RFR (XS) 8025550 valgrind: Conditional jump depends on uninitialised value in Arena::set_size_in_bytes()

[Zhengyu Gu]

Thanks for the review.

-Zhengyu

On Mar 11, 2014, at 10:42 AM, Coleen Phillimore wrote:

> 
> This looks good.  Sorry for the delay, especially since the change is simple.
> Coleen
> 
> On 2/25/14 12:43 PM, Zhengyu Gu wrote:
>> This is a simple fix to NMT, which can mis-count arena size due to uninitialized  value. In rare case, if uninitialized size happens to be the same value as arena's initial size, NMT will mis-count the size, since NMT only updates size when the new size does not equal to the old one.
>> 
>> 
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8025550
>> Webrev:  http://cr.openjdk.java.net/~zgu/8025550/webrev.00/
>> 
>> Thanks,
>> 
>> -Zhengyu
>