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// Copyright 2021 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_WEAK_CODE_REGISTRY_H_
#define V8_PROFILER_WEAK_CODE_REGISTRY_H_
#include <vector>
#include "src/execution/isolate.h"
#include "src/objects/objects.h"
#include "src/profiler/profile-generator.h"
namespace v8 {
namespace internal {
class V8_EXPORT_PRIVATE WeakCodeRegistry {
public:
struct Listener {
virtual void OnHeapObjectDeletion(CodeEntry* entry) = 0;
};
explicit WeakCodeRegistry(Isolate* isolate) : isolate_(isolate) {}
~WeakCodeRegistry() { Clear(); }
void Track(CodeEntry* entry, Handle<AbstractCode> code);
// Removes all dead code objects from the registry, invoking the provided
// listener for each new CodeEntry that is no longer referenced on the heap
// (if set).
void Sweep(Listener* listener);
// Removes all heap object tracking from stored CodeEntries.
void Clear();
private:
Isolate* const isolate_;
// Invariant: Entries will always be removed here before the
// InstructionStreamMap is destroyed. CodeEntries should not be freed while
// their heap objects exist.
std::vector<CodeEntry*> entries_;
};
} // namespace internal
} // namespace v8
#endif // V8_PROFILER_WEAK_CODE_REGISTRY_H_
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