--- old/src/share/vm/utilities/events.cpp	2020-01-27 23:21:04.000000000 -0800
+++ new/src/share/vm/utilities/events.cpp	2020-01-27 23:21:04.000000000 -0800
@@ -38,6 +38,7 @@
 StringEventLog* Events::_exceptions = NULL;
 StringEventLog* Events::_redefinitions = NULL;
 StringEventLog* Events::_deopt_messages = NULL;
+uint GCLogEvent::_buffer_overflow_count = 0;
 
 EventLog::EventLog() {
   // This normally done during bootstrap when we're only single