mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
69 lines
2.9 KiB
C++
69 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2016-2017 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "JSGlobalObject.h"
|
|
#include "SlotVisitor.h"
|
|
#include "WriteBarrier.h"
|
|
|
|
namespace JSC {
|
|
|
|
class InternalFunctionAllocationProfile {
|
|
public:
|
|
static inline ptrdiff_t offsetOfStructure() { return OBJECT_OFFSETOF(InternalFunctionAllocationProfile, m_structure); }
|
|
|
|
Structure* structure() { return m_structure.get(); }
|
|
Structure* createAllocationStructureFromBase(VM&, JSGlobalObject*, JSCell* owner, JSObject* prototype, Structure* base);
|
|
|
|
void clear() { m_structure.clear(); }
|
|
void visitAggregate(SlotVisitor& visitor) { visitor.append(m_structure); }
|
|
|
|
private:
|
|
WriteBarrier<Structure> m_structure;
|
|
};
|
|
|
|
inline Structure* InternalFunctionAllocationProfile::createAllocationStructureFromBase(VM& vm, JSGlobalObject* baseGlobalObject, JSCell* owner, JSObject* prototype, Structure* baseStructure)
|
|
{
|
|
ASSERT(!m_structure || m_structure.get()->classInfo() != baseStructure->classInfo() || m_structure->globalObject() != baseGlobalObject);
|
|
ASSERT(baseStructure->hasMonoProto());
|
|
|
|
Structure* structure;
|
|
// FIXME: Implement polymorphic prototypes for subclasses of builtin types:
|
|
// https://bugs.webkit.org/show_bug.cgi?id=177318
|
|
if (prototype == baseStructure->storedPrototype())
|
|
structure = baseStructure;
|
|
else
|
|
structure = vm.structureCache.emptyStructureForPrototypeFromBaseStructure(baseGlobalObject, prototype, baseStructure);
|
|
|
|
// Ensure that if another thread sees the structure, it will see it properly created.
|
|
WTF::storeStoreFence();
|
|
|
|
m_structure.set(vm, owner, structure);
|
|
return m_structure.get();
|
|
}
|
|
|
|
} // namespace JSC
|