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; | |
74d81a6c | 242 | channel_destroy(chan, handle, 0); |
f0fde1c3 | 243 | free(lttng_chan); |
74d81a6c MD |
244 | } |
245 | ||
ac6b4ac6 | 246 | static |
ba99fbe2 | 247 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
248 | { |
249 | int ret; | |
a084756d | 250 | struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 251 | |
ba99fbe2 MD |
252 | assert(event->priv->registered == 0); |
253 | desc = event->priv->desc; | |
d10a2205 | 254 | ret = lttng_ust_tp_probe_register_queue_release(desc->name, |
ac6b4ac6 | 255 | desc->probe_callback, |
ba99fbe2 | 256 | event, desc->signature); |
ac6b4ac6 MD |
257 | WARN_ON_ONCE(ret); |
258 | if (!ret) | |
ba99fbe2 | 259 | event->priv->registered = 1; |
ac6b4ac6 MD |
260 | } |
261 | ||
d8d2416d | 262 | static |
ba99fbe2 | 263 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
264 | { |
265 | int ret; | |
a084756d | 266 | struct lttng_ust_event_desc *desc; |
d8d2416d | 267 | |
ba99fbe2 MD |
268 | assert(event->priv->registered == 1); |
269 | desc = event->priv->desc; | |
d10a2205 | 270 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->name, |
ac6b4ac6 | 271 | desc->probe_callback, |
ba99fbe2 | 272 | event); |
ac6b4ac6 MD |
273 | WARN_ON_ONCE(ret); |
274 | if (!ret) | |
ba99fbe2 | 275 | event->priv->registered = 0; |
ac6b4ac6 MD |
276 | } |
277 | ||
d8d2416d | 278 | static |
ba99fbe2 | 279 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 280 | { |
ba99fbe2 MD |
281 | if (event->priv->registered) |
282 | unregister_event(event); | |
d8d2416d FD |
283 | } |
284 | ||
f69fe5fb | 285 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 286 | { |
7dd08bec | 287 | struct lttng_channel *chan, *tmpchan; |
2e70391c | 288 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 289 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 290 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 291 | |
b5234c06 | 292 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 293 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 294 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 295 | } |
b653ddc1 | 296 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 297 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 298 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 299 | &session->priv->enablers_head, node) |
d871c65b | 300 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 301 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 302 | &session->priv->events_head, node) |
ba99fbe2 | 303 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 304 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 305 | &session->priv->enums_head, node) |
c785c634 | 306 | _lttng_enum_destroy(_enum); |
bdb12629 | 307 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
74d81a6c | 308 | _lttng_channel_unmap(chan); |
bdb12629 MD |
309 | cds_list_del(&session->priv->node); |
310 | lttng_destroy_context(session->priv->ctx); | |
311 | free(session->priv); | |
b5234c06 | 312 | free(session); |
8020ceb5 MD |
313 | } |
314 | ||
d8d2416d FD |
315 | void lttng_event_notifier_group_destroy( |
316 | struct lttng_event_notifier_group *event_notifier_group) | |
317 | { | |
318 | int close_ret; | |
319 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 320 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
321 | |
322 | if (!event_notifier_group) { | |
323 | return; | |
324 | } | |
325 | ||
ba99fbe2 | 326 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 327 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 328 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 329 | |
b653ddc1 | 330 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
331 | |
332 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
333 | &event_notifier_group->enablers_head, node) | |
334 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
335 | ||
ba99fbe2 | 336 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 337 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 338 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 339 | |
ebabbf58 MD |
340 | if (event_notifier_group->error_counter) |
341 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
342 | ||
343 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
344 | |
345 | lttng_ust_lock_fd_tracker(); | |
346 | close_ret = close(event_notifier_group->notification_fd); | |
347 | if (!close_ret) { | |
348 | lttng_ust_delete_fd_from_tracker( | |
349 | event_notifier_group->notification_fd); | |
350 | } else { | |
351 | PERROR("close"); | |
352 | abort(); | |
353 | } | |
354 | lttng_ust_unlock_fd_tracker(); | |
355 | ||
356 | cds_list_del(&event_notifier_group->node); | |
357 | ||
358 | free(event_notifier_group); | |
359 | } | |
360 | ||
d871c65b FD |
361 | static |
362 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
363 | { | |
ab249ecf | 364 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
365 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
366 | ||
367 | if (!enabler) { | |
368 | return; | |
369 | } | |
370 | ||
371 | /* Destroy filter bytecode */ | |
372 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
373 | &enabler->filter_bytecode_head, node) { | |
374 | free(filter_node); | |
375 | } | |
376 | ||
377 | /* Destroy excluders */ | |
378 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
379 | &enabler->excluder_head, node) { | |
380 | free(excluder_node); | |
381 | } | |
382 | } | |
383 | ||
d8d2416d FD |
384 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
385 | { | |
386 | if (!event_notifier_enabler) { | |
387 | return; | |
388 | } | |
389 | ||
390 | cds_list_del(&event_notifier_enabler->node); | |
391 | ||
392 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
393 | ||
394 | free(event_notifier_enabler); | |
395 | } | |
396 | ||
53569322 | 397 | static |
a084756d | 398 | int lttng_enum_create(struct lttng_ust_enum_desc *desc, |
f69fe5fb | 399 | struct lttng_ust_session *session) |
53569322 MD |
400 | { |
401 | const char *enum_name = desc->name; | |
402 | struct lttng_enum *_enum; | |
403 | struct cds_hlist_head *head; | |
53569322 MD |
404 | int ret = 0; |
405 | size_t name_len = strlen(enum_name); | |
406 | uint32_t hash; | |
407 | int notify_socket; | |
408 | ||
b33b46f7 | 409 | /* Check if this enum is already registered for this session. */ |
53569322 | 410 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 411 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
412 | |
413 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
414 | if (_enum) { | |
415 | ret = -EEXIST; | |
416 | goto exist; | |
53569322 MD |
417 | } |
418 | ||
bdb12629 | 419 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
420 | if (notify_socket < 0) { |
421 | ret = notify_socket; | |
422 | goto socket_error; | |
423 | } | |
424 | ||
425 | _enum = zmalloc(sizeof(*_enum)); | |
426 | if (!_enum) { | |
427 | ret = -ENOMEM; | |
428 | goto cache_error; | |
429 | } | |
430 | _enum->session = session; | |
431 | _enum->desc = desc; | |
432 | ||
433 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 434 | session->priv->objd, |
53569322 MD |
435 | enum_name, |
436 | desc->nr_entries, | |
437 | desc->entries, | |
438 | &_enum->id); | |
439 | if (ret < 0) { | |
440 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
441 | goto sessiond_register_error; | |
442 | } | |
bdb12629 | 443 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
444 | cds_hlist_add_head(&_enum->hlist, head); |
445 | return 0; | |
446 | ||
447 | sessiond_register_error: | |
448 | free(_enum); | |
449 | cache_error: | |
450 | socket_error: | |
451 | exist: | |
452 | return ret; | |
453 | } | |
454 | ||
455 | static | |
a084756d | 456 | int lttng_create_enum_check(struct lttng_ust_type_common *type, |
f69fe5fb | 457 | struct lttng_ust_session *session) |
53569322 | 458 | { |
a084756d MD |
459 | switch (type->type) { |
460 | case lttng_ust_type_enum: | |
218deb69 | 461 | { |
a084756d | 462 | struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
463 | int ret; |
464 | ||
a084756d | 465 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
466 | ret = lttng_enum_create(enum_desc, session); |
467 | if (ret && ret != -EEXIST) { | |
468 | DBG("Unable to create enum error: (%d)", ret); | |
469 | return ret; | |
470 | } | |
471 | break; | |
472 | } | |
a084756d | 473 | case lttng_ust_type_dynamic: |
53569322 | 474 | { |
a084756d MD |
475 | struct lttng_ust_event_field *tag_field_generic; |
476 | struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
