RFR: 8342818: Implement CPU Time Profiling for JFR [v43]

Tue Apr 29 12:23:01 UTC 2025

On Tue, 29 Apr 2025 11:55:28 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> Most threads are blocking and waiting for a pending safepoint. But the JavaThread calling disenroll is stuck in this loop, waiting for 2037581315 active signal handlers.
>
> Thanks. I'll take a look tomorrow.

I probably found the issue: `_active_signal_handlers` is never set to zero.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20752#discussion_r2066203558