The method TestLib.Child.sendStopXXX doesn't check that the STOP signal was delivered (which is why it was re-named from assertSendStop - having assert in the name does imply that it asserts something!). The method needs to, somehow or other confirm signal delivery as otherwize there's a race between sending that signal and any follow-on testing relying on the signal being delivered. Also, I assume this only works on detached threads.
Fixed. January 12, 2007 frysk-core/frysk/proc/CL * TestProcStopped.java (stopped): Updated name change from sendStopXXX to assertSendStop. * TestLib.java (AckProcess.assertSendStop): Renamed from sendStopXXX. Now ensures that the process is in state 'T'. Bug #3473