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 | |
e7bc0ef6 | 233 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 234 | { |
5198080d | 235 | struct lttng_ust_lib_ring_buffer_channel *chan; |
74d81a6c MD |
236 | struct lttng_ust_shm_handle *handle; |
237 | ||
e7bc0ef6 | 238 | cds_list_del(<tng_chan->priv->node); |
0950190a | 239 | lttng_destroy_context(lttng_chan->priv->ctx); |
74d81a6c MD |
240 | chan = lttng_chan->chan; |
241 | handle = lttng_chan->handle; | |
74d81a6c | 242 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
243 | free(lttng_chan->parent); |
244 | free(lttng_chan->priv); | |
f0fde1c3 | 245 | free(lttng_chan); |
74d81a6c MD |
246 | } |
247 | ||
ac6b4ac6 | 248 | static |
ba99fbe2 | 249 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
250 | { |
251 | int ret; | |
a084756d | 252 | struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 253 | |
ba99fbe2 MD |
254 | assert(event->priv->registered == 0); |
255 | desc = event->priv->desc; | |
d10a2205 | 256 | ret = lttng_ust_tp_probe_register_queue_release(desc->name, |
ac6b4ac6 | 257 | desc->probe_callback, |
ba99fbe2 | 258 | event, desc->signature); |
ac6b4ac6 MD |
259 | WARN_ON_ONCE(ret); |
260 | if (!ret) | |
ba99fbe2 | 261 | event->priv->registered = 1; |
ac6b4ac6 MD |
262 | } |
263 | ||
d8d2416d | 264 | static |
ba99fbe2 | 265 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
266 | { |
267 | int ret; | |
a084756d | 268 | struct lttng_ust_event_desc *desc; |
d8d2416d | 269 | |
ba99fbe2 MD |
270 | assert(event->priv->registered == 1); |
271 | desc = event->priv->desc; | |
d10a2205 | 272 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->name, |
ac6b4ac6 | 273 | desc->probe_callback, |
ba99fbe2 | 274 | event); |
ac6b4ac6 MD |
275 | WARN_ON_ONCE(ret); |
276 | if (!ret) | |
ba99fbe2 | 277 | event->priv->registered = 0; |
ac6b4ac6 MD |
278 | } |
279 | ||
d8d2416d | 280 | static |
ba99fbe2 | 281 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 282 | { |
ba99fbe2 MD |
283 | if (event->priv->registered) |
284 | unregister_event(event); | |
d8d2416d FD |
285 | } |
286 | ||
f69fe5fb | 287 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 288 | { |
e7bc0ef6 | 289 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 290 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 291 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 292 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 293 | |
b5234c06 | 294 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 295 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 296 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 297 | } |
b653ddc1 | 298 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 299 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 300 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 301 | &session->priv->enablers_head, node) |
d871c65b | 302 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 303 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 304 | &session->priv->events_head, node) |
ba99fbe2 | 305 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 306 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 307 | &session->priv->enums_head, node) |
c785c634 | 308 | _lttng_enum_destroy(_enum); |
bdb12629 | 309 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 310 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
311 | cds_list_del(&session->priv->node); |
312 | lttng_destroy_context(session->priv->ctx); | |
313 | free(session->priv); | |
b5234c06 | 314 | free(session); |
8020ceb5 MD |
315 | } |
316 | ||
d8d2416d FD |
317 | void lttng_event_notifier_group_destroy( |
318 | struct lttng_event_notifier_group *event_notifier_group) | |
319 | { | |
320 | int close_ret; | |
321 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 322 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
323 | |
324 | if (!event_notifier_group) { | |
325 | return; | |
326 | } | |
327 | ||
ba99fbe2 | 328 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 329 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 330 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 331 | |
b653ddc1 | 332 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
333 | |
334 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
335 | &event_notifier_group->enablers_head, node) | |
336 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
337 | ||
ba99fbe2 | 338 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 339 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 340 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 341 | |
ebabbf58 MD |
342 | if (event_notifier_group->error_counter) |
343 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
344 | ||
345 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
346 | |
347 | lttng_ust_lock_fd_tracker(); | |
348 | close_ret = close(event_notifier_group->notification_fd); | |
349 | if (!close_ret) { | |
350 | lttng_ust_delete_fd_from_tracker( | |
351 | event_notifier_group->notification_fd); | |
352 | } else { | |
353 | PERROR("close"); | |
354 | abort(); | |
355 | } | |
356 | lttng_ust_unlock_fd_tracker(); | |
357 | ||
358 | cds_list_del(&event_notifier_group->node); | |
359 | ||
360 | free(event_notifier_group); | |
361 | } | |
362 | ||
d871c65b FD |
363 | static |
364 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
365 | { | |
ab249ecf | 366 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
367 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
368 | ||
369 | if (!enabler) { | |
370 | return; | |
371 | } | |
372 | ||
373 | /* Destroy filter bytecode */ | |
374 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
375 | &enabler->filter_bytecode_head, node) { | |
376 | free(filter_node); | |
377 | } | |
378 | ||
379 | /* Destroy excluders */ | |
380 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
381 | &enabler->excluder_head, node) { | |
382 | free(excluder_node); | |
383 | } | |
384 | } | |
385 | ||
d8d2416d FD |
386 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
387 | { | |
388 | if (!event_notifier_enabler) { | |
389 | return; | |
390 | } | |
391 | ||
392 | cds_list_del(&event_notifier_enabler->node); | |
393 | ||
394 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
395 | ||
396 | free(event_notifier_enabler); | |
397 | } | |
398 | ||
53569322 | 399 | static |
a084756d | 400 | int lttng_enum_create(struct lttng_ust_enum_desc *desc, |
f69fe5fb | 401 | struct lttng_ust_session *session) |
53569322 MD |
402 | { |
403 | const char *enum_name = desc->name; | |
404 | struct lttng_enum *_enum; | |
405 | struct cds_hlist_head *head; | |
53569322 MD |
406 | int ret = 0; |
407 | size_t name_len = strlen(enum_name); | |
408 | uint32_t hash; | |
409 | int notify_socket; | |
410 | ||
b33b46f7 | 411 | /* Check if this enum is already registered for this session. */ |
53569322 | 412 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 413 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
414 | |
415 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
416 | if (_enum) { | |
417 | ret = -EEXIST; | |
418 | goto exist; | |
53569322 MD |
419 | } |
420 | ||
bdb12629 | 421 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
422 | if (notify_socket < 0) { |
423 | ret = notify_socket; | |
424 | goto socket_error; | |
425 | } | |
426 | ||
427 | _enum = zmalloc(sizeof(*_enum)); | |
428 | if (!_enum) { | |
429 | ret = -ENOMEM; | |
430 | goto cache_error; | |
431 | } | |
432 | _enum->session = session; | |
433 | _enum->desc = desc; | |
434 | ||
435 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 436 | session->priv->objd, |
53569322 MD |
437 | enum_name, |
438 | desc->nr_entries, | |
439 | desc->entries, | |
440 | &_enum->id); | |
441 | if (ret < 0) { | |
442 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
