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Unlike e.g. array refs, every code ref has a backreference to its glob (so that when you call it, caller can know the sub name). This is fairly easily accessible with the B module (which provides introspection facilities for perl thingies):
use B; sub coderef2name { eval { my $obj = B::svref_2object( shift() ); $obj->GV->STASH->NAME . "::" . $obj->GV->NAME; } || undef; }
Returns something like pkgname::__ANON__ for anonymous subs, or undef if something goes wrong (like being passed an array ref instead of a code ref).

Updated to use GV->STASH->NAME, not STASH->NAME. Thanks, betterworld


In reply to Re: How to de-reference a coderef? (B tricks) by ysth
in thread How to de-reference a coderef? by AndyH

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