--- old/src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp	2017-09-22 13:33:04.269857229 -0700
+++ new/src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp	2017-09-22 13:33:03.921858376 -0700
@@ -132,7 +132,6 @@
   HeapWord* end() const                          { return _end; }
   HeapWord* slow_path_end() const                { return _slow_path_end; }
   HeapWord* actual_end() const                   { return _actual_end; }
-
   HeapWord* hard_end();
   HeapWord* top() const                          { return _top; }
   HeapWord* pf_top() const                       { return _pf_top; }
@@ -180,7 +179,8 @@
   void fill(HeapWord* start, HeapWord* top, size_t new_size);
   void initialize();
 
-  void pick_next_sample();
+  void pick_next_sample(size_t diff = 0);
+  void set_sample_end();
   void set_back_actual_end();
   void handle_sample(Thread* thread, HeapWord* result, size_t size);
   size_t bytes_until_sample() { return _bytes_until_sample; }