Fix: push metadata on stop for per-UID buffers
[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 *
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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 *
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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 *
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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
78 /* Match the 3 elements of the key: name, filter and loglevel. */
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
025faf73
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114 /* Match. */
115 return 1;
18eace3b
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116
117no_match:
118 return 0;
18eace3b
DG
119}
120
0177d773 121/*
2223c96f
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122 * Find the channel in the hashtable and return channel pointer. RCU read side
123 * lock MUST be acquired before calling this.
0177d773 124 */
bec39940 125struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
f6a9efaa 126 char *name)
0177d773 127{
bec39940
DG
128 struct lttng_ht_node_str *node;
129 struct lttng_ht_iter iter;
0177d773 130
bec39940
DG
131 lttng_ht_lookup(ht, (void *)name, &iter);
132 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 133 if (node == NULL) {
44d3bd01
DG
134 goto error;
135 }
136
f6a9efaa 137 DBG2("Trace UST channel %s found by name", name);
0177d773 138
f6a9efaa 139 return caa_container_of(node, struct ltt_ust_channel, node);
97ee3a89
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140
141error:
f6a9efaa 142 DBG2("Trace UST channel %s not found by name", name);
97ee3a89
DG
143 return NULL;
144}
145
146/*
2223c96f
DG
147 * Find the event in the hashtable and return event pointer. RCU read side lock
148 * MUST be acquired before calling this.
97ee3a89 149 */
18eace3b
DG
150struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
151 char *name, struct lttng_filter_bytecode *filter, int loglevel)
97ee3a89 152{
bec39940
DG
153 struct lttng_ht_node_str *node;
154 struct lttng_ht_iter iter;
18eace3b 155 struct ltt_ust_ht_key key;
97ee3a89 156
18eace3b
DG
157 assert(name);
158 assert(ht);
159
160 key.name = name;
161 key.filter = filter;
162 key.loglevel = loglevel;
163
18eace3b
DG
164 cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
165 trace_ust_ht_match_event, &key, &iter.iter);
bec39940 166 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 167 if (node == NULL) {
97ee3a89
DG
168 goto error;
169 }
170
18eace3b 171 DBG2("Trace UST event %s found", key.name);
f6a9efaa
DG
172
173 return caa_container_of(node, struct ltt_ust_event, node);
97ee3a89
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174
175error:
18eace3b 176 DBG2("Trace UST event %s NOT found", key.name);
97ee3a89
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177 return NULL;
178}
179
180/*
181 * Allocate and initialize a ust session data structure.
182 *
183 * Return pointer to structure or NULL.
184 */
d9bf3ca4 185struct ltt_ust_session *trace_ust_create_session(uint64_t session_id)
97ee3a89
DG
186{
187 struct ltt_ust_session *lus;
188
189 /* Allocate a new ltt ust session */
ba7f0ae5 190 lus = zmalloc(sizeof(struct ltt_ust_session));
97ee3a89 191 if (lus == NULL) {
ba7f0ae5 192 PERROR("create ust session zmalloc");
97ee3a89
DG
193 goto error;
194 }
195
196 /* Init data structure */
a991f516 197 lus->id = session_id;
36dc12cc 198 lus->start_trace = 0;
97ee3a89 199
7972aab2
DG
200 /*
201 * Default buffer type. This can be changed through an enable channel
202 * requesting a different type. Note that this can only be changed once
203 * during the session lifetime which is at the first enable channel and
204 * only before start. The flag buffer_type_changed indicates the status.
205 */
8692d4e5 206 lus->buffer_type = LTTNG_BUFFER_PER_UID;
7972aab2
DG
207 /* Once set to 1, the buffer_type is immutable for the session. */
208 lus->buffer_type_changed = 0;
209 /* Init it in case it get used after allocation. */
210 CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list);
f6a9efaa
DG
211
212 /* Alloc UST global domain channels' HT */
bec39940 213 lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
44d3bd01 214
00e2e675
DG
215 lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
216 if (lus->consumer == NULL) {
09a90bcd 217 goto error_consumer;
00e2e675
DG
218 }
219
220 /*
221 * The tmp_consumer stays NULL until a set_consumer_uri command is
222 * executed. At this point, the consumer should be nullify until an
223 * enable_consumer command. This assignment is symbolic since we've zmalloc
224 * the struct.
