static RawObject
CloneObject(JSContext *cx, HandleObject srcObj, CloneMemory &clonedObjects)
{
    CloneMemory::AddPtr p = clonedObjects.lookupForAdd(srcObj.get());
    if (p)
        return p->value;
    RootedObject clone(cx);
    if (srcObj->isFunction()) {
        RootedFunction fun(cx, srcObj->toFunction());
        clone = CloneFunctionObject(cx, fun, cx->global(), fun->getAllocKind());
    } else if (srcObj->isRegExp()) {
        RegExpObject &reobj = srcObj->asRegExp();
        RootedAtom source(cx, reobj.getSource());
        clone = RegExpObject::createNoStatics(cx, source, reobj.getFlags(), NULL);
    } else if (srcObj->isDate()) {
        clone = JS_NewDateObjectMsec(cx, srcObj->getDateUTCTime().toNumber());
    } else if (srcObj->isBoolean()) {
        clone = BooleanObject::create(cx, srcObj->asBoolean().unbox());
    } else if (srcObj->isNumber()) {
        clone = NumberObject::create(cx, srcObj->asNumber().unbox());
    } else if (srcObj->isString()) {
        Rooted<JSStableString*> str(cx, srcObj->asString().unbox()->ensureStable(cx));
        if (!str)
            return NULL;
        str = js_NewStringCopyN(cx, str->chars().get(), str->length())->ensureStable(cx);
        if (!str)
            return NULL;
        clone = StringObject::create(cx, str);
    } else if (srcObj->isDenseArray()) {
        return CloneDenseArray(cx, srcObj, clonedObjects);
    } else {
        if (srcObj->isArray()) {
            clone = NewDenseEmptyArray(cx);
        } else {
            JS_ASSERT(srcObj->isNative());
            clone = NewObjectWithClassProto(cx, srcObj->getClass(), NULL, cx->global(),
                                            srcObj->getAllocKind());
        }
    }
    if (!clone || !clonedObjects.relookupOrAdd(p, srcObj.get(), clone.get()) ||
        !CloneProperties(cx, srcObj, clone, clonedObjects))
    {
        return NULL;
    }
    return clone;
}