RFR(XS): 8053995: Add method to WhiteBox to get vm pagesize.

[Yumin Qi]

Please review

bugs: https://bugs.openjdk.java.net/browse/JDK-8053995
webrev: http://cr.openjdk.java.net/~minqi/8053995/webrev01/

Now the API usage is in internal test case, see separate email for the 
webrev.

It is same as previous version (webrev00).

Thanks
Yumin

On 7/31/14, 3:29 PM, Yumin Qi wrote:
> Please review:
>
> http://cr.openjdk.java.net/~minqi/8053995/webrev00/
>
> Summary: Currently there is no java API to get underlying OS native VM 
> page size unless using Unsafe which is not recommended.  The new added 
> method to WhiteBox can read this property and used in test.
>
>
> Tests: JPRT and  jtreg.
>
> Thanks
> Yumin