From 34f2f42cccff62773dd710b695bdfd1363b85d45 Mon Sep 17 00:00:00 2001
From: mquinson <mquinson@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Tue, 7 Dec 2010 08:46:46 +0000
Subject: [PATCH] don't try to compute the backtrace if we have no process name
 (only occure with *badly* written bindings, but saves a segfault then)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@9020 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 src/xbt/backtrace_linux.c | 3 +++
 src/xbt/ex.c              | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/src/xbt/backtrace_linux.c b/src/xbt/backtrace_linux.c
index be2ebc476b..0401eebb7d 100644
--- a/src/xbt/backtrace_linux.c
+++ b/src/xbt/backtrace_linux.c
@@ -60,6 +60,9 @@ void xbt_ex_setup_backtrace(xbt_ex_t * e)
               && e->used,
               "Backtrace not setup yet, cannot set it up for display");
 
+  if (!xbt_binary_name) /* no binary name, nothing to do */
+    return;
+
   backtrace_syms = backtrace_symbols(e->bt, e->used);
   /* ignore first one, which is this xbt_backtrace_current() */
   e->used--;
diff --git a/src/xbt/ex.c b/src/xbt/ex.c
index cd6d584573..1b141a4d9b 100644
--- a/src/xbt/ex.c
+++ b/src/xbt/ex.c
@@ -153,6 +153,10 @@ void xbt_ex_display(xbt_ex_t * e)
   {
     int i;
 
+    if (!xbt_binary_name) {
+      fprintf(stderr, "variable 'xbt_binary_name' set to NULL. Cannot compute the backtrace\n");
+      return;
+    }
     fprintf(stderr, "\n");
     for (i = 0; i < e->used; i++)
       fprintf(stderr, "%s\n", e->bt_strings[i]);
-- 
2.20.1