linux-kernel - Re: [PATCH v4 3.0-rc2-tip 20/22] 20: perf: perf interface for uprobes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20110607160612.GB8876@linux.vnet.ibm.com>
Date:	Tue, 7 Jun 2011 21:36:12 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linux-mm <linux-mm@...ck.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jonathan Corbet <corbet@....net>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 3.0-rc2-tip 20/22] 20: perf: perf interface for
 uprobes

* Arnaldo Carvalho de Melo <acme@...radead.org> [2011-06-07 11:21:16]:

> Em Tue, Jun 07, 2011 at 07:08:53PM +0530, Ananth N Mavinakayanahalli escreveu:
> > On Tue, Jun 07, 2011 at 09:30:39AM -0400, Christoph Hellwig wrote:
> > > On Tue, Jun 07, 2011 at 06:32:16PM +0530, Srikar Dronamraju wrote:
> > > > Enhances perf probe to user space executables and libraries.
> > > > Provides very basic support for uprobes.
> 
> > > Nice.  Does this require full debug info for symbolic probes,
> > > or can it also work with simple symbolc information?
> 
> > It works only with symbol information for now.
> > It doesn't (yet) know how to use debuginfo :-)
> 
> 'perf probe' uses perf symbol library, so it really don't have to know
> from where symbol resolution information is obtained, only if it needs
> things that are _just_ on debuginfo, such as line information, etc.
> 
> But then that is also already supported in 'perf probe'.
> 
> Or is there something else in particular you're thinking?
> 

What Ananth was saying was that perf probe for uprobes still has to take
advantage of tracing using line number; Also it is still restricted to
showing only register contents and we still have to add support for variables. I know that perf symbol library has support for that
just that we have to enable it for uprobes.

-- 
Thanks and Regards
Srikar
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/