tests/cris/check_mmap2.c

   1 /*
   2 #notarget: cris*-*-elf
   3 */
   4
   5 #define _GNU_SOURCE
   6 #include <string.h>
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <fcntl.h>
  12 #include <unistd.h>
  13 #include <sys/mman.h>
  14
  15 int main (int argc, char *argv[])
  16 {
  17   int fd = open (argv[0], O_RDONLY);
  18   struct stat sb;
  19   int size;
  20   void *a;
  21   const char *str = "a string you'll only find in the program";
  22
  23   if (fd == -1)
  24     {
  25       perror ("open");
  26       abort ();
  27     }
  28
  29   if (fstat (fd, &sb) < 0)
  30     {
  31       perror ("fstat");
  32       abort ();
  33     }
  34
  35   size = sb.st_size;
  36
  37   /* We want to test mmapping a size that isn't exactly a page.  */
  38   if ((size & 8191) == 0)
  39     size--;
  40
  41   a = mmap (NULL, size, PROT_READ, MAP_SHARED, fd, 0);
  42
  43   if (memmem (a, size, str, strlen (str) + 1) == NULL)
  44     abort ();
  45
  46   printf ("pass\n");
  47   exit (0);
  48 }