A kind of hot patch injection method and device

Abstract

The invention discloses a hot patch injection method and device, relating to the field of computer software. The method loads the patch code into the target process, and when it is determined that the consecutive N lines of instructions starting from the first address in the replaced code are not run by any thread , modify the N lines of instructions to jump to the first address of the patch code, and jump from the replaced code to the patch code during the running process, so as to realize hot patch injection without the need to be injected into the process Pre-compiled also reduces the consumption of hot patch injection. Before modifying the N lines of instructions to jump to the first address of the patch code, it is determined that the consecutive N lines of instructions starting from the first address in the replaced code are not executed by any thread, which also reduces the patch loading time. run risk.

Description

technical field [0001] The invention relates to the field of computer software, in particular to a hot patch injection method and device. Background technique [0002] For a running software system, if you want to expand some functions or fix some software problems, but require that the system cannot be reset, you need to apply a hot patch to the system. [0003] Hot patching is to modify and recompile the function to be replaced in the original software system separately to form a hot patch unit, and then load it into the running target software system through the hot patch loading tool to replace the original function. [0004] However, the currently used hot patch technology has two problems. One is that there needs to be pre-compiled code in the injected process to be responsible for the replacement of the patched function by the patch function; the other is that when the first few instructions of the function to be replaced When modifying to jump to the new patch funct...

AI Technical Summary

Problems solved by technology

[0004] However, the currently used hot patch technology has two problems. One is that there needs to be pre-compiled code in the injected process to be responsible for the replacement of the patched function by the patch function; the other is that when the first few instructions of the function to be replaced When modifying to jump to the new patch function, there is a risk in patch loading. The existing solutions to solve this risk have narrow application areas, are not universal, and increase the consumption of additional memory and CPU.

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