1) Generating core file

https://jvns.ca/blog/2018/04/28/debugging-a-segfault-on-linux/

https://www.cse.unsw.edu.au/~learn/debugging/modules/gdb_coredumps/




ulimit -c unlimited
sudo sysctl -w kernel.core_pattern=/tmp/core-%e.%p.%h.%t
cat /proc/PID/limit

echo "<desired-file-path>/<desired-file-name>" > /proc/sys/kernel/core_pattern

gcc -g <any other flags> -o file_name file_name.c

$ ./<file_name>
Segmentation fault (core dumped)

 gdb <binary-file> <core-dump-file>










2) Some GDB Tips

 a) GDB Gui
 		ctr+a+x  (very use full)

 b) Gnu Doc
        https://ftp.gnu.org/old-gnu/Manuals/gdb/html_node/gdb_28.html#:~:text=You%20can%20see%20these%20breakpoints,command%20%60maint%20info%20breakpoints'%20.&text=Using%20the%20same%20format%20as,shown%20with%20negative%20breakpoint%20numbers.

	https://go.dev/doc/gdb
	https://sourceware.org/gdb/current/onlinedocs/gdb/

 c) info break

 d) print var_name

 e) set var var_name=val

 f) c - continue

 g) n- next

 h) q - quit