443 | goto sessiond_register_error; | |
444 | } | |
bdb12629 | 445 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
446 | cds_hlist_add_head(&_enum->hlist, head); |
447 | return 0; | |
448 | ||
449 | sessiond_register_error: | |
450 | free(_enum); | |
451 | cache_error: | |
452 | socket_error: | |
453 | exist: | |
454 | return ret; | |
455 | } | |
456 | ||
457 | static | |
a084756d | 458 | int lttng_create_enum_check(struct lttng_ust_type_common *type, |
f69fe5fb | 459 | struct lttng_ust_session *session) |
53569322 | 460 | { |
a084756d MD |
461 | switch (type->type) { |
462 | case lttng_ust_type_enum: | |
218deb69 | 463 | { |
a084756d | 464 | struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
465 | int ret; |
466 | ||
a084756d | 467 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
468 | ret = lttng_enum_create(enum_desc, session); |
469 | if (ret && ret != -EEXIST) { | |
470 | DBG("Unable to create enum error: (%d)", ret); | |
471 | return ret; | |
472 | } | |
473 | break; | |
474 | } | |
a084756d | 475 | case lttng_ust_type_dynamic: |
53569322 | 476 | { |
a084756d MD |
477 | struct lttng_ust_event_field *tag_field_generic; |
478 | struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
479 | int ret; |
480 | ||
481 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 482 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
483 | ret = lttng_enum_create(enum_desc, session); |
484 | if (ret && ret != -EEXIST) { | |
485 | DBG("Unable to create enum error: (%d)", ret); | |
486 | return ret; | |
487 | } | |
488 | break; | |
489 | } | |
490 | default: | |
491 | /* TODO: nested types when they become supported. */ | |
492 | break; | |
493 | } | |
494 | return 0; | |
495 | } | |
496 | ||
497 | static | |
498 | int lttng_create_all_event_enums(size_t nr_fields, | |
a084756d | 499 | struct lttng_ust_event_field **event_fields, |
f69fe5fb | 500 | struct lttng_ust_session *session) |
53569322 MD |
501 | { |
502 | size_t i; | |
503 | int ret; | |
504 | ||
505 | /* For each field, ensure enum is part of the session. */ | |
506 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 507 | struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
508 | |
509 | ret = lttng_create_enum_check(type, session); | |
510 | if (ret) | |
511 | return ret; | |
512 | } | |
513 | return 0; | |
514 | } | |
515 | ||
516 | static | |
517 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
daacdbfc | 518 | struct lttng_ust_ctx_field **ctx_fields, |
f69fe5fb | 519 | struct lttng_ust_session *session) |
53569322 MD |
520 | { |
521 | size_t i; | |
522 | int ret; | |
523 | ||
524 | /* For each field, ensure enum is part of the session. */ | |
525 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 526 | struct lttng_ust_type_common *type = ctx_fields[i]->event_field->type; |
53569322 MD |
527 | |
528 | ret = lttng_create_enum_check(type, session); | |
529 | if (ret) | |
530 | return ret; | |
531 | } | |
532 | return 0; | |
533 | } | |
534 | ||
710b8ee3 MD |
535 | /* |
536 | * Ensure that a state-dump will be performed for this session at the end | |
537 | * of the current handle_message(). | |
538 | */ | |
f69fe5fb | 539 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 540 | { |
bdb12629 MD |
541 | session->priv->statedump_pending = 1; |
542 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
543 | return 0; |
544 | } | |
53569322 | 545 | |
f69fe5fb | 546 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
547 | { |
548 | int ret = 0; | |
e7bc0ef6 | 549 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 550 | int notify_socket; |
8020ceb5 | 551 | |
8020ceb5 MD |
552 | if (session->active) { |
553 | ret = -EBUSY; | |
554 | goto end; | |
555 | } | |
556 | ||
bdb12629 | 557 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
558 | if (notify_socket < 0) |
559 | return notify_socket; | |
560 | ||
ac6b4ac6 | 561 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 562 | session->priv->tstate = 1; |
e58095ef | 563 | |
3ff7660f | 564 | /* We need to sync enablers with session before activation. */ |
d871c65b | 565 | lttng_session_sync_event_enablers(session); |
3ff7660f | 566 | |
8020ceb5 MD |
567 | /* |
568 | * Snapshot the number of events per channel to know the type of header | |
569 | * we need to use. | |
570 | */ | |
bdb12629 | 571 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 572 | struct lttng_ust_ctx *ctx; |
daacdbfc | 573 | struct lttng_ust_ctx_field **fields = NULL; |
32ce8569 | 574 | size_t nr_fields = 0; |
6ca18e66 | 575 | uint32_t chan_id; |
32ce8569 MD |
576 | |
577 | /* don't change it if session stop/restart */ | |
8020ceb5 | 578 | if (chan->header_type) |
32ce8569 | 579 | continue; |
0950190a | 580 | ctx = chan->ctx; |
32ce8569 MD |
581 | if (ctx) { |
582 | nr_fields = ctx->nr_fields; | |
83e43212 | 583 | fields = ctx->fields; |
53569322 MD |
584 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
585 | session); | |
586 | if (ret < 0) { | |
587 | DBG("Error (%d) adding enum to session", ret); | |
588 | return ret; | |
589 | } | |
32ce8569 MD |
590 | } |
591 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 592 | session, |
bdb12629 | 593 | session->priv->objd, |
e7bc0ef6 | 594 | chan->parent.objd, |
32ce8569 MD |
595 | nr_fields, |
596 | fields, | |
6ca18e66 | 597 | &chan_id, |
32ce8569 | 598 | &chan->header_type); |
b869b5ae MD |
599 | if (ret) { |
600 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 601 | return ret; |
b869b5ae | 602 | } |
6ca18e66 MD |
603 | if (chan_id != chan->id) { |
604 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
605 | chan_id, chan->id); | |
606 | return -EINVAL; | |
607 | } | |
8020ceb5 MD |
608 | } |
609 | ||
ac6b4ac6 | 610 | /* Set atomically the state to "active" */ |
b5234c06 | 611 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 612 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 613 | |
710b8ee3 MD |
614 | ret = lttng_session_statedump(session); |
615 | if (ret) | |
616 | return ret; | |
8020ceb5 | 617 | end: |
8020ceb5 MD |
618 | return ret; |
619 | } | |
620 | ||
f69fe5fb | 621 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
622 | { |
623 | int ret = 0; | |
624 | ||
8020ceb5 MD |
625 | if (!session->active) { |
626 | ret = -EBUSY; | |
627 | goto end; | |
628 | } | |
ac6b4ac6 | 629 | /* Set atomically the state to "inactive" */ |
b5234c06 | 630 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
631 | |
632 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 633 | session->priv->tstate = 0; |
d871c65b | 634 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 635 | end: |
8020ceb5 MD |
636 | return ret; |
637 | } | |
638 | ||
e7bc0ef6 | 639 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 640 | { |
ac6b4ac6 | 641 | int ret = 0; |
976fe9ea | 642 | |
e7bc0ef6 | 643 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
644 | ret = -EBUSY; |
645 | goto end; | |
646 | } | |
647 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
648 | lttng_channel->priv->tstate = 1; |
649 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 650 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 651 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
652 | end: |
653 | return ret; | |
976fe9ea MD |
654 | } |
655 | ||
e7bc0ef6 | 656 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 657 | { |
ac6b4ac6 | 658 | int ret = 0; |
976fe9ea | 659 | |
e7bc0ef6 | 660 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
661 | ret = -EBUSY; |
662 | goto end; | |
663 | } | |
664 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 665 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 666 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
667 | lttng_channel->priv->tstate = 0; |
668 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
669 | end: |
670 | return ret; | |
976fe9ea MD |
671 | } |
