Message-ID: <4B201993.9020005@redhat.com>
Date: Wed, 09 Dec 2009 16:41:39 -0500
From: Masami Hiramatsu <mhiramat@redhat.com>
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To: Ingo Molnar <mingo@elte.hu>
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Subject: Re: [PATCH -tip 0/8] perf-probe updates
References: <20091208220232.10142.2643.stgit@dhcp-100-2-132.bos.redhat.com> <20091209072220.GA4328@elte.hu> <20091209084341.GA21333@elte.hu> <4B1FE022.1030704@redhat.com>
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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: mhiramat@redhat.com

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