I have a .Net 4.0 WPF application which appears to be hanging sometimes (1-2 times per day). The application is all to do with monitoring users activities and so makes use the a number of native calls (e.g. EnumWindows, GetForegroundWindow, GetLastInputInfo etc). The application also makes use of a SQL Server CE 4.0 database to store some of the information in.
I have managed to get crash dumps from 4-5 of these hangs and they are all looking pretty similar but I am still struggling to get to the cause of the issue.
I have included the results of a DebugDiag analysis of the latest crash dump below. A crash dump taken approx 20sec before this showed exactly the same results. From this it looks like there are 2 threads which are causing others to wait on them.
17 - This thread is inserting some data into the CE database. I cannot see any reason why this thread would be hanging.
22 - I have no idea what this thread is doing from the stacktrace.
The application makes quite heavy use of System.Threading.Tasks in several places to kickoff tasks to process various events and hence there can be quite a lot of threads. From some reading it would look like Thread 22 is a LoaderLock issue but I am using standard windows API calls through DllImport and do not have any custom c++ code (which appears to usually cause this issue).
Any advice or pointers would be appreciated as at the moment I'm a bit stuck!
I can't post the full DebugDiag Results as it's too big but here are the parts which appear to be most important:
**Analysis Summary:**
***Warning***
Detected possible blocking or leaked critical section at ntdll!LdrpLoaderLock owned by thread 22
Impact of this lock
43.59% of threads blocked
(Threads 0 9 17 18 24 25 28 29 30 31 32 33 34 35 36 37 38)
The following functions are trying to enter this critical section
ntdll!LdrGetDllHandleEx+200
ntdll!LdrGetDllHandleByName+38
ntdll!LdrLockLoaderLock+6d
ntdll!LdrGetProcedureAddressEx+42d
ntdll!LdrShutdownThread+72
ntdll!LdrUnloadDll+2b
ntdll!LdrpInitializeThread+8d
The following module(s) are involved with this critical section
C:\Windows\System32\ntdll.dll from Microsoft Corporation
***Warning***
The following threads in are waiting to enter a .NET Lock which thread 17 is currently holding
( 7 8 10 11 13 14 15 16 19 )
23.08% of threads blocked
**Analysis Details:**
***Locked critical section report***
Critical Section ntdll!LdrpLoaderLock
Lock State Locked
Lock Count 17
Recursion Count 1
Entry Count 0
Contention Count 161
Spin Count 0
Owner Thread 22
Owner Thread System ID 14788
***Threads which appear to be causing hangs***
***Thread 22 - System ID 14788***
Entry point ntdll!RtlUserThreadStart+1d
Create time 08/01/2013 12:45:08
Time spent in user mode 0 Days 00:00:00.00
Time spent in kernel mode 0 Days 00:00:00.00
This thread is not fully resolved and may or may not be a problem. Further analysis of these threads may be required.
Function Source
ntdll!NtWaitForSingleObject+a
KERNELBASE!WaitForSingleObjectEx+79
ShellExtension!CoreWaitForThreadEx+106
ShellExtension!_COS_CLIENT_OPERATION_CONTROLLER::COSRemoveAutoResumeTrOps+378
ShellExtension!_COS_CLIENT_OPERATION_CONTROLLER::~_COS_CLIENT_OPERATION_CONTROLLER+45
ShellExtension!DllInstall+11a5e
ShellExtension!DllInstall+69f4
ShellExtension!DllInstall+6b4e
ntdll!LdrpUnloadDll+27d
ntdll!LdrUnloadDll+4a
KERNELBASE!FreeLibrary+1d
ole32!CClassCache::CDllPathEntry::CFinishObject::Finish+28 d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 3394
ole32!CClassCache::CFinishComposite::Finish+46 d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 3504
ole32!CClassCache::FreeUnused+db d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 5430
ole32!CoFreeUnusedLibrariesEx+3b d:\w7rtm\com\ole32\com\objact\dllapi.cxx @ 175
user32!UserCallWinProc+19f
user32!DispatchMessageWorker+143
ole32!CDllHost::STAWorkerLoop+68 d:\w7rtm\com\ole32\com\objact\dllhost.cxx @ 957
ole32!CDllHost::WorkerThread+d7 d:\w7rtm\com\ole32\com\objact\dllhost.cxx @ 834
ole32!CRpcThread::WorkerLoop+1e d:\w7rtm\com\ole32\com\dcomrem\threads.cxx @ 257
ole32!CRpcThreadCache::RpcWorkerThreadEntry+1a d:\w7rtm\com\ole32\com\dcomrem\threads.cxx @ 63
kernel32!BaseThreadInitThunk+d
ntdll!RtlUserThreadStart+1d
***Thread 17 - System ID 14164***
Entry point ntdll!RtlUserThreadStart+1d
Create time 08/01/2013 12:32:00
Time spent in user mode 0 Days 00:00:00.936
Time spent in kernel mode 0 Days 00:00:03.338
This thread is not fully resolved and may or may not be a problem. Further analysis of these threads may be required.
