }
-
-    match_res = match_field(cp, ap, vmstat_field_names, VS_FIELD_COUNT,
-        &val, &field_idx);
-    if (match_res == PARSE_SUCCESS) {
-        vs->arr[field_idx] = val;
-    }
-    return (match_res != PARSE_FAIL);
-}
-
-static int vmstat_parse(union vmstat *vs) {
-    static struct reread_data file_data = {
-        .filename = VMSTAT_PATH,
-        .fd = -1,
-    };
-    char *buf;
-    char *save_ptr;
-    char *line;
-
-    memset(vs, 0, sizeof(union vmstat));
-
-    if ((buf = reread_file(&file_data)) == NULL) {
-        return -1;
-    }
-
-    for (line = strtok_r(buf, "\n", &save_ptr); line;
-         line = strtok_r(NULL, "\n", &save_ptr)) {
-        if (!vmstat_parse_line(line, vs)) {
-            ALOGE("%s parse error", file_data.filename);
-            return -1;
-        }
-    }
-
-    return 0;
-}
-
-static void killinfo_log(struct proc* procp, int min_oom_score, int tasksize,
-                         int kill_reason, union meminfo *mi) {
-    /* log process information */
-    android_log_write_int32(ctx, procp->pid);
-    android_log_write_int32(ctx, procp->uid);
-    android_log_write_int32(ctx, procp->oomadj);
-    android_log_write_int32(ctx, min_oom_score);
-    android_log_write_int32(ctx, (int32_t)min(tasksize * page_k, INT32_MAX));
-    android_log_write_int32(ctx, kill_reason);
-
-    /* log meminfo fields */
-    for (int field_idx = 0; field_idx < MI_FIELD_COUNT; field_idx++) {
-        android_log_write_int32(ctx, (int32_t)min(mi->arr[field_idx] * page_k, INT32_MAX));
-    }
-
-    android_log_write_list(ctx, LOG_ID_EVENTS);
-    android_log_reset(ctx);
-}
-
-static struct proc *proc_adj_lru(int oomadj) {
-    return (struct proc *)adjslot_tail(&procadjslot_list[ADJTOSLOT(oomadj)]);
-}
-
-static struct proc *proc_get_heaviest(int oomadj) {
-    struct adjslot_list *head = &procadjslot_list[ADJTOSLOT(oomadj)];
-    struct adjslot_list *curr = head->next;
-    struct proc *maxprocp = NULL;
-    int maxsize = 0;
-    while (curr != head) {
-        int pid = ((struct proc *)curr)->pid;
-        int tasksize = proc_get_size(pid);
-        if (tasksize <= 0) {
-            struct adjslot_list *next = curr->next;
-            pid_remove(pid);
-            curr = next;
-        } else {
-            if (tasksize > maxsize) {
-                maxsize = tasksize;
-                maxprocp = (struct proc *)curr;
-            }
-            curr = curr->next;
-        }
-    }
-    return maxprocp;
-}
-
-static void set_process_group_and_prio(int pid, SchedPolicy sp, int prio) {
-    DIR* d;
-    char proc_path[PATH_MAX];
-    struct dirent* de;
-
-    snprintf(proc_path, sizeof(proc_path), "/proc/%d/task", pid);
-    if (!(d = opendir(proc_path))) {
-        ALOGW("Failed to open %s; errno=%d: process pid(%d) might have died", proc_path, errno,
-              pid);
-        return;
-    }
-
-    while ((de = readdir(d))) {
-        int t_pid;
-
-        if (de->d_name[0] == '.') continue;
-        t_pid = atoi(de->d_name);
-
-        if (!t_pid) {
-            ALOGW("Failed to get t_pid for '%s' of pid(%d)", de->d_name, pid);
-            continue;
-        }
-
-        if (setpriority(PRIO_PROCESS, t_pid, prio) && errno != ESRCH) {
-            ALOGW("Unable to raise priority of killing t_pid (%d): errno=%d", t_pid, errno);
-        }
-
-        if (set_cpuset_policy(t_pid, sp)) {
-            ALOGW("Failed to set_cpuset_policy on pid(%d) t_pid(%d) to %d", pid, t_pid, (int)sp);
-            continue;
-        }
-    }
-    closedir(d);
-}
-
-static bool is_kill_pending(void) {
-    char buf[24];
-
-    if (last_kill_pid_or_fd < 0) {
-        return false;
-    }
-
-    if (pidfd_supported) {
-        return true;
-    }
-
-    /* when pidfd is not supported base the decision on /proc/<pid> existence */
-    snprintf(buf, sizeof(buf), "/proc/%d/", last_kill_pid_or_fd);
-    if (access(buf, F_OK) == 0) {
-        return true;
-    }
-
-    return false;
-}
-
-static bool is_waiting_for_kill(void) {
-    return pidfd_supported && last_kill_pid_or_fd >= 0;
-}
-
-static void stop_wait_for_proc_kill(bool finished) {
-    struct epoll_event epev;
-
-    if (last_kill_pid_or_fd < 0) {
-        return;
-    }
-
-    if (debug_process_killing) {
-        struct timespec curr_tm;
-
-        if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-            /*
-             * curr_tm is used here merely to report kill duration, so this failure is not fatal.
-             * Log an error and continue.
-             */
-            ALOGE("Failed to get current time");
-        }
-
-        if (finished) {
-            ALOGI("Process got killed in %ldms",
-                get_time_diff_ms(&last_kill_tm, &curr_tm));
-        } else {
-            ALOGI("Stop waiting for process kill after %ldms",
-                get_time_diff_ms(&last_kill_tm, &curr_tm));
-        }
-    }
-
-    if (pidfd_supported) {
-        /* unregister fd */
-        if (epoll_ctl(epollfd, EPOLL_CTL_DEL, last_kill_pid_or_fd, &epev) != 0) {
-            ALOGE("epoll_ctl for last killed process failed; errno=%d", errno);
-            return;
-        }
-        maxevents--;
-        close(last_kill_pid_or_fd);
-    }
-
-    last_kill_pid_or_fd = -1;
-}
-
-static void kill_done_handler(int data __unused, uint32_t events __unused,
-                              struct polling_params *poll_params) {
-    stop_wait_for_proc_kill(true);
-    poll_params->update = POLLING_RESUME;
-}
-
-static void start_wait_for_proc_kill(int pid_or_fd) {
-    static struct event_handler_info kill_done_hinfo = { 0, kill_done_handler };
-    struct epoll_event epev;
-
-    if (last_kill_pid_or_fd >= 0) {
-        /* Should not happen but if it does we should stop previous wait */
-        ALOGE("Attempt to wait for a kill while another wait is in progress");
-        stop_wait_for_proc_kill(false);
-    }
-
-    last_kill_pid_or_fd = pid_or_fd;
-
-    if (!pidfd_supported) {
-        /* If pidfd is not supported just store PID and exit */
-        return;
-    }
-
-    epev.events = EPOLLIN;
-    epev.data.ptr = (void *)&kill_done_hinfo;
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, last_kill_pid_or_fd, &epev) != 0) {
-        ALOGE("epoll_ctl for last kill failed; errno=%d", errno);
-        close(last_kill_pid_or_fd);
-        last_kill_pid_or_fd = -1;
-        return;
-    }
-    maxevents++;
-}
-
-/* Kill one process specified by procp.  Returns the size of the process killed */
-static int kill_one_process(struct proc* procp, int min_oom_score, int kill_reason,
-                            const char *kill_desc, union meminfo *mi, struct timespec *tm) {
-    int pid = procp->pid;
-    int pidfd = procp->pidfd;
-    uid_t uid = procp->uid;
-    int tgid;
-    char *taskname;
-    int tasksize;
-    int r;
-    int result = -1;
-    struct memory_stat *mem_st;
-    char buf[LINE_MAX];
-
-    tgid = proc_get_tgid(pid);
-    if (tgid >= 0 && tgid != pid) {
-        ALOGE("Possible pid reuse detected (pid %d, tgid %d)!", pid, tgid);
-        goto out;
-    }
-
-    taskname = proc_get_name(pid, buf, sizeof(buf));
-    if (!taskname) {
-        goto out;
-    }
-
-    tasksize = proc_get_size(pid);
-    if (tasksize <= 0) {
-        goto out;
-    }
-
-    mem_st = stats_read_memory_stat(per_app_memcg, pid, uid);
-
-    TRACE_KILL_START(pid);
-
-    /* CAP_KILL required */
-    if (pidfd < 0) {
-        start_wait_for_proc_kill(pid);
-        r = kill(pid, SIGKILL);
-    } else {
-        start_wait_for_proc_kill(pidfd);
-        r = sys_pidfd_send_signal(pidfd, SIGKILL, NULL, 0);
-    }
-
-    TRACE_KILL_END();
-
-    if (r) {
-        stop_wait_for_proc_kill(false);
-        ALOGE("kill(%d): errno=%d", pid, errno);
-        /* Delete process record even when we fail to kill so that we don't get stuck on it */
-        goto out;
-    }
-
-    set_process_group_and_prio(pid, SP_FOREGROUND, ANDROID_PRIORITY_HIGHEST);
-
-    last_kill_tm = *tm;
-
-    inc_killcnt(procp->oomadj);
-
-    killinfo_log(procp, min_oom_score, tasksize, kill_reason, mi);
-
-    if (kill_desc) {
-        ALOGI("Kill '%s' (%d), uid %d, oom_adj %d to free %ldkB; reason: %s", taskname, pid,
-              uid, procp->oomadj, tasksize * page_k, kill_desc);
-    } else {
-        ALOGI("Kill '%s' (%d), uid %d, oom_adj %d to free %ldkB", taskname, pid,
-              uid, procp->oomadj, tasksize * page_k);
-    }
-
-    stats_write_lmk_kill_occurred(LMK_KILL_OCCURRED, uid, taskname,
-            procp->oomadj, min_oom_score, tasksize, mem_st);
-
-    result = tasksize;
-
-out:
-    /*
-     * WARNING: After pid_remove() procp is freed and can't be used!
-     * Therefore placed at the end of the function.
-     */
-    pid_remove(pid);
-    return result;
-}
-
-/*
- * Find one process to kill at or above the given oom_adj level.
- * Returns size of the killed process.
- */
-static int find_and_kill_process(int min_score_adj, int kill_reason, const char *kill_desc,
-                                 union meminfo *mi, struct timespec *tm) {
-    int i;
-    int killed_size = 0;
-    bool lmk_state_change_start = false;
-
-    for (i = OOM_SCORE_ADJ_MAX; i >= min_score_adj; i--) {
-        struct proc *procp;
-
-        while (true) {
-            procp = kill_heaviest_task ?
-                proc_get_heaviest(i) : proc_adj_lru(i);
-
-            if (!procp)
-                break;
-
-            killed_size = kill_one_process(procp, min_score_adj, kill_reason, kill_desc, mi, tm);
-            if (killed_size >= 0) {
-                if (!lmk_state_change_start) {
-                    lmk_state_change_start = true;
-                    stats_write_lmk_state_changed(LMK_STATE_CHANGED,
-                                                  LMK_STATE_CHANGE_START);
-                }
-                break;
-            }
-        }
-        if (killed_size) {
-            break;
-        }
-    }
-
-    if (lmk_state_change_start) {
-        stats_write_lmk_state_changed(LMK_STATE_CHANGED, LMK_STATE_CHANGE_STOP);
-    }
-
-    return killed_size;
-}
-
-static int64_t get_memory_usage(struct reread_data *file_data) {
-    int ret;
-    int64_t mem_usage;
-    char *buf;
-
-    if ((buf = reread_file(file_data)) == NULL) {
-        return -1;
-    }
-
-    if (!parse_int64(buf, &mem_usage)) {
-        ALOGE("%s parse error", file_data->filename);
-        return -1;
-    }
-    if (mem_usage == 0) {
-        ALOGE("No memory!");
-        return -1;
-    }
-    return mem_usage;
-}
-
-void record_low_pressure_levels(union meminfo *mi) {
-    if (low_pressure_mem.min_nr_free_pages == -1 ||
-        low_pressure_mem.min_nr_free_pages > mi->field.nr_free_pages) {
-        if (debug_process_killing) {
-            ALOGI("Low pressure min memory update from %" PRId64 " to %" PRId64,
-                low_pressure_mem.min_nr_free_pages, mi->field.nr_free_pages);
-        }
-        low_pressure_mem.min_nr_free_pages = mi->field.nr_free_pages;
-    }
-    /*
-     * Free memory at low vmpressure events occasionally gets spikes,
-     * possibly a stale low vmpressure event with memory already
-     * freed up (no memory pressure should have been reported).
-     * Ignore large jumps in max_nr_free_pages that would mess up our stats.
-     */
-    if (low_pressure_mem.max_nr_free_pages == -1 ||
-        (low_pressure_mem.max_nr_free_pages < mi->field.nr_free_pages &&
-         mi->field.nr_free_pages - low_pressure_mem.max_nr_free_pages <
-         low_pressure_mem.max_nr_free_pages * 0.1)) {
-        if (debug_process_killing) {
-            ALOGI("Low pressure max memory update from %" PRId64 " to %" PRId64,
-                low_pressure_mem.max_nr_free_pages, mi->field.nr_free_pages);
-        }
-        low_pressure_mem.max_nr_free_pages = mi->field.nr_free_pages;
-    }
-}
-
-enum vmpressure_level upgrade_level(enum vmpressure_level level) {
-    return (enum vmpressure_level)((level < VMPRESS_LEVEL_CRITICAL) ?
-        level + 1 : level);
-}
-
-enum vmpressure_level downgrade_level(enum vmpressure_level level) {
-    return (enum vmpressure_level)((level > VMPRESS_LEVEL_LOW) ?
-        level - 1 : level);
-}
-
-enum zone_watermark {
-    WMARK_MIN = 0,
-    WMARK_LOW,
-    WMARK_HIGH,
-    WMARK_NONE
-};
-
-struct zone_watermarks {
-    long high_wmark;
-    long low_wmark;
-    long min_wmark;
-};
-
-/*
- * Returns lowest breached watermark or WMARK_NONE.
- */
-static enum zone_watermark get_lowest_watermark(union meminfo *mi,
-                                                struct zone_watermarks *watermarks)
-{
-    int64_t nr_free_pages = mi->field.nr_free_pages - mi->field.cma_free;
-
-    if (nr_free_pages < watermarks->min_wmark) {
-        return WMARK_MIN;
-    }
-    if (nr_free_pages < watermarks->low_wmark) {
-        return WMARK_LOW;
-    }
-    if (nr_free_pages < watermarks->high_wmark) {
-        return WMARK_HIGH;
-    }
-    return WMARK_NONE;
-}
-
-void calc_zone_watermarks(struct zoneinfo *zi, struct zone_watermarks *watermarks) {
-    memset(watermarks, 0, sizeof(struct zone_watermarks));
-
-    for (int node_idx = 0; node_idx < zi->node_count; node_idx++) {
-        struct zoneinfo_node *node = &zi->nodes[node_idx];
-        for (int zone_idx = 0; zone_idx < node->zone_count; zone_idx++) {
-            struct zoneinfo_zone *zone = &node->zones[zone_idx];
-
-            if (!zone->fields.field.present) {
-                continue;
-            }
-
-            watermarks->high_wmark += zone->max_protection + zone->fields.field.high;
-            watermarks->low_wmark += zone->max_protection + zone->fields.field.low;
-            watermarks->min_wmark += zone->max_protection + zone->fields.field.min;
-        }
-    }
-}
-
-static void mp_event_psi(int data, uint32_t events, struct polling_params *poll_params) {
-    enum kill_reasons {
-        NONE = -1, /* To denote no kill condition */
-        PRESSURE_AFTER_KILL = 0,
-        NOT_RESPONDING,
-        LOW_SWAP_AND_THRASHING,
-        LOW_MEM_AND_SWAP,
-        LOW_MEM_AND_THRASHING,
-        DIRECT_RECL_AND_THRASHING,
-        KILL_REASON_COUNT
-    };
-    enum reclaim_state {
-        NO_RECLAIM = 0,
-        KSWAPD_RECLAIM,
-        DIRECT_RECLAIM,
-    };
-    static int64_t init_ws_refault;
-    static int64_t base_file_lru;
-    static int64_t init_pgscan_kswapd;
-    static int64_t init_pgscan_direct;
-    static int64_t swap_low_threshold;
-    static bool killing;
-    static int thrashing_limit;
-    static bool in_reclaim;
-    static struct zone_watermarks watermarks;
-    static struct timespec wmark_update_tm;
-
-    union meminfo mi;
-    union vmstat vs;
-    struct timespec curr_tm;
-    int64_t thrashing = 0;
-    bool swap_is_low = false;
-    enum vmpressure_level level = (enum vmpressure_level)data;
-    enum kill_reasons kill_reason = NONE;
-    bool cycle_after_kill = false;
-    enum reclaim_state reclaim = NO_RECLAIM;
-    enum zone_watermark wmark = WMARK_NONE;
-    char kill_desc[LINE_MAX];
-    bool cut_thrashing_limit = false;
-    int min_score_adj = 0;
-
-    /* Skip while still killing a process */
-    if (is_kill_pending()) {
-        goto no_kill;
-    }
-    /*
-     * Process is dead, stop waiting. This has no effect if pidfds are supported and
-     * death notification already caused waiting to stop.
-     */
-    stop_wait_for_proc_kill(true);
-
-    if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-        ALOGE("Failed to get current time");
-        return;
-    }
-
-    if (vmstat_parse(&vs) < 0) {
-        ALOGE("Failed to parse vmstat!");
-        return;
-    }
-
-    if (meminfo_parse(&mi) < 0) {
-        ALOGE("Failed to parse meminfo!");
-        return;
-    }
-
-    /* Reset states after process got killed */
-    if (killing) {
-        killing = false;
-        cycle_after_kill = true;
-        /* Reset file-backed pagecache size and refault amounts after a kill */
-        base_file_lru = vs.field.nr_inactive_file + vs.field.nr_active_file;
-        init_ws_refault = vs.field.workingset_refault;
-    }
-
-    /* Check free swap levels */
-    if (swap_free_low_percentage) {
-        if (!swap_low_threshold) {
-            swap_low_threshold = mi.field.total_swap * swap_free_low_percentage / 100;
-        }
-        swap_is_low = mi.field.free_swap < swap_low_threshold;
-    }
-
-    /* Identify reclaim state */
-    if (vs.field.pgscan_direct > init_pgscan_direct) {
-        init_pgscan_direct = vs.field.pgscan_direct;
-        init_pgscan_kswapd = vs.field.pgscan_kswapd;
-        reclaim = DIRECT_RECLAIM;
-    } else if (vs.field.pgscan_kswapd > init_pgscan_kswapd) {
-        init_pgscan_kswapd = vs.field.pgscan_kswapd;
-        reclaim = KSWAPD_RECLAIM;
-    } else {
-        in_reclaim = false;
-        /* Skip if system is not reclaiming */
-        goto no_kill;
-    }
-
-    if (!in_reclaim) {
-        /* Record file-backed pagecache size when entering reclaim cycle */
-        base_file_lru = vs.field.nr_inactive_file + vs.field.nr_active_file;
-        init_ws_refault = vs.field.workingset_refault;
-        thrashing_limit = thrashing_limit_pct;
-    } else {
-        /* Calculate what % of the file-backed pagecache refaulted so far */
-        thrashing = (vs.field.workingset_refault - init_ws_refault) * 100 / base_file_lru;
-    }
-    in_reclaim = true;
-
-    /*
-     * Refresh watermarks once per min in case user updated one of the margins.
-     * TODO: b/140521024 replace this periodic update with an API for AMS to notify LMKD
-     * that zone watermarks were changed by the system software.
-     */
-    if (watermarks.high_wmark == 0 || get_time_diff_ms(&wmark_update_tm, &curr_tm) > 60000) {
-        struct zoneinfo zi;
-
-        if (zoneinfo_parse(&zi) < 0) {
-            ALOGE("Failed to parse zoneinfo!");
-            return;
-        }
-
-        calc_zone_watermarks(&zi, &watermarks);
-        wmark_update_tm = curr_tm;
-     }
-
-    /* Find out which watermark is breached if any */
-    wmark = get_lowest_watermark(&mi, &watermarks);
-
-    /*
-     * TODO: move this logic into a separate function
-     * Decide if killing a process is necessary and record the reason
-     */
-    if (cycle_after_kill && wmark < WMARK_LOW) {
-        /*
-         * Prevent kills not freeing enough memory which might lead to OOM kill.
-         * This might happen when a process is consuming memory faster than reclaim can
-         * free even after a kill. Mostly happens when running memory stress tests.
-         */
-        kill_reason = PRESSURE_AFTER_KILL;
-        strncpy(kill_desc, "min watermark is breached even after kill", sizeof(kill_desc));
-    } else if (level == VMPRESS_LEVEL_CRITICAL && events != 0) {
-        /*
-         * Device is too busy reclaiming memory which might lead to ANR.
-         * Critical level is triggered when PSI complete stall (all tasks are blocked because
-         * of the memory congestion) breaches the configured threshold.
-         */
-        kill_reason = NOT_RESPONDING;
-        strncpy(kill_desc, "device is not responding", sizeof(kill_desc));
-    } else if (swap_is_low && thrashing > thrashing_limit_pct) {
-        /* Page cache is thrashing while swap is low */
-        kill_reason = LOW_SWAP_AND_THRASHING;
-        snprintf(kill_desc, sizeof(kill_desc), "device is low on swap (%" PRId64
-            "kB < %" PRId64 "kB) and thrashing (%" PRId64 "%%)",
-            mi.field.free_swap * page_k, swap_low_threshold * page_k, thrashing);
-    } else if (swap_is_low && wmark < WMARK_HIGH) {
-        /* Both free memory and swap are low */
-        kill_reason = LOW_MEM_AND_SWAP;
-        snprintf(kill_desc, sizeof(kill_desc), "%s watermark is breached and swap is low (%"
-            PRId64 "kB < %" PRId64 "kB)", wmark > WMARK_LOW ? "min" : "low",
-            mi.field.free_swap * page_k, swap_low_threshold * page_k);
-    } else if (wmark < WMARK_HIGH && thrashing > thrashing_limit) {
-        /* Page cache is thrashing while memory is low */
-        kill_reason = LOW_MEM_AND_THRASHING;
-        snprintf(kill_desc, sizeof(kill_desc), "%s watermark is breached and thrashing (%"
-            PRId64 "%%)", wmark > WMARK_LOW ? "min" : "low", thrashing);
-        cut_thrashing_limit = true;
-        /* Do not kill perceptible apps because of thrashing */
-        min_score_adj = PERCEPTIBLE_APP_ADJ;
-    } else if (reclaim == DIRECT_RECLAIM && thrashing > thrashing_limit) {
-        /* Page cache is thrashing while in direct reclaim (mostly happens on lowram devices) */
-        kill_reason = DIRECT_RECL_AND_THRASHING;
-        snprintf(kill_desc, sizeof(kill_desc), "device is in direct reclaim and thrashing (%"
-            PRId64 "%%)", thrashing);
-        cut_thrashing_limit = true;
-        /* Do not kill perceptible apps because of thrashing */
-        min_score_adj = PERCEPTIBLE_APP_ADJ;
-    }
-
-    /* Kill a process if necessary */
-    if (kill_reason != NONE) {
-        int pages_freed = find_and_kill_process(min_score_adj, kill_reason, kill_desc, &mi,
-                                                &curr_tm);
-        if (pages_freed > 0) {
-            killing = true;
-            if (cut_thrashing_limit) {
-                /*
-                 * Cut thrasing limit by thrashing_limit_decay_pct percentage of the current
-                 * thrashing limit until the system stops thrashing.
-                 */
-                thrashing_limit = (thrashing_limit * (100 - thrashing_limit_decay_pct)) / 100;
-            }
-        }
-    }
-
-no_kill:
-    /* Do not poll if kernel supports pidfd waiting */
-    if (is_waiting_for_kill()) {
-        /* Pause polling if we are waiting for process death notification */
-        poll_params->update = POLLING_PAUSE;
-        return;
-    }
-
-    /*
-     * Start polling after initial PSI event;
-     * extend polling while device is in direct reclaim or process is being killed;
-     * do not extend when kswapd reclaims because that might go on for a long time
-     * without causing memory pressure
-     */
-    if (events || killing || reclaim == DIRECT_RECLAIM) {
-        poll_params->update = POLLING_START;
-    }
-
-    /* Decide the polling interval */
-    if (swap_is_low || killing) {
-        /* Fast polling during and after a kill or when swap is low */
-        poll_params->polling_interval_ms = PSI_POLL_PERIOD_SHORT_MS;
-    } else {
-        /* By default use long intervals */
-        poll_params->polling_interval_ms = PSI_POLL_PERIOD_LONG_MS;
-    }
-}
-
-static void mp_event_common(int data, uint32_t events, struct polling_params *poll_params) {
-    int ret;
-    unsigned long long evcount;
-    int64_t mem_usage, memsw_usage;
-    int64_t mem_pressure;
-    enum vmpressure_level lvl;
-    union meminfo mi;
-    struct zoneinfo zi;
-    struct timespec curr_tm;
-    static unsigned long kill_skip_count = 0;
-    enum vmpressure_level level = (enum vmpressure_level)data;
-    long other_free = 0, other_file = 0;
-    int min_score_adj;
-    int minfree = 0;
-    static struct reread_data mem_usage_file_data = {
-        .filename = MEMCG_MEMORY_USAGE,
-        .fd = -1,
-    };
-    static struct reread_data memsw_usage_file_data = {
-        .filename = MEMCG_MEMORYSW_USAGE,
-        .fd = -1,
-    };
-
-    if (debug_process_killing) {
-        ALOGI("%s memory pressure event is triggered", level_name[level]);
-    }
-
-    if (!use_psi_monitors) {
-        /*
-         * Check all event counters from low to critical
-         * and upgrade to the highest priority one. By reading
-         * eventfd we also reset the event counters.
-         */
-        for (lvl = VMPRESS_LEVEL_LOW; lvl < VMPRESS_LEVEL_COUNT; lvl++) {
-            if (mpevfd[lvl] != -1 &&
-                TEMP_FAILURE_RETRY(read(mpevfd[lvl],
-                                   &evcount, sizeof(evcount))) > 0 &&
-                evcount > 0 && lvl > level) {
-                level = lvl;
-            }
-        }
-    }
-
-    /* Start polling after initial PSI event */
-    if (use_psi_monitors && events) {
-        /* Override polling params only if current event is more critical */
-        if (!poll_params->poll_handler || data > poll_params->poll_handler->data) {
-            poll_params->polling_interval_ms = PSI_POLL_PERIOD_SHORT_MS;
-            poll_params->update = POLLING_START;
-        }
-    }
-
-    if (clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm) != 0) {
-        ALOGE("Failed to get current time");
-        return;
-    }
-
-    if (kill_timeout_ms && get_time_diff_ms(&last_kill_tm, &curr_tm) < kill_timeout_ms) {
-        /*
-         * If we're within the no-kill timeout, see if there's pending reclaim work
-         * from the last killed process. If so, skip killing for now.
-         */
-        if (is_kill_pending()) {
-            kill_skip_count++;
-            return;
-        }
-        /*
-         * Process is dead, stop waiting. This has no effect if pidfds are supported and
-         * death notification already caused waiting to stop.
-         */
-        stop_wait_for_proc_kill(true);
-    } else {
-        /*
-         * Killing took longer than no-kill timeout. Stop waiting for the last process
-         * to die because we are ready to kill again.
-         */
-        stop_wait_for_proc_kill(false);
-    }
-
-    if (kill_skip_count > 0) {
-        ALOGI("%lu memory pressure events were skipped after a kill!",
-              kill_skip_count);
-        kill_skip_count = 0;
-    }
-
-    if (meminfo_parse(&mi) < 0 || zoneinfo_parse(&zi) < 0) {
-        ALOGE("Failed to get free memory!");
-        return;
-    }
-
-    if (use_minfree_levels) {
-        int i;
-
-        other_free = mi.field.nr_free_pages - zi.totalreserve_pages;
-        if (mi.field.nr_file_pages > (mi.field.shmem + mi.field.unevictable + mi.field.swap_cached)) {
-            other_file = (mi.field.nr_file_pages - mi.field.shmem -
-                          mi.field.unevictable - mi.field.swap_cached);
-        } else {
-            other_file = 0;
-        }
-
-        min_score_adj = OOM_SCORE_ADJ_MAX + 1;
-        for (i = 0; i < lowmem_targets_size; i++) {
-            minfree = lowmem_minfree[i];
-            if (other_free < minfree && other_file < minfree) {
-                min_score_adj = lowmem_adj[i];
-                break;
-            }
-        }
-
-        if (min_score_adj == OOM_SCORE_ADJ_MAX + 1) {
-            if (debug_process_killing) {
-                ALOGI("Ignore %s memory pressure event "
-                      "(free memory=%ldkB, cache=%ldkB, limit=%ldkB)",
-                      level_name[level], other_free * page_k, other_file * page_k,
-                      (long)lowmem_minfree[lowmem_targets_size - 1] * page_k);
-            }
-            return;
-        }
-
-        goto do_kill;
-    }
-
-    if (level == VMPRESS_LEVEL_LOW) {
-        record_low_pressure_levels(&mi);
-    }
-
-    if (level_oomadj[level] > OOM_SCORE_ADJ_MAX) {
-        /* Do not monitor this pressure level */
-        return;
-    }
-
-    if ((mem_usage = get_memory_usage(&mem_usage_file_data)) < 0) {
-        goto do_kill;
-    }
-    if ((memsw_usage = get_memory_usage(&memsw_usage_file_data)) < 0) {
-        goto do_kill;
-    }
-
-    // Calculate percent for swappinness.
-    mem_pressure = (mem_usage * 100) / memsw_usage;
-
-    if (enable_pressure_upgrade && level != VMPRESS_LEVEL_CRITICAL) {
-        // We are swapping too much.
-        if (mem_pressure < upgrade_pressure) {
-            level = upgrade_level(level);
-            if (debug_process_killing) {
-                ALOGI("Event upgraded to %s", level_name[level]);
-            }
-        }
-    }
-
-    // If we still have enough swap space available, check if we want to
-    // ignore/downgrade pressure events.
-    if (mi.field.free_swap >=
-        mi.field.total_swap * swap_free_low_percentage / 100) {
-        // If the pressure is larger than downgrade_pressure lmk will not
-        // kill any process, since enough memory is available.
-        if (mem_pressure > downgrade_pressure) {
-            if (debug_process_killing) {
-                ALOGI("Ignore %s memory pressure", level_name[level]);
-            }
-            return;
-        } else if (level == VMPRESS_LEVEL_CRITICAL && mem_pressure > upgrade_pressure) {
-            if (debug_process_killing) {
-                ALOGI("Downgrade critical memory pressure");
-            }
-            // Downgrade event, since enough memory available.
-            level = downgrade_level(level);
-        }
-    }
-
-do_kill:
-    if (low_ram_device) {
-        /* For Go devices kill only one task */
-        if (find_and_kill_process(level_oomadj[level], -1, NULL, &mi, &curr_tm) == 0) {
-            if (debug_process_killing) {
-                ALOGI("Nothing to kill");
-            }
-        }
-    } else {
-        int pages_freed;
-        static struct timespec last_report_tm;
-        static unsigned long report_skip_count = 0;
-
-        if (!use_minfree_levels) {
-            /* Free up enough memory to downgrate the memory pressure to low level */
-            if (mi.field.nr_free_pages >= low_pressure_mem.max_nr_free_pages) {
-                if (debug_process_killing) {
-                    ALOGI("Ignoring pressure since more memory is "
-                        "available (%" PRId64 ") than watermark (%" PRId64 ")",
-                        mi.field.nr_free_pages, low_pressure_mem.max_nr_free_pages);
-                }
-                return;
-            }
-            min_score_adj = level_oomadj[level];
-        }
-
-        pages_freed = find_and_kill_process(min_score_adj, -1, NULL, &mi, &curr_tm);
-
-        if (pages_freed == 0) {
-            /* Rate limit kill reports when nothing was reclaimed */
-            if (get_time_diff_ms(&last_report_tm, &curr_tm) < FAIL_REPORT_RLIMIT_MS) {
-                report_skip_count++;
-                return;
-            }
-        }
-
-        /* Log whenever we kill or when report rate limit allows */
-        if (use_minfree_levels) {
-            ALOGI("Reclaimed %ldkB, cache(%ldkB) and "
-                "free(%" PRId64 "kB)-reserved(%" PRId64 "kB) below min(%ldkB) for oom_adj %d",
-                pages_freed * page_k,
-                other_file * page_k, mi.field.nr_free_pages * page_k,
-                zi.totalreserve_pages * page_k,
-                minfree * page_k, min_score_adj);
-        } else {
-            ALOGI("Reclaimed %ldkB at oom_adj %d",
-                pages_freed * page_k, min_score_adj);
-        }
-
-        if (report_skip_count > 0) {
-            ALOGI("Suppressed %lu failed kill reports", report_skip_count);
-            report_skip_count = 0;
-        }
-
-        last_report_tm = curr_tm;
-    }
-    if (is_waiting_for_kill()) {
-        /* pause polling if we are waiting for process death notification */
-        poll_params->update = POLLING_PAUSE;
-    }
-}
-
-static bool init_mp_psi(enum vmpressure_level level, bool use_new_strategy) {
-    int fd;
-
-    /* Do not register a handler if threshold_ms is not set */
-    if (!psi_thresholds[level].threshold_ms) {
-        return true;
-    }
-
-    fd = init_psi_monitor(psi_thresholds[level].stall_type,
-        psi_thresholds[level].threshold_ms * US_PER_MS,
-        PSI_WINDOW_SIZE_MS * US_PER_MS);
-
-    if (fd < 0) {
-        return false;
-    }
-
-    vmpressure_hinfo[level].handler = use_new_strategy ? mp_event_psi : mp_event_common;
-    vmpressure_hinfo[level].data = level;
-    if (register_psi_monitor(epollfd, fd, &vmpressure_hinfo[level]) < 0) {
-        destroy_psi_monitor(fd);
-        return false;
-    }
-    maxevents++;
-    mpevfd[level] = fd;
-
-    return true;
-}
-
-static void destroy_mp_psi(enum vmpressure_level level) {
-    int fd = mpevfd[level];
-
-    if (unregister_psi_monitor(epollfd, fd) < 0) {
-        ALOGE("Failed to unregister psi monitor for %s memory pressure; errno=%d",
-            level_name[level], errno);
-    }
-    destroy_psi_monitor(fd);
-    mpevfd[level] = -1;
-}
-
-static bool init_psi_monitors() {
-    /*
-     * When PSI is used on low-ram devices or on high-end devices without memfree levels
-     * use new kill strategy based on zone watermarks, free swap and thrashing stats
-     */
-    bool use_new_strategy =
-        property_get_bool("ro.lmk.use_new_strategy", low_ram_device || !use_minfree_levels);
-
-    /* In default PSI mode override stall amounts using system properties */
-    if (use_new_strategy) {
-        /* Do not use low pressure level */
-        psi_thresholds[VMPRESS_LEVEL_LOW].threshold_ms = 0;
-        psi_thresholds[VMPRESS_LEVEL_MEDIUM].threshold_ms = psi_partial_stall_ms;
-        psi_thresholds[VMPRESS_LEVEL_CRITICAL].threshold_ms = psi_complete_stall_ms;
-    }
-
-    if (!init_mp_psi(VMPRESS_LEVEL_LOW, use_new_strategy)) {
-        return false;
-    }
-    if (!init_mp_psi(VMPRESS_LEVEL_MEDIUM, use_new_strategy)) {
-        destroy_mp_psi(VMPRESS_LEVEL_LOW);
-        return false;
-    }
-    if (!init_mp_psi(VMPRESS_LEVEL_CRITICAL, use_new_strategy)) {
-        destroy_mp_psi(VMPRESS_LEVEL_MEDIUM);
-        destroy_mp_psi(VMPRESS_LEVEL_LOW);
-        return false;
-    }
-    return true;
-}
-
-static bool init_mp_common(enum vmpressure_level level) {
-    int mpfd;
-    int evfd;
-    int evctlfd;
-    char buf[256];
-    struct epoll_event epev;
-    int ret;
-    int level_idx = (int)level;
-    const char *levelstr = level_name[level_idx];
-
-    /* gid containing AID_SYSTEM required */
-    mpfd = open(MEMCG_SYSFS_PATH "memory.pressure_level", O_RDONLY | O_CLOEXEC);
-    if (mpfd < 0) {
-        ALOGI("No kernel memory.pressure_level support (errno=%d)", errno);
-        goto err_open_mpfd;
-    }
-
-    evctlfd = open(MEMCG_SYSFS_PATH "cgroup.event_control", O_WRONLY | O_CLOEXEC);
-    if (evctlfd < 0) {
-        ALOGI("No kernel memory cgroup event control (errno=%d)", errno);
-        goto err_open_evctlfd;
-    }
-
-    evfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
-    if (evfd < 0) {
-        ALOGE("eventfd failed for level %s; errno=%d", levelstr, errno);
-        goto err_eventfd;
-    }
-
-    ret = snprintf(buf, sizeof(buf), "%d %d %s", evfd, mpfd, levelstr);
-    if (ret >= (ssize_t)sizeof(buf)) {
-        ALOGE("cgroup.event_control line overflow for level %s", levelstr);
-        goto err;
-    }
-
-    ret = TEMP_FAILURE_RETRY(write(evctlfd, buf, strlen(buf) + 1));
-    if (ret == -1) {
-        ALOGE("cgroup.event_control write failed for level %s; errno=%d",
-              levelstr, errno);
-        goto err;
-    }
-
-    epev.events = EPOLLIN;
-    /* use data to store event level */
-    vmpressure_hinfo[level_idx].data = level_idx;
-    vmpressure_hinfo[level_idx].handler = mp_event_common;
-    epev.data.ptr = (void *)&vmpressure_hinfo[level_idx];
-    ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, evfd, &epev);
-    if (ret == -1) {
-        ALOGE("epoll_ctl for level %s failed; errno=%d", levelstr, errno);
-        goto err;
-    }
-    maxevents++;
-    mpevfd[level] = evfd;
-    close(evctlfd);
-    return true;
-
-err:
-    close(evfd);
-err_eventfd:
-    close(evctlfd);
-err_open_evctlfd:
-    close(mpfd);
-err_open_mpfd:
-    return false;
-}
-
-static void kernel_event_handler(int data __unused, uint32_t events __unused,
-                                 struct polling_params *poll_params __unused) {
-    kpoll_info.handler(kpoll_info.poll_fd);
-}
-
-static int init(void) {
-    static struct event_handler_info kernel_poll_hinfo = { 0, kernel_event_handler };
-    struct reread_data file_data = {
-        .filename = ZONEINFO_PATH,
-        .fd = -1,
-    };
-    struct epoll_event epev;
-    int pidfd;
-    int i;
-    int ret;
-
-    page_k = sysconf(_SC_PAGESIZE);
-    if (page_k == -1)
-        page_k = PAGE_SIZE;
-    page_k /= 1024;
-
-    epollfd = epoll_create(MAX_EPOLL_EVENTS);
-    if (epollfd == -1) {
-        ALOGE("epoll_create failed (errno=%d)", errno);
-        return -1;
-    }
-
-    // mark data connections as not connected
-    for (int i = 0; i < MAX_DATA_CONN; i++) {
-        data_sock[i].sock = -1;
-    }
-
-    ctrl_sock.sock = android_get_control_socket("lmkd");
-    if (ctrl_sock.sock < 0) {
-        ALOGE("get lmkd control socket failed");
-        return -1;
-    }
-
-    ret = listen(ctrl_sock.sock, MAX_DATA_CONN);
-    if (ret < 0) {
-        ALOGE("lmkd control socket listen failed (errno=%d)", errno);
-        return -1;
-    }
-
-    epev.events = EPOLLIN;
-    ctrl_sock.handler_info.handler = ctrl_connect_handler;
-    epev.data.ptr = (void *)&(ctrl_sock.handler_info);
-    if (epoll_ctl(epollfd, EPOLL_CTL_ADD, ctrl_sock.sock, &epev) == -1) {
-        ALOGE("epoll_ctl for lmkd control socket failed (errno=%d)", errno);
-        return -1;
-    }
-    maxevents++;
-
-    has_inkernel_module = !access(INKERNEL_MINFREE_PATH, W_OK);
-    use_inkernel_interface = has_inkernel_module;
-
-    if (use_inkernel_interface) {
-        ALOGI("Using in-kernel low memory killer interface");
-        if (init_poll_kernel(&kpoll_info)) {
-            epev.events = EPOLLIN;
-            epev.data.ptr = (void*)&kernel_poll_hinfo;
-            if (epoll_ctl(epollfd, EPOLL_CTL_ADD, kpoll_info.poll_fd, &epev) != 0) {
-                ALOGE("epoll_ctl for lmk events failed (errno=%d)", errno);
-                close(kpoll_info.poll_fd);
-                kpoll_info.poll_fd = -1;
-            } else {
-                maxevents++;
-            }
-        }
-    } else {
-        /* Try to use psi monitor first if kernel has it */
-        use_psi_monitors = property_get_bool("ro.lmk.use_psi", true) &&
-            init_psi_monitors();
-        /* Fall back to vmpressure */
-        if (!use_psi_monitors &&
-            (!init_mp_common(VMPRESS_LEVEL_LOW) ||
-            !init_mp_common(VMPRESS_LEVEL_MEDIUM) ||
-            !init_mp_common(VMPRESS_LEVEL_CRITICAL))) {
-            ALOGE("Kernel does not support memory pressure events or in-kernel low memory killer");
-            return -1;
-        }
-        if (use_psi_monitors) {
-            ALOGI("Using psi monitors for memory pressure detection");
-        } else {
-            ALOGI("Using vmpressure for memory pressure detection");
-        }
-    }
-
-    for (i = 0; i <= ADJTOSLOT(OOM_SCORE_ADJ_MAX); i++) {
-        procadjslot_list[i].next = &procadjslot_list[i];
-        procadjslot_list[i].prev = &procadjslot_list[i];
-    }
-
-    memset(killcnt_idx, KILLCNT_INVALID_IDX, sizeof(killcnt_idx));
-
-    /*
-     * Read zoneinfo as the biggest file we read to create and size the initial
-     * read buffer and avoid memory re-allocations during memory pressure
-     */
-    if (reread_file(&file_data) == NULL) {
-        ALOGE("Failed to read %s: %s", file_data.filename, strerror(errno));
-    }
-
-    /* check if kernel supports pidfd_open syscall */
-    pidfd = TEMP_FAILURE_RETRY(sys_pidfd_open(getpid(), 0));
-    if (pidfd < 0) {
-        pidfd_supported = (errno != ENOSYS);
-    } else {
-        pidfd_supported = true;
-        close(pidfd);
-    }
-    ALOGI("Process polling is %s", pidfd_supported ? "supported" : "not supported" );
-
-    return 0;
-}
-
-static void call_handler(struct event_handler_info* handler_info,
-                         struct polling_params *poll_params, uint32_t events) {
-    struct timespec curr_tm;
-
-    handler_info->handler(handler_info->data, events, poll_params);
-    clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm);
-    poll_params->last_poll_tm = curr_tm;
-
-    switch (poll_params->update) {
-    case POLLING_START:
-        /*
-         * Poll for the duration of PSI_WINDOW_SIZE_MS after the
-         * initial PSI event because psi events are rate-limited
-         * at one per sec.
-         */
-        poll_params->poll_start_tm = curr_tm;
-        poll_params->poll_handler = handler_info;
-        break;
-    case POLLING_STOP:
-        poll_params->poll_handler = NULL;
-        break;
-    case POLLING_PAUSE:
-        poll_params->paused_handler = handler_info;
-        poll_params->poll_handler = NULL;
-        break;
-    case POLLING_RESUME:
-        poll_params->poll_start_tm = curr_tm;
-        poll_params->poll_handler = poll_params->paused_handler;
-        break;
-    case POLLING_DO_NOT_CHANGE:
-        if (get_time_diff_ms(&poll_params->poll_start_tm, &curr_tm) > PSI_WINDOW_SIZE_MS) {
-            /* Polled for the duration of PSI window, time to stop */
-            poll_params->poll_handler = NULL;
-        }
-        /* WARNING: skipping the rest of the function */
-        return;
-    }
-    poll_params->update = POLLING_DO_NOT_CHANGE;
-}
-
-static void mainloop(void) {
-    struct event_handler_info* handler_info;
-    struct polling_params poll_params;
-    struct timespec curr_tm;
-    struct epoll_event *evt;
-    long delay = -1;
-
-    poll_params.poll_handler = NULL;
-    poll_params.update = POLLING_DO_NOT_CHANGE;
-
-    while (1) {
-        struct epoll_event events[maxevents];
-        int nevents;
-        int i;
-
-        if (poll_params.poll_handler) {
-            bool poll_now;
-
-            clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm);
-            if (poll_params.poll_handler == poll_params.paused_handler) {
-                /*
-                 * Just transitioned into POLLING_RESUME. Reset paused_handler
-                 * and poll immediately
-                 */
-                poll_params.paused_handler = NULL;
-                poll_now = true;
-                nevents = 0;
-            } else {
-                /* Calculate next timeout */
-                delay = get_time_diff_ms(&poll_params.last_poll_tm, &curr_tm);
-                delay = (delay < poll_params.polling_interval_ms) ?
-                    poll_params.polling_interval_ms - delay : poll_params.polling_interval_ms;
-
-                /* Wait for events until the next polling timeout */
-                nevents = epoll_wait(epollfd, events, maxevents, delay);
-
-                /* Update current time after wait */
-                clock_gettime(CLOCK_MONOTONIC_COARSE, &curr_tm);
-                poll_now = (get_time_diff_ms(&poll_params.last_poll_tm, &curr_tm) >=
-                    poll_params.polling_interval_ms);
-            }
-            if (poll_now) {
-                call_handler(poll_params.poll_handler, &poll_params, 0);
-            }
-        } else {
-            /* Wait for events with no timeout */
-            nevents = epoll_wait(epollfd, events, maxevents, -1);
-        }
-
-        if (nevents == -1) {
-            if (errno == EINTR)
-                continue;
-            ALOGE("epoll_wait failed (errno=%d)", errno);
-            continue;
-        }
-
-        /*
-         * First pass to see if any data socket connections were dropped.
-         * Dropped connection should be handled before any other events
-         * to deallocate data connection and correctly handle cases when
-         * connection gets dropped and reestablished in the same epoll cycle.
-         * In such cases it's essential to handle connection closures first.
-         */
-        for (i = 0, evt = &events[0]; i < nevents; ++i, evt++) {
-            if ((evt->events & EPOLLHUP) && evt->data.ptr) {
-                ALOGI("lmkd data connection dropped");
-                handler_info = (struct event_handler_info*)evt->data.ptr;
-                ctrl_data_close(handler_info->data);
-            }
-        }
-
-        /* Second pass to handle all other events */
-        for (i = 0, evt = &events[0]; i < nevents; ++i, evt++) {
-            if (evt->events & EPOLLERR) {
-                ALOGD("EPOLLERR on event #%d", i);
-            }
-            if (evt->events & EPOLLHUP) {
-                /* This case was handled in the first pass */
-                continue;
-            }
-            if (evt->data.ptr) {
-                handler_info = (struct event_handler_info*)evt->data.ptr;
-                call_handler(handler_info, &poll_params, evt->events);
-            }
-        }
-    }
-}
-
-int main(int argc __unused, char **argv __unused) {
-    struct sched_param param = {
-            .sched_priority = 1,
-    };
-
-    /* By default disable low level vmpressure events */
-    level_oomadj[VMPRESS_LEVEL_LOW] =
-        property_get_int32("ro.lmk.low", OOM_SCORE_ADJ_MAX + 1);
-    level_oomadj[VMPRESS_LEVEL_MEDIUM] =
-        property_get_int32("ro.lmk.medium", 800);
-    level_oomadj[VMPRESS_LEVEL_CRITICAL] =
-        property_get_int32("ro.lmk.critical", 0);
-    debug_process_killing = property_get_bool("ro.lmk.debug", false);
-
-    /* By default disable upgrade/downgrade logic */
-    enable_pressure_upgrade =
-        property_get_bool("ro.lmk.critical_upgrade", false);
-    upgrade_pressure =
-        (int64_t)property_get_int32("ro.lmk.upgrade_pressure", 100);
-    downgrade_pressure =
-        (int64_t)property_get_int32("ro.lmk.downgrade_pressure", 100);
-    kill_heaviest_task =
-        property_get_bool("ro.lmk.kill_heaviest_task", false);
-    low_ram_device = property_get_bool("ro.config.low_ram", false);
-    kill_timeout_ms =
-        (unsigned long)property_get_int32("ro.lmk.kill_timeout_ms", 0);
-    use_minfree_levels =
-        property_get_bool("ro.lmk.use_minfree_levels", false);
-    per_app_memcg =
-        property_get_bool("ro.config.per_app_memcg", low_ram_device);
-    swap_free_low_percentage = clamp(0, 100, property_get_int32("ro.lmk.swap_free_low_percentage",
-        low_ram_device ? DEF_LOW_SWAP_LOWRAM : DEF_LOW_SWAP));
-    psi_partial_stall_ms = property_get_int32("ro.lmk.psi_partial_stall_ms",
-        low_ram_device ? DEF_PARTIAL_STALL_LOWRAM : DEF_PARTIAL_STALL);
-    psi_complete_stall_ms = property_get_int32("ro.lmk.psi_complete_stall_ms",
-        DEF_COMPLETE_STALL);
-    thrashing_limit_pct = max(0, property_get_int32("ro.lmk.thrashing_limit",
-        low_ram_device ? DEF_THRASHING_LOWRAM : DEF_THRASHING));
-    thrashing_limit_decay_pct = clamp(0, 100, property_get_int32("ro.lmk.thrashing_limit_decay",
-        low_ram_device ? DEF_THRASHING_DECAY_LOWRAM : DEF_THRASHING_DECAY));
-
-    ctx = create_android_logger(KILLINFO_LOG_TAG);
-
-    statslog_init();
-
-    if (!init()) {
-        if (!use_inkernel_interface) {
-            /*
-             * MCL_ONFAULT pins pages as they fault instead of loading
-             * everything immediately all at once. (Which would be bad,
-             * because as of this writing, we have a lot of mapped pages we
-             * never use.) Old kernels will see MCL_ONFAULT and fail with
-             * EINVAL; we ignore this failure.
-             *
-             * N.B. read the man page for mlockall. MCL_CURRENT | MCL_ONFAULT
-             * pins ⊆ MCL_CURRENT, converging to just MCL_CURRENT as we fault
-             * in pages.
-             */
-            /* CAP_IPC_LOCK required */
-            if (mlockall(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT) && (errno != EINVAL)) {
-                ALOGW("mlockall failed %s", strerror(errno));
-            }
-
-            /* CAP_NICE required */
-            if (sched_setscheduler(0, SCHED_FIFO, &param)) {
-                ALOGW("set SCHED_FIFO failed %s", strerror(errno));
-            }
-        }
-
-        mainloop();
-    }
-
-    statslog_destroy();
-
-    android_log_destroy(&ctx);
-
-    ALOGI("exiting");
-    return 0;
-}
diff --git a/lmkd/lmkd.rc b/lmkd/lmkd.rc
deleted file mode 100644
index 76b6055..0000000
--- a/lmkd/lmkd.rc
+++ /dev/null
@@ -1,8 +0,0 @@
-service lmkd /system/bin/lmkd
-    class core
-    user lmkd
-    group lmkd system readproc
-    capabilities DAC_OVERRIDE KILL IPC_LOCK SYS_NICE SYS_RESOURCE
-    critical
-    socket lmkd seqpacket 0660 system system
-    writepid /dev/cpuset/system-background/tasks
diff --git a/lmkd/statslog.c b/lmkd/statslog.c
deleted file mode 100644
index c0fd6df..0000000
--- a/lmkd/statslog.c
+++ /dev/null
@@ -1,432 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#include <assert.h>
-#include <errno.h>
-#include <log/log_id.h>
-#include <stats_event_list.h>
-#include <statslog.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#ifdef LMKD_LOG_STATS
-
-#define LINE_MAX 128
-#define STRINGIFY(x) STRINGIFY_INTERNAL(x)
-#define STRINGIFY_INTERNAL(x) #x
-
-static bool enable_stats_log;
-static android_log_context log_ctx;
-
-struct proc {
-    int pid;
-    char taskname[LINE_MAX];
-    struct proc* pidhash_next;
-};
-
-#define PIDHASH_SZ 1024
-static struct proc** pidhash = NULL;
-#define pid_hashfn(x) ((((x) >> 8) ^ (x)) & (PIDHASH_SZ - 1))
-
-static int64_t getElapsedRealTimeNs() {
-    struct timespec t;
-    t.tv_sec = t.tv_nsec = 0;
-    clock_gettime(CLOCK_BOOTTIME, &t);
-    return (int64_t)t.tv_sec * 1000000000LL + t.tv_nsec;
-}
-
-void statslog_init() {
-    enable_stats_log = property_get_bool("ro.lmk.log_stats", false);
-
-    if (enable_stats_log) {
-        log_ctx = create_android_logger(kStatsEventTag);
-    }
-}
-
-void statslog_destroy() {
-    if (log_ctx) {
-        android_log_destroy(&log_ctx);
-    }
-}
-
-/**
- * Logs the change in LMKD state which is used as start/stop boundaries for logging
- * LMK_KILL_OCCURRED event.
- * Code: LMK_STATE_CHANGED = 54
- */
-int
-stats_write_lmk_state_changed(int32_t code, int32_t state) {
-    int ret = -EINVAL;
-
-    if (!enable_stats_log) {
-        return ret;
-    }
-
-    assert(log_ctx != NULL);
-    if (!log_ctx) {
-        return ret;
-    }
-
-    reset_log_context(log_ctx);
-
-    if ((ret = android_log_write_int64(log_ctx, getElapsedRealTimeNs())) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, code)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, state)) < 0) {
-        return ret;
-    }
-
-    return write_to_logger(log_ctx, LOG_ID_STATS);
-}
-
-static struct proc* pid_lookup(int pid) {
-    struct proc* procp;
-
-    if (!pidhash) return NULL;
-
-    for (procp = pidhash[pid_hashfn(pid)]; procp && procp->pid != pid; procp = procp->pidhash_next)
-        ;
-
-    return procp;
-}
-
-/**
- * Logs the event when LMKD kills a process to reduce memory pressure.
- * Code: LMK_KILL_OCCURRED = 51
- */
-int
-stats_write_lmk_kill_occurred(int32_t code, int32_t uid, char const* process_name,
-                              int32_t oom_score, int32_t min_oom_score, int tasksize,
-                              struct memory_stat *mem_st) {
-    int ret = -EINVAL;
-    if (!enable_stats_log) {
-        return ret;
-    }
-    if (!log_ctx) {
-        return ret;
-    }
-    reset_log_context(log_ctx);
-
-    if ((ret = android_log_write_int64(log_ctx, getElapsedRealTimeNs())) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, code)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, uid)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_string8(log_ctx, (process_name == NULL) ? "" : process_name)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, oom_score)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->pgfault : -1)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->pgmajfault : -1)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->rss_in_bytes
-                                                       : tasksize * BYTES_IN_KILOBYTE)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->cache_in_bytes : -1)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->swap_in_bytes : -1)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int64(log_ctx, mem_st ? mem_st->process_start_time_ns
-                                                       : -1)) < 0) {
-        return ret;
-    }
-
-    if ((ret = android_log_write_int32(log_ctx, min_oom_score)) < 0) {
-        return ret;
-    }
-
-    return write_to_logger(log_ctx, LOG_ID_STATS);
-}
-
-static int stats_write_lmk_kill_occurred_pid(int32_t code, int32_t uid, int pid,
-                                      int32_t oom_score, int32_t min_oom_score, int tasksize,
-                                      struct memory_stat *mem_st) {
-    struct proc* proc = pid_lookup(pid);
-    if (!proc) return -EINVAL;
-
-    return stats_write_lmk_kill_occurred(code, uid, proc->taskname, oom_score, min_oom_score,
-                                         tasksize, mem_st);
-}
-
-static void memory_stat_parse_line(char* line, struct memory_stat* mem_st) {
-    char key[LINE_MAX + 1];
-    int64_t value;
-
-    sscanf(line, "%" STRINGIFY(LINE_MAX) "s  %" SCNd64 "", key, &value);
-
-    if (strcmp(key, "total_") < 0) {
-        return;
-    }
-
-    if (!strcmp(key, "total_pgfault"))
-        mem_st->pgfault = value;
-    else if (!strcmp(key, "total_pgmajfault"))
-        mem_st->pgmajfault = value;
-    else if (!strcmp(key, "total_rss"))
-        mem_st->rss_in_bytes = value;
-    else if (!strcmp(key, "total_cache"))
-        mem_st->cache_in_bytes = value;
-    else if (!strcmp(key, "total_swap"))
-        mem_st->swap_in_bytes = value;
-}
-
-static int memory_stat_from_cgroup(struct memory_stat* mem_st, int pid, uid_t uid) {
-    FILE *fp;
-    char buf[PATH_MAX];
-
-    snprintf(buf, sizeof(buf), MEMCG_PROCESS_MEMORY_STAT_PATH, uid, pid);
-
-    fp = fopen(buf, "r");
-
-    if (fp == NULL) {
-        return -1;
-    }
-
-    while (fgets(buf, PAGE_SIZE, fp) != NULL) {
-        memory_stat_parse_line(buf, mem_st);
-    }
-    fclose(fp);
-
-    return 0;
-}
-
-static int memory_stat_from_procfs(struct memory_stat* mem_st, int pid) {
-    char path[PATH_MAX];
-    char buffer[PROC_STAT_BUFFER_SIZE];
-    int fd, ret;
-
-    snprintf(path, sizeof(path), PROC_STAT_FILE_PATH, pid);
-    if ((fd = open(path, O_RDONLY | O_CLOEXEC)) < 0) {
-        return -1;
-    }
-
-    ret = read(fd, buffer, sizeof(buffer));
-    if (ret < 0) {
-        close(fd);
-        return -1;
-    }
-    close(fd);
-
-    // field 10 is pgfault
-    // field 12 is pgmajfault
-    // field 22 is starttime
-    // field 24 is rss_in_pages
-    int64_t pgfault = 0, pgmajfault = 0, starttime = 0, rss_in_pages = 0;
-    if (sscanf(buffer,
-               "%*u %*s %*s %*d %*d %*d %*d %*d %*d %" SCNd64 " %*d "
-               "%" SCNd64 " %*d %*u %*u %*d %*d %*d %*d %*d %*d "
-               "%" SCNd64 " %*d %" SCNd64 "",
-               &pgfault, &pgmajfault, &starttime, &rss_in_pages) != 4) {
-        return -1;
-    }
-    mem_st->pgfault = pgfault;
-    mem_st->pgmajfault = pgmajfault;
-    mem_st->rss_in_bytes = (rss_in_pages * PAGE_SIZE);
-    mem_st->process_start_time_ns = starttime * (NS_PER_SEC / sysconf(_SC_CLK_TCK));
-
-    return 0;
-}
-
-struct memory_stat *stats_read_memory_stat(bool per_app_memcg, int pid, uid_t uid) {
-    static struct memory_stat mem_st = {};
-
-    if (!enable_stats_log) {
-        return NULL;
-    }
-
-    if (per_app_memcg) {
-        if (memory_stat_from_cgroup(&mem_st, pid, uid) == 0) {
-            return &mem_st;
-        }
-    } else {
-        if (memory_stat_from_procfs(&mem_st, pid) == 0) {
-            return &mem_st;
-        }
-    }
-
-    return NULL;
-}
-
-static void poll_kernel(int poll_fd) {
-    if (poll_fd == -1) {
-        // not waiting
-        return;
-    }
-
-    while (1) {
-        char rd_buf[256];
-        int bytes_read =
-                TEMP_FAILURE_RETRY(pread(poll_fd, (void*)rd_buf, sizeof(rd_buf), 0));
-        if (bytes_read <= 0) break;
-        rd_buf[bytes_read] = '\0';
-
-        int64_t pid;
-        int64_t uid;
-        int64_t group_leader_pid;
-        int64_t rss_in_pages;
-        struct memory_stat mem_st = {};
-        int16_t oom_score_adj;
-        int16_t min_score_adj;
-        int64_t starttime;
-        char* taskname = 0;
-
-        int fields_read = sscanf(rd_buf,
-                                 "%" SCNd64 " %" SCNd64 " %" SCNd64 " %" SCNd64 " %" SCNd64
-                                 " %" SCNd64 " %" SCNd16 " %" SCNd16 " %" SCNd64 "\n%m[^\n]",
-                                 &pid, &uid, &group_leader_pid, &mem_st.pgfault,
-                                 &mem_st.pgmajfault, &rss_in_pages, &oom_score_adj,
-                                 &min_score_adj, &starttime, &taskname);
-
-        /* only the death of the group leader process is logged */
-        if (fields_read == 10 && group_leader_pid == pid) {
-            mem_st.process_start_time_ns = starttime * (NS_PER_SEC / sysconf(_SC_CLK_TCK));
-            mem_st.rss_in_bytes = rss_in_pages * PAGE_SIZE;
-            stats_write_lmk_kill_occurred_pid(LMK_KILL_OCCURRED, uid, pid, oom_score_adj,
-                                              min_score_adj, 0, &mem_st);
-        }
-
-        free(taskname);
-    }
-}
-
-bool init_poll_kernel(struct kernel_poll_info *poll_info) {
-    if (!enable_stats_log) {
-        return false;
-    }
-
-    poll_info->poll_fd =
-            TEMP_FAILURE_RETRY(open("/proc/lowmemorykiller", O_RDONLY | O_NONBLOCK | O_CLOEXEC));
-
-    if (poll_info->poll_fd < 0) {
-        ALOGE("kernel lmk event file could not be opened; errno=%d", errno);
-        return false;
-    }
-    poll_info->handler = poll_kernel;
-
-    return true;
-}
-
-static void proc_insert(struct proc* procp) {
-    if (!pidhash) {
-        pidhash = calloc(PIDHASH_SZ, sizeof(struct proc));
-    }
-
-    int hval = pid_hashfn(procp->pid);
-    procp->pidhash_next = pidhash[hval];
-    pidhash[hval] = procp;
-}
-
-void stats_remove_taskname(int pid, int poll_fd) {
-    if (!enable_stats_log || !pidhash) {
-        return;
-    }
-
-    /*
-     * Perform an extra check before the pid is removed, after which it
-     * will be impossible for poll_kernel to get the taskname. poll_kernel()
-     * is potentially a long-running blocking function; however this method
-     * handles AMS requests but does not block AMS.
-     */
-    poll_kernel(poll_fd);
-
-    int hval = pid_hashfn(pid);
-    struct proc* procp;
-    struct proc* prevp;
-
-    for (procp = pidhash[hval], prevp = NULL; procp && procp->pid != pid;
-         procp = procp->pidhash_next)
-        prevp = procp;
-
-    if (!procp)
-        return;
-
-    if (!prevp)
-        pidhash[hval] = procp->pidhash_next;
-    else
-        prevp->pidhash_next = procp->pidhash_next;
-
-    free(procp);
-}
-
-void stats_store_taskname(int pid, const char* taskname, int poll_fd) {
-    if (!enable_stats_log) {
-        return;
-    }
-
-    struct proc* procp = pid_lookup(pid);
-    if (procp != NULL) {
-        if (strcmp(procp->taskname, taskname) == 0) {
-            return;
-        }
-        stats_remove_taskname(pid, poll_fd);
-    }
-    procp = malloc(sizeof(struct proc));
-    procp->pid = pid;
-    strncpy(procp->taskname, taskname, LINE_MAX - 1);
-    procp->taskname[LINE_MAX - 1] = '\0';
-    proc_insert(procp);
-}
-
-void stats_purge_tasknames() {
-    if (!enable_stats_log || !pidhash) {
-        return;
-    }
-
-    struct proc* procp;
-    struct proc* next;
-    int i;
-    for (i = 0; i < PIDHASH_SZ; i++) {
-        procp = pidhash[i];
-        while (procp) {
-            next = procp->pidhash_next;
-            free(procp);
-            procp = next;
-        }
-    }
-    memset(pidhash, 0, PIDHASH_SZ * sizeof(struct proc));
-}
-
-#endif /* LMKD_LOG_STATS */
diff --git a/lmkd/statslog.h b/lmkd/statslog.h
deleted file mode 100644
index a09c7dd..0000000
--- a/lmkd/statslog.h
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
- *  Copyright 2018 Google, Inc
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-
-#ifndef _STATSLOG_H_
-#define _STATSLOG_H_
-
-#include <assert.h>
-#include <inttypes.h>
-#include <stats_event_list.h>
-#include <stdbool.h>
-#include <sys/cdefs.h>
-
-#include <cutils/properties.h>
-
-__BEGIN_DECLS
-
-struct memory_stat {
-    int64_t pgfault;
-    int64_t pgmajfault;
-    int64_t rss_in_bytes;
-    int64_t cache_in_bytes;
-    int64_t swap_in_bytes;
-    int64_t process_start_time_ns;
-};
-
-struct kernel_poll_info {
-    int poll_fd;
-    void (*handler)(int poll_fd);
-};
-
-/*
- * These are defined in
- * http://cs/android/frameworks/base/cmds/statsd/src/atoms.proto
- */
-#define LMK_KILL_OCCURRED 51
-#define LMK_STATE_CHANGED 54
-#define LMK_STATE_CHANGE_START 1
-#define LMK_STATE_CHANGE_STOP 2
-
-#ifdef LMKD_LOG_STATS
-
-/*
- * The single event tag id for all stats logs.
- * Keep this in sync with system/core/logcat/event.logtags
- */
-const static int kStatsEventTag = 1937006964;
-
-void statslog_init();
-
-void statslog_destroy();
-
-#define MEMCG_PROCESS_MEMORY_STAT_PATH "/dev/memcg/apps/uid_%u/pid_%u/memory.stat"
-#define PROC_STAT_FILE_PATH "/proc/%d/stat"
-#define PROC_STAT_BUFFER_SIZE 1024
-#define BYTES_IN_KILOBYTE 1024
-
-/**
- * Logs the change in LMKD state which is used as start/stop boundaries for logging
- * LMK_KILL_OCCURRED event.
- * Code: LMK_STATE_CHANGED = 54
- */
-int
-stats_write_lmk_state_changed(int32_t code, int32_t state);
-
-/**
- * Logs the event when LMKD kills a process to reduce memory pressure.
- * Code: LMK_KILL_OCCURRED = 51
- */
-int
-stats_write_lmk_kill_occurred(int32_t code, int32_t uid,
-                              char const* process_name, int32_t oom_score, int32_t min_oom_score,
-                              int tasksize, struct memory_stat *mem_st);
-
-struct memory_stat *stats_read_memory_stat(bool per_app_memcg, int pid, uid_t uid);
-
-/**
- * Registers a process taskname by pid, while it is still alive.
- */
-void stats_store_taskname(int pid, const char* taskname, int poll_fd);
-
-/**
- * Unregister all process tasknames.
- */
-void stats_purge_tasknames();
-
-/**
- * Unregister a process taskname, e.g. after it has been killed.
- */
-void stats_remove_taskname(int pid, int poll_fd);
-
-bool init_poll_kernel(struct kernel_poll_info *poll_info);
-
-#else /* LMKD_LOG_STATS */
-
-static inline void statslog_init() {}
-static inline void statslog_destroy() {}
-
-static inline int
-stats_write_lmk_state_changed(int32_t code __unused, int32_t state __unused) { return -EINVAL; }
-
-static inline int
-stats_write_lmk_kill_occurred(int32_t code __unused, int32_t uid __unused,
-                              char const* process_name __unused, int32_t oom_score __unused,
-                              int32_t min_oom_score __unused, int tasksize __unused,
-                              struct memory_stat *mem_st __unused) { return -EINVAL; }
-
-static inline struct memory_stat *stats_read_memory_stat(bool per_app_memcg __unused,
-                                    int pid __unused, uid_t uid __unused) { return NULL; }
-
-static inline void stats_store_taskname(int pid __unused, const char* taskname __unused,
-                                        int poll_fd __unused) {}
-
-static inline void stats_purge_tasknames() {}
-
-static inline void stats_remove_taskname(int pid __unused, int poll_fd __unused) {}
-
-static inline bool init_poll_kernel(struct kernel_poll_info *poll_info __unused) { return false; }
-
-#endif /* LMKD_LOG_STATS */
-
-__END_DECLS
-
-#endif /* _STATSLOG_H_ */
diff --git a/lmkd/tests/Android.bp b/lmkd/tests/Android.bp
deleted file mode 100644
index 4e845fd..0000000
--- a/lmkd/tests/Android.bp
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright (C) 2018 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-cc_test {
-    name: "lmkd_unit_test",
-
-    shared_libs: [
-        "libbase",
-        "liblog",
-        "libcutils",
-    ],
-
-    static_libs: [
-        "liblmkd_utils",
-    ],
-
-    target: {
-        android: {
-            srcs: ["lmkd_test.cpp"],
-        },
-    },
-
-    cflags: [
-        "-Wall",
-        "-Wextra",
-        "-Werror",
-    ],
-
-    compile_multilib: "first",
-}
diff --git a/lmkd/tests/lmkd_test.cpp b/lmkd/tests/lmkd_test.cpp
deleted file mode 100644
index f54b25c..0000000
--- a/lmkd/tests/lmkd_test.cpp
+++ /dev/null
@@ -1,374 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <sstream>
-#include <stdio.h>
-#include <string.h>
-#include <string>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/properties.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <gtest/gtest.h>
-#include <lmkd.h>
-#include <liblmkd_utils.h>
-#include <log/log_properties.h>
-#include <private/android_filesystem_config.h>
-
-using namespace android::base;
-
-#define INKERNEL_MINFREE_PATH "/sys/module/lowmemorykiller/parameters/minfree"
-#define LMKDTEST_RESPAWN_FLAG "LMKDTEST_RESPAWN"
-
-#define LMKD_LOGCAT_MARKER "lowmemorykiller"
-#define LMKD_KILL_MARKER_TEMPLATE LMKD_LOGCAT_MARKER ": Kill '%s'"
-#define OOM_MARKER "Out of memory"
-#define OOM_KILL_MARKER "Killed process"
-#define MIN_LOG_SIZE 100
-
-#define ONE_MB (1 << 20)
-
-/* Test constant parameters */
-#define OOM_ADJ_MAX 1000
-#define OOM_ADJ_MIN 0
-#define OOM_ADJ_STEP 100
-#define STEP_COUNT ((OOM_ADJ_MAX - OOM_ADJ_MIN) / OOM_ADJ_STEP + 1)
-
-#define ALLOC_STEP (ONE_MB)
-#define ALLOC_DELAY 1000
-
-/* Utility functions */
-std::string readCommand(const std::string& command) {
-    FILE* fp = popen(command.c_str(), "r");
-    std::string content;
-    ReadFdToString(fileno(fp), &content);
-    pclose(fp);
-    return content;
-}
-
-std::string readLogcat(const std::string& marker) {
-    std::string content = readCommand("logcat -d -b all");
-    size_t pos = content.find(marker);
-    if (pos == std::string::npos) return "";
-    content.erase(0, pos);
-    return content;
-}
-
-bool writeFile(const std::string& file, const std::string& string) {
-    if (getuid() == static_cast<unsigned>(AID_ROOT)) {
-        return WriteStringToFile(string, file);
-    }
-    return string == readCommand(
-        "echo -n '" + string + "' | su root tee " + file + " 2>&1");
-}
-
-bool writeKmsg(const std::string& marker) {
-    return writeFile("/dev/kmsg", marker);
-}
-
-std::string getTextAround(const std::string& text, size_t pos,
-                          size_t lines_before, size_t lines_after) {
-    size_t start_pos = pos;
-
-    // find start position
-    // move up lines_before number of lines
-    while (lines_before > 0 &&
-           (start_pos = text.rfind('\n', start_pos)) != std::string::npos) {
-        lines_before--;
-    }
-    // move to the beginning of the line
-    start_pos = text.rfind('\n', start_pos);
-    start_pos = (start_pos == std::string::npos) ? 0 : start_pos + 1;
-
-    // find end position
-    // move down lines_after number of lines
-    while (lines_after > 0 &&
-           (pos = text.find('\n', pos)) != std::string::npos) {
-        pos++;
-        lines_after--;
-    }
-    return text.substr(start_pos, (pos == std::string::npos) ?
-                       std::string::npos : pos - start_pos);
-}
-
-bool getExecPath(std::string &path) {
-    char buf[PATH_MAX + 1];
-    int ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
-    if (ret < 0) {
-        return false;
-    }
-    buf[ret] = '\0';
-    path = buf;
-    return true;
-}
-
-/* Child synchronization primitives */
-#define STATE_INIT 0
-#define STATE_CHILD_READY 1
-#define STATE_PARENT_READY 2
-
-struct state_sync {
-    pthread_mutex_t mutex;
-    pthread_cond_t condition;
-    int state;
-};
-
-struct state_sync * init_state_sync_obj() {
-    struct state_sync *ssync;
-
-    ssync = (struct state_sync*)mmap(NULL, sizeof(struct state_sync),
-                PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
-    if (ssync == MAP_FAILED) {
-        return NULL;
-    }
-
-    pthread_mutexattr_t mattr;
-    pthread_mutexattr_init(&mattr);
-    pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
-    pthread_mutex_init(&ssync->mutex, &mattr);
-
-    pthread_condattr_t cattr;
-    pthread_condattr_init(&cattr);
-    pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
-    pthread_cond_init(&ssync->condition, &cattr);
-
-    ssync->state = STATE_INIT;
-    return ssync;
-}
-
-void destroy_state_sync_obj(struct state_sync *ssync) {
-    pthread_cond_destroy(&ssync->condition);
-    pthread_mutex_destroy(&ssync->mutex);
-    munmap(ssync, sizeof(struct state_sync));
-}
-
-void signal_state(struct state_sync *ssync, int state) {
-    pthread_mutex_lock(&ssync->mutex);
-    ssync->state = state;
-    pthread_cond_signal(&ssync->condition);
-    pthread_mutex_unlock(&ssync->mutex);
-}
-
-void wait_for_state(struct state_sync *ssync, int state) {
-    pthread_mutex_lock(&ssync->mutex);
-    while (ssync->state != state) {
-        pthread_cond_wait(&ssync->condition, &ssync->mutex);
-    }
-    pthread_mutex_unlock(&ssync->mutex);
-}
-
-/* Memory allocation and data sharing */
-struct shared_data {
-    size_t allocated;
-    bool finished;
-    size_t total_size;
-    size_t step_size;
-    size_t step_delay;
-    int oomadj;
-};
-
-volatile void *gptr;
-void add_pressure(struct shared_data *data) {
-    volatile void *ptr;
-    size_t allocated_size = 0;
-
-    data->finished = false;
-    while (allocated_size < data->total_size) {
-        ptr = mmap(NULL, data->step_size, PROT_READ | PROT_WRITE,
-                MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
-        if (ptr != MAP_FAILED) {
-            /* create ptr aliasing to prevent compiler optimizing the access */
-            gptr = ptr;
-            /* make data non-zero */
-            memset((void*)ptr, (int)(allocated_size + 1), data->step_size);
-            allocated_size += data->step_size;
-            data->allocated = allocated_size;
-        }
-        usleep(data->step_delay);
-    }
-    data->finished = (allocated_size >= data->total_size);
-}
-
-/* Memory stress test main body */
-void runMemStressTest() {
-    struct shared_data *data;
-    struct state_sync *ssync;
-    int sock;
-    pid_t pid;
-    uid_t uid = getuid();
-
-    // check if in-kernel LMK driver is present
-    if (!access(INKERNEL_MINFREE_PATH, W_OK)) {
-        GTEST_LOG_(INFO) << "Must not have kernel lowmemorykiller driver,"
-                         << " terminating test";
-        return;
-    }
-
-    ASSERT_FALSE((sock = lmkd_connect()) < 0)
-        << "Failed to connect to lmkd process, err=" << strerror(errno);
-
-    /* allocate shared memory to communicate params with a child */
-    data = (struct shared_data*)mmap(NULL, sizeof(struct shared_data),
-                PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, -1, 0);
-    ASSERT_FALSE(data == MAP_FAILED) << "Memory allocation failure";
-    data->total_size = (size_t)-1; /* allocate until killed */
-    data->step_size = ALLOC_STEP;
-    data->step_delay = ALLOC_DELAY;
-
-    /* allocate state sync object */
-    ASSERT_FALSE((ssync = init_state_sync_obj()) == NULL)
-        << "Memory allocation failure";
-
-    /* run the test gradually decreasing oomadj */
-    data->oomadj = OOM_ADJ_MAX;
-    while (data->oomadj >= OOM_ADJ_MIN) {
-        ASSERT_FALSE((pid = fork()) < 0)
-            << "Failed to spawn a child process, err=" << strerror(errno);
-        if (pid != 0) {
-            /* Parent */
-            struct lmk_procprio params;
-            /* wait for child to start and get ready */
-            wait_for_state(ssync, STATE_CHILD_READY);
-            params.pid = pid;
-            params.uid = uid;
-            params.oomadj = data->oomadj;
-            ASSERT_FALSE(lmkd_register_proc(sock, &params) < 0)
-                << "Failed to communicate with lmkd, err=" << strerror(errno);
-            // signal the child it can proceed
-            signal_state(ssync, STATE_PARENT_READY);
-            waitpid(pid, NULL, 0);
-            if (data->finished) {
-                GTEST_LOG_(INFO) << "Child [pid=" << pid << "] allocated "
-                                 << data->allocated / ONE_MB << "MB";
-            } else {
-                GTEST_LOG_(INFO) << "Child [pid=" << pid << "] allocated "
-                                 << data->allocated / ONE_MB
-                                 << "MB before being killed";
-            }
-            data->oomadj -= OOM_ADJ_STEP;
-        } else {
-            /* Child */
-            pid = getpid();
-            GTEST_LOG_(INFO) << "Child [pid=" << pid
-                             << "] is running at oomadj="
-                             << data->oomadj;
-            data->allocated = 0;
-            data->finished = false;
-            ASSERT_FALSE(create_memcg(uid, pid) != 0)
-                << "Child [pid=" << pid << "] failed to create a cgroup";
-            signal_state(ssync, STATE_CHILD_READY);
-            wait_for_state(ssync, STATE_PARENT_READY);
-            add_pressure(data);
-            /* should not reach here, child should be killed by OOM/LMK */
-            FAIL() << "Child [pid=" << pid << "] was not killed";
-            break;
-        }
-    }
-    destroy_state_sync_obj(ssync);
-    munmap(data, sizeof(struct shared_data));
-    close(sock);
-}
-
-TEST(lmkd, check_for_oom) {
-    // test requirements
-    //   userdebug build
-    if (!__android_log_is_debuggable()) {
-        GTEST_LOG_(INFO) << "Must be userdebug build, terminating test";
-        return;
-    }
-
-    // if respawned test process then run the test and exit (no analysis)
-    if (getenv(LMKDTEST_RESPAWN_FLAG) != NULL) {
-        runMemStressTest();
-        return;
-    }
-
-    // Main test process
-    // mark the beginning of the test
-    std::string marker = StringPrintf(
-        "LMKD test start %lu\n", static_cast<unsigned long>(time(nullptr)));
-    ASSERT_TRUE(writeKmsg(marker));
-
-    // get executable complete path
-    std::string test_path;
-    ASSERT_TRUE(getExecPath(test_path));
-
-    std::string test_output;
-    if (getuid() != static_cast<unsigned>(AID_ROOT)) {
-        // if not root respawn itself as root and capture output
-        std::string command = StringPrintf(
-            "%s=true su root %s 2>&1", LMKDTEST_RESPAWN_FLAG,
-            test_path.c_str());
-        std::string test_output = readCommand(command);
-        GTEST_LOG_(INFO) << test_output;
-    } else {
-        // main test process is root, run the test
-        runMemStressTest();
-    }
-
-    // Analyze results
-    // capture logcat containind kernel logs
-    std::string logcat_out = readLogcat(marker);
-
-    // 1. extract LMKD kills from logcat output, count kills
-    std::stringstream kill_logs;
-    int hit_count = 0;
-    size_t pos = 0;
-    marker = StringPrintf(LMKD_KILL_MARKER_TEMPLATE, test_path.c_str());
-
-    while (true) {
-        if ((pos = logcat_out.find(marker, pos)) != std::string::npos) {
-            kill_logs << getTextAround(logcat_out, pos, 0, 1);
-            pos += marker.length();
-            hit_count++;
-        } else {
-            break;
-        }
-    }
-    GTEST_LOG_(INFO) << "====Logged kills====" << std::endl
-                     << kill_logs.str();
-    EXPECT_TRUE(hit_count == STEP_COUNT) << "Number of kills " << hit_count
-                                         << " is less than expected "
-                                         << STEP_COUNT;
-
-    // 2. check kernel logs for OOM kills
-    pos = logcat_out.find(OOM_MARKER);
-    bool oom_detected = (pos != std::string::npos);
-    bool oom_kill_detected = (oom_detected &&
-        logcat_out.find(OOM_KILL_MARKER, pos) != std::string::npos);
-
-    EXPECT_FALSE(oom_kill_detected) << "OOM kill is detected!";
-    if (oom_detected || oom_kill_detected) {
-        // capture logcat with logs around all OOMs
-        pos = 0;
-        while ((pos = logcat_out.find(OOM_MARKER, pos)) != std::string::npos) {
-            GTEST_LOG_(INFO) << "====Logs around OOM====" << std::endl
-                             << getTextAround(logcat_out, pos,
-                                    MIN_LOG_SIZE / 2, MIN_LOG_SIZE / 2);
-            pos += strlen(OOM_MARKER);
-        }
-    }
-
-    // output complete logcat with kernel (might get truncated)
-    GTEST_LOG_(INFO) << "====Complete logcat output====" << std::endl
-                     << logcat_out;
-}
-
diff --git a/logcat/Android.bp b/logcat/Android.bp
index e6b0c7d..61fba59 100644
--- a/logcat/Android.bp
+++ b/logcat/Android.bp
@@ -21,6 +21,7 @@
         "-Wall",
         "-Wextra",
         "-Werror",
+        "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION=1",
     ],
     shared_libs: [
         "libbase",
@@ -35,19 +36,13 @@
 
