Commit | Line | Data |
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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8020ceb5 | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * Holds LTTng per-session event registry. |
8020ceb5 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b5234c06 | 10 | #include <stdio.h> |
d8d2416d | 11 | #include <assert.h> |
b5234c06 | 12 | #include <errno.h> |
d8d2416d FD |
13 | #include <limits.h> |
14 | #include <pthread.h> | |
f4681817 MD |
15 | #include <sys/shm.h> |
16 | #include <sys/ipc.h> | |
44c72f10 MD |
17 | #include <stdint.h> |
18 | #include <stddef.h> | |
28b12049 MD |
19 | #include <inttypes.h> |
20 | #include <time.h> | |
196ec2df | 21 | #include <stdbool.h> |
d8d2416d | 22 | #include <unistd.h> |
10544ee8 | 23 | #include <dlfcn.h> |
2ae57758 | 24 | #include <lttng/ust-endian.h> |
44c72f10 | 25 | |
d8d2416d | 26 | #include <urcu/arch.h> |
44c72f10 | 27 | #include <urcu/compiler.h> |
d8d2416d FD |
28 | #include <urcu/hlist.h> |
29 | #include <urcu/list.h> | |
44c72f10 | 30 | #include <urcu/uatomic.h> |
44c72f10 MD |
31 | |
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 | 34 | |
9d315d6d MJ |
35 | #include "common/logging.h" |
36 | #include "common/macros.h" | |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
38 | #include "common/ustcomm.h" |
39 | #include "common/ust-fd.h" | |
40 | #include "common/dynamic-type.h" | |
41 | #include "common/ust-context-provider.h" | |
44c72f10 | 42 | |
8f51c684 | 43 | #include "common/tracepoint.h" |
b8aa6f43 | 44 | #include "common/strutils.h" |
4d451c15 | 45 | #include "lttng-bytecode.h" |
8cd08025 | 46 | #include "common/tracer.h" |
7dd08bec | 47 | #include "lttng-tracer-core.h" |
cf73e0fe | 48 | #include "lttng-ust-statedump.h" |
51f804ec | 49 | #include "context-internal.h" |
36c52fff | 50 | #include "lib/lttng-ust/events.h" |
e4db8f98 MJ |
51 | #include "common/ringbuffer/shm.h" |
52 | #include "common/ringbuffer/frontend_types.h" | |
53 | #include "common/ringbuffer/frontend.h" | |
cdff92e0 | 54 | #include "common/counter/counter.h" |
e58e5ad5 | 55 | #include "common/jhash.h" |
d8d2416d | 56 | #include <lttng/ust-abi.h> |
4b4a1337 | 57 | #include "context-provider-internal.h" |
8165c8da MD |
58 | |
59 | /* | |
3327ac33 MD |
60 | * All operations within this file are called by the communication |
61 | * thread, under ust_lock protection. | |
8165c8da | 62 | */ |
8165c8da | 63 | |
b5234c06 | 64 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 65 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 66 | |
7753d283 | 67 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
68 | { |
69 | return &sessions; | |
70 | } | |
71 | ||
ba99fbe2 | 72 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 73 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 74 | |
e58095ef | 75 | static |
f69fe5fb | 76 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 77 | static |
f69fe5fb | 78 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 79 | static |
d8d2416d FD |
80 | void lttng_event_notifier_group_sync_enablers( |
81 | struct lttng_event_notifier_group *event_notifier_group); | |
82 | static | |
e58095ef MD |
83 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
84 | ||
5b4c6da4 MD |
85 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
86 | { | |
87 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
88 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
89 | return false; | |
90 | return true; | |
91 | } | |
92 | ||
93 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
94 | char *name) | |
95 | { | |
96 | strcpy(name, desc->probe_desc->provider_name); | |
97 | strcat(name, ":"); | |
98 | strcat(name, desc->event_name); | |
99 | } | |
100 | ||
c70585a3 MD |
101 | static |
102 | void lttng_event_enabler_unsync(struct lttng_event_enabler *event_enabler) | |
103 | { | |
104 | cds_list_move(&event_enabler->node, | |
105 | &event_enabler->chan->parent->session->priv->unsync_enablers_head); | |
106 | } | |
107 | ||
108 | static | |
109 | void lttng_session_unsync_enablers(struct lttng_ust_session *session) | |
110 | { | |
111 | cds_list_splice(&session->priv->sync_enablers_head, | |
112 | &session->priv->unsync_enablers_head); | |
113 | CDS_INIT_LIST_HEAD(&session->priv->sync_enablers_head); | |
114 | } | |
115 | ||
116 | static | |
117 | void lttng_event_notifier_enabler_unsync(struct lttng_event_notifier_enabler *event_notifier_enabler) | |
118 | { | |
119 | cds_list_move(&event_notifier_enabler->node, | |
120 | &event_notifier_enabler->group->unsync_enablers_head); | |
121 | } | |
122 | ||
123 | static | |
124 | void lttng_event_notifier_group_unsync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
125 | { | |
126 | cds_list_splice(&event_notifier_group->sync_enablers_head, | |
127 | &event_notifier_group->unsync_enablers_head); | |
128 | CDS_INIT_LIST_HEAD(&event_notifier_group->sync_enablers_head); | |
129 | } | |
130 | ||
6715d7d1 MD |
131 | /* |
132 | * Called with ust lock held. | |
133 | */ | |
134 | int lttng_session_active(void) | |
135 | { | |
bdb12629 | 136 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
137 | |
138 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 139 | if (iter->pub->active) |
6715d7d1 MD |
140 | return 1; |
141 | } | |
142 | return 0; | |
143 | } | |
144 | ||
e58095ef MD |
145 | static |
146 | int lttng_loglevel_match(int loglevel, | |
147 | unsigned int has_loglevel, | |
fd17d7ce | 148 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
149 | int req_loglevel) |
150 | { | |
e58095ef | 151 | if (!has_loglevel) |
612e9ce4 | 152 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
457a6b58 | 153 | switch (req_type) { |
fd17d7ce | 154 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 155 | if (loglevel <= req_loglevel |
612e9ce4 | 156 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
157 | return 1; |
158 | else | |
159 | return 0; | |
fd17d7ce | 160 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 161 | if (loglevel == req_loglevel |
612e9ce4 | 162 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
163 | return 1; |
164 | else | |
165 | return 0; | |
fd17d7ce | 166 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 167 | default: |
612e9ce4 | 168 | if (loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG) |
aacb3774 MD |
169 | return 1; |
170 | else | |
171 | return 0; | |
457a6b58 MD |
172 | } |
173 | } | |
174 | ||
f69fe5fb | 175 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 176 | { |
f69fe5fb | 177 | struct lttng_ust_session *session; |
bdb12629 | 178 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 179 | int i; |
8020ceb5 | 180 | |
f69fe5fb | 181 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
182 | if (!session) |
183 | return NULL; | |
f69fe5fb | 184 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
185 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
186 | if (!session_priv) { | |
53569322 MD |
187 | free(session); |
188 | return NULL; | |
189 | } | |
bdb12629 MD |
190 | session->priv = session_priv; |
191 | session_priv->pub = session; | |
192 | if (lttng_context_init_all(&session->priv->ctx)) { | |
193 | free(session_priv); | |
194 | free(session); | |
195 | return NULL; | |
196 | } | |
197 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
198 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
199 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
c70585a3 MD |
200 | CDS_INIT_LIST_HEAD(&session->priv->unsync_enablers_head); |
201 | CDS_INIT_LIST_HEAD(&session->priv->sync_enablers_head); | |
d56fa719 | 202 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 203 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 204 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
205 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
206 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
207 | return session; |
208 | } | |
209 | ||
ebabbf58 MD |
210 | struct lttng_counter *lttng_ust_counter_create( |
211 | const char *counter_transport_name, | |
212 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
213 | { | |
214 | struct lttng_counter_transport *counter_transport = NULL; | |
215 | struct lttng_counter *counter = NULL; | |
216 | ||
217 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
218 | if (!counter_transport) | |
219 | goto notransport; | |
220 | counter = zmalloc(sizeof(struct lttng_counter)); | |
221 | if (!counter) | |
222 | goto nomem; | |
223 | ||
224 | counter->ops = &counter_transport->ops; | |
225 | counter->transport = counter_transport; | |
226 | ||
227 | counter->counter = counter->ops->counter_create( | |
228 | number_dimensions, dimensions, 0, | |
229 | -1, 0, NULL, false); | |
230 | if (!counter->counter) { | |
231 | goto create_error; | |
232 | } | |
233 | ||
234 | return counter; | |
235 | ||
236 | create_error: | |
237 | free(counter); | |
238 | nomem: | |
239 | notransport: | |
240 | return NULL; | |
241 | } | |
242 | ||
243 | static | |
244 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
245 | { | |
246 | counter->ops->counter_destroy(counter->counter); | |
247 | free(counter); | |
248 | } | |
249 | ||
d8d2416d FD |
250 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
251 | { | |
252 | struct lttng_event_notifier_group *event_notifier_group; | |
253 | int i; | |
254 | ||
255 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
256 | if (!event_notifier_group) | |
257 | return NULL; | |
258 | ||
51f804ec FD |
259 | /* Add all contexts. */ |
260 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
261 | free(event_notifier_group); | |
262 | return NULL; | |
263 | } | |
264 | ||
c70585a3 MD |
265 | CDS_INIT_LIST_HEAD(&event_notifier_group->sync_enablers_head); |
266 | CDS_INIT_LIST_HEAD(&event_notifier_group->unsync_enablers_head); | |
d8d2416d FD |
267 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); |
268 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
269 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
270 | ||
271 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
272 | ||
273 | return event_notifier_group; | |
274 | } | |
275 | ||
74d81a6c MD |
276 | /* |
277 | * Only used internally at session destruction. | |
278 | */ | |
279 | static | |
e7bc0ef6 | 280 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 281 | { |
b5457df5 | 282 | struct lttng_ust_ring_buffer_channel *chan; |
