Thanks for the PR.

Unfortunately, we cannot use variable length arrays. One solution would be to use a BPF map with value char foo[0] for the buffer, and then set the value size with bpf_map__set_value_size from the agent before loading.

Please let me know if you are comfortable to implement the solution above.

What do you mean by agent exactly?

The Go userspace process (main.go)

@ti-mo suggested:

I'd prob use a simple percpu array and adjust CollectionSpec.Maps["scratch"].ValueSize as appropriate before loading