A method for realizing forward and reverse bidirectional execution of an instruction set simulator

Abstract

The invention discloses a method for realizing positive and reverse execution of instruction set simulator. The method comprises the steps of firstly executing software by using the instruction set simulator to obtain processor running states, register states, memory states and peripheral states of the instruction set simulator corresponding to multiple key recording time points; then obtaining an external execution instruction; obtaining a starting time point of needed reverse execution if the reverse execution is needed in a positive execution process; and finally calculating a key recording time point by using time granularity or an ending time point of the needed reverse execution, and recovering the processor running state, the resister state, the memory state and the peripheral state of the instruction set simulator at the key recording point, and performing the positive execution until reaching the ending time point of the needed reverse execution so as to finish positive and reverse execution of the instruction set simulator.

Description

technical field [0001] The invention relates to a program debugging and testing technology, in particular to a method for realizing forward and reverse bidirectional execution of an instruction set simulator. Background technique [0002] Software debugging and testing are effective means to improve software quality and ensure software reliability. The purpose of software testing is to find software errors, and the purpose of software debugging is to locate and correct errors. In the process of software debugging and testing, it is often necessary to make the software execute to a specific moment, so as to facilitate the finding of software problems. Usually in the process of software testing and debugging, in order to quickly locate the error, some important variable content (especially the intermediate results of some variables), or key variables, specific functions, subroutines, procedure calls, and loops are output. Set breakpoints in key parts such as before and after ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for realizing the forward and reverse bidirectional execution of the instruction set simulator, and to solve the problem that the target software program needs to be executed to less than or greater than Compared with the existing technology, the problem of the current simulation time can make the software program execute forward or backward relative to the current time, greatly improving the efficiency and quality of software program debugging and testing

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