Tests fix: Missing waitpid in fork test
[lttng-tools.git] / src / bin / lttng-sessiond / trace-ust.c
CommitLineData
97ee3a89
DG
1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
d14d33bf
AM
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
97ee3a89 7 *
d14d33bf
AM
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
97ee3a89 12 *
d14d33bf
AM
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
97ee3a89
DG
16 */
17
18#define _GNU_SOURCE
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <unistd.h>
d9bf3ca4 23#include <inttypes.h>
97ee3a89 24
990570ed
DG
25#include <common/common.h>
26#include <common/defaults.h>
97ee3a89 27
7972aab2 28#include "buffer-registry.h"
97ee3a89 29#include "trace-ust.h"
0b2dc8df 30#include "utils.h"
97ee3a89 31
025faf73
DG
32/*
33 * Match function for the events hash table lookup.
34 *
35 * Matches by name only. Used by the disable command.
36 */
18eace3b
DG
37int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
38 const void *_key)
39{
40 struct ltt_ust_event *event;
41 const char *name;
42
43 assert(node);
44 assert(_key);
45
46 event = caa_container_of(node, struct ltt_ust_event, node.node);
47 name = _key;
48
49 /* Event name */
50 if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) {
51 goto no_match;
52 }
53
025faf73 54 /* Match */
18eace3b
DG
55 return 1;
56
57no_match:
58 return 0;
59}
60
025faf73
DG
61/*
62 * Match function for the hash table lookup.
63 *
64 * It matches an ust event based on three attributes which are the event name,
65 * the filter bytecode and the loglevel.
66 */
18eace3b
DG
67int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key)
68{
69 struct ltt_ust_event *event;
70 const struct ltt_ust_ht_key *key;
71
72 assert(node);
73 assert(_key);
74
75 event = caa_container_of(node, struct ltt_ust_event, node.node);
76 key = _key;
77
f19e9f8b 78 /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */
18eace3b
DG
79
80 /* Event name */
81 if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) {
18eace3b
DG
82 goto no_match;
83 }
84
85 /* Event loglevel. */
86 if (event->attr.loglevel != key->loglevel) {
025faf73
DG
87 if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL
88 && key->loglevel == 0 && event->attr.loglevel == -1) {
18eace3b 89 /*
025faf73
DG
90 * Match is accepted. This is because on event creation, the
91 * loglevel is set to -1 if the event loglevel type is ALL so 0 and
92 * -1 are accepted for this loglevel type since 0 is the one set by
93 * the API when receiving an enable event.
18eace3b
DG
94 */
95 } else {
18eace3b
DG
96 goto no_match;
97 }
98 }
99
100 /* Only one of the filters is NULL, fail. */
101 if ((key->filter && !event->filter) || (!key->filter && event->filter)) {
18eace3b
DG
102 goto no_match;
103 }
104
025faf73
DG
105 if (key->filter && event->filter) {
106 /* Both filters exists, check length followed by the bytecode. */
107 if (event->filter->len != key->filter->len ||
108 memcmp(event->filter->data, key->filter->data,
109 event->filter->len) != 0) {
110 goto no_match;
111 }
18eace3b
DG
112 }
113
f19e9f8b
JI
114 /* If only one of the exclusions is NULL, fail. */
115 if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) {
116 goto no_match;
117 }
118
119 if (key->exclusion && event->exclusion) {
120 /* Both exclusions exist; check count followed by names. */
121 if (event->exclusion->count != key->exclusion->count ||
122 memcmp(event->exclusion->names, key->exclusion->names,
123 event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) {
124 goto no_match;
125 }
126 }
025faf73
DG
127 /* Match. */
128 return 1;
18eace3b
DG
129
130no_match:
131 return 0;
18eace3b
DG
132}
133
0177d773 134/*
2223c96f
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135 * Find the channel in the hashtable and return channel pointer. RCU read side
136 * lock MUST be acquired before calling this.
0177d773 137 */
bec39940 138struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
f6a9efaa 139 char *name)
0177d773 140{
bec39940
DG
141 struct lttng_ht_node_str *node;
142 struct lttng_ht_iter iter;
0177d773 143
85076754
MD
144 /*
145 * If we receive an empty string for channel name, it means the
146 * default channel name is requested.
