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Commit | Line | Data |
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e5d355d1 AL |
1 | /* |
2 | * Wrappers around mutex/cond/thread functions | |
3 | * | |
4 | * Copyright Red Hat, Inc. 2009 | |
5 | * | |
6 | * Author: | |
7 | * Marcelo Tosatti <mtosatti@redhat.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
aafd7584 | 13 | #include "qemu/osdep.h" |
1de7afc9 | 14 | #include "qemu/thread.h" |
c7c4d063 | 15 | #include "qemu/atomic.h" |
ef57137f | 16 | #include "qemu/notify.h" |
f1aff7aa | 17 | #include "qemu-thread-common.h" |
ce9f0e5b | 18 | #include "qemu/tsan.h" |
e5d355d1 | 19 | |
8f480de0 DDAG |
20 | static bool name_threads; |
21 | ||
22 | void qemu_thread_naming(bool enable) | |
23 | { | |
24 | name_threads = enable; | |
5c312079 DDAG |
25 | |
26 | #ifndef CONFIG_THREAD_SETNAME_BYTHREAD | |
27 | /* This is a debugging option, not fatal */ | |
28 | if (enable) { | |
29 | fprintf(stderr, "qemu: thread naming not supported on this host\n"); | |
30 | } | |
31 | #endif | |
8f480de0 DDAG |
32 | } |
33 | ||
e5d355d1 AL |
34 | static void error_exit(int err, const char *msg) |
35 | { | |
36 | fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err)); | |
53380ac3 | 37 | abort(); |
e5d355d1 AL |
38 | } |
39 | ||
3dcc9c6e YK |
40 | static void compute_abs_deadline(struct timespec *ts, int ms) |
41 | { | |
42 | struct timeval tv; | |
43 | gettimeofday(&tv, NULL); | |
44 | ts->tv_nsec = tv.tv_usec * 1000 + (ms % 1000) * 1000000; | |
45 | ts->tv_sec = tv.tv_sec + ms / 1000; | |
46 | if (ts->tv_nsec >= 1000000000) { | |
47 | ts->tv_sec++; | |
48 | ts->tv_nsec -= 1000000000; | |
49 | } | |
50 | } | |
51 | ||
e5d355d1 AL |
52 | void qemu_mutex_init(QemuMutex *mutex) |
53 | { | |
54 | int err; | |
55 | ||
24fa9049 | 56 | err = pthread_mutex_init(&mutex->lock, NULL); |
e5d355d1 AL |
57 | if (err) |
58 | error_exit(err, __func__); | |
f1aff7aa | 59 | qemu_mutex_post_init(mutex); |
e5d355d1 AL |
60 | } |
61 | ||
313b1d69 CC |
62 | void qemu_mutex_destroy(QemuMutex *mutex) |
63 | { | |
64 | int err; | |
65 | ||
c096358e FZ |
66 | assert(mutex->initialized); |
67 | mutex->initialized = false; | |
313b1d69 CC |
68 | err = pthread_mutex_destroy(&mutex->lock); |
69 | if (err) | |
70 | error_exit(err, __func__); | |
71 | } | |
72 | ||
6c27a0de | 73 | void qemu_mutex_lock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
74 | { |
75 | int err; | |
76 | ||
c096358e | 77 | assert(mutex->initialized); |
f1aff7aa | 78 | qemu_mutex_pre_lock(mutex, file, line); |
e5d355d1 AL |
79 | err = pthread_mutex_lock(&mutex->lock); |
80 | if (err) | |
81 | error_exit(err, __func__); | |
f1aff7aa | 82 | qemu_mutex_post_lock(mutex, file, line); |
e5d355d1 AL |
83 | } |
84 | ||
6c27a0de | 85 | int qemu_mutex_trylock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 | 86 | { |
31f5a726 JRZ |
87 | int err; |
88 | ||
c096358e | 89 | assert(mutex->initialized); |
31f5a726 JRZ |
90 | err = pthread_mutex_trylock(&mutex->lock); |
91 | if (err == 0) { | |
f1aff7aa | 92 | qemu_mutex_post_lock(mutex, file, line); |
31f5a726 JRZ |
93 | return 0; |
94 | } | |
95 | if (err != EBUSY) { | |
96 | error_exit(err, __func__); | |
97 | } | |
98 | return -EBUSY; | |
e5d355d1 AL |
99 | } |
100 | ||
6c27a0de | 101 | void qemu_mutex_unlock_impl(QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
