From: Eli Zaretskii <eliz@gnu.org>
To: Alex <agrambot@gmail.com>
Cc: 28710@debbugs.gnu.org
Subject: bug#28710: 27.0.50; eassert failure in maybe_produce_line_number
Date: Mon, 09 Oct 2017 21:51:09 +0300 [thread overview]
Message-ID: <83lgkkqhnm.fsf@gnu.org> (raw)
In-Reply-To: <877ew4ciij.fsf@gmail.com> (message from Alex on Mon, 09 Oct 2017 11:56:20 -0600)
> From: Alex <agrambot@gmail.com>
> Cc: 28710@debbugs.gnu.org
> Date: Mon, 09 Oct 2017 11:56:20 -0600
>
> > Thanks. I installed a change that should fix the problem, please try
> > the latest emacs-26 branch.
>
> Looks like it's fixed, thanks.
Great, thanks for testing.
> > Thread 1 hit Breakpoint 3, Fredraw_display () at dispnew.c:3032
> > 3032 FOR_EACH_FRAME (tail, frame)
> > (gdb) n
> > 3033 if (FRAME_VISIBLE_P (XFRAME (frame)))
> > (gdb) p XFRAME(frame)
> > $1 = (struct frame *) 0x1b5e380 <dumped_data+4020672>
> > (gdb) p $1->redisplay
> > $2 = true
> > (gdb) watch -l $1->redisplay
> > Hardware watchpoint 4: -location $1->redisplay
> > (gdb) commands
> > > bt
> > > continue
> > > end
> > (gdb) continue
> >
> > and then continue with the recipe, and show all the backtraces you get.
>
> Unfortunately, when I try to use XFRAME, I get:
> No symbol "__builtin_assume_aligned" in current context.
OK, then you could use a slightly different way:
Thread 1 hit Breakpoint 3, Fredraw_display () at dispnew.c:3032
3032 FOR_EACH_FRAME (tail, frame)
(gdb) n
3033 if (FRAME_VISIBLE_P (XFRAME (frame)))
(gdb) p frame
$1 = XIL(0xa000000001b5e380)
(gdb) xframe
$2 = (struct frame *) 0x1b5e380 <dumped_data+4020672>
"emacs@HOME-C4E4A596F7"
(gdb) p $2->redisplay
$3 = true
(gdb) watch -l $2->redisplay
Hardware watchpoint 4: -location $2->redisplay
(gdb) commands
Type commands for breakpoint(s) 4, one per line.
End with a line saying just "end".
>bt
>continue
>end
(gdb) continue
(The "xframe" command is defined in src/.gdbinit, so if you are not
running GDB from the src directory, you will need to tell it to read
that file:
(gdb) source /path/to/emacs/src/.gdbinit
> I tried the following workaround, but no backtraces showed up:
>
> Thread 1 "emacs-26.0.60.4" hit Breakpoint 1, Fredraw_display ()
> at dispnew.c:3032
> 3032 FOR_EACH_FRAME (tail, frame)
> (gdb) n
> 3033 if (FRAME_VISIBLE_P (XFRAME (frame)))
> (gdb) p (struct frame *) XLI(frame) - Lisp_Vectorlike
> $3 = (struct frame *) 0x15c9285 <bss_sbrk_buffer+8055909>
When I try this, I get a different frame pointer and a warning message
from GDB. So let's hope this workaround is incorrect ;-)
Thanks.
next prev parent reply other threads:[~2017-10-09 18:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-04 22:31 bug#28710: 27.0.50; eassert failure in maybe_produce_line_number Alex
2017-10-05 8:30 ` Eli Zaretskii
2017-10-05 23:51 ` Alex
2017-10-06 8:38 ` Eli Zaretskii
2017-10-07 23:05 ` Alex
2017-10-08 6:29 ` Eli Zaretskii
2017-10-08 7:11 ` Alex
2017-10-08 9:35 ` Eli Zaretskii
2017-10-08 10:09 ` Eli Zaretskii
2017-10-09 13:03 ` Eli Zaretskii
2017-10-08 19:05 ` Alex
2017-10-08 19:50 ` Eli Zaretskii
2017-10-08 21:19 ` Alex
2017-10-09 12:40 ` Eli Zaretskii
2017-10-09 17:56 ` Alex
2017-10-09 18:51 ` Eli Zaretskii [this message]
2017-10-09 19:36 ` Alex
2017-10-10 6:21 ` Eli Zaretskii
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