[trace] bugfix, correct matching of link keys on trace

details:
- push new keys to the tail, get on the head
- all conclusions taken by visualizing mpi communications
of smpi traces should be reconsidered, sorry for this

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@9756 48e7efb5-ca39-0410-a469-dd3cf9ba447f

diff --git a/src/instr/instr_smpi.c b/src/instr/instr_smpi.c
index 659f444..50c1c17 100644 (file)
--- a/src/instr/instr_smpi.c
+++ b/src/instr/instr_smpi.c
@@ -45,10 +45,11 @@ static char *TRACE_smpi_get_key(int src, int dst, char *key, int n)
   snprintf(aux, INSTR_DEFAULT_STR_SIZE, "%d#%d", src, dst);
   xbt_dynar_t d = xbt_dict_get_or_null(keys, aux);
 
-  int length = xbt_dynar_length(d);
-  char *s = xbt_dynar_get_as (d, length-1, char *);
+  xbt_assert1(xbt_dynar_length(d)!=0,
+      "Trying to get a link key (for message reception) that has no corresponding send (%s).", __FUNCTION__);
+  char *s = xbt_dynar_get_as (d, 0, char *);
   snprintf (key, n, "%s", s);
-  xbt_dynar_remove_at (d, length-1, NULL);
+  xbt_dynar_remove_at (d, 0, NULL);
   return key;
 }