To me that's why the original promise of dtrace was so nice, the idea of being able to dynamically turn logging on and off from the outside at locations never intended to log anything without even touching the source code sounded wonderful.

Sadly $dayjob runs servers on linux and isn't going to merge the dtrace patches in there, and python's systemtap probes are… limited.

Apparently bcc can hook into USDT probes though, I should look into that: https://ish-ar.io/python_ebpf_tracing/