--- old/src/hotspot/share/prims/jvmtiExport.cpp	2020-08-26 23:27:57.325909173 +0900
+++ new/src/hotspot/share/prims/jvmtiExport.cpp	2020-08-26 23:27:57.241906893 +0900
@@ -1645,7 +1645,10 @@
           }
         }
         // remove the frame's entry
-        ets->clear_frame_pop(cur_frame_number);
+        {
+          MutexLocker mu(JvmtiThreadState_lock);
+          ets->clear_frame_pop(cur_frame_number);
+        }
       }
     }
   }