Method and device for memory diagnosis

Abstract

The present invention provides a method and device for memory diagnosis, including dividing the memory area into variable memory area and immutable memory area in advance, and further dividing the first area in the variable memory area as the first stack area, and drawing out the second stack area. The second area is used as the second stack area, and the two stack areas are used alternately, that is, one stack area is used for memory diagnosis, and the other stack area is used as the stack area for the normal operation of the system. For the immutable memory area, the present invention calculates the actual check code of the data in the immutable memory area, and compares the actual check code with the source check code to realize the diagnosis of the immutable memory area; for the variable memory area, if The current memory area to be diagnosed is a stack area, then after the stack area is successfully switched to another stack area, call the preset memory diagnosis algorithm to diagnose the current memory area to be diagnosed, otherwise, directly call the preset memory diagnosis The algorithm diagnoses the memory area currently to be diagnosed. The invention realizes the diagnosis test of all memory areas in the system.

Description

technical field [0001] The invention relates to the technical field of safe computer systems, in particular to a memory diagnosis method and device. Background technique [0002] A safety-critical system refers to a system that requires extremely high levels of security for the software and hardware that make up the system. The operation of a safety-critical system is directly related to the safety of personnel and property. [0003] Self-diagnosis refers to the technology that the system detects and handles faults or failure events by setting diagnostic functions, and is an important means to improve system security and reliability. [0004] The data segment refers to a memory area used to store initialized global variables in the program. The data segment is a static memory allocation. [0005] The code segment refers to a memory area used to store program execution code. The size of this part of the area has been determined before the program runs, and the memory area ...

AI Technical Summary

Problems solved by technology

[0019] In view of this, the present invention provides a memory diagnosis method and device to solve the problem that the existing memory diagnosis method cannot realize the diagnosis test for all memory areas, and there is a diagnostic blind area

Images