[Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is

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* [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
       [not found] <bug-24454-4717@http.sourceware.org/bugzilla/>
@ 2021-09-10 19:35 ` mehmetgelisin at aol dot com
  2021-10-19  7:14 ` progonsaytu at gmail dot com
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 4+ messages in thread
From: mehmetgelisin at aol dot com @ 2021-09-10 19:35 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=24454

Mehmet gelisin <mehmetgelisin at aol dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mehmetgelisin at aol dot com

--- Comment #13 from Mehmet gelisin <mehmetgelisin at aol dot com> ---
#include <locale.h>
#include <stdio.h>
#include <wchar.h>

int
main(void)
{
        setlocale(LC_ALL, "");
        fgetwc(stdin);
        return 0;
} https://komiya-dental.com/
---

$ gcc -o poc poc.c
$ python -c 'print 13*"\t"' | LC_CTYPE=en_US.UTF-8 ./poc
Segmentation fault
$ python -c 'print 13*"\t"' | LC_CTYPE=POSIX ./poc
$ _

It means that I have to enter around 13 tabulator characters to trigger the
issue, but it won't hurt to add a few more. I was able to reproduce this on
other distributions with glibc 2.24, so I don't think that it's specific to one
of them.

Also, this issue only happens with an LC_CTYPE of an UTF-8 locale. I have
tested en_US and de_DE, which both trigger this issue. With POSIX or C, the
segmentation fault is not triggered.

I hope this helps you to track down this bug, as I was unable to figure out the
flush mechanisms in glibc in a reasonable time. :)


The stack trace on my system with glibc 2.24 looks like this:
 http://www.iu-bloomington.com/
(gdb) bt
#0  __GI__IO_wfile_sync (fp=0xb77295a0 <_IO_2_1_stdin_>) at wfileops.c:534
#1  0xb75e2bc6 in _IO_default_setbuf (fp=0xb77295a0 <_IO_2_1_stdin_>, p=0x0,
len=0) at genops.c:523
#2  0xb75df2e2 in _IO_new_file_setbuf (fp=0xb77295a0 <_IO_2_1_stdin_>, p=0x0,
len=0) at fileops.c:459 https://www.webb-dev.co.uk/ 
#3  0xb75e3516 in _IO_unbuffer_all () at genops.c:921
#4  _IO_cleanup () at genops.c:966
#5  0xb75a5632 in __run_exit_handlers (status=0, listp=0xb77293dc
<__exit_funcs>, run_list_atexit=true, run_dtors=true) at exit.c:96
#6  0xb75a56f1 in __GI_exit (status=0) at exit.c:105
#7  0xb758f1b2 in __libc_start_main (main=0x804846b <main>, argc=1,
argv=0xbfef4004, init=0x80484b0 <__libc_csu_init>, fini=0x8048510
<__libc_csu_fini>, 
    rtld_fini=0xb774d7a0 <_dl_fini>, stack_end=0xbfef3ffc) at
../csu/libc-start.c:323 https://waytowhatsnext.com/  

#include <locale.h>
#include <stdio.h>
#include <wchar.h>

int
main(void) http://www.acpirateradio.co.uk/
{
        setlocale(LC_ALL, "");
        fgetwc(stdin);
        return 0;
}
---

$ gcc -o poc poc.c
$ python -c 'print 13*"\t"' | LC_CTYPE=en_US.UTF-8 ./poc
Segmentation fault
$ python -c 'print 13*"\t"' | LC_CTYPE=POSIX ./poc
$ _ http://www.logoarts.co.uk/ 

It means that I have to enter around 13 tabulator characters to trigger the
issue, but it won't hurt to add a few more. I was able to reproduce this on
other distributions with glibc 2.24, so I don't think that it's specific to one
of them.

Also, this issue only happens with an LC_CTYPE of an UTF-8 locale. I have
tested en_US and de_DE, which both trigger this issue. With POSIX or C, the
http://www.slipstone.co.uk/  segmentation fault is not triggered.

