mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-16 13:59:53 +00:00
120 lines
4.8 KiB
C++
120 lines
4.8 KiB
C++
/*
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* Copyright (C) 2013, 2014 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ClassInfo.h"
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#include "JSCast.h"
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#include "JSTypeInfo.h"
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#include "PropertyOffset.h"
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#include "PropertySlot.h"
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namespace JSC {
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class JSPropertyNameEnumerator;
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class Structure;
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class ObjectToStringAdaptiveInferredPropertyValueWatchpoint;
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class ObjectToStringAdaptiveStructureWatchpoint;
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class StructureRareData final : public JSCell {
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public:
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typedef JSCell Base;
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static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
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template<typename CellType, SubspaceAccess>
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static IsoSubspace* subspaceFor(VM& vm)
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{
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return &vm.structureRareDataSpace;
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}
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static StructureRareData* create(VM&, Structure*);
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static const bool needsDestruction = true;
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static void destroy(JSCell*);
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static void visitChildren(JSCell*, SlotVisitor&);
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static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
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Structure* previousID() const
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{
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return m_previous.get();
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}
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void setPreviousID(VM&, Structure*);
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void clearPreviousID();
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JSString* objectToStringValue() const;
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void setObjectToStringValue(ExecState*, VM&, Structure* baseStructure, JSString* value, PropertySlot toStringTagSymbolSlot);
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JSPropertyNameEnumerator* cachedPropertyNameEnumerator() const;
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void setCachedPropertyNameEnumerator(VM&, JSPropertyNameEnumerator*);
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JSImmutableButterfly* cachedOwnKeys() const;
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JSImmutableButterfly* cachedOwnKeysIgnoringSentinel() const;
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JSImmutableButterfly* cachedOwnKeysConcurrently() const;
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void setCachedOwnKeys(VM&, JSImmutableButterfly*);
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Box<InlineWatchpointSet> copySharedPolyProtoWatchpoint() const { return m_polyProtoWatchpoint; }
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const Box<InlineWatchpointSet>& sharedPolyProtoWatchpoint() const { return m_polyProtoWatchpoint; }
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void setSharedPolyProtoWatchpoint(Box<InlineWatchpointSet>&& sharedPolyProtoWatchpoint) { m_polyProtoWatchpoint = WTFMove(sharedPolyProtoWatchpoint); }
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bool hasSharedPolyProtoWatchpoint() const { return static_cast<bool>(m_polyProtoWatchpoint); }
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static JSImmutableButterfly* cachedOwnKeysSentinel() { return bitwise_cast<JSImmutableButterfly*>(static_cast<uintptr_t>(1)); }
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static ptrdiff_t offsetOfCachedOwnKeys()
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{
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return OBJECT_OFFSETOF(StructureRareData, m_cachedOwnKeys);
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}
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DECLARE_EXPORT_INFO;
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void finalizeUnconditionally(VM&);
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private:
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friend class Structure;
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friend class ObjectToStringAdaptiveStructureWatchpoint;
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friend class ObjectToStringAdaptiveInferredPropertyValueWatchpoint;
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void clearObjectToStringValue();
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StructureRareData(VM&, Structure*);
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WriteBarrier<Structure> m_previous;
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WriteBarrier<JSString> m_objectToStringValue;
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// FIXME: We should have some story for clearing these property names caches in GC.
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// https://bugs.webkit.org/show_bug.cgi?id=192659
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WriteBarrier<JSPropertyNameEnumerator> m_cachedPropertyNameEnumerator;
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WriteBarrier<JSImmutableButterfly> m_cachedOwnKeys;
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typedef HashMap<PropertyOffset, RefPtr<WatchpointSet>, WTF::IntHash<PropertyOffset>, WTF::UnsignedWithZeroKeyHashTraits<PropertyOffset>> PropertyWatchpointMap;
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std::unique_ptr<PropertyWatchpointMap> m_replacementWatchpointSets;
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Bag<ObjectToStringAdaptiveStructureWatchpoint> m_objectToStringAdaptiveWatchpointSet;
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std::unique_ptr<ObjectToStringAdaptiveInferredPropertyValueWatchpoint> m_objectToStringAdaptiveInferredValueWatchpoint;
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Box<InlineWatchpointSet> m_polyProtoWatchpoint;
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bool m_giveUpOnObjectToStringValueCache;
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};
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} // namespace JSC
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