672 | ||
fb470188 FD |
673 | static inline |
674 | struct cds_hlist_head *borrow_hash_table_bucket( | |
675 | struct cds_hlist_head *hash_table, | |
676 | unsigned int hash_table_size, | |
a084756d | 677 | struct lttng_ust_event_desc *desc) |
fb470188 FD |
678 | { |
679 | const char *event_name; | |
680 | size_t name_len; | |
681 | uint32_t hash; | |
682 | ||
683 | event_name = desc->name; | |
684 | name_len = strlen(event_name); | |
685 | ||
686 | hash = jhash(event_name, name_len, 0); | |
687 | return &hash_table[hash & (hash_table_size - 1)]; | |
688 | } | |
689 | ||
8020ceb5 MD |
690 | /* |
691 | * Supports event creation while tracing session is active. | |
692 | */ | |
e58095ef | 693 | static |
a084756d | 694 | int lttng_event_recorder_create(struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 695 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 696 | { |
2e70391c MD |
697 | struct lttng_ust_event_recorder *event_recorder; |
698 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 699 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 700 | struct cds_hlist_head *head; |
576599a0 | 701 | int ret = 0; |
32ce8569 MD |
702 | int notify_socket, loglevel; |
703 | const char *uri; | |
8020ceb5 | 704 | |
e7bc0ef6 | 705 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 706 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 707 | |
bdb12629 | 708 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
709 | if (notify_socket < 0) { |
710 | ret = notify_socket; | |
711 | goto socket_error; | |
712 | } | |
713 | ||
53569322 MD |
714 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
715 | session); | |
c785c634 MD |
716 | if (ret < 0) { |
717 | DBG("Error (%d) adding enum to session", ret); | |
718 | goto create_enum_error; | |
719 | } | |
720 | ||
457a6b58 MD |
721 | /* |
722 | * Check if loglevel match. Refuse to connect event if not. | |
723 | */ | |
2e70391c MD |
724 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
725 | if (!event_recorder) { | |
576599a0 | 726 | ret = -ENOMEM; |
8020ceb5 | 727 | goto cache_error; |
576599a0 | 728 | } |
2e70391c | 729 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 730 | |
7ee76145 | 731 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 732 | if (!event_recorder->parent) { |
80333dfa MD |
733 | ret = -ENOMEM; |
734 | goto parent_error; | |
735 | } | |
7ee76145 | 736 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 737 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 738 | event_recorder->parent->child = event_recorder; |
80333dfa | 739 | |
2e70391c MD |
740 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
741 | if (!event_recorder_priv) { | |
68bb7559 MD |
742 | ret = -ENOMEM; |
743 | goto priv_error; | |
744 | } | |
2e70391c MD |
745 | event_recorder->priv = event_recorder_priv; |
746 | event_recorder_priv->pub = event_recorder; | |
747 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
748 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 749 | |
2e70391c | 750 | event_recorder->chan = chan; |
e58095ef | 751 | |
ac6b4ac6 | 752 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 753 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
754 | event_recorder->parent->enabled = 0; |
755 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 756 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
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, |
e7bc0ef6 | 773 | chan->priv->parent.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 | |
e7bc0ef6 | 786 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 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 |
a084756d | 803 | int lttng_event_notifier_create(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. */ | |
a2e4d05e | 851 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
852 | event_notifier->parent->enabled = 0; |
853 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 854 | |
a2e4d05e MD |
855 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
856 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
857 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
858 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 859 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 860 | |
115db533 | 861 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 862 | &event_notifier_group->event_notifiers_head); |
115db533 | 863 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
864 | |
865 | return 0; | |
866 | ||
115db533 MD |
867 | priv_error: |
868 | free(event_notifier->parent); | |
869 | parent_error: | |
870 | free(event_notifier); | |
d8d2416d FD |
871 | error: |
872 | return ret; | |
873 | } | |
874 | ||
e58095ef | 875 | static |
a084756d | 876 | int lttng_desc_match_star_glob_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
877 | struct lttng_enabler *enabler) |
878 | { | |
879 | int loglevel = 0; | |
7e2e405c | 880 | unsigned int has_loglevel = 0; |
e58095ef | 881 | |
e450e339 | 882 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 MD |
883 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
884 | desc->name, SIZE_MAX)) | |
e58095ef MD |
885 | return 0; |
886 | if (desc->loglevel) { | |
887 | loglevel = *(*desc->loglevel); | |
888 | has_loglevel = 1; | |
889 | } | |
890 | if (!lttng_loglevel_match(loglevel, | |
891 | has_loglevel, | |
892 | enabler->event_param.loglevel_type, | |
893 | enabler->event_param.loglevel)) | |
894 | return 0; | |
895 | return 1; | |
896 | } | |
897 | ||
898 | static | |
a084756d | 899 | int lttng_desc_match_event_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
900 | struct lttng_enabler *enabler) |
901 | { | |
902 | int loglevel = 0; | |
903 | unsigned int has_loglevel = 0; | |
904 | ||
e450e339 | 905 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
e58095ef MD |
906 | if (strcmp(desc->name, enabler->event_param.name)) |
907 | return 0; | |
908 | if (desc->loglevel) { | |
909 | loglevel = *(*desc->loglevel); | |
910 | has_loglevel = 1; | |
911 | } | |
912 | if (!lttng_loglevel_match(loglevel, | |
913 | has_loglevel, | |
914 | enabler->event_param.loglevel_type, | |
915 | enabler->event_param.loglevel)) | |
916 | return 0; | |
917 | return 1; | |
918 | } | |
919 | ||
920 | static | |
a084756d | 921 | int lttng_desc_match_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
922 | struct lttng_enabler *enabler) |
923 | { | |
e450e339 FD |
924 | switch (enabler->format_type) { |
925 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
926 | { |
927 | struct lttng_ust_excluder_node *excluder; | |
928 | ||
929 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
930 | return 0; | |
931 | } | |
932 | ||
933 | /* | |
934 | * If the matching event matches with an excluder, | |
935 | * return 'does not match' | |
936 | */ | |
937 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
938 | int count; | |
939 | ||
940 | for (count = 0; count < excluder->excluder.count; count++) { | |
941 | int len; | |
942 | char *excluder_name; | |
943 | ||
944 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
945 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
946 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
1f6f42e6 | 947 | if (len > 0 && strutils_star_glob_match(excluder_name, len, desc->name, SIZE_MAX)) |
196ec2df | 948 | return 0; |
ed5b5bbd JI |
949 | } |
950 | } | |
196ec2df | 951 | return 1; |
ed5b5bbd | 952 | } |
e450e339 | 953 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
954 | return lttng_desc_match_event_enabler(desc, enabler); |
955 | default: | |
956 | return -EINVAL; | |
957 | } | |
958 | } | |
959 | ||
960 | static | |
d871c65b | 961 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 962 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 963 | { |
