[dart2wasm] Fix param info lookup to match signature lookup logic.

Change-Id: Id20eb822d9505dda83d09626227e43dd57366ff4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/431324
Reviewed-by: Ömer Ağacan <[email protected]>
Commit-Queue: Nate Biggs <[email protected]>

Author: natebiggs

pkg/dart2wasm/lib/translator.dart

@@ -1417,7 +1417,8 @@ class Translator with KernelNodes {
     if (target.asMember.isInstanceMember) {
       final table = dispatchTableForTarget(target);
       final selector = table.selectorForTarget(target);
-      if (selector.containsTarget(target)) {
+      if (selector.containsTarget(target) ||
+          selector.isDynamicSubmoduleOverridable) {
         return selector.paramInfo;
       }
     }

pkg/dynamic_modules/test/data/overrideable_super/dynamic_interface.yaml

@@ -0,0 +1,16 @@
+# Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+extendable:
+  - library: 'shared/shared.dart'
+    class: 'Base'
+
+can-be-overridden:
+  - library: 'shared/shared.dart'
+    class: 'Base'
+    member: 'toString'
+
+callable:
+  - library: 'dart:core'
+  - library: 'shared/shared.dart'
+    class: 'Other'

pkg/dynamic_modules/test/data/overrideable_super/main.dart

@@ -0,0 +1,16 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import '../../common/testing.dart' as helper;
+import 'package:expect/expect.dart';
+
+import 'shared/shared.dart' show Child, Other;
+
+void main() async {
+  final o1 = Other();
+  Child();
+  Expect.equals('Instance of \'Other\'', o1.toString());
+  Expect.equals(3, await helper.load('entry1.dart'));
+  helper.done();
+}

pkg/dynamic_modules/test/data/overrideable_super/modules/entry1.dart

@@ -0,0 +1,8 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+@pragma('dyn-module:entry-point')
+Object? dynamicModuleEntrypoint() {
+  return 3;
+}

pkg/dynamic_modules/test/data/overrideable_super/shared/shared.dart

@@ -0,0 +1,22 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+abstract class Base {
+  const Base();
+
+  @override
+  // ignore: unnecessary_overrides
+  String toString() => super.toString();
+}
+
+class Child extends Base {
+  @override
+  // ignore: unnecessary_overrides
+  String toString() => super.toString();
+}
+
+class Other {
+  @override
+  String toString({bool? someArg1, bool? someArg2}) => super.toString();
+}