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Re: R.F.C. Should we abandon User-land probes?
- From: James Dickens <jamesd dot wi at gmail dot com>
- To: "Frank Ch. Eigler" <fche at redhat dot com>
- Cc: SystemTAP <systemtap at sources dot redhat dot com>
- Date: Thu, 20 Oct 2005 14:08:48 -0500
- Subject: Re: R.F.C. Should we abandon User-land probes?
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- References: <cd09bdd10510201115u5a8eebd8r65f64e60e3cfcbdb@mail.gmail.com> <y0m1x2g2f6t.fsf@toenail.toronto.redhat.com>
On 20 Oct 2005 14:53:14 -0400, Frank Ch. Eigler <fche@redhat.com> wrote:
[snip]
>
> Do you mean you want to build complex structures in your script? If
> so, what does this have to do with probing that targets kernel vs user
> space? Or else are you under the impression that systemtap can't
> know/expose such structured data types present in the probed target
> software? Perhaps you need to pay more attention to the project
> instead of chicken-little editorializing.
No I want to access components of complex structures that are pasted
to user land functions. Rarely do complex userland apps just use int,
long, and char *'s. This is especially the case with C++ that pass
class structures. Yes you can make this work in gurumode, but as i
said this disables all the saftety measures systemtap programmers have
worked on.
James
>
> - FChE
>