mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
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* Copyright (C) 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 "StructureIDTable.h"
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#include "VM.h"
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#include <wtf/Vector.h>
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namespace JSC {
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class JSCell;
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class JSGlobalObject;
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class JSObject;
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class PropertySlot;
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class Structure;
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class PolyProtoAccessChain {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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PolyProtoAccessChain(PolyProtoAccessChain&) = default;
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// Returns nullptr when invalid.
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static std::unique_ptr<PolyProtoAccessChain> create(JSGlobalObject*, JSCell* base, const PropertySlot&);
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static std::unique_ptr<PolyProtoAccessChain> create(JSGlobalObject*, JSCell* base, JSObject* target);
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std::unique_ptr<PolyProtoAccessChain> clone()
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{
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return makeUnique<PolyProtoAccessChain>(*this);
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}
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const Vector<StructureID>& chain() const { return m_chain; }
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void dump(Structure* baseStructure, PrintStream& out) const;
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bool operator==(const PolyProtoAccessChain& other) const;
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bool operator!=(const PolyProtoAccessChain& other) const
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{
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return !(*this == other);
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}
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bool needImpurePropertyWatchpoint(VM&) const;
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template <typename Func>
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void forEach(VM& vm, Structure* baseStructure, const Func& func) const
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{
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bool atEnd = !m_chain.size();
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func(baseStructure, atEnd);
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for (unsigned i = 0; i < m_chain.size(); ++i) {
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atEnd = i + 1 == m_chain.size();
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func(vm.getStructure(m_chain[i]), atEnd);
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}
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}
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Structure* slotBaseStructure(VM& vm, Structure* baseStructure) const
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{
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if (m_chain.size())
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return vm.getStructure(m_chain.last());
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return baseStructure;
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}
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private:
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PolyProtoAccessChain() = default;
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// This does not include the base. We rely on AccessCase providing it for us. That said, this data
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// structure is tied to the base that it was created with.
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Vector<StructureID> m_chain;
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};
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}
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