--- a/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Mon Dec 22 17:40:46 2014 +0000
+++ b/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Thu Dec 18 13:26:37 2014 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -66,6 +66,9 @@
   Generation* _gens[max_gens];
   GenerationSpec** _gen_specs;
 
+  // The singleton Gen Remembered Set.
+  GenRemSet* _rem_set;
+
   // The generational collector policy.
   GenCollectorPolicy* _gen_policy;
 
@@ -383,6 +386,10 @@
     return _n_gens;
   }
 
+  // This function returns the "GenRemSet" object that allows us to scan
+  // generations in a fully generational heap.
+  GenRemSet* rem_set() { return _rem_set; }
+
   // Convenience function to be used in situations where the heap type can be
   // asserted to be this type.
   static GenCollectedHeap* heap();