477 | int ret; |
478 | ||
479 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 480 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
481 | ret = lttng_enum_create(enum_desc, session); |
482 | if (ret && ret != -EEXIST) { | |
483 | DBG("Unable to create enum error: (%d)", ret); | |
484 | return ret; | |
485 | } | |
486 | break; | |
487 | } | |
488 | default: | |
489 | /* TODO: nested types when they become supported. */ | |
490 | break; | |
491 | } | |
492 | return 0; | |
493 | } | |
494 | ||
495 | static | |
496 | int lttng_create_all_event_enums(size_t nr_fields, | |
a084756d | 497 | struct lttng_ust_event_field **event_fields, |
f69fe5fb | 498 | struct lttng_ust_session *session) |
53569322 MD |
499 | { |
500 | size_t i; | |
501 | int ret; | |
502 | ||
503 | /* For each field, ensure enum is part of the session. */ | |
504 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 505 | struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
506 | |
507 | ret = lttng_create_enum_check(type, session); | |
508 | if (ret) | |
509 | return ret; | |
510 | } | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static | |
515 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
daacdbfc | 516 | struct lttng_ust_ctx_field **ctx_fields, |
f69fe5fb | 517 | struct lttng_ust_session *session) |
53569322 MD |
518 | { |
519 | size_t i; | |
520 | int ret; | |
521 | ||
522 | /* For each field, ensure enum is part of the session. */ | |
523 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 524 | struct lttng_ust_type_common *type = ctx_fields[i]->event_field->type; |
53569322 MD |
525 | |
526 | ret = lttng_create_enum_check(type, session); | |
527 | if (ret) | |
528 | return ret; | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | ||
710b8ee3 MD |
533 | /* |
534 | * Ensure that a state-dump will be performed for this session at the end | |
535 | * of the current handle_message(). | |
536 | */ | |
f69fe5fb | 537 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 538 | { |
bdb12629 MD |
539 | session->priv->statedump_pending = 1; |
540 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
541 | return 0; |
542 | } | |
53569322 | 543 | |
f69fe5fb | 544 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
545 | { |
546 | int ret = 0; | |
7dd08bec | 547 | struct lttng_channel *chan; |
32ce8569 | 548 | int notify_socket; |
8020ceb5 | 549 | |
8020ceb5 MD |
550 | if (session->active) { |
551 | ret = -EBUSY; | |
552 | goto end; | |
553 | } | |
554 | ||
bdb12629 | 555 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
556 | if (notify_socket < 0) |
557 | return notify_socket; | |
558 | ||
ac6b4ac6 | 559 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 560 | session->priv->tstate = 1; |
e58095ef | 561 | |
3ff7660f | 562 | /* We need to sync enablers with session before activation. */ |
d871c65b | 563 | lttng_session_sync_event_enablers(session); |
3ff7660f | 564 | |
8020ceb5 MD |
565 | /* |
566 | * Snapshot the number of events per channel to know the type of header | |
567 | * we need to use. | |
568 | */ | |
bdb12629 | 569 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 570 | struct lttng_ust_ctx *ctx; |
daacdbfc | 571 | struct lttng_ust_ctx_field **fields = NULL; |
32ce8569 | 572 | size_t nr_fields = 0; |
6ca18e66 | 573 | uint32_t chan_id; |
32ce8569 MD |
574 | |
575 | /* don't change it if session stop/restart */ | |
8020ceb5 | 576 | if (chan->header_type) |
32ce8569 MD |
577 | continue; |
578 | ctx = chan->ctx; | |
579 | if (ctx) { | |
580 | nr_fields = ctx->nr_fields; | |
83e43212 | 581 | fields = ctx->fields; |
53569322 MD |
582 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
583 | session); | |
584 | if (ret < 0) { | |
585 | DBG("Error (%d) adding enum to session", ret); | |
586 | return ret; | |
587 | } | |
32ce8569 MD |
588 | } |
589 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 590 | session, |
bdb12629 | 591 | session->priv->objd, |
32ce8569 MD |
592 | chan->objd, |
593 | nr_fields, | |
594 | fields, | |
6ca18e66 | 595 | &chan_id, |
32ce8569 | 596 | &chan->header_type); |
b869b5ae MD |
597 | if (ret) { |
598 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 599 | return ret; |
b869b5ae | 600 | } |
6ca18e66 MD |
601 | if (chan_id != chan->id) { |
602 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
603 | chan_id, chan->id); | |
604 | return -EINVAL; | |
605 | } | |
8020ceb5 MD |
606 | } |
607 | ||
ac6b4ac6 | 608 | /* Set atomically the state to "active" */ |
b5234c06 | 609 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 610 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 611 | |
710b8ee3 MD |
612 | ret = lttng_session_statedump(session); |
613 | if (ret) | |
614 | return ret; | |
8020ceb5 | 615 | end: |
8020ceb5 MD |
616 | return ret; |
617 | } | |
618 | ||
f69fe5fb | 619 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
620 | { |
621 | int ret = 0; | |
622 | ||
8020ceb5 MD |
623 | if (!session->active) { |
624 | ret = -EBUSY; | |
625 | goto end; | |
626 | } | |
ac6b4ac6 | 627 | /* Set atomically the state to "inactive" */ |
b5234c06 | 628 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
629 | |
630 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 631 | session->priv->tstate = 0; |
d871c65b | 632 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 633 | end: |
8020ceb5 MD |
634 | return ret; |
635 | } | |
636 | ||
7dd08bec | 637 | int lttng_channel_enable(struct lttng_channel *channel) |
976fe9ea | 638 | { |
ac6b4ac6 | 639 | int ret = 0; |
976fe9ea | 640 | |
ac6b4ac6 MD |
641 | if (channel->enabled) { |
642 | ret = -EBUSY; | |
643 | goto end; | |
644 | } | |
645 | /* Set transient enabler state to "enabled" */ | |
646 | channel->tstate = 1; | |
d871c65b | 647 | lttng_session_sync_event_enablers(channel->session); |
ac6b4ac6 MD |
648 | /* Set atomically the state to "enabled" */ |
649 | CMM_ACCESS_ONCE(channel->enabled) = 1; | |
650 | end: | |
651 | return ret; | |
976fe9ea MD |
652 | } |
653 | ||
7dd08bec | 654 | int lttng_channel_disable(struct lttng_channel *channel) |
976fe9ea | 655 | { |
ac6b4ac6 | 656 | int ret = 0; |
976fe9ea | 657 | |
ac6b4ac6 MD |
658 | if (!channel->enabled) { |
659 | ret = -EBUSY; | |
660 | goto end; | |
661 | } | |
662 | /* Set atomically the state to "disabled" */ | |
663 | CMM_ACCESS_ONCE(channel->enabled) = 0; | |
664 | /* Set transient enabler state to "enabled" */ | |
665 | channel->tstate = 0; | |
d871c65b | 666 | lttng_session_sync_event_enablers(channel->session); |
ac6b4ac6 MD |
667 | end: |
668 | return ret; | |
976fe9ea MD |
669 | } |
670 | ||
fb470188 FD |
671 | static inline |
672 | struct cds_hlist_head *borrow_hash_table_bucket( | |
673 | struct cds_hlist_head *hash_table, | |
674 | unsigned int hash_table_size, | |
a084756d | 675 | struct lttng_ust_event_desc *desc) |
fb470188 FD |
676 | { |
677 | const char *event_name; | |
678 | size_t name_len; | |
679 | uint32_t hash; | |
680 | ||
681 | event_name = desc->name; | |
682 | name_len = strlen(event_name); | |
683 | ||
684 | hash = jhash(event_name, name_len, 0); | |
685 | return &hash_table[hash & (hash_table_size - 1)]; | |
686 | } | |
687 | ||
8020ceb5 MD |
688 | /* |
689 | * Supports event creation while tracing session is active. | |
690 | */ | |
e58095ef | 691 | static |
a084756d | 692 | int lttng_event_recorder_create(struct lttng_ust_event_desc *desc, |
e58095ef | 693 | struct lttng_channel *chan) |
8020ceb5 | 694 | { |
2e70391c MD |
695 | struct lttng_ust_event_recorder *event_recorder; |
696 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
f69fe5fb | 697 | struct lttng_ust_session *session = chan->session; |
d56fa719 | 698 | struct cds_hlist_head *head; |
576599a0 | 699 | int ret = 0; |
32ce8569 MD |
700 | int notify_socket, loglevel; |
701 | const char *uri; | |
8020ceb5 | 702 | |
bdb12629 | 703 | head = borrow_hash_table_bucket(chan->session->priv->events_ht.table, |
fb470188 | 704 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 705 | |
bdb12629 | 706 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
707 | if (notify_socket < 0) { |
708 | ret = notify_socket; | |
709 | goto socket_error; | |
710 | } | |
711 | ||
53569322 MD |
712 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
713 | session); | |
c785c634 MD |
714 | if (ret < 0) { |
715 | DBG("Error (%d) adding enum to session", ret); | |
716 | goto create_enum_error; | |
717 | } | |
718 | ||
457a6b58 MD |
719 | /* |
720 | * Check if loglevel match. Refuse to connect event if not. | |
721 | */ | |
