fbt
Probes
fbt
provides a probe at the
boundary of most functions in the
kernel. The boundary of a function is crossed by entering the
function and by returning from the function. fbt
thus provides two functions for every function in the kernel: one
upon entry to the function, and one upon return from the function.
These probes are named entry
and
return
, respectively. The function name,
and module name are specified as part of the probe. All
fbt
probes specify a function name and
module name.