- Add getters for the current packageRoot or packageMap.

runtime/lib/isolate_patch.dart

 // Copyright (c) 2012, 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 "dart:collection" show HashMap;
 import "dart:_internal";
 
 patch class ReceivePort {
   /* patch */ factory ReceivePort() = _ReceivePortImpl;
 
@@ skipping 257 matching lines @@
   };
   // Make sure the message handler is triggered.
   port.sendPort.send(null);
 }
 
 patch class Isolate {
   static final _currentIsolate = _getCurrentIsolate();
 
   /* patch */ static Isolate get current => _currentIsolate;
 
+  /* patch */ static Future<Uri> get packageRoot {
+    var hook = VMLibraryHooks.getPackageRoot;
+    if (hook == null) {
+      throw new UnimplementedError("Isolate.packageRoot");
+    }
+    return hook();
+  }
+
+  /* patch */ static Future<Map<String, Uri>> get packageMap {
+    var hook = VMLibraryHooks.getPackageMap;
+    if (hook == null) {
+      throw new UnimplementedError("Isolate.packageMap");
+    }
+    return hook();
+  }
+
   /* patch */ static Future<Isolate> spawn(
       void entryPoint(message), var message,
       {bool paused: false, bool errorsAreFatal,
        SendPort onExit, SendPort onError}) {
     // `paused` isn't handled yet.
     RawReceivePort readyPort;
     try {
       // The VM will invoke [_startIsolate] with entryPoint as argument.
       readyPort = new RawReceivePort();
       _spawnFunction(readyPort.sendPort, entryPoint, message,
@@ skipping 171 matching lines @@
   static Isolate _getCurrentIsolate() {
     List portAndCapabilities = _getPortAndCapabilitiesOfCurrentIsolate();
     return new Isolate(portAndCapabilities[0],
                        pauseCapability: portAndCapabilities[1],
                        terminateCapability: portAndCapabilities[2]);
   }
 
   static List _getPortAndCapabilitiesOfCurrentIsolate()
       native "Isolate_getPortAndCapabilitiesOfCurrentIsolate";
 }