Commit | Line | Data |
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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 | ||
6c1c0768 | 19 | #define _LGPL_SOURCE |
331744e3 JD |
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> | |
c8fea79c JR |
29 | #include <common/consumer/consumer-stream.h> |
30 | #include <common/consumer/consumer-timer.h> | |
31 | #include <common/consumer/consumer-testpoint.h> | |
32 | #include <common/ust-consumer/ust-consumer.h> | |
331744e3 | 33 | |
2b8f8754 MD |
34 | static struct timer_signal_data timer_signal = { |
35 | .tid = 0, | |
36 | .setup_done = 0, | |
37 | .qs_done = 0, | |
38 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
39 | }; | |
331744e3 JD |
40 | |
41 | /* | |
42 | * Set custom signal mask to current thread. | |
43 | */ | |
44 | static void setmask(sigset_t *mask) | |
45 | { | |
46 | int ret; | |
47 | ||
48 | ret = sigemptyset(mask); | |
49 | if (ret) { | |
50 | PERROR("sigemptyset"); | |
51 | } | |
52 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_SWITCH); | |
53 | if (ret) { | |
d3e2ba59 | 54 | PERROR("sigaddset switch"); |
331744e3 JD |
55 | } |
56 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_TEARDOWN); | |
57 | if (ret) { | |
d3e2ba59 JD |
58 | PERROR("sigaddset teardown"); |
59 | } | |
60 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_LIVE); | |
61 | if (ret) { | |
62 | PERROR("sigaddset live"); | |
331744e3 JD |
63 | } |
64 | } | |
65 | ||
66 | /* | |
67 | * Execute action on a timer switch. | |
d98a47c7 MD |
68 | * |
69 | * Beware: metadata_switch_timer() should *never* take a mutex also held | |
70 | * while consumer_timer_switch_stop() is called. It would result in | |
71 | * deadlocks. | |
331744e3 JD |
72 | */ |
73 | static void metadata_switch_timer(struct lttng_consumer_local_data *ctx, | |
74 | int sig, siginfo_t *si, void *uc) | |
75 | { | |
76 | int ret; | |
77 | struct lttng_consumer_channel *channel; | |
78 | ||
79 | channel = si->si_value.sival_ptr; | |
80 | assert(channel); | |
81 | ||
4419b4fb MD |
82 | if (channel->switch_timer_error) { |
83 | return; | |
84 | } | |
85 | ||
331744e3 JD |
86 | DBG("Switch timer for channel %" PRIu64, channel->key); |
87 | switch (ctx->type) { | |
88 | case LTTNG_CONSUMER32_UST: | |
89 | case LTTNG_CONSUMER64_UST: | |
4fa3dc0e MD |
90 | /* |
91 | * Locks taken by lttng_ustconsumer_request_metadata(): | |
92 | * - metadata_socket_lock | |
93 | * - Calling lttng_ustconsumer_recv_metadata(): | |
f82d9449 | 94 | * - channel->metadata_cache->lock |
4fa3dc0e | 95 | * - Calling consumer_metadata_cache_flushed(): |
5e41ebe1 MD |
96 | * - channel->timer_lock |
97 | * - channel->metadata_cache->lock | |
4fa3dc0e | 98 | * |
5e41ebe1 MD |
99 | * Ensure that neither consumer_data.lock nor |
100 | * channel->lock are taken within this function, since | |
101 | * they are held while consumer_timer_switch_stop() is | |
102 | * called. | |
4fa3dc0e | 103 | */ |
94d49140 | 104 | ret = lttng_ustconsumer_request_metadata(ctx, channel, 1, 1); |
331744e3 | 105 | if (ret < 0) { |
4419b4fb | 106 | channel->switch_timer_error = 1; |
331744e3 JD |
107 | } |
108 | break; | |
109 | case LTTNG_CONSUMER_KERNEL: | |
110 | case LTTNG_CONSUMER_UNKNOWN: | |
111 | assert(0); | |
112 | break; | |
113 | } | |
114 | } | |
115 | ||
