linux-kernel - Re: [RFC PATCH] perf report: add sort by file lines

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Date:	Tue, 29 Mar 2011 19:08:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] perf report: add sort by file lines

On Tue, 2011-03-29 at 19:06 +0200, Peter Zijlstra wrote:
> On Tue, 2011-03-29 at 19:03 +0200, Peter Zijlstra wrote:
> > > Is it an unwind of the call frame stack to find out what data member was
> > > accessed?
> > 
> > No need to unwind stacks, DWARF should have information on function
> > local stack. It should be able to tell you the type of things like -8(%
> > rbp). 
> 
> That is, we don't even have a life stack to unwind, so we simply cannot
> unwind at all, but the debug information should be able to tell you the
> type of whatever would live at a certain stack position if we were to
> have a stack.

Furthermore, I've now completely exhausted my knowledge of debuginfo and
hope Masami and Arnaldo will help with further details ;-)

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