     defaults: ["logcat_defaults"],
     srcs: [
-        "logcat_main.cpp",
         "logcat.cpp",
     ],
 }
 
-cc_binary {
+sh_binary {
     name: "logcatd",
-
-    defaults: ["logcat_defaults"],
-    srcs: [
-        "logcatd_main.cpp",
-        "logcat.cpp",
-    ],
+    src: "logcatd",
 }
 
 sh_binary {
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 4dcb338..08e3d22 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -14,18 +14,13 @@
  * limitations under the License.
  */
 
-#include "logcat.h"
-
-#include <android-base/macros.h>
-#include <arpa/inet.h>
-#include <assert.h>
 #include <ctype.h>
 #include <dirent.h>
 #include <errno.h>
+#include <error.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <math.h>
-#include <pthread.h>
 #include <sched.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -34,13 +29,11 @@
 #include <sys/cdefs.h>
 #include <sys/ioctl.h>
 #include <sys/resource.h>
-#include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
-#include <atomic>
 #include <memory>
 #include <regex>
 #include <string>
@@ -48,11 +41,15 @@
 #include <vector>
 
 #include <android-base/file.h>
+#include <android-base/macros.h>
+#include <android-base/parseint.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
-#include <cutils/sockets.h>
+#include <android-base/unique_fd.h>
+#include <android/log.h>
 #include <log/event_tag_map.h>
+#include <log/log_id.h>
 #include <log/logprint.h>
 #include <private/android_logger.h>
 #include <processgroup/sched_policy.h>
@@ -60,112 +57,60 @@
 
 #define DEFAULT_MAX_ROTATED_LOGS 4
 
-struct log_device_t {
-    const char* device;
-    bool binary;
-    struct logger* logger;
-    struct logger_list* logger_list;
-    bool printed;
+using android::base::Join;
+using android::base::ParseByteCount;
+using android::base::ParseUint;
+using android::base::Split;
+using android::base::StringPrintf;
 
-    log_device_t* next;
+class Logcat {
+  public:
+    int Run(int argc, char** argv);
 
-    log_device_t(const char* d, bool b) {
-        device = d;
-        binary = b;
-        next = nullptr;
-        printed = false;
-        logger = nullptr;
-        logger_list = nullptr;
-    }
+  private:
+    void RotateLogs();
+    void ProcessBuffer(struct log_msg* buf);
+    void PrintDividers(log_id_t log_id, bool print_dividers);
+    void SetupOutputAndSchedulingPolicy(bool blocking);
+    int SetLogFormat(const char* format_string);
+
+    // Used for all options
+    android::base::unique_fd output_fd_{dup(STDOUT_FILENO)};
+    std::unique_ptr<AndroidLogFormat, decltype(&android_log_format_free)> logformat_{
+            android_log_format_new(), &android_log_format_free};
+
+    // For logging to a file and log rotation
+    const char* output_file_name_ = nullptr;
+    size_t log_rotate_size_kb_ = 0;                       // 0 means "no log rotation"
+    size_t max_rotated_logs_ = DEFAULT_MAX_ROTATED_LOGS;  // 0 means "unbounded"
+    size_t out_byte_count_ = 0;
+
+    // For binary log buffers
+    int print_binary_ = 0;
+    std::unique_ptr<EventTagMap, decltype(&android_closeEventTagMap)> event_tag_map_{
+            nullptr, &android_closeEventTagMap};
+    bool has_opened_event_tag_map_ = false;
+
+    // For the related --regex, --max-count, --print
+    std::unique_ptr<std::regex> regex_;
+    size_t max_count_ = 0;  // 0 means "infinite"
+    size_t print_count_ = 0;
+    bool print_it_anyways_ = false;
+
+    // For PrintDividers()
+    log_id_t last_printed_id_ = LOG_ID_MAX;
+    bool printed_start_[LOG_ID_MAX] = {};
+
+    bool debug_ = false;
 };
 
-struct android_logcat_context_internal {
-    // status
-    volatile std::atomic_int retval;  // valid if thread_stopped set
-    // Arguments passed in, or copies and storage thereof if a thread.
-    int argc;
-    char* const* argv;
-    char* const* envp;
-    std::vector<std::string> args;
-    std::vector<const char*> argv_hold;
-    std::vector<std::string> envs;
-    std::vector<const char*> envp_hold;
-    int output_fd;  // duplication of fileno(output) (below)
-    int error_fd;   // duplication of fileno(error) (below)
-
-    // library
-    int fds[2];    // From popen call
-    FILE* output;  // everything writes to fileno(output), buffer unused
-    FILE* error;   // unless error == output.
-    pthread_t thr;
-    volatile std::atomic_bool stop;  // quick exit flag
-    volatile std::atomic_bool thread_stopped;
-    bool stderr_null;    // shell "2>/dev/null"
-    bool stderr_stdout;  // shell "2>&1"
-
-    // global variables
-    AndroidLogFormat* logformat;
-    const char* outputFileName;
-    // 0 means "no log rotation"
-    size_t logRotateSizeKBytes;
-    // 0 means "unbounded"
-    size_t maxRotatedLogs;
-    size_t outByteCount;
-    int printBinary;
-    int devCount;  // >1 means multiple
-    std::unique_ptr<std::regex> regex;
-    log_device_t* devices;
-    EventTagMap* eventTagMap;
-    // 0 means "infinite"
-    size_t maxCount;
-    size_t printCount;
-
-    bool printItAnyways;
-    bool debug;
-    bool hasOpenedEventTagMap;
-};
-
-// Creates a context associated with this logcat instance
-android_logcat_context create_android_logcat() {
-    android_logcat_context_internal* context;
-
-    context = (android_logcat_context_internal*)calloc(
-        1, sizeof(android_logcat_context_internal));
-    if (!context) return nullptr;
-
-    context->fds[0] = -1;
-    context->fds[1] = -1;
-    context->output_fd = -1;
-    context->error_fd = -1;
-    context->maxRotatedLogs = DEFAULT_MAX_ROTATED_LOGS;
-
-    context->argv_hold.clear();
-    context->args.clear();
-    context->envp_hold.clear();
-    context->envs.clear();
-
-    return (android_logcat_context)context;
-}
-
-// logd prefixes records with a length field
-#define RECORD_LENGTH_FIELD_SIZE_BYTES sizeof(uint32_t)
-
-namespace android {
-
-enum helpType { HELP_FALSE, HELP_TRUE, HELP_FORMAT };
-
-// if showHelp is set, newline required in fmt statement to transition to usage
-static void logcat_panic(android_logcat_context_internal* context,
-                         enum helpType showHelp, const char* fmt, ...)
-    __printflike(3, 4);
-
 #ifndef F2FS_IOC_SET_PIN_FILE
 #define F2FS_IOCTL_MAGIC       0xf5
 #define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13, __u32)
 #endif
 
 static int openLogFile(const char* pathname, size_t sizeKB) {
-    int fd = open(pathname, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
+    int fd = open(pathname, O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IRGRP);
     if (fd < 0) {
         return fd;
     }
@@ -177,107 +122,29 @@
     return fd;
 }
 
-static void close_output(android_logcat_context_internal* context) {
-    // split output_from_error
-    if (context->error == context->output) {
-        context->output = nullptr;
-        context->output_fd = -1;
-    }
-    if (context->error && (context->output_fd == fileno(context->error))) {
-        context->output_fd = -1;
-    }
-    if (context->output_fd == context->error_fd) {
-        context->output_fd = -1;
-    }
-    // close output channel
-    if (context->output) {
-        if (context->output != stdout) {
-            if (context->output_fd == fileno(context->output)) {
-                context->output_fd = -1;
-            }
-            if (context->fds[1] == fileno(context->output)) {
-                context->fds[1] = -1;
-            }
-            fclose(context->output);
-        }
-        context->output = nullptr;
-    }
-    if (context->output_fd >= 0) {
-        if (context->output_fd != fileno(stdout)) {
-            if (context->fds[1] == context->output_fd) {
-                context->fds[1] = -1;
-            }
-            posix_fadvise(context->output_fd, 0, 0, POSIX_FADV_DONTNEED);
-            close(context->output_fd);
-        }
-        context->output_fd = -1;
-    }
-}
-
-static void close_error(android_logcat_context_internal* context) {
-    // split error_from_output
-    if (context->output == context->error) {
-        context->error = nullptr;
-        context->error_fd = -1;
-    }
-    if (context->output && (context->error_fd == fileno(context->output))) {
-        context->error_fd = -1;
-    }
-    if (context->error_fd == context->output_fd) {
-        context->error_fd = -1;
-    }
-    // close error channel
-    if (context->error) {
-        if ((context->error != stderr) && (context->error != stdout)) {
-            if (context->error_fd == fileno(context->error)) {
-                context->error_fd = -1;
-            }
-            if (context->fds[1] == fileno(context->error)) {
-                context->fds[1] = -1;
-            }
-            fclose(context->error);
-        }
-        context->error = nullptr;
-    }
-    if (context->error_fd >= 0) {
-        if ((context->error_fd != fileno(stdout)) &&
-            (context->error_fd != fileno(stderr))) {
-            if (context->fds[1] == context->error_fd) context->fds[1] = -1;
-            close(context->error_fd);
-        }
-        context->error_fd = -1;
-    }
-}
-
-static void rotateLogs(android_logcat_context_internal* context) {
-    int err;
-
+void Logcat::RotateLogs() {
     // Can't rotate logs if we're not outputting to a file
-    if (!context->outputFileName) return;
+    if (!output_file_name_) return;
 
-    close_output(context);
+    output_fd_.reset();
 
     // Compute the maximum number of digits needed to count up to
     // maxRotatedLogs in decimal.  eg:
     // maxRotatedLogs == 30
     //   -> log10(30) == 1.477
     //   -> maxRotationCountDigits == 2
-    int maxRotationCountDigits =
-        (context->maxRotatedLogs > 0)
-            ? (int)(floor(log10(context->maxRotatedLogs) + 1))
-            : 0;
+    int max_rotation_count_digits =
+            max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
 
-    for (int i = context->maxRotatedLogs; i > 0; i--) {
-        std::string file1 = android::base::StringPrintf(
-            "%s.%.*d", context->outputFileName, maxRotationCountDigits, i);
+    for (int i = max_rotated_logs_; i > 0; i--) {
+        std::string file1 =
+                StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
 
         std::string file0;
         if (!(i - 1)) {
-            file0 = android::base::StringPrintf("%s", context->outputFileName);
+            file0 = output_file_name_;
         } else {
-            file0 =
-                android::base::StringPrintf("%s.%.*d", context->outputFileName,
-                                            maxRotationCountDigits, i - 1);
+            file0 = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i - 1);
         }
 
         if (!file0.length() || !file1.length()) {
@@ -285,237 +152,200 @@
             break;
         }
 
-        err = rename(file0.c_str(), file1.c_str());
+        int err = rename(file0.c_str(), file1.c_str());
 
         if (err < 0 && errno != ENOENT) {
             perror("while rotating log files");
         }
     }
 
-    context->output_fd = openLogFile(context->outputFileName, context->logRotateSizeKBytes);
+    output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
 
-    if (context->output_fd < 0) {
-        logcat_panic(context, HELP_FALSE, "couldn't open output file");
-        return;
-    }
-    context->output = fdopen(context->output_fd, "web");
-    if (!context->output) {
-        logcat_panic(context, HELP_FALSE, "couldn't fdopen output file");
-        return;
-    }
-    if (context->stderr_stdout) {
-        close_error(context);
-        context->error = context->output;
-        context->error_fd = context->output_fd;
+    if (!output_fd_.ok()) {
+        error(EXIT_FAILURE, errno, "Couldn't open output file");
     }
 
-    context->outByteCount = 0;
+    out_byte_count_ = 0;
 }
 
-void printBinary(android_logcat_context_internal* context, struct log_msg* buf) {
-    size_t size = buf->len();
-
-    TEMP_FAILURE_RETRY(write(context->output_fd, buf, size));
-}
-
-static bool regexOk(android_logcat_context_internal* context,
-                    const AndroidLogEntry& entry) {
-    if (!context->regex) return true;
-
-    return std::regex_search(entry.message, entry.message + entry.messageLen, *context->regex);
-}
-
-static void processBuffer(android_logcat_context_internal* context,
-                          log_device_t* dev, struct log_msg* buf) {
+void Logcat::ProcessBuffer(struct log_msg* buf) {
     int bytesWritten = 0;
     int err;
     AndroidLogEntry entry;
     char binaryMsgBuf[1024];
 
-    if (dev->binary) {
-        if (!context->eventTagMap && !context->hasOpenedEventTagMap) {
-            context->eventTagMap = android_openEventTagMap(nullptr);
-            context->hasOpenedEventTagMap = true;
+    bool is_binary =
+            buf->id() == LOG_ID_EVENTS || buf->id() == LOG_ID_STATS || buf->id() == LOG_ID_SECURITY;
+
+    if (is_binary) {
+        if (!event_tag_map_ && !has_opened_event_tag_map_) {
+            event_tag_map_.reset(android_openEventTagMap(nullptr));
+            has_opened_event_tag_map_ = true;
         }
-        err = android_log_processBinaryLogBuffer(
-            &buf->entry_v1, &entry, context->eventTagMap, binaryMsgBuf,
-            sizeof(binaryMsgBuf));
+        err = android_log_processBinaryLogBuffer(&buf->entry, &entry, event_tag_map_.get(),
+                                                 binaryMsgBuf, sizeof(binaryMsgBuf));
         // printf(">>> pri=%d len=%d msg='%s'\n",
         //    entry.priority, entry.messageLen, entry.message);
     } else {
-        err = android_log_processLogBuffer(&buf->entry_v1, &entry);
+        err = android_log_processLogBuffer(&buf->entry, &entry);
     }
-    if ((err < 0) && !context->debug) return;
+    if (err < 0 && !debug_) return;
 
-    if (android_log_shouldPrintLine(
-            context->logformat, std::string(entry.tag, entry.tagLen).c_str(),
-            entry.priority)) {
-        bool match = regexOk(context, entry);
+    if (android_log_shouldPrintLine(logformat_.get(), std::string(entry.tag, entry.tagLen).c_str(),
+                                    entry.priority)) {
+        bool match = !regex_ ||
+                     std::regex_search(entry.message, entry.message + entry.messageLen, *regex_);
 
-        context->printCount += match;
-        if (match || context->printItAnyways) {
-            bytesWritten = android_log_printLogLine(context->logformat,
-                                                    context->output_fd, &entry);
+        print_count_ += match;
+        if (match || print_it_anyways_) {
+            bytesWritten = android_log_printLogLine(logformat_.get(), output_fd_.get(), &entry);
 
             if (bytesWritten < 0) {
-                logcat_panic(context, HELP_FALSE, "output error");
-                return;
+                error(EXIT_FAILURE, 0, "Output error.");
             }
         }
     }
 
-    context->outByteCount += bytesWritten;
+    out_byte_count_ += bytesWritten;
 
-    if (context->logRotateSizeKBytes > 0 &&
-        (context->outByteCount / 1024) >= context->logRotateSizeKBytes) {
-        rotateLogs(context);
+    if (log_rotate_size_kb_ > 0 && (out_byte_count_ / 1024) >= log_rotate_size_kb_) {
+        RotateLogs();
     }
 }
 
-static void maybePrintStart(android_logcat_context_internal* context,
-                            log_device_t* dev, bool printDividers) {
-    if (!dev->printed || printDividers) {
-        if (context->devCount > 1 && !context->printBinary) {
-            char buf[1024];
-            snprintf(buf, sizeof(buf), "--------- %s %s\n",
-                     dev->printed ? "switch to" : "beginning of", dev->device);
-            if (write(context->output_fd, buf, strlen(buf)) < 0) {
-                logcat_panic(context, HELP_FALSE, "output error");
-                return;
-            }
+void Logcat::PrintDividers(log_id_t log_id, bool print_dividers) {
+    if (log_id == last_printed_id_ || print_binary_) {
+        return;
+    }
+    if (!printed_start_[log_id] || print_dividers) {
+        if (dprintf(output_fd_.get(), "--------- %s %s\n",
+                    printed_start_[log_id] ? "switch to" : "beginning of",
+                    android_log_id_to_name(log_id)) < 0) {
+            error(EXIT_FAILURE, errno, "Output error");
         }
-        dev->printed = true;
     }
+    last_printed_id_ = log_id;
+    printed_start_[log_id] = true;
 }
 
-static void setupOutputAndSchedulingPolicy(
-    android_logcat_context_internal* context, bool blocking) {
-    if (!context->outputFileName) return;
+void Logcat::SetupOutputAndSchedulingPolicy(bool blocking) {
+    if (!output_file_name_) return;
 
     if (blocking) {
         // Lower priority and set to batch scheduling if we are saving
         // the logs into files and taking continuous content.
-        if ((set_sched_policy(0, SP_BACKGROUND) < 0) && context->error) {
-            fprintf(context->error,
-                    "failed to set background scheduling policy\n");
+        if (set_sched_policy(0, SP_BACKGROUND) < 0) {
+            fprintf(stderr, "failed to set background scheduling policy\n");
         }
 
-        struct sched_param param;
-        memset(&param, 0, sizeof(param));
+        struct sched_param param = {};
         if (sched_setscheduler((pid_t)0, SCHED_BATCH, &param) < 0) {
             fprintf(stderr, "failed to set to batch scheduler\n");
         }
 
-        if ((setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) &&
-            context->error) {
-            fprintf(context->error, "failed set to priority\n");
+        if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
+            fprintf(stderr, "failed set to priority\n");
         }
     }
 
-    close_output(context);
+    output_fd_.reset(openLogFile(output_file_name_, log_rotate_size_kb_));
 
-    context->output_fd = openLogFile(context->outputFileName, context->logRotateSizeKBytes);
-
-    if (context->output_fd < 0) {
-        logcat_panic(context, HELP_FALSE, "couldn't open output file");
-        return;
+    if (!output_fd_.ok()) {
+        error(EXIT_FAILURE, errno, "Couldn't open output file");
     }
 
     struct stat statbuf;
-    if (fstat(context->output_fd, &statbuf) == -1) {
-        close_output(context);
-        logcat_panic(context, HELP_FALSE, "couldn't get output file stat\n");
-        return;
+    if (fstat(output_fd_.get(), &statbuf) == -1) {
+        error(EXIT_FAILURE, errno, "Couldn't get output file stat");
     }
 
     if ((size_t)statbuf.st_size > SIZE_MAX || statbuf.st_size < 0) {
-        close_output(context);
-        logcat_panic(context, HELP_FALSE, "invalid output file stat\n");
-        return;
+        error(EXIT_FAILURE, 0, "Invalid output file stat.");
     }
 
-    context->output = fdopen(context->output_fd, "web");
-
-    context->outByteCount = statbuf.st_size;
+    out_byte_count_ = statbuf.st_size;
 }
 
 // clang-format off
-static void show_help(android_logcat_context_internal* context) {
-    if (!context->error) return;
+static void show_help() {
+    const char* cmd = getprogname();
 
-    const char* cmd = strrchr(context->argv[0], '/');
-    cmd = cmd ? cmd + 1 : context->argv[0];
+    fprintf(stderr, "Usage: %s [options] [filterspecs]\n", cmd);
 
-    fprintf(context->error, "Usage: %s [options] [filterspecs]\n", cmd);
+    fprintf(stderr, R"init(
+General options:
+  -b, --buffer=<buffer>       Request alternate ring buffer(s):
+                                main system radio events crash default all
+                              Additionally, 'kernel' for userdebug and eng builds, and
+                              'security' for Device Owner installations.
+                              Multiple -b parameters or comma separated list of buffers are
+                              allowed. Buffers are interleaved.
+                              Default -b main,system,crash,kernel.
+  -L, --last                  Dump logs from prior to last reboot from pstore.
+  -c, --clear                 Clear (flush) the entire log and exit.
+                              if -f is specified, clear the specified file and its related rotated
+                              log files instead.
+                              if -L is specified, clear pstore log instead.
+  -d                          Dump the log and then exit (don't block).
+  --pid=<pid>                 Only print logs from the given pid.
+  --wrap                      Sleep for 2 hours or when buffer about to wrap whichever
+                              comes first. Improves efficiency of polling by providing
+                              an about-to-wrap wakeup.
 