528f2ffa JD |
116 | static int send_empty_index(struct lttng_consumer_stream *stream, uint64_t ts, |
117 | uint64_t stream_id) | |
d3e2ba59 JD |
118 | { |
119 | int ret; | |
50adc264 | 120 | struct ctf_packet_index index; |
d3e2ba59 JD |
121 | |
122 | memset(&index, 0, sizeof(index)); | |
528f2ffa | 123 | index.stream_id = htobe64(stream_id); |
d3e2ba59 JD |
124 | index.timestamp_end = htobe64(ts); |
125 | ret = consumer_stream_write_index(stream, &index); | |
126 | if (ret < 0) { | |
127 | goto error; | |
128 | } | |
129 | ||
130 | error: | |
131 | return ret; | |
132 | } | |
133 | ||
c585821b | 134 | int consumer_flush_kernel_index(struct lttng_consumer_stream *stream) |
d3e2ba59 | 135 | { |
528f2ffa | 136 | uint64_t ts, stream_id; |
d3e2ba59 JD |
137 | int ret; |
138 | ||
d3e2ba59 JD |
139 | ret = kernctl_get_current_timestamp(stream->wait_fd, &ts); |
140 | if (ret < 0) { | |
141 | ERR("Failed to get the current timestamp"); | |
c585821b | 142 | goto end; |
d3e2ba59 JD |
143 | } |
144 | ret = kernctl_buffer_flush(stream->wait_fd); | |
145 | if (ret < 0) { | |
146 | ERR("Failed to flush kernel stream"); | |
c585821b | 147 | goto end; |
d3e2ba59 JD |
148 | } |
149 | ret = kernctl_snapshot(stream->wait_fd); | |
150 | if (ret < 0) { | |
32af2c95 | 151 | if (ret != -EAGAIN && ret != -ENODATA) { |
08b1dcd3 | 152 | PERROR("live timer kernel snapshot"); |
d3e2ba59 | 153 | ret = -1; |
c585821b | 154 | goto end; |
d3e2ba59 | 155 | } |
528f2ffa JD |
156 | ret = kernctl_get_stream_id(stream->wait_fd, &stream_id); |
157 | if (ret < 0) { | |
158 | PERROR("kernctl_get_stream_id"); | |
c585821b | 159 | goto end; |
528f2ffa | 160 | } |
d3e2ba59 | 161 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 162 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 163 | if (ret < 0) { |
c585821b | 164 | goto end; |
d3e2ba59 JD |
165 | } |
166 | } | |
167 | ret = 0; | |
c585821b | 168 | end: |
d3e2ba59 JD |
169 | return ret; |
170 | } | |
171 | ||
c585821b | 172 | static int check_kernel_stream(struct lttng_consumer_stream *stream) |
d3e2ba59 | 173 | { |
d3e2ba59 JD |
174 | int ret; |
175 | ||
d3e2ba59 JD |
176 | /* |
177 | * While holding the stream mutex, try to take a snapshot, if it | |
178 | * succeeds, it means that data is ready to be sent, just let the data | |
179 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
180 | * means that there is no data to read after the flush, so we can | |
181 | * safely send the empty index. | |
c585821b MD |
182 | * |
183 | * Doing a trylock and checking if waiting on metadata if | |
184 | * trylock fails. Bail out of the stream is indeed waiting for | |
185 | * metadata to be pushed. Busy wait on trylock otherwise. | |
d3e2ba59 | 186 | */ |
c585821b MD |
187 | for (;;) { |
188 | ret = pthread_mutex_trylock(&stream->lock); | |
189 | switch (ret) { | |
190 | case 0: | |
191 | break; /* We have the lock. */ | |
192 | case EBUSY: | |
193 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
194 | if (stream->waiting_on_metadata) { | |
195 | ret = 0; | |
196 | stream->missed_metadata_flush = true; | |
197 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
198 | goto end; /* Bail out. */ | |
199 | } | |
200 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
201 | /* Try again. */ | |
202 | caa_cpu_relax(); | |
