1/* 2 * Copyright (C) 2011 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 DFGOSRExitCompiler_h 27#define DFGOSRExitCompiler_h 28 29#if ENABLE(DFG_JIT) 30 31#include "AssemblyHelpers.h" 32#include "CCallHelpers.h" 33#include "DFGOSRExit.h" 34#include "DFGOperations.h" 35 36namespace JSC { 37 38class ExecState; 39 40namespace DFG { 41 42class OSRExitCompiler { 43public: 44 OSRExitCompiler(CCallHelpers& jit) 45 : m_jit(jit) 46 { 47 } 48 49 void compileExit(const OSRExit&, const Operands<ValueRecovery>&, SpeculationRecovery*); 50 51private: 52#if !ASSERT_DISABLED 53 static unsigned badIndex() { return static_cast<unsigned>(-1); }; 54#endif 55 56 void initializePoisoned(unsigned size) 57 { 58#if ASSERT_DISABLED 59 m_poisonScratchIndices.resize(size); 60#else 61 m_poisonScratchIndices.fill(badIndex(), size); 62#endif 63 } 64 65 unsigned poisonIndex(unsigned index) 66 { 67 unsigned result = m_poisonScratchIndices[index]; 68 ASSERT(result != badIndex()); 69 return result; 70 } 71 72 CCallHelpers& m_jit; 73 Vector<unsigned> m_poisonScratchIndices; 74}; 75 76extern "C" { 77void JIT_OPERATION compileOSRExit(ExecState*) WTF_INTERNAL; 78} 79 80} } // namespace JSC::DFG 81 82#endif // ENABLE(DFG_JIT) 83 84#endif // DFGOSRExitCompiler_h 85