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Date: Tue, 19 Jan 2010 15:50:29 +0100
From: Frederic Weisbecker <fweisbec@gmail.com>
To: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Joshua Pincus <joshua.pincus@gmail.com>, Andi Kleen <andi@firstfloor.org>,
       "K.Prasad" <prasad@linux.vnet.ibm.com>, peterz@infradead.org,
       paulus@samba.org, acme@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: HW breakpoints perf_events request
Message-ID: <20100119145027.GB8061@nowhere>
References: <bc915a051001131745m6fb70dcbx29b9d35f6fd7106c@mail.gmail.com> <87ljg1fn3u.fsf@basil.nowhere.org> <bc915a051001131821x6cdd3470lf72e8c02a897ea3@mail.gmail.com> <20100114092350.GF12241@basil.fritz.box> <bc915a051001141003s766689beue73800a1308d957e@mail.gmail.com> <20100118110406.GC5256@nowhere> <y0maawbid91.fsf@fche.csb>
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On Mon, Jan 18, 2010 at 11:33:46AM -0500, Frank Ch. Eigler wrote:
> Frederic Weisbecker <fweisbec@gmail.com> writes:
> 
> > [...]
> > What about extending ptrace to support a new type of
> > breakpoint debugging interface?
> 
> This is the sort of reason why the utrace-gdbstub prototype was
> constructed.  It should allow in-kernel implementation of the
> multithreaded gdb extensions.  (By the way, it can already use uprobes
> rather than userspace-managed breakpoints.)


Can utrace somehow meet Joshua's needs? I'm not sure what kind
of interface it can offer for that. The fact is I don't know
very well utrace :)  Do you plan a resubmission soon?

Thanks.

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