Implement consumer ring buffer position sampling
[lttng-tools.git] / src / bin / lttng-consumerd / lttng-consumerd.c
CommitLineData
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JD
1/*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
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AM
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
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8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
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14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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17 */
18
6c1c0768 19#define _LGPL_SOURCE
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20#include <fcntl.h>
21#include <getopt.h>
22#include <grp.h>
23#include <limits.h>
24#include <pthread.h>
25#include <signal.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <sys/ipc.h>
1ccfc0e3 30#include <sys/resource.h>
d4a1283e
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31#include <sys/shm.h>
32#include <sys/socket.h>
33#include <sys/stat.h>
34#include <sys/types.h>
35#include <urcu/list.h>
36#include <poll.h>
37#include <unistd.h>
03424a9b 38#include <sys/mman.h>
5348b470 39#include <assert.h>
7753dea8 40#include <urcu/compiler.h>
1ccfc0e3 41#include <ulimit.h>
d4a1283e 42
db758600
DG
43#include <common/defaults.h>
44#include <common/common.h>
c8fea79c
JR
45#include <common/consumer/consumer.h>
46#include <common/consumer/consumer-timer.h>
fb3a43a9 47#include <common/compat/poll.h>
e8fa9fb0 48#include <common/compat/getenv.h>
10a8a223 49#include <common/sessiond-comm/sessiond-comm.h>
5c635c72 50#include <common/utils.h>
10a8a223
DG
51
52#include "lttng-consumerd.h"
1fc79fb4 53#include "health-consumerd.h"
d4a1283e 54
d8ef542d 55/* threads (channel handling, poll, metadata, sessiond) */
331744e3 56
5c635c72
MD
57static pthread_t channel_thread, data_thread, metadata_thread,
58 sessiond_thread, metadata_timer_thread, health_thread;
d4a1283e 59
3183dbb0 60/* to count the number of times the user pressed ctrl+c */
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JD
61static int sigintcount = 0;
62
d4a1283e 63/* Argument variables */
97e19046
DG
64int lttng_opt_quiet; /* not static in error.h */
65int lttng_opt_verbose; /* not static in error.h */
c7e35b03
JR
66int lttng_opt_mi; /* not static in error.h */
67
d4a1283e
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68static int opt_daemon;
69static const char *progname;
6533b585
DG
70static char command_sock_path[PATH_MAX]; /* Global command socket path */
71static char error_sock_path[PATH_MAX]; /* Global error path */
3bd1e081 72static enum lttng_consumer_type opt_type = LTTNG_CONSUMER_KERNEL;
d4a1283e 73
7753dea8 74/* the liblttngconsumerd context */
3bd1e081 75static struct lttng_consumer_local_data *ctx;
cb040cc1 76
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MD
77/* Consumerd health monitoring */
78struct health_app *health_consumerd;
79
6c71277b
MD
80const char *tracing_group_name = DEFAULT_TRACING_GROUP;
81
748b7b07
MD
82int lttng_consumer_ready = NR_LTTNG_CONSUMER_READY;
83
5c635c72
MD
84enum lttng_consumer_type lttng_consumer_get_type(void)
85{
86 if (!ctx) {
87 return LTTNG_CONSUMER_UNKNOWN;
88 }
89 return ctx->type;
90}
91
d4a1283e 92/*
6533b585 93 * Signal handler for the daemon
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94 */
95static void sighandler(int sig)
96{
13e44745
JD
97 if (sig == SIGINT && sigintcount++ == 0) {
98 DBG("ignoring first SIGINT");
99 return;
100 }
101
6a0caa9b
MD
102 if (ctx) {
103 lttng_consumer_should_exit(ctx);
104 }
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105}
106
107/*
6533b585 108 * Setup signal handler for :
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109 * SIGINT, SIGTERM, SIGPIPE
110 */
111static int set_signal_handler(void)
112{
113 int ret = 0;
114 struct sigaction sa;
115 sigset_t sigset;
116
117 if ((ret = sigemptyset(&sigset)) < 0) {
8fdf2d4d 118 PERROR("sigemptyset");
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119 return ret;
120 }
121
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122 sa.sa_mask = sigset;
123 sa.sa_flags = 0;
0072e5e2
MD
124
125 sa.sa_handler = sighandler;
d4a1283e 126 if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
8fdf2d4d 127 PERROR("sigaction");
d4a1283e
JD
128 return ret;
129 }
130
131 if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
8fdf2d4d 132 PERROR("sigaction");
d4a1283e
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133 return ret;
134 }
135
0072e5e2 136 sa.sa_handler = SIG_IGN;
d4a1283e 137 if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
8fdf2d4d 138 PERROR("sigaction");
d4a1283e
JD
139 return ret;
140 }
141
142 return ret;
143}
144
d4a1283e 145/*
3183dbb0 146 * Usage function on stream file.
