linux-kernel - Re: [PATCH -tip 2/4] perf probe: Fix to use symtab only if no debuginfo

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Date:	Mon, 26 Apr 2010 14:59:36 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
CC:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Mike Galbraith <efault@....de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [PATCH -tip 2/4] perf probe: Fix to use symtab only if no	debuginfo

Arnaldo Carvalho de Melo wrote:
> Em Wed, Apr 21, 2010 at 03:56:24PM -0400, Masami Hiramatsu escreveu:
>> Fix perf probe to use symtab only if there is no debuginfo,
>> because debuginfo has more precise information than symtab.
> 
> "more precise"? Wouldn't it be "more expressive", i.e. with more
> information (parameter list with types, return type, location of
> parameters, etc), because what is common to both have the same value,
> i.e. the function address and size.

Indeed. debuginfo has just more information than symtab, but
symtab certainly provides precise information for symbol-address.

Thank you,


-- 
Masami Hiramatsu
e-mail: mhiramat@...hat.com
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