--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp	Mon Oct 21 15:11:42 2019 +0200
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp	Mon Oct 21 15:11:43 2019 +0200
@@ -43,6 +43,7 @@
 class ShenandoahGCStateResetter;
 class ShenandoahHeuristics;
 class ShenandoahMarkingContext;
+class ShenandoahMarkCompact;
 class ShenandoahMode;
 class ShenandoahPhaseTimings;
 class ShenandoahHeap;
@@ -574,6 +575,9 @@
   oop pin_object(JavaThread* thread, oop obj);
   void unpin_object(JavaThread* thread, oop obj);
 
+  void sync_pinned_region_status();
+  void assert_pinned_region_status() NOT_DEBUG_RETURN;
+
 // ---------- Allocation support
 //
 private: