}
static void _lttng_event_destroy(struct lttng_event *event);
+static void _lttng_enum_destroy(struct lttng_enum *_enum);
static
void lttng_session_lazy_sync_enablers(struct lttng_session *session);
return NULL;
CDS_INIT_LIST_HEAD(&session->chan_head);
CDS_INIT_LIST_HEAD(&session->events_head);
+ CDS_INIT_LIST_HEAD(&session->enums_head);
CDS_INIT_LIST_HEAD(&session->enablers_head);
for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++)
CDS_INIT_HLIST_HEAD(&session->events_ht.table[i]);
+ for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++)
+ CDS_INIT_HLIST_HEAD(&session->enums_ht.table[i]);
cds_list_add(&session->node, &sessions);
return session;
}
{
struct lttng_channel *chan, *tmpchan;
struct lttng_event *event, *tmpevent;
+ struct lttng_enum *_enum, *tmp_enum;
struct lttng_enabler *enabler, *tmpenabler;
CMM_ACCESS_ONCE(session->active) = 0;
cds_list_for_each_entry_safe(event, tmpevent,
&session->events_head, node)
_lttng_event_destroy(event);
+ cds_list_for_each_entry_safe(_enum, tmp_enum,
+ &session->enums_head, node)
+ _lttng_enum_destroy(_enum);
cds_list_for_each_entry_safe(chan, tmpchan, &session->chan_head, node)
_lttng_channel_unmap(chan);
cds_list_del(&session->node);
return ret;
}
+static
+int lttng_enum_create(const struct lttng_enum_desc *desc,
+ struct lttng_session *session)
+{
+ const char *enum_name = desc->name;
+ struct lttng_enum *_enum;
+ struct cds_hlist_head *head;
+ struct cds_hlist_node *node;
+ int ret = 0;
+ size_t name_len = strlen(enum_name);
+ uint32_t hash;
+ int notify_socket;
+
+ hash = jhash(enum_name, name_len, 0);
+ head = &session->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)];
+ cds_hlist_for_each_entry(_enum, node, head, hlist) {
+ assert(_enum->desc);
+ if (!strncmp(_enum->desc->name, desc->name,
+ LTTNG_UST_SYM_NAME_LEN - 1)) {
+ ret = -EEXIST;
+ goto exist;
+ }
+ }
+
+ notify_socket = lttng_get_notify_socket(session->owner);
+ if (notify_socket < 0) {
+ ret = notify_socket;
+ goto socket_error;
+ }
+
+ _enum = zmalloc(sizeof(*_enum));
+ if (!_enum) {
+ ret = -ENOMEM;
+ goto cache_error;
+ }
+ _enum->session = session;
+ _enum->desc = desc;
+
+ ret = ustcomm_register_enum(notify_socket,
+ session->objd,
+ enum_name,
+ desc->nr_entries,
+ desc->entries,
+ &_enum->id);
+ if (ret < 0) {
+ DBG("Error (%d) registering enumeration to sessiond", ret);
+ goto sessiond_register_error;
+ }
+ cds_list_add(&_enum->node, &session->enums_head);
+ cds_hlist_add_head(&_enum->hlist, head);
+ return 0;
+
+sessiond_register_error:
+ free(_enum);
+cache_error:
+socket_error:
+exist:
+ return ret;
+}
+
+static
+int lttng_event_create_all_enums(const struct lttng_event_desc *desc,
+ struct lttng_session *session)
+{
+ unsigned int nr_fields, i;
+ const struct lttng_event_field *fields;
+
+ /* For each field, ensure enum is part of the session. */
+ nr_fields = desc->nr_fields;
+ fields = desc->fields;
+ for (i = 0; i < nr_fields; i++) {
+ const struct lttng_type *type = &fields[i].type;
+
+ switch (type->atype) {
+ case atype_enum:
+ {
+ const struct lttng_enum_desc *enum_desc;
+ int ret;
+
+ enum_desc = type->u.basic.enumeration.desc;
+ ret = lttng_enum_create(enum_desc, session);
+ if (ret && ret != -EEXIST) {
+ DBG("Unable to create enum error: (%d)", ret);
+ return ret;
+ }
+ break;
+ }
+ default:
+ /* TODO: nested types when they become supported. */
+ continue;
+ }
+ }
+ return 0;
+}
+
/*
* Supports event creation while tracing session is active.
*/
goto socket_error;
}
+ ret = lttng_event_create_all_enums(desc, session);
+ if (ret < 0) {
+ DBG("Error (%d) adding enum to session", ret);
+ goto create_enum_error;
+ }
+
/*
* Check if loglevel match. Refuse to connect event if not.
*/
/* Fetch event ID from sessiond */
ret = ustcomm_register_event(notify_socket,
+ session,
session->objd,
chan->objd,
event_name,
sessiond_register_error:
free(event);
cache_error:
+create_enum_error:
socket_error:
exist:
return ret;
free(event);
}
+static
+void _lttng_enum_destroy(struct lttng_enum *_enum)
+{
+ cds_list_del(&_enum->node);
+ free(_enum);
+}
+
void lttng_ust_events_exit(void)
{
struct lttng_session *session, *tmpsession;
return lttng_add_procname_to_ctx(ctx);
case LTTNG_UST_CONTEXT_IP:
return lttng_add_ip_to_ctx(ctx);
+ case LTTNG_UST_CONTEXT_CPU_ID:
+ return lttng_add_cpu_id_to_ctx(ctx);
default:
return -EINVAL;
}