mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
/*
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* Copyright (C) 2013-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(FTL_JIT)
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#include "FTLLocation.h"
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#include "FTLSlowPathCallKey.h"
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#include "MacroAssemblerCodeRef.h"
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#include <wtf/HashMap.h>
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namespace JSC {
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class VM;
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namespace FTL {
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MacroAssemblerCodeRef<JITThunkPtrTag> osrExitGenerationThunkGenerator(VM*);
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MacroAssemblerCodeRef<JITThunkPtrTag> lazySlowPathGenerationThunkGenerator(VM*);
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MacroAssemblerCodeRef<JITThunkPtrTag> slowPathCallThunkGenerator(const SlowPathCallKey&);
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template<typename KeyTypeArgument>
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struct ThunkMap {
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typedef KeyTypeArgument KeyType;
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typedef HashMap<KeyType, MacroAssemblerCodeRef<JITThunkPtrTag>> ToThunkMap;
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typedef HashMap<MacroAssemblerCodePtr<JITThunkPtrTag>, KeyType> FromThunkMap;
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ToThunkMap m_toThunk;
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FromThunkMap m_fromThunk;
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};
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template<typename MapType, typename GeneratorType>
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MacroAssemblerCodeRef<JITThunkPtrTag> generateIfNecessary(
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MapType& map, const typename MapType::KeyType& key, GeneratorType generator)
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{
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typename MapType::ToThunkMap::iterator iter = map.m_toThunk.find(key);
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if (iter != map.m_toThunk.end())
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return iter->value;
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MacroAssemblerCodeRef<JITThunkPtrTag> result = generator(key);
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map.m_toThunk.add(key, result);
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map.m_fromThunk.add(result.code(), key);
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return result;
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}
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template<typename MapType>
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typename MapType::KeyType keyForThunk(MapType& map, MacroAssemblerCodePtr<JITThunkPtrTag> ptr)
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{
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typename MapType::FromThunkMap::iterator iter = map.m_fromThunk.find(ptr);
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RELEASE_ASSERT(iter != map.m_fromThunk.end());
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return iter->value;
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}
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class Thunks {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(Thunks);
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public:
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Thunks() = default;
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MacroAssemblerCodeRef<JITThunkPtrTag> getSlowPathCallThunk(const SlowPathCallKey& key)
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{
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return generateIfNecessary(
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m_slowPathCallThunks, key, slowPathCallThunkGenerator);
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}
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SlowPathCallKey keyForSlowPathCallThunk(MacroAssemblerCodePtr<JITThunkPtrTag> ptr)
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{
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return keyForThunk(m_slowPathCallThunks, ptr);
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}
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private:
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ThunkMap<SlowPathCallKey> m_slowPathCallThunks;
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};
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} } // namespace JSC::FTL
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#endif // ENABLE(FTL_JIT)
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