| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <dlfcn.h> |
| #include <lib/fake-object/object.h> |
| #include <zircon/compiler.h> |
| #include <zircon/syscalls.h> |
| |
| #include <fbl/ref_ptr.h> |
| |
| __EXPORT |
| HandleTable& FakeHandleTable() { |
| static HandleTable gHandleTable; |
| return gHandleTable; |
| } |
| |
| __EXPORT void* FindRealSyscall(const char* name) { |
| static void* vdso = dlopen("libzircon.so", RTLD_NOLOAD); |
| return dlsym(vdso, name); |
| } |
| |
| // Closes a fake handle. Real handles are passed through to |zx_handle_close|. |
| // In the event of ZX_HANDLE_INVALID, that is technically a valid fake handle due |
| // to fake handles all being even values. |
| __EXPORT |
| zx_status_t zx_handle_close(zx_handle_t handle) { |
| if (HandleTable::IsValidFakeHandle(handle)) { |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ftracef("handle = %#x, obj = %p, status = %d\n", handle, obj.get(), status); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return FakeHandleTable().Remove(handle); |
| } |
| return REAL_SYSCALL(zx_handle_close)(handle); |
| } |
| |
| // Calls our |zx_handle_close| on each handle, ensuring that both real and fake handles are |
| // closed properly when grouped. |
| __EXPORT |
| zx_status_t zx_handle_close_many(const zx_handle_t* handles, size_t num_handles) { |
| for (size_t i = 0; i < num_handles; i++) { |
| zx_handle_close(handles[i]); |
| } |
| |
| return ZX_OK; |
| } |
| |
| // Duplicates a fake handle, or if it is a real handle, calls the real |
| // zx_handle_duplicate function. |
| // |rights| is ignored for fake handles. |
| __EXPORT |
| zx_status_t zx_handle_duplicate(zx_handle_t handle, zx_rights_t rights, zx_handle_t* out) { |
| if (HandleTable::IsValidFakeHandle(handle)) { |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ftracef("handle = %#x, obj = %p, status = %d\n", handle, obj.get(), status); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return FakeHandleTable().Add(std::move(obj), out); |
| } |
| return REAL_SYSCALL(zx_handle_duplicate)(handle, rights, out); |
| } |
| |
| // Adds an object to the table a second time before removing the first handle. |
| __EXPORT |
| zx_status_t zx_handle_replace(zx_handle_t handle, zx_rights_t rights, zx_handle_t* out) { |
| if (HandleTable::IsValidFakeHandle(handle)) { |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ftracef("handle = %#x, obj = %p, status = %d\n", handle, obj.get(), status); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| ZX_ASSERT(FakeHandleTable().Add(std::move(obj), out) == ZX_OK); |
| ZX_ASSERT(FakeHandleTable().Remove(handle) == ZX_OK); |
| return ZX_OK; |
| } |
| |
| return REAL_SYSCALL(zx_handle_replace)(handle, rights, out); |
| } |
| |
| // All object syscalls below will pass valid objects to the real syscalls and fake |
| // syscalls to the appropriate method on the fake object implemented for that type. |
| __EXPORT |
| zx_status_t zx_object_get_child(zx_handle_t handle, uint64_t koid, zx_rights_t rights, |
| zx_handle_t* out) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_get_child)(handle, koid, rights, out); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->get_child(handle, koid, rights, out); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_get_info(zx_handle_t handle, uint32_t topic, void* buffer, size_t buffer_size, |
| size_t* actual_count, size_t* avail_count) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_get_info)(handle, topic, buffer, buffer_size, actual_count, |
| avail_count); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->get_info(handle, topic, buffer, buffer_size, actual_count, avail_count); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_get_property(zx_handle_t handle, uint32_t property, void* value, |
| size_t value_size) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_get_property)(handle, property, value, value_size); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->get_property(handle, property, value, value_size); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_set_profile(zx_handle_t handle, zx_handle_t profile, uint32_t options) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_set_profile)(handle, profile, options); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->set_profile(handle, profile, options); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_set_property(zx_handle_t handle, uint32_t property, const void* value, |
| size_t value_size) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_set_property)(handle, property, value, value_size); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->set_property(handle, property, value, value_size); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_signal(zx_handle_t handle, uint32_t clear_mask, uint32_t set_mask) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_signal)(handle, clear_mask, set_mask); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->signal(handle, clear_mask, set_mask); |
| } |
| |
| __EXPORT |
| zx_status_t signal_peer(zx_handle_t handle, uint32_t clear_mask, uint32_t set_mask) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_signal_peer)(handle, clear_mask, set_mask); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->signal_peer(handle, clear_mask, set_mask); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_wait_one(zx_handle_t handle, zx_signals_t signals, zx_time_t deadline, |
| zx_signals_t* observed) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_wait_one)(handle, signals, deadline, observed); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->wait_one(handle, signals, deadline, observed); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_wait_async(zx_handle_t handle, zx_handle_t port, uint64_t key, |
| zx_signals_t signals, uint32_t options) { |
| if (!HandleTable::IsValidFakeHandle(handle)) { |
| return REAL_SYSCALL(zx_object_wait_async)(handle, port, key, signals, options); |
| } |
| |
| fbl::RefPtr<Object> obj; |
| zx_status_t status = FakeHandleTable().Get(handle, &obj); |
| ZX_ASSERT_MSG(status == ZX_OK, "fake_%s: Bad handle = %#x, status = %d\n", __func__, handle, |
| status); |
| return obj->wait_async(handle, port, key, signals, options); |
| } |
| |
| __EXPORT |
| zx_status_t zx_object_wait_many(zx_wait_item_t* items, size_t count, zx_time_t deadline) { |
| for (size_t i = 0; i < count; i++) { |
| ZX_ASSERT_MSG(!HandleTable::IsValidFakeHandle(items[i].handle), |
| "Fake handle %u was passed as index %zu to zx_object_wait_many!\n", |
| items[i].handle, i); |
| } |
| |
| // No fake handles were passed in so it's safe to call the real syscall. |
| return REAL_SYSCALL(zx_object_wait_many)(items, count, deadline); |
| } |
| |
| __EXPORT |
| zx_status_t fake_object_create(zx_handle_t* out) { |
| fbl::RefPtr<Object> obj = fbl::MakeRefCounted<Object>(); |
| return FakeHandleTable().Add(std::move(obj), out); |
| } |
| |
| __EXPORT |
| zx_koid_t fake_object_get_koid(zx_handle_t handle) { |
| fbl::RefPtr<Object> obj; |
| ZX_ASSERT(FakeHandleTable().Get(handle, &obj) == ZX_OK); |
| return obj->get_koid(); |
| } |