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

concurrent root iterator

*** 334,343 ****
--- 334,344 ----
    }
  
    // Phase 2: Concurrent Mark
    {
      ZStatTimer timer(ZPhaseConcurrentMark);
+     ZHeap::heap()->mark_concurrent_roots();
      ZHeap::heap()->mark();
    }
  
    // Phase 3: Pause Mark End
    {