JSBool
XPC_COW_RewrapForChrome(JSContext *cx, JSObject *wrapperObj, jsval *vp)
{
jsval v = *vp;
if (JSVAL_IS_PRIMITIVE(v)) {
return JS_TRUE;
}
// We're rewrapping for chrome, so this is safe.
JSObject *obj = GetWrappedJSObject(cx, JSVAL_TO_OBJECT(v));
if (!obj) {
*vp = JSVAL_NULL;
return JS_TRUE;
}
XPCWrappedNative *wn;
if (IS_WRAPPER_CLASS(STOBJ_GET_CLASS(obj)) &&
(wn = XPCWrappedNative::GetWrappedNativeOfJSObject(cx, obj)) &&
!nsXPCWrappedJSClass::IsWrappedJS(wn->Native())) {
// Return an explicit XPCNativeWrapper in case "chrome" code happens to be
// XBL code cloned into an untrusted context.
return XPCNativeWrapperCtor(cx, obj, 1, vp, vp);
}
return XPC_SJOW_Construct(cx, obj, 1, vp, vp);
}
static
XPCWrappedNativeScope*
GetScopeOfObject(JSObject* obj)
{
nsISupports* supports;
js::Class* clazz = js::GetObjectClass(obj);
JSBool isWrapper = IS_WRAPPER_CLASS(clazz);
if (isWrapper && IS_SLIM_WRAPPER_OBJECT(obj))
return GetSlimWrapperProto(obj)->GetScope();
if (!isWrapper || !(supports = (nsISupports*) xpc_GetJSPrivate(obj)))
return nsnull;
#ifdef DEBUG
{
nsCOMPtr<nsIXPConnectWrappedNative> iface = do_QueryInterface(supports);
NS_ASSERTION(iface, "Uh, how'd this happen?");
}
#endif
// obj is one of our nsXPConnectWrappedNative objects.
return ((XPCWrappedNative*)supports)->GetScope();
}
/**
* Get the interface name and member name (for error messages).
*
* We could instead have each quick stub pass its name to the error-handling
* functions, as that name is statically known. But that would be redundant;
* the information is handy at runtime anyway. Also, this code often produces
* a more specific error message, e.g. "[nsIDOMHTMLDocument.appendChild]"
* rather than "[nsIDOMNode.appendChild]".
*/
static void
GetMemberInfo(JSObject *obj,
jsval memberId,
const char **ifaceName,
const char **memberName)
{
// Get the interface name. From DefinePropertyIfFound (in
// xpcwrappednativejsops.cpp) and XPCThrower::Verbosify.
//
// We could instead make the quick stub could pass in its interface name,
// but this code often produces a more specific error message, e.g.
*ifaceName = "Unknown";
NS_ASSERTION(IS_WRAPPER_CLASS(STOBJ_GET_CLASS(obj)) ||
STOBJ_GET_CLASS(obj) == &XPC_WN_Tearoff_JSClass ||
IS_SLIM_WRAPPER(obj),
"obj must be a wrapper");
XPCWrappedNativeProto *proto;
if(IS_SLIM_WRAPPER(obj))
{
proto = GetSlimWrapperProto(obj);
}
else
{
XPCWrappedNative *wrapper = (XPCWrappedNative *) obj->getPrivate();
proto = wrapper->GetProto();
}
if(proto)
{
XPCNativeSet *set = proto->GetSet();
if(set)
{
XPCNativeMember *member;
XPCNativeInterface *iface;
if(set->FindMember(memberId, &member, &iface))
*ifaceName = iface->GetNameString();
}
}
*memberName = (JSVAL_IS_STRING(memberId)
? JS_GetStringBytes(JSVAL_TO_STRING(memberId))
: "unknown");
}
static
XPCWrappedNativeScope*
GetScopeOfObject(JSObject* obj)
{
nsISupports* supports;
JSClass* clazz = STOBJ_GET_CLASS(obj);
if(!IS_WRAPPER_CLASS(clazz) ||
!(supports = (nsISupports*) xpc_GetJSPrivate(obj)))
{
#ifdef DEBUG
{
if(!(~clazz->flags & (JSCLASS_HAS_PRIVATE |
JSCLASS_PRIVATE_IS_NSISUPPORTS)) &&
(supports = (nsISupports*) xpc_GetJSPrivate(obj)) &&
!XPCNativeWrapper::IsNativeWrapperClass(clazz))
{
nsCOMPtr<nsIXPConnectWrappedNative> iface =
do_QueryInterface(supports);
NS_ASSERTION(!iface, "Uh, how'd this happen?");
}
}
#endif
return nsnull;
}
#ifdef DEBUG
{
nsCOMPtr<nsIXPConnectWrappedNative> iface = do_QueryInterface(supports);
NS_ASSERTION(iface, "Uh, how'd this happen?");
}
#endif
// obj is one of our nsXPConnectWrappedNative objects.
return ((XPCWrappedNative*)supports)->GetScope();
}
