--- old/src/hotspot/share/gc/g1/g1MonitoringSupport.hpp	2017-09-27 00:03:25.499294246 +0900
+++ new/src/hotspot/share/gc/g1/g1MonitoringSupport.hpp	2017-09-27 00:03:25.301293989 +0900
@@ -122,6 +122,8 @@
   CollectorCounters*   _incremental_collection_counters;
   //  full stop-the-world collections
   CollectorCounters*   _full_collection_counters;
+  //  stop-the-world phases in G1
+  CollectorCounters*   _conc_collection_counters;
   //  young collection set counters.  The _eden_counters,
   // _from_counters, and _to_counters are associated with
   // this "generational" counter.
@@ -210,6 +212,9 @@
   CollectorCounters* full_collection_counters() {
     return _full_collection_counters;
   }
+  CollectorCounters* conc_collection_counters() {
+    return _conc_collection_counters;
+  }
   GenerationCounters* young_collection_counters() {
     return _young_collection_counters;
   }