--- old/src/hotspot/share/runtime/threadSMR.hpp	2019-06-28 15:24:42.000000000 -0700
+++ new/src/hotspot/share/runtime/threadSMR.hpp	2019-06-28 15:24:42.000000000 -0700
@@ -179,7 +179,9 @@
 
   static ThreadsList* add_thread(ThreadsList* list, JavaThread* java_thread);
   static ThreadsList* remove_thread(ThreadsList* list, JavaThread* java_thread);
-
+ 
+  // Used by find_JavaThread_from_java_tid
+  static bool is_valid_java_thread(jlong java_tid, JavaThread* jt);
 public:
   ThreadsList(int entries);
   ~ThreadsList();