1 /* $NetBSD: sem.c,v 1.11 2017/01/13 21:30:42 christos Exp $ */
4 * Common code for semaphore tests. This can be included both into
5 * programs using librt and libpthread.
10 #include <rump/rump.h>
11 #include <rump/rump_syscalls.h>
17 #include <semaphore.h>
27 ATF_TC_HEAD(postwait, tc)
30 atf_tc_set_md_var(tc, "descr", "tests post and wait from a "
31 "single thread (%s)", LIBNAME);
34 ATF_TC_BODY(postwait, tc)
41 ATF_REQUIRE_EQ(sem_init(&sem, 1, 0), 0);
48 rv = sem_trywait(&sem);
49 ATF_REQUIRE(errno == EAGAIN);
50 ATF_REQUIRE(rv == -1);
54 ATF_TC_HEAD(initvalue, tc)
57 atf_tc_set_md_var(tc, "descr", "tests initialization with a non-zero "
58 "value (%s)", LIBNAME);
61 ATF_TC_BODY(initvalue, tc)
68 ATF_REQUIRE_EQ(sem_trywait(&sem), 0);
69 ATF_REQUIRE_EQ(sem_trywait(&sem), 0);
70 ATF_REQUIRE_EQ(sem_trywait(&sem), 0);
71 ATF_REQUIRE_EQ(sem_trywait(&sem), 0);
72 ATF_REQUIRE_EQ(sem_trywait(&sem), -1);
76 ATF_TC_HEAD(destroy, tc)
79 atf_tc_set_md_var(tc, "descr", "tests sem_destroy works (%s)", LIBNAME);
82 ATF_TC_BODY(destroy, tc)
88 for (i = 0; i < 2; i++) {
91 ATF_REQUIRE_EQ(sem_trywait(&sem), 0);
92 ATF_REQUIRE_EQ(sem_trywait(&sem), -1);
93 ATF_REQUIRE_EQ(sem_destroy(&sem), 0);
94 rv = sem_trywait(&sem);
95 ATF_REQUIRE_EQ(errno, EINVAL);
96 ATF_REQUIRE_EQ(rv, -1);
101 ATF_TC_HEAD(busydestroy, tc)
104 atf_tc_set_md_var(tc, "descr", "tests sem_destroy report EBUSY for "
105 "a busy semaphore (%s)", LIBNAME);
111 sem_t *semmarit = arg;
114 sem_post(&semmarit[2]);
115 sem_wait(&semmarit[1]);
116 sem_wait(&semmarit[0]);
122 ATF_TC_BODY(busydestroy, tc)
128 /* use a unicpu rump kernel. this means less chance for race */
129 setenv("RUMP_NCPU", "1", 1);
132 sem_init(&semmarit[0], 1, 0);
133 sem_init(&semmarit[1], 1, 0);
134 sem_init(&semmarit[2], 1, 0);
136 pthread_create(&pt, NULL, hthread, semmarit);
139 * Make a best-effort to catch the other thread with its pants down.
140 * We can't do this for sure, can we? Although, we could reach
141 * inside the rump kernel and inquire about the thread's sleep
144 for (i = 0; i < 1000; i++) {
145 sem_wait(&semmarit[2]);
147 if (sem_destroy(&semmarit[1]) == -1)
152 * Didn't catch it? ok, recreate and post to make the
155 sem_init(&semmarit[1], 1, 0);
156 sem_post(&semmarit[0]);
157 sem_post(&semmarit[1]);
161 atf_tc_fail("sem destroy not reporting EBUSY");
164 pthread_join(pt, NULL);
168 ATF_TC_HEAD(blockwait, tc)
171 atf_tc_set_md_var(tc, "descr", "tests sem_wait can handle blocking "
173 atf_tc_set_md_var(tc, "timeout", "2");
176 ATF_TC_BODY(blockwait, tc)
183 sem_init(&semmarit[0], 1, 0);
184 sem_init(&semmarit[1], 1, 0);
185 sem_init(&semmarit[2], 1, 0);
187 pthread_create(&pt, NULL, hthread, semmarit);
190 * Make a best-effort. Unless we're extremely unlucky, we should
191 * at least one blocking wait.
