cxa_thread_dtor
walk_cb_call(struct cxa_thread_dtor *dtor)
walk_cb_nocall(struct cxa_thread_dtor *dtor __unused)
cxa_thread_walk(void (*cb)(struct cxa_thread_dtor *))
struct cxa_thread_dtor *dtor;
LIST_ENTRY(cxa_thread_dtor) entry;
static _Thread_local LIST_HEAD(dtor_list, cxa_thread_dtor) dtors =
struct cxa_thread_dtor *new_dtor;