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Is it possible that a program which does not kill its threads properly before exiting still be running some piece of code somewhere even though it has been killed in system monitor? I am running ubuntu in a non virtual environment. My application is made with QT, it contains QThreads, a main thread and concurent functions.
If you kill the process then you kill all its threads. The only cause for concern would be if your application had spawned multiple processes – if that is the case then you may still have code executing on the machine.
This is all very speculative though as I don’t know what operating system you code is running on, whether or not your application runs in a virtual environment, etc. Environment-specific factors are very relevant to the discussion, can you share a bit more about your application?