dso__name_len
int dso__name_len(const struct dso *dso);
len = dso__name_len(map__dso(h->ms.map));
symlen = dso__name_len(map__dso(h->branch_info->from.ms.map));
symlen = dso__name_len(map__dso(h->branch_info->to.ms.map));
symlen = dso__name_len(map__dso(mem_info__daddr(h->mem_info)->ms.map));