1/* 2 * Copyright (C) 2007, 2008, 2012 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#ifndef JSVariableObject_h 30#define JSVariableObject_h 31 32#include "JSObject.h" 33#include "JSSymbolTableObject.h" 34#include "Register.h" 35#include "SymbolTable.h" 36 37namespace JSC { 38 39class LLIntOffsetsExtractor; 40class Register; 41 42class JSVariableObject : public JSSymbolTableObject { 43 friend class JIT; 44 friend class LLIntOffsetsExtractor; 45 46public: 47 typedef JSSymbolTableObject Base; 48 49 WriteBarrierBase<Unknown>* registers() { return m_registers; } 50 WriteBarrierBase<Unknown>& registerAt(int index) const { return m_registers[index]; } 51 52 WriteBarrierBase<Unknown>* const * addressOfRegisters() const { return &m_registers; } 53 static size_t offsetOfRegisters() { return OBJECT_OFFSETOF(JSVariableObject, m_registers); } 54 55 DECLARE_INFO; 56 57protected: 58 static const unsigned StructureFlags = Base::StructureFlags; 59 60 JSVariableObject( 61 VM& vm, 62 Structure* structure, 63 Register* registers, 64 JSScope* scope, 65 SymbolTable* symbolTable = 0) 66 : Base(vm, structure, scope, symbolTable) 67 , m_registers(reinterpret_cast<WriteBarrierBase<Unknown>*>(registers)) 68 { 69 } 70 71 WriteBarrierBase<Unknown>* m_registers; // "r" in the stack. 72}; 73 74} // namespace JSC 75 76#endif // JSVariableObject_h 77