Retained size for instance in Observatory.

runtime/vm/service.cc

 // 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.
 
 #include "vm/service.h"
 
 #include "include/dart_api.h"
 #include "platform/globals.h"
 
 #include "vm/compiler.h"
 #include "vm/coverage.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/isolate.h"
 #include "vm/message.h"
 #include "vm/message_handler.h"
 #include "vm/native_entry.h"
 #include "vm/native_arguments.h"
 #include "vm/object.h"
+#include "vm/object_graph.h"
 #include "vm/object_id_ring.h"
 #include "vm/object_store.h"
 #include "vm/port.h"
 #include "vm/profiler.h"
 #include "vm/stack_frame.h"
 #include "vm/symbols.h"
 #include "vm/version.h"
 
 
 namespace dart {
@@ skipping 849 matching lines @@
     }
     const String& expr_str = String::Handle(isolate, String::New(expr));
     ASSERT(obj.IsInstance());
     const Instance& instance = Instance::Cast(obj);
     const Object& result =
         Object::Handle(instance.Evaluate(expr_str,
                                          Array::empty_array(),
                                          Array::empty_array()));
     result.PrintJSON(js, true);
     return true;
+  } else if (strcmp(action, "retained") == 0) {
+    ObjectGraph graph(isolate);
+    intptr_t retained_size = graph.SizeRetainedByInstance(obj);
+    const Object& result = Object::Handle(Integer::New(retained_size));
+    result.PrintJSON(js, true);
+    return true;
   }
 
   PrintError(js, "unrecognized action '%s'\n", action);
   return true;
 }
 
 
 static bool HandleClassesClosures(Isolate* isolate, const Class& cls,
                                   JSONStream* js) {
   intptr_t id;
@@ skipping 1061 matching lines @@
   while (current != NULL) {
     if (strcmp(name, current->name()) == 0) {
       return current;
     }
     current = current->next();
   }
   return NULL;
 }
 
 }  // namespace dart