225 */
226 lus->tmp_consumer = NULL;
227
44d3bd01
DG
228 DBG2("UST trace session create successful");
229
97ee3a89
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230 return lus;
231
09a90bcd 232error_consumer:
0b2dc8df 233 ht_cleanup_push(lus->domain_global.channels);
44844c29 234 free(lus);
97ee3a89
DG
235error:
236 return NULL;
237}
238
239/*
240 * Allocate and initialize a ust channel data structure.
241 *
242 * Return pointer to structure or NULL.
243 */
dec56f6c 244struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan)
97ee3a89 245{
97ee3a89
DG
246 struct ltt_ust_channel *luc;
247
0525e9ae 248 assert(chan);
0525e9ae 249
37357452 250 luc = zmalloc(sizeof(struct ltt_ust_channel));
97ee3a89 251 if (luc == NULL) {
df0f840b 252 PERROR("ltt_ust_channel zmalloc");
97ee3a89
DG
253 goto error;
254 }
255
44d3bd01 256 /* Copy UST channel attributes */
48842b30
DG
257 luc->attr.overwrite = chan->attr.overwrite;
258 luc->attr.subbuf_size = chan->attr.subbuf_size;
259 luc->attr.num_subbuf = chan->attr.num_subbuf;
260 luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
261 luc->attr.read_timer_interval = chan->attr.read_timer_interval;
6775595e 262 luc->attr.output = (enum lttng_ust_output) chan->attr.output;
44d3bd01
DG
263
264 /* Translate to UST output enum */
265 switch (luc->attr.output) {
266 default:
267 luc->attr.output = LTTNG_UST_MMAP;
268 break;
97ee3a89 269 }
97ee3a89 270
97ee3a89 271 /* Copy channel name */
0a1459bb 272 strncpy(luc->name, chan->name, sizeof(luc->name));
97ee3a89
DG
273 luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
274
f6a9efaa 275 /* Init node */
bec39940 276 lttng_ht_node_init_str(&luc->node, luc->name);
f6a9efaa 277 /* Alloc hash tables */
bec39940
DG
278 luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
279 luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
f6a9efaa 280
1624d5b7
JD
281 /* On-disk circular buffer parameters */
282 luc->tracefile_size = chan->attr.tracefile_size;
283 luc->tracefile_count = chan->attr.tracefile_count;
284
f6a9efaa
DG
285 DBG2("Trace UST channel %s created", luc->name);
286
97ee3a89 287error:
7972aab2 288 return luc;
97ee3a89
DG
289}
290
291/*
292 * Allocate and initialize a ust event. Set name and event type.
293 *
294 * Return pointer to structure or NULL.
