this workaround helps caching a snapshot of the source of the corresponding file (path is in $0) and bypasses the problems of Attribute::Handlers.

UNITCHECK {
  my $pos=tell DATA;
  seek DATA,0,0;
  $main::SOURCE{$0}=[<DATA>];
  seek DATA,$pos,0;
}
[download]

works fine I can access the hash %main::SOURCE from everywhere, but ATM I'll have to include this block in any module I wanna process.

Is there a global option to automatically include an UNITCHECK in any compiled file?

UPDATE: Hmm ...or maybe I could gather all processed filenames so far from %INC, which I may process in one global CHECK block...