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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2006, 2007, 2008, 2009 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.
*
*/
#ifndef JSFunction_h
#define JSFunction_h
#include "InternalFunction.h"
#include "JSScope.h"
namespace JSC {
class ExecutableBase;
class FunctionExecutable;
class FunctionPrototype;
class JSActivation;
class JSGlobalObject;
class LLIntOffsetsExtractor;
class NativeExecutable;
class SourceCode;
namespace DFG {
class SpeculativeJIT;
class JITCompiler;
}
JS_EXPORT_PRIVATE EncodedJSValue JSC_HOST_CALL callHostFunctionAsConstructor(ExecState*);
JS_EXPORT_PRIVATE String getCalculatedDisplayName(CallFrame*, JSObject*);
class JSFunction : public JSNonFinalObject {
friend class JIT;
friend class DFG::SpeculativeJIT;
friend class DFG::JITCompiler;
friend class JSGlobalData;
public:
typedef JSNonFinalObject Base;
JS_EXPORT_PRIVATE static JSFunction* create(ExecState*, JSGlobalObject*, int length, const String& name, NativeFunction, Intrinsic = NoIntrinsic, NativeFunction nativeConstructor = callHostFunctionAsConstructor);
static JSFunction* create(ExecState* exec, FunctionExecutable* executable, JSScope* scope)
{
JSFunction* function = new (NotNull, allocateCell<JSFunction>(*exec->heap())) JSFunction(exec, executable, scope);
ASSERT(function->structure()->globalObject());
function->finishCreation(exec, executable, scope);
return function;
}
JS_EXPORT_PRIVATE const String& name(ExecState*);
JS_EXPORT_PRIVATE const String displayName(ExecState*);
const String calculatedDisplayName(ExecState*);
JSScope* scope()
{
ASSERT(!isHostFunctionNonInline());
return m_scope.get();
}
// This method may be called for host functins, in which case it
// will return an arbitrary value. This should only be used for
// optimized paths in which the return value does not matter for
// host functions, and checking whether the function is a host
// function is deemed too expensive.
JSScope* scopeUnchecked()
{
return m_scope.get();
}
void setScope(JSGlobalData& globalData, JSScope* scope)
{
ASSERT(!isHostFunctionNonInline());
m_scope.set(globalData, this, scope);
}
ExecutableBase* executable() const { return m_executable.get(); }
// To call either of these methods include Executable.h
inline bool isHostFunction() const;
FunctionExecutable* jsExecutable() const;
JS_EXPORT_PRIVATE const SourceCode* sourceCode() const;
static JS_EXPORTDATA const ClassInfo s_info;
static Structure* createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue prototype)
{
ASSERT(globalObject);
return Structure::create(globalData, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), &s_info);
}
NativeFunction nativeFunction();
NativeFunction nativeConstructor();
static ConstructType getConstructData(JSCell*, ConstructData&);
static CallType getCallData(JSCell*, CallData&);
static inline size_t offsetOfScopeChain()
{
return OBJECT_OFFSETOF(JSFunction, m_scope);
}
static inline size_t offsetOfExecutable()
{
return OBJECT_OFFSETOF(JSFunction, m_executable);
}
Structure* cachedInheritorID(ExecState* exec)
{
if (UNLIKELY(!m_cachedInheritorID))
return cacheInheritorID(exec);
return m_cachedInheritorID.get();
}
static size_t offsetOfCachedInheritorID()
{
return OBJECT_OFFSETOF(JSFunction, m_cachedInheritorID);
}
protected:
const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesVisitChildren | OverridesGetPropertyNames | JSObject::StructureFlags;
JS_EXPORT_PRIVATE JSFunction(ExecState*, JSGlobalObject*, Structure*);
JSFunction(ExecState*, FunctionExecutable*, JSScope*);
void finishCreation(ExecState*, NativeExecutable*, int length, const String& name);
void finishCreation(ExecState*, FunctionExecutable*, JSScope*);
Structure* cacheInheritorID(ExecState*);
static bool getOwnPropertySlot(JSCell*, ExecState*, PropertyName, PropertySlot&);
static bool getOwnPropertyDescriptor(JSObject*, ExecState*, PropertyName, PropertyDescriptor&);
static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode = ExcludeDontEnumProperties);
static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, PropertyDescriptor&, bool shouldThrow);
static void put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
static bool deleteProperty(JSCell*, ExecState*, PropertyName);
static void visitChildren(JSCell*, SlotVisitor&);
private:
friend class LLIntOffsetsExtractor;
JS_EXPORT_PRIVATE bool isHostFunctionNonInline() const;
static JSValue argumentsGetter(ExecState*, JSValue, PropertyName);
static JSValue callerGetter(ExecState*, JSValue, PropertyName);
static JSValue lengthGetter(ExecState*, JSValue, PropertyName);
WriteBarrier<ExecutableBase> m_executable;
WriteBarrier<JSScope> m_scope;
WriteBarrier<Structure> m_cachedInheritorID;
};
inline bool JSValue::isFunction() const
{
return isCell() && (asCell()->inherits(&JSFunction::s_info) || asCell()->inherits(&InternalFunction::s_info));
}
} // namespace JSC
#endif // JSFunction_h
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