RFR: 8193065: [TESTBUG]GCSharedStringsDuringDump.java: Exception in thread "main" java.lang.RuntimeException: String is not shared.

[Jiangli Zhou]

Please review the following test fix that detects missing ‘oa region’ as a failure when there are extra allocations/GCs during CDS dump time. When failures are detected, a larger heap size is used for dumping. Please see more detailed analysis in the bug report.

webrev: http://cr.openjdk.java.net/~jiangli/8193065/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8193065?filter=14921 <https://bugs.openjdk.java.net/browse/JDK-8193065?filter=14921>

Testing with hs tier1, tier2 and tier7.

Thanks,
Jiangli