#13151: fix pickling of Matrix_modn_dense_double on Solaris (Mark)
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Reporter: malb | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-5.2
Component: pickling | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by 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.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13151#comment:7>
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