74d81a6c MD |
283 | struct lttng_ust_shm_handle *handle; |
284 | ||
e7bc0ef6 | 285 | cds_list_del(<tng_chan->priv->node); |
0950190a | 286 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 287 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 288 | handle = chan->handle; |
74d81a6c | 289 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
290 | free(lttng_chan->parent); |
291 | free(lttng_chan->priv); | |
f0fde1c3 | 292 | free(lttng_chan); |
74d81a6c MD |
293 | } |
294 | ||
ac6b4ac6 | 295 | static |
ba99fbe2 | 296 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
297 | { |
298 | int ret; | |
4e48b5d2 | 299 | const struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 300 | |
ba99fbe2 MD |
301 | assert(event->priv->registered == 0); |
302 | desc = event->priv->desc; | |
34f7f142 MD |
303 | ret = lttng_ust_tp_probe_register_queue_release(desc->probe_desc->provider_name, |
304 | desc->event_name, | |
71ca4083 MD |
305 | desc->tp_class->probe_callback, |
306 | event, desc->tp_class->signature); | |
ac6b4ac6 MD |
307 | WARN_ON_ONCE(ret); |
308 | if (!ret) | |
ba99fbe2 | 309 | event->priv->registered = 1; |
ac6b4ac6 MD |
310 | } |
311 | ||
d8d2416d | 312 | static |
ba99fbe2 | 313 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
314 | { |
315 | int ret; | |
4e48b5d2 | 316 | const struct lttng_ust_event_desc *desc; |
d8d2416d | 317 | |
ba99fbe2 MD |
318 | assert(event->priv->registered == 1); |
319 | desc = event->priv->desc; | |
34f7f142 MD |
320 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->probe_desc->provider_name, |
321 | desc->event_name, | |
71ca4083 | 322 | desc->tp_class->probe_callback, |
ba99fbe2 | 323 | event); |
ac6b4ac6 MD |
324 | WARN_ON_ONCE(ret); |
325 | if (!ret) | |
ba99fbe2 | 326 | event->priv->registered = 0; |
ac6b4ac6 MD |
327 | } |
328 | ||
d8d2416d | 329 | static |
ba99fbe2 | 330 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 331 | { |
ba99fbe2 MD |
332 | if (event->priv->registered) |
333 | unregister_event(event); | |
d8d2416d FD |
334 | } |
335 | ||
f69fe5fb | 336 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 337 | { |
e7bc0ef6 | 338 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 339 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 340 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 341 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 342 | |
b5234c06 | 343 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 344 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 345 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 346 | } |
b653ddc1 | 347 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 348 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 349 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
c70585a3 MD |
350 | &session->priv->unsync_enablers_head, node) |
351 | lttng_event_enabler_destroy(event_enabler); | |
352 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, | |
353 | &session->priv->sync_enablers_head, node) | |
d871c65b | 354 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 355 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 356 | &session->priv->events_head, node) |
ba99fbe2 | 357 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 358 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 359 | &session->priv->enums_head, node) |
c785c634 | 360 | _lttng_enum_destroy(_enum); |
bdb12629 | 361 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 362 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
363 | cds_list_del(&session->priv->node); |
364 | lttng_destroy_context(session->priv->ctx); | |
365 | free(session->priv); | |
b5234c06 | 366 | free(session); |
8020ceb5 MD |
367 | } |
368 | ||
d8d2416d FD |
369 | void lttng_event_notifier_group_destroy( |
370 | struct lttng_event_notifier_group *event_notifier_group) | |
371 | { | |
372 | int close_ret; | |
373 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 374 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
375 | |
376 | if (!event_notifier_group) { | |
377 | return; | |
378 | } | |
379 | ||
ba99fbe2 | 380 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 381 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 382 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 383 | |
b653ddc1 | 384 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
385 | |
386 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
c70585a3 MD |
387 | &event_notifier_group->sync_enablers_head, node) |
388 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
389 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
390 | &event_notifier_group->unsync_enablers_head, node) | |
d8d2416d FD |
391 | lttng_event_notifier_enabler_destroy(notifier_enabler); |
392 | ||
ba99fbe2 | 393 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 394 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 395 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 396 | |
ebabbf58 MD |
397 | if (event_notifier_group->error_counter) |
398 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
399 | ||
400 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
401 | |
402 | lttng_ust_lock_fd_tracker(); | |
403 | close_ret = close(event_notifier_group->notification_fd); | |
404 | if (!close_ret) { | |
405 | lttng_ust_delete_fd_from_tracker( | |
406 | event_notifier_group->notification_fd); | |
407 | } else { | |
408 | PERROR("close"); | |
409 | abort(); | |
410 | } | |
411 | lttng_ust_unlock_fd_tracker(); | |
412 | ||
413 | cds_list_del(&event_notifier_group->node); | |
bd515d28 | 414 | lttng_destroy_context(event_notifier_group->ctx); |
d8d2416d FD |
415 | free(event_notifier_group); |
416 | } | |
417 | ||
d871c65b FD |
418 | static |
419 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
420 | { | |
ab249ecf | 421 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
422 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
423 | ||
424 | if (!enabler) { | |
425 | return; | |
426 | } | |
427 | ||
428 | /* Destroy filter bytecode */ | |
429 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
430 | &enabler->filter_bytecode_head, node) { | |
431 | free(filter_node); | |
432 | } | |
433 | ||
434 | /* Destroy excluders */ | |
435 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
436 | &enabler->excluder_head, node) { | |
437 | free(excluder_node); | |
438 | } | |
439 | } | |
440 | ||
d8d2416d FD |
441 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
442 | { | |
443 | if (!event_notifier_enabler) { | |
444 | return; | |
445 | } | |
446 | ||
447 | cds_list_del(&event_notifier_enabler->node); | |
448 | ||
449 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
450 | ||
451 | free(event_notifier_enabler); | |
452 | } | |
453 | ||
53569322 | 454 | static |
4e48b5d2 | 455 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 456 | struct lttng_ust_session *session) |
53569322 MD |
457 | { |
458 | const char *enum_name = desc->name; | |
459 | struct lttng_enum *_enum; | |
460 | struct cds_hlist_head *head; | |
53569322 MD |
461 | int ret = 0; |
462 | size_t name_len = strlen(enum_name); | |
463 | uint32_t hash; | |
464 | int notify_socket; | |
465 | ||
b33b46f7 | 466 | /* Check if this enum is already registered for this session. */ |
53569322 | 467 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 468 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
469 | |
470 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
471 | if (_enum) { | |
472 | ret = -EEXIST; | |
473 | goto exist; | |
53569322 MD |
474 | } |
475 | ||
bdb12629 | 476 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
477 | if (notify_socket < 0) { |
478 | ret = notify_socket; | |
479 | goto socket_error; | |
480 | } | |
481 | ||
482 | _enum = zmalloc(sizeof(*_enum)); | |
483 | if (!_enum) { | |
484 | ret = -ENOMEM; | |
485 | goto cache_error; | |
486 | } | |
487 | _enum->session = session; | |
488 | _enum->desc = desc; | |
489 | ||
490 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 491 | session->priv->objd, |
53569322 MD |
492 | enum_name, |
493 | desc->nr_entries, | |
494 | desc->entries, | |
495 | &_enum->id); | |
496 | if (ret < 0) { | |
497 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
498 | goto sessiond_register_error; | |
499 | } | |
bdb12629 | 500 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
501 | cds_hlist_add_head(&_enum->hlist, head); |
502 | return 0; | |
503 | ||
504 | sessiond_register_error: | |
505 | free(_enum); | |
506 | cache_error: | |
507 | socket_error: | |
508 | exist: | |
509 | return ret; | |
510 | } | |
511 | ||
512 | static | |
4e48b5d2 | 513 | int lttng_create_enum_check(const struct lttng_ust_type_common *type, |
f69fe5fb | 514 | struct lttng_ust_session *session) |
53569322 | 515 | { |
a084756d MD |
516 | switch (type->type) { |
517 | case lttng_ust_type_enum: | |
218deb69 | 518 | { |
4e48b5d2 | 519 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
520 | int ret; |
521 | ||
a084756d | 522 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
523 | ret = lttng_enum_create(enum_desc, session); |
524 | if (ret && ret != -EEXIST) { | |
525 | DBG("Unable to create enum error: (%d)", ret); | |
526 | return ret; | |
527 | } | |
528 | break; | |
529 | } | |
a084756d | 530 | case lttng_ust_type_dynamic: |
53569322 | 531 | { |
4e48b5d2 MD |
532 | const struct lttng_ust_event_field *tag_field_generic; |
533 | const struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
534 | int ret; |
535 | ||
536 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 537 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
538 | ret = lttng_enum_create(enum_desc, session); |
539 | if (ret && ret != -EEXIST) { | |
540 | DBG("Unable to create enum error: (%d)", ret); | |
541 | return ret; | |
542 | } | |
543 | break; | |
544 | } | |
545 | default: | |
546 | /* TODO: nested types when they become supported. */ | |
547 | break; | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
552 | static | |
553 | int lttng_create_all_event_enums(size_t nr_fields, | |
3d33ca1d | 554 | const struct lttng_ust_event_field * const *event_fields, |
f69fe5fb | 555 | struct lttng_ust_session *session) |
53569322 MD |
556 | { |
557 | size_t i; | |
558 | int ret; | |
559 | ||
560 | /* For each field, ensure enum is part of the session. */ | |
561 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 562 | const struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
