Message-Id: <1275486371.5031.1378094543@webmail.messagingengine.com>
From: cw AT tocaido DOT net
To: cygwin AT cygwin DOT com
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Subject: STATUS_ACCESS_VIOLATION in strlen running a vanilla uw-imapd
Date: Wed, 02 Jun 2010 15:46:11 +0200
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Hello,

I am trying to compile the latest release of uw-imapd under Cygwin and
Windows XP but the program crash after the first command.

This is with the vanilla source from upstream. I know that it is not
supposed to work very well but yesterday I did the same thing on a
Windows Seven box and I did not have any problem.

This is the output from ldd:

[15:06][/tmp/imap-2007e/imapd] > ldd ./imapd.exe
        ntdll.dll => /cygdrive/c/WINDOWS/system32/ntdll.dll (0x7c900000)
        kernel32.dll => /cygdrive/c/WINDOWS/system32/kernel32.dll
        (0x7c800000)
        cygwin1.dll => /usr/bin/cygwin1.dll (0x61000000)
        ADVAPI32.DLL => /cygdrive/c/WINDOWS/system32/ADVAPI32.DLL
        (0x77dd0000)
        RPCRT4.dll => /cygdrive/c/WINDOWS/system32/RPCRT4.dll
        (0x77e70000)
        Secur32.dll => /cygdrive/c/WINDOWS/system32/Secur32.dll
        (0x77fe0000)

(I am not using the SSL option)

Here is the stackdump:

Exception: STATUS_ACCESS_VIOLATION at eip=611097F3
eax=4D61696C ebx=00000000 ecx=FFFFFFFF edx=4D61696C esi=00000001
edi=4D61696C
ebp=0022B778 esp=0022B774
program=C:\cygwin\tmp\imap-2007e\imapd\imapd.exe, pid 1560, thread main
cs=001B ds=0023 es=0023 fs=003B gs=0000 ss=0023
Stack trace:
Frame     Function  Args
0022B778  611097F3  (4D61696C, 0022BA3A, 00470CC9, 00000001)
0022BA58  6113E916  (0022D000, 0022BA78, 00470CC6, 0022BB00)
0022BAE8  61114064  (0022BB00, 00470CC6, 008599A0, 4D61696C)
0022BF08  610BC826  (00469DC0, 00000000, 00000000, 00000000)
0022BF38  00441A76  (0022BFC0, 00469DC0, 00000000, 00000000)
0022C3C8  0040548A  (00000000, 00469546, 00000708, 00869B90)
0022CD28  00407952  (00000001, 008598C0, 008480E0, 00008000)
0022CD98  61006E73  (00000000, 0022CDD4, 61006720, 7FFDC000)
End of stack trace

Using GDB on a running program:

[15:33][/tmp/imap-2007e/imapd] > gdb ./imapd.exe
GNU gdb 6.8.0.20080328-cvs (cygwin-special)
[...]
This GDB was configured as "i686-pc-cygwin"...
(gdb) run
Starting program: /tmp/imap-2007e/imapd/imapd.exe
[New thread 2592.0x5cc]
[New thread 2592.0x7c0]
* PREAUTH [CAPABILITY IMAP4REV1 I18NLEVEL=1 LITERAL+ IDLE UIDPLUS
NAMESPACE CHILDREN MAILBOX-REFERRALS BINARY UNSELECT ESEARCH WITHIN SCAN
SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND]
Pre-authenticated user dente bfmi246pc IMAP4rev1 2007e.404 at Wed, 2 Jun
2010 15:33:48 +0200
[New thread 2592.0x84c]
aaa hhh

Program received signal SIGSEGV, Segmentation fault.
0x611097f3 in strlen () from /usr/bin/cygwin1.dll
(gdb) bt
#0  0x611097f3 in strlen () from /usr/bin/cygwin1.dll
#1  0x7c85ada0 in OutputDebugStringA () from
/cygdrive/c/WINDOWS/system32/kernel32.dll
#2  0x40010006 in ?? ()
#3  0x00000000 in ?? ()

(I have used "aaa hhh" as an example nonsensical comman, but I get the
crash whatever I use as an input)


Using GDB on a coredump ends with:

#0  0x611097f3 in strlen () from C:\cygwin\bin\cygwin1.dll


Now I am stuck ... Seeing that it is not a program guaranteed to work
under cygwin I would not have asked on the mailing list, but for the
fact that a) it is working under Win7 but not under WinXP and b) GDB
seems to say that the problem is in the cygwin1.dll.

Well, b) could just be me not being able to use GDB .... 

One more thing, I have made a search and I am pretty sure that there is
only one cygwin1.dll on my system.


Any pointer would be very much appreciated.

Thanks,
Davide D.


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