Fix return value on ust app session create

Two possible error can occur here where the malloc() failed or the
tracer is gone (app unregistered) so two error code is needed.

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

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 2b66b92c07d5e4b41043256c9a2695d0080f6746..bb012b5d84fc0e8b92ace19dde174c2dcb633fef 100644 (file)
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -865,6 +865,8 @@ static struct ust_app_session *create_ust_app_session(
                ret = ustctl_create_session(app->key.sock);
                if (ret < 0) {
                        ERR("Creating session for app pid %d", app->key.pid);
+                       /* This means that the tracer is gone... */
+                       ua_sess = (void*) -1UL;
                        goto error;
                }
 
@@ -1757,8 +1759,11 @@ int ust_app_create_channel_glb(struct ltt_ust_session *usess,
                 */
                ua_sess = create_ust_app_session(usess, app);
                if (ua_sess == NULL) {
-                       /* Major problem here and it's maybe the tracer or malloc() */
+                       /* The malloc() failed. */
                        goto error;
+               } else if (ua_sess == (void *) -1UL) {
+                       /* The application's socket is not valid. Contiuing */
+                       continue;
                }
 
                /* Create channel onto application */