Commit | Line | Data |
---|---|---|
331744e3 JD |
1 | /* |
2 | * Copyright (C) 2012 - Julien Desfossez <julien.desfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License, version 2 only, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <assert.h> | |
21 | #include <inttypes.h> | |
22 | #include <signal.h> | |
23 | ||
51a9e1c7 | 24 | #include <bin/lttng-consumerd/health-consumerd.h> |
331744e3 | 25 | #include <common/common.h> |
f263b7fd | 26 | #include <common/compat/endian.h> |
d3e2ba59 JD |
27 | #include <common/kernel-ctl/kernel-ctl.h> |
28 | #include <common/kernel-consumer/kernel-consumer.h> | |
29 | #include <common/consumer-stream.h> | |
331744e3 JD |
30 | |
31 | #include "consumer-timer.h" | |
2d57de81 | 32 | #include "consumer-testpoint.h" |
331744e3 JD |
33 | #include "ust-consumer/ust-consumer.h" |
34 | ||
2b8f8754 MD |
35 | static struct timer_signal_data timer_signal = { |
36 | .tid = 0, | |
37 | .setup_done = 0, | |
38 | .qs_done = 0, | |
39 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
40 | }; | |
331744e3 JD |
41 | |
42 | /* | |
43 | * Set custom signal mask to current thread. | |
44 | */ | |
45 | static void setmask(sigset_t *mask) | |
46 | { | |
47 | int ret; | |
48 | ||
49 | ret = sigemptyset(mask); | |
50 | if (ret) { | |
51 | PERROR("sigemptyset"); | |
52 | } | |
53 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_SWITCH); | |
54 | if (ret) { | |
d3e2ba59 | 55 | PERROR("sigaddset switch"); |
331744e3 JD |
56 | } |
57 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_TEARDOWN); | |
58 | if (ret) { | |
d3e2ba59 JD |
59 | PERROR("sigaddset teardown"); |
60 | } | |
61 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_LIVE); | |
62 | if (ret) { | |
63 | PERROR("sigaddset live"); | |
331744e3 JD |
64 | } |
65 | } | |
66 | ||
67 | /* | |
68 | * Execute action on a timer switch. | |
d98a47c7 MD |
69 | * |
70 | * Beware: metadata_switch_timer() should *never* take a mutex also held | |
71 | * while consumer_timer_switch_stop() is called. It would result in | |
72 | * deadlocks. | |
331744e3 JD |
73 | */ |
74 | static void metadata_switch_timer(struct lttng_consumer_local_data *ctx, | |
75 | int sig, siginfo_t *si, void *uc) | |
76 | { | |
77 | int ret; | |
78 | struct lttng_consumer_channel *channel; | |
79 | ||
80 | channel = si->si_value.sival_ptr; | |
81 | assert(channel); | |
82 | ||
4419b4fb MD |
83 | if (channel->switch_timer_error) { |
84 | return; | |
85 | } | |
86 | ||
331744e3 JD |
87 | DBG("Switch timer for channel %" PRIu64, channel->key); |
88 | switch (ctx->type) { | |
89 | case LTTNG_CONSUMER32_UST: | |
90 | case LTTNG_CONSUMER64_UST: | |
4fa3dc0e MD |
91 | /* |
92 | * Locks taken by lttng_ustconsumer_request_metadata(): | |
93 | * - metadata_socket_lock | |
94 | * - Calling lttng_ustconsumer_recv_metadata(): | |
f82d9449 | 95 | * - channel->metadata_cache->lock |
4fa3dc0e | 96 | * - Calling consumer_metadata_cache_flushed(): |
5e41ebe1 MD |
97 | * - channel->timer_lock |
98 | * - channel->metadata_cache->lock | |
4fa3dc0e | 99 | * |
5e41ebe1 MD |
100 | * Ensure that neither consumer_data.lock nor |
101 | * channel->lock are taken within this function, since | |
102 | * they are held while consumer_timer_switch_stop() is | |
103 | * called. | |
4fa3dc0e | 104 | */ |
94d49140 | 105 | ret = lttng_ustconsumer_request_metadata(ctx, channel, 1, 1); |
