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// Copyright 2012 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_EXECUTION_TIERING_MANAGER_H_
#define V8_EXECUTION_TIERING_MANAGER_H_
#include "src/common/assert-scope.h"
#include "src/handles/handles.h"
#include "src/utils/allocation.h"
namespace v8 {
namespace internal {
class BytecodeArray;
class Isolate;
class JSFunction;
class OptimizationDecision;
enum class CodeKind : uint8_t;
enum class OptimizationReason : uint8_t;
void TraceManualRecompile(JSFunction function, CodeKind code_kind,
ConcurrencyMode concurrency_mode);
class TieringManager {
public:
explicit TieringManager(Isolate* isolate) : isolate_(isolate) {}
void OnInterruptTick(Handle<JSFunction> function, CodeKind code_kind);
void NotifyICChanged(FeedbackVector vector);
// After this request, the next JumpLoop will perform OSR.
void RequestOsrAtNextOpportunity(JSFunction function);
// For use when a JSFunction is available.
static int InterruptBudgetFor(Isolate* isolate, JSFunction function);
// For use when no JSFunction is available.
static int InitialInterruptBudget();
private:
// Make the decision whether to optimize the given function, and mark it for
// optimization if the decision was 'yes'.
// This function is also responsible for bumping the OSR urgency.
void MaybeOptimizeFrame(JSFunction function, CodeKind code_kind);
// After next tick indicates whether we've precremented the ticks before
// calling this function, or whether we're pretending that we already got the
// tick.
OptimizationDecision ShouldOptimize(FeedbackVector feedback_vector,
CodeKind code_kind,
bool after_next_tick = false);
void Optimize(JSFunction function, OptimizationDecision decision);
void Baseline(JSFunction function, OptimizationReason reason);
class V8_NODISCARD OnInterruptTickScope final {
public:
explicit OnInterruptTickScope(TieringManager* profiler);
~OnInterruptTickScope();
private:
TieringManager* const profiler_;
DisallowGarbageCollection no_gc;
};
Isolate* const isolate_;
bool any_ic_changed_ = false;
};
} // namespace internal
} // namespace v8
#endif // V8_EXECUTION_TIERING_MANAGER_H_
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