// 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_