RFR (S): JDK-8058801: G1TraceReclaimDeadHumongousObjectsAtYoungGC only prints humongous object liveness output when there is at least one candidate humongous object

[Sangheon Kim]

Hi all,

can I have reviews for the following small change to print humongous 
objects information
even though there's no candidates for humongous object?

Main changes are:
1) Not to skip humongous reclaim phase if 
'G1TraceReclaimDeadHumongousObjectsAtYoungGC' is set.
2) Changed to print humongous object size.
3) Added jtreg test case to test whether it prints Humongous object 
information correctly or not.

Please ignore wrong test log(line:56, 80) at 
TestG1TraceReclaimDeadHumongousObjectsAtYoungGC.java

CR:
https://bugs.openjdk.java.net/browse/JDK-8058801

Webrev:

http://cr.openjdk.java.net/~tschatzl/8058801-kim/webrev/  


Testing: jprt

Thanks,
Sangheon








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