-    fprintf(context->error, "options include:\n"
-                    "  -s              Set default filter to silent. Equivalent to filterspec '*:S'\n"
-                    "  -f <file>, --file=<file>               Log to file. Default is stdout\n"
-                    "  -r <kbytes>, --rotate-kbytes=<kbytes>\n"
-                    "                  Rotate log every kbytes. Requires -f option\n"
-                    "  -n <count>, --rotate-count=<count>\n"
-                    "                  Sets max number of rotated logs to <count>, default 4\n"
-                    "  --id=<id>       If the signature id for logging to file changes, then clear\n"
-                    "                  the fileset and continue\n"
-                    "  -v <format>, --format=<format>\n"
-                    "                  Sets log print format verb and adverbs, where <format> is:\n"
-                    "                    brief help long process raw tag thread threadtime time\n"
-                    "                  and individually flagged modifying adverbs can be added:\n"
-                    "                    color descriptive epoch monotonic printable uid\n"
-                    "                    usec UTC year zone\n"
-                    "                  Multiple -v parameters or comma separated list of format and\n"
-                    "                  format modifiers are allowed.\n"
-                    // private and undocumented nsec, no signal, too much noise
-                    // useful for -T or -t <timestamp> accurate testing though.
-                    "  -D, --dividers  Print dividers between each log buffer\n"
-                    "  -c, --clear     Clear (flush) the entire log and exit\n"
-                    "                  if Log to File specified, clear fileset instead\n"
-                    "  -d              Dump the log and then exit (don't block)\n"
-                    "  -e <expr>, --regex=<expr>\n"
-                    "                  Only print lines where the log message matches <expr>\n"
-                    "                  where <expr> is a regular expression\n"
-                    // Leave --head undocumented as alias for -m
-                    "  -m <count>, --max-count=<count>\n"
-                    "                  Quit after printing <count> lines. This is meant to be\n"
-                    "                  paired with --regex, but will work on its own.\n"
-                    "  --print         Paired with --regex and --max-count to let content bypass\n"
-                    "                  regex filter but still stop at number of matches.\n"
-                    // Leave --tail undocumented as alias for -t
-                    "  -t <count>      Print only the most recent <count> lines (implies -d)\n"
-                    "  -t '<time>'     Print most recent lines since specified time (implies -d)\n"
-                    "  -T <count>      Print only the most recent <count> lines (does not imply -d)\n"
-                    "  -T '<time>'     Print most recent lines since specified time (not imply -d)\n"
-                    "                  count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'\n"
-                    "                  'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format\n"
-                    "  -g, --buffer-size                      Get the size of the ring buffer.\n"
-                    "  -G <size>, --buffer-size=<size>\n"
-                    "                  Set size of log ring buffer, may suffix with K or M.\n"
-                    "  -L, --last      Dump logs from prior to last reboot\n"
-                    "  -b <buffer>, --buffer=<buffer>         Request alternate ring buffer, 'main',\n"
-                    "                  'system', 'radio', 'events', 'crash', 'default' or 'all'.\n"
-                    "                  Additionally, 'kernel' for userdebug and eng builds, and\n"
-                    "                  'security' for Device Owner installations.\n"
-                    "                  Multiple -b parameters or comma separated list of buffers are\n"
-                    "                  allowed. Buffers interleaved.\n"
-                    "                  Default -b main,system,crash,kernel.\n"
-                    "  -B, --binary    Output the log in binary.\n"
-                    "  -S, --statistics                       Output statistics.\n"
-                    "  -p, --prune     Print prune white and ~black list. Service is specified as\n"
-                    "                  UID, UID/PID or /PID. Weighed for quicker pruning if prefix\n"
-                    "                  with ~, otherwise weighed for longevity if unadorned. All\n"
-                    "                  other pruning activity is oldest first. Special case ~!\n"
-                    "                  represents an automatic quicker pruning for the noisiest\n"
-                    "                  UID as determined by the current statistics.\n"
-                    "  -P '<list> ...', --prune='<list> ...'\n"
-                    "                  Set prune white and ~black list, using same format as\n"
-                    "                  listed above. Must be quoted.\n"
-                    "  --pid=<pid>     Only prints logs from the given pid.\n"
-                    // Check ANDROID_LOG_WRAP_DEFAULT_TIMEOUT value for match to 2 hours
-                    "  --wrap          Sleep for 2 hours or when buffer about to wrap whichever\n"
-                    "                  comes first. Improves efficiency of polling by providing\n"
-                    "                  an about-to-wrap wakeup.\n");
+Formatting:
+  -v, --format=<format>       Sets log print format verb and adverbs, where <format> is one of:
+                                brief help long process raw tag thread threadtime time
+                              Modifying adverbs can be added:
+                                color descriptive epoch monotonic printable uid usec UTC year zone
+                              Multiple -v parameters or comma separated list of format and format
+                              modifiers are allowed.
+  -D, --dividers              Print dividers between each log buffer.
+  -B, --binary                Output the log in binary.
 
-    fprintf(context->error, "\nfilterspecs are a series of \n"
+Outfile files:
+  -f, --file=<file>           Log to file instead of stdout.
+  -r, --rotate-kbytes=<n>     Rotate log every <n> kbytes. Requires -f option.
+  -n, --rotate-count=<count>  Sets max number of rotated logs to <count>, default 4.
+  --id=<id>                   If the signature <id> for logging to file changes, then clear the
+                              associated files and continue.
+
+Logd control:
+ These options send a control message to the logd daemon on device, print its return message if
+ applicable, then exit. They are incompatible with -L, as these attributes do not apply to pstore.
+  -g, --buffer-size           Get the size of the ring buffers within logd.
+  -G, --buffer-size=<size>    Set size of a ring buffer in logd. May suffix with K or M.
+                              This can individually control each buffer's size with -b.
+  -S, --statistics            Output statistics.
+                              --pid can be used to provide pid specific stats.
+  -p, --prune                 Print prune white and ~black list. Service is specified as UID,
+                              UID/PID or /PID. Weighed for quicker pruning if prefix with ~,
+                              otherwise weighed for longevity if unadorned. All other pruning
+                              activity is oldest first. Special case ~! represents an automatic
+                              quicker pruning for the noisiest UID as determined by the current
+                              statistics.
+  -P, --prune='<list> ...'    Set prune white and ~black list, using same format as listed above.
+                              Must be quoted.
+
+Filtering:
+  -s                          Set default filter to silent. Equivalent to filterspec '*:S'
+  -e, --regex=<expr>          Only print lines where the log message matches <expr> where <expr> is
+                              an ECMAScript regular expression.
+  -m, --max-count=<count>     Quit after printing <count> lines. This is meant to be paired with
+                              --regex, but will work on its own.
+  --print                     This option is only applicable when --regex is set and only useful if
+                              --max-count is also provided.
+                              With --print, logcat will print all messages even if they do not
+                              match the regex. Logcat will quit after printing the max-count number
+                              of lines that match the regex.
+  -t <count>                  Print only the most recent <count> lines (implies -d).
+  -t '<time>'                 Print the lines since specified time (implies -d).
+  -T <count>                  Print only the most recent <count> lines (does not imply -d).
+  -T '<time>'                 Print the lines since specified time (not imply -d).
+                              count is pure numerical, time is 'MM-DD hh:mm:ss.mmm...'
+                              'YYYY-MM-DD hh:mm:ss.mmm...' or 'sssss.mmm...' format.
+)init");
+
+    fprintf(stderr, "\nfilterspecs are a series of \n"
                    "  <tag>[:priority]\n\n"
                    "where <tag> is a log component tag (or * for all) and priority is:\n"
                    "  V    Verbose (default for <tag>)\n"
@@ -533,9 +363,8 @@
                    "or defaults to \"threadtime\"\n\n");
 }
 
-static void show_format_help(android_logcat_context_internal* context) {
-    if (!context->error) return;
-    fprintf(context->error,
+static void show_format_help() {
+    fprintf(stderr,
         "-v <format>, --format=<format> options:\n"
         "  Sets log print format verb and adverbs, where <format> is:\n"
         "    brief long process raw tag thread threadtime time\n"
@@ -569,16 +398,13 @@
 }
 // clang-format on
 
-static int setLogFormat(android_logcat_context_internal* context,
-                        const char* formatString) {
-    AndroidLogPrintFormat format;
-
-    format = android_log_formatFromString(formatString);
+int Logcat::SetLogFormat(const char* format_string) {
+    AndroidLogPrintFormat format = android_log_formatFromString(format_string);
 
     // invalid string?
     if (format == FORMAT_OFF) return -1;
 
-    return android_log_setPrintFormat(context->logformat, format);
+    return android_log_setPrintFormat(logformat_.get(), format);
 }
 
 static std::pair<unsigned long, const char*> format_of_size(unsigned long value) {
@@ -591,51 +417,6 @@
     return std::make_pair(value, multipliers[i]);
 }
 
-// String to unsigned int, returns -1 if it fails
-static bool getSizeTArg(const char* ptr, size_t* val, size_t min = 0,
-                        size_t max = SIZE_MAX) {
-    if (!ptr) return false;
-
-    char* endp;
-    errno = 0;
-    size_t ret = (size_t)strtoll(ptr, &endp, 0);
-
-    if (endp[0] || errno) return false;
-
-    if ((ret > max) || (ret < min)) return false;
-
-    *val = ret;
-    return true;
-}
-
-static void logcat_panic(android_logcat_context_internal* context,
-                         enum helpType showHelp, const char* fmt, ...) {
-    context->retval = EXIT_FAILURE;
-    if (!context->error) {
-        context->stop = true;
-        return;
-    }
-
-    va_list args;
-    va_start(args, fmt);
-    vfprintf(context->error, fmt, args);
-    va_end(args);
-
-    switch (showHelp) {
-        case HELP_TRUE:
-            show_help(context);
-            break;
-        case HELP_FORMAT:
-            show_format_help(context);
-            break;
-        case HELP_FALSE:
-        default:
-            break;
-    }
-
-    context->stop = true;
-}
-
 static char* parseTime(log_time& t, const char* cp) {
     char* ep = t.strptime(cp, "%m-%d %H:%M:%S.%q");
     if (ep) return ep;
@@ -713,32 +494,18 @@
     return retval;
 }
 
-const char* getenv(android_logcat_context_internal* context, const char* name) {
-    if (!context->envp || !name || !*name) return nullptr;
-
-    for (size_t len = strlen(name), i = 0; context->envp[i]; ++i) {
-        if (strncmp(context->envp[i], name, len)) continue;
-        if (context->envp[i][len] == '=') return &context->envp[i][len + 1];
-    }
-    return nullptr;
-}
-
-}  // namespace android
-
-void reportErrorName(const char** current, const char* name,
-                     bool blockSecurity) {
-    if (*current) return;
-    if (!blockSecurity || (android_name_to_log_id(name) != LOG_ID_SECURITY)) {
-        *current = name;
+void ReportErrorName(const std::string& name, bool allow_security,
+                     std::vector<std::string>* errors) {
+    if (allow_security || name != "security") {
+        errors->emplace_back(name);
     }
 }
 
-static int __logcat(android_logcat_context_internal* context) {
-    using namespace android;
-    int err;
+int Logcat::Run(int argc, char** argv) {
     bool hasSetLogFormat = false;
     bool clearLog = false;
-    bool allSelected = false;
+    bool security_buffer_selected =
+            false;  // Do not report errors on the security buffer unless it is explicitly named.
     bool getLogSize = false;
     bool getPruneList = false;
     bool printStatistics = false;
@@ -748,114 +515,15 @@
     const char* setId = nullptr;
     int mode = ANDROID_LOG_RDONLY;
     std::string forceFilters;
-    log_device_t* dev;
-    struct logger_list* logger_list;
     size_t tail_lines = 0;
     log_time tail_time(log_time::EPOCH);
     size_t pid = 0;
     bool got_t = false;
-
-    // object instantiations before goto's can happen
-    log_device_t unexpected("unexpected", false);
-    const char* openDeviceFail = nullptr;
-    const char* clearFail = nullptr;
-    const char* setSizeFail = nullptr;
-    const char* getSizeFail = nullptr;
-    int argc = context->argc;
-    char* const* argv = context->argv;
-
-    context->output = stdout;
-    context->error = stderr;
-
-    for (int i = 0; i < argc; ++i) {
-        // Simulate shell stderr redirect parsing
-        if ((argv[i][0] != '2') || (argv[i][1] != '>')) continue;
-
-        // Append to file not implemented, just open file
-        size_t skip = (argv[i][2] == '>') + 2;
-        if (!strcmp(&argv[i][skip], "/dev/null")) {
-            context->stderr_null = true;
-        } else if (!strcmp(&argv[i][skip], "&1")) {
-            context->stderr_stdout = true;
-        } else {
-            // stderr file redirections are not supported
-            fprintf(context->stderr_stdout ? stdout : stderr,
-                    "stderr redirection to file %s unsupported, skipping\n",
-                    &argv[i][skip]);
-        }
-        // Only the first one
-        break;
-    }
-
-    const char* filename = nullptr;
-    for (int i = 0; i < argc; ++i) {
-        // Simulate shell stdout redirect parsing
-        if (argv[i][0] != '>') continue;
-
-        // Append to file not implemented, just open file
-        filename = &argv[i][(argv[i][1] == '>') + 1];
-        // Only the first one
-        break;
-    }
-
-    // Deal with setting up file descriptors and FILE pointers
-    if (context->error_fd >= 0) {  // Is an error file descriptor supplied?
-        if (context->error_fd == context->output_fd) {
-            context->stderr_stdout = true;
-        } else if (context->stderr_null) {  // redirection told us to close it
-            close(context->error_fd);
-            context->error_fd = -1;
-        } else {  // All Ok, convert error to a FILE pointer
-            context->error = fdopen(context->error_fd, "web");
-            if (!context->error) {
-                context->retval = -errno;
-                fprintf(context->stderr_stdout ? stdout : stderr,
-                        "Failed to fdopen(error_fd=%d) %s\n", context->error_fd,
-                        strerror(errno));
-                goto exit;
-            }
-        }
-    }
-    if (context->output_fd >= 0) {  // Is an output file descriptor supplied?
-        if (filename) {  // redirect to file, close supplied file descriptor.
-            close(context->output_fd);
-            context->output_fd = -1;
-        } else {  // All Ok, convert output to a FILE pointer
-            context->output = fdopen(context->output_fd, "web");
-            if (!context->output) {
-                context->retval = -errno;
-                fprintf(context->stderr_stdout ? stdout : context->error,
-                        "Failed to fdopen(output_fd=%d) %s\n",
-                        context->output_fd, strerror(errno));
-                goto exit;
-            }
-        }
-    }
-    if (filename) {  // We supplied an output file redirected in command line
-        context->output = fopen(filename, "web");
-    }
-    // Deal with 2>&1
-    if (context->stderr_stdout) context->error = context->output;
-    // Deal with 2>/dev/null
-    if (context->stderr_null) {
-        context->error_fd = -1;
-        context->error = nullptr;
-    }
-    // Only happens if output=stdout or output=filename
-    if ((context->output_fd < 0) && context->output) {
-        context->output_fd = fileno(context->output);
-    }
-    // Only happens if error=stdout || error=stderr
-    if ((context->error_fd < 0) && context->error) {
-        context->error_fd = fileno(context->error);
-    }
-
-    context->logformat = android_log_format_new();
+    unsigned id_mask = 0;
 
     if (argc == 2 && !strcmp(argv[1], "--help")) {
-        show_help(context);
-        context->retval = EXIT_SUCCESS;
-        goto exit;
+        show_help();
+        return EXIT_SUCCESS;
     }
 
     // meant to catch comma-delimited values, but cast a wider
@@ -913,15 +581,12 @@
                 // only long options
                 if (long_options[option_index].name == pid_str) {
                     if (pid != 0) {
-                        logcat_panic(context, HELP_TRUE, "Only supports one PID argument.\n");
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "Only one --pid argument can be provided.");
                     }
 
-                    // ToDo: determine runtime PID_MAX?
-                    if (!getSizeTArg(optarg, &pid, 1)) {
-                        logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
-                        goto exit;
+                    if (!ParseUint(optarg, &pid) || pid < 1) {
+                        error(EXIT_FAILURE, 0, "%s %s out of range.",
+                              long_options[option_index].name, optarg);
                     }
                     break;
                 }
@@ -930,26 +595,23 @@
                             ANDROID_LOG_NONBLOCK;
                     // ToDo: implement API that supports setting a wrap timeout
                     size_t dummy = ANDROID_LOG_WRAP_DEFAULT_TIMEOUT;
-                    if (optarg && !getSizeTArg(optarg, &dummy, 1)) {
-                        logcat_panic(context, HELP_TRUE, "%s %s out of range\n",
-                                     long_options[option_index].name, optarg);
-                        goto exit;
+                    if (optarg && (!ParseUint(optarg, &dummy) || dummy < 1)) {
+                        error(EXIT_FAILURE, 0, "%s %s out of range.",
+                              long_options[option_index].name, optarg);
                     }
-                    if ((dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) &&
-                        context->error) {
-                        fprintf(context->error,
-                                "WARNING: %s %u seconds, ignoring %zu\n",
-                                long_options[option_index].name,
-                                ANDROID_LOG_WRAP_DEFAULT_TIMEOUT, dummy);
+                    if (dummy != ANDROID_LOG_WRAP_DEFAULT_TIMEOUT) {
+                        fprintf(stderr, "WARNING: %s %u seconds, ignoring %zu\n",
+                                long_options[option_index].name, ANDROID_LOG_WRAP_DEFAULT_TIMEOUT,
+                                dummy);
                     }
                     break;
                 }
                 if (long_options[option_index].name == print_str) {
-                    context->printItAnyways = true;
+                    print_it_anyways_ = true;
                     break;
                 }
                 if (long_options[option_index].name == debug_str) {
-                    context->debug = true;
+                    debug_ = true;
                     break;
                 }
                 if (long_options[option_index].name == id_str) {
@@ -959,7 +621,7 @@
 
             case 's':
                 // default to all silent
-                android_log_addFilterRule(context->logformat, "*:s");
+                android_log_addFilterRule(logformat_.get(), "*:s");
                 break;
 
             case 'c':
@@ -984,25 +646,18 @@
                 if (strspn(optarg, "0123456789") != strlen(optarg)) {
                     char* cp = parseTime(tail_time, optarg);
                     if (!cp) {
-                        logcat_panic(context, HELP_FALSE, "-%c \"%s\" not in time format\n", c,
-                                     optarg);
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "-%c '%s' not in time format.", c, optarg);
                     }
                     if (*cp) {
                         char ch = *cp;
                         *cp = '\0';
-                        if (context->error) {
-                            fprintf(context->error, "WARNING: -%c \"%s\"\"%c%s\" time truncated\n",
-                                    c, optarg, ch, cp + 1);
-                        }
+                        fprintf(stderr, "WARNING: -%c '%s' '%c%s' time truncated\n", c, optarg, ch,
+                                cp + 1);
                         *cp = ch;
                     }
                 } else {
-                    if (!getSizeTArg(optarg, &tail_lines, 1)) {
-                        if (context->error) {
-                            fprintf(context->error, "WARNING: -%c %s invalid, setting to 1\n", c,
-                                    optarg);
-                        }
+                    if (!ParseUint(optarg, &tail_lines) || tail_lines < 1) {
+                        fprintf(stderr, "WARNING: -%c %s invalid, setting to 1\n", c, optarg);
                         tail_lines = 1;
                     }
                 }
@@ -1013,14 +668,13 @@
                 break;
 
             case 'e':
-                context->regex.reset(new std::regex(optarg));
+                regex_.reset(new std::regex(optarg));
                 break;
 
             case 'm': {
-                if (!getSizeTArg(optarg, &context->maxCount)) {
-                    logcat_panic(context, HELP_FALSE,
-                                 "-%c \"%s\" isn't an integer greater than zero\n", c, optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &max_count_) || max_count_ < 1) {
+                    error(EXIT_FAILURE, 0, "-%c '%s' isn't an integer greater than zero.", c,
+                          optarg);
                 }
             } break;
 
@@ -1032,37 +686,8 @@
                 FALLTHROUGH_INTENDED;
 
             case 'G': {
-                char* cp;
-                if (strtoll(optarg, &cp, 0) > 0) {
-                    setLogSize = strtoll(optarg, &cp, 0);
-                } else {
-                    setLogSize = 0;
-                }
-
-                switch (*cp) {
-                    case 'g':
-                    case 'G':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case 'm':
-                    case 'M':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case 'k':
-                    case 'K':
-                        setLogSize *= 1024;
-                        FALLTHROUGH_INTENDED;
-                    case '\0':
-                        break;
-
-                    default:
-                        setLogSize = 0;
-                }
-
-                if (!setLogSize) {
-                    logcat_panic(context, HELP_FALSE,
-                                 "ERROR: -G <num><multiplier>\n");
-                    goto exit;
+                if (!ParseByteCount(optarg, &setLogSize) || setLogSize < 1) {
+                    error(EXIT_FAILURE, 0, "-G must be specified as <num><multiplier>.");
                 }
             } break;
 
@@ -1077,67 +702,28 @@
                 setPruneList = optarg;
                 break;
 
-            case 'b': {
-                std::unique_ptr<char, void (*)(void*)> buffers(strdup(optarg), free);
-                char* arg = buffers.get();
-                unsigned idMask = 0;
-                char* sv = nullptr;  // protect against -ENOMEM above
-                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                    if (!strcmp(arg, "default")) {
-                        idMask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) |
-                                  (1 << LOG_ID_CRASH);
-                    } else if (!strcmp(arg, "all")) {
-                        allSelected = true;
-                        idMask = (unsigned)-1;
+            case 'b':
+                for (const auto& buffer : Split(optarg, delimiters)) {
+                    if (buffer == "default") {
+                        id_mask |= (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH);
+                    } else if (buffer == "all") {
+                        id_mask = -1;
                     } else {
-                        log_id_t log_id = android_name_to_log_id(arg);
-                        const char* name = android_log_id_to_name(log_id);
-
-                        if (!!strcmp(name, arg)) {
-                            logcat_panic(context, HELP_TRUE,
-                                         "unknown buffer %s\n", arg);
-                            goto exit;
+                        log_id_t log_id = android_name_to_log_id(buffer.c_str());
+                        if (log_id >= LOG_ID_MAX) {
+                            error(EXIT_FAILURE, 0, "Unknown buffer '%s' listed for -b.",
+                                  buffer.c_str());
                         }
-                        if (log_id == LOG_ID_SECURITY) allSelected = false;
-                        idMask |= (1 << log_id);
-                    }
-                    arg = nullptr;
-                }
-
-                for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
-                    const char* name = android_log_id_to_name((log_id_t)i);
-                    log_id_t log_id = android_name_to_log_id(name);
-
-                    if (log_id != (log_id_t)i) continue;
-                    if (!(idMask & (1 << i))) continue;
-
-                    bool found = false;
-                    for (dev = context->devices; dev; dev = dev->next) {
-                        if (!strcmp(name, dev->device)) {
-                            found = true;
-                            break;
+                        if (log_id == LOG_ID_SECURITY) {
+                            security_buffer_selected = true;
                         }
-                        if (!dev->next) break;
+                        id_mask |= (1 << log_id);
                     }
-                    if (found) continue;
-
-                    bool binary = !strcmp(name, "events") ||
-                                  !strcmp(name, "security") ||
-                                  !strcmp(name, "stats");
-                    log_device_t* d = new log_device_t(name, binary);
-
-                    if (dev) {
-                        dev->next = d;
-                        dev = d;
-                    } else {
-                        context->devices = dev = d;
-                    }
-                    context->devCount++;
                 }
-            } break;
+                break;
 
             case 'B':
-                context->printBinary = 1;
+                print_binary_ = 1;
                 break;
 
             case 'f':
@@ -1145,43 +731,34 @@
                     tail_time = lastLogTime(optarg);
                 }
                 // redirect output to a file
-                context->outputFileName = optarg;
+                output_file_name_ = optarg;
                 break;
 
             case 'r':
-                if (!getSizeTArg(optarg, &context->logRotateSizeKBytes, 1)) {
-                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -r\n", optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &log_rotate_size_kb_) || log_rotate_size_kb_ < 1) {
+                    error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -r.", optarg);
                 }
                 break;
 
             case 'n':
-                if (!getSizeTArg(optarg, &context->maxRotatedLogs, 1)) {
-                    logcat_panic(context, HELP_TRUE, "Invalid parameter \"%s\" to -n\n", optarg);
-                    goto exit;
+                if (!ParseUint(optarg, &max_rotated_logs_) || max_rotated_logs_ < 1) {
+                    error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -n.", optarg);
                 }
                 break;
 
-            case 'v': {
+            case 'v':
                 if (!strcmp(optarg, "help") || !strcmp(optarg, "--help")) {
-                    show_format_help(context);
-                    context->retval = EXIT_SUCCESS;
-                    goto exit;
+                    show_format_help();
+                    return EXIT_SUCCESS;
                 }
-                std::unique_ptr<char, void (*)(void*)> formats(strdup(optarg), free);
-                char* arg = formats.get();
-                char* sv = nullptr;  // protect against -ENOMEM above
-                while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                    err = setLogFormat(context, arg);
+                for (const auto& arg : Split(optarg, delimiters)) {
+                    int err = SetLogFormat(arg.c_str());
                     if (err < 0) {
-                        logcat_panic(context, HELP_FORMAT,
-                                     "Invalid parameter \"%s\" to -v\n", arg);
-                        goto exit;
+                        error(EXIT_FAILURE, 0, "Invalid parameter '%s' to -v.", arg.c_str());
                     }
-                    arg = nullptr;
                     if (err) hasSetLogFormat = true;
                 }
-            } break;
+                break;
 
             case 'Q':
 #define LOGCAT_FILTER "androidboot.logcat="
@@ -1199,8 +776,7 @@
                 {
                     // if not in emulator, exit quietly
                     if (false == android::base::GetBoolProperty(QEMU_PROPERTY, false)) {
-                        context->retval = EXIT_SUCCESS;
-                        goto exit;
+                        return EXIT_SUCCESS;
                     }
 
                     std::string cmdline = android::base::GetProperty(QEMU_CMDLINE, "");
@@ -1211,8 +787,7 @@
                     const char* logcatFilter = strstr(cmdline.c_str(), LOGCAT_FILTER);
                     // if nothing found or invalid filters, exit quietly
                     if (!logcatFilter) {
-                        context->retval = EXIT_SUCCESS;
-                        goto exit;
+                        return EXIT_SUCCESS;
                     }
 
                     const char* p = logcatFilter + strlen(LOGCAT_FILTER);
@@ -1231,8 +806,7 @@
                     } else if (console) {
                         p = console + strlen(CONSOLE_OPTION);
                     } else {
-                        context->retval = EXIT_FAILURE;
-                        goto exit;
+                        return EXIT_FAILURE;
                     }
 
                     q = strpbrk(p, " \t\n\r");
@@ -1249,37 +823,26 @@
                             devname = devname.substr(0, pos);
                         }
                     }
-                    cmdline.erase();
 
-                    if (context->error) {
-                        fprintf(context->error, "logcat using %s\n",
-                                devname.c_str());
+                    fprintf(stderr, "logcat using %s\n", devname.c_str());
+
+                    int fd = open(devname.c_str(), O_WRONLY | O_CLOEXEC);
+                    if (fd < 0) {
+                        break;
                     }
 
-                    FILE* fp = fopen(devname.c_str(), "web");
-                    devname.erase();
-                    if (!fp) break;
-
                     if (consolePipe) {
                         // need the trailing '\0'
-                        if(!android::base::WriteFully(fileno(fp), pipePurpose.c_str(),
-                                    pipePurpose.size() + 1)) {
-                            fclose(fp);
-                            context->retval = EXIT_FAILURE;
-                            goto exit;
+                        if (!android::base::WriteFully(fd, pipePurpose.c_str(),
+                                                       pipePurpose.size() + 1)) {
+                            close(fd);
+                            return EXIT_FAILURE;
                         }
                     }
-
                     // close output and error channels, replace with console
-                    android::close_output(context);
-                    android::close_error(context);
-                    context->stderr_stdout = true;
-                    context->output = fp;
-                    context->output_fd = fileno(fp);
-                    if (context->stderr_null) break;
-                    context->stderr_stdout = true;
-                    context->error = fp;
-                    context->error_fd = fileno(fp);
+                    dup2(fd, output_fd_.get());
+                    dup2(fd, STDERR_FILENO);
+                    close(fd);
                 }
                 break;
 
@@ -1288,69 +851,53 @@
                 break;
 
             case ':':
-                logcat_panic(context, HELP_TRUE, "Option -%c needs an argument\n", optopt);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Option '%s' needs an argument.", argv[optind - 1]);
+                break;
 
             case 'h':
-                show_help(context);
-                show_format_help(context);
-                goto exit;
+                show_help();
+                show_format_help();
+                return EXIT_SUCCESS;
+
+            case '?':
+                error(EXIT_FAILURE, 0, "Unknown option '%s'.", argv[optind - 1]);
+                break;
 
             default:
-                logcat_panic(context, HELP_TRUE, "Unrecognized Option %c\n", optopt);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Unknown getopt_long() result '%c'.", c);
         }
     }
 
-    if (context->maxCount && got_t) {
-        logcat_panic(context, HELP_TRUE,
-                     "Cannot use -m (--max-count) and -t together\n");
-        goto exit;
+    if (max_count_ && got_t) {
+        error(EXIT_FAILURE, 0, "Cannot use -m (--max-count) and -t together.");
     }
-    if (context->printItAnyways && (!context->regex || !context->maxCount)) {
+    if (print_it_anyways_ && (!regex_ || !max_count_)) {
         // One day it would be nice if --print -v color and --regex <expr>
         // could play with each other and show regex highlighted content.
-        // clang-format off
-        if (context->error) {
-            fprintf(context->error, "WARNING: "
-                            "--print ignored, to be used in combination with\n"
-                                "         "
-                            "--regex <expr> and --max-count <N>\n");
-        }
-        context->printItAnyways = false;
+        fprintf(stderr,
+                "WARNING: "
+                "--print ignored, to be used in combination with\n"
+                "         "
+                "--regex <expr> and --max-count <N>\n");
+        print_it_anyways_ = false;
     }
 
-    if (!context->devices) {
-        dev = context->devices = new log_device_t("main", false);
-        context->devCount = 1;
-        if (android_name_to_log_id("system") == LOG_ID_SYSTEM) {
-            dev = dev->next = new log_device_t("system", false);
-            context->devCount++;
-        }
-        if (android_name_to_log_id("crash") == LOG_ID_CRASH) {
-            dev = dev->next = new log_device_t("crash", false);
-            context->devCount++;
-        }
-        if (android_name_to_log_id("kernel") == LOG_ID_KERNEL) {
-            dev = dev->next = new log_device_t("kernel", false);
-            context->devCount++;
-        }
+    // If no buffers are specified, default to using these buffers.
+    if (id_mask == 0) {
+        id_mask = (1 << LOG_ID_MAIN) | (1 << LOG_ID_SYSTEM) | (1 << LOG_ID_CRASH) |
+                  (1 << LOG_ID_KERNEL);
     }
 
-    if (!!context->logRotateSizeKBytes && !context->outputFileName) {
-        logcat_panic(context, HELP_TRUE, "-r requires -f as well\n");
-        goto exit;
+    if (log_rotate_size_kb_ != 0 && !output_file_name_) {
+        error(EXIT_FAILURE, 0, "-r requires -f as well.");
     }
 
-    if (!!setId) {
-        if (!context->outputFileName) {
-            logcat_panic(context, HELP_TRUE,
-                         "--id='%s' requires -f as well\n", setId);
-            goto exit;
+    if (setId != 0) {
+        if (!output_file_name_) {
+            error(EXIT_FAILURE, 0, "--id='%s' requires -f as well.", setId);
         }
 
-        std::string file_name = android::base::StringPrintf(
-                                        "%s.id", context->outputFileName);
+        std::string file_name = StringPrintf("%s.id", output_file_name_);
         std::string file;
         bool file_ok = android::base::ReadFileToString(file_name, &file);
         android::base::WriteStringToFile(setId, file_name, S_IRUSR | S_IWUSR,
@@ -1359,397 +906,264 @@
     }
 
     if (!hasSetLogFormat) {
-        const char* logFormat = android::getenv(context, "ANDROID_PRINTF_LOG");
+        const char* logFormat = getenv("ANDROID_PRINTF_LOG");
 
         if (!!logFormat) {
-            std::unique_ptr<char, void (*)(void*)> formats(strdup(logFormat),
-                                                           free);
-            char* sv = nullptr;  // protect against -ENOMEM above
-            char* arg = formats.get();
-            while (!!(arg = strtok_r(arg, delimiters, &sv))) {
-                err = setLogFormat(context, arg);
+            for (const auto& arg : Split(logFormat, delimiters)) {
+                int err = SetLogFormat(arg.c_str());
                 // environment should not cause crash of logcat
-                if ((err < 0) && context->error) {
-                    fprintf(context->error,
-                            "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg);
+                if (err < 0) {
+                    fprintf(stderr, "invalid format in ANDROID_PRINTF_LOG '%s'\n", arg.c_str());
                 }
-                arg = nullptr;
                 if (err > 0) hasSetLogFormat = true;
             }
         }
         if (!hasSetLogFormat) {
-            setLogFormat(context, "threadtime");
+            SetLogFormat("threadtime");
         }
     }
 
     if (forceFilters.size()) {
-        err = android_log_addFilterString(context->logformat,
-                                          forceFilters.c_str());
+        int err = android_log_addFilterString(logformat_.get(), forceFilters.c_str());
         if (err < 0) {
-            logcat_panic(context, HELP_FALSE,
-                         "Invalid filter expression in logcat args\n");
-            goto exit;
+            error(EXIT_FAILURE, 0, "Invalid filter expression in logcat args.");
         }
     } else if (argc == optind) {
         // Add from environment variable
-        const char* env_tags_orig = android::getenv(context, "ANDROID_LOG_TAGS");
+        const char* env_tags_orig = getenv("ANDROID_LOG_TAGS");
 
         if (!!env_tags_orig) {
-            err = android_log_addFilterString(context->logformat,
-                                              env_tags_orig);
+            int err = android_log_addFilterString(logformat_.get(), env_tags_orig);
 
             if (err < 0) {
-                logcat_panic(context, HELP_TRUE,
-                            "Invalid filter expression in ANDROID_LOG_TAGS\n");
-                goto exit;
+                error(EXIT_FAILURE, 0, "Invalid filter expression in ANDROID_LOG_TAGS.");
             }
         }
     } else {
         // Add from commandline
         for (int i = optind ; i < argc ; i++) {
-            // skip stderr redirections of _all_ kinds
-            if ((argv[i][0] == '2') && (argv[i][1] == '>')) continue;
-            // skip stdout redirections of _all_ kinds
-            if (argv[i][0] == '>') continue;
-
-            err = android_log_addFilterString(context->logformat, argv[i]);
+            int err = android_log_addFilterString(logformat_.get(), argv[i]);
             if (err < 0) {
-                logcat_panic(context, HELP_TRUE,
-                             "Invalid filter expression '%s'\n", argv[i]);
-                goto exit;
+                error(EXIT_FAILURE, 0, "Invalid filter expression '%s'.", argv[i]);
             }
         }
     }
 
-    dev = context->devices;
-    if (tail_time != log_time::EPOCH) {
-        logger_list = android_logger_list_alloc_time(mode, tail_time, pid);
-    } else {
-        logger_list = android_logger_list_alloc(mode, tail_lines, pid);
+    if (mode & ANDROID_LOG_PSTORE) {
+        if (output_file_name_) {
+            error(EXIT_FAILURE, 0, "-c is ambiguous with both -f and -L specified.");
+        }
+        if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
+            error(EXIT_FAILURE, 0, "-L is incompatible with -g/-G, -S, and -p/-P.");
+        }
+        if (clearLog) {
+            unlink("/sys/fs/pstore/pmsg-ramoops-0");
+            return EXIT_SUCCESS;
+        }
     }
-    // We have three orthogonal actions below to clear, set log size and
-    // get log size. All sharing the same iteration loop.
-    while (dev) {
-        dev->logger_list = logger_list;
-        dev->logger = android_logger_open(logger_list,
-                                          android_name_to_log_id(dev->device));
-        if (!dev->logger) {
-            reportErrorName(&openDeviceFail, dev->device, allSelected);
-            dev = dev->next;
-            continue;
+
+    if (output_file_name_) {
+        if (setLogSize || getLogSize || printStatistics || getPruneList || setPruneList) {
+            error(EXIT_FAILURE, 0, "-f is incompatible with -g/-G, -S, and -p/-P.");
         }
 
         if (clearLog || setId) {
-            if (context->outputFileName) {
-                int maxRotationCountDigits =
-                    (context->maxRotatedLogs > 0) ?
-                        (int)(floor(log10(context->maxRotatedLogs) + 1)) :
-                        0;
+            int max_rotation_count_digits =
+                    max_rotated_logs_ > 0 ? (int)(floor(log10(max_rotated_logs_) + 1)) : 0;
 
-                for (int i = context->maxRotatedLogs ; i >= 0 ; --i) {
-                    std::string file;
+            for (int i = max_rotated_logs_; i >= 0; --i) {
+                std::string file;
 
-                    if (!i) {
-                        file = android::base::StringPrintf(
-                            "%s", context->outputFileName);
-                    } else {
-                        file = android::base::StringPrintf("%s.%.*d",
-                            context->outputFileName, maxRotationCountDigits, i);
-                    }
-
-                    if (!file.length()) {
-                        perror("while clearing log files");
-                        reportErrorName(&clearFail, dev->device, allSelected);
-                        break;
-                    }
-
-                    err = unlink(file.c_str());
-
-                    if (err < 0 && errno != ENOENT && !clearFail) {
-                        perror("while clearing log files");
-                        reportErrorName(&clearFail, dev->device, allSelected);
-                    }
+                if (!i) {
+                    file = output_file_name_;
+                } else {
+                    file = StringPrintf("%s.%.*d", output_file_name_, max_rotation_count_digits, i);
                 }
-            } else if (android_logger_clear(dev->logger)) {
-                reportErrorName(&clearFail, dev->device, allSelected);
+
+                int err = unlink(file.c_str());
+
+                if (err < 0 && errno != ENOENT) {
+                    fprintf(stderr, "failed to delete log file '%s': %s\n", file.c_str(),
+                            strerror(errno));
+                }
+            }
+        }
+
+        if (clearLog) {
+            return EXIT_SUCCESS;
+        }
+    }
+
+    std::unique_ptr<logger_list, decltype(&android_logger_list_free)> logger_list{
+            nullptr, &android_logger_list_free};
+    if (tail_time != log_time::EPOCH) {
+        logger_list.reset(android_logger_list_alloc_time(mode, tail_time, pid));
+    } else {
+        logger_list.reset(android_logger_list_alloc(mode, tail_lines, pid));
+    }
+    // We have three orthogonal actions below to clear, set log size and
+    // get log size. All sharing the same iteration loop.
+    std::vector<std::string> open_device_failures;
+    std::vector<std::string> clear_failures;
+    std::vector<std::string> set_size_failures;
+    std::vector<std::string> get_size_failures;
+
+    for (int i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) {
+        if (!(id_mask & (1 << i))) continue;
+        const char* buffer_name = android_log_id_to_name(static_cast<log_id_t>(i));
+
+        auto logger = android_logger_open(logger_list.get(), static_cast<log_id_t>(i));
+        if (logger == nullptr) {
+            ReportErrorName(buffer_name, security_buffer_selected, &open_device_failures);
+            continue;
+        }
+
+        if (clearLog) {
+            if (android_logger_clear(logger)) {
+                ReportErrorName(buffer_name, security_buffer_selected, &clear_failures);
             }
         }
 
         if (setLogSize) {
-            if (android_logger_set_log_size(dev->logger, setLogSize)) {
-                reportErrorName(&setSizeFail, dev->device, allSelected);
+            if (android_logger_set_log_size(logger, setLogSize)) {
+                ReportErrorName(buffer_name, security_buffer_selected, &set_size_failures);
             }
         }
 
         if (getLogSize) {
-            long size = android_logger_get_log_size(dev->logger);
-            long readable = android_logger_get_log_readable_size(dev->logger);
+            long size = android_logger_get_log_size(logger);
+            long readable = android_logger_get_log_readable_size(logger);
 
-            if ((size < 0) || (readable < 0)) {
-                reportErrorName(&getSizeFail, dev->device, allSelected);
+            if (size < 0 || readable < 0) {
+                ReportErrorName(buffer_name, security_buffer_selected, &get_size_failures);
             } else {
                 auto size_format = format_of_size(size);
                 auto readable_format = format_of_size(readable);
                 std::string str = android::base::StringPrintf(
-                       "%s: ring buffer is %lu %sB (%lu %sB consumed),"
-                         " max entry is %d B, max payload is %d B\n",
-                       dev->device,
-                       size_format.first, size_format.second,
-                       readable_format.first, readable_format.second,
-                       (int)LOGGER_ENTRY_MAX_LEN,
-                       (int)LOGGER_ENTRY_MAX_PAYLOAD);
-                TEMP_FAILURE_RETRY(write(context->output_fd,
-                                         str.data(), str.length()));
+                        "%s: ring buffer is %lu %sB (%lu %sB consumed),"
+                        " max entry is %d B, max payload is %d B\n",
+                        buffer_name, size_format.first, size_format.second, readable_format.first,
+                        readable_format.second, (int)LOGGER_ENTRY_MAX_LEN,
+                        (int)LOGGER_ENTRY_MAX_PAYLOAD);
+                TEMP_FAILURE_RETRY(write(output_fd_.get(), str.data(), str.length()));
             }
         }
-
-        dev = dev->next;
     }
 
