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glibc/stdlib/tst-qsort.c
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/* 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; | |
} |