pintos-os.org Git - pintos-anon/blob - grading/vm/mmap-overlap.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #ifdef PINTOS
   4 #include <syscall.h>
   5 #else
   6 #include "posix-compat.h"
   7 #endif
   8 #include "sample.inc"
   9
  10 int
  11 main (void)
  12 {
  13   char *start = (char *) 0x10000000;
  14   size_t i;
  15   int fd[2];
  16
  17   printf ("(mmap-overlap) begin\n");
  18
  19   for (i = 0; i < 2; i++)
  20     {
  21       fd[i] = open ("zeros");
  22       if (fd[i] < 0)
  23         {
  24           printf ("(mmap-overlap) open() failed\n");
  25           return 1;
  26         }
  27       if (!mmap (fd[i], start, 8192))
  28         {
  29           if (i == 1)
  30             return 0;
  31           else
  32             {
  33               printf ("(mmap-overlap) mmap() failed\n");
  34               return 1;
  35             }
  36         }
  37       start += 4096;
  38     }
  39
  40   printf ("(mmap-overlap) fail: mmap of overlapped blocks succeeded\n");
  41
  42   /* Done. */
  43   printf ("(mmap-overlap) end\n");
  44
  45   return 0;
  46 }