perl-modperl mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Perrin Harkins <>
Subject Re: how did I get here?
Date Wed, 08 Apr 2009 20:39:23 GMT
On Wed, Apr 8, 2009 at 4:14 PM, E R <> wrote:
> When diving into a large code base and trying to understand how it
> works, one thing that would be very helpful to know is how control
> gets to a particular point in the code. That is, for a given
> subroutine, what does the stack look like when the subroutine is
> executed?

The closest thing (aside from actually using Dtrace where Perl is
built with it) is either PERL_TRACE or a stack trace from

> Also, like dtrace, it would be nice to do this on a running
> perl/mod_perl process. It's kinda like being able to attach the perl
> debugger to a running process.

A cheap hack for this would be to build in stack trace logging calls
together with a logging system like Log::Log4Perl that can watch a
file to see when you turn logging on for a certain section.  It's no
Dtrace, but it's better than nothing if you need it.

- Perrin

View raw message