RFR: 8062247: Allow WhiteBox test to access JVM offsets

[Mikhailo Seledtsov]

Hi Yumin,

  The name getOffsets() seems too generic. Perhaps, we could rename it 
to be more specific to the task.

Thank you,
Misha

On 10/29/2014 5:46 PM, Yumin Qi wrote:
> 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
>