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/*
* Copyright (C) 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 "CompilationResult.h"
#include "JITCode.h"
#include "JITCompilationKey.h"
#include "JITCompilationMode.h"
#include "JITPlanStage.h"
#include "ReleaseHeapAccessScope.h"
#include <wtf/MonotonicTime.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace JSC {
class AbstractSlotVisitor;
class CodeBlock;
class JITWorklistThread;
class VM;
class JITPlan : public ThreadSafeRefCounted<JITPlan> {
protected:
JITPlan(JITCompilationMode, CodeBlock*);
public:
virtual ~JITPlan();
VM* vm() const { return m_vm; }
CodeBlock* codeBlock() const { return m_codeBlock; }
JITWorklistThread* thread() const { return m_thread; }
JITCompilationMode mode() const { return m_mode; }
JITPlanStage stage() const { return m_stage; }
bool isDFG() const { return ::JSC::isDFG(m_mode); }
bool isFTL() const { return ::JSC::isFTL(m_mode); }
bool isUnlinked() const { return ::JSC::isUnlinked(m_mode); }
enum class Tier { Baseline = 0, DFG = 1, FTL = 2, Count = 3 };
Tier tier() const;
JITType jitType() const
{
switch (tier()) {
case Tier::Baseline:
return JITType::BaselineJIT;
case Tier::DFG:
return JITType::DFGJIT;
case Tier::FTL:
return JITType::FTLJIT;
default:
return JITType::None;
}
}
JITCompilationKey key();
void compileInThread(JITWorklistThread*);
virtual size_t codeSize() const = 0;
virtual CompilationResult finalize() = 0;
virtual void finalizeInGC() { }
void notifyCompiling();
virtual void notifyReady();
virtual void cancel();
virtual bool isKnownToBeLiveAfterGC();
virtual bool isKnownToBeLiveDuringGC(AbstractSlotVisitor&);
virtual bool iterateCodeBlocksForGC(AbstractSlotVisitor&, NOESCAPE const Function<void(CodeBlock*)>&);
virtual bool checkLivenessAndVisitChildren(AbstractSlotVisitor&);
bool isInSafepoint() const;
bool safepointKeepsDependenciesLive() const;
template<typename Functor>
void addMainThreadFinalizationTask(const Functor& functor)
{
m_mainThreadFinalizationTasks.append(createSharedTask<void()>(functor));
}
void runMainThreadFinalizationTasks();
enum class SignpostDetail { None, Canceled };
CString signpostMessage();
void beginSignpost()
{
if (Options::useCompilerSignpost()) [[unlikely]]
beginSignpostImpl();
}
void endSignpost(SignpostDetail detail = SignpostDetail::None)
{
if (Options::useCompilerSignpost()) [[unlikely]]
endSignpostImpl(detail);
}
protected:
bool computeCompileTimes() const;
bool reportCompileTimes() const;
enum CompilationPath { FailPath, BaselinePath, DFGPath, FTLPath, CancelPath };
virtual CompilationPath compileInThreadImpl() = 0;
void beginSignpostImpl();
void endSignpostImpl(SignpostDetail);
JITPlanStage m_stage { JITPlanStage::Preparing };
JITCompilationMode m_mode;
MonotonicTime m_timeBeforeFTL;
VM* m_vm;
CodeBlock* m_codeBlock;
JITWorklistThread* m_thread { nullptr };
Vector<RefPtr<SharedTask<void()>>> m_mainThreadFinalizationTasks;
CString m_signpostMessage; // Non-null iff Options::useCompilerSignpost()
};
} // namespace JSC
#endif // ENABLE(JIT)
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