563 | |
564 | ret = lttng_create_enum_check(type, session); | |
565 | if (ret) | |
566 | return ret; | |
567 | } | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static | |
572 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
4e48b5d2 | 573 | struct lttng_ust_ctx_field *ctx_fields, |
f69fe5fb | 574 | struct lttng_ust_session *session) |
53569322 MD |
575 | { |
576 | size_t i; | |
577 | int ret; | |
578 | ||
579 | /* For each field, ensure enum is part of the session. */ | |
580 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 581 | const struct lttng_ust_type_common *type = ctx_fields[i].event_field->type; |
53569322 MD |
582 | |
583 | ret = lttng_create_enum_check(type, session); | |
584 | if (ret) | |
585 | return ret; | |
586 | } | |
587 | return 0; | |
588 | } | |
589 | ||
710b8ee3 MD |
590 | /* |
591 | * Ensure that a state-dump will be performed for this session at the end | |
592 | * of the current handle_message(). | |
593 | */ | |
f69fe5fb | 594 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 595 | { |
bdb12629 MD |
596 | session->priv->statedump_pending = 1; |
597 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
598 | return 0; |
599 | } | |
53569322 | 600 | |
f69fe5fb | 601 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
602 | { |
603 | int ret = 0; | |
e7bc0ef6 | 604 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 605 | int notify_socket; |
8020ceb5 | 606 | |
8020ceb5 MD |
607 | if (session->active) { |
608 | ret = -EBUSY; | |
609 | goto end; | |
610 | } | |
611 | ||
bdb12629 | 612 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
613 | if (notify_socket < 0) |
614 | return notify_socket; | |
615 | ||
ac6b4ac6 | 616 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 617 | session->priv->tstate = 1; |
e58095ef | 618 | |
3ff7660f | 619 | /* We need to sync enablers with session before activation. */ |
d871c65b | 620 | lttng_session_sync_event_enablers(session); |
3ff7660f | 621 | |
8020ceb5 MD |
622 | /* |
623 | * Snapshot the number of events per channel to know the type of header | |
624 | * we need to use. | |
625 | */ | |
bdb12629 | 626 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 627 | struct lttng_ust_ctx *ctx; |
4e48b5d2 | 628 | struct lttng_ust_ctx_field *fields = NULL; |
32ce8569 | 629 | size_t nr_fields = 0; |
6ca18e66 | 630 | uint32_t chan_id; |
32ce8569 MD |
631 | |
632 | /* don't change it if session stop/restart */ | |
8020ceb5 | 633 | if (chan->header_type) |
32ce8569 | 634 | continue; |
0950190a | 635 | ctx = chan->ctx; |
32ce8569 MD |
636 | if (ctx) { |
637 | nr_fields = ctx->nr_fields; | |
83e43212 | 638 | fields = ctx->fields; |
53569322 MD |
639 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
640 | session); | |
641 | if (ret < 0) { | |
642 | DBG("Error (%d) adding enum to session", ret); | |
643 | return ret; | |
644 | } | |
32ce8569 MD |
645 | } |
646 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 647 | session, |
bdb12629 | 648 | session->priv->objd, |
e7bc0ef6 | 649 | chan->parent.objd, |
32ce8569 MD |
650 | nr_fields, |
651 | fields, | |
6ca18e66 | 652 | &chan_id, |
32ce8569 | 653 | &chan->header_type); |
b869b5ae MD |
654 | if (ret) { |
655 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 656 | return ret; |
b869b5ae | 657 | } |
6ca18e66 MD |
658 | if (chan_id != chan->id) { |
659 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
660 | chan_id, chan->id); | |
661 | return -EINVAL; | |
662 | } | |
8020ceb5 MD |
663 | } |
664 | ||
ac6b4ac6 | 665 | /* Set atomically the state to "active" */ |
b5234c06 | 666 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 667 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 668 | |
710b8ee3 MD |
669 | ret = lttng_session_statedump(session); |
670 | if (ret) | |
671 | return ret; | |
8020ceb5 | 672 | end: |
8020ceb5 MD |
673 | return ret; |
674 | } | |
675 | ||
f69fe5fb | 676 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
677 | { |
678 | int ret = 0; | |
679 | ||
8020ceb5 MD |
680 | if (!session->active) { |
681 | ret = -EBUSY; | |
682 | goto end; | |
683 | } | |
ac6b4ac6 | 684 | /* Set atomically the state to "inactive" */ |
b5234c06 | 685 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
686 | |
687 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 688 | session->priv->tstate = 0; |
d871c65b | 689 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 690 | end: |
8020ceb5 MD |
691 | return ret; |
692 | } | |
693 | ||
e7bc0ef6 | 694 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 695 | { |
ac6b4ac6 | 696 | int ret = 0; |
976fe9ea | 697 | |
e7bc0ef6 | 698 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
699 | ret = -EBUSY; |
700 | goto end; | |
701 | } | |
702 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
703 | lttng_channel->priv->tstate = 1; |
704 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 705 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 706 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
707 | end: |
708 | return ret; | |
976fe9ea MD |
709 | } |
710 | ||
e7bc0ef6 | 711 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 712 | { |
ac6b4ac6 | 713 | int ret = 0; |
976fe9ea | 714 | |
e7bc0ef6 | 715 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
716 | ret = -EBUSY; |
717 | goto end; | |
718 | } | |
719 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 720 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 721 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
722 | lttng_channel->priv->tstate = 0; |
723 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
724 | end: |
725 | return ret; | |
976fe9ea MD |
726 | } |
727 | ||
fb470188 FD |
728 | static inline |
729 | struct cds_hlist_head *borrow_hash_table_bucket( | |
730 | struct cds_hlist_head *hash_table, | |
731 | unsigned int hash_table_size, | |
4e48b5d2 | 732 | const struct lttng_ust_event_desc *desc) |
fb470188 | 733 | { |
5b4c6da4 | 734 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
735 | size_t name_len; |
736 | uint32_t hash; | |
737 | ||
5b4c6da4 MD |
738 | lttng_ust_format_event_name(desc, name); |
739 | name_len = strlen(name); | |
fb470188 | 740 | |
5b4c6da4 | 741 | hash = jhash(name, name_len, 0); |
fb470188 FD |
742 | return &hash_table[hash & (hash_table_size - 1)]; |
743 | } | |
744 | ||
8020ceb5 MD |
745 | /* |
746 | * Supports event creation while tracing session is active. | |
747 | */ | |
e58095ef | 748 | static |
4e48b5d2 | 749 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 750 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 751 | { |
5b4c6da4 | 752 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
753 | struct lttng_ust_event_recorder *event_recorder; |
754 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 755 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 756 | struct cds_hlist_head *head; |
576599a0 | 757 | int ret = 0; |
32ce8569 MD |
758 | int notify_socket, loglevel; |
759 | const char *uri; | |
8020ceb5 | 760 | |
e7bc0ef6 | 761 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 762 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 763 | |
bdb12629 | 764 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
765 | if (notify_socket < 0) { |
766 | ret = notify_socket; | |
767 | goto socket_error; | |
768 | } | |
769 | ||
71ca4083 | 770 | ret = lttng_create_all_event_enums(desc->tp_class->nr_fields, desc->tp_class->fields, |
53569322 | 771 | session); |
c785c634 MD |
772 | if (ret < 0) { |
773 | DBG("Error (%d) adding enum to session", ret); | |
774 | goto create_enum_error; | |
775 | } | |
776 | ||
457a6b58 MD |
777 | /* |
778 | * Check if loglevel match. Refuse to connect event if not. | |
779 | */ | |
2e70391c MD |
780 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
781 | if (!event_recorder) { | |
576599a0 | 782 | ret = -ENOMEM; |
8020ceb5 | 783 | goto cache_error; |
576599a0 | 784 | } |
2e70391c | 785 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 786 | |
7ee76145 | 787 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 788 | if (!event_recorder->parent) { |
80333dfa MD |
789 | ret = -ENOMEM; |
790 | goto parent_error; | |
791 | } | |
7ee76145 | 792 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 793 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 794 | event_recorder->parent->child = event_recorder; |
80333dfa | 795 | |
2e70391c MD |
796 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
797 | if (!event_recorder_priv) { | |
68bb7559 MD |
798 | ret = -ENOMEM; |
799 | goto priv_error; | |
800 | } | |
2e70391c MD |
801 | event_recorder->priv = event_recorder_priv; |
802 | event_recorder_priv->pub = event_recorder; | |
803 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
804 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 805 | |
2e70391c | 806 | event_recorder->chan = chan; |
e58095ef | 807 | |
ac6b4ac6 | 808 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 809 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
810 | event_recorder->parent->enabled = 0; |
811 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 812 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
813 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
814 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
815 | |
816 | if (desc->loglevel) | |
d7b6eb89 | 817 | loglevel = *(*desc->loglevel); |
32ce8569 | 818 | else |
612e9ce4 | 819 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
dc11f93f MD |
820 | if (desc->model_emf_uri) |
821 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
822 | else |
823 | uri = NULL; | |
824 | ||
5b4c6da4 MD |
825 | lttng_ust_format_event_name(desc, name); |
826 | ||
13b21cd6 MD |
827 | /* Fetch event ID from sessiond */ |
828 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 829 | session, |
bdb12629 | 830 | session->priv->objd, |
e7bc0ef6 | 831 | chan->priv->parent.objd, |
5b4c6da4 | 832 | name, |
13b21cd6 | 833 | loglevel, |
71ca4083 MD |
834 | desc->tp_class->signature, |
835 | desc->tp_class->nr_fields, | |
836 | desc->tp_class->fields, | |
13b21cd6 | 837 | uri, |
8936b6c0 | 838 | &event_recorder->priv->id); |
13b21cd6 MD |
839 | if (ret < 0) { |
840 | DBG("Error (%d) registering event to sessiond", ret); | |
841 | goto sessiond_register_error; | |
32ce8569 | 842 | } |
2b213b16 | 843 | |