147 */
148 if (name[0] == '\0')
149 name = DEFAULT_CHANNEL_NAME;
150
bec39940
DG
151 lttng_ht_lookup(ht, (void *)name, &iter);
152 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 153 if (node == NULL) {
44d3bd01
DG
154 goto error;
155 }
156
f6a9efaa 157 DBG2("Trace UST channel %s found by name", name);
0177d773 158
f6a9efaa 159 return caa_container_of(node, struct ltt_ust_channel, node);
97ee3a89
DG
160
161error:
f6a9efaa 162 DBG2("Trace UST channel %s not found by name", name);
97ee3a89
DG
163 return NULL;
164}
165
166/*
2223c96f
DG
167 * Find the event in the hashtable and return event pointer. RCU read side lock
168 * MUST be acquired before calling this.
97ee3a89 169 */
18eace3b 170struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
10646003
JI
171 char *name, struct lttng_filter_bytecode *filter, int loglevel,
172 struct lttng_event_exclusion *exclusion)
97ee3a89 173{
bec39940
DG
174 struct lttng_ht_node_str *node;
175 struct lttng_ht_iter iter;
18eace3b 176 struct ltt_ust_ht_key key;
97ee3a89 177
18eace3b
DG
178 assert(name);
179 assert(ht);
180
181 key.name = name;
182 key.filter = filter;
183 key.loglevel = loglevel;
10646003 184 key.exclusion = exclusion;
18eace3b 185
18eace3b
DG
186 cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
187 trace_ust_ht_match_event, &key, &iter.iter);
bec39940 188 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 189 if (node == NULL) {
97ee3a89
DG
190 goto error;
191 }
192
18eace3b 193 DBG2("Trace UST event %s found", key.name);
f6a9efaa
DG
194
195 return caa_container_of(node, struct ltt_ust_event, node);
97ee3a89
DG
196
197error:
18eace3b 198 DBG2("Trace UST event %s NOT found", key.name);
97ee3a89
DG
199 return NULL;
200}
201
202/*
203 * Allocate and initialize a ust session data structure.
204 *
205 * Return pointer to structure or NULL.
206 */
d9bf3ca4 207struct ltt_ust_session *trace_ust_create_session(uint64_t session_id)
97ee3a89 208{
0475c50c 209 int ret;
97ee3a89
DG
210 struct ltt_ust_session *lus;
211
212 /* Allocate a new ltt ust session */
ba7f0ae5 213 lus = zmalloc(sizeof(struct ltt_ust_session));
97ee3a89 214 if (lus == NULL) {
ba7f0ae5 215 PERROR("create ust session zmalloc");
97ee3a89
DG
216 goto error;
217 }
218
219 /* Init data structure */
a991f516 220 lus->id = session_id;
36dc12cc 221 lus->start_trace = 0;
97ee3a89 222
7972aab2
DG
223 /*
224 * Default buffer type. This can be changed through an enable channel
225 * requesting a different type. Note that this can only be changed once
226 * during the session lifetime which is at the first enable channel and
227 * only before start. The flag buffer_type_changed indicates the status.
228 */
8692d4e5 229 lus->buffer_type = LTTNG_BUFFER_PER_UID;
7972aab2
DG
230 /* Once set to 1, the buffer_type is immutable for the session. */
231 lus->buffer_type_changed = 0;
232 /* Init it in case it get used after allocation. */
233 CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list);
f6a9efaa
DG
234
235 /* Alloc UST global domain channels' HT */
bec39940 236 lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
0475c50c
DG
237 ret = jul_init_domain(&lus->domain_jul);
238 if (ret < 0) {
239 goto error_consumer;
240 }
44d3bd01 241
00e2e675
DG
242 lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
243 if (lus->consumer == NULL) {
09a90bcd 244 goto error_consumer;
00e2e675
DG
245 }
246
247 /*
248 * The tmp_consumer stays NULL until a set_consumer_uri command is
249 * executed. At this point, the consumer should be nullify until an
250 * enable_consumer command. This assignment is symbolic since we've zmalloc
251 * the struct.
252 */
253 lus->tmp_consumer = NULL;
254
44d3bd01
DG
255 DBG2("UST trace session create successful");
256
97ee3a89
DG
257 return lus;
258
09a90bcd 259error_consumer:
0b2dc8df 260 ht_cleanup_push(lus->domain_global.channels);
0475c50c 261 jul_destroy_domain(&lus->domain_jul);
44844c29 262 free(lus);
97ee3a89
DG
263error:
264 return NULL;
265}
266
267/*
268 * Allocate and initialize a ust channel data structure.
269 *
270 * Return pointer to structure or NULL.