331744e3 | 106 | if (ret < 0) { |
4419b4fb | 107 | channel->switch_timer_error = 1; |
331744e3 JD |
108 | } |
109 | break; | |
110 | case LTTNG_CONSUMER_KERNEL: | |
111 | case LTTNG_CONSUMER_UNKNOWN: | |
112 | assert(0); | |
113 | break; | |
114 | } | |
115 | } | |
116 | ||
528f2ffa JD |
117 | static int send_empty_index(struct lttng_consumer_stream *stream, uint64_t ts, |
118 | uint64_t stream_id) | |
d3e2ba59 JD |
119 | { |
120 | int ret; | |
50adc264 | 121 | struct ctf_packet_index index; |
d3e2ba59 JD |
122 | |
123 | memset(&index, 0, sizeof(index)); | |
528f2ffa | 124 | index.stream_id = htobe64(stream_id); |
d3e2ba59 JD |
125 | index.timestamp_end = htobe64(ts); |
126 | ret = consumer_stream_write_index(stream, &index); | |
127 | if (ret < 0) { | |
128 | goto error; | |
129 | } | |
130 | ||
131 | error: | |
132 | return ret; | |
133 | } | |
134 | ||
5cc6b3e4 | 135 | int consumer_flush_kernel_index(struct lttng_consumer_stream *stream) |
d3e2ba59 | 136 | { |
528f2ffa | 137 | uint64_t ts, stream_id; |
d3e2ba59 JD |
138 | int ret; |
139 | ||
d3e2ba59 JD |
140 | ret = kernctl_get_current_timestamp(stream->wait_fd, &ts); |
141 | if (ret < 0) { | |
142 | ERR("Failed to get the current timestamp"); | |
5cc6b3e4 | 143 | goto end; |
d3e2ba59 JD |
144 | } |
145 | ret = kernctl_buffer_flush(stream->wait_fd); | |
146 | if (ret < 0) { | |
147 | ERR("Failed to flush kernel stream"); | |
5cc6b3e4 | 148 | goto end; |
d3e2ba59 JD |
149 | } |
150 | ret = kernctl_snapshot(stream->wait_fd); | |
151 | if (ret < 0) { | |
08b1dcd3 DG |
152 | if (errno != EAGAIN && errno != ENODATA) { |
153 | PERROR("live timer kernel snapshot"); | |
d3e2ba59 | 154 | ret = -1; |
5cc6b3e4 | 155 | goto end; |
d3e2ba59 | 156 | } |
528f2ffa JD |
157 | ret = kernctl_get_stream_id(stream->wait_fd, &stream_id); |
158 | if (ret < 0) { | |
159 | PERROR("kernctl_get_stream_id"); | |
5cc6b3e4 | 160 | goto end; |
528f2ffa | 161 | } |
d3e2ba59 | 162 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 163 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 164 | if (ret < 0) { |
5cc6b3e4 | 165 | goto end; |
d3e2ba59 JD |
166 | } |
167 | } | |
168 | ret = 0; | |
5cc6b3e4 | 169 | end: |
d3e2ba59 JD |
170 | return ret; |
171 | } | |
172 | ||
5cc6b3e4 | 173 | static int check_kernel_stream(struct lttng_consumer_stream *stream) |
d3e2ba59 | 174 | { |
d3e2ba59 JD |
175 | int ret; |
176 | ||
d3e2ba59 JD |
177 | /* |
178 | * While holding the stream mutex, try to take a snapshot, if it | |
179 | * succeeds, it means that data is ready to be sent, just let the data | |
180 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
181 | * means that there is no data to read after the flush, so we can | |
182 | * safely send the empty index. | |
5cc6b3e4 MD |
183 | * |
184 | * Doing a trylock and checking if waiting on metadata if | |
185 | * trylock fails. Bail out of the stream is indeed waiting for | |
186 | * metadata to be pushed. Busy wait on trylock otherwise. | |
d3e2ba59 | 187 | */ |
5cc6b3e4 MD |
188 | for (;;) { |
189 | ret = pthread_mutex_trylock(&stream->lock); | |
190 | switch (ret) { | |
191 | case 0: | |
192 | break; /* We have the lock. */ | |
193 | case EBUSY: | |
194 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
195 | if (stream->waiting_on_metadata) { | |
196 | ret = 0; | |
