source: branches/libc-0.6/src/libctests/glibc/debug/test-strcpy_chk.c@ 2442

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1/* Test and measure __strcpy_chk functions.
2 Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Jakub Jelinek <[email protected]>, 1999.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21#ifndef STRCPY_RESULT
22# define STRCPY_RESULT(dst, len) dst
23# define TEST_MAIN
24# include "../string/test-string.h"
25
26extern void __attribute__ ((noreturn)) __chk_fail (void);
27char *simple_strcpy_chk (char *, const char *, size_t);
28extern char *normal_strcpy (char *, const char *, size_t)
29 __asm ("strcpy");
30extern char *__strcpy_chk (char *, const char *, size_t);
31
32IMPL (simple_strcpy_chk, 0)
33IMPL (normal_strcpy, 1)
34IMPL (__strcpy_chk, 2)
35
36char *
37simple_strcpy_chk (char *dst, const char *src, size_t len)
38{
39 char *ret = dst;
40 if (! len)
41 __chk_fail ();
42 while ((*dst++ = *src++) != '\0')
43 if (--len == 0)
44 __chk_fail ();
45 return ret;
46}
47#endif
48
49#include <fcntl.h>
50#include <paths.h>
51#include <setjmp.h>
52#include <signal.h>
53
54volatile int chk_fail_ok;
55jmp_buf chk_fail_buf;
56
57static void
58handler (int sig)
59{
60 if (chk_fail_ok)
61 {
62 chk_fail_ok = 0;
63 longjmp (chk_fail_buf, 1);
64 }
65 else
66 _exit (127);
67}
68
69typedef char *(*proto_t) (char *, const char *, size_t);
70
71static void
72do_one_test (impl_t *impl, char *dst, const char *src,
73 size_t len, size_t dlen)
74{
75 char *res;
76 if (dlen <= len)
77 {
78 if (impl->test == 1)
79 return;
80
81 chk_fail_ok = 1;
82 if (setjmp (chk_fail_buf) == 0)
83 {
84 res = CALL (impl, dst, src, dlen);
85 printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
86 impl->name, len, dlen);
87 chk_fail_ok = 0;
88 ret = 1;
89 }
90 return;
91 }
92 else
93 res = CALL (impl, dst, src, dlen);
94
95 if (res != STRCPY_RESULT (dst, len))
96 {
97 printf ("Wrong result in function %s %p %p\n", impl->name,
98 res, STRCPY_RESULT (dst, len));
99 ret = 1;
100 return;
101 }
102
103 if (strcmp (dst, src) != 0)
104 {
105 printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
106 impl->name, dst, src);
107 ret = 1;
108 return;
109 }
110
111 if (HP_TIMING_AVAIL)
112 {
113 hp_timing_t start __attribute ((unused));
114 hp_timing_t stop __attribute ((unused));;
115 hp_timing_t best_time = ~ (hp_timing_t) 0;
116 size_t i;
117
118 for (i = 0; i < 32; ++i)
119 {
120 HP_TIMING_NOW (start);
121 CALL (impl, dst, src, dlen);
122 HP_TIMING_NOW (stop);
123 HP_TIMING_BEST (best_time, start, stop);
124 }
125
126 printf ("\t%zd", (size_t) best_time);
127 }
128}
129
130static void
131do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
132{
133 size_t i;
134 char *s1, *s2;
135
136 align1 &= 7;
137 if (align1 + len >= page_size)
138 return;
139
140 align2 &= 7;
141 if (align2 + len >= page_size)
142 return;
143
144 s1 = buf1 + align1;
145 s2 = buf2 + align2;
146
147 for (i = 0; i < len; i++)
148 s1[i] = 32 + 23 * i % (max_char - 32);
149 s1[len] = 0;
150
151 if (HP_TIMING_AVAIL && dlen > len)
152 printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
153
154 FOR_EACH_IMPL (impl, 0)
155 do_one_test (impl, s2, s1, len, dlen);
156
157 if (HP_TIMING_AVAIL && dlen > len)
158 putchar ('\n');
159}
160
161static void
162do_random_tests (void)
163{
164 size_t i, j, n, align1, align2, len, dlen;
165 unsigned char *p1 = buf1 + page_size - 512;
166 unsigned char *p2 = buf2 + page_size - 512;
167 unsigned char *res;
168
169 for (n = 0; n < ITERATIONS; n++)
170 {
171 align1 = random () & 31;
172 if (random () & 1)
173 align2 = random () & 31;
174 else
175 align2 = align1 + (random () & 24);
176 len = random () & 511;
177 j = align1;
178 if (align2 > j)
179 j = align2;
180 if (len + j >= 511)
181 len = 510 - j - (random () & 7);
182 j = len + align1 + 64;
183 if (j > 512)
184 j = 512;
185 for (i = 0; i < j; i++)
186 {
187 if (i == len + align1)
188 p1[i] = 0;
189 else
190 {
191 p1[i] = random () & 255;
192 if (i >= align1 && i < len + align1 && !p1[i])
193 p1[i] = (random () & 127) + 3;
194 }
195 }
196
197 switch (random () & 7)
198 {
199 case 0:
200 dlen = len - (random () & 31);
201 if (dlen > len)
202 dlen = len;
203 break;
204 case 1:
205 dlen = (size_t) -1;
206 break;
207 case 2:
208 dlen = len + 1 + (random () & 65535);
209 break;
210 case 3:
211 dlen = len + 1 + (random () & 255);
212 break;
213 case 4:
214 dlen = len + 1 + (random () & 31);
215 break;
216 case 5:
217 dlen = len + 1 + (random () & 7);
218 break;
219 case 6:
220 dlen = len + 1 + (random () & 3);
221 break;
222 default:
223 dlen = len + 1;
224 break;
225 }
226
227 FOR_EACH_IMPL (impl, 1)
228 {
229 if (dlen <= len)
230 {
231 if (impl->test != 1)
232 {
233 chk_fail_ok = 1;
234 if (setjmp (chk_fail_buf) == 0)
235 {
236 res = CALL (impl, p2 + align2, p1 + align1, dlen);
237 printf ("Iteration %zd - did not __chk_fail\n", n);
238 chk_fail_ok = 0;
239 ret = 1;
240 }
241 }
242 continue;
243 }
244 memset (p2 - 64, '\1', 512 + 64);
245 res = CALL (impl, p2 + align2, p1 + align1, dlen);
246 if (res != STRCPY_RESULT (p2 + align2, len))
247 {
248 printf ("\
249Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
250 n, impl->name, align1, align2, len, res,
251 STRCPY_RESULT (p2 + align2, len));
252 ret = 1;
253 }
254 for (j = 0; j < align2 + 64; ++j)
255 {
256 if (p2[j - 64] != '\1')
257 {
258 printf ("\
259Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
260 n, impl->name, align1, align2, len);
261 ret = 1;
262 break;
263 }
264 }
265 for (j = align2 + len + 1; j < 512; ++j)
266 {
267 if (p2[j] != '\1')
268 {
269 printf ("\
270Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
271 n, impl->name, align1, align2, len);
272 ret = 1;
273 break;
274 }
275 }
276 if (memcmp (p1 + align1, p2 + align2, len + 1))
277 {
278 printf ("\
279Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
280 n, impl->name, align1, align2, len);
281 ret = 1;
282 }
283 }
284 }
285}
286
287int
288test_main (void)
289{
290 size_t i;
291
292 struct sigaction sa;
293 sa.sa_handler = handler;
294 sa.sa_flags = 0;
295 sigemptyset (&sa.sa_mask);
296
297 sigaction (SIGABRT, &sa, NULL);
298
299 /* Avoid all the buffer overflow messages on stderr. */
300 int fd = open (_PATH_DEVNULL, O_WRONLY);
301 if (fd == -1)
302 close (STDERR_FILENO);
303 else
304 {
305 dup2 (fd, STDERR_FILENO);
306 close (fd);
307 }
308 setenv ("LIBC_FATAL_STDERR_", "1", 1);
309
310 test_init ();
311
312 printf ("%23s", "");
313 FOR_EACH_IMPL (impl, 0)
314 printf ("\t%s", impl->name);
315 putchar ('\n');
316
317 for (i = 0; i < 16; ++i)
318 {
319 do_test (0, 0, i, i + 1, 127);
320 do_test (0, 0, i, i + 1, 255);
321 do_test (0, i, i, i + 1, 127);
322 do_test (i, 0, i, i + 1, 255);
323 }
324
325 for (i = 1; i < 8; ++i)
326 {
327 do_test (0, 0, 8 << i, (8 << i) + 1, 127);
328 do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
329 }
330
331 for (i = 1; i < 8; ++i)
332 {
333 do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
334 do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
335 do_test (i, i, (8 << i), (8 << i) + 1, 127);
336 do_test (i, i, (8 << i), (8 << i) + 1, 255);
337 }
338
339 for (i = 0; i < 16; ++i)
340 {
341 do_test (0, 0, i, i + 256, 127);
342 do_test (0, 0, i, i + 256, 255);
343 do_test (0, i, i, i + 256, 127);
344 do_test (i, 0, i, i + 256, 255);
345 }
346
347 for (i = 1; i < 8; ++i)
348 {
349 do_test (0, 0, 8 << i, (8 << i) + 256, 127);
350 do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
351 }
352
353 for (i = 1; i < 8; ++i)
354 {
355 do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
356 do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
357 do_test (i, i, (8 << i), (8 << i) + 256, 127);
358 do_test (i, i, (8 << i), (8 << i) + 256, 255);
359 }
360
361 for (i = 0; i < 16; ++i)
362 {
363 do_test (0, 0, i, i, 127);
364 do_test (0, 0, i, i + 2, 255);
365 do_test (0, i, i, i + 3, 127);
366 do_test (i, 0, i, i + 4, 255);
367 }
368
369 for (i = 1; i < 8; ++i)
370 {
371 do_test (0, 0, 8 << i, (8 << i) - 15, 127);
372 do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
373 }
374
375 for (i = 1; i < 8; ++i)
376 {
377 do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
378 do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
379 do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
380 do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
381 }
382
383 do_random_tests ();
384 return ret;
385}
386
387#include "../test-skeleton.c"
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