Service isolate rework

runtime/bin/vmservice/server.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.
 
 part of vmservice_io;
 
 class WebSocketClient extends Client {
   static const int PARSE_ERROR_CODE = 4000;
   static const int BINARY_MESSAGE_ERROR_CODE = 4001;
   static const int NOT_MAP_ERROR_CODE = 4002;
@@ skipping 144 matching lines @@
     client.onMessage(null, message);
   }
 
   Future startup() {
     if (_server != null) {
       // Already running.
       return new Future.value(this);
     }
 
     // Startup HTTP server.
+    print('Trying to start server for $_ip $_port');
     return HttpServer.bind(_ip, _port).then((s) {
+      print('started');

[Cutch, 2014/09/19 21:25:58]

This never happens when I run:

./out/DebugIA32/dart --package-root=out/DebugIA32/packages
tests/standalone/vmservice/unknown_command_test.dart

It's hung waiting for the bind to occur. If I send a SIGQUIT everything starts
moving again.

       _server = s;
       _server.listen(_requestHandler);
       if (_displayMessages) {
         var ip = _server.address.address.toString();
         var port = _server.port.toString();
         print('Observatory listening on http://$ip:$port');
       }
       // Server is up and running.
       return this;
     }).catchError((e, st) {
@@ skipping 21 matching lines @@
       _server = null;
       return this;
     }).catchError((e, st) {
       _server = null;
       print('Could not shutdown Observatory HTTP server:\n$e\n$st\n');
       return this;
     });
   }
 
 }