A system and method are disclosed for testing a device driver on a data processing system. An operating system allocates a memory address range for executing a device driver. The device driver is executed as an application on top of the operating system to test the device driver. The system and method monitor to detect whether a target address for a request made by the device driver is within the memory address range. In response to detecting the target address for the request being made outside...

Methods, systems and articles of manufacture for software implemented timers configured to account for purposeful or desired program stoppage. Such program stoppage is a common occurrence in debugging environments. Because such program stoppage is not indicative of an error condition, it is undesirable to include the stoppage time with the elapsed timer value. Accordingly, a process counter is implemented which is incremented only while a process of the application being debugged is executing.