[Python-Dev] How to debug python crashes (original) (raw)

Victor Stinner victor.stinner at gmail.com
Tue May 14 20:52:11 CEST 2013

Hi,

I don't know if it can help, but if you really don't know where your programcrash/hang occurs, you can use the faulthandler module:

https://pypi.python.org/pypi/faulthandler

It can be used to display te backtrace of all threads on an event like a signal or a timeout.

It works with Python, but you will need a compiler (like Visual Studio) to install it on Windows. I failed to build a MSI installer on Windows 64-bit with Visual Studio 2010 express. If someone can help me to build MSI, please contact me.

The documentation:

http://docs.python.org/dev/library/faulthandler.html

Victor

Le mardi 14 mai 2013, Philippe Fremy a écrit :

Hi,

I have a reproducable crash on Windows XP with Python 2.7 which I would like to investigate. I have Visual Studio 2008 installed and I downloaded the pdb files. However I could not find any instructions on how to use them and was unsuccessful at getting anything out of it. I checked the developer guide but could not find anything on debugging crashes. On internet, this seems to be also an underdocumented topic. So, a few questions : - is there some documentation to help debugging crashes ? - are the pdb files released along python usable with Visual Studio and stock Python ? Or do you need a hand-compiled version ? cheers, Philippe

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