t_memset.c revision 313498
1/* $NetBSD: t_memset.c,v 1.4 2015/09/11 09:25:52 martin Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_memset.c,v 1.4 2015/09/11 09:25:52 martin Exp $");
33
34#include <sys/stat.h>
35
36#include <atf-c.h>
37#include <stdlib.h>
38#include <string.h>
39#include <unistd.h>
40
41static long	page = 0;
42static void	fill(char *, size_t, char);
43static bool	check(char *, size_t, char);
44
45int zero;	/* always zero, but the compiler does not know */
46
47ATF_TC(memset_array);
48ATF_TC_HEAD(memset_array, tc)
49{
50	atf_tc_set_md_var(tc, "descr", "Test memset(3) with arrays");
51}
52
53ATF_TC_BODY(memset_array, tc)
54{
55	char buf[1024];
56
57	(void)memset(buf, 0, sizeof(buf));
58
59	if (check(buf, sizeof(buf), 0) != true)
60		atf_tc_fail("memset(3) did not fill a static buffer");
61
62	(void)memset(buf, 'x', sizeof(buf));
63
64	if (check(buf, sizeof(buf), 'x') != true)
65		atf_tc_fail("memset(3) did not fill a static buffer");
66}
67
68ATF_TC(memset_return);
69ATF_TC_HEAD(memset_return, tc)
70{
71	atf_tc_set_md_var(tc, "descr", "Test memset(3) return value");
72}
73
74ATF_TC_BODY(memset_return, tc)
75{
76	char *b = (char *)0x1;
77	char c[2];
78	ATF_REQUIRE_EQ(memset(b, 0, 0), b);
79	ATF_REQUIRE_EQ(memset(c, 2, sizeof(c)), c);
80}
81
82ATF_TC(memset_basic);
83ATF_TC_HEAD(memset_basic, tc)
84{
85	atf_tc_set_md_var(tc, "descr", "A basic test of memset(3)");
86}
87
88ATF_TC_BODY(memset_basic, tc)
89{
90	char *buf, *ret;
91
92	buf = malloc(page);
93	ret = malloc(page);
94
95	ATF_REQUIRE(buf != NULL);
96	ATF_REQUIRE(ret != NULL);
97
98	fill(ret, page, 0);
99	memset(buf, 0, page);
100
101	ATF_REQUIRE(memcmp(ret, buf, page) == 0);
102
103	fill(ret, page, 'x');
104	memset(buf, 'x', page);
105
106	ATF_REQUIRE(memcmp(ret, buf, page) == 0);
107
108	free(buf);
109	free(ret);
110}
111
112ATF_TC(memset_nonzero);
113ATF_TC_HEAD(memset_nonzero, tc)
114{
115	atf_tc_set_md_var(tc, "descr", "Test memset(3) with non-zero params");
116}
117
118ATF_TC_BODY(memset_nonzero, tc)
119{
120	const size_t n = 0x7f;
121	char *buf;
122	size_t i;
123
124	buf = malloc(page);
125	ATF_REQUIRE(buf != NULL);
126
127	for (i = 0x21; i < n; i++) {
128
129		(void)memset(buf, i, page);
130
131		if (check(buf, page, i) != true)
132			atf_tc_fail("memset(3) did not fill properly");
133	}
134
135	free(buf);
136}
137
138ATF_TC(memset_zero_size);
139
140ATF_TC_HEAD(memset_zero_size, tc)
141{
142	atf_tc_set_md_var(tc, "descr", "Test memset(3) with zero size");
143}
144
145ATF_TC_BODY(memset_zero_size, tc)
146{
147	char buf[1024];
148
149	(void)memset(buf, 'x', sizeof(buf));
150
151	if (check(buf, sizeof(buf), 'x') != true)
152		atf_tc_fail("memset(3) did not fill a static buffer");
153
154	(void)memset(buf+sizeof(buf)/2, 0, zero);
155
156	if (check(buf, sizeof(buf), 'x') != true)
157		atf_tc_fail("memset(3) with 0 size did change the buffer");
158}
159
160ATF_TC(bzero_zero_size);
161
162ATF_TC_HEAD(bzero_zero_size, tc)
163{
164	atf_tc_set_md_var(tc, "descr", "Test bzero(3) with zero size");
165}
166
167ATF_TC_BODY(bzero_zero_size, tc)
168{
169	char buf[1024];
170
171	(void)memset(buf, 'x', sizeof(buf));
172
173	if (check(buf, sizeof(buf), 'x') != true)
174		atf_tc_fail("memset(3) did not fill a static buffer");
175
176	(void)bzero(buf+sizeof(buf)/2, zero);
177
178	if (check(buf, sizeof(buf), 'x') != true)
179		atf_tc_fail("bzero(3) with 0 size did change the buffer");
180}
181
182ATF_TC(memset_struct);
183ATF_TC_HEAD(memset_struct, tc)
184{
185	atf_tc_set_md_var(tc, "descr", "Test memset(3) with a structure");
186}
187
188ATF_TC_BODY(memset_struct, tc)
189{
190	struct stat st;
191
192	st.st_dev = 0;
193	st.st_ino = 1;
194	st.st_mode = 2;
195	st.st_nlink = 3;
196	st.st_uid = 4;
197	st.st_gid = 5;
198	st.st_rdev = 6;
199	st.st_size = 7;
200	st.st_atime = 8;
201	st.st_mtime = 9;
202
203	(void)memset(&st, 0, sizeof(struct stat));
204
205	ATF_CHECK(st.st_dev == 0);
206	ATF_CHECK(st.st_ino == 0);
207	ATF_CHECK(st.st_mode == 0);
208	ATF_CHECK(st.st_nlink == 0);
209	ATF_CHECK(st.st_uid == 0);
210	ATF_CHECK(st.st_gid == 0);
211	ATF_CHECK(st.st_rdev == 0);
212	ATF_CHECK(st.st_size == 0);
213	ATF_CHECK(st.st_atime == 0);
214	ATF_CHECK(st.st_mtime == 0);
215}
216
217static void
218fill(char *buf, size_t len, char x)
219{
220	size_t i;
221
222	for (i = 0; i < len; i++)
223		buf[i] = x;
224}
225
226static bool
227check(char *buf, size_t len, char x)
228{
229	size_t i;
230
231	for (i = 0; i < len; i++) {
232
233		if (buf[i] != x)
234			return false;
235	}
236
237	return true;
238}
239
240ATF_TP_ADD_TCS(tp)
241{
242
243	page = sysconf(_SC_PAGESIZE);
244	ATF_REQUIRE(page >= 0);
245
246	ATF_TP_ADD_TC(tp, memset_array);
247	ATF_TP_ADD_TC(tp, memset_basic);
248	ATF_TP_ADD_TC(tp, memset_nonzero);
249	ATF_TP_ADD_TC(tp, memset_struct);
250	ATF_TP_ADD_TC(tp, memset_return);
251	ATF_TP_ADD_TC(tp, memset_zero_size);
252	ATF_TP_ADD_TC(tp, bzero_zero_size);
253
254	return atf_no_error();
255}
256