RFR (S) 8250589: Move Universe::_reference_pending_list into OopHandle

[Erik Österlund]

Looks good.

Thanks,
/Erik

On 2020-07-27 15:05, coleen.phillimore at oracle.com wrote:
> Summary: Use synchronization to reference the _reference_pending_list 
> with OopHandle
>
> Tested with tier1-6 with 100% passed (no other existing test failures!)
>
> open webrev at http://cr.openjdk.java.net/~coleenp/2020/8250589.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8250589
>
> Thanks,
> Coleen