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 MD |
34 | |
35 | #include <usterr-signal-safe.h> | |
864a1eda | 36 | #include <ust-helper.h> |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
32ce8569 | 38 | #include <ust-comm.h> |
d8d2416d | 39 | #include <ust-fd.h> |
ae4b659d MJ |
40 | #include <ust-dynamic-type.h> |
41 | #include <ust-context-provider.h> | |
1f18504e | 42 | #include "error.h" |
08114193 | 43 | #include "compat.h" |
eda498b8 | 44 | #include "lttng-ust-uuid.h" |
44c72f10 | 45 | |
457a6b58 | 46 | #include "tracepoint-internal.h" |
196ec2df | 47 | #include "string-utils.h" |
4d451c15 | 48 | #include "lttng-bytecode.h" |
7dd08bec MD |
49 | #include "lttng-tracer.h" |
50 | #include "lttng-tracer-core.h" | |
cf73e0fe | 51 | #include "lttng-ust-statedump.h" |
51f804ec | 52 | #include "context-internal.h" |
d871c65b | 53 | #include "ust-events-internal.h" |
b728d87e | 54 | #include "wait.h" |
8d8a24c8 | 55 | #include "../libringbuffer/shm.h" |
ebabbf58 | 56 | #include "../libcounter/counter.h" |
596c4223 | 57 | #include "jhash.h" |
d8d2416d | 58 | #include <lttng/ust-abi.h> |
8165c8da MD |
59 | |
60 | /* | |
3327ac33 MD |
61 | * All operations within this file are called by the communication |
62 | * thread, under ust_lock protection. | |
8165c8da | 63 | */ |
8165c8da | 64 | |
b5234c06 | 65 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 66 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 67 | |
7753d283 | 68 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
69 | { |
70 | return &sessions; | |
71 | } | |
72 | ||
ba99fbe2 | 73 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 74 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 75 | |
e58095ef | 76 | static |
f69fe5fb | 77 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 78 | static |
f69fe5fb | 79 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 80 | static |
d8d2416d FD |
81 | void lttng_event_notifier_group_sync_enablers( |
82 | struct lttng_event_notifier_group *event_notifier_group); | |
83 | static | |
e58095ef MD |
84 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
85 | ||
6715d7d1 MD |
86 | /* |
87 | * Called with ust lock held. | |
88 | */ | |
89 | int lttng_session_active(void) | |
90 | { | |
bdb12629 | 91 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
92 | |
93 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 94 | if (iter->pub->active) |
6715d7d1 MD |
95 | return 1; |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
e58095ef MD |
100 | static |
101 | int lttng_loglevel_match(int loglevel, | |
102 | unsigned int has_loglevel, | |
fd17d7ce | 103 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
104 | int req_loglevel) |
105 | { | |
e58095ef MD |
106 | if (!has_loglevel) |
107 | loglevel = TRACE_DEFAULT; | |
457a6b58 | 108 | switch (req_type) { |
fd17d7ce | 109 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 110 | if (loglevel <= req_loglevel |
67ada458 | 111 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
112 | return 1; |
113 | else | |
114 | return 0; | |
fd17d7ce | 115 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 116 | if (loglevel == req_loglevel |
67ada458 | 117 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
118 | return 1; |
119 | else | |
120 | return 0; | |
fd17d7ce | 121 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 122 | default: |
67ada458 | 123 | if (loglevel <= TRACE_DEBUG) |
aacb3774 MD |
124 | return 1; |
125 | else | |
126 | return 0; | |
457a6b58 MD |
127 | } |
128 | } | |
129 | ||
f69fe5fb | 130 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 131 | { |
f69fe5fb | 132 | struct lttng_ust_session *session; |
bdb12629 | 133 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 134 | int i; |
8020ceb5 | 135 | |
f69fe5fb | 136 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
137 | if (!session) |
138 | return NULL; | |
f69fe5fb | 139 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
140 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
141 | if (!session_priv) { | |
53569322 MD |
142 | free(session); |
143 | return NULL; | |
144 | } | |
bdb12629 MD |
145 | session->priv = session_priv; |
146 | session_priv->pub = session; | |
147 | if (lttng_context_init_all(&session->priv->ctx)) { | |
148 | free(session_priv); | |
149 | free(session); | |
150 | return NULL; | |
151 | } | |
152 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
153 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
154 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
155 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 156 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 157 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 158 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
159 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
160 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
161 | return session; |
162 | } | |
163 | ||
ebabbf58 MD |
164 | struct lttng_counter *lttng_ust_counter_create( |
165 | const char *counter_transport_name, | |
166 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
167 | { | |
168 | struct lttng_counter_transport *counter_transport = NULL; | |
169 | struct lttng_counter *counter = NULL; | |
170 | ||
171 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
172 | if (!counter_transport) | |
173 | goto notransport; | |
174 | counter = zmalloc(sizeof(struct lttng_counter)); | |
175 | if (!counter) | |
176 | goto nomem; | |
177 | ||
178 | counter->ops = &counter_transport->ops; | |
179 | counter->transport = counter_transport; | |
180 | ||
181 | counter->counter = counter->ops->counter_create( | |
182 | number_dimensions, dimensions, 0, | |
183 | -1, 0, NULL, false); | |
184 | if (!counter->counter) { | |
185 | goto create_error; | |
186 | } | |
187 | ||
188 | return counter; | |
189 | ||
190 | create_error: | |
191 | free(counter); | |
192 | nomem: | |
193 | notransport: | |
194 | return NULL; | |
195 | } | |
196 | ||
197 | static | |
198 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
199 | { | |
200 | counter->ops->counter_destroy(counter->counter); | |
201 | free(counter); | |
202 | } | |
203 | ||
d8d2416d FD |
204 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
205 | { | |
206 | struct lttng_event_notifier_group *event_notifier_group; | |
207 | int i; | |
208 | ||
209 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
210 | if (!event_notifier_group) | |
211 | return NULL; | |
212 | ||
51f804ec FD |
213 | /* Add all contexts. */ |
214 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
215 | free(event_notifier_group); | |
216 | return NULL; | |
217 | } | |
218 | ||
d8d2416d FD |
219 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
220 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
221 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
222 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
223 | ||
224 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
225 | ||
226 | return event_notifier_group; | |
227 | } | |
228 | ||
74d81a6c MD |
229 | /* |
230 | * Only used internally at session destruction. | |
231 | */ | |
232 | static | |
233 | void _lttng_channel_unmap(struct lttng_channel *lttng_chan) | |
234 | { | |
5198080d | 235 | struct lttng_ust_lib_ring_buffer_channel *chan; |
74d81a6c MD |
236 | struct lttng_ust_shm_handle *handle; |
237 | ||
238 | cds_list_del(<tng_chan->node); | |
239 | lttng_destroy_context(lttng_chan->ctx); | |
240 | chan = lttng_chan->chan; | |
241 | handle = lttng_chan->handle; | |
242 | /* | |
243 | * note: lttng_chan is private data contained within handle. It | |
244 | * will be freed along with the handle. | |
245 | */ | |
246 | channel_destroy(chan, handle, 0); | |
247 | } | |
248 | ||
ac6b4ac6 | 249 | static |
ba99fbe2 | 250 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
251 | { |
252 | int ret; | |
dc11f93f | 253 | const struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 254 | |
ba99fbe2 MD |
255 | assert(event->priv->registered == 0); |
256 | desc = event->priv->desc; | |
d10a2205 | 257 | ret = lttng_ust_tp_probe_register_queue_release(desc->name, |
ac6b4ac6 | 258 | desc->probe_callback, |
ba99fbe2 | 259 | event, desc->signature); |
ac6b4ac6 MD |
260 | WARN_ON_ONCE(ret); |
261 | if (!ret) | |
ba99fbe2 | 262 | event->priv->registered = 1; |
ac6b4ac6 MD |
263 | } |
264 | ||
d8d2416d | 265 | static |
ba99fbe2 | 266 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
267 | { |
268 | int ret; | |
dc11f93f | 269 | const struct lttng_ust_event_desc *desc; |
d8d2416d | 270 | |
ba99fbe2 MD |
271 | assert(event->priv->registered == 1); |
272 | desc = event->priv->desc; | |
d10a2205 | 273 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->name, |
ac6b4ac6 | 274 | desc->probe_callback, |
ba99fbe2 | 275 | event); |
ac6b4ac6 MD |
276 | WARN_ON_ONCE(ret); |
277 | if (!ret) | |
ba99fbe2 | 278 | event->priv->registered = 0; |
ac6b4ac6 MD |
279 | } |
280 | ||
d8d2416d | 281 | static |
ba99fbe2 | 282 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 283 | { |
ba99fbe2 MD |
284 | if (event->priv->registered) |
285 | unregister_event(event); | |
d8d2416d FD |
286 | } |
287 | ||
f69fe5fb | 288 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 289 | { |
7dd08bec | 290 | struct lttng_channel *chan, *tmpchan; |
2e70391c | 291 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 292 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 293 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 294 | |
