1 /* Test and measure strcpy functions.
2 Copyright (C) 1999-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifdef WIDE
20 # include <wchar.h>
21 # define CHAR wchar_t
22 # define UCHAR wchar_t
23 # define sfmt "ls"
24 # define BIG_CHAR WCHAR_MAX
25 # define SMALL_CHAR 1273
26 # define STRCMP wcscmp
27 # define MEMCMP wmemcmp
28 # define MEMSET wmemset
29 #else
30 # define CHAR char
31 # define UCHAR unsigned char
32 # define sfmt "s"
33 # define BIG_CHAR CHAR_MAX
34 # define SMALL_CHAR 127
35 # define STRCMP strcmp
36 # define MEMCMP memcmp
37 # define MEMSET memset
38 #endif
39
40 #ifndef STRCPY_RESULT
41 # define STRCPY_RESULT(dst, len) dst
42 # define TEST_MAIN
43 # ifndef WIDE
44 # define TEST_NAME "strcpy"
45 # else
46 # define TEST_NAME "wcscpy"
47 # endif
48 # include "test-string.h"
49 # ifndef WIDE
50 # define SIMPLE_STRCPY simple_strcpy
51 # define STRCPY strcpy
52 # else
53 # define SIMPLE_STRCPY simple_wcscpy
54 # define STRCPY wcscpy
55 # endif
56
57 CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);
58
59 IMPL (SIMPLE_STRCPY, 0)
60 IMPL (STRCPY, 1)
61
62 CHAR *
SIMPLE_STRCPY(CHAR * dst,const CHAR * src)63 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
64 {
65 CHAR *ret = dst;
66 while ((*dst++ = *src++) != '\0');
67 return ret;
68 }
69 #endif
70
71 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
72
73 static void
do_one_test(impl_t * impl,CHAR * dst,const CHAR * src,size_t len)74 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
75 size_t len __attribute__((unused)))
76 {
77 if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
78 {
79 error (0, 0, "Wrong result in function %s %p %p", impl->name,
80 CALL (impl, dst, src), STRCPY_RESULT (dst, len));
81 ret = 1;
82 return;
83 }
84
85 if (STRCMP (dst, src) != 0)
86 {
87 error (0, 0,
88 "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
89 impl->name, dst, src);
90 ret = 1;
91 return;
92 }
93 }
94
95 static void
do_test(size_t align1,size_t align2,size_t len,int max_char)96 do_test (size_t align1, size_t align2, size_t len, int max_char)
97 {
98 size_t i;
99 CHAR *s1, *s2;
100 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
101 but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
102 len for wcschr here isn't in bytes but it's number of wchar_t symbols. */
103 align1 &= 7;
104 if ((align1 + len) * sizeof (CHAR) >= page_size)
105 return;
106
107 align2 &= 7;
108 if ((align2 + len) * sizeof (CHAR) >= page_size)
109 return;
110
111 s1 = (CHAR *) (buf1) + align1;
112 s2 = (CHAR *) (buf2) + align2;
113
114 for (i = 0; i < len; i++)
115 s1[i] = 32 + 23 * i % (max_char - 32);
116 s1[len] = 0;
117
118 FOR_EACH_IMPL (impl, 0)
119 do_one_test (impl, s2, s1, len);
120 }
121
122 static void
do_random_tests(void)123 do_random_tests (void)
124 {
125 size_t i, j, n, align1, align2, len;
126 UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
127 UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
128 UCHAR *res;
129
130 for (n = 0; n < ITERATIONS; n++)
131 {
132 /* For wcsrchr: align1 and align2 here mean align not in bytes,
133 but in wchar_ts, in bytes it will equal to align * (sizeof
134 (wchar_t)). For strrchr we need to check all alignments from
135 0 to 63 since some assembly implementations have separate
136 prolog for alignments more 48. */
137
138 align1 = random () & (63 / sizeof (CHAR));
139 if (random () & 1)
140 align2 = random () & (63 / sizeof (CHAR));
141 else
142 align2 = align1 + (random () & 24);
143 len = random () & 511;
144 j = align1;
145 if (align2 > j)
146 j = align2;
147 if (len + j >= 511)
148 len = 510 - j - (random () & 7);
149 j = len + align1 + 64;
150 if (j > 512)
151 j = 512;
152 for (i = 0; i < j; i++)
153 {
154 if (i == len + align1)
155 p1[i] = 0;
156 else
157 {
158 p1[i] = random () & BIG_CHAR;
159 if (i >= align1 && i < len + align1 && !p1[i])
160 p1[i] = (random () & SMALL_CHAR) + 3;
161 }
162 }
163
164 FOR_EACH_IMPL (impl, 1)
165 {
166 MEMSET (p2 - 64, '\1', 512 + 64);
167 res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
168 if (res != STRCPY_RESULT (p2 + align2, len))
169 {
170 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
171 n, impl->name, align1, align2, len, res,
172 STRCPY_RESULT (p2 + align2, len));
173 ret = 1;
174 }
175 for (j = 0; j < align2 + 64; ++j)
176 {
177 if (p2[j - 64] != '\1')
178 {
179 error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
180 n, impl->name, align1, align2, len);
181 ret = 1;
182 break;
183 }
184 }
185 for (j = align2 + len + 1; j < 512; ++j)
186 {
187 if (p2[j] != '\1')
188 {
189 error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
190 n, impl->name, align1, align2, len);
191 ret = 1;
192 break;
193 }
194 }
195 if (MEMCMP (p1 + align1, p2 + align2, len + 1))
196 {
197 error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
198 n, impl->name, align1, align2, len);
199 ret = 1;
200 }
201 }
202 }
203 }
204
205 int
test_main(void)206 test_main (void)
207 {
208 size_t i;
209
210 test_init ();
211
212 printf ("%23s", "");
213 FOR_EACH_IMPL (impl, 0)
214 printf ("\t%s", impl->name);
215 putchar ('\n');
216
217 for (i = 0; i < 16; ++i)
218 {
219 do_test (0, 0, i, SMALL_CHAR);
220 do_test (0, 0, i, BIG_CHAR);
221 do_test (0, i, i, SMALL_CHAR);
222 do_test (i, 0, i, BIG_CHAR);
223 }
224
225 for (i = 1; i < 8; ++i)
226 {
227 do_test (0, 0, 8 << i, SMALL_CHAR);
228 do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
229 }
230
231 for (i = 1; i < 8; ++i)
232 {
233 do_test (i, 2 * i, 8 << i, SMALL_CHAR);
234 do_test (2 * i, i, 8 << i, BIG_CHAR);
235 do_test (i, i, 8 << i, SMALL_CHAR);
236 do_test (i, i, 8 << i, BIG_CHAR);
237 }
238
239 do_random_tests ();
240 return ret;
241 }
242
243 #include <support/test-driver.c>
244