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/*
* Copyright (C) 2012-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(JIT)
#include "CallData.h"
#include "Intrinsic.h"
#include "MacroAssemblerCodeRef.h"
#include "SlowPathFunction.h"
#include "ThunkGenerator.h"
#include "Weak.h"
#include "WeakHandleOwner.h"
#include <tuple>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/PackedRefPtr.h>
#include <wtf/RecursiveLockAdapter.h>
#include <wtf/text/StringHash.h>
namespace JSC {
namespace DOMJIT {
class Signature;
}
class VM;
class NativeExecutable;
class JITThunks final : private WeakHandleOwner {
WTF_MAKE_FAST_ALLOCATED;
public:
JITThunks();
~JITThunks() final;
MacroAssemblerCodePtr<JITThunkPtrTag> ctiNativeCall(VM&);
MacroAssemblerCodePtr<JITThunkPtrTag> ctiNativeConstruct(VM&);
MacroAssemblerCodePtr<JITThunkPtrTag> ctiNativeTailCall(VM&);
MacroAssemblerCodePtr<JITThunkPtrTag> ctiNativeTailCallWithoutSavedTags(VM&);
MacroAssemblerCodePtr<JITThunkPtrTag> ctiInternalFunctionCall(VM&);
MacroAssemblerCodePtr<JITThunkPtrTag> ctiInternalFunctionConstruct(VM&);
MacroAssemblerCodeRef<JITThunkPtrTag> ctiStub(VM&, ThunkGenerator);
#if ENABLE(EXTRA_CTI_THUNKS)
MacroAssemblerCodeRef<JITThunkPtrTag> ctiSlowPathFunctionStub(VM&, SlowPathFunction);
#endif
NativeExecutable* hostFunctionStub(VM&, TaggedNativeFunction, TaggedNativeFunction constructor, const String& name);
NativeExecutable* hostFunctionStub(VM&, TaggedNativeFunction, TaggedNativeFunction constructor, ThunkGenerator, Intrinsic, const DOMJIT::Signature*, const String& name);
NativeExecutable* hostFunctionStub(VM&, TaggedNativeFunction, ThunkGenerator, Intrinsic, const String& name);
private:
template <typename GenerateThunk>
MacroAssemblerCodeRef<JITThunkPtrTag> ctiStubImpl(ThunkGenerator key, GenerateThunk);
void finalize(Handle<Unknown>, void* context) final;
struct Entry {
PackedRefPtr<ExecutableMemoryHandle> handle;
bool needsCrossModifyingCodeFence;
};
using CTIStubMap = HashMap<ThunkGenerator, Entry>;
CTIStubMap m_ctiStubMap;
using HostFunctionKey = std::tuple<TaggedNativeFunction, TaggedNativeFunction, String>;
struct WeakNativeExecutableHash {
static inline unsigned hash(const Weak<NativeExecutable>&);
static inline unsigned hash(NativeExecutable*);
static unsigned hash(const HostFunctionKey& key)
{
return hash(std::get<0>(key), std::get<1>(key), std::get<2>(key));
}
static inline bool equal(const Weak<NativeExecutable>&, const Weak<NativeExecutable>&);
static inline bool equal(const Weak<NativeExecutable>&, const HostFunctionKey&);
static inline bool equal(const Weak<NativeExecutable>&, NativeExecutable*);
static inline bool equal(NativeExecutable&, NativeExecutable&);
static constexpr bool safeToCompareToEmptyOrDeleted = false;
private:
static inline unsigned hashPointer(TaggedNativeFunction p)
{
return DefaultHash<TaggedNativeFunction>::hash(p);
}
static unsigned hash(TaggedNativeFunction function, TaggedNativeFunction constructor, const String& name)
{
// FIXME: Use WTF::computeHash.
// https://bugs.webkit.org/show_bug.cgi?id=207835
unsigned hash = WTF::pairIntHash(hashPointer(function), hashPointer(constructor));
if (!name.isNull())
hash = WTF::pairIntHash(hash, DefaultHash<String>::hash(name));
return hash;
}
};
struct HostKeySearcher;
struct NativeExecutableTranslator;
using WeakNativeExecutableSet = HashSet<Weak<NativeExecutable>, WeakNativeExecutableHash>;
WeakNativeExecutableSet m_nativeExecutableSet;
WTF::RecursiveLock m_lock;
};
} // namespace JSC
#endif // ENABLE(JIT)
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