gdb - default signals handling

• The 'info signals' command will show the current signals handling configuration:

  (gdb) info signals 
  Signal        Stop	Print	Pass to program	Description
  
  SIGHUP        Yes	Yes	Yes		Hangup
  SIGINT        Yes	Yes	No		Interrupt
  SIGQUIT       Yes	Yes	Yes		Quit
  ...

• The different options state that gdb does the following when the program receives the stated signal:
  1. Stop: stop the program's execution and fall into gdb's prompt.
  2. Print: print a message about the signal to the screen.
  3. Pass: pass the signal to the program (if stopped - only after the user continues execution).

Originally written by guy keren