null pointer access

Null Pointer Vulnerability Protection Technology-PreliminaryIn the security history, the number of vulnerabilities and attacks caused by null pointers is numerous. However, due to its requirements on the programming capability of the caller, the

Http://www.cnblogs.com/losesea/archive/2012/11/16/2772590.htmlFirst say what is a pointer, as long as you understand the meaning of the pointer, you will understand the meaning of NULL.Suppose there is a statement int a=10;Then the compiler opens up

1. The concept of pointers In the computer, all the data is stored in the memory. In general, a byte in memory is called a memory unit, different data types occupy a number of memory units, such as the integer 2 units, the character of 1 units, etc.,

About null pointers, wild pointers, general pointers, first of all, what is a pointer, as long as you understand the meaning of the pointer, you understand the meaning of NULL.Suppose there is a statement int a=10;Then the compiler opens up 1

pointer function 1, the pointer function refers to the function with a pointer, that is, the essence is a function . When a function declares that its return value is a pointer, it actually returns an address to the calling function for use in an

first, what is a null pointer and a wild pointer1. Null pointer 1 > A pointer that does not store any memory address is called a null pointer (null pointer ) 2> null pointer is a pointer that is assigned a value of 0, and its value is 0

directory of this document First, what is a null pointer and a wild pointer Two examples of wild pointers and null pointers Description: This objective-c topic is a prelude to learning iOS development, and to enable programmers

"Turn from" http://www.cnblogs.com/mjios/archive/2013/04/22/3034788.htmlDirectory of this document First, what is a null pointer and a wild pointer Two examples of wild pointers and null pointers Description: This objective-c topic

The pointer has two attributes: the address and length pointing to the variable/object, but the pointer only stores the address. The length depends on the pointer type.The compiler varies the addressing range according to the pointer type from the

I. pointer functions and function pointers When I learned about arm, I found that the "pointer function" and "function pointer" are easy to make mistakes. So today, I want to figure it out and find some information, first, the definitions between