RFR: 8338883: Add core dump info to -Xlog:os=info [v2]

[Gerard Ziemski]

On Wed, 28 Aug 2024 20:04:32 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> We add a small feature, which adds core dump info, which till now was only printed as part of hs_err log file, directly to stdout, when desired using log mechanism, i.e. `-Xlog:os=info`
>> 
>> For example, if we see:
>> 
>> `core dump info: core.28283`
>> 
>> we know all is set up correctly and we can expect a core file if java process crashes. If we see:
>> 
>> `core dump info: Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again`
>> 
>> instead, however, we know that "ulimit -c unlimited" needs to be set.
>> 
>> Testing: 
>> - passes `"MACH5 runtime/ErrorHandling/CreateCoredumpOnCrash.java"`
>> - full MACH5 test in progress...
>
> Gerard Ziemski has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - copyright year
>  - refactor core dump check code and separate checking from creating core file

@tstuefe Can you please take a look?

I adopted the name you suggested (back in 2015) and made changes to make both POSIX and Windows impl be more alike.

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PR Comment: https://git.openjdk.org/jdk/pull/20734#issuecomment-2338941610