mirror of
https://gitee.com/openharmony/arkcompiler_ets_runtime
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108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ECMASCRIPT_FREE_OBJECT_H
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#define ECMASCRIPT_FREE_OBJECT_H
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#include "ecmascript/js_hclass.h"
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#include "ecmascript/mem/barriers.h"
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#include "ecmascript/mem/tagged_object-inl.h"
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#define INVALID_OBJECT ((FreeObject *) JSTaggedValue::NULL_POINTER)
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namespace panda::ecmascript {
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class FreeObject : public TaggedObject {
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public:
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static FreeObject *Cast(uintptr_t object)
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{
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return reinterpret_cast<FreeObject *>(object);
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}
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static FreeObject *FillFreeObject(EcmaVM *vm, uintptr_t address, size_t size);
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inline bool IsEmpty() const
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{
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return Available() == 0;
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}
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inline uintptr_t GetBegin() const
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{
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return reinterpret_cast<uintptr_t>(this);
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}
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inline uintptr_t GetEnd() const
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{
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return reinterpret_cast<uintptr_t>(this) + Available();
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}
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inline void SetAvailable(uint32_t size)
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{
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if (size >= SIZE) {
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Barriers::SetPrimitive<JSTaggedType>(this, SIZE_OFFSET, JSTaggedValue(size).GetRawData());
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}
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}
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inline uint32_t Available() const
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{
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auto hclass = GetClass();
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if (hclass->IsFreeObjectWithShortField()) {
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return hclass->GetObjectSize();
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}
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ASSERT(GetSize().IsInt());
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return GetSize().GetInt();
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}
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inline bool IsFreeObject() const
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{
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return GetClass()->IsFreeObject();
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}
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// Before operating any freeobject, need to mark unpoison when is_asan is true.
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inline void AsanUnPoisonFreeObject() const
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{
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#ifdef ARK_ASAN_ON
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ASAN_UNPOISON_MEMORY_REGION(this, NEXT_OFFSET);
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if (GetClass()->IsFreeObjectWithOneField()) {
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ASAN_UNPOISON_MEMORY_REGION(this, SIZE_OFFSET);
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} else if (GetClass()->IsFreeObjectWithTwoField()) {
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ASAN_UNPOISON_MEMORY_REGION(this, SIZE);
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}
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#endif
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}
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// After operating any freeobject, need to marked poison again when is_asan is true
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inline void AsanPoisonFreeObject() const
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{
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#ifdef ARK_ASAN_ON
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if (GetClass()->IsFreeObjectWithNoneField()) {
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ASAN_POISON_MEMORY_REGION(this, NEXT_OFFSET);
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} else if (GetClass()->IsFreeObjectWithOneField()) {
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ASAN_POISON_MEMORY_REGION(this, SIZE_OFFSET);
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} else if (GetClass()->IsFreeObjectWithTwoField()) {
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ASAN_POISON_MEMORY_REGION(this, SIZE);
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}
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#endif
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}
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static constexpr size_t NEXT_OFFSET = TaggedObjectSize();
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ACCESSORS_FIXED_SIZE_FIELD(Next, FreeObject *, JSTaggedType, NEXT_OFFSET, SIZE_OFFSET)
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// TaggedArray visitor may be error while concurrent marking
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ACCESSORS(Size, SIZE_OFFSET, SIZE)
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};
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static_assert((FreeObject::SIZE % static_cast<uint8_t>(MemAlignment::MEM_ALIGN_OBJECT)) == 0);
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} // namespace panda::ecmascript
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#endif // ECMASCRIPT_MEM_FREE_OBJECT_H
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