static JSObject *
CloneObject(JSContext *cx, HandleObject selfHostedObject)
{
AutoCycleDetector detect(cx, selfHostedObject);
if (!detect.init())
return nullptr;
if (detect.foundCycle()) {
JS_ReportError(cx, "SelfHosted cloning cannot handle cyclic object graphs.");
return nullptr;
}
RootedObject clone(cx);
if (selfHostedObject->is<JSFunction>()) {
RootedFunction selfHostedFunction(cx, &selfHostedObject->as<JSFunction>());
bool hasName = selfHostedFunction->atom() != nullptr;
// Arrow functions use the first extended slot for their lexical |this| value.
JS_ASSERT(!selfHostedFunction->isArrow());
js::gc::AllocKind kind = hasName
? JSFunction::ExtendedFinalizeKind
: selfHostedFunction->getAllocKind();
clone = CloneFunctionObject(cx, selfHostedFunction, cx->global(), kind, TenuredObject);
// To be able to re-lazify the cloned function, its name in the
// self-hosting compartment has to be stored on the clone.
if (clone && hasName)
clone->as<JSFunction>().setExtendedSlot(0, StringValue(selfHostedFunction->atom()));
} else if (selfHostedObject->is<RegExpObject>()) {
RegExpObject &reobj = selfHostedObject->as<RegExpObject>();
RootedAtom source(cx, reobj.getSource());
JS_ASSERT(source->isPermanentAtom());
clone = RegExpObject::createNoStatics(cx, source, reobj.getFlags(), nullptr);
} else if (selfHostedObject->is<DateObject>()) {
clone = JS_NewDateObjectMsec(cx, selfHostedObject->as<DateObject>().UTCTime().toNumber());
} else if (selfHostedObject->is<BooleanObject>()) {
clone = BooleanObject::create(cx, selfHostedObject->as<BooleanObject>().unbox());
} else if (selfHostedObject->is<NumberObject>()) {
clone = NumberObject::create(cx, selfHostedObject->as<NumberObject>().unbox());
} else if (selfHostedObject->is<StringObject>()) {
JSString *selfHostedString = selfHostedObject->as<StringObject>().unbox();
if (!selfHostedString->isFlat())
MOZ_CRASH();
RootedString str(cx, js_NewStringCopyN<CanGC>(cx,
selfHostedString->asFlat().chars(),
selfHostedString->asFlat().length()));
if (!str)
return nullptr;
clone = StringObject::create(cx, str);
} else if (selfHostedObject->is<ArrayObject>()) {
clone = NewDenseEmptyArray(cx, nullptr, TenuredObject);
} else {
JS_ASSERT(selfHostedObject->isNative());
clone = NewObjectWithGivenProto(cx, selfHostedObject->getClass(), nullptr, cx->global(),
selfHostedObject->tenuredGetAllocKind(),
SingletonObject);
}
if (!clone)
return nullptr;
if (!CloneProperties(cx, selfHostedObject, clone))
return nullptr;
return clone;
}
static JSObject *
CloneObject(JSContext *cx, JSObject *selfHostedObject, CloneMemory &clonedObjects)
{
DependentAddPtr<CloneMemory> p(cx, clonedObjects, selfHostedObject);
if (p)
return p->value();
RootedObject clone(cx);
if (selfHostedObject->is<JSFunction>()) {
JSFunction *selfHostedFunction = &selfHostedObject->as<JSFunction>();
bool hasName = selfHostedFunction->atom() != nullptr;
js::gc::AllocKind kind = hasName
? JSFunction::ExtendedFinalizeKind
: selfHostedFunction->getAllocKind();
clone = CloneFunctionObject(cx, HandleFunction::fromMarkedLocation(&selfHostedFunction),
cx->global(), kind, TenuredObject);
// To be able to re-lazify the cloned function, its name in the
// self-hosting compartment has to be stored on the clone.
if (clone && hasName)
clone->as<JSFunction>().setExtendedSlot(0, StringValue(selfHostedFunction->atom()));
} else if (selfHostedObject->is<RegExpObject>()) {
RegExpObject &reobj = selfHostedObject->as<RegExpObject>();
RootedAtom source(cx, reobj.getSource());
JS_ASSERT(source->isPermanentAtom());
clone = RegExpObject::createNoStatics(cx, source, reobj.getFlags(), nullptr);
} else if (selfHostedObject->is<DateObject>()) {
clone = JS_NewDateObjectMsec(cx, selfHostedObject->as<DateObject>().UTCTime().toNumber());
} else if (selfHostedObject->is<BooleanObject>()) {
clone = BooleanObject::create(cx, selfHostedObject->as<BooleanObject>().unbox());
} else if (selfHostedObject->is<NumberObject>()) {
clone = NumberObject::create(cx, selfHostedObject->as<NumberObject>().unbox());
} else if (selfHostedObject->is<StringObject>()) {
JSString *selfHostedString = selfHostedObject->as<StringObject>().unbox();
if (!selfHostedString->isFlat())
MOZ_CRASH();
RootedString str(cx, js_NewStringCopyN<CanGC>(cx,
selfHostedString->asFlat().chars(),
selfHostedString->asFlat().length()));
if (!str)
return nullptr;
clone = StringObject::create(cx, str);
} else if (selfHostedObject->is<ArrayObject>()) {
clone = NewDenseEmptyArray(cx, nullptr, TenuredObject);
} else {
JS_ASSERT(selfHostedObject->isNative());
clone = NewObjectWithGivenProto(cx, selfHostedObject->getClass(), nullptr, cx->global(),
selfHostedObject->tenuredGetAllocKind(),
SingletonObject);
}
if (!clone)
return nullptr;
if (!p.add(cx, clonedObjects, selfHostedObject, clone))
return nullptr;
if (!CloneProperties(cx, selfHostedObject, clone, clonedObjects)) {
clonedObjects.remove(selfHostedObject);
return nullptr;
}
return clone;
}