/* $NetBSD: t_posix_memalign.c,v 1.8 2023/07/05 12:09:39 riastradh Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_posix_memalign.c,v 1.8 2023/07/05 12:09:39 riastradh Exp $");
#include <atf-c.h>
#include <errno.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define rounddown(x, n) (((x) / (n)) * (n))
ATF_TC(posix_memalign_basic);
ATF_TC_HEAD(posix_memalign_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks posix_memalign(3)");
}
ATF_TC_BODY(posix_memalign_basic, tc)
{
enum { maxaligntest = 16384 };
static const size_t align[] = {
0, 1, 2, 3, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096,
8192, maxaligntest,
};
static const size_t size[] = {
0, 1, 2, 3, 4, 10, 100, 10000, 16384, 32768, 65536,
rounddown(SIZE_MAX, maxaligntest),
};
size_t i, j;
for (i = 0; i < __arraycount(align); i++) {
for (j = 0; j < __arraycount(size); j++) {
void *p = (void *)0x1;
const int ret = posix_memalign(&p, align[i], size[j]);
if (align[i] == 0 ||
(align[i] & (align[i] - 1)) != 0 ||
align[i] < sizeof(void *)) {
ATF_CHECK_EQ_MSG(ret, EINVAL,
"posix_memalign(&p, %zu, %zu): %s",
align[i], size[j], strerror(ret));
continue;
}
if (size[j] == rounddown(SIZE_MAX, maxaligntest) &&
ret != EINVAL) {
/*
* If obscenely large alignment isn't
* rejected as EINVAL, we can't
* allocate that much memory anyway.
*/
ATF_CHECK_EQ_MSG(ret, ENOMEM,
"posix_memalign(&p, %zu, %zu): %s",
align[i], size[j], strerror(ret));
continue;
}
/*
* Allocation should fail only if the alignment
* isn't supported, in which case it will fail
* with EINVAL. No standard criterion for what
* alignments are supported, so just stop here
* on EINVAL.
*/
if (ret == EINVAL)
continue;
ATF_CHECK_EQ_MSG(ret, 0,
"posix_memalign(&p, %zu, %zu): %s",
align[i], size[j], strerror(ret));
ATF_CHECK_EQ_MSG((intptr_t)p & (align[i] - 1), 0,
"posix_memalign(&p, %zu, %zu): %p",
align[i], size[j], p);
if (size[j] != 0) {
if (p == NULL) {
atf_tc_fail_nonfatal(
"%s:%d:"
"posix_memalign(&p, %zu, %zu):"
" %p",
__FILE__, __LINE__,
align[i], size[j], p);
}
} else {
/*
* No guarantees about whether
* zero-size allocation yields null
* pointer or something else.
*/
}
free(p);
}
}
}
ATF_TC(aligned_alloc_basic);
ATF_TC_HEAD(aligned_alloc_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks aligned_alloc(3)");
}
ATF_TC_BODY(aligned_alloc_basic, tc)
{
enum { maxaligntest = 16384 };
static const size_t align[] = {
0, 1, 2, 3, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096,
8192, maxaligntest,
};
static const size_t size[] = {
0, 1, 2, 3, 4, 10, 100, 10000, 16384, 32768, 65536,
rounddown(SIZE_MAX, maxaligntest),
};
size_t i, j;
for (i = 0; i < __arraycount(align); i++) {
for (j = 0; j < __arraycount(size); j++) {
void *const p = aligned_alloc(align[i], size[j]);
/*
* C17, 6.2.8 Alignment of objects, paragraph
* 4, p. 37:
*
* Every valid alignment value shall be a
* nonnegative integral power of two.
*
* C17, 7.22.3.1 The aligned_alloc function,
* paragraph 2, p. 348:
*
* If the value of alignment is not a
* valid alignment supported by the
* implementation the function shall fail
* by returning a null pointer.
*
* Setting errno to EINVAL is a NetBSD
* extension. The last clause appears to rule
* out aligned_alloc(n, 0) for any n, but it's
* not clear.
*/
if (align[i] == 0 ||
(align[i] & (align[i] - 1)) != 0) {
if (p != NULL) {
ATF_CHECK_EQ_MSG(p, NULL,
"aligned_alloc(%zu, %zu): %p",
align[i], size[j], p);
continue;
}
ATF_CHECK_EQ_MSG(errno, EINVAL,
"aligned_alloc(%zu, %zu): %s",
align[i], size[j], strerror(errno));
continue;
}
if (size[j] == rounddown(SIZE_MAX, maxaligntest)) {
ATF_CHECK_EQ_MSG(p, NULL,
"aligned_alloc(%zu, %zu): %p, %s",
align[i], size[j], p, strerror(errno));
ATF_CHECK_MSG((errno == EINVAL ||
errno == ENOMEM),
"aligned_alloc(%zu, %zu): %s",
align[i], size[j],
strerror(errno));
continue;
}
/*
* Allocation should fail only if the alignment
* isn't supported, in which case it will fail
* with EINVAL. No standard criterion for what
* alignments are supported, so just stop here
* on EINVAL.
*/
if (p == NULL && errno == EINVAL)
continue;
ATF_CHECK_EQ_MSG((intptr_t)p & (align[i] - 1), 0,
"aligned_alloc(%zu, %zu): %p",
align[i], size[j], p);
if (size[j] != 0) {
ATF_CHECK_MSG(p != NULL,
"aligned_alloc(&p, %zu, %zu): %p, %s",
align[i], size[j], p,
strerror(errno));
} else {
/*
* No guarantees about whether
* zero-size allocation yields null
* pointer or something else.
*/
}
free(p);
}
}
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, posix_memalign_basic);
ATF_TP_ADD_TC(tp, aligned_alloc_basic);
return atf_no_error();
}