203 | continue; | |
204 | default: | |
205 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
206 | ret = -1; | |
207 | goto end; | |
208 | } | |
209 | break; | |
210 | } | |
211 | ret = consumer_flush_kernel_index(stream); | |
212 | pthread_mutex_unlock(&stream->lock); | |
213 | end: | |
214 | return ret; | |
215 | } | |
216 | ||
217 | int consumer_flush_ust_index(struct lttng_consumer_stream *stream) | |
218 | { | |
219 | uint64_t ts, stream_id; | |
220 | int ret; | |
221 | ||
94d49140 JD |
222 | ret = cds_lfht_is_node_deleted(&stream->node.node); |
223 | if (ret) { | |
c585821b | 224 | goto end; |
94d49140 JD |
225 | } |
226 | ||
84a182ce | 227 | ret = lttng_ustconsumer_get_current_timestamp(stream, &ts); |
d3e2ba59 JD |
228 | if (ret < 0) { |
229 | ERR("Failed to get the current timestamp"); | |
c585821b | 230 | goto end; |
d3e2ba59 | 231 | } |
84a182ce DG |
232 | lttng_ustconsumer_flush_buffer(stream, 1); |
233 | ret = lttng_ustconsumer_take_snapshot(stream); | |
d3e2ba59 | 234 | if (ret < 0) { |
94d49140 | 235 | if (ret != -EAGAIN) { |
d3e2ba59 JD |
236 | ERR("Taking UST snapshot"); |
237 | ret = -1; | |
c585821b | 238 | goto end; |
d3e2ba59 | 239 | } |
70190e1c | 240 | ret = lttng_ustconsumer_get_stream_id(stream, &stream_id); |
528f2ffa JD |
241 | if (ret < 0) { |
242 | PERROR("ustctl_get_stream_id"); | |
c585821b | 243 | goto end; |
528f2ffa | 244 | } |
d3e2ba59 | 245 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 246 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 247 | if (ret < 0) { |
c585821b | 248 | goto end; |
d3e2ba59 JD |
249 | } |
250 | } | |
251 | ret = 0; | |
c585821b MD |
252 | end: |
253 | return ret; | |
254 | } | |
d3e2ba59 | 255 | |
c585821b MD |
256 | static int check_ust_stream(struct lttng_consumer_stream *stream) |
257 | { | |
258 | int ret; | |
259 | ||
260 | assert(stream); | |
261 | assert(stream->ustream); | |
262 | /* | |
263 | * While holding the stream mutex, try to take a snapshot, if it | |
264 | * succeeds, it means that data is ready to be sent, just let the data | |
265 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
266 | * means that there is no data to read after the flush, so we can | |
267 | * safely send the empty index. | |
268 | * | |
269 | * Doing a trylock and checking if waiting on metadata if | |
270 | * trylock fails. Bail out of the stream is indeed waiting for | |
271 | * metadata to be pushed. Busy wait on trylock otherwise. | |
272 | */ | |
273 | for (;;) { | |
274 | ret = pthread_mutex_trylock(&stream->lock); | |
275 | switch (ret) { | |
276 | case 0: | |
277 | break; /* We have the lock. */ | |
278 | case EBUSY: | |
279 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
280 | if (stream->waiting_on_metadata) { | |
281 | ret = 0; | |
282 | stream->missed_metadata_flush = true; | |
283 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
284 | goto end; /* Bail out. */ | |
285 | } | |
286 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
287 | /* Try again. */ | |
288 | caa_cpu_relax(); | |
289 | continue; | |
290 | default: | |
291 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
292 | ret = -1; | |
293 | goto end; | |
294 | } | |
295 | break; | |
296 | } | |
297 | ret = consumer_flush_ust_index(stream); | |
d3e2ba59 | 298 | pthread_mutex_unlock(&stream->lock); |
