RFR: 8352251: Implement Cooperative JFR Sampling [v14]

Wed Apr 30 13:53:49 UTC 2025

On Tue, 29 Apr 2025 09:17:40 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

> Can we let _last_sender_Java_fp be a state field that can be tested?

That is possible, but I don't see any effect. All JFR tests are already passing without that. Should `process_sender_Java_fp` be ever called on platforms which always have a valid Back Chain? I don't see anything which needs to be done for PPC64.
We could return nullptr in `last_sender_Java_fp()`. The tests still pass with that.

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PR Comment: https://git.openjdk.org/jdk/pull/24296#issuecomment-2842060679