Date: Wed, 26 Mar 1997 11:27:01 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: jkh@time.cdrom.com (Jordan K. Hubbard) Cc: terry@lambert.org, drussell@saturn-tech.com, freebsd-current@freebsd.org Subject: Re: SIGTERMs killing X Message-ID: <199703261827.LAA28346@phaeton.artisoft.com> In-Reply-To: <2530.859359039@time.cdrom.com> from "Jordan K. Hubbard" at Mar 25, 97 10:50:39 pm
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> In this case, Terry's pigeon was SIGABRT, which is not the same as the
> SIGKILL which FreeBSD delivers to a process which has generated an
> out-of-VM condition. But for a mere delta of 3 in the signal number,
> Terry might have been correct. :-) As it is, he's entirely on the
> wrong track yet again. The SIGABRT must be something which is caught
> internally by the server, perhaps in response to a NULL pointer
> reference or malloc() returning zero (which could be bogus limit
> values just as easily as anything else). More than this without
> knowing more about the user's configuration, it's difficult to say.
That would be a bus error, not an abort.
>
> > What it means is that your VM space for your process has been
> > destroyed (you can see this by looking in /sys/kern/kern_exec.c).
>
> Erm, you can? :-)
>
> You're not looking at the exec_fail case by mistake, are you?
-------------------------------------------------------------------------
exec_fail:
if (imgp->vmspace_destroyed) {
/* sorry, no more process anymore. exit gracefully */
exit1(p, W_EXITCODE(0, SIGABRT));
/* NOT REACHED */
return(0);
} else {
-------------------------------------------------------------------------
Hmmm... perhaps. So are you going to change the comment so that
it implies what you said instead of implying what I said?
"no process anymore" implies there was a process and that it is no more,
not that a process never was.
PS: I'd be interested to see *anywhere* else in the kernel where the
SIGABRT signal is sent. I've grepped the sources, and the only place
is there, in the kern_exec.c.
Regards,
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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