271 */
dec56f6c 272struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan)
97ee3a89 273{
97ee3a89
DG
274 struct ltt_ust_channel *luc;
275
0525e9ae 276 assert(chan);
0525e9ae 277
37357452 278 luc = zmalloc(sizeof(struct ltt_ust_channel));
97ee3a89 279 if (luc == NULL) {
df0f840b 280 PERROR("ltt_ust_channel zmalloc");
97ee3a89
DG
281 goto error;
282 }
283
44d3bd01 284 /* Copy UST channel attributes */
48842b30
DG
285 luc->attr.overwrite = chan->attr.overwrite;
286 luc->attr.subbuf_size = chan->attr.subbuf_size;
287 luc->attr.num_subbuf = chan->attr.num_subbuf;
288 luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
289 luc->attr.read_timer_interval = chan->attr.read_timer_interval;
6775595e 290 luc->attr.output = (enum lttng_ust_output) chan->attr.output;
44d3bd01
DG
291
292 /* Translate to UST output enum */
293 switch (luc->attr.output) {
294 default:
295 luc->attr.output = LTTNG_UST_MMAP;
296 break;
97ee3a89 297 }
97ee3a89 298
85076754
MD
299 /*
300 * If we receive an empty string for channel name, it means the
301 * default channel name is requested.
302 */
303 if (chan->name[0] == '\0') {
304 strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name));
305 } else {
306 /* Copy channel name */
307 strncpy(luc->name, chan->name, sizeof(luc->name));
308 }
97ee3a89
DG
309 luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
310
f6a9efaa 311 /* Init node */
bec39940 312 lttng_ht_node_init_str(&luc->node, luc->name);
31746f93
DG
313 CDS_INIT_LIST_HEAD(&luc->ctx_list);
314
f6a9efaa 315 /* Alloc hash tables */
bec39940
DG
316 luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
317 luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
f6a9efaa 318
1624d5b7
JD
319 /* On-disk circular buffer parameters */
320 luc->tracefile_size = chan->attr.tracefile_size;
321 luc->tracefile_count = chan->attr.tracefile_count;
322
f6a9efaa
DG
323 DBG2("Trace UST channel %s created", luc->name);
324
97ee3a89 325error:
7972aab2 326 return luc;
97ee3a89
DG
327}
328
329/*
330 * Allocate and initialize a ust event. Set name and event type.
331 *
332 * Return pointer to structure or NULL.
333 */
025faf73 334struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
561c6897
JI
335 struct lttng_filter_bytecode *filter,
336 struct lttng_event_exclusion *exclusion)
97ee3a89
DG
337{
338 struct ltt_ust_event *lue;
97ee3a89 339
0525e9ae
DG
340 assert(ev);
341
37357452 342 lue = zmalloc(sizeof(struct ltt_ust_event));
44d3bd01 343 if (lue == NULL) {
ba7f0ae5 344 PERROR("ust event zmalloc");
97ee3a89
DG
345 goto error;
346 }
347
348 switch (ev->type) {
349 case LTTNG_EVENT_PROBE:
44d3bd01 350 lue->attr.instrumentation = LTTNG_UST_PROBE;
97ee3a89
DG
351 break;
352 case LTTNG_EVENT_FUNCTION:
44d3bd01 353 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
354 break;
355 case LTTNG_EVENT_FUNCTION_ENTRY:
44d3bd01 356 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
357 break;
358 case LTTNG_EVENT_TRACEPOINT:
44d3bd01 359 lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
97ee3a89
DG
360 break;
361 default:
362 ERR("Unknown ust instrumentation type (%d)", ev->type);
44844c29 363 goto error_free_event;
97ee3a89
DG
364 }
365
366 /* Copy event name */
44d3bd01
DG
367 strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
368 lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
97ee3a89 369
0cda4f28 370 switch (ev->loglevel_type) {
8005f29a
MD
371 case LTTNG_EVENT_LOGLEVEL_ALL:
372 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL;
22e25b71 373 lue->attr.loglevel = -1; /* Force to -1 */
0cda4f28 374 break;
8005f29a
MD
375 case LTTNG_EVENT_LOGLEVEL_RANGE:
376 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE;
22e25b71 377 lue->attr.loglevel = ev->loglevel;
8005f29a
MD
378 break;
379 case LTTNG_EVENT_LOGLEVEL_SINGLE:
380 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE;
22e25b71 381 lue->attr.loglevel = ev->loglevel;
0cda4f28
MD
382 break;
383 default:
4431494b 384 ERR("Unknown ust loglevel type (%d)", ev->loglevel_type);
0cda4f28
MD
385 goto error_free_event;
386 }
387
025faf73
DG
388 /* Same layout. */
389 lue->filter = (struct lttng_ust_filter_bytecode *) filter;
561c6897 390 lue->exclusion = (struct lttng_event_exclusion *) exclusion;
0cda4f28 391
f6a9efaa 392 /* Init node */
bec39940 393 lttng_ht_node_init_str(&lue->node, lue->attr.name);
97ee3a89 394
300b8fd5
MD
395 DBG2("Trace UST event %s, loglevel (%d,%d) created",
396 lue->attr.name, lue->attr.loglevel_type,
397 lue->attr.loglevel);
284d8f55 398
97ee3a89
DG
399 return lue;
400
44844c29
MD
401error_free_event:
402 free(lue);
97ee3a89
DG
403error:
404 return NULL;
405}
406
55cc08a6
DG
407/*
408 * Allocate and initialize an UST context.
