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DFGCommonData.h
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148 lines (118 loc) · 5.18 KB
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/*
* Copyright (C) 2013-2018 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(DFG_JIT)
#include "CodeBlockJettisoningWatchpoint.h"
#include "DFGAdaptiveInferredPropertyValueWatchpoint.h"
#include "DFGAdaptiveStructureWatchpoint.h"
#include "DFGCodeOriginPool.h"
#include "DFGJumpReplacement.h"
#include "DFGOSREntry.h"
#include "InlineCallFrameSet.h"
#include "JSCast.h"
#include "ProfilerCompilation.h"
#include "RecordedStatuses.h"
#include <wtf/Bag.h>
#include <wtf/Noncopyable.h>
namespace JSC {
class CodeBlock;
class Identifier;
class TrackedReferences;
namespace DFG {
struct Node;
class Plan;
// CommonData holds the set of data that both DFG and FTL code blocks need to know
// about themselves.
struct WeakReferenceTransition {
WeakReferenceTransition() { }
WeakReferenceTransition(VM& vm, JSCell* owner, JSCell* codeOrigin, JSCell* from, JSCell* to)
: m_from(vm, owner, from)
, m_to(vm, owner, to)
{
if (!!codeOrigin)
m_codeOrigin.set(vm, owner, codeOrigin);
}
WriteBarrier<JSCell> m_codeOrigin;
WriteBarrier<JSCell> m_from;
WriteBarrier<JSCell> m_to;
};
class CommonData {
WTF_MAKE_NONCOPYABLE(CommonData);
public:
CommonData()
: codeOrigins(CodeOriginPool::create())
{ }
~CommonData();
void notifyCompilingStructureTransition(Plan&, CodeBlock*, Node*);
void shrinkToFit();
bool invalidate(); // Returns true if we did invalidate, or false if the code block was already invalidated.
bool hasInstalledVMTrapsBreakpoints() const { return isStillValid && hasVMTrapsBreakpointsInstalled; }
void installVMTrapBreakpoints(CodeBlock* owner);
bool isVMTrapBreakpoint(void* address);
CatchEntrypointData* catchOSREntryDataForBytecodeIndex(BytecodeIndex bytecodeIndex)
{
return tryBinarySearch<CatchEntrypointData, BytecodeIndex>(
catchEntrypoints, catchEntrypoints.size(), bytecodeIndex,
[] (const CatchEntrypointData* item) { return item->bytecodeIndex; });
}
void appendCatchEntrypoint(BytecodeIndex bytecodeIndex, MacroAssemblerCodePtr<ExceptionHandlerPtrTag> machineCode, Vector<FlushFormat>&& argumentFormats)
{
catchEntrypoints.append(CatchEntrypointData { machineCode, WTFMove(argumentFormats), bytecodeIndex });
}
void finalizeCatchEntrypoints();
unsigned requiredRegisterCountForExecutionAndExit() const
{
return std::max(frameRegisterCount, requiredRegisterCountForExit);
}
void validateReferences(const TrackedReferences&);
static ptrdiff_t frameRegisterCountOffset() { return OBJECT_OFFSETOF(CommonData, frameRegisterCount); }
void clearWatchpoints();
RefPtr<InlineCallFrameSet> inlineCallFrames;
Ref<CodeOriginPool> codeOrigins;
Vector<Identifier> dfgIdentifiers;
Vector<WeakReferenceTransition> transitions;
Vector<WriteBarrier<JSCell>> weakReferences;
Vector<StructureID> weakStructureReferences;
Vector<CatchEntrypointData> catchEntrypoints;
Bag<CodeBlockJettisoningWatchpoint> watchpoints;
Bag<AdaptiveStructureWatchpoint> adaptiveStructureWatchpoints;
Bag<AdaptiveInferredPropertyValueWatchpoint> adaptiveInferredPropertyValueWatchpoints;
RecordedStatuses recordedStatuses;
Vector<JumpReplacement> jumpReplacements;
ScratchBuffer* catchOSREntryBuffer;
RefPtr<Profiler::Compilation> compilation;
bool livenessHasBeenProved; // Initialized and used on every GC.
bool allTransitionsHaveBeenMarked; // Initialized and used on every GC.
bool isStillValid { true };
bool hasVMTrapsBreakpointsInstalled { false };
#if USE(JSVALUE32_64)
std::unique_ptr<Bag<double>> doubleConstants;
#endif
unsigned frameRegisterCount { std::numeric_limits<unsigned>::max() };
unsigned requiredRegisterCountForExit { std::numeric_limits<unsigned>::max() };
};
CodeBlock* codeBlockForVMTrapPC(void* pc);
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)