295 */
025faf73
DG
296struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
297 struct lttng_filter_bytecode *filter)
97ee3a89
DG
298{
299 struct ltt_ust_event *lue;
97ee3a89 300
0525e9ae
DG
301 assert(ev);
302
37357452 303 lue = zmalloc(sizeof(struct ltt_ust_event));
44d3bd01 304 if (lue == NULL) {
ba7f0ae5 305 PERROR("ust event zmalloc");
97ee3a89
DG
306 goto error;
307 }
308
309 switch (ev->type) {
310 case LTTNG_EVENT_PROBE:
44d3bd01 311 lue->attr.instrumentation = LTTNG_UST_PROBE;
97ee3a89
DG
312 break;
313 case LTTNG_EVENT_FUNCTION:
44d3bd01 314 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
315 break;
316 case LTTNG_EVENT_FUNCTION_ENTRY:
44d3bd01 317 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
318 break;
319 case LTTNG_EVENT_TRACEPOINT:
44d3bd01 320 lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
97ee3a89
DG
321 break;
322 default:
323 ERR("Unknown ust instrumentation type (%d)", ev->type);
44844c29 324 goto error_free_event;
97ee3a89
DG
325 }
326
327 /* Copy event name */
44d3bd01
DG
328 strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
329 lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
97ee3a89 330
0cda4f28 331 switch (ev->loglevel_type) {
8005f29a
MD
332 case LTTNG_EVENT_LOGLEVEL_ALL:
333 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL;
22e25b71 334 lue->attr.loglevel = -1; /* Force to -1 */
0cda4f28 335 break;
8005f29a
MD
336 case LTTNG_EVENT_LOGLEVEL_RANGE:
337 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE;
22e25b71 338 lue->attr.loglevel = ev->loglevel;
8005f29a
MD
339 break;
340 case LTTNG_EVENT_LOGLEVEL_SINGLE:
341 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE;
22e25b71 342 lue->attr.loglevel = ev->loglevel;
0cda4f28
MD
343 break;
344 default:
4431494b 345 ERR("Unknown ust loglevel type (%d)", ev->loglevel_type);
0cda4f28
MD
346 goto error_free_event;
347 }
348
025faf73
DG
349 /* Same layout. */
350 lue->filter = (struct lttng_ust_filter_bytecode *) filter;
0cda4f28 351
f6a9efaa 352 /* Init node */
bec39940 353 lttng_ht_node_init_str(&lue->node, lue->attr.name);
97ee3a89 354
300b8fd5
MD
355 DBG2("Trace UST event %s, loglevel (%d,%d) created",
356 lue->attr.name, lue->attr.loglevel_type,
357 lue->attr.loglevel);
284d8f55 358
97ee3a89
DG
359 return lue;
360
44844c29
MD
361error_free_event:
362 free(lue);
97ee3a89
DG
363error:
364 return NULL;
365}
366
367/*
368 * Allocate and initialize a ust metadata.
369 *
370 * Return pointer to structure or NULL.
371 */
372struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
373{
374 int ret;
375 struct ltt_ust_metadata *lum;
97ee3a89 376
0525e9ae
DG
377 assert(path);
378
3a009adb 379 lum = zmalloc(sizeof(struct ltt_ust_metadata));
44d3bd01 380 if (lum == NULL) {
df0f840b 381 PERROR("ust metadata zmalloc");
97ee3a89
DG
382 goto error;
383 }
384
385 /* Set default attributes */
44d3bd01 386 lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
3e230f92 387 lum->attr.subbuf_size = default_get_metadata_subbuf_size();
44d3bd01 388 lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
0a9c6494
DG
389 lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER;
390 lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER;
d41f73b7 391 lum->attr.output = LTTNG_UST_MMAP;
44d3bd01 392
97ee3a89
DG
393 lum->handle = -1;
394 /* Set metadata trace path */
30079b6b 395 ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path);
97ee3a89 396 if (ret < 0) {
df0f840b 397 PERROR("asprintf ust metadata");
44844c29 398 goto error_free_metadata;
97ee3a89
DG
399 }
400
401 return lum;
402
44844c29
MD
403error_free_metadata:
404 free(lum);
97ee3a89
DG
405error:
406 return NULL;
407}
408
55cc08a6
DG
409/*
410 * Allocate and initialize an UST context.
411 *
412 * Return pointer to structure or NULL.
