in reply to get the list of methods and variables

Class::Inspector might also help.  For example:

#!/usr/bin/perl -l package PkgA; sub fooA {} sub barA {} package PkgB; use base "PkgA"; sub fooB {} package PkgC; use base "PkgB"; sub barC {} package main; use Class::Inspector; print for @{ Class::Inspector->methods('PkgC', 'full') }; __END__ PkgA::barA PkgC::barC PkgA::fooA PkgB::fooB

Or, if you want to call it from within the child package (PkgC):

... package PkgC; ... use Class::Inspector; print for @{ Class::Inspector->methods(__PACKAGE__, 'full') };