2e70391c MD |
722 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
723 | if (!event_recorder) { | |
576599a0 | 724 | ret = -ENOMEM; |
8020ceb5 | 725 | goto cache_error; |
576599a0 | 726 | } |
2e70391c | 727 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 728 | |
7ee76145 | 729 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 730 | if (!event_recorder->parent) { |
80333dfa MD |
731 | ret = -ENOMEM; |
732 | goto parent_error; | |
733 | } | |
7ee76145 | 734 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 735 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 736 | event_recorder->parent->child = event_recorder; |
80333dfa | 737 | |
2e70391c MD |
738 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
739 | if (!event_recorder_priv) { | |
68bb7559 MD |
740 | ret = -ENOMEM; |
741 | goto priv_error; | |
742 | } | |
2e70391c MD |
743 | event_recorder->priv = event_recorder_priv; |
744 | event_recorder_priv->pub = event_recorder; | |
745 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
746 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 747 | |
2e70391c | 748 | event_recorder->chan = chan; |
e58095ef | 749 | |
ac6b4ac6 | 750 | /* Event will be enabled by enabler sync. */ |
2e70391c MD |
751 | event_recorder->parent->enabled = 0; |
752 | event_recorder->parent->priv->registered = 0; | |
753 | CDS_INIT_LIST_HEAD(&event_recorder->parent->filter_bytecode_runtime_head); | |
754 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); | |
755 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
756 | |
757 | if (desc->loglevel) | |
2e70391c | 758 | loglevel = *(*event_recorder->parent->priv->desc->loglevel); |
32ce8569 MD |
759 | else |
760 | loglevel = TRACE_DEFAULT; | |
dc11f93f MD |
761 | if (desc->model_emf_uri) |
762 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
763 | else |
764 | uri = NULL; | |
765 | ||
13b21cd6 MD |
766 | /* Fetch event ID from sessiond */ |
767 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 768 | session, |
bdb12629 | 769 | session->priv->objd, |
13b21cd6 | 770 | chan->objd, |
fb470188 | 771 | desc->name, |
13b21cd6 MD |
772 | loglevel, |
773 | desc->signature, | |
774 | desc->nr_fields, | |
775 | desc->fields, | |
776 | uri, | |
2e70391c | 777 | &event_recorder->id); |
13b21cd6 MD |
778 | if (ret < 0) { |
779 | DBG("Error (%d) registering event to sessiond", ret); | |
780 | goto sessiond_register_error; | |
32ce8569 | 781 | } |
2b213b16 | 782 | |
ba99fbe2 MD |
783 | cds_list_add(&event_recorder_priv->node, &chan->session->priv->events_head); |
784 | cds_hlist_add_head(&event_recorder_priv->hlist, head); | |
576599a0 | 785 | return 0; |
8020ceb5 | 786 | |
32ce8569 | 787 | sessiond_register_error: |
2e70391c | 788 | free(event_recorder_priv); |
68bb7559 | 789 | priv_error: |
2e70391c | 790 | free(event_recorder->parent); |
80333dfa | 791 | parent_error: |
2e70391c | 792 | free(event_recorder); |
8020ceb5 | 793 | cache_error: |
c785c634 | 794 | create_enum_error: |
32ce8569 | 795 | socket_error: |
576599a0 | 796 | return ret; |
8020ceb5 MD |
797 | } |
798 | ||
d8d2416d | 799 | static |
a084756d | 800 | int lttng_event_notifier_create(struct lttng_ust_event_desc *desc, |
6566528b | 801 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
802 | struct lttng_event_notifier_group *event_notifier_group) |
803 | { | |
d7d45c0d | 804 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 805 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
806 | struct cds_hlist_head *head; |
807 | int ret = 0; | |
808 | ||
809 | /* | |
810 | * Get the hashtable bucket the created lttng_event_notifier object | |
811 | * should be inserted. | |
812 | */ | |
813 | head = borrow_hash_table_bucket( | |
814 | event_notifier_group->event_notifiers_ht.table, | |
815 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
816 | ||
d7d45c0d | 817 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
818 | if (!event_notifier) { |
819 | ret = -ENOMEM; | |
820 | goto error; | |
821 | } | |
d7d45c0d | 822 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 823 | |
115db533 MD |
824 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
825 | if (!event_notifier->parent) { | |
826 | ret = -ENOMEM; | |
827 | goto parent_error; | |
828 | } | |
829 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 830 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 831 | event_notifier->parent->child = event_notifier; |
115db533 MD |
832 | |
833 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
834 | if (!event_notifier_priv) { | |
835 | ret = -ENOMEM; | |
836 | goto priv_error; | |
837 | } | |
838 | event_notifier->priv = event_notifier_priv; | |
839 | event_notifier_priv->pub = event_notifier; | |
840 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
841 | event_notifier_priv->parent.pub = event_notifier->parent; | |
842 | ||
843 | event_notifier_priv->group = event_notifier_group; | |
844 | event_notifier_priv->parent.user_token = token; | |
845 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
846 | |
847 | /* Event notifier will be enabled by enabler sync. */ | |
115db533 MD |
848 | event_notifier->parent->enabled = 0; |
849 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 850 | |
115db533 | 851 | CDS_INIT_LIST_HEAD(&event_notifier->parent->filter_bytecode_runtime_head); |
d37ecb3f | 852 | CDS_INIT_LIST_HEAD(&event_notifier->capture_bytecode_runtime_head); |
115db533 MD |
853 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
854 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 855 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 856 | |
115db533 | 857 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 858 | &event_notifier_group->event_notifiers_head); |
115db533 | 859 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
860 | |
861 | return 0; | |
862 | ||
115db533 MD |
863 | priv_error: |
864 | free(event_notifier->parent); | |
865 | parent_error: | |
866 | free(event_notifier); | |
d8d2416d FD |
867 | error: |
868 | return ret; | |
869 | } | |
870 | ||
e58095ef | 871 | static |
a084756d | 872 | int lttng_desc_match_star_glob_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
873 | struct lttng_enabler *enabler) |
874 | { | |
875 | int loglevel = 0; | |
7e2e405c | 876 | unsigned int has_loglevel = 0; |
e58095ef | 877 | |
e450e339 | 878 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 MD |
879 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
880 | desc->name, SIZE_MAX)) | |
e58095ef MD |
881 | return 0; |
882 | if (desc->loglevel) { | |
883 | loglevel = *(*desc->loglevel); | |
884 | has_loglevel = 1; | |
885 | } | |
886 | if (!lttng_loglevel_match(loglevel, | |
887 | has_loglevel, | |
888 | enabler->event_param.loglevel_type, | |
889 | enabler->event_param.loglevel)) | |
890 | return 0; | |
891 | return 1; | |
892 | } | |
893 | ||
894 | static | |
a084756d | 895 | int lttng_desc_match_event_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
896 | struct lttng_enabler *enabler) |
897 | { | |
898 | int loglevel = 0; | |
899 | unsigned int has_loglevel = 0; | |
900 | ||
e450e339 | 901 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
e58095ef MD |
902 | if (strcmp(desc->name, enabler->event_param.name)) |
903 | return 0; | |
904 | if (desc->loglevel) { | |
905 | loglevel = *(*desc->loglevel); | |
906 | has_loglevel = 1; | |
907 | } | |
908 | if (!lttng_loglevel_match(loglevel, | |
909 | has_loglevel, | |
910 | enabler->event_param.loglevel_type, | |
911 | enabler->event_param.loglevel)) | |
912 | return 0; | |
913 | return 1; | |
914 | } | |
915 | ||
916 | static | |
a084756d | 917 | int lttng_desc_match_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
918 | struct lttng_enabler *enabler) |
919 | { | |
e450e339 FD |
920 | switch (enabler->format_type) { |
921 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
922 | { |
923 | struct lttng_ust_excluder_node *excluder; | |
924 | ||
925 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
926 | return 0; | |
927 | } | |
928 | ||
929 | /* | |
930 | * If the matching event matches with an excluder, | |
931 | * return 'does not match' | |
932 | */ | |
933 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
934 | int count; | |
935 | ||
936 | for (count = 0; count < excluder->excluder.count; count++) { | |
937 | int len; | |
938 | char *excluder_name; | |
939 | ||
940 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
941 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
942 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
