Function hijacking method and device, medium and electronic equipment

Abstract

The invention provides a function hijacking method and device, a medium and electronic equipment. The function hijacking method comprises the steps of obtaining an absolute starting address of a firstjump table in a first memory; acquiring an absolute address of the hijacked system function pointer variable based on the absolute initial address of the first jump table and the data structure of the first jump table; and writing an entry address of a preset hijacking function into the absolute address of the hijacked system function pointer variable. The invention includes obtaining the absolute address of the hijacked system function pointer variable through the absolute initial address of the jump table and the data structure of the jump table, and changing the absolute address value of the hijacked system function pointer variable in the jump table from the hijacked system function entry address to the entry address of the preset hijacking function. By modifying one entry address inthe jump table, the purpose of obtaining the debugging information of the hidden hijacked system function is achieved. On the basis of maintaining the original functions, the original high-concurrencyoperation environment of the system is reserved, and the operation stability, safety and reliability of the system are ensured. Under the condition that the operation condition of the hijacked systemfunction is monitored, the debugging requirement of the hijacked system function in a high-concurrency environment is met.

Description

technical field [0001] The present disclosure relates to the field of computer technology, in particular, to a function hijacking method, device, medium and electronic equipment. Background technique [0002] A memory leak is a space that is dynamically opened up by the dynamic storage allocation function and is not released after use. As a result, the memory unit is occupied until the end of the program. Memory leaks are a difficult bug to locate and track down. Code that leaks memory only occurs under certain circumstances or operating procedures. [0003] Memory out of bounds means that after the system has applied for a piece of memory, it exceeds the application range when using it. [0004] The memory field pointer is that the location pointed by the pointer is unknown (random, incorrect, and without clear restrictions). If the pointer variable is not initialized when it is defined, its value is random, and the value of the pointer variable is the address of other v...

AI Technical Summary

Problems solved by technology

However, both of these two methods reduce the running speed of the program due to the use of complex system hooks, destroying the environment where the original program runs with high concurrency, and cannot meet the debugging requirements in a high-concurrency environment.

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