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My outlook addin application is hung and windbg hang dump analysis shows all threads are in suspended/unfrozen state. The errors in the event viewer and process monitor shows hundreds of registry lookup failures and disk access failures. What does the threads' suspended/unfrozen state mean?

Raja
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1 Answers1

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The F1 help from WinDBG explains the following in greater detail if you look for 'Controlling Processes and Threads' link from '~ (Thread Status) command' under Index tab. Also there is a MSDN link.

So firstly freezing has no meaning unless you have a debugger attached so only a debugger can freeze or unfreeze a thread.

Suspended threads have a suspend count such that when the count goes to 0 resumes execution for that thread if appropriate, higher than 0 will suspend the thread.

Typically when you attach the debugger then it will increase the suspend count for each thread by 1 as you are invasively debugging the application or you have hit a breakpoint.

So frozen/unfrozen state only has meaning when you have the debugger attached and have hit a breakpoint, suspended/unsuspended is the suspend count for each thread when your application is running.

Hope this helps.

EdChum
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  • just wanted to share this link, as this answer and the link together helped me: http://msdn.microsoft.com/en-us/library/windows/hardware/ff539289(v=vs.85).aspx – x29a Mar 17 '14 at 14:39