RFR (S): 8180280: [TESTBUG] Test for JDK-8180048

[Kim Barrett]

> On Nov 27, 2017, at 7:53 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Hi all,
> 
>  can I have some reviews that adds a test for JDK-8180048? That test
> has not been completed in time for JDK 9, but I think it is good to
> have it in JDK 10.
> 
> It tries to detect the races fixed in JDK-8180048 by parsing NMT output
> before/after symbol unloading. To be sure that we exercise the buggy
> code path, the test takes some time (~30s) to stress symbol unloading.
> 
> To avoid this test clogging up valuable time in lower testing tiers,
> the test has been put into the "stress" test directory so that it only
> executes at higher test tiers. Further I limited it to execute only
> with a release build.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8180280
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8180280/webrev
> Testing:
> test case passing
> 
> Thanks,
>  Thomas

Looks good.