src/hotspot/share/oops/instanceKlass.cpp

*** 2198,2208 ****
        // Use load_acquire due to competing with inserts
        Klass* impl = Atomic::load_acquire(adr_implementor());
        if (impl != NULL && !impl->is_loader_alive()) {
          // NULL this field, might be an unloaded klass or NULL
          Klass* volatile* klass = adr_implementor();
!         if (Atomic::cmpxchg((Klass*)NULL, klass, impl) == impl) {
            // Successfully unlinking implementor.
            if (log_is_enabled(Trace, class, unload)) {
              ResourceMark rm;
              log_trace(class, unload)("unlinking class (implementor): %s", impl->external_name());
            }
--- 2198,2208 ----
        // Use load_acquire due to competing with inserts
        Klass* impl = Atomic::load_acquire(adr_implementor());
        if (impl != NULL && !impl->is_loader_alive()) {
          // NULL this field, might be an unloaded klass or NULL
          Klass* volatile* klass = adr_implementor();
!         if (Atomic::cmpxchg(klass, impl, (Klass*)NULL) == impl) {
            // Successfully unlinking implementor.
            if (log_is_enabled(Trace, class, unload)) {
              ResourceMark rm;
              log_trace(class, unload)("unlinking class (implementor): %s", impl->external_name());
            }