c585821b | 299 | end: |
d3e2ba59 JD |
300 | return ret; |
301 | } | |
302 | ||
303 | /* | |
304 | * Execute action on a live timer | |
305 | */ | |
306 | static void live_timer(struct lttng_consumer_local_data *ctx, | |
307 | int sig, siginfo_t *si, void *uc) | |
308 | { | |
309 | int ret; | |
310 | struct lttng_consumer_channel *channel; | |
311 | struct lttng_consumer_stream *stream; | |
312 | struct lttng_ht *ht; | |
313 | struct lttng_ht_iter iter; | |
314 | ||
315 | channel = si->si_value.sival_ptr; | |
316 | assert(channel); | |
317 | ||
318 | if (channel->switch_timer_error) { | |
319 | goto error; | |
320 | } | |
321 | ht = consumer_data.stream_per_chan_id_ht; | |
322 | ||
323 | DBG("Live timer for channel %" PRIu64, channel->key); | |
324 | ||
325 | rcu_read_lock(); | |
326 | switch (ctx->type) { | |
327 | case LTTNG_CONSUMER32_UST: | |
328 | case LTTNG_CONSUMER64_UST: | |
329 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
330 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
331 | ht->match_fct, &channel->key, &iter.iter, | |
332 | stream, node_channel_id.node) { | |
333 | ret = check_ust_stream(stream); | |
334 | if (ret < 0) { | |
335 | goto error_unlock; | |
336 | } | |
337 | } | |
338 | break; | |
339 | case LTTNG_CONSUMER_KERNEL: | |
340 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
341 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
342 | ht->match_fct, &channel->key, &iter.iter, | |
343 | stream, node_channel_id.node) { | |
344 | ret = check_kernel_stream(stream); | |
345 | if (ret < 0) { | |
346 | goto error_unlock; | |
347 | } | |
348 | } | |
349 | break; | |
350 | case LTTNG_CONSUMER_UNKNOWN: | |
351 | assert(0); | |
352 | break; | |
353 | } | |
354 | ||
355 | error_unlock: | |
356 | rcu_read_unlock(); | |
357 | ||
358 | error: | |
359 | return; | |
360 | } | |
361 | ||
2b8f8754 MD |
362 | static |
363 | void consumer_timer_signal_thread_qs(unsigned int signr) | |
364 | { | |
365 | sigset_t pending_set; | |
366 | int ret; | |
367 | ||
368 | /* | |
369 | * We need to be the only thread interacting with the thread | |
370 | * that manages signals for teardown synchronization. | |
371 | */ | |
372 | pthread_mutex_lock(&timer_signal.lock); | |
373 | ||
374 | /* Ensure we don't have any signal queued for this channel. */ | |
375 | for (;;) { | |
376 | ret = sigemptyset(&pending_set); | |
377 | if (ret == -1) { | |
378 | PERROR("sigemptyset"); | |
379 | } | |
380 | ret = sigpending(&pending_set); | |
381 | if (ret == -1) { | |
382 | PERROR("sigpending"); | |
383 | } | |
384 | if (!sigismember(&pending_set, LTTNG_CONSUMER_SIG_SWITCH)) { | |
385 | break; | |
386 | } | |
387 | caa_cpu_relax(); | |
388 | } | |
389 | ||
390 | /* | |
391 | * From this point, no new signal handler will be fired that would try to | |
392 | * access "chan". However, we still need to wait for any currently | |
393 | * executing handler to complete. | |
394 | */ | |
395 | cmm_smp_mb(); | |
396 | CMM_STORE_SHARED(timer_signal.qs_done, 0); | |
397 | cmm_smp_mb(); | |
398 | ||
399 | /* | |
400 | * Kill with LTTNG_CONSUMER_SIG_TEARDOWN, so signal management thread wakes | |
401 | * up. | |
402 | */ | |
403 | kill(getpid(), LTTNG_CONSUMER_SIG_TEARDOWN); | |
404 | ||
405 | while (!CMM_LOAD_SHARED(timer_signal.qs_done)) { | |