e7bc0ef6 | 844 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 845 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 846 | return 0; |
8020ceb5 | 847 | |
32ce8569 | 848 | sessiond_register_error: |
2e70391c | 849 | free(event_recorder_priv); |
68bb7559 | 850 | priv_error: |
2e70391c | 851 | free(event_recorder->parent); |
80333dfa | 852 | parent_error: |
2e70391c | 853 | free(event_recorder); |
8020ceb5 | 854 | cache_error: |
c785c634 | 855 | create_enum_error: |
32ce8569 | 856 | socket_error: |
576599a0 | 857 | return ret; |
8020ceb5 MD |
858 | } |
859 | ||
d8d2416d | 860 | static |
4e48b5d2 | 861 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 862 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
863 | struct lttng_event_notifier_group *event_notifier_group) |
864 | { | |
d7d45c0d | 865 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 866 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
867 | struct cds_hlist_head *head; |
868 | int ret = 0; | |
869 | ||
870 | /* | |
871 | * Get the hashtable bucket the created lttng_event_notifier object | |
872 | * should be inserted. | |
873 | */ | |
874 | head = borrow_hash_table_bucket( | |
875 | event_notifier_group->event_notifiers_ht.table, | |
876 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
877 | ||
d7d45c0d | 878 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
879 | if (!event_notifier) { |
880 | ret = -ENOMEM; | |
881 | goto error; | |
882 | } | |
d7d45c0d | 883 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 884 | |
115db533 MD |
885 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
886 | if (!event_notifier->parent) { | |
887 | ret = -ENOMEM; | |
888 | goto parent_error; | |
889 | } | |
890 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 891 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 892 | event_notifier->parent->child = event_notifier; |
115db533 MD |
893 | |
894 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
895 | if (!event_notifier_priv) { | |
896 | ret = -ENOMEM; | |
897 | goto priv_error; | |
898 | } | |
899 | event_notifier->priv = event_notifier_priv; | |
900 | event_notifier_priv->pub = event_notifier; | |
901 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
902 | event_notifier_priv->parent.pub = event_notifier->parent; | |
903 | ||
904 | event_notifier_priv->group = event_notifier_group; | |
905 | event_notifier_priv->parent.user_token = token; | |
906 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
907 | |
908 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 909 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
910 | event_notifier->parent->enabled = 0; |
911 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 912 | |
a2e4d05e MD |
913 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
914 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
915 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
916 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 917 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 918 | |
115db533 | 919 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 920 | &event_notifier_group->event_notifiers_head); |
115db533 | 921 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
922 | |
923 | return 0; | |
924 | ||
115db533 MD |
925 | priv_error: |
926 | free(event_notifier->parent); | |
927 | parent_error: | |
928 | free(event_notifier); | |
d8d2416d FD |
929 | error: |
930 | return ret; | |
931 | } | |
932 | ||
e58095ef | 933 | static |
4e48b5d2 | 934 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
935 | struct lttng_enabler *enabler) |
936 | { | |
5b4c6da4 | 937 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 938 | int loglevel = 0; |
7e2e405c | 939 | unsigned int has_loglevel = 0; |
e58095ef | 940 | |
5b4c6da4 | 941 | lttng_ust_format_event_name(desc, name); |
e450e339 | 942 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 943 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 944 | name, SIZE_MAX)) |
e58095ef MD |
945 | return 0; |
946 | if (desc->loglevel) { | |
947 | loglevel = *(*desc->loglevel); | |
948 | has_loglevel = 1; | |
949 | } | |
950 | if (!lttng_loglevel_match(loglevel, | |
951 | has_loglevel, | |
952 | enabler->event_param.loglevel_type, | |
953 | enabler->event_param.loglevel)) | |
954 | return 0; | |
955 | return 1; | |
956 | } | |
957 | ||
958 | static | |
4e48b5d2 | 959 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
960 | struct lttng_enabler *enabler) |
961 | { | |
5b4c6da4 | 962 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
963 | int loglevel = 0; |
964 | unsigned int has_loglevel = 0; | |
965 | ||
5b4c6da4 | 966 | lttng_ust_format_event_name(desc, name); |
e450e339 | 967 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 968 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
969 | return 0; |
970 | if (desc->loglevel) { | |
971 | loglevel = *(*desc->loglevel); | |
972 | has_loglevel = 1; | |
973 | } | |
974 | if (!lttng_loglevel_match(loglevel, | |
975 | has_loglevel, | |
976 | enabler->event_param.loglevel_type, | |
977 | enabler->event_param.loglevel)) | |
978 | return 0; | |
979 | return 1; | |
980 | } | |
981 | ||
982 | static | |
4e48b5d2 | 983 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
984 | struct lttng_enabler *enabler) |
985 | { | |
e450e339 FD |
986 | switch (enabler->format_type) { |
987 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
988 | { |
989 | struct lttng_ust_excluder_node *excluder; | |
990 | ||
991 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
992 | return 0; | |
993 | } | |
994 | ||
995 | /* | |
996 | * If the matching event matches with an excluder, | |
997 | * return 'does not match' | |
998 | */ | |
999 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
1000 | int count; | |
1001 | ||
1002 | for (count = 0; count < excluder->excluder.count; count++) { | |
1003 | int len; | |
1004 | char *excluder_name; | |
1005 | ||
1006 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
1007 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
1008 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
1009 | if (len > 0) { |
1010 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
1011 | ||
1012 | lttng_ust_format_event_name(desc, name); | |
1013 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
1014 | return 0; | |
1015 | } | |
1016 | } | |
ed5b5bbd JI |
1017 | } |
1018 | } | |
196ec2df | 1019 | return 1; |
ed5b5bbd | 1020 | } |
e450e339 | 1021 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
1022 | return lttng_desc_match_event_enabler(desc, enabler); |
1023 | default: | |
1024 | return -EINVAL; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | static | |
d871c65b | 1029 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 1030 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 1031 | { |
2e70391c | 1032 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 1033 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 1034 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
1035 | return 1; |
1036 | else | |
1037 | return 0; | |
e58095ef MD |
1038 | } |
1039 | ||
d8d2416d FD |
1040 | static |
1041 | int lttng_event_notifier_enabler_match_event_notifier( | |
1042 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1043 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1044 | { |
115db533 | 1045 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1046 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1047 | ||
115db533 MD |
1048 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1049 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1050 | return 1; |
1051 | else | |
1052 | return 0; | |
1053 | } | |
1054 | ||
e58095ef | 1055 | static |
d871c65b FD |
1056 | struct lttng_enabler_ref *lttng_enabler_ref( |
1057 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1058 | struct lttng_enabler *enabler) |
1059 | { | |
1060 | struct lttng_enabler_ref *enabler_ref; | |
1061 | ||
d871c65b | 1062 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1063 | if (enabler_ref->ref == enabler) |
1064 | return enabler_ref; | |
1065 | } | |
1066 | return NULL; | |
1067 | } | |
1068 | ||
8020ceb5 | 1069 | /* |
e58095ef MD |
1070 | * Create struct lttng_event if it is missing and present in the list of |
1071 | * tracepoint probes. | |
8020ceb5 | 1072 | */ |
e58095ef | 1073 | static |
ba99fbe2 | 1074 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1075 | { |
e7bc0ef6 | 1076 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
4e48b5d2 MD |
1077 | struct lttng_ust_registered_probe *reg_probe; |
1078 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1079 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1080 | int i; |
1081 | struct cds_list_head *probe_list; | |
1082 | ||
1083 | probe_list = lttng_get_probe_list_head(); | |
1084 | /* | |
1085 | * For each probe event, if we find that a probe event matches | |
1086 | * our enabler, create an associated lttng_event if not | |
1087 | * already present. | |
1088 | */ | |
4e48b5d2 MD |
1089 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1090 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1091 | ||
e58095ef | 1092 | for (i = 0; i < probe_desc->nr_events; i++) { |
98a97f24 FD |
1093 | int ret; |
1094 | bool found = false; | |
d56fa719 MD |
1095 | struct cds_hlist_head *head; |
1096 | struct cds_hlist_node *node; | |
e58095ef MD |
1097 | |
1098 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1099 | if (!lttng_desc_match_enabler(desc, |
1100 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1101 | continue; |
1102 | ||
fb470188 | 1103 | head = borrow_hash_table_bucket( |
bdb12629 | 1104 | session->priv->events_ht.table, |
fb470188 FD |
1105 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1106 | ||
2e70391c MD |
1107 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1108 | if (event_recorder_priv->parent.desc == desc | |
1109 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1110 | found = true; |
3140bffe FD |
1111 | break; |
1112 | } | |
e58095ef MD |
1113 | } |
1114 | if (found) | |
1115 | continue; | |
1116 | ||
1117 | /* | |
1118 | * We need to create an event for this | |
1119 | * event probe. | |
1120 | */ | |
2e70391c | 1121 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1122 | event_enabler->chan); |
e58095ef | 1123 | if (ret) { |
5b4c6da4 MD |
1124 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1125 | probe_desc->provider_name, | |