102 | { |
103 | int err; | |
104 | ||
c096358e | 105 | assert(mutex->initialized); |
f1aff7aa | 106 | qemu_mutex_pre_unlock(mutex, file, line); |
e5d355d1 AL |
107 | err = pthread_mutex_unlock(&mutex->lock); |
108 | if (err) | |
109 | error_exit(err, __func__); | |
110 | } | |
111 | ||
feadec63 PB |
112 | void qemu_rec_mutex_init(QemuRecMutex *mutex) |
113 | { | |
114 | int err; | |
115 | pthread_mutexattr_t attr; | |
116 | ||
117 | pthread_mutexattr_init(&attr); | |
118 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | |
119 | err = pthread_mutex_init(&mutex->lock, &attr); | |
120 | pthread_mutexattr_destroy(&attr); | |
121 | if (err) { | |
122 | error_exit(err, __func__); | |
123 | } | |
c096358e | 124 | mutex->initialized = true; |
feadec63 PB |
125 | } |
126 | ||
e5d355d1 AL |
127 | void qemu_cond_init(QemuCond *cond) |
128 | { | |
129 | int err; | |
130 | ||
131 | err = pthread_cond_init(&cond->cond, NULL); | |
132 | if (err) | |
133 | error_exit(err, __func__); | |
c096358e | 134 | cond->initialized = true; |
e5d355d1 AL |
135 | } |
136 | ||
313b1d69 CC |
137 | void qemu_cond_destroy(QemuCond *cond) |
138 | { | |
139 | int err; | |
140 | ||
c096358e FZ |
141 | assert(cond->initialized); |
142 | cond->initialized = false; | |
313b1d69 CC |
143 | err = pthread_cond_destroy(&cond->cond); |
144 | if (err) | |
145 | error_exit(err, __func__); | |
146 | } | |
147 | ||
e5d355d1 AL |
148 | void qemu_cond_signal(QemuCond *cond) |
149 | { | |
150 | int err; | |
151 | ||
c096358e | 152 | assert(cond->initialized); |
e5d355d1 AL |
153 | err = pthread_cond_signal(&cond->cond); |
154 | if (err) | |
155 | error_exit(err, __func__); | |
156 | } | |
157 | ||
158 | void qemu_cond_broadcast(QemuCond *cond) | |
159 | { | |
160 | int err; | |
161 | ||
c096358e | 162 | assert(cond->initialized); |
e5d355d1 AL |
163 | err = pthread_cond_broadcast(&cond->cond); |
164 | if (err) | |
165 | error_exit(err, __func__); | |
166 | } | |
167 | ||
6c27a0de | 168 | void qemu_cond_wait_impl(QemuCond *cond, QemuMutex *mutex, const char *file, const int line) |
e5d355d1 AL |
169 | { |
170 | int err; | |
171 | ||
c096358e | 172 | assert(cond->initialized); |
f1aff7aa | 173 | qemu_mutex_pre_unlock(mutex, file, line); |
e5d355d1 | 174 | err = pthread_cond_wait(&cond->cond, &mutex->lock); |
f1aff7aa | 175 | qemu_mutex_post_lock(mutex, file, line); |
e5d355d1 AL |
176 | if (err) |
177 | error_exit(err, __func__); | |
178 | } | |
179 | ||
3dcc9c6e YK |
180 | bool qemu_cond_timedwait_impl(QemuCond *cond, QemuMutex *mutex, int ms, |
181 | const char *file, const int line) | |
182 | { | |
183 | int err; | |
184 | struct timespec ts; | |
185 | ||
186 | assert(cond->initialized); | |
187 | trace_qemu_mutex_unlock(mutex, file, line); | |
188 | compute_abs_deadline(&ts, ms); | |
189 | err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts); | |
190 | trace_qemu_mutex_locked(mutex, file, line); | |
191 | if (err && err != ETIMEDOUT) { | |
192 | error_exit(err, __func__); | |
193 | } | |
194 | return err != ETIMEDOUT; | |
195 | } | |
196 | ||
38b14db3 PB |
197 | void qemu_sem_init(QemuSemaphore *sem, int init) |
198 | { | |
199 | int rc; | |
200 | ||
401bc051 | 201 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 PB |
202 | rc = pthread_mutex_init(&sem->lock, NULL); |
203 | if (rc != 0) { | |
204 | error_exit(rc, __func__); | |
