GNU bug report logs - #39118
3.0.0 JIT segfaults on 64-bit Cygwin

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Message #31 received at 39118 <at> debbugs.gnu.org (full text, mbox):

From: John Cowan <cowan <at> ccil.org>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: Andy Wingo <wingo <at> pobox.com>, 39118 <at> debbugs.gnu.org, guile-devel <at> gnu.org
Subject: Re: Segfault while building on 64-bit Cygwin
Date: Tue, 21 Jan 2020 16:37:01 -0500

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Thanks.  Unfortunately, the standard recipe for making core dumps on Mac
(put "limit core unlimited" into /etc/launchd.conf and reboot, make sure
/cores is writable, set ulimit -c unlimited) seem to actually enable them
on MacOS Catalina (10.15.2).  I have tested with SIGQUIT and SIGSEGV on
running processes and no dumps appear in /cores.

On Tue, Jan 21, 2020 at 4:02 AM Ludovic Courtès <ludo <at> gnu.org> wrote:

> Hello,
>
> John Cowan <cowan <at> ccil.org> skribis:
>
> > Yes, gladly, but I don't know how to get one in this context.
>
> You would unpack, configure, and build like you did before (with JIT
> enabled, so as to reproduce the crash), but before that you’d run
> “ulimit -c unlimited” in that shell to make sure there’s a core dumped
> when it crashes.
>
> Once it has crashed, locate the ‘core’ file (or ‘core.*’), and run, say:
>
>   gdb libguile/.libs/guile bootstrap/core
>
> Then from the GDB prompt:
>
>   thread apply all bt
>
> TIA,
> Ludo’.
>

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