So let's use perl to parse Perl...

use v5.10;
use strict;
use warnings;

{
    package SubLister;
    use Class::Inspector;
    sub list_subs {
        my $number = int rand 999_999_999;
        our @SUBS = ();
        eval qq{
                package Random$number;
            }.shift.q{
            BEGIN {
                @SubLister::SUBS = @{Class::Inspector->functions(__PAC
+KAGE__)};
                die;
            }
        };
        return @SUBS;
    }
}

my $source_code = <<'SRC';
sub foo { 1 }
sub bar { 2 }
sub baz { 3 }
CORE::say("We don't want to execute this!");
SRC

say("Got: $_") for SubLister::list_subs($source_code);
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