406 | caa_cpu_relax(); | |
407 | } | |
408 | cmm_smp_mb(); | |
409 | ||
410 | pthread_mutex_unlock(&timer_signal.lock); | |
411 | } | |
412 | ||
331744e3 JD |
413 | /* |
414 | * Set the timer for periodical metadata flush. | |
415 | */ | |
416 | void consumer_timer_switch_start(struct lttng_consumer_channel *channel, | |
417 | unsigned int switch_timer_interval) | |
418 | { | |
419 | int ret; | |
420 | struct sigevent sev; | |
421 | struct itimerspec its; | |
422 | ||
423 | assert(channel); | |
424 | assert(channel->key); | |
425 | ||
426 | if (switch_timer_interval == 0) { | |
427 | return; | |
428 | } | |
429 | ||
430 | sev.sigev_notify = SIGEV_SIGNAL; | |
431 | sev.sigev_signo = LTTNG_CONSUMER_SIG_SWITCH; | |
432 | sev.sigev_value.sival_ptr = channel; | |
433 | ret = timer_create(CLOCKID, &sev, &channel->switch_timer); | |
434 | if (ret == -1) { | |
435 | PERROR("timer_create"); | |
436 | } | |
437 | channel->switch_timer_enabled = 1; | |
438 | ||
439 | its.it_value.tv_sec = switch_timer_interval / 1000000; | |
69f60d21 | 440 | its.it_value.tv_nsec = (switch_timer_interval % 1000000) * 1000; |
331744e3 JD |
441 | its.it_interval.tv_sec = its.it_value.tv_sec; |
442 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
443 | ||
444 | ret = timer_settime(channel->switch_timer, 0, &its, NULL); | |
445 | if (ret == -1) { | |
446 | PERROR("timer_settime"); | |
447 | } | |
448 | } | |
449 | ||
450 | /* | |
451 | * Stop and delete timer. | |
452 | */ | |
453 | void consumer_timer_switch_stop(struct lttng_consumer_channel *channel) | |
454 | { | |
455 | int ret; | |
331744e3 JD |
456 | |
457 | assert(channel); | |
458 | ||
459 | ret = timer_delete(channel->switch_timer); | |
460 | if (ret == -1) { | |
461 | PERROR("timer_delete"); | |
462 | } | |
463 | ||
2b8f8754 | 464 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_SWITCH); |
331744e3 | 465 | |
2b8f8754 MD |
466 | channel->switch_timer = 0; |
467 | channel->switch_timer_enabled = 0; | |
331744e3 JD |
468 | } |
469 | ||
d3e2ba59 JD |
470 | /* |
471 | * Set the timer for the live mode. | |
472 | */ | |
473 | void consumer_timer_live_start(struct lttng_consumer_channel *channel, | |
474 | int live_timer_interval) | |
475 | { | |
476 | int ret; | |
477 | struct sigevent sev; | |
478 | struct itimerspec its; | |
479 | ||
480 | assert(channel); | |
481 | assert(channel->key); | |
482 | ||
fac41e72 | 483 | if (live_timer_interval <= 0) { |
d3e2ba59 JD |
484 | return; |
485 | } | |
486 | ||
487 | sev.sigev_notify = SIGEV_SIGNAL; | |
488 | sev.sigev_signo = LTTNG_CONSUMER_SIG_LIVE; | |
489 | sev.sigev_value.sival_ptr = channel; | |
490 | ret = timer_create(CLOCKID, &sev, &channel->live_timer); | |
491 | if (ret == -1) { | |
492 | PERROR("timer_create"); | |
493 | } | |
494 | channel->live_timer_enabled = 1; | |
495 | ||
496 | its.it_value.tv_sec = live_timer_interval / 1000000; | |
69f60d21 | 497 | its.it_value.tv_nsec = (live_timer_interval % 1000000) * 1000; |
d3e2ba59 JD |
498 | its.it_interval.tv_sec = its.it_value.tv_sec; |
499 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
500 | ||
501 | ret = timer_settime(channel->live_timer, 0, &its, NULL); | |
502 | if (ret == -1) { | |
503 | PERROR("timer_settime"); | |
504 | } | |
505 | } | |
506 | ||
507 | /* | |
508 | * Stop and delete timer. | |
