Fwd: SEGV in dbus-ping-send.c

[Vitaly V. Ch]

---------- Forwarded message ----------
From: Vitaly V. Ch <vitaly.v.ch at gmail.com>
Date: Oct 23, 2007 4:52 PM
Subject: Re: SEGV in dbus-ping-send.c
To: Rafaël Carré <funman at videolan.org>

Hm. It's success. Thanks
But At now I have another troubles with dbus-ping-listen.

sources and valgrind log is attached

bash-3.1# gdb ./dbus-ping-listen
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i486-slackware-linux"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /root/projects.izum/dbus.ping/dbus-ping-listen
Ping received: Ping!

Program received signal SIGSEGV, Segmentation fault.
0xb7d4e0c7 in free () from /lib/libc.so.6
(gdb) bt
#0  0xb7d4e0c7 in free () from /lib/libc.so.6
#1  0xb7f17e91 in dbus_free () from /usr/lib/libdbus-1.so.3
#2  0x080488db in signal_filter (connection=0x804b6e8, message=0x804bb10,
user_data=0x804ae88) at dbus-ping-listen.c :57
#3  0xb7efea2c in dbus_connection_dispatch () from /usr/lib/libdbus-1.so.3
#4  0xb7f2b56d in ?? () from /usr/lib/libdbus-glib-1.so.2
#5  0x0804b6e8 in ?? ()
#6  0x0804d4b8 in ?? ()
#7  0xbfbbf188 in ?? ()
#8  0xb7e69da2 in g_slist_prepend () from /usr/lib/libglib-2.0.so.0
#9  0xb7e51b11 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#10 0xb7e54b86 in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x0804a008 in ?? ()
#12 0x00000000 in ?? ()
(gdb) quit
The program is running.  Exit anyway? (y or n) y
bash-3.1#



On 10/23/07, Rafaël Carré < funman at videolan.org> wrote:
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Vitaly V. Ch a écrit :
> > I receive unexpected SIGSEGV at trying to start dbus-ping-send from
> > examples.
> >
> > dbus-ping-send.c is attached.
> >
> > system slackware-12.0
> >
> > bash-3.1# gdb ./dbus-ping-send
> > GNU gdb 6.6
> > Copyright (C) 2006 Free Software Foundation, Inc.
> > GDB is free software, covered by the GNU General Public License, and you
> are
> > welcome to change it and/or distribute copies of it under certain
> > conditions.
> > Type "show copying" to see the conditions.
> > There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> > This GDB was configured as "i486-slackware-linux"...
> > Using host libthread_db library "/lib/libthread_db.so.1".
> > (gdb) break send_ping
> > Breakpoint 1 at 0x80487c7: file dbus-ping-send.c, line 44.
> > (gdb) run
> > Starting program: /root/projects.izum/dbus.ping/dbus-ping-send
> >
> > Breakpoint 1, send_ping (bus=0x804b6e8) at dbus-ping-send.c:44
> > 44        message = dbus_message_new_signal ("/com/burtonini/dbus/ping",
> > (gdb) next
> > 47        dbus_message_append_args (message,
> > (gdb)
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > 0xb7cec253 in strlen () from /lib/libc.so.6
> > (gdb) bt
> > #0  0xb7cec253 in strlen () from /lib/libc.so.6
> > #1  0xb7eb2751 in ?? () from /usr/lib/libdbus- 1.so.3
> > #2  0x676e6950 in ?? ()
> > #3  0x00000061 in ?? ()
> > #4  0x0000006c in ?? ()
> > #5  0xbfe8d398 in ?? ()
> > #6  0xb7dbbff4 in ?? () from /lib/libc.so.6
> > #7  0xb7dbd120 in ?? () from /lib/libc.so.6
> > #8  0x0000000c in ?? ()
> > #9  0xb7eb3a3c in ?? () from /usr/lib/libdbus-1.so.3
> > #10 0xb7ce7b7e in malloc () from /lib/libc.so.6
> > #11 0xb7e9f4cc in ?? () from /usr/lib/libdbus-1.so.3
> > #12 0x0804bb50 in ?? ()
> > #13 0x00000000 in ?? ()
> > (gdb) quit
> > The program is running.  Exit anyway? (y or n) y
> > bash-3.1#
> >
> >
> > Log of runing under valgrind is attached also
> >
>
>   char *ping = "Ping!";
>   dbus_message_append_args (message,
>                             DBUS_TYPE_STRING, &ping,
>
> is the correct way to go
>
> - --
> Rafaël Carré
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> LtIq8fHm9ukaqH4ygohzx+Y=
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