RFR: 8304725: AsyncGetCallTrace can cause SIGBUS on M1 [v3]

[Thomas Stuefe]

On Thu, 23 Mar 2023 12:00:33 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

> > In particular, we do not know if AGCT did interrupt the crashing thread recently. Or do we? This would be valuable information.
> 
> Yes. But it could indeed be helpful information when debugging problems. Please don't forget that JFR has a very similar code, and it would be good to have the information on whether JFR sampled a thread recently too.

Yes, but while JFR interrupts threads too, its sampler runs in its own thread, so the async-safety of the interrupted code should not matter, or?

wrt info, just a little marker in the thread "AGCT was here", maybe with a timestamp, would be useful.

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PR Comment: https://git.openjdk.org/jdk/pull/13144#issuecomment-1481130844