197 | stream->missed_metadata_flush = true; | |
198 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
199 | goto end; /* Bail out. */ | |
200 | } | |
201 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
202 | /* Try again. */ | |
203 | caa_cpu_relax(); | |
204 | continue; | |
205 | default: | |
206 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
207 | ret = -1; | |
208 | goto end; | |
209 | } | |
210 | break; | |
211 | } | |
212 | ret = consumer_flush_kernel_index(stream); | |
213 | pthread_mutex_unlock(&stream->lock); | |
214 | end: | |
215 | return ret; | |
216 | } | |
217 | ||
218 | int consumer_flush_ust_index(struct lttng_consumer_stream *stream) | |
219 | { | |
220 | uint64_t ts, stream_id; | |
221 | int ret; | |
222 | ||
94d49140 JD |
223 | ret = cds_lfht_is_node_deleted(&stream->node.node); |
224 | if (ret) { | |
5cc6b3e4 | 225 | goto end; |
94d49140 JD |
226 | } |
227 | ||
84a182ce | 228 | ret = lttng_ustconsumer_get_current_timestamp(stream, &ts); |
d3e2ba59 JD |
229 | if (ret < 0) { |
230 | ERR("Failed to get the current timestamp"); | |
5cc6b3e4 | 231 | goto end; |
d3e2ba59 | 232 | } |
84a182ce DG |
233 | lttng_ustconsumer_flush_buffer(stream, 1); |
234 | ret = lttng_ustconsumer_take_snapshot(stream); | |
d3e2ba59 | 235 | if (ret < 0) { |
94d49140 | 236 | if (ret != -EAGAIN) { |
d3e2ba59 JD |
237 | ERR("Taking UST snapshot"); |
238 | ret = -1; | |
5cc6b3e4 | 239 | goto end; |
d3e2ba59 | 240 | } |
70190e1c | 241 | ret = lttng_ustconsumer_get_stream_id(stream, &stream_id); |
528f2ffa JD |
242 | if (ret < 0) { |
243 | PERROR("ustctl_get_stream_id"); | |
5cc6b3e4 | 244 | goto end; |
528f2ffa | 245 | } |
d3e2ba59 | 246 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 247 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 248 | if (ret < 0) { |
5cc6b3e4 | 249 | goto end; |
d3e2ba59 JD |
250 | } |
251 | } | |
252 | ret = 0; | |
5cc6b3e4 MD |
253 | end: |
254 | return ret; | |
255 | } | |
d3e2ba59 | 256 | |
5cc6b3e4 MD |
257 | static int check_ust_stream(struct lttng_consumer_stream *stream) |
258 | { | |
259 | int ret; | |
260 | ||
261 | assert(stream); | |
262 | assert(stream->ustream); | |
263 | /* | |
264 | * While holding the stream mutex, try to take a snapshot, if it | |
265 | * succeeds, it means that data is ready to be sent, just let the data | |
266 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
267 | * means that there is no data to read after the flush, so we can | |
268 | * safely send the empty index. | |
269 | * | |
270 | * Doing a trylock and checking if waiting on metadata if | |
271 | * trylock fails. Bail out of the stream is indeed waiting for | |
272 | * metadata to be pushed. Busy wait on trylock otherwise. | |
273 | */ | |
274 | for (;;) { | |
275 | ret = pthread_mutex_trylock(&stream->lock); | |
276 | switch (ret) { | |
277 | case 0: | |
278 | break; /* We have the lock. */ | |
279 | case EBUSY: | |
280 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
281 | if (stream->waiting_on_metadata) { | |
282 | ret = 0; | |
283 | stream->missed_metadata_flush = true; | |
284 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
285 | goto end; /* Bail out. */ | |
286 | } | |
287 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
288 | /* Try again. */ | |
289 | caa_cpu_relax(); | |
290 | continue; | |
291 | default: | |
