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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_HEAP_MARKING_BARRIER_H_
#define V8_HEAP_MARKING_BARRIER_H_
#include "include/v8-internal.h"
#include "src/common/globals.h"
#include "src/heap/mark-compact.h"
namespace v8 {
namespace internal {
class Heap;
class IncrementalMarking;
class LocalHeap;
class PagedSpace;
class NewSpace;
class MarkingBarrier {
public:
explicit MarkingBarrier(Heap*);
explicit MarkingBarrier(LocalHeap*);
~MarkingBarrier();
void Activate(bool is_compacting);
void Deactivate();
void Publish();
static void ActivateAll(Heap* heap, bool is_compacting);
static void DeactivateAll(Heap* heap);
static void PublishAll(Heap* heap);
void Write(HeapObject host, HeapObjectSlot, HeapObject value);
void Write(Code host, RelocInfo*, HeapObject value);
void Write(JSArrayBuffer host, ArrayBufferExtension*);
void Write(DescriptorArray, int number_of_own_descriptors);
// Returns true if the slot needs to be recorded.
inline bool MarkValue(HeapObject host, HeapObject value);
private:
using MarkingState = MarkCompactCollector::MarkingState;
inline bool WhiteToGreyAndPush(HeapObject value);
void RecordRelocSlot(Code host, RelocInfo* rinfo, HeapObject target);
void ActivateSpace(PagedSpace*);
void ActivateSpace(NewSpace*);
void DeactivateSpace(PagedSpace*);
void DeactivateSpace(NewSpace*);
bool IsCurrentMarkingBarrier();
Heap* heap_;
MarkCompactCollector* collector_;
IncrementalMarking* incremental_marking_;
MarkingWorklist::Local worklist_;
MarkingState marking_state_;
std::unordered_map<MemoryChunk*, std::unique_ptr<TypedSlots>,
MemoryChunk::Hasher>
typed_slots_map_;
bool is_compacting_ = false;
bool is_activated_ = false;
bool is_main_thread_barrier_;
};
} // namespace internal
} // namespace v8
#endif // V8_HEAP_MARKING_BARRIER_H_
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