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

[earthling-amzn]

This is a low risk change that fixes an assertion failure with Shenandoah's generational mode and virtual threads. Only Shenandoah's generational mode is affected by this change.

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8357550 needs maintainer approval

Issue

• JDK-8357550: GenShen crashes during freeze: assert(!chunk->requires_barriers()) failed (Bug - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk24u.git pull/234/head:pull/234
$ git checkout pull/234

Update a local copy of the PR:
$ git checkout pull/234
$ git pull https://git.openjdk.org/jdk24u.git pull/234/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 234

View PR using the GUI difftool:
$ git pr show -t 234

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk24u/pull/234.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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

[openjdk]

⚠️ @earthling-amzn This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (850c23df)