[crac] RFR: Report checkpoint processing to jcmd [v31]

[Anton Kozlov]

On Thu, 3 Nov 2022 15:52:26 GMT, Ilarion Nakonechnyy <inakonechnyy at openjdk.org> wrote:

>> pass output stream from diagnosticCommand.cpp through java code into os_linux.cpp::VM_crac::doit()
>
> Ilarion Nakonechnyy has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Style fix

I've played with the most recent version of this change and it works as expected 👍 

Interesting that VM messages go to the jcmd stream, and probably we may want Resource to be able to log to that stream as well. It may be a follow-up for this change.

BTW, have you found the reason the submit test has failed?

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PR: https://git.openjdk.org/crac/pull/10