From: Eli Zaretskii <eliz@gnu.org>
To: Gregor Zattler <telegraph@gmx.net>
Cc: 74831@debbugs.gnu.org
Subject: bug#74831: 31.0.50; scratch/igc: segfaults on startup when called under gdb
Date: Thu, 12 Dec 2024 16:53:13 +0200 [thread overview]
Message-ID: <86jzc5ymue.fsf@gnu.org> (raw)
In-Reply-To: <87ikrp3rl3.fsf@no.lan> (bug-gnu-emacs@gnu.org)
> Date: Thu, 12 Dec 2024 15:26:32 +0100
> From: Gregor Zattler via "Bug reports for GNU Emacs,
> the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000555555779816 in XSETCDR (c=..., n=n@entry=...) at ./src/lisp.h:1605
> 1605 *xcdr_addr (c) = n;
So what is the value of xcdr_addr(s) here? It looks like
dereferencing it causes the segfault, so its value might give us some
hints.
Also, where did you start GDB? It looks like you started it not from
the Emacs' src/ directory, in which case please say
(gdb) source /path/to/emacs/src/.gdbinit
before running Emacs. That's because the MPS library uses SIGSEGV for
its memory barriers, and .gdbinit there makes sure such SIGSEGVs don't
stop Emacs. IOW, this could be a false positive, not a real segfault.
next prev parent reply other threads:[~2024-12-12 14:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-12 14:26 bug#74831: 31.0.50; scratch/igc: segfaults on startup when called under gdb Gregor Zattler via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-12-12 14:53 ` Eli Zaretskii [this message]
2024-12-12 16:15 ` Gregor Zattler via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-12-12 16:43 ` Eli Zaretskii
2024-12-12 16:53 ` Gregor Zattler via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-12-12 18:56 ` Eli Zaretskii
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