b5234c06 | 295 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 296 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 297 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 298 | } |
b653ddc1 | 299 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 300 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 301 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 302 | &session->priv->enablers_head, node) |
d871c65b | 303 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 304 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 305 | &session->priv->events_head, node) |
ba99fbe2 | 306 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 307 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 308 | &session->priv->enums_head, node) |
c785c634 | 309 | _lttng_enum_destroy(_enum); |
bdb12629 | 310 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
74d81a6c | 311 | _lttng_channel_unmap(chan); |
bdb12629 MD |
312 | cds_list_del(&session->priv->node); |
313 | lttng_destroy_context(session->priv->ctx); | |
314 | free(session->priv); | |
b5234c06 | 315 | free(session); |
8020ceb5 MD |
316 | } |
317 | ||
d8d2416d FD |
318 | void lttng_event_notifier_group_destroy( |
319 | struct lttng_event_notifier_group *event_notifier_group) | |
320 | { | |
321 | int close_ret; | |
322 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 323 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
324 | |
325 | if (!event_notifier_group) { | |
326 | return; | |
327 | } | |
328 | ||
ba99fbe2 | 329 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 330 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 331 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 332 | |
b653ddc1 | 333 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
334 | |
335 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
336 | &event_notifier_group->enablers_head, node) | |
337 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
338 | ||
ba99fbe2 | 339 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 340 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 341 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 342 | |
ebabbf58 MD |
343 | if (event_notifier_group->error_counter) |
344 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
345 | ||
346 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
347 | |
348 | lttng_ust_lock_fd_tracker(); | |
349 | close_ret = close(event_notifier_group->notification_fd); | |
350 | if (!close_ret) { | |
351 | lttng_ust_delete_fd_from_tracker( | |
352 | event_notifier_group->notification_fd); | |
353 | } else { | |
354 | PERROR("close"); | |
355 | abort(); | |
356 | } | |
357 | lttng_ust_unlock_fd_tracker(); | |
358 | ||
359 | cds_list_del(&event_notifier_group->node); | |
360 | ||
361 | free(event_notifier_group); | |
362 | } | |
363 | ||
d871c65b FD |
364 | static |
365 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
366 | { | |
ab249ecf | 367 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
368 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
369 | ||
370 | if (!enabler) { | |
371 | return; | |
372 | } | |
373 | ||
374 | /* Destroy filter bytecode */ | |
375 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
376 | &enabler->filter_bytecode_head, node) { | |
377 | free(filter_node); | |
378 | } | |
379 | ||
380 | /* Destroy excluders */ | |
381 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
382 | &enabler->excluder_head, node) { | |
383 | free(excluder_node); | |
384 | } | |
385 | } | |
386 | ||
d8d2416d FD |
387 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
388 | { | |
389 | if (!event_notifier_enabler) { | |
390 | return; | |
391 | } | |
392 | ||
393 | cds_list_del(&event_notifier_enabler->node); | |
394 | ||
395 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
396 | ||
397 | free(event_notifier_enabler); | |
398 | } | |
399 | ||
53569322 | 400 | static |
891d6b55 | 401 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 402 | struct lttng_ust_session *session) |
53569322 MD |
403 | { |
404 | const char *enum_name = desc->name; | |
405 | struct lttng_enum *_enum; | |
406 | struct cds_hlist_head *head; | |
53569322 MD |
407 | int ret = 0; |
408 | size_t name_len = strlen(enum_name); | |
409 | uint32_t hash; | |
410 | int notify_socket; | |
411 | ||
b33b46f7 | 412 | /* Check if this enum is already registered for this session. */ |
53569322 | 413 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 414 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
415 | |
416 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
417 | if (_enum) { | |
418 | ret = -EEXIST; | |
419 | goto exist; | |
53569322 MD |
420 | } |
421 | ||
bdb12629 | 422 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
423 | if (notify_socket < 0) { |
424 | ret = notify_socket; | |
425 | goto socket_error; | |
426 | } | |
427 | ||
428 | _enum = zmalloc(sizeof(*_enum)); | |
429 | if (!_enum) { | |
430 | ret = -ENOMEM; | |
431 | goto cache_error; | |
432 | } | |
433 | _enum->session = session; | |
434 | _enum->desc = desc; | |
435 | ||
436 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 437 | session->priv->objd, |
53569322 MD |
438 | enum_name, |
439 | desc->nr_entries, | |
440 | desc->entries, | |
441 | &_enum->id); | |
442 | if (ret < 0) { | |
443 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
444 | goto sessiond_register_error; | |
445 | } | |
bdb12629 | 446 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
447 | cds_hlist_add_head(&_enum->hlist, head); |
448 | return 0; | |
449 | ||
450 | sessiond_register_error: | |
451 | free(_enum); | |
452 | cache_error: | |
453 | socket_error: | |
454 | exist: | |
455 | return ret; | |
456 | } | |
457 | ||
458 | static | |
459 | int lttng_create_enum_check(const struct lttng_type *type, | |
f69fe5fb | 460 | struct lttng_ust_session *session) |
53569322 MD |
461 | { |
462 | switch (type->atype) { | |
218deb69 MD |
463 | case atype_enum_nestable: |
464 | { | |
891d6b55 | 465 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
466 | int ret; |
467 | ||
468 | enum_desc = type->u.enum_nestable.desc; | |
53569322 MD |
469 | ret = lttng_enum_create(enum_desc, session); |
470 | if (ret && ret != -EEXIST) { | |
471 | DBG("Unable to create enum error: (%d)", ret); | |
472 | return ret; | |
473 | } | |
474 | break; | |
475 | } | |
476 | case atype_dynamic: | |
477 | { | |
25cff019 | 478 | const struct lttng_ust_event_field *tag_field_generic; |
891d6b55 | 479 | const struct lttng_ust_enum_desc *enum_desc; |
53569322 MD |
480 | int ret; |
481 | ||
482 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
218deb69 | 483 | enum_desc = tag_field_generic->type.u.enum_nestable.desc; |
53569322 MD |
484 | ret = lttng_enum_create(enum_desc, session); |
485 | if (ret && ret != -EEXIST) { | |
486 | DBG("Unable to create enum error: (%d)", ret); | |
487 | return ret; | |
488 | } | |
489 | break; | |
490 | } | |
491 | default: | |
492 | /* TODO: nested types when they become supported. */ | |
493 | break; | |
494 | } | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static | |
499 | int lttng_create_all_event_enums(size_t nr_fields, | |
25cff019 | 500 | const struct lttng_ust_event_field **event_fields, |
f69fe5fb | 501 | struct lttng_ust_session *session) |
53569322 MD |
502 | { |
503 | size_t i; | |
504 | int ret; | |
505 | ||
506 | /* For each field, ensure enum is part of the session. */ | |
507 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 508 | const struct lttng_type *type = &event_fields[i]->type; |
53569322 MD |
509 | |
510 | ret = lttng_create_enum_check(type, session); | |
511 | if (ret) | |
512 | return ret; | |
513 | } | |
514 | return 0; | |
515 | } | |
516 | ||
517 | static | |
518 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
daacdbfc | 519 | struct lttng_ust_ctx_field **ctx_fields, |
f69fe5fb | 520 | struct lttng_ust_session *session) |
53569322 MD |
521 | { |
522 | size_t i; | |
523 | int ret; | |
524 | ||
525 | /* For each field, ensure enum is part of the session. */ | |
526 | for (i = 0; i < nr_fields; i++) { | |
daacdbfc | 527 | const struct lttng_type *type = &ctx_fields[i]->event_field->type; |
53569322 MD |
528 | |
529 | ret = lttng_create_enum_check(type, session); | |
530 | if (ret) | |
531 | return ret; | |
532 | } | |
533 | return 0; | |
534 | } | |
535 | ||
710b8ee3 MD |
536 | /* |
537 | * Ensure that a state-dump will be performed for this session at the end | |
538 | * of the current handle_message(). | |
539 | */ | |
f69fe5fb | 540 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 541 | { |
bdb12629 MD |
542 | session->priv->statedump_pending = 1; |
543 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
544 | return 0; |
545 | } | |
53569322 | 546 | |
f69fe5fb | 547 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
548 | { |
549 | int ret = 0; | |
7dd08bec | 550 | struct lttng_channel *chan; |
32ce8569 | 551 | int notify_socket; |
8020ceb5 | 552 | |
8020ceb5 MD |
553 | if (session->active) { |
554 | ret = -EBUSY; | |
555 | goto end; | |
556 | } | |
557 | ||
bdb12629 | 558 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
559 | if (notify_socket < 0) |
560 | return notify_socket; | |
561 | ||
ac6b4ac6 | 562 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 563 | session->priv->tstate = 1; |
e58095ef | 564 | |
3ff7660f | 565 | /* We need to sync enablers with session before activation. */ |
