Store the version of the tracer in the UID registry

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

diff --git a/src/bin/lttng-sessiond/session.c b/src/bin/lttng-sessiond/session.c
index bb8a55ed78e162d6acd27d074b3e4cb0ff4988df..5a10340a71ab28d67285010cc7a9e311d4b018e9 100644 (file)
--- a/src/bin/lttng-sessiond/session.c
+++ b/src/bin/lttng-sessiond/session.c
@@ -143,6 +143,8 @@ void session_unlock_list(void)
 
 /*
  * Allocate the ltt_sessions_ht_by_id HT.
+ *
+ * The session list lock must be held.
  */
 int ltt_sessions_ht_alloc(void)
 {
@@ -161,8 +163,10 @@ end:
 
 /*
  * Destroy the ltt_sessions_ht_by_id HT.
+ *
+ * The session list lock must be held.
  */
-void ltt_sessions_ht_destroy(void)
+static void ltt_sessions_ht_destroy(void)
 {
        if (!ltt_sessions_ht_by_id) {
                return;
@@ -294,17 +298,21 @@ struct ltt_session *session_find_by_id(uint64_t id)
        struct lttng_ht_iter iter;
        struct ltt_session *ls;
 
+       if (!ltt_sessions_ht_by_id) {
+               goto end;
+       }
+
        lttng_ht_lookup(ltt_sessions_ht_by_id, &id, &iter);
        node = lttng_ht_iter_get_node_u64(&iter);
        if (node == NULL) {
-               goto error;
+               goto end;
        }
        ls = caa_container_of(node, struct ltt_session, node);
 
        DBG3("Session %" PRIu64 " found by id.", id);
        return ls;
 
-error:
+end:
        DBG3("Session %" PRIu64 " NOT found by id", id);
        return NULL;
 }