Re: Segfault in in PyString_FromStringAndSize

On Fri, Mar 06, 2009 at 10:06:04AM -0500, James Henstridge wrote:
> Hi Fernando,
> 
> For these sort of bugs, I'd recommend using valgrind to track down the problem.
> 
> First you'll need a test program that triggers the bug, but it sounds
> like you've got that already.
> 
> Unfortunately, to get best results you'll probably need to compile
> your own Python interpreter with the --disable-pymalloc flag to
> configure.  This is needed because valgrind doesn't know how to track
> allocations made by Python's special purpose memory allocator.
> Disabling that allocator causes Python to do standard malloc/free
> calls, giving useful results.
> 
> [I've got a patch for Python that would do this automatically at
> runtime, but it hasn't been reviewed or merged yet].
> 
> You can then try something like:
> 
>     valgrind --tool=memcheck --log-file=valgrind.log --leak-check=full
> --num-callers=20 /path/to/my/python test-script.py
> 
> That should produce some interesting information.
Hi James,
thanks for the advice. I'll try it ASAP, then repost.

Chau,
Fernando

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