d871c65b | 566 | lttng_session_sync_event_enablers(session); |
3ff7660f | 567 | |
8020ceb5 MD |
568 | /* |
569 | * Snapshot the number of events per channel to know the type of header | |
570 | * we need to use. | |
571 | */ | |
bdb12629 | 572 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
daacdbfc MD |
573 | const struct lttng_ust_ctx *ctx; |
574 | struct lttng_ust_ctx_field **fields = NULL; | |
32ce8569 | 575 | size_t nr_fields = 0; |
6ca18e66 | 576 | uint32_t chan_id; |
32ce8569 MD |
577 | |
578 | /* don't change it if session stop/restart */ | |
8020ceb5 | 579 | if (chan->header_type) |
32ce8569 MD |
580 | continue; |
581 | ctx = chan->ctx; | |
582 | if (ctx) { | |
583 | nr_fields = ctx->nr_fields; | |
83e43212 | 584 | fields = ctx->fields; |
53569322 MD |
585 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
586 | session); | |
587 | if (ret < 0) { | |
588 | DBG("Error (%d) adding enum to session", ret); | |
589 | return ret; | |
590 | } | |
32ce8569 MD |
591 | } |
592 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 593 | session, |
bdb12629 | 594 | session->priv->objd, |
32ce8569 MD |
595 | chan->objd, |
596 | nr_fields, | |
597 | fields, | |
6ca18e66 | 598 | &chan_id, |
32ce8569 | 599 | &chan->header_type); |
b869b5ae MD |
600 | if (ret) { |
601 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 602 | return ret; |
b869b5ae | 603 | } |
6ca18e66 MD |
604 | if (chan_id != chan->id) { |
605 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
606 | chan_id, chan->id); | |
607 | return -EINVAL; | |
608 | } | |
8020ceb5 MD |
609 | } |
610 | ||
ac6b4ac6 | 611 | /* Set atomically the state to "active" */ |
b5234c06 | 612 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 613 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 614 | |
710b8ee3 MD |
615 | ret = lttng_session_statedump(session); |
616 | if (ret) | |
617 | return ret; | |
8020ceb5 | 618 | end: |
8020ceb5 MD |
619 | return ret; |
620 | } | |
621 | ||
f69fe5fb | 622 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
623 | { |
624 | int ret = 0; | |
625 | ||
8020ceb5 MD |
626 | if (!session->active) { |
627 | ret = -EBUSY; | |
628 | goto end; | |
629 | } | |
ac6b4ac6 | 630 | /* Set atomically the state to "inactive" */ |
b5234c06 | 631 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
632 | |
633 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 634 | session->priv->tstate = 0; |
d871c65b | 635 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 636 | end: |
8020ceb5 MD |
637 | return ret; |
638 | } | |
639 | ||
7dd08bec | 640 | int lttng_channel_enable(struct lttng_channel *channel) |
976fe9ea | 641 | { |
ac6b4ac6 | 642 | int ret = 0; |
976fe9ea | 643 | |
ac6b4ac6 MD |
644 | if (channel->enabled) { |
645 | ret = -EBUSY; | |
646 | goto end; | |
647 | } | |
648 | /* Set transient enabler state to "enabled" */ | |
649 | channel->tstate = 1; | |
d871c65b | 650 | lttng_session_sync_event_enablers(channel->session); |
ac6b4ac6 MD |
651 | /* Set atomically the state to "enabled" */ |
652 | CMM_ACCESS_ONCE(channel->enabled) = 1; | |
653 | end: | |
654 | return ret; | |
976fe9ea MD |
655 | } |
656 | ||
7dd08bec | 657 | int lttng_channel_disable(struct lttng_channel *channel) |
976fe9ea | 658 | { |
ac6b4ac6 | 659 | int ret = 0; |
976fe9ea | 660 | |
ac6b4ac6 MD |
661 | if (!channel->enabled) { |
662 | ret = -EBUSY; | |
663 | goto end; | |
664 | } | |
665 | /* Set atomically the state to "disabled" */ | |
666 | CMM_ACCESS_ONCE(channel->enabled) = 0; | |
667 | /* Set transient enabler state to "enabled" */ | |
668 | channel->tstate = 0; | |
d871c65b | 669 | lttng_session_sync_event_enablers(channel->session); |
ac6b4ac6 MD |
670 | end: |
671 | return ret; | |
976fe9ea MD |
672 | } |
673 | ||
fb470188 FD |
674 | static inline |
675 | struct cds_hlist_head *borrow_hash_table_bucket( | |
676 | struct cds_hlist_head *hash_table, | |
677 | unsigned int hash_table_size, | |
dc11f93f | 678 | const struct lttng_ust_event_desc *desc) |
fb470188 FD |
679 | { |
680 | const char *event_name; | |
681 | size_t name_len; | |
682 | uint32_t hash; | |
683 | ||
684 | event_name = desc->name; | |
685 | name_len = strlen(event_name); | |
686 | ||
687 | hash = jhash(event_name, name_len, 0); | |
688 | return &hash_table[hash & (hash_table_size - 1)]; | |
689 | } | |
690 | ||
8020ceb5 MD |
691 | /* |
692 | * Supports event creation while tracing session is active. | |
693 | */ | |
e58095ef | 694 | static |
dc11f93f | 695 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e58095ef | 696 | struct lttng_channel *chan) |
8020ceb5 | 697 | { |
2e70391c MD |
698 | struct lttng_ust_event_recorder *event_recorder; |
699 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
f69fe5fb | 700 | struct lttng_ust_session *session = chan->session; |
d56fa719 | 701 | struct cds_hlist_head *head; |
576599a0 | 702 | int ret = 0; |
32ce8569 MD |
703 | int notify_socket, loglevel; |
704 | const char *uri; | |
8020ceb5 | 705 | |
bdb12629 | 706 | head = borrow_hash_table_bucket(chan->session->priv->events_ht.table, |
fb470188 | 707 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 708 | |
bdb12629 | 709 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
710 | if (notify_socket < 0) { |
711 | ret = notify_socket; | |
712 | goto socket_error; | |
713 | } | |
714 | ||
53569322 MD |
715 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
716 | session); | |
c785c634 MD |
717 | if (ret < 0) { |
718 | DBG("Error (%d) adding enum to session", ret); | |
719 | goto create_enum_error; | |
720 | } | |
721 | ||
457a6b58 MD |
722 | /* |
723 | * Check if loglevel match. Refuse to connect event if not. | |
724 | */ | |
2e70391c MD |
725 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
726 | if (!event_recorder) { | |
576599a0 | 727 | ret = -ENOMEM; |
8020ceb5 | 728 | goto cache_error; |
576599a0 | 729 | } |
2e70391c | 730 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 731 | |
7ee76145 | 732 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 733 | if (!event_recorder->parent) { |
80333dfa MD |
734 | ret = -ENOMEM; |
735 | goto parent_error; | |
736 | } | |
7ee76145 | 737 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 738 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 739 | event_recorder->parent->child = event_recorder; |
80333dfa | 740 | |
2e70391c MD |
741 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
742 | if (!event_recorder_priv) { | |
68bb7559 MD |
743 | ret = -ENOMEM; |
744 | goto priv_error; | |
745 | } | |
2e70391c MD |
746 | event_recorder->priv = event_recorder_priv; |
747 | event_recorder_priv->pub = event_recorder; | |
748 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
749 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 750 | |
2e70391c | 751 | event_recorder->chan = chan; |
e58095ef | 752 | |
ac6b4ac6 | 753 | /* Event will be enabled by enabler sync. */ |
2e70391c MD |
754 | event_recorder->parent->enabled = 0; |
755 | event_recorder->parent->priv->registered = 0; | |
756 | CDS_INIT_LIST_HEAD(&event_recorder->parent->filter_bytecode_runtime_head); | |
757 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); | |
758 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
759 | |
760 | if (desc->loglevel) | |
2e70391c | 761 | loglevel = *(*event_recorder->parent->priv->desc->loglevel); |
32ce8569 MD |
762 | else |
763 | loglevel = TRACE_DEFAULT; | |
dc11f93f MD |
764 | if (desc->model_emf_uri) |
765 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
766 | else |
767 | uri = NULL; | |
768 | ||
13b21cd6 MD |
769 | /* Fetch event ID from sessiond */ |
770 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 771 | session, |
bdb12629 | 772 | session->priv->objd, |
13b21cd6 | 773 | chan->objd, |
fb470188 | 774 | desc->name, |
13b21cd6 MD |
775 | loglevel, |
776 | desc->signature, | |
777 | desc->nr_fields, | |
778 | desc->fields, | |
779 | uri, | |
2e70391c | 780 | &event_recorder->id); |
13b21cd6 MD |
781 | if (ret < 0) { |
782 | DBG("Error (%d) registering event to sessiond", ret); | |
783 | goto sessiond_register_error; | |
32ce8569 | 784 | } |
2b213b16 | 785 | |
ba99fbe2 MD |
786 | cds_list_add(&event_recorder_priv->node, &chan->session->priv->events_head); |
787 | cds_hlist_add_head(&event_recorder_priv->hlist, head); | |
576599a0 | 788 | return 0; |
8020ceb5 | 789 | |
32ce8569 | 790 | sessiond_register_error: |
2e70391c | 791 | free(event_recorder_priv); |
68bb7559 | 792 | priv_error: |
2e70391c | 793 | free(event_recorder->parent); |
80333dfa | 794 | parent_error: |
2e70391c | 795 | free(event_recorder); |
8020ceb5 | 796 | cache_error: |
c785c634 | 797 | create_enum_error: |
32ce8569 | 798 | socket_error: |
576599a0 | 799 | return ret; |
8020ceb5 MD |
800 | } |
801 | ||
d8d2416d | 802 | static |
dc11f93f | 803 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 804 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
805 | struct lttng_event_notifier_group *event_notifier_group) |
806 | { | |
d7d45c0d | 807 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 808 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
809 | struct cds_hlist_head *head; |
810 | int ret = 0; | |
811 | ||
812 | /* | |
813 | * Get the hashtable bucket the created lttng_event_notifier object | |
814 | * should be inserted. | |
815 | */ | |
816 | head = borrow_hash_table_bucket( | |
817 | event_notifier_group->event_notifiers_ht.table, | |
