Add lttng list -j command to list possible events

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

diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c
index 8051973ded6cdfa184462f42482ef1857454e0e4..8dd3fcc60c914c9df4979ac46150aea1c518c147 100644 (file)
--- a/src/bin/lttng-sessiond/cmd.c
+++ b/src/bin/lttng-sessiond/cmd.c
@@ -182,6 +182,55 @@ static void list_lttng_channels(int domain, struct ltt_session *session,
        }
 }
 
+/*
+ * Create a list of JUL domain events.
+ *
+ * Return number of events in list on success or else a negative value.
+ */
+static int list_lttng_jul_events(struct jul_domain *dom,
+               struct lttng_event **events)
+{
+       int i = 0, ret = 0;
+       unsigned int nb_event = 0;
+       struct jul_event *event;
+       struct lttng_event *tmp_events;
+       struct lttng_ht_iter iter;
+
+       assert(dom);
+       assert(events);
+
+       DBG3("Listing JUL events");
+
+       nb_event = lttng_ht_get_count(dom->events);
+       if (nb_event == 0) {
+               ret = nb_event;
+               goto error;
+       }
+
+       tmp_events = zmalloc(nb_event * sizeof(*tmp_events));
+       if (!tmp_events) {
+               PERROR("zmalloc JUL events session");
+               ret = -LTTNG_ERR_FATAL;
+               goto error;
+       }
+
+       rcu_read_lock();
+       cds_lfht_for_each_entry(dom->events->ht, &iter.iter, event, node.node) {
+               strncpy(tmp_events[i].name, event->name, sizeof(tmp_events[i].name));
+               tmp_events[i].name[sizeof(tmp_events[i].name) - 1] = '\0';
+               tmp_events[i].enabled = event->enabled;
+               i++;
+       }
+       rcu_read_unlock();
+
+       *events = tmp_events;
+       ret = nb_event;
+
+error:
+       assert(nb_event == i);
+       return ret;
+}
+
 /*
  * Create a list of ust global domain events.
  */
@@ -1664,6 +1713,13 @@ ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events)
                        goto error;
                }
                break;
+       case LTTNG_DOMAIN_JUL:
+               nb_events = jul_list_events(events);
+               if (nb_events < 0) {
+                       ret = LTTNG_ERR_UST_LIST_FAIL;
+                       goto error;
+               }
+               break;
        default:
                ret = LTTNG_ERR_UND;
                goto error;
@@ -2212,6 +2268,10 @@ ssize_t cmd_list_domains(struct ltt_session *session,
        if (session->ust_session != NULL) {
                DBG3("Listing domains found UST global domain");
                nb_dom++;
+
+               if (session->ust_session->domain_jul.being_used) {
+                       nb_dom++;
+               }
        }
 
        *domains = zmalloc(nb_dom * sizeof(struct lttng_domain));
@@ -2229,6 +2289,12 @@ ssize_t cmd_list_domains(struct ltt_session *session,
                (*domains)[index].type = LTTNG_DOMAIN_UST;
                (*domains)[index].buf_type = session->ust_session->buffer_type;
                index++;
+
+               if (session->ust_session->domain_jul.being_used) {
+                       (*domains)[index].type = LTTNG_DOMAIN_JUL;
+                       (*domains)[index].buf_type = session->ust_session->buffer_type;
+                       index++;
+               }
        }
 
        return nb_dom;
@@ -2319,6 +2385,12 @@ ssize_t cmd_list_events(int domain, struct ltt_session *session,
                }
                break;
        }
+       case LTTNG_DOMAIN_JUL:
+               if (session->ust_session) {
+                       nb_event = list_lttng_jul_events(
+                                       &session->ust_session->domain_jul, events);
+               }
+               break;
        default:
                ret = LTTNG_ERR_UND;
                goto error;