in cli/bpfcov.c [976:987]
static int get_map_info(int fd, struct bpf_map_info *info)
{
int err;
unsigned int size = sizeof(*info);
memset(info, 0, size);
err = bpf_obj_get_info_by_fd(fd, info, &size);
if (err)
{
close(fd);
}
return err;
}