RFR: 8342818: Implement JEP 509: JFR CPU-Time Profiling [v25]

[Markus Grönlund]

On Tue, 27 May 2025 11:58:22 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

>> src/hotspot/share/jfr/periodic/sampling/jfrSampleRequest.cpp line 174:
>> 
>>> 172:   assert(request._sample_pc != nullptr, "invariant");
>>> 173:   assert(jt != nullptr, "invariant");
>>> 174:   assert(jt->thread_state() == _thread_in_Java, "invariant");
>> 
>> What?
>
> I also call this method for native stack traces in my implementation. As I have to walk native stack traces at stackwalks.

Assert for thread->state() == _thread_in_native then.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25302#discussion_r2117674370