-    context->retval = EXIT_SUCCESS;
-
     // report any errors in the above loop and exit
-    if (openDeviceFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "Unable to open log device '%s'\n", openDeviceFail);
-        goto close;
+    if (!open_device_failures.empty()) {
+        error(EXIT_FAILURE, 0, "Unable to open log device%s '%s'.",
+              open_device_failures.size() > 1 ? "s" : "", Join(open_device_failures, ",").c_str());
     }
-    if (clearFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to clear the '%s' log\n", clearFail);
-        goto close;
+    if (!clear_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to clear the '%s' log%s.", Join(clear_failures, ",").c_str(),
+              clear_failures.size() > 1 ? "s" : "");
     }
-    if (setSizeFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to set the '%s' log size\n", setSizeFail);
-        goto close;
+    if (!set_size_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to set the '%s' log size%s.",
+              Join(set_size_failures, ",").c_str(), set_size_failures.size() > 1 ? "s" : "");
     }
-    if (getSizeFail) {
-        logcat_panic(context, HELP_FALSE,
-                     "failed to get the readable '%s' log size", getSizeFail);
-        goto close;
+    if (!get_size_failures.empty()) {
+        error(EXIT_FAILURE, 0, "failed to get the readable '%s' log size%s.",
+              Join(get_size_failures, ",").c_str(), get_size_failures.size() > 1 ? "s" : "");
     }
 
     if (setPruneList) {
         size_t len = strlen(setPruneList);
-        // extra 32 bytes are needed by android_logger_set_prune_list
-        size_t bLen = len + 32;
-        char* buf = nullptr;
-        if (asprintf(&buf, "%-*s", (int)(bLen - 1), setPruneList) > 0) {
-            buf[len] = '\0';
-            if (android_logger_set_prune_list(logger_list, buf, bLen)) {
-                logcat_panic(context, HELP_FALSE,
-                             "failed to set the prune list");
-            }
-            free(buf);
-        } else {
-            logcat_panic(context, HELP_FALSE,
-                         "failed to set the prune list (alloc)");
+        if (android_logger_set_prune_list(logger_list.get(), setPruneList, len)) {
+            error(EXIT_FAILURE, 0, "Failed to set the prune list.");
         }
-        goto close;
+        return EXIT_SUCCESS;
     }
 
     if (printStatistics || getPruneList) {
-        size_t len = 8192;
-        char* buf;
+        std::string buf(8192, '\0');
+        size_t ret_length = 0;
+        int retry = 32;
 
-        for (int retry = 32; (retry >= 0) && ((buf = new char[len]));
-             delete[] buf, buf = nullptr, --retry) {
+        for (; retry >= 0; --retry) {
             if (getPruneList) {
-                android_logger_get_prune_list(logger_list, buf, len);
+                android_logger_get_prune_list(logger_list.get(), buf.data(), buf.size());
             } else {
-                android_logger_get_statistics(logger_list, buf, len);
+                android_logger_get_statistics(logger_list.get(), buf.data(), buf.size());
             }
-            buf[len - 1] = '\0';
-            if (atol(buf) < 3) {
-                delete[] buf;
-                buf = nullptr;
+
+            ret_length = atol(buf.c_str());
+            if (ret_length < 3) {
+                error(EXIT_FAILURE, 0, "Failed to read data.");
+            }
+
+            if (ret_length < buf.size()) {
                 break;
             }
-            size_t ret = atol(buf) + 1;
-            if (ret <= len) {
-                len = ret;
-                break;
-            }
-            len = ret;
+
+            buf.resize(ret_length + 1);
         }
 
-        if (!buf) {
-            logcat_panic(context, HELP_FALSE, "failed to read data");
-            goto close;
+        if (retry < 0) {
+            error(EXIT_FAILURE, 0, "Failed to read data.");
         }
 
-        // remove trailing FF
-        char* cp = buf + len - 1;
-        *cp = '\0';
-        bool truncated = *--cp != '\f';
-        if (!truncated) *cp = '\0';
-
-        // squash out the byte count
-        cp = buf;
-        if (!truncated) {
-            while (isdigit(*cp)) ++cp;
-            if (*cp == '\n') ++cp;
+        buf.resize(ret_length);
+        if (buf.back() == '\f') {
+            buf.pop_back();
         }
 
-        len = strlen(cp);
-        TEMP_FAILURE_RETRY(write(context->output_fd, cp, len));
-        delete[] buf;
-        goto close;
+        // Remove the byte count prefix
+        const char* cp = buf.c_str();
+        while (isdigit(*cp)) ++cp;
+        if (*cp == '\n') ++cp;
+
+        size_t len = strlen(cp);
+        TEMP_FAILURE_RETRY(write(output_fd_.get(), cp, len));
+        return EXIT_SUCCESS;
     }
 
-    if (getLogSize || setLogSize || clearLog) goto close;
+    if (getLogSize || setLogSize || clearLog) return EXIT_SUCCESS;
 
-    setupOutputAndSchedulingPolicy(context, !(mode & ANDROID_LOG_NONBLOCK));
-    if (context->stop) goto close;
+    SetupOutputAndSchedulingPolicy(!(mode & ANDROID_LOG_NONBLOCK));
 
-    // LOG_EVENT_INT(10, 12345);
-    // LOG_EVENT_LONG(11, 0x1122334455667788LL);
-    // LOG_EVENT_STRING(0, "whassup, doc?");
-
-    dev = nullptr;
-
-    while (!context->stop &&
-           (!context->maxCount || (context->printCount < context->maxCount))) {
+    while (!max_count_ || print_count_ < max_count_) {
         struct log_msg log_msg;
-        int ret = android_logger_list_read(logger_list, &log_msg);
+        int ret = android_logger_list_read(logger_list.get(), &log_msg);
         if (!ret) {
-            logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
-            break;
+            error(EXIT_FAILURE, 0, R"init(Unexpected EOF!
+
+This means that either logd crashed, or more likely, this instance of logcat was unable to read log
+messages as quickly as they were being produced.
+
+If you have enabled significant logging, look into using the -G option to increase log buffer sizes.)init");
         }
 
         if (ret < 0) {
             if (ret == -EAGAIN) break;
 
             if (ret == -EIO) {
-                logcat_panic(context, HELP_FALSE, "read: unexpected EOF!\n");
-                break;
+                error(EXIT_FAILURE, 0, "Unexpected EOF!");
             }
             if (ret == -EINVAL) {
-                logcat_panic(context, HELP_FALSE, "read: unexpected length.\n");
-                break;
+                error(EXIT_FAILURE, 0, "Unexpected length.");
             }
-            logcat_panic(context, HELP_FALSE, "logcat read failure\n");
-            break;
+            error(EXIT_FAILURE, errno, "Logcat read failure");
         }
 
-        log_device_t* d;
-        for (d = context->devices; d; d = d->next) {
-            if (android_name_to_log_id(d->device) == log_msg.id()) break;
-        }
-        if (!d) {
-            context->devCount = 2; // set to Multiple
-            d = &unexpected;
-            d->binary = log_msg.id() == LOG_ID_EVENTS;
+        if (log_msg.id() > LOG_ID_MAX) {
+            error(EXIT_FAILURE, 0, "Unexpected log id (%d) over LOG_ID_MAX (%d).", log_msg.id(),
+                  LOG_ID_MAX);
         }
 
-        if (dev != d) {
-            dev = d;
-            maybePrintStart(context, dev, printDividers);
-            if (context->stop) break;
-        }
-        if (context->printBinary) {
-            printBinary(context, &log_msg);
+        PrintDividers(log_msg.id(), printDividers);
+
+        if (print_binary_) {
+            TEMP_FAILURE_RETRY(write(output_fd_.get(), &log_msg, log_msg.len()));
         } else {
-            processBuffer(context, dev, &log_msg);
+            ProcessBuffer(&log_msg);
         }
     }
-
-close:
-    // Short and sweet. Implemented generic version in android_logcat_destroy.
-    while (!!(dev = context->devices)) {
-        context->devices = dev->next;
-        delete dev;
-    }
-    android_logger_list_free(logger_list);
-
-exit:
-    // close write end of pipe to help things along
-    if (context->output_fd == context->fds[1]) {
-        android::close_output(context);
-    }
-    if (context->error_fd == context->fds[1]) {
-        android::close_error(context);
-    }
-    if (context->fds[1] >= 0) {
-        // NB: should be closed by the above
-        int save_errno = errno;
-        close(context->fds[1]);
-        errno = save_errno;
-        context->fds[1] = -1;
-    }
-    context->thread_stopped = true;
-    return context->retval;
+    return EXIT_SUCCESS;
 }
 
-// Can block
-int android_logcat_run_command(android_logcat_context ctx,
-                               int output, int error,
-                               int argc, char* const* argv,
-                               char* const* envp) {
-    android_logcat_context_internal* context = ctx;
-
-    context->output_fd = output;
-    context->error_fd = error;
-    context->argc = argc;
-    context->argv = argv;
-    context->envp = envp;
-    context->stop = false;
-    context->thread_stopped = false;
-    return __logcat(context);
-}
-
-// Finished with context
-int android_logcat_destroy(android_logcat_context* ctx) {
-    android_logcat_context_internal* context = *ctx;
-
-    if (!context) return -EBADF;
-
-    *ctx = nullptr;
-
-    context->stop = true;
-
-    while (context->thread_stopped == false) {
-        // Makes me sad, replace thread_stopped with semaphore.  Short lived.
-        sched_yield();
-    }
-
-    context->argv_hold.clear();
-    context->args.clear();
-    context->envp_hold.clear();
-    context->envs.clear();
-    if (context->fds[0] >= 0) {
-        close(context->fds[0]);
-        context->fds[0] = -1;
-    }
-    android::close_output(context);
-    android::close_error(context);
-
-    if (context->fds[1] >= 0) {
-        // NB: this should be closed by close_output, but just in case...
-        close(context->fds[1]);
-        context->fds[1] = -1;
-    }
-
-    android_closeEventTagMap(context->eventTagMap);
-
-    // generic cleanup of devices list to handle all possible dirty cases
-    log_device_t* dev;
-    while (!!(dev = context->devices)) {
-        struct logger_list* logger_list = dev->logger_list;
-        if (logger_list) {
-            for (log_device_t* d = dev; d; d = d->next) {
-                if (d->logger_list == logger_list) d->logger_list = nullptr;
-            }
-            android_logger_list_free(logger_list);
-        }
-        context->devices = dev->next;
-        delete dev;
-    }
-
-    int retval = context->retval;
-
-    free(context);
-
-    return retval;
+int main(int argc, char** argv) {
+    Logcat logcat;
+    return logcat.Run(argc, argv);
 }
diff --git a/logcat/logcat.h b/logcat/logcat.h
deleted file mode 100644
index 85ed7da..0000000
--- a/logcat/logcat.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (C) 2005-2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <stdio.h>
-
-/*
- * The opaque context
- */
-typedef struct android_logcat_context_internal* android_logcat_context;
-
-/* Creates a context associated with this logcat instance
- *
- * Returns a pointer to the context, or a NULL on error.
- */
-android_logcat_context create_android_logcat();
-
-/* Collects and outputs the logcat data to output and error file descriptors
- *
- * Will block, performed in-thread and in-process
- *
- * The output file descriptor variable, if greater than or equal to 0, is
- * where the output (ie: stdout) will be sent. The file descriptor is closed
- * on android_logcat_destroy which terminates the instance, or when an -f flag
- * (output redirect to a file) is present in the command.  The error file
- * descriptor variable, if greater than or equal to 0, is where the error
- * stream (ie: stderr) will be sent, also closed on android_logcat_destroy.
- * The error file descriptor can be set to equal to the output file descriptor,
- * which will mix output and error stream content, and will defer closure of
- * the file descriptor on -f flag redirection.  Negative values for the file
- * descriptors will use stdout and stderr FILE references respectively
- * internally, and will not close the references as noted above.
- *
- * Return value is 0 for success, non-zero for errors.
- */
-int android_logcat_run_command(android_logcat_context ctx, int output, int error, int argc,
-                               char* const* argv, char* const* envp);
-
-/* Finished with context
- *
- * Kill the command thread ASAP (if any), and free up all associated resources.
- *
- * Return value is the result of the android_logcat_run_command, or
- * non-zero for any errors.
- */
-int android_logcat_destroy(android_logcat_context* ctx);
diff --git a/logcat/logcat_main.cpp b/logcat/logcat_main.cpp
deleted file mode 100644
index ecfa2ba..0000000
--- a/logcat/logcat_main.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <stdlib.h>
-
-#include "logcat.h"
-
-int main(int argc, char** argv, char** envp) {
-    android_logcat_context ctx = create_android_logcat();
-    if (!ctx) return -1;
-    signal(SIGPIPE, exit);
-    int retval = android_logcat_run_command(ctx, -1, -1, argc, argv, envp);
-    int ret = android_logcat_destroy(&ctx);
-    if (!ret) ret = retval;
-    return ret;
-}
diff --git a/logcat/logcatd b/logcat/logcatd
new file mode 100755
index 0000000..5a1415d
--- /dev/null
+++ b/logcat/logcatd
@@ -0,0 +1,29 @@
+#! /system/bin/sh
+
+# This is primarily meant to be used by logpersist.  This script is run as an init service, which
+# first reads the 'last' logcat to persistent storage with `-L` then run logcat again without
+# `-L` to read the current logcat buffers to persistent storage.
+
+# init sets the umask to 077 for forked processes. logpersist needs to create files that are group
+# readable. So relax the umask to only disallow group wx and world rwx.
+umask 037
+
+has_last="false"
+for arg in "$@"; do
+  if [ "$arg" == "-L" -o "$arg" == "--last" ]; then
+    has_last="true"
+  fi
+done
+
+if [ "$has_last" == "true" ]; then
+  logcat "$@"
+fi
+
+args_without_last=()
+for arg in "$@"; do
+  if [ "$arg" != "-L" -a "$arg" != "--last" ]; then
+    ARGS+=("$arg")
+  fi
+done
+
+exec logcat "${ARGS[@]}"
diff --git a/logcat/logcatd.rc b/logcat/logcatd.rc
index e986184..64d5500 100644
--- a/logcat/logcatd.rc
+++ b/logcat/logcatd.rc
@@ -30,8 +30,8 @@
     setprop logd.logpersistd.enable true
 
 on property:logd.logpersistd.enable=true && property:logd.logpersistd=logcatd
-    # all exec/services are called with umask(077), so no gain beyond 0700
-    mkdir /data/misc/logd 0700 logd log
+    # log group should be able to read persisted logs
+    mkdir /data/misc/logd 0750 logd log
     start logcatd
 
 # stop logcatd service and clear data
diff --git a/logcat/logcatd_main.cpp b/logcat/logcatd_main.cpp
deleted file mode 100644
index c131846..0000000
--- a/logcat/logcatd_main.cpp
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <string>
-#include <vector>
-
-#include "logcat.h"
-
-int main(int argc, char** argv, char** envp) {
-    android_logcat_context ctx = create_android_logcat();
-    if (!ctx) return -1;
-
-    signal(SIGPIPE, exit);
-
-    // Save and detect presence of -L or --last flag
-    std::vector<std::string> args;
-    bool last = false;
-    for (int i = 0; i < argc; ++i) {
-        if (!argv[i]) continue;
-        args.push_back(std::string(argv[i]));
-        if (!strcmp(argv[i], "-L") || !strcmp(argv[i], "--last")) last = true;
-    }
-
-    // Generate argv from saved content
-    std::vector<const char*> argv_hold;
-    for (auto& str : args) argv_hold.push_back(str.c_str());
-    argv_hold.push_back(nullptr);
-
-    int ret = 0;
-    if (last) {
-        // Run logcat command with -L flag
-        ret = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
-                                         (char* const*)&argv_hold[0], envp);
-        // Remove -L and --last flags from argument list
-        for (std::vector<const char*>::iterator it = argv_hold.begin();
-             it != argv_hold.end();) {
-            if (!*it || (strcmp(*it, "-L") && strcmp(*it, "--last"))) {
-                ++it;
-            } else {
-                it = argv_hold.erase(it);
-            }
-        }
-        // fall through to re-run the command regardless of the arguments
-        // passed in.  For instance, we expect -h to report help stutter.
-    }
-
-    // Run logcat command without -L flag
-    int retval = android_logcat_run_command(ctx, -1, -1, argv_hold.size() - 1,
-                                            (char* const*)&argv_hold[0], envp);
-    if (!ret) ret = retval;
-    retval = android_logcat_destroy(&ctx);
-    if (!ret) ret = retval;
-    return ret;
-}
diff --git a/logcat/logpersist b/logcat/logpersist
index c09b6b2..05b46f0 100755
--- a/logcat/logpersist
+++ b/logcat/logpersist
@@ -148,9 +148,9 @@
     echo "WARNING: Can not use --size or --buffer with ${progname%.*}.stop" >&2
   fi
   if [ "true" = "${clear}" ]; then
-    setprop ${property} "clear"
+    setprop ${property#persist.} "clear"
   else
-    setprop ${property} "stop"
+    setprop ${property#persist.} "stop"
   fi
   if [ -n "`getprop ${property#persist.}.buffer`" ]; then
     setprop ${property}.buffer ""
diff --git a/logd/CommandListener.cpp b/logd/CommandListener.cpp
index 7a843d8..694b5fa 100644
--- a/logd/CommandListener.cpp
+++ b/logd/CommandListener.cpp
@@ -19,6 +19,7 @@
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <math.h>
 #include <netinet/in.h>
 #include <stdlib.h>
 #include <string.h>
@@ -186,14 +187,26 @@
     : LogCommand("getStatistics"), mBuf(*buf) {
 }
 
-static std::string package_string(const std::string& str) {
-    // Calculate total buffer size prefix, count is the string length w/o nul
-    char fmt[32];
-    for (size_t l = str.length(), y = 0, x = 6; y != x;
-         y = x, x = strlen(fmt) - 2) {
-        snprintf(fmt, sizeof(fmt), "%zu\n%%s\n\f", l + x);
+// This returns a string with a length prefix with the format <length>\n<data>\n\f.  The length
+// prefix includes the length of the prefix itself.
+static std::string PackageString(const std::string& str) {
+    size_t overhead_length = 3;  // \n \n \f.
+
+    // Number of digits needed to represent length(str + overhead_length).
+    size_t str_size_digits = 1 + static_cast<size_t>(log10(str.size() + overhead_length));
+    // Number of digits needed to represent the total size.
+    size_t total_size_digits =
+            1 + static_cast<size_t>(log10(str.size() + overhead_length + str_size_digits));
+
+    // If adding the size prefix causes a new digit to be required to represent the new total
+    // size, add it to the 'overhead_length'.  This can only happen once, since each new digit
+    // allows for 10x the previous size to be recorded.
+    if (total_size_digits != str_size_digits) {
+        overhead_length++;
     }
-    return android::base::StringPrintf(fmt, str.c_str());
+
+    size_t total_size = str.size() + overhead_length + str_size_digits;
+    return android::base::StringPrintf("%zu\n%s\n\f", total_size, str.c_str());
 }
 
 int CommandListener::GetStatisticsCmd::runCommand(SocketClient* cli, int argc,
@@ -228,8 +241,7 @@
         }
     }
 
-    cli->sendMsg(
-        package_string(mBuf.formatStatistics(uid, pid, logMask)).c_str());
+    cli->sendMsg(PackageString(mBuf.formatStatistics(uid, pid, logMask)).c_str());
     return 0;
 }
 
@@ -240,7 +252,7 @@
 int CommandListener::GetPruneListCmd::runCommand(SocketClient* cli,
                                                  int /*argc*/, char** /*argv*/) {
     setname();
-    cli->sendMsg(package_string(mBuf.formatPrune()).c_str());
+    cli->sendMsg(PackageString(mBuf.formatPrune()).c_str());
     return 0;
 }
 
@@ -316,12 +328,11 @@
             cli->sendMsg("can not mix id= with either format= or name=");
             return 0;
         }
-        cli->sendMsg(package_string(mBuf.formatEntry(atoi(id), uid)).c_str());
+        cli->sendMsg(PackageString(mBuf.formatEntry(atoi(id), uid)).c_str());
         return 0;
     }
 
-    cli->sendMsg(
-        package_string(mBuf.formatGetEventTag(uid, name, format)).c_str());
+    cli->sendMsg(PackageString(mBuf.formatGetEventTag(uid, name, format)).c_str());
 
     return 0;
 }
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index ba05a06..834b20b 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -638,6 +638,8 @@
     if (stats.sizes(id) > (2 * log_buffer_size(id))) {  // +100%
         // A misbehaving or slow reader has its connection
         // dropped if we hit too much memory pressure.
+        android::prdebug("Kicking blocked reader, pid %d, from LogBuffer::kickMe()\n",
+                         me->mClient->getPid());
         me->release_Locked();
     } else if (me->mTimeout.tv_sec || me->mTimeout.tv_nsec) {
         // Allow a blocked WRAP timeout reader to
@@ -645,6 +647,9 @@
         me->triggerReader_Locked();
     } else {
         // tell slow reader to skip entries to catch up
+        android::prdebug(
+                "Skipping %lu entries from slow reader, pid %d, from LogBuffer::kickMe()\n",
+                pruneRows, me->mClient->getPid());
         me->triggerSkip_Locked(id, pruneRows);
     }
 }
@@ -1051,6 +1056,9 @@
                     LogTimeEntry* entry = times->get();
                     // Killer punch
                     if (entry->isWatching(id)) {
+                        android::prdebug(
+                                "Kicking blocked reader, pid %d, from LogBuffer::clear()\n",
+                                entry->mClient->getPid());
                         entry->release_Locked();
                     }
                     times++;
diff --git a/logd/LogBufferElement.cpp b/logd/LogBufferElement.cpp
index 5c43e18..ec81933 100644
--- a/logd/LogBufferElement.cpp
+++ b/logd/LogBufferElement.cpp
@@ -245,9 +245,9 @@
 }
 
 log_time LogBufferElement::flushTo(SocketClient* reader, LogBuffer* parent, bool lastSame) {
-    struct logger_entry_v4 entry = {};
+    struct logger_entry entry = {};
 
-    entry.hdr_size = sizeof(struct logger_entry_v4);
+    entry.hdr_size = sizeof(struct logger_entry);
     entry.lid = mLogId;
     entry.pid = mPid;
     entry.tid = mTid;
diff --git a/logd/LogListener.cpp b/logd/LogListener.cpp
index 443570f..ba61042 100644
--- a/logd/LogListener.cpp
+++ b/logd/LogListener.cpp
@@ -41,8 +41,7 @@
     }
 
     // + 1 to ensure null terminator if MAX_PAYLOAD buffer is received
-    char buffer[sizeof_log_id_t + sizeof(uint16_t) + sizeof(log_time) +
-                LOGGER_ENTRY_MAX_PAYLOAD + 1];
+    char buffer[sizeof(android_log_header_t) + LOGGER_ENTRY_MAX_PAYLOAD + 1];
     struct iovec iov = { buffer, sizeof(buffer) - 1 };
 
     alignas(4) char control[CMSG_SPACE(sizeof(struct ucred))];
diff --git a/logd/LogTags.cpp b/logd/LogTags.cpp
index f19e7b0..0cc7886 100644
--- a/logd/LogTags.cpp
+++ b/logd/LogTags.cpp
@@ -311,9 +311,7 @@
         if (log_msg.entry.len <= sizeof(uint32_t)) continue;
         uint32_t Tag = get4LE(msg);
         if (Tag != TAG_DEF_LOG_TAG) continue;
-        uid_t uid = (log_msg.entry.hdr_size >= sizeof(logger_entry_v4))
-                        ? log_msg.entry.uid
-                        : AID_ROOT;
+        uid_t uid = log_msg.entry.uid;
 
         std::string Name;
         std::string Format;
diff --git a/adb/daemon/set_verity_enable_state_service.h b/logd/fuzz/Android.bp
similarity index 62%
copy from adb/daemon/set_verity_enable_state_service.h
copy to logd/fuzz/Android.bp
index c0ed98e..299242d 100644
--- a/adb/daemon/set_verity_enable_state_service.h
+++ b/logd/fuzz/Android.bp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,11 +13,18 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-#pragma once
-
-#include "adb_unique_fd.h"
-
-#if defined(__ANDROID__)
-void set_verity_enabled_state_service(unique_fd fd, bool enable);
-#endif
+cc_fuzz {
+    name: "log_buffer_log_fuzzer",
+    srcs: [
+        "log_buffer_log_fuzzer.cpp",
+    ],
+    static_libs: [
+        "libbase",
+        "libcutils",
+        "libselinux",
+        "liblog",
+        "liblogd",
+        "libcutils",
+    ],
+    cflags: ["-Werror"],
+}
diff --git a/logd/fuzz/log_buffer_log_fuzzer.cpp b/logd/fuzz/log_buffer_log_fuzzer.cpp
new file mode 100644
index 0000000..4d1589b
--- /dev/null
+++ b/logd/fuzz/log_buffer_log_fuzzer.cpp
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <string>
+
+#include "../LogBuffer.h"
+#include "../LogTimes.h"
+
+// We don't want to waste a lot of entropy on messages
+#define MAX_MSG_LENGTH 5
+
+// Tag IDs usually start at 1000, we only want to try 1000 through 1009
+#define MIN_TAG_ID 1000
+#define TAG_MOD 10
+
+namespace android {
+struct LogInput {
+  public:
+    log_id_t log_id;
+    log_time realtime;
+    uid_t uid;
+    pid_t pid;
+    pid_t tid;
+    unsigned int log_mask;
+};
+
+int write_log_messages(const uint8_t** pdata, size_t* data_left, LogBuffer* log_buffer) {
+    const uint8_t* data = *pdata;
+    const LogInput* logInput = reinterpret_cast<const LogInput*>(data);
+    data += sizeof(LogInput);
+    *data_left -= sizeof(LogInput);
+
+    uint32_t tag = MIN_TAG_ID + data[0] % TAG_MOD;
+    uint8_t msg_length = data[1] % MAX_MSG_LENGTH;
+    if (msg_length < 2) {
+        // Not enough data for message
+        return 0;
+    }
+
+    data += 2 * sizeof(uint8_t);
+    *data_left -= 2 * sizeof(uint8_t);
+
+    if (*data_left < msg_length) {
+        // Not enough data for tag and message
+        *pdata = data;
+        return 0;
+    }
+
+    // We need nullterm'd strings
+    char msg[sizeof(uint32_t) + MAX_MSG_LENGTH + sizeof(char)];
+    char* msg_only = msg + sizeof(uint32_t);
+    memcpy(msg, &tag, sizeof(uint32_t));
+    memcpy(msg_only, data, msg_length);
+    msg_only[msg_length] = '\0';
+    data += msg_length;
+    *data_left -= msg_length;
+
+    // Other elements not in enum.
+    log_id_t log_id = static_cast<log_id_t>(unsigned(logInput->log_id) % (LOG_ID_MAX + 1));
+    log_buffer->log(log_id, logInput->realtime, logInput->uid, logInput->pid, logInput->tid, msg,
+                    sizeof(uint32_t) + msg_length + 1);
+    log_buffer->formatStatistics(logInput->uid, logInput->pid, logInput->log_mask);
+    *pdata = data;
+    return 1;
+}
+
+// Because system/core/logd/main.cpp redefines these.
+void prdebug(char const* fmt, ...) {
+    va_list ap;
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+}
+char* uidToName(uid_t) {
+    return strdup("fake");
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+    // We want a random tag length and a random remaining message length
+    if (data == nullptr || size < sizeof(LogInput) + 2 * sizeof(uint8_t)) {
+        return 0;
+    }
+
+    LastLogTimes times;
+    LogBuffer log_buffer(&times);
+    size_t data_left = size;
+    const uint8_t** pdata = &data;
+
+    log_buffer.enableStatistics();
+    log_buffer.initPrune(nullptr);
+    // We want to get pruning code to get called.
+    log_id_for_each(i) { log_buffer.setSize(i, 10000); }
+
+    while (data_left >= sizeof(LogInput) + 2 * sizeof(uint8_t)) {
+        if (!write_log_messages(pdata, &data_left, &log_buffer)) {
+            return 0;
+        }
+    }
+
+    log_id_for_each(i) { log_buffer.clear(i); }
+    return 0;
+}
+}  // namespace android
diff --git a/logd/logtagd.rc b/logd/logtagd.rc
index 46aa8c1..248a78c 100644
--- a/logd/logtagd.rc
+++ b/logd/logtagd.rc
@@ -2,7 +2,7 @@
 # logtagd event log tag service (debug only)
 #
 on post-fs-data
-    mkdir /data/misc/logd 0700 logd log
+    mkdir /data/misc/logd 0750 logd log
     write /data/misc/logd/event-log-tags ""
     chown logd log /data/misc/logd/event-log-tags
     chmod 0600 /data/misc/logd/event-log-tags
diff --git a/logd/tests/AndroidTest.xml b/logd/tests/AndroidTest.xml
index 9a18edb..a25dc44 100644
--- a/logd/tests/AndroidTest.xml
+++ b/logd/tests/AndroidTest.xml
@@ -18,6 +18,7 @@
     <option name="config-descriptor:metadata" key="component" value="systems" />
     <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
     <option name="config-descriptor:metadata" key="parameter" value="multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
     <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
         <option name="cleanup" value="true" />
         <option name="push" value="CtsLogdTestCases->/data/local/tmp/CtsLogdTestCases" />
diff --git a/logd/tests/logd_test.cpp b/logd/tests/logd_test.cpp
index 80625a7..f47bee1 100644
--- a/logd/tests/logd_test.cpp
+++ b/logd/tests/logd_test.cpp
@@ -241,47 +241,18 @@
 static void caught_signal(int /* signum */) {
 }
 
-static void dump_log_msg(const char* prefix, log_msg* msg, unsigned int version,
-                         int lid) {
+static void dump_log_msg(const char* prefix, log_msg* msg, int lid) {
     std::cout << std::flush;
     std::cerr << std::flush;
     fflush(stdout);
     fflush(stderr);
-    switch (msg->entry.hdr_size) {
-        case 0:
-            version = 1;
-            break;
+    EXPECT_EQ(sizeof(logger_entry), msg->entry.hdr_size);
 
-        case sizeof(msg->entry_v2): /* PLUS case sizeof(msg->entry_v3): */
-            if (version == 0) {
-                version = (msg->entry_v3.lid < LOG_ID_MAX) ? 3 : 2;
-            }
-            break;
-
-        case sizeof(msg->entry_v4):
-            if (version == 0) {
-                version = 4;
-            }
-            break;
-    }
-
-    fprintf(stderr, "%s: v%u[%u] ", prefix, version, msg->len());
-    if (version != 1) {
-        fprintf(stderr, "hdr_size=%u ", msg->entry.hdr_size);
-    }
-    fprintf(stderr, "pid=%u tid=%u %u.%09u ", msg->entry.pid, msg->entry.tid,
-            msg->entry.sec, msg->entry.nsec);
-    switch (version) {
-        case 1:
-            break;
-        case 2:
-            fprintf(stderr, "euid=%u ", msg->entry_v2.euid);
-            break;
-        case 3:
-        default:
-            lid = msg->entry.lid;
-            break;
-    }
+    fprintf(stderr, "%s: [%u] ", prefix, msg->len());
+    fprintf(stderr, "hdr_size=%u ", msg->entry.hdr_size);
+    fprintf(stderr, "pid=%u tid=%u %u.%09u ", msg->entry.pid, msg->entry.tid, msg->entry.sec,
+            msg->entry.nsec);
+    lid = msg->entry.lid;
 
     switch (lid) {
         case 0:
@@ -584,11 +555,11 @@
     }
 
     if (content_wrap) {
-        dump_log_msg("wrap", &msg_wrap, 3, -1);
+        dump_log_msg("wrap", &msg_wrap, -1);
     }
 
     if (content_timeout) {
-        dump_log_msg("timeout", &msg_timeout, 3, -1);
+        dump_log_msg("timeout", &msg_timeout, -1);
     }
 
     EXPECT_TRUE(written);
@@ -721,11 +692,11 @@
     }
 
     if (content_wrap) {
-        dump_log_msg("wrap", &msg_wrap, 3, -1);
+        dump_log_msg("wrap", &msg_wrap, -1);
     }
 
     if (content_timeout) {
-        dump_log_msg("timeout", &msg_timeout, 3, -1);
+        dump_log_msg("timeout", &msg_timeout, -1);
     }
 
     if (content_wrap || !content_timeout) {
@@ -776,7 +747,7 @@
 
     EXPECT_TRUE(read_one);
     if (read_one) {
-        dump_log_msg("user", &msg, 3, -1);
+        dump_log_msg("user", &msg, -1);
     }
 
     fprintf(stderr, "Sleep for >%d seconds logd SO_SNDTIMEO ...\n", sndtimeo);
@@ -794,7 +765,7 @@
 
     EXPECT_EQ(0, recv_ret);
     if (recv_ret > 0) {
-        dump_log_msg("user", &msg, 3, -1);
+        dump_log_msg("user", &msg, -1);
     }
     EXPECT_EQ(0, save_errno);
 
diff --git a/property_service/Android.bp b/property_service/Android.bp
deleted file mode 100644
index b44c296..0000000
--- a/property_service/Android.bp
+++ /dev/null
@@ -1 +0,0 @@
-subdirs = ["*"]
diff --git a/property_service/libpropertyinfoparser/Android.bp b/property_service/libpropertyinfoparser/Android.bp
index ac802b5..108d15a 100644
--- a/property_service/libpropertyinfoparser/Android.bp
+++ b/property_service/libpropertyinfoparser/Android.bp
@@ -2,6 +2,7 @@
     name: "libpropertyinfoparser",
     host_supported: true,
     vendor_available: true,
+    ramdisk_available: true,
     recovery_available: true,
     native_bridge_supported: true,
     srcs: ["property_info_parser.cpp"],
diff --git a/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h b/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
index 439813d..dfb1d11 100644
--- a/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
+++ b/property_service/libpropertyinfoserializer/include/property_info_serializer/property_info_serializer.h
@@ -14,8 +14,7 @@
 // limitations under the License.
 //
 
-#ifndef PROPERTY_INFO_SERIALIZER_H
-#define PROPERTY_INFO_SERIALIZER_H
+#pragma once
 
 #include <string>
 #include <vector>
@@ -41,11 +40,9 @@
                const std::string& default_context, const std::string& default_type,
                std::string* serialized_trie, std::string* error);
 
-void ParsePropertyInfoFile(const std::string& file_contents,
+void ParsePropertyInfoFile(const std::string& file_contents, bool require_prefix_or_exact,
                            std::vector<PropertyInfoEntry>* property_infos,
                            std::vector<std::string>* errors);
 
 }  // namespace properties
 }  // namespace android
-
-#endif
diff --git a/property_service/libpropertyinfoserializer/property_info_file.cpp b/property_service/libpropertyinfoserializer/property_info_file.cpp
index 2cdc62d..771a9ce 100644
--- a/property_service/libpropertyinfoserializer/property_info_file.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_file.cpp
@@ -56,7 +56,8 @@
   return false;
 }
 
-bool ParsePropertyInfoLine(const std::string& line, PropertyInfoEntry* out, std::string* error) {
+bool ParsePropertyInfoLine(const std::string& line, bool require_prefix_or_exact,
+                           PropertyInfoEntry* out, std::string* error) {
   auto tokenizer = SpaceTokenizer(line);
 
   auto property = tokenizer.GetNext();
@@ -72,7 +73,7 @@
   }
 
   // It is not an error to not find exact_match or a type, as older files will not contain them.
-  auto exact_match = tokenizer.GetNext();
+  auto match_operation = tokenizer.GetNext();
   // We reformat type to be space deliminated regardless of the input whitespace for easier storage
   // and subsequent parsing.
   auto type_strings = std::vector<std::string>{};
@@ -82,18 +83,27 @@
     type = tokenizer.GetNext();
   }
 
+  bool exact_match = false;
+  if (match_operation == "exact") {
+    exact_match = true;
+  } else if (match_operation != "prefix" && match_operation != "" && require_prefix_or_exact) {
+    *error = "Match operation '" + match_operation +
+             "' is not valid: must be either 'prefix' or 'exact'";
+    return false;
+  }
+
   if (!type_strings.empty() && !IsTypeValid(type_strings)) {
     *error = "Type '" + Join(type_strings, " ") + "' is not valid";
     return false;
   }
 
-  *out = {property, context, Join(type_strings, " "), exact_match == "exact"};
+  *out = {property, context, Join(type_strings, " "), exact_match};
   return true;
 }
 
 }  // namespace
 
-void ParsePropertyInfoFile(const std::string& file_contents,
+void ParsePropertyInfoFile(const std::string& file_contents, bool require_prefix_or_exact,
                            std::vector<PropertyInfoEntry>* property_infos,
                            std::vector<std::string>* errors) {
   // Do not clear property_infos to allow this function to be called on multiple files, with
@@ -108,7 +118,8 @@
 
     auto property_info_entry = PropertyInfoEntry{};
     auto parse_error = std::string{};
-    if (!ParsePropertyInfoLine(trimmed_line, &property_info_entry, &parse_error)) {
+    if (!ParsePropertyInfoLine(trimmed_line, require_prefix_or_exact, &property_info_entry,
+                               &parse_error)) {
       errors->emplace_back(parse_error);
       continue;
     }
diff --git a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
index 33da1f1..f4a846f 100644
--- a/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
+++ b/property_service/libpropertyinfoserializer/property_info_serializer_test.cpp
@@ -375,9 +375,11 @@
       {"audio_hal.period_size", "u:object_r:default_prop:s0"},
       {"bluetooth.enable_timeout_ms", "u:object_r:bluetooth_prop:s0"},
       {"dalvik.vm.appimageformat", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.boot-dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.boot-dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-Xms", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-Xmx", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.dexopt.secondary", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.heapgrowthlimit", "u:object_r:dalvik_prop:s0"},
@@ -388,6 +390,7 @@
       {"dalvik.vm.heaptargetutilization", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-Xms", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-Xmx", "u:object_r:dalvik_prop:s0"},
+      {"dalvik.vm.image-dex2oat-cpu-set", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.image-dex2oat-threads", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.isa.arm.features", "u:object_r:dalvik_prop:s0"},
       {"dalvik.vm.isa.arm.variant", "u:object_r:dalvik_prop:s0"},
diff --git a/property_service/property_info_checker/Android.bp b/property_service/property_info_checker/Android.bp
index 7d66199..65e660a 100644
--- a/property_service/property_info_checker/Android.bp
+++ b/property_service/property_info_checker/Android.bp
@@ -7,6 +7,7 @@
         "libpropertyinfoserializer",
         "libpropertyinfoparser",
         "libbase",
+        "liblog",
         "libsepol",
     ],
     srcs: ["property_info_checker.cpp"],
diff --git a/property_service/property_info_checker/property_info_checker.cpp b/property_service/property_info_checker/property_info_checker.cpp
index 52c4383..61b368e 100644
--- a/property_service/property_info_checker/property_info_checker.cpp
+++ b/property_service/property_info_checker/property_info_checker.cpp
@@ -153,7 +153,7 @@
     }
 
     auto errors = std::vector<std::string>{};
-    ParsePropertyInfoFile(file_contents, &property_info_entries, &errors);
+    ParsePropertyInfoFile(file_contents, true, &property_info_entries, &errors);
     if (!errors.empty()) {
       for (const auto& error : errors) {
         std::cerr << "Could not read line from '" << filename << "': " << error << std::endl;
diff --git a/reboot/Android.bp b/reboot/Android.bp
index 805fd9a..cc71723 100644
--- a/reboot/Android.bp
+++ b/reboot/Android.bp
@@ -5,4 +5,5 @@
     srcs: ["reboot.c"],
     shared_libs: ["libcutils"],
     cflags: ["-Werror"],
+    recovery_available: true,
 }
diff --git a/libmeminfo/libdmabufinfo/tools/Android.bp b/rootdir/Android.bp
similarity index 64%
copy from libmeminfo/libdmabufinfo/tools/Android.bp
copy to rootdir/Android.bp
index 224b68e..96b5e0d 100644
--- a/libmeminfo/libdmabufinfo/tools/Android.bp
+++ b/rootdir/Android.bp
@@ -1,4 +1,4 @@
-// Copyright (C) 2019 The Android Open Source Project
+// Copyright 2019 The Android Open Source Project
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -12,19 +12,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-cc_binary {
-    name: "dmabuf_dump",
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
+prebuilt_etc {
+    name: "init.rc",
+    src: "init.rc",
+    sub_dir: "init/hw",
+    required: ["fsverity_init"],
+}
 
-    srcs: ["dmabuf_dump.cpp"],
-    shared_libs: [
-        "libbase",
-    ],
-    static_libs: [
-        "libdmabufinfo",
-    ],
-    product_specific: true,
-}
\ No newline at end of file
+prebuilt_etc {
+    name: "ueventd.rc",
+    src: "ueventd.rc",
+    recovery_available: true,
+}
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index e1bb02f..a9d0ed0 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -1,22 +1,6 @@
 LOCAL_PATH:= $(call my-dir)
 
 #######################################
-# init.rc
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := init.rc
-LOCAL_SRC_FILES := $(LOCAL_MODULE)
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
-LOCAL_REQUIRED_MODULES := fsverity_init
-
-# The init symlink must be a post install command of a file that is to TARGET_ROOT_OUT.
-# Since init.rc is required for init and satisfies that requirement, we hijack it to create the symlink.
-LOCAL_POST_INSTALL_CMD := ln -sf /system/bin/init $(TARGET_ROOT_OUT)/init
-
-include $(BUILD_PREBUILT)
-
-#######################################
 # init-debug.rc
 include $(CLEAR_VARS)
 
@@ -83,16 +67,22 @@
   EXPORT_GLOBAL_GCOV_OPTIONS := export GCOV_PREFIX /data/misc/trace
 endif
 
+EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS :=
+ifeq ($(CLANG_COVERAGE),true)
+  EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS := export LLVM_PROFILE_FILE /data/misc/trace/clang-%p-%m.profraw
+endif
+
 # Put it here instead of in init.rc module definition,
 # because init.rc is conditionally included.
 #
 # create some directories (some are mount points) and symlinks
 LOCAL_POST_INSTALL_CMD := mkdir -p $(addprefix $(TARGET_ROOT_OUT)/, \
-    dev proc sys system data odm oem acct config storage mnt apex debug_ramdisk $(BOARD_ROOT_EXTRA_FOLDERS)); \
+    dev proc sys system data data_mirror odm oem acct config storage mnt apex debug_ramdisk \
+    linkerconfig $(BOARD_ROOT_EXTRA_FOLDERS)); \
     ln -sf /system/bin $(TARGET_ROOT_OUT)/bin; \
     ln -sf /system/etc $(TARGET_ROOT_OUT)/etc; \
     ln -sf /data/user_de/0/com.android.shell/files/bugreports $(TARGET_ROOT_OUT)/bugreports; \
-    ln -sf /sys/kernel/debug $(TARGET_ROOT_OUT)/d; \
+    ln -sfn /sys/kernel/debug $(TARGET_ROOT_OUT)/d; \
     ln -sf /storage/self/primary $(TARGET_ROOT_OUT)/sdcard
 ifdef BOARD_USES_VENDORIMAGE
   LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/vendor
@@ -148,6 +138,10 @@
   LOCAL_POST_INSTALL_CMD += ; mkdir -p $(TARGET_ROOT_OUT)/postinstall
 endif
 
+# The init symlink must be a post install command of a file that is to TARGET_ROOT_OUT.
+# Since init.environ.rc is required for init and satisfies that requirement, we hijack it to create the symlink.
+LOCAL_POST_INSTALL_CMD += ; ln -sf /system/bin/init $(TARGET_ROOT_OUT)/init
+
 include $(BUILD_SYSTEM)/base_rules.mk
 
 $(LOCAL_BUILT_MODULE): $(LOCAL_PATH)/init.environ.rc.in
@@ -158,6 +152,7 @@
 	$(hide) sed -i -e 's?%SYSTEMSERVERCLASSPATH%?$(PRODUCT_SYSTEM_SERVER_CLASSPATH)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_ASAN_OPTIONS%?$(EXPORT_GLOBAL_ASAN_OPTIONS)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_GCOV_OPTIONS%?$(EXPORT_GLOBAL_GCOV_OPTIONS)?g' $@
+	$(hide) sed -i -e 's?%EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS%?$(EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_HWASAN_OPTIONS%?$(EXPORT_GLOBAL_HWASAN_OPTIONS)?g' $@
 
 # Append PLATFORM_VNDK_VERSION to base name.
@@ -167,205 +162,6 @@
 )
 endef
 
-
-#######################################
-# ld.config.txt selection variables
-#
-_enforce_vndk_at_runtime := false
-ifdef BOARD_VNDK_VERSION
-  ifneq ($(BOARD_VNDK_RUNTIME_DISABLE),true)
-    _enforce_vndk_at_runtime := true
-  endif
-endif
-
-_enforce_vndk_lite_at_runtime := false
-ifeq ($(_enforce_vndk_at_runtime),false)
-  ifeq ($(PRODUCT_TREBLE_LINKER_NAMESPACES)|$(SANITIZE_TARGET),true|)
-    _enforce_vndk_lite_at_runtime := true
-  endif
-endif
-
-#######################################
-# ld.config.txt
-#
-# For VNDK enforced devices that have defined BOARD_VNDK_VERSION, use
-# "ld.config.txt" as a source file. This configuration includes strict VNDK
-# run-time restrictions for vendor process.
-#
-# Other treblized devices, that have not defined BOARD_VNDK_VERSION or that
-# have set BOARD_VNDK_RUNTIME_DISABLE to true, use "ld.config.vndk_lite.txt"
-# as a source file. This configuration does not have strict VNDK run-time
-# restrictions.
-#
-# If the device is not treblized, use "ld.config.legacy.txt" for legacy
-# namespace configuration.
-#
-include $(CLEAR_VARS)
-LOCAL_MODULE := ld.config.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-
-# Start of i18n and ART APEX compatibility.
-#
-# Meta-comment:
-# The placing of this section is somewhat arbitrary. The LOCAL_POST_INSTALL_CMD
-# entries need to be associated with something that goes into /system.
-# ld.config.txt qualifies but it could be anything else in /system until soong
-# supports creation of symlinks. http://b/123333111
-#
-# Keeping the appearance of files/dirs having old locations for apps that have
-# come to rely on them.
-
-# http://b/121248172 - create a link from /system/usr/icu to
-# /apex/com.android.i18n/etc/icu so that apps can find the ICU .dat file.
-# A symlink can't overwrite a directory and the /system/usr/icu directory once
-# existed so the required structure must be created whatever we find.
-LOCAL_POST_INSTALL_CMD = mkdir -p $(TARGET_OUT)/usr && rm -rf $(TARGET_OUT)/usr/icu
-LOCAL_POST_INSTALL_CMD += && ln -sf /apex/com.android.i18n/etc/icu $(TARGET_OUT)/usr/icu
-
-# TODO(b/124106384): Clean up compat symlinks for ART binaries.
-ART_BINARIES := dalvikvm dex2oat
-LOCAL_POST_INSTALL_CMD += && mkdir -p $(TARGET_OUT)/bin
-$(foreach b,$(ART_BINARIES), \
-  $(eval LOCAL_POST_INSTALL_CMD += \
-    && ln -sf /apex/com.android.art/bin/$(b) $(TARGET_OUT)/bin/$(b)) \
-)
-
-# End of i18n and ART APEX compatibilty.
-
-ifeq ($(_enforce_vndk_at_runtime),true)
-
-# for VNDK enforced devices
-# This file will be replaced with dynamically generated one from system/linkerconfig
-LOCAL_MODULE_STEM := $(LOCAL_MODULE)
-LOCAL_SRC_FILES := etc/ld.config.txt
-include $(BUILD_PREBUILT)
-
-else ifeq ($(_enforce_vndk_lite_at_runtime),true)
-
-# for treblized but VNDK lightly enforced devices
-LOCAL_MODULE_STEM := ld.config.vndk_lite.txt
-include $(BUILD_SYSTEM)/base_rules.mk
-ld_config_template := $(LOCAL_PATH)/etc/ld.config.vndk_lite.txt
-vndk_version := $(PLATFORM_VNDK_VERSION)
-libz_is_llndk := true
-include $(LOCAL_PATH)/update_and_install_ld_config.mk
-
-else
-
-# for legacy non-treblized devices
-LOCAL_MODULE_STEM := $(LOCAL_MODULE)
-LOCAL_SRC_FILES := etc/ld.config.legacy.txt
-include $(BUILD_PREBUILT)
-
-endif  # ifeq ($(_enforce_vndk_at_runtime),true)
-
-#######################################
-# ld.config.vndk_lite.txt
-#
-# This module is only for GSI.
-#
-ifeq ($(_enforce_vndk_lite_at_runtime),false)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := ld.config.vndk_lite.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(LOCAL_MODULE)
-include $(BUILD_SYSTEM)/base_rules.mk
-ld_config_template := $(LOCAL_PATH)/etc/ld.config.vndk_lite.txt
-vndk_version := $(PLATFORM_VNDK_VERSION)
-libz_is_llndk := true
-include $(LOCAL_PATH)/update_and_install_ld_config.mk
-
-endif  # ifeq ($(_enforce_vndk_lite_at_runtime),false)
-
-_enforce_vndk_at_runtime :=
-_enforce_vndk_lite_at_runtime :=
-
-#######################################
-# ld.config.txt for recovery
-include $(CLEAR_VARS)
-LOCAL_MODULE := ld.config.recovery.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_SRC_FILES := etc/ld.config.recovery.txt
-LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/system/etc
-LOCAL_MODULE_STEM := ld.config.txt
-include $(BUILD_PREBUILT)
-
-# Returns the unique installed basenames of a module, or module.so if there are
-# none.  The guess is to handle cases like libc, where the module itself is
-# marked uninstallable but a symlink is installed with the name libc.so.
-# $(1): list of libraries
-# $(2): suffix to to add to each library (not used for guess)
-define module-installed-files-or-guess
-$(foreach lib,$(1),$(or $(strip $(sort $(notdir $(call module-installed-files,$(lib)$(2))))),$(lib).so))
-endef
-
-#######################################
-# llndk.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := llndk.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_LLNDK_LIBRARIES := $(call module-installed-files-or-guess,$(LLNDK_LIBRARIES),)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_LLNDK_LIBRARIES), \
-		echo $(lib) >> $@;)
-
-#######################################
-# vndksp.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndksp.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_SAMEPROCESS_LIBRARIES := $(call module-installed-files-or-guess,$(VNDK_SAMEPROCESS_LIBRARIES),.vendor)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_SAMEPROCESS_LIBRARIES), \
-		echo $(lib) >> $@;)
-
-#######################################
-# vndkcore.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndkcore.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_CORE_LIBRARIES := $(call module-installed-files-or-guess,$(VNDK_CORE_LIBRARIES),.vendor)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_CORE_LIBRARIES), \
-		echo $(lib) >> $@;)
-
-#######################################
-# vndkprivate.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndkprivate.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_PRIVATE_LIBRARIES := $(call module-installed-files-or-guess,$(VNDK_PRIVATE_LIBRARIES),.vendor)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_PRIVATE_LIBRARIES), \
-		echo $(lib) >> $@;)
-
 #######################################
 # sanitizer.libraries.txt
 include $(CLEAR_VARS)
@@ -391,22 +187,6 @@
 		echo $(lib) >> $@;)
 
