--- old/src/hotspot/share/gc/z/zCollectedHeap.cpp	2020-07-29 15:26:47.503931365 +0800
+++ new/src/hotspot/share/gc/z/zCollectedHeap.cpp	2020-07-29 15:26:47.215931355 +0800
@@ -253,6 +253,10 @@
   _heap.object_iterate(cl, true /* visit_weaks */);
 }
 
+void ZCollectedHeap::run_task(AbstractGangTask* task) {
+  return _heap.run_task(task);
+}
+
 void ZCollectedHeap::keep_alive(oop obj) {
   _heap.keep_alive(obj);
 }