2e70391c | 964 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 965 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 966 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
967 | return 1; |
968 | else | |
969 | return 0; | |
e58095ef MD |
970 | } |
971 | ||
d8d2416d FD |
972 | static |
973 | int lttng_event_notifier_enabler_match_event_notifier( | |
974 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 975 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 976 | { |
115db533 | 977 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
978 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
979 | ||
115db533 MD |
980 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
981 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
982 | return 1; |
983 | else | |
984 | return 0; | |
985 | } | |
986 | ||
e58095ef | 987 | static |
d871c65b FD |
988 | struct lttng_enabler_ref *lttng_enabler_ref( |
989 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
990 | struct lttng_enabler *enabler) |
991 | { | |
992 | struct lttng_enabler_ref *enabler_ref; | |
993 | ||
d871c65b | 994 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
995 | if (enabler_ref->ref == enabler) |
996 | return enabler_ref; | |
997 | } | |
998 | return NULL; | |
999 | } | |
1000 | ||
8020ceb5 | 1001 | /* |
e58095ef MD |
1002 | * Create struct lttng_event if it is missing and present in the list of |
1003 | * tracepoint probes. | |
8020ceb5 | 1004 | */ |
e58095ef | 1005 | static |
ba99fbe2 | 1006 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1007 | { |
e7bc0ef6 | 1008 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
dc11f93f | 1009 | struct lttng_ust_probe_desc *probe_desc; |
a084756d | 1010 | struct lttng_ust_event_desc *desc; |
2e70391c | 1011 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1012 | int i; |
1013 | struct cds_list_head *probe_list; | |
1014 | ||
1015 | probe_list = lttng_get_probe_list_head(); | |
1016 | /* | |
1017 | * For each probe event, if we find that a probe event matches | |
1018 | * our enabler, create an associated lttng_event if not | |
1019 | * already present. | |
1020 | */ | |
1021 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1022 | for (i = 0; i < probe_desc->nr_events; i++) { | |
98a97f24 FD |
1023 | int ret; |
1024 | bool found = false; | |
d56fa719 MD |
1025 | struct cds_hlist_head *head; |
1026 | struct cds_hlist_node *node; | |
e58095ef MD |
1027 | |
1028 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1029 | if (!lttng_desc_match_enabler(desc, |
1030 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1031 | continue; |
1032 | ||
fb470188 | 1033 | head = borrow_hash_table_bucket( |
bdb12629 | 1034 | session->priv->events_ht.table, |
fb470188 FD |
1035 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1036 | ||
2e70391c MD |
1037 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1038 | if (event_recorder_priv->parent.desc == desc | |
1039 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1040 | found = true; |
3140bffe FD |
1041 | break; |
1042 | } | |
e58095ef MD |
1043 | } |
1044 | if (found) | |
1045 | continue; | |
1046 | ||
1047 | /* | |
1048 | * We need to create an event for this | |
1049 | * event probe. | |
1050 | */ | |
2e70391c | 1051 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1052 | event_enabler->chan); |
e58095ef | 1053 | if (ret) { |
32ce8569 MD |
1054 | DBG("Unable to create event %s, error %d\n", |
1055 | probe_desc->event_desc[i]->name, ret); | |
e58095ef | 1056 | } |
8165c8da | 1057 | } |
8020ceb5 | 1058 | } |
8020ceb5 MD |
1059 | } |
1060 | ||
a44d07da | 1061 | static |
dc11f93f | 1062 | void probe_provider_event_for_each(struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1063 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1064 | { |
1065 | struct cds_hlist_node *node, *tmp_node; | |
1066 | struct cds_list_head *sessionsp; | |
a44d07da | 1067 | unsigned int i; |
35ac38cb FD |
1068 | |
1069 | /* Get handle on list of sessions. */ | |
7753d283 | 1070 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1071 | |
1072 | /* | |
a44d07da FD |
1073 | * Iterate over all events in the probe provider descriptions and |
1074 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1075 | */ |
1076 | for (i = 0; i < provider_desc->nr_events; i++) { | |
a084756d | 1077 | struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1078 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1079 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1080 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1081 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1082 | struct cds_hlist_head *head; |
35ac38cb FD |
1083 | |
1084 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1085 | |
a44d07da FD |
1086 | /* |
1087 | * Iterate over all session to find the current event | |
1088 | * description. | |
1089 | */ | |
bdb12629 | 1090 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1091 | /* |
a44d07da FD |
1092 | * Get the list of events in the hashtable bucket and |
1093 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1094 | */ |
fb470188 | 1095 | head = borrow_hash_table_bucket( |
bdb12629 | 1096 | session_priv->events_ht.table, |
fb470188 FD |
1097 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1098 | ||
2e70391c MD |
1099 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1100 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1101 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1102 | break; |
1103 | } | |
1104 | } | |
1105 | } | |
d8d2416d FD |
1106 | |
1107 | /* | |
1108 | * Iterate over all event_notifier groups to find the current event | |
1109 | * description. | |
1110 | */ | |
1111 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1112 | /* | |
1113 | * Get the list of event_notifiers in the hashtable bucket and | |
1114 | * iterate to find the event_notifier matching this | |
1115 | * descriptor. | |
1116 | */ | |
1117 | head = borrow_hash_table_bucket( | |
1118 | event_notifier_group->event_notifiers_ht.table, | |
1119 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1120 | ||
115db533 MD |
1121 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1122 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1123 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1124 | break; |
1125 | } | |
1126 | } | |
1127 | } | |
35ac38cb | 1128 | } |
a44d07da FD |
1129 | } |
1130 | ||
1131 | static | |
ba99fbe2 | 1132 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1133 | { |
a44d07da | 1134 | |
ba99fbe2 MD |
1135 | switch (event->type) { |
1136 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1137 | { | |
1138 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1139 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1140 | unsigned int i; |
1141 | ||
1142 | /* Destroy enums of the current event. */ | |
1143 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
a084756d MD |
1144 | struct lttng_ust_enum_desc *enum_desc; |
1145 | struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1146 | struct lttng_enum *curr_enum; |
1147 | ||
25cff019 | 1148 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1149 | switch (field->type->type) { |
1150 | case lttng_ust_type_enum: | |
1151 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1152 | break; |
1153 | default: | |
1154 | continue; | |
1155 | } | |
a44d07da | 1156 | |
ba99fbe2 MD |
1157 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1158 | if (curr_enum) { | |
1159 | _lttng_enum_destroy(curr_enum); | |
1160 | } | |
a44d07da | 1161 | } |
ba99fbe2 MD |
1162 | break; |
1163 | } | |
1164 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1165 | break; | |
1166 | default: | |
1167 | abort(); | |
a44d07da | 1168 | } |
a44d07da | 1169 | /* Destroy event. */ |
ba99fbe2 | 1170 | _lttng_event_destroy(event); |
a44d07da FD |
1171 | } |
1172 | ||
1173 | /* | |
