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// Copyright 2018 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_HEAP_WRITE_BARRIER_H_
#define V8_HEAP_HEAP_WRITE_BARRIER_H_
#include "include/v8-internal.h"
#include "src/base/optional.h"
#include "src/common/globals.h"
namespace v8 {
namespace internal {
class ArrayBufferExtension;
class Code;
class DescriptorArray;
class EphemeronHashTable;
class FixedArray;
class Heap;
class JSArrayBuffer;
class Map;
class MarkCompactCollector;
class MarkingBarrier;
class RelocInfo;
// Note: In general it is preferred to use the macros defined in
// object-macros.h.
// Combined write barriers.
void WriteBarrierForCode(Code host, RelocInfo* rinfo, Object value);
void WriteBarrierForCode(Code host, RelocInfo* rinfo, HeapObject value);
void WriteBarrierForCode(Code host);
// Generational write barrier.
void GenerationalBarrier(HeapObject object, ObjectSlot slot, Object value);
void GenerationalBarrier(HeapObject object, ObjectSlot slot, Code value);
void GenerationalBarrier(HeapObject object, ObjectSlot slot, HeapObject value);
void GenerationalBarrier(HeapObject object, MaybeObjectSlot slot,
MaybeObject value);
void GenerationalEphemeronKeyBarrier(EphemeronHashTable table, ObjectSlot slot,
Object value);
void GenerationalBarrierForCode(Code host, RelocInfo* rinfo, HeapObject object);
inline bool IsReadOnlyHeapObject(HeapObject object);
class V8_EXPORT_PRIVATE WriteBarrier {
public:
static inline void Marking(HeapObject host, ObjectSlot, Object value);
static inline void Marking(HeapObject host, HeapObjectSlot, HeapObject value);
static inline void Marking(HeapObject host, MaybeObjectSlot,
MaybeObject value);
static inline void Marking(Code host, RelocInfo*, HeapObject value);
static inline void Marking(JSArrayBuffer host, ArrayBufferExtension*);
static inline void Marking(DescriptorArray, int number_of_own_descriptors);
// It is invoked from generated code and has to take raw addresses.
static int MarkingFromCode(Address raw_host, Address raw_slot);
// Invoked from global handles where no host object is available.
static inline void MarkingFromGlobalHandle(Object value);
static void SetForThread(MarkingBarrier*);
static void ClearForThread(MarkingBarrier*);
static MarkingBarrier* CurrentMarkingBarrier(Heap* heap);
private:
static inline base::Optional<Heap*> GetHeapIfMarking(HeapObject object);
static void MarkingSlow(Heap* heap, HeapObject host, HeapObjectSlot,
HeapObject value);
static void MarkingSlow(Heap* heap, Code host, RelocInfo*, HeapObject value);
static void MarkingSlow(Heap* heap, JSArrayBuffer host,
ArrayBufferExtension*);
static void MarkingSlow(Heap* heap, DescriptorArray,
int number_of_own_descriptors);
static void MarkingSlowFromGlobalHandle(Heap* heap, HeapObject value);
};
} // namespace internal
} // namespace v8
#endif // V8_HEAP_HEAP_WRITE_BARRIER_H_
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