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// Copyright 2022 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_EVACUATION_VERIFIER_H_
#define V8_HEAP_EVACUATION_VERIFIER_H_
#include "src/heap/new-spaces.h"
#include "src/heap/paged-spaces.h"
#include "src/objects/map.h"
#include "src/objects/visitors.h"
namespace v8 {
namespace internal {
#ifdef VERIFY_HEAP
class EvacuationVerifier : public ObjectVisitorWithCageBases,
public RootVisitor {
public:
virtual void Run() = 0;
void VisitPointers(HeapObject host, ObjectSlot start,
ObjectSlot end) override;
void VisitPointers(HeapObject host, MaybeObjectSlot start,
MaybeObjectSlot end) override;
void VisitCodePointer(Code host, CodeObjectSlot slot) override;
void VisitRootPointers(Root root, const char* description,
FullObjectSlot start, FullObjectSlot end) override;
void VisitMapPointer(HeapObject object) override;
protected:
explicit EvacuationVerifier(Heap* heap);
inline Heap* heap() { return heap_; }
virtual void VerifyMap(Map map) = 0;
virtual void VerifyPointers(ObjectSlot start, ObjectSlot end) = 0;
virtual void VerifyPointers(MaybeObjectSlot start, MaybeObjectSlot end) = 0;
virtual void VerifyCodePointer(CodeObjectSlot slot) = 0;
virtual void VerifyRootPointers(FullObjectSlot start, FullObjectSlot end) = 0;
void VerifyRoots();
void VerifyEvacuationOnPage(Address start, Address end);
void VerifyEvacuation(NewSpace* new_space);
void VerifyEvacuation(PagedSpaceBase* paged_space);
Heap* heap_;
};
class FullEvacuationVerifier : public EvacuationVerifier {
public:
explicit FullEvacuationVerifier(Heap* heap);
void Run() override;
protected:
V8_INLINE void VerifyHeapObjectImpl(HeapObject heap_object);
V8_INLINE bool ShouldVerifyObject(HeapObject heap_object);
template <typename TSlot>
void VerifyPointersImpl(TSlot start, TSlot end);
void VerifyMap(Map map) override;
void VerifyPointers(ObjectSlot start, ObjectSlot end) override;
void VerifyPointers(MaybeObjectSlot start, MaybeObjectSlot end) override;
void VerifyCodePointer(CodeObjectSlot slot) override;
void VisitCodeTarget(RelocInfo* rinfo) override;
void VisitEmbeddedPointer(RelocInfo* rinfo) override;
void VerifyRootPointers(FullObjectSlot start, FullObjectSlot end) override;
};
class YoungGenerationEvacuationVerifier : public EvacuationVerifier {
public:
explicit YoungGenerationEvacuationVerifier(Heap* heap);
void Run() override;
protected:
V8_INLINE void VerifyHeapObjectImpl(HeapObject heap_object);
template <typename TSlot>
void VerifyPointersImpl(TSlot start, TSlot end);
void VerifyMap(Map map) override;
void VerifyPointers(ObjectSlot start, ObjectSlot end) override;
void VerifyPointers(MaybeObjectSlot start, MaybeObjectSlot end) override;
void VerifyCodePointer(CodeObjectSlot slot) override;
void VisitCodeTarget(RelocInfo* rinfo) override;
void VisitEmbeddedPointer(RelocInfo* rinfo) override;
void VerifyRootPointers(FullObjectSlot start, FullObjectSlot end) override;
};
#endif // VERIFY_HEAP
} // namespace internal
} // namespace v8
#endif // V8_HEAP_EVACUATION_VERIFIER_H_
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