--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.inline.hpp	2018-03-29 11:10:18.242613481 +0200
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.inline.hpp	2018-03-29 11:10:17.984605568 +0200
@@ -255,6 +255,11 @@
   return _prev_mark_bitmap->is_marked((HeapWord*)p);
 }
 
+bool G1ConcurrentMark::is_marked_in_next_bitmap(oop p) const {
+  assert(p != NULL && oopDesc::is_oop(p), "expected an oop");
+  return _next_mark_bitmap->is_marked((HeapWord*)p);    
+}
+
 inline bool G1ConcurrentMark::do_yield_check() {
   if (SuspendibleThreadSet::should_yield()) {
     SuspendibleThreadSet::yield();