1f6f42e6 | 943 | if (len > 0 && strutils_star_glob_match(excluder_name, len, desc->name, SIZE_MAX)) |
196ec2df | 944 | return 0; |
ed5b5bbd JI |
945 | } |
946 | } | |
196ec2df | 947 | return 1; |
ed5b5bbd | 948 | } |
e450e339 | 949 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
950 | return lttng_desc_match_event_enabler(desc, enabler); |
951 | default: | |
952 | return -EINVAL; | |
953 | } | |
954 | } | |
955 | ||
956 | static | |
d871c65b | 957 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 958 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 959 | { |
2e70391c | 960 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 961 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 962 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
963 | return 1; |
964 | else | |
965 | return 0; | |
e58095ef MD |
966 | } |
967 | ||
d8d2416d FD |
968 | static |
969 | int lttng_event_notifier_enabler_match_event_notifier( | |
970 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 971 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 972 | { |
115db533 | 973 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
974 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
975 | ||
115db533 MD |
976 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
977 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
978 | return 1; |
979 | else | |
980 | return 0; | |
981 | } | |
982 | ||
e58095ef | 983 | static |
d871c65b FD |
984 | struct lttng_enabler_ref *lttng_enabler_ref( |
985 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
986 | struct lttng_enabler *enabler) |
987 | { | |
988 | struct lttng_enabler_ref *enabler_ref; | |
989 | ||
d871c65b | 990 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
991 | if (enabler_ref->ref == enabler) |
992 | return enabler_ref; | |
993 | } | |
994 | return NULL; | |
995 | } | |
996 | ||
8020ceb5 | 997 | /* |
e58095ef MD |
998 | * Create struct lttng_event if it is missing and present in the list of |
999 | * tracepoint probes. | |
8020ceb5 | 1000 | */ |
e58095ef | 1001 | static |
ba99fbe2 | 1002 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1003 | { |
f69fe5fb | 1004 | struct lttng_ust_session *session = event_enabler->chan->session; |
dc11f93f | 1005 | struct lttng_ust_probe_desc *probe_desc; |
a084756d | 1006 | struct lttng_ust_event_desc *desc; |
2e70391c | 1007 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1008 | int i; |
1009 | struct cds_list_head *probe_list; | |
1010 | ||
1011 | probe_list = lttng_get_probe_list_head(); | |
1012 | /* | |
1013 | * For each probe event, if we find that a probe event matches | |
1014 | * our enabler, create an associated lttng_event if not | |
1015 | * already present. | |
1016 | */ | |
1017 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1018 | for (i = 0; i < probe_desc->nr_events; i++) { | |
98a97f24 FD |
1019 | int ret; |
1020 | bool found = false; | |
d56fa719 MD |
1021 | struct cds_hlist_head *head; |
1022 | struct cds_hlist_node *node; | |
e58095ef MD |
1023 | |
1024 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1025 | if (!lttng_desc_match_enabler(desc, |
1026 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1027 | continue; |
1028 | ||
fb470188 | 1029 | head = borrow_hash_table_bucket( |
bdb12629 | 1030 | session->priv->events_ht.table, |
fb470188 FD |
1031 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1032 | ||
2e70391c MD |
1033 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1034 | if (event_recorder_priv->parent.desc == desc | |
1035 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1036 | found = true; |
3140bffe FD |
1037 | break; |
1038 | } | |
e58095ef MD |
1039 | } |
1040 | if (found) | |
1041 | continue; | |
1042 | ||
1043 | /* | |
1044 | * We need to create an event for this | |
1045 | * event probe. | |
1046 | */ | |
2e70391c | 1047 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1048 | event_enabler->chan); |
e58095ef | 1049 | if (ret) { |
32ce8569 MD |
1050 | DBG("Unable to create event %s, error %d\n", |
1051 | probe_desc->event_desc[i]->name, ret); | |
e58095ef | 1052 | } |
8165c8da | 1053 | } |
8020ceb5 | 1054 | } |
8020ceb5 MD |
1055 | } |
1056 | ||
a44d07da | 1057 | static |
dc11f93f | 1058 | void probe_provider_event_for_each(struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1059 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1060 | { |
1061 | struct cds_hlist_node *node, *tmp_node; | |
1062 | struct cds_list_head *sessionsp; | |
a44d07da | 1063 | unsigned int i; |
35ac38cb FD |
1064 | |
1065 | /* Get handle on list of sessions. */ | |
7753d283 | 1066 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1067 | |
1068 | /* | |
a44d07da FD |
1069 | * Iterate over all events in the probe provider descriptions and |
1070 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1071 | */ |
1072 | for (i = 0; i < provider_desc->nr_events; i++) { | |
a084756d | 1073 | struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1074 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1075 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1076 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1077 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1078 | struct cds_hlist_head *head; |
35ac38cb FD |
1079 | |
1080 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1081 | |
a44d07da FD |
1082 | /* |
1083 | * Iterate over all session to find the current event | |
1084 | * description. | |
1085 | */ | |
bdb12629 | 1086 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1087 | /* |
a44d07da FD |
1088 | * Get the list of events in the hashtable bucket and |
1089 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1090 | */ |
fb470188 | 1091 | head = borrow_hash_table_bucket( |
bdb12629 | 1092 | session_priv->events_ht.table, |
fb470188 FD |
1093 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1094 | ||
2e70391c MD |
1095 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1096 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1097 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1098 | break; |
1099 | } | |
1100 | } | |
1101 | } | |
d8d2416d FD |
1102 | |
1103 | /* | |
1104 | * Iterate over all event_notifier groups to find the current event | |
1105 | * description. | |
1106 | */ | |
1107 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1108 | /* | |
1109 | * Get the list of event_notifiers in the hashtable bucket and | |
1110 | * iterate to find the event_notifier matching this | |
1111 | * descriptor. | |
1112 | */ | |
1113 | head = borrow_hash_table_bucket( | |
1114 | event_notifier_group->event_notifiers_ht.table, | |
1115 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1116 | ||
115db533 MD |
1117 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1118 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1119 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1120 | break; |
1121 | } | |
1122 | } | |
1123 | } | |
35ac38cb | 1124 | } |
a44d07da FD |
1125 | } |
1126 | ||
1127 | static | |
ba99fbe2 | 1128 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1129 | { |
a44d07da | 1130 | |
ba99fbe2 MD |
1131 | switch (event->type) { |
1132 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1133 | { | |
1134 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
f69fe5fb | 1135 | struct lttng_ust_session *session = event_recorder->chan->session; |
ba99fbe2 MD |
1136 | unsigned int i; |
1137 | ||
1138 | /* Destroy enums of the current event. */ | |
1139 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
a084756d MD |
1140 | struct lttng_ust_enum_desc *enum_desc; |
1141 | struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1142 | struct lttng_enum *curr_enum; |
1143 | ||
25cff019 | 1144 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1145 | switch (field->type->type) { |
1146 | case lttng_ust_type_enum: | |
1147 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1148 | break; |
1149 | default: | |
1150 | continue; | |
1151 | } | |
a44d07da | 1152 | |
ba99fbe2 MD |
1153 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1154 | if (curr_enum) { | |
1155 | _lttng_enum_destroy(curr_enum); | |
1156 | } | |
a44d07da | 1157 | } |
ba99fbe2 MD |
1158 | break; |
1159 | } | |
1160 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1161 | break; | |
1162 | default: | |
1163 | abort(); | |
a44d07da | 1164 | } |
a44d07da | 1165 | /* Destroy event. */ |
ba99fbe2 | 1166 | _lttng_event_destroy(event); |
a44d07da FD |
1167 | } |
