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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2006-2009, 2015-2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
* Copyright (C) 2007 Maks Orlovich
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "FunctionRareData.h"
#include "InternalFunction.h"
#include "JSCallee.h"
#include "JSScope.h"
#include "Watchpoint.h"
namespace JSC {
class ExecutableBase;
class FunctionExecutable;
class FunctionPrototype;
class JSLexicalEnvironment;
class JSGlobalObject;
class LLIntOffsetsExtractor;
class NativeExecutable;
class SourceCode;
class InternalFunction;
namespace DFG {
class SpeculativeJIT;
class JITCompiler;
}
namespace DOMJIT {
class Signature;
}
JS_EXPORT_PRIVATE EncodedJSValue JSC_HOST_CALL callHostFunctionAsConstructor(ExecState*);
JS_EXPORT_PRIVATE String getCalculatedDisplayName(VM&, JSObject*);
class JSFunction : public JSCallee {
friend class JIT;
friend class DFG::SpeculativeJIT;
friend class DFG::JITCompiler;
friend class VM;
friend class InternalFunction;
public:
typedef JSCallee Base;
const static unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetPropertyNames;
static size_t allocationSize(size_t inlineCapacity)
{
ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
return sizeof(JSFunction);
}
JS_EXPORT_PRIVATE static JSFunction* create(VM&, JSGlobalObject*, int length, const String& name, NativeFunction, Intrinsic = NoIntrinsic, NativeFunction nativeConstructor = callHostFunctionAsConstructor, const DOMJIT::Signature* = nullptr);
static JSFunction* createWithInvalidatedReallocationWatchpoint(VM&, FunctionExecutable*, JSScope*);
static JSFunction* create(VM&, FunctionExecutable*, JSScope*);
static JSFunction* create(VM&, FunctionExecutable*, JSScope*, Structure*);
JS_EXPORT_PRIVATE static JSFunction* createBuiltinFunction(VM&, FunctionExecutable*, JSGlobalObject*);
static JSFunction* createBuiltinFunction(VM&, FunctionExecutable*, JSGlobalObject*, const String& name);
JS_EXPORT_PRIVATE String name(VM&);
JS_EXPORT_PRIVATE String displayName(VM&);
const String calculatedDisplayName(VM&);
ExecutableBase* executable() const { return m_executable.get(); }
// To call any of these methods include JSFunctionInlines.h
bool isHostFunction() const;
FunctionExecutable* jsExecutable() const;
Intrinsic intrinsic() const;
JS_EXPORT_PRIVATE const SourceCode* sourceCode() const;
DECLARE_EXPORT_INFO;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
ASSERT(globalObject);
return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
}
NativeFunction nativeFunction();
NativeFunction nativeConstructor();
static ConstructType getConstructData(JSCell*, ConstructData&);
static CallType getCallData(JSCell*, CallData&);
static inline ptrdiff_t offsetOfExecutable()
{
return OBJECT_OFFSETOF(JSFunction, m_executable);
}
static inline ptrdiff_t offsetOfRareData()
{
return OBJECT_OFFSETOF(JSFunction, m_rareData);
}
FunctionRareData* rareData(VM& vm)
{
if (UNLIKELY(!m_rareData))
return allocateRareData(vm);
return m_rareData.get();
}
FunctionRareData* rareData(ExecState* exec, unsigned inlineCapacity)
{
if (UNLIKELY(!m_rareData))
return allocateAndInitializeRareData(exec, inlineCapacity);
if (UNLIKELY(!m_rareData->isObjectAllocationProfileInitialized()))
return initializeRareData(exec, inlineCapacity);
return m_rareData.get();
}
FunctionRareData* rareData()
{
FunctionRareData* rareData = m_rareData.get();
// The JS thread may be concurrently creating the rare data
// If we see it, we want to ensure it has been properly created
WTF::loadLoadFence();
return rareData;
}
bool isHostOrBuiltinFunction() const;
bool isBuiltinFunction() const;
JS_EXPORT_PRIVATE bool isHostFunctionNonInline() const;
bool isClassConstructorFunction() const;
void setFunctionName(ExecState*, JSValue name);
protected:
JS_EXPORT_PRIVATE JSFunction(VM&, JSGlobalObject*, Structure*);
JSFunction(VM&, FunctionExecutable*, JSScope*, Structure*);
void finishCreation(VM&, NativeExecutable*, int length, const String& name);
using Base::finishCreation;
FunctionRareData* allocateRareData(VM&);
FunctionRareData* allocateAndInitializeRareData(ExecState*, size_t inlineCapacity);
FunctionRareData* initializeRareData(ExecState*, size_t inlineCapacity);
static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
static void getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode = EnumerationMode());
static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
static bool deleteProperty(JSCell*, ExecState*, PropertyName);
static void visitChildren(JSCell*, SlotVisitor&);
private:
static JSFunction* createImpl(VM& vm, FunctionExecutable* executable, JSScope* scope, Structure* structure)
{
JSFunction* function = new (NotNull, allocateCell<JSFunction>(vm.heap)) JSFunction(vm, executable, scope, structure);
ASSERT(function->structure()->globalObject());
function->finishCreation(vm);
return function;
}
bool hasReifiedLength() const;
bool hasReifiedName() const;
void reifyLength(VM&);
void reifyName(VM&, ExecState*);
void reifyName(VM&, ExecState*, String name);
enum class LazyPropertyType { NotLazyProperty, IsLazyProperty };
LazyPropertyType reifyLazyPropertyIfNeeded(VM&, ExecState*, PropertyName);
LazyPropertyType reifyBoundNameIfNeeded(VM&, ExecState*, PropertyName);
friend class LLIntOffsetsExtractor;
static EncodedJSValue argumentsGetter(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue callerGetter(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue lengthGetter(ExecState*, EncodedJSValue, PropertyName);
static EncodedJSValue nameGetter(ExecState*, EncodedJSValue, PropertyName);
WriteBarrier<ExecutableBase> m_executable;
WriteBarrier<FunctionRareData> m_rareData;
};
} // namespace JSC
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