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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_RULE_H_
#define CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_RULE_H_
#include <memory>
#include <optional>
#include "base/observer_list_types.h"
#include "base/timer/timer.h"
#include "content/common/content_export.h"
#include "third_party/perfetto/protos/perfetto/config/chrome/scenario_config.gen.h"
#include "third_party/perfetto/protos/perfetto/trace/chrome/chrome_metadata.pbzero.h"
namespace content {
class CONTENT_EXPORT BackgroundTracingRule : public base::CheckedObserver {
public:
using MetadataProto =
perfetto::protos::pbzero::BackgroundTracingMetadata::TriggerRule;
// Returns true if the trigger caused a scenario to either begin recording or
// finalize the trace depending on the config.
using RuleTriggeredCallback =
base::RepeatingCallback<bool(const BackgroundTracingRule*)>;
BackgroundTracingRule();
BackgroundTracingRule(const BackgroundTracingRule&) = delete;
BackgroundTracingRule& operator=(const BackgroundTracingRule&) = delete;
~BackgroundTracingRule() override;
virtual void Install(RuleTriggeredCallback);
virtual void Uninstall();
virtual perfetto::protos::gen::TriggerRule ToProtoForTesting() const;
virtual void GenerateMetadataProto(MetadataProto* out) const;
// Probability that we should allow a tigger to happen.
double trigger_chance() const { return trigger_chance_; }
std::optional<base::TimeDelta> delay() const { return delay_; }
static std::unique_ptr<BackgroundTracingRule> Create(
const perfetto::protos::gen::TriggerRule& config);
static bool Append(
const std::vector<perfetto::protos::gen::TriggerRule>& configs,
std::vector<std::unique_ptr<BackgroundTracingRule>>& rules);
const std::string& rule_name() const { return rule_name_; }
std::optional<int32_t> triggered_value() const { return triggered_value_; }
uint64_t flow_id() const { return flow_id_; }
bool is_crash() const { return is_crash_; }
bool OnRuleTriggered(std::optional<int32_t> value, uint64_t flow_id);
protected:
virtual std::string GetDefaultRuleName() const;
virtual void DoInstall() = 0;
virtual void DoUninstall() = 0;
bool installed() const { return installed_; }
private:
void Setup(const perfetto::protos::gen::TriggerRule& config);
RuleTriggeredCallback trigger_callback_;
bool installed_ = false;
double trigger_chance_ = 1.0;
std::optional<base::TimeDelta> delay_;
std::optional<base::TimeDelta> activation_delay_;
base::OneShotTimer trigger_timer_;
base::OneShotTimer activation_timer_;
std::string rule_name_;
std::optional<int32_t> triggered_value_;
uint64_t flow_id_;
bool is_crash_ = false;
};
} // namespace content
#endif // CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_RULE_H_
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