Let me be explicit on this one: I don't want to start another 'using a debugger is good or bad'-flamewar here again, I just have a question regarding the use of Devel::ptkdb...

I regularely use Devel::ptkdb to debug my programs. A colleague of mine came up with a question last week, to which I didn't have the answer. That's because I never used multithreading and forked processes before.

He tested Devel::ptkdb on a program that used fork(). The debugger just hang with an error saying
Xlib: unexpected async reply (sequence 0x5f1)!
X Error of failed request:  BadIDChoice (invalid resource ID chosen fo
+r this connection)
  Major opcode of failed request:  53 (X_CreatePixmap)
  Resource id in failed request:  0x4000078
  Serial number of failed request:  1564
  Current serial number in output stream:  1480

[download]


Does anyone know how to prevent this behaviour or how to debug multithreading perlscripts with a graphical debugger?

Jouke Visser, Perl 'Adept'

In reply to Forked processes && Perl TK Debugger (ptkdb) by Jouke

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.