linux-kernel - Re: [RFC] improve_stack: make stack dump output useful again

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Message-ID: <CA+55aFxi5VQFu6_MVaVWhwj+bo-orQUmsKRakr_1Txfu1bEcpg@mail.gmail.com>
Date:	Thu, 13 Mar 2014 15:59:43 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] improve_stack: make stack dump output useful again

On Thu, Mar 13, 2014 at 3:20 PM, Sasha Levin <sasha.levin@...cle.com> wrote:
>
> I'll fix it up and re-send this patch.

The problem (as you will find out) is that "addr2line" doesn't take
symbolic names.

So either addr2line needs to be improved (which really would be a good
idea regardless), or your script needs to use "nm" or "gdb" or
something to first translate the symbol+off into a hex number (which
will not match the kernel-provided hex number when base randomization
is in effect, but it will match the pre-randomized data in the vmlinux
file, so then addr2line would work).

              Linus
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