1126 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1127 | } |
8165c8da | 1128 | } |
8020ceb5 | 1129 | } |
8020ceb5 MD |
1130 | } |
1131 | ||
a44d07da | 1132 | static |
4e48b5d2 | 1133 | void probe_provider_event_for_each(const struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1134 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1135 | { |
1136 | struct cds_hlist_node *node, *tmp_node; | |
1137 | struct cds_list_head *sessionsp; | |
a44d07da | 1138 | unsigned int i; |
35ac38cb FD |
1139 | |
1140 | /* Get handle on list of sessions. */ | |
7753d283 | 1141 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1142 | |
1143 | /* | |
a44d07da FD |
1144 | * Iterate over all events in the probe provider descriptions and |
1145 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1146 | */ |
1147 | for (i = 0; i < provider_desc->nr_events; i++) { | |
4e48b5d2 | 1148 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1149 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1150 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1151 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1152 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1153 | struct cds_hlist_head *head; |
35ac38cb FD |
1154 | |
1155 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1156 | |
a44d07da FD |
1157 | /* |
1158 | * Iterate over all session to find the current event | |
1159 | * description. | |
1160 | */ | |
bdb12629 | 1161 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1162 | /* |
a44d07da FD |
1163 | * Get the list of events in the hashtable bucket and |
1164 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1165 | */ |
fb470188 | 1166 | head = borrow_hash_table_bucket( |
bdb12629 | 1167 | session_priv->events_ht.table, |
fb470188 FD |
1168 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1169 | ||
2e70391c MD |
1170 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1171 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1172 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1173 | break; |
1174 | } | |
1175 | } | |
1176 | } | |
d8d2416d FD |
1177 | |
1178 | /* | |
1179 | * Iterate over all event_notifier groups to find the current event | |
1180 | * description. | |
1181 | */ | |
1182 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1183 | /* | |
1184 | * Get the list of event_notifiers in the hashtable bucket and | |
1185 | * iterate to find the event_notifier matching this | |
1186 | * descriptor. | |
1187 | */ | |
1188 | head = borrow_hash_table_bucket( | |
1189 | event_notifier_group->event_notifiers_ht.table, | |
1190 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1191 | ||
115db533 MD |
1192 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1193 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1194 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1195 | break; |
1196 | } | |
1197 | } | |
1198 | } | |
35ac38cb | 1199 | } |
a44d07da FD |
1200 | } |
1201 | ||
1202 | static | |
ba99fbe2 | 1203 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1204 | { |
a44d07da | 1205 | |
ba99fbe2 MD |
1206 | switch (event->type) { |
1207 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1208 | { | |
1209 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1210 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1211 | unsigned int i; |
1212 | ||
1213 | /* Destroy enums of the current event. */ | |
71ca4083 | 1214 | for (i = 0; i < event_recorder->parent->priv->desc->tp_class->nr_fields; i++) { |
4e48b5d2 MD |
1215 | const struct lttng_ust_enum_desc *enum_desc; |
1216 | const struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1217 | struct lttng_enum *curr_enum; |
1218 | ||
71ca4083 | 1219 | field = event_recorder->parent->priv->desc->tp_class->fields[i]; |
a084756d MD |
1220 | switch (field->type->type) { |
1221 | case lttng_ust_type_enum: | |
1222 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1223 | break; |
1224 | default: | |
1225 | continue; | |
1226 | } | |
a44d07da | 1227 | |
ba99fbe2 MD |
1228 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1229 | if (curr_enum) { | |
1230 | _lttng_enum_destroy(curr_enum); | |
1231 | } | |
a44d07da | 1232 | } |
ba99fbe2 MD |
1233 | break; |
1234 | } | |
1235 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1236 | break; | |
1237 | default: | |
1238 | abort(); | |
a44d07da | 1239 | } |
a44d07da | 1240 | /* Destroy event. */ |
ba99fbe2 | 1241 | _lttng_event_destroy(event); |
a44d07da FD |
1242 | } |
1243 | ||
1244 | /* | |
1245 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1246 | * the probe provider descriptor received as argument. Must me called with the | |
1247 | * ust_lock held. | |
1248 | */ | |
1249 | void lttng_probe_provider_unregister_events( | |
4e48b5d2 | 1250 | const struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1251 | { |
1252 | /* | |
1253 | * Iterate over all events in the probe provider descriptions and sessions | |
1254 | * to queue the unregistration of the events. | |
1255 | */ | |
ba99fbe2 | 1256 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1257 | |
1258 | /* Wait for grace period. */ | |
b653ddc1 | 1259 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1260 | /* Prune the unregistration queue. */ |
d10a2205 | 1261 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1262 | |
1263 | /* | |
1264 | * It is now safe to destroy the events and remove them from the event list | |
1265 | * and hashtables. | |
1266 | */ | |
ba99fbe2 | 1267 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1268 | } |
1269 | ||
8020ceb5 | 1270 | /* |
d8d2416d | 1271 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1272 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1273 | */ |
1274 | static | |
ba99fbe2 | 1275 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1276 | { |
e7bc0ef6 | 1277 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1278 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1279 | |
d871c65b | 1280 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1281 | goto end; |
1282 | ||
e58095ef | 1283 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1284 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1285 | |
1286 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1287 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1288 | struct lttng_enabler_ref *enabler_ref; |
1289 | ||
2e70391c | 1290 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1291 | continue; |
1292 | ||
2e70391c | 1293 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1294 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1295 | if (!enabler_ref) { |
1296 | /* | |
1297 | * If no backward ref, create it. | |
1298 | * Add backward ref from event to enabler. | |
1299 | */ | |
1300 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1301 | if (!enabler_ref) | |
1302 | return -ENOMEM; | |
d871c65b FD |
1303 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1304 | event_enabler); | |
e58095ef | 1305 | cds_list_add(&enabler_ref->node, |
2e70391c | 1306 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1307 | } |
e58095ef MD |
1308 | |
1309 | /* | |
1310 | * Link filter bytecodes if not linked yet. | |
1311 | */ | |
2e70391c | 1312 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1313 | &session->priv->ctx, |
a2e4d05e | 1314 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1315 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1316 | |
1317 | /* TODO: merge event context. */ | |
1318 | } | |
de713d8a | 1319 | end: |
e58095ef MD |
1320 | return 0; |
1321 | } | |
1322 | ||
1323 | /* | |
1324 | * Called at library load: connect the probe on all enablers matching | |
1325 | * this event. | |
5f733922 | 1326 | * Called with session mutex held. |
e58095ef | 1327 | */ |
5f733922 | 1328 | int lttng_fix_pending_events(void) |
e58095ef | 1329 | { |
bdb12629 | 1330 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1331 | |
bdb12629 | 1332 | cds_list_for_each_entry(session_priv, &sessions, node) { |
c70585a3 MD |
1333 | /* |
1334 | * New probes have appeared, we need to re-sync all | |
1335 | * enablers. | |
1336 | */ | |
1337 | lttng_session_unsync_enablers(session_priv->pub); | |
bdb12629 | 1338 | lttng_session_lazy_sync_event_enablers(session_priv->pub); |
8020ceb5 | 1339 | } |
e58095ef MD |
1340 | return 0; |
1341 | } | |
1342 | ||
d8d2416d FD |
1343 | int lttng_fix_pending_event_notifiers(void) |
1344 | { | |
1345 | struct lttng_event_notifier_group *event_notifier_group; | |
1346 | ||
1347 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
c70585a3 MD |
1348 | /* |
1349 | * New probes have appeared, we need to re-sync all | |
1350 | * enablers. | |
1351 | */ | |
1352 | lttng_event_notifier_group_unsync_enablers(event_notifier_group); | |
d8d2416d FD |
1353 | lttng_event_notifier_group_sync_enablers(event_notifier_group); |
1354 | } | |
1355 | return 0; | |
1356 | } | |
1357 | ||
246be17e | 1358 | /* |
37dddb65 MD |
1359 | * For each session of the owner thread, execute pending statedump. |
1360 | * Only dump state for the sessions owned by the caller thread, because | |
1361 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1362 | */ |
3327ac33 | 1363 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1364 | { |
bdb12629 | 1365 | struct lttng_ust_session_private *session_priv; |
246be17e | 1366 | |
37dddb65 | 1367 | /* Execute state dump */ |
cf73e0fe | 1368 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1369 | |
1370 | /* Clear pending state dump */ | |
3327ac33 MD |
1371 | if (ust_lock()) { |
1372 | goto end; | |
1373 | } | |
bdb12629 MD |
1374 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1375 | if (session_priv->owner != owner) | |
37dddb65 | 1376 | continue; |
bdb12629 | 1377 | if (!session_priv->statedump_pending) |
37dddb65 | 1378 | continue; |
bdb12629 | 1379 | session_priv->statedump_pending = 0; |
246be17e | 1380 | } |
3327ac33 | 1381 | end: |
37dddb65 | 1382 | ust_unlock(); |
3327ac33 | 1383 | return; |
246be17e PW |
1384 | } |
1385 | ||
e58095ef | 1386 | static |
ba99fbe2 | 1387 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1388 | { |
1389 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1390 | ||
ba99fbe2 | 1391 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1392 | /* Free event enabler refs */ |
1393 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1394 | &event->priv->enablers_ref_head, node) |