d4a1283e 147 */
3183dbb0 148static void usage(FILE *fp)
d4a1283e 149{
3183dbb0
DG
150 fprintf(fp, "Usage: %s OPTIONS\n\nOptions:\n", progname);
151 fprintf(fp, " -h, --help "
d4a1283e 152 "Display this usage.\n");
6c71277b 153 fprintf(fp, " -c, --consumerd-cmd-sock PATH "
d4a1283e 154 "Specify path for the command socket\n");
6c71277b 155 fprintf(fp, " -e, --consumerd-err-sock PATH "
d4a1283e 156 "Specify path for the error socket\n");
3183dbb0 157 fprintf(fp, " -d, --daemonize "
d4a1283e 158 "Start as a daemon.\n");
3183dbb0 159 fprintf(fp, " -q, --quiet "
d4a1283e 160 "No output at all.\n");
3183dbb0 161 fprintf(fp, " -v, --verbose "
d4a1283e 162 "Verbose mode. Activate DBG() macro.\n");
3183dbb0 163 fprintf(fp, " -V, --version "
d4a1283e 164 "Show version number.\n");
6c71277b
MD
165 fprintf(fp, " -g, --group NAME "
166 "Specify the tracing group name. (default: tracing)\n");
3183dbb0 167 fprintf(fp, " -k, --kernel "
3bd1e081 168 "Consumer kernel buffers (default).\n");
3183dbb0 169 fprintf(fp, " -u, --ust "
3bd1e081 170 "Consumer UST buffers.%s\n",
74d0b642 171#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081
MD
172 ""
173#else
174 " (support not compiled in)"
175#endif
176 );
d4a1283e
JD
177}
178
179/*
180 * daemon argument parsing
181 */
8f7a281b 182static int parse_args(int argc, char **argv)
d4a1283e 183{
8f7a281b 184 int c, ret = 0;
d4a1283e
JD
185
186 static struct option long_options[] = {
7753dea8
MD
187 { "consumerd-cmd-sock", 1, 0, 'c' },
188 { "consumerd-err-sock", 1, 0, 'e' },
d4a1283e 189 { "daemonize", 0, 0, 'd' },
6c71277b 190 { "group", 1, 0, 'g' },
d4a1283e
JD
191 { "help", 0, 0, 'h' },
192 { "quiet", 0, 0, 'q' },
193 { "verbose", 0, 0, 'v' },
194 { "version", 0, 0, 'V' },
3bd1e081 195 { "kernel", 0, 0, 'k' },
74d0b642 196#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081
MD
197 { "ust", 0, 0, 'u' },
198#endif
d4a1283e
JD
199 { NULL, 0, 0, 0 }
200 };
201
202 while (1) {
203 int option_index = 0;
5acdb082
MD
204 c = getopt_long(argc, argv, "dhqvVku" "c:e:g:",
205 long_options, &option_index);
d4a1283e
JD
206 if (c == -1) {
207 break;
208 }
209
210 switch (c) {
914a571b 211 case 0:
5acdb082
MD
212 fprintf(stderr, "option %s",
213 long_options[option_index].name);
914a571b
JD
214 if (optarg) {
215 fprintf(stderr, " with arg %s\n", optarg);
8f7a281b
MD
216 ret = -1;
217 goto end;
914a571b
JD
218 }
219 break;
220 case 'c':
e8fa9fb0
MD
221 if (lttng_is_setuid_setgid()) {
222 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
223 "-c, --consumerd-cmd-sock");
224 } else {
225 snprintf(command_sock_path, PATH_MAX, "%s", optarg);
226 }
914a571b
JD
227 break;
228 case 'e':
e8fa9fb0
MD
229 if (lttng_is_setuid_setgid()) {
230 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
231 "-e, --consumerd-err-sock");
