X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-app.c;h=ba63922cb36c9041edf55814c211a6a90ec34089;hb=b53d4e59bf0a980aa774dcccc27123986e77b8ff;hp=823de94785c1a6d6964ed9b165f47d4690d59741;hpb=4b5ab17b3aec396cfa096ecac1b990242072d644;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 823de9478..ba63922cb 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -1,19 +1,9 @@
 /*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _LGPL_SOURCE
@@ -45,6 +35,10 @@
 #include "notification-thread-commands.h"
 #include "rotate.h"
 
+struct lttng_ht *ust_app_ht;
+struct lttng_ht *ust_app_ht_by_sock;
+struct lttng_ht *ust_app_ht_by_notify_sock;
+
 static
 int ust_app_flush_app_session(struct ust_app *app, struct ust_app_session *ua_sess);
 
@@ -1025,7 +1019,7 @@ error_free:
  * Alloc new UST app channel.
  */
 static
-struct ust_app_channel *alloc_ust_app_channel(char *name,
+struct ust_app_channel *alloc_ust_app_channel(const char *name,
 		struct ust_app_session *ua_sess,
 		struct lttng_ust_channel_attr *attr)
 {
@@ -4347,6 +4341,11 @@ int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
 		goto end;
 	}
 
+	if (ua_sess->enabled) {
+		pthread_mutex_unlock(&ua_sess->lock);
+		goto end;
+	}
+
 	/* Upon restart, we skip the setup, already done */
 	if (ua_sess->started) {
 		goto skip_setup;
@@ -4387,6 +4386,7 @@ skip_setup:
 
 	/* Indicate that the session has been started once */
 	ua_sess->started = 1;
+	ua_sess->enabled = 1;
 
 	pthread_mutex_unlock(&ua_sess->lock);
 
@@ -4476,6 +4476,7 @@ int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app)
 	}
 
 	health_code_update();
+	ua_sess->enabled = 0;
 
 	/* Quiescent wait after stopping trace */
 	pthread_mutex_lock(&app->sock_lock);