mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
99 lines
3.9 KiB
C++
99 lines
3.9 KiB
C++
/*
|
|
* Copyright (C) 2015-2018 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#if ENABLE(FTL_JIT)
|
|
|
|
#include "CCallHelpers.h"
|
|
#include "CodeBlock.h"
|
|
#include "CodeLocation.h"
|
|
#include "GPRInfo.h"
|
|
#include "MacroAssemblerCodeRef.h"
|
|
#include "RegisterSet.h"
|
|
#include "ScratchRegisterAllocator.h"
|
|
#include <wtf/SharedTask.h>
|
|
|
|
namespace JSC { namespace FTL {
|
|
|
|
// A LazySlowPath is an object that represents a piece of code that is part of FTL generated code
|
|
// that will be generated lazily. It holds all of the important information needed to generate that
|
|
// code, such as where to link jumps to and which registers are in use. It also has a reference to a
|
|
// SharedTask that will do the actual code generation. That SharedTask may have additional data, like
|
|
// which registers hold the inputs or outputs.
|
|
class LazySlowPath {
|
|
WTF_MAKE_NONCOPYABLE(LazySlowPath);
|
|
WTF_MAKE_FAST_ALLOCATED;
|
|
public:
|
|
struct GenerationParams {
|
|
// Extra parameters to the GeneratorFunction are made into fields of this struct, so that if
|
|
// we add new parameters, we don't have to change all of the users.
|
|
CCallHelpers::JumpList doneJumps;
|
|
CCallHelpers::JumpList* exceptionJumps;
|
|
LazySlowPath* lazySlowPath;
|
|
};
|
|
|
|
typedef void GeneratorFunction(CCallHelpers&, GenerationParams&);
|
|
typedef SharedTask<GeneratorFunction> Generator;
|
|
|
|
template<typename Functor>
|
|
static Ref<Generator> createGenerator(const Functor& functor)
|
|
{
|
|
return createSharedTask<GeneratorFunction>(functor);
|
|
}
|
|
|
|
LazySlowPath() = default;
|
|
|
|
~LazySlowPath();
|
|
|
|
void initialize(
|
|
CodeLocationJump<JSInternalPtrTag> patchableJump, CodeLocationLabel<JSInternalPtrTag> done,
|
|
CodeLocationLabel<ExceptionHandlerPtrTag> exceptionTarget, const RegisterSet& usedRegisters,
|
|
CallSiteIndex, RefPtr<Generator>
|
|
);
|
|
|
|
CodeLocationJump<JSInternalPtrTag> patchableJump() const { return m_patchableJump; }
|
|
CodeLocationLabel<JSInternalPtrTag> done() const { return m_done; }
|
|
const RegisterSet& usedRegisters() const { return m_usedRegisters; }
|
|
CallSiteIndex callSiteIndex() const { return m_callSiteIndex; }
|
|
|
|
void generate(CodeBlock*);
|
|
|
|
MacroAssemblerCodeRef<JITStubRoutinePtrTag> stub() const { return m_stub; }
|
|
|
|
private:
|
|
CodeLocationJump<JSInternalPtrTag> m_patchableJump;
|
|
CodeLocationLabel<JSInternalPtrTag> m_done;
|
|
CodeLocationLabel<ExceptionHandlerPtrTag> m_exceptionTarget;
|
|
RegisterSet m_usedRegisters;
|
|
CallSiteIndex m_callSiteIndex;
|
|
MacroAssemblerCodeRef<JITStubRoutinePtrTag> m_stub;
|
|
RefPtr<Generator> m_generator;
|
|
};
|
|
|
|
} } // namespace JSC::FTL
|
|
|
|
#endif // ENABLE(FTL_JIT)
|