I hope this helps you to track down this bug, as I was unable to figure out the
flush mechanisms in glibc in a reasonable time. :) http://embermanchester.uk/ 


The stack trace on my system with glibc 2.24 looks like this:
 http://connstr.net/ 
(gdb) bt
#0  __GI__IO_wfile_sync (fp=0xb77295a0 <_IO_2_1_stdin_>) at wfileops.c:534
http://joerg.li/ 
#1  0xb75e2bc6 in _IO_default_setbuf (fp=0xb77295a0 <_IO_2_1_stdin_>, p=0x0,
len=0) at genops.c:523
#2  0xb75df2e2 in _IO_new_file_setbuf (fp=0xb77295a0 <_IO_2_1_stdin_>, p=0x0, 
http://www.jopspeech.com/ len=0) at fileops.c:459
#3  0xb75e3516 in _IO_unbuffer_all () at genops.c:921
#4  _IO_cleanup () at genops.c:966 http://www.wearelondonmade.com/
#5  0xb75a5632 in __run_exit_handlers (status=0, listp=0xb77293dc
<__exit_funcs>, run_list_atexit=true, run_dtors=true) at exit.c:96
#6  0xb75a56f1 in __GI_exit (status=0) at exit.c:105
http://www.compilatori.com/
#7  0xb758f1b2 in __libc_start_main (main=0x804846b <main>, argc=1,
argv=0xbfef4004, init=0x80484b0 <__libc_csu_init>, fini=0x8048510
<__libc_csu_fini>,  http://www-look-4.com/
    rtld_fini=0xb774d7a0 <_dl_fini>, stack_end=0xbfef3ffc) at
../csu/libc-start.c:323

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* [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
       [not found] <bug-24454-4717@http.sourceware.org/bugzilla/>
  2021-09-10 19:35 ` [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed mehmetgelisin at aol dot com
@ 2021-10-19  7:14 ` progonsaytu at gmail dot com
  2021-10-19  7:31 ` mark at klomp dot org
  2021-10-24 10:03 ` glassmtech at ukr dot net
  3 siblings, 0 replies; 4+ messages in thread
From: progonsaytu at gmail dot com @ 2021-10-19  7:14 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=24454

progonsaytu <progonsaytu at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |progonsaytu at gmail dot com

--- Comment #14 from progonsaytu <progonsaytu at gmail dot com> ---
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https://www.secretovnet.org/archives/17645

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* [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
       [not found] <bug-24454-4717@http.sourceware.org/bugzilla/>
  2021-09-10 19:35 ` [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed mehmetgelisin at aol dot com
  2021-10-19  7:14 ` progonsaytu at gmail dot com
@ 2021-10-19  7:31 ` mark at klomp dot org
  2021-10-24 10:03 ` glassmtech at ukr dot net
  3 siblings, 0 replies; 4+ messages in thread
From: mark at klomp dot org @ 2021-10-19  7:31 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=24454

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

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* [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed.
       [not found] <bug-24454-4717@http.sourceware.org/bugzilla/>
                   ` (2 preceding siblings ...)
  2021-10-19  7:31 ` mark at klomp dot org
@ 2021-10-24 10:03 ` glassmtech at ukr dot net
  3 siblings, 0 replies; 4+ messages in thread
From: glassmtech at ukr dot net @ 2021-10-24 10:03 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=24454

glassmtech <glassmtech at ukr dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glassmtech at ukr dot net

--- Comment #15 from glassmtech <glassmtech at ukr dot net> ---
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http://www.о-ремонте.com/
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http://www.bsegypt.com/
http://www.buyingrealty.net/
http://www.khersonnews.com/
http://www.kontrolstroy.info/
http://www.sama-mama.com/
http://www.secretovnet.org/
http://www.teleriko.com/
http://www.us-best-store.com/
http://www.віктор.com/
http://www.accord-hotel.ru/
http://releazer.ru/
http://www.a-n-e-k-d-o-t.ru/
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https://architecture-and-design-news.com

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end of thread, other threads:[~2021-10-24 10:03 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <bug-24454-4717@http.sourceware.org/bugzilla/>
2021-09-10 19:35 ` [Bug gdb/24454] nat/x86-linux-dregs.c:146: internal-error: void x86_linux_update_debug_registers(lwp_info*): Assertion `lwp_is_stopped (lwp)' failed mehmetgelisin at aol dot com
2021-10-19  7:14 ` progonsaytu at gmail dot com
2021-10-19  7:31 ` mark at klomp dot org
2021-10-24 10:03 ` glassmtech at ukr dot net

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