File: munmap_exe.c

package info (click to toggle)
valgrind 1%3A3.14.0-3
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 156,980 kB
  • sloc: ansic: 728,128; exp: 26,134; xml: 22,268; cpp: 7,638; asm: 7,312; makefile: 6,102; perl: 5,910; sh: 5,717
file content (24 lines) | stat: -rw-r--r-- 537 bytes parent folder | download | duplicates (10)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
#include <unistd.h>
#include "tests/sys_mman.h"
#include <stdio.h>
#include <stdlib.h>

/* Point of this is that the fd of an PROT_EXEC segment is -1, so Valgrind
   shouldn't add it to its list of exe segs, and thus it won't be discarded
   upon the munmap() (so no "discard" message). */

int main()
{
    void* m;
    
    m = mmap(NULL, 100, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);

    if (m == (void*)-1) {
       fprintf(stderr, "error mmapping\n");
       exit(1);
    }
    
    munmap(m, 100);

    return 0;
}