8329350: GenShen: Do not reset mark bitmaps on a safepoint

[earthling-amzn]

Clean backport

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8329350: GenShen: Do not reset mark bitmaps on a safepoint (Task - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/37/head:pull/37
$ git checkout pull/37

Update a local copy of the PR:
$ git checkout pull/37
$ git pull https://git.openjdk.org/shenandoah-jdk21u.git pull/37/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 37

View PR using the GUI difftool:
$ git pr show -t 37

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/shenandoah-jdk21u/pull/37.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back wkemper! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@earthling-amzn This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8329350: GenShen: Do not reset mark bitmaps on a safepoint

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

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➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (01ec5be3)

[earthling-amzn]

/integrate

[openjdk]

Going to push as commit a372217.

[openjdk]

@earthling-amzn Pushed as commit a372217.

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