509 | */ | |
510 | void consumer_timer_live_stop(struct lttng_consumer_channel *channel) | |
511 | { | |
512 | int ret; | |
513 | ||
514 | assert(channel); | |
515 | ||
516 | ret = timer_delete(channel->live_timer); | |
517 | if (ret == -1) { | |
518 | PERROR("timer_delete"); | |
519 | } | |
520 | ||
521 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_LIVE); | |
522 | ||
523 | channel->live_timer = 0; | |
524 | channel->live_timer_enabled = 0; | |
525 | } | |
526 | ||
331744e3 JD |
527 | /* |
528 | * Block the RT signals for the entire process. It must be called from the | |
529 | * consumer main before creating the threads | |
530 | */ | |
73664f81 | 531 | int consumer_signal_init(void) |
331744e3 JD |
532 | { |
533 | int ret; | |
534 | sigset_t mask; | |
535 | ||
536 | /* Block signal for entire process, so only our thread processes it. */ | |
537 | setmask(&mask); | |
538 | ret = pthread_sigmask(SIG_BLOCK, &mask, NULL); | |
539 | if (ret) { | |
540 | errno = ret; | |
541 | PERROR("pthread_sigmask"); | |
73664f81 | 542 | return -1; |
331744e3 | 543 | } |
73664f81 | 544 | return 0; |
331744e3 JD |
545 | } |
546 | ||
547 | /* | |
d3e2ba59 JD |
548 | * This thread is the sighandler for signals LTTNG_CONSUMER_SIG_SWITCH, |
549 | * LTTNG_CONSUMER_SIG_TEARDOWN and LTTNG_CONSUMER_SIG_LIVE. | |
331744e3 | 550 | */ |
d3e2ba59 | 551 | void *consumer_timer_thread(void *data) |
331744e3 JD |
552 | { |
553 | int signr; | |
554 | sigset_t mask; | |
555 | siginfo_t info; | |
556 | struct lttng_consumer_local_data *ctx = data; | |
557 | ||
8a9acb74 MD |
558 | rcu_register_thread(); |
559 | ||
1fc79fb4 MD |
560 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA_TIMER); |
561 | ||
2d57de81 MD |
562 | if (testpoint(consumerd_thread_metadata_timer)) { |
563 | goto error_testpoint; | |
564 | } | |
565 | ||
9ce5646a MD |
566 | health_code_update(); |
567 | ||
331744e3 JD |
568 | /* Only self thread will receive signal mask. */ |
569 | setmask(&mask); | |
570 | CMM_STORE_SHARED(timer_signal.tid, pthread_self()); | |
571 | ||
572 | while (1) { | |
9ce5646a MD |
573 | health_code_update(); |
574 | ||
575 | health_poll_entry(); | |
331744e3 | 576 | signr = sigwaitinfo(&mask, &info); |
9ce5646a | 577 | health_poll_exit(); |
331744e3 JD |
578 | if (signr == -1) { |
579 | if (errno != EINTR) { | |
580 | PERROR("sigwaitinfo"); | |
581 | } | |
582 | continue; | |
583 | } else if (signr == LTTNG_CONSUMER_SIG_SWITCH) { | |
584 | metadata_switch_timer(ctx, info.si_signo, &info, NULL); | |
585 | } else if (signr == LTTNG_CONSUMER_SIG_TEARDOWN) { | |
586 | cmm_smp_mb(); | |
587 | CMM_STORE_SHARED(timer_signal.qs_done, 1); | |
588 | cmm_smp_mb(); | |
589 | DBG("Signal timer metadata thread teardown"); | |
d3e2ba59 JD |
590 | } else if (signr == LTTNG_CONSUMER_SIG_LIVE) { |
591 | live_timer(ctx, info.si_signo, &info, NULL); | |
331744e3 JD |
592 | } else { |
593 | ERR("Unexpected signal %d\n", info.si_signo); | |
594 | } | |
595 | } | |
596 | ||
2d57de81 MD |
597 | error_testpoint: |
598 | /* Only reached in testpoint error */ | |
599 | health_error(); | |
1fc79fb4 MD |
600 | health_unregister(health_consumerd); |
601 | ||
8a9acb74 MD |
602 | rcu_unregister_thread(); |
603 | ||
1fc79fb4 | 604 | /* Never return */ |
331744e3 JD |
605 | return NULL; |
606 | } |