 #######################################
-# vndkcorevariant.libraries.txt
-include $(CLEAR_VARS)
-LOCAL_MODULE := vndkcorevariant.libraries.txt
-LOCAL_MODULE_CLASS := ETC
-LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)
-LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
-include $(BUILD_SYSTEM)/base_rules.mk
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_CORE_VARIANT_LIBRARIES := $(call module-installed-files-or-guess,$(VNDK_USING_CORE_VARIANT_LIBRARIES),.vendor)
-$(LOCAL_BUILT_MODULE):
-	@echo "Generate: $@"
-	@mkdir -p $(dir $@)
-	$(hide) echo -n > $@
-	$(hide) $(foreach lib,$(PRIVATE_VNDK_CORE_VARIANT_LIBRARIES), \
-		echo $(lib) >> $@;)
-
-#######################################
 # adb_debug.prop in debug ramdisk
 include $(CLEAR_VARS)
 LOCAL_MODULE := adb_debug.prop
diff --git a/rootdir/avb/Android.mk b/rootdir/avb/Android.mk
index 5dc019c..80573fb 100644
--- a/rootdir/avb/Android.mk
+++ b/rootdir/avb/Android.mk
@@ -16,6 +16,21 @@
 include $(BUILD_PREBUILT)
 
 #######################################
+# q-developer-gsi.avbpubkey
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := q-developer-gsi.avbpubkey
+LOCAL_MODULE_CLASS := ETC
+LOCAL_SRC_FILES := $(LOCAL_MODULE)
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/first_stage_ramdisk/avb
+else
+LOCAL_MODULE_PATH := $(TARGET_RAMDISK_OUT)/avb
+endif
+
+include $(BUILD_PREBUILT)
+
+#######################################
 # r-gsi.avbpubkey
 include $(CLEAR_VARS)
 
diff --git a/rootdir/avb/q-developer-gsi.avbpubkey b/rootdir/avb/q-developer-gsi.avbpubkey
new file mode 100644
index 0000000..0ace69d
--- /dev/null
+++ b/rootdir/avb/q-developer-gsi.avbpubkey
Binary files differ
diff --git a/rootdir/etc/ld.config.legacy.txt b/rootdir/etc/ld.config.legacy.txt
index a99756a..5c87843 100644
--- a/rootdir/etc/ld.config.legacy.txt
+++ b/rootdir/etc/ld.config.legacy.txt
@@ -1,198 +1,3 @@
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Bionic loader config file.
-# This gives the exactly the same namespace setup in pre-O.
-#
-
-# All binaries gets the same configuration 'legacy'
-dir.legacy = /system
-dir.legacy = /product
-dir.legacy = /vendor
-dir.legacy = /odm
-dir.legacy = /sbin
-
-# Except for /postinstall, where only /system and /product are searched
-dir.postinstall = /postinstall
-
-# Fallback entry to provide APEX namespace lookups for binaries anywhere else.
-# This must be last.
-dir.legacy = /data
-
-[legacy]
-namespace.default.isolated = false
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.default.visible = true
-
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /product/${LIB}
-namespace.default.search.paths += /vendor/${LIB}
-namespace.default.search.paths += /odm/${LIB}
-
-namespace.default.asan.search.paths  = /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/product/${LIB}
-namespace.default.asan.search.paths +=           /product/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-
-###############################################################################
-# APEX related namespaces.
-###############################################################################
-
-additional.namespaces = art,conscrypt,media,neuralnetworks,resolv
-
-# Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-# If a shared library or an executable requests a shared library that
-# cannot be loaded into the default namespace, the dynamic linker tries
-# to load the shared library from the art namespace. And then, if the
-# shared library cannot be loaded from the art namespace either, the
-# dynamic linker tries to load the shared library from the resolv namespace.
-# Finally, if all attempts fail, the dynamic linker returns an error.
-namespace.default.links = art,resolv,neuralnetworks
-namespace.default.asan.links = art,resolv,neuralnetworks
-namespace.default.link.art.shared_libs  = libandroidicu.so
-namespace.default.link.art.shared_libs += libdexfile_external.so
-namespace.default.link.art.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.art.shared_libs += libicui18n.so
-namespace.default.link.art.shared_libs += libicuuc.so
-namespace.default.link.art.shared_libs += libnativebridge.so
-namespace.default.link.art.shared_libs += libnativehelper.so
-namespace.default.link.art.shared_libs += libnativeloader.so
-
-# TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.art.shared_libs += libpac.so
-
-# When libnetd_resolv.so can't be found in the default namespace, search for it
-# in the resolv namespace. Don't allow any other libraries from the resolv namespace
-# to be loaded in the default namespace.
-namespace.default.link.resolv.shared_libs = libnetd_resolv.so
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "art" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the ART APEX.
-# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.art.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.art.visible = true
-
-namespace.art.search.paths = /apex/com.android.art/${LIB}
-namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
-namespace.art.links = default,neuralnetworks
-# Need allow_all_shared_libs because libart.so can dlopen oat files in
-# /system/framework and /data.
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.art.link.default.allow_all_shared_libs = true
-namespace.art.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "media" APEX namespace
-#
-# This namespace is for libraries within the media APEX.
-###############################################################################
-namespace.media.isolated = true
-namespace.media.visible = true
-
-namespace.media.search.paths = /apex/com.android.media/${LIB}
-namespace.media.asan.search.paths = /apex/com.android.media/${LIB}
-
-namespace.media.permitted.paths = /apex/com.android.media/${LIB}/extractors
-
-namespace.media.links = default
-namespace.media.link.default.shared_libs  = libbinder_ndk.so
-namespace.media.link.default.shared_libs += libc.so
-namespace.media.link.default.shared_libs += libcgrouprc.so
-namespace.media.link.default.shared_libs += libdl.so
-namespace.media.link.default.shared_libs += liblog.so
-namespace.media.link.default.shared_libs += libmediametrics.so
-namespace.media.link.default.shared_libs += libmediandk.so
-namespace.media.link.default.shared_libs += libm.so
-namespace.media.link.default.shared_libs += libvndksupport.so
-
-namespace.media.link.default.shared_libs += libclang_rt.asan-aarch64-android.so
-namespace.media.link.default.shared_libs += libclang_rt.asan-arm-android.so
-namespace.media.link.default.shared_libs += libclang_rt.asan-i686-android.so
-namespace.media.link.default.shared_libs += libclang_rt.asan-x86_64-android.so
-namespace.media.link.default.shared_libs += libclang_rt.hwasan-aarch64-android.so
-
-###############################################################################
-# "conscrypt" APEX namespace
-#
-# This namespace is for libraries within the conscrypt APEX.
-# Keep in sync with the "conscrypt" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.conscrypt.isolated = true
-namespace.conscrypt.visible = true
-
-namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = art,default
-namespace.conscrypt.link.art.shared_libs = libandroidio.so
-namespace.conscrypt.link.default.shared_libs  = libc.so
-namespace.conscrypt.link.default.shared_libs += libm.so
-namespace.conscrypt.link.default.shared_libs += libdl.so
-namespace.conscrypt.link.default.shared_libs += liblog.so
-
-###############################################################################
-# "resolv" APEX namespace
-#
-# This namespace is for libraries within the resolv APEX.
-###############################################################################
-namespace.resolv.isolated = true
-namespace.resolv.visible = true
-
-namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.links = default
-namespace.resolv.link.default.shared_libs  = libc.so
-namespace.resolv.link.default.shared_libs += libcgrouprc.so
-namespace.resolv.link.default.shared_libs += libm.so
-namespace.resolv.link.default.shared_libs += libdl.so
-namespace.resolv.link.default.shared_libs += libbinder_ndk.so
-namespace.resolv.link.default.shared_libs += liblog.so
-namespace.resolv.link.default.shared_libs += libvndksupport.so
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-
-
-###############################################################################
-# Namespace config for binaries under /postinstall.
-# Only one default namespace is defined and it has no directories other than
-# /system/lib and /product/lib in the search paths. This is because linker
-# calls realpath on the search paths and this causes selinux denial if the
-# paths (/vendor, /odm) are not allowed to the poinstall binaries.
-# There is no reason to allow the binaries to access the paths.
-###############################################################################
-[postinstall]
-namespace.default.isolated = false
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /product/${LIB}
+# This file is no longer in use.
+# Please update linker configuration generator instead.
+# You can find the code from /system/linkerconfig
\ No newline at end of file
diff --git a/rootdir/etc/ld.config.recovery.txt b/rootdir/etc/ld.config.recovery.txt
index 5d6c01a..5c87843 100644
--- a/rootdir/etc/ld.config.recovery.txt
+++ b/rootdir/etc/ld.config.recovery.txt
@@ -1,9 +1,3 @@
-# Copyright (C) 2018 The Android Open Source Project
-#
-# Bionic loader config file for recovery mode
-#
-
-dir.recovery = /system/bin
-
-[recovery]
-namespace.default.search.paths = /system/${LIB}
+# This file is no longer in use.
+# Please update linker configuration generator instead.
+# You can find the code from /system/linkerconfig
\ No newline at end of file
diff --git a/rootdir/etc/ld.config.vndk_lite.txt b/rootdir/etc/ld.config.vndk_lite.txt
index 9c9f4a9..5c87843 100644
--- a/rootdir/etc/ld.config.vndk_lite.txt
+++ b/rootdir/etc/ld.config.vndk_lite.txt
@@ -1,609 +1,3 @@
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Bionic loader config file.
-#
-
-# Don't change the order here. The first pattern that matches with the
-# absolute path of an executable is selected.
-dir.system = /system/bin/
-dir.system = /system/xbin/
-dir.system = /%SYSTEM_EXT%/bin/
-dir.system = /%PRODUCT%/bin/
-
-dir.vendor = /odm/bin/
-dir.vendor = /vendor/bin/
-dir.vendor = /data/nativetest/odm
-dir.vendor = /data/nativetest64/odm
-dir.vendor = /data/benchmarktest/odm
-dir.vendor = /data/benchmarktest64/odm
-dir.vendor = /data/nativetest/vendor
-dir.vendor = /data/nativetest64/vendor
-dir.vendor = /data/benchmarktest/vendor
-dir.vendor = /data/benchmarktest64/vendor
-
-dir.unrestricted = /data/nativetest/unrestricted
-dir.unrestricted = /data/nativetest64/unrestricted
-
-# TODO(b/123864775): Ensure tests are run from /data/nativetest{,64} or (if
-# necessary) the unrestricted subdirs above. Then clean this up.
-dir.unrestricted = /data/local/tmp
-
-dir.postinstall = /postinstall
-
-# Fallback entry to provide APEX namespace lookups for binaries anywhere else.
-# This must be last.
-dir.system = /data
-
-[system]
-additional.namespaces = art,conscrypt,media,neuralnetworks,resolv,sphal,vndk,rs
-
-###############################################################################
-# "default" namespace
-#
-# Framework-side code runs in this namespace. However, libs from other
-# partitions are also allowed temporarily.
-###############################################################################
-namespace.default.isolated = false
-# Visible because some libraries are dlopen'ed, e.g. libopenjdk is dlopen'ed by
-# libart.
-namespace.default.visible = true
-
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.search.paths += /%PRODUCT%/${LIB}
-namespace.default.search.paths += /odm/${LIB}
-namespace.default.search.paths += /vendor/${LIB}
-
-namespace.default.asan.search.paths  = /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths +=           /%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths += /data/asan/%PRODUCT%/${LIB}
-namespace.default.asan.search.paths +=           /%PRODUCT%/${LIB}
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-
-# Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-# If a shared library or an executable requests a shared library that
-# cannot be loaded into the default namespace, the dynamic linker tries
-# to load the shared library from the art namespace. And then, if the
-# shared library cannot be loaded from the art namespace either, the
-# dynamic linker tries to load the shared library from the resolv namespace.
-# Finally, if all attempts fail, the dynamic linker returns an error.
-namespace.default.links = art,resolv,neuralnetworks
-namespace.default.link.art.shared_libs  = libandroidicu.so
-namespace.default.link.art.shared_libs += libdexfile_external.so
-namespace.default.link.art.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.art.shared_libs += libicui18n.so
-namespace.default.link.art.shared_libs += libicuuc.so
-namespace.default.link.art.shared_libs += libnativebridge.so
-namespace.default.link.art.shared_libs += libnativehelper.so
-namespace.default.link.art.shared_libs += libnativeloader.so
-
-# TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.art.shared_libs += libpac.so
-
-# When libnetd_resolv.so can't be found in the default namespace, search for it
-# in the resolv namespace. Don't allow any other libraries from the resolv namespace
-# to be loaded in the default namespace.
-namespace.default.link.resolv.shared_libs = libnetd_resolv.so
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "art" APEX namespace
-#
-# This namespace pulls in externally accessible libs from the ART APEX.
-# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.art.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.art.visible = true
-
-namespace.art.search.paths = /apex/com.android.art/${LIB}
-namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
-namespace.art.links = default,neuralnetworks
-# Need allow_all_shared_libs because libart.so can dlopen oat files in
-# /system/framework and /data.
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.art.link.default.allow_all_shared_libs = true
-namespace.art.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "media" APEX namespace
-#
-# This namespace is for libraries within the media APEX.
-###############################################################################
-namespace.media.isolated = true
-namespace.media.visible = true
-
-namespace.media.search.paths = /apex/com.android.media/${LIB}
-namespace.media.asan.search.paths = /apex/com.android.media/${LIB}
-
-namespace.media.permitted.paths = /apex/com.android.media/${LIB}/extractors
-
-namespace.media.links = default,neuralnetworks
-namespace.media.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.media.link.default.shared_libs += libbinder_ndk.so
-namespace.media.link.default.shared_libs += libmediametrics.so
-namespace.media.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.media.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "conscrypt" APEX namespace
-#
-# This namespace is for libraries within the conscrypt APEX.
-# Keep in sync with the "conscrypt" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.conscrypt.isolated = true
-namespace.conscrypt.visible = true
-
-namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = art,default
-namespace.conscrypt.link.art.shared_libs = libandroidio.so
-namespace.conscrypt.link.default.shared_libs  = libc.so
-namespace.conscrypt.link.default.shared_libs += libm.so
-namespace.conscrypt.link.default.shared_libs += libdl.so
-namespace.conscrypt.link.default.shared_libs += liblog.so
-namespace.conscrypt.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# "resolv" APEX namespace
-#
-# This namespace is for libraries within the resolv APEX.
-###############################################################################
-namespace.resolv.isolated = true
-namespace.resolv.visible = true
-
-namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.links = default
-namespace.resolv.link.default.shared_libs  = libc.so
-namespace.resolv.link.default.shared_libs += libcgrouprc.so
-namespace.resolv.link.default.shared_libs += libm.so
-namespace.resolv.link.default.shared_libs += libdl.so
-namespace.resolv.link.default.shared_libs += libbinder_ndk.so
-namespace.resolv.link.default.shared_libs += liblog.so
-namespace.resolv.link.default.shared_libs += libvndksupport.so
-namespace.resolv.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# "sphal" namespace
-#
-# SP-HAL(Sameprocess-HAL)s are the only vendor libraries that are allowed to be
-# loaded inside system processes. libEGL_<chipset>.so, libGLESv2_<chipset>.so,
-# android.hardware.graphics.mapper@2.0-impl.so, etc are SP-HALs.
-#
-# This namespace is exclusivly for SP-HALs. When the framework tries to dynami-
-# cally load SP-HALs, android_dlopen_ext() is used to explicitly specifying
-# that they should be searched and loaded from this namespace.
-#
-# Note that there is no link from the default namespace to this namespace.
-###############################################################################
-namespace.sphal.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.sphal.visible = true
-
-namespace.sphal.search.paths  = /odm/${LIB}
-namespace.sphal.search.paths += /vendor/${LIB}
-namespace.sphal.search.paths += /vendor/${LIB}/hw
-
-namespace.sphal.permitted.paths  = /odm/${LIB}
-namespace.sphal.permitted.paths += /vendor/${LIB}
-namespace.sphal.permitted.paths += /system/vendor/${LIB}
-
-namespace.sphal.asan.search.paths  = /data/asan/odm/${LIB}
-namespace.sphal.asan.search.paths +=           /odm/${LIB}
-namespace.sphal.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.sphal.asan.search.paths +=           /vendor/${LIB}
-
-namespace.sphal.asan.permitted.paths  = /data/asan/odm/${LIB}
-namespace.sphal.asan.permitted.paths +=           /odm/${LIB}
-namespace.sphal.asan.permitted.paths += /data/asan/vendor/${LIB}
-namespace.sphal.asan.permitted.paths +=           /vendor/${LIB}
-
-# Once in this namespace, access to libraries in /system/lib is restricted. Only
-# libs listed here can be used. Order is important here as the namespaces are
-# tried in this order. rs should be before vndk because both are capable
-# of loading libRS_internal.so
-namespace.sphal.links = rs,default,vndk,neuralnetworks
-
-# Renderscript gets separate namespace
-namespace.sphal.link.rs.shared_libs = libRS_internal.so
-
-namespace.sphal.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.sphal.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-namespace.sphal.link.vndk.shared_libs = %VNDK_SAMEPROCESS_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.sphal.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "rs" namespace
-#
-# This namespace is exclusively for Renderscript internal libraries.
-# This namespace has slightly looser restriction than the vndk namespace because
-# of the genuine characteristics of Renderscript; /data is in the permitted path
-# to load the compiled *.so file and libmediandk.so can be used here.
-###############################################################################
-namespace.rs.isolated = true
-namespace.rs.visible = true
-
-namespace.rs.search.paths  = /odm/${LIB}/vndk-sp
-namespace.rs.search.paths += /vendor/${LIB}/vndk-sp
-namespace.rs.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.search.paths += /odm/${LIB}
-namespace.rs.search.paths += /vendor/${LIB}
-
-namespace.rs.permitted.paths  = /odm/${LIB}
-namespace.rs.permitted.paths += /vendor/${LIB}
-namespace.rs.permitted.paths += /system/vendor/${LIB}
-namespace.rs.permitted.paths += /data
-
-namespace.rs.asan.search.paths  = /data/asan/odm/${LIB}/vndk-sp
-namespace.rs.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.rs.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.rs.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.rs.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.rs.asan.search.paths += /data/asan/odm/${LIB}
-namespace.rs.asan.search.paths +=           /odm/${LIB}
-namespace.rs.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.rs.asan.search.paths +=           /vendor/${LIB}
-
-namespace.rs.asan.permitted.paths  = /data/asan/odm/${LIB}
-namespace.rs.asan.permitted.paths +=           /odm/${LIB}
-namespace.rs.asan.permitted.paths += /data/asan/vendor/${LIB}
-namespace.rs.asan.permitted.paths +=           /vendor/${LIB}
-namespace.rs.asan.permitted.paths += /data
-
-namespace.rs.links = default,neuralnetworks
-
-namespace.rs.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.rs.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-# Private LLNDK libs (e.g. libft2.so) are exceptionally allowed to this
-# namespace because RS framework libs are using them.
-namespace.rs.link.default.shared_libs += %PRIVATE_LLNDK_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.rs.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "vndk" namespace
-#
-# This namespace is exclusively for vndk-sp libs.
-###############################################################################
-namespace.vndk.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.vndk.visible = true
-
-namespace.vndk.search.paths  = /odm/${LIB}/vndk-sp
-namespace.vndk.search.paths += /vendor/${LIB}/vndk-sp
-namespace.vndk.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-
-namespace.vndk.permitted.paths  = /odm/${LIB}/hw
-namespace.vndk.permitted.paths += /odm/${LIB}/egl
-namespace.vndk.permitted.paths += /vendor/${LIB}/hw
-namespace.vndk.permitted.paths += /vendor/${LIB}/egl
-namespace.vndk.permitted.paths += /system/vendor/${LIB}/egl
-# This is exceptionally required since android.hidl.memory@1.0-impl.so is here
-namespace.vndk.permitted.paths += /system/${LIB}/vndk-sp%VNDK_VER%/hw
-
-namespace.vndk.asan.search.paths  = /data/asan/odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.vndk.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.vndk.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-
-namespace.vndk.asan.permitted.paths  = /data/asan/odm/${LIB}/hw
-namespace.vndk.asan.permitted.paths +=           /odm/${LIB}/hw
-namespace.vndk.asan.permitted.paths += /data/asan/odm/${LIB}/egl
-namespace.vndk.asan.permitted.paths +=           /odm/${LIB}/egl
-namespace.vndk.asan.permitted.paths += /data/asan/vendor/${LIB}/hw
-namespace.vndk.asan.permitted.paths +=           /vendor/${LIB}/hw
-namespace.vndk.asan.permitted.paths += /data/asan/vendor/${LIB}/egl
-namespace.vndk.asan.permitted.paths +=           /vendor/${LIB}/egl
-
-namespace.vndk.asan.permitted.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%/hw
-namespace.vndk.asan.permitted.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%/hw
-
-# When these NDK libs are required inside this namespace, then it is redirected
-# to the default namespace. This is possible since their ABI is stable across
-# Android releases.
-namespace.vndk.links = default,neuralnetworks
-
-namespace.vndk.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.vndk.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-namespace.vndk.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# Namespace config for vendor processes. In O, no restriction is enforced for
-# them. However, in O-MR1, access to /system/${LIB} will not be allowed to
-# the default namespace. 'system' namespace will be added to give limited
-# (LL-NDK only) access.
-###############################################################################
-[vendor]
-additional.namespaces = art,neuralnetworks
-
-namespace.default.isolated = false
-
-namespace.default.search.paths  = /odm/${LIB}
-namespace.default.search.paths += /odm/${LIB}/vndk
-namespace.default.search.paths += /odm/${LIB}/vndk-sp
-namespace.default.search.paths += /vendor/${LIB}
-namespace.default.search.paths += /vendor/${LIB}/vndk
-namespace.default.search.paths += /vendor/${LIB}/vndk-sp
-
-# Access to system libraries is allowed
-namespace.default.search.paths += /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.default.search.paths += /system/${LIB}
-namespace.default.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.search.paths += /%PRODUCT%/${LIB}
-# Put /system/lib/vndk at the last search order in vndk_lite for GSI
-namespace.default.search.paths += /system/${LIB}/vndk%VNDK_VER%
-
-namespace.default.asan.search.paths  = /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}/vndk
-namespace.default.asan.search.paths +=           /odm/${LIB}/vndk
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}/vndk-sp
-namespace.default.asan.search.paths +=           /odm/${LIB}/vndk-sp
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}/vndk
-namespace.default.asan.search.paths +=           /vendor/${LIB}/vndk
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}/vndk-sp
-namespace.default.asan.search.paths +=           /vendor/${LIB}/vndk-sp
-namespace.default.asan.search.paths += /data/asan/system/${LIB}/vndk-sp%VNDK_VER%
-namespace.default.asan.search.paths +=           /system/${LIB}/vndk-sp%VNDK_VER%
-namespace.default.asan.search.paths += /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths +=           /%SYSTEM_EXT%/${LIB}
-namespace.default.asan.search.paths += /data/asan/%PRODUCT%/${LIB}
-namespace.default.asan.search.paths +=           /%PRODUCT%/${LIB}
-namespace.default.asan.search.paths += /data/asan/system/${LIB}/vndk%VNDK_VER%
-namespace.default.asan.search.paths +=           /system/${LIB}/vndk%VNDK_VER%
-
-namespace.default.links = art,neuralnetworks
-namespace.default.link.art.shared_libs  = libdexfile_external.so
-namespace.default.link.art.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.art.shared_libs += libicui18n.so
-namespace.default.link.art.shared_libs += libicuuc.so
-namespace.default.link.art.shared_libs += libnativebridge.so
-namespace.default.link.art.shared_libs += libnativehelper.so
-namespace.default.link.art.shared_libs += libnativeloader.so
-# Workaround for b/124772622
-namespace.default.link.art.shared_libs += libandroidicu.so
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "art" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the ART APEX.
-# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.art.isolated = true
-
-namespace.art.search.paths = /apex/com.android.art/${LIB}
-namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
-namespace.art.links = default
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.art.link.default.allow_all_shared_libs = true
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# Namespace config for native tests that need access to both system and vendor
-# libraries. This replicates the default linker config (done by
-# init_default_namespace_no_config in bionic/linker/linker.cpp), except that it
-# includes the requisite namespace setup for APEXes.
-###############################################################################
-[unrestricted]
-additional.namespaces = art,media,conscrypt,resolv,neuralnetworks
-
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.default.visible = true
-
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /odm/${LIB}
-namespace.default.search.paths += /vendor/${LIB}
-
-namespace.default.asan.search.paths  = /data/asan/system/${LIB}
-namespace.default.asan.search.paths +=           /system/${LIB}
-namespace.default.asan.search.paths += /data/asan/odm/${LIB}
-namespace.default.asan.search.paths +=           /odm/${LIB}
-namespace.default.asan.search.paths += /data/asan/vendor/${LIB}
-namespace.default.asan.search.paths +=           /vendor/${LIB}
-
-# Keep in sync with the "platform" namespace in art/build/apex/ld.config.txt.
-namespace.default.links = art,resolv,neuralnetworks
-namespace.default.link.art.shared_libs  = libandroidicu.so
-namespace.default.link.art.shared_libs += libdexfile_external.so
-namespace.default.link.art.shared_libs += libdexfiled_external.so
-# TODO(b/120786417 or b/134659294): libicuuc.so and libicui18n.so are kept for app compat.
-namespace.default.link.art.shared_libs += libicui18n.so
-namespace.default.link.art.shared_libs += libicuuc.so
-namespace.default.link.art.shared_libs += libnativebridge.so
-namespace.default.link.art.shared_libs += libnativehelper.so
-namespace.default.link.art.shared_libs += libnativeloader.so
-
-# TODO(b/122876336): Remove libpac.so once it's migrated to Webview
-namespace.default.link.art.shared_libs += libpac.so
-
-namespace.default.link.resolv.shared_libs = libnetd_resolv.so
-
-# LLNDK library moved into apex
-namespace.default.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "art" APEX namespace
-#
-# This namespace exposes externally accessible libraries from the ART APEX.
-# Keep in sync with the "art" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.art.isolated = true
-# Visible to allow links to be created at runtime, e.g. through
-# android_link_namespaces in libnativeloader.
-namespace.art.visible = true
-
-namespace.art.search.paths = /apex/com.android.art/${LIB}
-namespace.art.asan.search.paths = /apex/com.android.art/${LIB}
-namespace.art.links = default
-# TODO(b/130340935): Use a dynamically created linker namespace similar to
-# classloader-namespace for oat files, and tighten this up.
-namespace.runtime.link.default.allow_all_shared_libs = true
-
-###############################################################################
-# "media" APEX namespace
-#
-# This namespace is for libraries within the media APEX.
-###############################################################################
-namespace.media.isolated = true
-namespace.media.visible = true
-
-namespace.media.search.paths = /apex/com.android.media/${LIB}
-namespace.media.asan.search.paths = /apex/com.android.media/${LIB}
-
-namespace.media.permitted.paths = /apex/com.android.media/${LIB}/extractors
-
-namespace.media.links = default,neuralnetworks
-namespace.media.link.default.shared_libs  = %LLNDK_LIBRARIES%
-namespace.media.link.default.shared_libs += libbinder_ndk.so
-namespace.media.link.default.shared_libs += libmediametrics.so
-namespace.media.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-# LLNDK library moved into apex
-namespace.media.link.neuralnetworks.shared_libs = libneuralnetworks.so
-
-###############################################################################
-# "conscrypt" APEX namespace
-#
-# This namespace is for libraries within the conscrypt APEX.
-# Keep in sync with the "conscrypt" namespace in art/build/apex/ld.config.txt.
-###############################################################################
-namespace.conscrypt.isolated = true
-namespace.conscrypt.visible = true
-
-namespace.conscrypt.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.asan.search.paths = /apex/com.android.conscrypt/${LIB}
-namespace.conscrypt.links = art,default
-namespace.conscrypt.link.art.shared_libs = libandroidio.so
-namespace.conscrypt.link.default.shared_libs  = libc.so
-namespace.conscrypt.link.default.shared_libs += libm.so
-namespace.conscrypt.link.default.shared_libs += libdl.so
-namespace.conscrypt.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# "resolv" APEX namespace
-#
-# This namespace is for libraries within the resolv APEX.
-###############################################################################
-namespace.resolv.isolated = true
-namespace.resolv.visible = true
-
-namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
-namespace.resolv.links = default
-namespace.resolv.link.default.shared_libs  = libc.so
-namespace.resolv.link.default.shared_libs += libcgrouprc.so
-namespace.resolv.link.default.shared_libs += libm.so
-namespace.resolv.link.default.shared_libs += libdl.so
-namespace.resolv.link.default.shared_libs += libbinder_ndk.so
-namespace.resolv.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# "neuralnetworks" APEX namespace
-#
-# This namespace is for libraries within the NNAPI APEX.
-###############################################################################
-namespace.neuralnetworks.isolated = true
-namespace.neuralnetworks.visible = true
-
-namespace.neuralnetworks.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.asan.search.paths = /apex/com.android.neuralnetworks/${LIB}
-namespace.neuralnetworks.links = default
-namespace.neuralnetworks.link.default.shared_libs  = libc.so
-namespace.neuralnetworks.link.default.shared_libs += libcgrouprc.so
-namespace.neuralnetworks.link.default.shared_libs += libdl.so
-namespace.neuralnetworks.link.default.shared_libs += liblog.so
-namespace.neuralnetworks.link.default.shared_libs += libm.so
-namespace.neuralnetworks.link.default.shared_libs += libnativewindow.so
-namespace.neuralnetworks.link.default.shared_libs += libneuralnetworks_packageinfo.so
-namespace.neuralnetworks.link.default.shared_libs += libsync.so
-namespace.neuralnetworks.link.default.shared_libs += libvndksupport.so
-namespace.neuralnetworks.link.default.shared_libs += %SANITIZER_RUNTIME_LIBRARIES%
-
-###############################################################################
-# Namespace config for binaries under /postinstall.
-# Only default namespace is defined and default has no directories
-# other than /system/lib in the search paths. This is because linker calls
-# realpath on the search paths and this causes selinux denial if the paths
-# (/vendor, /odm) are not allowed to the postinstall binaries. There is no
-# reason to allow the binaries to access the paths.
-###############################################################################
-[postinstall]
-namespace.default.isolated = false
-namespace.default.search.paths  = /system/${LIB}
-namespace.default.search.paths += /%SYSTEM_EXT%/${LIB}
-namespace.default.search.paths += /%PRODUCT%/${LIB}
+# This file is no longer in use.
+# Please update linker configuration generator instead.
+# You can find the code from /system/linkerconfig
\ No newline at end of file
diff --git a/rootdir/init.environ.rc.in b/rootdir/init.environ.rc.in
index 50005d9..fdaaf1a 100644
--- a/rootdir/init.environ.rc.in
+++ b/rootdir/init.environ.rc.in
@@ -15,4 +15,5 @@
     export SYSTEMSERVERCLASSPATH %SYSTEMSERVERCLASSPATH%
     %EXPORT_GLOBAL_ASAN_OPTIONS%
     %EXPORT_GLOBAL_GCOV_OPTIONS%
+    %EXPORT_GLOBAL_CLANG_COVERAGE_OPTIONS%
     %EXPORT_GLOBAL_HWASAN_OPTIONS%
diff --git a/rootdir/init.rc b/rootdir/init.rc
index c5bf1603..d6ce0d2 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -5,11 +5,11 @@
 #
 
 import /init.environ.rc
-import /init.usb.rc
+import /system/etc/init/hw/init.usb.rc
 import /init.${ro.hardware}.rc
 import /vendor/etc/init/hw/init.${ro.hardware}.rc
-import /init.usb.configfs.rc
-import /init.${ro.zygote}.rc
+import /system/etc/init/hw/init.usb.configfs.rc
+import /system/etc/init/hw/init.${ro.zygote}.rc
 
 # Cgroups are mounted right before early-init using list from /etc/cgroups.json
 on early-init
@@ -32,18 +32,32 @@
     # cgroup for system_server and surfaceflinger
     mkdir /dev/memcg/system 0550 system system
 
+    # symlink the Android specific /dev/tun to Linux expected /dev/net/tun
+    mkdir /dev/net 0755 root root
+    symlink ../tun /dev/net/tun
+
     # set RLIMIT_NICE to allow priorities from 19 to -20
     setrlimit nice 40 40
 
     # Allow up to 32K FDs per process
     setrlimit nofile 32768 32768
 
-    # Create directory to keep ld.config.txt
-    mkdir /dev/linkerconfig 0755
+    # Set up linker config subdirectories based on mount namespaces
+    mkdir /linkerconfig/bootstrap 0755
+    mkdir /linkerconfig/default 0755
+
+    # Disable dm-verity hash prefetching, since it doesn't help performance
+    # Read more in b/136247322
+    write /sys/module/dm_verity/parameters/prefetch_cluster 0
 
     # Generate ld.config.txt for early executed processes
-    exec -- /system/bin/linkerconfig --target /dev/linkerconfig/ld.config.txt
-    chmod 444 /dev/linkerconfig/ld.config.txt
+    exec -- /system/bin/linkerconfig --target /linkerconfig/bootstrap
+    chmod 644 /linkerconfig/bootstrap/ld.config.txt
+    copy /linkerconfig/bootstrap/ld.config.txt /linkerconfig/default/ld.config.txt
+    chmod 644 /linkerconfig/default/ld.config.txt
+
+    # Mount bootstrap linker configuration as current
+    mount none /linkerconfig/bootstrap /linkerconfig bind rec
 
     start ueventd
 
@@ -52,6 +66,9 @@
     # the libraries are available to the processes started after this statement.
     exec_start apexd-bootstrap
 
+    # Generate linker config based on apex mounted in bootstrap namespace
+    update_linker_config
+
     # These must already exist by the time boringssl_self_test32 / boringssl_self_test64 run.
     mkdir /dev/boringssl 0755 root root
     mkdir /dev/boringssl/selftest 0755 root root
@@ -97,15 +114,6 @@
     symlink /proc/self/fd/1 /dev/stdout
     symlink /proc/self/fd/2 /dev/stderr
 
-    symlink /system/bin /bin
-    symlink /system/etc /etc
-
-    # Backward compatibility.
-    symlink /sys/kernel/debug /d
-
-    # Link /vendor to /system/vendor for devices without a vendor partition.
-    symlink /system/vendor /vendor
-
     # Create energy-aware scheduler tuning nodes
     mkdir /dev/stune/foreground
     mkdir /dev/stune/background
@@ -127,6 +135,14 @@
     chmod 0664 /dev/stune/top-app/tasks
     chmod 0664 /dev/stune/rt/tasks
 
+    # Create an stune group for NNAPI HAL processes
+    mkdir /dev/stune/nnapi-hal
+    chown system system /dev/stune/nnapi-hal
+    chown system system /dev/stune/nnapi-hal/tasks
+    chmod 0664 /dev/stune/nnapi-hal/tasks
+    write /dev/stune/nnapi-hal/schedtune.boost 1
+    write /dev/stune/nnapi-hal/schedtune.prefer_idle 1
+
     # Create blkio group and apply initial settings.
     # This feature needs kernel to support it, and the
     # device's init.rc must actually set the correct values.
@@ -148,11 +164,24 @@
     chmod 0770 /config/sdcardfs
     chown system package_info /config/sdcardfs
 
+    # Mount binderfs
+    mkdir /dev/binderfs
+    mount binder binder /dev/binderfs stats=global
+    chmod 0755 /dev/binderfs
+
+    symlink /dev/binderfs/binder /dev/binder
+    symlink /dev/binderfs/hwbinder /dev/hwbinder
+    symlink /dev/binderfs/vndbinder /dev/vndbinder
+
+    chmod 0666 /dev/binderfs/hwbinder
+    chmod 0666 /dev/binderfs/binder
+    chmod 0666 /dev/binderfs/vndbinder
+
     mkdir /mnt/secure 0700 root root
     mkdir /mnt/secure/asec 0700 root root
     mkdir /mnt/asec 0755 root system
     mkdir /mnt/obb 0755 root system
-    mkdir /mnt/media_rw 0750 root media_rw
+    mkdir /mnt/media_rw 0750 root external_storage
     mkdir /mnt/user 0755 root root
     mkdir /mnt/user/0 0755 root root
     mkdir /mnt/user/0/self 0755 root root
@@ -160,11 +189,11 @@
     mkdir /mnt/user/0/emulated/0 0755 root root
 
     # Prepare directories for pass through processes
-    mkdir /mnt/pass_through 0755 root root
-    mkdir /mnt/pass_through/0 0755 root root
-    mkdir /mnt/pass_through/0/self 0755 root root
-    mkdir /mnt/pass_through/0/emulated 0755 root root
-    mkdir /mnt/pass_through/0/emulated/0 0755 root root
+    mkdir /mnt/pass_through 0700 root root
+    mkdir /mnt/pass_through/0 0710 root media_rw
+    mkdir /mnt/pass_through/0/self 0710 root media_rw
+    mkdir /mnt/pass_through/0/emulated 0710 root media_rw
+    mkdir /mnt/pass_through/0/emulated/0 0710 root media_rw
 
     mkdir /mnt/expand 0771 system system
     mkdir /mnt/appfuse 0711 root root
@@ -181,7 +210,6 @@
     mkdir /mnt/runtime/full/self 0755 root root
 
     # Symlink to keep legacy apps working in multi-user world
-    symlink /storage/self/primary /sdcard
     symlink /storage/self/primary /mnt/sdcard
     symlink /mnt/user/0/primary /mnt/runtime/default/self/primary
 
@@ -283,6 +311,16 @@
     chmod 0664 /dev/cpuset/restricted/tasks
     chmod 0664 /dev/cpuset/tasks
 
+    # freezer cgroup entries
+    mkdir /dev/freezer/frozen
+    write /dev/freezer/frozen/freezer.state FROZEN
+    chown system system /dev/freezer/cgroup.procs
+    chown system system /dev/freezer/frozen
+    chown system system /dev/freezer/frozen/freezer.state
+    chown system system /dev/freezer/frozen/cgroup.procs
+
+    chmod 0444 /dev/freezer/frozen/freezer.state
+
     # make the PSI monitor accessible to others
     chown system system /proc/pressure/memory
     chmod 0664 /proc/pressure/memory
@@ -347,6 +385,8 @@
 
     # Start logd before any other services run to ensure we capture all of their logs.
     start logd
+    # Start lmkd before any other services run so that it can register them
+    start lmkd
 
     # Start essential services.
     start servicemanager
@@ -464,6 +504,7 @@
 on late-fs
     # Ensure that tracefs has the correct permissions.
     # This does not work correctly if it is called in post-fs.
+    chmod 0755 /sys/kernel/tracing
     chmod 0755 /sys/kernel/debug/tracing
 
     # HALs required before storage encryption can get unlocked (FBE/FDE)
@@ -486,26 +527,26 @@
 
     # Start bootcharting as soon as possible after the data partition is
     # mounted to collect more data.
-    mkdir /data/bootchart 0755 shell shell
+    mkdir /data/bootchart 0755 shell shell encryption=Require
     bootchart start
 
     # Make sure that apexd is started in the default namespace
     enter_default_mount_ns
 
     # /data/apex is now available. Start apexd to scan and activate APEXes.
-    mkdir /data/apex 0750 root system
+    mkdir /data/apex 0750 root system encryption=None
     mkdir /data/apex/active 0750 root system
     mkdir /data/apex/backup 0700 root system
     mkdir /data/apex/hashtree 0700 root system
     mkdir /data/apex/sessions 0700 root system
-    mkdir /data/app-staging 0750 system system
+    mkdir /data/app-staging 0750 system system encryption=None
     start apexd
 
     # Avoid predictable entropy pool. Carry over entropy from previous boot.
     copy /data/system/entropy.dat /dev/urandom
 
     # create basic filesystem structure
-    mkdir /data/misc 01771 system misc
+    mkdir /data/misc 01771 system misc encryption=Require
     mkdir /data/misc/recovery 0770 system log
     copy /data/misc/recovery/ro.build.fingerprint /data/misc/recovery/ro.build.fingerprint.1
     chmod 0440 /data/misc/recovery/ro.build.fingerprint.1
@@ -526,6 +567,7 @@
     chown bluetooth bluetooth /data/misc/bluedroid/bt_config.conf
     mkdir /data/misc/bluetooth 0770 bluetooth bluetooth
     mkdir /data/misc/bluetooth/logs 0770 bluetooth bluetooth
+    mkdir /data/misc/credstore 0700 credstore credstore
     mkdir /data/misc/keystore 0700 keystore keystore
     mkdir /data/misc/gatekeeper 0700 system system
     mkdir /data/misc/keychain 0771 system system
@@ -534,6 +576,7 @@
     mkdir /data/misc/sms 0770 system radio
     mkdir /data/misc/carrierid 0770 system radio
     mkdir /data/misc/apns 0770 system radio
+    mkdir /data/misc/emergencynumberdb 0770 system radio
     mkdir /data/misc/zoneinfo 0775 system system
     mkdir /data/misc/network_watchlist 0774 system system
     mkdir /data/misc/textclassifier 0771 system system
@@ -548,7 +591,7 @@
     mkdir /data/misc/user 0771 root root
     # give system access to wpa_supplicant.conf for backup and restore
     chmod 0660 /data/misc/wifi/wpa_supplicant.conf
-    mkdir /data/local 0751 root root
+    mkdir /data/local 0751 root root encryption=Require
     mkdir /data/misc/media 0700 media media
     mkdir /data/misc/audioserver 0700 audioserver audioserver
     mkdir /data/misc/cameraserver 0700 cameraserver cameraserver
@@ -562,101 +605,147 @@
     # profile file layout
     mkdir /data/misc/profiles 0771 system system
     mkdir /data/misc/profiles/cur 0771 system system
-    mkdir /data/misc/profiles/ref 0771 system system
+    mkdir /data/misc/profiles/ref 0770 system system
     mkdir /data/misc/profman 0770 system shell
     mkdir /data/misc/gcov 0770 root root
     mkdir /data/misc/installd 0700 root root
+    mkdir /data/misc/apexdata 0711 root root
+    mkdir /data/misc/apexrollback 0700 root root
+    mkdir /data/misc/snapshotctl_log 0770 root root
+    # create location to store pre-reboot information
+    mkdir /data/misc/prereboot 0700 system system
 
-    mkdir /data/preloads 0775 system system
+    mkdir /data/preloads 0775 system system encryption=None
 
-    mkdir /data/vendor 0771 root root
-    mkdir /data/vendor_ce 0771 root root
-    mkdir /data/vendor_de 0771 root root
+    mkdir /data/vendor 0771 root root encryption=Require
+    mkdir /data/vendor_ce 0771 root root encryption=None
+    mkdir /data/vendor_de 0771 root root encryption=None
     mkdir /data/vendor/hardware 0771 root root
 
     # For security reasons, /data/local/tmp should always be empty.
     # Do not place files or directories in /data/local/tmp
     mkdir /data/local/tmp 0771 shell shell
     mkdir /data/local/traces 0777 shell shell
-    mkdir /data/data 0771 system system
-    mkdir /data/app-private 0771 system system
-    mkdir /data/app-ephemeral 0771 system system
-    mkdir /data/app-asec 0700 root root
-    mkdir /data/app-lib 0771 system system
-    mkdir /data/app 0771 system system
-    mkdir /data/property 0700 root root
-    mkdir /data/tombstones 0771 system system
+    mkdir /data/data 0771 system system encryption=None
+    mkdir /data/app-private 0771 system system encryption=Require
+    mkdir /data/app-ephemeral 0771 system system encryption=Require
+    mkdir /data/app-asec 0700 root root encryption=Require
+    mkdir /data/app-lib 0771 system system encryption=Require
+    mkdir /data/app 0771 system system encryption=Require
+    mkdir /data/property 0700 root root encryption=Require
+    mkdir /data/tombstones 0771 system system encryption=Require
     mkdir /data/vendor/tombstones 0771 root root
     mkdir /data/vendor/tombstones/wifi 0771 wifi wifi
 
     # create dalvik-cache, so as to enforce our permissions
-    mkdir /data/dalvik-cache 0771 root root
+    mkdir /data/dalvik-cache 0771 root root encryption=Require
     # create the A/B OTA directory, so as to enforce our permissions
-    mkdir /data/ota 0771 root root
+    mkdir /data/ota 0771 root root encryption=Require
 
     # create the OTA package directory. It will be accessed by GmsCore (cache
     # group), update_engine and update_verifier.
-    mkdir /data/ota_package 0770 system cache
+    mkdir /data/ota_package 0770 system cache encryption=Require
 
     # create resource-cache and double-check the perms
-    mkdir /data/resource-cache 0771 system system
+    mkdir /data/resource-cache 0771 system system encryption=Require
     chown system system /data/resource-cache
     chmod 0771 /data/resource-cache
 
     # create the lost+found directories, so as to enforce our permissions
-    mkdir /data/lost+found 0770 root root
+    mkdir /data/lost+found 0770 root root encryption=None
 
     # create directory for DRM plug-ins - give drm the read/write access to
     # the following directory.
-    mkdir /data/drm 0770 drm drm
+    mkdir /data/drm 0770 drm drm encryption=Require
 
     # create directory for MediaDrm plug-ins - give drm the read/write access to
     # the following directory.
-    mkdir /data/mediadrm 0770 mediadrm mediadrm
+    mkdir /data/mediadrm 0770 mediadrm mediadrm encryption=Require
 
-    mkdir /data/anr 0775 system system
+    mkdir /data/anr 0775 system system encryption=Require
 
     # NFC: create data/nfc for nv storage
-    mkdir /data/nfc 0770 nfc nfc
+    mkdir /data/nfc 0770 nfc nfc encryption=Require
     mkdir /data/nfc/param 0770 nfc nfc
 
     # Create all remaining /data root dirs so that they are made through init
     # and get proper encryption policy installed
-    mkdir /data/backup 0700 system system
-    mkdir /data/ss 0700 system system
+    mkdir /data/backup 0700 system system encryption=Require
+    mkdir /data/ss 0700 system system encryption=Require
 
