test/test44.c

   1
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <fcntl.h>
   5 #include <unistd.h>
   6 #include <sys/mman.h>
   7
   8 int
   9 main(int argc, char *argv[])
  10 {
  11 #define CHUNKSIZE 8192
  12 #define CHUNKS1 3
  13 #define CHUNKS2 2
  14 #define CHUNKS (CHUNKS1+CHUNKS2)
  15         int i, fd;
  16         char *v[CHUNKS];
  17 #define STARTV 0x90000000
  18         char *vaddr = (char *) STARTV;
  19         ssize_t l;
  20
  21         printf("Test 44 ");
  22         fflush(stdout);
  23
  24         for(i = 0; i < CHUNKS; i++) {
  25                 v[i] = mmap(vaddr, CHUNKSIZE, PROT_READ|PROT_WRITE, 0, -1, 0);
  26                 if(v[i] == MAP_FAILED) {
  27                         perror("mmap");
  28                         fprintf(stderr, "mmap failed\n");
  29                         exit(1);
  30                 }
  31                 if(v[i] != vaddr) {
  32                         fprintf(stderr, "mmap said 0x%p but i wanted 0x%p\n",
  33                                 v[i], vaddr);
  34                         exit(1);
  35                 }
  36                 vaddr += CHUNKSIZE;
  37         }
  38
  39 #define DEV_ZERO "/dev/zero"
  40         if((fd=open(DEV_ZERO, O_RDONLY)) < 0) {
  41                 perror("open");
  42                 fprintf(stderr, "open failed for %s\n", DEV_ZERO);
  43                 exit(1);
  44         }
  45
  46 #define TOTAL1 (CHUNKS1*CHUNKSIZE)
  47         /* Make single read cross region boundary. */
  48         if((l=read(fd, v[0], TOTAL1)) != TOTAL1) {
  49                 fprintf(stderr, "read %d but expected %d\n", l, TOTAL1);
  50                 exit(1);
  51         }
  52
  53         /* Force single copy to cross region boundary. */
  54         {
  55                 char *t;
  56                 t = v[CHUNKS1]+CHUNKSIZE-2;
  57                 if((l=read(fd, t, CHUNKSIZE)) != CHUNKSIZE) {
  58                         fprintf(stderr, "read %d but expected %d\n", l, CHUNKSIZE);
  59                         exit(1);
  60                 }
  61         }
  62
  63         printf("ok\n");
  64
  65         exit(0);
  66 }
  67