Fix: add events with 0 field to field list

[lttng-ust.git] / liblttng-ust / ltt-events.c

diff --git a/liblttng-ust/ltt-events.c b/liblttng-ust/ltt-events.c
index 0fdfd2fd5bcdb115ace5ea1b4d70663c50b0a8eb..ab099e1aba89afedb6a9456c0768509277500a8c 100644 (file)
--- a/liblttng-ust/ltt-events.c
+++ b/liblttng-ust/ltt-events.c
@@ -251,14 +251,15 @@ int pending_probe_fix_events(const struct lttng_event_desc *desc)
                                        sizeof(event_param.name));
                                /* create event */
                                ret = ltt_event_create(sw->chan,
-                                       &event_param, NULL,
-                                       &ev);
+                                       &event_param, &ev);
                                if (ret) {
                                        DBG("Error creating event");
                                        continue;
                                }
                                cds_list_add(&ev->wildcard_list,
                                        &sw->events);
+                               lttng_filter_event_link_bytecode(ev,
+                                       sw->filter_bytecode);
                        }
                }
        }
@@ -295,6 +296,8 @@ int pending_probe_fix_events(const struct lttng_event_desc *desc)
                event->id = chan->free_event_id++;
                ret |= _ltt_event_metadata_statedump(chan->session, chan,
                                event);
+               lttng_filter_event_link_bytecode(event,
+                       event->filter_bytecode);
        }
        return ret;
 }
@@ -500,7 +503,6 @@ void _ltt_channel_destroy(struct ltt_channel *chan)
  */
 int ltt_event_create(struct ltt_channel *chan,
                struct lttng_ust_event *event_param,
-               void (*filter)(struct ltt_event *event),
                struct ltt_event **_event)
 {
        const struct lttng_event_desc *desc = NULL;     /* silence gcc */
@@ -548,7 +550,6 @@ int ltt_event_create(struct ltt_channel *chan,
                goto cache_error;
        }
        event->chan = chan;
-       event->filter = filter;
        /*
         * used_event_id counts the maximum number of event IDs that can
         * register if all probes register.
@@ -653,6 +654,8 @@ void _ltt_event_destroy(struct ltt_event *event)
        }
        cds_list_del(&event->list);
        lttng_destroy_context(event->ctx);
+       free(event->filter_bytecode);
+       free(event->filter_data);
        free(event);
 }
 
@@ -723,6 +726,9 @@ int _ltt_field_statedump(struct ltt_session *session,
 {
        int ret = 0;
 
+       if (field->nowrite)
+               return 0;
+
        switch (field->type.atype) {
        case atype_integer:
                ret = lttng_metadata_printf(session,
@@ -1109,6 +1115,7 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
        struct ltt_event *event;
        int ret = 0;
        char procname[LTTNG_UST_PROCNAME_LEN] = "";
+       char hostname[HOST_NAME_MAX];
 
        if (!CMM_ACCESS_ONCE(session->active))
                return 0;
@@ -1165,10 +1172,15 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
                goto end;
 
        /* ignore error, just use empty string if error. */
+       hostname[0] = '\0';
+       ret = gethostname(hostname, sizeof(hostname));
+       if (ret && errno == ENAMETOOLONG)
+               hostname[HOST_NAME_MAX - 1] = '\0';
        lttng_ust_getprocname(procname);
        procname[LTTNG_UST_PROCNAME_LEN - 1] = '\0';
        ret = lttng_metadata_printf(session,
                "env {\n"
+               "       hostname = \"%s\";\n"
                "       vpid = %d;\n"
                "       procname = \"%s\";\n"
                "       domain = \"ust\";\n"
@@ -1177,6 +1189,7 @@ int _ltt_session_metadata_statedump(struct ltt_session *session)
                "       tracer_minor = %u;\n"
                "       tracer_patchlevel = %u;\n"
                "};\n\n",
+               hostname,
                (int) getpid(),
                procname,
                LTTNG_UST_MAJOR_VERSION,
@@ -1417,6 +1430,7 @@ void _remove_wildcard(struct session_wildcard *wildcard)
                cds_list_del(&wildcard->entry->list);
                free(wildcard->entry);
        }
+       free(wildcard->filter_bytecode);
        free(wildcard);
 }