818 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
819 | ||
d7d45c0d | 820 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
821 | if (!event_notifier) { |
822 | ret = -ENOMEM; | |
823 | goto error; | |
824 | } | |
d7d45c0d | 825 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 826 | |
115db533 MD |
827 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
828 | if (!event_notifier->parent) { | |
829 | ret = -ENOMEM; | |
830 | goto parent_error; | |
831 | } | |
832 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 833 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 834 | event_notifier->parent->child = event_notifier; |
115db533 MD |
835 | |
836 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
837 | if (!event_notifier_priv) { | |
838 | ret = -ENOMEM; | |
839 | goto priv_error; | |
840 | } | |
841 | event_notifier->priv = event_notifier_priv; | |
842 | event_notifier_priv->pub = event_notifier; | |
843 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
844 | event_notifier_priv->parent.pub = event_notifier->parent; | |
845 | ||
846 | event_notifier_priv->group = event_notifier_group; | |
847 | event_notifier_priv->parent.user_token = token; | |
848 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
849 | |
850 | /* Event notifier will be enabled by enabler sync. */ | |
115db533 MD |
851 | event_notifier->parent->enabled = 0; |
852 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 853 | |
115db533 | 854 | CDS_INIT_LIST_HEAD(&event_notifier->parent->filter_bytecode_runtime_head); |
d37ecb3f | 855 | CDS_INIT_LIST_HEAD(&event_notifier->capture_bytecode_runtime_head); |
115db533 MD |
856 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
857 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 858 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 859 | |
115db533 | 860 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 861 | &event_notifier_group->event_notifiers_head); |
115db533 | 862 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
863 | |
864 | return 0; | |
865 | ||
115db533 MD |
866 | priv_error: |
867 | free(event_notifier->parent); | |
868 | parent_error: | |
869 | free(event_notifier); | |
d8d2416d FD |
870 | error: |
871 | return ret; | |
872 | } | |
873 | ||
e58095ef | 874 | static |
dc11f93f | 875 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
876 | struct lttng_enabler *enabler) |
877 | { | |
878 | int loglevel = 0; | |
7e2e405c | 879 | unsigned int has_loglevel = 0; |
e58095ef | 880 | |
e450e339 | 881 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 MD |
882 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
883 | desc->name, SIZE_MAX)) | |
e58095ef MD |
884 | return 0; |
885 | if (desc->loglevel) { | |
886 | loglevel = *(*desc->loglevel); | |
887 | has_loglevel = 1; | |
888 | } | |
889 | if (!lttng_loglevel_match(loglevel, | |
890 | has_loglevel, | |
891 | enabler->event_param.loglevel_type, | |
892 | enabler->event_param.loglevel)) | |
893 | return 0; | |
894 | return 1; | |
895 | } | |
896 | ||
897 | static | |
dc11f93f | 898 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
899 | struct lttng_enabler *enabler) |
900 | { | |
901 | int loglevel = 0; | |
902 | unsigned int has_loglevel = 0; | |
903 | ||
e450e339 | 904 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
e58095ef MD |
905 | if (strcmp(desc->name, enabler->event_param.name)) |
906 | return 0; | |
907 | if (desc->loglevel) { | |
908 | loglevel = *(*desc->loglevel); | |
909 | has_loglevel = 1; | |
910 | } | |
911 | if (!lttng_loglevel_match(loglevel, | |
912 | has_loglevel, | |
913 | enabler->event_param.loglevel_type, | |
914 | enabler->event_param.loglevel)) | |
915 | return 0; | |
916 | return 1; | |
917 | } | |
918 | ||
919 | static | |
dc11f93f | 920 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
921 | struct lttng_enabler *enabler) |
922 | { | |
e450e339 FD |
923 | switch (enabler->format_type) { |
924 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
925 | { |
926 | struct lttng_ust_excluder_node *excluder; | |
927 | ||
928 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
929 | return 0; | |
930 | } | |
931 | ||
932 | /* | |
933 | * If the matching event matches with an excluder, | |
934 | * return 'does not match' | |
935 | */ | |
936 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
937 | int count; | |
938 | ||
939 | for (count = 0; count < excluder->excluder.count; count++) { | |
940 | int len; | |
941 | char *excluder_name; | |
942 | ||
943 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
944 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
945 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
1f6f42e6 | 946 | if (len > 0 && strutils_star_glob_match(excluder_name, len, desc->name, SIZE_MAX)) |
196ec2df | 947 | return 0; |
ed5b5bbd JI |
948 | } |
949 | } | |
196ec2df | 950 | return 1; |
ed5b5bbd | 951 | } |
e450e339 | 952 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
953 | return lttng_desc_match_event_enabler(desc, enabler); |
954 | default: | |
955 | return -EINVAL; | |
956 | } | |
957 | } | |
958 | ||
959 | static | |
d871c65b | 960 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 961 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 962 | { |
2e70391c | 963 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 964 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 965 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
966 | return 1; |
967 | else | |
968 | return 0; | |
e58095ef MD |
969 | } |
970 | ||
d8d2416d FD |
971 | static |
972 | int lttng_event_notifier_enabler_match_event_notifier( | |
973 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 974 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 975 | { |
115db533 | 976 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
977 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
978 | ||
115db533 MD |
979 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
980 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
981 | return 1; |
982 | else | |
983 | return 0; | |
984 | } | |
985 | ||
e58095ef | 986 | static |
d871c65b FD |
987 | struct lttng_enabler_ref *lttng_enabler_ref( |
988 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
989 | struct lttng_enabler *enabler) |
990 | { | |
991 | struct lttng_enabler_ref *enabler_ref; | |
992 | ||
d871c65b | 993 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
994 | if (enabler_ref->ref == enabler) |
995 | return enabler_ref; | |
996 | } | |
997 | return NULL; | |
998 | } | |
999 | ||
8020ceb5 | 1000 | /* |
e58095ef MD |
1001 | * Create struct lttng_event if it is missing and present in the list of |
1002 | * tracepoint probes. | |
8020ceb5 | 1003 | */ |
e58095ef | 1004 | static |
ba99fbe2 | 1005 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1006 | { |
f69fe5fb | 1007 | struct lttng_ust_session *session = event_enabler->chan->session; |
dc11f93f MD |
1008 | struct lttng_ust_probe_desc *probe_desc; |
1009 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1010 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1011 | int i; |
1012 | struct cds_list_head *probe_list; | |
1013 | ||
1014 | probe_list = lttng_get_probe_list_head(); | |
1015 | /* | |
1016 | * For each probe event, if we find that a probe event matches | |
1017 | * our enabler, create an associated lttng_event if not | |
1018 | * already present. | |
1019 | */ | |
1020 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1021 | for (i = 0; i < probe_desc->nr_events; i++) { | |
98a97f24 FD |
1022 | int ret; |
1023 | bool found = false; | |
d56fa719 MD |
1024 | struct cds_hlist_head *head; |
1025 | struct cds_hlist_node *node; | |
e58095ef MD |
1026 | |
1027 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1028 | if (!lttng_desc_match_enabler(desc, |
1029 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1030 | continue; |
1031 | ||
fb470188 | 1032 | head = borrow_hash_table_bucket( |
bdb12629 | 1033 | session->priv->events_ht.table, |
fb470188 FD |
1034 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1035 | ||
2e70391c MD |
1036 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1037 | if (event_recorder_priv->parent.desc == desc | |
1038 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1039 | found = true; |
3140bffe FD |
1040 | break; |
1041 | } | |
e58095ef MD |
1042 | } |
1043 | if (found) | |
1044 | continue; | |
1045 | ||
1046 | /* | |
1047 | * We need to create an event for this | |
1048 | * event probe. | |
1049 | */ | |
2e70391c | 1050 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1051 | event_enabler->chan); |
e58095ef | 1052 | if (ret) { |
32ce8569 MD |
1053 | DBG("Unable to create event %s, error %d\n", |
1054 | probe_desc->event_desc[i]->name, ret); | |
e58095ef | 1055 | } |
8165c8da | 1056 | } |
8020ceb5 | 1057 | } |
8020ceb5 MD |
1058 | } |
1059 | ||
a44d07da | 1060 | static |
dc11f93f | 1061 | void probe_provider_event_for_each(struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1062 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1063 | { |
1064 | struct cds_hlist_node *node, *tmp_node; | |
1065 | struct cds_list_head *sessionsp; | |
a44d07da | 1066 | unsigned int i; |
35ac38cb FD |
1067 | |
1068 | /* Get handle on list of sessions. */ | |
7753d283 | 1069 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1070 | |
1071 | /* | |
a44d07da FD |
1072 | * Iterate over all events in the probe provider descriptions and |
