Re: [PATCH v5 0/6] enable creating [k,u]probe with perf_event_open

[Alexei Starovoitov]

On 4/9/18 9:45 PM, Ravi Bangoria wrote:
> Hi Song,
>
> On 12/07/2017 04:15 AM, Song Liu wrote:
> > With current kernel, user space tools can only create/destroy [k,u]probes
> > with a text-based API (kprobe_events and uprobe_events in tracefs). This
> > approach relies on user space to clean up the [k,u]probe after using them.
> > However, this is not easy for user space to clean up properly.
> >
> > To solve this problem, we introduce a file descriptor based API.
> > Specifically, we extended perf_event_open to create [k,u]probe, and attach
> > this [k,u]probe to the file descriptor created by perf_event_open. These
> > [k,u]probe are associated with this file descriptor, so they are not
> > available in tracefs.
>
> Sorry for being late. One simple question..
>
> Will it be good to support k/uprobe arguments with perf_event_open()?
> Do you have any plans about that?

no plans for that. People that use text based interfaces should
probably be using text interfaces consistently.
imo mixing FD-based kprobe api with text is not worth the complexity.