--- a/memory_profiler.cpp	Wed Jun 24 18:32:14 2009 -0700
+++ b/memory_profiler.cpp	Wed Jun 24 18:36:24 2009 -0700
@@ -1,4 +1,5 @@
 #include "jsdhash.h"
+#include "jsdbgapi.h"
 
 #include "memory_profiler.h"
 #include "server_socket.h"
@@ -125,7 +126,8 @@
     JSObject *info = JS_NewObject(cx, NULL, NULL, NULL);
 
     JSObject *target = (JSObject *) id;
-    JSClass *classp = JS_GET_CLASS(tracingState.tracer.context, target);
+    JSContext *targetCx = tracingState.tracer.context;
+    JSClass *classp = JS_GET_CLASS(targetCx, target);
     if (classp != NULL) {
       // TODO: Should really be using an interned string here or something.
       JSString *name = JS_NewStringCopyZ(cx, classp->name);
@@ -140,6 +142,14 @@
       }
     }
 
+    if (!JS_DefineProperty(
+          cx, info, "size",
+          INT_TO_JSVAL(JS_GetObjectTotalSize(targetCx, target)),
+          NULL, NULL, JSPROP_ENUMERATE)) {
+      JS_ReportOutOfMemory(cx);
+      return JS_FALSE;
+    }
+
     *rval = OBJECT_TO_JSVAL(info);
   } else
     *rval = JSVAL_NULL;