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bug#17771: 24.3.91; SIGSEGV in cleanup_vector
From: |
Eli Zaretskii |
Subject: |
bug#17771: 24.3.91; SIGSEGV in cleanup_vector |
Date: |
Fri, 13 Jun 2014 17:52:22 +0300 |
> From: Stephen Berman <stephen.berman@gmx.net>
> Cc: 17771@debbugs.gnu.org
> Date: Fri, 13 Jun 2014 16:13:42 +0200
>
> > I installed a trivial workaround for that in r117235 on the emacs-24
> > branch. The diffs are below. Can you try this and see if the problem
> > is solved? It's possible that the real problem is somewhere else, in
> > which case you will probably see it when you apply the patch.
>
> With the patch, Emacs still crashes with the same recipe, but the first
> frame of backtrace is different (looks like not in Emacs):
I think it's just a bogus pointer to the font driver, and somehow
valid_font_driver doesn't catch it in time.
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000c260b2 in ?? ()
> (gdb) bt full
> #0 0x0000000000c260b2 in ?? ()
> No symbol table info available.
> #1 0x00000000005aa580 in cleanup_vector (vector=0x3dd52c8)
> at ../../../../bzr/emacs/emacs-24/src/alloc.c:2935
> drv = 0x3dd5130
> #2 0x00000000005aa686 in sweep_vectors ()
> at ../../../../bzr/emacs/emacs-24/src/alloc.c:2974
> total_bytes = 140737488344592
> free_this_block = false
> nbytes = 1048
> block = 0x3dd4680
> bprev = 0xbf1060
> lv = 0x6282a3 <balance_intervals+31>
> lvprev = 0xbf2070
> vector = 0x3dd52c8
> next = 0x3dd52c8
> #3 0x00000000005b0141 in gc_sweep () at
> ../../../../bzr/emacs/emacs-24/src/alloc.c:6721
So Dmitry, I think Stephen here just found you a perfect recipe to
reproduce bug #16140, something that I failed to do. Could you please
look into this?
Thanks.
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, (continued)
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Eli Zaretskii, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Eli Zaretskii, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Eli Zaretskii, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Eli Zaretskii, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Eli Zaretskii, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/13
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector,
Eli Zaretskii <=
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Dmitry Antipov, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Dmitry Antipov, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Dmitry Antipov, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Andreas Schwab, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Dmitry Antipov, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Stephen Berman, 2014/06/16
- bug#17771: 24.3.91; SIGSEGV in cleanup_vector, Dmitry Antipov, 2014/06/16