Some compilers complain when comparing signed and unsigned. romio321
was doing just this. The check is meant to check whether a size (which
is an ADIO_Offset-- a signed number) will work with memcpy which takes
a size_t. To silence the warning I added a new type (ADIO_Size) which
is an unsigned type and cast the ADIO_Offset to this new type.
Fixes#5951
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
When romio314 was first pulled in an extra patch was applied to it, see commit
92f6c7c1e210c559471a05aaac9b19e0bd3d71bb. Most of that patch is already present
in vanilla romio321, but the fix for MPIO_DATATYPE_ISCOMMITTED() isn't.
If that macro doesn't set err_ then some paths end up with a variable being used
uninitialized. In particular you can trace through romio321/romio/mpi-io/read.c
to see what happens with error_code. It's an uninitialized stack variable that goes
through three MPIO_CHECK_* macros none of which set it. The macros consistently set
error_code to a failure if they see something wrong, but they don't consistently
set it to success when things are fine.
And then in the last macro MPIO_CHECK_DATATYPE it tries to look at the value
of error_code that was never set.
Signed-off-by: Mark Allen <markalle@us.ibm.com>
This commit attempts to update the romio io component to not use
functions removed in MPI-3.0 (2012). This is a first cut and will
probably need to be reviewed for correctness.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
(back-ported from commit open-mpi/ompi@84765001aa)
Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
romio assumes that all predefined datatypes are contiguous. Because of
the (terribly named) composed datatypes MPI_SHORT_INT, MPI_DOUBLE_INT,
MPI_LONG_INT, etc this is an incorrect assumption. The simplest way to
fix this is to override the MPI_Type_get_envelope and
MPI_Type_get_contents calls with calls that will work on these
datatypes. Note that not all calls to these MPI functions are
replaced, only the ones used when flattening a non-contiguous
datatype.
References #5009
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
(back-ported from commit open-mpi/ompi@4d876ec6fe)
Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
