Bug 104242 – Attribute ReadOnly is not applied to global object's properties set via JSObjectSetProperty

• Status: UNCONFIRMED
• Component: JavaScriptCore

[Hojong Han]

Source/JavaScriptCore/API/JSObjectRef.cpp
void JSObjectSetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value, JSPropertyAttributes attributes, JSValueRef* exception)
{
    ... skip ...
        jsObject->methodTable()->putDirectVirtual(jsObject, exec, name, jsValue, attributes);
    ... skip ...
}

Source/JavaScriptCore/runtime/JSGlobalObject.cpp
void JSGlobalObject::putDirectVirtual(JSObject* object, ExecState* exec, PropertyName propertyName, JSValue value, unsigned attributes)
{
    ... skip ...
    JSValue valueBefore = thisObject->getDirect(exec->globalData(), propertyName);
    PutPropertySlot slot;
    Base::put(thisObject, exec, propertyName, value, slot);
    if (!valueBefore) {
        JSValue valueAfter = thisObject->getDirect(exec->globalData(), propertyName);
        if (valueAfter)
            JSObject::putDirectVirtual(thisObject, exec, propertyName, valueAfter, attributes);
    }
}

putDirectVirtual called in JSObjectSetProperty calls put and then putDirectVirtual.
Property is put without any attribute in function "put", but stil attribute is not updated in function "putDirectVirtual".
Isn't it a bug?

Plz somebody let me know the reason why the routine is written like above.