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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_TEST_LAUNCHER_TEST_LAUNCHER_TRACER_H_
#define BASE_TEST_LAUNCHER_TEST_LAUNCHER_TRACER_H_
#include <string>
#include <vector>
#include "base/synchronization/lock.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
namespace base {
class FilePath;
// Records traces of test execution, e.g. to analyze performance.
// Thread safe.
class TestLauncherTracer {
public:
TestLauncherTracer();
TestLauncherTracer(const TestLauncherTracer&) = delete;
TestLauncherTracer& operator=(const TestLauncherTracer&) = delete;
~TestLauncherTracer();
// Records an event corresponding to test process execution.
// Return the sequence num of the process executed. The sequence num is also
// used as part of the event name been recorded.
int RecordProcessExecution(TimeTicks start_time, TimeDelta duration);
// Dumps trace data as JSON. Returns true on success.
[[nodiscard]] bool Dump(const FilePath& path);
private:
// Simplified version of base::TraceEvent.
struct Event {
std::string name; // Displayed name.
TimeTicks timestamp; // Timestamp when this event began.
TimeDelta duration; // How long was this event.
PlatformThreadId thread_id; // Thread ID where event was reported.
};
// Timestamp when tracing started.
TimeTicks trace_start_time_;
// Log of trace events.
std::vector<Event> events_;
// Lock to protect all member variables.
Lock lock_;
};
} // namespace base
#endif // BASE_TEST_LAUNCHER_TEST_LAUNCHER_TRACER_H_
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