RFR: 8352251: Implement Cooperative JFR Sampling [v12]

[Martin Doerr]

On Sun, 27 Apr 2025 16:42:08 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

> Hope this will make things easier for you, Martin.
> 
> [push back pd constants into pd code](https://github.com/openjdk/jdk/pull/24296/commits/ed57ed9f327729939d6d57108b01ad3972aa0488)
> 
> Thanks Markus

Thanks a lot! This looks like a much nicer and more generic frame interface. I need to dig through the details, yet.
Would `frame_link` be better name than just `link`? Also some comments would be nice because I find it hard to understand e.g. the difference between fp, sender_sp and link.

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PR Comment: https://git.openjdk.org/jdk/pull/24296#issuecomment-2835720584