RFR: Cleanup and strengthen BrooksPointer verification

[Zhengyu Gu]

Good to me.

-Zhengyu

On 02/12/2018 09:31 AM, Aleksey Shipilev wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/brooks-verify/webrev.01/
> 
> This is the first salvo in verification refactoring: make sure we are verifying the cases where
> fwdptr is NULL, and do not verify when fwdptr had failed to install with CAS. Also, protect from
> accidental calls to verification in release bits.
> 
> Testing: hotspot_gc_shenandoah {fastdebug|release}
> 
> Thanks,
> -Aleksey
>