--- old/src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp	2020-04-28 11:55:51.687713705 +0800
+++ new/src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp	2020-04-28 11:55:51.527714526 +0800
@@ -258,6 +258,9 @@
   WorkGang& workers() {
     return _workers;
   }
+
+  // Runs the given AbstractGangTask with the current active workers.
+  virtual void run_task(AbstractGangTask* task);
 };
 
 // Class that can be used to print information about the