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/*
* Copyright (C) 2012-2016 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 "CodeSpecializationKind.h"
#include "ConstructAbility.h"
#include "ExecutableInfo.h"
#include "ExpressionRangeInfo.h"
#include "Identifier.h"
#include "Intrinsic.h"
#include "JSCell.h"
#include "ParserModes.h"
#include "RegExp.h"
#include "SourceCode.h"
#include "VariableEnvironment.h"
namespace JSC {
class FunctionMetadataNode;
class FunctionExecutable;
class ParserError;
class SourceProvider;
class UnlinkedFunctionCodeBlock;
enum UnlinkedFunctionKind {
UnlinkedNormalFunction,
UnlinkedBuiltinFunction,
};
class UnlinkedFunctionExecutable final : public JSCell {
public:
friend class CodeCache;
friend class VM;
typedef JSCell Base;
static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
static UnlinkedFunctionExecutable* create(VM* vm, const SourceCode& source, FunctionMetadataNode* node, UnlinkedFunctionKind unlinkedFunctionKind, ConstructAbility constructAbility, JSParserScriptMode scriptMode, VariableEnvironment& parentScopeTDZVariables, DerivedContextType derivedContextType, SourceCode&& parentSourceOverride = SourceCode())
{
UnlinkedFunctionExecutable* instance = new (NotNull, allocateCell<UnlinkedFunctionExecutable>(vm->heap))
UnlinkedFunctionExecutable(vm, vm->unlinkedFunctionExecutableStructure.get(), source, WTFMove(parentSourceOverride), node, unlinkedFunctionKind, constructAbility, scriptMode, parentScopeTDZVariables, derivedContextType);
instance->finishCreation(*vm);
return instance;
}
const Identifier& name() const { return m_name; }
const Identifier& ecmaName() const { return m_ecmaName; }
void setEcmaName(const Identifier& name) { m_ecmaName = name; }
const Identifier& inferredName() const { return m_inferredName; }
unsigned parameterCount() const { return m_parameterCount; }; // Excluding 'this'!
SourceParseMode parseMode() const { return static_cast<SourceParseMode>(m_sourceParseMode); };
const SourceCode& classSource() const { return m_classSource; };
void setClassSource(const SourceCode& source) { m_classSource = source; };
bool isInStrictContext() const { return m_isInStrictContext; }
FunctionMode functionMode() const { return static_cast<FunctionMode>(m_functionMode); }
ConstructorKind constructorKind() const { return static_cast<ConstructorKind>(m_constructorKind); }
SuperBinding superBinding() const { return static_cast<SuperBinding>(m_superBinding); }
unsigned lineCount() const { return m_lineCount; }
unsigned linkedStartColumn(unsigned parentStartColumn) const { return m_unlinkedBodyStartColumn + (!m_firstLineOffset ? parentStartColumn : 1); }
unsigned linkedEndColumn(unsigned startColumn) const { return m_unlinkedBodyEndColumn + (!m_lineCount ? startColumn : 1); }
unsigned unlinkedFunctionNameStart() const { return m_unlinkedFunctionNameStart; }
unsigned unlinkedBodyStartColumn() const { return m_unlinkedBodyStartColumn; }
unsigned unlinkedBodyEndColumn() const { return m_unlinkedBodyEndColumn; }
unsigned startOffset() const { return m_startOffset; }
unsigned sourceLength() { return m_sourceLength; }
unsigned parametersStartOffset() const { return m_parametersStartOffset; }
unsigned typeProfilingStartOffset() const { return m_typeProfilingStartOffset; }
unsigned typeProfilingEndOffset() const { return m_typeProfilingEndOffset; }
void setInvalidTypeProfilingOffsets();
UnlinkedFunctionCodeBlock* unlinkedCodeBlockFor(
VM&, const SourceCode&, CodeSpecializationKind, DebuggerMode,
