--- old/src/hotspot/share/gc/z/zCollectedHeap.hpp	2020-08-11 22:49:27.247941255 +0800
+++ new/src/hotspot/share/gc/z/zCollectedHeap.hpp	2020-08-11 22:49:27.067941831 +0800
@@ -98,6 +98,8 @@
 
   virtual void object_iterate(ObjectClosure* cl);
 
+  virtual void run_task(AbstractGangTask* task);
+
   virtual void keep_alive(oop obj);
 
   virtual void register_nmethod(nmethod* nm);