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// Copyright 2019 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_CODEGEN_TICK_COUNTER_H_
#define V8_CODEGEN_TICK_COUNTER_H_
#include <cstddef>
namespace v8 {
namespace internal {
class LocalHeap;
// This method generates a tick. Also makes the current thread to enter a
// safepoint iff it was required to do so. The tick is used as a deterministic
// correlate of time to detect performance or divergence bugs in Turbofan.
// TickAndMaybeEnterSafepoint() should be called frequently thoughout the
// compilation.
class TickCounter {
public:
void TickAndMaybeEnterSafepoint();
void AttachLocalHeap(LocalHeap* local_heap);
void DetachLocalHeap();
size_t CurrentTicks() const { return ticks_; }
private:
size_t ticks_ = 0;
LocalHeap* local_heap_ = nullptr;
};
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_TICK_COUNTER_H_
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