consumer: fix: possible unaligned access in packed structure

Fix the warnings that unaligned pointers can be passed as parameters
emitted when sampling buffer statistics.

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

diff --git a/src/common/consumer/consumer-timer.c b/src/common/consumer/consumer-timer.c
index cfbf443128696ed3cc9657732d6c28047c9169d2..7d000c145494fba7250e8901cd7d304e86936492 100644 (file)
--- a/src/common/consumer/consumer-timer.c
+++ b/src/common/consumer/consumer-timer.c
@@ -721,6 +721,7 @@ void monitor_timer(struct lttng_consumer_channel *channel)
        sample_positions_cb sample;
        get_consumed_cb get_consumed;
        get_produced_cb get_produced;
+       uint64_t lowest = 0, highest = 0, total_consumed = 0;
 
        assert(channel);
 
@@ -744,11 +745,14 @@ void monitor_timer(struct lttng_consumer_channel *channel)
                abort();
        }
 
-       ret = sample_channel_positions(channel, &msg.highest, &msg.lowest,
-                       &msg.total_consumed, sample, get_consumed, get_produced);
+       ret = sample_channel_positions(channel, &highest, &lowest,
+                       &total_consumed, sample, get_consumed, get_produced);
        if (ret) {
                return;
        }
+       msg.highest = highest;
+       msg.lowest = lowest;
+       msg.total_consumed = total_consumed;
 
        /*
         * Writes performed here are assumed to be atomic which is only