--- old/src/hotspot/share/memory/iterator.hpp	2017-10-31 09:39:48.068969566 -0400
+++ new/src/hotspot/share/memory/iterator.hpp	2017-10-31 09:39:47.860968535 -0400
@@ -46,6 +46,8 @@
  public:
   virtual void do_oop(oop* o) = 0;
   virtual void do_oop(narrowOop* o) = 0;
+  virtual void do_oop_no_buffering(oop* o) { do_oop(o); }
+  virtual void do_oop_no_buffering(narrowOop* o) { do_oop(o); }
 };
 
 // ExtendedOopClosure adds extra code to be run during oop iterations.