From: Cristian Zamfir <cristian.zamfir@epfl.ch>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: <gdb@sourceware.org>
Subject: Re: backtrace when corrupt stack
Date: Fri, 05 Feb 2010 19:58:00 -0000 [thread overview]
Message-ID: <251102A0-163B-4484-AEFF-D13133F6F1D8@epfl.ch> (raw)
In-Reply-To: <m2hbpvec59.fsf@igel.home>
On Feb 5, 2010, at 8:05 PM, Andreas Schwab wrote:
>> I would like to get the function name and the arguments from frame 5 (see output below) --- the one called from the function Log()). The backtrace suggests this is __stack_chk_fail () from libc but that is not correct.
>
> Why do you think so? That frame looks pretty reasonable.
>
> Andreas.
I am pretty sure that the function in frame #5 should be vsprintf() which is passed a buffer with insufficiently allocated space. But on the stack I see __stack_chk_fail () instead of vsprintf ().
My guess is that glibc detects a stack smashing and in the backtrace I see the abort handler instead of the call to vsprintf. Both vsprintf and Log have variable length arguments, but I am not sure that explains anything.
Thanks,
Cristi
next prev parent reply other threads:[~2010-02-05 19:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-05 15:24 Cristian Zamfir
2010-02-05 17:16 ` Robert Dewar
2010-02-05 17:36 ` Tom Tromey
2010-02-05 19:05 ` Andreas Schwab
2010-02-05 19:58 ` Cristian Zamfir [this message]
2010-02-05 20:27 ` Andreas Schwab
2010-02-05 19:56 ` Dave Korn
2010-02-05 20:05 ` Cristian Zamfir
2010-02-05 20:39 ` Dave Korn
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