diff -r 5e8f9713e343 -r 3636bab5e81e src/hotspot/share/runtime/synchronizer.hpp
--- a/src/hotspot/share/runtime/synchronizer.hpp	Fri Nov 29 11:26:25 2019 +0100
+++ b/src/hotspot/share/runtime/synchronizer.hpp	Fri Nov 29 12:09:25 2019 +0100
@@ -138,6 +138,7 @@
                               ObjectMonitor** free_head_p,
                               ObjectMonitor** free_tail_p);
   static bool is_cleanup_needed();
+  static bool needs_monitor_scavenge();
   static void oops_do(OopClosure* f);
   // Process oops in thread local used monitors
   static void thread_local_used_oops_do(Thread* thread, OopClosure* f);