RFR: 8272147: Consolidate preserved marks handling with other STW collectors [v4]

[Guoxiong Li]

On Wed, 7 Jun 2023 20:18:35 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Guoxiong Li has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add and use 'adjust_preserved_mark'
>
> src/hotspot/share/gc/shared/preservedMarks.hpp line 37:
> 
>> 35: class WorkerThreads;
>> 36: 
>> 37: class OopAndMarkWord {
> 
> Now that this class is in public domain, I tend to think it should be renamed to `PreservedMark` to be consistent with other classes in this file. (Ofc, this is quite subjective.)

Renamed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/14274#discussion_r1223092687