lttng.h API update: set filter becomes enable event with filter
[lttng-tools.git] / src / bin / lttng-sessiond / trace-ust.c
CommitLineData
97ee3a89
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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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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.
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16 */
17
18#define _GNU_SOURCE
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <unistd.h>
23
990570ed
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24#include <common/common.h>
25#include <common/defaults.h>
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26
27#include "trace-ust.h"
28
025faf73
DG
29/*
30 * Match function for the events hash table lookup.
31 *
32 * Matches by name only. Used by the disable command.
33 */
18eace3b
DG
34int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
35 const void *_key)
36{
37 struct ltt_ust_event *event;
38 const char *name;
39
40 assert(node);
41 assert(_key);
42
43 event = caa_container_of(node, struct ltt_ust_event, node.node);
44 name = _key;
45
46 /* Event name */
47 if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) {
48 goto no_match;
49 }
50
025faf73 51 /* Match */
18eace3b
DG
52 return 1;
53
54no_match:
55 return 0;
56}
57
025faf73
DG
58/*
59 * Match function for the hash table lookup.
60 *
61 * It matches an ust event based on three attributes which are the event name,
62 * the filter bytecode and the loglevel.
63 */
18eace3b
DG
64int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key)
65{
66 struct ltt_ust_event *event;
67 const struct ltt_ust_ht_key *key;
68
69 assert(node);
70 assert(_key);
71
72 event = caa_container_of(node, struct ltt_ust_event, node.node);
73 key = _key;
74
75 /* Match the 3 elements of the key: name, filter and loglevel. */
76
77 /* Event name */
78 if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) {
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79 goto no_match;
80 }
81
82 /* Event loglevel. */
83 if (event->attr.loglevel != key->loglevel) {
025faf73
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84 if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL
85 && key->loglevel == 0 && event->attr.loglevel == -1) {
18eace3b 86 /*
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87 * Match is accepted. This is because on event creation, the
88 * loglevel is set to -1 if the event loglevel type is ALL so 0 and
89 * -1 are accepted for this loglevel type since 0 is the one set by
90 * the API when receiving an enable event.
18eace3b
DG
91 */
92 } else {
18eace3b
DG
93 goto no_match;
94 }
95 }
96
97 /* Only one of the filters is NULL, fail. */
98 if ((key->filter && !event->filter) || (!key->filter && event->filter)) {
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99 goto no_match;
100 }
101
025faf73
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102 if (key->filter && event->filter) {
103 /* Both filters exists, check length followed by the bytecode. */
104 if (event->filter->len != key->filter->len ||
105 memcmp(event->filter->data, key->filter->data,
106 event->filter->len) != 0) {
107 goto no_match;
108 }
18eace3b
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109 }
110
025faf73
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111 /* Match. */
112 return 1;
18eace3b
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113
114no_match:
115 return 0;
18eace3b
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116}
117
0177d773 118/*
f6a9efaa 119 * Find the channel in the hashtable.
0177d773 120 */
bec39940 121struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
f6a9efaa 122 char *name)
0177d773 123{
bec39940
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124 struct lttng_ht_node_str *node;
125 struct lttng_ht_iter iter;
0177d773 126
f6a9efaa 127 rcu_read_lock();
bec39940
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128 lttng_ht_lookup(ht, (void *)name, &iter);
129 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa
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130 if (node == NULL) {
131 rcu_read_unlock();
44d3bd01
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132 goto error;
133 }
f6a9efaa 134 rcu_read_unlock();
44d3bd01 135
f6a9efaa 136 DBG2("Trace UST channel %s found by name", name);
0177d773 137
f6a9efaa 138 return caa_container_of(node, struct ltt_ust_channel, node);
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139
140error:
f6a9efaa 141 DBG2("Trace UST channel %s not found by name", name);
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142 return NULL;
143}
144
145/*
f6a9efaa 146 * Find the event in the hashtable.
97ee3a89 147 */
18eace3b
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148struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
149 char *name, struct lttng_filter_bytecode *filter, int loglevel)
97ee3a89 150{
bec39940
DG
151 struct lttng_ht_node_str *node;
152 struct lttng_ht_iter iter;
18eace3b 153 struct ltt_ust_ht_key key;
97ee3a89 154
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DG
155 assert(name);
156 assert(ht);
157
158 key.name = name;
159 key.filter = filter;
160 key.loglevel = loglevel;
161
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162 cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
163 trace_ust_ht_match_event, &key, &iter.iter);
bec39940 164 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 165 if (node == NULL) {
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166 goto error;
167 }
168
18eace3b 169 DBG2("Trace UST event %s found", key.name);
f6a9efaa
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170
171 return caa_container_of(node, struct ltt_ust_event, node);
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172
173error:
18eace3b 174 DBG2("Trace UST event %s NOT found", key.name);
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175 return NULL;
176}
177
178/*
179 * Allocate and initialize a ust session data structure.