409 *
410 * Return pointer to structure or NULL.
411 */
412struct ltt_ust_context *trace_ust_create_context(
413 struct lttng_event_context *ctx)
414{
415 struct ltt_ust_context *uctx;
9197c5c4
MD
416 enum lttng_ust_context_type utype;
417
0525e9ae
DG
418 assert(ctx);
419
9197c5c4
MD
420 switch (ctx->ctx) {
421 case LTTNG_EVENT_CONTEXT_VTID:
422 utype = LTTNG_UST_CONTEXT_VTID;
423 break;
424 case LTTNG_EVENT_CONTEXT_VPID:
425 utype = LTTNG_UST_CONTEXT_VPID;
426 break;
427 case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
428 utype = LTTNG_UST_CONTEXT_PTHREAD_ID;
429 break;
430 case LTTNG_EVENT_CONTEXT_PROCNAME:
431 utype = LTTNG_UST_CONTEXT_PROCNAME;
432 break;
7c612c2e
WP
433 case LTTNG_EVENT_CONTEXT_IP:
434 utype = LTTNG_UST_CONTEXT_IP;
435 break;
9197c5c4
MD
436 default:
437 ERR("Invalid UST context");
438 return NULL;
439 }
55cc08a6
DG
440
441 uctx = zmalloc(sizeof(struct ltt_ust_context));
442 if (uctx == NULL) {
443 PERROR("zmalloc ltt_ust_context");
444 goto error;
445 }
446
9197c5c4 447 uctx->ctx.ctx = utype;
bec39940 448 lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
31746f93 449 CDS_INIT_LIST_HEAD(&uctx->list);
55cc08a6
DG
450
451 return uctx;
452
453error:
454 return NULL;
455}
456
f6a9efaa
DG
457/*
458 * RCU safe free context structure.
459 */
460static void destroy_context_rcu(struct rcu_head *head)
461{
bec39940
DG
462 struct lttng_ht_node_ulong *node =
463 caa_container_of(head, struct lttng_ht_node_ulong, head);
f6a9efaa
DG
464 struct ltt_ust_context *ctx =
465 caa_container_of(node, struct ltt_ust_context, node);
466
467 free(ctx);
468}
469
470/*
471 * Cleanup UST context hash table.
472 */
7bd39047 473static void destroy_contexts(struct lttng_ht *ht)
f6a9efaa
DG
474{
475 int ret;
bec39940
DG
476 struct lttng_ht_node_ulong *node;
477 struct lttng_ht_iter iter;
31746f93 478 struct ltt_ust_context *ctx;
f6a9efaa 479
0525e9ae
DG
480 assert(ht);
481
36b588ed 482 rcu_read_lock();
bec39940 483 cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
31746f93
DG
484 /* Remove from ordered list. */
485 ctx = caa_container_of(node, struct ltt_ust_context, node);
486 cds_list_del(&ctx->list);
487 /* Remove from channel's hash table. */
bec39940 488 ret = lttng_ht_del(ht, &iter);
f6a9efaa
DG
489 if (!ret) {
490 call_rcu(&node->head, destroy_context_rcu);
491 }
f6a9efaa 492 }
36b588ed 493 rcu_read_unlock();
ed52805d 494
0b2dc8df 495 ht_cleanup_push(ht);
f6a9efaa
DG
496}
497
97ee3a89
DG
498/*
499 * Cleanup ust event structure.
500 */
501void trace_ust_destroy_event(struct ltt_ust_event *event)
502{
0525e9ae
DG
503 assert(event);
504
f6a9efaa 505 DBG2("Trace destroy UST event %s", event->attr.name);
53a80697 506 free(event->filter);
40024f8a 507 free(event->exclusion);
97ee3a89
DG
508 free(event);
509}
510
f6a9efaa
DG
511/*
512 * URCU intermediate call to complete destroy event.
513 */
514static void destroy_event_rcu(struct rcu_head *head)
515{
bec39940
DG
516 struct lttng_ht_node_str *node =
517 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
518 struct ltt_ust_event *event =
519 caa_container_of(node, struct ltt_ust_event, node);
520
521 trace_ust_destroy_event(event);
522}
523
284d8f55
DG
524/*
525 * Cleanup UST events hashtable.
