$ gdb glxgears
...
(gdb) run
Starting program: /usr/bin/glxgears 
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff509b068 in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
(gdb) bt
#0  0x00007ffff509b068 in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
#1  0x00007ffff50596ee in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
#2  0x00007ffff4edd6c2 in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
#3  0x00007ffff4df6d12 in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
#4  0x00007ffff4e08722 in ?? () from /usr/lib/xorg/modules/dri/i965_dri.so
#5  0x00000000004025d7 in ?? ()
#6  0x0000000000401d44 in ?? ()
#7  0x00007ffff71a8000 in __libc_start_main () from /usr/lib/libc.so.6
#8  0x0000000000402312 in ?? ()
(gdb)