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61dd6208 SP |
1 | /* Verify that pthread_[gs]etattr_default_np work correctly. |
2 | ||
688903eb | 3 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
61dd6208 SP |
4 | This file is part of the GNU C Library. |
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, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <pthread.h> | |
21 | #include <stdio.h> | |
22 | #include <stdint.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <stdbool.h> | |
27 | ||
28 | #define RETURN_IF_FAIL(f, ...) \ | |
29 | ({ \ | |
30 | int ret = f (__VA_ARGS__); \ | |
31 | if (ret != 0) \ | |
32 | { \ | |
33 | printf ("%s:%d: %s returned %d (errno = %d)\n", __FILE__, __LINE__, \ | |
34 | #f, ret, errno); \ | |
35 | return ret; \ | |
36 | } \ | |
37 | }) | |
38 | ||
39 | static int (*verify_result) (pthread_attr_t *); | |
40 | static size_t stacksize = 1024 * 1024; | |
41 | static size_t guardsize; | |
42 | static bool do_join = true; | |
43 | static int running = 0; | |
44 | static int detach_failed = 0; | |
45 | static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER; | |
46 | static pthread_cond_t c = PTHREAD_COND_INITIALIZER; | |
47 | ||
48 | static void * | |
49 | thr (void *unused __attribute__ ((unused))) | |
50 | { | |
51 | pthread_attr_t attr; | |
52 | int ret; | |
53 | ||
54 | memset (&attr, 0xab, sizeof attr); | |
55 | /* To verify that the pthread_setattr_default_np worked. */ | |
56 | if ((ret = pthread_getattr_default_np (&attr)) != 0) | |
57 | { | |
58 | printf ("pthread_getattr_default_np failed: %s\n", strerror (ret)); | |
59 | goto out; | |
60 | } | |
61 | ||
62 | if ((ret = (*verify_result) (&attr)) != 0) | |
63 | goto out; | |
64 | ||
65 | memset (&attr, 0xab, sizeof attr); | |
66 | /* To verify that the attributes actually got applied. */ | |
67 | if ((ret = pthread_getattr_np (pthread_self (), &attr)) != 0) | |
68 | { | |
69 | printf ("pthread_getattr_default_np failed: %s\n", strerror (ret)); | |
70 | goto out; | |
71 | } | |
72 | ||
73 | ret = (*verify_result) (&attr); | |
74 | ||
75 | out: | |
76 | if (!do_join) | |
77 | { | |
78 | pthread_mutex_lock (&m); | |
79 | running--; | |
80 | pthread_cond_signal (&c); | |
81 | pthread_mutex_unlock (&m); | |
82 | ||
83 | detach_failed |= ret; | |
84 | } | |
85 | ||
86 | return (void *) (uintptr_t) ret; | |
87 | } | |
88 | ||
89 | static int | |
90 | run_threads (const pthread_attr_t *attr) | |
91 | { | |
92 | pthread_t t; | |
93 | void *tret = NULL; | |
94 | ||
95 | RETURN_IF_FAIL (pthread_setattr_default_np, attr); | |
96 | ||
97 | /* Run twice to ensure that the attributes do not get overwritten in the | |
98 | first run somehow. */ | |
99 | for (int i = 0; i < 2; i++) | |
100 | { | |
101 | RETURN_IF_FAIL (pthread_create, &t, NULL, thr, NULL); | |
102 | if (do_join) | |
103 | RETURN_IF_FAIL (pthread_join, t, &tret); | |
104 | else | |
105 | { | |
106 | pthread_mutex_lock (&m); | |
107 | running++; | |
108 | pthread_mutex_unlock (&m); | |
109 | } | |
110 | ||
111 | if (tret != NULL) | |
112 | { | |
113 | puts ("Thread failed"); | |
114 | return 1; | |
115 | } | |
116 | } | |
117 | ||
118 | /* Stay in sync for detached threads and get their status. */ | |
119 | while (!do_join) | |
120 | { | |
121 | pthread_mutex_lock (&m); | |
122 | if (running == 0) | |
123 | { | |
124 | pthread_mutex_unlock (&m); | |
125 | break; | |
126 | } | |
127 | pthread_cond_wait (&c, &m); | |
128 | pthread_mutex_unlock (&m); | |
129 | } | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int | |
135 | verify_detach_result (pthread_attr_t *attr) | |
136 | { | |
137 | int state; | |
138 | ||
139 | RETURN_IF_FAIL (pthread_attr_getdetachstate, attr, &state); | |
140 | ||
141 | if (state != PTHREAD_CREATE_DETACHED) | |
142 | { | |
