37.3.1.  Tracing

37.3.1.  Tracing

The simplest kind of probe is simply to trace an event. This is the effect of inserting strategically located print statements into a program. This is often the first step of problem solving: explore by seeing a history of what has happened.

This style of instrumentation is the simplest. It just asks systemtap to print something at each event. To express this in the script language, you need to say where to probe and what to print there.


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