1174 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1175 | * the probe provider descriptor received as argument. Must me called with the | |
1176 | * ust_lock held. | |
1177 | */ | |
1178 | void lttng_probe_provider_unregister_events( | |
dc11f93f | 1179 | struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1180 | { |
1181 | /* | |
1182 | * Iterate over all events in the probe provider descriptions and sessions | |
1183 | * to queue the unregistration of the events. | |
1184 | */ | |
ba99fbe2 | 1185 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1186 | |
1187 | /* Wait for grace period. */ | |
b653ddc1 | 1188 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1189 | /* Prune the unregistration queue. */ |
d10a2205 | 1190 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1191 | |
1192 | /* | |
1193 | * It is now safe to destroy the events and remove them from the event list | |
1194 | * and hashtables. | |
1195 | */ | |
ba99fbe2 | 1196 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1197 | } |
1198 | ||
8020ceb5 | 1199 | /* |
d8d2416d | 1200 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1201 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1202 | */ |
1203 | static | |
ba99fbe2 | 1204 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1205 | { |
e7bc0ef6 | 1206 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1207 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1208 | |
d871c65b | 1209 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1210 | goto end; |
1211 | ||
e58095ef | 1212 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1213 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1214 | |
1215 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1216 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1217 | struct lttng_enabler_ref *enabler_ref; |
1218 | ||
2e70391c | 1219 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1220 | continue; |
1221 | ||
2e70391c | 1222 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1223 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1224 | if (!enabler_ref) { |
1225 | /* | |
1226 | * If no backward ref, create it. | |
1227 | * Add backward ref from event to enabler. | |
1228 | */ | |
1229 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1230 | if (!enabler_ref) | |
1231 | return -ENOMEM; | |
d871c65b FD |
1232 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1233 | event_enabler); | |
e58095ef | 1234 | cds_list_add(&enabler_ref->node, |
2e70391c | 1235 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1236 | } |
e58095ef MD |
1237 | |
1238 | /* | |
1239 | * Link filter bytecodes if not linked yet. | |
1240 | */ | |
2e70391c | 1241 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1242 | &session->priv->ctx, |
a2e4d05e | 1243 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1244 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1245 | |
1246 | /* TODO: merge event context. */ | |
1247 | } | |
de713d8a | 1248 | end: |
e58095ef MD |
1249 | return 0; |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Called at library load: connect the probe on all enablers matching | |
1254 | * this event. | |
5f733922 | 1255 | * Called with session mutex held. |
e58095ef | 1256 | */ |
5f733922 | 1257 | int lttng_fix_pending_events(void) |
e58095ef | 1258 | { |
bdb12629 | 1259 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1260 | |
bdb12629 MD |
1261 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1262 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1263 | } |
e58095ef MD |
1264 | return 0; |
1265 | } | |
1266 | ||
d8d2416d FD |
1267 | int lttng_fix_pending_event_notifiers(void) |
1268 | { | |
1269 | struct lttng_event_notifier_group *event_notifier_group; | |
1270 | ||
1271 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1272 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1273 | } | |
1274 | return 0; | |
1275 | } | |
1276 | ||
246be17e | 1277 | /* |
37dddb65 MD |
1278 | * For each session of the owner thread, execute pending statedump. |
1279 | * Only dump state for the sessions owned by the caller thread, because | |
1280 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1281 | */ |
3327ac33 | 1282 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1283 | { |
bdb12629 | 1284 | struct lttng_ust_session_private *session_priv; |
246be17e | 1285 | |
37dddb65 | 1286 | /* Execute state dump */ |
cf73e0fe | 1287 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1288 | |
1289 | /* Clear pending state dump */ | |
3327ac33 MD |
1290 | if (ust_lock()) { |
1291 | goto end; | |
1292 | } | |
bdb12629 MD |
1293 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1294 | if (session_priv->owner != owner) | |
37dddb65 | 1295 | continue; |
bdb12629 | 1296 | if (!session_priv->statedump_pending) |
37dddb65 | 1297 | continue; |
bdb12629 | 1298 | session_priv->statedump_pending = 0; |
246be17e | 1299 | } |
3327ac33 | 1300 | end: |
37dddb65 | 1301 | ust_unlock(); |
3327ac33 | 1302 | return; |
246be17e PW |
1303 | } |
1304 | ||
e58095ef | 1305 | static |
ba99fbe2 | 1306 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1307 | { |
1308 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1309 | ||
ba99fbe2 | 1310 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1311 | /* Free event enabler refs */ |
1312 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1313 | &event->priv->enablers_ref_head, node) |
e58095ef | 1314 | free(enabler_ref); |
ba99fbe2 MD |
1315 | |
1316 | switch (event->type) { | |
1317 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1318 | { | |
1319 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1320 | ||
1321 | /* Remove from event list. */ | |
1322 | cds_list_del(&event_recorder->priv->node); | |
1323 | /* Remove from event hash table. */ | |
1324 | cds_hlist_del(&event_recorder->priv->hlist); | |
1325 | ||
a40b5b8c | 1326 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1327 | free(event_recorder->parent); |
1328 | free(event_recorder->priv); | |
1329 | free(event_recorder); | |
1330 | break; | |
1331 | } | |
1332 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1333 | { | |
1334 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1335 | ||
1336 | /* Remove from event list. */ | |
1337 | cds_list_del(&event_notifier->priv->node); | |
1338 | /* Remove from event hash table. */ | |
1339 | cds_hlist_del(&event_notifier->priv->hlist); | |
1340 | ||
1341 | free(event_notifier->priv); | |
1342 | free(event_notifier->parent); | |
1343 | free(event_notifier); | |
1344 | break; | |
1345 | } | |
1346 | default: | |
1347 | abort(); | |
1348 | } | |
8020ceb5 MD |
1349 | } |
1350 | ||
c785c634 MD |
1351 | static |
1352 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1353 | { | |
1354 | cds_list_del(&_enum->node); | |
35ac38cb | 1355 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1356 | free(_enum); |
1357 | } | |
1358 | ||
fd17d7ce | 1359 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1360 | { |
bdb12629 | 1361 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1362 | |
bdb12629 MD |
1363 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1364 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1365 | } |
457a6b58 | 1366 | |
e58095ef MD |
1367 | /* |
1368 | * Enabler management. | |
1369 | */ | |
d871c65b FD |
1370 | struct lttng_event_enabler *lttng_event_enabler_create( |
1371 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1372 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1373 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1374 | { |
d871c65b | 1375 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1376 | |
d871c65b FD |
1377 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1378 | if (!event_enabler) | |
e58095ef | 1379 | return NULL; |
d871c65b FD |