232 } else {
233 snprintf(error_sock_path, PATH_MAX, "%s", optarg);
234 }
914a571b
JD
235 break;
236 case 'd':
237 opt_daemon = 1;
238 break;
6c71277b 239 case 'g':
e8fa9fb0
MD
240 if (lttng_is_setuid_setgid()) {
241 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
242 "-g, --group");
243 } else {
244 tracing_group_name = optarg;
245 }
6c71277b 246 break;
914a571b 247 case 'h':
3183dbb0
DG
248 usage(stdout);
249 exit(EXIT_SUCCESS);
914a571b 250 case 'q':
97e19046 251 lttng_opt_quiet = 1;
914a571b
JD
252 break;
253 case 'v':
97e19046 254 lttng_opt_verbose = 1;
914a571b
JD
255 break;
256 case 'V':
257 fprintf(stdout, "%s\n", VERSION);
258 exit(EXIT_SUCCESS);
3bd1e081
MD
259 case 'k':
260 opt_type = LTTNG_CONSUMER_KERNEL;
261 break;
74d0b642 262#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 263 case 'u':
7753dea8
MD
264# if (CAA_BITS_PER_LONG == 64)
265 opt_type = LTTNG_CONSUMER64_UST;
266# elif (CAA_BITS_PER_LONG == 32)
267 opt_type = LTTNG_CONSUMER32_UST;
268# else
269# error "Unknown bitness"
270# endif
3bd1e081
MD
271 break;
272#endif
914a571b 273 default:
3183dbb0 274 usage(stderr);
8f7a281b
MD
275 ret = -1;
276 goto end;
d4a1283e
JD
277 }
278 }
8f7a281b
MD
279end:
280 return ret;
d4a1283e
JD
281}
282
1ccfc0e3
DG
283/*
284 * Set open files limit to unlimited. This daemon can open a large number of
285 * file descriptors in order to consumer multiple kernel traces.
286 */
287static void set_ulimit(void)
288{
289 int ret;
290 struct rlimit lim;
291
292 /* The kernel does not allowed an infinite limit for open files */
293 lim.rlim_cur = 65535;
294 lim.rlim_max = 65535;
295
296 ret = setrlimit(RLIMIT_NOFILE, &lim);
297 if (ret < 0) {
298 PERROR("failed to set open files limit");
299 }
300}
301
d4a1283e
JD
302/*
303 * main
304 */
305int main(int argc, char **argv)
306{
72f11bd7 307 int ret = 0, retval = 0;
d4a1283e 308 void *status;
6a0caa9b 309 struct lttng_consumer_local_data *tmp_ctx;
d4a1283e 310
fe19a07a
MD
311 rcu_register_thread();
312
72f11bd7
MD
313 if (set_signal_handler()) {
314 retval = -1;
315 goto exit_set_signal_handler;
316 }
317
d4a1283e
JD
318 /* Parse arguments */
319 progname = argv[0];
72f11bd7
MD
320 if (parse_args(argc, argv)) {
321 retval = -1;
322 goto exit_options;
323 }
d4a1283e
JD
324
325 /* Daemonize */
326 if (opt_daemon) {
ceed52b5
MD
327 int i;
328
329 /*
330 * fork
331 * child: setsid, close FD 0, 1, 2, chdir /
332 * parent: exit (if fork is successful)
333 */
d4a1283e
JD
334 ret = daemon(0, 0);
335 if (ret < 0) {
ceed52b5 336 PERROR("daemon");
72f11bd7
MD
337 retval = -1;
338 goto exit_options;
d4a1283e 339 }
ceed52b5
MD
340 /*
341 * We are in the child. Make sure all other file
342 * descriptors are closed, in case we are called with
343 * more opened file descriptors than the standard ones.
