RFR: 8062247: Allow WhiteBox test to access JVM offsets

[Mikhailo Seledtsov]

Thank you for explanation.

Misha

On 10/28/2014 9:42 AM, Yumin Qi wrote:
> Misha,
>
>   Thanks. The state transition is needed, we are in vm state, will 
> call JNI, that is native state, or the assertion will tell us that.
>
> Yumin
>
> On 10/28/2014 9:32 AM, Mikhailo Seledtsov wrote:
>> Hi Yumin,
>>
>>  The code looks good to me.
>> One minor comment: could you add explanation comment why we are using 
>> "ThreadToNativeFromVM ttnfv(thread);"? (no need for reposting webrev).
>>
>> Thank you,
>> Misha
>>
>> 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
>>
>