180 *
181 * Return pointer to structure or NULL.
182 */
fc4705fe
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183struct ltt_ust_session *trace_ust_create_session(char *path,
184 unsigned int session_id, struct lttng_domain *domain)
97ee3a89 185{
0177d773 186 int ret;
97ee3a89
DG
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");
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DG
193 goto error;
194 }
195
196 /* Init data structure */
a991f516 197 lus->id = session_id;
36dc12cc 198 lus->start_trace = 0;
97ee3a89 199
f6a9efaa 200 /* Alloc UST domain hash tables */
bec39940
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201 lus->domain_pid = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
202 lus->domain_exec = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
f6a9efaa
DG
203
204 /* Alloc UST global domain channels' HT */
bec39940 205 lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
44d3bd01 206
00e2e675
DG
207 lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
208 if (lus->consumer == NULL) {
09a90bcd 209 goto error_consumer;
00e2e675
DG
210 }
211
212 /*
213 * The tmp_consumer stays NULL until a set_consumer_uri command is
214 * executed. At this point, the consumer should be nullify until an
215 * enable_consumer command. This assignment is symbolic since we've zmalloc
216 * the struct.
217 */
218 lus->tmp_consumer = NULL;
219
220 /* Use the default consumer output which is the tracing session path. */
a4b92340
DG
221 if (path && strlen(path) > 0) {
222 ret = snprintf(lus->consumer->dst.trace_path, PATH_MAX,
223 "%s" DEFAULT_UST_TRACE_DIR, path);
224 if (ret < 0) {
225 PERROR("snprintf UST consumer trace path");
09a90bcd 226 goto error_path;
a4b92340
DG
227 }
228
229 /* Set session path */
230 ret = snprintf(lus->pathname, PATH_MAX, "%s" DEFAULT_UST_TRACE_DIR,
231 path);
232 if (ret < 0) {
233 PERROR("snprintf kernel traces path");
09a90bcd 234 goto error_path;
a4b92340 235 }
0177d773
DG
236 }
237
44d3bd01
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238 DBG2("UST trace session create successful");
239
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240 return lus;
241
09a90bcd
DG
242error_path:
243 consumer_destroy_output(lus->consumer);
244error_consumer:
a2c0da86
MD
245 lttng_ht_destroy(lus->domain_global.channels);
246 lttng_ht_destroy(lus->domain_exec);
247 lttng_ht_destroy(lus->domain_pid);
44844c29 248 free(lus);
97ee3a89
DG
249error:
250 return NULL;
251}
252
253/*
254 * Allocate and initialize a ust channel data structure.
255 *
256 * Return pointer to structure or NULL.
257 */
44d3bd01
DG
258struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan,
259 char *path)
97ee3a89
DG
260{
261 int ret;
262 struct ltt_ust_channel *luc;
263
37357452 264 luc = zmalloc(sizeof(struct ltt_ust_channel));
97ee3a89 265 if (luc == NULL) {
df0f840b 266 PERROR("ltt_ust_channel zmalloc");
97ee3a89
DG
267 goto error;
268 }
269
44d3bd01 270 /* Copy UST channel attributes */
48842b30
DG
271 luc->attr.overwrite = chan->attr.overwrite;
272 luc->attr.subbuf_size = chan->attr.subbuf_size;
273 luc->attr.num_subbuf = chan->attr.num_subbuf;
274 luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
275 luc->attr.read_timer_interval = chan->attr.read_timer_interval;
6775595e 276 luc->attr.output = (enum lttng_ust_output) chan->attr.output;
44d3bd01
DG
277
278 /* Translate to UST output enum */
279 switch (luc->attr.output) {
280 default:
281 luc->attr.output = LTTNG_UST_MMAP;
282 break;
97ee3a89 283 }
97ee3a89 284
97ee3a89 285 /* Copy channel name */
0a1459bb 286 strncpy(luc->name, chan->name, sizeof(luc->name));
97ee3a89
DG
287 luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
288
f6a9efaa 289 /* Init node */
bec39940 290 lttng_ht_node_init_str(&luc->node, luc->name);
f6a9efaa 291 /* Alloc hash tables */
bec39940
DG
292 luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
293 luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
f6a9efaa 294
97ee3a89 295 /* Set trace output path */
48842b30 296 ret = snprintf(luc->pathname, PATH_MAX, "%s", path);
97ee3a89 297 if (ret < 0) {
df0f840b 298 PERROR("asprintf ust create channel");
44844c29 299 goto error_free_channel;
97ee3a89
DG
300 }
301
f6a9efaa
DG
302 DBG2("Trace UST channel %s created", luc->name);
303
97ee3a89
DG
304 return luc;
305
44844c29 306error_free_channel:
a2c0da86
MD
307 lttng_ht_destroy(luc->ctx);
308 lttng_ht_destroy(luc->events);
44844c29 309 free(luc);
97ee3a89
DG
310error:
311 return NULL;
312}
313
314/*
315 * Allocate and initialize a ust event. Set name and event type.
