linux-kernel - Re: [RFC] [PATCH 4/7] Uprobes Implementation

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Date:	Fri, 15 Jan 2010 16:35:47 +0530
From:	Maneesh Soni <maneesh@...ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	utrace-devel <utrace-devel@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 4/7] Uprobes Implementation

On Fri, Jan 15, 2010 at 11:33:27AM +0100, Peter Zijlstra wrote:
> On Fri, 2010-01-15 at 15:56 +0530, Srikar Dronamraju wrote:
> > Hi Peter, 
> > 
> > Or there could be two threads that could be racing to
> > insert/delete a breakpoint. These synchronization issues are all handled
> > by the Uprobes layer.
> 
> Shouldn't be hard to put that in the ubp layer, right?
> 
> > Uprobes layer would need to be notified of process life-time events
> > like fork/clone/exec/exit. 
> 
> No so much the process lifetimes as the vma life times are interesting,
> placing a hook in the vm code to track that isn't too hard, 
> 

I think similar hooks were given thumbs down in the previous incarnation
of uprobes (which was implemented without utrace).  

http://lkml.indiana.edu/hypermail/linux/kernel/0603.2/1254.html

Thanks
Maneesh

-- 
Maneesh Soni
Linux Technology Center
IBM India Systems and Technology Lab,
Bangalore, India.
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