.NET Call Stack
Function
DomainBoundILStubClass.IL_STUB_PInvoke()
System.Data.SqlServerCe.SqlCeConnection..ctor()
System.Data.SqlServerCe.SqlCeProviderFactory.CreateConnection()
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Initialize(System.Data.Linq.Provider.IDataServices, System.Object)
System.Data.Linq.DataContext.Init(System.Object, System.Data.Linq.Mapping.MappingSource)
Company.MyApplication.Application.Bootstrapper+<>c__DisplayClass7.b__5(Microsoft.Practices.Unity.IUnityContainer)
Microsoft.Practices.Unity.InjectionFactory+<>c__DisplayClass2.<.ctor>b__0(Microsoft.Practices.Unity.IUnityContainer, System.Type, System.String)
Microsoft.Practices.ObjectBuilder2.FactoryDelegateBuildPlanPolicy.BuildUp(Microsoft.Practices.ObjectBuilder2.IBuilderContext)
Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(Microsoft.Practices.ObjectBuilder2.IBuilderContext)
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(Microsoft.Practices.ObjectBuilder2.IBuilderContext)
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(System.Type, System.Object, System.String, System.Collections.Generic.IEnumerable`1)
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(System.Type, System.String, System.Collections.Generic.IEnumerable`1)
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(System.Type, System.String)
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[[System.__Canon, mscorlib]]()
Company.MyApplication.Application.Services.Timers.PersistedTimerService.AddIdlePeriod(System.DateTime, System.DateTime)
System.EventHandler`1[[System.__Canon, mscorlib]].Invoke(System.Object, System.__Canon)
Company.MyApplication.Application.IdleDetection.SystemIdleDetector.CheckSystemState(Int32, Boolean, System.DateTime)
Company.MyApplication.Application.IdleDetection.SystemIdleDetector+<>c__DisplayClass3.b__1(System.Object, System.Timers.ElapsedEventArgs)
System.Timers.Timer.MyTimerCallback(System.Object)
System.Threading.ExecutionContext.runTryCode(System.Object)
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
System.Threading._TimerCallback.PerformTimerCallback(System.Object)
Full Call Stack
Function Source
ntdll!NtWaitForSingleObject+a
ntdll!RtlpWaitOnCriticalSection+e8
ntdll!RtlEnterCriticalSection+d1
ntdll!LdrLockLoaderLock+6d
KERNELBASE!GetModuleFileNameW+96
sqlceme40!LoadResourceDll+1d3
sqlceme40!InitResourceDll+2b
sqlceme40!DllAddRef+1f
clr!DoNDirectCall__PatchGetThreadCall+7b
0x000007ff`001e81fa
0x000007ff`001e4b6d
0x000007ff`0048326c
System_Data_Linq_ni+1fca99
System_Data_Linq_ni+1653d1
0x000007ff`00481a08
0x000007ff`001c4a7f
0x000007ff`001c4937
0x000007ff`001b8650
0x000007ff`001b7c31
0x000007ff`001b7428
0x000007ff`001b7244
0x000007ff`001d74e6
0x000007ff`001d745b
0x000007ff`004933d9
0x000007ff`0004bea9
0x000007ff`0048c620
0x000007ff`00493068
System_ni+260561
mscorlib_ni+382f68
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!MethodDesc::CallDescr+2a1
clr!ExecuteCodeWithGuaranteedCleanupHelper+152
clr!ReflectionInvocation::ExecuteCodeWithGuaranteedCleanup+1a5
mscorlib_ni+371651
mscorlib_ni+3ecda7
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!DispatchCallDebuggerWrapper+74
clr!DispatchCallNoEH+7c
clr!AddTimerCallback_Worker+85
clr!VirtualCallStubManager::GenerateResolveCacheElem+aa
clr!FullSegmentIterator+194
clr!DomainFile::Activate+375
clr!COMArrayInfo::GetReference+12b
clr!AddTimerCallbackEx+77
clr!ThreadpoolMgr::AsyncTimerCallbackCompletion+49
clr!UnManagedPerAppDomainTPCount::DispatchWorkItem+181
clr!ThreadpoolMgr::NewWorkerThreadStart+2e5
clr!ThreadpoolMgr::WorkerThreadStart+3b
clr!Thread::intermediateThreadProc+7d
kernel32!BaseThreadInitThunk+d
ntdll!RtlUserThreadStart+1d
***Examples of threads waiting on thread 22***
***Thread 0 - System ID 12068***
Entry point ntdll!RtlUserThreadStart+1d
Create time 08/01/2013 12:30:17
Time spent in user mode 0 Days 00:00:08.190
Time spent in kernel mode 0 Days 00:00:03.026
This thread is not fully resolved and may or may not be a problem. Further analysis of these threads may be required.
