--- a/src/hotspot/share/code/nmethod.hpp	Fri Jan 11 11:02:00 2019 +0100
+++ b/src/hotspot/share/code/nmethod.hpp	Fri Jan 11 13:15:37 2019 +0100
@@ -376,6 +376,8 @@
 
   int   comp_level() const                        { return _comp_level; }
 
+  void unlink_from_method(bool acquire_lock);
+
   // Support for oops in scopes and relocs:
   // Note: index 0 is reserved for null.
   oop   oop_at(int index) const;