On Wed, Jan 12, 2022 at 12:00:17AM +0900, Masami Hiramatsu wrote: > Hi Jiri, > > Here is a short series of patches, which shows what I replied > to your series. > > This introduces the fprobe, the function entry/exit probe with > multiple probe point support. This also introduces the rethook > for hooking function return, which I cloned from kretprobe. > > I also rewrite your [08/13] bpf patch to use this fprobe instead > of kprobes. I didn't tested that one, but the sample module seems > to work. Please test bpf part with your libbpf updates. > > BTW, while implementing the fprobe, I introduced the per-probe > point private data, but I'm not sure why you need it. It seems > that data is not used from bpf... > > If this is good for you, I would like to proceed this with > the rethook and rewrite the kretprobe to use the rethook to > hook the functions. That should be much cleaner (and easy to > prepare for the fgraph tracer integration) What is the speed of attach/detach of thousands fprobes?
