int lttng_list_tracepoint_fields(struct lttng_handle *handle,
struct lttng_event_field **fields)
{
+ enum lttng_error_code ret_code;
int ret;
struct lttcomm_session_msg lsm;
+ const struct lttcomm_list_command_header *cmd_header = NULL;
+ unsigned int nb_event_fields = 0;
+ struct lttng_payload reply;
if (handle == NULL) {
- return -LTTNG_ERR_INVALID;
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
+ lttng_payload_init(&reply);
+
memset(&lsm, 0, sizeof(lsm));
lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
- ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields);
- if (ret < 0) {
- return ret;
+ {
+ lttng_payload_view message_view =
+ lttng_payload_view_init_from_buffer(
+ (const char *) &lsm, 0,
+ sizeof(lsm));
+
+ ret = lttng_ctl_ask_sessiond_payload(&message_view, &reply);
+ if (ret < 0) {
+ goto end;
+ }
+ }
+
+ {
+ const lttng_buffer_view cmd_header_view =
+ lttng_buffer_view_from_dynamic_buffer(
+ &reply.buffer, 0, sizeof(*cmd_header));
+
+ if (!lttng_buffer_view_is_valid(&cmd_header_view)) {
+ ret = -LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+
+ cmd_header = (struct lttcomm_list_command_header *)
+ cmd_header_view.data;
+ }
+
+ if (cmd_header->count > INT_MAX) {
+ ret = -LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
+
+ nb_event_fields = cmd_header->count;
+
+ {
+ lttng_payload_view reply_view =
+ lttng_payload_view_from_payload(&reply,
+ sizeof(*cmd_header), -1);
+
+ ret_code = lttng_event_fields_create_and_flatten_from_payload(
+ &reply_view, nb_event_fields, fields);
+ if (ret_code != LTTNG_OK) {
+ ret = -ret_code;
+ goto end;
+ }
}
- return ret / sizeof(struct lttng_event_field);
+ ret = nb_event_fields;
+
+end:
+ return ret;
}
/*