Method and device for patching code-sharing section

Abstract

The embodiment of the invention provides a method and a device for patching a code-sharing section. The method for patching the code-sharing section comprises the following steps: before a primitive function is patched, modifying a first instruction of the primitive function into an instruction of jumping to an anomaly processing in a shared memory, wherein the primitive function is a sharing function needing patching; transmitting a first interruption message to each service VCPU, wherein the first interruption message is used for instructing each service VCPU to interrupt current services and instantly refresh fast instruction buffer areas per se; modifying the first instruction and a second instruction of the primitive function into the instructions of jumping to a patching function; and transmitting a second interruption message to each service VCPU for instructing each service VCPU to interrupt the current services and instantly refresh the fast instruction buffer areas per se. The embodiment of the invention realizes patching operation on the code-sharing section and makes patches quickly come into effect under the condition of not influencing the normal service processing of the service VCPUs.

Description

technical field [0001] The embodiment of the present invention relates to the field of computer technology, and in particular to a method and device for patching a shared code segment. Background technique [0002] As a means of upgrading, the patching technology is getting more and more attention. During the operation of the computer system, some errors in the software often cause the system to appear abnormal or crash. In order to make up for such errors, patch technology can be used to upgrade the problematic software. During this process, normal business processing will not be affected. [0003] Errors in software often exist in one or more functions, and these original functions with errors will be called by other functions. Although it is difficult to find these calling functions, it is easy to find the original function that is wrong. Therefore, the key operation of patching should focus on these original functions that have errors. The process of patching is: whe...

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for patching a shared code segment to solve the problem that the patch takes effect in the existing method for patching a shared code segment The defect of affecting the normal business processing of the business VCPU over a long period of time realizes the patch operation on the shared code segment and makes the patch take effect quickly without affecting the normal business processing of the business VCPU

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