344 */
345 for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
346 (void) close(i);
347 }
d4a1283e
JD
348 }
349
72f11bd7
MD
350 /*
351 * Starting from here, we can create threads. This needs to be after
352 * lttng_daemonize due to RCU.
353 */
354
355 health_consumerd = health_app_create(NR_HEALTH_CONSUMERD_TYPES);
356 if (!health_consumerd) {
357 retval = -1;
358 goto exit_health_consumerd_cleanup;
359 }
360
9d035200 361 if (*command_sock_path == '\0') {
7753dea8
MD
362 switch (opt_type) {
363 case LTTNG_CONSUMER_KERNEL:
72f11bd7
MD
364 ret = snprintf(command_sock_path, PATH_MAX,
365 DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
990570ed 366 DEFAULT_LTTNG_RUNDIR);
72f11bd7
MD
367 if (ret < 0) {
368 retval = -1;
369 goto exit_init_data;
370 }
7753dea8
MD
371 break;
372 case LTTNG_CONSUMER64_UST:
72f11bd7
MD
373 ret = snprintf(command_sock_path, PATH_MAX,
374 DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
375 DEFAULT_LTTNG_RUNDIR);
376 if (ret < 0) {
377 retval = -1;
378 goto exit_init_data;
379 }
7753dea8
MD
380 break;
381 case LTTNG_CONSUMER32_UST:
72f11bd7
MD
382 ret = snprintf(command_sock_path, PATH_MAX,
383 DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
384 DEFAULT_LTTNG_RUNDIR);
385 if (ret < 0) {
386 retval = -1;
387 goto exit_init_data;
388 }
7753dea8
MD
389 break;
390 default:
72f11bd7
MD
391 ERR("Unknown consumerd type");
392 retval = -1;
393 goto exit_init_data;
7753dea8 394 }
d4a1283e 395 }
e4421fec
DG
396
397 /* Init */
72f11bd7
MD
398 if (lttng_consumer_init()) {
399 retval = -1;
400 goto exit_init_data;
282dadbc
MD
401 }
402
72f11bd7 403 /* Initialize communication library */
e98ec547 404 lttcomm_init();
72f11bd7 405 /* Initialize TCP timeout values */
e98ec547 406 lttcomm_inet_init();
e4421fec 407
1ccfc0e3
DG
408 if (!getuid()) {
409 /* Set limit for open files */
410 set_ulimit();
411 }
412
7567352f
MD
413 if (run_as_create_worker(argv[0]) < 0) {
414 goto exit_init_data;
415 }
416
5348b470 417 /* create the consumer instance with and assign the callbacks */
d41f73b7
MD
418 ctx = lttng_consumer_create(opt_type, lttng_consumer_read_subbuffer,
419 NULL, lttng_consumer_on_recv_stream, NULL);
72f11bd7
MD
420 if (!ctx) {
421 retval = -1;
422 goto exit_init_data;
cb040cc1
JD
423 }
424
3bd1e081 425 lttng_consumer_set_command_sock_path(ctx, command_sock_path);
9d035200 426 if (*error_sock_path == '\0') {
7753dea8
MD
427 switch (opt_type) {
428 case LTTNG_CONSUMER_KERNEL:
72f11bd7
MD
429 ret = snprintf(error_sock_path, PATH_MAX,
430 DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
990570ed 431 DEFAULT_LTTNG_RUNDIR);
72f11bd7
MD
432 if (ret < 0) {
433 retval = -1;
434 goto exit_init_data;
435 }
7753dea8
MD
436 break;
437 case LTTNG_CONSUMER64_UST:
72f11bd7
MD
438 ret = snprintf(error_sock_path, PATH_MAX,
439 DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
440 DEFAULT_LTTNG_RUNDIR);
441 if (ret < 0) {
442 retval = -1;
443 goto exit_init_data;
444 }
7753dea8
MD
445 break;
446 case LTTNG_CONSUMER32_UST:
72f11bd7
MD
447 ret = snprintf(error_sock_path, PATH_MAX,
448 DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
449 DEFAULT_LTTNG_RUNDIR);
450 if (ret < 0) {
451 retval = -1;
452 goto exit_init_data;
453 }
7753dea8
MD
454 break;
455 default:
72f11bd7
MD
456 ERR("Unknown consumerd type");
457 retval = -1;
458 goto exit_init_data;
7753dea8 459 }
d4a1283e
JD
460 }
461
32258573 462 /* Connect to the socket created by lttng-sessiond to report errors */
d4a1283e 463 DBG("Connecting to error socket %s", error_sock_path);
1ce86c9a 464 ret = lttcomm_connect_unix_sock(error_sock_path);
72f11bd7
MD
465 /*
466 * Not a fatal error, but all communication with lttng-sessiond will
467 * fail.
