| // Copyright 2018 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 <cstdio> |
| #include <cstring> |
| #include <thread> |
| |
| #include <lib/fxl/command_line.h> |
| #include <lib/fxl/log_settings.h> |
| #include <lib/fxl/log_settings_command_line.h> |
| #include <lib/zx/channel.h> |
| #include <lib/zx/event.h> |
| #include <lib/zx/port.h> |
| #include <zircon/process.h> |
| #include <zircon/processargs.h> |
| #include <zircon/syscalls.h> |
| #include <zircon/syscalls/port.h> |
| |
| #include "garnet/lib/debugger_utils/breakpoints.h" |
| #include "garnet/lib/debugger_utils/util.h" |
| |
| using debugger_utils::ZxErrorString; |
| |
| static void ExceptionHandlerThreadFunc( |
| zx_handle_t thread, zx::port* eport, zx::event* event) { |
| zx_koid_t tid = debugger_utils::GetKoid(thread); |
| zx_status_t status = zx_task_bind_exception_port( |
| thread, eport->get(), tid, 0); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| // Now that we've bound to the thread, notify the test. |
| status = event->signal(0, ZX_EVENT_SIGNALED); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| for (;;) { |
| zx_port_packet_t packet; |
| zx_status_t status = eport->wait(zx::time::infinite(), &packet); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| if (packet.type == ZX_PKT_TYPE_USER) { |
| // Sent to trigger loop exit. |
| break; |
| } |
| |
| FXL_CHECK(ZX_PKT_IS_EXCEPTION(packet.type)); |
| FXL_CHECK(packet.type == ZX_EXCP_SW_BREAKPOINT); |
| FXL_CHECK(packet.key == tid); |
| status = debugger_utils::ResumeAfterSoftwareBreakpointInstruction( |
| thread, eport->get()); |
| FXL_CHECK(status == ZX_OK); |
| } |
| } |
| |
| static void SendSelfThread(const zx::channel& channel) { |
| // Send the parent a packet so that it knows we've started. |
| zx_handle_t self_copy; |
| zx_status_t status = zx_handle_duplicate( |
| zx_thread_self(), ZX_RIGHT_SAME_RIGHTS, &self_copy); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| status = channel.write(0, nullptr, 0, &self_copy, 1); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| } |
| |
| static void WaitPeerClosed(const zx::channel& channel) { |
| zx_status_t status = channel.wait_one(ZX_CHANNEL_PEER_CLOSED, |
| zx::time::infinite(), nullptr); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| } |
| |
| static int PerformWaitPeerClosed(const zx::channel& channel) { |
| SendSelfThread(channel); |
| WaitPeerClosed(channel); |
| printf("wait-peer-closed complete\n"); |
| return 0; |
| } |
| |
| static int TriggerSoftwareBreakpoint(const zx::channel& channel, |
| bool with_handler) { |
| zx::port eport; |
| zx_status_t status = zx::port::create(0, &eport); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| if (with_handler) { |
| zx::event event; |
| status = zx::event::create(0, &event); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| zx_handle_t self_thread = zx_thread_self(); |
| std::thread exception_thread( |
| &ExceptionHandlerThreadFunc, self_thread, &eport, &event); |
| |
| // Don't trigger the s/w breakpoint until the exception loop is ready |
| // to handle it. |
| status = event.wait_one(ZX_EVENT_SIGNALED, zx::time::infinite(), nullptr); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| |
| debugger_utils::TriggerSoftwareBreakpoint(); |
| |
| WaitPeerClosed(channel); |
| |
| // Tell the exception thread to exit. |
| zx_port_packet_t packet{}; |
| status = eport.queue(&packet); |
| FXL_CHECK(status == ZX_OK) << "status: " << ZxErrorString(status); |
| exception_thread.join(); |
| |
| printf("trigger-sw-bkpt-with-handler complete\n"); |
| } else { |
| debugger_utils::TriggerSoftwareBreakpoint(); |
| |
| WaitPeerClosed(channel); |
| |
| printf("trigger-sw-bkpt complete\n"); |
| } |
| |
| return 0; |
| } |
| |
| int main(int argc, char* argv[]) { |
| auto cl = fxl::CommandLineFromArgcArgv(argc, argv); |
| if (!fxl::SetLogSettingsFromCommandLine(cl)) { |
| return 1; |
| } |
| |
| const std::vector<std::string>& args = cl.positional_args(); |
| |
| if (!args.empty()) { |
| zx::channel channel{zx_take_startup_handle(PA_HND(PA_USER0, 0))}; |
| // If no channel was passed we're running standalone. |
| if (!channel.is_valid()) { |
| FXL_LOG(WARNING) << "No handle provided"; |
| } |
| |
| const std::string& cmd = args[0]; |
| if (cmd == "wait-peer-closed") { |
| return PerformWaitPeerClosed(channel); |
| } |
| if (cmd == "trigger-sw-bkpt") { |
| return TriggerSoftwareBreakpoint(channel, false); |
| } |
| if (cmd == "trigger-sw-bkpt-with-handler") { |
| return TriggerSoftwareBreakpoint(channel, true); |
| } |
| FXL_LOG(ERROR) << "Unrecognized command: " << cmd; |
| return 1; |
| } |
| |
| printf("Hello.\n"); |
| return 0; |
| } |