From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Thu, 15 Jul 2010 01:05:16 +0000 (-0400)
Subject: add paranoid check before listener thread destruction
X-Git-Tag: v0.6~10
X-Git-Url: http://git.lttng.org/?p=ust.git;a=commitdiff_plain;h=4267e589be114e837b06ad0b40fc58cdf7ea080a

add paranoid check before listener thread destruction

In case a pthread error prevented its creation.
---

diff --git a/libust/tracectl.c b/libust/tracectl.c
index 2f9215e..0322037 100644
--- a/libust/tracectl.c
+++ b/libust/tracectl.c
@@ -1070,8 +1070,9 @@ void create_listener(void)
 	if(result) {
 		PERROR("pthread_sigmask: %s", strerror(result));
 	}
-
-	have_listener = 1;
+	else {
+		have_listener = 1;
+	}
 }
 
 static int init_socket(void)
@@ -1369,10 +1370,13 @@ int restarting_usleep(useconds_t usecs)
 	return result;
 }
 
-static void stop_listener()
+static void stop_listener(void)
 {
 	int result;
 
+	if(!have_listener)
+		return;
+
 	result = pthread_cancel(listener_thread);
 	if(result != 0) {
 		ERR("pthread_cancel: %s", strerror(result));