$ perl -MPadWalker -MDynaLoader -le " print for grep /_/, keys %::"
_<perl.c
_<perllib.c
_<C:/perl/site/5.14.1/lib/MSWin32-x86-multi-thread/auto/PadWalker/PadWalker.dll
_<PadWalker.c
&#8616;ARNING_BITS
_<DynaLoader.c
_<-e
_<Win32CORE.c
_<..\perlio.c
&#8597;E_TRIE_MAXBUF
_<..\universal.c
_<..\mro.c
_
_<win32.c
_<C:/perl/5.14.1/lib/warnings.pm