Space-determined task scheduling method

Abstract

A space-determined task scheduling method comprises the steps that firstly, the spatial sizes of code areas and the spatial sizes of data areas are determined in the compilation process in the mode of conducting definition statically in advance; secondly, after internal storage is loaded by starting the loading process, the start physical addresses and sizes of the spaces of the code areas and the spaces of the data areas are determined statically; thirdly, safety protection is conducted on the code areas and the data areas through a safety protection mechanism, and writing access for configuration data, mapping files and an interruption vector table of the code areas and the data areas is avoided; fourthly, the specific code areas and the specific data areas are isolated; fifthly, abnormities triggered through access are taken over by an interruption and service routine, and error spreading is avoided. According to the space-determined task scheduling method, protection on an illegal pointer can be enhanced, the situation of collapsing of core data of a task scheduler can be found and positioned as soon as possible, and the safety of task scheduler platform software can be further improved.

Description

technical field [0001] The invention belongs to the field of computer operating system platform software, and relates to a space-determined task scheduling method, in particular to a task scheduler with fixed number of elements (tasks, semaphores, etc.), fixed handle space, code space and data space. Recovery methods for isospace determination and error checking. Background technique [0002] The commonly used operating systems in the embedded field include linux, ucOS, vxWorks, etc. These operating systems provide operating system elements and APIs such as multitasking and semaphores, but these elements can basically be dynamically created and maintained, and the number of them is constantly changing , The handles are discretely distributed in the memory, which makes it difficult to check if the references to these operating system elements are abnormal; especially once the data structure area is damaged, the error often spreads to a certain extent in the application before...

AI Technical Summary

Problems solved by technology

[0002] The commonly used operating systems in the embedded field include linux, ucOS, vxWorks, etc. These operating systems provide operating system elements and APIs such as multitasking and semaphores, but these elements can basically be dynamically created and maintained, and the number of them is constantly changing , Handles are discretely distributed in the memory, making it difficult to check if the references to these operating system elements are abnormal; especially once the data structure area is damaged, the error often spreads to a certain extent in the application before it is discovered