mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-15 05:20:08 +00:00
113 lines
4.3 KiB
C++
113 lines
4.3 KiB
C++
/*
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* Copyright (C) 2012, 2013, 2016 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(JIT)
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#include "CallData.h"
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#include "Intrinsic.h"
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#include "MacroAssemblerCodeRef.h"
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#include "ThunkGenerator.h"
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#include "Weak.h"
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#include "WeakHandleOwner.h"
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#include <tuple>
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#include <wtf/HashMap.h>
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#include <wtf/text/StringHash.h>
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namespace JSC {
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namespace DOMJIT {
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class Signature;
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}
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class VM;
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class NativeExecutable;
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class JITThunks final : private WeakHandleOwner {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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JITThunks();
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virtual ~JITThunks();
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MacroAssemblerCodePtr ctiNativeCall(VM*);
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MacroAssemblerCodePtr ctiNativeConstruct(VM*);
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MacroAssemblerCodePtr ctiNativeTailCall(VM*);
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MacroAssemblerCodePtr ctiNativeTailCallWithoutSavedTags(VM*);
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MacroAssemblerCodeRef ctiStub(VM*, ThunkGenerator);
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MacroAssemblerCodeRef existingCTIStub(ThunkGenerator);
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NativeExecutable* hostFunctionStub(VM*, NativeFunction, NativeFunction constructor, const String& name);
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NativeExecutable* hostFunctionStub(VM*, NativeFunction, NativeFunction constructor, ThunkGenerator, Intrinsic, const DOMJIT::Signature*, const String& name);
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NativeExecutable* hostFunctionStub(VM*, NativeFunction, ThunkGenerator, Intrinsic, const String& name);
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void clearHostFunctionStubs();
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private:
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void finalize(Handle<Unknown>, void* context) override;
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typedef HashMap<ThunkGenerator, MacroAssemblerCodeRef> CTIStubMap;
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CTIStubMap m_ctiStubMap;
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typedef std::tuple<NativeFunction, NativeFunction, String> HostFunctionKey;
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struct HostFunctionHash {
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static unsigned hash(const HostFunctionKey& key)
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{
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unsigned hash = WTF::pairIntHash(hashPointer(std::get<0>(key)), hashPointer(std::get<1>(key)));
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if (!std::get<2>(key).isNull())
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hash = WTF::pairIntHash(hash, DefaultHash<String>::Hash::hash(std::get<2>(key)));
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return hash;
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}
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static bool equal(const HostFunctionKey& a, const HostFunctionKey& b)
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{
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return (std::get<0>(a) == std::get<0>(b)) && (std::get<1>(a) == std::get<1>(b)) && (std::get<2>(a) == std::get<2>(b));
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}
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static const bool safeToCompareToEmptyOrDeleted = true;
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private:
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static inline unsigned hashPointer(NativeFunction p)
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{
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return DefaultHash<NativeFunction>::Hash::hash(p);
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}
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};
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struct HostFunctionHashTrait : WTF::GenericHashTraits<HostFunctionKey> {
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static const bool emptyValueIsZero = true;
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static EmptyValueType emptyValue() { return std::make_tuple(nullptr, nullptr, String()); }
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static void constructDeletedValue(HostFunctionKey& slot) { std::get<0>(slot) = reinterpret_cast<NativeFunction>(-1); }
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static bool isDeletedValue(const HostFunctionKey& value) { return std::get<0>(value) == reinterpret_cast<NativeFunction>(-1); }
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};
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typedef HashMap<HostFunctionKey, Weak<NativeExecutable>, HostFunctionHash, HostFunctionHashTrait> HostFunctionStubMap;
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std::unique_ptr<HostFunctionStubMap> m_hostFunctionStubMap;
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Lock m_lock;
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};
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} // namespace JSC
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#endif // ENABLE(JIT)
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