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// Copyright 2015 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.
#ifndef COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_
#define COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/profiler/stack_sampling_profiler.h"
#include "components/metrics/call_stack_profile_params.h"
#include "components/metrics/metrics_provider.h"
namespace metrics {
class ChromeUserMetricsExtension;
// Performs metrics logging for the stack sampling profiler.
class CallStackProfileMetricsProvider : public MetricsProvider {
public:
// These milestones of a process lifetime can be passed as process "mile-
// stones" to StackSmaplingProfile::SetProcessMilestone(). Be sure to update
// the translation constants at the top of the .cc file when this is changed.
enum Milestones : int {
MAIN_LOOP_START,
MAIN_NAVIGATION_START,
MAIN_NAVIGATION_FINISHED,
FIRST_NONEMPTY_PAINT,
SHUTDOWN_START,
MILESTONES_MAX_VALUE
};
CallStackProfileMetricsProvider();
~CallStackProfileMetricsProvider() override;
// Get a callback for use with StackSamplingProfiler that provides completed
// profiles to this object. The callback should be immediately passed to the
// StackSamplingProfiler, and should not be reused between
// StackSamplingProfilers. This function may be called on any thread.
static base::StackSamplingProfiler::CompletedCallback GetProfilerCallback(
const CallStackProfileParams& params);
// Provides completed stack profiles to the metrics provider. Intended for use
// when receiving profiles over IPC. In-process StackSamplingProfiler users
// should use GetProfilerCallback() instead. |profiles| is not const& because
// it must be passed with std::move.
static void ReceiveCompletedProfiles(
const CallStackProfileParams& params,
base::TimeTicks start_timestamp,
base::StackSamplingProfiler::CallStackProfiles profiles);
// MetricsProvider:
void OnRecordingEnabled() override;
void OnRecordingDisabled() override;
void ProvideGeneralMetrics(ChromeUserMetricsExtension* uma_proto) override;
protected:
// Finch field trial and group for reporting profiles. Provided here for test
// use.
static const char kFieldTrialName[];
static const char kReportProfilesGroupName[];
// Reset the static state to the defaults after startup.
static void ResetStaticStateForTesting();
private:
// Returns true if reporting of profiles is enabled according to the
// controlling Finch field trial.
static bool IsReportingEnabledByFieldTrial();
DISALLOW_COPY_AND_ASSIGN(CallStackProfileMetricsProvider);
};
} // namespace metrics
#endif // COMPONENTS_METRICS_CALL_STACK_PROFILE_METRICS_PROVIDER_H_
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