1073 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1074 | */ |
1075 | for (i = 0; i < provider_desc->nr_events; i++) { | |
dc11f93f | 1076 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1077 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1078 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1079 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1080 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1081 | struct cds_hlist_head *head; |
35ac38cb FD |
1082 | |
1083 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1084 | |
a44d07da FD |
1085 | /* |
1086 | * Iterate over all session to find the current event | |
1087 | * description. | |
1088 | */ | |
bdb12629 | 1089 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1090 | /* |
a44d07da FD |
1091 | * Get the list of events in the hashtable bucket and |
1092 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1093 | */ |
fb470188 | 1094 | head = borrow_hash_table_bucket( |
bdb12629 | 1095 | session_priv->events_ht.table, |
fb470188 FD |
1096 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1097 | ||
2e70391c MD |
1098 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1099 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1100 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1101 | break; |
1102 | } | |
1103 | } | |
1104 | } | |
d8d2416d FD |
1105 | |
1106 | /* | |
1107 | * Iterate over all event_notifier groups to find the current event | |
1108 | * description. | |
1109 | */ | |
1110 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1111 | /* | |
1112 | * Get the list of event_notifiers in the hashtable bucket and | |
1113 | * iterate to find the event_notifier matching this | |
1114 | * descriptor. | |
1115 | */ | |
1116 | head = borrow_hash_table_bucket( | |
1117 | event_notifier_group->event_notifiers_ht.table, | |
1118 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1119 | ||
115db533 MD |
1120 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1121 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1122 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1123 | break; |
1124 | } | |
1125 | } | |
1126 | } | |
35ac38cb | 1127 | } |
a44d07da FD |
1128 | } |
1129 | ||
1130 | static | |
ba99fbe2 | 1131 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1132 | { |
a44d07da | 1133 | |
ba99fbe2 MD |
1134 | switch (event->type) { |
1135 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1136 | { | |
1137 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
f69fe5fb | 1138 | struct lttng_ust_session *session = event_recorder->chan->session; |
ba99fbe2 MD |
1139 | unsigned int i; |
1140 | ||
1141 | /* Destroy enums of the current event. */ | |
1142 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
891d6b55 | 1143 | const struct lttng_ust_enum_desc *enum_desc; |
25cff019 | 1144 | const struct lttng_ust_event_field *field; |
ba99fbe2 MD |
1145 | struct lttng_enum *curr_enum; |
1146 | ||
25cff019 | 1147 | field = event_recorder->parent->priv->desc->fields[i]; |
ba99fbe2 MD |
1148 | switch (field->type.atype) { |
1149 | case atype_enum_nestable: | |
1150 | enum_desc = field->type.u.enum_nestable.desc; | |
1151 | break; | |
1152 | default: | |
1153 | continue; | |
1154 | } | |
a44d07da | 1155 | |
ba99fbe2 MD |
1156 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1157 | if (curr_enum) { | |
1158 | _lttng_enum_destroy(curr_enum); | |
1159 | } | |
a44d07da | 1160 | } |
ba99fbe2 MD |
1161 | break; |
1162 | } | |
1163 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1164 | break; | |
1165 | default: | |
1166 | abort(); | |
a44d07da | 1167 | } |
a44d07da | 1168 | /* Destroy event. */ |
ba99fbe2 | 1169 | _lttng_event_destroy(event); |
a44d07da FD |
1170 | } |
1171 | ||
1172 | /* | |
1173 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1174 | * the probe provider descriptor received as argument. Must me called with the | |
1175 | * ust_lock held. | |
1176 | */ | |
1177 | void lttng_probe_provider_unregister_events( | |
dc11f93f | 1178 | struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1179 | { |
1180 | /* | |
1181 | * Iterate over all events in the probe provider descriptions and sessions | |
1182 | * to queue the unregistration of the events. | |
1183 | */ | |
ba99fbe2 | 1184 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1185 | |
1186 | /* Wait for grace period. */ | |
b653ddc1 | 1187 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1188 | /* Prune the unregistration queue. */ |
d10a2205 | 1189 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1190 | |
1191 | /* | |
1192 | * It is now safe to destroy the events and remove them from the event list | |
1193 | * and hashtables. | |
1194 | */ | |
ba99fbe2 | 1195 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1196 | } |
1197 | ||
8020ceb5 | 1198 | /* |
d8d2416d | 1199 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1200 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1201 | */ |
1202 | static | |
ba99fbe2 | 1203 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1204 | { |
f69fe5fb | 1205 | struct lttng_ust_session *session = event_enabler->chan->session; |
2e70391c | 1206 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1207 | |
d871c65b | 1208 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1209 | goto end; |
1210 | ||
e58095ef | 1211 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1212 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1213 | |
1214 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1215 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1216 | struct lttng_enabler_ref *enabler_ref; |
1217 | ||
2e70391c | 1218 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1219 | continue; |
1220 | ||
2e70391c | 1221 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1222 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1223 | if (!enabler_ref) { |
1224 | /* | |
1225 | * If no backward ref, create it. | |
1226 | * Add backward ref from event to enabler. | |
1227 | */ | |
1228 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1229 | if (!enabler_ref) | |
1230 | return -ENOMEM; | |
d871c65b FD |
1231 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1232 | event_enabler); | |
e58095ef | 1233 | cds_list_add(&enabler_ref->node, |
2e70391c | 1234 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1235 | } |
e58095ef MD |
1236 | |
1237 | /* | |
1238 | * Link filter bytecodes if not linked yet. | |
1239 | */ | |
2e70391c | 1240 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1241 | &session->priv->ctx, |
2e70391c | 1242 | &event_recorder_priv->pub->parent->filter_bytecode_runtime_head, |
621c07fc | 1243 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1244 | |
1245 | /* TODO: merge event context. */ | |
1246 | } | |
de713d8a | 1247 | end: |
e58095ef MD |
1248 | return 0; |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Called at library load: connect the probe on all enablers matching | |
1253 | * this event. | |
5f733922 | 1254 | * Called with session mutex held. |
e58095ef | 1255 | */ |
5f733922 | 1256 | int lttng_fix_pending_events(void) |
e58095ef | 1257 | { |
bdb12629 | 1258 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1259 | |
bdb12629 MD |
1260 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1261 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1262 | } |
e58095ef MD |
1263 | return 0; |
1264 | } | |
1265 | ||
d8d2416d FD |
1266 | int lttng_fix_pending_event_notifiers(void) |
1267 | { | |
1268 | struct lttng_event_notifier_group *event_notifier_group; | |
1269 | ||
1270 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1271 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1272 | } | |
1273 | return 0; | |
1274 | } | |
1275 | ||
246be17e | 1276 | /* |
37dddb65 MD |
1277 | * For each session of the owner thread, execute pending statedump. |
1278 | * Only dump state for the sessions owned by the caller thread, because | |
1279 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1280 | */ |
3327ac33 | 1281 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1282 | { |
bdb12629 | 1283 | struct lttng_ust_session_private *session_priv; |
246be17e | 1284 | |
37dddb65 | 1285 | /* Execute state dump */ |
cf73e0fe | 1286 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1287 | |
1288 | /* Clear pending state dump */ | |
3327ac33 MD |
1289 | if (ust_lock()) { |
1290 | goto end; | |
1291 | } | |
bdb12629 MD |
1292 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1293 | if (session_priv->owner != owner) | |
37dddb65 | 1294 | continue; |
bdb12629 | 1295 | if (!session_priv->statedump_pending) |
37dddb65 | 1296 | continue; |
bdb12629 | 1297 | session_priv->statedump_pending = 0; |
246be17e | 1298 | } |
3327ac33 | 1299 | end: |
37dddb65 | 1300 | ust_unlock(); |
3327ac33 | 1301 | return; |
246be17e PW |
1302 | } |
1303 | ||
e58095ef | 1304 | static |
ba99fbe2 | 1305 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1306 | { |
1307 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1308 | ||
ba99fbe2 | 1309 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1310 | /* Free event enabler refs */ |
1311 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1312 | &event->priv->enablers_ref_head, node) |
e58095ef | 1313 | free(enabler_ref); |
ba99fbe2 MD |
1314 | |
1315 | switch (event->type) { | |
1316 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1317 | { | |
