bpf_bprintf_prepare
int bpf_bprintf_prepare(const char *fmt, u32 fmt_size, const u64 *raw_args,
err = bpf_bprintf_prepare(fmt, UINT_MAX, args, num_args, &data);
ret = bpf_bprintf_prepare(fmt__str, fmt_size, args, num_args, &data);
err = bpf_bprintf_prepare(fmt, UINT_MAX, NULL, num_args, &data);
ret = bpf_bprintf_prepare(fmt, UINT_MAX, data_buf, data__sz / 8,
ret = bpf_bprintf_prepare(fmt, fmt_size, args,
ret = bpf_bprintf_prepare(fmt, fmt_size, args, num_args, &data);
err = bpf_bprintf_prepare(fmt, fmt_size, args, num_args, &data);