X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-app.c;h=030358241f663548265493bd2459c00977be0013;hb=df0f840ba686e3fe670c9906fd46330fff65da07;hp=bb012b5d84fc0e8b92ace19dde174c2dcb633fef;hpb=915d047cc8abd8a6e1255dba3e877236f8e8be51;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index bb012b5d8..030358241 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -1935,6 +1935,9 @@ int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 		goto skip_setup;
 	}
 
+	/* Indicate that the session has been started once */
+	ua_sess->started = 1;
+
 	ret = create_ust_app_metadata(ua_sess, usess->pathname, app);
 	if (ret < 0) {
 		goto error_rcu_unlock;
@@ -1991,7 +1994,6 @@ int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 	if (ret < 0) {
 		goto error_rcu_unlock;
 	}
-	ua_sess->started = 1;
 
 skip_setup:
 	/* This start the UST tracing */
@@ -2037,10 +2039,12 @@ int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app)
 		goto error_rcu_unlock;
 	}
 
-	/* Not started, continuing. */
-	if (ua_sess->started == 0) {
-		goto end;
-	}
+	/*
+	 * If started = 0, it means that stop trace has been called for a session
+	 * that was never started. This is a code flow error and should never
+	 * happen.
+	 */
+	assert(ua_sess->started == 1);
 
 	/* This inhibits UST tracing */
 	ret = ustctl_stop_session(app->key.sock, ua_sess->handle);
@@ -2071,8 +2075,6 @@ int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app)
 				ret);
 	}
 
-	ua_sess->started = 0;
-
 end:
 	rcu_read_unlock();
 	return 0;