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Message-ID: <y0maawbid91.fsf@fche.csb>
Date:	Mon, 18 Jan 2010 11:33:46 -0500
From:	fche@...hat.com (Frank Ch. Eigler)
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Joshua Pincus <joshua.pincus@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	"K.Prasad" <prasad@...ux.vnet.ibm.com>, peterz@...radead.org,
	paulus@...ba.org, acme@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: HW breakpoints perf_events request

Frederic Weisbecker <fweisbec@...il.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.)

- FChE
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