- void *send = calloc(send_size*comm_size, smpi_datatype_size(MPI_CURRENT_TYPE));
- void *recv = calloc(recv_size*comm_size, smpi_datatype_size(MPI_CURRENT_TYPE2));
+ void *send = xbt_malloc(send_size*comm_size* smpi_datatype_size(MPI_CURRENT_TYPE));
+ void *recv = xbt_malloc(recv_size*comm_size* smpi_datatype_size(MPI_CURRENT_TYPE2));