205 | } | |
206 | rc = pthread_cond_init(&sem->cond, NULL); | |
207 | if (rc != 0) { | |
208 | error_exit(rc, __func__); | |
209 | } | |
210 | if (init < 0) { | |
211 | error_exit(EINVAL, __func__); | |
212 | } | |
213 | sem->count = init; | |
214 | #else | |
38b14db3 PB |
215 | rc = sem_init(&sem->sem, 0, init); |
216 | if (rc < 0) { | |
217 | error_exit(errno, __func__); | |
218 | } | |
c166cb72 | 219 | #endif |
c096358e | 220 | sem->initialized = true; |
38b14db3 PB |
221 | } |
222 | ||
223 | void qemu_sem_destroy(QemuSemaphore *sem) | |
224 | { | |
225 | int rc; | |
226 | ||
c096358e FZ |
227 | assert(sem->initialized); |
228 | sem->initialized = false; | |
401bc051 | 229 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 PB |
230 | rc = pthread_cond_destroy(&sem->cond); |
231 | if (rc < 0) { | |
232 | error_exit(rc, __func__); | |
233 | } | |
234 | rc = pthread_mutex_destroy(&sem->lock); | |
235 | if (rc < 0) { | |
236 | error_exit(rc, __func__); | |
237 | } | |
238 | #else | |
38b14db3 PB |
239 | rc = sem_destroy(&sem->sem); |
240 | if (rc < 0) { | |
241 | error_exit(errno, __func__); | |
242 | } | |
c166cb72 | 243 | #endif |
38b14db3 PB |
244 | } |
245 | ||
246 | void qemu_sem_post(QemuSemaphore *sem) | |
247 | { | |
248 | int rc; | |
249 | ||
c096358e | 250 | assert(sem->initialized); |
401bc051 | 251 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 | 252 | pthread_mutex_lock(&sem->lock); |
79761c66 | 253 | if (sem->count == UINT_MAX) { |
c166cb72 | 254 | rc = EINVAL; |
c166cb72 | 255 | } else { |
79761c66 IT |
256 | sem->count++; |
257 | rc = pthread_cond_signal(&sem->cond); | |
c166cb72 PB |
258 | } |
259 | pthread_mutex_unlock(&sem->lock); | |
260 | if (rc != 0) { | |
261 | error_exit(rc, __func__); | |
262 | } | |
263 | #else | |
38b14db3 PB |
264 | rc = sem_post(&sem->sem); |
265 | if (rc < 0) { | |
266 | error_exit(errno, __func__); | |
267 | } | |
c166cb72 PB |
268 | #endif |
269 | } | |
270 | ||
38b14db3 PB |
271 | int qemu_sem_timedwait(QemuSemaphore *sem, int ms) |
272 | { | |
273 | int rc; | |
c166cb72 PB |
274 | struct timespec ts; |
275 | ||
c096358e | 276 | assert(sem->initialized); |
401bc051 | 277 | #ifndef CONFIG_SEM_TIMEDWAIT |
79761c66 | 278 | rc = 0; |
c166cb72 PB |
279 | compute_abs_deadline(&ts, ms); |
280 | pthread_mutex_lock(&sem->lock); | |
79761c66 | 281 | while (sem->count == 0) { |
c166cb72 PB |
282 | rc = pthread_cond_timedwait(&sem->cond, &sem->lock, &ts); |
283 | if (rc == ETIMEDOUT) { | |
284 | break; | |
285 | } | |
286 | if (rc != 0) { | |
287 | error_exit(rc, __func__); | |
288 | } | |
289 | } | |
79761c66 IT |
290 | if (rc != ETIMEDOUT) { |
291 | --sem->count; | |
292 | } | |
c166cb72 PB |
293 | pthread_mutex_unlock(&sem->lock); |
294 | return (rc == ETIMEDOUT ? -1 : 0); | |
295 | #else | |
38b14db3 PB |
296 | if (ms <= 0) { |
297 | /* This is cheaper than sem_timedwait. */ | |
298 | do { | |
299 | rc = sem_trywait(&sem->sem); | |
300 | } while (rc == -1 && errno == EINTR); | |
301 | if (rc == -1 && errno == EAGAIN) { | |
302 | return -1; | |
303 | } | |
304 | } else { | |
c166cb72 | 305 | compute_abs_deadline(&ts, ms); |
38b14db3 PB |
306 | do { |
307 | rc = sem_timedwait(&sem->sem, &ts); | |
308 | } while (rc == -1 && errno == EINTR); | |
309 | if (rc == -1 && errno == ETIMEDOUT) { | |
310 | return -1; | |
311 | } | |
312 | } | |
