mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
131 lines
4.0 KiB
C++
131 lines
4.0 KiB
C++
/*
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* Copyright (C) 2013-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "VM.h"
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#include "JSGlobalObject.h"
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#include "ObjectPrototype.h"
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#include "SlotVisitor.h"
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#include "WriteBarrier.h"
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namespace JSC {
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class FunctionRareData;
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template<typename Derived>
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class ObjectAllocationProfileBase {
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friend class LLIntOffsetsExtractor;
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public:
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static ptrdiff_t offsetOfAllocator() { return OBJECT_OFFSETOF(ObjectAllocationProfileBase, m_allocator); }
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static ptrdiff_t offsetOfStructure() { return OBJECT_OFFSETOF(ObjectAllocationProfileBase, m_structure); }
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ObjectAllocationProfileBase() = default;
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bool isNull() { return !m_structure; }
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void initializeProfile(VM&, JSGlobalObject*, JSCell* owner, JSObject* prototype, unsigned inferredInlineCapacity, JSFunction* constructor = nullptr, FunctionRareData* = nullptr);
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Structure* structure()
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{
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Structure* structure = m_structure.get();
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// Ensure that if we see the structure, it has been properly created
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WTF::loadLoadFence();
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return structure;
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}
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protected:
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void clear()
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{
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m_allocator = Allocator();
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m_structure.clear();
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ASSERT(isNull());
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}
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void visitAggregate(SlotVisitor& visitor)
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{
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visitor.append(m_structure);
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}
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private:
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unsigned possibleDefaultPropertyCount(VM&, JSObject* prototype);
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Allocator m_allocator; // Precomputed to make things easier for generated code.
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WriteBarrier<Structure> m_structure;
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};
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class ObjectAllocationProfile : public ObjectAllocationProfileBase<ObjectAllocationProfile> {
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public:
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using Base = ObjectAllocationProfileBase<ObjectAllocationProfile>;
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ObjectAllocationProfile() = default;
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using Base::clear;
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using Base::visitAggregate;
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void setPrototype(VM&, JSCell*, JSObject*) { }
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};
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class ObjectAllocationProfileWithPrototype : public ObjectAllocationProfileBase<ObjectAllocationProfileWithPrototype> {
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public:
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using Base = ObjectAllocationProfileBase<ObjectAllocationProfileWithPrototype>;
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static ptrdiff_t offsetOfPrototype() { return OBJECT_OFFSETOF(ObjectAllocationProfileWithPrototype, m_prototype); }
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ObjectAllocationProfileWithPrototype() = default;
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JSObject* prototype()
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{
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JSObject* prototype = m_prototype.get();
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WTF::loadLoadFence();
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return prototype;
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}
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void clear()
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{
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Base::clear();
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m_prototype.clear();
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ASSERT(isNull());
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}
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void visitAggregate(SlotVisitor& visitor)
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{
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Base::visitAggregate(visitor);
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visitor.append(m_prototype);
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}
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void setPrototype(VM& vm, JSCell* owner, JSObject* object)
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{
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m_prototype.set(vm, owner, object);
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}
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private:
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WriteBarrier<JSObject> m_prototype;
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};
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} // namespace JSC
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