SoW-2020-0003: Trace Hit Counters

[lttng-tools.git] / src / bin / lttng-sessiond / clear.c

diff --git a/src/bin/lttng-sessiond/clear.c b/src/bin/lttng-sessiond/clear.c
index 38f4796dc6008ea889d6fc3840fa3f59c926ee67..3a08a119a686d2bffc6a849e0b346e1456d174a1 100644 (file)
--- a/src/bin/lttng-sessiond/clear.c
+++ b/src/bin/lttng-sessiond/clear.c
@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2019 - Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@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
@@ -198,12 +188,21 @@ int cmd_clear_session(struct ltt_session *session, int *sock_fd)
                /* Flag session that trace should start automatically */
                if (usess) {
                        int int_ret = ust_app_start_trace_all(usess);
-
                        if (int_ret < 0) {
                                ret = LTTNG_ERR_UST_START_FAIL;
                                goto end;
                        }
                }
+
+               /*
+                * Open a packet in every stream of the session to ensure that
+                * viewers can correctly identify the boundaries of the periods
+                * during which tracing was active for this session.
+                */
+               ret = session_open_packets(session);
+               if (ret != LTTNG_OK) {
+                       goto end;
+               }
        }
        ret = LTTNG_OK;
 end: