[C++-sig] Re: Boost::Python for C code -> Segmentation fault
Ralf W. Grosse-Kunstleve
rwgk at yahoo.com
Wed Jul 28 07:48:35 CEST 2004
--- sashan <sashang at ihug.co.nz> wrote:
> Mario Palomo wrote:
> > It doesn't work. I get the same segfault with the extern "C" and without
> > the extern "C".
> > I'll try make_setter and make_getter rather than def_readwrite(). Then
> > I'll try to run python inside gdb and get a backtrace (bt) of where the
> > segfault is happening... Can someone reproduce my segfault?
> For what its worth I can repro it.
There is no segfault under Red Hat 8 when using these commands:
g++ -fPIC -O0 -I/net/worm/scratch1/rwgk/dist/boost -I/usr/include/python2.2 -c
-o segfault.os segfault.cpp
g++ -shared -o segfault.so segfault.os -Llibtbx -lboost_python -lm
from segfault import *
u = user()
u.number = 1
u.name = "abc"
Traceback (most recent call last):
File "zi", line 6, in ?
TypeError: No to_python (by-value) converter found for C++ type: char*
The TypeError is expected. I don't know why the assignment to u.name doesn't
throw an expection. Ideally the def_readwrite("name", ...) shouldn't even
- first try to build some simple examples that are known to work.
- don't wrap assignments to raw pointers if there is nothing
to manage the lifetime of the pointee. Boost.Python doesn't do
this for you.
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