1318 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1319 | ||
1320 | /* Remove from event list. */ | |
1321 | cds_list_del(&event_recorder->priv->node); | |
1322 | /* Remove from event hash table. */ | |
1323 | cds_hlist_del(&event_recorder->priv->hlist); | |
1324 | ||
1325 | lttng_destroy_context(event_recorder->ctx); | |
1326 | free(event_recorder->parent); | |
1327 | free(event_recorder->priv); | |
1328 | free(event_recorder); | |
1329 | break; | |
1330 | } | |
1331 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1332 | { | |
1333 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1334 | ||
1335 | /* Remove from event list. */ | |
1336 | cds_list_del(&event_notifier->priv->node); | |
1337 | /* Remove from event hash table. */ | |
1338 | cds_hlist_del(&event_notifier->priv->hlist); | |
1339 | ||
1340 | free(event_notifier->priv); | |
1341 | free(event_notifier->parent); | |
1342 | free(event_notifier); | |
1343 | break; | |
1344 | } | |
1345 | default: | |
1346 | abort(); | |
1347 | } | |
8020ceb5 MD |
1348 | } |
1349 | ||
c785c634 MD |
1350 | static |
1351 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1352 | { | |
1353 | cds_list_del(&_enum->node); | |
35ac38cb | 1354 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1355 | free(_enum); |
1356 | } | |
1357 | ||
fd17d7ce | 1358 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1359 | { |
bdb12629 | 1360 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1361 | |
bdb12629 MD |
1362 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1363 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1364 | } |
457a6b58 | 1365 | |
e58095ef MD |
1366 | /* |
1367 | * Enabler management. | |
1368 | */ | |
d871c65b FD |
1369 | struct lttng_event_enabler *lttng_event_enabler_create( |
1370 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1371 | struct lttng_ust_abi_event *event_param, |
e58095ef | 1372 | struct lttng_channel *chan) |
457a6b58 | 1373 | { |
d871c65b | 1374 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1375 | |
d871c65b FD |
1376 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1377 | if (!event_enabler) | |
e58095ef | 1378 | return NULL; |
d871c65b FD |
1379 | event_enabler->base.format_type = format_type; |
1380 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1381 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1382 | memcpy(&event_enabler->base.event_param, event_param, | |
1383 | sizeof(event_enabler->base.event_param)); | |
1384 | event_enabler->chan = chan; | |
e58095ef | 1385 | /* ctx left NULL */ |
d871c65b | 1386 | event_enabler->base.enabled = 0; |
bdb12629 | 1387 | cds_list_add(&event_enabler->node, &event_enabler->chan->session->priv->enablers_head); |
d871c65b FD |
1388 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); |
1389 | ||
1390 | return event_enabler; | |
457a6b58 MD |
1391 | } |
1392 | ||
d8d2416d FD |
1393 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1394 | struct lttng_event_notifier_group *event_notifier_group, | |
1395 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1396 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1397 | { |
1398 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1399 | ||
1400 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1401 | if (!event_notifier_enabler) | |
1402 | return NULL; | |
1403 | event_notifier_enabler->base.format_type = format_type; | |
1404 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1405 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1406 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1407 | ||
1408 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1409 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1410 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1411 | |
1412 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1413 | event_notifier_param->event.name, | |
1414 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1415 | event_notifier_enabler->base.event_param.instrumentation = | |
1416 | event_notifier_param->event.instrumentation; | |
1417 | event_notifier_enabler->base.event_param.loglevel = | |
1418 | event_notifier_param->event.loglevel; | |
1419 | event_notifier_enabler->base.event_param.loglevel_type = | |
1420 | event_notifier_param->event.loglevel_type; | |
1421 | ||
1422 | event_notifier_enabler->base.enabled = 0; | |
1423 | event_notifier_enabler->group = event_notifier_group; | |
1424 | ||
1425 | cds_list_add(&event_notifier_enabler->node, | |
1426 | &event_notifier_group->enablers_head); | |
1427 | ||
1428 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1429 | ||
1430 | return event_notifier_enabler; | |
1431 | } | |
1432 | ||
d871c65b | 1433 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1434 | { |
d871c65b FD |
1435 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
1436 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
1437 | ||
e58095ef | 1438 | return 0; |
457a6b58 | 1439 | } |
457a6b58 | 1440 | |
d871c65b | 1441 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1442 | { |
d871c65b FD |
1443 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
1444 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
1445 | ||
e58095ef MD |
1446 | return 0; |
1447 | } | |
457a6b58 | 1448 | |
d871c65b | 1449 | static |
a56fd376 | 1450 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1451 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1452 | { |
ab89263e MD |
1453 | (*bytecode)->enabler = enabler; |
1454 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1455 | /* Take ownership of bytecode */ | |
1456 | *bytecode = NULL; | |
d871c65b FD |
1457 | } |
1458 | ||
a56fd376 | 1459 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1460 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1461 | { |
a56fd376 | 1462 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1463 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1464 | ||
1465 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
e58095ef | 1466 | return 0; |
0bfb5cbd JI |
1467 | } |
1468 | ||
d871c65b FD |
1469 | static |
1470 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1471 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1472 | { |
e9fe6aad MD |
1473 | (*excluder)->enabler = enabler; |
1474 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1475 | /* Take ownership of excluder */ | |
1476 | *excluder = NULL; | |
d871c65b FD |
1477 | } |
1478 | ||
1479 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1480 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1481 | { |
1482 | _lttng_enabler_attach_exclusion( | |
1483 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1484 | ||
1485 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
0bfb5cbd | 1486 | return 0; |
e58095ef | 1487 | } |
f488575f | 1488 | |
d8d2416d FD |
1489 | int lttng_event_notifier_enabler_enable( |
1490 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1491 | { | |
1492 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1493 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | int lttng_event_notifier_enabler_disable( | |
1499 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1500 | { | |
1501 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1502 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1503 | ||
1504 | return 0; | |
1505 | } | |
1506 | ||
a56fd376 | 1507 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1508 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1509 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1510 | { |
a56fd376 | 1511 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1512 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1513 | bytecode); | |
1514 | ||
1515 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1516 | return 0; | |
1517 | } | |
1518 | ||
d37ecb3f FD |
1519 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1520 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1521 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1522 | { |
49cde654 | 1523 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1524 | event_notifier_enabler); |
49cde654 | 1525 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1526 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1527 | /* Take ownership of bytecode */ |
1528 | *bytecode = NULL; | |
d37ecb3f FD |
1529 | event_notifier_enabler->num_captures++; |
1530 | ||
1531 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1532 | return 0; | |
1533 | } | |
1534 | ||
d8d2416d FD |
1535 | int lttng_event_notifier_enabler_attach_exclusion( |
1536 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1537 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1538 | { |
1539 | _lttng_enabler_attach_exclusion( | |
1540 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1541 | excluder); | |
1542 | ||
1543 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1544 | return 0; | |
1545 | } | |
1546 | ||
fd17d7ce MD |
1547 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1548 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1549 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1550 | { |
457a6b58 | 1551 | /* |
e58095ef MD |
1552 | * We cannot attach a context after trace has been started for a |
1553 | * session because the metadata does not allow expressing this | |
1554 | * information outside of the original channel scope. | |
457a6b58 | 1555 | */ |
bdb12629 | 1556 | if (session->priv->been_active) |
e58095ef | 1557 | return -EPERM; |
457a6b58 | 1558 | |
