mpi-buffer-deref¶
This check verifies if a buffer passed to an MPI (Message Passing Interface)
function is sufficiently dereferenced. Buffers should be passed as a single
pointer or array. As MPI function signatures specify void *
for their buffer
types, insufficiently dereferenced buffers can be passed, like for example as
double pointers or multidimensional arrays, without a compiler warning emitted.
Examples:
// A double pointer is passed to the MPI function.
char *buf;
MPI_Send(&buf, 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
// A multidimensional array is passed to the MPI function.
short buf[1][1];
MPI_Send(buf, 1, MPI_SHORT, 0, 0, MPI_COMM_WORLD);
// A pointer to an array is passed to the MPI function.
short *buf[1];
MPI_Send(buf, 1, MPI_SHORT, 0, 0, MPI_COMM_WORLD);