292 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
293 | ret = -1; | |
294 | goto end; | |
295 | } | |
296 | break; | |
297 | } | |
298 | ret = consumer_flush_ust_index(stream); | |
d3e2ba59 | 299 | pthread_mutex_unlock(&stream->lock); |
5cc6b3e4 | 300 | end: |
d3e2ba59 JD |
301 | return ret; |
302 | } | |
303 | ||
304 | /* | |
305 | * Execute action on a live timer | |
306 | */ | |
307 | static void live_timer(struct lttng_consumer_local_data *ctx, | |
308 | int sig, siginfo_t *si, void *uc) | |
309 | { | |
310 | int ret; | |
311 | struct lttng_consumer_channel *channel; | |
312 | struct lttng_consumer_stream *stream; | |
313 | struct lttng_ht *ht; | |
314 | struct lttng_ht_iter iter; | |
315 | ||
316 | channel = si->si_value.sival_ptr; | |
317 | assert(channel); | |
318 | ||
319 | if (channel->switch_timer_error) { | |
320 | goto error; | |
321 | } | |
322 | ht = consumer_data.stream_per_chan_id_ht; | |
323 | ||
324 | DBG("Live timer for channel %" PRIu64, channel->key); | |
325 | ||
326 | rcu_read_lock(); | |
327 | switch (ctx->type) { | |
328 | case LTTNG_CONSUMER32_UST: | |
329 | case LTTNG_CONSUMER64_UST: | |
330 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
331 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
332 | ht->match_fct, &channel->key, &iter.iter, | |
333 | stream, node_channel_id.node) { | |
334 | ret = check_ust_stream(stream); | |
335 | if (ret < 0) { | |
336 | goto error_unlock; | |
337 | } | |
338 | } | |
339 | break; | |
340 | case LTTNG_CONSUMER_KERNEL: | |
341 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
342 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
343 | ht->match_fct, &channel->key, &iter.iter, | |
344 | stream, node_channel_id.node) { | |
345 | ret = check_kernel_stream(stream); | |
346 | if (ret < 0) { | |
347 | goto error_unlock; | |
348 | } | |
349 | } | |
350 | break; | |
351 | case LTTNG_CONSUMER_UNKNOWN: | |
352 | assert(0); | |
353 | break; | |
354 | } | |
355 | ||
356 | error_unlock: | |
357 | rcu_read_unlock(); | |
358 | ||
359 | error: | |
360 | return; | |
361 | } | |
362 | ||
2b8f8754 MD |
363 | static |
364 | void consumer_timer_signal_thread_qs(unsigned int signr) | |
365 | { | |
366 | sigset_t pending_set; | |
367 | int ret; | |
368 | ||
369 | /* | |
370 | * We need to be the only thread interacting with the thread | |
371 | * that manages signals for teardown synchronization. | |
372 | */ | |
373 | pthread_mutex_lock(&timer_signal.lock); | |
374 | ||
375 | /* Ensure we don't have any signal queued for this channel. */ | |
376 | for (;;) { | |
377 | ret = sigemptyset(&pending_set); | |
378 | if (ret == -1) { | |
379 | PERROR("sigemptyset"); | |
380 | } | |
381 | ret = sigpending(&pending_set); | |
382 | if (ret == -1) { | |
383 | PERROR("sigpending"); | |
384 | } | |
385 | if (!sigismember(&pending_set, LTTNG_CONSUMER_SIG_SWITCH)) { | |
386 | break; | |
387 | } | |
388 | caa_cpu_relax(); | |
389 | } | |
390 | ||
391 | /* | |
392 | * From this point, no new signal handler will be fired that would try to | |
393 | * access "chan". However, we still need to wait for any currently | |
394 | * executing handler to complete. | |
395 | */ | |
396 | cmm_smp_mb(); | |
397 | CMM_STORE_SHARED(timer_signal.qs_done, 0); | |
398 | cmm_smp_mb(); | |
399 | ||
400 | /* | |
401 | * Kill with LTTNG_CONSUMER_SIG_TEARDOWN, so signal management thread wakes | |
