--- old/src/share/vm/memory/threadLocalAllocBuffer.hpp	2014-07-16 17:26:32.464290453 -0500
+++ new/src/share/vm/memory/threadLocalAllocBuffer.hpp	2014-07-16 17:26:32.308290455 -0500
@@ -170,6 +170,12 @@
   static ByteSize slow_allocations_offset()      { return byte_offset_of(ThreadLocalAllocBuffer, _slow_allocations ); }
 
   void verify();
+  void reset_to_null() {
+    set_start(NULL);
+    set_top(NULL);
+    set_pf_top(NULL);
+    set_end(NULL);
+  }
 };
 
 class GlobalTLABStats: public CHeapObj<mtThread> {