-    mkdir /data/system 0775 system system
+    mkdir /data/system 0775 system system encryption=Require
     mkdir /data/system/dropbox 0700 system system
     mkdir /data/system/heapdump 0700 system system
     mkdir /data/system/users 0775 system system
 
-    mkdir /data/system_de 0770 system system
-    mkdir /data/system_ce 0770 system system
+    mkdir /data/system_de 0770 system system encryption=None
+    mkdir /data/system_ce 0770 system system encryption=None
 
-    mkdir /data/misc_de 01771 system misc
-    mkdir /data/misc_ce 01771 system misc
+    mkdir /data/misc_de 01771 system misc encryption=None
+    mkdir /data/misc_ce 01771 system misc encryption=None
 
-    mkdir /data/user 0711 system system
-    mkdir /data/user_de 0711 system system
-    symlink /data/data /data/user/0
+    mkdir /data/user 0711 system system encryption=None
+    mkdir /data/user_de 0711 system system encryption=None
 
-    mkdir /data/media 0770 media_rw media_rw
-    mkdir /data/media/obb 0770 media_rw media_rw
+    # Unlink /data/user/0 if we previously symlink it to /data/data
+    rm /data/user/0
 
-    mkdir /data/cache 0770 system cache
+    # Bind mount /data/user/0 to /data/data
+    mkdir /data/user/0 0700 system system encryption=None
+    mount none /data/data /data/user/0 bind rec
+
+    # A tmpfs directory, which will contain all apps CE DE data directory that
+    # bind mount from the original source.
+    chown root root /data_mirror
+    chmod 0700 /data_mirror
+    mount tmpfs tmpfs /data_mirror mode=0700,uid=0,gid=1000 nodev noexec nosuid
+    restorecon /data_mirror
+    mkdir /data_mirror/data_ce 0700 root root
+    mkdir /data_mirror/data_de 0700 root root
+
+    # Create CE and DE data directory for default volume
+    mkdir /data_mirror/data_ce/null 0700 root root
+    mkdir /data_mirror/data_de/null 0700 root root
+
+    # Bind mount CE and DE data directory to mirror's default volume directory
+    mount none /data/user /data_mirror/data_ce/null bind rec
+    mount none /data/user_de /data_mirror/data_de/null bind rec
+
+    # Create mirror directory for jit profiles
+    mkdir /data_mirror/cur_profiles 0700 root root
+    mount none /data/misc/profiles/cur /data_mirror/cur_profiles bind rec
+
+    mkdir /data/cache 0770 system cache encryption=Require
     mkdir /data/cache/recovery 0770 system cache
     mkdir /data/cache/backup_stage 0700 system system
     mkdir /data/cache/backup 0700 system system
 
-    mkdir /data/rollback 0700 system system
-    mkdir /data/rollback-observer 0700 system system
+    # Delete these if need be, per b/139193659
+    mkdir /data/rollback 0700 system system encryption=DeleteIfNecessary
+    mkdir /data/rollback-observer 0700 system system encryption=DeleteIfNecessary
+
+    # Create root dir for Incremental Service
+    mkdir /data/incremental 0771 system system encryption=Require
 
     # Wait for apexd to finish activating APEXes before starting more processes.
     wait_for_prop apexd.status ready
-    parse_apex_configs
+    perform_apex_config
+
+    # Special-case /data/media/obb per b/64566063
+    mkdir /data/media 0770 media_rw media_rw encryption=None
+    exec - media_rw media_rw -- /system/bin/chattr +F /data/media
+    mkdir /data/media/obb 0770 media_rw media_rw encryption=Attempt
+
+    exec_start derive_sdk
 
     init_user0
 
+    # Allow apexd to snapshot and restore device encrypted apex data in the case
+    # of a rollback. This should be done immediately after DE_user data keys
+    # are loaded. APEXes should not access this data until this has been
+    # completed.
+    exec_start apexd-snapshotde
+
     # Set SELinux security contexts on upgrade or policy update.
     restorecon --recursive --skip-ce /data
 
@@ -686,8 +775,6 @@
   # Mount default storage into root namespace
   mount none /mnt/user/0 /storage bind rec
   mount none none /storage slave rec
-  # Bootstrap the emulated volume for the pass_through directory for user 0
-  mount none /data/media /mnt/pass_through/0/emulated bind rec
 on zygote-start && property:persist.sys.fuse=false
   # Mount default storage into root namespace
   mount none /mnt/runtime/default /storage bind rec
@@ -754,6 +841,12 @@
     # to make it too large, since it may bring userdata loss, if they
     # are not aware of using fsync()/sync() to prepare sudden power-cut.
     write /sys/fs/f2fs/${dev.mnt.blk.data}/cp_interval 200
+    write /sys/fs/f2fs/${dev.mnt.blk.data}/gc_urgent_sleep_time 50
+
+    # limit discard size to 128MB in order to avoid long IO latency
+    # for filesystem tuning first (dm or sda)
+    # Note that, if dm-<num> is used, sda/mmcblk0 should be tuned in vendor/init.rc
+    write /sys/devices/virtual/block/${dev.mnt.blk.data}/queue/discard_max_bytes 134217728
 
     # Permissions for System Server and daemons.
     chown system system /sys/power/autosleep
@@ -866,7 +959,7 @@
     bootchart stop
     # Setup per_boot directory so other .rc could start to use it on boot_completed
     exec - system system -- /bin/rm -rf /data/per_boot
-    mkdir /data/per_boot 0700 system system
+    mkdir /data/per_boot 0700 system system encryption=Require key=per_boot_ref
 
 # system server cannot write to /proc/sys files,
 # and chown/chmod does not work for /proc/sys/ entries.
@@ -878,14 +971,33 @@
 on property:sys.sysctl.tcp_def_init_rwnd=*
     write /proc/sys/net/ipv4/tcp_default_init_rwnd ${sys.sysctl.tcp_def_init_rwnd}
 
-on property:security.perf_harden=0
+# perf_event_open syscall security:
+# Newer kernels have the ability to control the use of the syscall via SELinux
+# hooks. init tests for this, and sets sys_init.perf_lsm_hooks to 1 if the
+# kernel has the hooks. In this case, the system-wide perf_event_paranoid
+# sysctl is set to -1 (unrestricted use), and the SELinux policy is used for
+# controlling access. On older kernels, the paranoid value is the only means of
+# controlling access. It is normally 3 (allow only root), but the shell user
+# can lower it to 1 (allowing thread-scoped pofiling) via security.perf_harden.
+on property:sys.init.perf_lsm_hooks=1
+    write /proc/sys/kernel/perf_event_paranoid -1
+on property:security.perf_harden=0 && property:sys.init.perf_lsm_hooks=""
     write /proc/sys/kernel/perf_event_paranoid 1
+on property:security.perf_harden=1 && property:sys.init.perf_lsm_hooks=""
+    write /proc/sys/kernel/perf_event_paranoid 3
+
+# Additionally, simpleperf profiler uses debug.* and security.perf_harden
+# sysprops to be able to indirectly set these sysctls.
+on property:security.perf_harden=0
     write /proc/sys/kernel/perf_event_max_sample_rate ${debug.perf_event_max_sample_rate:-100000}
     write /proc/sys/kernel/perf_cpu_time_max_percent ${debug.perf_cpu_time_max_percent:-25}
     write /proc/sys/kernel/perf_event_mlock_kb ${debug.perf_event_mlock_kb:-516}
-
+# Default values.
 on property:security.perf_harden=1
-    write /proc/sys/kernel/perf_event_paranoid 3
+    write /proc/sys/kernel/perf_event_max_sample_rate 100000
+    write /proc/sys/kernel/perf_cpu_time_max_percent 25
+    write /proc/sys/kernel/perf_event_mlock_kb 516
+
 
 # on shutdown
 # In device's init.rc, this trigger can be used to do device-specific actions
@@ -918,17 +1030,33 @@
 on init && property:ro.debuggable=1
     start console
 
-on userspace-reboot
+on userspace-reboot-requested
   # TODO(b/135984674): reset all necessary properties here.
-  setprop sys.init.userspace_reboot_in_progress 1
-  setprop sys.boot_completed 0
-  setprop sys.init.updatable_crashing 0
-  setprop apexd.status 0
+  setprop sys.boot_completed ""
+  setprop dev.bootcomplete ""
+  setprop sys.init.updatable_crashing ""
+  setprop sys.init.updatable_crashing_process_name ""
+  setprop apexd.status ""
+  setprop sys.user.0.ce_available ""
+  setprop sys.shutdown.requested ""
+  setprop service.bootanim.exit ""
+
+on userspace-reboot-fs-remount
+  # Make sure that vold is running.
+  # This is mostly a precaution measure in case vold for some reason wasn't running when
+  # userspace reboot was initiated.
+  start vold
+  exec - system system -- /system/bin/vdc checkpoint resetCheckpoint
+  exec - system system -- /system/bin/vdc checkpoint markBootAttempt
+  remount_userdata
+  start bootanim
 
 on userspace-reboot-resume
-  # TODO(b/135984674): remount userdata and reset checkpointing
-  trigger nonencrypted
+  trigger userspace-reboot-fs-remount
   trigger post-fs-data
   trigger zygote-start
   trigger early-boot
   trigger boot
+
+on property:sys.boot_completed=1 && property:sys.init.userspace_reboot.in_progress=1
+  setprop sys.init.userspace_reboot.in_progress ""
diff --git a/rootdir/init.usb.rc b/rootdir/init.usb.rc
index b6cba90..27b05ec 100644
--- a/rootdir/init.usb.rc
+++ b/rootdir/init.usb.rc
@@ -9,16 +9,19 @@
     chown system system /sys/class/android_usb/android0/f_rndis/ethaddr
     chmod 0660 /sys/class/android_usb/android0/f_rndis/ethaddr
     mkdir /data/misc/adb 02750 system shell
-    mkdir /data/adb 0700 root root
+    mkdir /data/adb 0700 root root encryption=Require
 
 # adbd is controlled via property triggers in init.<platform>.usb.rc
 service adbd /system/bin/adbd --root_seclabel=u:r:su:s0
     class core
     socket adbd seqpacket 660 system system
     disabled
+    updatable
     seclabel u:r:adbd:s0
 
-on boot
+# Set default value on sys.usb.configfs early in boot sequence. It will be
+# overridden in `on boot` action of init.hardware.rc.
+on init
     setprop sys.usb.configfs 0
 
 # Used to disable USB when switching states
@@ -132,3 +135,7 @@
 on property:sys.usb.typec.power_role=sink
     write /sys/class/dual_role_usb/otg_default/power_role ${sys.usb.typec.power_role}
     setprop sys.usb.typec.state ${sys.usb.typec.power_role}
+
+on userspace-reboot-requested
+  setprop sys.usb.config ""
+  setprop sys.usb.state ""
diff --git a/rootdir/ld_config_backward_compatibility_check.py b/rootdir/ld_config_backward_compatibility_check.py
deleted file mode 100755
index 1a27578..0000000
--- a/rootdir/ld_config_backward_compatibility_check.py
+++ /dev/null
@@ -1,177 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright (C) 2018 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-import glob
-import os.path
-import re
-import sys
-
-PREBUILTS_VNDK_DIR = "prebuilts/vndk"
-VENDOR_DIRECTORIES = ('/vendor', '/odm')
-
-def find_latest_vndk_snapshot_version():
-  """Returns latest vndk snapshot version in current source tree.
-  It will skip the test if the snapshot directories are not found.
-
-  Returns:
-    latest_version: string
-  """
-  vndk_dir_list = glob.glob(PREBUILTS_VNDK_DIR + "/v*")
-  if not vndk_dir_list:
-    """Exit without error because we may have source trees that do not include
-    VNDK snapshot directories in it.
-    """
-    sys.exit(0)
-  vndk_ver_list = [re.match(r".*/v(\d+)", vndk_dir).group(1)
-                                          for vndk_dir in vndk_dir_list]
-  latest_version = max(vndk_ver_list)
-  if latest_version == '27':
-    """Exit without error because VNDK v27 is not using ld.config.txt template
-    """
-    sys.exit(0)
-  return latest_version
-
-def get_vendor_configuration(ld_config_file):
-  """Reads the ld.config.txt file to parse the namespace configurations.
-  It finds the configurations that include vendor directories.
-
-  Args:
-    ld_config_file: string, path (relative to build top) of the ld.config.txt
-                    file.
-  Returns:
-    configs: dict{string:[string]}, dictionary of namespace configurations.
-             it has 'section + property' names as keys and the directory list
-             as values.
-  """
-  try:
-    conf_file = open(ld_config_file)
-  except IOError:
-    print("error: could not read %s" % ld_config_file)
-    sys.exit(1)
-
-  configs = dict()
-  current_section = None
-
-  with conf_file:
-    for line in conf_file:
-      # ignore comments
-      found = line.find('#')
-      if found != -1:
-        line = line[:found]
-      line = line.strip()
-      if not line:
-        continue
-
-      if line[0] == '[' and line[-1] == ']':
-        # new section started
-        current_section = line[1:-1]
-        continue
-
-      if current_section == None:
-        continue
-
-      found = line.find('+=')
-      opr_len = 2
-      if found == -1:
-        found = line.find('=')
-        opr_len = 1
-      if found == -1:
-        continue
-
-      namespace = line[:found].strip()
-      if not namespace.endswith(".paths"):
-        # check ".paths" only
-        continue
-      namespace = '[' + current_section + ']' + namespace
-      values = line[found + opr_len:].strip()
-      directories = values.split(':')
-
-      for directory in directories:
-        if any(vendor_dir in directory for vendor_dir in VENDOR_DIRECTORIES):
-          if namespace in configs:
-            configs[namespace].append(directory)
-          else:
-            configs[namespace] = [directory]
-
-  return configs
-
-def get_snapshot_config(version):
-  """Finds the ld.config.{version}.txt file from the VNDK snapshot directory.
-  In the vndk prebuilt directory (prebuilts/vndk/v{version}), it searches
-  {arch}/configs/ld.config.{version}.txt file, where {arch} is one of ('arm64',
-  'arm', 'x86_64', 'x86').
-
-  Args:
-    version: string, the VNDK snapshot version to search.
-  Returns:
-    ld_config_file: string, relative path to ld.config.{version}.txt
-  """
-  arch_list = ('arm64', 'arm', 'x86_64', 'x86')
-  for arch in arch_list:
-    ld_config_file = (PREBUILTS_VNDK_DIR
-                + "/v{0}/{1}/configs/ld.config.{0}.txt".format(version, arch))
-    if os.path.isfile(ld_config_file):
-      return ld_config_file
-  print("error: cannot find ld.config.{0}.txt file in snapshot v{0}"
-                                                        .format(version))
-  sys.exit(1)
-
-def check_backward_compatibility(ld_config, vndk_snapshot_version):
-  """Checks backward compatibility for current ld.config.txt file with the
-  old ld.config.txt file. If any of the vendor directories in the old namespace
-  configurations are missing, the test will fail. It is allowed to have new
-  vendor directories in current ld.config.txt file.
-
-  Args:
-    ld_config: string, relative path to current ld.config.txt file.
-    vndk_snapshot_version: string, the VNDK snapshot version that has an old
-                           ld.config.txt file to compare.
-  Returns:
-    result: bool, True if the current configuration is backward compatible.
-  """
-  current_config = get_vendor_configuration(ld_config)
-  old_config = get_vendor_configuration(
-                                get_snapshot_config(vndk_snapshot_version))
-  for namespace in old_config:
-    if namespace not in current_config:
-      print("error: cannot find %s which was provided in ld.config.%s.txt"
-                                        % (namespace, vndk_snapshot_version))
-      return False
-    for path in old_config[namespace]:
-      if not path in current_config[namespace]:
-        print("error: %s for %s in ld.config.%s.txt are missing in %s"
-                % (path, namespace, vndk_snapshot_version, ld_config))
-        return False
-  return True
-
-def main():
-  if len(sys.argv) != 2:
-    print ("Usage: %s target_ld_config_txt_file_name" % sys.argv[0])
-    sys.exit(1)
-
-  latest_vndk_snapshot_version = find_latest_vndk_snapshot_version()
-  if not check_backward_compatibility(sys.argv[1],
-                                          latest_vndk_snapshot_version):
-    print("error: %s has backward incompatible changes to old "
-          "vendor partition." % sys.argv[1])
-    sys.exit(1)
-
-  # Current ld.config.txt file is backward compatible
-  sys.exit(0)
-
-if __name__ == '__main__':
-  main()
diff --git a/rootdir/update_and_install_ld_config.mk b/rootdir/update_and_install_ld_config.mk
deleted file mode 100644
index 44f7b65..0000000
--- a/rootdir/update_and_install_ld_config.mk
+++ /dev/null
@@ -1,207 +0,0 @@
-#####################################################################
-# Builds linker config file, ld.config.txt, from the specified template
-# under $(LOCAL_PATH)/etc/*.
-#
-# Inputs:
-#   (expected to follow an include of $(BUILD_SYSTEM)/base_rules.mk)
-#   ld_config_template: template linker config file to use,
-#                       e.g. $(LOCAL_PATH)/etc/ld.config.txt
-#   vndk_version: version of the VNDK library lists used to update the
-#                 template linker config file, e.g. 28
-#   lib_list_from_prebuilts: should be set to 'true' if the VNDK library
-#                            lists should be read from /prebuilts/vndk/*
-#   libz_is_llndk: should be set to 'true' if libz must be included in
-#                  llndk and not in vndk-sp
-# Outputs:
-#   Builds and installs ld.config.$VER.txt or ld.config.vndk_lite.txt
-#####################################################################
-
-# Read inputs
-ld_config_template := $(strip $(ld_config_template))
-check_backward_compatibility := $(strip $(check_backward_compatibility))
-vndk_version := $(strip $(vndk_version))
-lib_list_from_prebuilts := $(strip $(lib_list_from_prebuilts))
-libz_is_llndk := $(strip $(libz_is_llndk))
-
-my_vndk_use_core_variant := $(TARGET_VNDK_USE_CORE_VARIANT)
-ifeq ($(lib_list_from_prebuilts),true)
-my_vndk_use_core_variant := false
-endif
-
-compatibility_check_script := \
-  $(LOCAL_PATH)/ld_config_backward_compatibility_check.py
-intermediates_dir := $(call intermediates-dir-for,ETC,$(LOCAL_MODULE))
-library_lists_dir := $(intermediates_dir)
-ifeq ($(lib_list_from_prebuilts),true)
-  library_lists_dir := prebuilts/vndk/v$(vndk_version)/$(TARGET_ARCH)/configs
-endif
-
-llndk_libraries_file := $(library_lists_dir)/llndk.libraries.$(vndk_version).txt
-vndksp_libraries_file := $(library_lists_dir)/vndksp.libraries.$(vndk_version).txt
-vndkcore_libraries_file := $(library_lists_dir)/vndkcore.libraries.$(vndk_version).txt
-vndkprivate_libraries_file := $(library_lists_dir)/vndkprivate.libraries.$(vndk_version).txt
-llndk_moved_to_apex_libraries_file := $(library_lists_dir)/llndkinapex.libraries.txt
-ifeq ($(my_vndk_use_core_variant),true)
-vndk_using_core_variant_libraries_file := $(library_lists_dir)/vndk_using_core_variant.libraries.$(vndk_version).txt
-endif
-
-sanitizer_runtime_libraries := $(call normalize-path-list,$(addsuffix .so,\
-  $(ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
-  $(HWADDRESS_SANITIZER_RUNTIME_LIBRARY) \
-  $(UBSAN_RUNTIME_LIBRARY) \
-  $(TSAN_RUNTIME_LIBRARY) \
-  $(2ND_ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
-  $(2ND_HWADDRESS_SANITIZER_RUNTIME_LIBRARY) \
-  $(2ND_UBSAN_RUNTIME_LIBRARY) \
-  $(2ND_TSAN_RUNTIME_LIBRARY)))
-# If BOARD_VNDK_VERSION is not defined, VNDK version suffix will not be used.
-vndk_version_suffix := $(if $(vndk_version),-$(vndk_version))
-
-ifneq ($(lib_list_from_prebuilts),true)
-ifeq ($(libz_is_llndk),true)
-  llndk_libraries_list := $(LLNDK_LIBRARIES) libz
-  vndksp_libraries_list := $(filter-out libz,$(VNDK_SAMEPROCESS_LIBRARIES))
-else
-  llndk_libraries_list := $(LLNDK_LIBRARIES)
-  vndksp_libraries_list := $(VNDK_SAMEPROCESS_LIBRARIES)
-endif
-
-# LLNDK libraries that has been moved to an apex package and no longer are present on
-# /system image.
-llndk_libraries_moved_to_apex_list:=$(LLNDK_MOVED_TO_APEX_LIBRARIES)
-
-# Returns the unique installed basenames of a module, or module.so if there are
-# none.  The guess is to handle cases like libc, where the module itself is
-# marked uninstallable but a symlink is installed with the name libc.so.
-# $(1): list of libraries
-# $(2): suffix to to add to each library (not used for guess)
-define module-installed-files-or-guess
-$(foreach lib,$(1),$(or $(strip $(sort $(notdir $(call module-installed-files,$(lib)$(2))))),$(lib).so))
-endef
-
-# $(1): list of libraries
-# $(2): suffix to add to each library
-# $(3): output file to write the list of libraries to
-define write-libs-to-file
-$(3): PRIVATE_LIBRARIES := $(1)
-$(3): PRIVATE_SUFFIX := $(2)
-$(3):
-	echo -n > $$@ && $$(foreach so,$$(call module-installed-files-or-guess,$$(PRIVATE_LIBRARIES),$$(PRIVATE_SUFFIX)),echo $$(so) >> $$@;)
-endef
-$(eval $(call write-libs-to-file,$(llndk_libraries_list),,$(llndk_libraries_file)))
-$(eval $(call write-libs-to-file,$(vndksp_libraries_list),.vendor,$(vndksp_libraries_file)))
-$(eval $(call write-libs-to-file,$(VNDK_CORE_LIBRARIES),.vendor,$(vndkcore_libraries_file)))
-$(eval $(call write-libs-to-file,$(VNDK_PRIVATE_LIBRARIES),.vendor,$(vndkprivate_libraries_file)))
-ifeq ($(my_vndk_use_core_variant),true)
-$(eval $(call write-libs-to-file,$(VNDK_USING_CORE_VARIANT_LIBRARIES),,$(vndk_using_core_variant_libraries_file)))
-endif
-endif # ifneq ($(lib_list_from_prebuilts),true)
-
-# Given a file with a list of libs, filter-out the VNDK private libraries
-# and write resulting list to a new file in "a:b:c" format
-#
-# $(1): libs file from which to filter-out VNDK private libraries
-# $(2): output file with the filtered list of lib names
-$(LOCAL_BUILT_MODULE): private-filter-out-private-libs = \
-  paste -sd ":" $(1) > $(2) && \
-  while read -r privatelib; do sed -i.bak "s/$$privatelib//" $(2) ; done < $(PRIVATE_VNDK_PRIVATE_LIBRARIES_FILE) && \
-  sed -i.bak -e 's/::\+/:/g ; s/^:\+// ; s/:\+$$//' $(2) && \
-  rm -f $(2).bak
-
-# # Given a file with a list of libs in "a:b:c" format, filter-out the LLNDK libraries migrated into apex file
-# # and write resulting list to a new file in "a:b:c" format
- $(LOCAL_BUILT_MODULE): private-filter-out-llndk-in-apex-libs = \
-   for lib in $(PRIVATE_LLNDK_LIBRARIES_MOVED_TO_APEX_LIST); do sed -i.bak s/$$lib.so// $(1); done && \
-   sed -i.bak -e 's/::\+/:/g ; s/^:\+// ; s/:\+$$//' $(1) && \
-   rm -f $(1).bak
-
-$(LOCAL_BUILT_MODULE): PRIVATE_LLNDK_LIBRARIES_FILE := $(llndk_libraries_file)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_SP_LIBRARIES_FILE := $(vndksp_libraries_file)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_CORE_LIBRARIES_FILE := $(vndkcore_libraries_file)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_PRIVATE_LIBRARIES_FILE := $(vndkprivate_libraries_file)
-$(LOCAL_BUILT_MODULE): PRIVATE_SANITIZER_RUNTIME_LIBRARIES := $(sanitizer_runtime_libraries)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_VERSION_SUFFIX := $(vndk_version_suffix)
-$(LOCAL_BUILT_MODULE): PRIVATE_INTERMEDIATES_DIR := $(intermediates_dir)
-$(LOCAL_BUILT_MODULE): PRIVATE_COMP_CHECK_SCRIPT := $(compatibility_check_script)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_VERSION_TAG := \#VNDK$(vndk_version)\#
-$(LOCAL_BUILT_MODULE): PRIVATE_LLNDK_LIBRARIES_MOVED_TO_APEX_LIST := $(llndk_libraries_moved_to_apex_list)
-deps := $(llndk_libraries_file) $(vndksp_libraries_file) $(vndkcore_libraries_file) \
-  $(vndkprivate_libraries_file)
-ifeq ($(check_backward_compatibility),true)
-deps += $(compatibility_check_script) $(wildcard prebuilts/vndk/*/*/configs/ld.config.*.txt)
-endif
-ifeq ($(my_vndk_use_core_variant),true)
-$(LOCAL_BUILT_MODULE): PRIVATE_VNDK_USING_CORE_VARIANT_LIBRARIES_FILE := $(vndk_using_core_variant_libraries_file)
-deps += $(vndk_using_core_variant_libraries_file)
-endif
-
-$(LOCAL_BUILT_MODULE): $(ld_config_template) $(deps)
-	@echo "Generate: $< -> $@"
-ifeq ($(check_backward_compatibility),true)
-	@echo "Checking backward compatibility..."
-	$(hide) $(PRIVATE_COMP_CHECK_SCRIPT) $<
-endif
-	@mkdir -p $(dir $@)
-	$(call private-filter-out-private-libs,$(PRIVATE_LLNDK_LIBRARIES_FILE),$(PRIVATE_INTERMEDIATES_DIR)/llndk_filtered)
-	$(call private-filter-out-llndk-in-apex-libs,$(PRIVATE_INTERMEDIATES_DIR)/llndk_filtered)
-	$(hide) sed -e "s?%LLNDK_LIBRARIES%?$$(cat $(PRIVATE_INTERMEDIATES_DIR)/llndk_filtered)?g" $< >$@
-	$(call private-filter-out-private-libs,$(PRIVATE_VNDK_SP_LIBRARIES_FILE),$(PRIVATE_INTERMEDIATES_DIR)/vndksp_filtered)
-	$(hide) sed -i.bak -e "s?%VNDK_SAMEPROCESS_LIBRARIES%?$$(cat $(PRIVATE_INTERMEDIATES_DIR)/vndksp_filtered)?g" $@
-	$(call private-filter-out-private-libs,$(PRIVATE_VNDK_CORE_LIBRARIES_FILE),$(PRIVATE_INTERMEDIATES_DIR)/vndkcore_filtered)
-	$(hide) sed -i.bak -e "s?%VNDK_CORE_LIBRARIES%?$$(cat $(PRIVATE_INTERMEDIATES_DIR)/vndkcore_filtered)?g" $@
-
-ifeq ($(my_vndk_use_core_variant),true)
-	$(call private-filter-out-private-libs,$(PRIVATE_VNDK_USING_CORE_VARIANT_LIBRARIES_FILE),$(PRIVATE_INTERMEDIATES_DIR)/vndk_using_core_variant_filtered)
-	$(hide) sed -i.bak -e "s?%VNDK_IN_SYSTEM_NS%?,vndk_in_system?g" $@
-	$(hide) sed -i.bak -e "s?%VNDK_USING_CORE_VARIANT_LIBRARIES%?$$(cat $(PRIVATE_INTERMEDIATES_DIR)/vndk_using_core_variant_filtered)?g" $@
-else
-	$(hide) sed -i.bak -e "s?%VNDK_IN_SYSTEM_NS%??g" $@
-	# Unlike LLNDK or VNDK-SP, VNDK_USING_CORE_VARIANT_LIBRARIES can be nothing
-	# if TARGET_VNDK_USE_CORE_VARIANT is not set.  In this case, we need to remove
-	# the entire line in the linker config so that we are not left with a line
-	# like:
-	#   namespace.vndk.link.vndk_in_system.shared_libs =
-	$(hide) sed -i.bak -e 's?^.*= %VNDK_USING_CORE_VARIANT_LIBRARIES%$$??' $@
-endif
-
-	$(hide) echo -n > $(PRIVATE_INTERMEDIATES_DIR)/private_llndk && \
-	while read -r privatelib; \
-	do (grep $$privatelib $(PRIVATE_LLNDK_LIBRARIES_FILE) || true) >> $(PRIVATE_INTERMEDIATES_DIR)/private_llndk ; \
-	done < $(PRIVATE_VNDK_PRIVATE_LIBRARIES_FILE) && \
-	paste -sd ":" $(PRIVATE_INTERMEDIATES_DIR)/private_llndk | \
-	sed -i.bak -e "s?%PRIVATE_LLNDK_LIBRARIES%?$$(cat -)?g" $@
-
-	$(hide) sed -i.bak -e "s?%SANITIZER_RUNTIME_LIBRARIES%?$(PRIVATE_SANITIZER_RUNTIME_LIBRARIES)?g" $@
-	$(hide) sed -i.bak -e "s?%VNDK_VER%?$(PRIVATE_VNDK_VERSION_SUFFIX)?g" $@
-	$(hide) sed -i.bak -e "s?%PRODUCT%?$(TARGET_COPY_OUT_PRODUCT)?g" $@
-	$(hide) sed -i.bak -e "s?%SYSTEM_EXT%?$(TARGET_COPY_OUT_SYSTEM_EXT)?g" $@
-	$(hide) sed -i.bak -e "s?^$(PRIVATE_VNDK_VERSION_TAG)??g" $@
-	$(hide) sed -i.bak "/^\#VNDK[0-9]\{2\}\#.*$$/d" $@
-	$(hide) rm -f $@.bak
-
-ld_config_template :=
-check_backward_compatibility :=
-vndk_version :=
-lib_list_from_prebuilts :=
-libz_is_llndk :=
-compatibility_check_script :=
-intermediates_dir :=
-library_lists_dir :=
-llndk_libraries_file :=
-llndk_moved_to_apex_libraries_file :=
-vndksp_libraries_file :=
-vndkcore_libraries_file :=
-vndkprivate_libraries_file :=
-deps :=
-sanitizer_runtime_libraries :=
-vndk_version_suffix :=
-llndk_libraries_list :=
-vndksp_libraries_list :=
-write-libs-to-file :=
-
-ifeq ($(my_vndk_use_core_variant),true)
-vndk_using_core_variant_libraries_file :=
-vndk_using_core_variant_libraries_list :=
-endif
-
-my_vndk_use_core_variant :=
diff --git a/libmemunreachable/.clang-format b/set-verity-state/.clang-format
similarity index 100%
rename from libmemunreachable/.clang-format
rename to set-verity-state/.clang-format
diff --git a/set-verity-state/Android.bp b/set-verity-state/Android.bp
new file mode 100644
index 0000000..da112c9
--- /dev/null
+++ b/set-verity-state/Android.bp
@@ -0,0 +1,25 @@
+// Copyright 2019 The Android Open Source Project
+
+cc_binary {
+    name: "set-verity-state",
+    srcs: ["set-verity-state.cpp"],
+    shared_libs: [
+        "libbase",
+        "libcrypto",
+        "libcrypto_utils",
+        "libcutils",
+        "libfec",
+        "libfs_mgr_binder",
+        "liblog",
+        "libutils",
+    ],
+    static_libs: [
+        "libavb_user",
+    ],
+
+    cflags: ["-Werror"],
+    symlinks: [
+        "enable-verity",
+        "disable-verity",
+    ],
+}
diff --git a/set-verity-state/set-verity-state.cpp b/set-verity-state/set-verity-state.cpp
new file mode 100644
index 0000000..0a26aba
--- /dev/null
+++ b/set-verity-state/set-verity-state.cpp
@@ -0,0 +1,274 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <libavb_user/libavb_user.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <android-base/file.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/stringprintf.h>
+#include <android-base/unique_fd.h>
+#include <fs_mgr.h>
+#include <fs_mgr_overlayfs.h>
+#include <fstab/fstab.h>
+#include <log/log_properties.h>
+
+#include "fec/io.h"
+
+#ifdef ALLOW_DISABLE_VERITY
+static const bool kAllowDisableVerity = true;
+#else
+static const bool kAllowDisableVerity = false;
+#endif
+
+using android::base::unique_fd;
+
+static void suggest_run_adb_root() {
+  if (getuid() != 0) printf("Maybe run adb root?\n");
+}
+
+static bool make_block_device_writable(const std::string& dev) {
+  unique_fd fd(open(dev.c_str(), O_RDONLY | O_CLOEXEC));
+  if (fd == -1) {
+    return false;
+  }
+
+  int OFF = 0;
+  bool result = (ioctl(fd.get(), BLKROSET, &OFF) != -1);
+  return result;
+}
+
+/* Turn verity on/off */
+static bool set_verity_enabled_state(const char* block_device, const char* mount_point,
+                                     bool enable) {
+  if (!make_block_device_writable(block_device)) {
+    printf("Could not make block device %s writable (%s).\n", block_device, strerror(errno));
+    return false;
+  }
+
+  fec::io fh(block_device, O_RDWR);
+
+  if (!fh) {
+    printf("Could not open block device %s (%s).\n", block_device, strerror(errno));
+    suggest_run_adb_root();
+    return false;
+  }
+
+  fec_verity_metadata metadata;
+
+  if (!fh.get_verity_metadata(metadata)) {
+    printf("Couldn't find verity metadata!\n");
+    return false;
+  }
+
+  if (!enable && metadata.disabled) {
+    printf("Verity already disabled on %s\n", mount_point);
+    return false;
+  }
+
+  if (enable && !metadata.disabled) {
+    printf("Verity already enabled on %s\n", mount_point);
+    return false;
+  }
+
+  if (!fh.set_verity_status(enable)) {
+    printf("Could not set verity %s flag on device %s with error %s\n",
+           enable ? "enabled" : "disabled", block_device, strerror(errno));
+    return false;
+  }
+
+  auto change = false;
+  errno = 0;
+  if (enable ? fs_mgr_overlayfs_teardown(mount_point, &change)
+             : fs_mgr_overlayfs_setup(nullptr, mount_point, &change)) {
+    if (change) {
+      printf("%s overlayfs for %s\n", enable ? "disabling" : "using", mount_point);
+    }
+  } else if (errno) {
+    int expected_errno = enable ? EBUSY : ENOENT;
+    if (errno != expected_errno) {
+      printf("Overlayfs %s for %s failed with error %s\n", enable ? "teardown" : "setup",
+             mount_point, strerror(errno));
+    }
+  }
+  printf("Verity %s on %s\n", enable ? "enabled" : "disabled", mount_point);
+  return true;
+}
+
+/* Helper function to get A/B suffix, if any. If the device isn't
+ * using A/B the empty string is returned. Otherwise either "_a",
+ * "_b", ... is returned.
+ */
+static std::string get_ab_suffix() {
+  return android::base::GetProperty("ro.boot.slot_suffix", "");
+}
+
+static bool is_avb_device_locked() {
+  return android::base::GetProperty("ro.boot.vbmeta.device_state", "") == "locked";
+}
+
+static bool overlayfs_setup(bool enable) {
+  auto change = false;
+  errno = 0;
+  if (enable ? fs_mgr_overlayfs_teardown(nullptr, &change)
+             : fs_mgr_overlayfs_setup(nullptr, nullptr, &change)) {
+    if (change) {
+      printf("%s overlayfs\n", enable ? "disabling" : "using");
+    }
+  } else if (errno) {
+    printf("Overlayfs %s failed with error %s\n", enable ? "teardown" : "setup", strerror(errno));
+    suggest_run_adb_root();
+  }
+  return change;
+}
+
+/* Use AVB to turn verity on/off */
+static bool set_avb_verity_enabled_state(AvbOps* ops, bool enable_verity) {
+  std::string ab_suffix = get_ab_suffix();
+  bool verity_enabled;
+
+  if (is_avb_device_locked()) {
+    printf("Device is locked. Please unlock the device first\n");
+    return false;
+  }
+
+  if (!avb_user_verity_get(ops, ab_suffix.c_str(), &verity_enabled)) {
+    printf("Error getting verity state. Try adb root first?\n");
+    return false;
+  }
+
+  if ((verity_enabled && enable_verity) || (!verity_enabled && !enable_verity)) {
+    printf("verity is already %s\n", verity_enabled ? "enabled" : "disabled");
+    return false;
+  }
+
+  if (!avb_user_verity_set(ops, ab_suffix.c_str(), enable_verity)) {
+    printf("Error setting verity\n");
+    return false;
+  }
+
+  overlayfs_setup(enable_verity);
+  printf("Successfully %s verity\n", enable_verity ? "enabled" : "disabled");
+  return true;
+}
+
+int main(int argc, char* argv[]) {
+  if (argc == 0) {
+    LOG(FATAL) << "set-verity-state called with empty argv";
+  }
+
+  std::optional<bool> enable_opt;
+  std::string procname = android::base::Basename(argv[0]);
+  if (procname == "enable-verity") {
+    enable_opt = true;
+  } else if (procname == "disable-verity") {
+    enable_opt = false;
+  }
+
+  if (!enable_opt.has_value()) {
+    if (argc != 2) {
+      printf("usage: %s [1|0]\n", argv[0]);
+      return 1;
+    }
+
+    if (strcmp(argv[1], "1") == 0) {
+      enable_opt = true;
+    } else if (strcmp(argv[1], "0") == 0) {
+      enable_opt = false;
+    } else {
+      printf("usage: %s [1|0]\n", argv[0]);
+      return 1;
+    }
+  }
+
+  bool enable = enable_opt.value();
+
+  bool any_changed = false;
+
+  // Figure out if we're using VB1.0 or VB2.0 (aka AVB) - by
+  // contract, androidboot.vbmeta.digest is set by the bootloader
+  // when using AVB).
+  bool using_avb = !android::base::GetProperty("ro.boot.vbmeta.digest", "").empty();
+
+  // If using AVB, dm-verity is used on any build so we want it to
+  // be possible to disable/enable on any build (except USER). For
+  // VB1.0 dm-verity is only enabled on certain builds.
+  if (!using_avb) {
+    if (!kAllowDisableVerity) {
+      printf("%s only works for userdebug builds\n", argv[0]);
+    }
+
+    if (!android::base::GetBoolProperty("ro.secure", false)) {
+      overlayfs_setup(enable);
+      printf("verity not enabled - ENG build\n");
+      return 0;
+    }
+  }
+
+  // Should never be possible to disable dm-verity on a USER build
+  // regardless of using AVB or VB1.0.
+  if (!__android_log_is_debuggable()) {
+    printf("verity cannot be disabled/enabled - USER build\n");
+    return 0;
+  }
+
+  if (using_avb) {
+    // Yep, the system is using AVB.
+    AvbOps* ops = avb_ops_user_new();
+    if (ops == nullptr) {
+      printf("Error getting AVB ops\n");
+      return 1;
+    }
+    if (set_avb_verity_enabled_state(ops, enable)) {
+      any_changed = true;
+    }
+    avb_ops_user_free(ops);
+  } else {
+    // Not using AVB - assume VB1.0.
+
+    // read all fstab entries at once from all sources
+    android::fs_mgr::Fstab fstab;
+    if (!android::fs_mgr::ReadDefaultFstab(&fstab)) {
+      printf("Failed to read fstab\n");
+      suggest_run_adb_root();
+      return 0;
+    }
+
+    // Loop through entries looking for ones that verity manages.
+    for (const auto& entry : fstab) {
+      if (entry.fs_mgr_flags.verify) {
+        if (set_verity_enabled_state(entry.blk_device.c_str(), entry.mount_point.c_str(), enable)) {
+          any_changed = true;
+        }
+      }
+    }
+  }
+  if (!any_changed) any_changed = overlayfs_setup(enable);
+
+  if (any_changed) {
+    printf("Now reboot your device for settings to take effect\n");
+  }
+
+  return 0;
+}
diff --git a/shell_and_utilities/Android.bp b/shell_and_utilities/Android.bp
index 694b50e..b5a5fb6 100644
--- a/shell_and_utilities/Android.bp
+++ b/shell_and_utilities/Android.bp
@@ -12,6 +12,7 @@
     required: [
         "auditctl",
         "awk",
+        "bc",
         "bzip2",
         "ldd",
         "logwrapper",
@@ -25,7 +26,7 @@
         "tcpdump",
         "toolbox",
         "toybox",
-        "unzip",
+        "ziptool",
     ],
 }
 
diff --git a/shell_and_utilities/README.md b/shell_and_utilities/README.md
index d391cc1..3bee875 100644
--- a/shell_and_utilities/README.md
+++ b/shell_and_utilities/README.md
@@ -218,25 +218,28 @@
 
 bzip2: bzcat bzip2 bunzip2
 
+gavinhoward/bc: bc
+
 one-true-awk: awk
 
 toolbox: getevent getprop setprop start stop
 
-toybox: acpi base64 basename bc blkid blockdev cal cat chattr chcon chgrp
-chmod chown chroot chrt cksum clear cmp comm cp cpio cut date dd df
-diff dirname dmesg dos2unix du echo egrep env expand expr fallocate
-false fgrep file find flock fmt free freeramdisk fsfreeze getconf
-getenforce getfattr grep groups gunzip gzip head help hostname hwclock
-i2cdetect i2cdump i2cget i2cset iconv id ifconfig inotifyd insmod
-install ionice iorenice iotop kill killall ln load\_policy log logname
-losetup ls lsattr lsmod lsof lspci lsusb makedevs md5sum microcom
+toybox: acpi base64 basename blkid blockdev cal cat chattr chcon chgrp chmod
+chown chroot chrt cksum clear cmp comm cp cpio cut date dd devmem
+df diff dirname dmesg dos2unix du echo egrep env expand expr fallocate
+false fgrep file find flock fmt free freeramdisk fsfreeze fsync getconf
+getenforce getfattr getopt grep groups gunzip gzip head help hostname
+hwclock i2cdetect i2cdump i2cget i2cset iconv id ifconfig inotifyd
+insmod install ionice iorenice iotop kill killall ln load\_policy log
+logname losetup ls lsattr lsmod lsof lspci lsusb makedevs md5sum microcom
 mkdir mkfifo mknod mkswap mktemp modinfo modprobe more mount mountpoint
 mv nbd-client nc netcat netstat nice nl nohup nproc nsenter od partprobe
 paste patch pgrep pidof ping ping6 pivot\_root pkill pmap printenv
-printf prlimit ps pwd pwdx readlink realpath renice restorecon rev
-rfkill rm rmdir rmmod runcon sed sendevent seq setenforce setfattr
-setsid sha1sum sha224sum sha256sum sha384sum sha512sum sleep sort split
-stat strings stty swapoff swapon sync sysctl tac tail tar taskset tee
-time timeout top touch tr traceroute traceroute6 true truncate tty tunctl
-ulimit umount uname uniq unix2dos unlink unshare uptime usleep uudecode
-uuencode uuidgen vconfig vmstat watch wc which whoami xargs xxd yes zcat
+printf prlimit ps pwd pwdx readelf readlink realpath renice restorecon
+rev rfkill rm rmdir rmmod runcon sed sendevent seq setenforce setfattr
+setsid sha1sum sha224sum sha256sum sha384sum sha512sum sleep sort
+split stat strings stty swapoff swapon sync sysctl tac tail tar taskset
+tee time timeout top touch tr traceroute traceroute6 true truncate
+tty tunctl ulimit umount uname uniq unix2dos unlink unshare uptime
+usleep uudecode uuencode uuidgen vconfig vi vmstat watch wc which
+whoami xargs xxd yes zcat
diff --git a/storaged/main.cpp b/storaged/main.cpp
index 3817fb5..e35bd6f 100644
--- a/storaged/main.cpp
+++ b/storaged/main.cpp
@@ -51,7 +51,7 @@
     storaged_sp->init();
     storaged_sp->report_storage_info();
 
-    LOG_TO(SYSTEM, INFO) << "storaged: Start";
+    LOG(INFO) << "storaged: Start";
 
     for (;;) {
         storaged_sp->event_checked();
@@ -76,6 +76,8 @@
     bool flag_dump_perf = false;
     int opt;
 
+    android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM));
+
     for (;;) {
         int opt_idx = 0;
         static struct option long_options[] = {
@@ -124,13 +126,13 @@
         pthread_t storaged_main_thread;
         errno = pthread_create(&storaged_main_thread, NULL, storaged_main, NULL);
         if (errno != 0) {
-            PLOG_TO(SYSTEM, ERROR) << "Failed to create main thread";
+            PLOG(ERROR) << "Failed to create main thread";
             return -1;
         }
 
         if (StoragedService::start() != android::OK ||
             StoragedPrivateService::start() != android::OK) {
-            PLOG_TO(SYSTEM, ERROR) << "Failed to start storaged service";
+            PLOG(ERROR) << "Failed to start storaged service";
             return -1;
         }
 
diff --git a/storaged/storaged.cpp b/storaged/storaged.cpp
index 1d934a2..573b8c5 100644
--- a/storaged/storaged.cpp
+++ b/storaged/storaged.cpp
@@ -97,25 +97,23 @@
 
     health = get_health_service();
     if (health == NULL) {
-        LOG_TO(SYSTEM, WARNING) << "health: failed to find IHealth service";
+        LOG(WARNING) << "health: failed to find IHealth service";
         return;
     }
 
     BatteryStatus status = BatteryStatus::UNKNOWN;
     auto ret = health->getChargeStatus([&](Result r, BatteryStatus v) {
         if (r != Result::SUCCESS) {
-            LOG_TO(SYSTEM, WARNING)
-                << "health: cannot get battery status " << toString(r);
+            LOG(WARNING) << "health: cannot get battery status " << toString(r);
             return;
         }
         if (v == BatteryStatus::UNKNOWN) {
-            LOG_TO(SYSTEM, WARNING) << "health: invalid battery status";
+            LOG(WARNING) << "health: invalid battery status";
         }
         status = v;
     });
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, WARNING) << "health: get charge status transaction error "
-            << ret.description();
+        LOG(WARNING) << "health: get charge status transaction error " << ret.description();
     }
 
     mUidm.init(is_charger_on(status));
@@ -126,11 +124,11 @@
 
 void storaged_t::serviceDied(uint64_t cookie, const wp<::android::hidl::base::V1_0::IBase>& who) {
     if (health != NULL && interfacesEqual(health, who.promote())) {
-        LOG_TO(SYSTEM, ERROR) << "health service died, exiting";
+        LOG(ERROR) << "health service died, exiting";
         android::hardware::IPCThreadState::self()->stopProcess();
         exit(1);
     } else {
-        LOG_TO(SYSTEM, ERROR) << "unknown service died";
+        LOG(ERROR) << "unknown service died";
     }
 }
 
@@ -192,7 +190,7 @@
         reinterpret_cast<const Bytef*>(uid_io_usage.SerializeAsString().c_str()),
         uid_io_usage.ByteSize());
     if (proto.crc() != computed_crc) {
-        LOG_TO(SYSTEM, WARNING) << "CRC mismatch in " << proto_file;
+        LOG(WARNING) << "CRC mismatch in " << proto_file;
         return;
     }
 
@@ -228,8 +226,7 @@
     char* data = nullptr;
     if (posix_memalign(reinterpret_cast<void**>(&data),
                        pagesize, proto->ByteSize())) {
-        PLOG_TO(SYSTEM, ERROR) << "Faied to alloc aligned buffer (size: "
-                               << proto->ByteSize() << ")";
+        PLOG(ERROR) << "Faied to alloc aligned buffer (size: " << proto->ByteSize() << ")";
         return data;
     }
 
@@ -246,7 +243,7 @@
                     (user_id == USER_SYSTEM ? O_DIRECT : 0),
                  S_IRUSR | S_IWUSR)));
     if (fd == -1) {
-        PLOG_TO(SYSTEM, ERROR) << "Faied to open tmp file: " << tmp_file;
+        PLOG(ERROR) << "Faied to open tmp file: " << tmp_file;
         return;
     }
 
