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Copy pathJITThunks.cpp
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126 lines (105 loc) · 4.66 KB
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/*
* Copyright (C) 2012, 2013 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 "Executable.h"
#include "JIT.h"
#include "VM.h"
#include "JSCInlines.h"
namespace JSC {
JITThunks::JITThunks()
: m_hostFunctionStubMap(adoptPtr(new HostFunctionStubMap))
{
}
JITThunks::~JITThunks()
{
}
MacroAssemblerCodePtr JITThunks::ctiNativeCall(VM* vm)
{
if (!vm->canUseJIT())
return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_call_trampoline);
return ctiStub(vm, nativeCallGenerator).code();
}
MacroAssemblerCodePtr JITThunks::ctiNativeConstruct(VM* vm)
{
if (!vm->canUseJIT())
return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_construct_trampoline);
return ctiStub(vm, nativeConstructGenerator).code();
}
MacroAssemblerCodePtr JITThunks::ctiNativeTailCall(VM* vm)
{
ASSERT(vm->canUseJIT());
return ctiStub(vm, nativeTailCallGenerator).code();
}
MacroAssemblerCodeRef JITThunks::ctiStub(VM* vm, ThunkGenerator generator)
{
Locker locker(m_lock);
CTIStubMap::AddResult entry = m_ctiStubMap.add(generator, MacroAssemblerCodeRef());
if (entry.isNewEntry) {
// Compilation thread can only retrieve existing entries.
ASSERT(!isCompilationThread());
entry.iterator->value = generator(vm);
}
return entry.iterator->value;
}
NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, NativeFunction constructor)
{
ASSERT(!isCompilationThread());
if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(function, constructor)))
return nativeExecutable;
NativeExecutable* nativeExecutable = NativeExecutable::create(
*vm,
adoptRef(new NativeJITCode(JIT::compileCTINativeCall(vm, function), JITCode::HostCallThunk)),
function,
adoptRef(new NativeJITCode(MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), JITCode::HostCallThunk)),
constructor, NoIntrinsic);
weakAdd(*m_hostFunctionStubMap, std::make_pair(function, constructor), Weak<NativeExecutable>(nativeExecutable));
return nativeExecutable;
}
NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, ThunkGenerator generator, Intrinsic intrinsic)
{
ASSERT(!isCompilationThread());
if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(function, &callHostFunctionAsConstructor)))
return nativeExecutable;
RefPtr<JITCode> forCall;
if (generator) {
if (vm->canUseJIT()) {
MacroAssemblerCodeRef entry = generator(vm);
forCall = adoptRef(new DirectJITCode(entry, entry.code(), JITCode::HostCallThunk));
}
} else
forCall = adoptRef(new NativeJITCode(JIT::compileCTINativeCall(vm, function), JITCode::HostCallThunk));
RefPtr<JITCode> forConstruct = adoptRef(new NativeJITCode(MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), JITCode::HostCallThunk));
NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, forCall, function, forConstruct, callHostFunctionAsConstructor, intrinsic);
weakAdd(*m_hostFunctionStubMap, std::make_pair(function, &callHostFunctionAsConstructor), Weak<NativeExecutable>(nativeExecutable));
return nativeExecutable;
}
void JITThunks::clearHostFunctionStubs()
{
m_hostFunctionStubMap.clear();
}
} // namespace JSC
#endif // ENABLE(JIT)