316 *
317 * Return pointer to structure or NULL.
318 */
025faf73
DG
319struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
320 struct lttng_filter_bytecode *filter)
97ee3a89
DG
321{
322 struct ltt_ust_event *lue;
97ee3a89 323
37357452 324 lue = zmalloc(sizeof(struct ltt_ust_event));
44d3bd01 325 if (lue == NULL) {
ba7f0ae5 326 PERROR("ust event zmalloc");
97ee3a89
DG
327 goto error;
328 }
329
330 switch (ev->type) {
331 case LTTNG_EVENT_PROBE:
44d3bd01 332 lue->attr.instrumentation = LTTNG_UST_PROBE;
97ee3a89
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333 break;
334 case LTTNG_EVENT_FUNCTION:
44d3bd01 335 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
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336 break;
337 case LTTNG_EVENT_FUNCTION_ENTRY:
44d3bd01 338 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
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339 break;
340 case LTTNG_EVENT_TRACEPOINT:
44d3bd01 341 lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
97ee3a89
DG
342 break;
343 default:
344 ERR("Unknown ust instrumentation type (%d)", ev->type);
44844c29 345 goto error_free_event;
97ee3a89
DG
346 }
347
348 /* Copy event name */
44d3bd01
DG
349 strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
350 lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
97ee3a89 351
0cda4f28 352 switch (ev->loglevel_type) {
8005f29a
MD
353 case LTTNG_EVENT_LOGLEVEL_ALL:
354 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL;
22e25b71 355 lue->attr.loglevel = -1; /* Force to -1 */
0cda4f28 356 break;
8005f29a
MD
357 case LTTNG_EVENT_LOGLEVEL_RANGE:
358 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE;
22e25b71 359 lue->attr.loglevel = ev->loglevel;
8005f29a
MD
360 break;
361 case LTTNG_EVENT_LOGLEVEL_SINGLE:
362 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE;
22e25b71 363 lue->attr.loglevel = ev->loglevel;
0cda4f28
MD
364 break;
365 default:
4431494b 366 ERR("Unknown ust loglevel type (%d)", ev->loglevel_type);
0cda4f28
MD
367 goto error_free_event;
368 }
369
025faf73
DG
370 /* Same layout. */
371 lue->filter = (struct lttng_ust_filter_bytecode *) filter;
0cda4f28 372
f6a9efaa 373 /* Init node */
bec39940 374 lttng_ht_node_init_str(&lue->node, lue->attr.name);
97ee3a89 375
300b8fd5
MD
376 DBG2("Trace UST event %s, loglevel (%d,%d) created",
377 lue->attr.name, lue->attr.loglevel_type,
378 lue->attr.loglevel);
284d8f55 379
97ee3a89
DG
380 return lue;
381
44844c29
MD
382error_free_event:
383 free(lue);
97ee3a89
DG
384error:
385 return NULL;
386}
387
388/*
389 * Allocate and initialize a ust metadata.
390 *
391 * Return pointer to structure or NULL.
