From: "Frank Ch. Eigler" <fche@redhat.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Kyle Moffett <kyle@moffetthome.net>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Peter Zijlstra <peterz@infradead.org>,
Fr??d??ric Weisbecker <fweisbec@gmail.com>,
Oleg Nesterov <oleg@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
linux-next@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
utrace-devel@redhat.com,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: linux-next: add utrace tree
Date: Sat, 23 Jan 2010 06:51:49 -0500 [thread overview]
Message-ID: <20100123115149.GB7828@redhat.com> (raw)
In-Reply-To: <20100123110121.1ce89bb9@lxorguk.ukuu.org.uk>
Hi -
On Sat, Jan 23, 2010 at 11:01:21AM +0000, Alan Cox wrote:
> [...]
> What I don't understand is why [libgdb?] doesn't solve 99% of your problem.
> ptrace is not perfect but most of the real ptrace limitations actually
> come about because either the CPU can't do something or because the
> supporting logic would be too expensive - things like having extra
> private debugger pages.
At least one reason is that ptrace is single-usage-only, so for
example you cannot concurrently debug & strace the same program.
OTOH, utrace is designed to permit clean nesting/sharing semantics for
concurrent debugger-type tools operating on the same processes.
- FChE
next prev parent reply other threads:[~2010-01-23 11:51 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100119211646.GF16096@redhat.com>
2010-01-20 0:12 ` linux-next: add utrace tree Stephen Rothwell
2010-01-20 5:49 ` Ingo Molnar
2010-01-20 6:15 ` Ananth N Mavinakayanahalli
2010-01-20 6:28 ` Ingo Molnar
2010-01-20 6:40 ` Ananth N Mavinakayanahalli
2010-01-20 10:43 ` Frederic Weisbecker
2010-01-20 6:59 ` Stephen Rothwell
2010-01-20 13:24 ` Frank Ch. Eigler
2010-01-20 7:29 ` Ingo Molnar
2010-01-20 14:38 ` Stephen Rothwell
2010-01-21 1:22 ` Roland McGrath
2010-01-22 0:17 ` Stephen Rothwell
2010-01-22 0:30 ` Andrew Morton
2010-01-22 0:31 ` Andrew Morton
2010-01-22 0:51 ` Frank Ch. Eigler
2010-01-22 1:05 ` Andrew Morton
2010-01-22 1:25 ` Frank Ch. Eigler
2010-01-22 1:32 ` Linus Torvalds
2010-01-22 2:22 ` Frank Ch. Eigler
2010-01-22 2:35 ` Linus Torvalds
2010-01-22 20:51 ` Oleg Nesterov
2010-01-23 6:04 ` Ingo Molnar
2010-01-23 12:03 ` Frank Ch. Eigler
2010-01-24 16:36 ` Thomas Gleixner
2010-01-22 1:28 ` Linus Torvalds
2010-01-22 5:21 ` Ananth N Mavinakayanahalli
2010-01-22 13:43 ` Valdis.Kletnieks
2010-01-22 19:39 ` Oleg Nesterov
2010-01-26 13:58 ` Pavel Machek
2010-01-22 18:28 ` Oleg Nesterov
2010-01-22 20:01 ` Frank Ch. Eigler
2010-01-22 20:16 ` Peter Zijlstra
2010-01-22 21:44 ` Frank Ch. Eigler
2010-01-22 21:59 ` Linus Torvalds
2010-01-22 22:13 ` Frank Ch. Eigler
2010-01-23 0:11 ` Linus Torvalds
2010-01-23 0:22 ` Linus Torvalds
2010-01-23 6:20 ` Kyle Moffett
2010-01-23 11:01 ` Alan Cox
2010-01-23 11:51 ` Frank Ch. Eigler [this message]
2010-01-23 15:57 ` Arnaldo Carvalho de Melo
