I recently found a case where ompi_mpi_abort() segv's:
{{{
$ mpirun --mca btl non_existent_btl_name ...
}}}
In this case, the BML init fails because we have no paths to any
peers. It calls ompi_mpi_abort(), but this is before ompi_comm_self
has been setup. ompi_mpi_abort() assumes that if the comm parameter
is != NULL, it can be used. But since we aborted so early in
MPI_INIT, that's a false assumption.
(note that this isn't happening on v1.8 because the check for
INIT/FINALIZE in ompi_mpi_abort() is a little different. Hence: this
is a trunk issue -- at least for now)
When fixing this problem, I noticed a few other problems in ompi_mpi_abort():
* the group access was incorrect (it didn't use accessor functions)
* it wasn't clear that ORTE's ompi_rte_abort_peers() returns
NOT_IMPLEMENTED and falls through down to ompi_rte_abort()
* the check for my proc in the communicator was a little more
complicated than necessary
* the logic for checking for aborts early in MPI_INIT wasn't right
* some comments were stale
* the hostname output in error messages would be NULL if MPI_FINALIZE
had been invoked
* it was possible to abort, but still exit with a 0 status
This commit fixes all of the above problems, and makes the logic a
little more straightforward. Thanks to Ralph Castain and George
Bosilca for the assists with this patch.
This commit was SVN r32125.
852af8b834