Fix errors about uninitialized variables.

[simgrid.git] / src / smpi / smpi_base.c

diff --git a/src/smpi/smpi_base.c b/src/smpi/smpi_base.c
index 1387109..d29b237 100644 (file)
--- a/src/smpi/smpi_base.c
+++ b/src/smpi/smpi_base.c
@@ -42,7 +42,7 @@ static MPI_Request build_request(void *buf, int count,
 {
   MPI_Request request;
 
-  void *old_buf;
+  void *old_buf = NULL;
 
   request = xbt_new(s_smpi_mpi_request_t, 1);
 
@@ -159,14 +159,18 @@ void smpi_mpi_start(MPI_Request request)
     // FIXME: SIMIX does not yet support non-contiguous datatypes
     request->action = simcall_comm_irecv(mailbox, request->buf, &request->size, &match_recv, request);
   } else {
+
+    int receiver = smpi_group_index(smpi_comm_group(request->comm), request->dst);
+    if(receiver == MPI_UNDEFINED) {
+      XBT_WARN("Trying to send a message to a wrong rank");
+      return;
+    }
     print_request("New send", request);
     if (request->size < xbt_cfg_get_int(_surf_cfg_set, "smpi/async_small_thres")) { // eager mode
-      mailbox = smpi_process_remote_mailbox_small(
-                                                  smpi_group_index(smpi_comm_group(request->comm), request->dst));
+      mailbox = smpi_process_remote_mailbox_small(receiver);
     }else{
       XBT_DEBUG("Send request %p is not in the permanent receive mailbox (buf: %p)",request,request->buf);
-      mailbox = smpi_process_remote_mailbox(
-                                            smpi_group_index(smpi_comm_group(request->comm), request->dst));
+      mailbox = smpi_process_remote_mailbox(receiver);
     }
     if (request->size < 64*1024 ) { //(FIXME: this limit should be configurable)
       void *oldbuf = request->buf;
@@ -580,6 +584,7 @@ int smpi_mpi_testsome(int incount, MPI_Request requests[], int *indices,
   MPI_Status *pstat = status == MPI_STATUSES_IGNORE ? MPI_STATUS_IGNORE : &stat;
 
   count = 0;
+  count_dead = 0;
   for(i = 0; i < incount; i++) {
     if((requests[i] != MPI_REQUEST_NULL)) {
       if(smpi_mpi_test(&requests[i], pstat)) {