| // Copyright 2017 The Chromium 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 "services/tracing/public/cpp/trace_event_agent.h" |
| |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/bind.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/ref_counted_memory.h" |
| #include "base/no_destructor.h" |
| #include "base/strings/string_util.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/time/time.h" |
| #include "base/trace_event/trace_log.h" |
| #include "base/values.h" |
| #include "build/build_config.h" |
| #include "services/service_manager/public/cpp/connector.h" |
| #include "services/tracing/public/cpp/tracing_features.h" |
| #include "services/tracing/public/mojom/constants.mojom.h" |
| |
| #if defined(OS_ANDROID) || defined(OS_LINUX) || defined(OS_MACOSX) || \ |
| defined(OS_WIN) |
| #define PERFETTO_AVAILABLE |
| #include "services/tracing/public/cpp/perfetto/producer_client.h" |
| #include "services/tracing/public/cpp/perfetto/trace_event_data_source.h" |
| #include "third_party/perfetto/include/perfetto/tracing/core/trace_writer.h" |
| #include "third_party/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pbzero.h" |
| #include "third_party/perfetto/protos/perfetto/trace/trace_packet.pbzero.h" |
| #endif |
| |
| namespace { |
| |
| const char kTraceEventLabel[] = "traceEvents"; |
| |
| tracing::TraceEventAgent* g_trace_event_agent; |
| |
| } // namespace |
| |
| namespace tracing { |
| |
| #if defined(PERFETTO_AVAILABLE) |
| |
| namespace { |
| |
| ProducerClient* GetProducerClient() { |
| static base::NoDestructor<ProducerClient> producer_client; |
| return producer_client.get(); |
| } |
| |
| void InitializeProducerClient(service_manager::Connector* connector) { |
| mojom::PerfettoServicePtr perfetto_service; |
| connector->BindInterface(mojom::kServiceName, &perfetto_service); |
| |
| GetProducerClient()->CreateMojoMessagepipes(base::BindOnce( |
| [](mojom::PerfettoServicePtr perfetto_service, |
| mojom::ProducerClientPtr producer_client_pipe, |
| mojom::ProducerHostRequest producer_host_pipe) { |
| perfetto_service->ConnectToProducerHost(std::move(producer_client_pipe), |
| std::move(producer_host_pipe)); |
| }, |
| std::move(perfetto_service))); |
| |
| GetProducerClient()->AddDataSource(TraceEventDataSource::GetInstance()); |
| } |
| |
| void AddPerfettoMetadataGeneratorFunction( |
| TraceEventAgent::MetadataGeneratorFunction generator) { |
| // Instantiate and register the metadata data source on the first |
| // call. |
| static TraceEventMetadataSource* metadata_source = []() { |
| static base::NoDestructor<TraceEventMetadataSource> instance; |
| GetProducerClient()->AddDataSource(instance.get()); |
| return instance.get(); |
| }(); |
| |
| metadata_source->AddGeneratorFunction(generator); |
| } |
| |
| } // namespace |
| |
| #endif |
| |
| // static |
| std::unique_ptr<TraceEventAgent> TraceEventAgent::Create( |
| service_manager::Connector* connector, |
| bool request_clock_sync_marker_on_android) { |
| |
| #if defined(PERFETTO_AVAILABLE) |
| InitializeProducerClient(connector); |
| #endif |
| |
| return std::make_unique<TraceEventAgent>( |
| connector, request_clock_sync_marker_on_android); |
| } |
| |
| TraceEventAgent::TraceEventAgent(service_manager::Connector* connector, |
| bool request_clock_sync_marker_on_android) |
| : BaseAgent(connector, |
| kTraceEventLabel, |
| mojom::TraceDataType::ARRAY, |
| #if defined(OS_ANDROID) |
| request_clock_sync_marker_on_android, |
| #else |
