src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.cpp

rev 57380 : 8234974: Shenandoah: Do concurrent roots even when no evacuation is necessary
rev 57381 : [mq]: JDK-8234974-changes.patch

*** 263,273 ****
--- 263,278 ----
      return NULL;
    }
  
    ShenandoahMarkingContext* const marking_context = _heap->marking_context();
    if (_heap->is_concurrent_root_in_progress() && !marking_context->is_marked(obj)) {
+     Thread* thr = Thread::current();
+     if (thr->is_Java_thread()) {
        return NULL;
+     } else {
+       return obj;
+     }
    }
  
    oop fwd = load_reference_barrier_not_null(obj);
    if (load_addr != NULL && fwd != obj) {
      // Since we are here and we know the load address, update the reference.