193 for (i = 0; i < 10; i++) {
194 sem_wait(&semmarit[2]);
196 sem_post(&semmarit[0]);
197 sem_post(&semmarit[1]);
202 pthread_join(pt, NULL);
205 ATF_TC(blocktimedwait);
206 ATF_TC_HEAD(blocktimedwait, tc)
209 atf_tc_set_md_var(tc, "descr", "tests sem_timedwait can handle blocking"
211 atf_tc_set_md_var(tc, "timeout", "2");
214 ATF_TC_BODY(blocktimedwait, tc)
221 clock_gettime(CLOCK_REALTIME, &tp);
222 tp.tv_nsec += 50000000;
223 tp.tv_sec += tp.tv_nsec / 1000000000;
224 tp.tv_nsec %= 1000000000;
226 ATF_REQUIRE_EQ(sem_init(&semid, 1, 0), 0);
227 ATF_REQUIRE_ERRNO(ETIMEDOUT, sem_timedwait(&semid, &tp) == -1);
231 ATF_TC_HEAD(named, tc)
234 atf_tc_set_md_var(tc, "descr", "tests named semaphores (%s)", LIBNAME);
238 * Wow, easy naming rules. it's these times i'm really happy i can
239 * single-step into the kernel.
241 #define SEM1 "/precious_sem"
242 #define SEM2 "/justsem"
243 ATF_TC_BODY(named, tc)
249 sem1 = sem_open(SEM1, 0);
250 ATF_REQUIRE_EQ(errno, ENOENT);
251 ATF_REQUIRE_EQ(sem1, NULL);
253 sem1 = sem_open(SEM1, O_CREAT, 0444, 1);
255 atf_tc_fail_errno("sem_open O_CREAT");
257 rv = sem_open(SEM1, O_CREAT | O_EXCL);
258 ATF_REQUIRE_EQ(errno, EEXIST);
259 ATF_REQUIRE_EQ(rv, NULL);
261 sem2 = sem_open(SEM2, O_CREAT, 0444, 0);
263 atf_tc_fail_errno("sem_open O_CREAT");
265 /* check that semaphores are independent */
266 ATF_REQUIRE_EQ(sem_trywait(sem2), -1);
267 ATF_REQUIRE_EQ(sem_trywait(sem1), 0);
268 ATF_REQUIRE_EQ(sem_trywait(sem1), -1);
270 /* check that unlinked remains valid */
272 ATF_REQUIRE_EQ(sem_post(sem2), 0);
273 ATF_REQUIRE_EQ(sem_trywait(sem2), 0);
274 ATF_REQUIRE_EQ(sem_trywait(sem2), -1);
275 ATF_REQUIRE_EQ(errno, EAGAIN);
277 #if 0 /* see unlink */
278 /* close it and check that it's gone */
279 if (sem_close(sem2) != 0)
280 atf_tc_fail_errno("sem close");
281 ATF_REQUIRE_EQ(sem_trywait(sem2), -1);
282 ATF_REQUIRE_EQ(errno, EINVAL);
285 /* check that we still have sem1 */
287 ATF_REQUIRE_EQ(sem_trywait(sem1), 0);
288 ATF_REQUIRE_EQ(sem_trywait(sem1), -1);
289 ATF_REQUIRE_EQ(errno, EAGAIN);
293 ATF_TC_HEAD(unlink, tc)
296 /* this is currently broken. i'll append the PR number soon */
297 atf_tc_set_md_var(tc, "descr", "tests unlinked semaphores can be "
298 "closed (%s)", LIBNAME);
301 #define SEM "/thesem"
302 ATF_TC_BODY(unlink, tc)
307 sem = sem_open(SEM, O_CREAT, 0444, 0);
310 if (sem_unlink(SEM) == -1)
311 atf_tc_fail_errno("unlink");
312 if (sem_close(sem) == -1)
313 atf_tc_fail_errno("close unlinked semaphore");
316 /* use rump calls for libpthread _ksem_foo() calls */
317 #define F1(name, a) int _ksem_##name(a); \
318 int _ksem_##name(a v1) {return rump_sys__ksem_##name(v1);}
319 #define F2(name, a, b) int _ksem_##name(a, b); \
320 int _ksem_##name(a v1, b v2) {return rump_sys__ksem_##name(v1, v2);}
321 F2(init, unsigned int, intptr_t *);
323 F1(destroy, intptr_t);
325 F1(unlink, const char *);
326 F1(trywait, intptr_t);
328 F2(getvalue, intptr_t, unsigned int *);
329 F2(timedwait, intptr_t, const struct timespec *);
330 int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *);
331 int _ksem_open(const char *a, int b, mode_t c, unsigned int d, intptr_t *e)
332 {return rump_sys__ksem_open(a,b,c,d,e);}