int thread__set_comm(struct thread *self, const char *comm);
int thread__comm_len(struct thread *self);
struct thread *threads__findnew(pid_t pid);
-struct thread *register_idle_thread(void);
void thread__insert_map(struct thread *self, struct map *map);
int thread__fork(struct thread *self, struct thread *parent);
size_t map_groups__fprintf_maps(struct map_groups *self, FILE *fp);