diff -r 0d47edc1ad6d -r c82e388e17c5 hotspot/src/share/vm/memory/generation.hpp
--- a/hotspot/src/share/vm/memory/generation.hpp	Sat Dec 20 00:45:18 2008 -0800
+++ b/hotspot/src/share/vm/memory/generation.hpp	Tue Jan 06 07:05:05 2009 -0800
@@ -518,6 +518,11 @@
   // each.
   virtual void object_iterate(ObjectClosure* cl);
 
+  // Iterate over all safe objects in the generation, calling "cl.do_object" on
+  // each.  An object is safe if its references point to other objects in
+  // the heap.  This defaults to object_iterate() unless overridden.
+  virtual void safe_object_iterate(ObjectClosure* cl);
+
   // Iterate over all objects allocated in the generation since the last
   // collection, calling "cl.do_object" on each.  The generation must have
   // been initialized properly to support this function, or else this call