e58095ef | 1395 | free(enabler_ref); |
ba99fbe2 MD |
1396 | |
1397 | switch (event->type) { | |
1398 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1399 | { | |
1400 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1401 | ||
1402 | /* Remove from event list. */ | |
1403 | cds_list_del(&event_recorder->priv->node); | |
1404 | /* Remove from event hash table. */ | |
1405 | cds_hlist_del(&event_recorder->priv->hlist); | |
1406 | ||
a40b5b8c | 1407 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1408 | free(event_recorder->parent); |
1409 | free(event_recorder->priv); | |
1410 | free(event_recorder); | |
1411 | break; | |
1412 | } | |
1413 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1414 | { | |
1415 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1416 | ||
1417 | /* Remove from event list. */ | |
1418 | cds_list_del(&event_notifier->priv->node); | |
1419 | /* Remove from event hash table. */ | |
1420 | cds_hlist_del(&event_notifier->priv->hlist); | |
1421 | ||
1422 | free(event_notifier->priv); | |
1423 | free(event_notifier->parent); | |
1424 | free(event_notifier); | |
1425 | break; | |
1426 | } | |
1427 | default: | |
1428 | abort(); | |
1429 | } | |
8020ceb5 MD |
1430 | } |
1431 | ||
c785c634 MD |
1432 | static |
1433 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1434 | { | |
1435 | cds_list_del(&_enum->node); | |
35ac38cb | 1436 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1437 | free(_enum); |
1438 | } | |
1439 | ||
fd17d7ce | 1440 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1441 | { |
bdb12629 | 1442 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1443 | |
bdb12629 MD |
1444 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1445 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1446 | } |
457a6b58 | 1447 | |
e58095ef MD |
1448 | /* |
1449 | * Enabler management. | |
1450 | */ | |
d871c65b FD |
1451 | struct lttng_event_enabler *lttng_event_enabler_create( |
1452 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1453 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1454 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1455 | { |
d871c65b | 1456 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1457 | |
d871c65b FD |
1458 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1459 | if (!event_enabler) | |
e58095ef | 1460 | return NULL; |
d871c65b FD |
1461 | event_enabler->base.format_type = format_type; |
1462 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1463 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1464 | memcpy(&event_enabler->base.event_param, event_param, | |
1465 | sizeof(event_enabler->base.event_param)); | |
1466 | event_enabler->chan = chan; | |
e58095ef | 1467 | /* ctx left NULL */ |
d871c65b | 1468 | event_enabler->base.enabled = 0; |
c70585a3 | 1469 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->unsync_enablers_head); |
e7bc0ef6 | 1470 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b FD |
1471 | |
1472 | return event_enabler; | |
457a6b58 MD |
1473 | } |
1474 | ||
d8d2416d FD |
1475 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1476 | struct lttng_event_notifier_group *event_notifier_group, | |
1477 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1478 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1479 | { |
1480 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1481 | ||
1482 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1483 | if (!event_notifier_enabler) | |
1484 | return NULL; | |
1485 | event_notifier_enabler->base.format_type = format_type; | |
1486 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1487 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1488 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1489 | ||
1490 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1491 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1492 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1493 | |
1494 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1495 | event_notifier_param->event.name, | |
1496 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1497 | event_notifier_enabler->base.event_param.instrumentation = | |
1498 | event_notifier_param->event.instrumentation; | |
1499 | event_notifier_enabler->base.event_param.loglevel = | |
1500 | event_notifier_param->event.loglevel; | |
1501 | event_notifier_enabler->base.event_param.loglevel_type = | |
1502 | event_notifier_param->event.loglevel_type; | |
1503 | ||
1504 | event_notifier_enabler->base.enabled = 0; | |
1505 | event_notifier_enabler->group = event_notifier_group; | |
1506 | ||
1507 | cds_list_add(&event_notifier_enabler->node, | |
c70585a3 | 1508 | &event_notifier_group->unsync_enablers_head); |
d8d2416d FD |
1509 | |
1510 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1511 | ||
1512 | return event_notifier_enabler; | |
1513 | } | |
1514 | ||
d871c65b | 1515 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1516 | { |
d871c65b | 1517 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
c70585a3 | 1518 | lttng_event_enabler_unsync(event_enabler); |
e7bc0ef6 | 1519 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1520 | |
e58095ef | 1521 | return 0; |
457a6b58 | 1522 | } |
457a6b58 | 1523 | |
d871c65b | 1524 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1525 | { |
d871c65b | 1526 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
c70585a3 | 1527 | lttng_event_enabler_unsync(event_enabler); |
e7bc0ef6 | 1528 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1529 | |
e58095ef MD |
1530 | return 0; |
1531 | } | |
457a6b58 | 1532 | |
d871c65b | 1533 | static |
a56fd376 | 1534 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1535 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1536 | { |
ab89263e MD |
1537 | (*bytecode)->enabler = enabler; |
1538 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1539 | /* Take ownership of bytecode */ | |
1540 | *bytecode = NULL; | |
d871c65b FD |
1541 | } |
1542 | ||
a56fd376 | 1543 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1544 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1545 | { |
a56fd376 | 1546 | _lttng_enabler_attach_filter_bytecode( |
d871c65b | 1547 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
c70585a3 | 1548 | lttng_event_enabler_unsync(event_enabler); |
e7bc0ef6 | 1549 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1550 | return 0; |
0bfb5cbd JI |
1551 | } |
1552 | ||
d871c65b FD |
1553 | static |
1554 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1555 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1556 | { |
e9fe6aad MD |
1557 | (*excluder)->enabler = enabler; |
1558 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1559 | /* Take ownership of excluder */ | |
1560 | *excluder = NULL; | |
d871c65b FD |
1561 | } |
1562 | ||
1563 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1564 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1565 | { |
1566 | _lttng_enabler_attach_exclusion( | |
1567 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
c70585a3 | 1568 | lttng_event_enabler_unsync(event_enabler); |
e7bc0ef6 | 1569 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1570 | return 0; |
e58095ef | 1571 | } |
f488575f | 1572 | |
d8d2416d FD |
1573 | int lttng_event_notifier_enabler_enable( |
1574 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1575 | { | |
1576 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
c70585a3 | 1577 | lttng_event_notifier_enabler_unsync(event_notifier_enabler); |
d8d2416d FD |
1578 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
1579 | ||
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | int lttng_event_notifier_enabler_disable( | |
1584 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1585 | { | |
1586 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
c70585a3 | 1587 | lttng_event_notifier_enabler_unsync(event_notifier_enabler); |
d8d2416d FD |
1588 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | ||
a56fd376 | 1593 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1594 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1595 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1596 | { |
a56fd376 | 1597 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1598 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1599 | bytecode); | |
c70585a3 | 1600 | lttng_event_notifier_enabler_unsync(event_notifier_enabler); |
d8d2416d FD |
1601 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
1602 | return 0; | |
1603 | } | |
1604 | ||
d37ecb3f FD |
1605 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1606 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1607 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1608 | { |
49cde654 | 1609 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1610 | event_notifier_enabler); |
49cde654 | 1611 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1612 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1613 | /* Take ownership of bytecode */ |
1614 | *bytecode = NULL; | |
d37ecb3f | 1615 | event_notifier_enabler->num_captures++; |
c70585a3 | 1616 | lttng_event_notifier_enabler_unsync(event_notifier_enabler); |
d37ecb3f FD |
1617 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
1618 | return 0; | |
1619 | } | |
1620 | ||
d8d2416d FD |
1621 | int lttng_event_notifier_enabler_attach_exclusion( |
1622 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1623 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1624 | { |
1625 | _lttng_enabler_attach_exclusion( | |
1626 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1627 | excluder); | |
c70585a3 | 1628 | lttng_event_notifier_enabler_unsync(event_notifier_enabler); |
d8d2416d FD |
1629 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); |
1630 | return 0; | |
1631 | } | |
1632 | ||
fd17d7ce MD |
1633 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1634 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1635 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1636 | { |
457a6b58 | 1637 | /* |
e58095ef MD |
1638 | * We cannot attach a context after trace has been started for a |
1639 | * session because the metadata does not allow expressing this | |
1640 | * information outside of the original channel scope. | |
457a6b58 | 1641 | */ |
bdb12629 | 1642 | if (session->priv->been_active) |