143 | puts ("failed to set detach state"); | |
144 | return 1; | |
145 | } | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static int | |
151 | do_detach_test (void) | |
152 | { | |
153 | pthread_attr_t attr; | |
154 | ||
155 | do_join = false; | |
156 | RETURN_IF_FAIL (pthread_attr_init, &attr); | |
157 | RETURN_IF_FAIL (pthread_attr_setdetachstate, &attr, PTHREAD_CREATE_DETACHED); | |
158 | ||
159 | RETURN_IF_FAIL (run_threads, &attr); | |
160 | return detach_failed; | |
161 | } | |
162 | ||
163 | static int | |
164 | verify_affinity_result (pthread_attr_t *attr) | |
165 | { | |
166 | cpu_set_t cpuset; | |
167 | ||
168 | RETURN_IF_FAIL (pthread_attr_getaffinity_np, attr, sizeof (cpuset), &cpuset); | |
169 | if (!CPU_ISSET (0, &cpuset)) | |
170 | { | |
171 | puts ("failed to set cpu affinity"); | |
172 | return 1; | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static int | |
179 | do_affinity_test (void) | |
180 | { | |
181 | pthread_attr_t attr; | |
182 | ||
183 | RETURN_IF_FAIL (pthread_attr_init, &attr); | |
184 | ||
185 | /* Processor affinity. Like scheduling policy, this could fail if the user | |
186 | does not have the necessary privileges. So we only spew a warning if | |
187 | pthread_create fails with EPERM. A computer has at least one CPU. */ | |
188 | cpu_set_t cpuset; | |
189 | CPU_ZERO (&cpuset); | |
190 | CPU_SET (0, &cpuset); | |
191 | RETURN_IF_FAIL (pthread_attr_setaffinity_np, &attr, sizeof (cpuset), &cpuset); | |
192 | ||
193 | int ret = run_threads (&attr); | |
194 | ||
195 | if (ret == EPERM) | |
196 | { | |
197 | printf ("Skipping CPU Affinity test: %s\n", strerror (ret)); | |
198 | return 0; | |
199 | } | |
200 | else if (ret != 0) | |
201 | return ret; | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int | |
207 | verify_sched_result (pthread_attr_t *attr) | |
208 | { | |
209 | int inherited, policy; | |
210 | struct sched_param param; | |
211 | ||
212 | RETURN_IF_FAIL (pthread_attr_getinheritsched, attr, &inherited); | |
213 | if (inherited != PTHREAD_EXPLICIT_SCHED) | |
214 | { | |
215 | puts ("failed to set EXPLICIT_SCHED (%d != %d)"); | |
216 | return 1; | |
217 | } | |
218 | ||
219 | RETURN_IF_FAIL (pthread_attr_getschedpolicy, attr, &policy); | |
220 | if (policy != SCHED_RR) | |
221 | { | |
222 | printf ("failed to set SCHED_RR (%d != %d)\n", policy, SCHED_RR); | |
223 | return 1; | |
224 | } | |
225 | ||
226 | RETURN_IF_FAIL (pthread_attr_getschedparam, attr, ¶m); | |
227 | if (param.sched_priority != 42) | |
228 | { | |
229 | printf ("failed to set sched_priority (%d != %d)\n", | |
230 | param.sched_priority, 42); | |
231 | return 1; | |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int | |
238 | do_sched_test (void) | |
239 | { | |
240 | pthread_attr_t attr; | |
241 | ||
242 | RETURN_IF_FAIL (pthread_attr_init, &attr); | |
243 | ||
244 | /* Scheduling policy. Note that we don't always test these since it's | |
245 | possible that the user the tests run as don't have the appropriate | |
246 | privileges. */ | |
247 | RETURN_IF_FAIL (pthread_attr_setinheritsched, &attr, PTHREAD_EXPLICIT_SCHED); | |
248 | RETURN_IF_FAIL (pthread_attr_setschedpolicy, &attr, SCHED_RR); | |
249 | ||
250 | struct sched_param param; | |
251 | param.sched_priority = 42; | |
252 | RETURN_IF_FAIL (pthread_attr_setschedparam, &attr, ¶m); | |
253 | ||
254 | int ret = run_threads (&attr); | |
255 | ||
256 | if (ret == EPERM) | |
257 | { | |
258 | printf ("Skipping Scheduler Attributes test: %s\n", strerror (ret)); | |
259 | return 0; | |
260 | } | |
261 | else if (ret != 0) | |
262 | return ret; | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static int | |
268 | verify_guardsize_result (pthread_attr_t *attr) | |
269 | { | |
270 | size_t guard; | |
271 | ||
272 | RETURN_IF_FAIL (pthread_attr_getguardsize, attr, &guard); | |
