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/*
* Copyright (C) 2009-2019 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
#include "ExecutableBase.h"
#include "ParserModes.h"
#include "ProfilerJettisonReason.h"
namespace JSC {
class JSArray;
class JSTemplateObjectDescriptor;
class IsoCellSet;
class ScriptExecutable : public ExecutableBase {
public:
typedef ExecutableBase Base;
static constexpr unsigned StructureFlags = Base::StructureFlags;
static void destroy(JSCell*);
using TemplateObjectMap = UncheckedKeyHashMap<uint64_t, WriteBarrier<JSArray>, WTF::IntHash<uint64_t>, WTF::UnsignedWithZeroKeyHashTraits<uint64_t>>;
CodeBlockHash hashFor(CodeSpecializationKind) const;
const SourceCode& source() const { return m_source; }
SourceID sourceID() const { return m_source.providerID(); }
const SourceOrigin& sourceOrigin() const { return m_source.provider()->sourceOrigin(); }
// This is NOT the path that should be used for computing relative paths from a script. Use SourceOrigin's URL for that, the values may or may not be the same... This should only be used for `error.sourceURL` and stack traces.
const String& sourceURL() const { return m_source.provider()->sourceURL(); }
const String& sourceURLStripped() const { return m_source.provider()->sourceURLStripped(); }
const String& preRedirectURL() const { return m_source.provider()->preRedirectURL(); }
int firstLine() const { return m_source.firstLine().oneBasedInt(); }
JS_EXPORT_PRIVATE int lastLine() const;
unsigned startColumn() const { return m_source.startColumn().oneBasedInt(); }
JS_EXPORT_PRIVATE unsigned endColumn() const;
std::optional<int> overrideLineNumber(VM&) const;
unsigned typeProfilingStartOffset() const;
unsigned typeProfilingEndOffset() const;
bool usesArguments() const { return m_features & ArgumentsFeature; }
bool isArrowFunctionContext() const { return m_isArrowFunctionContext; }
DerivedContextType derivedContextType() const { return static_cast<DerivedContextType>(m_derivedContextType); }
EvalContextType evalContextType() const { return static_cast<EvalContextType>(m_evalContextType); }
bool isInStrictContext() const { return m_lexicallyScopedFeatures & StrictModeLexicallyScopedFeature; }
bool usesNonSimpleParameterList() const { return m_features & NonSimpleParameterListFeature; }
void setNeverInline(bool value) { m_neverInline = value; }
void setNeverOptimize(bool value) { m_neverOptimize = value; }
void setNeverFTLOptimize(bool value) { m_neverFTLOptimize = value; }
void setDidTryToEnterInLoop(bool value) { m_didTryToEnterInLoop = value; }
void setCanUseOSRExitFuzzing(bool value) { m_canUseOSRExitFuzzing = value; }
bool neverInline() const { return m_neverInline; }
bool neverOptimize() const { return m_neverOptimize; }
bool neverFTLOptimize() const { return m_neverFTLOptimize; }
bool didTryToEnterInLoop() const { return m_didTryToEnterInLoop; }
bool isInliningCandidate() const { return !neverInline(); }
bool isOkToOptimize() const { return !neverOptimize(); }
bool canUseOSRExitFuzzing() const { return m_canUseOSRExitFuzzing; }
bool isInsideOrdinaryFunction() const { return m_isInsideOrdinaryFunction; }
bool* addressOfDidTryToEnterInLoop() { return &m_didTryToEnterInLoop; }
CodeFeatures features() const { return m_features; }
LexicallyScopedFeatures lexicallyScopedFeatures() { return static_cast<LexicallyScopedFeatures>(m_lexicallyScopedFeatures); }
void setTaintedByWithScope() { m_lexicallyScopedFeatures |= TaintedByWithScopeLexicallyScopedFeature; }
DECLARE_EXPORT_INFO;
void recordParse(CodeFeatures, LexicallyScopedFeatures, bool hasCapturedVariables, int lastLine, unsigned endColumn);
void installCode(CodeBlock*);
void installCode(VM&, CodeBlock*, CodeType, CodeSpecializationKind, Profiler::JettisonReason);
CodeBlock* newCodeBlockFor(CodeSpecializationKind, JSFunction*, JSScope*);
CodeBlock* newReplacementCodeBlockFor(CodeSpecializationKind);
void clearCode(IsoCellSet&);
Intrinsic intrinsic() const
{
return m_intrinsic;
}
bool hasJITCodeForCall() const
{
return m_jitCodeForCall;
}
bool hasJITCodeForConstruct() const
{
return m_jitCodeForConstruct;
}
// This function has an interesting GC story. Callers of this function are asking us to create a CodeBlock
// that is not jettisoned before this function returns. Callers are essentially asking for a strong reference
// to the CodeBlock. Because the Executable may be allocating the CodeBlock, we require callers to pass in
// their CodeBlock*& reference because it's safe for CodeBlock to be jettisoned if Executable is the only thing
// to point to it. This forces callers to have a CodeBlock* in a register or on the stack that will be marked
// by conservative GC if a GC happens after we create the CodeBlock.
template <typename ExecutableType>
void prepareForExecution(VM&, JSFunction*, JSScope*, CodeSpecializationKind, CodeBlock*&);
ScriptExecutable* topLevelExecutable();
JSArray* createTemplateObject(JSGlobalObject*, JSTemplateObjectDescriptor*);
private:
friend class ExecutableBase;
void prepareForExecutionImpl(VM&, JSFunction*, JSScope*, CodeSpecializationKind, CodeBlock*&);
bool hasClearableCode() const;
TemplateObjectMap& ensureTemplateObjectMap(VM&);
protected:
ScriptExecutable(Structure*, VM&, const SourceCode&, LexicallyScopedFeatures, DerivedContextType, bool isInArrowFunctionContext, bool isInsideOrdinaryFunction, EvalContextType, Intrinsic);
void recordParse(CodeFeatures features, LexicallyScopedFeatures lexicallyScopedFeatures, bool hasCapturedVariables)
{
m_features = features;
m_lexicallyScopedFeatures = lexicallyScopedFeatures;
m_hasCapturedVariables = hasCapturedVariables;
}
static TemplateObjectMap& ensureTemplateObjectMapImpl(std::unique_ptr<TemplateObjectMap>& dest);
template<typename Visitor>
static void runConstraint(const ConcurrentJSLocker&, Visitor&, CodeBlock*);
template<typename Visitor>
static void visitCodeBlockEdge(Visitor&, CodeBlock*);
void finalizeCodeBlockEdge(VM&, WriteBarrier<CodeBlock>&);
SourceCode m_source;
Intrinsic m_intrinsic { NoIntrinsic };
bool m_didTryToEnterInLoop { false };
CodeFeatures m_features;
LexicallyScopedFeatures m_lexicallyScopedFeatures : bitWidthOfLexicallyScopedFeatures;
OptionSet<CodeGenerationMode> m_codeGenerationModeForGeneratorBody;
bool m_hasCapturedVariables : 1;
bool m_neverInline : 1;
bool m_neverOptimize : 1;
bool m_neverFTLOptimize : 1;
bool m_isArrowFunctionContext : 1;
bool m_canUseOSRExitFuzzing : 1;
bool m_codeForGeneratorBodyWasGenerated : 1;
bool m_isInsideOrdinaryFunction : 1;
unsigned m_derivedContextType : 2; // DerivedContextType
unsigned m_evalContextType : 2; // EvalContextType
};
} // namespace JSC
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