--- a/hotspot/src/share/vm/gc/parallel/gcTaskManager.hpp	Tue Jun 21 14:00:18 2016 +0200
+++ b/hotspot/src/share/vm/gc/parallel/gcTaskManager.hpp	Thu May 19 13:59:50 2016 -0700
@@ -556,6 +556,8 @@
   GCTaskThread* install_worker(uint worker_id);
   // Add GC workers as needed.
   void add_workers(bool initializing);
+  // Base name (without worker id #) of threads.
+  const char* group_name();
 };
 
 //