numpy-discussion

[Numpy-discussion] NA_updateDataPtr segmentation fault =?iso-8859-1?q?bug=3F=0A?=

[Marco B. <ma...@bu...>]

Hi

I have a little function in pyrex:

cdef NumArray array_to_float(NumArray array):
=A0=A0#=A0maybe=A0here=A0is=A0memoty=A0leak!
=A0=A0cdef=A0NumArray=A0flat_array
=A0=A0cdef=A0NumArray=A0new_array
=A0=A0print=A0'mark=A01'
=A0=A0new_array=A0=3D=A0array.astype('Float32')
=A0=A0print=A0new_array
=A0=A0print=A0'mark=A02'
=A0=A0NA_updateDataPtr(new_array)
=A0=A0print=A0'mark=A03'=A0=A0=A0
=A0=A0NA_updateDataPtr(new_array)
=A0=A0print=A0'mark=A04'=A0=A0
=A0=A0flat_array=A0=3D=A0NA_InputArray(new_array,=A0tFloat32,=A0NUM_C_ARRAY)
=A0=A0print=A0'mark=A05'=A0=A0
=A0=A0return=A0flat_array

After the second NA_updateDataPtr I get a segmentation fault> Otherwise I
get it with the NA_InputArray. It goes down to getReadBufferDataPtr and
than to=20
rval =3D buff2->ob_type->tp_as_buffer->bf_getreadbuffer(buff2, 0, buff);

I believe bf_getreadbuffer is memory_getbuf but I'm not sure. I don't the
bug but its happen.=20

Can somebody help me?

thanks and regards

Marco

Re: [Numpy-discussion] NA_updateDataPtr segmentation fault bug?

[Todd M. <jm...@st...>]

On Tue, 2004-02-24 at 16:37, Marco Bubke wrote:
> Hi
> 
> I have a little function in pyrex:
> 
> cdef NumArray array_to_float(NumArray array):
>   # maybe here is memoty leak!
>   cdef NumArray flat_array
>   cdef NumArray new_array
>   print 'mark 1'
>   new_array = array.astype('Float32')
>   print new_array
>   print 'mark 2'
>   NA_updateDataPtr(new_array)
>   print 'mark 3'   
>   NA_updateDataPtr(new_array)
>   print 'mark 4'  
>   flat_array = NA_InputArray(new_array, tFloat32, NUM_C_ARRAY)
>   print 'mark 5'  
>   return flat_array
> 
> After the second NA_updateDataPtr I get a segmentation fault> Otherwise I
> get it with the NA_InputArray. It goes down to getReadBufferDataPtr and
> than to 
> rval = buff2->ob_type->tp_as_buffer->bf_getreadbuffer(buff2, 0, buff);
> 
> I believe bf_getreadbuffer is memory_getbuf but I'm not sure. I don't the
> bug but its happen. 
> 
> Can somebody help me?

Maybe you could post the pyrex generated C-code and we could take a look
at that?

Regards,
Todd

> 
> thanks and regards
> 
> Marco
> 
> 
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