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For files found directly by the Perl interpreter, the file name in the probe
definition will usually be a relative path name; for files that are found
through the PERL5LIB environment variable, the file name in the probe
definition will usually be a full path name.

One typical use case would be to have a signal handler associated with a
specific signal, which when triggered would disable the module, read the
configuration from a given place, reconfigure the module accordingly and then
enable it.  Similarly, this kind of control can be implemented using remote
endpoints to deal with reconfiguring, disabling and enabling the module.

=head1 TODO

=over 4

=item

Probes are stored in a hash of file names; per file name, there is a hash
of line numbers (with the probe type as a value).  It is likely this can be
made more performant with a better data structure, but that needs profiling.