GDB is gnu’s very own debugger

• b main or b 72 (set breakpoint on main function or line 72)
• r args (run with args)
• p thingname or p 3+5 (print a variable or return value)
  • p/t print as binary
  • p/x print as hex
• info (get args, locals)
• n s continue next, step, continue

int test;
short lsb = 0xff;
test |= lsb

printf("%d\n",lsb);

int test;