413 */
414struct ltt_ust_context *trace_ust_create_context(
415 struct lttng_event_context *ctx)
416{
417 struct ltt_ust_context *uctx;
9197c5c4
MD
418 enum lttng_ust_context_type utype;
419
0525e9ae
DG
420 assert(ctx);
421
9197c5c4
MD
422 switch (ctx->ctx) {
423 case LTTNG_EVENT_CONTEXT_VTID:
424 utype = LTTNG_UST_CONTEXT_VTID;
425 break;
426 case LTTNG_EVENT_CONTEXT_VPID:
427 utype = LTTNG_UST_CONTEXT_VPID;
428 break;
429 case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
430 utype = LTTNG_UST_CONTEXT_PTHREAD_ID;
431 break;
432 case LTTNG_EVENT_CONTEXT_PROCNAME:
433 utype = LTTNG_UST_CONTEXT_PROCNAME;
434 break;
7c612c2e
WP
435 case LTTNG_EVENT_CONTEXT_IP:
436 utype = LTTNG_UST_CONTEXT_IP;
437 break;
9197c5c4
MD
438 default:
439 ERR("Invalid UST context");
440 return NULL;
441 }
55cc08a6
DG
442
443 uctx = zmalloc(sizeof(struct ltt_ust_context));
444 if (uctx == NULL) {
445 PERROR("zmalloc ltt_ust_context");
446 goto error;
447 }
448
9197c5c4 449 uctx->ctx.ctx = utype;
bec39940 450 lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
55cc08a6
DG
451
452 return uctx;
453
454error:
455 return NULL;
456}
457
f6a9efaa
DG
458/*
459 * RCU safe free context structure.
460 */
461static void destroy_context_rcu(struct rcu_head *head)
462{
bec39940
DG
463 struct lttng_ht_node_ulong *node =
464 caa_container_of(head, struct lttng_ht_node_ulong, head);
f6a9efaa
DG
465 struct ltt_ust_context *ctx =
466 caa_container_of(node, struct ltt_ust_context, node);
467
468 free(ctx);
469}
470
471/*
472 * Cleanup UST context hash table.
473 */
7bd39047 474static void destroy_contexts(struct lttng_ht *ht)
f6a9efaa
DG
475{
476 int ret;
bec39940
DG
477 struct lttng_ht_node_ulong *node;
478 struct lttng_ht_iter iter;
f6a9efaa 479
0525e9ae
DG
480 assert(ht);
481
36b588ed 482 rcu_read_lock();
bec39940
DG
483 cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
484 ret = lttng_ht_del(ht, &iter);
f6a9efaa
DG
485 if (!ret) {
486 call_rcu(&node->head, destroy_context_rcu);
487 }
f6a9efaa 488 }
36b588ed 489 rcu_read_unlock();
ed52805d 490
0b2dc8df 491 ht_cleanup_push(ht);
f6a9efaa
DG
492}
493
97ee3a89
DG
494/*
495 * Cleanup ust event structure.
496 */
497void trace_ust_destroy_event(struct ltt_ust_event *event)
498{
0525e9ae
DG
499 assert(event);
500
f6a9efaa 501 DBG2("Trace destroy UST event %s", event->attr.name);
53a80697 502 free(event->filter);
97ee3a89
DG
503 free(event);
504}
505
f6a9efaa
DG
506/*
507 * URCU intermediate call to complete destroy event.
508 */
509static void destroy_event_rcu(struct rcu_head *head)
510{
bec39940
DG
511 struct lttng_ht_node_str *node =
512 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
513 struct ltt_ust_event *event =
514 caa_container_of(node, struct ltt_ust_event, node);
515
516 trace_ust_destroy_event(event);
517}
518
284d8f55
DG
519/*
520 * Cleanup UST events hashtable.
521 */
7bd39047 522static void destroy_events(struct lttng_ht *events)
ed52805d
DG
523{
524 int ret;
bec39940
DG
525 struct lttng_ht_node_str *node;
526 struct lttng_ht_iter iter;
ed52805d 527
0525e9ae
DG
528 assert(events);
529
36b588ed 530 rcu_read_lock();
bec39940
DG
531 cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
532 ret = lttng_ht_del(events, &iter);
7bd39047
DG
533 assert(!ret);
534 call_rcu(&node->head, destroy_event_rcu);
ed52805d 535 }
36b588ed 536 rcu_read_unlock();
ed52805d 537
0b2dc8df 538 ht_cleanup_push(events);
ed52805d
DG
539}
540
97ee3a89
DG
541/*
542 * Cleanup ust channel structure.