313 | if (rc < 0) { | |
314 | error_exit(errno, __func__); | |
315 | } | |
316 | return 0; | |
c166cb72 | 317 | #endif |
38b14db3 PB |
318 | } |
319 | ||
320 | void qemu_sem_wait(QemuSemaphore *sem) | |
321 | { | |
79761c66 IT |
322 | int rc; |
323 | ||
c096358e | 324 | assert(sem->initialized); |
401bc051 | 325 | #ifndef CONFIG_SEM_TIMEDWAIT |
c166cb72 | 326 | pthread_mutex_lock(&sem->lock); |
79761c66 IT |
327 | while (sem->count == 0) { |
328 | rc = pthread_cond_wait(&sem->cond, &sem->lock); | |
329 | if (rc != 0) { | |
330 | error_exit(rc, __func__); | |
331 | } | |
c166cb72 | 332 | } |
79761c66 | 333 | --sem->count; |
c166cb72 PB |
334 | pthread_mutex_unlock(&sem->lock); |
335 | #else | |
38b14db3 PB |
336 | do { |
337 | rc = sem_wait(&sem->sem); | |
338 | } while (rc == -1 && errno == EINTR); | |
339 | if (rc < 0) { | |
340 | error_exit(errno, __func__); | |
341 | } | |
c166cb72 | 342 | #endif |
38b14db3 PB |
343 | } |
344 | ||
c7c4d063 | 345 | #ifdef __linux__ |
fbcc3e50 | 346 | #include "qemu/futex.h" |
c7c4d063 | 347 | #else |
fbcc3e50 | 348 | static inline void qemu_futex_wake(QemuEvent *ev, int n) |
c7c4d063 | 349 | { |
c096358e | 350 | assert(ev->initialized); |
158ef8cb | 351 | pthread_mutex_lock(&ev->lock); |
c7c4d063 PB |
352 | if (n == 1) { |
353 | pthread_cond_signal(&ev->cond); | |
354 | } else { | |
355 | pthread_cond_broadcast(&ev->cond); | |
356 | } | |
158ef8cb | 357 | pthread_mutex_unlock(&ev->lock); |
c7c4d063 PB |
358 | } |
359 | ||
fbcc3e50 | 360 | static inline void qemu_futex_wait(QemuEvent *ev, unsigned val) |
c7c4d063 | 361 | { |
c096358e | 362 | assert(ev->initialized); |
c7c4d063 PB |
363 | pthread_mutex_lock(&ev->lock); |
364 | if (ev->value == val) { | |
365 | pthread_cond_wait(&ev->cond, &ev->lock); | |
366 | } | |
367 | pthread_mutex_unlock(&ev->lock); | |
368 | } | |
369 | #endif | |
370 | ||
371 | /* Valid transitions: | |
372 | * - free->set, when setting the event | |
fbcc3e50 | 373 | * - busy->set, when setting the event, followed by qemu_futex_wake |
c7c4d063 PB |
374 | * - set->free, when resetting the event |
375 | * - free->busy, when waiting | |
376 | * | |
377 | * set->busy does not happen (it can be observed from the outside but | |
378 | * it really is set->free->busy). | |
379 | * | |
380 | * busy->free provably cannot happen; to enforce it, the set->free transition | |
381 | * is done with an OR, which becomes a no-op if the event has concurrently | |
382 | * transitioned to free or busy. | |
383 | */ | |
384 | ||
385 | #define EV_SET 0 | |
386 | #define EV_FREE 1 | |
387 | #define EV_BUSY -1 | |
388 | ||
389 | void qemu_event_init(QemuEvent *ev, bool init) | |
390 | { | |
391 | #ifndef __linux__ | |
392 | pthread_mutex_init(&ev->lock, NULL); | |
393 | pthread_cond_init(&ev->cond, NULL); | |
394 | #endif | |
395 | ||
396 | ev->value = (init ? EV_SET : EV_FREE); | |
c096358e | 397 | ev->initialized = true; |
c7c4d063 PB |
398 | } |
399 | ||
400 | void qemu_event_destroy(QemuEvent *ev) | |
401 | { | |
c096358e FZ |
402 | assert(ev->initialized); |
403 | ev->initialized = false; | |
c7c4d063 PB |
404 | #ifndef __linux__ |
405 | pthread_mutex_destroy(&ev->lock); | |
406 | pthread_cond_destroy(&ev->cond); | |
407 | #endif | |
408 | } | |
409 | ||
410 | void qemu_event_set(QemuEvent *ev) | |
411 | { | |
374293ca PB |
412 | /* qemu_event_set has release semantics, but because it *loads* |
