RFR (XXS): 8016740 HS23/24: assert in GC_locker from PSOldGen::expand with -XX:+PrintGCDetails and Verbose (backport)

[Thomas Schatzl]

Hi all,

  can I have quick reviews for this backport to hs24 of a hs25 fix?

The change is about a wrong predicate in an assert.

The original change (1 line change) applied cleanly except for slightly
different line numbers.

Webrev
http://cr.openjdk.java.net/~tschatzl/8016740/webrev/

Webrev of hs25 change:
http://cr.openjdk.java.net/~tschatzl/8005857/webrev/

JIRA
https://jbs.oracle.com/bugs/browse/JDK-8016740
(Original: https://jbs.oracle.com/bugs/browse/JDK-8005857 )

Bugs.sun.com
http://bugs.sun.com/view_bug.do?bug_id=8016740

Testing:
jprt, manual testing

Note that the original change did not have a regression test, so I did
not add one here. I opened CR 8016752 to add a test case that will
eventually trickle down to hs24.

Thanks,
Thomas