RFR: Verify liveness data

[Aleksey Shipilev]

On 08/07/2017 03:49 PM, Zhengyu Gu wrote:
> 1) ShenandoahLivenessData* _ld; -> volatile ShenandoahLivenessData* _ld;
> 
> 2) shenandoahVerifier.cpp
>  251           Atomic::add(obj->size() + BrooksPointer::word_size(), _ld + obj_reg->region_number());
> 
>  ->  251           Atomic::add(obj->size() + BrooksPointer::word_size(),
> _ld[obj_reg->region_number()]);

Fixed both.

It seems to me that volatility is required in ShenandoahLivenessData definition itself:
  http://cr.openjdk.java.net/~shade/shenandoah/verifier-liveness/webrev.02/

Thanks,
-Aleksey