Stack self-check method and device

Abstract

The invention provides a stack self-inspection method and a stack self-inspection device. The method comprises the following steps: a main function for controlling a program calls a preset stack self-inspection subfunction to perform self-inspection when the program starts, wherein the preset stack self-inspection subfunction defines a preset size of local variable array and values of all local variables in the local variable array, and the preset size is much larger than the size of a stack used when the subfunction enabling the program to operate normally is called; after the preset stack self-inspection subfunction sends a return value to the main function, the main function is controlled to call the subfunction enabling the program to operate normally, and a compiler distributes a stack area used by the preset stack self-inspection subfunction for the subfunction enabling the program to operate normally; and when the self-inspection of the preset stack self-inspection subfunction is not passed, the program is positioned in an idle loop dead state and no longer returned. According to the method and the device provided by the invention, the C language stack can be effectively and rapidly self-inspected, operation reliability of a system is not influenced, and operation efficiency of the program is improved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a stack self-check method and device. Background technique [0002] The key control equipment used in rail transit, nuclear power, aircraft and other environments needs to meet the SIL4 safety level requirements. According to the requirements of IEC 61508, EN50129 and other standards, products that meet the SIL4 safety level requirements need to use the memory used by the processor used in the equipment. Do a self-test. [0003] In the C language compilation environment, the memory used by the processor mainly includes the following spaces: (1) the stack area (stack), which is used to store function parameter values, local variables, and key registers; (2) the heap area ( heap), which is generally allocated and released by the programmer according to the use; (3) static area (static), used to store global variables and static variables; (4) literal constant area, used to store...

AI Technical Summary

Problems solved by technology

Although this method can realize real-time self-inspection, the stack self-inspection function needs to be written in assembly language. During the execution of the stack self-inspection function, all interrupts need to be closed, which will affect the reliability of the system operation.

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