linux – 为什么我的Rust可执行文件映射到这样的高地址(靠近堆栈

fn main() {
    let x = 3;        // should be stored on stack
    let s = "hello";  // should be in the .data section

    println!("stack ≈ {:p}",&x);
    println!(".text ≈ {:p}",main as *const ());
    println!(".data ≈ {:p}",s);


    use std::io;

    let mut f = std::fs::File::open("/proc/self/maps").unwrap();
    let out = io::stdout();
    io::copy(&mut f,&mut out.lock()).unwrap();
}

此代码还将文件/ proc / self / maps打印到stdout.我用rustc mem.rs编译了这个文件mem.rs.它打印：

stack ≈ 0x7ffffbf82f2c
.text ≈ 0x7f45b7c0a2b0
.data ≈ 0x7f45b7c4d35b

7f45b6800000-7f45b6c00000 rw-- 00000000 00:00 0
7f45b6de0000-7f45b6f9a000 r-x- 00000000 00:00 664435             /lib/x86_64-linux-gnu/libc-2.19.so
7f45b6f9a000-7f45b6fa2000 ---- 001ba000 00:00 664435             /lib/x86_64-linux-gnu/libc-2.19.so
[ ... more .so files]
7f45b7a22000-7f45b7a23000 r--- 00022000 00:00 663920             /lib/x86_64-linux-gnu/ld-2.19.so
7f45b7a23000-7f45b7a24000 rw-- 00023000 00:00 663920             /lib/x86_64-linux-gnu/ld-2.19.so
7f45b7a24000-7f45b7a25000 rw-- 00000000 00:00 0
7f45b7aa0000-7f45b7aa2000 rw-- 00000000 00:00 0
7f45b7ab0000-7f45b7ab2000 rw-- 00000000 00:00 0
7f45b7ac0000-7f45b7ac1000 rw-- 00000000 00:00 0
7f45b7ad0000-7f45b7ad1000 rw-- 00000000 00:00 0
7f45b7ae0000-7f45b7ae2000 rw-- 00000000 00:00 0
7f45b7c00000-7f45b7c5f000 r-x- 00000000 00:00 1134580            /home/lukas/tmp/mem
7f45b7e5e000-7f45b7e62000 r--- 0005e000 00:00 1134580            /home/lukas/tmp/mem
7f45b7e62000-7f45b7e63000 rw-- 00062000 00:00 1134580            /home/lukas/tmp/mem
7f45b7e63000-7f45b7e64000 rw-- 00000000 00:00 0
7ffffb784000-7ffffb785000 ---- 00000000 00:00 0                  [stack]
7ffffb785000-7ffffbf84000 rw-- 00000000 00:00 0
7ffffc263000-7ffffc264000 r-x- 00000000 00:00 0                  [vdso]

至少我自己打印的地址似乎与地图所说的相符.但是当我在终端中执行cat / proc / self / maps时,我得到了这个输出：

00400000-0040b000 r-x- 00000000 00:00 107117                     /bin/cat
0060a000-0060b000 r--- 0000a000 00:00 107117                     /bin/cat
0060b000-0060c000 rw-- 0000b000 00:00 107117                     /bin/cat
0071c000-0073d000 rw-- 00000000 00:00 0                          [heap]
7f7deb933000-7f7debc30000 r--- 00000000 00:00 758714             /usr/lib/locale/locale-archive
7f7debc30000-7f7debdea000 r-x- 00000000 00:00 664435             /lib/x86_64-linux-gnu/libc-2.19.so
7f7debdea000-7f7debdf2000 ---- 001ba000 00:00 664435             /lib/x86_64-linux-gnu/libc-2.19.so
[ ... more .so files ...]
7f7dec222000-7f7dec223000 r--- 00022000 00:00 663920             /lib/x86_64-linux-gnu/ld-2.19.so
7f7dec223000-7f7dec224000 rw-- 00023000 00:00 663920             /lib/x86_64-linux-gnu/ld-2.19.so
7f7dec224000-7f7dec225000 rw-- 00000000 00:00 0
7f7dec250000-7f7dec252000 rw-- 00000000 00:00 0
7f7dec260000-7f7dec261000 rw-- 00000000 00:00 0
7f7dec270000-7f7dec272000 rw-- 00000000 00:00 0
7ffff09e8000-7ffff11e8000 rw-- 00000000 00:00 0                  [stack]
7ffff1689000-7ffff168a000 r-x- 00000000 00:00 0                  [vdso]

后一个结果与我读到的关于此主题的所有内容相匹配：可执行文件中的部分映射在虚拟地址空间的下端(从0x400000开始).

我执行并编译了Linux子系统Windows(基本上是Ubuntu 14.04)中的所有内容.我知道,这是新的和东西,但我很确定这不是子系统的问题(请告诉我,不管它是什么！). Rust 1.14很重要(我对此表示怀疑),

我也尝试了同样的C程序(原谅我可能不好的C)：

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

int main(int argc,char **argv) {
    FILE *test_file;
    char buf[4096];
    if ((test_file = fopen ("/proc/self/maps","r")) != NULL) {
        while (!feof (test_file)) {
            fgets (buf,sizeof (buf),test_file);
            puts (buf);
        }
    }

    return 0;
}

它输出类似于cat的东西：

为什么Rust可执行文件映射到堆栈附近的大地址？
00400000-00401000 r-x- 00000000 00:00 1325490                    /home/lukas/tmp/a.out
0
fn main() {
    let x = 3;        // should be stored on stack
    let s = "hello";  // should be in the .data section

    println!("stack ≈ {:p}",&mut out.lock()).unwrap();
}
fn main() {
    let x = 3;        // should be stored on stack
    let s = "hello";  // should be in the .data section

    println!("stack ≈ {:p}",&mut out.lock()).unwrap();
}00-00601000 r--- 00000000 00:00 1325490 /home/lukas/tmp/a.out
 00601000-00602000 rw-- 00001000 00:00 1325490 /home/lukas/tmp/a.out