How do I debug my program when it hangs?

Question

I have an application which takes measurements every second (I am running it in demo mode & generating random data, so the problem is not to do with reading from devices

Answer 1

If you want help with this sort of thing in an app that you cannot use the IDE for, then something like madExcept can help a lot. It has an automatic freeze checker for the main thread, and you can have it give you a stack dump to show what it was doing when it was frozen. The user can choose to kill or continue, and the app can tell madExcept it is busy and not to alert if appropriate (for doing long analysis or printing or something).