1168 | ||
1169 | /* | |
1170 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1171 | * the probe provider descriptor received as argument. Must me called with the | |
1172 | * ust_lock held. | |
1173 | */ | |
1174 | void lttng_probe_provider_unregister_events( | |
dc11f93f | 1175 | struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1176 | { |
1177 | /* | |
1178 | * Iterate over all events in the probe provider descriptions and sessions | |
1179 | * to queue the unregistration of the events. | |
1180 | */ | |
ba99fbe2 | 1181 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1182 | |
1183 | /* Wait for grace period. */ | |
b653ddc1 | 1184 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1185 | /* Prune the unregistration queue. */ |
d10a2205 | 1186 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1187 | |
1188 | /* | |
1189 | * It is now safe to destroy the events and remove them from the event list | |
1190 | * and hashtables. | |
1191 | */ | |
ba99fbe2 | 1192 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1193 | } |
1194 | ||
8020ceb5 | 1195 | /* |
d8d2416d | 1196 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1197 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1198 | */ |
1199 | static | |
ba99fbe2 | 1200 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1201 | { |
f69fe5fb | 1202 | struct lttng_ust_session *session = event_enabler->chan->session; |
2e70391c | 1203 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1204 | |
d871c65b | 1205 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1206 | goto end; |
1207 | ||
e58095ef | 1208 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1209 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1210 | |
1211 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1212 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1213 | struct lttng_enabler_ref *enabler_ref; |
1214 | ||
2e70391c | 1215 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1216 | continue; |
1217 | ||
2e70391c | 1218 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1219 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1220 | if (!enabler_ref) { |
1221 | /* | |
1222 | * If no backward ref, create it. | |
1223 | * Add backward ref from event to enabler. | |
1224 | */ | |
1225 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1226 | if (!enabler_ref) | |
1227 | return -ENOMEM; | |
d871c65b FD |
1228 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1229 | event_enabler); | |
e58095ef | 1230 | cds_list_add(&enabler_ref->node, |
2e70391c | 1231 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1232 | } |
e58095ef MD |
1233 | |
1234 | /* | |
1235 | * Link filter bytecodes if not linked yet. | |
1236 | */ | |
2e70391c | 1237 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1238 | &session->priv->ctx, |
2e70391c | 1239 | &event_recorder_priv->pub->parent->filter_bytecode_runtime_head, |
621c07fc | 1240 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1241 | |
1242 | /* TODO: merge event context. */ | |
1243 | } | |
de713d8a | 1244 | end: |
e58095ef MD |
1245 | return 0; |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Called at library load: connect the probe on all enablers matching | |
1250 | * this event. | |
5f733922 | 1251 | * Called with session mutex held. |
e58095ef | 1252 | */ |
5f733922 | 1253 | int lttng_fix_pending_events(void) |
e58095ef | 1254 | { |
bdb12629 | 1255 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1256 | |
bdb12629 MD |
1257 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1258 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1259 | } |
e58095ef MD |
1260 | return 0; |
1261 | } | |
1262 | ||
d8d2416d FD |
1263 | int lttng_fix_pending_event_notifiers(void) |
1264 | { | |
1265 | struct lttng_event_notifier_group *event_notifier_group; | |
1266 | ||
1267 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1268 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1269 | } | |
1270 | return 0; | |
1271 | } | |
1272 | ||
246be17e | 1273 | /* |
37dddb65 MD |
1274 | * For each session of the owner thread, execute pending statedump. |
1275 | * Only dump state for the sessions owned by the caller thread, because | |
1276 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1277 | */ |
3327ac33 | 1278 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1279 | { |
bdb12629 | 1280 | struct lttng_ust_session_private *session_priv; |
246be17e | 1281 | |
37dddb65 | 1282 | /* Execute state dump */ |
cf73e0fe | 1283 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1284 | |
1285 | /* Clear pending state dump */ | |
3327ac33 MD |
1286 | if (ust_lock()) { |
1287 | goto end; | |
1288 | } | |
bdb12629 MD |
1289 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1290 | if (session_priv->owner != owner) | |
37dddb65 | 1291 | continue; |
bdb12629 | 1292 | if (!session_priv->statedump_pending) |
37dddb65 | 1293 | continue; |
bdb12629 | 1294 | session_priv->statedump_pending = 0; |
246be17e | 1295 | } |
3327ac33 | 1296 | end: |
37dddb65 | 1297 | ust_unlock(); |
3327ac33 | 1298 | return; |
246be17e PW |
1299 | } |
1300 | ||
e58095ef | 1301 | static |
ba99fbe2 | 1302 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1303 | { |
1304 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1305 | ||
ba99fbe2 | 1306 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1307 | /* Free event enabler refs */ |
1308 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1309 | &event->priv->enablers_ref_head, node) |
e58095ef | 1310 | free(enabler_ref); |
ba99fbe2 MD |
1311 | |
1312 | switch (event->type) { | |
1313 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1314 | { | |
1315 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1316 | ||
1317 | /* Remove from event list. */ | |
1318 | cds_list_del(&event_recorder->priv->node); | |
1319 | /* Remove from event hash table. */ | |
1320 | cds_hlist_del(&event_recorder->priv->hlist); | |
1321 | ||
1322 | lttng_destroy_context(event_recorder->ctx); | |
1323 | free(event_recorder->parent); | |
1324 | free(event_recorder->priv); | |
1325 | free(event_recorder); | |
1326 | break; | |
1327 | } | |
1328 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1329 | { | |
1330 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1331 | ||
1332 | /* Remove from event list. */ | |
1333 | cds_list_del(&event_notifier->priv->node); | |
1334 | /* Remove from event hash table. */ | |
1335 | cds_hlist_del(&event_notifier->priv->hlist); | |
1336 | ||
1337 | free(event_notifier->priv); | |
1338 | free(event_notifier->parent); | |
1339 | free(event_notifier); | |
1340 | break; | |
1341 | } | |
1342 | default: | |
1343 | abort(); | |
1344 | } | |
8020ceb5 MD |
1345 | } |
1346 | ||
c785c634 MD |
1347 | static |
1348 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1349 | { | |
1350 | cds_list_del(&_enum->node); | |
35ac38cb | 1351 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1352 | free(_enum); |
1353 | } | |
1354 | ||
fd17d7ce | 1355 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1356 | { |
bdb12629 | 1357 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1358 | |
bdb12629 MD |
1359 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1360 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1361 | } |
457a6b58 | 1362 | |
e58095ef MD |
1363 | /* |
1364 | * Enabler management. | |
1365 | */ | |
d871c65b FD |
1366 | struct lttng_event_enabler *lttng_event_enabler_create( |
1367 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1368 | struct lttng_ust_abi_event *event_param, |
e58095ef | 1369 | struct lttng_channel *chan) |
457a6b58 | 1370 | { |
d871c65b | 1371 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1372 | |
d871c65b FD |
1373 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1374 | if (!event_enabler) | |
e58095ef | 1375 | return NULL; |
d871c65b FD |
1376 | event_enabler->base.format_type = format_type; |
1377 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1378 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1379 | memcpy(&event_enabler->base.event_param, event_param, | |
1380 | sizeof(event_enabler->base.event_param)); | |
1381 | event_enabler->chan = chan; | |
e58095ef | 1382 | /* ctx left NULL */ |
d871c65b | 1383 | event_enabler->base.enabled = 0; |
bdb12629 | 1384 | cds_list_add(&event_enabler->node, &event_enabler->chan->session->priv->enablers_head); |
d871c65b FD |
1385 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); |
1386 | ||
1387 | return event_enabler; | |