413 | * ev->value we need a full memory barrier here. | |
414 | */ | |
c096358e | 415 | assert(ev->initialized); |
374293ca PB |
416 | smp_mb(); |
417 | if (atomic_read(&ev->value) != EV_SET) { | |
c7c4d063 PB |
418 | if (atomic_xchg(&ev->value, EV_SET) == EV_BUSY) { |
419 | /* There were waiters, wake them up. */ | |
fbcc3e50 | 420 | qemu_futex_wake(ev, INT_MAX); |
c7c4d063 PB |
421 | } |
422 | } | |
423 | } | |
424 | ||
425 | void qemu_event_reset(QemuEvent *ev) | |
426 | { | |
374293ca PB |
427 | unsigned value; |
428 | ||
c096358e | 429 | assert(ev->initialized); |
374293ca PB |
430 | value = atomic_read(&ev->value); |
431 | smp_mb_acquire(); | |
432 | if (value == EV_SET) { | |
c7c4d063 PB |
433 | /* |
434 | * If there was a concurrent reset (or even reset+wait), | |
435 | * do nothing. Otherwise change EV_SET->EV_FREE. | |
436 | */ | |
437 | atomic_or(&ev->value, EV_FREE); | |
438 | } | |
439 | } | |
440 | ||
441 | void qemu_event_wait(QemuEvent *ev) | |
442 | { | |
443 | unsigned value; | |
444 | ||
c096358e | 445 | assert(ev->initialized); |
374293ca PB |
446 | value = atomic_read(&ev->value); |
447 | smp_mb_acquire(); | |
c7c4d063 PB |
448 | if (value != EV_SET) { |
449 | if (value == EV_FREE) { | |
450 | /* | |
451 | * Leave the event reset and tell qemu_event_set that there | |
452 | * are waiters. No need to retry, because there cannot be | |
67cc32eb | 453 | * a concurrent busy->free transition. After the CAS, the |
c7c4d063 PB |
454 | * event will be either set or busy. |
455 | */ | |
456 | if (atomic_cmpxchg(&ev->value, EV_FREE, EV_BUSY) == EV_SET) { | |
457 | return; | |
458 | } | |
459 | } | |
fbcc3e50 | 460 | qemu_futex_wait(ev, EV_BUSY); |
c7c4d063 PB |
461 | } |
462 | } | |
463 | ||
a458774a | 464 | static __thread NotifierList thread_exit; |
ef57137f | 465 | |
a458774a PM |
466 | /* |
467 | * Note that in this implementation you can register a thread-exit | |
468 | * notifier for the main thread, but it will never be called. | |
469 | * This is OK because main thread exit can only happen when the | |
470 | * entire process is exiting, and the API allows notifiers to not | |
471 | * be called on process exit. | |
472 | */ | |
ef57137f PB |
473 | void qemu_thread_atexit_add(Notifier *notifier) |
474 | { | |
a458774a | 475 | notifier_list_add(&thread_exit, notifier); |
ef57137f PB |
476 | } |
477 | ||
478 | void qemu_thread_atexit_remove(Notifier *notifier) | |
479 | { | |
ef57137f | 480 | notifier_remove(notifier); |
ef57137f PB |
481 | } |
482 | ||
a458774a | 483 | static void qemu_thread_atexit_notify(void *arg) |
ef57137f | 484 | { |
a458774a PM |
485 | /* |
486 | * Called when non-main thread exits (via qemu_thread_exit() | |
487 | * or by returning from its start routine.) | |
488 | */ | |
489 | notifier_list_notify(&thread_exit, NULL); | |
ef57137f PB |
490 | } |
491 | ||
68a93982 | 492 | typedef struct { |
493 | void *(*start_routine)(void *); | |
494 | void *arg; | |
495 | char *name; | |
496 | } QemuThreadArgs; | |
497 | ||
498 | static void *qemu_thread_start(void *args) | |
499 | { | |
500 | QemuThreadArgs *qemu_thread_args = args; | |
501 | void *(*start_routine)(void *) = qemu_thread_args->start_routine; | |
502 | void *arg = qemu_thread_args->arg; | |
a458774a | 503 | void *r; |
68a93982 | 504 | |
479a5747 | 505 | #ifdef CONFIG_THREAD_SETNAME_BYTHREAD |
