RESOLVED FIXED 70960
De-virtualize JSObject 
https://bugs.webkit.org/show_bug.cgi?id=70960
Summary De-virtualize JSObject
Mark Hahnenberg
Reported 2011-10-26 13:16:38 PDT
In order to eliminate the vtable pointer in most (if not all) of the JSObjects in the runtime we first need to eliminate those virtual methods rooted in JSObject. This will be the tracking bug for this effort. As of now, the functions that require de-virtualizing in JSObject are: virtual UString className() const; virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); virtual void putWithAttributes(JSGlobalData*, const Identifier& propertyName, JSValue value, unsigned attributes, bool checkReadOnly, PutPropertySlot& slot); virtual void putWithAttributes(JSGlobalData*, const Identifier& propertyName, JSValue value, unsigned attributes); virtual void putWithAttributes(JSGlobalData*, unsigned propertyName, JSValue value, unsigned attributes); virtual void putWithAttributes(ExecState*, const Identifier& propertyName, JSValue value, unsigned attributes, bool checkReadOnly, PutPropertySlot& slot); virtual void putWithAttributes(ExecState*, const Identifier& propertyName, JSValue value, unsigned attributes); virtual void putWithAttributes(ExecState*, unsigned propertyName, JSValue value, unsigned attributes); virtual JSValue defaultValue(ExecState*, PreferredPrimitiveType) const; virtual bool hasInstance(ExecState*, JSValue, JSValue prototypeProperty); virtual void getPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); virtual JSObject* unwrappedObject(); virtual void defineGetter(ExecState*, const Identifier& propertyName, JSObject* getterFunction, unsigned attributes = 0); virtual void defineSetter(ExecState*, const Identifier& propertyName, JSObject* setterFunction, unsigned attributes = 0); virtual JSValue lookupGetter(ExecState*, const Identifier& propertyName); virtual JSValue lookupSetter(ExecState*, const Identifier& propertyName); virtual bool defineOwnProperty(ExecState*, const Identifier& propertyName, PropertyDescriptor&, bool shouldThrow); virtual bool isGlobalObject() const; virtual bool isVariableObject() const; virtual bool isActivationObject() const; virtual bool isErrorInstance() const;
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Mark Hahnenberg
Comment 1 2011-11-09 14:28:52 PST
All of the virtual functions in JSObject except for the artificial vtableAnchor have been removed. Closing bug.
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