src/hotspot/share/gc/shared/collectedHeap.hpp

@@ -465,12 +465,14 @@
   virtual bool print_location(outputStream* st, void* addr) const = 0;
 
   // Iterator for all GC threads (other than VM thread)
   virtual void gc_threads_do(ThreadClosure* tc) const = 0;
 
-  // Run given task. Possibly in parallel if the GC supports it.
-  virtual void run_task(AbstractGangTask* task) = 0;
+  // Runs the given task with (up to) the requested number of workers.
+  // Some GCs don't support parallel worker threads and will run the
+  // task in one thread, with worker id 0.
+  void run_task_at_safepoint(AbstractGangTask* task, uint num_workers);
 
   // Print any relevant tracing info that flags imply.
   // Default implementation does nothing.
   virtual void print_tracing_info() const = 0;