-/*
- * List IDs in the tracker.
- *
- * tracker_type is the type of tracker.
- * ids is set to an allocated array of IDs currently tracked. On
- * success, ids and all the strings it contains must be freed by the caller.
- * nr_ids is set to the number of entries contained by the ids array.
- *
- * Returns 0 on success, else a negative LTTng error code.
- */
-int lttng_list_tracker_ids(struct lttng_handle *handle,
- enum lttng_tracker_type tracker_type,
- struct lttng_tracker_id **_ids,
- size_t *_nr_ids)
-{
- int ret, i;
- struct lttcomm_session_msg lsm;
- struct lttcomm_tracker_command_header *cmd_header = NULL;
- char *cmd_payload = NULL, *p;
- size_t cmd_header_len;
- size_t nr_ids = 0;
- struct lttng_tracker_id *ids = NULL;
-
- if (handle == NULL) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
- lsm.cmd_type = LTTNG_LIST_TRACKER_IDS;
- lsm.u.id_tracker_list.tracker_type = tracker_type;
- lttng_ctl_copy_string(lsm.session.name, handle->session_name,
- sizeof(lsm.session.name));
- COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
-
- ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0,
- (void **) &cmd_payload, (void **) &cmd_header,
- &cmd_header_len);
- if (ret < 0) {
- goto error;
- }
-
- /* Set number of tracker_id and free command header */
- nr_ids = cmd_header->nb_tracker_id;
- if (nr_ids > INT_MAX) {
- ret = -LTTNG_ERR_OVERFLOW;
- goto error;
- }
- free(cmd_header);
- cmd_header = NULL;
-
- ids = zmalloc(sizeof(*ids) * nr_ids);
- if (!ids) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
-
- p = cmd_payload;
- for (i = 0; i < nr_ids; i++) {
- struct lttcomm_tracker_id_header *tracker_id;
- struct lttng_tracker_id *id;
-
- tracker_id = (struct lttcomm_tracker_id_header *) p;
- p += sizeof(struct lttcomm_tracker_id_header);
- id = &ids[i];
-
- id->type = tracker_id->type;
- switch (tracker_id->type) {
- case LTTNG_ID_ALL:
- break;
- case LTTNG_ID_VALUE:
- id->value = tracker_id->u.value;
- break;
- case LTTNG_ID_STRING:
- id->string = strdup(p);
- if (!id->string) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
- p += tracker_id->u.var_data_len;
- break;
- default:
- goto error;
- }
- }
- free(cmd_payload);
- *_ids = ids;
- *_nr_ids = nr_ids;
- return 0;
-
-error:
- if (ids) {
- for (i = 0; i < nr_ids; i++) {
- free(ids[i].string);
- }
- free(ids);
- }
- free(cmd_payload);
- free(cmd_header);
- return ret;
-}
-
-/*
- * List PIDs in the tracker.
- *
- * enabled is set to whether the PID tracker is enabled.
- * pids is set to an allocated array of PIDs currently tracked. On
- * success, pids must be freed by the caller.
- * nr_pids is set to the number of entries contained by the pids array.
- *
- * Returns 0 on success, else a negative LTTng error code.
- */
-int lttng_list_tracker_pids(struct lttng_handle *handle,
- int *_enabled, int32_t **_pids, size_t *_nr_pids)
-{
- struct lttng_tracker_id *ids = NULL;
- size_t nr_ids = 0;
- int *pids = NULL;
- int ret = 0, i;
-
- ret = lttng_list_tracker_ids(handle, LTTNG_TRACKER_PID, &ids, &nr_ids);
- if (ret < 0)
- return ret;
-
- if (nr_ids == 1 && ids[0].type == LTTNG_ID_ALL) {
- *_enabled = 0;
- goto end;
- }
- *_enabled = 1;
-
- pids = zmalloc(nr_ids * sizeof(*pids));
- if (!pids) {
- ret = -LTTNG_ERR_NOMEM;
- goto end;
- }
- for (i = 0; i < nr_ids; i++) {
- struct lttng_tracker_id *id = &ids[i];
-
- if (id->type != LTTNG_ID_VALUE) {
- ret = -LTTNG_ERR_UNK;
- goto end;
- }
- pids[i] = id->value;
- }
- *_pids = pids;
- *_nr_pids = nr_ids;
-end:
- for (i = 0; i < nr_ids; i++) {
- free(ids[i].string);
- }
- free(ids);
- if (ret < 0) {
- free(pids);
- }
- return ret;
-}
-