gdb output

GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from /home/srujana/src5/mozilla-central/obj-x86_64-pc-linux-gnu/dist/bin/firefox...done.
Attaching to program: /home/srujana/src5/mozilla-central/obj-x86_64-pc-linux-gnu/dist/bin/firefox, process 17723
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
__lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
135	../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or directory.
Loading JavaScript value pretty-printers; see js/src/gdb/README.
If they cause trouble, type: disable pretty-printer .* SpiderMonkey
SpiderMonkey unwinder is disabled by default, to enable it type:
	enable unwinder .* SpiderMonkey
warning: Missing auto-load script at offset 0 in section .debug_gdb_scripts
of file /home/srujana/src5/mozilla-central/obj-x86_64-pc-linux-gnu/dist/bin/libxul.so.
Use `info auto-load python-scripts [REGEXP]' to list them.
(gdb)