1380 | event_enabler->base.format_type = format_type; |
1381 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1382 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1383 | memcpy(&event_enabler->base.event_param, event_param, | |
1384 | sizeof(event_enabler->base.event_param)); | |
1385 | event_enabler->chan = chan; | |
e58095ef | 1386 | /* ctx left NULL */ |
d871c65b | 1387 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1388 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1389 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1390 | |
1391 | return event_enabler; | |
457a6b58 MD |
1392 | } |
1393 | ||
d8d2416d FD |
1394 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1395 | struct lttng_event_notifier_group *event_notifier_group, | |
1396 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1397 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1398 | { |
1399 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1400 | ||
1401 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1402 | if (!event_notifier_enabler) | |
1403 | return NULL; | |
1404 | event_notifier_enabler->base.format_type = format_type; | |
1405 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1406 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1407 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1408 | ||
1409 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1410 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1411 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1412 | |
1413 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1414 | event_notifier_param->event.name, | |
1415 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1416 | event_notifier_enabler->base.event_param.instrumentation = | |
1417 | event_notifier_param->event.instrumentation; | |
1418 | event_notifier_enabler->base.event_param.loglevel = | |
1419 | event_notifier_param->event.loglevel; | |
1420 | event_notifier_enabler->base.event_param.loglevel_type = | |
1421 | event_notifier_param->event.loglevel_type; | |
1422 | ||
1423 | event_notifier_enabler->base.enabled = 0; | |
1424 | event_notifier_enabler->group = event_notifier_group; | |
1425 | ||
1426 | cds_list_add(&event_notifier_enabler->node, | |
1427 | &event_notifier_group->enablers_head); | |
1428 | ||
1429 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1430 | ||
1431 | return event_notifier_enabler; | |
1432 | } | |
1433 | ||
d871c65b | 1434 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1435 | { |
d871c65b | 1436 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1437 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1438 | |
e58095ef | 1439 | return 0; |
457a6b58 | 1440 | } |
457a6b58 | 1441 | |
d871c65b | 1442 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1443 | { |
d871c65b | 1444 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1445 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1446 | |
e58095ef MD |
1447 | return 0; |
1448 | } | |
457a6b58 | 1449 | |
d871c65b | 1450 | static |
a56fd376 | 1451 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1452 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1453 | { |
ab89263e MD |
1454 | (*bytecode)->enabler = enabler; |
1455 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1456 | /* Take ownership of bytecode */ | |
1457 | *bytecode = NULL; | |
d871c65b FD |
1458 | } |
1459 | ||
a56fd376 | 1460 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1461 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1462 | { |
a56fd376 | 1463 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1464 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1465 | ||
e7bc0ef6 | 1466 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1467 | return 0; |
0bfb5cbd JI |
1468 | } |
1469 | ||
d871c65b FD |
1470 | static |
1471 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1472 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1473 | { |
e9fe6aad MD |
1474 | (*excluder)->enabler = enabler; |
1475 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1476 | /* Take ownership of excluder */ | |
1477 | *excluder = NULL; | |
d871c65b FD |
1478 | } |
1479 | ||
1480 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1481 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1482 | { |
1483 | _lttng_enabler_attach_exclusion( | |
1484 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1485 | ||
e7bc0ef6 | 1486 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1487 | return 0; |
e58095ef | 1488 | } |
f488575f | 1489 | |
d8d2416d FD |
1490 | int lttng_event_notifier_enabler_enable( |
1491 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1492 | { | |
1493 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1494 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1495 | ||
1496 | return 0; | |
1497 | } | |
1498 | ||
1499 | int lttng_event_notifier_enabler_disable( | |
1500 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1501 | { | |
1502 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1503 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
a56fd376 | 1508 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1509 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1510 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1511 | { |
a56fd376 | 1512 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1513 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1514 | bytecode); | |
1515 | ||
1516 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1517 | return 0; | |
1518 | } | |
1519 | ||
d37ecb3f FD |
1520 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1521 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1522 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1523 | { |
49cde654 | 1524 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1525 | event_notifier_enabler); |
49cde654 | 1526 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1527 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1528 | /* Take ownership of bytecode */ |
1529 | *bytecode = NULL; | |
d37ecb3f FD |
1530 | event_notifier_enabler->num_captures++; |
1531 | ||
1532 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1533 | return 0; | |
1534 | } | |
1535 | ||
d8d2416d FD |
1536 | int lttng_event_notifier_enabler_attach_exclusion( |
1537 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1538 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1539 | { |
1540 | _lttng_enabler_attach_exclusion( | |
1541 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1542 | excluder); | |
1543 | ||
1544 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1545 | return 0; | |
1546 | } | |
1547 | ||
fd17d7ce MD |
1548 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1549 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1550 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1551 | { |
457a6b58 | 1552 | /* |
e58095ef MD |
1553 | * We cannot attach a context after trace has been started for a |
1554 | * session because the metadata does not allow expressing this | |
1555 | * information outside of the original channel scope. | |
457a6b58 | 1556 | */ |
bdb12629 | 1557 | if (session->priv->been_active) |
e58095ef | 1558 | return -EPERM; |
457a6b58 | 1559 | |
e58095ef | 1560 | switch (context_param->ctx) { |
fd17d7ce | 1561 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1562 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1563 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1564 | { |
fd17d7ce | 1565 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1566 | |
1567 | perf_ctx_param = &context_param->u.perf_counter; | |
1568 | return lttng_add_perf_counter_to_ctx( | |
1569 | perf_ctx_param->type, | |
1570 | perf_ctx_param->config, | |
1571 | perf_ctx_param->name, | |
1572 | ctx); | |
1573 | } | |
