RFR: 8062247: Allow WhiteBox test to access JVM offsets

[Yumin Qi]

Please review the new changeset at same location.
New API supply an interface to get data member offset by it's name.
http://cr.openjdk.java.net/~minqi/8062247/webrev00/

Thanks
Yumin

On 10/27/2014 9:01 PM, Yumin Qi wrote:
> Please review
>
> bug: https://bugs.openjdk.java.net/browse/JDK-8062247
> webrev: http://cr.openjdk.java.net/~minqi/8062247/webrev00/
>
> Summary: Internal test failed since the variable offsets changed in 
> hotspot. The way to get offset in the test is hard-coded. To reduce 
> the risk of future changes of hotspot offsets, the fix add a WhiteBox 
> API function to get a map for FileMapHeaderInfo, which return the 
> members' offsets in a Hashtable.
>
> Tests: JPRT, jtreg.
>
> Thanks
> Yumin