Shutdown the service isolate when shutting down the VM

runtime/vm/service/vmservice.dart

 // Copyright (c) 2013, 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.
 
 library vmservice;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:isolate';
 
 part 'client.dart';
 part 'constants.dart';
 part 'running_isolate.dart';
 part 'running_isolates.dart';
 part 'message.dart';
 part 'message_router.dart';
 
 final RawReceivePort isolateLifecyclePort = new RawReceivePort();
 final RawReceivePort scriptLoadPort = new RawReceivePort();
 
+typedef ShutdownCallback();
+
 class VMService extends MessageRouter {
   static VMService _instance;
   /// Collection of currently connected clients.
   final Set<Client> clients = new Set<Client>();
 
   // A map encoding which clients are interested in which kinds of events.
   final Map<int, Set<Client>> eventMap = new Map<int, Set<Client>>();
 
   /// Collection of currently running isolates.
   RunningIsolates runningIsolates = new RunningIsolates();
 
   /// A port used to receive events from the VM.
   final RawReceivePort eventPort;
 
+  ShutdownCallback onShutdown;
+
   void _addClient(Client client) {
     clients.add(client);
   }
 
   void _removeClient(Client client) {
     clients.remove(client);
   }
 
   int eventTypeCode(String eventType) {
     switch(eventType) {
@@ skipping 42 matching lines @@
   void _eventMessageHandler(int eventType, dynamic eventMessage) {
     var subscribers = eventMap[eventType];
     if (subscribers == null) {
       return;
     }
     for (var subscriber in subscribers) {
       subscriber.post(null, eventMessage);
     }
   }
 
+  void _exit() {
+    if (onShutdown != null) {
+      onShutdown();
+    }
+    isolateLifecyclePort.close();
+    scriptLoadPort.close();
+    var clientList = clients.toList();
+    for (var client in clientList) {
+      client.close();
+    }
+    _onExit();
+  }
+
   void messageHandler(message) {
     assert(message is List);
-    if (message is List && message.length == 4) {
+    if (message is List && (message.length == 4)) {
       _controlMessageHandler(message[0], message[1], message[2], message[3]);
-    } else if (message is List && message.length == 2) {
+    } else if (message is List && (message.length == 2)) {
       _eventMessageHandler(message[0], message[1]);
+    } else if (message is List && (message.length == 1)) {
+      assert(message[0] == Constants.SERVICE_EXIT_MESSAGE_ID);
+      _exit();
     } else {
       Logger.root.severe('Unexpected message: $message');
     }
   }
 
   void _notSupported(_) {
     throw new UnimplementedError('Service script loading not supported.');
   }
 
   VMService._internal()
@@ skipping 44 matching lines @@
 
 void _registerIsolate(int port_id, SendPort sp, String name) {
   var service = new VMService();
   service.runningIsolates.isolateStartup(port_id, sp, name);
 }
 
 void _setEventMask(int mask)
     native "VMService_SetEventMask";
 
 void _onStart() native "VMService_OnStart";
+
+void _onExit() native "VMService_OnExit";