--- old/src/hotspot/share/gc/shared/collectedHeap.cpp	2020-02-21 11:14:38.164162258 +0100
+++ new/src/hotspot/share/gc/shared/collectedHeap.cpp	2020-02-21 11:14:37.960158844 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -331,6 +331,9 @@
   return MemoryUsage(InitialHeapSize, used(), capacity(), max_capacity());
 }
 
+ObjectMarker* CollectedHeap::object_marker() {
+  return new DefaultObjectMarker();
+}
 
 #ifndef PRODUCT
 void CollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) {