[Crossfire-wiki] [Crossfire DokuWiki] page added: crossfire_debugging_tips

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Date        : 2008/05/20 16:56
User        : anmaster
Edit Summary: created

====== Crossfire debugging tips ======
This page contains some tips for debugging.

===== Valgrind =====
Valgrind is a tool to find memory related errors, for example reading a variable before initializing it, reading or writing non-allocated memory, memory leaks, and so on.

However, due to the cfpython plugin, valgrind output tends to get filled up by a lot of python related valgrind errors. These are false positives (or at least nothing related to us). There is a solution: valgrind got a feature called suppression file. It lists errors valgrind should ignore. Here is an example of such a file, this works on my system, you will likely need to customize it, for your python system, and for changing lib64 to lib unless you are on a 64-bit platform.

  {
     Python cond
     Memcheck:Cond
     obj:/usr/lib64/libpython2.4.so.1.0
  }
  
  {
     Python value 8
     Memcheck:Value8
     obj:/usr/lib64/libpython2.4.so.1.0
  }
  {
     Python invalid read 4
     Memcheck:Addr4
     obj:/usr/lib64/libpython2.4.so.1.0
  }
  {
     Python mem leak
     Memcheck:Leak
     obj:/usr/lib64/libpython2.4.so.1.0
  }

Then run valgrind something like this:
  valgrind --suppressions=path/to/suppressions-file --leak-check=full ./crossfire-server
This will ignore errors that are not interesting for crossfire developers.


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New Revision: http://wiki.metalforge.net/doku.php/crossfire_debugging_tips

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