--- a/src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp	Wed Oct 22 11:18:17 2014 -0700
+++ b/src/share/vm/gc_implementation/g1/dirtyCardQueue.hpp	Thu Oct 23 12:02:08 2014 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 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
@@ -47,6 +47,13 @@
     // active field set to true.
     PtrQueue(qset_, perm, true /* active */) { }
 
+  // Flush before destroying; queue may be used to capture pending work while
+  // doing something else, with auto-flush on completion.
+  ~DirtyCardQueue() { if (!is_permanent()) flush(); }
+
+  // Process queue entries and release resources.
+  void flush() { flush_impl(); }
+
   // Apply the closure to all elements, and reset the index to make the
   // buffer empty.  If a closure application returns "false", return
   // "false" immediately, halting the iteration.  If "consume" is true,