On Tue, Jul 16, 2019 at 05:30:50PM -0400, Joel Fernandes wrote:
I also thought about the pinning idea before, but we also want to add support for not just raw tracepoints, but also regular tracepoints (events if you will). I am hesitant to add a new BPF API just for creating regular tracepoints and then pinning those as well.
and they should be done through the pinning as well.
I don't see why a new bpf node for a trace event is a bad idea, really.
See the patches for kprobe/uprobe FD-based api and the reasons behind it. tldr: text is racy, doesn't scale, poor security, etc.
tracefs is how we deal with trace events on Android.
android has made mistakes in the past as well.
This is a natural extension to that and fits with the security model well.
I think it's the opposite. I'm absolutely against text based apis.