RFR: 8204538: Split ScanClosure and ScanClosureWithParBarrier

[Erik Österlund]

Hi Stefan,

Looks good.

Thanks,
/Erik

On 2018-06-07 12:16, Stefan Karlsson wrote:
> Hi all,
>
> Please review this patch to change ScanClosureWithParBarrier to not 
> inherit from ScanClosure.
>
> http://cr.openjdk.java.net/~stefank/8204538/webrev.01/
> https://bugs.openjdk.java.net/browse/JDK-8204538
>
> ScanClosureWithParBarrier is the only ExtendedOopClosure sub class 
> that overrides the do_oop functions of a super class. This patch 
> cleans this up to pave the way for:
>
>  https://bugs.openjdk.java.net/browse/JDK-8204540 - Automatic oop 
> closure devirtualization
>
> thanks,
> StefanK