457a6b58 MD |
1388 | } |
1389 | ||
d8d2416d FD |
1390 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1391 | struct lttng_event_notifier_group *event_notifier_group, | |
1392 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1393 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1394 | { |
1395 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1396 | ||
1397 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1398 | if (!event_notifier_enabler) | |
1399 | return NULL; | |
1400 | event_notifier_enabler->base.format_type = format_type; | |
1401 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1402 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1403 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1404 | ||
1405 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1406 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1407 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1408 | |
1409 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1410 | event_notifier_param->event.name, | |
1411 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1412 | event_notifier_enabler->base.event_param.instrumentation = | |
1413 | event_notifier_param->event.instrumentation; | |
1414 | event_notifier_enabler->base.event_param.loglevel = | |
1415 | event_notifier_param->event.loglevel; | |
1416 | event_notifier_enabler->base.event_param.loglevel_type = | |
1417 | event_notifier_param->event.loglevel_type; | |
1418 | ||
1419 | event_notifier_enabler->base.enabled = 0; | |
1420 | event_notifier_enabler->group = event_notifier_group; | |
1421 | ||
1422 | cds_list_add(&event_notifier_enabler->node, | |
1423 | &event_notifier_group->enablers_head); | |
1424 | ||
1425 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1426 | ||
1427 | return event_notifier_enabler; | |
1428 | } | |
1429 | ||
d871c65b | 1430 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1431 | { |
d871c65b FD |
1432 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
1433 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
1434 | ||
e58095ef | 1435 | return 0; |
457a6b58 | 1436 | } |
457a6b58 | 1437 | |
d871c65b | 1438 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1439 | { |
d871c65b FD |
1440 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
1441 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
1442 | ||
e58095ef MD |
1443 | return 0; |
1444 | } | |
457a6b58 | 1445 | |
d871c65b | 1446 | static |
a56fd376 | 1447 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1448 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1449 | { |
ab89263e MD |
1450 | (*bytecode)->enabler = enabler; |
1451 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1452 | /* Take ownership of bytecode */ | |
1453 | *bytecode = NULL; | |
d871c65b FD |
1454 | } |
1455 | ||
a56fd376 | 1456 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1457 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1458 | { |
a56fd376 | 1459 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1460 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1461 | ||
1462 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
e58095ef | 1463 | return 0; |
0bfb5cbd JI |
1464 | } |
1465 | ||
d871c65b FD |
1466 | static |
1467 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1468 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1469 | { |
e9fe6aad MD |
1470 | (*excluder)->enabler = enabler; |
1471 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1472 | /* Take ownership of excluder */ | |
1473 | *excluder = NULL; | |
d871c65b FD |
1474 | } |
1475 | ||
1476 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1477 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1478 | { |
1479 | _lttng_enabler_attach_exclusion( | |
1480 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1481 | ||
1482 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->session); | |
0bfb5cbd | 1483 | return 0; |
e58095ef | 1484 | } |
f488575f | 1485 | |
d8d2416d FD |
1486 | int lttng_event_notifier_enabler_enable( |
1487 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1488 | { | |
1489 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1490 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1491 | ||
1492 | return 0; | |
1493 | } | |
1494 | ||
1495 | int lttng_event_notifier_enabler_disable( | |
1496 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1497 | { | |
1498 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1499 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
a56fd376 | 1504 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1505 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1506 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1507 | { |
a56fd376 | 1508 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1509 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1510 | bytecode); | |
1511 | ||
1512 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1513 | return 0; | |
1514 | } | |
1515 | ||
d37ecb3f FD |
1516 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1517 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1518 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1519 | { |
49cde654 | 1520 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1521 | event_notifier_enabler); |
49cde654 | 1522 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1523 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1524 | /* Take ownership of bytecode */ |
1525 | *bytecode = NULL; | |
d37ecb3f FD |
1526 | event_notifier_enabler->num_captures++; |
1527 | ||
1528 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1529 | return 0; | |
1530 | } | |
1531 | ||
d8d2416d FD |
1532 | int lttng_event_notifier_enabler_attach_exclusion( |
1533 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1534 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1535 | { |
1536 | _lttng_enabler_attach_exclusion( | |
1537 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1538 | excluder); | |
1539 | ||
1540 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1541 | return 0; | |
1542 | } | |
1543 | ||
fd17d7ce MD |
1544 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1545 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1546 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1547 | { |
457a6b58 | 1548 | /* |
e58095ef MD |
1549 | * We cannot attach a context after trace has been started for a |
1550 | * session because the metadata does not allow expressing this | |
1551 | * information outside of the original channel scope. | |
457a6b58 | 1552 | */ |
bdb12629 | 1553 | if (session->priv->been_active) |
e58095ef | 1554 | return -EPERM; |
457a6b58 | 1555 | |
e58095ef | 1556 | switch (context_param->ctx) { |
fd17d7ce | 1557 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1558 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1559 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1560 | { |
fd17d7ce | 1561 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1562 | |
1563 | perf_ctx_param = &context_param->u.perf_counter; | |
1564 | return lttng_add_perf_counter_to_ctx( | |
1565 | perf_ctx_param->type, | |
1566 | perf_ctx_param->config, | |
1567 | perf_ctx_param->name, | |
1568 | ctx); | |
1569 | } | |
fd17d7ce | 1570 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1571 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1572 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1573 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1574 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1575 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1576 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1577 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1578 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1579 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1580 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1581 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1582 | ctx); | |
