--- old/src/hotspot/share/gc/shenandoah/shenandoahPassiveMode.hpp	2020-04-06 16:01:05.553778990 +0200
+++ new/src/hotspot/share/gc/shenandoah/shenandoahPassiveMode.hpp	2020-04-06 16:01:05.446779058 +0200
@@ -31,6 +31,10 @@
 public:
   virtual void initialize_flags() const;
   virtual ShenandoahHeuristics* initialize_heuristics() const;
+
+  virtual const char* name()     { return "Passive"; }
+  virtual bool is_diagnostic()   { return true; }
+  virtual bool is_experimental() { return false; }
 };
 
 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHNORMALMODE_HPP