e58095ef | 1559 | switch (context_param->ctx) { |
fd17d7ce | 1560 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1561 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1562 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1563 | { |
fd17d7ce | 1564 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1565 | |
1566 | perf_ctx_param = &context_param->u.perf_counter; | |
1567 | return lttng_add_perf_counter_to_ctx( | |
1568 | perf_ctx_param->type, | |
1569 | perf_ctx_param->config, | |
1570 | perf_ctx_param->name, | |
1571 | ctx); | |
1572 | } | |
fd17d7ce | 1573 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1574 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1575 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1576 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1577 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1578 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1579 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1580 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1581 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1582 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1583 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1584 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1585 | ctx); | |
fd17d7ce | 1586 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1587 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1588 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1589 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1590 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1591 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1592 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1593 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1594 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1595 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1596 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1597 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1598 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1599 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1600 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1601 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1602 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1603 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1604 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1605 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1606 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1607 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1608 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1609 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1610 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1611 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1612 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1613 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1614 | default: |
1615 | return -EINVAL; | |
457a6b58 | 1616 | } |
457a6b58 MD |
1617 | } |
1618 | ||
d871c65b | 1619 | int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler, |
fd17d7ce | 1620 | struct lttng_ust_abi_context *context_param) |
457a6b58 | 1621 | { |
e58095ef | 1622 | return -ENOSYS; |
457a6b58 MD |
1623 | } |
1624 | ||
d871c65b | 1625 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1626 | { |
d871c65b FD |
1627 | if (!event_enabler) { |
1628 | return; | |
0f63324a | 1629 | } |
d871c65b | 1630 | cds_list_del(&event_enabler->node); |
0f63324a | 1631 | |
d871c65b | 1632 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1633 | |
d871c65b FD |
1634 | lttng_destroy_context(event_enabler->ctx); |
1635 | free(event_enabler); | |
457a6b58 MD |
1636 | } |
1637 | ||
e58095ef | 1638 | /* |
d871c65b | 1639 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1640 | * session. |
1641 | */ | |
457a6b58 | 1642 | static |
f69fe5fb | 1643 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1644 | { |
d871c65b | 1645 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1646 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1647 | |
bdb12629 | 1648 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1649 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1650 | /* |
1651 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1652 | * and its channel and session transient states are enabled, we |
1653 | * enable the event, else we disable it. | |
e58095ef | 1654 | */ |
2e70391c | 1655 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1656 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1657 | struct lttng_ust_bytecode_runtime *runtime; |
dcdeaff0 | 1658 | int enabled = 0, has_enablers_without_bytecode = 0; |
e58095ef MD |
1659 | |
1660 | /* Enable events */ | |
1661 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1662 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1663 | if (enabler_ref->ref->enabled) { |
1664 | enabled = 1; | |
1665 | break; | |
1666 | } | |
1667 | } | |
ac6b4ac6 MD |
1668 | /* |
1669 | * Enabled state is based on union of enablers, with | |
1670 | * intesection of session and channel transient enable | |
1671 | * states. | |
1672 | */ | |
2e70391c | 1673 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->tstate; |
ac6b4ac6 | 1674 | |
2e70391c | 1675 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1676 | /* |
1677 | * Sync tracepoint registration with event enabled | |
1678 | * state. | |
1679 | */ | |
1680 | if (enabled) { | |
2e70391c | 1681 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1682 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1683 | } else { |
2e70391c | 1684 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1685 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1686 | } |
457a6b58 | 1687 | |
1f49fc05 | 1688 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1689 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1690 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1691 | if (enabler_ref->ref->enabled |
1692 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
dcdeaff0 MD |
1693 | has_enablers_without_bytecode = 1; |
1694 | break; | |
1695 | } | |
1696 | } | |
2e70391c | 1697 | event_recorder_priv->pub->parent->has_enablers_without_bytecode = |
dcdeaff0 MD |
1698 | has_enablers_without_bytecode; |
1699 | ||
e58095ef MD |
1700 | /* Enable filters */ |
1701 | cds_list_for_each_entry(runtime, | |
2e70391c | 1702 | &event_recorder_priv->pub->parent->filter_bytecode_runtime_head, node) { |
4d451c15 | 1703 | lttng_bytecode_filter_sync_state(runtime); |
457a6b58 MD |
1704 | } |
1705 | } | |
d10a2205 | 1706 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1707 | } |
1708 | ||
4296085e MD |
1709 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1710 | static | |
dc11f93f | 1711 | bool lttng_ust_probe_supports_event_notifier(struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1712 | { |
1713 | return probe_desc->major >= 2; | |
1714 | } | |
1715 | ||
d8d2416d FD |
1716 | static |
1717 | void lttng_create_event_notifier_if_missing( | |
1718 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1719 | { | |
1720 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
dc11f93f | 1721 | struct lttng_ust_probe_desc *probe_desc; |
d8d2416d FD |
1722 | struct cds_list_head *probe_list; |
1723 | int i; | |
1724 | ||
1725 | probe_list = lttng_get_probe_list_head(); | |
1726 | ||
1727 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1728 | for (i = 0; i < probe_desc->nr_events; i++) { | |
1729 | int ret; | |
1730 | bool found = false; | |
dc11f93f | 1731 | const struct lttng_ust_event_desc *desc; |
115db533 | 1732 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1733 | struct cds_hlist_head *head; |
1734 | struct cds_hlist_node *node; | |
1735 | ||
1736 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1737 | |
d8d2416d FD |
1738 | if (!lttng_desc_match_enabler(desc, |
1739 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1740 | continue; | |
1741 | ||
1742 | /* | |
1743 | * Given the current event_notifier group, get the bucket that | |
1744 | * the target event_notifier would be if it was already | |
1745 | * created. | |
1746 | */ | |
1747 | head = borrow_hash_table_bucket( | |
1748 | event_notifier_group->event_notifiers_ht.table, | |
1749 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1750 | ||
115db533 | 1751 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1752 | /* |
1753 | * Check if event_notifier already exists by checking | |
1754 | * if the event_notifier and enabler share the same | |
1755 | * description and id. | |
1756 | */ | |
115db533 MD |
1757 | if (event_notifier_priv->parent.desc == desc && |
1758 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1759 | found = true; |
1760 | break; | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | if (found) | |
1765 | continue; | |
1766 | ||
4296085e MD |
1767 | /* Check that the probe supports event notifiers, else report the error. */ |
1768 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
1769 | ERR("Probe \"%s\" contains event \"%s\" which matches an enabled event notifier, " | |
1770 | "but its version (%u.%u) is too old and does not implement event notifiers. " | |
1771 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1772 | "this event will not generate any notification.", | |
1773 | probe_desc->provider, | |
1774 | desc->name, | |
1775 | probe_desc->major, | |
1776 | probe_desc->minor); | |