2010-01-23 11:23 ` Ingo Molnar
2010-01-23 11:47 ` Frank Ch. Eigler
2010-01-23 19:48 ` tytso
2010-01-24 18:01 ` Frank Ch. Eigler
2010-01-25 1:42 ` Kyle Moffett
2010-01-25 4:55 ` tytso
2010-01-25 16:52 ` Linus Torvalds
2010-01-25 17:02 ` Frank Ch. Eigler
2010-01-25 17:36 ` Linus Torvalds
2010-01-25 17:45 ` Linus Torvalds
2010-01-25 17:54 ` Steven Rostedt
2010-01-25 18:03 ` Alan Cox
2010-01-25 18:12 ` Linus Torvalds
2010-01-25 18:30 ` Steven Rostedt
2010-01-25 18:45 ` Thomas Gleixner
2010-01-25 20:34 ` Ingo Molnar
2010-01-25 20:30 ` Mark Wielaard
2010-01-25 20:42 ` Linus Torvalds
2010-01-26 0:02 ` Renzo Davoli
2010-01-26 0:07 ` Linus Torvalds
2010-01-26 16:08 ` Johannes Stezenbach
2010-01-26 16:28 ` Linus Torvalds
2010-01-26 16:34 ` Christoph Hellwig
2010-01-28 23:53 ` Benjamin Herrenschmidt
2010-01-29 0:21 ` Linus Torvalds
2010-01-25 4:59 ` Ananth N Mavinakayanahalli
2010-01-25 10:13 ` Peter Zijlstra
2010-01-24 5:04 ` Linus Torvalds
2010-01-24 10:25 ` tytso
2010-01-24 13:20 ` Frank Ch. Eigler
2010-01-25 21:05 ` Tom Tromey
2010-01-25 21:41 ` Linus Torvalds
2010-01-26 14:21 ` Ananth N Mavinakayanahalli
2010-01-26 23:20 ` Tom Tromey
2010-01-26 23:37 ` Linus Torvalds
2010-01-27 6:52 ` Peter Zijlstra
2010-01-27 8:54 ` Ingo Molnar
2010-01-28 1:52 ` Jim Keniston
2010-01-28 8:55 ` Ingo Molnar
2010-01-29 0:59 ` Jim Keniston
2010-01-29 7:39 ` Ingo Molnar
2010-01-29 7:52 ` Ananth N Mavinakayanahalli
2010-01-29 7:55 ` Ananth N Mavinakayanahalli
2010-01-29 9:16 ` Ingo Molnar
2010-01-29 9:11 ` Ingo Molnar
2010-01-29 9:31 ` Ananth N Mavinakayanahalli
2010-01-29 9:51 ` Ingo Molnar
2010-01-29 18:13 ` Frank Ch. Eigler
2010-01-29 4:55 ` Ananth N Mavinakayanahalli
2010-01-29 7:42 ` Ingo Molnar
2010-01-30 17:49 ` Steven Rostedt
2010-01-30 17:59 ` Linus Torvalds
2010-02-02 6:47 ` Masami Hiramatsu
2010-01-27 10:43 ` Linus Torvalds
2010-01-27 10:55 ` Peter Zijlstra
2010-01-27 10:58 ` Peter Zijlstra
2010-01-27 11:04 ` Linus Torvalds
2010-01-27 16:01 ` Frederic Weisbecker
2010-01-27 11:05 ` Ananth N Mavinakayanahalli
2010-01-27 11:08 ` Peter Zijlstra
2010-01-27 11:20 ` Ananth N Mavinakayanahalli
2010-02-08 10:09 ` Avi Kivity
2010-01-27 11:07 ` Srikar Dronamraju
2010-01-27 13:59 ` Steven Rostedt
2010-01-27 17:42 ` H. Peter Anvin
2010-01-27 18:53 ` Steven Rostedt
2010-02-08 6:54 ` Pavel Machek
2010-02-08 9:30 ` H. Peter Anvin
2010-02-08 9:53 ` Arjan van de Ven
2010-01-27 19:18 ` H. Peter Anvin
2010-01-27 0:38 ` Frank Ch. Eigler
2010-01-26 15:00 ` Frank Ch. Eigler
2010-01-26 17:33 ` Andi Kleen
2010-01-26 18:46 ` Linus Torvalds
2010-01-26 21:02 ` Andi Kleen
2010-01-26 21:53 ` Oleg Nesterov
2010-01-26 22:03 ` Andi Kleen
2010-01-26 23:32 ` Oleg Nesterov
2010-01-26 21:30 ` Oleg Nesterov
2010-01-26 23:27 ` Tom Tromey
2010-01-23 8:05 ` Alexey Dobriyan
2010-01-22 17:45 ` Oleg Nesterov
2010-01-20 8:52 ` Peter Zijlstra
2010-01-20 13:01 ` Frank Ch. Eigler
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