392 */
393struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
394{
395 int ret;
396 struct ltt_ust_metadata *lum;
97ee3a89 397
3a009adb 398 lum = zmalloc(sizeof(struct ltt_ust_metadata));
44d3bd01 399 if (lum == NULL) {
df0f840b 400 PERROR("ust metadata zmalloc");
97ee3a89
DG
401 goto error;
402 }
403
404 /* Set default attributes */
44d3bd01 405 lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
3e230f92 406 lum->attr.subbuf_size = default_get_metadata_subbuf_size();
44d3bd01
DG
407 lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
408 lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
409 lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
d41f73b7 410 lum->attr.output = LTTNG_UST_MMAP;
44d3bd01 411
97ee3a89
DG
412 lum->handle = -1;
413 /* Set metadata trace path */
f6a9efaa 414 ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path);
97ee3a89 415 if (ret < 0) {
df0f840b 416 PERROR("asprintf ust metadata");
44844c29 417 goto error_free_metadata;
97ee3a89
DG
418 }
419
420 return lum;
421
44844c29
MD
422error_free_metadata:
423 free(lum);
97ee3a89
DG
424error:
425 return NULL;
426}
427
55cc08a6
DG
428/*
429 * Allocate and initialize an UST context.
430 *
431 * Return pointer to structure or NULL.
432 */
433struct ltt_ust_context *trace_ust_create_context(
434 struct lttng_event_context *ctx)
435{
436 struct ltt_ust_context *uctx;
9197c5c4
MD
437 enum lttng_ust_context_type utype;
438
439 switch (ctx->ctx) {
440 case LTTNG_EVENT_CONTEXT_VTID:
441 utype = LTTNG_UST_CONTEXT_VTID;
442 break;
443 case LTTNG_EVENT_CONTEXT_VPID:
444 utype = LTTNG_UST_CONTEXT_VPID;
445 break;
446 case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
447 utype = LTTNG_UST_CONTEXT_PTHREAD_ID;
448 break;
449 case LTTNG_EVENT_CONTEXT_PROCNAME:
450 utype = LTTNG_UST_CONTEXT_PROCNAME;
451 break;
452 default:
453 ERR("Invalid UST context");
454 return NULL;
455 }
55cc08a6
DG
456
457 uctx = zmalloc(sizeof(struct ltt_ust_context));
458 if (uctx == NULL) {
459 PERROR("zmalloc ltt_ust_context");
460 goto error;
461 }
462
9197c5c4 463 uctx->ctx.ctx = utype;
bec39940 464 lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
55cc08a6
DG
465
466 return uctx;
467
468error:
469 return NULL;
470}
471
f6a9efaa
DG
472/*
473 * RCU safe free context structure.
474 */
475static void destroy_context_rcu(struct rcu_head *head)
476{
bec39940
DG
477 struct lttng_ht_node_ulong *node =
478 caa_container_of(head, struct lttng_ht_node_ulong, head);
f6a9efaa
DG
479 struct ltt_ust_context *ctx =
480 caa_container_of(node, struct ltt_ust_context, node);
481
482 free(ctx);
483}
484
485/*
486 * Cleanup UST context hash table.
487 */
7bd39047 488static void destroy_contexts(struct lttng_ht *ht)
f6a9efaa
DG
489{
490 int ret;
bec39940
DG
491 struct lttng_ht_node_ulong *node;
492 struct lttng_ht_iter iter;
f6a9efaa 493
bec39940
DG
494 cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
495 ret = lttng_ht_del(ht, &iter);
f6a9efaa
DG
496 if (!ret) {
497 call_rcu(&node->head, destroy_context_rcu);
498 }
f6a9efaa 499 }
ed52805d 500
bec39940 501 lttng_ht_destroy(ht);
f6a9efaa
DG
502}
503
97ee3a89
DG
504/*
505 * Cleanup ust event structure.
506 */
507void trace_ust_destroy_event(struct ltt_ust_event *event)
508{
f6a9efaa 509 DBG2("Trace destroy UST event %s", event->attr.name);
53a80697 510 free(event->filter);
97ee3a89
DG
511 free(event);
512}
513
f6a9efaa
DG
514/*
515 * URCU intermediate call to complete destroy event.
516 */
517static void destroy_event_rcu(struct rcu_head *head)
518{
bec39940
DG
519 struct lttng_ht_node_str *node =
520 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
521 struct ltt_ust_event *event =
522 caa_container_of(node, struct ltt_ust_event, node);
523
524 trace_ust_destroy_event(event);
525}
526
284d8f55
DG
527/*
528 * Cleanup UST events hashtable.
529 */
7bd39047 530static void destroy_events(struct lttng_ht *events)
ed52805d
DG
531{
532 int ret;
bec39940
DG
533 struct lttng_ht_node_str *node;
534 struct lttng_ht_iter iter;
ed52805d 535
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
DG
540 }
541
bec39940 542 lttng_ht_destroy(events);
ed52805d
DG
543}
544
97ee3a89
DG
545/*
546 * Cleanup ust channel structure.
