Yj dartdevembedder 2488

dwds/CHANGELOG.md

@@ -11,6 +11,7 @@
   to use the provided `name` in a `ModuleMetadata`. Metadata provided by DDC
   when using the library bundle format does not provide a useful bundle name.
 - Migrate to `package:web` v1.1.0.
+- Added support for some debugging APIs with the DDC library bundle format. - [#2488](https://github.com/dart-lang/webdev/issues/2488)
 
 ## 24.1.0
 

dwds/lib/src/debugging/dart_runtime_debugger.dart

@@ -0,0 +1,86 @@
+// Copyright (c) 2024, 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 'package:dwds/src/loaders/strategy.dart';
+
+class DartRuntimeDebugger {
+  final LoadStrategy _loadStrategy;
+  final bool _useLibraryBundleExpression;
+
+  DartRuntimeDebugger({
+    required LoadStrategy loadStrategy,
+    required bool useLibraryBundleExpression,
+  })  : _loadStrategy = loadStrategy,
+        _useLibraryBundleExpression = useLibraryBundleExpression;
+
+  String _generateJsExpression(
+    String ddcExpression,
+    String libraryBundleExpression,
+  ) {
+    return _useLibraryBundleExpression
+        ? libraryBundleExpression
+        : ddcExpression;
+  }
+
+  String _wrapWithSdkLoader(String args, String functionCall) {
+    return '''
+      function($args) {
+        const sdk = ${_loadStrategy.loadModuleSnippet}("dart_sdk");
+        const dart = sdk.dart;
+        return dart.$functionCall;
+      }
+    ''';
+  }
+
+  String _wrapWithBundleLoader(String args, String functionCall) {
+    return '''
+      function($args) {
+        return dartDevEmbedder.debugger.$functionCall;
+      }
+    ''';
+  }
+
+  String _buildExpression(
+    String args,
+    String ddcFunction,
+    String libraryBundleFunction,
+  ) {
+    return _generateJsExpression(
+      _wrapWithSdkLoader(args, ddcFunction),
+      _wrapWithBundleLoader(args, libraryBundleFunction),
+    );
+  }
+
+  String getObjectMetadataJsExpression() {
+    return _buildExpression(
+      'arg',
+      'getObjectMetadata(arg)',
+      'getObjectMetadata(arg)',
+    );
+  }
+
+  String getObjectFieldNamesJsExpression() {
+    return _buildExpression(
+      '',
+      'getObjectFieldNames(this)',
+      'getObjectFieldNames(this)',
+    );
+  }
+
+  String getFunctionMetadataJsExpression() {
+    return _buildExpression(
+      '',
+      'getFunctionMetadata(this)',
+      'getFunctionName(this)',
+    );
+  }
+
+  String getSubRangeJsExpression() {
+    return _buildExpression(
+      'offset, count',
+      'getSubRange(this, offset, count)',
+      'getSubRange(this, offset, count)',
+    );
+  }
+}

dwds/lib/src/debugging/inspector.dart

@@ -643,13 +643,8 @@ class AppInspector implements AppInspectorInterface {
     // If this is a List, just call sublist. If it's a Map, get the entries, but
     // avoid doing a toList on a large map using skip/take to get the section we
     // want. To make those alternatives easier in JS, pass both count and end.
-    final expression = '''
-      function (offset, count) {
-        const sdk = ${globalToolConfiguration.loadStrategy.loadModuleSnippet}("dart_sdk");
-        const dart = sdk.dart;
-        return dart.getSubRange(this, offset, count);
-      }
-    ''';
+    final expression = globalToolConfiguration.loadStrategy.dartRuntimeDebugger
+        .getSubRangeJsExpression();
 
