RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v26]

[Johannes Bechberger]

On Mon, 2 Jun 2025 08:44:01 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> src/hotspot/share/jfr/periodic/sampling/jfrCPUTimeThreadSampler.cpp line 367:
>> 
>>> 365:     JfrCPUTimeSampleRequest& request = queue.at(i);
>>> 366:     JfrStackTrace stacktrace;
>>> 367:     traceid tid = JfrThreadLocal::thread_id(thread);
>> 
>> Check the tid as a function of the JfrSampleRequest, like we do in JFR Cooperative Sampling.
>
> You mean ` const traceid tid = in_continuation ? tl->vthread_id_with_epoch_update(jt) : JfrThreadLocal::jvm_thread_id(jt);`?

I implemented this in this function now.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2120473792