[jdk17u-dev] RFR: 8306929: Avoid CleanClassLoaderDataMetaspaces safepoints when previous versions are shared

[Aleksey Shipilev]

On Fri, 2 Aug 2024 13:20:38 GMT, Oli Gillespie <ogillespie at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [408cec51](https://github.com/openjdk/jdk/commit/408cec516bb5fd82fb6dcddeee934ac0c5ecffaf) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Stefan Johansson on 4 May 2023 and was reviewed by Coleen Phillimore and Serguei Spitsyn.
> 
> It's clean except for the surrounding context changing between NULL and nullptr which was trivial to resolve. It comes with its own test, but I also confirmed that it fixes the reproducer shared on the issue.
> 
> Thanks!

This looks fine. I don't see any follow-up bugs for this change, but please run `all` tests to see if there is any trouble.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk17u-dev/pull/2776#pullrequestreview-2215749869