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

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Message-ID: <1263468575.4244.306.camel@laptop>
Date:	Thu, 14 Jan 2010 12:29:35 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	utrace-devel <utrace-devel@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Maneesh Soni <maneesh@...ibm.com>,
	Mark Wielaard <mjw@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 7/7] Ftrace plugin for Uprobes

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.

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