.NET Call Stack
Function
System.Windows.Forms.UnsafeNativeMethods.GetModuleHandle(System.String)
DomainBoundILStubClass.IL_STUB_PInvoke(System.String)
System.Windows.Forms.Application.get_ComCtlSupportsVisualStyles()
System.Windows.Forms.ProfessionalColorTable.get_ColorTable()
System.Windows.Forms.ProfessionalColorTable.FromKnownColor(KnownColors)
System.Windows.Forms.ToolStripProfessionalRenderer.RenderToolStripDropDownBackground(System.Windows.Forms.ToolStripRenderEventArgs)
System.Windows.Forms.ToolStripProfessionalRenderer.OnRenderToolStripBackground(System.Windows.Forms.ToolStripRenderEventArgs)
System.Windows.Forms.ToolStrip.OnPaintBackground(System.Windows.Forms.PaintEventArgs)
System.Windows.Forms.ToolStripDropDownMenu.OnPaintBackground(System.Windows.Forms.PaintEventArgs)
System.Windows.Forms.Control.PaintWithErrorHandling(System.Windows.Forms.PaintEventArgs, Int16)
System.Windows.Forms.Control.WmPaint(System.Windows.Forms.Message ByRef)
System.Windows.Forms.Control.WndProc(System.Windows.Forms.Message ByRef)
System.Windows.Forms.ToolStrip.WndProc(System.Windows.Forms.Message ByRef)
System.Windows.Forms.ToolStripDropDown.WndProc(System.Windows.Forms.Message ByRef)
System.Windows.Forms.NativeWindow.Callback(IntPtr, Int32, IntPtr, IntPtr)
DomainBoundILStubClass.IL_STUB_ReversePInvoke(Int64, Int32, Int64, Int64)
MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
DomainBoundILStubClass.IL_STUB_PInvoke(System.Windows.Interop.MSG ByRef)
System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
System.Windows.Application.RunInternal(System.Windows.Window)
Company.MyApplication.Application.Program.Main()
Full Call Stack
Function Source
ntdll!NtWaitForSingleObject+a
ntdll!RtlpWaitOnCriticalSection+e8
ntdll!RtlEnterCriticalSection+d1
ntdll!LdrGetDllHandleEx+200
ntdll!LdrGetDllHandle+1c
KERNELBASE!GetModuleHandleForUnicodeString+26
KERNELBASE!BasepGetModuleHandleExW+d6
KERNELBASE!GetModuleHandleW+1e
clr!DoNDirectCall__PatchGetThreadCall+7b
System_Windows_Forms_ni+35b406
System_Windows_Forms_ni+34d9a6
System_Windows_Forms_ni+3215f9
System_Windows_Forms_ni+321378
System_Windows_Forms_ni+c80860
System_Windows_Forms_ni+ef939b
System_Windows_Forms_ni+31fb6f
System_Windows_Forms_ni+a42080
System_Windows_Forms_ni+347df2
System_Windows_Forms_ni+34c96f
System_Windows_Forms_ni+331339
System_Windows_Forms_ni+31e9dc
System_Windows_Forms_ni+2c9495
System_Windows_Forms_ni+330cfc
System_Windows_Forms_ni+bc1d50
clr!UMThunkStubAMD64+77
user32!UserCallWinProcCheckWow+163
user32!DispatchClientMessage+c3
user32!_fnDWORD+2d
ntdll!KiUserCallbackDispatcherContinue
user32!NtUserDispatchMessage+a
user32!DispatchMessageWorker+55b
clr!DoNDirectCall__PatchGetThreadCall+7b
WindowsBase_ni!?MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen@@20051M1M120N1M08120N <PERF> (WindowsBase_ni+0x1403f0)
WindowsBase_ni!?MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream..ctor@@200301128L80126509+1a
PresentationFramework_ni+3886df
0x000007ff`001b03fa
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!MethodDesc::CallDescr+2a1
clr!ClassLoader::RunMain+228
clr!Assembly::ExecuteMainMethod+ac
clr!SystemDomain::ExecuteMainMethod+452
clr!ExecuteEXE+43
clr!CorExeMainInternal+c4
clr!CorExeMain+15
mscoreei!CorExeMain+41
mscoree!CorExeMain_Exported+57
kernel32!BaseThreadInitThunk+d
ntdll!RtlUserThreadStart+1d
***Thread 38 - System ID 15180***
Entry point ntdll!LdrInitializeThunk+e
Create time 08/01/2013 13:53:47
Time spent in user mode 0 Days 00:00:00.00
Time spent in kernel mode 0 Days 00:00:00.00
