linux-kernel - Re: [PATCHv7 2.6.35-rc3-tip 11/11] perf: perf interface for uprobes

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Date:	Thu, 01 Jul 2010 14:59:40 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv7 2.6.35-rc3-tip 11/11]  perf: perf interface for uprobes

Srikar Dronamraju wrote:
> perf: perf interface for uprobes
> 
> Changelog from v4: Merged to 2.6.35-rc3-tip.
> 
> Changelog from v3: (addressed comments from Masami Hiramatsu)
> 	* Every process id has a different group name.
> 	* event name starts with function name.
> 	* If vaddr is specified, event name has vaddr appended
> 	  along with function name, (this is to avoid subsequent probes
> 	  using same event name.)
> 	* warning if -p and --list options are used together.
> 
> 	Also dso can either be a short name or absolute path.
> 
> Enhances perf probe to accept pid and user vaddr.
> Provides very basic support for uprobes.

It's unsure what will happen if user sets a probe by line number...
I'd like to suggest you if need_dwarf && uid, it should show an error message.
But other parts are OK for me.

> TODO:
> Update perf-probes.txt.
> Global tracing.

Debuginfo support too ?:)

Thank you,
-- 
Masami HIRAMATSU
2nd Research Dept.
Hitachi, Ltd., Systems Development Laboratory
E-mail: masami.hiramatsu.pt@...achi.com
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