4
Virtual Address
! Every address in a running program is virtual.
! OS translates the virtual address to physical address
1. #include <stdio.h>
2. #include <stdlib.h>
3. int main(int argc, char *argv[]){
4. printf("location of code : %p\n", (void *) main);
5. printf("location of heap : %p\n", (void *) malloc(1));
6. int x = 3;
7. printf("location of stack : %p\n", (void *) &x);
8. return x;
9. }
A simple program that prints out addresses
• code ： 存放程序执行代码
• stack ： 由编译器自动分配释放，存放函数
的参数值，局部变量等值
• heap ： 存放进程运行中被动态分配的内存
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