src/share/vm/gc/shared/referenceProcessor.cpp

rev 10739 : 8153745: Avoid spawning G1ParPreserveCMReferentsTask when there is no work to be done
Reviewed-by:

*** 1088,1097 ****
--- 1088,1106 ----
    assert(obj->is_oop(), "Discovered a bad reference");
    verify_referent(obj);
    return true;
  }
  
+ bool ReferenceProcessor::has_discovered_references() {
+   for (uint i = 0; i < _max_num_q * number_of_subclasses_of_ref(); i++) {
+     if (!_discovered_refs[i].is_empty()) {
+       return true;
+     }
+   }
+   return false;
+ }
+ 
  // Preclean the discovered references by removing those
  // whose referents are alive, and by marking from those that
  // are not active. These lists can be handled here
  // in any order and, indeed, concurrently.
  void ReferenceProcessor::preclean_discovered_references(