Put the following code in a file called: /yourperl/site/Devel/Calls.pm: 

package Devel::Calls;

our $lastsub;

sub DB::DB {
    my( $p, $f, $l, $sub ) = caller(1);
    return if $lastsub and $sub eq $lastsub;
    printf STDERR "%s(%u): %s()\n",
        $f//'unknown', $l//'0', $sub//'unknown',
    $lastsub = $sub;
    return;
}

1;

[download]

And then invoke your scripts with perl -d:Calls yoursript.pl

You'll get a trace showing file, line and subroutine name whenever a subroutine is entered, something like:

C:\test>perl -d:Calls nestedSubs.pl 1 2 3
unknown(0): unknown()
nestedSubs.pl(31): main::aaa()
nestedSubs.pl(29): main::bbb()
nestedSubs.pl(28): main::ccc()
nestedSubs.pl(27): main::ddd()
nestedSubs.pl(26): main::eee()
nestedSubs.pl(25): main::fff()
nestedSubs.pl(24): main::ggg()
nestedSubs.pl(23): main::hhh()
nestedSubs.pl(22): main::iii()
nestedSubs.pl(21): main::jjj()
nestedSubs.pl(20): main::kkk()
nestedSubs.pl(19): main::lll()
nestedSubs.pl(18): main::mmm()
nestedSubs.pl(17): main::nnn()
nestedSubs.pl(16): main::ooo()
nestedSubs.pl(15): main::ppp()
nestedSubs.pl(14): main::qqq()
nestedSubs.pl(13): main::rrr()
nestedSubs.pl(12): main::sss()
nestedSubs.pl(11): main::ttt()
nestedSubs.pl(10): main::uuu()
nestedSubs.pl(9): main::vvv()
nestedSubs.pl(8): main::www()
nestedSubs.pl(7): main::xxx()
nestedSubs.pl(6): main::yyy()
nestedSubs.pl(5): main::zzz()
234

[download]

That could obviously be greatly extended, but it may be just what you're looking for.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong

In reply to Re: Analyzing Perl Code by BrowserUk
in thread Analyzing Perl Code by nitin1704

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