RFR: 8222667: vmTestbase/nsk/jdi/ThreadStartRequest/addThreadFilter/addthreadfilter002/TestDescription.java failed with "event IS NOT a breakpoint"

[Gary Adams]

It would be good to include a comment that the thread start is being 
allowed because of graal.

Now that we have a series of graal specific alterations in the tests,
it might be useful to provide some reusable filters. $.02

On 5/1/19, 9:07 PM, Daniil Titov wrote:
> Please review the change that fixes the test that intermittently fails with Graal on.
>
> The test tests  addThreadFilter() method for com.sun.jdi.ThreadStartRequest class. It starts a debuggee, creates ThreadStartRequest, enables it, and calls addThreadFilter(). The test also uses breakpoints to synchronize with the debuggee,  but the problem here is that while waiting for a breakpoint event, occasionally, when Graal is on, the event the test receives is a ThreadStartEvent for " HotSpotGraalManagement Bean Registration" thread, rather than a breakpoint event. The test doesn't expect it and fails.
>
> The fix takes this into account and makes the test keep waiting for a breakpoint event instead of failing.
>
> Webrev:http://cr.openjdk.java.net/~dtitov/8222667/webrev.01/
> Bug:https://bugs.openjdk.java.net/browse/JDK-8222667
>
> Thanks!
> --Daniil
>
>