mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-30 07:30:47 +00:00
69 lines
2.9 KiB
C++
69 lines
2.9 KiB
C++
/*
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* Copyright (C) 2016-2017 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 "JSGlobalObject.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 InternalFunctionAllocationProfile {
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public:
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static inline ptrdiff_t offsetOfStructure() { return OBJECT_OFFSETOF(InternalFunctionAllocationProfile, m_structure); }
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Structure* structure() { return m_structure.get(); }
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Structure* createAllocationStructureFromBase(VM&, JSGlobalObject*, JSCell* owner, JSObject* prototype, Structure* base);
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void clear() { m_structure.clear(); }
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void visitAggregate(SlotVisitor& visitor) { visitor.append(m_structure); }
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private:
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WriteBarrier<Structure> m_structure;
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};
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inline Structure* InternalFunctionAllocationProfile::createAllocationStructureFromBase(VM& vm, JSGlobalObject* baseGlobalObject, JSCell* owner, JSObject* prototype, Structure* baseStructure)
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{
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ASSERT(!m_structure || m_structure.get()->classInfo() != baseStructure->classInfo() || m_structure->globalObject() != baseGlobalObject);
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ASSERT(baseStructure->hasMonoProto());
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Structure* structure;
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// FIXME: Implement polymorphic prototypes for subclasses of builtin types:
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// https://bugs.webkit.org/show_bug.cgi?id=177318
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if (prototype == baseStructure->storedPrototype())
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structure = baseStructure;
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else
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structure = vm.structureCache.emptyStructureForPrototypeFromBaseStructure(baseGlobalObject, prototype, baseStructure);
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// Ensure that if another thread sees the structure, it will see it properly created.
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WTF::storeStoreFence();
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m_structure.set(vm, owner, structure);
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return m_structure.get();
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}
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} // namespace JSC
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