@@ -261,7 +258,7 @@
             start = steady_clock::now();
             ret = write(fd, data, MIN(benchmark_unit_size, size));
             if (ret <= 0) {
-                PLOG_TO(SYSTEM, ERROR) << "Faied to write tmp file: " << tmp_file;
+                PLOG(ERROR) << "Faied to write tmp file: " << tmp_file;
                 return;
             }
             end = steady_clock::now();
@@ -284,7 +281,7 @@
         }
     } else {
         if (!WriteFully(fd, data, size)) {
-            PLOG_TO(SYSTEM, ERROR) << "Faied to write tmp file: " << tmp_file;
+            PLOG(ERROR) << "Faied to write tmp file: " << tmp_file;
             return;
         }
     }
@@ -343,22 +340,21 @@
     if (mConfig.event_time_check_usec &&
         clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &start_ts) < 0) {
         check_time = false;
-        PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+        PLOG(ERROR) << "clock_gettime() failed";
     }
 
     event();
 
     if (mConfig.event_time_check_usec && check_time) {
         if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_ts) < 0) {
-            PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+            PLOG(ERROR) << "clock_gettime() failed";
             return;
         }
         int64_t cost = (end_ts.tv_sec - start_ts.tv_sec) * SEC_TO_USEC +
                        (end_ts.tv_nsec - start_ts.tv_nsec) / USEC_TO_NSEC;
         if (cost > mConfig.event_time_check_usec) {
-            LOG_TO(SYSTEM, ERROR)
-                << "event loop spent " << cost << " usec, threshold "
-                << mConfig.event_time_check_usec << " usec";
+            LOG(ERROR) << "event loop spent " << cost << " usec, threshold "
+                       << mConfig.event_time_check_usec << " usec";
         }
     }
 }
diff --git a/storaged/storaged_diskstats.cpp b/storaged/storaged_diskstats.cpp
index 8b5001d..52bd4e0 100644
--- a/storaged/storaged_diskstats.cpp
+++ b/storaged/storaged_diskstats.cpp
@@ -41,8 +41,8 @@
     // skip if the input structure are all zeros
     if (perf == NULL || perf->is_zero()) return;
 
-    LOG_TO(SYSTEM, INFO) << "disk_perf " << type
-              << " rd: " << perf->read_perf << " kbps, " << perf->read_ios << " iops"
+    LOG(INFO) << "disk_perf " << type << " rd: " << perf->read_perf << " kbps, " << perf->read_ios
+              << " iops"
               << " wr: " << perf->write_perf << " kbps, " << perf->write_ios << " iops"
               << " q: " << perf->queue;
 }
@@ -71,7 +71,7 @@
     // when system is running.
     int ret = clock_gettime(CLOCK_MONOTONIC, ts);
     if (ret < 0) {
-        PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+        PLOG(ERROR) << "clock_gettime() failed";
         return false;
     }
     return true;
@@ -93,7 +93,7 @@
 
     std::string buffer;
     if (!android::base::ReadFileToString(disk_stats_path, &buffer)) {
-        PLOG_TO(SYSTEM, ERROR) << disk_stats_path << ": ReadFileToString failed.";
+        PLOG(ERROR) << disk_stats_path << ": ReadFileToString failed.";
         return false;
     }
 
@@ -130,12 +130,12 @@
     bool success = false;
     auto ret = service->getDiskStats([&success, stats](auto result, const auto& halStats) {
         if (result == Result::NOT_SUPPORTED) {
-            LOG_TO(SYSTEM, DEBUG) << "getDiskStats is not supported on health HAL.";
+            LOG(DEBUG) << "getDiskStats is not supported on health HAL.";
             return;
         }
         if (result != Result::SUCCESS || halStats.size() == 0) {
-            LOG_TO(SYSTEM, ERROR) << "getDiskStats failed with result " << toString(result)
-                                  << " and size " << halStats.size();
+            LOG(ERROR) << "getDiskStats failed with result " << toString(result) << " and size "
+                       << halStats.size();
             return;
         }
 
@@ -144,7 +144,7 @@
     });
 
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "getDiskStats failed with " << ret.description();
+        LOG(ERROR) << "getDiskStats failed with " << ret.description();
         return false;
     }
 
@@ -199,9 +199,9 @@
 void add_disk_stats(struct disk_stats* src, struct disk_stats* dst)
 {
     if (dst->end_time != 0 && dst->end_time != src->start_time) {
-        LOG_TO(SYSTEM, WARNING) << "Two dis-continuous periods of diskstats"
-            << " are added. dst end with " << dst->end_time
-            << ", src start with " << src->start_time;
+        LOG(WARNING) << "Two dis-continuous periods of diskstats"
+                     << " are added. dst end with " << dst->end_time << ", src start with "
+                     << src->start_time;
     }
 
     *dst += *src;
diff --git a/storaged/storaged_info.cpp b/storaged/storaged_info.cpp
index 6668cf3..bb21829 100644
--- a/storaged/storaged_info.cpp
+++ b/storaged/storaged_info.cpp
@@ -76,7 +76,7 @@
     if (!perf_history.has_day_start_sec() ||
         perf_history.daily_perf_size() > (int)daily_perf.size() ||
         perf_history.weekly_perf_size() > (int)weekly_perf.size()) {
-        LOG_TO(SYSTEM, ERROR) << "Invalid IOPerfHistory proto";
+        LOG(ERROR) << "Invalid IOPerfHistory proto";
         return;
     }
 
@@ -114,7 +114,7 @@
 {
     struct statvfs buf;
     if (statvfs(userdata_path.c_str(), &buf) != 0) {
-        PLOG_TO(SYSTEM, WARNING) << "Failed to get userdata info";
+        PLOG(WARNING) << "Failed to get userdata info";
         return;
     }
 
@@ -328,12 +328,12 @@
 void health_storage_info_t::report() {
     auto ret = mHealth->getStorageInfo([this](auto result, const auto& halInfos) {
         if (result == Result::NOT_SUPPORTED) {
-            LOG_TO(SYSTEM, DEBUG) << "getStorageInfo is not supported on health HAL.";
+            LOG(DEBUG) << "getStorageInfo is not supported on health HAL.";
             return;
         }
         if (result != Result::SUCCESS || halInfos.size() == 0) {
-            LOG_TO(SYSTEM, ERROR) << "getStorageInfo failed with result " << toString(result)
-                                  << " and size " << halInfos.size();
+            LOG(ERROR) << "getStorageInfo failed with result " << toString(result) << " and size "
+                       << halInfos.size();
             return;
         }
         set_values_from_hal_storage_info(halInfos[0]);
@@ -341,7 +341,7 @@
     });
 
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "getStorageInfo failed with " << ret.description();
+        LOG(ERROR) << "getStorageInfo failed with " << ret.description();
     }
 }
 
diff --git a/storaged/storaged_uid_monitor.cpp b/storaged/storaged_uid_monitor.cpp
index 55380ba..f47bf72 100644
--- a/storaged/storaged_uid_monitor.cpp
+++ b/storaged/storaged_uid_monitor.cpp
@@ -71,8 +71,7 @@
         !ParseUint(fields[8],  &io[BACKGROUND].write_bytes) ||
         !ParseUint(fields[9],  &io[FOREGROUND].fsync) ||
         !ParseUint(fields[10], &io[BACKGROUND].fsync)) {
-        LOG_TO(SYSTEM, WARNING) << "Invalid uid I/O stats: \""
-                                << s << "\"";
+        LOG(WARNING) << "Invalid uid I/O stats: \"" << s << "\"";
         return false;
     }
     return true;
@@ -95,8 +94,7 @@
         !ParseUint(fields[size - 3], &io[BACKGROUND].write_bytes) ||
         !ParseUint(fields[size - 2], &io[FOREGROUND].fsync) ||
         !ParseUint(fields[size - 1], &io[BACKGROUND].fsync)) {
-        LOG_TO(SYSTEM, WARNING) << "Invalid task I/O stats: \""
-                                << s << "\"";
+        LOG(WARNING) << "Invalid task I/O stats: \"" << s << "\"";
         return false;
     }
     comm = Join(std::vector<std::string>(
@@ -123,13 +121,13 @@
 {
     sp<IServiceManager> sm = defaultServiceManager();
     if (sm == NULL) {
-        LOG_TO(SYSTEM, ERROR) << "defaultServiceManager failed";
+        LOG(ERROR) << "defaultServiceManager failed";
         return;
     }
 
     sp<IBinder> binder = sm->getService(String16("package_native"));
     if (binder == NULL) {
-        LOG_TO(SYSTEM, ERROR) << "getService package_native failed";
+        LOG(ERROR) << "getService package_native failed";
         return;
     }
 
@@ -137,8 +135,7 @@
     std::vector<std::string> names;
     binder::Status status = package_mgr->getNamesForUids(uids, &names);
     if (!status.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "package_native::getNamesForUids failed: "
-                              << status.exceptionMessage();
+        LOG(ERROR) << "package_native::getNamesForUids failed: " << status.exceptionMessage();
         return;
     }
 
@@ -158,7 +155,7 @@
     std::unordered_map<uint32_t, uid_info> uid_io_stats;
     std::string buffer;
     if (!ReadFileToString(UID_IO_STATS_PATH, &buffer)) {
-        PLOG_TO(SYSTEM, ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed";
+        PLOG(ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed";
         return uid_io_stats;
     }
 
diff --git a/trusty/Android.bp b/trusty/Android.bp
deleted file mode 100644
index 2fb2e19..0000000
--- a/trusty/Android.bp
+++ /dev/null
@@ -1,6 +0,0 @@
-subdirs = [
-    "gatekeeper",
-    "keymaster",
-    "libtrusty",
-    "storage/*",
-]
diff --git a/trusty/OWNERS b/trusty/OWNERS
index e807d71..1fb473e 100644
--- a/trusty/OWNERS
+++ b/trusty/OWNERS
@@ -2,6 +2,8 @@
 dkrahn@google.com
 drewry@google.com
 gmar@google.com
+mmaurer@google.com
 ncbray@google.com
-rpere@google.com
 swillden@google.com
+trong@google.com
+wenhaowang@google.com
diff --git a/trusty/confirmationui/.clang-format b/trusty/confirmationui/.clang-format
new file mode 100644
index 0000000..b0dc94c
--- /dev/null
+++ b/trusty/confirmationui/.clang-format
@@ -0,0 +1,10 @@
+BasedOnStyle: LLVM
+IndentWidth: 4
+UseTab: Never
+BreakBeforeBraces: Attach
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: true
+IndentCaseLabels: false
+ColumnLimit: 100
+PointerBindsToType: true
+SpacesBeforeTrailingComments: 2
diff --git a/trusty/confirmationui/Android.bp b/trusty/confirmationui/Android.bp
new file mode 100644
index 0000000..60e0e71
--- /dev/null
+++ b/trusty/confirmationui/Android.bp
@@ -0,0 +1,95 @@
+// Copyright (C) 2020 The Android Open-Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// WARNING: Everything listed here will be built on ALL platforms,
+// including x86, the emulator, and the SDK.  Modules must be uniquely
+// named (liblights.panda), and must build everywhere, or limit themselves
+// to only building on ARM if they include assembly. Individual makefiles
+// are responsible for having their own logic, for fine-grained control.
+
+cc_binary {
+    name: "android.hardware.confirmationui@1.0-service.trusty",
+    relative_install_path: "hw",
+    vendor: true,
+    shared_libs: [
+        "android.hardware.confirmationui@1.0",
+        "android.hardware.confirmationui.not-so-secure-input",
+        "android.hardware.confirmationui@1.0-lib.trusty",
+        "libbase",
+        "libhidlbase",
+        "libutils",
+    ],
+
+    init_rc: ["android.hardware.confirmationui@1.0-service.trusty.rc"],
+
+    vintf_fragments: ["android.hardware.confirmationui@1.0-service.trusty.xml"],
+
+    srcs: [
+        "service.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-DTEEUI_USE_STD_VECTOR",
+    ],
+}
+
+cc_library {
+    name: "android.hardware.confirmationui@1.0-lib.trusty",
+    vendor: true,
+    shared_libs: [
+        "android.hardware.confirmationui@1.0",
+        "android.hardware.keymaster@4.0",
+        "libbase",
+        "libhidlbase",
+        "libteeui_hal_support",
+        "libtrusty",
+        "libutils",
+    ],
+
+    export_include_dirs: ["include"],
+
+    srcs: [
+        "TrustyApp.cpp",
+        "TrustyConfirmationUI.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-DTEEUI_USE_STD_VECTOR",
+    ],
+}
+
+cc_library {
+    name: "android.hardware.confirmationui.not-so-secure-input",
+    vendor: true,
+    shared_libs: [
+        "libbase",
+        "libcrypto",
+        "libteeui_hal_support",
+    ],
+
+    srcs: [
+        "NotSoSecureInput.cpp",
+    ],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-DTEEUI_USE_STD_VECTOR",
+    ],
+}
\ No newline at end of file
diff --git a/trusty/confirmationui/NotSoSecureInput.cpp b/trusty/confirmationui/NotSoSecureInput.cpp
new file mode 100644
index 0000000..3d9a2d6
--- /dev/null
+++ b/trusty/confirmationui/NotSoSecureInput.cpp
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/logging.h>
+#include <endian.h>
+#include <memory>
+#include <openssl/hmac.h>
+#include <openssl/rand.h>
+#include <openssl/sha.h>
+#include <secure_input/evdev.h>
+#include <secure_input/secure_input_device.h>
+#include <teeui/utils.h>
+
+#include <initializer_list>
+
+using namespace secure_input;
+
+using teeui::AuthTokenKey;
+using teeui::ByteBufferProxy;
+using teeui::Hmac;
+using teeui::optional;
+using teeui::ResponseCode;
+using teeui::TestKeyBits;
+
+constexpr const auto kTestKey = AuthTokenKey::fill(static_cast<uint8_t>(TestKeyBits::BYTE));
+
+class SecureInputHMacer {
+  public:
+    static optional<Hmac> hmac256(const AuthTokenKey& key,
+                                  std::initializer_list<ByteBufferProxy> buffers) {
+        HMAC_CTX hmacCtx;
+        HMAC_CTX_init(&hmacCtx);
+        if (!HMAC_Init_ex(&hmacCtx, key.data(), key.size(), EVP_sha256(), nullptr)) {
+            return {};
+        }
+        for (auto& buffer : buffers) {
+            if (!HMAC_Update(&hmacCtx, buffer.data(), buffer.size())) {
+                return {};
+            }
+        }
+        Hmac result;
+        if (!HMAC_Final(&hmacCtx, result.data(), nullptr)) {
+            return {};
+        }
+        return result;
+    }
+};
+
+using HMac = teeui::HMac<SecureInputHMacer>;
+
+Nonce generateNonce() {
+    /*
+     * Completely random nonce.
+     * Running the secure input protocol from the HAL service is not secure
+     * because we don't trust the non-secure world (i.e., HLOS/Android/Linux). So
+     * using a constant "nonce" here does not weaken security. If this code runs
+     * on a truly trustworthy source of input events this function needs to return
+     * hight entropy nonces.
+     * As of this writing the call to RAND_bytes is commented, because the
+     * emulator this HAL service runs on does not have a good source of entropy.
+     * It would block the call to RAND_bytes indefinitely.
+     */
+    Nonce result{0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+                 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
+                 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04};
+    // RAND_bytes(result.data(), result.size());
+    return result;
+}
+
+/**
+ * This is an implementation of the SecureInput protocol in unserspace. This is
+ * just an example and should not be used as is. The protocol implemented her
+ * should be used by a trusted input device that can assert user events with
+ * high assurance even if the HLOS kernel is compromised. A confirmationui HAL
+ * that links directly against this implementation is not secure and shal not be
+ * used on a production device.
+ */
+class NotSoSecureInput : public SecureInput {
+  public:
+    NotSoSecureInput(HsBeginCb hsBeginCb, HsFinalizeCb hsFinalizeCb, DeliverEventCb deliverEventCb,
+                     InputResultCb inputResultCb)
+        : hsBeginCb_{hsBeginCb}, hsFinalizeCb_{hsFinalizeCb}, deliverEventCb_{deliverEventCb},
+          inputResultCb_{inputResultCb}, discardEvents_{true} {}
+
+    operator bool() const override { return true; }
+
+    void handleEvent(const EventDev& evdev) override {
+        bool gotEvent;
+        input_event evt;
+        std::tie(gotEvent, evt) = evdev.readEvent();
+        while (gotEvent) {
+            if (!(discardEvents_) && evt.type == EV_KEY &&
+                (evt.code == KEY_POWER || evt.code == KEY_VOLUMEDOWN || evt.code == KEY_VOLUMEUP) &&
+                evt.value == 1) {
+                DTupKeyEvent event = DTupKeyEvent::RESERVED;
+
+                // Translate the event code into DTupKeyEvent which the TA understands.
+                switch (evt.code) {
+                case KEY_POWER:
+                    event = DTupKeyEvent::PWR;
+                    break;
+                case KEY_VOLUMEDOWN:
+                    event = DTupKeyEvent::VOL_DOWN;
+                    break;
+                case KEY_VOLUMEUP:
+                    event = DTupKeyEvent::VOL_UP;
+                    break;
+                }
+
+                // The event goes into the HMAC in network byte order.
+                uint32_t keyEventBE = htobe32(static_cast<uint32_t>(event));
+                auto signature = HMac::hmac256(kTestKey, kConfirmationUIEventLabel,
+                                               teeui::bytesCast(keyEventBE), nCi_);
+
+                teeui::ResponseCode rc;
+                InputResponse ir;
+                auto response = std::tie(rc, ir);
+                if (event != DTupKeyEvent::RESERVED) {
+                    response = deliverEventCb_(event, *signature);
+                    if (rc != ResponseCode::OK) {
+                        LOG(ERROR) << "DeliverInputEvent returned with " << uint32_t(rc);
+                        inputResultCb_(rc);
+                    } else {
+                        switch (ir) {
+                        case InputResponse::OK:
+                            inputResultCb_(rc);
+                            break;
+                        case InputResponse::PENDING_MORE:
+                            rc = performDTUPHandshake();
+                            if (rc != ResponseCode::OK) {
+                                inputResultCb_(rc);
+                            }
+                            break;
+                        case InputResponse::TIMED_OUT:
+                            inputResultCb_(rc);
+                            break;
+                        }
+                    }
+                }
+            }
+            std::tie(gotEvent, evt) = evdev.readEvent();
+        }
+    }
+
+    void start() override {
+        auto rc = performDTUPHandshake();
+        if (rc != ResponseCode::OK) {
+            inputResultCb_(rc);
+        }
+        discardEvents_ = false;
+    };
+
+  private:
+    teeui::ResponseCode performDTUPHandshake() {
+        ResponseCode rc;
+        LOG(INFO) << "Start handshake";
+        Nonce nCo;
+        std::tie(rc, nCo) = hsBeginCb_();
+        if (rc != ResponseCode::OK) {
+            LOG(ERROR) << "Failed to begin secure input handshake (" << uint32_t(rc) << ")";
+            return rc;
+        }
+
+        nCi_ = generateNonce();
+        rc =
+            hsFinalizeCb_(*HMac::hmac256(kTestKey, kConfirmationUIHandshakeLabel, nCo, nCi_), nCi_);
+
+        if (rc != ResponseCode::OK) {
+            LOG(ERROR) << "Failed to finalize secure input handshake (" << uint32_t(rc) << ")";
+            return rc;
+        }
+        return ResponseCode::OK;
+    }
+
+    HsBeginCb hsBeginCb_;
+    HsFinalizeCb hsFinalizeCb_;
+    DeliverEventCb deliverEventCb_;
+    InputResultCb inputResultCb_;
+
+    std::atomic_bool discardEvents_;
+    Nonce nCi_;
+};
+
+namespace secure_input {
+
+std::shared_ptr<SecureInput> createSecureInput(SecureInput::HsBeginCb hsBeginCb,
+                                               SecureInput::HsFinalizeCb hsFinalizeCb,
+                                               SecureInput::DeliverEventCb deliverEventCb,
+                                               SecureInput::InputResultCb inputResultCb) {
+    return std::make_shared<NotSoSecureInput>(hsBeginCb, hsFinalizeCb, deliverEventCb,
+                                              inputResultCb);
+}
+
+}  // namespace secure_input
diff --git a/trusty/confirmationui/README b/trusty/confirmationui/README
new file mode 100644
index 0000000..45d4e76
--- /dev/null
+++ b/trusty/confirmationui/README
@@ -0,0 +1,20 @@
+## Secure UI Architecture
+
+To implement confirmationui a secure UI architecture is required. This entails a way
+to display the confirmation dialog driven by a reduced trusted computing base, typically
+a trusted execution environment (TEE), without having to rely on Linux and the Android
+system for integrity and authenticity of input events. This implementation provides
+neither. But it provides most of the functionlity required to run a full Android Protected
+Confirmation feature when integrated into a secure UI architecture.
+
+## Secure input (NotSoSecureInput)
+
+This implementation does not provide any security guaranties.
+The input method (NotSoSecureInput) runs a cryptographic protocols that is
+sufficiently secure IFF the end point is implemented on a trustworthy
+secure input device. But since the endpoint is currently in the HAL
+service itself this implementation is not secure.
+
+NOTE that a secure input device end point needs a good source of entropy
+for generating nonces. The current implementation (NotSoSecureInput.cpp#generateNonce)
+uses a constant nonce.
\ No newline at end of file
diff --git a/trusty/confirmationui/TrustyApp.cpp b/trusty/confirmationui/TrustyApp.cpp
new file mode 100644
index 0000000..e4c68f9
--- /dev/null
+++ b/trusty/confirmationui/TrustyApp.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "TrustyApp.h"
+
+#include <android-base/logging.h>
+#include <sys/uio.h>
+#include <trusty/tipc.h>
+
+namespace android {
+namespace trusty {
+
+// 0x1000 is the message buffer size but we need to leave some space for a protocol header.
+// This assures that packets can always be read/written in one read/write operation.
+static constexpr const uint32_t kPacketSize = 0x1000 - 32;
+
+enum class PacketType : uint32_t {
+    SND,
+    RCV,
+    ACK,
+};
+
+struct PacketHeader {
+    PacketType type;
+    uint32_t remaining;
+};
+
+const char* toString(PacketType t) {
+    switch (t) {
+    case PacketType::SND:
+        return "SND";
+    case PacketType::RCV:
+        return "RCV";
+    case PacketType::ACK:
+        return "ACK";
+    default:
+        return "UNKNOWN";
+    }
+}
+
+static constexpr const uint32_t kHeaderSize = sizeof(PacketHeader);
+static constexpr const uint32_t kPayloadSize = kPacketSize - kHeaderSize;
+
+ssize_t TrustyRpc(int handle, const uint8_t* obegin, const uint8_t* oend, uint8_t* ibegin,
+                  uint8_t* iend) {
+    while (obegin != oend) {
+        PacketHeader header = {
+            .type = PacketType::SND,
+            .remaining = uint32_t(oend - obegin),
+        };
+        uint32_t body_size = std::min(kPayloadSize, header.remaining);
+        iovec iov[] = {
+            {
+                .iov_base = &header,
+                .iov_len = kHeaderSize,
+            },
+            {
+                .iov_base = const_cast<uint8_t*>(obegin),
+                .iov_len = body_size,
+            },
+        };
+        int rc = writev(handle, iov, 2);
+        if (!rc) {
+            PLOG(ERROR) << "Error sending SND message. " << rc;
+            return rc;
+        }
+
+        obegin += body_size;
+
+        rc = read(handle, &header, kHeaderSize);
+        if (!rc) {
+            PLOG(ERROR) << "Error reading ACK. " << rc;
+            return rc;
+        }
+
+        if (header.type != PacketType::ACK || header.remaining != oend - obegin) {
+            LOG(ERROR) << "malformed ACK";
+            return -1;
+        }
+    }
+
+    ssize_t remaining = 0;
+    auto begin = ibegin;
+    do {
+        PacketHeader header = {
+            .type = PacketType::RCV,
+            .remaining = 0,
+        };
+
+        iovec iov[] = {
+            {
+                .iov_base = &header,
+                .iov_len = kHeaderSize,
+            },
+            {
+                .iov_base = begin,
+                .iov_len = uint32_t(iend - begin),
+            },
+        };
+
+        ssize_t rc = writev(handle, iov, 1);
+        if (!rc) {
+            PLOG(ERROR) << "Error sending RCV message. " << rc;
+            return rc;
+        }
+
+        rc = readv(handle, iov, 2);
+        if (rc < 0) {
+            PLOG(ERROR) << "Error reading response. " << rc;
+            return rc;
+        }
+
+        uint32_t body_size = std::min(kPayloadSize, header.remaining);
+        if (body_size != rc - kHeaderSize) {
+            LOG(ERROR) << "Unexpected amount of data: " << rc;
+            return -1;
+        }
+
+        remaining = header.remaining - body_size;
+        begin += body_size;
+    } while (remaining);
+
+    return begin - ibegin;
+}
+
+TrustyApp::TrustyApp(const std::string& path, const std::string& appname)
+    : handle_(kInvalidHandle) {
+    handle_ = tipc_connect(path.c_str(), appname.c_str());
+    if (handle_ == kInvalidHandle) {
+        LOG(ERROR) << AT << "failed to connect to Trusty TA \"" << appname << "\" using dev:"
+                   << "\"" << path << "\"";
+    }
+    LOG(INFO) << AT << "succeeded to connect to Trusty TA \"" << appname << "\"";
+}
+TrustyApp::~TrustyApp() {
+    if (handle_ != kInvalidHandle) {
+        tipc_close(handle_);
+    }
+    LOG(INFO) << "Done shutting down TrustyApp";
+}
+
+}  // namespace trusty
+}  // namespace android
diff --git a/trusty/confirmationui/TrustyApp.h b/trusty/confirmationui/TrustyApp.h
new file mode 100644
index 0000000..05a25f6
--- /dev/null
+++ b/trusty/confirmationui/TrustyApp.h
@@ -0,0 +1,155 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/logging.h>
+#include <errno.h>
+#include <poll.h>
+#include <stdio.h>
+#include <sys/eventfd.h>
+#include <sys/stat.h>
+#include <teeui/msg_formatting.h>
+#include <trusty/tipc.h>
+#include <unistd.h>
+
+#include <fstream>
+#include <functional>
+#include <future>
+#include <iostream>
+#include <sstream>
+#include <thread>
+#include <vector>
+
+#define AT __FILE__ ":" << __LINE__ << ": "
+
+namespace android {
+namespace trusty {
+
+using ::teeui::Message;
+using ::teeui::msg2tuple_t;
+using ::teeui::ReadStream;
+using ::teeui::WriteStream;
+
+#ifndef TEEUI_USE_STD_VECTOR
+/*
+ * TEEUI_USE_STD_VECTOR makes certain wire types like teeui::MsgString and
+ * teeui::MsgVector be aliases for std::vector. This is required for thread safe
+ * message serialization. Always compile this with -DTEEUI_USE_STD_VECTOR set in
+ * CFLAGS of the HAL service.
+ */
+#error "Must be compiled with -DTEEUI_USE_STD_VECTOR."
+#endif
+
+enum class TrustyAppError : int32_t {
+    OK,
+    ERROR = -1,
+    MSG_TOO_LONG = -2,
+};
+
+/*
+ * There is a hard limitation of 0x1800 bytes for the to-be-signed message size. The protocol
+ * overhead is limited, so that 0x2000 is a buffer size that will be sufficient in any benign
+ * mode of operation.
+ */
+static constexpr const size_t kSendBufferSize = 0x2000;
+
+ssize_t TrustyRpc(int handle, const uint8_t* obegin, const uint8_t* oend, uint8_t* ibegin,
+                  uint8_t* iend);
+
+class TrustyApp {
+  private:
+    int handle_;
+    static constexpr const int kInvalidHandle = -1;
+    /*
+     * This mutex serializes communication with the trusted app, not handle_.
+     * Calling issueCmd during construction or deletion is undefined behavior.
+     */
+    std::mutex mutex_;
+
+  public:
+    TrustyApp(const std::string& path, const std::string& appname);
+    ~TrustyApp();
+
+    template <typename Request, typename Response, typename... T>
+    std::tuple<TrustyAppError, msg2tuple_t<Response>> issueCmd(const T&... args) {
+        std::lock_guard<std::mutex> lock(mutex_);
+
+        if (handle_ == kInvalidHandle) {
+            LOG(ERROR) << "TrustyApp not connected";
+            return {TrustyAppError::ERROR, {}};
+        }
+
+        uint8_t buffer[kSendBufferSize];
+        WriteStream out(buffer);
+
+        out = write(Request(), out, args...);
+        if (!out) {
+            LOG(ERROR) << AT << "send command failed: message formatting";
+            return {TrustyAppError::MSG_TOO_LONG, {}};
+        }
+
+        auto rc = TrustyRpc(handle_, &buffer[0], const_cast<const uint8_t*>(out.pos()), &buffer[0],
+                            &buffer[kSendBufferSize]);
+        if (rc < 0) return {TrustyAppError::ERROR, {}};
+
+        ReadStream in(&buffer[0], rc);
+        auto result = read(Response(), in);
+        if (!std::get<0>(result)) {
+            LOG(ERROR) << "send command failed: message parsing";
+            return {TrustyAppError::ERROR, {}};
+        }
+
+        return {std::get<0>(result) ? TrustyAppError::OK : TrustyAppError::ERROR,
+                tuple_tail(std::move(result))};
+    }
+
+    template <typename Request, typename... T> TrustyAppError issueCmd(const T&... args) {
+        std::lock_guard<std::mutex> lock(mutex_);
+
+        if (handle_ == kInvalidHandle) {
+            LOG(ERROR) << "TrustyApp not connected";
+            return TrustyAppError::ERROR;
+        }
+
+        uint8_t buffer[kSendBufferSize];
+        WriteStream out(buffer);
+
+        out = write(Request(), out, args...);
+        if (!out) {
+            LOG(ERROR) << AT << "send command failed: message formatting";
+            return TrustyAppError::MSG_TOO_LONG;
+        }
+
+        auto rc = TrustyRpc(handle_, &buffer[0], const_cast<const uint8_t*>(out.pos()), &buffer[0],
+                            &buffer[kSendBufferSize]);
+        if (rc < 0) {
+            LOG(ERROR) << "send command failed: " << strerror(errno) << " (" << errno << ")";
+            return TrustyAppError::ERROR;
+        }
+
+        if (rc > 0) {
+            LOG(ERROR) << "Unexpected non zero length response";
+            return TrustyAppError::ERROR;
+        }
+        return TrustyAppError::OK;
+    }
+
+    operator bool() const { return handle_ != kInvalidHandle; }
+};
+
+}  // namespace trusty
+}  // namespace android
diff --git a/trusty/confirmationui/TrustyConfirmationUI.cpp b/trusty/confirmationui/TrustyConfirmationUI.cpp
new file mode 100644
index 0000000..6b25893
--- /dev/null
+++ b/trusty/confirmationui/TrustyConfirmationUI.cpp
@@ -0,0 +1,513 @@
+/*
+ *
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "TrustyConfirmationUI.h"
+
+#include <android-base/logging.h>
+#include <android/hardware/confirmationui/1.0/types.h>
+#include <android/hardware/keymaster/4.0/types.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <poll.h>
+#include <pthread.h>
+#include <secure_input/evdev.h>
+#include <secure_input/secure_input_device.h>
+#include <secure_input/secure_input_proto.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <teeui/msg_formatting.h>
+#include <teeui/utils.h>
+#include <time.h>
+
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <thread>
+#include <tuple>
+#include <vector>
+
+namespace android {
+namespace hardware {
+namespace confirmationui {
+namespace V1_0 {
+namespace implementation {
+
+using namespace secure_input;
+
+using ::android::trusty::TrustyAppError;
+
+using ::teeui::AbortMsg;
+using ::teeui::DeliverTestCommandMessage;
+using ::teeui::DeliverTestCommandResponse;
+using ::teeui::FetchConfirmationResult;
+using ::teeui::MsgString;
+using ::teeui::MsgVector;
+using ::teeui::PromptUserConfirmationMsg;
+using ::teeui::PromptUserConfirmationResponse;
+using ::teeui::ResultMsg;
+
+using ::secure_input::createSecureInput;
+
+using ::android::hardware::keymaster::V4_0::HardwareAuthToken;
+
+using ::std::tie;
+
+using TeeuiRc = ::teeui::ResponseCode;
+
+constexpr const char kTrustyDeviceName[] = "/dev/trusty-ipc-dev0";
+constexpr const char kConfirmationuiAppName[] = "com.android.trusty.confirmationui";
+
+namespace {
+
+class Finalize {
+  private:
+    std::function<void()> f_;
+
+  public:
+    Finalize(std::function<void()> f) : f_(f) {}
+    ~Finalize() {
+        if (f_) f_();
+    }
+    void release() { f_ = {}; }
+};
+
+ResponseCode convertRc(TeeuiRc trc) {
+    static_assert(
+        uint32_t(TeeuiRc::OK) == uint32_t(ResponseCode::OK) &&
+            uint32_t(TeeuiRc::Canceled) == uint32_t(ResponseCode::Canceled) &&
+            uint32_t(TeeuiRc::Aborted) == uint32_t(ResponseCode::Aborted) &&
+            uint32_t(TeeuiRc::OperationPending) == uint32_t(ResponseCode::OperationPending) &&
+            uint32_t(TeeuiRc::Ignored) == uint32_t(ResponseCode::Ignored) &&
+            uint32_t(TeeuiRc::SystemError) == uint32_t(ResponseCode::SystemError) &&
+            uint32_t(TeeuiRc::Unimplemented) == uint32_t(ResponseCode::Unimplemented) &&
+            uint32_t(TeeuiRc::Unexpected) == uint32_t(ResponseCode::Unexpected) &&
+            uint32_t(TeeuiRc::UIError) == uint32_t(ResponseCode::UIError) &&
+            uint32_t(TeeuiRc::UIErrorMissingGlyph) == uint32_t(ResponseCode::UIErrorMissingGlyph) &&
+            uint32_t(TeeuiRc::UIErrorMessageTooLong) ==
+                uint32_t(ResponseCode::UIErrorMessageTooLong) &&
+            uint32_t(TeeuiRc::UIErrorMalformedUTF8Encoding) ==
+                uint32_t(ResponseCode::UIErrorMalformedUTF8Encoding),
+        "teeui::ResponseCode and "
+        "::android::hardware::confirmationui::V1_0::Responsecude are out of "
+        "sync");
+    return ResponseCode(trc);
+}
+
+teeui::UIOption convertUIOption(UIOption uio) {
+    static_assert(uint32_t(UIOption::AccessibilityInverted) ==
+                          uint32_t(teeui::UIOption::AccessibilityInverted) &&
+                      uint32_t(UIOption::AccessibilityMagnified) ==
+                          uint32_t(teeui::UIOption::AccessibilityMagnified),
+                  "teeui::UIOPtion and ::android::hardware::confirmationui::V1_0::UIOption "
+                  "anre out of sync");
+    return teeui::UIOption(uio);
+}
+
+inline MsgString hidl2MsgString(const hidl_string& s) {
+    return {s.c_str(), s.c_str() + s.size()};
+}
+template <typename T> inline MsgVector<T> hidl2MsgVector(const hidl_vec<T>& v) {
+    return {v};
+}
+
+inline MsgVector<teeui::UIOption> hidl2MsgVector(const hidl_vec<UIOption>& v) {
+    MsgVector<teeui::UIOption> result(v.size());
+    for (unsigned int i = 0; i < v.size(); ++i) {
+        result[i] = convertUIOption(v[i]);
+    }
+    return result;
+}
+
+}  // namespace
+
+TrustyConfirmationUI::TrustyConfirmationUI()
+    : listener_state_(ListenerState::None), prompt_result_(ResponseCode::Ignored) {}
+
+TrustyConfirmationUI::~TrustyConfirmationUI() {
+    ListenerState state = listener_state_;
+    if (state == ListenerState::SetupDone || state == ListenerState::Interactive) {
+        abort();
+    }
+    if (state != ListenerState::None) {
+        callback_thread_.join();
+    }
+}
+
+std::tuple<TeeuiRc, MsgVector<uint8_t>, MsgVector<uint8_t>>
+TrustyConfirmationUI::promptUserConfirmation_(const MsgString& promptText,
+                                              const MsgVector<uint8_t>& extraData,
+                                              const MsgString& locale,
+                                              const MsgVector<teeui::UIOption>& uiOptions) {
+    std::unique_lock<std::mutex> stateLock(listener_state_lock_);
+    /*
+     * This is the main listener thread function. The listener thread life cycle
+     * is equivalent to the life cycle of a single confirmation request. The life
+     * cycle is devided in four phases.
+     *  * The starting phase:
+     *    * The Trusted App gets loaded and/or the connection to it gets established.
+     *    * A connection to the secure input device is established.
+     *    * The prompt is initiated. This sends all information required by the
+     *      confirmation dialog to the TA. The dialog is not yet displayed.
+     *    * An event loop is created.
+     *      * The event loop listens for user input events, fetches them from the
+     *        secure input device, and delivers them to the TA.
+     *    * All evdev devices are grabbed to give confirmationui exclusive access
+     *      to user input.
+     *
+     * Note: During the starting phase the hwbinder service thread is blocked and
+     * waiting for possible Errors. If the setup phase concludes sucessfully, the
+     * hwbinder service thread gets unblocked and returns successfully. Errors
+     * that occur after the first phase are delivered by callback interface.
+     *
+     *  * The 2nd phase - non interactive phase
+     *    * The event loop thread is started.
+     *    * After a grace period:
+     *      * A handshake between the secure input device SecureInput and the TA
+     *        is performed.
+     *      * The input event handler are armed to process user input events.
+     *
+     *  * The 3rd phase - interactive phase
+     *    * We wait to any external event
+     *      * Abort
+     *      * Secure user input asserted
+     *      * Secure input delivered (for non interactive VTS testing)
+     *    * The result is fetched from the TA.
+     *
+     *  * The 4th phase - cleanup
+     *    The cleanup phase is given by the scope of automatic variables created
+     *    in this function. The cleanup commences in reverse order of their creation.
+     *    Here is a list of more complex items in the order in which they go out of
+     *    scope
+     *    * finalizeSecureTouch - signals and joins the secure touch thread.
+     *    * eventloop - signals and joins the event loop thread. The event
+     *      handlers also own all EventDev instances which ungrab the event devices.
+     *      When the eventloop goes out of scope the EventDevs get destroyed
+     *      relinquishing the exclusive hold on the event devices.
+     *    * finalizeConfirmationPrompt - calls abort on the TA, making sure a
+     *      pending operation gets canceled. If the prompt concluded successfully this
+     *      is a spurious call but semantically a no op.
+     *    * secureInput - shuts down the connection to the secure input device
+     *      SecureInput.
+     *    * app - disconnects the TA. Since app is a shared pointer this may not
+     *      unload the app here. It is possible that more instances of the shared
+     *      pointer are held in TrustyConfirmationUI::deliverSecureInputEvent and
+     *      TrustyConfirmationUI::abort. But these instances are extremely short lived
+     *      and it is safe if they are destroyed by either.
+     *    * stateLock - unlocks the listener_state_lock_ if it happens to be held
+     *      at the time of return.
+     */
+
+    std::tuple<TeeuiRc, MsgVector<uint8_t>, MsgVector<uint8_t>> result;
+    TeeuiRc& rc = std::get<TeeuiRc>(result);
+    rc = TeeuiRc::SystemError;
+
+    listener_state_ = ListenerState::Starting;
+
+    auto app = std::make_shared<TrustyApp>(kTrustyDeviceName, kConfirmationuiAppName);
+    if (!app) return result;  // TeeuiRc::SystemError
+
+    app_ = app;
+
+    auto hsBegin = [&]() -> std::tuple<TeeuiRc, Nonce> {
+        auto [error, result] =
+            app->issueCmd<secure_input::InputHandshake, secure_input::InputHandshakeResponse>();
+        auto& [rc, nCo] = result;
+
+        if (error != TrustyAppError::OK || rc != TeeuiRc::OK) {
+            LOG(ERROR) << "Failed to begin secure input handshake (" << int32_t(error) << "/"
+                       << uint32_t(rc) << ")";
+            rc = error != TrustyAppError::OK ? TeeuiRc::SystemError : rc;
+        }
+        return result;
+    };
+
+    auto hsFinalize = [&](const Signature& sig, const Nonce& nCi) -> TeeuiRc {
+        auto [error, finalizeResponse] =
+            app->issueCmd<FinalizeInputSessionHandshake, FinalizeInputSessionHandshakeResponse>(
+                nCi, sig);
+        auto& [rc] = finalizeResponse;
+        if (error != TrustyAppError::OK || rc != TeeuiRc::OK) {
+            LOG(ERROR) << "Failed to finalize secure input handshake (" << int32_t(error) << "/"
+                       << uint32_t(rc) << ")";
+            rc = error != TrustyAppError::OK ? TeeuiRc::SystemError : rc;
+        }
+        return rc;
+    };
+
+    auto deliverInput = [&](DTupKeyEvent event,
+                            const Signature& sig) -> std::tuple<TeeuiRc, InputResponse> {
+        auto [error, result] =
+            app->issueCmd<DeliverInputEvent, DeliverInputEventResponse>(event, sig);
+        auto& [rc, ir] = result;
+        if (error != TrustyAppError::OK) {
+            LOG(ERROR) << "Failed to deliver input command";
+            rc = TeeuiRc::SystemError;
+        }
+        return result;
+    };
+
+    std::atomic<TeeuiRc> eventRC = TeeuiRc::OperationPending;
+    auto inputResult = [&](TeeuiRc rc) {
+        TeeuiRc expected = TeeuiRc::OperationPending;
+        if (eventRC.compare_exchange_strong(expected, rc)) {
+            listener_state_condv_.notify_all();
+        }
+    };
+
+    // create Secure Input device.
+    auto secureInput = createSecureInput(hsBegin, hsFinalize, deliverInput, inputResult);
+    if (!secureInput || !(*secureInput)) {
+        LOG(ERROR) << "Failed to open secure input device";
+        return result;  // TeeuiRc::SystemError;
+    }
+
+    Finalize finalizeConfirmationPrompt([app] {
+        LOG(INFO) << "Calling abort for cleanup";
+        app->issueCmd<AbortMsg>();
+    });
+
+    // initiate prompt
+    LOG(INFO) << "Initiating prompt";
+    TrustyAppError error;
+    auto initResponse = std::tie(rc);
+    std::tie(error, initResponse) =
+        app->issueCmd<PromptUserConfirmationMsg, PromptUserConfirmationResponse>(
+            promptText, extraData, locale, uiOptions);
+    if (error == TrustyAppError::MSG_TOO_LONG) {
+        LOG(ERROR) << "PromptUserConfirmationMsg failed: message too long";
+        rc = TeeuiRc::UIErrorMessageTooLong;
+        return result;
+    } else if (error != TrustyAppError::OK) {
+        LOG(ERROR) << "PromptUserConfirmationMsg failed: " << int32_t(error);
+        return result;  // TeeuiRc::SystemError;
+    }
+    if (rc != TeeuiRc::OK) {
+        LOG(ERROR) << "PromptUserConfirmationMsg failed: " << uint32_t(rc);
+        return result;
+    }
+
+    LOG(INFO) << "Grabbing event devices";
+    EventLoop eventloop;
+    bool grabbed =
+        grabAllEvDevsAndRegisterCallbacks(&eventloop, [&](short flags, const EventDev& evDev) {
+            if (!(flags & POLLIN)) return;
+            secureInput->handleEvent(evDev);
+        });
+
+    if (!grabbed) {
+        rc = TeeuiRc::SystemError;
+        return result;
+    }
+
+    abort_called_ = false;
+    secureInputDelivered_ = false;
+
+    //  ############################## Start 2nd Phase #############################################
+    listener_state_ = ListenerState::SetupDone;
+    stateLock.unlock();
+    listener_state_condv_.notify_all();
+
+    if (!eventloop.start()) {
+        rc = TeeuiRc::SystemError;
+        return result;
+    }
+
+    stateLock.lock();
+
+    LOG(INFO) << "going to sleep for the grace period";
+    auto then = std::chrono::system_clock::now() +
+                std::chrono::milliseconds(kUserPreInputGracePeriodMillis) +
+                std::chrono::microseconds(50);
+    listener_state_condv_.wait_until(stateLock, then, [&]() { return abort_called_; });
+    LOG(INFO) << "waking up";
+
+    if (abort_called_) {
+        LOG(ERROR) << "Abort called";
+        result = {TeeuiRc::Aborted, {}, {}};
+        return result;
+    }
+
+    LOG(INFO) << "Arming event poller";
+    // tell the event poller to act on received input events from now on.
+    secureInput->start();
+
+    //  ############################## Start 3rd Phase - interactive phase #########################
+    LOG(INFO) << "Transition to Interactive";
+    listener_state_ = ListenerState::Interactive;
+    stateLock.unlock();
+    listener_state_condv_.notify_all();
+
+    stateLock.lock();
+    listener_state_condv_.wait(stateLock, [&]() {
+        return eventRC != TeeuiRc::OperationPending || abort_called_ || secureInputDelivered_;
+    });
+    LOG(INFO) << "Listener waking up";
+    if (abort_called_) {
+        LOG(ERROR) << "Abort called";
+        result = {TeeuiRc::Aborted, {}, {}};
+        return result;
+    }
+
+    if (!secureInputDelivered_) {
+        if (eventRC != TeeuiRc::OK) {
+            LOG(ERROR) << "Bad input response";
+            result = {eventRC, {}, {}};
+            return result;
+        }
+    }
+
+    stateLock.unlock();
+
+    LOG(INFO) << "Fetching Result";
+    std::tie(error, result) = app->issueCmd<FetchConfirmationResult, ResultMsg>();
+    LOG(INFO) << "Result yields " << int32_t(error) << "/" << uint32_t(rc);
+    if (error != TrustyAppError::OK) {
+        result = {TeeuiRc::SystemError, {}, {}};
+    }
+    return result;
+
+    //  ############################## Start 4th Phase - cleanup ##################################
+}
+
+// Methods from ::android::hardware::confirmationui::V1_0::IConfirmationUI
+// follow.
+Return<ResponseCode> TrustyConfirmationUI::promptUserConfirmation(
+    const sp<IConfirmationResultCallback>& resultCB, const hidl_string& promptText,
+    const hidl_vec<uint8_t>& extraData, const hidl_string& locale,
+    const hidl_vec<UIOption>& uiOptions) {
+    std::unique_lock<std::mutex> stateLock(listener_state_lock_, std::defer_lock);
+    if (!stateLock.try_lock()) {
+        return ResponseCode::OperationPending;
+    }
+    switch (listener_state_) {
+    case ListenerState::None:
+        break;
+    case ListenerState::Starting:
+    case ListenerState::SetupDone:
+    case ListenerState::Interactive:
+        return ResponseCode::OperationPending;
+    case ListenerState::Terminating:
+        callback_thread_.join();
+        listener_state_ = ListenerState::None;
+        break;
+    default:
+        return ResponseCode::Unexpected;
+    }
+
+    assert(listener_state_ == ListenerState::None);
+
+    callback_thread_ = std::thread(
+        [this](sp<IConfirmationResultCallback> resultCB, hidl_string promptText,
+               hidl_vec<uint8_t> extraData, hidl_string locale, hidl_vec<UIOption> uiOptions) {
+            auto [trc, msg, token] =
+                promptUserConfirmation_(hidl2MsgString(promptText), hidl2MsgVector(extraData),
+                                        hidl2MsgString(locale), hidl2MsgVector(uiOptions));
+            bool do_callback = (listener_state_ == ListenerState::Interactive ||
+                                listener_state_ == ListenerState::SetupDone) &&
+                               resultCB;
+            prompt_result_ = convertRc(trc);
+            listener_state_ = ListenerState::Terminating;
+            if (do_callback) {
+                auto error = resultCB->result(prompt_result_, msg, token);
+                if (!error.isOk()) {
+                    LOG(ERROR) << "Result callback failed " << error.description();
+                }
+            } else {
+                listener_state_condv_.notify_all();
+            }
+        },
+        resultCB, promptText, extraData, locale, uiOptions);
+
+    listener_state_condv_.wait(stateLock, [this] {
+        return listener_state_ == ListenerState::SetupDone ||
+               listener_state_ == ListenerState::Interactive ||
+               listener_state_ == ListenerState::Terminating;
+    });
+    if (listener_state_ == ListenerState::Terminating) {
+        callback_thread_.join();
+        listener_state_ = ListenerState::None;
+        return prompt_result_;
+    }
+    return ResponseCode::OK;
+}
+
+Return<ResponseCode>
+TrustyConfirmationUI::deliverSecureInputEvent(const HardwareAuthToken& secureInputToken) {
+    ResponseCode rc = ResponseCode::Ignored;
+    {
+        /*
+         * deliverSecureInputEvent is only used by the VTS test to mock human input. A correct
+         * implementation responds with a mock confirmation token signed with a test key. The
+         * problem is that the non interactive grace period was not formalized in the HAL spec,
+         * so that the VTS test does not account for the grace period. (It probably should.)
+         * This means we can only pass the VTS test if we block until the grace period is over
+         * (SetupDone -> Interactive) before we deliver the input event.
+         *
+         * The true secure input is delivered by a different mechanism and gets ignored -
+         * not queued - until the grace period is over.
+         *
+         */
+        std::unique_lock<std::mutex> stateLock(listener_state_lock_);
+        listener_state_condv_.wait(stateLock,
+                                   [this] { return listener_state_ != ListenerState::SetupDone; });
+
+        if (listener_state_ != ListenerState::Interactive) return ResponseCode::Ignored;
+        auto sapp = app_.lock();
+        if (!sapp) return ResponseCode::Ignored;
+        auto [error, response] =
+            sapp->issueCmd<DeliverTestCommandMessage, DeliverTestCommandResponse>(
+                static_cast<teeui::TestModeCommands>(secureInputToken.challenge));
+        if (error != TrustyAppError::OK) return ResponseCode::SystemError;
+        auto& [trc] = response;
+        if (trc != TeeuiRc::Ignored) secureInputDelivered_ = true;
+        rc = convertRc(trc);
+    }
+    if (secureInputDelivered_) listener_state_condv_.notify_all();
+    // VTS test expect an OK response if the event was successfully delivered.
+    // But since the TA returns the callback response now, we have to translate
+    // Canceled into OK. Canceled is only returned if the delivered event canceled
+    // the operation, which means that the event was successfully delivered. Thus
+    // we return OK.
+    if (rc == ResponseCode::Canceled) return ResponseCode::OK;
+    return rc;
+}
+
+Return<void> TrustyConfirmationUI::abort() {
+    {
+        std::unique_lock<std::mutex> stateLock(listener_state_lock_);
+        if (listener_state_ == ListenerState::SetupDone ||
+            listener_state_ == ListenerState::Interactive) {
+            auto sapp = app_.lock();
+            if (sapp) sapp->issueCmd<AbortMsg>();
+            abort_called_ = true;
+        }
+    }
+    listener_state_condv_.notify_all();
+    return Void();
+}
+
+android::sp<IConfirmationUI> createTrustyConfirmationUI() {
+    return new TrustyConfirmationUI();
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace confirmationui
+}  // namespace hardware
+}  // namespace android
diff --git a/trusty/confirmationui/TrustyConfirmationUI.h b/trusty/confirmationui/TrustyConfirmationUI.h
new file mode 100644
index 0000000..3a7c7ef
--- /dev/null
+++ b/trusty/confirmationui/TrustyConfirmationUI.h
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
+#define ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
+
+#include <android/hardware/confirmationui/1.0/IConfirmationUI.h>
+#include <android/hardware/keymaster/4.0/types.h>
+#include <hidl/Status.h>
+
+#include <atomic>
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <teeui/generic_messages.h>
+#include <thread>
+
+#include "TrustyApp.h"
+
+namespace android {
+namespace hardware {
+namespace confirmationui {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+
+using ::android::trusty::TrustyApp;
+
+class TrustyConfirmationUI : public IConfirmationUI {
+  public:
+    TrustyConfirmationUI();
+    virtual ~TrustyConfirmationUI();
+    // Methods from ::android::hardware::confirmationui::V1_0::IConfirmationUI
+    // follow.
+    Return<ResponseCode> promptUserConfirmation(const sp<IConfirmationResultCallback>& resultCB,
+                                                const hidl_string& promptText,
+                                                const hidl_vec<uint8_t>& extraData,
+                                                const hidl_string& locale,
+                                                const hidl_vec<UIOption>& uiOptions) override;
+    Return<ResponseCode> deliverSecureInputEvent(
+        const ::android::hardware::keymaster::V4_0::HardwareAuthToken& secureInputToken) override;
+    Return<void> abort() override;
+
+  private:
+    std::weak_ptr<TrustyApp> app_;
+    std::thread callback_thread_;
+
+    enum class ListenerState : uint32_t {
+        None,
+        Starting,
+        SetupDone,
+        Interactive,
+        Terminating,
+    };
+
+    /*
+     * listener_state is protected by listener_state_lock. It makes transitions between phases
+     * of the confirmation operation atomic.
+     * (See TrustyConfirmationUI.cpp#promptUserConfirmation_ for details about operation phases)
+     */
+    ListenerState listener_state_;
+    /*
+     * abort_called_ is also protected by listener_state_lock_ and indicates that the HAL user
+     * called abort.
+     */
+    bool abort_called_;
+    std::mutex listener_state_lock_;
+    std::condition_variable listener_state_condv_;
+    ResponseCode prompt_result_;
+    bool secureInputDelivered_;
+
+    std::tuple<teeui::ResponseCode, teeui::MsgVector<uint8_t>, teeui::MsgVector<uint8_t>>
+    promptUserConfirmation_(const teeui::MsgString& promptText,
+                            const teeui::MsgVector<uint8_t>& extraData,
+                            const teeui::MsgString& locale,
+                            const teeui::MsgVector<teeui::UIOption>& uiOptions);
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace confirmationui
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_CONFIRMATIONUI_V1_0_TRUSTY_CONFIRMATIONUI_H
diff --git a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc b/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc
new file mode 100644
index 0000000..dc7a03b
--- /dev/null
+++ b/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.rc
@@ -0,0 +1,4 @@
+service confirmationui-1-0 /vendor/bin/hw/android.hardware.confirmationui@1.0-service.trusty
+    class hal
+    user nobody
+    group drmrpc input
diff --git a/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml b/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml
new file mode 100644
index 0000000..9008b87
--- /dev/null
+++ b/trusty/confirmationui/android.hardware.confirmationui@1.0-service.trusty.xml
@@ -0,0 +1,11 @@
+<manifest version="1.0" type="device">
+    <hal format="hidl">
+        <name>android.hardware.confirmationui</name>
+        <transport>hwbinder</transport>
+        <version>1.0</version>
+        <interface>
+        <name>IConfirmationUI</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+</manifest>
diff --git a/trusty/confirmationui/include/TrustyConfirmationuiHal.h b/trusty/confirmationui/include/TrustyConfirmationuiHal.h
new file mode 100644
index 0000000..2ab9389
--- /dev/null
+++ b/trusty/confirmationui/include/TrustyConfirmationuiHal.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android/hardware/confirmationui/1.0/IConfirmationUI.h>
+
+namespace android {
+namespace hardware {
+namespace confirmationui {
+namespace V1_0 {
+namespace implementation {
+
+android::sp<IConfirmationUI> createTrustyConfirmationUI();
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace confirmationui
+}  // namespace hardware
+}  // namespace android
diff --git a/trusty/confirmationui/service.cpp b/trusty/confirmationui/service.cpp
new file mode 100644
index 0000000..dd7e84b
--- /dev/null
+++ b/trusty/confirmationui/service.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2020, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/logging.h>
+#include <hidl/HidlTransportSupport.h>
+
+#include <TrustyConfirmationuiHal.h>
+
+using android::sp;
+using android::hardware::confirmationui::V1_0::implementation::createTrustyConfirmationUI;
+
+int main() {
+    ::android::hardware::configureRpcThreadpool(1, true /*willJoinThreadpool*/);
+    auto service = createTrustyConfirmationUI();
+    auto status = service->registerAsService();
+    if (status != android::OK) {
+        LOG(FATAL) << "Could not register service for ConfirmationUI 1.0 (" << status << ")";
+        return -1;
+    }
+    ::android::hardware::joinRpcThreadpool();
+    return -1;
+}
diff --git a/trusty/libtrusty/Android.bp b/trusty/libtrusty/Android.bp
index f6e9bee..8dba78d 100644
--- a/trusty/libtrusty/Android.bp
+++ b/trusty/libtrusty/Android.bp
@@ -12,10 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-subdirs = [
-    "tipc-test",
-]
-
 cc_library {
     name: "libtrusty",
     vendor: true,
diff --git a/trusty/storage/proxy/proxy.c b/trusty/storage/proxy/proxy.c
index c61f7d0..e230941 100644
--- a/trusty/storage/proxy/proxy.c
+++ b/trusty/storage/proxy/proxy.c
@@ -46,6 +46,10 @@
         return MMC_RPMB;
     } else if (!strcmp(dev_type_name, "virt")) {
         return VIRT_RPMB;
+    } else if (!strcmp(dev_type_name, "sock")) {
+        return SOCK_RPMB;
+    } else if (!strcmp(dev_type_name, "ufs")) {
+        return UFS_RPMB;
     } else {
         return UNKNOWN_RPMB;
     }
diff --git a/trusty/storage/proxy/rpmb.c b/trusty/storage/proxy/rpmb.c
index 29827e2..7dfd0d0 100644
--- a/trusty/storage/proxy/rpmb.c
+++ b/trusty/storage/proxy/rpmb.c
@@ -16,11 +16,14 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <scsi/sg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
 #include <unistd.h>
 
