src/hotspot/share/gc/g1/g1CollectedHeap.cpp

*** 3620,3630 ****
  
  Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock", false, Monitor::_safepoint_check_never);
  
  class G1KlassCleaningTask : public StackObj {
    BoolObjectClosure*                      _is_alive;
!   volatile jint                           _clean_klass_tree_claimed;
    ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator;
  
   public:
    G1KlassCleaningTask(BoolObjectClosure* is_alive) :
        _is_alive(is_alive),
--- 3620,3630 ----
  
  Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock", false, Monitor::_safepoint_check_never);
  
  class G1KlassCleaningTask : public StackObj {
    BoolObjectClosure*                      _is_alive;
!   volatile int                            _clean_klass_tree_claimed;
    ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator;
  
   public:
    G1KlassCleaningTask(BoolObjectClosure* is_alive) :
        _is_alive(is_alive),
*** 3636,3646 ****
    bool claim_clean_klass_tree_task() {
      if (_clean_klass_tree_claimed) {
        return false;
      }
  
!     return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0;
    }
  
    InstanceKlass* claim_next_klass() {
      Klass* klass;
      do {
--- 3636,3646 ----
    bool claim_clean_klass_tree_task() {
      if (_clean_klass_tree_claimed) {
        return false;
      }
  
!     return Atomic::cmpxchg(1, &_clean_klass_tree_claimed, 0) == 0;
    }
  
    InstanceKlass* claim_next_klass() {
      Klass* klass;
      do {
*** 3673,3692 ****
    }
  };
  
  class G1ResolvedMethodCleaningTask : public StackObj {
    BoolObjectClosure* _is_alive;
!   volatile jint      _resolved_method_task_claimed;
  public:
    G1ResolvedMethodCleaningTask(BoolObjectClosure* is_alive) :
        _is_alive(is_alive), _resolved_method_task_claimed(0) {}
  
    bool claim_resolved_method_task() {
      if (_resolved_method_task_claimed) {
        return false;
      }
!     return Atomic::cmpxchg(1, (jint*)&_resolved_method_task_claimed, 0) == 0;
    }
  
    // These aren't big, one thread can do it all.
    void work() {
      if (claim_resolved_method_task()) {
--- 3673,3692 ----
    }
  };
  
  class G1ResolvedMethodCleaningTask : public StackObj {
    BoolObjectClosure* _is_alive;
!   volatile int       _resolved_method_task_claimed;
  public:
    G1ResolvedMethodCleaningTask(BoolObjectClosure* is_alive) :
        _is_alive(is_alive), _resolved_method_task_claimed(0) {}
  
    bool claim_resolved_method_task() {
      if (_resolved_method_task_claimed) {
        return false;
      }
!     return Atomic::cmpxchg(1, &_resolved_method_task_claimed, 0) == 0;
    }
  
    // These aren't big, one thread can do it all.
    void work() {
      if (claim_resolved_method_task()) {