68a93982 | 506 | /* Attempt to set the threads name; note that this is for debug, so |
507 | * we're not going to fail if we can't set it. | |
508 | */ | |
d820fa5b | 509 | if (name_threads && qemu_thread_args->name) { |
479a5747 | 510 | # if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID) |
d820fa5b | 511 | pthread_setname_np(pthread_self(), qemu_thread_args->name); |
479a5747 RB |
512 | # elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID) |
513 | pthread_setname_np(qemu_thread_args->name); | |
514 | # endif | |
d820fa5b PX |
515 | } |
516 | #endif | |
ce9f0e5b | 517 | QEMU_TSAN_ANNOTATE_THREAD_NAME(qemu_thread_args->name); |
68a93982 | 518 | g_free(qemu_thread_args->name); |
519 | g_free(qemu_thread_args); | |
a458774a PM |
520 | pthread_cleanup_push(qemu_thread_atexit_notify, NULL); |
521 | r = start_routine(arg); | |
522 | pthread_cleanup_pop(1); | |
523 | return r; | |
5c312079 DDAG |
524 | } |
525 | ||
4900116e | 526 | void qemu_thread_create(QemuThread *thread, const char *name, |
e5d355d1 | 527 | void *(*start_routine)(void*), |
cf218714 | 528 | void *arg, int mode) |
e5d355d1 | 529 | { |
cf218714 | 530 | sigset_t set, oldset; |
e5d355d1 | 531 | int err; |
8763046b | 532 | pthread_attr_t attr; |
d820fa5b | 533 | QemuThreadArgs *qemu_thread_args; |
e5d355d1 | 534 | |
8763046b JK |
535 | err = pthread_attr_init(&attr); |
536 | if (err) { | |
537 | error_exit(err, __func__); | |
538 | } | |
55541c8a | 539 | |
68a93982 | 540 | if (mode == QEMU_THREAD_DETACHED) { |
541 | pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
542 | } | |
543 | ||
cf218714 | 544 | /* Leave signal handling to the iothread. */ |
55541c8a | 545 | sigfillset(&set); |
21a43af0 RB |
546 | /* Blocking the signals can result in undefined behaviour. */ |
547 | sigdelset(&set, SIGSEGV); | |
548 | sigdelset(&set, SIGFPE); | |
549 | sigdelset(&set, SIGILL); | |
550 | /* TODO avoid SIGBUS loss on macOS */ | |
55541c8a | 551 | pthread_sigmask(SIG_SETMASK, &set, &oldset); |
55541c8a | 552 | |
d820fa5b PX |
553 | qemu_thread_args = g_new0(QemuThreadArgs, 1); |
554 | qemu_thread_args->name = g_strdup(name); | |
555 | qemu_thread_args->start_routine = start_routine; | |
556 | qemu_thread_args->arg = arg; | |
557 | ||
558 | err = pthread_create(&thread->thread, &attr, | |
559 | qemu_thread_start, qemu_thread_args); | |
4900116e | 560 | |
68a93982 | 561 | if (err) |
562 | error_exit(err, __func__); | |
563 | ||
55541c8a | 564 | pthread_sigmask(SIG_SETMASK, &oldset, NULL); |
8763046b JK |
565 | |
566 | pthread_attr_destroy(&attr); | |
e5d355d1 AL |
567 | } |
568 | ||
b7680cb6 | 569 | void qemu_thread_get_self(QemuThread *thread) |
e5d355d1 AL |
570 | { |
571 | thread->thread = pthread_self(); | |
572 | } | |
573 | ||
2d797b65 | 574 | bool qemu_thread_is_self(QemuThread *thread) |
e5d355d1 | 575 | { |
b7680cb6 | 576 | return pthread_equal(pthread_self(), thread->thread); |
e5d355d1 AL |
577 | } |
578 | ||
313b1d69 CC |
579 | void qemu_thread_exit(void *retval) |
580 | { | |
581 | pthread_exit(retval); | |
582 | } | |
8763046b JK |
583 | |
584 | void *qemu_thread_join(QemuThread *thread) | |
585 | { | |
586 | int err; | |
587 | void *ret; | |
588 | ||
589 | err = pthread_join(thread->thread, &ret); | |
590 | if (err) { | |
591 | error_exit(err, __func__); | |
592 | } | |
593 | return ret; | |
594 | } |