RFR: 8352088: Call of com.sun.jdi.ThreadReference.threadGroups() can lock up target VM [v6]

[Jaikiran Pai]

On Fri, 28 Mar 2025 21:02:21 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> Calling ThreadGroupReference.groups() from an event handler can cause a deadlock. Details in first comment. Tested with :jdk_lang on all supported platforms and tier1, tier2, tier3, and tier5 svc testing.
>
> Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:
> 
>   undo change that wasn't suppose to be committed.

Still looks good.

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Marked as reviewed by jpai (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24236#pullrequestreview-2727249815