none/tests/munmap_exe.c

   1 #include <unistd.h>
   2 #include "tests/sys_mman.h"
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 /* Point of this is that the fd of an PROT_EXEC segment is -1, so Valgrind
   7    shouldn't add it to its list of exe segs, and thus it won't be discarded
   8    upon the munmap() (so no "discard" message). */
   9
  10 int main()
  11 {
  12     void* m;
  13
  14     m = mmap(NULL, 100, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
  15
  16     if (m == (void*)-1) {
  17        fprintf(stderr, "error mmapping\n");
  18        exit(1);
  19     }
  20
  21     munmap(m, 100);
  22
  23     return 0;
  24 }