273 | ||
274 | if (guardsize != guard) | |
275 | { | |
276 | printf ("failed to set guardsize (%zu, %zu)\n", guardsize, guard); | |
277 | return 1; | |
278 | } | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int | |
284 | do_guardsize_test (void) | |
285 | { | |
286 | long int pagesize = sysconf (_SC_PAGESIZE); | |
287 | pthread_attr_t attr; | |
288 | ||
289 | if (pagesize < 0) | |
290 | { | |
291 | printf ("sysconf failed: %s\n", strerror (errno)); | |
292 | return 1; | |
293 | } | |
294 | ||
295 | RETURN_IF_FAIL (pthread_getattr_default_np, &attr); | |
296 | ||
297 | /* Increase default guardsize by a page. */ | |
298 | RETURN_IF_FAIL (pthread_attr_getguardsize, &attr, &guardsize); | |
299 | guardsize += pagesize; | |
300 | RETURN_IF_FAIL (pthread_attr_setguardsize, &attr, guardsize); | |
301 | RETURN_IF_FAIL (run_threads, &attr); | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static int | |
307 | verify_stacksize_result (pthread_attr_t *attr) | |
308 | { | |
309 | size_t stack; | |
310 | ||
311 | RETURN_IF_FAIL (pthread_attr_getstacksize, attr, &stack); | |
312 | ||
313 | if (stacksize != stack) | |
314 | { | |
315 | printf ("failed to set default stacksize (%zu, %zu)\n", stacksize, stack); | |
316 | return 1; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int | |
323 | do_stacksize_test (void) | |
324 | { | |
325 | long int pagesize = sysconf (_SC_PAGESIZE); | |
326 | pthread_attr_t attr; | |
327 | ||
328 | if (pagesize < 0) | |
329 | { | |
330 | printf ("sysconf failed: %s\n", strerror (errno)); | |
331 | return 1; | |
332 | } | |
333 | ||
334 | /* Perturb the size by a page so that we're not aligned on the 64K boundary. | |
335 | pthread_create does this perturbation on x86 to avoid causing the 64k | |
336 | aliasing conflict. We want to prevent pthread_create from doing that | |
337 | since it is not consistent for all architectures. */ | |
338 | stacksize += pagesize; | |
339 | ||
340 | RETURN_IF_FAIL (pthread_attr_init, &attr); | |
341 | ||
342 | /* Run twice to ensure that we don't give a false positive. */ | |
343 | RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize); | |
344 | RETURN_IF_FAIL (run_threads, &attr); | |
345 | stacksize *= 2; | |
346 | RETURN_IF_FAIL (pthread_attr_setstacksize, &attr, stacksize); | |
347 | RETURN_IF_FAIL (run_threads, &attr); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | /* We test each attribute separately because sched and affinity tests may need | |
352 | additional user privileges that may not be available during the test run. | |
353 | Each attribute test is a set of two functions, viz. a function to set the | |
354 | default attribute (do_foo_test) and another to verify its result | |
355 | (verify_foo_result). Each test spawns a thread and checks (1) if the | |
356 | attribute values were applied correctly and (2) if the change in the default | |
357 | value reflected. */ | |
358 | static int | |
359 | do_test (void) | |
360 | { | |
361 | puts ("stacksize test"); | |
362 | verify_result = verify_stacksize_result; | |
363 | RETURN_IF_FAIL (do_stacksize_test); | |
364 | ||
365 | puts ("guardsize test"); | |
366 | verify_result = verify_guardsize_result; | |
367 | RETURN_IF_FAIL (do_guardsize_test); | |
368 | ||
369 | puts ("sched test"); | |
370 | verify_result = verify_sched_result; | |
371 | RETURN_IF_FAIL (do_sched_test); | |
372 | ||
373 | puts ("affinity test"); | |
374 | verify_result = verify_affinity_result; | |
375 | RETURN_IF_FAIL (do_affinity_test); | |
376 | ||
377 | puts ("detach test"); | |
378 | verify_result = verify_detach_result; | |
379 | RETURN_IF_FAIL (do_detach_test); | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | #define TEST_FUNCTION do_test () | |
385 | #include "../test-skeleton.c" |