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/*
* Copyright (C) 2012-2018 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.
*/
#include "config.h"
#include "JITThunks.h"
#if ENABLE(JIT)
#include "JIT.h"
#include "JSCInlines.h"
#include "LLIntData.h"
#include "ThunkGenerators.h"
#include "VM.h"
namespace JSC {
JITThunks::JITThunks()
: m_hostFunctionStubMap(std::make_unique<HostFunctionStubMap>())
{
}
JITThunks::~JITThunks()
{
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiNativeCall(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, nativeCallGenerator).code();
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiNativeConstruct(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, nativeConstructGenerator).code();
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiNativeTailCall(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, nativeTailCallGenerator).code();
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiNativeTailCallWithoutSavedTags(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, nativeTailCallWithoutSavedTagsGenerator).code();
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiInternalFunctionCall(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, internalFunctionCallGenerator).code();
}
MacroAssemblerCodePtr<JITThunkPtrTag> JITThunks::ctiInternalFunctionConstruct(VM* vm)
{
ASSERT(VM::canUseJIT());
return ctiStub(vm, internalFunctionConstructGenerator).code();
}
MacroAssemblerCodeRef<JITThunkPtrTag> JITThunks::ctiStub(VM* vm, ThunkGenerator generator)
{
LockHolder locker(m_lock);
CTIStubMap::AddResult entry = m_ctiStubMap.add(generator, MacroAssemblerCodeRef<JITThunkPtrTag>());
if (entry.isNewEntry) {
// Compilation thread can only retrieve existing entries.
ASSERT(!isCompilationThread());
entry.iterator->value = generator(vm);
}
return entry.iterator->value;
}
MacroAssemblerCodeRef<JITThunkPtrTag> JITThunks::existingCTIStub(ThunkGenerator generator)
{
LockHolder locker(m_lock);
CTIStubMap::iterator entry = m_ctiStubMap.find(generator);
if (entry == m_ctiStubMap.end())
return MacroAssemblerCodeRef<JITThunkPtrTag>();
return entry->value;
}
void JITThunks::finalize(Handle<Unknown> handle, void*)
{
auto* nativeExecutable = static_cast<NativeExecutable*>(handle.get().asCell());
weakRemove(*m_hostFunctionStubMap, std::make_tuple(nativeExecutable->function(), nativeExecutable->constructor(), nativeExecutable->name()), nativeExecutable);
}
NativeExecutable* JITThunks::hostFunctionStub(VM* vm, TaggedNativeFunction function, TaggedNativeFunction constructor, const String& name)
{
return hostFunctionStub(vm, function, constructor, nullptr, NoIntrinsic, nullptr, name);
}
NativeExecutable* JITThunks::hostFunctionStub(VM* vm, TaggedNativeFunction function, TaggedNativeFunction constructor, ThunkGenerator generator, Intrinsic intrinsic, const DOMJIT::Signature* signature, const String& name)
{
ASSERT(!isCompilationThread());
ASSERT(VM::canUseJIT());
if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_tuple(function, constructor, name)))
return nativeExecutable;
RefPtr<JITCode> forCall;
if (generator) {
MacroAssemblerCodeRef<JSEntryPtrTag> entry = generator(vm).retagged<JSEntryPtrTag>();
forCall = adoptRef(new DirectJITCode(entry, entry.code(), JITCode::HostCallThunk));
} else
forCall = adoptRef(new NativeJITCode(MacroAssemblerCodeRef<JSEntryPtrTag>::createSelfManagedCodeRef(ctiNativeCall(vm).retagged<JSEntryPtrTag>()), JITCode::HostCallThunk));
Ref<JITCode> forConstruct = adoptRef(*new NativeJITCode(MacroAssemblerCodeRef<JSEntryPtrTag>::createSelfManagedCodeRef(ctiNativeConstruct(vm).retagged<JSEntryPtrTag>()), JITCode::HostCallThunk));
NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, forCall.releaseNonNull(), function, WTFMove(forConstruct), constructor, intrinsic, signature, name);
weakAdd(*m_hostFunctionStubMap, std::make_tuple(function, constructor, name), Weak<NativeExecutable>(nativeExecutable, this));
return nativeExecutable;
}
NativeExecutable* JITThunks::hostFunctionStub(VM* vm, TaggedNativeFunction function, ThunkGenerator generator, Intrinsic intrinsic, const String& name)
{
return hostFunctionStub(vm, function, callHostFunctionAsConstructor, generator, intrinsic, nullptr, name);
}
void JITThunks::clearHostFunctionStubs()
{
m_hostFunctionStubMap = nullptr;
}
} // namespace JSC
#endif // ENABLE(JIT)