RFR: 8255019: Shenandoah: Split STW and concurrent mark into separate classes [v27]

[Zhengyu Gu]

On Mon, 11 Jan 2021 17:42:08 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Zhengyu Gu has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 34 commits:
>> 
>>  - Merge branch 'master' into JDK-8255019-sh-mark
>>  - Silent MacOSX build
>>  - @shade's comments
>>  - Merge
>>  - Update copyright years
>>  - Merge
>>  - Merge branch 'master' into JDK-8255019-sh-mark
>>  - Concurrent mark does not expect forwarded objects
>>  - Merge branch 'master' into JDK-8255019-sh-mark
>>  - Merge branch 'master' into JDK-8255019-sh-mark
>>  - ... and 24 more: https://git.openjdk.java.net/jdk/compare/4d3d5991...a6540b99
>
> Changes requested by shade (Reviewer).

@shade, did I address all your concerns? Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/1009