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Devel::CallTrace(3pm) User Contributed Perl Documentation Devel::CallTrace(3pm)

NAME

Devel::CallTrace - See what your code's doing

SYNOPSIS

#!/usr/bin/perl -d:CallTrace

package foo;

sub bar {
print "bar\n";
baz(); }

sub baz {
print "boo\n"; }

foo::bar();

RATIONALE

There are a number of perl modules in the CPAN that are designed to trace a program's execution as it runs. Each uses a different trick to do its job, but none of them quite met my needs. The technique this module uses is quite simple and seems to be quite robust.

DB::sub

perl will automatically call DB::sub on each subroutine call and leave it up to us to dispatch to where we want to go.

Devel::CallTrace::called

This routine is called with two parameters:

The integer "depth" that this call is being called at.
A reference to the routine's @INC

To get at the subroutine that was being called, have a look at $DB::sub

BUGS

It uses the debugger. How could it not have bugs?

SEE ALSO

perldebguts, DB, a licensed therapist.

trace - Uses source filters. Scares me.

Devel::TraceCalls - Very robust API. The code seems to do all sorts of scary magic

Debug::Trace - Uses symbol table magic to wrap your functions.

Devel::TRaceFuncs - Requires developers to instrument their source files.

COPYRIGHT

Copyright 2005 Jesse Vincent <jesse@bestpractical.com>

This module may be redistributed under the same terms as perl itself

2022-12-04 perl v5.36.0