src/hotspot/share/gc/z/zMark.cpp

concurrent root iterator

*** 138,147 ****
--- 138,165 ----
      // during mark.
      _mark->flush_and_free();
    }
  };
  
+ class ZMarkConcurrentRootsTask : public ZTask {
+ private:
+   ZMark* const             _mark;
+   ZConcurrentRootsIterator _roots;
+ 
+ public:
+   ZMarkConcurrentRootsTask(ZMark* mark) :
+       ZTask("ZMarkConcurrentRootsTask"),
+       _mark(mark),
+       _roots() {}
+ 
+   virtual void work() {
+     ZMarkBarrierOopClosure</* finalizable */ false> cl;
+     _roots.oops_do(&cl);
+   }
+ };
+ 
+ 
  void ZMark::start() {
    // Verification
    if (ZVerifyMarking) {
      verify_all_stacks_empty();
    }
***************
*** 152,161 ****
--- 170,184 ----
    // Mark roots
    ZMarkRootsTask task(this);
    _workers->run_parallel(&task);
  }
  
+ void ZMark::mark_concurrent_roots() {
+   ZMarkConcurrentRootsTask task(this);
+   _workers->run_concurrent(&task);
+ }
+ 
  void ZMark::prepare_work() {
    assert(_nworkers == _workers->nconcurrent(), "Invalid number of workers");
  
    // Set number of active workers
    _terminate.reset(_nworkers);