fd17d7ce | 1574 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1575 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1576 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1577 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1578 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1579 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1580 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1581 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1582 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1583 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1584 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1585 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1586 | ctx); | |
fd17d7ce | 1587 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1588 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1589 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1590 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1591 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1592 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1593 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1594 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1595 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1596 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1597 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1598 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1599 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1600 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1601 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1602 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1603 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1604 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1605 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1606 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1607 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1608 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1609 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1610 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1611 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1612 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1613 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1614 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1615 | default: |
1616 | return -EINVAL; | |
457a6b58 | 1617 | } |
457a6b58 MD |
1618 | } |
1619 | ||
d871c65b | 1620 | int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler, |
fd17d7ce | 1621 | struct lttng_ust_abi_context *context_param) |
457a6b58 | 1622 | { |
e58095ef | 1623 | return -ENOSYS; |
457a6b58 MD |
1624 | } |
1625 | ||
d871c65b | 1626 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1627 | { |
d871c65b FD |
1628 | if (!event_enabler) { |
1629 | return; | |
0f63324a | 1630 | } |
d871c65b | 1631 | cds_list_del(&event_enabler->node); |
0f63324a | 1632 | |
d871c65b | 1633 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1634 | |
d871c65b FD |
1635 | lttng_destroy_context(event_enabler->ctx); |
1636 | free(event_enabler); | |
457a6b58 MD |
1637 | } |
1638 | ||
e58095ef | 1639 | /* |
d871c65b | 1640 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1641 | * session. |
1642 | */ | |
457a6b58 | 1643 | static |
f69fe5fb | 1644 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1645 | { |
d871c65b | 1646 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1647 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1648 | |
bdb12629 | 1649 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1650 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1651 | /* |
1652 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1653 | * and its channel and session transient states are enabled, we |
1654 | * enable the event, else we disable it. | |
e58095ef | 1655 | */ |
2e70391c | 1656 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1657 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1658 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1659 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1660 | int nr_filters = 0; | |
e58095ef MD |
1661 | |
1662 | /* Enable events */ | |
1663 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1664 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1665 | if (enabler_ref->ref->enabled) { |
1666 | enabled = 1; | |
1667 | break; | |
1668 | } | |
1669 | } | |
ac6b4ac6 MD |
1670 | /* |
1671 | * Enabled state is based on union of enablers, with | |
1672 | * intesection of session and channel transient enable | |
1673 | * states. | |
1674 | */ | |
e7bc0ef6 | 1675 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1676 | |
2e70391c | 1677 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1678 | /* |
1679 | * Sync tracepoint registration with event enabled | |
1680 | * state. | |
1681 | */ | |
1682 | if (enabled) { | |
2e70391c | 1683 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1684 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1685 | } else { |
2e70391c | 1686 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1687 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1688 | } |
457a6b58 | 1689 | |
1f49fc05 | 1690 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1691 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1692 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1693 | if (enabler_ref->ref->enabled |
1694 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1695 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1696 | break; |
1697 | } | |
1698 | } | |
a2e4d05e MD |
1699 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1700 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1701 | |
e58095ef MD |
1702 | /* Enable filters */ |
1703 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1704 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1705 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1706 | nr_filters++; |
457a6b58 | 1707 | } |
a2e4d05e MD |
1708 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1709 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1710 | } |
d10a2205 | 1711 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1712 | } |
1713 | ||
4296085e MD |
1714 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1715 | static | |
dc11f93f | 1716 | bool lttng_ust_probe_supports_event_notifier(struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1717 | { |
1718 | return probe_desc->major >= 2; | |
1719 | } | |
1720 | ||
d8d2416d FD |
1721 | static |
1722 | void lttng_create_event_notifier_if_missing( | |
1723 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1724 | { | |
1725 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
dc11f93f | 1726 | struct lttng_ust_probe_desc *probe_desc; |
d8d2416d FD |
1727 | struct cds_list_head *probe_list; |
1728 | int i; | |
1729 | ||
1730 | probe_list = lttng_get_probe_list_head(); | |
1731 | ||
1732 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1733 | for (i = 0; i < probe_desc->nr_events; i++) { | |
1734 | int ret; | |
1735 | bool found = false; | |
a084756d | 1736 | struct lttng_ust_event_desc *desc; |
115db533 | 1737 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1738 | struct cds_hlist_head *head; |
1739 | struct cds_hlist_node *node; | |
1740 | ||
1741 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1742 | |
d8d2416d FD |
1743 | if (!lttng_desc_match_enabler(desc, |
1744 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1745 | continue; | |
1746 | ||
1747 | /* | |
1748 | * Given the current event_notifier group, get the bucket that | |
1749 | * the target event_notifier would be if it was already | |
1750 | * created. | |
1751 | */ | |
1752 | head = borrow_hash_table_bucket( | |
1753 | event_notifier_group->event_notifiers_ht.table, | |
1754 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1755 | ||