| false, |
| #endif |
| base::trace_event::TraceLog::GetInstance()->process_id()), |
| enabled_tracing_modes_(0) { |
| DCHECK_CALLED_ON_VALID_THREAD(thread_checker_); |
| DCHECK(!g_trace_event_agent); |
| g_trace_event_agent = this; |
| } |
| |
| TraceEventAgent::~TraceEventAgent() { |
| g_trace_event_agent = nullptr; |
| DCHECK(!trace_log_needs_me_); |
| } |
| |
| void TraceEventAgent::RequestClockSyncMarker( |
| const std::string& sync_id, |
| Agent::RequestClockSyncMarkerCallback callback) { |
| #if defined(OS_ANDROID) |
| base::trace_event::TraceLog::GetInstance()->AddClockSyncMetadataEvent(); |
| std::move(callback).Run(base::TimeTicks(), base::TimeTicks()); |
| #else |
| NOTREACHED(); |
| #endif |
| } |
| |
| void TraceEventAgent::GetCategories(GetCategoriesCallback callback) { |
| std::vector<std::string> category_vector; |
| base::trace_event::TraceLog::GetInstance()->GetKnownCategoryGroups( |
| &category_vector); |
| std::move(callback).Run(base::JoinString(category_vector, ",")); |
| } |
| |
| void TraceEventAgent::AddMetadataGeneratorFunction( |
| MetadataGeneratorFunction generator) { |
| DCHECK_CALLED_ON_VALID_THREAD(thread_checker_); |
| metadata_generator_functions_.push_back(generator); |
| #if defined(PERFETTO_AVAILABLE) |
| AddPerfettoMetadataGeneratorFunction(generator); |
| #endif |
| } |
| |
| void TraceEventAgent::StartTracing(const std::string& config, |
| base::TimeTicks coordinator_time, |
| StartTracingCallback callback) { |
| DCHECK(!recorder_); |
| #if defined(__native_client__) |
| // NaCl and system times are offset by a bit, so subtract some time from |
| // the captured timestamps. The value might be off by a bit due to messaging |
| // latency. |
| base::TimeDelta time_offset = TRACE_TIME_TICKS_NOW() - coordinator_time; |
| TraceLog::GetInstance()->SetTimeOffset(time_offset); |
| #endif |
| enabled_tracing_modes_ = base::trace_event::TraceLog::RECORDING_MODE; |
| const base::trace_event::TraceConfig trace_config(config); |
| if (!trace_config.event_filters().empty()) |
| enabled_tracing_modes_ |= base::trace_event::TraceLog::FILTERING_MODE; |
| base::trace_event::TraceLog::GetInstance()->SetEnabled( |
| trace_config, enabled_tracing_modes_); |
| std::move(callback).Run(true); |
| } |
| |
| void TraceEventAgent::StopAndFlush(mojom::RecorderPtr recorder) { |
| DCHECK(!recorder_); |
| recorder_ = std::move(recorder); |
| base::trace_event::TraceLog::GetInstance()->SetDisabled( |
| enabled_tracing_modes_); |
| enabled_tracing_modes_ = 0; |
| for (const auto& generator : metadata_generator_functions_) { |
| auto metadata = generator.Run(); |
| if (metadata) |
| recorder_->AddMetadata(std::move(*metadata)); |
| } |
| trace_log_needs_me_ = true; |
| base::trace_event::TraceLog::GetInstance()->Flush( |
| base::Bind(&TraceEventAgent::OnTraceLogFlush, base::Unretained(this))); |
| } |
| |
| void TraceEventAgent::RequestBufferStatus( |
| RequestBufferStatusCallback callback) { |
| base::trace_event::TraceLogStatus status = |
| base::trace_event::TraceLog::GetInstance()->GetStatus(); |
| std::move(callback).Run(status.event_capacity, status.event_count); |
| } |
| |
| void TraceEventAgent::OnTraceLogFlush( |
| const scoped_refptr<base::RefCountedString>& events_str, |
| bool has_more_events) { |
| if (!events_str->data().empty()) |
| recorder_->AddChunk(events_str->data()); |
| if (!has_more_events) { |
| trace_log_needs_me_ = false; |
| recorder_.reset(); |
| } |
| } |
| |
| } // namespace tracing |