Re: [RFC] [PATCH 7/7] Ftrace plugin for Uprobes

From: Mark Wielaard
Date: Thu Jan 14 2010 - 07:17:34 EST

On Thu, 2010-01-14 at 12:29 +0100, Peter Zijlstra wrote:
> On Thu, 2010-01-14 at 12:23 +0100, Peter Zijlstra wrote:
> > On Mon, 2010-01-11 at 17:56 +0530, Srikar Dronamraju wrote:
> > > This patch implements ftrace plugin for uprobes.
> >
> > Right, like others have said, trace events is a much saner interface.
> >
> > So the easiest way I can see that working is to register uprobes against
> > a file (not a pid).
> Just to clarify, this means you can do things like:
> p:uprobe_event dso:symbol[+offs]
> Irrespective of whether there are any current user of that file.

Yes, that is a good idea, you can then also refine that with a filter on
a target pid. That is what systemtap also does, you define files
(whether they are executables or shared libraries, etc) plus
symbols/offsets/etc as targets and monitor when they get mapped in
(either system wide, per executable or pid based).



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