RFR: JDK-8077414 PSPromotionLAB _state is unintialized

[Jon Masamitsu]

Eric,

A bit of an idle question here.  Do you think that LabState (and hence 
_state)
is needed?  As opposed to using the values of bottom, top, and end to
to infer the state of the plab?  "I don't know" is a good enough answer
and then I can go look if I am feeling energetic.

Thanks.

Jon

PS.  Changes look good.

On 4/10/2015 6:38 AM, Eric Caspole wrote:
> While working on another bug I noticed that PSPromotionLAB field 
> _state is uninitialized, and since I was staring at this code I 
> wondered if this was part of the problem. I don't think so but I would 
> like to initialize it so no one wonders in the future. I initialize it 
> to "zero_size" since it is otherwise filled in with NULL ptrs.
>
> Bug:
>  https://bugs.openjdk.java.net/browse/JDK-8077414
>
> Webrev:
>  http://cr.openjdk.java.net/~ecaspole/JDK-8077414/00/webrev/
>
> Passes JPRT.
> Thanks,
> Eric
>