RFR (S) CR 8023638: Add the regression test for 8006997

[Coleen Phillimore]

This looks good.
Thanks,
Coleen

On 8/23/2013 7:24 AM, Aleksey Shipilev wrote:
> Hi,
>
> The latest bug scrub identified one of the issues lacking the regression
> test, where it does make sense to create one.
>
> Background: -XX:ContendedPaddingWidth=# is range-checked on VM side to
> be in [0; 8192], plus being the multiple of 8. The test checks multiple
> values around the failure point.
>
> Here's the webrev:
>    http://cr.openjdk.java.net/~shade/8023638/webrev.00/
>
> Testing:
>    - this test is trivial, and excersises the common code path in VM,
> hence only Linux x86_64/release was tested.
>
> Please review!
>
> Thanks,
> -Aleksey.