Read debug symbols provided by DDC

dwds/CHANGELOG.md

@@ -1,3 +1,15 @@
+## 12.0.0-dev
+
+- Add code for loading symbols generated by DDC, if
+  `enableDebugSymbols` is set to `true` in `dwds.start`.
+  To be used by variable inspection, not implemented yet.
+- Require at least `build_web_compilers` version  `3.1.0`.
+- Update min sdk constraint to `>=2.14.0-216.0.dev`.
+
+**Breaking changes:**
+  - Add `enableDebugSymbols` parameter `Dwds.start`, false by default.
+  - Add `symbolsContents` method to `AssetReader`.
+
 ## 11.1.2-dev
 
 - Return empty library from `ChromeProxyService.getObject` for

dwds/lib/dwds.dart

@@ -27,6 +27,7 @@ import 'src/services/expression_compiler.dart';
 
 export 'src/connections/app_connection.dart' show AppConnection;
 export 'src/connections/debug_connection.dart' show DebugConnection;
+export 'src/debugging/metadata/module_metadata.dart' show ModuleInfo;
 export 'src/debugging/metadata/provider.dart'
     show MetadataProvider, AbsoluteImportUriException;
 export 'src/events.dart' show DwdsEvent;
@@ -46,7 +47,7 @@ export 'src/readers/proxy_server_asset_reader.dart' show ProxyServerAssetReader;
 export 'src/servers/devtools.dart';
 export 'src/services/chrome_proxy_service.dart' show ChromeDebugException;
 export 'src/services/expression_compiler.dart'
-    show ExpressionCompilationResult, ExpressionCompiler, ModuleInfo;
+    show ExpressionCompilationResult, ExpressionCompiler;
 export 'src/services/expression_compiler_service.dart'
     show ExpressionCompilerService;
 
@@ -100,6 +101,7 @@ class Dwds {
     // TODO(annagrin): make expressionCompiler argument required
     // [issue 881](https://github.com/dart-lang/webdev/issues/881)
     ExpressionCompiler expressionCompiler,
+    bool enableDebugSymbols,
     bool enableDebugExtension,
     String hostname,
     bool useSseForDebugProxy,
@@ -119,6 +121,7 @@ class Dwds {
     enableDevtoolsLaunch ??= true;
     spawnDds ??= true;
     globalLoadStrategy = loadStrategy;
+    enableDebugSymbols ??= false;
 
     DevTools devTools;
     String extensionUri;
@@ -171,6 +174,7 @@ class Dwds {
       useSseForInjectedClient,
       serveDevTools,
       expressionCompiler,
+      enableDebugSymbols,
       injected,
       spawnDds,
     );

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

@@ -176,3 +176,14 @@ class ModuleMetadata {
     };
   }
 }
+
+class ModuleInfo {
+  final String fullDillPath;
+  final String summaryPath;
+  final String symbolsPath;
+
+  ModuleInfo(this.fullDillPath, this.summaryPath, this.symbolsPath);
+
+  @override
+  String toString() => '{ $fullDillPath, $summaryPath, $symbolsPath }';
+}