projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 81345200 A |
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 | ||
| 36 | namespace JSC { | |
| 37 | ||
| 38 | class VM; | |
| 39 | ||
| 40 | namespace FTL { | |
| 41 | ||
| 42 | MacroAssemblerCodeRef osrExitGenerationThunkGenerator(VM*); | |
| 43 | MacroAssemblerCodeRef slowPathCallThunkGenerator(VM&, const SlowPathCallKey&); | |
| 44 | ||
| 45 | template<typename KeyTypeArgument> | |
| 46 | struct 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 | ||
| 55 | template<typename MapType, typename GeneratorType> | |
| 56 | MacroAssemblerCodeRef 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 | ||
| 69 | template<typename MapType> | |
| 70 | typename 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 | ||
| 77 | class Thunks { | |
| 78 | public: | |
| 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 | ||
| 90 | private: | |
| 91 | ThunkMap<SlowPathCallKey> m_slowPathCallThunks; | |
| 92 | }; | |
| 93 | ||
| 94 | } } // namespace JSC::FTL | |
| 95 | ||
| 96 | #endif // ENABLE(FTL_JIT) | |
| 97 | ||
| 98 | #endif // FTLTHunks_h |