GNU gdb 6.6-debian
Copyright (C) 2006 Free Software Foundation, Inc.
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This GDB was configured as "i486-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
Attaching to program: /sbin/wpa_supplicant, process 8437
Reading symbols from /usr/lib/i686/cmov/libssl.so.0.9.8...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i686/cmov/libssl.so.0.9.8
Reading symbols from /usr/lib/i686/cmov/libcrypto.so.0.9.8...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i686/cmov/libcrypto.so.0.9.8
Reading symbols from /lib/tls/i686/cmov/libdl.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libdl.so.2
Reading symbols from /usr/lib/libdbus-1.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libdbus-1.so.3
Reading symbols from /lib/tls/i686/cmov/libc.so.6...
(no debugging symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libc.so.6
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/ld-linux.so.2...
(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
(no debugging symbols found)
0xffffe410 in __kernel_vsyscall ()
(gdb) br *0x08081964
Breakpoint 1 at 0x8081964
(gdb) br *0x08081a3a
Breakpoint 2 at 0x8081a3a
(gdb) set variable $count = 2
(gdb) commands 1
Type commands for when breakpoint 1 is hit, one per line.
End with a line saying just "end".
>silent
>set variable $cow = (unsigned long*)($ebp - 0x14)
>watch *$cow
>cont
>end
(gdb) commands 2
Type commands for when breakpoint 2 is hit, one per line.
End with a line saying just "end".
>silent
>set variable $count = $count + 1
>delete $count
>cont
>end
(gdb) cont
Continuing.
Hardware watchpoint 3: *$cow
Hardware watchpoint 4: *$cow
Hardware watchpoint 5: *$cow
Hardware watchpoint 6: *$cow
Hardware watchpoint 7: *$cow
Hardware watchpoint 8: *$cow
Hardware watchpoint 9: *$cow
Hardware watchpoint 10: *$cow
Hardware watchpoint 11: *$cow
Hardware watchpoint 12: *$cow
Hardware watchpoint 13: *$cow
Hardware watchpoint 13: *$cow

Old value = 4278845440
New value = 4278845546
0x0804eae6 in ?? ()
(gdb) bt
#0  0x0804eae6 in ?? ()
#1  0x00000008 in ?? ()
#2  0x080a2395 in ?? ()
#3  0x080a239d in ?? ()
#4  0x08094c8b in ?? ()
#5  0xbff3b978 in ?? ()
#6  0x08082297 in ?? ()
#7  0x080a239d in ?? ()
#8  0xbff3b95c in ?? ()
#9  0x00000010 in ?? ()
#10 0x00000079 in ?? ()
#11 0xb7dd816c in ?? () from /lib/tls/i686/cmov/libc.so.6
#12 0xb7dd816c in ?? () from /lib/tls/i686/cmov/libc.so.6
#13 0x00000000 in ?? ()
(gdb) info reg
eax            0x6a	106
ecx            0xa	10
edx            0x61	97
ebx            0x60	96
esp            0xbff3b868	0xbff3b868
ebp            0xbff3b878	0xbff3b878
esi            0x80a23ad	134882221
edi            0xbff3b964	-1074546332
eip            0x804eae6	0x804eae6 <dbus_message_append_args@plt+10382>
eflags         0x206	[ PF IF ]
cs             0x73	115
ss             0x7b	123
ds             0x7b	123
es             0x7b	123
fs             0x0	0
gs             0x33	51
(gdb) x/10i $eip
0x804eae6 <dbus_message_append_args@plt+10382>:	addl   $0x1,0xfffffff0(%ebp)
0x804eaea <dbus_message_append_args@plt+10386>:	mov    0xfffffff0(%ebp),%eax
0x804eaed <dbus_message_append_args@plt+10389>:	cmp    %eax,0x10(%ebp)
0x804eaf0 <dbus_message_append_args@plt+10392>:	
    je     0x804eb13 <dbus_message_append_args@plt+10427>
0x804eaf2 <dbus_message_append_args@plt+10394>:	add    $0x1,%edi
0x804eaf5 <dbus_message_append_args@plt+10397>:	add    $0x2,%esi
0x804eaf8 <dbus_message_append_args@plt+10400>:	movsbl (%esi),%eax
0x804eafb <dbus_message_append_args@plt+10403>:	
    call   0x804ea00 <dbus_message_append_args@plt+10152>
0x804eb00 <dbus_message_append_args@plt+10408>:	test   %eax,%eax
0x804eb02 <dbus_message_append_args@plt+10410>:	mov    %eax,%ebx
(gdb)