MAX_STACKS
u64 off_cpu_raw[MAX_STACKS + 5];
for (int i = 0; i < MAX_STACKS && from->array[i]; ++i, ++len)
u64 array[MAX_STACKS];
if (stack_id > 0 && bpf_get_stack(ctx, &pelem->stack, MAX_STACKS * sizeof(u64), BPF_F_USER_STACK)) {
__uint(value_size, MAX_STACKS * sizeof(__u64));