src/hotspot/share/gc/shared/parallelCleaning.cpp

*** 92,102 ****
          claimed_nmethods[i] = last.method();
          (*num_claimed_nmethods)++;
        }
      }
  
!   } while (Atomic::cmpxchg(last.method(), &_claimed_nmethod, first) != first);
  }
  
  void CodeCacheUnloadingTask::work(uint worker_id) {
    // The first nmethods is claimed by the first worker.
    if (worker_id == 0 && _first_nmethod != NULL) {
--- 92,102 ----
          claimed_nmethods[i] = last.method();
          (*num_claimed_nmethods)++;
        }
      }
  
!   } while (Atomic::cmpxchg(&_claimed_nmethod, first, last.method()) != first);
  }
  
  void CodeCacheUnloadingTask::work(uint worker_id) {
    // The first nmethods is claimed by the first worker.
    if (worker_id == 0 && _first_nmethod != NULL) {
*** 128,138 ****
  bool KlassCleaningTask::claim_clean_klass_tree_task() {
    if (_clean_klass_tree_claimed) {
      return false;
    }
  
!   return Atomic::cmpxchg(1, &_clean_klass_tree_claimed, 0) == 0;
  }
  
  InstanceKlass* KlassCleaningTask::claim_next_klass() {
    Klass* klass;
    do {
--- 128,138 ----
  bool KlassCleaningTask::claim_clean_klass_tree_task() {
    if (_clean_klass_tree_claimed) {
      return false;
    }
  
!   return Atomic::cmpxchg(&_clean_klass_tree_claimed, 0, 1) == 0;
  }
  
  InstanceKlass* KlassCleaningTask::claim_next_klass() {
    Klass* klass;
    do {