model-checker : dangling pointer set to NULL

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

diff --git a/src/smpi/smpi_base.c b/src/smpi/smpi_base.c
index f114a57..e1d0252 100644 (file)
--- a/src/smpi/smpi_base.c
+++ b/src/smpi/smpi_base.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007-2013. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -187,7 +187,7 @@ static MPI_Request build_request(void *buf, int count,
                                  MPI_Datatype datatype, int src, int dst,
                                  int tag, MPI_Comm comm, unsigned flags)
 {
-  MPI_Request request;
+  MPI_Request request = NULL;
 
   void *old_buf = NULL;
 
@@ -219,6 +219,7 @@ static MPI_Request build_request(void *buf, int count,
   request->flags = flags;
   request->detached = 0;
   request->detached_sender = NULL;
+  request->real_src = 0;
 
   request->truncated = 0;
   request->real_size = 0;
@@ -284,9 +285,9 @@ static void smpi_mpi_request_free_voidp(void* request)
 MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
                                int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-    build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                  comm, PERSISTENT | SEND | PREPARED);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                          comm, PERSISTENT | SEND | PREPARED);
   request->refcount++;
   return request;
 }
@@ -294,9 +295,9 @@ MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype,
 MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
                                int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-    build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                  comm, PERSISTENT | SSEND | SEND | PREPARED);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                          comm, PERSISTENT | SSEND | SEND | PREPARED);
   request->refcount++;
   return request;
 }
@@ -304,9 +305,9 @@ MPI_Request smpi_mpi_ssend_init(void *buf, int count, MPI_Datatype datatype,
 MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype,
                                int src, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-    build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
-                  comm, PERSISTENT | RECV | PREPARED);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+                          comm, PERSISTENT | RECV | PREPARED);
   request->refcount++;
   return request;
 }
@@ -320,6 +321,7 @@ void smpi_mpi_start(MPI_Request request)
   if(request->flags & PREPARED)request->flags &= ~PREPARED;
   if(request->flags & RECV) {
     print_request("New recv", request);
+    //FIXME: if receive is posted with a large size, but send is smaller, mailboxes may not match !
     if (request->size < sg_cfg_get_int("smpi/async_small_thres"))
       mailbox = smpi_process_mailbox_small();
     else
@@ -345,7 +347,7 @@ void smpi_mpi_start(MPI_Request request)
     #ifdef HAVE_TRACING
       int rank = smpi_process_index();
       if (TRACE_smpi_view_internals()) {
-        TRACE_smpi_send(rank, rank, receiver);
+        TRACE_smpi_send(rank, rank, receiver,request->size);
       }
     #endif
 /*    if(receiver == MPI_UNDEFINED) {*/
@@ -441,20 +443,18 @@ void smpi_mpi_request_free(MPI_Request * request)
 MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype,
                             int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-    build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                  comm, NON_PERSISTENT | SEND | PREPARED);
-
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf , count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                          comm, NON_PERSISTENT | ISEND | SEND | PREPARED);
   return request;
 }
 
 MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
                            int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-      build_request(buf==MPI_BOTTOM?(void*)0:buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                    comm, NON_PERSISTENT | ISEND | SEND);
-
+  MPI_Request request = NULL;
+  request =  build_request(buf==MPI_BOTTOM?(void*)0:buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                           comm, NON_PERSISTENT | ISEND | SEND);
   smpi_mpi_start(request);
   return request;
 }
@@ -462,9 +462,9 @@ MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype,
 MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
                            int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-      build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                    comm, NON_PERSISTENT | ISEND | SSEND | SEND);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                          comm, NON_PERSISTENT | ISEND | SSEND | SEND);
   smpi_mpi_start(request);
   return request;
 }
@@ -474,19 +474,18 @@ MPI_Request smpi_mpi_issend(void *buf, int count, MPI_Datatype datatype,
 MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype,
                             int src, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-    build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
-                  comm, NON_PERSISTENT | RECV | PREPARED);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+                          comm, NON_PERSISTENT | RECV | PREPARED);
   return request;
 }
 
 MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
                            int src, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-      build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
-                    comm, NON_PERSISTENT | RECV);
-
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, src == MPI_ANY_SOURCE ? MPI_ANY_SOURCE : smpi_group_index(smpi_comm_group(comm), src), smpi_process_index(), tag,
+                          comm, NON_PERSISTENT | RECV);
   smpi_mpi_start(request);
   return request;
 }
@@ -494,9 +493,10 @@ MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype,
 void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
                    int tag, MPI_Comm comm, MPI_Status * status)
 {
-  MPI_Request request;
+  MPI_Request request = NULL;
   request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm);
   smpi_mpi_wait(&request, status);
+  request = NULL;
 }
 
 
@@ -504,23 +504,25 @@ void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src,
 void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst,
                    int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-      build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                    comm, NON_PERSISTENT | SEND);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                          comm, NON_PERSISTENT | SEND);
+
   smpi_mpi_start(request);
   smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
-
+  request = NULL;
 }
 
 void smpi_mpi_ssend(void *buf, int count, MPI_Datatype datatype,
                            int dst, int tag, MPI_Comm comm)
 {
-  MPI_Request request =
-      build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
-                    comm, NON_PERSISTENT | SSEND | SEND);
+  MPI_Request request = NULL;
+  request = build_request(buf==MPI_BOTTOM ? (void*)0 : buf, count, datatype, smpi_process_index(), smpi_group_index(smpi_comm_group(comm), dst), tag,
+                comm, NON_PERSISTENT | SSEND | SEND);
 
   smpi_mpi_start(request);
   smpi_mpi_wait(&request, MPI_STATUS_IGNORE);
+  request = NULL;
 }
 
 void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
@@ -753,6 +755,12 @@ void smpi_mpi_wait(MPI_Request * request, MPI_Status * status)
   if ((*request)->action != NULL) { // this is not a detached send
     simcall_comm_wait((*request)->action, -1.0);
   }
+
+#ifdef HAVE_MC
+  if(MC_is_active())
+    (*request)->action->comm.dst_data = NULL; // dangling pointer : dst_data is freed with a wait, need to set it to NULL for system state comparison
+#endif
+
   finish_wait(request, status);
   request=MPI_REQUEST_NULL;
   // FIXME for a detached send, finish_wait is not called: