audio_thread_hang_monitor.cc | Explore in Territory

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/audio/audio_thread_hang_monitor.h"

#include <algorithm>
#include <utility>

#include "base/debug/dump_without_crashing.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/power_monitor/power_monitor.h"
#include "base/process/process.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/threading/thread_checker.h"
#include "base/time/tick_clock.h"

namespace media {

namespace {

// Maximum number of failed pings to the audio thread allowed. A UMA will be
// recorded once this count is reached. We require at least three failed pings
// before recording to ensure unobservable power events aren't mistakenly
// caught (e.g., the system suspends before a OnSuspend() event can be fired).
constexpr int kMaxFailedPingsCount = …;

// The default deadline after which we consider the audio thread hung.
constexpr base::TimeDelta kDefaultHangDeadline = …;

}  // namespace

AudioThreadHangMonitor::SharedAtomicFlag::SharedAtomicFlag() { … }
AudioThreadHangMonitor::SharedAtomicFlag::~SharedAtomicFlag() { … }

// static
AudioThreadHangMonitor::Ptr AudioThreadHangMonitor::Create(
    HangAction hang_action,
    std::optional<base::TimeDelta> hang_deadline,
    const base::TickClock* clock,
    scoped_refptr<base::SingleThreadTaskRunner> audio_thread_task_runner,
    scoped_refptr<base::SequencedTaskRunner> monitor_task_runner) { … }

AudioThreadHangMonitor::~AudioThreadHangMonitor() { … }

bool AudioThreadHangMonitor::IsAudioThreadHung() const { … }

AudioThreadHangMonitor::AudioThreadHangMonitor(
    HangAction hang_action,
    std::optional<base::TimeDelta> hang_deadline,
    const base::TickClock* clock,
    scoped_refptr<base::SingleThreadTaskRunner> audio_thread_task_runner)
    : … { … }

void AudioThreadHangMonitor::StartTimer() { … }

bool AudioThreadHangMonitor::NeverLoggedThreadHung() const { … }

bool AudioThreadHangMonitor::NeverLoggedThreadRecoveredAfterHung() const { … }

void AudioThreadHangMonitor::CheckIfAudioThreadIsAlive() { … }

void AudioThreadHangMonitor::LogHistogramThreadStatus() { … }

void AudioThreadHangMonitor::SetHangActionCallbacksForTesting(
    base::RepeatingClosure dump_callback,
    base::RepeatingClosure terminate_process_callback) { … }

void AudioThreadHangMonitor::DumpWithoutCrashing() { … }

void AudioThreadHangMonitor::TerminateCurrentProcess() { … }

}  // namespace media
chromium/media/audio/audio_thread_hang_monitor.cc
