Linux下的段错误产生的原因及调试方法（国外英文资料）.docVIP

Linux下的段错误产生的原因及调试方法（国外英文资料） Reference: /html/2006-11/775.html Segment error is, in short, visit the wrong memory segment, typically you do not have permissions, or does not exist corresponding physical memory, is especially common access address 0. Generally speaking, the period of error is refers to access memory outside the system to the program memory space, this value is usually performed by GDTR saved, he is a 48 register, which is a 32-bit preserved by it points to the GDT table, after 13 save corresponding to the GDT subscript, the last three includes whether the program in memory as well as the application in the CPU run level, pointing to the GDT is by 64 as a unit of the table, in this form is kept program run the starting address of the code and data segments and exchange and with limit and the corresponding page program run level information and memory size, and so on. Once a program in the cross-border access, the CPU will generate corresponding abnormal protection, so the segmentation fault occurs. In programming, the following types of actions can easily lead to a section error, which is caused by the wrong use of a pointer 1) access the system data area, especially the system protected memory address The most common is to give a pointer to a 0 address 2) access to memory areas that are not part of your memory (array overbounds, variable type, etc.) The solution When we write programs in C/C + + languages, we do most of the work in memory management. In fact, memory management is a relatively tedious work, no matter how smart you are, the more experienced, hard to avoid can make small mistake here, and often these errors is so simple and easy to eliminate. But the manual pest control (debug), tend to be inefficient and boring, this article will discuss the memory access cross-border segmentation fault error to talk about how to quickly locate the statement of segmentation fault. Heres a list of debugging tips for the following: 1 dummy_function (void