int lttng_add_tid_to_ctx(struct lttng_ctx **ctx)
{
struct lttng_ctx_field *field;
- int ret;
field = lttng_append_context(ctx);
if (!field)
- return ret;
+ return -ENOMEM;
+ if (lttng_find_context(*ctx, "tid")) {
+ lttng_remove_context_field(ctx, field);
+ return -EEXIST;
+ }
field->event_field.name = "tid";
field->event_field.type.atype = atype_integer;
field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;