7 Debugger

The Debugger in the Mjolner System is called Valhalla.
The user interface of Valhalla consists of a main window containing a menu and a number of different windows (views) displaying different aspects of the debugged program (called the Valhalla Universe). The Valhalla Universe is a top-level window, containing different internal windows for displaying different aspects of the execution state of the debugged process. Below a very short description of the different window types in the Valhalla Universe is given before we go on to describe how to get started using Valhalla.

• The object views display the state of BETA objects and components ^[3].
• The stack views display the runtime stack of the debugged process.
• The stackbrowser view, which is a combined code, stack and object view.

Details on the functionality of the window types follows in the tutorial and in the reference manual following the tutorial.