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Message-ID: <4C9BE120.1080701@budcat.com>
Date: Thu, 23 Sep 2010 18:22:08 -0500
From: Heath Kehoe <hkehoe AT budcat DOT com>
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To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: Re: strange crashes on invocation
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On 9/23/2010 3:07 PM, Heath Kehoe wrote:
> On 9/23/2010 12:13 PM, Heath Kehoe wrote:
>>     I have a build system that uses rake under cygwin, and every so often
>> a build tool will crash on invocation:
>>
>>          1 [main] bclanc 1576! C:\budcat\tools\bin\bclanc.exe: *** fatal
>> error - could not load w, Win32 error 998
>> Stack trace:
>> Frame     Function  Args
>> 00289F44  6102740B  (00289F44, 00000000, 00000000, 00000000)
>> 0028A234  6102740B  (61179C20, 00008000, 00000000, 6117B997)
>> 0028B264  61004B2B  (6117B084, 61163DD0, 00000000, 00000000)
>> 0028B4C4  6100137A  (61053A9A, 00000168, 00000002, 00000002)
> [snip]
>> My OS is Win7 x64. Cygwin is built from CVS as of 2010-09-21 12:11
>> (though I'm pretty sure I've seen this on 1.7.7 as well)
> I've confirmed that this crash is happening on 1.7.7; it does not appear
> to happen on 1.7.6.
>
> Could it be related to the DLL loading change relating to the security
> advisory? I'll probably try to revert the revision 1.171 changes to
> autoload.cc to see if that makes any difference.

I'm currently testing the latest CVS, but with these changes rolled back:
http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/cygwin/autoload.cc.diff?r1=1.170&r2=1.171&cvsroot=src&f=h

Thus far, I have not yet seen the crash. I'll hammer on it more to make 
sure.

BTW, that stack trace's addresses correspond to:
     cygwin_stackdump
     cygwin_stackdump
     __api_fatal
     std_dll_init

Which is unsurprising and also not very informative (I'd already found 
where the fatal error was coming from by searching for "could not load" 
in the sources).

When looking at the autoload.cc code, I noticed the api_fatal call is 
still using dll->name as an ascii string when revision 1.171 changed 
dll->name to a wide string. That's why the error message only prints the 
first character of the dll name.

-h

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