chromium/third_party/perfetto/src/tracing/tracing.cc

/*
 * 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 "perfetto/tracing/tracing.h"

#include <atomic>
#include <condition_variable>
#include <mutex>

#include "perfetto/base/time.h"
#include "perfetto/ext/base/no_destructor.h"
#include "perfetto/ext/base/waitable_event.h"
#include "perfetto/tracing/internal/track_event_internal.h"
#include "src/tracing/internal/tracing_muxer_impl.h"

namespace perfetto {
namespace {
bool g_was_initialized = …;

// Wrapped in a function to avoid global constructor
std::mutex& InitializedMutex() { … }
}  // namespace

// static
void Tracing::InitializeInternal(const TracingInitArgs& args) { … }

// static
bool Tracing::IsInitialized() { … }

// static
void Tracing::Shutdown() { … }

// static
void Tracing::ResetForTesting() { … }

//  static
std::unique_ptr<TracingSession> Tracing::NewTraceInternal(
    BackendType backend,
    TracingConsumerBackend* (*system_backend_factory)()) { … }

//  static
std::unique_ptr<StartupTracingSession> Tracing::SetupStartupTracing(
    const TraceConfig& config,
    Tracing::SetupStartupTracingOpts opts) { … }

//  static
std::unique_ptr<StartupTracingSession> Tracing::SetupStartupTracingBlocking(
    const TraceConfig& config,
    Tracing::SetupStartupTracingOpts opts) { … }

//  static
void Tracing::ActivateTriggers(const std::vector<std::string>& triggers,
                               uint32_t ttl_ms) { … }

TracingSession::~TracingSession() = default;

// Can be called from any thread.
bool TracingSession::FlushBlocking(uint32_t timeout_ms) { … }

std::vector<char> TracingSession::ReadTraceBlocking() { … }

TracingSession::GetTraceStatsCallbackArgs
TracingSession::GetTraceStatsBlocking() { … }

TracingSession::QueryServiceStateCallbackArgs
TracingSession::QueryServiceStateBlocking() { … }

StartupTracingSession::~StartupTracingSession() = default;

}  // namespace perfetto