This thread is waiting on critical section ntdll!LdrpLoaderLock which is owned by thread 22
Function Source
ntdll!NtWaitForSingleObject+a
ntdll!RtlpWaitOnCriticalSection+e8
ntdll!RtlEnterCriticalSection+d1
ntdll!LdrpInitializeThread+8d
ntdll!LdrpInitialize+9f
ntdll!LdrInitializeThunk+e
***Examples of threads waiting on thread 17***
***Thread 10 - System ID 11748***
Entry point ntdll!RtlUserThreadStart+1d
Create time 08/01/2013 12:30:24
Time spent in user mode 0 Days 00:00:00.951
Time spent in kernel mode 0 Days 00:00:05.818
This thread is waiting to enter a .NET Lock which thread 17 is currently holding
.NET Call Stack
Function
System.Threading.Monitor.Enter(System.Object)
Company.MyApplication.Application.Services.Timers.PersistedTimerService.AddIdlePeriod(System.DateTime, System.DateTime)
System.EventHandler`1[[System.__Canon, mscorlib]].Invoke(System.Object, System.__Canon)
Company.MyApplication.Application.IdleDetection.SystemIdleDetector.CheckSystemState(Int32, Boolean, System.DateTime)
Company.MyApplication.Application.IdleDetection.SystemIdleDetector+<>c__DisplayClass3.b__1(System.Object, System.Timers.ElapsedEventArgs)
System.Timers.Timer.MyTimerCallback(System.Object)
System.Threading.ExecutionContext.runTryCode(System.Object)
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
System.Threading._TimerCallback.PerformTimerCallback(System.Object)
Full Call Stack
Function Source
ntdll!NtWaitForMultipleObjects+a
KERNELBASE!WaitForMultipleObjectsEx+e8
kernel32!WaitForMultipleObjectsExImplementation+b3
clr!WaitForMultipleObjectsEx_SO_TOLERANT+91
clr!Thread::DoAppropriateAptStateWait+56
clr!Thread::DoAppropriateWaitWorker+1b1
clr!Thread::DoAppropriateWait+73
clr!CLREvent::WaitEx+c1
clr!AwareLock::EnterEpilogHelper+ca
clr!AwareLock::EnterEpilog+63
clr!AwareLock::Contention+219
clr!JITutil_MonContention+104
0x000007ff`004932f8
0x000007ff`0004bea9
0x000007ff`0048c620
0x000007ff`00493068
System_ni+260561
mscorlib_ni+382f68
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!MethodDesc::CallDescr+2a1
clr!ExecuteCodeWithGuaranteedCleanupHelper+152
clr!ReflectionInvocation::ExecuteCodeWithGuaranteedCleanup+1a5
mscorlib_ni+371651
mscorlib_ni+3ecda7
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!DispatchCallDebuggerWrapper+74
clr!DispatchCallNoEH+7c
clr!AddTimerCallback_Worker+85
clr!VirtualCallStubManager::GenerateResolveCacheElem+aa
clr!FullSegmentIterator+194
clr!DomainFile::Activate+375
clr!COMArrayInfo::GetReference+12b
clr!AddTimerCallbackEx+77
clr!ThreadpoolMgr::AsyncTimerCallbackCompletion+49
clr!UnManagedPerAppDomainTPCount::DispatchWorkItem+181
clr!ThreadpoolMgr::NewWorkerThreadStart+2e5
clr!ThreadpoolMgr::WorkerThreadStart+3b
clr!Thread::intermediateThreadProc+7d
kernel32!BaseThreadInitThunk+d
ntdll!RtlUserThreadStart+1d
Thread 15 - System ID 8644
Entry point ntdll!RtlUserThreadStart+1d
Create time 08/01/2013 12:31:54
Time spent in user mode 0 Days 00:00:00.686
Time spent in kernel mode 0 Days 00:00:03.338
This thread is waiting to enter a .NET Lock which thread 17 is currently holding
.NET Call Stack
Function
System.Threading.Monitor.Enter(System.Object)
Company.MyApplication.Application.Services.Timers.PersistedTimerService.PauseTimer(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone)
Company.MyApplication.Application.Services.Timing.TimerActivityMonitor.CallEndActionIfNoFurtherActivity(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone, System.Action`1, Company.MyApplication.Services.DataContracts.TimeEntrySubmissions.ITimeEntrySubmission)
