diff -r 95fce20624fc -r eef07cd490d4 src/share/vm/runtime/fprofiler.cpp
--- a/src/share/vm/runtime/fprofiler.cpp	Wed Jul 03 20:04:13 2019 +0800
+++ b/src/share/vm/runtime/fprofiler.cpp	Wed Jul 03 20:42:37 2019 +0800
@@ -775,7 +775,7 @@
 }
 
 void ThreadProfiler::vm_update(TickPosition where) {
-  vm_update(NULL, where);
+  vm_update("", where);
 }
 
 void ThreadProfiler::vm_update(const char* name, TickPosition where) {