fd17d7ce | 1583 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1584 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1585 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1586 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1587 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1588 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1589 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1590 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1591 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1592 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1593 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1594 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1595 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1596 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1597 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1598 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1599 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1600 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1601 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1602 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1603 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1604 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1605 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1606 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1607 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1608 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1609 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1610 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1611 | default: |
1612 | return -EINVAL; | |
457a6b58 | 1613 | } |
457a6b58 MD |
1614 | } |
1615 | ||
d871c65b | 1616 | int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler, |
fd17d7ce | 1617 | struct lttng_ust_abi_context *context_param) |
457a6b58 | 1618 | { |
e58095ef | 1619 | return -ENOSYS; |
457a6b58 MD |
1620 | } |
1621 | ||
d871c65b | 1622 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1623 | { |
d871c65b FD |
1624 | if (!event_enabler) { |
1625 | return; | |
0f63324a | 1626 | } |
d871c65b | 1627 | cds_list_del(&event_enabler->node); |
0f63324a | 1628 | |
d871c65b | 1629 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1630 | |
d871c65b FD |
1631 | lttng_destroy_context(event_enabler->ctx); |
1632 | free(event_enabler); | |
457a6b58 MD |
1633 | } |
1634 | ||
e58095ef | 1635 | /* |
d871c65b | 1636 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1637 | * session. |
1638 | */ | |
457a6b58 | 1639 | static |
f69fe5fb | 1640 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1641 | { |
d871c65b | 1642 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1643 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1644 | |
bdb12629 | 1645 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1646 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1647 | /* |
1648 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1649 | * and its channel and session transient states are enabled, we |
1650 | * enable the event, else we disable it. | |
e58095ef | 1651 | */ |
2e70391c | 1652 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1653 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1654 | struct lttng_ust_bytecode_runtime *runtime; |
dcdeaff0 | 1655 | int enabled = 0, has_enablers_without_bytecode = 0; |
e58095ef MD |
1656 | |
1657 | /* Enable events */ | |
1658 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1659 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1660 | if (enabler_ref->ref->enabled) { |
1661 | enabled = 1; | |
1662 | break; | |
1663 | } | |
1664 | } | |
ac6b4ac6 MD |
1665 | /* |
1666 | * Enabled state is based on union of enablers, with | |
1667 | * intesection of session and channel transient enable | |
1668 | * states. | |
1669 | */ | |
2e70391c | 1670 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->tstate; |
ac6b4ac6 | 1671 | |
2e70391c | 1672 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1673 | /* |
1674 | * Sync tracepoint registration with event enabled | |
1675 | * state. | |
1676 | */ | |
1677 | if (enabled) { | |
2e70391c | 1678 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1679 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1680 | } else { |
2e70391c | 1681 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1682 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1683 | } |
457a6b58 | 1684 | |
1f49fc05 | 1685 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1686 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1687 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1688 | if (enabler_ref->ref->enabled |
1689 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
dcdeaff0 MD |
1690 | has_enablers_without_bytecode = 1; |
1691 | break; | |
1692 | } | |
1693 | } | |
2e70391c | 1694 | event_recorder_priv->pub->parent->has_enablers_without_bytecode = |
dcdeaff0 MD |
1695 | has_enablers_without_bytecode; |
1696 | ||
e58095ef MD |
1697 | /* Enable filters */ |
1698 | cds_list_for_each_entry(runtime, | |
2e70391c | 1699 | &event_recorder_priv->pub->parent->filter_bytecode_runtime_head, node) { |
4d451c15 | 1700 | lttng_bytecode_filter_sync_state(runtime); |
457a6b58 MD |
1701 | } |
1702 | } | |
d10a2205 | 1703 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1704 | } |
1705 | ||
4296085e MD |
1706 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1707 | static | |
dc11f93f | 1708 | bool lttng_ust_probe_supports_event_notifier(struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1709 | { |
1710 | return probe_desc->major >= 2; | |
1711 | } | |
1712 | ||
d8d2416d FD |
1713 | static |
1714 | void lttng_create_event_notifier_if_missing( | |
1715 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1716 | { | |
1717 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
dc11f93f | 1718 | struct lttng_ust_probe_desc *probe_desc; |
d8d2416d FD |
1719 | struct cds_list_head *probe_list; |
1720 | int i; | |
1721 | ||
1722 | probe_list = lttng_get_probe_list_head(); | |
1723 | ||
1724 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1725 | for (i = 0; i < probe_desc->nr_events; i++) { | |
1726 | int ret; | |
1727 | bool found = false; | |
a084756d | 1728 | struct lttng_ust_event_desc *desc; |
115db533 | 1729 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1730 | struct cds_hlist_head *head; |
1731 | struct cds_hlist_node *node; | |
1732 | ||
1733 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1734 | |
d8d2416d FD |
1735 | if (!lttng_desc_match_enabler(desc, |
1736 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1737 | continue; | |
1738 | ||
1739 | /* | |
1740 | * Given the current event_notifier group, get the bucket that | |
1741 | * the target event_notifier would be if it was already | |
1742 | * created. | |
1743 | */ | |
1744 | head = borrow_hash_table_bucket( | |
1745 | event_notifier_group->event_notifiers_ht.table, | |
1746 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1747 | ||
115db533 | 1748 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1749 | /* |
1750 | * Check if event_notifier already exists by checking | |
1751 | * if the event_notifier and enabler share the same | |
1752 | * description and id. | |
1753 | */ | |
115db533 MD |
1754 | if (event_notifier_priv->parent.desc == desc && |
1755 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1756 | found = true; |
1757 | break; | |
1758 | } | |
1759 | } | |
1760 | ||
1761 | if (found) | |
1762 | continue; | |
1763 | ||
4296085e MD |
1764 | /* Check that the probe supports event notifiers, else report the error. */ |
1765 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
1766 | ERR("Probe \"%s\" contains event \"%s\" which matches an enabled event notifier, " | |
1767 | "but its version (%u.%u) is too old and does not implement event notifiers. " | |
1768 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1769 | "this event will not generate any notification.", | |
1770 | probe_desc->provider, | |
1771 | desc->name, | |
1772 | probe_desc->major, | |
1773 | probe_desc->minor); | |
1774 | continue; | |
1775 | } | |
d8d2416d FD |
1776 | /* |
1777 | * We need to create a event_notifier for this event probe. | |
1778 | */ | |
1779 | ret = lttng_event_notifier_create(desc, | |
1780 | event_notifier_enabler->user_token, | |
6566528b | 1781 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1782 | event_notifier_group); |
1783 | if (ret) { | |
1784 | DBG("Unable to create event_notifier %s, error %d\n", | |
1785 | probe_desc->event_desc[i]->name, ret); | |
1786 | } | |
1787 | } | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | /* | |
1792 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1793 | */ | |
1794 | static | |
1795 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1796 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1797 | { | |
1798 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1799 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1800 | |
1801 | /* | |
