--- old/src/hotspot/share/oops/oop.hpp	2019-08-19 15:57:17.378207192 +0200
+++ new/src/hotspot/share/oops/oop.hpp	2019-08-19 15:57:17.154203186 +0200
@@ -313,6 +313,10 @@
   inline markWord displaced_mark_raw() const;
   inline void     set_displaced_mark_raw(markWord m);
 
+  // Checks if the mark word needs to be preserved
+  inline bool mark_must_be_preserved(markWord m) const;
+  inline bool mark_must_be_preserved_for_promotion_failure(markWord m) const;
+
   static bool has_klass_gap();
 
   // for code generation