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// Copyright 2020 the V8 project 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 V8_PROFILER_PROFILER_STATS_H_
#define V8_PROFILER_PROFILER_STATS_H_
#include <atomic>
namespace v8 {
namespace internal {
// Stats are used to diagnose the reasons for dropped or unnattributed frames.
class ProfilerStats {
public:
enum Reason {
// Reasons we fail to record a TickSample.
kTickBufferFull,
kIsolateNotLocked,
// These all generate a TickSample.
kSimulatorFillRegistersFailed,
kNoFrameRegion,
kInCallOrApply,
kNoSymbolizedFrames,
kNullPC,
kNumberOfReasons,
};
static ProfilerStats* Instance() {
static ProfilerStats stats;
return &stats;
}
void AddReason(Reason reason);
void Clear();
void Print() const;
private:
ProfilerStats() = default;
static const char* ReasonToString(Reason reason);
std::atomic_int counts_[Reason::kNumberOfReasons] = {};
};
} // namespace internal
} // namespace v8
#endif // V8_PROFILER_PROFILER_STATS_H_
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