defined before using them. So before even writing our _Hello world_ program,
we need to define the format of our tracepoint. This is done by writing a
**template file**, with a name usually ending with the `.tp` extension (for **t**race**p**oint),
defined before using them. So before even writing our _Hello world_ program,
we need to define the format of our tracepoint. This is done by writing a
**template file**, with a name usually ending with the `.tp` extension (for **t**race**p**oint),