[lldb][lldb-dap] show modules pane if supported by the adapter

Fixes #140589
Added logic to dynamically set the `lldb-dap.showModules` context based on the presence of modules in the debug session.

Author: da-viper

lldb/tools/lldb-dap/package.json

@@ -787,7 +787,7 @@
         {
           "id": "lldb-dap.modules",
           "name": "Modules",
-          "when": "inDebugMode && debugType == 'lldb-dap'",
+          "when": "inDebugMode && debugType == 'lldb-dap' && lldb-dap.showModules",
           "icon": "$(symbol-module)"
         }
       ]

lldb/tools/lldb-dap/src-ts/debug-session-tracker.ts

@@ -52,6 +52,7 @@ export class DebugSessionTracker
   createDebugAdapterTracker(
     session: vscode.DebugSession,
   ): vscode.ProviderResult<vscode.DebugAdapterTracker> {
+    this.showModulesTreeView(false);
     return {
       onDidSendMessage: (message) => this.onDidSendMessage(session, message),
       onExit: () => this.onExit(session),
@@ -73,6 +74,14 @@ export class DebugSessionTracker
     this.modulesChanged.fire();
   }
 
+  private showModulesTreeView(showModules: boolean) {
+    vscode.commands.executeCommand(
+      "setContext",
+      "lldb-dap.showModules",
+      showModules,
+    );
+  }
+
   private onDidSendMessage(
     session: vscode.DebugSession,
     message: DebugProtocol.ProtocolMessage,
@@ -102,6 +111,8 @@ export class DebugSessionTracker
           console.error("unexpected module event reason");
           break;
       }
+
+      this.showModulesTreeView(modules.length > 0);
       this.modules.set(session, modules);
       this.modulesChanged.fire();
     }