[jdk25] RFR: 8361952: Installation of MethodData::extra_data_lock() misses synchronization on reader side

[Christian Hagedorn]

On Tue, 15 Jul 2025 18:06:19 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [272e66d0](https://github.com/openjdk/jdk/commit/272e66d017a3497d9af4df6f042c741ad8a59dd6) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Thomas Schatzl on 14 Jul 2025 and was reviewed by Aleksey Shipilev, Coleen Phillimore and David Holmes.
> 
> Thanks!

Looks good!

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Marked as reviewed by chagedorn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26326#pullrequestreview-3023350771