Made an error message more explicit (hopefully)

[simgrid.git] / src / gras / Msg / msg.c

diff --git a/src/gras/Msg/msg.c b/src/gras/Msg/msg.c
index 33cee8c..c0a5e03 100644 (file)
--- a/src/gras/Msg/msg.c
+++ b/src/gras/Msg/msg.c
@@ -139,7 +139,10 @@ gras_msgtype_declare_v(const char           *name,
   xbt_error_t   errcode;
   gras_msgtype_t msgtype;
   char *namev=make_namev(name,version);
-  
+   
+  if (!payload) 
+     WARN1("Message %s has NULL payload",name);
+   
   errcode = xbt_set_get_by_name(_gras_msgtype_set,
                                 namev,(xbt_set_elm_t*)&msgtype);
 
@@ -246,7 +249,7 @@ gras_msg_recv(gras_socket_t    sock,
   TRY(gras_trp_chunk_recv(sock, header, 6));
   for (cpt=0; cpt<4; cpt++)
     if (header[cpt] != GRAS_header[cpt])
-      RAISE0(mismatch_error,"Incoming bytes do not look like a GRAS message");
+      RAISE2(mismatch_error,"Incoming bytes do not look like a GRAS message (header='%.4s' not '%.4s')",header,GRAS_header);
   if (header[4] != GRAS_header[4]) 
     RAISE2(mismatch_error,"GRAS protocol mismatch (got %d, use %d)",
           (int)header[4], (int)GRAS_header[4]);