1/* 2 * Copyright (C) 2013, 2014 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef IntendedStructureChain_h 27#define IntendedStructureChain_h 28 29#include "Structure.h" 30#include <wtf/RefCounted.h> 31 32namespace JSC { 33 34class CodeBlock; 35class JSGlobalObject; 36class StructureChain; 37class VM; 38struct DumpContext; 39 40class IntendedStructureChain : public RefCounted<IntendedStructureChain> { 41public: 42 IntendedStructureChain(JSGlobalObject* globalObject, Structure* head); 43 IntendedStructureChain(CodeBlock* codeBlock, Structure* head, Structure* prototypeStructure); 44 IntendedStructureChain(CodeBlock* codeBlock, Structure* head, StructureChain* chain); 45 IntendedStructureChain(CodeBlock* codeBlock, Structure* head, StructureChain* chain, unsigned count); 46 ~IntendedStructureChain(); 47 48 bool isStillValid() const; 49 bool matches(StructureChain*) const; 50 StructureChain* chain(VM&) const; 51 bool mayInterceptStoreTo(VM&, StringImpl* uid); 52 bool isNormalized(); 53 54 Structure* head() const { return m_head; } 55 56 size_t size() const { return m_vector.size(); } 57 Structure* at(size_t index) { return m_vector[index]; } 58 Structure* operator[](size_t index) { return at(index); } 59 60 JSObject* terminalPrototype() const; 61 62 Structure* last() const { return m_vector.last(); } 63 64 void visitChildren(SlotVisitor&); 65 void dump(PrintStream&) const; 66 void dumpInContext(PrintStream&, DumpContext*) const; 67 68private: 69 JSGlobalObject* m_globalObject; 70 Structure* m_head; 71 Vector<Structure*> m_vector; 72}; 73 74} // namespace JSC 75 76#endif // IntendedStructureChain_h 77