进程的虚拟内存中的开始和结束地址

Question

I have a C program I have written and I am attempting to make a memory map of it.

How do I print to the screen the starting address and end address (within virtual memory) of the environment of the process.

The program is and always will be run on linux, not sure if that makes a difference, but it doesn't need any kind of portability.

I am looking for something that would preferably just give me a hexadecimal address of the start and end.

Answer 1

Take a look at this example in C programming.

user@linux:~$ cat hello.c 
#include<stdio.h>

int main()
{
 printf("Hello World\n");
 getchar();
}
user@linux:~$ gcc hello.c -o hello
user@linux:~$ ./hello 
Hello World

Open another console to find out the process id (pid). Run ps command as follows; Change hello with your program name.

In this case, the process id (pid) is 2011

user@linux:~$ ps -ef | grep hello | grep -v grep
user      2011  1864  0 17:21 pts/2    00:00:00 ./hello
user@linux:~$ 

Then, check your /proc/[pid]/maps file with cat command

user@linux:~$ cat /proc/2011/maps | grep stack
bffeb000-c0000000 rw-p 00000000 00:00 0          [stack]
user@linux:~$ 

Alternatively, you can also use pmap command

user@linux:~$ pmap 2011 | grep stack
bffeb000     84K rw---    [ stack ]
user@linux:~$ 

In both cases, we can see that stack start at address bffeb000

Answer 2

As per your requirement i think you can get the memory map of a particular process if you know its PID. Use the command " pmap " for more info http://linux.die.net/man/1/pmap .

& if u want to print it in ur program then try to get pid with the help of function getpid() ; and then use system() call to execute the pmap command.

Answer 3

您可以简单地打印出/proc/[PID]/maps文件的内容，其中[PID]是您的进程的进程标识符的值（调用getpid()找出该值是什么）。