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Fetching callstacks for all threads

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Fetching callstacks for all threads


Using the Deadlocked Thread PostMortem dialog below, you can retrieve all thread callstacks in your application.


This may be useful in many ways, but in particular, if you know a deadlock has occurred in your program, then examining the callstacks of each thread will help determine where the deadlock occurred.



The Deadlocked Thread PostMortem dialog


To show this dialog, choose the menu option below:


menu Query menu instructionStep choose Display stack traces for all threads... instructionStep displays the dialog below


Or use the following icon on the Query Toolbar.







The dialog appears already populated with the callstack information


Clear instructionStep remove any existing results


Refresh instructionStep update the list of callstacks shown in the display



Viewing the callstacks


The image below shows the results of a search that has been expanded to show a callstack.


Note that above each callstack, the thread id (and name if the thread is named) is displayed followed by a list of critical sections which this thread has locked or is waiting upon.


For example:




If the thread is not waiting upon any critical sections and is not involved in a wait, a message No critical sections or waits for this thread is displayed.





'Unable to get locks list' warning


If Thread Validator fails to find the process locks list it will provide a warning and information for what to do to enable the list to be found.


In this example, the suggestion is to enable a Microsoft Symbol Server.