From: Gerd Knorr <kraxel@bytesex.org>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com
Subject: Re: double fault ...
Date: Mon, 2 May 2005 17:53:33 +0200 [thread overview]
Message-ID: <20050502155332.GD15699@bytesex> (raw)
In-Reply-To: <fd618fab1e46cb2c5ee9dcad9b0a4e51@cl.cam.ac.uk>
On Mon, May 02, 2005 at 04:23:42PM +0100, Keir Fraser wrote:
>
> On 2 May 2005, at 15:51, Gerd Knorr wrote:
>
> >... happens with panics when compiled with debugging.
> >panic() calls debugger_trap_immediate(), which triggers
> >do_int3, which calls panic(), which recurses until the
> >stack is full => bang!
>
> You compile with crash_debug=y?
Yes. Mostly to get a xen binary without optimization and with full
debug info, so I can easily lookup stuff using
"objdump -dS xen-syms | less +/<addr>".
> The intention is that do_int3() will execute DEBUGGER_trap_fatal()
> before panic(), so you should enter the gdb stub rather than
> infinitely loop. How is that not occurring?
I don't actually have a debugger attached, so DEBUGGER_trap_fatal
aka __trap_to_cdb() instantly returns.
Gerd
--
#define printk(args...) fprintf(stderr, ## args)
next prev parent reply other threads:[~2005-05-02 15:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-02 14:51 double fault Gerd Knorr
2005-05-02 15:23 ` Keir Fraser
2005-05-02 15:53 ` Gerd Knorr [this message]
2005-05-02 16:02 ` Kip Macy
2005-05-02 16:07 ` Keir Fraser
2005-05-02 16:18 ` Gerd Knorr
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