RFR: JDK-8284726: Print active locale settings in hs_err reports and in VM.info

[David Holmes]

On Tue, 26 Apr 2022 11:51:40 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> src/hotspot/os/posix/os_posix.cpp line 575:
>> 
>>> 573:     const char* locale = setlocale(categories[i].c, NULL);
>>> 574:     st->print_cr("%s=%s", categories[i].name,
>>> 575:                  ((locale != NULL) ? locale : ""));
>> 
>> I can't see where the query version of setLocale is allowed to return NULL, but if it did isn't that different to being set to "" ?
>
> "The return value is NULL if the request cannot be honored." linux manpage.
> I can print "??" instead?

The Linux manpage is even more vague than the Posix spec. :(

I'd prefer "<null>" or "<not-set>" or "<unknown>" to just "??".

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PR: https://git.openjdk.java.net/jdk/pull/8194