GNU bug report logs -
#18032
Crash with etags
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Reported by: Paul Eggert <eggert <at> cs.ucla.edu>
Date: Wed, 16 Jul 2014 13:43:02 UTC
Severity: normal
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
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:
bug#18032
; Package
emacs
.
(Wed, 16 Jul 2014 13:43:03 GMT)
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Paul Eggert <eggert <at> cs.ucla.edu>
:
New bug report received and forwarded. Copy sent to
bug-gnu-emacs <at> gnu.org
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(Wed, 16 Jul 2014 13:43:03 GMT)
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
[This bug report is taken from:
http://lists.gnu.org/archive/html/emacs-devel/2014-07/msg00209.html
I'm filing it here to give it a proper bug number and thread.
Dr. Werner Fink <werner <at> suse.de> writes:]
Hi,
after installing the linux kernel sources, I see
cd /usr/src/linux
ulimit -c unlimited
make TAGS
GEN TAGS
xargs: etags: terminated by signal 11
gdb /usr/bin/etags core
[...]
Reading symbols from /usr/bin/etags...Reading symbols from
/usr/lib/debug/usr/bin/etags.debug...done.
done.
[New LWP 14768]
Core was generated by `etags -a
--regex=^\(ENTRY\|_GLOBAL\)(\([^)]*\)).* \2 / --regex=^SYSCALL_DEFINE['.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 __memcpy_sse2_unaligned () at
../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:37
37 ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: No
such file or directory.
(gdb) up
#1 0x000000000040376c in memcpy (__len=90, __src=<optimized out>,
__dest=0x18ea090) at /usr/include/bits/string3.h:51
51 return __builtin___memcpy_chk (__dest, __src, __len,
__bos0 (__dest));
(gdb) up
#2 substitute (in=0x17048f0 "ENTRY(lguest_entry)", out=0x1707301
"2", regs=0x1705dc8, regs=0x1705dc8)
at /usr/src/debug/emacs-24.3/lib-src/etags.c:5792
5792 memcpy (t, in + regs->start[dig], diglen);
(gdb) list
5787 for (t = result; *out != '\0'; out++)
5788 if (*out == '\\' && ISDIGIT (*++out))
5789 {
5790 dig = *out - '0';
5791 diglen = regs->end[dig] - regs->start[dig];
5792 memcpy (t, in + regs->start[dig], diglen);
5793 t += diglen;
5794 }
5795 else
5796 *t++ = *out;
(gdb) print *out - '0'
$1 = 2
(gdb) print regs->end[dig] - regs->start[dig]
value has been optimized out
(gdb) print regs->end[dig]
value has been optimized out
(gdb) print regs
$2 = (struct re_registers *) 0x1705dc8
(gdb) print *regs
$3 = {num_regs = 4, start = 0x18d1d40, end = 0x18d4fc0}
(gdb) print *regs->end
$4 = 21474836499
(gdb) print regs->end
$5 = (regoff_t *) 0x18d4fc0
(gdb) print *regs->end
$6 = 21474836499
(gdb) print *regs->start
$7 = 0
(gdb) print *regs->end[2]
Cannot access memory at address 0x70000000000005f
I've also an other bug report about etags and kernel source tree, see
the cloned bug at http://rudin.suse.de:8888/show_bug.cgi?id=887483
Werner
-- "Having a smoking section in a restaurant is like having a peeing
section in a swimming pool." -- Edward Burr
Information forwarded
to
bug-gnu-emacs <at> gnu.org
:
bug#18032
; Package
emacs
.
(Sun, 13 Oct 2019 01:25:01 GMT)
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Message #8 received at 18032 <at> debbugs.gnu.org (full text, mbox):
Paul Eggert <eggert <at> cs.ucla.edu> writes:
> [This bug report is taken from:
> http://lists.gnu.org/archive/html/emacs-devel/2014-07/msg00209.html
> I'm filing it here to give it a proper bug number and thread.
> Dr. Werner Fink <werner <at> suse.de> writes:]
[...]
> Reading symbols from /usr/bin/etags...Reading symbols from
> /usr/lib/debug/usr/bin/etags.debug...done.
> done.
> [New LWP 14768]
> Core was generated by `etags -a
> --regex=^\(ENTRY\|_GLOBAL\)(\([^)]*\)).* \2 /
> --regex=^SYSCALL_DEFINE['.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0 __memcpy_sse2_unaligned () at
> ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:37
> 37 ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: No
> such file or directory.
> (gdb) up
> #1 0x000000000040376c in memcpy (__len=90, __src=<optimized
> out>, __dest=0x18ea090) at /usr/include/bits/string3.h:51
> 51 return __builtin___memcpy_chk (__dest, __src, __len,
> __bos0 (__dest));
This was five years ago, and unfortunately this wasn't handled at the
time. But it's unlikely that we'll be making more progress here at this
point, so I'm closing this bug report. Please reopen if you're still
seeing these crashes in modern versions of Emacs.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug closed, send any further explanations to
18032 <at> debbugs.gnu.org and Paul Eggert <eggert <at> cs.ucla.edu>
Request was from
Lars Ingebrigtsen <larsi <at> gnus.org>
to
control <at> debbugs.gnu.org
.
(Sun, 13 Oct 2019 01:25:02 GMT)
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bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org
.
(Sun, 10 Nov 2019 12:24:11 GMT)
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This bug report was last modified 4 years and 178 days ago.
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