chromium/services/tracing/public/cpp/perfetto/custom_event_recorder.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/tracing/public/cpp/perfetto/custom_event_recorder.h"

#include "base/base64.h"
#include "base/functional/callback_helpers.h"
#include "base/metrics/histogram_samples.h"
#include "base/metrics/metrics_hashes.h"
#include "base/metrics/statistics_recorder.h"
#include "base/metrics/user_metrics.h"
#include "base/no_destructor.h"
#include "base/pickle.h"
#include "base/process/current_process.h"
#include "base/synchronization/lock.h"
#include "base/time/time.h"
#include "base/trace_event/trace_config.h"
#include "base/trace_event/typed_macros.h"
#include "base/tracing/protos/chrome_track_event.pbzero.h"
#include "build/build_config.h"
#include "services/tracing/public/cpp/perfetto/perfetto_traced_process.h"
#include "services/tracing/public/cpp/perfetto/trace_string_lookup.h"
#include "third_party/perfetto/include/perfetto/tracing/internal/track_event_internal.h"
#include "third_party/perfetto/include/perfetto/tracing/track_event_interned_data_index.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/chrome_active_processes.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/chrome_histogram_sample.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/chrome_process_descriptor.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/chrome_user_event.pbzero.h"

#if BUILDFLAG(IS_ANDROID)
#include "base/android/application_status_listener.h"
#include "base/trace_event/application_state_proto_android.h"
#endif

TraceConfig;
ChromeProcessDescriptor;

namespace tracing {
namespace {

constexpr char kHistogramSamplesCategory[] = …);
constexpr char kUserActionSamplesCategory[] = …);

base::SequencedTaskRunner* GetTaskRunner() { … }

struct InternedHistogramName
    : public perfetto::TrackEventInternedDataIndex<
          InternedHistogramName,
          perfetto::protos::pbzero::InternedData::kHistogramNamesFieldNumber,
          const char*> { … };

}  // namespace

CustomEventRecorder::CustomEventRecorder() { … }

CustomEventRecorder::~CustomEventRecorder()
{ … }

// static
CustomEventRecorder* CustomEventRecorder::GetInstance() { … }

// static
void CustomEventRecorder::EmitRecurringUpdates() { … }

void CustomEventRecorder::OnSetup(
    const perfetto::DataSourceBase::SetupArgs& args) { … }

void CustomEventRecorder::OnStop(
    const perfetto::DataSourceBase::StopArgs& args) { … }

void CustomEventRecorder::WillClearIncrementalState(
    const perfetto::DataSourceBase::ClearIncrementalStateArgs&) { … }

void CustomEventRecorder::OnStartupTracingStarted(
    const TraceConfig& trace_config,
    bool /*privacy_filtering_enabled*/) { … }

// TODO(khokhlov): In SDK build, this method can be called at startup, before
// the task runner is created. Factor out the parts that can be called early
// into OnStartupTracingStarted, and make sure each part is called at the
// appropriate time.
void CustomEventRecorder::OnTracingStarted(
    const perfetto::DataSourceConfig& data_source_config) { … }

void CustomEventRecorder::OnTracingStopped(
    base::OnceClosure stop_complete_callback) { … }

void CustomEventRecorder::OnUserActionSampleCallback(
    const std::string& action,
    base::TimeTicks action_time) { … }

void CustomEventRecorder::LogHistogram(base::HistogramBase* histogram) { … }

void CustomEventRecorder::ResetHistograms(const TraceConfig& trace_config) { … }

void CustomEventRecorder::LogHistograms() { … }

// static
void CustomEventRecorder::OnMetricsSampleCallback(
    const char* histogram_name,
    uint64_t name_hash,
    base::HistogramBase::Sample sample) { … }

}  // namespace tracing