GNU gdb (Ubuntu/Linaro 7.3-0ubuntu2) 7.3-2011.08 Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later 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 "x86_64-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/bin/nautilus...Reading symbols from /usr/lib/debug/usr/bin/nautilus...done. done. (gdb) handle SIG33 pass nostop noprint Signal Stop Print Pass to program Description SIG33 No No Yes Real-time event 33 (gdb) set pagination 0 (gdb) run Starting program: /usr/bin/nautilus [Thread debugging using libthread_db enabled] Gtk-Message: Failed to load module "canberra-gtk-module" [New Thread 0x7fffed3b7700 (LWP 23688)] [New Thread 0x7fffecbb6700 (LWP 23689)] [Thread 0x7fffecbb6700 (LWP 23689) exited] [Thread 0x7fffed3b7700 (LWP 23688) exited] [Inferior 1 (process 23685) exited normally] (gdb) backtrace dffull No stack. (gdb) info tregisters The program has no registers now. (gdb) x/16i $pc No registers. (gdb) thread apply all backtrace (gdb) quit