From: David Goulet <dgoulet@efficios.com>
Date: Mon, 6 Aug 2012 17:57:31 +0000 (-0400)
Subject: Fix socket lock and PID in register_consumer
X-Git-Tag: v2.1.0-rc1~39
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e8209f6b352b3aa279d8d452e396adef6f7159c7;p=lttng-tools.git

Fix socket lock and PID in register_consumer

Signed-off-by: David Goulet <dgoulet@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index c79a47405..4b6a39dd5 100644
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -1629,7 +1629,8 @@ static int join_consumer_thread(struct consumer_data *consumer_data)
 	void *status;
 	int ret;
 
-	if (consumer_data->pid != 0) {
+	/* Consumer pid must be a real one. */
+	if (consumer_data->pid > 0) {
 		ret = kill(consumer_data->pid, SIGTERM);
 		if (ret) {
 			ERR("Error killing consumer daemon");
@@ -3630,10 +3631,22 @@ static int cmd_register_consumer(struct ltt_session *session, int domain,
 			goto error;
 		}
 
+		socket->lock = zmalloc(sizeof(pthread_mutex_t));
+		if (socket->lock == NULL) {
+			PERROR("zmalloc pthread mutex");
+			ret = LTTCOMM_FATAL;
+			goto error;
+		}
+		pthread_mutex_init(socket->lock, NULL);
+
 		rcu_read_lock();
 		consumer_add_socket(socket, session->kernel_session->consumer);
 		rcu_read_unlock();
 
+		pthread_mutex_lock(&kconsumer_data.pid_mutex);
+		kconsumer_data.pid = -1;
+		pthread_mutex_unlock(&kconsumer_data.pid_mutex);
+
 		break;
 	default:
 		/* TODO: Userspace tracing */