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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_TRACING_COMMON_ETW_SYSTEM_DATA_SOURCE_WIN_H_
#define COMPONENTS_TRACING_COMMON_ETW_SYSTEM_DATA_SOURCE_WIN_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "base/process/process_handle.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "base/thread_annotations.h"
#include "base/win/event_trace_controller.h"
#include "components/tracing/tracing_export.h"
#include "third_party/perfetto/include/perfetto/tracing/data_source.h"
namespace perfetto {
class TraceWriterBase;
}
namespace tracing {
class EtwConsumer;
class TRACING_EXPORT EtwSystemDataSource
: public perfetto::DataSource<EtwSystemDataSource> {
public:
static constexpr bool kSupportsMultipleInstances = false;
// Registers the data source. `client_pid` identifies the client process on
// behalf of which traces are collected. If specified, events are filtered to
// exclude certain details from non-Chrome processes. No filtering is
// performed when a client pid is not provided.
static void Register(base::ProcessId client_pid = base::kNullProcessId);
explicit EtwSystemDataSource(base::ProcessId client_pid);
EtwSystemDataSource(const EtwSystemDataSource&) = delete;
EtwSystemDataSource& operator=(const EtwSystemDataSource&) = delete;
~EtwSystemDataSource() override;
// perfetto::DataSource:
void OnSetup(const SetupArgs&) override;
void OnStart(const StartArgs&) override;
void OnStop(const StopArgs&) override;
private:
std::unique_ptr<perfetto::TraceWriterBase> CreateTraceWriter();
// Identifier of the process on behalf of which traces are collected.
const base::ProcessId client_pid_;
base::win::EtwTraceController etw_controller_
GUARDED_BY_CONTEXT(sequence_checker_);
scoped_refptr<base::SequencedTaskRunner> consume_task_runner_
GUARDED_BY_CONTEXT(sequence_checker_);
std::unique_ptr<EtwConsumer, base::OnTaskRunnerDeleter> consumer_
GUARDED_BY_CONTEXT(sequence_checker_);
perfetto::DataSourceConfig data_source_config_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace tracing
#endif // COMPONENTS_TRACING_COMMON_ETW_SYSTEM_DATA_SOURCE_WIN_H_
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