8357550: GenShen crashes during freeze: assert(!chunk->requires_barriers()) failed

[earthling-amzn]

This is a low risk change that addresses an assertion failure when Shenandoah's generational mode is used with virtual threads.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8357550: GenShen crashes during freeze: assert(!chunk->requires_barriers()) failed (Bug - P3)

Reviewers

• Aleksey Shipilev (@shipilev - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/25918/head:pull/25918
$ git checkout pull/25918

Update a local copy of the PR:
$ git checkout pull/25918
$ git pull https://git.openjdk.org/jdk.git pull/25918/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 25918

View PR using the GUI difftool:
$ git pr show -t 25918

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/25918.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back wkemper! A progress list of the required criteria for merging this PR into jdk25 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:

8357550: GenShen crashes during freeze: assert(!chunk->requires_barriers()) failed

Reviewed-by: shade

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

At the time when this comment was updated there had been 1 new commit pushed to the jdk25 branch:

• 79a85df: 8353950: Clipboard interaction on Windows is unstable

Please see this link for an up-to-date comparison between the source branch of this pull request and the jdk25 branch.
As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the jdk25 branch, type /integrate in a new comment.

[openjdk]

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

[openjdk]

@earthling-amzn The following labels will be automatically applied to this pull request:

• hotspot-gc
• shenandoah

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing lists. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (cd1d8a1e)

[shipilev]

Looks fine for RDP1.

[earthling-amzn]

/integrate

[openjdk]

Going to push as commit 636b563.
Since your change was applied there have been 4 commits pushed to the jdk25 branch:

• fe9efb7: 8358526: Clarify behavior of java.awt.HeadlessException constructed with no-args
• ca6b165: 8359895: JFR: method-timing view doesn't work
• d5aa225: 8359242: JFR: Missing help text for method trace and timing
• ... and 1 more: https://git.openjdk.org/jdk/compare/41928aed7dce0cc15be95f1552e6d62c18e9eea1...jdk25

Your commit was automatically rebased without conflicts.

[openjdk]

@earthling-amzn Pushed as commit 636b563.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.