RFR: 8267185: Add string deduplication support to ParallelGC [v4]

[Ivan Walulya]

On Fri, 20 Aug 2021 06:05:34 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   albertnetymk review
>
> src/hotspot/share/gc/parallel/psStringDedup.hpp line 39:
> 
>> 37:   // If to is young then age should be the new (survivor's) age.
>> 38:   // if to is old then age should be the age of the copied from object.
>> 39:   static bool is_candidate_from_evacuation(oop obj,
> 
> This comment was just copied from G1 and isn't right for this implementation.

Leftover from an earlier version, fixed.

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PR: https://git.openjdk.java.net/jdk/pull/5085