1777 | continue; | |
1778 | } | |
d8d2416d FD |
1779 | /* |
1780 | * We need to create a event_notifier for this event probe. | |
1781 | */ | |
1782 | ret = lttng_event_notifier_create(desc, | |
1783 | event_notifier_enabler->user_token, | |
6566528b | 1784 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1785 | event_notifier_group); |
1786 | if (ret) { | |
1787 | DBG("Unable to create event_notifier %s, error %d\n", | |
1788 | probe_desc->event_desc[i]->name, ret); | |
1789 | } | |
1790 | } | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | /* | |
1795 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1796 | */ | |
1797 | static | |
1798 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1799 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1800 | { | |
1801 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1802 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1803 | |
1804 | /* | |
1805 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1806 | * might still be attaching filter or exclusion to the | |
1807 | * event_notifier_enabler. | |
1808 | */ | |
1809 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1810 | goto end; | |
1811 | ||
1812 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1813 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1814 | ||
1815 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1816 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1817 | struct lttng_enabler_ref *enabler_ref; |
1818 | ||
115db533 | 1819 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1820 | continue; |
1821 | ||
115db533 | 1822 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1823 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1824 | if (!enabler_ref) { | |
1825 | /* | |
1826 | * If no backward ref, create it. | |
1827 | * Add backward ref from event_notifier to enabler. | |
1828 | */ | |
1829 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1830 | if (!enabler_ref) | |
1831 | return -ENOMEM; | |
1832 | ||
1833 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1834 | event_notifier_enabler); | |
1835 | cds_list_add(&enabler_ref->node, | |
115db533 | 1836 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1837 | } |
1838 | ||
1839 | /* | |
1840 | * Link filter bytecodes if not linked yet. | |
1841 | */ | |
115db533 | 1842 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1843 | &event_notifier_group->ctx, |
115db533 | 1844 | &event_notifier_priv->pub->parent->filter_bytecode_runtime_head, |
621c07fc | 1845 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1846 | |
1847 | /* | |
1848 | * Link capture bytecodes if not linked yet. | |
1849 | */ | |
115db533 MD |
1850 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
1851 | &event_notifier_group->ctx, &event_notifier_priv->pub->capture_bytecode_runtime_head, | |
d37ecb3f FD |
1852 | &event_notifier_enabler->capture_bytecode_head); |
1853 | ||
115db533 | 1854 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1855 | } |
1856 | end: | |
1857 | return 0; | |
1858 | } | |
1859 | ||
1860 | static | |
1861 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1862 | { | |
1863 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1864 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1865 | |
1866 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1867 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1868 | ||
1869 | /* | |
1870 | * For each event_notifier, if at least one of its enablers is enabled, | |
1871 | * we enable the event_notifier, else we disable it. | |
1872 | */ | |
115db533 | 1873 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1874 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1875 | struct lttng_ust_bytecode_runtime *runtime; |
d8d2416d FD |
1876 | int enabled = 0, has_enablers_without_bytecode = 0; |
1877 | ||
1878 | /* Enable event_notifiers */ | |
1879 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1880 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1881 | if (enabler_ref->ref->enabled) { |
1882 | enabled = 1; | |
1883 | break; | |
1884 | } | |
1885 | } | |
1886 | ||
115db533 | 1887 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1888 | /* |
1889 | * Sync tracepoint registration with event_notifier enabled | |
1890 | * state. | |
1891 | */ | |
1892 | if (enabled) { | |
115db533 | 1893 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1894 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1895 | } else { |
115db533 | 1896 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1897 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1898 | } |
1899 | ||
1900 | /* Check if has enablers without bytecode enabled */ | |
1901 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1902 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1903 | if (enabler_ref->ref->enabled |
1904 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
1905 | has_enablers_without_bytecode = 1; | |
1906 | break; | |
1907 | } | |
1908 | } | |
115db533 | 1909 | event_notifier_priv->pub->parent->has_enablers_without_bytecode = |
d8d2416d FD |
1910 | has_enablers_without_bytecode; |
1911 | ||
1912 | /* Enable filters */ | |
1913 | cds_list_for_each_entry(runtime, | |
115db533 | 1914 | &event_notifier_priv->pub->parent->filter_bytecode_runtime_head, node) { |
4d451c15 | 1915 | lttng_bytecode_filter_sync_state(runtime); |
d8d2416d | 1916 | } |
d37ecb3f FD |
1917 | |
1918 | /* Enable captures. */ | |
1919 | cds_list_for_each_entry(runtime, | |
115db533 | 1920 | &event_notifier_priv->pub->capture_bytecode_runtime_head, node) { |
d37ecb3f FD |
1921 | lttng_bytecode_capture_sync_state(runtime); |
1922 | } | |
d8d2416d | 1923 | } |
d10a2205 | 1924 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1925 | } |
1926 | ||
e58095ef MD |
1927 | /* |
1928 | * Apply enablers to session events, adding events to session if need | |
1929 | * be. It is required after each modification applied to an active | |
1930 | * session, and right before session "start". | |
1931 | * "lazy" sync means we only sync if required. | |
1932 | */ | |
1933 | static | |
f69fe5fb | 1934 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1935 | { |
e58095ef MD |
1936 | /* We can skip if session is not active */ |
1937 | if (!session->active) | |
1938 | return; | |
d871c65b | 1939 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1940 | } |
53569322 MD |
1941 | |
1942 | /* | |
1943 | * Update all sessions with the given app context. | |
1944 | * Called with ust lock held. | |
1945 | * This is invoked when an application context gets loaded/unloaded. It | |
1946 | * ensures the context callbacks are in sync with the application | |
1947 | * context (either app context callbacks, or dummy callbacks). | |
1948 | */ | |
1949 | void lttng_ust_context_set_session_provider(const char *name, | |
daacdbfc MD |
1950 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1951 | void (*record)(struct lttng_ust_ctx_field *field, | |
53569322 MD |
1952 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
1953 | struct lttng_channel *chan), | |
daacdbfc MD |
1954 | void (*get_value)(struct lttng_ust_ctx_field *field, |
1955 | struct lttng_ust_ctx_value *value)) | |
53569322 | 1956 | { |
bdb12629 | 1957 | struct lttng_ust_session_private *session_priv; |
53569322 | 1958 | |
bdb12629 | 1959 | cds_list_for_each_entry(session_priv, &sessions, node) { |
53569322 | 1960 | struct lttng_channel *chan; |
2e70391c | 1961 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
1962 | int ret; |
1963 | ||
bdb12629 | 1964 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
53569322 MD |
1965 | name, get_size, record, get_value); |
1966 | if (ret) | |
1967 | abort(); | |
bdb12629 | 1968 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
53569322 MD |
1969 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
1970 | name, get_size, record, get_value); | |
1971 | if (ret) | |
1972 | abort(); | |
1973 | } | |
2e70391c MD |
1974 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
1975 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->pub->ctx, | |
53569322 MD |
1976 | name, get_size, record, get_value); |
1977 | if (ret) | |
1978 | abort(); | |
1979 | } | |
1980 | } | |
1981 | } | |
d8d2416d FD |
1982 | |
1983 | /* | |
1984 | * Update all event_notifier groups with the given app context. | |
1985 | * Called with ust lock held. | |
1986 | * This is invoked when an application context gets loaded/unloaded. It | |
1987 | * ensures the context callbacks are in sync with the application | |
1988 | * context (either app context callbacks, or dummy callbacks). | |
1989 | */ | |
1990 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
daacdbfc MD |
1991 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1992 | void (*record)(struct lttng_ust_ctx_field *field, | |
d8d2416d FD |
1993 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
1994 | struct lttng_channel *chan), | |
daacdbfc MD |
1995 | void (*get_value)(struct lttng_ust_ctx_field *field, |
1996 | struct lttng_ust_ctx_value *value)) | |
d8d2416d FD |
1997 | { |
1998 | struct lttng_event_notifier_group *event_notifier_group; | |
1999 | ||
2000 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2001 | int ret; | |
2002 | ||
2003 | ret = lttng_ust_context_set_provider_rcu( | |
2004 | &event_notifier_group->ctx, | |
2005 | name, get_size, record, get_value); | |
2006 | if (ret) | |
2007 | abort(); | |
2008 | } | |
2009 | } |