468 */
1ce86c9a 469 if (ret < 0) {
99bab54f 470 WARN("Cannot connect to error socket (is lttng-sessiond started?)");
d4a1283e 471 }
3bd1e081 472 lttng_consumer_set_error_sock(ctx, ret);
d4a1283e 473
331744e3 474 /*
d3e2ba59
JD
475 * Block RT signals used for UST periodical metadata flush and the live
476 * timer in main, and create a dedicated thread to handle these signals.
331744e3 477 */
72f11bd7
MD
478 if (consumer_signal_init()) {
479 retval = -1;
480 goto exit_init_data;
481 }
d3e2ba59 482
331744e3
JD
483 ctx->type = opt_type;
484
72f11bd7
MD
485 if (utils_create_pipe(health_quit_pipe)) {
486 retval = -1;
487 goto exit_health_pipe;
5c635c72
MD
488 }
489
490 /* Create thread to manage the client socket */
1a1a34b4 491 ret = pthread_create(&health_thread, default_pthread_attr(),
5c635c72 492 thread_manage_health, (void *) NULL);
72f11bd7
MD
493 if (ret) {
494 errno = ret;
5c635c72 495 PERROR("pthread_create health");
72f11bd7
MD
496 retval = -1;
497 goto exit_health_thread;
5c635c72
MD
498 }
499
748b7b07
MD
500 /*
501 * Wait for health thread to be initialized before letting the
502 * sessiond thread reply to the sessiond that we are ready.
503 */
504 while (uatomic_read(&lttng_consumer_ready)) {
1f3130d5 505 usleep(100000);
748b7b07
MD
506 }
507 cmm_smp_mb(); /* Read ready before following operations */
508
d8ef542d 509 /* Create thread to manage channels */
1a1a34b4 510 ret = pthread_create(&channel_thread, default_pthread_attr(),
72f11bd7 511 consumer_thread_channel_poll,
d8ef542d 512 (void *) ctx);
72f11bd7
MD
513 if (ret) {
514 errno = ret;
515 PERROR("pthread_create");
516 retval = -1;
517 goto exit_channel_thread;
d8ef542d
MD
518 }
519
7d980def 520 /* Create thread to manage the polling/writing of trace metadata */
1a1a34b4 521 ret = pthread_create(&metadata_thread, default_pthread_attr(),
72f11bd7 522 consumer_thread_metadata_poll,
7d980def 523 (void *) ctx);
72f11bd7
MD
524 if (ret) {
525 errno = ret;
526 PERROR("pthread_create");
527 retval = -1;
528 goto exit_metadata_thread;
7d980def
DG
529 }
530
531 /* Create thread to manage the polling/writing of trace data */
1a1a34b4
MJ
532 ret = pthread_create(&data_thread, default_pthread_attr(),
533 consumer_thread_data_poll, (void *) ctx);
72f11bd7
MD
534 if (ret) {
535 errno = ret;
536 PERROR("pthread_create");
537 retval = -1;
538 goto exit_data_thread;
d4a1283e
JD
539 }
540
7b336484 541 /* Create the thread to manage the reception of fds */
1a1a34b4 542 ret = pthread_create(&sessiond_thread, default_pthread_attr(),
72f11bd7 543 consumer_thread_sessiond_poll,
cb040cc1 544 (void *) ctx);
72f11bd7
MD
545 if (ret) {
546 errno = ret;
547 PERROR("pthread_create");
548 retval = -1;
549 goto exit_sessiond_thread;
df27ef7b
DG
550 }
551
d3e2ba59
JD
552 /*
553 * Create the thread to manage the UST metadata periodic timer and
554 * live timer.
