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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Using the Perl debugger on Lire code</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="Lire Developer's Manual"><link rel="up" href="ch18.html" title="Chapter 18. Testing and debugging"><link rel="prev" href="ch18s02.html" title="Test-installations and test-runs"><link rel="next" href="ch19.html" title="Chapter 19. Making a Release"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Using the Perl debugger on Lire code</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch18s02.html">Prev</a> </td><th width="60%" align="center">Chapter 18. Testing and debugging</th><td width="20%" align="right"> <a accesskey="n" href="ch19.html">Next</a></td></tr></table><hr></div><div class="section" title="Using the Perl debugger on Lire code"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id418352"></a>Using the Perl debugger on Lire code</h2></div></div></div><p>
Please use the perl debugger: investing some time to learn is pays back really
quick. Here's a very tiny howto.
</p><p>
Start the debugger as e.g.
</p><pre class="programlisting">
perl -d `which lr_log2report` -o xml combined < tmp/log > /dev/null
</pre><p>
After starting the debugger, run "v" and "c lineno" to make sure all modules are
loaded. Once that's done, you can fast-forward to a relevant routine using
e.g. "c Lire::DlfAnalysers::ReferrerCategoriser::categorise". Now you can
inspect variables and evaluate expressions by running e.g.
</p><pre class="programlisting">
DB<12> x $parsed_url->{'query'}
</pre><p>
Also, be sure to try the commands "s" and "r". Just these 4 command very likely
are enough to get your job done. (The "y" command might be useful too, though).
See perldebug(1) and perldebtut(1) for more information.
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch18s02.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch18.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch19.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Test-installations and test-runs </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 19. Making a Release</td></tr></table></div></body></html>
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