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From:	"Schmidt, Oliver" <oliv DOT schmidt AT sap DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date:	Fri, 12 Mar 2010 16:48:14 +0100
Subject:	Re: Cygwin 1.7: Concurrency Issue with Shared State Initialization
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Hi,

> Does the patch help?

As the issue is sporadic it's not that easy to come up with a conclusive
answer...

I downloaded http://cygwin.com/snapshots/cygwin1-20100309.dll.bz2,=20
unpacked and renamed the DLL and used it as drop-in replacement to the
1.7.1 DLL.

I experienced three times by now the effect that echo.exe "hangs" without
using significant CPU time. Attaching a MSVC debugger I could only find
out that in all three cases the executable stays in this endless loop:

7D6373D2  cmp         dword ptr ds:[7D6A0220h],edi=20
7D6373D8  jne         7D628061=20
7D6373DE  lea         eax,[ebp-28h]=20
7D6373E1  push        eax=20=20
7D6373E2  push        ebx=20=20
7D6373E3  call        7D61CCB1=20
7D6373E8  cmp         eax,ebx=20
7D6373EA  jge         7D6373D2=20

I'm sort of reluctant to present this information this way as I'm afraid
I'm to give someone a bum steer. However I haven't had this effect so far
with with the 1.7.1 DLL so it would be at least one possible explanation
that the patch has a bug showing up in the very sporadic case it is
supposed to fix.

Regards, Oliver

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