547 */
548void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
549{
f6a9efaa 550 DBG2("Trace destroy UST channel %s", channel->name);
97ee3a89 551
f6a9efaa
DG
552 rcu_read_lock();
553
7bd39047
DG
554 /* Destroying all events of the channel */
555 destroy_events(channel->events);
556 /* Destroying all context of the channel */
557 destroy_contexts(channel->ctx);
97ee3a89 558
97ee3a89 559 free(channel);
f6a9efaa
DG
560
561 rcu_read_unlock();
562}
563
564/*
565 * URCU intermediate call to complete destroy channel.
566 */
567static void destroy_channel_rcu(struct rcu_head *head)
568{
bec39940
DG
569 struct lttng_ht_node_str *node =
570 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
571 struct ltt_ust_channel *channel =
572 caa_container_of(node, struct ltt_ust_channel, node);
573
574 trace_ust_destroy_channel(channel);
97ee3a89
DG
575}
576
577/*
578 * Cleanup ust metadata structure.
579 */
580void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
581{
abc9138a
MD
582 if (!metadata->handle) {
583 return;
584 }
f6a9efaa 585 DBG2("Trace UST destroy metadata %d", metadata->handle);
97ee3a89
DG
586 free(metadata);
587}
588
589/*
f6a9efaa 590 * Iterate over a hash table containing channels and cleanup safely.
97ee3a89 591 */
bec39940 592static void destroy_channels(struct lttng_ht *channels)
f6a9efaa
DG
593{
594 int ret;
bec39940
DG
595 struct lttng_ht_node_str *node;
596 struct lttng_ht_iter iter;
f6a9efaa 597
24d1723f
DG
598 rcu_read_lock();
599
bec39940
DG
600 cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
601 ret = lttng_ht_del(channels, &iter);
7bd39047
DG
602 assert(!ret);
603 call_rcu(&node->head, destroy_channel_rcu);
f6a9efaa 604 }
ed52805d 605
bec39940 606 lttng_ht_destroy(channels);
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607
608 rcu_read_unlock();
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609}
610
611/*
612 * Cleanup UST pid domain.
613 */
bec39940 614static void destroy_domain_pid(struct lttng_ht *ht)
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615{
616 int ret;
bec39940 617 struct lttng_ht_iter iter;
ed52805d 618 struct ltt_ust_domain_pid *dpid;
f6a9efaa 619
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620 cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) {
621 ret = lttng_ht_del(ht , &iter);
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622 assert(!ret);
623 destroy_channels(dpid->channels);
f6a9efaa 624 }
ed52805d 625
bec39940 626 lttng_ht_destroy(ht);
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627}
628
629/*
630 * Cleanup UST exec name domain.
631 */
bec39940 632static void destroy_domain_exec(struct lttng_ht *ht)
97ee3a89 633{
f6a9efaa 634 int ret;
bec39940 635 struct lttng_ht_iter iter;
ed52805d 636 struct ltt_ust_domain_exec *dexec;
f6a9efaa 637
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638 cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) {
639 ret = lttng_ht_del(ht , &iter);
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640 assert(!ret);
641 destroy_channels(dexec->channels);
f6a9efaa 642 }
ed52805d 643
bec39940 644 lttng_ht_destroy(ht);
f6a9efaa 645}
97ee3a89 646
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647/*
648 * Cleanup UST global domain.
649 */
650static void destroy_domain_global(struct ltt_ust_domain_global *dom)
651{
652 destroy_channels(dom->channels);
653}
97ee3a89 654
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655/*
656 * Cleanup ust session structure
657 */
658void trace_ust_destroy_session(struct ltt_ust_session *session)
659{
ed52805d 660 /* Extra protection */
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661 if (session == NULL) {
662 return;
663 }
664
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665 rcu_read_lock();
666
fc4705fe 667 DBG2("Trace UST destroy session %u", session->id);
f6a9efaa 668
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669 /* Cleaning up UST domain */
670 destroy_domain_global(&session->domain_global);
671 destroy_domain_pid(session->domain_pid);
672 destroy_domain_exec(session->domain_exec);
44d3bd01 673
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674 consumer_destroy_output(session->consumer);
675 consumer_destroy_output(session->tmp_consumer);
676
97ee3a89 677 free(session);
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678
679 rcu_read_unlock();
97ee3a89 680}
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