RFR(XXS) 8210879: ClassLoaderStatsClosure does raw oop comparison

[Zhengyu Gu]

Hi,

Please review this small change.

GCs, such as Shenandoah, need proper barrier for oop comparison.


Bug: https://bugs.openjdk.java.net/browse/JDK-8210879
Webrev: http://cr.openjdk.java.net/~zgu/8210879/webrev.00/


Test:

   hotspot_gc on Linux x64 (fastdebug and release)


Thanks,

-Zhengyu