File: munmap_exe.c

package info (click to toggle)
valgrind 1%3A3.6.0~svn11254%2Bnmu1
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 36,460 kB
  • ctags: 39,734
  • sloc: ansic: 339,440; sh: 15,713; xml: 15,183; cpp: 6,982; asm: 6,630; perl: 5,105; makefile: 3,576; exp: 678; haskell: 250
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;
}