RFR: (S) 8050464: G1 string deduplication tests hang/timeout and leave running processes consuming all resources

[Dmitry Fazunenko]

Hi,

Would you please look at the simple fix of String Deduplication tests.

Description:

When string deduplication has happened /s1.equals(s2)/  will be 
equivalent to /s1 == s2/
Deduplication is performed in a separate thread so it could be delayed a 
bit.
Tests are away about possible delay and give another chance if 
deduplication hasn't
happened by the moment of check.
But tests wait for deduplication in infinitive loop, so if deduplication 
doesn't work the tests
will timeout, leaving hanging VM after. Which is not very elegant.

The fix is simple: replace infinitive loops with limited ones and report 
failure.
The logic of the tests hasn't changed.

http://cr.openjdk.java.net/~dfazunen/8050464/webrev.01/
https://bugs.openjdk.java.net/browse/JDK-8050464

Any comments are welcome.

Thanks,
Dima



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