Having trouble here but here is what i understood so far:


mypc$ gdb eog
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
(no debugging symbols found)
(gdb) run
Starting program: /usr/bin/eog 
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[Thread debugging using libthread_db enabled]
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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[New Thread 0xb6c2f750 (LWP 15757)]
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---Type <return> to continue, or q <return> to quit---
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** (eog:15757): WARNING **: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
[New Thread 0xb692bb90 (LWP 15760)]
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---Type <return> to continue, or q <return> to quit---Error while reading shared library symbols:
Quit
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Program exited normally.
(gdb) thread apply all bt
No registers.
(gdb)