From c263daf925a7a74f7ae64b049cf3def8b298beee Mon Sep 17 00:00:00 2001
From: Jerome Marchand <jmarchan@redhat.com>
Date: Wed, 10 Jun 2020 10:28:42 +0200
Subject: [PATCH 1/4] deadlock: print a more explicit message when
 pthread_mutex_unlock can't be attached

Most likely, this happen because of a missing --binary argument. Let's
be friendly to our user and print a more useful messsage.
---
 tools/deadlock.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/deadlock.py b/tools/deadlock.py
index 17848720..81122adb 100755
--- a/tools/deadlock.py
+++ b/tools/deadlock.py
@@ -483,7 +483,7 @@ import time
                 pid=args.pid,
             )
         except Exception as e:
-            print('%s. Failed to attach to symbol: %s' % (str(e), symbol))
+            print('%s. Failed to attach to symbol: %s\nIs --binary argument missing?' % (str(e), symbol))
             sys.exit(1)
     for symbol in args.lock_symbols:
         try:
-- 
2.25.4