--- a/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Wed Aug 06 11:57:31 2008 -0400
+++ b/hotspot/src/share/vm/memory/genCollectedHeap.hpp	Thu Aug 21 23:36:31 2008 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2008 Sun Microsystems, Inc.  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
@@ -274,6 +274,9 @@
   // be provided are returned as a list of ScratchBlocks, sorted by
   // decreasing size.
   ScratchBlock* gather_scratch(Generation* requestor, size_t max_alloc_words);
+  // Allow each generation to reset any scratch space that it has
+  // contributed as it needs.
+  void release_scratch();
 
   size_t large_typearray_limit();
 
@@ -497,6 +500,9 @@
   bool should_do_concurrent_full_gc(GCCause::Cause cause);
   void collect_mostly_concurrent(GCCause::Cause cause);
 
+  // Save the tops of the spaces in all generations
+  void record_gen_tops_before_GC() PRODUCT_RETURN;
+
 protected:
   virtual void gc_prologue(bool full);
   virtual void gc_epilogue(bool full);