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From: Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 47067@debbugs.gnu.org
Subject: bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c
Date: Sun, 14 Mar 2021 08:10:08 +0000	[thread overview]
Message-ID: <xjfa6r6nokf.fsf@sdf.org> (raw)
In-Reply-To: <83a6r6go38.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 14 Mar 2021 10:02:19 +0200")

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Andrea Corallo <akrl@sdf.org>
>> Cc: Eli Zaretskii <eliz@gnu.org>, 47067@debbugs.gnu.org
>> Date: Sun, 14 Mar 2021 07:19:17 +0000
>> 
>> Okay with a trunk gdb I'm able to debug...
>
> Yes, 8.2 is quite an old version.
>
>> Here is my backtrace for the suggested reproducer on my Emacs configured
>> with --with-wide-int --enable-checking=yes,glyphs and compiled with the
>> default `comp-debug' 0.
>
> Thanks.  However, your build is optimized, whereas mine isn't.  This
> has a significant effect on the backtrace (static functions are
> inlined and don't appear in the backtrace).  Please reconfigure with
> CFLAGS='-O0 -g3' (and the rest of the switches as you used them for
> this build), and show the backtrace after rebuilding.

Okay will rebuild and report this evening (have to leave the PC now).

> As I established earlier, in
>
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=47067#80
>   https://debbugs.gnu.org/cgi/bugreport.cgi?bug=47067#83
>
> the code which GDB fails to identify with any symbols calls Emacs
> primitives via freloc.link_table.  Where is the C source for this
> code?  If there is no C source, then how is that code generated?

There's no C source for that as this is generated by us from Lisp (Emacs
is acting as a GCC frontend).

We can anyway have libgccjit generate some pseudo C code to ease
debugging (see 'gcc_jit_context_dump_to_file' in [1] if you like).  We
trigger this compiling with `comp-debug' >= 1, in this case gdb should
let you step into the .eln following the dumped pseudo C code.

>> Emacs does not crash if then I continue and scroll through down through
>> in the file.
>
> And if you type "C-s sleep"?

Doesn't crash.

Thanks

  Andrea

[1] <https://gcc.gnu.org/onlinedocs/jit/topics/contexts.html>





  reply	other threads:[~2021-03-14  8:10 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-11 11:27 bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c Eli Zaretskii
2021-03-11 12:19 ` Eli Zaretskii
2021-03-11 14:07 ` Eli Zaretskii
2021-03-12  6:46 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12  8:10   ` Eli Zaretskii
2021-03-12 12:04     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 12:51       ` Eli Zaretskii
2021-03-12 15:27         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 15:50           ` Eli Zaretskii
2021-03-12 16:08             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 16:14               ` Eli Zaretskii
2021-03-12 19:30                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 19:48                   ` Eli Zaretskii
2021-03-12 20:21                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13  7:11                       ` Eli Zaretskii
2021-03-13 19:51                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 20:07                           ` Eli Zaretskii
2021-03-13 20:20                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:19                               ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:02                                 ` Eli Zaretskii
2021-03-14  8:10                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2021-03-14 19:29                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 19:48                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 16:23               ` Eli Zaretskii
2021-03-12 19:04                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 19:32                   ` Eli Zaretskii
2021-03-12 20:10                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13  8:34                       ` Eli Zaretskii
2021-03-19  9:42                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-19 12:10                           ` Eli Zaretskii
2021-03-19 14:05                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-19 14:09                               ` Eli Zaretskii
2021-03-20  9:52                                 ` Eli Zaretskii
2021-03-21  8:26                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21  9:52                                     ` Eli Zaretskii
2021-03-21 11:56                                       ` Eli Zaretskii
2021-03-21 14:37                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 15:34                                           ` Eli Zaretskii
2021-03-21 15:41                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 15:54                                               ` Eli Zaretskii
2021-03-21 16:41                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 17:01                                                   ` Eli Zaretskii
2021-03-21 18:36                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 16:51                                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 17:03                                                         ` Eli Zaretskii
2021-03-25 20:24                                                           ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 20:43                                                             ` Eli Zaretskii
2021-04-04 20:52                                                               ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 15:06                                                                 ` Eli Zaretskii
2021-04-05 16:09                                                                   ` Eli Zaretskii
2021-04-05 17:58                                                                     ` Eli Zaretskii
2021-04-06 13:17                                                                       ` Eli Zaretskii
2021-04-06 13:29                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 13:53                                                                           ` Eli Zaretskii
2021-04-06 14:01                                                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:45                                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:04                                                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:19                                                                     ` Eli Zaretskii
2021-04-05 18:47                                                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 19:22                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 15:49                                                                           ` Eli Zaretskii
2021-04-06 16:06                                                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 16:09                                                                               ` Eli Zaretskii
2021-03-21 14:36                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 18:42         ` Pip Cet
2021-03-12 19:50           ` Eli Zaretskii
2021-03-13  8:18             ` Pip Cet
2021-03-13  8:47               ` Eli Zaretskii
2021-03-13  8:53                 ` Pip Cet
2021-03-13 11:10                   ` Eli Zaretskii
2021-03-13 11:23                     ` Eli Zaretskii
2021-03-13 11:24                     ` Pip Cet
2021-03-13 15:27                       ` Eli Zaretskii
2021-03-13 15:45                         ` Pip Cet
2021-03-13 16:21                           ` Eli Zaretskii
2021-03-13 16:32                             ` Pip Cet
2021-03-13 16:53                               ` Eli Zaretskii
2021-03-13 17:10                                 ` Pip Cet
2021-03-13 17:26                                   ` Eli Zaretskii
2021-03-13 18:55                                     ` Pip Cet
2021-03-13 19:43                                       ` Eli Zaretskii
2021-03-13 20:53                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 21:00                                   ` Pip Cet
2021-03-13 21:07                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 21:11                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  6:07                                       ` Eli Zaretskii
2021-03-14  6:53                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:21                                           ` Eli Zaretskii
2021-03-14  7:31                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:48                                               ` Eli Zaretskii
2021-03-14  8:02                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:06                                                 ` Pip Cet
2021-03-14 11:39                                                   ` Eli Zaretskii
2021-03-14 11:44                                                     ` Pip Cet
2021-03-14 12:08                                                       ` Eli Zaretskii
2021-03-14 12:09                                                         ` Pip Cet
2021-03-14 12:17                                                           ` Pip Cet
2021-03-14 13:31                                                             ` Eli Zaretskii
2021-03-14 14:08                                                               ` Eli Zaretskii
2021-03-14 18:47                                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
     [not found]                                                                   ` <83mtv5frr4.fsf@gnu.org>
2021-03-14 20:30                                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-15 18:36                                                                       ` Eli Zaretskii
2021-03-15 20:17                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-16 13:25                                                                           ` Eli Zaretskii
2021-03-14  8:03                                               ` Pip Cet
2021-03-14  5:55                                   ` Eli Zaretskii
2021-03-14  6:57                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:20                                       ` Eli Zaretskii
2021-03-13 17:09                               ` Eli Zaretskii
2021-03-14 12:17                           ` Eli Zaretskii
2021-03-14 19:00                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14 19:48                               ` Eli Zaretskii
2021-03-14 20:36                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-15  3:24                                   ` Eli Zaretskii
2021-03-13 20:03                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors

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