Re: [Dle-develop] [PATCH -tip 0/8] perf-probe updates

[Masami H. <mhi...@re...>]

Masami Hiramatsu wrote:
>> Here the failure was because the symbol does not exist.
> 
> Yeah, so that's what I'm expecting to be implemented with below item :-)
> 
>    - Symbol search by libelf/kallsyms
> 
> I guess it will be done by using symbol.c.
> (Actually, current

Oops, I might miss something, forgot it.
actually, current perf probe doesn't decode kallsyms/elf, it just depends on
kprobe-tracer. And kprobe-tracer will return -EINVAL not only if the symbol
was not found, but also other reasons.

So, if we want to show below message, we need to decode elf or kallsyms.

> >
> > There's similar problems in most other failure cases. Trying to remove a
> > non-existent probe gives:
> >
> >   # perf probe -d test
> >   Warning: event "probe:test" is not found.
> >

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhi...@re...