10 #define MAX(a, b) ((a) > (b) ? (a) : (b))
14 main (int argc, char *argv[])
16 size_t size = sysconf (_SC_PAGESIZE);
20 adr = (char *) mmap (NULL, 3 * size, PROT_READ|PROT_WRITE,
21 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
22 dest = (char *) mmap (NULL, 3*size, PROT_READ|PROT_WRITE,
23 MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
24 if (adr == (char *)-1L || dest == (char *)-1L)
27 puts ("No test, mmap not available.");
30 printf ("mmaping failed: %m");
36 int inner, middle, outer;
38 mprotect(adr, size, PROT_NONE);
39 mprotect(adr+2*size, size, PROT_NONE);
42 mprotect(dest, size, PROT_NONE);
43 mprotect(dest+2*size, size, PROT_NONE);
46 memset (adr, 'T', size);
49 for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
51 for (inner = MAX (outer, size - 64); inner < size; ++inner)
55 if (strlen (&adr[outer]) != inner - outer)
57 printf ("strlen flunked for outer = %d, inner = %d\n",
67 for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
69 for (middle = MAX (outer, size - 64); middle < size; ++middle)
71 for (inner = middle; inner < size; ++inner)
77 cp = strchr (&adr[outer], 'V');
79 if ((inner == middle && cp != NULL)
81 && (cp - &adr[outer]) != middle - outer))
83 printf ("strchr flunked for outer = %d, middle = %d, "
84 "inner = %d\n", outer, middle, inner);
95 for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
97 for (middle = MAX (outer, size - 64); middle < size; ++middle)
99 for (inner = middle; inner < size; ++inner)
105 cp = strrchr (&adr[outer], 'V');
107 if ((inner == middle && cp != NULL)
109 && (cp - &adr[outer]) != middle - outer))
111 printf ("strrchr flunked for outer = %d, middle = %d, "
112 "inner = %d\n", outer, middle, inner);
123 for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
125 for (inner = MAX (outer, size - 64); inner < size; ++inner)
129 if (strcpy (dest, &adr[outer]) != dest
130 || strlen (dest) != inner - outer)
132 printf ("strcpy flunked for outer = %d, inner = %d\n",
142 for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
144 for (inner = MAX (outer, size - 64); inner < size; ++inner)
148 if ((stpcpy (dest, &adr[outer]) - dest) != inner - outer)
150 printf ("stpcpy flunked for outer = %d, inner = %d\n",