Added support for some debugging APIs with the DDC library bundle format

dwds/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 24.3.1
 
 - Add support for binding DDS to a custom port.
+- Added support for some debugging APIs with the DDC library bundle format. - [#2563](https://github.com/dart-lang/webdev/issues/2563)
 
 ## 24.3.0
 

dwds/lib/src/debugging/dart_runtime_debugger.dart

@@ -18,11 +18,8 @@ class DartRuntimeDebugger {
   String _generateJsExpression(
     String ddcExpression,
     String libraryBundleExpression,
-  ) {
-    return _useLibraryBundleExpression
-        ? libraryBundleExpression
-        : ddcExpression;
-  }
+  ) =>
+      _useLibraryBundleExpression ? libraryBundleExpression : ddcExpression;
 
   /// Wraps a JS function call with SDK loader logic.
   String _wrapWithSdkLoader(String args, String functionCall) {
@@ -199,4 +196,11 @@ class DartRuntimeDebugger {
       ),
     );
   }
+
+  String invokeExtensionJsExpression(String methodName, String encodedJson) {
+    return _generateJsExpression(
+      "${_loadStrategy.loadModuleSnippet}('dart_sdk').developer.invokeExtension('$methodName', JSON.stringify($encodedJson));",
+      "dartDevEmbedder.debugger.invokeExtension('$methodName', JSON.stringify($encodedJson));",
+    );
+  }
 }

dwds/lib/src/debugging/dart_scope.dart

@@ -60,6 +60,16 @@ Future<List<Property>> visibleVariables({
     final objectId = scope.object.objectId;
     if (objectId != null) {
       final properties = await inspector.getProperties(objectId);
+      for (final property in properties) {
+        if (property.name == '_\$35wc2\$35formal') {
+          final newProperty = Property({
+            'name': '_',
+            'value': property.value,
+          });
+          properties.remove(property);
+          properties.add(newProperty);
+        }
+      }
       allProperties.addAll(properties);
     }
   }

dwds/lib/src/services/chrome_proxy_service.dart

@@ -518,10 +518,8 @@ class ChromeProxyService implements VmServiceInterface {
         v is String ? v : jsonEncode(v),
       ),
     );
-    final expression = '''
-${globalToolConfiguration.loadStrategy.loadModuleSnippet}("dart_sdk").developer.invokeExtension(
-    "$method", JSON.stringify(${jsonEncode(stringArgs)}));
-''';
+    final expression = globalToolConfiguration.loadStrategy.dartRuntimeDebugger
+        .invokeExtensionJsExpression(method, jsonEncode(stringArgs));
     final result = await inspector.jsEvaluate(expression, awaitPromise: true);
     final decodedResponse =
         jsonDecode(result.value as String) as Map<String, dynamic>;

dwds/test/chrome_proxy_service_amd_test.dart

@@ -0,0 +1,40 @@
+// 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.
+
+@TestOn('vm')
+@Tags(['daily'])
+@Timeout(Duration(minutes: 2))
+library;
+
+import 'package:dwds/expression_compiler.dart';
+import 'package:test/test.dart';
+import 'package:test_common/test_sdk_configuration.dart';
+
+import 'common/chrome_proxy_service_common.dart';
+import 'fixtures/context.dart';
+
+void main() {
+  // Enable verbose logging for debugging.
+  final debug = false;
+  final canaryFeatures = false;
+  final moduleFormat = ModuleFormat.amd;
+  final compilationMode = CompilationMode.buildDaemon;
+
+  group('canary: $canaryFeatures |', () {
+    final provider = TestSdkConfigurationProvider(
+      verbose: debug,
+      canaryFeatures: canaryFeatures,
+      ddcModuleFormat: moduleFormat,
+    );
+    tearDownAll(provider.dispose);
+
+    runTests(
+      provider: provider,
+      moduleFormat: moduleFormat,
+      compilationMode: compilationMode,
+      canaryFeatures: canaryFeatures,
+      debug: debug,
+    );
+  });
+}

dwds/test/chrome_proxy_service_ddc_library_bundle_test.dart

@@ -0,0 +1,40 @@
+// 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.
+
+@TestOn('vm')
+@Tags(['daily'])
+@Timeout(Duration(minutes: 2))
+library;
+
+import 'package:dwds/expression_compiler.dart';
+import 'package:test/test.dart';
+import 'package:test_common/test_sdk_configuration.dart';
+
+import 'common/chrome_proxy_service_common.dart';
+import 'fixtures/context.dart';
+
+void main() {
+  // Enable verbose logging for debugging.
+  final debug = false;
+  final canaryFeatures = true;
+  final moduleFormat = ModuleFormat.ddc;
+  final compilationMode = CompilationMode.frontendServer;
+
+  group('canary: $canaryFeatures |', () {
+    final provider = TestSdkConfigurationProvider(
+      verbose: debug,
+      canaryFeatures: canaryFeatures,
+      ddcModuleFormat: moduleFormat,
+    );
+    tearDownAll(provider.dispose);
+
+    runTests(
+      provider: provider,
+      moduleFormat: moduleFormat,
+      compilationMode: compilationMode,
+      canaryFeatures: canaryFeatures,
+      debug: debug,
+    );
+  });
+}