#13151: fix pickling of Matrix_modn_dense_double on SPARC
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Reporter: malb | Owner: drkirkby
Type: defect | Status: new
Priority: major | Milestone: sage-5.9
Component: porting | Resolution:
Keywords: Solaris SPARC | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by jpflori):
Replying to [comment:7 jdemeyer]:
> eplying to [comment:2 vbraun]:
> > I tried `gcc -munaligned-doubles` but that didn't help.
> >
> > The problem seems to be that malloc on 32-bit SPARC solaris generally
returns 4-byte aligned buffers.
> That's not necessarily the case. The string `<char*>s` isn't directly
generated from a `malloc`, instead it is the result of a
`PyString_AsString()` call. That isn't guaranteed to be 8-bytes aligned.
>
> The obvious solution is to allocate a buffer ourselves, fill that and
pass the result to `PyString_FromStringAndSize(buf, size)`. This will
cause an extra `memcpy()` but that might be unavoidable.
So should we go with that solution?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13151#comment:23>
Sage <http://www.sagemath.org>
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