402 | * up. | |
403 | */ | |
404 | kill(getpid(), LTTNG_CONSUMER_SIG_TEARDOWN); | |
405 | ||
406 | while (!CMM_LOAD_SHARED(timer_signal.qs_done)) { | |
407 | caa_cpu_relax(); | |
408 | } | |
409 | cmm_smp_mb(); | |
410 | ||
411 | pthread_mutex_unlock(&timer_signal.lock); | |
412 | } | |
413 | ||
331744e3 JD |
414 | /* |
415 | * Set the timer for periodical metadata flush. | |
416 | */ | |
417 | void consumer_timer_switch_start(struct lttng_consumer_channel *channel, | |
418 | unsigned int switch_timer_interval) | |
419 | { | |
420 | int ret; | |
421 | struct sigevent sev; | |
422 | struct itimerspec its; | |
423 | ||
424 | assert(channel); | |
425 | assert(channel->key); | |
426 | ||
427 | if (switch_timer_interval == 0) { | |
428 | return; | |
429 | } | |
430 | ||
431 | sev.sigev_notify = SIGEV_SIGNAL; | |
432 | sev.sigev_signo = LTTNG_CONSUMER_SIG_SWITCH; | |
433 | sev.sigev_value.sival_ptr = channel; | |
434 | ret = timer_create(CLOCKID, &sev, &channel->switch_timer); | |
435 | if (ret == -1) { | |
436 | PERROR("timer_create"); | |
437 | } | |
438 | channel->switch_timer_enabled = 1; | |
439 | ||
440 | its.it_value.tv_sec = switch_timer_interval / 1000000; | |
b6898a3c | 441 | its.it_value.tv_nsec = (switch_timer_interval % 1000000) * 1000; |
331744e3 JD |
442 | its.it_interval.tv_sec = its.it_value.tv_sec; |
443 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
444 | ||
445 | ret = timer_settime(channel->switch_timer, 0, &its, NULL); | |
446 | if (ret == -1) { | |
447 | PERROR("timer_settime"); | |
448 | } | |
449 | } | |
450 | ||
451 | /* | |
452 | * Stop and delete timer. | |
453 | */ | |
454 | void consumer_timer_switch_stop(struct lttng_consumer_channel *channel) | |
455 | { | |
456 | int ret; | |
331744e3 JD |
457 | |
458 | assert(channel); | |
459 | ||
460 | ret = timer_delete(channel->switch_timer); | |
461 | if (ret == -1) { | |
462 | PERROR("timer_delete"); | |
463 | } | |
464 | ||
2b8f8754 | 465 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_SWITCH); |
331744e3 | 466 | |
2b8f8754 MD |
467 | channel->switch_timer = 0; |
468 | channel->switch_timer_enabled = 0; | |
331744e3 JD |
469 | } |
470 | ||
d3e2ba59 JD |
471 | /* |
472 | * Set the timer for the live mode. | |
473 | */ | |
474 | void consumer_timer_live_start(struct lttng_consumer_channel *channel, | |
475 | int live_timer_interval) | |
476 | { | |
477 | int ret; | |
478 | struct sigevent sev; | |
479 | struct itimerspec its; | |
480 | ||
481 | assert(channel); | |
482 | assert(channel->key); | |
483 | ||
fac41e72 | 484 | if (live_timer_interval <= 0) { |
d3e2ba59 JD |
485 | return; |
486 | } | |
487 | ||
488 | sev.sigev_notify = SIGEV_SIGNAL; | |
489 | sev.sigev_signo = LTTNG_CONSUMER_SIG_LIVE; | |
490 | sev.sigev_value.sival_ptr = channel; | |
491 | ret = timer_create(CLOCKID, &sev, &channel->live_timer); | |
492 | if (ret == -1) { | |
493 | PERROR("timer_create"); | |
494 | } | |
495 | channel->live_timer_enabled = 1; | |
496 | ||
497 | its.it_value.tv_sec = live_timer_interval / 1000000; | |
b6898a3c | 498 | its.it_value.tv_nsec = (live_timer_interval % 1000000) * 1000; |
d3e2ba59 JD |
499 | its.it_interval.tv_sec = its.it_value.tv_sec; |
500 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
501 | ||
502 | ret = timer_settime(channel->live_timer, 0, &its, NULL); | |
