Help from the Perlmonks Chatterbox...
...says look at [link|http://search.cpan.org/search?mode=module&query=Devel::TraceFuncs|Devel::TraceFuncs], [link|http://search.cpan.org/search?mode=module&query=Devel::TraceCalls|Devel::TraceCalls], and [link|http://search.cpan.org/search?mode=module&query=Debug::Trace|Debug::Trace].
-YendorMike
[link|http://www.hope-ride.org/|http://www.hope-ride.org/]