die_walk_lines
int die_walk_lines(Dwarf_Die *rt_die, line_walk_callback_t callback, void *data);
ret = die_walk_lines(sp_die ?: &lf->cu_die, line_range_walk_cb, lf);
return die_walk_lines(&pf->cu_die, probe_point_line_walker, pf);
return die_walk_lines(sp_die, probe_point_lazy_walker, pf);