Re: ctypes stack corruption [SEC=UNOFFICIAL]

So I went and setup a small test program using libffi and managed to 
recreate the erroneous behavior so it seems likely that this is an issue 
with libffi rather than ctypes. Time to head over to their mailing list 
and bother them there.

Many thanks guys,

- Dan

On 08/11/2012 23:58, Andrew MacIntyre wrote:
> [apologies for top post]
>
> Just to suggest, as Diez alluded to, that this might be an alignment issue between the libffi configuration that ctypes is using and the alignment that your C library routine is expecting.  This possibly could be related to structure definitions.
>
> You might be able to test this with C test code that calls your C routine via libffi (make sure its the version used by Python, in case there are multiple versions).
>
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>
>> -----Original Message-----
>> From: Daniel Holden [mailto:[email protected]]
>> Sent: Friday, 9 November 2012 12:06 AM
>> To: [email protected]
>> Subject: [ctypes-users] ctypes stack corruption
>>
>> Hi all,
>>
>> I was wondering if anyone could help me with a ctypes stack corruption
>> issue I'm having. The details are posted in this stack overflow question:
>>
>> http://stackoverflow.com/questions/13275211/python-ctypes-stack-
>> corruption
>>
>> I've been battling this bug for a while now and am at a bit of a dead
>> end. I was basically wondering if anyone had any more suggestions for
>> debugging techniques. I also don't want to out-rule that it might be a
>> bug in ctypes but needed a sanity check first.
>>
>> Certainly ctypes seems to believe `skel` is a pointer of some sort but
>> somehow it is getting put on the stack incorrectly. If anyone believes
>> it is a bug in ctypes I'll upload the code somewhere so that it can be
>> attempted to be reproduced.
>>
>> Thanks,
>>
>> Dan
>>
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