Solved

How to debug into sub functions in Perl?

Posted on 2011-03-24
3
500 Views
Last Modified: 2012-05-11
Hi,
I have subfunction in my code and Perl debugger cannot go into it.

Here is what I do:

perl -d myFile
b linenumber
c
s

Open in new window



It stops at linenumber and when I say step into it it skips. n also does not work.

Here is the beginning of my sub function:

SOME CODE

my (%c, %d);
sub logFunc {
    my ($a, $b) = @_;
    my $S;
    my $file;

SOME OTHER CODE

} #myFunc

SOME MORE CODE

Open in new window



How can I debug this code?
0
Comment
Question by:Tolgar
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 8

Expert Comment

by:point_pleasant
ID: 35210385
n runs until the next statement (the one immediately following this one in the current file) is about to execute. Note that if the current line is a subroutine call, the debugger won't stop until returning from that subroutine. To stop at the first line of the called subroutine, use the s (single-step) command instead. The r command executes until returning from the current subroutine (i.e., until we pop the activation stack).

0
 

Author Comment

by:Tolgar
ID: 35210568
Well, I already use s but it still does not go into the subroutine. Why is that?

Thanks,
0
 
LVL 25

Accepted Solution

by:
clockwatcher earned 500 total points
ID: 35211636
This may be a stupid question but are you expecting what you posted to actually step into that function?  

SOME CODE

my (%c, %d);
sub logFunc {
    my ($a, $b) = @_;
    my $S;
    my $file;

SOME OTHER CODE

} #myFunc

Open in new window


If you are, that's your problem right there.  The code that you posted never calls your function so the debugger won't ever actually be in there to step into it.  If you actually call your function, then you'll step into that section of the code.

SOME CODE

my (%c, %d);
sub logFunc {
    my ($a, $b) = @_;
    my $S;
    my $file;

SOME OTHER CODE

} #myFunc

# call your function
my $val = logFunc( 5, 5);

Open in new window

0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Perl Scripting from a shell script with if and for 4 87
Perl Awk Need Help 3 138
Insert Text into odbc.ini file 15 71
Vb script to unzip a files and rename the files 12 122
On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (http://dilbert.com/strips/comic/2007-08…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question