$ sudo gdb gst-launch-1.0 11772
GNU gdb (Linaro GDB) 7.4-2012.06-ubuntu
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "i686-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /usr/bin/gst-launch-1.0...(no debugging symbols found)...done.
Attaching to program: /usr/bin/gst-launch-1.0, process 11772
Reading symbols from /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0
Reading symbols from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Reading symbols from /lib/i386-linux-gnu/libglib-2.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib/i386-linux-gnu/libglib-2.0.so.0
Reading symbols from /lib/i386-linux-gnu/libpthread.so.0...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libpthread-2.15.so...done.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb62a9b40 (LWP 11774)]
[New Thread 0xb6cddb40 (LWP 11773)]
done.
Loaded symbols for /lib/i386-linux-gnu/libpthread.so.0
Reading symbols from /lib/i386-linux-gnu/libc.so.6...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libc-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libc.so.6
Reading symbols from /usr/lib/i386-linux-gnu/libgmodule-2.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libgmodule-2.0.so.0
Reading symbols from /lib/i386-linux-gnu/librt.so.1...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/librt-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/librt.so.1
Reading symbols from /lib/i386-linux-gnu/libdl.so.2...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libdl-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libdl.so.2
Reading symbols from /usr/lib/i386-linux-gnu/libffi.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libffi.so.6
Reading symbols from /lib/i386-linux-gnu/libpcre.so.3...(no debugging symbols found)...done.
Loaded symbols for /lib/i386-linux-gnu/libpcre.so.3
Reading symbols from /lib/ld-linux.so.2...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/ld-2.15.so...done.
done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/i386-linux-gnu/libnss_compat.so.2...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libnss_compat-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libnss_compat.so.2
Reading symbols from /lib/i386-linux-gnu/libnsl.so.1...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libnsl-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libnsl.so.1
Reading symbols from /lib/i386-linux-gnu/libnss_nis.so.2...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libnss_nis-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libnss_nis.so.2
Reading symbols from /lib/i386-linux-gnu/libnss_files.so.2...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libnss_files-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libnss_files.so.2
Reading symbols from /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstautodetect.so...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstautodetect.so
Reading symbols from /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstcoreelements.so...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstcoreelements.so
Reading symbols from /usr/lib/i386-linux-gnu/libgstbase-1.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libgstbase-1.0.so.0
Reading symbols from /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstxvimagesink.so...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstxvimagesink.so
Reading symbols from /usr/lib/i386-linux-gnu/libgstvideo-1.0.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libgstvideo-1.0.so.0
Reading symbols from /usr/lib/i386-linux-gnu/libX11.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libX11.so.6
Reading symbols from /usr/lib/i386-linux-gnu/libXv.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libXv.so.1
Reading symbols from /usr/lib/i386-linux-gnu/libXext.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libXext.so.6
Reading symbols from /lib/i386-linux-gnu/libm.so.6...Reading symbols from /usr/lib/debug/lib/i386-linux-gnu/libm-2.15.so...done.
done.
Loaded symbols for /lib/i386-linux-gnu/libm.so.6
Reading symbols from /usr/lib/i386-linux-gnu/liborc-0.4.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/liborc-0.4.so.0
Reading symbols from /usr/lib/i386-linux-gnu/libxcb.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libxcb.so.1
Reading symbols from /usr/lib/i386-linux-gnu/libXau.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libXau.so.6
Reading symbols from /usr/lib/i386-linux-gnu/libXdmcp.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libXdmcp.so.6
Reading symbols from /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstvideo4linux2.so...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/gstreamer-1.0/libgstvideo4linux2.so
Reading symbols from /usr/lib/i386-linux-gnu/libv4l2.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libv4l2.so.0
Reading symbols from /usr/lib/i386-linux-gnu/libv4lconvert.so.0...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libv4lconvert.so.0
Reading symbols from /usr/lib/i386-linux-gnu/libjpeg.so.8...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/i386-linux-gnu/libjpeg.so.8
0xb76e2424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb76e2424 in __kernel_vsyscall ()
#1  0xb7395380 in __GI___poll (fds=0x93442a8, nfds=2, timeout=250) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0xb74ce4fb in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb74bfd70 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb74c024b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb75f522c in gst_bus_poll () from /usr/lib/i386-linux-gnu/libgstreamer-1.0.so.0
#6  0x0804af12 in ?? ()
#7  0x0804a7ed in ?? ()
#8  0xb72d24d3 in __libc_start_main (main=0x8049ff0, argc=4, ubp_av=0xbf8f8964, init=0x804cb90, fini=0x804cc00,
    rtld_fini=0xb76f2270 <_dl_fini>, stack_end=0xbf8f895c) at libc-start.c:226
#9  0x0804ad0d in ?? ()