ParserError&, SourceParseMode);
static UnlinkedFunctionExecutable* fromGlobalCode(
const Identifier&, ExecState&, const SourceCode&, JSObject*& exception,
int overrideLineNumber);
JS_EXPORT_PRIVATE FunctionExecutable* link(VM&, const SourceCode& parentSource, std::optional<int> overrideLineNumber = std::nullopt, Intrinsic = NoIntrinsic);
void clearCode()
{
m_unlinkedCodeBlockForCall.clear();
m_unlinkedCodeBlockForConstruct.clear();
}
void recordParse(CodeFeatures features, bool hasCapturedVariables)
{
m_features = features;
m_hasCapturedVariables = hasCapturedVariables;
}
CodeFeatures features() const { return m_features; }
bool hasCapturedVariables() const { return m_hasCapturedVariables; }
static const bool needsDestruction = true;
static void destroy(JSCell*);
bool isBuiltinFunction() const { return m_isBuiltinFunction; }
ConstructAbility constructAbility() const { return static_cast<ConstructAbility>(m_constructAbility); }
JSParserScriptMode scriptMode() const { return static_cast<JSParserScriptMode>(m_scriptMode); }
bool isClassConstructorFunction() const { return constructorKind() != ConstructorKind::None; }
const VariableEnvironment* parentScopeTDZVariables() const { return &m_parentScopeTDZVariables; }
bool isArrowFunction() const { return isArrowFunctionParseMode(parseMode()); }
JSC::DerivedContextType derivedContextType() const {return static_cast<JSC::DerivedContextType>(m_derivedContextType); }
const String& sourceURLDirective() const { return m_sourceURLDirective; }
const String& sourceMappingURLDirective() const { return m_sourceMappingURLDirective; }
void setSourceURLDirective(const String& sourceURL) { m_sourceURLDirective = sourceURL; }
void setSourceMappingURLDirective(const String& sourceMappingURL) { m_sourceMappingURLDirective = sourceMappingURL; }
private:
UnlinkedFunctionExecutable(VM*, Structure*, const SourceCode&, SourceCode&& parentSourceOverride, FunctionMetadataNode*, UnlinkedFunctionKind, ConstructAbility, JSParserScriptMode, VariableEnvironment&, JSC::DerivedContextType);
unsigned m_firstLineOffset;
unsigned m_lineCount;
unsigned m_unlinkedFunctionNameStart;
unsigned m_unlinkedBodyStartColumn;
unsigned m_unlinkedBodyEndColumn;
unsigned m_startOffset;
unsigned m_sourceLength;
unsigned m_parametersStartOffset;
unsigned m_typeProfilingStartOffset;
unsigned m_typeProfilingEndOffset;
unsigned m_parameterCount;
CodeFeatures m_features;
SourceParseMode m_sourceParseMode;
unsigned m_isInStrictContext : 1;
unsigned m_hasCapturedVariables : 1;
unsigned m_isBuiltinFunction : 1;
unsigned m_constructAbility: 1;
unsigned m_constructorKind : 2;
unsigned m_functionMode : 2; // FunctionMode
unsigned m_scriptMode: 1; // JSParserScriptMode
unsigned m_superBinding : 1;
unsigned m_derivedContextType: 2;
WriteBarrier<UnlinkedFunctionCodeBlock> m_unlinkedCodeBlockForCall;
WriteBarrier<UnlinkedFunctionCodeBlock> m_unlinkedCodeBlockForConstruct;
Identifier m_name;
Identifier m_ecmaName;
Identifier m_inferredName;
SourceCode m_parentSourceOverride;
SourceCode m_classSource;
String m_sourceURLDirective;
String m_sourceMappingURLDirective;
VariableEnvironment m_parentScopeTDZVariables;
protected:
static void visitChildren(JSCell*, SlotVisitor&);
public:
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
{
return Structure::create(vm, globalObject, proto, TypeInfo(UnlinkedFunctionExecutableType, StructureFlags), info());
}
DECLARE_EXPORT_INFO;
};
} // namespace JSC
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