From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 11 Mar 2016 23:36:17 +0000 (-0500)
Subject: Fix: Initialize events discarded and packet lost counters to zero
X-Git-Tag: v2.8.0-rc1~80
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=7c79cc89f4765951545b01d272ef2dc212874086

Fix: Initialize events discarded and packet lost counters to zero

The runtime stats functions would only set the counter value
matching the current buffer-switching policy resulting in
uninitialized discarded event counts in "overwrite" mode, and
uninitialized lost packet counts in "discard" mode.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 9a766e4ab..987bb0e1c 100644
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -5945,9 +5945,11 @@ int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
 	if (overwrite) {
 		ret = consumer_get_lost_packets(ust_session_id,
 				consumer_chan_key, consumer, lost);
+		*discarded = 0;
 	} else {
 		ret = consumer_get_discarded_events(ust_session_id,
 				consumer_chan_key, consumer, discarded);
+		*lost = 0;
 	}
 
 end:
@@ -5990,10 +5992,12 @@ int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
 		if (overwrite) {
 			ret = consumer_get_lost_packets(usess->id, ua_chan->key,
 					consumer, lost);
+			*discarded = 0;
 			goto end;
 		} else {
 			ret = consumer_get_discarded_events(usess->id,
 					ua_chan->key, consumer, discarded);
+			*lost = 0;
 			goto end;
 		}
 	}