/* Test case by Paul Eggert <eggert@twinsun.com> */ #include <stdio.h> #include <stdlib.h> #include <tst-stack-align.h> struct big { char c[4 * 1024]; }; struct big *array; struct big *array_end; static int align_check; int compare (void const *a1, void const *b1) { struct big const *a = a1; struct big const *b = b1; if (!align_check) align_check = TEST_STACK_ALIGN () ? -1 : 1; if (! (array <= a && a < array_end && array <= b && b < array_end)) { exit (EXIT_FAILURE); } return b->c[0] - a->c[0]; } int main (int argc, char **argv) { size_t i; size_t array_members = argv[1] ? atoi (argv[1]) : 50; array = (struct big *) malloc (array_members * sizeof *array); if (array == NULL) { puts ("no memory"); exit (EXIT_FAILURE); } array_end = array + array_members; for (i = 0; i < array_members; i++) array[i].c[0] = i % 128; qsort (array, array_members, sizeof *array, compare); if (align_check == -1) { puts ("stack not sufficiently aligned"); exit (EXIT_FAILURE); } return 0; }