--- old/src/share/vm/runtime/frame.hpp	2019-02-15 19:02:40.566723673 +0300
+++ new/src/share/vm/runtime/frame.hpp	2019-02-15 19:02:40.458727446 +0300
@@ -181,6 +181,8 @@
   frame sender_for_interpreter_frame(RegisterMap* map) const;
   frame sender_for_native_frame(RegisterMap* map) const;
 
+  bool is_entry_frame_valid(JavaThread* thread) const;
+
   // All frames:
 
   // A low-level interface for vframes: