More information is now printed if a data race is detected in dynamically allocated memory.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7606 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/exp-drd/drd_error.c b/exp-drd/drd_error.c
index 20d3aff..fb6a23d 100644
--- a/exp-drd/drd_error.c
+++ b/exp-drd/drd_error.c
@@ -248,6 +248,9 @@
    }
    else if (ai.akind == eMallocd && ai.lastchange)
    {
+      VG_(message)(Vg_UserMsg,
+                   "Address 0x%08lx is at offset %ld. Allocation context:",
+                   dri->addr, ai.rwoffset);
       VG_(pp_ExeContext)(ai.lastchange);
    }
    else