Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Date: Wed, 18 Feb 2004 09:39:50 -0500
From: Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: ftp bug report
Message-ID: <20040218143950.GB1240@redhat.com>
Mail-Followup-To: cygwin AT cygwin DOT com
References: <20040218102114 DOT 66049 DOT qmail AT web14306 DOT mail DOT yahoo DOT com> <Pine DOT GSO DOT 4 DOT 56 DOT 0402180933330 DOT 5630 AT slinky DOT cs DOT nyu DOT edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Pine.GSO.4.56.0402180933330.5630@slinky.cs.nyu.edu>
User-Agent: Mutt/1.4.1i
X-IsSubscribed: yes
Reply-To: cygwin AT cygwin DOT com

On Wed, Feb 18, 2004 at 09:36:58AM -0500, Igor Pechtchanski wrote:
>On Wed, 18 Feb 2004, Thomas Mellman wrote:
>
>> Re: ftp crash
>>   I tried to debug it with gdb but for some reason that I don't
>>   understand, it hangs when run.
>>
>>   Nevertheless, using gdb to get the symbols (which appear to
>>   be correct) and the ftp.exe.stackdump, I believe that I have
>>   localized the problem to the call to dataconn() in recvrequest().
>> [snip]
>>   The funny thing is that the datacon() routine is in ftp.c, at
>>
>>   Local exec file:
>>         `/opt/pub/inetutils-1.3.2-25/ftp/ftp.exe', file type pei-i386.
>>         Entry point: 0x401000
>>         0x00401000 - 0x0040cb04 is .text
>>         0x0040d000 - 0x0040e280 is .data
>>         0x0040f000 - 0x00411310 is .bss
>>         0x00412000 - 0x00412ba4 is .idata
>>
>>   But the "entry point" for dataconn is somewhere completely different:
>>
>>     Exception: STATUS_ACCESS_VIOLATION at eip=610AB030
>>     eax=611489F4 ebx=00000038 ecx=7070736D edx=611489F4 esi=0A045018 edi=000001B0
>>     ebp=0022E9E8 esp=0022E9C8 program=D:\Programme\pub\inetutils-1.3.2-25\ftp\ftp.exe
>>     cs=001B ds=0023 es=0023 fs=0038 gs=0000 ss=0023
>>     Stack trace:
>>     Frame     Function  Args
>> [snip]
>>     0022EDB8  61086211  (00401083, 00405EDB, 0A044B70, 00000001)
>>
>>                   ^ - dataconn?
>>   recvrequest - v
>>
>>     0022EE88  00402E15  (00405EDB, 0A045258, 0A044B70, 00405E3C)
>> [snip]
>>     End of stack trace (more stack frames may be present)
>>
>>   Or is these frames starting at 0x22edb8 (0x61086211) some kind
>>   of an interrupt?
>>
>>   Oh, perhaps the dataconn stack frame got lost somehow.  Anyway,
>> [strace output snipped]
>
>0x61000000 is the base address for cygwin1.dll, IIRC.

True, but that address is in the middle of malloc, which usually means
malloc pool corruption.  That means it's not a cygwin DLL problem per
se.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/