Integrated debugger simulator

A computer-readable medium, the computer-readable medium not consisting of a propagating signal, the computer-readable medium having computer-executable instructions for causing a computer to perform steps comprising:

• debugging an application using a live debugger to debug an application in a live mode;
• simultaneously simulating the application using a simulator that reads multiple streams of recorded data from earlier points in time in execution of the application;
• and
• integrating the live debugger and the simulator together to provide a simulation mode that allows the user to concurrently interact with the recorded data of the multiple streams of recorded data and the live mode using standard commands and standard data views available in the live debugger.

A method for integrating simulation and live debugging of an application in a single debugger comprising the steps of:

• using a computing device, debugging an application in a live mode of operation based upon a request from a user to debug the application with a debugger by executing the application at a present moment;
• simulating the application in a simulation mode of operation based upon user interaction with recorded data of multiple streams of recorded data from an earlier in time in execution of the application using the debugger;
• and
• concurrently displaying live debugger state associated with the live mode, and, simulated application state associated with the simulation mode of the multiple streams of recorded data, the live debugger state and the simulated application state displayed at a same time.