| // Copyright 2022 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. |
| |
| #ifndef SRC_VIRTUALIZATION_TESTS_BACKTRACE_WATCHDOG_H_ |
| #define SRC_VIRTUALIZATION_TESTS_BACKTRACE_WATCHDOG_H_ |
| |
| #include <lib/zx/event.h> |
| #include <lib/zx/job.h> |
| #include <lib/zx/time.h> |
| |
| #include <thread> |
| |
| // BacktraceWatchdog is a one-shot watchdog that backtraces all the threads in a job if the timeout |
| // is reached prior to the watchdog being stopped. The watchdog spawns its own thread and does not |
| // rely on a thread being available on any dispatcher to trigger the timeout. |
| class BacktraceWatchdog { |
| public: |
| BacktraceWatchdog() = default; |
| ~BacktraceWatchdog(); |
| |
| // Start the watchdog with the given job and timeout. |
| zx_status_t Start(zx::job job, zx::duration wait_time); |
| |
| // Stop the watchdog early. This happens implicitly on destruction. |
| void Stop(); |
| |
| private: |
| int WatchdogThread(); |
| void Backtrace(); |
| |
| bool running_ = false; |
| zx::time timeout_; |
| std::thread thread_; |
| zx::job job_; |
| zx::event event_; |
| }; |
| |
| #endif // SRC_VIRTUALIZATION_TESTS_BACKTRACE_WATCHDOG_H_ |