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Date: Sat, 13 Oct 2012 18:10:23 +0200
From: marco atzeri <marco DOT atzeri AT gmail DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: sshd fork failure
References: <503F9877 DOT 5070406 AT gmail DOT com> <20121013153936 DOT GB839 AT ednor DOT casa DOT cgf DOT cx>
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On 10/13/2012 5:39 PM, Christopher Faylor wrote:
> On Thu, Aug 30, 2012 at 06:44:39PM +0200, marco atzeri wrote:
>> Hi,
>> tracing the sshd process on latest cygwin shapshot ,
>> I see that the fork is failing due to exception C0000005
>>
>>      1       1 [main] sshd (4644)
>> **********************************************
>>   5921    5922 [main] sshd (4644) Program name:
>> E:\cygwin\usr\sbin\sshd.exe (windows pid 4644)
>>     30    5952 [main] sshd (4644) OS version:   Windows NT-6.1
>>     25    5977 [main] sshd (4644)
>> **********************************************
>>    636    6613 [main] sshd (4644) sigprocmask: 0 = sigprocmask (0,
>> 0x6123D428, 0x610FBB30)
>>    122    6735 [main] sshd 4644 child_copy: cygheap - hp 0x20C low
>> 0x612708D0, high 0x61277640, res 1
>>   1368    8103 [main] sshd 4644 child_copy: done
>> --- Process 4644, exception C0000005 at 61137277
>>
>>
>>
>> $ addr2line.exe 61137277 -e /usr/bin/cygwin1.dll
>> /netrel/src/cygwin-snapshot-20120827-1/newlib/libc/stdlib/mbtowc_r.c:323
>>
>> that should be:
>>
>>   ch = (state->__count == 1) ? t[i++] : state->__value.__wchb[1];
>>
>> inside __utf8_mbtowc .
>> It looks a strange place for a fork failure, but it is used in
>> winsup/cygwin/cygheap.cc so it could make sense.
>>
>> Any suggestion how to follow/debug the child portion of fork ?
>
> Is this still failing?  We're looking to release 1.7.17 soon.
>
> cgf
>

on  20121012 similar but in another location.

--- Process 6280, exception C0000005 at 61137DC8
   427  147466 [main] sshd 6280 exception::handle: In 
cygwin_except_handler exception 0xC0000005 at 0x61137DC8 sp 0x289270
    67  147533 [main] sshd 6280 exception::handle: In 
cygwin_except_handler signal 11 at 0x61137DC8
    38  147571 [main] sshd 6280 exception::handle: In 
cygwin_except_handler calling 0x0
    37  147608 [main] sshd 6280 exception::handle: Exception: 
STATUS_ACCESS_VIOLATION

  addr2line.exe 61137DC8 -e /usr/bin/cygwin1.dll
/netrel/src/cygwin-snapshot-20121012-1/newlib/libc/stdio/findfp.c:296


Marco


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