Fix: Return error and avoid panicking in SetOpener function (#33002)

* Fix: Return error and avoid panicking in SetOpener function

Signed-off-by: Bentaimia Haddadi <haddadi.taym@gmail.com>

* eturn JSFailed onstead of InvalidState

Signed-off-by: Bentaimia Haddadi <haddadi.taym@gmail.com>

* Update wpt test result

Signed-off-by: Bentaimia Haddadi <haddadi.taym@gmail.com>

---------

Signed-off-by: Bentaimia Haddadi <haddadi.taym@gmail.com>

components/script/dom/webidls/Window.webidl

@@ -36,7 +36,7 @@
   // Note that this can return null in the case that the browsing context has been discarded.
   // https://github.com/whatwg/html/issues/2115
   [LegacyUnforgeable, CrossOriginReadable] readonly attribute WindowProxy? top;
-  [CrossOriginReadable] attribute any opener;
+  [Throws, CrossOriginReadable] attribute any opener;
   // Note that this can return null in the case that the browsing context has been discarded.
   // https://github.com/whatwg/html/issues/2115
   [Replaceable, CrossOriginReadable] readonly attribute WindowProxy? parent;

components/script/dom/window.rs

@@ -702,41 +702,43 @@ impl WindowMethods for Window {
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-opener
-    fn Opener(&self, cx: JSContext, in_realm_proof: InRealm) -> JSVal {
+    fn GetOpener(&self, cx: JSContext) -> Fallible<JSVal> {
         // Step 1, Let current be this Window object's browsing context.
         let current = match self.window_proxy.get() {
             Some(proxy) => proxy,
             // Step 2, If current is null, then return null.
-            None => return NullValue(),
+            None => return Ok(NullValue()),
         };
         // Still step 2, since the window's BC is the associated doc's BC,
         // see https://html.spec.whatwg.org/multipage/#window-bc
         // and a doc's BC is null if it has been discarded.
         // see https://html.spec.whatwg.org/multipage/#concept-document-bc
         if current.is_browsing_context_discarded() {
-            return NullValue();
+            return Ok(NullValue());
         }
         // Step 3 to 5.
-        current.opener(*cx, in_realm_proof)
+        Ok(current.opener(*cx))
     }
 
     #[allow(unsafe_code)]
     // https://html.spec.whatwg.org/multipage/#dom-opener
-    fn SetOpener(&self, cx: JSContext, value: HandleValue) {
+    fn SetOpener(&self, cx: JSContext, value: HandleValue) -> ErrorResult {
         // Step 1.
         if value.is_null() {
-            return self.window_proxy().disown();
+            self.window_proxy().disown();
+            return Ok(());
         }
         // Step 2.
         let obj = self.reflector().get_jsobject();
         unsafe {
-            assert!(JS_DefineProperty(
-                *cx,
-                obj,
-                c"opener".as_ptr(),
-                value,
-                JSPROP_ENUMERATE as u32
-            ));
+            let result =
+                JS_DefineProperty(*cx, obj, c"opener".as_ptr(), value, JSPROP_ENUMERATE as u32);
+
+            if result {
+                Ok(())
+            } else {
+                Err(Error::JSFailed)
+            }
         }
     }
 

components/script/dom/windowproxy.rs

@@ -418,7 +418,7 @@ impl WindowProxy {
 
     #[allow(unsafe_code)]
     // https://html.spec.whatwg.org/multipage/#dom-opener
-    pub fn opener(&self, cx: *mut JSContext, in_realm_proof: InRealm) -> JSVal {
+    pub fn opener(&self, cx: *mut JSContext) -> JSVal {
         if self.disowned.get() {
             return NullValue();
         }
@@ -436,8 +436,11 @@ impl WindowProxy {
                     opener_id,
                 ) {
                     Some(opener_top_id) => {
-                        let global_to_clone_from =
-                            unsafe { GlobalScope::from_context(cx, in_realm_proof) };
+                        let in_realm_proof =
+                            AlreadyInRealm::assert_for_cx(unsafe { SafeJSContext::from_ptr(cx) });
+                        let global_to_clone_from = unsafe {
+                            GlobalScope::from_context(cx, InRealm::Already(&in_realm_proof))
+                        };
                         let creator =
                             CreatorBrowsingContextInfo::from(parent_browsing_context, None);
                         WindowProxy::new_dissimilar_origin(

tests/wpt/meta-legacy-layout/html/browsers/the-window-object/window-opener-unconfigurable.window.js.ini

@@ -1,2 +0,0 @@
-[window-opener-unconfigurable.window.html]
-  expected: CRASH

tests/wpt/meta/html/browsers/the-window-object/window-opener-unconfigurable.window.js.ini

@@ -1,2 +0,0 @@
-[window-opener-unconfigurable.window.html]
-  expected: CRASH