64位系统下进程的内存布局

环境

1. 操作系统：ubuntu15.04
2. 物理内存：4G

测试程序

#include<stdio.h>
#include<stdlib.h>

int  a;
int  b=1;

main()
{
    int  n = 0;
    char *p1 = NULL;
    char *p2 = NULL;
    const int s = 10;
    p1 = (char*)malloc(200);
    p2 = "hello";

    printf("main