555 */
1a1a34b4 556 ret = pthread_create(&metadata_timer_thread, default_pthread_attr(),
d3e2ba59 557 consumer_timer_thread, (void *) ctx);
72f11bd7
MD
558 if (ret) {
559 errno = ret;
560 PERROR("pthread_create");
561 retval = -1;
562 goto exit_metadata_timer_thread;
d3e2ba59 563 }
331744e3 564
d3e2ba59
JD
565 ret = pthread_detach(metadata_timer_thread);
566 if (ret) {
567 errno = ret;
72f11bd7
MD
568 PERROR("pthread_detach");
569 retval = -1;
570 goto exit_metadata_timer_detach;
331744e3
JD
571 }
572
72f11bd7
MD
573 /*
574 * This is where we start awaiting program completion (e.g. through
575 * signal that asks threads to teardown.
576 */
577
578exit_metadata_timer_detach:
579exit_metadata_timer_thread:
df27ef7b 580 ret = pthread_join(sessiond_thread, &status);
72f11bd7
MD
581 if (ret) {
582 errno = ret;
583 PERROR("pthread_join sessiond_thread");
584 retval = -1;
d4a1283e 585 }
e9404c27
JG
586
587 ret = consumer_timer_thread_get_channel_monitor_pipe();
588 if (ret >= 0) {
589 ret = close(ret);
590 if (ret) {
591 PERROR("close channel monitor pipe");
592 }
593 }
72f11bd7 594exit_sessiond_thread:
d4a1283e 595
df27ef7b 596 ret = pthread_join(data_thread, &status);
72f11bd7
MD
597 if (ret) {
598 errno = ret;
599 PERROR("pthread_join data_thread");
600 retval = -1;
df27ef7b 601 }
72f11bd7 602exit_data_thread:
df27ef7b 603
df27ef7b 604 ret = pthread_join(metadata_thread, &status);
72f11bd7
MD
605 if (ret) {
606 errno = ret;
607 PERROR("pthread_join metadata_thread");
608 retval = -1;
df27ef7b 609 }
72f11bd7 610exit_metadata_thread:
df27ef7b 611
d8ef542d 612 ret = pthread_join(channel_thread, &status);
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MD
613 if (ret) {
614 errno = ret;
615 PERROR("pthread_join channel_thread");
616 retval = -1;
d8ef542d 617 }
72f11bd7 618exit_channel_thread:
d8ef542d 619
5c635c72 620 ret = pthread_join(health_thread, &status);
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621 if (ret) {
622 errno = ret;
623 PERROR("pthread_join health_thread");
624 retval = -1;
5c635c72 625 }
72f11bd7 626exit_health_thread:
5c635c72 627
5c635c72 628 utils_close_pipe(health_quit_pipe);
72f11bd7 629exit_health_pipe:
5c635c72 630
72f11bd7 631exit_init_data:
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MD
632 tmp_ctx = ctx;
633 ctx = NULL;
634 cmm_barrier(); /* Clear ctx for signal handler. */
4d62fbf8
MD
635 /*
636 * Wait for all pending call_rcu work to complete before tearing
637 * down data structures. call_rcu worker may be trying to
638 * perform lookups in those structures.
639 */
640 rcu_barrier();
6a0caa9b 641 lttng_consumer_destroy(tmp_ctx);
3bd1e081 642 lttng_consumer_cleanup();
72f11bd7 643
1fc79fb4
MD
644 if (health_consumerd) {
645 health_app_destroy(health_consumerd);
646 }
38303ec8
JG
647 /* Ensure all prior call_rcu are done. */
648 rcu_barrier();
d4a1283e 649
38303ec8 650 run_as_destroy_worker();
72f11bd7 651
38303ec8
JG
652exit_health_consumerd_cleanup:
653exit_options:
72f11bd7 654exit_set_signal_handler:
6bf8b7f3 655
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656 rcu_unregister_thread();
657
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658 if (!retval) {
659 exit(EXIT_SUCCESS);
660 } else {
661 exit(EXIT_FAILURE);
662 }
d4a1283e 663}
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