1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <tst-stack-align.h>
4 
5 struct big { char c[4 * 1024]; };
6 
7 struct big *array;
8 struct big *array_end;
9 
10 static int align_check;
11 
12 int
compare(void const * a1,void const * b1)13 compare (void const *a1, void const *b1)
14 {
15   struct big const *a = a1;
16   struct big const *b = b1;
17 
18   if (!align_check)
19     align_check = TEST_STACK_ALIGN () ? -1 : 1;
20 
21   if (! (array <= a && a < array_end
22 	 && array <= b && b < array_end))
23     {
24       exit (EXIT_FAILURE);
25     }
26   return b->c[0] - a->c[0];
27 }
28 
29 int
main(int argc,char ** argv)30 main (int argc, char **argv)
31 {
32   size_t i;
33   size_t array_members = argv[1] ? atoi (argv[1]) : 50;
34   array = (struct big *) malloc (array_members * sizeof *array);
35   if (array == NULL)
36     {
37       puts ("no memory");
38       exit (EXIT_FAILURE);
39     }
40 
41   array_end = array + array_members;
42   for (i = 0; i < array_members; i++)
43     array[i].c[0] = i % 128;
44 
45   qsort (array, array_members, sizeof *array, compare);
46 
47   if (align_check == -1)
48     {
49       puts ("stack not sufficiently aligned");
50       exit (EXIT_FAILURE);
51     }
52 
53   return 0;
54 }
55