From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Bradley Chapman <kakadu_croc@yahoo.com>
Cc: "Randy.Dunlap" <rddunlap@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: What do frame pointers do?
Date: Mon, 3 Nov 2003 10:04:49 +0000 [thread overview]
Message-ID: <20031103100449.A22719@flint.arm.linux.org.uk> (raw)
In-Reply-To: <20031103092909.4955.qmail@web40907.mail.yahoo.com>; from kakadu_croc@yahoo.com on Mon, Nov 03, 2003 at 01:29:09AM -0800
On Mon, Nov 03, 2003 at 01:29:09AM -0800, Bradley Chapman wrote:
> > Frame pointers enable more deterministic back tracing of the stack,
> > which can be helpful for tracking down bugs. I build with
> > CONFIG_FRAME_POINTER enabled all of the time.
On ARM, simply scanning the kernel stack for addresses in the kernels
text segment or a module text tends to (or at least used to) return a
large quantity of noise. This makes reading the backtrace nearly
impossible - not only does it contain real function pointers and
return addresses, but also pointers to literal pools and the like.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core
prev parent reply other threads:[~2003-11-03 10:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-02 17:00 What do frame pointers do? Bradley Chapman
2003-11-03 4:45 ` Randy.Dunlap
2003-11-03 9:29 ` Bradley Chapman
2003-11-03 10:04 ` Russell King [this message]
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