linux-kernel - Re: Make the 32 bit Frame Pointer backtracer fall back to traditional

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Message-ID: <20080110065511.GB23022@elte.hu>
Date:	Thu, 10 Jan 2008 07:55:11 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org
Subject: Re: Make the 32 bit Frame Pointer backtracer fall back to
	traditional


* Arjan van de Ven <arjan@...radead.org> wrote:

> Subject: Make the 32 bit Frame Pointer backtracer fall back to traditional
> From: Arjan van de Ven <arjan@...ux.intel.com>
> 
> The 32 bit Frame Pointer backtracer code checks if the EBP is valid to 
> do a backtrace; however currently on a failure it just gives up and 
> prints nothing. That's not very nice; we can do better and still print 
> a decent backtrace.
> 
> This patch changes the backtracer to fall back to the non-framepointer 
> backtracer if the EBP value isn't within the expected range; so on 
> weird stack corruption cases we get at least something out...

thanks, applied. Another nice catch!

	Ingo
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