RFR: 8214782: Add missing access barriers on CLD handle area

[Erik Österlund]

Hi Per,

Looks good.

Thanks,
/Erik

On 2018-12-04 13:48, Per Liden wrote:
> The CLD handle area contains raw oops. Those oops should be manipulated 
> using NativeAccess barriers. Two such barriers are currently missing.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8214782
> Webrev: http://cr.openjdk.java.net/~pliden/8214782/webrev.0
> 
> /Per