1802 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1803 | * might still be attaching filter or exclusion to the | |
1804 | * event_notifier_enabler. | |
1805 | */ | |
1806 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1807 | goto end; | |
1808 | ||
1809 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1810 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1811 | ||
1812 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1813 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1814 | struct lttng_enabler_ref *enabler_ref; |
1815 | ||
115db533 | 1816 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1817 | continue; |
1818 | ||
115db533 | 1819 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1820 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1821 | if (!enabler_ref) { | |
1822 | /* | |
1823 | * If no backward ref, create it. | |
1824 | * Add backward ref from event_notifier to enabler. | |
1825 | */ | |
1826 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1827 | if (!enabler_ref) | |
1828 | return -ENOMEM; | |
1829 | ||
1830 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1831 | event_notifier_enabler); | |
1832 | cds_list_add(&enabler_ref->node, | |
115db533 | 1833 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1834 | } |
1835 | ||
1836 | /* | |
1837 | * Link filter bytecodes if not linked yet. | |
1838 | */ | |
115db533 | 1839 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1840 | &event_notifier_group->ctx, |
115db533 | 1841 | &event_notifier_priv->pub->parent->filter_bytecode_runtime_head, |
621c07fc | 1842 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1843 | |
1844 | /* | |
1845 | * Link capture bytecodes if not linked yet. | |
1846 | */ | |
115db533 MD |
1847 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
1848 | &event_notifier_group->ctx, &event_notifier_priv->pub->capture_bytecode_runtime_head, | |
d37ecb3f FD |
1849 | &event_notifier_enabler->capture_bytecode_head); |
1850 | ||
115db533 | 1851 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1852 | } |
1853 | end: | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static | |
1858 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1859 | { | |
1860 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1861 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1862 | |
1863 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1864 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1865 | ||
1866 | /* | |
1867 | * For each event_notifier, if at least one of its enablers is enabled, | |
1868 | * we enable the event_notifier, else we disable it. | |
1869 | */ | |
115db533 | 1870 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1871 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1872 | struct lttng_ust_bytecode_runtime *runtime; |
d8d2416d FD |
1873 | int enabled = 0, has_enablers_without_bytecode = 0; |
1874 | ||
1875 | /* Enable event_notifiers */ | |
1876 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1877 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1878 | if (enabler_ref->ref->enabled) { |
1879 | enabled = 1; | |
1880 | break; | |
1881 | } | |
1882 | } | |
1883 | ||
115db533 | 1884 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1885 | /* |
1886 | * Sync tracepoint registration with event_notifier enabled | |
1887 | * state. | |
1888 | */ | |
1889 | if (enabled) { | |
115db533 | 1890 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1891 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1892 | } else { |
115db533 | 1893 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1894 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1895 | } |
1896 | ||
1897 | /* Check if has enablers without bytecode enabled */ | |
1898 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1899 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1900 | if (enabler_ref->ref->enabled |
1901 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
1902 | has_enablers_without_bytecode = 1; | |
1903 | break; | |
1904 | } | |
1905 | } | |
115db533 | 1906 | event_notifier_priv->pub->parent->has_enablers_without_bytecode = |
d8d2416d FD |
1907 | has_enablers_without_bytecode; |
1908 | ||
1909 | /* Enable filters */ | |
1910 | cds_list_for_each_entry(runtime, | |
115db533 | 1911 | &event_notifier_priv->pub->parent->filter_bytecode_runtime_head, node) { |
4d451c15 | 1912 | lttng_bytecode_filter_sync_state(runtime); |
d8d2416d | 1913 | } |
d37ecb3f FD |
1914 | |
1915 | /* Enable captures. */ | |
1916 | cds_list_for_each_entry(runtime, | |
115db533 | 1917 | &event_notifier_priv->pub->capture_bytecode_runtime_head, node) { |
d37ecb3f FD |
1918 | lttng_bytecode_capture_sync_state(runtime); |
1919 | } | |
d8d2416d | 1920 | } |
d10a2205 | 1921 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1922 | } |
1923 | ||
e58095ef MD |
1924 | /* |
1925 | * Apply enablers to session events, adding events to session if need | |
1926 | * be. It is required after each modification applied to an active | |
1927 | * session, and right before session "start". | |
1928 | * "lazy" sync means we only sync if required. | |
1929 | */ | |
1930 | static | |
f69fe5fb | 1931 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1932 | { |
e58095ef MD |
1933 | /* We can skip if session is not active */ |
1934 | if (!session->active) | |
1935 | return; | |
d871c65b | 1936 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1937 | } |
53569322 MD |
1938 | |
1939 | /* | |
1940 | * Update all sessions with the given app context. | |
1941 | * Called with ust lock held. | |
1942 | * This is invoked when an application context gets loaded/unloaded. It | |
1943 | * ensures the context callbacks are in sync with the application | |
1944 | * context (either app context callbacks, or dummy callbacks). | |
1945 | */ | |
1946 | void lttng_ust_context_set_session_provider(const char *name, | |
daacdbfc MD |
1947 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1948 | void (*record)(struct lttng_ust_ctx_field *field, | |
53569322 MD |
1949 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
1950 | struct lttng_channel *chan), | |
daacdbfc MD |
1951 | void (*get_value)(struct lttng_ust_ctx_field *field, |
1952 | struct lttng_ust_ctx_value *value)) | |
53569322 | 1953 | { |
bdb12629 | 1954 | struct lttng_ust_session_private *session_priv; |
53569322 | 1955 | |
bdb12629 | 1956 | cds_list_for_each_entry(session_priv, &sessions, node) { |
53569322 | 1957 | struct lttng_channel *chan; |
2e70391c | 1958 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
1959 | int ret; |
1960 | ||
bdb12629 | 1961 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
53569322 MD |
1962 | name, get_size, record, get_value); |
1963 | if (ret) | |
1964 | abort(); | |
bdb12629 | 1965 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
53569322 MD |
1966 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
1967 | name, get_size, record, get_value); | |
1968 | if (ret) | |
1969 | abort(); | |
1970 | } | |
2e70391c MD |
1971 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
1972 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->pub->ctx, | |
53569322 MD |
1973 | name, get_size, record, get_value); |
1974 | if (ret) | |
1975 | abort(); | |
1976 | } | |
1977 | } | |
1978 | } | |
d8d2416d FD |
1979 | |
1980 | /* | |
1981 | * Update all event_notifier groups with the given app context. | |
1982 | * Called with ust lock held. | |
1983 | * This is invoked when an application context gets loaded/unloaded. It | |
1984 | * ensures the context callbacks are in sync with the application | |
1985 | * context (either app context callbacks, or dummy callbacks). | |
1986 | */ | |
1987 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
daacdbfc MD |
1988 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1989 | void (*record)(struct lttng_ust_ctx_field *field, | |
d8d2416d FD |
1990 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
1991 | struct lttng_channel *chan), | |
daacdbfc MD |
1992 | void (*get_value)(struct lttng_ust_ctx_field *field, |
1993 | struct lttng_ust_ctx_value *value)) | |
d8d2416d FD |
1994 | { |
1995 | struct lttng_event_notifier_group *event_notifier_group; | |
1996 | ||
1997 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1998 | int ret; | |
1999 | ||
2000 | ret = lttng_ust_context_set_provider_rcu( | |
2001 | &event_notifier_group->ctx, | |
2002 | name, get_size, record, get_value); | |
2003 | if (ret) | |
2004 | abort(); | |
2005 | } | |
2006 | } |