Track per-class promotion stats.

runtime/bin/vmservice/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] is an object known to the VM service and is tied
 /// to an owning [Isolate].
 abstract class ServiceObject extends Observable {
   static int LexicalSortName(ServiceObject o1, ServiceObject o2) {
@@ skipping 1278 matching lines @@
   @observable bool isPatch;
   @observable bool isImplemented;
 
   @observable int tokenPos;
   @observable int endTokenPos;
 
   @observable ServiceMap error;
 
   final Allocations newSpace = new Allocations();
   final Allocations oldSpace = new Allocations();
+  final AllocationCount promotedByLastNewGC = new AllocationCount();
 
   bool get hasNoAllocations => newSpace.empty && oldSpace.empty;
 
   @reflectable final children = new ObservableList<Class>();
   @reflectable final subClasses = new ObservableList<Class>();
   @reflectable final fields = new ObservableList<ServiceMap>();
   @reflectable final functions = new ObservableList<ServiceFunction>();
   @reflectable final interfaces = new ObservableList<Class>();
 
   bool get canCache => true;
@@ skipping 52 matching lines @@
     superClass = map['super'];
     if (superClass != null) {
       superClass._addToChildren(this);
     }
     error = map['error'];
 
     var allocationStats = map['allocationStats'];
     if (allocationStats != null) {
       newSpace.update(allocationStats['new']);
       oldSpace.update(allocationStats['old']);
+      promotedByLastNewGC.instances = allocationStats['promotedInstances'];
+      promotedByLastNewGC.bytes = allocationStats['promotedBytes'];
     }
   }
 
   void _addToChildren(Class cls) {
     if (children.contains(cls)) {
       return;
     }
     children.add(cls);
   }
 
@@ skipping 875 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);
     }
   }
 }