     return await jsCallFunctionOn(receiver, expression, args);
   }

dwds/lib/src/debugging/instance.dart

@@ -772,9 +772,9 @@ class InstanceHelper extends Domain {
     //
     // For maps and lists it's more complicated. Treat the actual SDK versions
     // of these as special.
-    final fieldNameExpression =
-        _jsRuntimeFunctionCall('getObjectFieldNames(this)');
-
+    final fieldNameExpression = globalToolConfiguration
+        .loadStrategy.dartRuntimeDebugger
+        .getObjectFieldNamesJsExpression();
     final result = await inspector.jsCallFunctionOn(
       remoteObject,
       fieldNameExpression,

dwds/lib/src/debugging/metadata/class.dart

@@ -152,13 +152,9 @@ class ClassMetaDataHelper {
   /// Returns null if the [remoteObject] is not a Dart class.
   Future<ClassMetaData?> metaDataFor(RemoteObject remoteObject) async {
     try {
-      final evalExpression = '''
-        function(arg) {
-          const sdk = ${globalToolConfiguration.loadStrategy.loadModuleSnippet}('dart_sdk');
-          const dart  = sdk.dart;
-          return dart.getObjectMetadata(arg);
-        }
-      ''';
+      final evalExpression = globalToolConfiguration
+          .loadStrategy.dartRuntimeDebugger
+          .getObjectMetadataJsExpression();
 
       final result = await _inspector.jsCallFunctionOn(
         remoteObject,

dwds/lib/src/debugging/metadata/function.dart

@@ -17,13 +17,9 @@ class FunctionMetaData {
     RemoteDebugger remoteDebugger,
     RemoteObject remoteObject,
   ) async {
-    final evalExpression = '''
-      function() {
-        const sdk = ${globalToolConfiguration.loadStrategy.loadModuleSnippet}('dart_sdk');
-        const dart = sdk.dart;
-        return dart.getFunctionMetadata(this);
-      }
-    ''';
+    final evalExpression = globalToolConfiguration
+        .loadStrategy.dartRuntimeDebugger
+        .getFunctionMetadataJsExpression();
 
     final response = await remoteDebugger.sendCommand(
       'Runtime.callFunctionOn',

dwds/lib/src/loaders/ddc.dart

@@ -4,6 +4,7 @@
 
 import 'dart:convert';
 
+import 'package:dwds/src/debugging/dart_runtime_debugger.dart';
 import 'package:dwds/src/debugging/metadata/provider.dart';
 import 'package:dwds/src/loaders/strategy.dart';
 import 'package:dwds/src/readers/asset_reader.dart';
@@ -163,6 +164,12 @@ class DdcStrategy extends LoadStrategy {
   @override
   String get loadModuleSnippet => 'dart_library.import';
 
+  @override
+  late final DartRuntimeDebugger dartRuntimeDebugger = DartRuntimeDebugger(
+    loadStrategy: this,
+    useLibraryBundleExpression: false,
+  );
+
   @override
   BuildSettings get buildSettings => _buildSettings;
 

dwds/lib/src/loaders/ddc_library_bundle.dart

@@ -4,6 +4,7 @@
 
 import 'dart:convert';
 
+import 'package:dwds/src/debugging/dart_runtime_debugger.dart';
 import 'package:dwds/src/debugging/metadata/provider.dart';
 import 'package:dwds/src/loaders/ddc.dart';
 import 'package:dwds/src/loaders/strategy.dart';
@@ -140,6 +141,12 @@ class DdcLibraryBundleStrategy extends LoadStrategy {
       "function() { throw new Error('LoadStrategy.loadModuleSnippet is used. "
       "This is currently unsupported in the DDC library bundle format.'); }";
 
+  @override
+  late final DartRuntimeDebugger dartRuntimeDebugger = DartRuntimeDebugger(
+    loadStrategy: this,
+    useLibraryBundleExpression: true,
+  );
+
   @override
   BuildSettings get buildSettings => _buildSettings;
 

dwds/lib/src/loaders/require.dart

@@ -4,6 +4,7 @@
 
 import 'dart:convert';
 
+import 'package:dwds/src/debugging/dart_runtime_debugger.dart';
 import 'package:dwds/src/debugging/metadata/provider.dart';
 import 'package:dwds/src/loaders/strategy.dart';
 import 'package:dwds/src/readers/asset_reader.dart';
@@ -164,6 +165,12 @@ class RequireStrategy extends LoadStrategy {
   @override
   String get loadModuleSnippet => 'require';
 
+  @override
+  late final DartRuntimeDebugger dartRuntimeDebugger = DartRuntimeDebugger(
+    loadStrategy: this,
+    useLibraryBundleExpression: false,
+  );
+
   /// Require JS config for ddc.
   ///
   /// Sets the base url to `/` so that all modules can be loaded using absolute
@@ -180,7 +187,7 @@ $_baseUrlScript;
 require.config({
     baseUrl: baseUrl,
     waitSeconds: 0,
-    paths: modulePaths 
+    paths: modulePaths
 });
 const modulesGraph = new Map();
 requirejs.onResourceLoad = function (context, map, depArray) {

dwds/lib/src/loaders/strategy.dart

@@ -4,6 +4,7 @@
 
 import 'dart:typed_data';
 
+import 'package:dwds/src/debugging/dart_runtime_debugger.dart';
 import 'package:dwds/src/debugging/metadata/provider.dart';
 import 'package:dwds/src/readers/asset_reader.dart';
 import 'package:dwds/src/services/expression_compiler.dart';
@@ -43,6 +44,9 @@ abstract class LoadStrategy {
   /// argument which is the module name to load.
   String get loadModuleSnippet;
 
+  /// Provides a runtime debugger for the Dart runtime.
+  DartRuntimeDebugger get dartRuntimeDebugger;
+
   /// The relative root path for library paths. The current directory will be
   /// used if this is not overridden.
   String? get libraryRoot => null;

dwds/test/fixtures/fakes.dart

@@ -5,6 +5,7 @@
 import 'dart:async';
 
 import 'package:dwds/asset_reader.dart';
+import 'package:dwds/src/debugging/dart_runtime_debugger.dart';
 import 'package:dwds/src/debugging/execution_context.dart';
 import 'package:dwds/src/debugging/inspector.dart';
 import 'package:dwds/src/debugging/instance.dart';
@@ -362,6 +363,12 @@ class FakeStrategy extends LoadStrategy {
   @override
   String get loadModuleSnippet => '';
 
+  @override
+  late final DartRuntimeDebugger dartRuntimeDebugger = DartRuntimeDebugger(
+    loadStrategy: this,
+    useLibraryBundleExpression: false,
+  );
+
   @override
   ReloadConfiguration get reloadConfiguration => ReloadConfiguration.none;
 

dwds/test/frontend_server_ddc_and_canary_evaluate_test.dart → dwds/test/frontend_server_ddc_library_bundle_evaluate_test.dart

@@ -7,6 +7,8 @@
 @Timeout(Duration(minutes: 5))
 library;
 
+import 'dart:io';
+
 import 'package:dwds/expression_compiler.dart';
 import 'package:test/test.dart';
 import 'package:test_common/test_sdk_configuration.dart';
@@ -41,11 +43,9 @@ void main() async {
                 debug: debug,
               );
             },
-            // TODO(#2488): Restore the skip argument below, related to
-            // https://github.com/dart-lang/sdk/issues/49277, once
-            // https://github.com/dart-lang/webdev/issues/2488 is resolved.
-            // skip: indexBaseMode == IndexBaseMode.base && Platform.isWindows,
-            skip: 'https://github.com/dart-lang/webdev/issues/2488',
+            skip: indexBaseMode == IndexBaseMode.base && Platform.isWindows
+                ? 'Skipped on Windows when indexBaseMode is base. See issue: https://github.com/dart-lang/sdk/issues/49277'
+                : null,
           );
         }
       });