Debugging systems

A method for debugging a computer program comprising computer readable program code, the method comprising:

• displaying on first and second user devices respective first and second graphical user interfaces displaying data indicative of an execution of a debugger processing debugging data, the debugging data comprising replay debugging data for replaying an execution of the computer program, and where said execution of the debugger comprises replaying the execution of the computer program using the debugging data, wherein the displaying comprises, at the first and second graphical user interfaces:
• simultaneously displaying data indicative of a temporal position within the replay of the execution of the computer program associated with the first graphical user interface and data indicative of a temporal position within the replay of the execution of the computer program associated with the second graphical user interface;
• and
• displaying data indicative of a position within the computer readable program code associated with the other one of said graphical user interface.

A user device for use in debugging a computer program comprising computer readable program code, the user device comprising:

• a transceiver, the transceiver configured to receive:
• data indicative of a temporal position within a replay of the execution of the computer program associated with a second user device and data indicative of a position within the computer readable program code associated with a second user device;
• a display comprising a graphical user interface configured to display data indicative of an execution of a debugger processing debugging data, the debugging data comprising replay debugging data for replaying an execution of the computer program, and where said execution of the debugger comprises replaying the execution of the computer program using the debugging data, wherein the graphical user interface is configured to:
• simultaneously display the data indicative of the temporal position within the replay of the execution of the computer program associated with the second user device and the data indicative of the temporal position within the replay of the execution of the computer program associated with the user device;
• and
• display the data indicative of the position within the computer readable program code associated with the second user device.

A server for use in debugging a computer program comprising computer readable program code, the server comprising:

• a memory comprising debugging data comprising replay debugging data for replaying an execution of the computer program;
• a processor configured to execute a debugger using the debugging data, said execution of the debugger comprising replaying the execution of the computer program using the debugging data;
• and
• a transceiver configured to:
• simultaneously send to a first user device data indicative of a temporal position within the replay of the execution of the computer program associated with a second user device, and send to the second user device data indicative of a temporal position within the replay of the execution of the computer program associated with the first user device;
• the transceiver further configured to send data indicative of a position within the computer readable program code associated with the second user device.