503 | if (ret == -1) { | |
504 | PERROR("timer_settime"); | |
505 | } | |
506 | } | |
507 | ||
508 | /* | |
509 | * Stop and delete timer. | |
510 | */ | |
511 | void consumer_timer_live_stop(struct lttng_consumer_channel *channel) | |
512 | { | |
513 | int ret; | |
514 | ||
515 | assert(channel); | |
516 | ||
517 | ret = timer_delete(channel->live_timer); | |
518 | if (ret == -1) { | |
519 | PERROR("timer_delete"); | |
520 | } | |
521 | ||
522 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_LIVE); | |
523 | ||
524 | channel->live_timer = 0; | |
525 | channel->live_timer_enabled = 0; | |
526 | } | |
527 | ||
331744e3 JD |
528 | /* |
529 | * Block the RT signals for the entire process. It must be called from the | |
530 | * consumer main before creating the threads | |
531 | */ | |
532 | void consumer_signal_init(void) | |
533 | { | |
534 | int ret; | |
535 | sigset_t mask; | |
536 | ||
537 | /* Block signal for entire process, so only our thread processes it. */ | |
538 | setmask(&mask); | |
539 | ret = pthread_sigmask(SIG_BLOCK, &mask, NULL); | |
540 | if (ret) { | |
541 | errno = ret; | |
542 | PERROR("pthread_sigmask"); | |
543 | } | |
544 | } | |
545 | ||
546 | /* | |
d3e2ba59 JD |
547 | * This thread is the sighandler for signals LTTNG_CONSUMER_SIG_SWITCH, |
548 | * LTTNG_CONSUMER_SIG_TEARDOWN and LTTNG_CONSUMER_SIG_LIVE. | |
331744e3 | 549 | */ |
d3e2ba59 | 550 | void *consumer_timer_thread(void *data) |
331744e3 JD |
551 | { |
552 | int signr; | |
553 | sigset_t mask; | |
554 | siginfo_t info; | |
555 | struct lttng_consumer_local_data *ctx = data; | |
556 | ||
8f79de7e MD |
557 | rcu_register_thread(); |
558 | ||
1fc79fb4 MD |
559 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA_TIMER); |
560 | ||
2d57de81 MD |
561 | if (testpoint(consumerd_thread_metadata_timer)) { |
562 | goto error_testpoint; | |
563 | } | |
564 | ||
9ce5646a MD |
565 | health_code_update(); |
566 | ||
331744e3 JD |
567 | /* Only self thread will receive signal mask. */ |
568 | setmask(&mask); | |
569 | CMM_STORE_SHARED(timer_signal.tid, pthread_self()); | |
570 | ||
571 | while (1) { | |
9ce5646a MD |
572 | health_code_update(); |
573 | ||
574 | health_poll_entry(); | |
331744e3 | 575 | signr = sigwaitinfo(&mask, &info); |
9ce5646a | 576 | health_poll_exit(); |
331744e3 JD |
577 | if (signr == -1) { |
578 | if (errno != EINTR) { | |
579 | PERROR("sigwaitinfo"); | |
580 | } | |
581 | continue; | |
582 | } else if (signr == LTTNG_CONSUMER_SIG_SWITCH) { | |
583 | metadata_switch_timer(ctx, info.si_signo, &info, NULL); | |
584 | } else if (signr == LTTNG_CONSUMER_SIG_TEARDOWN) { | |
585 | cmm_smp_mb(); | |
586 | CMM_STORE_SHARED(timer_signal.qs_done, 1); | |
587 | cmm_smp_mb(); | |
588 | DBG("Signal timer metadata thread teardown"); | |
d3e2ba59 JD |
589 | } else if (signr == LTTNG_CONSUMER_SIG_LIVE) { |
590 | live_timer(ctx, info.si_signo, &info, NULL); | |
331744e3 JD |
591 | } else { |
592 | ERR("Unexpected signal %d\n", info.si_signo); | |
593 | } | |
594 | } | |
595 | ||
2d57de81 MD |
596 | error_testpoint: |
597 | /* Only reached in testpoint error */ | |
598 | health_error(); | |
1fc79fb4 MD |
599 | health_unregister(health_consumerd); |
600 | ||
8f79de7e MD |
601 | rcu_unregister_thread(); |
602 | ||
1fc79fb4 | 603 | /* Never return */ |
331744e3 JD |
604 | return NULL; |
605 | } |