I'm experiencing an exception in the first run of any SOS extension commands when the load by command is use to load the extension. However if I use the load command the exception is not presented. Below is a step through the process I use. can someone explain why this happens and a possible resolution.
0:007> .chain
Extension DLL search Path:
C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\arcade;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\pri;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\arcade;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;c:\Internal_Tools;C:\Windows\System32\inetsrv;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;c:\scripts;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Notepad++;C:\Program Files\Microsoft SDKs\Windows\v7.0A\Bin;c:\scripts;C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE;C:\Windows\Microsoft.NET\Framework\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin;C:\WinDDK\7600.16385.1\tools\Other\amd64;C:\Program Files (x86)\Fiddler2;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64;C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Binn;C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\Tools;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86;C:\Windows\System32;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\HxD;C:\Program Files\Microsoft Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft Fxcop 10.0;C:\Internal_Tools\PerfView
Extension DLL chain:
pde.dll: image 9, 5, 0, 0, API 9.5.0, built Wed Jun 11 16:29:51 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\pde.dll]
dbghelp: image 6.3.9600.17029, API 6.3.6, built Thu Feb 20 03:04:49 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\dbghelp.dll]
ext: image 6.3.9600.17029, API 1.0.0, built Thu Feb 20 03:23:22 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\ext.dll]
wow64exts: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:03:41 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\wow64exts.dll]
exts: image 6.3.9600.17029, API 1.0.0, built Thu Feb 20 03:12:50 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\exts.dll]
uext: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:04:09 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\uext.dll]
ntsdexts: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:04:34 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\ntsdexts.dll]
0:007> !bigline
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
0:007> .loadby sos clr
0:007> .chain
Extension DLL search Path:
C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\arcade;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\pri;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\arcade;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;c:\Internal_Tools;C:\Windows\System32\inetsrv;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;c:\scripts;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\110\DTS\Binn\;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Notepad++;C:\Program Files\Microsoft SDKs\Windows\v7.0A\Bin;c:\scripts;C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE;C:\Windows\Microsoft.NET\Framework\v4.0.30319;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin;C:\WinDDK\7600.16385.1\tools\Other\amd64;C:\Program Files (x86)\Fiddler2;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64;C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Binn;C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\Tools;C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86;C:\Windows\System32;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\HxD;C:\Program Files\Microsoft Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft Fxcop 10.0;C:\Internal_Tools\PerfView
Extension DLL chain:
C:\Windows\Microsoft.NET\Framework\v4.0.30319\sos: image 4.0.30319.34209, API 1.0.0, built Fri Apr 11 21:17:38 2014
[path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\sos.dll]
pde.dll: image 9, 5, 0, 0, API 9.5.0, built Wed Jun 11 16:29:51 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\pde.dll]
dbghelp: image 6.3.9600.17029, API 6.3.6, built Thu Feb 20 03:04:49 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\dbghelp.dll]
ext: image 6.3.9600.17029, API 1.0.0, built Thu Feb 20 03:23:22 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\ext.dll]
wow64exts: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:03:41 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\wow64exts.dll]
exts: image 6.3.9600.17029, API 1.0.0, built Thu Feb 20 03:12:50 2014
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\exts.dll]
uext: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:04:09 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\winext\uext.dll]
ntsdexts: image 6.3.9600.16384, API 1.0.0, built Thu Aug 22 00:04:34 2013
[path: C:\Program Files (x86)\Windows Kits\8.1\Debuggers\x86\WINXP\ntsdexts.dll]
0:007> !line
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
0:007> !threads
c0000005 Exception in C:\Windows\Microsoft.NET\Framework\v4.0.30319\sos.threads debugger extension.
PC: 728b7713 VA: 00000000 R/W: 0 Parameter: 00000000
0:007> !line
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
0:007> !threads
ThreadCount: 5
UnstartedThread: 0
BackgroundThread: 2
PendingThread: 0
DeadThread: 2
Hosted Runtime: no
Lock
ID OSID ThreadOBJ State GC Mode GC Alloc Context Domain Count Apt Exception
0 1 ed0 00819228 2a020 Preemptive 00D22AB4:00000000 007e1498 0 MTA
2 2 f24 007ea7e8 2b220 Preemptive 00000000:00000000 007e1498 0 MTA (Finalizer)
XXXX 3 0 0085d748 30820 Preemptive 00000000:00000000 007e1498 0 Ukn
XXXX 4 0 0085f558 1039820 Preemptive 00000000:00000000 007e1498 0 Ukn (Threadpool Worker)
5 6 c84 00861730 8029220 Preemptive 00E6C270:00000000 007e1498 0 MTA (Threadpool Completion Port)
0:007> lm v m clr
Browse full module list
start end module name
71aa0000 7213d000 clr (deferred)
Image path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Image name: clr.dll
Browse all global symbols functions data
Timestamp: Fri Apr 11 21:25:50 2014 (5348961E)
CheckSum: 0069CE03
ImageSize: 0069D000
File version: 4.0.30319.34209
Product version: 4.0.30319.34209
File flags: 8 (Mask 3F) Private
File OS: 4 Unknown Win32
File type: 2.0 Dll
File date: 00000000.00000000
Translations: 0409.04b0
CompanyName: Microsoft Corporation
ProductName: Microsoft® .NET Framework
InternalName: clr.dll
OriginalFilename: clr.dll
ProductVersion: 4.0.30319.34209
FileVersion: 4.0.30319.34209 built by: FX452RTMGDR
PrivateBuild: DDBLD354
FileDescription: Microsoft .NET Runtime Common Language Runtime - WorkStation
LegalCopyright: © Microsoft Corporation. All rights reserved.
Comments: Flavor=Retail
It is a bug in DbgEng.dll. A workaround was added for CoreClr. Not sure if it ever made its way to the full Framework. You can work around the issue by adding the extension to sos: hence .loadby sos.dll clr rather than .loadby sos clr.
See here for full details on the bug.
来源：https://stackoverflow.com/questions/25183295/c0000005-exception-in-c-windows-microsoft-net-framework-v4-0-30319-sos-threads