8355569: Some nsk/jdi tests can glean the "main" thread by using the ClassPrepareEvent for the debuggee main class

[GoeLin]

I backport this to keep the tests up to date and make later backports clean.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8355569 needs maintainer approval

Issue

• JDK-8355569: Some nsk/jdi tests can glean the "main" thread by using the ClassPrepareEvent for the debuggee main class (Enhancement - P4 - Approved)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/2406/head:pull/2406
$ git checkout pull/2406

Update a local copy of the PR:
$ git checkout pull/2406
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/2406/head

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Checkout this PR locally:
$ git pr checkout 2406

View PR using the GUI difftool:
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Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/2406.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back goetz! A progress list of the required criteria for merging this PR into pr/2404 will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@GoeLin 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:

8355569: Some nsk/jdi tests can glean the "main" thread by using the ClassPrepareEvent for the debuggee main class

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

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[openjdk]

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

[mlbridge]

Webrevs

• 02: Full - Incremental (0665c39b)
• 01: Full - Incremental (2c5b571c)
• 00: Full (c8bcdf22)

[openjdk]

@GoeLin Please do not rebase or force-push to an active PR as it invalidates existing review comments. Note for future reference, the bots always squash all changes into a single commit automatically as part of the integration. See OpenJDK Developers’ Guide for more information.

[GoeLin]

/integrate

[openjdk]

@GoeLin This pull request has not yet been marked as ready for integration.

[GoeLin]

/integrate

[openjdk]

Going to push as commit 799b63a.

[openjdk]

@GoeLin Pushed as commit 799b63a.

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