Implement 'print', 'up', 'down', and 'frame' commands in the Observatory debugger.

runtime/observatory/lib/src/service/object.dart

 // Copyright (c) 2014, 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 service;
 
 /// A [ServiceObject] represents a persistent object within the vm.
 abstract class ServiceObject extends Observable {
   static int LexicalSortName(ServiceObject o1, ServiceObject o2) {
     return o1.name.compareTo(o2.name);
@@ skipping 1117 matching lines @@
   Future<ServiceObject> addBreakpointAtEntry(ServiceFunction function) {
     return invokeRpc('addBreakpointAtEntry',
                      { 'functionId': function.id });
   }
 
   Future removeBreakpoint(Breakpoint bpt) {
     return invokeRpc('removeBreakpoint',
                      { 'breakpointId': bpt.id });
   }
 
-  // TODO(turnidge): If the user invokes pause (or other rpcs) twice,
-  // they could get a race.  Consider returning an "in progress"
-  // future to avoid this.
   Future pause() {
     return invokeRpc('pause', {}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
-        return isolate.reload();
       });
   }
 
   Future resume() {
     return invokeRpc('resume', {}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
-        return isolate.reload();
       });
   }
 
   Future stepInto() {
     return invokeRpc('resume', {'step': 'into'}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
-        return isolate.reload();
       });
   }
 
   Future stepOver() {
     return invokeRpc('resume', {'step': 'over'}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
-        return isolate.reload();
       });
   }
 
   Future stepOut() {
     return invokeRpc('resume', {'step': 'out'}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
-        return isolate.reload();
       });
   }
 
   Future<ServiceMap> getStack() {
     return invokeRpc('getStack', {}).then((result) {
         if (result is DartError) {
           // TODO(turnidge): Handle this more gracefully.
           Logger.root.severe(result.message);
         }
         return result;
       });
   }
 
   Future<ServiceObject> eval(ServiceObject target,
                              String expression) {
     Map params = {
       'targetId': target.id,
       'expression': expression,
     };
     return invokeRpc('eval', params);
   }
 
+  Future<ServiceObject> evalFrame(int framePos,
+                                  String expression) {
+    Map params = {
+      'frame': framePos,
+      'expression': expression,
+    };
+    return invokeRpc('evalFrame', params);
+  }
+
   Future<ServiceObject> getRetainedSize(ServiceObject target) {
     Map params = {
       'targetId': target.id,
     };
     return invokeRpc('getRetainedSize', params);
   }
 
   Future<ServiceObject> getRetainingPath(ServiceObject target, var limit) {
     Map params = {
       'targetId': target.id,
@@ skipping 708 matching lines @@
           "${owningClass.name}.${name}" :
           name;
     } else {
       qualifiedName = "${parent.qualifiedName}.${name}";
     }
 
     if (mapIsRef) {
       return;
     }
 
+    _loaded = true;
     isStatic = map['static'];
     isConst = map['const'];
     parent = map['parent'];
     script = map['script'];
     tokenPos = map['tokenPos'];
     endTokenPos = map['endTokenPos'];
     code = _convertNull(map['code']);
     unoptimizedCode = _convertNull(map['unoptimizedCode']);
     isOptimizable = map['optimizable'];
     isInlinable = map['inlinable'];
@@ skipping 947 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }