RFR: 8146409: TestPromotionFailedEventWithParallelScavenge.java failed with assert(_time_stamps != __null) failed: Sanity

[David Lindholm]

Hi,

Please review the following patch that fixes 8146409. Since _time_stamps 
is now lazily allocated we need to check that it is != null in 
GCTaskThread::print_task_time_stamps() instead of asserting.

Bug: https://bugs.openjdk.java.net/browse/JDK-8146409
Webrev: http://cr.openjdk.java.net/~david/JDK-8146409/webrev.00/


Thanks,
David