How to debug deadlock issue?
There are 2 basic ways:
- Automate the running of program under debugger. Using gdb program -ex ‘run ‘ -ex ‘quit’ should run the program under debugger and then quit.
- Attach the debugger after reproducing the deadlock.
How do you analyze a deadlock in Java?
How can we analyze deadlock situation?
- If all threads have only one object then we can use a graph called wait-for-graph.
- If there are multiple objects for a single thread as a cycle then wait-for-graph won’t work then we should go for such a solution like banker’s algorithm in operating system to detect a deadlock.
How do you identify a deadlock in C++?
One method to detect deadlock is to construct a resource requirement graph for shared resources. Suppose system created 2 threads Ta and Tb, both Ta and Tb requires resource Ra and Rb. If Ta has acquired Ra, and is requiring Rb, this can be like a directed graph: Ra->Ta->Rb.
Where does WinDbg install to?
Resolution
- Download Windbg at Download Debugging Tools for Windows – WinDbg – Windows drivers.
- Install windbg to the default location. (
- Launch gflags.exe (Ex: C:\Program Files (x86)\Windows Kits\10\Debuggers\gflags.exe)
- Select the Image File (tab)
- Enter the application name under the Image field (Ex: winword.exe)
How to debug a deadlock in Windows 10?
When a deadlock occurs in user mode, use the following procedure to debug it: Issue the !ntsdexts.locks extension. In user mode, you can just type !locks at the debugger prompt; the ntsdexts prefix is assumed.
Can you use WinDbg for nested lock deadlock?
WinDbg can be used for native C++ programs or for managed .NET programs with the SOS debugging extension. I’ll show you how to use WinDbg to debug the Nested-Lock deadlock from Part 1.
How can I tell if there is a deadlock in a thread?
Use the kb (Display Stack Backtrace) command for each of these threads to determine whether they are waiting on other critical sections. Using the output of these kb commands, you can find the deadlock: two threads that are each waiting on a lock held by the other thread.
What do I need to know about a deadlock driver?
(In kernel mode, you can just type !locks at the debugger prompt; the kdexts prefix is assumed.) The !qlocks extension displays the state of all queued spin locks. The !wdfkd.wdfspinlock extension displays information about a Kernel-Mode Driver Framework (KMDF) spin-lock object.