--- old/src/hotspot/share/gc/epsilon/epsilonHeap.hpp	2020-07-23 11:41:26.316391199 +0800
+++ new/src/hotspot/share/gc/epsilon/epsilonHeap.hpp	2020-07-23 11:41:26.156391894 +0800
@@ -141,6 +141,9 @@
   virtual void print_tracing_info() const;
   virtual bool print_location(outputStream* st, void* addr) const;
 
+  // Runs the given AbstractGangTask with the current active workers.
+  virtual void run_task(AbstractGangTask* task);
+
 private:
   void print_heap_info(size_t used) const;
   void print_metaspace_info() const;