Debugger apparatus and method having an event history recording

Details Debugger apparatus and method having an event history recording Debugger apparatus and method having an event history recording

1994-01-27

1995-06-27

Harrell, Robert B.

Excavating

395575, 364DIG1, 364DIG2, 364267, 3642671, 3642672, 3642673, 3642674, 3642675, 3642676, 3642677, 36426791, G01F 1134

Patent

active

054286182

ABSTRACT:
According to this invention, a debugger for supporting a debug operation for a program used in a computer having a memory and a register includes a user interface section for inputting a command from a user, an event history recording section for recording an event history of events occurring when the program undergoing debug is executed, a program behavior reproducing section for controlling the program in accordance with the event history to reexecute a portion of the program, an instruction execution history recording section for recording an instruction execution history including all instructions which are executed when the execution corresponding to the program are reproduced by the program behavior reproducing section, contents of the memory and register before the instructions are executed, and an instruction execution history reproducing section for selectively performing a back track for recovering an internal state of the computer to a state, obtained prior to execution of at least one instruction of the program, in accordance with the instruction execution history, and a reexecution, performed after the reverse execution is performed, on the basis of a command from the user interface section.

REFERENCES:
patent: 5333302 (1994-07-01), Hensley et al.
Tsai et al., "A Noninterference Monitoring and Replay Mechanism for Real-Time Software Testing and Debugging", IEEE Transactions on Software Engineering, Aug. 1990.

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