segfault

A segfault occurs when a program attempts to access a memory location that is not allowed to access, or attempts to access a memory location in a way is not allowed.

// segfault.cpp : Defines the entry point for the console application.

//



#include "stdafx.h"

#include <string.h>



int _tmain(int argc, _TCHAR* argv[])

{

    char a[2];

    char b[] = "Hello world!";



    memcpy(a, b, strlen(b));

    return 0;

}

上述示例也就是我们常说的越界访问！