e58095ef | 1643 | return -EPERM; |
457a6b58 | 1644 | |
e58095ef | 1645 | switch (context_param->ctx) { |
fd17d7ce | 1646 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1647 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1648 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1649 | { |
fd17d7ce | 1650 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1651 | |
1652 | perf_ctx_param = &context_param->u.perf_counter; | |
1653 | return lttng_add_perf_counter_to_ctx( | |
1654 | perf_ctx_param->type, | |
1655 | perf_ctx_param->config, | |
1656 | perf_ctx_param->name, | |
1657 | ctx); | |
1658 | } | |
fd17d7ce | 1659 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1660 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1661 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1662 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1663 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1664 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1665 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1666 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1667 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1668 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1669 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1670 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1671 | ctx); | |
fd17d7ce | 1672 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1673 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1674 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1675 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1676 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1677 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1678 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1679 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1680 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1681 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1682 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1683 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1684 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1685 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1686 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1687 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1688 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1689 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1690 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1691 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1692 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1693 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1694 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1695 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1696 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1697 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1698 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1699 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1700 | default: |
1701 | return -EINVAL; | |
457a6b58 | 1702 | } |
457a6b58 MD |
1703 | } |
1704 | ||
2208d8b5 MJ |
1705 | int lttng_event_enabler_attach_context( |
1706 | struct lttng_event_enabler *enabler __attribute__((unused)), | |
1707 | struct lttng_ust_abi_context *context_param __attribute__((unused))) | |
457a6b58 | 1708 | { |
e58095ef | 1709 | return -ENOSYS; |
457a6b58 MD |
1710 | } |
1711 | ||
d871c65b | 1712 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1713 | { |
d871c65b FD |
1714 | if (!event_enabler) { |
1715 | return; | |
0f63324a | 1716 | } |
d871c65b | 1717 | cds_list_del(&event_enabler->node); |
0f63324a | 1718 | |
d871c65b | 1719 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1720 | |
d871c65b FD |
1721 | lttng_destroy_context(event_enabler->ctx); |
1722 | free(event_enabler); | |
457a6b58 MD |
1723 | } |
1724 | ||
e58095ef | 1725 | /* |
d871c65b | 1726 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1727 | * session. |
1728 | */ | |
457a6b58 | 1729 | static |
f69fe5fb | 1730 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1731 | { |
d871c65b | 1732 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1733 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
c70585a3 MD |
1734 | struct cds_list_head iter_list; |
1735 | ||
1736 | /* | |
1737 | * lttng_event_enabler_ref_event_recorders can cause lazy probes | |
1738 | * to add items to the unsync_enablers_head list. Iterate on a | |
1739 | * local copy of that list until it is stable (empty). | |
1740 | */ | |
1741 | do { | |
1742 | CDS_INIT_LIST_HEAD(&iter_list); | |
1743 | cds_list_splice(&session->priv->unsync_enablers_head, &iter_list); | |
1744 | CDS_INIT_LIST_HEAD(&session->priv->unsync_enablers_head); | |
1745 | cds_list_for_each_entry(event_enabler, &iter_list, node) | |
1746 | lttng_event_enabler_ref_event_recorders(event_enabler); | |
1747 | cds_list_splice(&iter_list, &session->priv->sync_enablers_head); | |
1748 | } while (!cds_list_empty(&session->priv->unsync_enablers_head)); | |
457a6b58 | 1749 | |
e58095ef MD |
1750 | /* |
1751 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1752 | * and its channel and session transient states are enabled, we |
1753 | * enable the event, else we disable it. | |
e58095ef | 1754 | */ |
2e70391c | 1755 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1756 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1757 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1758 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1759 | int nr_filters = 0; | |
e58095ef MD |
1760 | |
1761 | /* Enable events */ | |
1762 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1763 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1764 | if (enabler_ref->ref->enabled) { |
1765 | enabled = 1; | |
1766 | break; | |
1767 | } | |
1768 | } | |
ac6b4ac6 MD |
1769 | /* |
1770 | * Enabled state is based on union of enablers, with | |
1771 | * intesection of session and channel transient enable | |
1772 | * states. | |
1773 | */ | |
e7bc0ef6 | 1774 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1775 | |
2e70391c | 1776 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1777 | /* |
1778 | * Sync tracepoint registration with event enabled | |
1779 | * state. | |
1780 | */ | |
1781 | if (enabled) { | |
2e70391c | 1782 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1783 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1784 | } else { |
2e70391c | 1785 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1786 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1787 | } |
457a6b58 | 1788 | |
1f49fc05 | 1789 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1790 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1791 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1792 | if (enabler_ref->ref->enabled |
1793 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1794 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1795 | break; |
1796 | } | |
1797 | } | |
a2e4d05e MD |
1798 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1799 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1800 | |
e58095ef MD |
1801 | /* Enable filters */ |
1802 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1803 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1804 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1805 | nr_filters++; |
457a6b58 | 1806 | } |
a2e4d05e MD |
1807 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1808 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1809 | } |
d10a2205 | 1810 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1811 | } |
1812 | ||
d8d2416d FD |
1813 | static |
1814 | void lttng_create_event_notifier_if_missing( | |
1815 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1816 | { | |
1817 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
4e48b5d2 | 1818 | struct lttng_ust_registered_probe *reg_probe; |
d8d2416d FD |
1819 | struct cds_list_head *probe_list; |
1820 | int i; | |
1821 | ||
1822 | probe_list = lttng_get_probe_list_head(); | |
1823 | ||
4e48b5d2 MD |
1824 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1825 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1826 | ||
d8d2416d FD |
1827 | for (i = 0; i < probe_desc->nr_events; i++) { |
1828 | int ret; | |
1829 | bool found = false; | |
4e48b5d2 | 1830 | const struct lttng_ust_event_desc *desc; |
115db533 | 1831 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1832 | struct cds_hlist_head *head; |
1833 | struct cds_hlist_node *node; | |
1834 | ||
1835 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1836 | |
d8d2416d FD |
1837 | if (!lttng_desc_match_enabler(desc, |
1838 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1839 | continue; | |
1840 | ||
1841 | /* | |
1842 | * Given the current event_notifier group, get the bucket that | |
1843 | * the target event_notifier would be if it was already | |
1844 | * created. | |
1845 | */ | |
1846 | head = borrow_hash_table_bucket( | |
1847 | event_notifier_group->event_notifiers_ht.table, | |
1848 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1849 | ||
115db533 | 1850 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1851 | /* |
1852 | * Check if event_notifier already exists by checking | |
1853 | * if the event_notifier and enabler share the same | |
1854 | * description and id. | |
1855 | */ | |
115db533 MD |
1856 | if (event_notifier_priv->parent.desc == desc && |
1857 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1858 | found = true; |
1859 | break; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | if (found) | |
1864 | continue; | |
1865 | ||
1866 | /* | |
1867 | * We need to create a event_notifier for this event probe. | |
1868 | */ | |
1869 | ret = lttng_event_notifier_create(desc, | |
1870 | event_notifier_enabler->user_token, | |
6566528b | 1871 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1872 | event_notifier_group); |
1873 | if (ret) { | |
5b4c6da4 MD |
1874 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1875 | probe_desc->provider_name, | |
1876 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1877 | } |
1878 | } | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | /* | |
1883 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1884 | */ | |
1885 | static | |
1886 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1887 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1888 | { | |
