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The code is well protected against such issues. If one of our base structures become larger than corresponding predefined structure, the compiler should trigger an error similar to:
In file included from ../../../ompi/ompi/datatype/ompi_datatype_create_contiguous.c:23:0:
../../../ompi/ompi/datatype/ompi_datatype.h:105:10: error: size of array 'padding' is too large
char padding[PREDEFINED_DATATYPE_PAD - sizeof(ompi_datatype_t)];
This is the case for all types that have a predefined enveloppe. Thus, the commit 30268 was unnecessary as the check was already included in the compilation by the inclusion of the ompi_debugger_canary.c.
On Jan 13, 2014, at 17:10 , Jeff Squyres (jsquyres) <jsquyres_at_[hidden]> wrote:
> I noticed the following this morning:
> * sizeof(ompi_predefined_datatype_t): 512
> * sizeof(ompi_datatype_t): 488
> * padding left: 24
> Do we need to increase the size of padding for predefined communicators for v1.9?
> Jeff Squyres
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