526 */
7bd39047 527static void destroy_events(struct lttng_ht *events)
ed52805d
DG
528{
529 int ret;
bec39940
DG
530 struct lttng_ht_node_str *node;
531 struct lttng_ht_iter iter;
ed52805d 532
0525e9ae
DG
533 assert(events);
534
36b588ed 535 rcu_read_lock();
bec39940
DG
536 cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
537 ret = lttng_ht_del(events, &iter);
7bd39047
DG
538 assert(!ret);
539 call_rcu(&node->head, destroy_event_rcu);
ed52805d 540 }
36b588ed 541 rcu_read_unlock();
ed52805d 542
0b2dc8df 543 ht_cleanup_push(events);
ed52805d
DG
544}
545
97ee3a89
DG
546/*
547 * Cleanup ust channel structure.
36b588ed
MD
548 *
549 * Should _NOT_ be called with RCU read lock held.
97ee3a89 550 */
36b588ed 551static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel)
97ee3a89 552{
0525e9ae
DG
553 assert(channel);
554
f6a9efaa 555 DBG2("Trace destroy UST channel %s", channel->name);
97ee3a89 556
7bd39047
DG
557 /* Destroying all events of the channel */
558 destroy_events(channel->events);
559 /* Destroying all context of the channel */
560 destroy_contexts(channel->ctx);
97ee3a89 561
97ee3a89 562 free(channel);
f6a9efaa
DG
563}
564
565/*
566 * URCU intermediate call to complete destroy channel.
567 */
568static void destroy_channel_rcu(struct rcu_head *head)
569{
bec39940
DG
570 struct lttng_ht_node_str *node =
571 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
572 struct ltt_ust_channel *channel =
573 caa_container_of(node, struct ltt_ust_channel, node);
574
36b588ed
MD
575 _trace_ust_destroy_channel(channel);
576}
577
578void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
579{
580 call_rcu(&channel->node.head, destroy_channel_rcu);
97ee3a89
DG
581}
582
d5979e4a
DG
583/*
584 * Remove an UST channel from a channel HT.
585 */
586void trace_ust_delete_channel(struct lttng_ht *ht,
587 struct ltt_ust_channel *channel)
588{
589 int ret;
590 struct lttng_ht_iter iter;
591
592 assert(ht);
593 assert(channel);
594
595 iter.iter.node = &channel->node.node;
596 ret = lttng_ht_del(ht, &iter);
597 assert(!ret);
598}
599
97ee3a89 600/*
f6a9efaa 601 * Iterate over a hash table containing channels and cleanup safely.
97ee3a89 602 */
bec39940 603static void destroy_channels(struct lttng_ht *channels)
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604{
605 int ret;
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606 struct lttng_ht_node_str *node;
607 struct lttng_ht_iter iter;
f6a9efaa 608
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609 assert(channels);
610
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611 rcu_read_lock();
612
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613 cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
614 ret = lttng_ht_del(channels, &iter);
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615 assert(!ret);
616 call_rcu(&node->head, destroy_channel_rcu);
f6a9efaa 617 }
36b588ed 618 rcu_read_unlock();
ed52805d 619
0b2dc8df 620 ht_cleanup_push(channels);
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621}
622
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623/*
624 * Cleanup UST global domain.
625 */
626static void destroy_domain_global(struct ltt_ust_domain_global *dom)
627{
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628 assert(dom);
629
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630 destroy_channels(dom->channels);
631}
97ee3a89 632
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633/*
634 * Cleanup ust session structure
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635 *
636 * Should *NOT* be called with RCU read-side lock held.
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637 */
638void trace_ust_destroy_session(struct ltt_ust_session *session)
639{
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640 struct buffer_reg_uid *reg, *sreg;
641
0525e9ae 642 assert(session);
97ee3a89 643
d9bf3ca4 644 DBG2("Trace UST destroy session %" PRIu64, session->id);
f6a9efaa 645
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646 /* Cleaning up UST domain */
647 destroy_domain_global(&session->domain_global);
0475c50c 648 jul_destroy_domain(&session->domain_jul);
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649
650 /* Cleanup UID buffer registry object(s). */
651 cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list,
652 lnode) {
653 cds_list_del(&reg->lnode);
654 buffer_reg_uid_remove(reg);
655 buffer_reg_uid_destroy(reg, session->consumer);
656 }
44d3bd01 657
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658 consumer_destroy_output(session->consumer);
659 consumer_destroy_output(session->tmp_consumer);
660
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661 free(session);
662}
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