1889 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1890 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1891 | |
1892 | /* | |
1893 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1894 | * might still be attaching filter or exclusion to the | |
1895 | * event_notifier_enabler. | |
1896 | */ | |
1897 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1898 | goto end; | |
1899 | ||
1900 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1901 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1902 | ||
1903 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1904 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1905 | struct lttng_enabler_ref *enabler_ref; |
1906 | ||
115db533 | 1907 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1908 | continue; |
1909 | ||
115db533 | 1910 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1911 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1912 | if (!enabler_ref) { | |
1913 | /* | |
1914 | * If no backward ref, create it. | |
1915 | * Add backward ref from event_notifier to enabler. | |
1916 | */ | |
1917 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1918 | if (!enabler_ref) | |
1919 | return -ENOMEM; | |
1920 | ||
1921 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1922 | event_notifier_enabler); | |
1923 | cds_list_add(&enabler_ref->node, | |
115db533 | 1924 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1925 | } |
1926 | ||
1927 | /* | |
1928 | * Link filter bytecodes if not linked yet. | |
1929 | */ | |
115db533 | 1930 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1931 | &event_notifier_group->ctx, |
a2e4d05e | 1932 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1933 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1934 | |
1935 | /* | |
1936 | * Link capture bytecodes if not linked yet. | |
1937 | */ | |
115db533 | 1938 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1939 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1940 | &event_notifier_enabler->capture_bytecode_head); |
1941 | ||
115db533 | 1942 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1943 | } |
1944 | end: | |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | static | |
1949 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1950 | { | |
1951 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1952 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
c70585a3 | 1953 | struct cds_list_head iter_list; |
d8d2416d | 1954 | |
c70585a3 MD |
1955 | /* |
1956 | * lttng_event_notifier_enabler_ref_event_notifiers can cause | |
1957 | * lazy probes to add items to the unsync_enablers_head list. | |
1958 | * Iterate on a local copy of that list until it is stable | |
1959 | * (empty). | |
1960 | */ | |
1961 | do { | |
1962 | CDS_INIT_LIST_HEAD(&iter_list); | |
1963 | cds_list_splice(&event_notifier_group->unsync_enablers_head, &iter_list); | |
1964 | CDS_INIT_LIST_HEAD(&event_notifier_group->unsync_enablers_head); | |
1965 | cds_list_for_each_entry(event_notifier_enabler, &iter_list, node) | |
1966 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1967 | cds_list_splice(&iter_list, &event_notifier_group->sync_enablers_head); | |
1968 | } while (!cds_list_empty(&event_notifier_group->unsync_enablers_head)); | |
d8d2416d FD |
1969 | |
1970 | /* | |
1971 | * For each event_notifier, if at least one of its enablers is enabled, | |
1972 | * we enable the event_notifier, else we disable it. | |
1973 | */ | |
115db533 | 1974 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1975 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1976 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1977 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1978 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1979 | |
1980 | /* Enable event_notifiers */ | |
1981 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1982 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1983 | if (enabler_ref->ref->enabled) { |
1984 | enabled = 1; | |
1985 | break; | |
1986 | } | |
1987 | } | |
1988 | ||
115db533 | 1989 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1990 | /* |
1991 | * Sync tracepoint registration with event_notifier enabled | |
1992 | * state. | |
1993 | */ | |
1994 | if (enabled) { | |
115db533 | 1995 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1996 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1997 | } else { |
115db533 | 1998 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1999 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
2000 | } |
2001 | ||
2002 | /* Check if has enablers without bytecode enabled */ | |
2003 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 2004 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
2005 | if (enabler_ref->ref->enabled |
2006 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 2007 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
2008 | break; |
2009 | } | |
2010 | } | |
a2e4d05e MD |
2011 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
2012 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
2013 | |
2014 | /* Enable filters */ | |
2015 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 2016 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 2017 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 2018 | nr_filters++; |
d8d2416d | 2019 | } |
a2e4d05e MD |
2020 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
2021 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
2022 | |
2023 | /* Enable captures. */ | |
2024 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 2025 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 2026 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 2027 | nr_captures++; |
d37ecb3f | 2028 | } |
a2e4d05e MD |
2029 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
2030 | !!nr_captures); | |
d8d2416d | 2031 | } |
d10a2205 | 2032 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
2033 | } |
2034 | ||
e58095ef MD |
2035 | /* |
2036 | * Apply enablers to session events, adding events to session if need | |
2037 | * be. It is required after each modification applied to an active | |
2038 | * session, and right before session "start". | |
2039 | * "lazy" sync means we only sync if required. | |
2040 | */ | |
2041 | static | |
f69fe5fb | 2042 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 2043 | { |
e58095ef MD |
2044 | /* We can skip if session is not active */ |
2045 | if (!session->active) | |
2046 | return; | |
d871c65b | 2047 | lttng_session_sync_event_enablers(session); |
457a6b58 | 2048 | } |
53569322 MD |
2049 | |
2050 | /* | |
2051 | * Update all sessions with the given app context. | |
2052 | * Called with ust lock held. | |
2053 | * This is invoked when an application context gets loaded/unloaded. It | |
2054 | * ensures the context callbacks are in sync with the application | |
2055 | * context (either app context callbacks, or dummy callbacks). | |
2056 | */ | |
2057 | void lttng_ust_context_set_session_provider(const char *name, | |
b2e37d27 MD |
2058 | size_t (*get_size)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
2059 | size_t offset), | |
2060 | void (*record)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, | |
2061 | struct lttng_ust_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2062 | struct lttng_ust_channel_buffer *chan), |
b2e37d27 | 2063 | void (*get_value)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
577f6dfc | 2064 | struct lttng_ust_ctx_value *value)) |
53569322 | 2065 | { |
bdb12629 | 2066 | struct lttng_ust_session_private *session_priv; |
53569322 | 2067 | |
bdb12629 | 2068 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2069 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2070 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2071 | int ret; |
2072 | ||
bdb12629 | 2073 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
577f6dfc | 2074 | name, get_size, record, get_value); |
53569322 MD |
2075 | if (ret) |
2076 | abort(); | |
bdb12629 | 2077 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2078 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
577f6dfc | 2079 | name, get_size, record, get_value); |
53569322 MD |
2080 | if (ret) |
2081 | abort(); | |
2082 | } | |
2e70391c | 2083 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2084 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
577f6dfc | 2085 | name, get_size, record, get_value); |
53569322 MD |
2086 | if (ret) |
2087 | abort(); | |
2088 | } | |
2089 | } | |
2090 | } | |
d8d2416d FD |
2091 | |
2092 | /* | |
2093 | * Update all event_notifier groups with the given app context. | |
2094 | * Called with ust lock held. | |
2095 | * This is invoked when an application context gets loaded/unloaded. It | |
2096 | * ensures the context callbacks are in sync with the application | |
2097 | * context (either app context callbacks, or dummy callbacks). | |
2098 | */ | |
2099 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
b2e37d27 MD |
2100 | size_t (*get_size)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
2101 | size_t offset), | |
2102 | void (*record)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, | |
2103 | struct lttng_ust_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2104 | struct lttng_ust_channel_buffer *chan), |
b2e37d27 | 2105 | void (*get_value)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
577f6dfc | 2106 | struct lttng_ust_ctx_value *value)) |
d8d2416d FD |
2107 | { |
2108 | struct lttng_event_notifier_group *event_notifier_group; | |
2109 | ||
2110 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2111 | int ret; | |
2112 | ||
2113 | ret = lttng_ust_context_set_provider_rcu( | |
2114 | &event_notifier_group->ctx, | |
577f6dfc | 2115 | name, get_size, record, get_value); |
d8d2416d FD |
2116 | if (ret) |
2117 | abort(); | |
2118 | } | |
2119 | } | |
9daacd1a MD |
2120 | |
2121 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2122 | unsigned char *uuid) | |
2123 | { | |
2124 | if (!session) | |
2125 | return 0; | |
2126 | /* Compare UUID with session. */ | |
2127 | if (session->priv->uuid_set) { | |
2128 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2129 | return -1; | |
2130 | } | |
2131 | } else { | |
2132 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2133 | session->priv->uuid_set = true; | |
2134 | } | |
2135 | return 0; | |
2136 | ||
2137 | } |