36b588ed
MD
543 *
544 * Should _NOT_ be called with RCU read lock held.
97ee3a89 545 */
36b588ed 546static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel)
97ee3a89 547{
0525e9ae
DG
548 assert(channel);
549
f6a9efaa 550 DBG2("Trace destroy UST channel %s", channel->name);
97ee3a89 551
7bd39047
DG
552 /* Destroying all events of the channel */
553 destroy_events(channel->events);
554 /* Destroying all context of the channel */
555 destroy_contexts(channel->ctx);
97ee3a89 556
97ee3a89 557 free(channel);
f6a9efaa
DG
558}
559
560/*
561 * URCU intermediate call to complete destroy channel.
562 */
563static void destroy_channel_rcu(struct rcu_head *head)
564{
bec39940
DG
565 struct lttng_ht_node_str *node =
566 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
567 struct ltt_ust_channel *channel =
568 caa_container_of(node, struct ltt_ust_channel, node);
569
36b588ed
MD
570 _trace_ust_destroy_channel(channel);
571}
572
573void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
574{
575 call_rcu(&channel->node.head, destroy_channel_rcu);
97ee3a89
DG
576}
577
d5979e4a
DG
578/*
579 * Remove an UST channel from a channel HT.
580 */
581void trace_ust_delete_channel(struct lttng_ht *ht,
582 struct ltt_ust_channel *channel)
583{
584 int ret;
585 struct lttng_ht_iter iter;
586
587 assert(ht);
588 assert(channel);
589
590 iter.iter.node = &channel->node.node;
591 ret = lttng_ht_del(ht, &iter);
592 assert(!ret);
593}
594
97ee3a89
DG
595/*
596 * Cleanup ust metadata structure.
597 */
598void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
599{
0525e9ae
DG
600 assert(metadata);
601
abc9138a
MD
602 if (!metadata->handle) {
603 return;
604 }
f6a9efaa 605 DBG2("Trace UST destroy metadata %d", metadata->handle);
97ee3a89
DG
606 free(metadata);
607}
608
609/*
f6a9efaa 610 * Iterate over a hash table containing channels and cleanup safely.
97ee3a89 611 */
bec39940 612static void destroy_channels(struct lttng_ht *channels)
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613{
614 int ret;
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615 struct lttng_ht_node_str *node;
616 struct lttng_ht_iter iter;
f6a9efaa 617
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618 assert(channels);
619
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620 rcu_read_lock();
621
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622 cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
623 ret = lttng_ht_del(channels, &iter);
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624 assert(!ret);
625 call_rcu(&node->head, destroy_channel_rcu);
f6a9efaa 626 }
36b588ed 627 rcu_read_unlock();
ed52805d 628
0b2dc8df 629 ht_cleanup_push(channels);
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630}
631
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632/*
633 * Cleanup UST global domain.
634 */
635static void destroy_domain_global(struct ltt_ust_domain_global *dom)
636{
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637 assert(dom);
638
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639 destroy_channels(dom->channels);
640}
97ee3a89 641
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642/*
643 * Cleanup ust session structure
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644 *
645 * Should *NOT* be called with RCU read-side lock held.
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646 */
647void trace_ust_destroy_session(struct ltt_ust_session *session)
648{
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649 struct buffer_reg_uid *reg, *sreg;
650
0525e9ae 651 assert(session);
97ee3a89 652
d9bf3ca4 653 DBG2("Trace UST destroy session %" PRIu64, session->id);
f6a9efaa 654
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655 /* Cleaning up UST domain */
656 destroy_domain_global(&session->domain_global);
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657
658 /* Cleanup UID buffer registry object(s). */
659 cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list,
660 lnode) {
661 cds_list_del(&reg->lnode);
662 buffer_reg_uid_remove(reg);
663 buffer_reg_uid_destroy(reg, session->consumer);
664 }
44d3bd01 665
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666 consumer_destroy_output(session->consumer);
667 consumer_destroy_output(session->tmp_consumer);
668
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669 free(session);
670}
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