 #include <linux/major.h>
@@ -49,6 +52,50 @@
 
 #define MMC_BLOCK_SIZE 512
 
+/*
+ * There should be no timeout for security protocol ioctl call, so we choose a
+ * large number for timeout.
+ * 20000 millisecs == 20 seconds
+ */
+#define TIMEOUT 20000
+
+/*
+ * The sg device driver that supports new interface has a major version number of "3".
+ * SG_GET_VERSION_NUM ioctl() will yield a number greater than or 30000.
+ */
+#define RPMB_MIN_SG_VERSION_NUM 30000
+
+/*
+ * CDB format of SECURITY PROTOCOL IN/OUT commands
+ * (JEDEC Standard No. 220D, Page 264)
+ */
+struct sec_proto_cdb {
+    /*
+     * OPERATION CODE = A2h for SECURITY PROTOCOL IN command,
+     * OPERATION CODE = B5h for SECURITY PROTOCOL OUT command.
+     */
+    uint8_t opcode;
+    /* SECURITY PROTOCOL = ECh (JEDEC Universal Flash Storage) */
+    uint8_t sec_proto;
+    /*
+     * The SECURITY PROTOCOL SPECIFIC field specifies the RPMB Protocol ID.
+     * CDB Byte 2 = 00h and CDB Byte 3 = 01h for RPMB Region 0.
+     */
+    uint8_t cdb_byte_2;
+    uint8_t cdb_byte_3;
+    /*
+     * Byte 4 and 5 are reserved.
+     */
+    uint8_t cdb_byte_4;
+    uint8_t cdb_byte_5;
+    /* ALLOCATION/TRANSFER LENGTH in big-endian */
+    uint32_t length;
+    /* Byte 9 is reserved. */
+    uint8_t cdb_byte_10;
+    /* CONTROL = 00h. */
+    uint8_t ctrl;
+} __packed;
+
 static int rpmb_fd = -1;
 static uint8_t read_buf[4096];
 static enum dev_type dev_type = UNKNOWN_RPMB;
@@ -69,6 +116,21 @@
 
 #endif
 
+static void set_sg_io_hdr(sg_io_hdr_t* io_hdrp, int dxfer_direction, unsigned char cmd_len,
+                          unsigned char mx_sb_len, unsigned int dxfer_len, void* dxferp,
+                          unsigned char* cmdp, void* sbp) {
+    memset(io_hdrp, 0, sizeof(sg_io_hdr_t));
+    io_hdrp->interface_id = 'S';
+    io_hdrp->dxfer_direction = dxfer_direction;
+    io_hdrp->cmd_len = cmd_len;
+    io_hdrp->mx_sb_len = mx_sb_len;
+    io_hdrp->dxfer_len = dxfer_len;
+    io_hdrp->dxferp = dxferp;
+    io_hdrp->cmdp = cmdp;
+    io_hdrp->sbp = sbp;
+    io_hdrp->timeout = TIMEOUT;
+}
+
 static int send_mmc_rpmb_req(int mmc_fd, const struct storage_rpmb_send_req* req) {
     struct {
         struct mmc_ioc_multi_cmd multi;
@@ -130,6 +192,57 @@
     return rc;
 }
 
+static int send_ufs_rpmb_req(int sg_fd, const struct storage_rpmb_send_req* req) {
+    int rc;
+    const uint8_t* write_buf = req->payload;
+    /*
+     * Meaning of member values are stated on the definition of struct sec_proto_cdb.
+     */
+    struct sec_proto_cdb in_cdb = {0xA2, 0xEC, 0x00, 0x01, 0x00, 0x00, 0, 0x00, 0x00};
+    struct sec_proto_cdb out_cdb = {0xB5, 0xEC, 0x00, 0x01, 0x00, 0x00, 0, 0x00, 0x00};
+    unsigned char sense_buffer[32];
+
+    if (req->reliable_write_size) {
+        /* Prepare SECURITY PROTOCOL OUT command. */
+        out_cdb.length = __builtin_bswap32(req->reliable_write_size);
+        sg_io_hdr_t io_hdr;
+        set_sg_io_hdr(&io_hdr, SG_DXFER_TO_DEV, sizeof(out_cdb), sizeof(sense_buffer),
+                      req->reliable_write_size, (void*)write_buf, (unsigned char*)&out_cdb,
+                      sense_buffer);
+        rc = ioctl(sg_fd, SG_IO, &io_hdr);
+        if (rc < 0) {
+            ALOGE("%s: ufs ioctl failed: %d, %s\n", __func__, rc, strerror(errno));
+        }
+        write_buf += req->reliable_write_size;
+    }
+
+    if (req->write_size) {
+        /* Prepare SECURITY PROTOCOL OUT command. */
+        out_cdb.length = __builtin_bswap32(req->write_size);
+        sg_io_hdr_t io_hdr;
+        set_sg_io_hdr(&io_hdr, SG_DXFER_TO_DEV, sizeof(out_cdb), sizeof(sense_buffer),
+                      req->write_size, (void*)write_buf, (unsigned char*)&out_cdb, sense_buffer);
+        rc = ioctl(sg_fd, SG_IO, &io_hdr);
+        if (rc < 0) {
+            ALOGE("%s: ufs ioctl failed: %d, %s\n", __func__, rc, strerror(errno));
+        }
+        write_buf += req->write_size;
+    }
+
+    if (req->read_size) {
+        /* Prepare SECURITY PROTOCOL IN command. */
+        out_cdb.length = __builtin_bswap32(req->read_size);
+        sg_io_hdr_t io_hdr;
+        set_sg_io_hdr(&io_hdr, SG_DXFER_FROM_DEV, sizeof(in_cdb), sizeof(sense_buffer),
+                      req->read_size, read_buf, (unsigned char*)&in_cdb, sense_buffer);
+        rc = ioctl(sg_fd, SG_IO, &io_hdr);
+        if (rc < 0) {
+            ALOGE("%s: ufs ioctl failed: %d, %s\n", __func__, rc, strerror(errno));
+        }
+    }
+    return rc;
+}
+
 static int send_virt_rpmb_req(int rpmb_fd, void* read_buf, size_t read_size, const void* payload,
                               size_t payload_size) {
     int rc;
@@ -192,7 +305,14 @@
             msg->result = STORAGE_ERR_GENERIC;
             goto err_response;
         }
-    } else if (dev_type == VIRT_RPMB) {
+    } else if (dev_type == UFS_RPMB) {
+        rc = send_ufs_rpmb_req(rpmb_fd, req);
+        if (rc < 0) {
+            ALOGE("send_ufs_rpmb_req failed: %d, %s\n", rc, strerror(errno));
+            msg->result = STORAGE_ERR_GENERIC;
+            goto err_response;
+        }
+    } else if ((dev_type == VIRT_RPMB) || (dev_type == SOCK_RPMB)) {
         size_t payload_size = req->reliable_write_size + req->write_size;
         rc = send_virt_rpmb_req(rpmb_fd, read_buf, req->read_size, req->payload, payload_size);
         if (rc < 0) {
@@ -231,15 +351,46 @@
 }
 
 int rpmb_open(const char* rpmb_devname, enum dev_type open_dev_type) {
-    int rc;
+    int rc, sg_version_num;
     dev_type = open_dev_type;
 
-    rc = open(rpmb_devname, O_RDWR, 0);
-    if (rc < 0) {
-        ALOGE("unable (%d) to open rpmb device '%s': %s\n", errno, rpmb_devname, strerror(errno));
-        return rc;
+    if (dev_type != SOCK_RPMB) {
+        rc = open(rpmb_devname, O_RDWR, 0);
+        if (rc < 0) {
+            ALOGE("unable (%d) to open rpmb device '%s': %s\n", errno, rpmb_devname, strerror(errno));
+            return rc;
+        }
+        rpmb_fd = rc;
+
+        /* For UFS, it is prudent to check we have a sg device by calling an ioctl */
+        if (dev_type == UFS_RPMB) {
+            if ((ioctl(rpmb_fd, SG_GET_VERSION_NUM, &sg_version_num) < 0) ||
+                (sg_version_num < RPMB_MIN_SG_VERSION_NUM)) {
+                ALOGE("%s is not a sg device, or old sg driver\n", rpmb_devname);
+                return -1;
+            }
+        }
+    } else {
+        struct sockaddr_un unaddr;
+        struct sockaddr *addr = (struct sockaddr *)&unaddr;
+        rc = socket(AF_UNIX, SOCK_STREAM, 0);
+        if (rc < 0) {
+            ALOGE("unable (%d) to create socket: %s\n", errno, strerror(errno));
+            return rc;
+        }
+        rpmb_fd = rc;
+
+        memset(&unaddr, 0, sizeof(unaddr));
+        unaddr.sun_family = AF_UNIX;
+        // TODO if it overflowed, bail rather than connecting?
+        strncpy(unaddr.sun_path, rpmb_devname, sizeof(unaddr.sun_path)-1);
+        rc = connect(rpmb_fd, addr, sizeof(unaddr));
+        if (rc < 0) {
+            ALOGE("unable (%d) to connect to rpmb socket '%s': %s\n", errno, rpmb_devname, strerror(errno));
+            return rc;
+        }
     }
-    rpmb_fd = rc;
+
     return 0;
 }
 
diff --git a/trusty/storage/proxy/rpmb.h b/trusty/storage/proxy/rpmb.h
index 4c330c9..f4e1b51 100644
--- a/trusty/storage/proxy/rpmb.h
+++ b/trusty/storage/proxy/rpmb.h
@@ -18,7 +18,7 @@
 #include <stdint.h>
 #include <trusty/interface/storage.h>
 
-enum dev_type { UNKNOWN_RPMB, MMC_RPMB, VIRT_RPMB };
+enum dev_type { UNKNOWN_RPMB, MMC_RPMB, VIRT_RPMB, UFS_RPMB, SOCK_RPMB };
 
 int rpmb_open(const char* rpmb_devname, enum dev_type dev_type);
 int rpmb_send(struct storage_msg* msg, const void* r, size_t req_len);
diff --git a/libmeminfo/libdmabufinfo/tools/Android.bp b/trusty/utils/rpmb_dev/Android.bp
similarity index 74%
rename from libmeminfo/libdmabufinfo/tools/Android.bp
rename to trusty/utils/rpmb_dev/Android.bp
index 224b68e..e923e82 100644
--- a/libmeminfo/libdmabufinfo/tools/Android.bp
+++ b/trusty/utils/rpmb_dev/Android.bp
@@ -2,8 +2,7 @@
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
+// You may obtain a copy of the License at //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
@@ -13,18 +12,22 @@
 // limitations under the License.
 
 cc_binary {
-    name: "dmabuf_dump",
+    name: "rpmb_dev",
+    vendor: true,
+
+    srcs: [
+        "rpmb_dev.c",
+    ],
+    shared_libs: [
+        "libc",
+        "liblog",
+        "libcrypto",
+    ],
     cflags: [
         "-Wall",
         "-Werror",
     ],
-
-    srcs: ["dmabuf_dump.cpp"],
-    shared_libs: [
-        "libbase",
+    init_rc: [
+        "rpmb_dev.rc",
     ],
-    static_libs: [
-        "libdmabufinfo",
-    ],
-    product_specific: true,
-}
\ No newline at end of file
+}
diff --git a/trusty/utils/rpmb_dev/rpmb.h b/trusty/utils/rpmb_dev/rpmb.h
new file mode 100644
index 0000000..ab7e8d8
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __RPMB_H__
+#define __RPMB_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct rpmb_key {
+    uint8_t byte[32];
+};
+
+struct rpmb_state;
+
+#define RPMB_BUF_SIZE 256
+
+/* provides */
+int rpmb_init(struct rpmb_state** statep,
+              void* mmc_handle,
+              const struct rpmb_key* key);
+void rpmb_uninit(struct rpmb_state* statep);
+int rpmb_read(struct rpmb_state* state,
+              void* buf,
+              uint16_t addr,
+              uint16_t count);
+/* count must be 1 or 2, addr must be aligned */
+int rpmb_write(struct rpmb_state* state,
+               const void* buf,
+               uint16_t addr,
+               uint16_t count,
+               bool sync);
+
+/* needs */
+int rpmb_send(void* mmc_handle,
+              void* reliable_write_buf,
+              size_t reliable_write_size,
+              void* write_buf,
+              size_t write_buf_size,
+              void* read_buf,
+              size_t read_buf_size,
+              bool sync);
+
+#endif
diff --git a/trusty/utils/rpmb_dev/rpmb_dev.c b/trusty/utils/rpmb_dev/rpmb_dev.c
new file mode 100644
index 0000000..af97eba
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_dev.c
@@ -0,0 +1,657 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define LOG_TAG "rpmb_mock"
+
+#include "rpmb_protocol.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <log/log.h>
+#include <openssl/hmac.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <unistd.h>
+
+/* verbose is an int for getopt */
+static int verbose = false;
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+
+HMAC_CTX* HMAC_CTX_new(void) {
+    HMAC_CTX* ctx = malloc(sizeof(*ctx));
+    if (ctx != NULL) {
+        HMAC_CTX_init(ctx);
+    }
+    return ctx;
+}
+
+void HMAC_CTX_free(HMAC_CTX* ctx) {
+    if (ctx != NULL) {
+        HMAC_CTX_cleanup(ctx);
+        free(ctx);
+    }
+}
+
+#endif
+
+#define MAX_WRITE_COUNTER (0xffffffff)
+
+struct rpmb_data_header {
+    uint32_t write_counter;
+    uint16_t max_block;
+    uint8_t pad1;
+    uint8_t key_programmed;
+    struct rpmb_key key;
+    uint8_t pad[512 - 4 - 2 - 1 - 1 - sizeof(struct rpmb_key)];
+};
+
+#define MAX_PACKET_COUNT (8)
+
+struct rpmb_dev_state {
+    struct rpmb_data_header header;
+    struct rpmb_packet cmd[MAX_PACKET_COUNT];
+    struct rpmb_packet res[MAX_PACKET_COUNT];
+    uint16_t cmd_count;
+    uint16_t res_count;
+    int data_fd;
+};
+
+/* TODO: move to common location */
+static int rpmb_mac(struct rpmb_key key, struct rpmb_packet* packet, size_t packet_count,
+                    struct rpmb_key* mac) {
+    size_t i;
+    int hmac_ret;
+    unsigned int md_len;
+    HMAC_CTX* hmac_ctx;
+
+    hmac_ctx = HMAC_CTX_new();
+    hmac_ret = HMAC_Init_ex(hmac_ctx, &key, sizeof(key), EVP_sha256(), NULL);
+    if (!hmac_ret) {
+        ALOGE("HMAC_Init_ex failed\n");
+        goto err;
+    }
+    for (i = 0; i < packet_count; i++) {
+        hmac_ret = HMAC_Update(hmac_ctx, packet[i].data, 284);
+        if (!hmac_ret) {
+            ALOGE("HMAC_Update failed\n");
+            goto err;
+        }
+    }
+    hmac_ret = HMAC_Final(hmac_ctx, mac->byte, &md_len);
+    if (md_len != sizeof(mac->byte)) {
+        ALOGE("bad md_len %d != %zd\n", md_len, sizeof(mac->byte));
+        exit(1);
+    }
+    if (!hmac_ret) {
+        ALOGE("HMAC_Final failed\n");
+        goto err;
+    }
+
+err:
+    HMAC_CTX_free(hmac_ctx);
+    return hmac_ret ? 0 : -1;
+}
+
+static int rpmb_file_seek(struct rpmb_dev_state* s, uint16_t addr) {
+    int ret;
+    int pos = addr * RPMB_PACKET_DATA_SIZE + sizeof(s->header);
+    ret = lseek(s->data_fd, pos, SEEK_SET);
+    if (ret != pos) {
+        ALOGE("rpmb_dev: seek to %d failed, got %d\n", pos, ret);
+        return -1;
+    }
+    return 0;
+}
+
+static uint16_t rpmb_dev_program_key(struct rpmb_dev_state* s) {
+    int ret;
+
+    if (s->header.key_programmed) {
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    s->header.key = s->cmd[0].key_mac;
+    s->header.key_programmed = 1;
+
+    ret = lseek(s->data_fd, 0, SEEK_SET);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    ret = write(s->data_fd, &s->header, sizeof(s->header));
+    if (ret != sizeof(s->header)) {
+        ALOGE("rpmb_dev: Failed to write rpmb key: %d, %s\n", ret, strerror(errno));
+
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_get_counter(struct rpmb_dev_state* s) {
+    s->res[0].write_counter = rpmb_u32(s->header.write_counter);
+
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_data_write(struct rpmb_dev_state* s) {
+    uint16_t addr = rpmb_get_u16(s->cmd[0].address);
+    uint16_t block_count = s->cmd_count;
+    uint32_t write_counter;
+    int ret;
+
+    if (s->header.write_counter == MAX_WRITE_COUNTER) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Write counter expired\n");
+        }
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    write_counter = rpmb_get_u32(s->cmd[0].write_counter);
+    if (s->header.write_counter != write_counter) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Invalid write counter %u. Expected: %u\n", write_counter,
+                  s->header.write_counter);
+        }
+        return RPMB_RES_COUNT_FAILURE;
+    }
+
+    ret = rpmb_file_seek(s, addr);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    for (int i = 0; i < block_count; i++) {
+        ret = write(s->data_fd, s->cmd[i].data, RPMB_PACKET_DATA_SIZE);
+        if (ret != RPMB_PACKET_DATA_SIZE) {
+            ALOGE("rpmb_dev: Failed to write rpmb data file: %d, %s\n", ret, strerror(errno));
+            return RPMB_RES_WRITE_FAILURE;
+        }
+    }
+
+    s->header.write_counter++;
+
+    ret = lseek(s->data_fd, 0, SEEK_SET);
+    if (ret) {
+        ALOGE("rpmb_dev: Failed to seek rpmb data file\n");
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    ret = write(s->data_fd, &s->header.write_counter, sizeof(s->header.write_counter));
+    if (ret != sizeof(s->header.write_counter)) {
+        ALOGE("rpmb_dev: Failed to write rpmb write counter: %d, %s\n", ret, strerror(errno));
+
+        return RPMB_RES_WRITE_FAILURE;
+    }
+
+    s->res[0].write_counter = rpmb_u32(s->header.write_counter);
+    return RPMB_RES_OK;
+}
+
+static uint16_t rpmb_dev_data_read(struct rpmb_dev_state* s) {
+    uint16_t addr;
+    uint16_t block_count;
+    int ret;
+
+    addr = rpmb_get_u16(s->cmd[0].address);
+    block_count = s->res_count;
+
+    rpmb_file_seek(s, addr);
+
+    for (int i = 0; i < block_count; i++) {
+        ret = read(s->data_fd, s->res[i].data, RPMB_PACKET_DATA_SIZE);
+        if (ret != 0 && ret != RPMB_PACKET_DATA_SIZE) {
+            ALOGE("rpmb_dev: Failed to read rpmb data file: %d, %s\n", ret, strerror(errno));
+            return RPMB_RES_READ_FAILURE;
+        }
+    }
+
+    return RPMB_RES_OK;
+}
+
+struct rpmb_dev_cmd {
+    uint16_t (*func)(struct rpmb_dev_state* s);
+    uint16_t resp;
+    bool key_mac_is_key;
+    bool check_mac;
+    bool check_result_read;
+    bool check_key_programmed;
+    bool check_addr;
+    bool multi_packet_cmd;
+    bool multi_packet_res;
+    bool res_mac;
+};
+
+static struct rpmb_dev_cmd rpmb_dev_cmd_table[] = {
+        [RPMB_REQ_PROGRAM_KEY] =
+                {
+                        .func = rpmb_dev_program_key,
+                        .resp = RPMB_RESP_PROGRAM_KEY,
+                        .key_mac_is_key = true,
+                        .check_result_read = true,
+                },
+        [RPMB_REQ_GET_COUNTER] =
+                {
+                        .func = rpmb_dev_get_counter,
+                        .resp = RPMB_RESP_GET_COUNTER,
+                        .check_key_programmed = true,
+                        .res_mac = true,
+                },
+        [RPMB_REQ_DATA_WRITE] =
+                {
+                        .func = rpmb_dev_data_write,
+                        .resp = RPMB_RESP_DATA_WRITE,
+                        .check_mac = true,
+                        .check_result_read = true,
+                        .check_key_programmed = true,
+                        .check_addr = true,
+                        .multi_packet_cmd = true,
+                        .res_mac = true,
+                },
+        [RPMB_REQ_DATA_READ] =
+                {
+                        .func = rpmb_dev_data_read,
+                        .resp = RPMB_RESP_DATA_READ,
+                        .check_addr = true,
+                        .multi_packet_res = true,
+                        .res_mac = true,
+                },
+};
+
+#define countof(arr) (sizeof(arr) / sizeof(arr[0]))
+
+static void rpmb_dev_process_cmd(struct rpmb_dev_state* s) {
+    assert(s->cmd_count > 0);
+    assert(s->res_count > 0);
+    uint16_t req_resp = rpmb_get_u16(s->cmd[0].req_resp);
+    uint16_t addr = rpmb_get_u16(s->cmd[0].address);
+    uint16_t sub_req;
+    uint16_t cmd_index = req_resp < countof(rpmb_dev_cmd_table) ? req_resp : 0;
+    struct rpmb_dev_cmd* cmd = &rpmb_dev_cmd_table[cmd_index];
+    uint16_t result = RPMB_RES_GENERAL_FAILURE;
+    struct rpmb_key mac;
+    uint16_t block_count = 0;
+
+    if (cmd->check_result_read) {
+        sub_req = rpmb_get_u16(s->cmd[s->cmd_count - 1].req_resp);
+        if (sub_req != RPMB_REQ_RESULT_READ) {
+            if (verbose) {
+                ALOGE("rpmb_dev: Request %d, missing result read request, got %d, cmd_count %d\n",
+                      req_resp, sub_req, s->cmd_count);
+            }
+            goto err;
+        }
+        assert(s->cmd_count > 1);
+        s->cmd_count--;
+    }
+
+    if (cmd->check_mac) {
+        if (rpmb_mac(s->header.key, s->cmd, s->cmd_count, &mac) != 0) {
+            ALOGE("rpmb_dev: failed to caclulate mac\n");
+            goto err;
+        }
+    } else if (cmd->key_mac_is_key) {
+        mac = s->cmd[s->cmd_count - 1].key_mac;
+    } else {
+        memset(mac.byte, 0, sizeof(mac.byte));
+    }
+
+    if (memcmp(&mac, s->cmd[s->cmd_count - 1].key_mac.byte, sizeof(mac))) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid MAC, cmd_count %d\n", req_resp, s->cmd_count);
+        }
+        if (cmd->check_mac) {
+            result = RPMB_RES_AUTH_FAILURE;
+        }
+        goto err;
+    }
+
+    if (cmd->multi_packet_cmd) {
+        block_count = s->cmd_count;
+    }
+    if (cmd->multi_packet_res) {
+        block_count = s->res_count;
+    }
+
+    if (cmd->check_addr && (addr + block_count > s->header.max_block + 1)) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid addr: 0x%x count 0x%x, Out of bounds. Max addr "
+                  "0x%x\n",
+                  req_resp, addr, block_count, s->header.max_block + 1);
+        }
+        result = RPMB_RES_ADDR_FAILURE;
+        goto err;
+    }
+    if (!cmd->check_addr && addr) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, invalid addr: 0x%x != 0\n", req_resp, addr);
+        }
+        goto err;
+    }
+
+    for (int i = 1; i < s->cmd_count; i++) {
+        sub_req = rpmb_get_u16(s->cmd[i].req_resp);
+        if (sub_req != req_resp) {
+            if (verbose) {
+                ALOGE("rpmb_dev: Request %d, sub-request mismatch, %d, at %d\n", req_resp, i,
+                      sub_req);
+            }
+            goto err;
+        }
+    }
+    if (!cmd->multi_packet_cmd && s->cmd_count != 1) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, bad cmd count %d, expected 1\n", req_resp, s->cmd_count);
+        }
+        goto err;
+    }
+    if (!cmd->multi_packet_res && s->res_count != 1) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, bad res count %d, expected 1\n", req_resp, s->res_count);
+        }
+        goto err;
+    }
+
+    if (cmd->check_key_programmed && !s->header.key_programmed) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Request %d, key is not programmed\n", req_resp);
+        }
+        s->res[0].result = rpmb_u16(RPMB_RES_NO_AUTH_KEY);
+        return;
+    }
+
+    if (!cmd->func) {
+        if (verbose) {
+            ALOGE("rpmb_dev: Unsupported request: %d\n", req_resp);
+        }
+        goto err;
+    }
+
+    result = cmd->func(s);
+
+err:
+    if (s->header.write_counter == MAX_WRITE_COUNTER) {
+        result |= RPMB_RES_WRITE_COUNTER_EXPIRED;
+    }
+
+    for (int i = 0; i < s->res_count; i++) {
+        s->res[i].nonce = s->cmd[0].nonce;
+        s->res[i].address = rpmb_u16(addr);
+        s->res[i].block_count = rpmb_u16(block_count);
+        s->res[i].result = rpmb_u16(result);
+        s->res[i].req_resp = rpmb_u16(cmd->resp);
+    }
+    if (cmd->res_mac) {
+        rpmb_mac(s->header.key, s->res, s->res_count, &s->res[s->res_count - 1].key_mac);
+    }
+}
+
+/*
+ * Receives data until one of the following is true:
+ * - The buffer is full (return will be len)
+ * - The connection closed (return > 0, < len)
+ * - An error occurred (return will be the negative error code from recv)
+ */
+ssize_t recv_until(int sock, void* dest_in, size_t len) {
+    size_t bytes_recvd = 0;
+    char* dest = dest_in;
+    while (bytes_recvd < len) {
+        ssize_t ret = recv(sock, dest, len - bytes_recvd, 0);
+        if (ret < 0) {
+            return ret;
+        }
+        dest += ret;
+        bytes_recvd += ret;
+        if (ret == 0) {
+            break;
+        }
+    }
+    return bytes_recvd;
+}
+
+/*
+ * Handles an incoming connection to the rpmb daemon.
+ * Returns 0 if the client disconnects without violating the protocol.
+ * Returns a negative value if we terminated the connection abnormally.
+ *
+ * Arguments:
+ *   conn_sock - an fd to send/recv on
+ *   s - an initialized rpmb device
+ */
+int handle_conn(struct rpmb_dev_state* s, int conn_sock) {
+    int ret;
+
+    while (true) {
+        memset(s->res, 0, sizeof(s->res));
+        ret = recv_until(conn_sock, &s->res_count, sizeof(s->res_count));
+
+        /*
+         * Disconnected while not in the middle of anything.
+         */
+        if (ret <= 0) {
+            return 0;
+        }
+
+        if (s->res_count > MAX_PACKET_COUNT) {
+            ALOGE("rpmb_dev: Receive count too large: %d\n", s->res_count);
+            return -1;
+        }
+        if (s->res_count <= 0) {
+            ALOGE("rpmb_dev: Receive count too small: %d\n", s->res_count);
+            return -1;
+        }
+
+        ret = recv_until(conn_sock, &s->cmd_count, sizeof(s->cmd_count));
+        if (ret != sizeof(s->cmd_count)) {
+            ALOGE("rpmb_dev: Failed to read cmd_count");
+            return -1;
+        }
+
+        if (s->cmd_count == 0) {
+            ALOGE("rpmb_dev: Must contain at least one command\n");
+            return -1;
+        }
+
+        if (s->cmd_count > MAX_PACKET_COUNT) {
+            ALOGE("rpmb_dev: Command count is too large\n");
+            return -1;
+        }
+
+        size_t cmd_size = s->cmd_count * sizeof(s->cmd[0]);
+        ret = recv_until(conn_sock, s->cmd, cmd_size);
+        if (ret != (int)cmd_size) {
+            ALOGE("rpmb_dev: Failed to read command: "
+                  "cmd_size: %zu ret: %d, %s\n",
+                  cmd_size, ret, strerror(errno));
+            return -1;
+        }
+
+        rpmb_dev_process_cmd(s);
+
+        size_t resp_size = sizeof(s->res[0]) * s->res_count;
+        ret = send(conn_sock, s->res, resp_size, 0);
+        if (ret != (int)resp_size) {
+            ALOGE("rpmb_dev: Failed to send response: %d, %s\n", ret, strerror(errno));
+            return -1;
+        }
+    }
+}
+
+void usage(const char* argv0) {
+    fprintf(stderr, "Usage: %s [-d|--dev] <datafile> [--sock] <socket_path>\n", argv0);
+    fprintf(stderr, "or:    %s [-d|--dev] <datafile> [--size <size>] [--key key]\n", argv0);
+}
+
+int main(int argc, char** argv) {
+    struct rpmb_dev_state s;
+    int ret;
+    int cmdres_sock;
+    struct sockaddr_un cmdres_sockaddr;
+    const char* data_file_name = NULL;
+    const char* socket_path = NULL;
+    int open_flags;
+    int init = false;
+
+    struct option long_options[] = {{"size", required_argument, 0, 0},
+                                    {"key", required_argument, 0, 0},
+                                    {"sock", required_argument, 0, 0},
+                                    {"dev", required_argument, 0, 'd'},
+                                    {"init", no_argument, &init, true},
+                                    {"verbose", no_argument, &verbose, true},
+                                    {0, 0, 0, 0}};
+
+    memset(&s.header, 0, sizeof(s.header));
+
+    while (1) {
+        int c;
+        int option_index = 0;
+        c = getopt_long(argc, argv, "d:", long_options, &option_index);
+        if (c == -1) {
+            break;
+        }
+
+        switch (c) {
+            /* long args */
+            case 0:
+                switch (option_index) {
+                    /* size */
+                    case 0:
+                        s.header.max_block = atoi(optarg) - 1;
+                        break;
+                    /* key */
+                    case 1:
+                        for (size_t i = 0; i < sizeof(s.header.key.byte); i++) {
+                            if (!optarg) {
+                                break;
+                            }
+                            s.header.key.byte[i] = strtol(optarg, &optarg, 16);
+                            s.header.key_programmed = 1;
+                        }
+                        break;
+                    /* sock */
+                    case 2:
+                        socket_path = optarg;
+                        break;
+                }
+                break;
+            /* dev */
+            case 'd':
+                data_file_name = optarg;
+                break;
+            default:
+                usage(argv[0]);
+                return EXIT_FAILURE;
+        }
+    }
+
+    /*
+     * We always need a data file, and at exactly one of --init or --sock
+     * must be specified.
+     */
+    if (!data_file_name || (!init == !socket_path)) {
+        usage(argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    /*
+     * If the file is already initialized, exit early.
+     */
+    if (init && !access(data_file_name, F_OK)) {
+        return EXIT_SUCCESS;
+    }
+
+    open_flags = O_RDWR;
+    if (init) {
+        open_flags |= O_CREAT | O_TRUNC;
+    }
+    s.data_fd = open(data_file_name, open_flags, S_IWUSR | S_IRUSR);
+    if (s.data_fd < 0) {
+        ALOGE("rpmb_dev: Failed to open rpmb data file, %s: %s\n", data_file_name, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    if (init) {
+        /* Create new rpmb data file */
+        if (s.header.max_block == 0) {
+            s.header.max_block = 512 - 1;
+        }
+        ret = write(s.data_fd, &s.header, sizeof(s.header));
+        if (ret != sizeof(s.header)) {
+            ALOGE("rpmb_dev: Failed to write rpmb data file: %d, %s\n", ret, strerror(errno));
+            return EXIT_FAILURE;
+        }
+        return EXIT_SUCCESS;
+    }
+
+    ret = read(s.data_fd, &s.header, sizeof(s.header));
+    if (ret != sizeof(s.header)) {
+        ALOGE("rpmb_dev: Failed to read rpmb data file: %d, %s\n", ret, strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    cmdres_sock = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (cmdres_sock < 0) {
+        ALOGE("rpmb_dev: Failed to create command/response socket: %s\n", strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    cmdres_sockaddr.sun_family = AF_UNIX;
+    strncpy(cmdres_sockaddr.sun_path, socket_path, sizeof(cmdres_sockaddr.sun_path));
+
+    ret = bind(cmdres_sock, (struct sockaddr*)&cmdres_sockaddr, sizeof(struct sockaddr_un));
+    if (ret < 0) {
+        ALOGE("rpmb_dev: Failed to bind command/response socket: %s: %s\n", socket_path,
+              strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    ret = listen(cmdres_sock, 1);
+    if (ret < 0) {
+        ALOGE("rpmb_dev: Failed to listen on command/response socket: %s\n", strerror(errno));
+        return EXIT_FAILURE;
+    }
+
+    while (true) {
+        int conn_sock = accept(cmdres_sock, NULL, NULL);
+        if (conn_sock < 0) {
+            ALOGE("rpmb_dev: Could not accept connection: %s\n", strerror(errno));
+            return EXIT_FAILURE;
+        }
+        ret = handle_conn(&s, conn_sock);
+        close(conn_sock);
+        if (ret) {
+            ALOGE("rpmb_dev: Connection terminated: %d", ret);
+        }
+    }
+}
diff --git a/trusty/utils/rpmb_dev/rpmb_dev.rc b/trusty/utils/rpmb_dev/rpmb_dev.rc
new file mode 100644
index 0000000..9f60e81
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_dev.rc
@@ -0,0 +1,29 @@
+# RPMB Mock
+on post-fs-data
+    mkdir /data/vendor/ss
+    chown root system /data/vendor/ss
+    chmod 0770 /data/vendor/ss
+    rm /data/vendor/ss/rpmb_sock
+    start rpmb_mock_init
+    start rpmb_mock
+
+    # Storage proxy
+    start storageproxyd
+
+service storageproxyd /vendor/bin/storageproxyd -d /dev/trusty-ipc-dev0 \
+        -r /data/vendor/ss/rpmb_sock -p /data/vendor/ss -t sock
+    class main
+    disabled
+    user root
+
+service rpmb_mock_init /vendor/bin/rpmb_dev --dev /data/vendor/ss/RPMB_DATA --init --key "ea df 64 44 ea 65 5d 1c 87 27 d4 20 71 0d 53 42 dd 73 a3 38 63 e1 d7 94 c3 72 a6 ea e0 64 64 e6" --size 2048
+    disabled
+    user system
+    group system
+    oneshot
+
+service rpmb_mock /vendor/bin/rpmb_dev --dev /data/vendor/ss/RPMB_DATA --sock /data/vendor/ss/rpmb_sock
+    class main
+    disabled
+    user system
+    group system
diff --git a/trusty/utils/rpmb_dev/rpmb_protocol.h b/trusty/utils/rpmb_dev/rpmb_protocol.h
new file mode 100644
index 0000000..bfcb806
--- /dev/null
+++ b/trusty/utils/rpmb_dev/rpmb_protocol.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include "rpmb.h" /* For struct rpmb_key */
+
+#define MMC_READ_MULTIPLE_BLOCK 18
+#define MMC_WRITE_MULTIPLE_BLOCK 25
+#define MMC_RELIABLE_WRITE_FLAG (1 << 31)
+
+#define MMC_RSP_PRESENT (1 << 0)
+#define MMC_RSP_CRC (1 << 2)
+#define MMC_RSP_OPCODE (1 << 4)
+#define MMC_CMD_ADTC (1 << 5)
+#define MMC_RSP_SPI_S1 (1 << 7)
+#define MMC_RSP_R1 (MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE)
+#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
+
+struct rpmb_nonce {
+    uint8_t byte[16];
+};
+
+struct rpmb_u16 {
+    uint8_t byte[2];
+};
+
+struct rpmb_u32 {
+    uint8_t byte[4];
+};
+
+#define RPMB_PACKET_DATA_SIZE (256)
+
+struct rpmb_packet {
+    uint8_t pad[196];
+    struct rpmb_key key_mac;
+    uint8_t data[RPMB_PACKET_DATA_SIZE];
+    struct rpmb_nonce nonce;
+    struct rpmb_u32 write_counter;
+    struct rpmb_u16 address;
+    struct rpmb_u16 block_count;
+    struct rpmb_u16 result;
+    struct rpmb_u16 req_resp;
+};
+
+enum rpmb_request {
+    RPMB_REQ_PROGRAM_KEY = 0x0001,
+    RPMB_REQ_GET_COUNTER = 0x0002,
+    RPMB_REQ_DATA_WRITE = 0x0003,
+    RPMB_REQ_DATA_READ = 0x0004,
+    RPMB_REQ_RESULT_READ = 0x0005,
+};
+
+enum rpmb_response {
+    RPMB_RESP_PROGRAM_KEY = 0x0100,
+    RPMB_RESP_GET_COUNTER = 0x0200,
+    RPMB_RESP_DATA_WRITE = 0x0300,
+    RPMB_RESP_DATA_READ = 0x0400,
+};
+
+enum rpmb_result {
+    RPMB_RES_OK = 0x0000,
+    RPMB_RES_GENERAL_FAILURE = 0x0001,
+    RPMB_RES_AUTH_FAILURE = 0x0002,
+    RPMB_RES_COUNT_FAILURE = 0x0003,
+    RPMB_RES_ADDR_FAILURE = 0x0004,
+    RPMB_RES_WRITE_FAILURE = 0x0005,
+    RPMB_RES_READ_FAILURE = 0x0006,
+    RPMB_RES_NO_AUTH_KEY = 0x0007,
+
+    RPMB_RES_WRITE_COUNTER_EXPIRED = 0x0080,
+};
+
+static inline struct rpmb_u16 rpmb_u16(uint16_t val) {
+    struct rpmb_u16 ret = {{
+            (uint8_t)(val >> 8),
+            (uint8_t)(val >> 0),
+    }};
+    return ret;
+}
+
+static inline struct rpmb_u32 rpmb_u32(uint32_t val) {
+    struct rpmb_u32 ret = {{
+            (uint8_t)(val >> 24),
+            (uint8_t)(val >> 16),
+            (uint8_t)(val >> 8),
+            (uint8_t)(val >> 0),
+    }};
+    return ret;
+}
+
+static inline uint16_t rpmb_get_u16(struct rpmb_u16 u16) {
+    size_t i;
+    uint16_t val;
+
+    val = 0;
+    for (i = 0; i < sizeof(u16.byte); i++)
+        val = val << 8 | u16.byte[i];
+
+    return val;
+}
+
+static inline uint32_t rpmb_get_u32(struct rpmb_u32 u32) {
+    size_t i;
+    uint32_t val;
+
+    val = 0;
+    for (i = 0; i < sizeof(u32.byte); i++)
+        val = val << 8 | u32.byte[i];
+
+    return val;
+}
diff --git a/trusty/utils/trusty-ut-ctrl/Android.bp b/trusty/utils/trusty-ut-ctrl/Android.bp
index 77d1f70..9c8af7b 100644
--- a/trusty/utils/trusty-ut-ctrl/Android.bp
+++ b/trusty/utils/trusty-ut-ctrl/Android.bp
@@ -20,6 +20,8 @@
     shared_libs: [
         "libc",
         "liblog",
+    ],
+    static_libs: [
         "libtrusty",
     ],
     gtest: false,