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POGet object details from clrstack output in windbg
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  1. POGet object details from clrstack output in windbg
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    copied!<p>I have a multi-threaded .NET application that hangs on an OnUserPreferenceChanged event. This is typically caused by a UI control or message loop started on a background thread (see e.g. <a href="http://www.ikriv.com/en/prog/info/dotnet/MysteriousHang.html" rel="nofollow">http://www.ikriv.com/en/prog/info/dotnet/MysteriousHang.html</a>), but as far as I can tell that isn't the case here. I verified this by setting a breakpoint in the WindowsFormsSynchronizationContext (as suggested here <a href="http://www.aaronlerch.com/blog/2008/12/15/debugging-ui/" rel="nofollow">http://www.aaronlerch.com/blog/2008/12/15/debugging-ui/</a>) and it is only constructed once, in the main UI thread.</p> <p>Here's the output from !clrstack in windbg:</p> <blockquote> <p>0013eea8 7c90e514 [HelperMethodFrame_1OBJ: 0013eea8] System.Threading.WaitHandle.WaitOneNative(Microsoft.Win32.SafeHandles.SafeWaitHandle, UInt32, Boolean, Boolean) 0013ef54 792b68af System.Threading.WaitHandle.WaitOne(Int64, Boolean) 0013ef70 792b6865 System.Threading.WaitHandle.WaitOne(Int32, Boolean) 0013ef84 7b6f1a4f System.Windows.Forms.Control.WaitForWaitHandle(System.Threading.WaitHandle) 0013ef98 7ba2d68b System.Windows.Forms.Control.MarshaledInvoke(System.Windows.Forms.Control, System.Delegate, System.Object[], Boolean) 0013f038 7b6f33ac System.Windows.Forms.Control.Invoke(System.Delegate, System.Object[]) 0013f06c 7b920bd7 System.Windows.Forms.WindowsFormsSynchronizationContext.Send(System.Threading.SendOrPostCallback, System.Object) 0013f084 7a92ed62 Microsoft.Win32.SystemEvents+SystemEventInvokeInfo.Invoke(Boolean, System.Object[]) 0013f0b8 7a92dc8f Microsoft.Win32.SystemEvents.RaiseEvent(Boolean, System.Object, System.Object[]) 0013f104 7a92e227 Microsoft.Win32.SystemEvents.OnUserPreferenceChanged(Int32, IntPtr, IntPtr) 0013f124 7aaa06ec Microsoft.Win32.SystemEvents.WindowProc(IntPtr, Int32, IntPtr, IntPtr)</p> </blockquote> <p>The last method I can get param info on is:</p> <blockquote> <p>0013f084 7a92ed62 Microsoft.Win32.SystemEvents+SystemEventInvokeInfo.Invoke(Boolean, System.Object[]) PARAMETERS: this = 0x01404420 checkFinalization = 0x00000001 args = 0x0144a298</p> </blockquote> <p>Here's my question: How can I get more information here? Ultimately, I'd like to know which objects and/or threads this Invoke is for. Something like "!do 0x01404420" or "!do 0x0144a298" but I don't know where to go from there.</p>
 

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