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Think about Loose Coupling

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Assuming that one has access to the commandline one could always use Carp::Always or Devel::SimpleTrace via perl's -M option or perl's PERL5OPT.

If one is interested in the arguments being passed insert an INIT block of the form

INIT { require Data::Dumper; require Scalar::Util; # And now redefine Carp::format_arg so Carp can dump refs too! no warnings qw(once redefine uninitialized); *Carp::format_arg=sub { my $arg_S=shift; my $return_s; if (not defined $arg_S) { # It's an undef $return_s='undef'; } elsif (Scalar::Util::blessed($arg_S)) { # It's an object my $buffer_s; { local $Data::Dumper::Indent=0; local $Data::Dumper::Terse=0; # deparse any CodeRefs local $Data::Dumper::Deparse=ref($arg_S) eq 'CODE'; $buffer_s=Data::Dumper::Dumper($arg_S); $buffer_s=~ s/^\$VAR\d+\s*=\s*//; $buffer_s=~ s/;\s*$//; }; $return_s=$buffer_s; } elsif (ref($arg_S)) { # It's a ref Array, Code or Hash my $buffer_s; { local $Data::Dumper::Indent=1; #local $Data::Dumper::Terse=0; # deparse any CodeRefs local $Data::Dumper::Deparse=ref($arg_S) eq 'CODE'; $buffer_s=Data::Dumper::Dumper($arg_S); $buffer_s=~ s/^\$VAR\d+\s*=\s*//; $buffer_s=~ s/;\s*$//; $buffer_s=~ s/ */ /g if (ref($arg_S) eq 'CODE'); }; $return_s=$buffer_s; } else { $return_s=$arg_S; $return_s=~ s/'/\\'/g; $return_s=Carp::str_len_trim($arg_S,$Carp::Heavy::MaxArgLe +n); $return_s="'$arg_S'" unless $arg_S =~ /^-?[\d.]+\z/; } $return_s=~ s/([[:cntrl:]]|[[:^ascii:]])/sprintf("\\x{%x}",ord +($1))/eg; return $return_s; }; # Carp::format_arg; }

into Carp::Always.

In reply to Re: Finding what called a subroutine by clueless newbie
in thread Finding what called a subroutine by Anonymous Monk

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