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Adjust as per apb@'s suggestion.

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This commit is contained in:
jruoho 2012-03-29 08:56:06 +00:00
parent 1b769feadc
commit 2090d7b596
1 changed files with 22 additions and 15 deletions
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37
tests/lib/libc/stdlib/t_random.c
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@ -1,4 +1,4 @@
/* $NetBSD: t_random.c,v 1.2 2012/03/28 10:38:00 jruoho Exp $ */
/* $NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@ -29,47 +29,54 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_random.c,v 1.2 2012/03/28 10:38:00 jruoho Exp $");
__RCSID("$NetBSD: t_random.c,v 1.3 2012/03/29 08:56:06 jruoho Exp $");
#include <atf-c.h>
#include <stdio.h>
#include <stdlib.h>
/*
* TODO: Add some general RNG tests (cf. the famous "diehard" tests?).
*/
ATF_TC(random_zero);
ATF_TC_HEAD(random_zero, tc)
ATF_TC(random_same);
ATF_TC_HEAD(random_same, tc)
{
atf_tc_set_md_var(tc, "descr",
"Test that random(3) does not always return "
"zero when the seed is initialized to zero");
"Test that random(3) does not always return the same "
"value when the seed is initialized to zero");
}
ATF_TC_BODY(random_zero, tc)
#define MAX_ITER 10
ATF_TC_BODY(random_same, tc)
{
const size_t n = 1000000;
long buf[MAX_ITER];
size_t i, j;
long x;
/*
* See CVE-2012-1577.
*/
srandom(0);
for (i = j = 0; i < n; i++) {
for (i = 0; i < __arraycount(buf); i++) {
if ((x = random()) == 0)
j++;
buf[i] = random();
for (j = 0; j < i; j++) {
(void)fprintf(stderr, "i = %zu, j = %zu: "
"%ld vs. %ld\n", i, j, buf[i], buf[j]);
ATF_CHECK(buf[i] != buf[j]);
}
}
ATF_REQUIRE(j != n);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, random_zero);
ATF_TP_ADD_TC(tp, random_same);
return atf_no_error();
}