Company.MyApplication.Application.Services.Timing.TimerActivityMonitor.RunEndAction(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone, System.Action`1, System.Timers.Timer, Company.MyApplication.Services.DataContracts.TimeEntrySubmissions.ITimeEntrySubmission)
Company.MyApplication.Application.Services.Timing.TimerActivityMonitor.RegisterTimerEndAction(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone, System.Action`1, System.TimeSpan, Company.MyApplication.Services.DataContracts.TimeEntrySubmissions.ITimeEntrySubmission)
Company.MyApplication.Application.Services.Timing.EventDrivenTimingService`1[[Company.MyApplication.Services.EventTypes.ApplicationEventType, Company.MyApplication.Services]].PauseTiming(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone, System.TimeSpan, Company.MyApplication.Services.DataContracts.TimeEntrySubmissions.ITimeEntrySubmission)
Company.MyApplication.Application.Services.Timing.EventDrivenTimingService`1[[Company.MyApplication.Services.EventTypes.ApplicationEventType, Company.MyApplication.Services]].PerformItemAction(Company.MyApplication.Services.DataContracts.Timing.ITimerIdentifier, Company.MyApplication.Services.DateTimeWithZone, Company.MyApplication.Application.Services.Timing.TimerAction, System.TimeSpan, Company.MyApplication.Services.DataContracts.TimeEntrySubmissions.ITimeEntrySubmission)
Company.MyApplication.Application.Services.Timing.EventDrivenTimingService`1+<>c__DisplayClass3[[Company.MyApplication.Services.EventTypes.ApplicationEventType, Company.MyApplication.Services]].b__0()
System.Threading.Tasks.Task.Execute()
System.Threading.ExecutionContext.runTryCode(System.Object)
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
System.Threading.Tasks.Task.ExecuteEntry(Boolean)
Company.MyApplication.Tools.Tasks.LimitedConcurrencyLevelTaskScheduler.b__3(System.Object)
System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue.Dispatch()
System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
Full Call Stack
Function Source
ntdll!NtWaitForMultipleObjects+a
KERNELBASE!WaitForMultipleObjectsEx+e8
kernel32!WaitForMultipleObjectsExImplementation+b3
clr!WaitForMultipleObjectsEx_SO_TOLERANT+91
clr!Thread::DoAppropriateAptStateWait+56
clr!Thread::DoAppropriateWaitWorker+1b1
clr!Thread::DoAppropriateWait+73
clr!CLREvent::WaitEx+c1
clr!AwareLock::EnterEpilogHelper+ca
clr!AwareLock::EnterEpilog+63
clr!AwareLock::Contention+219
clr!JITutil_MonContention+104
0x000007ff`0049414b
0x000007ff`0049401d
0x000007ff`00493e13
0x000007ff`00493c99
0x000007ff`00493b87
0x000007ff`004905f9
0x000007ff`0049046d
mscorlib_ni+abde22
mscorlib_ni+382f68
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!MethodDesc::CallDescr+2a1
clr!ExecuteCodeWithGuaranteedCleanupHelper+152
clr!ReflectionInvocation::ExecuteCodeWithGuaranteedCleanup+1a5
mscorlib_ni+371651
mscorlib_ni+ab8685
mscorlib_ni+ab8480
0x000007ff`004902e1
mscorlib_ni+3bc183
mscorlib_ni+3bb813
mscorlib_ni+3bb665
clr!CallDescrWorker+84
clr!CallDescrWorkerWithHandler+a9
clr!MethodDesc::CallDescr+2a1
clr!MethodDescCallSite::Call+35
clr!QueueUserWorkItemManagedCallback+44
clr!VirtualCallStubManager::GenerateResolveCacheElem+aa
clr!FullSegmentIterator+194
clr!DomainFile::Activate+375
clr!ManagedPerAppDomainTPCount::DispatchWorkItem+e6
clr!ThreadpoolMgr::NewWorkerThreadStart+2e5
clr!ThreadpoolMgr::WorkerThreadStart+3b
clr!Thread::intermediateThreadProc+7d
kernel32!BaseThreadInitThunk+d
ntdll!RtlUserThreadStart+1d
