1/* 2 * Copyright (C) 2013 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 FTLThunks_h 27#define FTLThunks_h 28 29#if ENABLE(FTL_JIT) 30 31#include "FTLLocation.h" 32#include "FTLSlowPathCallKey.h" 33#include "MacroAssemblerCodeRef.h" 34#include <wtf/HashMap.h> 35 36namespace JSC { 37 38class VM; 39 40namespace FTL { 41 42MacroAssemblerCodeRef osrExitGenerationThunkGenerator(VM*); 43MacroAssemblerCodeRef slowPathCallThunkGenerator(VM&, const SlowPathCallKey&); 44 45template<typename KeyTypeArgument> 46struct ThunkMap { 47 typedef KeyTypeArgument KeyType; 48 typedef HashMap<KeyType, MacroAssemblerCodeRef> ToThunkMap; 49 typedef HashMap<MacroAssemblerCodePtr, KeyType> FromThunkMap; 50 51 ToThunkMap m_toThunk; 52 FromThunkMap m_fromThunk; 53}; 54 55template<typename MapType, typename GeneratorType> 56MacroAssemblerCodeRef generateIfNecessary( 57 VM& vm, MapType& map, const typename MapType::KeyType& key, GeneratorType generator) 58{ 59 typename MapType::ToThunkMap::iterator iter = map.m_toThunk.find(key); 60 if (iter != map.m_toThunk.end()) 61 return iter->value; 62 63 MacroAssemblerCodeRef result = generator(vm, key); 64 map.m_toThunk.add(key, result); 65 map.m_fromThunk.add(result.code(), key); 66 return result; 67} 68 69template<typename MapType> 70typename MapType::KeyType keyForThunk(MapType& map, MacroAssemblerCodePtr ptr) 71{ 72 typename MapType::FromThunkMap::iterator iter = map.m_fromThunk.find(ptr); 73 RELEASE_ASSERT(iter != map.m_fromThunk.end()); 74 return iter->value; 75} 76 77class Thunks { 78public: 79 MacroAssemblerCodeRef getSlowPathCallThunk(VM& vm, const SlowPathCallKey& key) 80 { 81 return generateIfNecessary( 82 vm, m_slowPathCallThunks, key, slowPathCallThunkGenerator); 83 } 84 85 SlowPathCallKey keyForSlowPathCallThunk(MacroAssemblerCodePtr ptr) 86 { 87 return keyForThunk(m_slowPathCallThunks, ptr); 88 } 89 90private: 91 ThunkMap<SlowPathCallKey> m_slowPathCallThunks; 92}; 93 94} } // namespace JSC::FTL 95 96#endif // ENABLE(FTL_JIT) 97 98#endif // FTLTHunks_h 99