进程各个不同数据段的位置

来源：互联网发布：手机无法安装软件编辑：程序博客网时间：2024/05/21 22:55

#include<stdio.h>
#include<malloc.h>
#include<unistd.h>

int bss_var;
int data_var0=1;

int main(int argc,char **argv)
{
printf("below are addresses of types of process's mem\n");
printf("Text location:\n");
printf("\tAddress of main(Code Segment):%p\n",main);

printf("____________________________\n");
int stack_var0=2;
printf("Stack Location:\n");
printf("\tInitial end of stack:%p\n",&stack_var0);

int stack_var1=3;
printf("\tnew end of stack:%p\n",&stack_var1);

printf("____________________________\n");
printf("Data Location:\n");
printf("\tAddress of data_var(Data Segment):%p\n",&data_var0);
static int data_var1=4;
printf("\tNew end of data_var(Data Segment):%p\n",&data_var1);

printf("____________________________\n");
printf("BSS Location:\n");
printf("\tAddress of bss_var:%p\n",&bss_var);

printf("____________________________\n");
char *b = sbrk((ptrdiff_t)0);
printf("Heap Location:\n");
printf("\tInitial end of heap:%p\n",b);

brk(b+4);
b=sbrk((ptrdiff_t)0);
printf("\tNew end of heap:%p\n",b);

return 0;
}
结果：

below are addresses of types of process's mem
Text location:
Address of main(Code Segment):0x8048454
____________________________
Stack Location:
Initial end of stack:0xbfda9a10
new end of stack:0xbfda9a0c
____________________________
Data Location:
Address of data_var(Data Segment):0x804a020
New end of data_var(Data Segment):0x804a024
____________________________
BSS Location:
Address of bss_var:0x804a030
____________________________
Heap Location:
Initial end of heap:0x90c6000
New end of heap:0x90c6004

+-------------------------------- 高地址

+ main函数的栈帧

+--------------------------------

+ 被调用函数的栈帧

+--------------------------------

+ ......

+--------------------------------

+ 堆(heap)

+--------------------------------

+ BSS 未初始化全局数据

+--------------------------------

+ Data 初始化的全局数据

+--------------------------------

+ Text 代码段

+--------------------------------