RFR: 8192154 - JVM crashes inside some chroot environments on linux

[Severin Gehwolf]

On Wed, 2017-11-29 at 16:43 -0500, Bob Vandette wrote:
> Please review this robustness fix to the Container support recently added to Hotspot.
> 
> BUG:
> https://bugs.openjdk.java.net/browse/JDK-8192154
> 
> WEBREV:
> http://cr.openjdk.java.net/~bobv/8192154/webrev/
> 
> In the event that there is a partial setup of the cgroup subsystems, it’s
> possible that the VM will crash.
> 
> The change moves NULL checking earlier in the scanning of the cgroup subsystems.
> 
> Tested with jtreg container tests and Mach5.

This looks fine to me. I'm not a Reviewer.

Thanks,
Severin