115db533 | 1756 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1757 | /* |
1758 | * Check if event_notifier already exists by checking | |
1759 | * if the event_notifier and enabler share the same | |
1760 | * description and id. | |
1761 | */ | |
115db533 MD |
1762 | if (event_notifier_priv->parent.desc == desc && |
1763 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1764 | found = true; |
1765 | break; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | if (found) | |
1770 | continue; | |
1771 | ||
4296085e MD |
1772 | /* Check that the probe supports event notifiers, else report the error. */ |
1773 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
1774 | ERR("Probe \"%s\" contains event \"%s\" which matches an enabled event notifier, " | |
1775 | "but its version (%u.%u) is too old and does not implement event notifiers. " | |
1776 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1777 | "this event will not generate any notification.", | |
1778 | probe_desc->provider, | |
1779 | desc->name, | |
1780 | probe_desc->major, | |
1781 | probe_desc->minor); | |
1782 | continue; | |
1783 | } | |
d8d2416d FD |
1784 | /* |
1785 | * We need to create a event_notifier for this event probe. | |
1786 | */ | |
1787 | ret = lttng_event_notifier_create(desc, | |
1788 | event_notifier_enabler->user_token, | |
6566528b | 1789 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1790 | event_notifier_group); |
1791 | if (ret) { | |
1792 | DBG("Unable to create event_notifier %s, error %d\n", | |
1793 | probe_desc->event_desc[i]->name, ret); | |
1794 | } | |
1795 | } | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1801 | */ | |
1802 | static | |
1803 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1804 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1805 | { | |
1806 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1807 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1808 | |
1809 | /* | |
1810 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1811 | * might still be attaching filter or exclusion to the | |
1812 | * event_notifier_enabler. | |
1813 | */ | |
1814 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1815 | goto end; | |
1816 | ||
1817 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1818 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1819 | ||
1820 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1821 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1822 | struct lttng_enabler_ref *enabler_ref; |
1823 | ||
115db533 | 1824 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1825 | continue; |
1826 | ||
115db533 | 1827 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1828 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1829 | if (!enabler_ref) { | |
1830 | /* | |
1831 | * If no backward ref, create it. | |
1832 | * Add backward ref from event_notifier to enabler. | |
1833 | */ | |
1834 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1835 | if (!enabler_ref) | |
1836 | return -ENOMEM; | |
1837 | ||
1838 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1839 | event_notifier_enabler); | |
1840 | cds_list_add(&enabler_ref->node, | |
115db533 | 1841 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1842 | } |
1843 | ||
1844 | /* | |
1845 | * Link filter bytecodes if not linked yet. | |
1846 | */ | |
115db533 | 1847 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1848 | &event_notifier_group->ctx, |
a2e4d05e | 1849 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1850 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1851 | |
1852 | /* | |
1853 | * Link capture bytecodes if not linked yet. | |
1854 | */ | |
115db533 | 1855 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1856 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1857 | &event_notifier_enabler->capture_bytecode_head); |
1858 | ||
115db533 | 1859 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1860 | } |
1861 | end: | |
1862 | return 0; | |
1863 | } | |
1864 | ||
1865 | static | |
1866 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1867 | { | |
1868 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1869 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1870 | |
1871 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1872 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1873 | ||
1874 | /* | |
1875 | * For each event_notifier, if at least one of its enablers is enabled, | |
1876 | * we enable the event_notifier, else we disable it. | |
1877 | */ | |
115db533 | 1878 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1879 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1880 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1881 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1882 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1883 | |
1884 | /* Enable event_notifiers */ | |
1885 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1886 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1887 | if (enabler_ref->ref->enabled) { |
1888 | enabled = 1; | |
1889 | break; | |
1890 | } | |
1891 | } | |
1892 | ||
115db533 | 1893 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1894 | /* |
1895 | * Sync tracepoint registration with event_notifier enabled | |
1896 | * state. | |
1897 | */ | |
1898 | if (enabled) { | |
115db533 | 1899 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1900 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1901 | } else { |
115db533 | 1902 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1903 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1904 | } |
1905 | ||
1906 | /* Check if has enablers without bytecode enabled */ | |
1907 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1908 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1909 | if (enabler_ref->ref->enabled |
1910 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1911 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1912 | break; |
1913 | } | |
1914 | } | |
a2e4d05e MD |
1915 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1916 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1917 | |
1918 | /* Enable filters */ | |
1919 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1920 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1921 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1922 | nr_filters++; |
d8d2416d | 1923 | } |
a2e4d05e MD |
1924 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1925 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1926 | |
1927 | /* Enable captures. */ | |
1928 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1929 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1930 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1931 | nr_captures++; |
d37ecb3f | 1932 | } |
a2e4d05e MD |
1933 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1934 | !!nr_captures); | |
d8d2416d | 1935 | } |
d10a2205 | 1936 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1937 | } |
1938 | ||
e58095ef MD |
1939 | /* |
1940 | * Apply enablers to session events, adding events to session if need | |
1941 | * be. It is required after each modification applied to an active | |
1942 | * session, and right before session "start". | |
1943 | * "lazy" sync means we only sync if required. | |
1944 | */ | |
1945 | static | |
f69fe5fb | 1946 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1947 | { |
e58095ef MD |
1948 | /* We can skip if session is not active */ |
1949 | if (!session->active) | |
1950 | return; | |
d871c65b | 1951 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1952 | } |
53569322 MD |
1953 | |
1954 | /* | |
1955 | * Update all sessions with the given app context. | |
1956 | * Called with ust lock held. | |
1957 | * This is invoked when an application context gets loaded/unloaded. It | |
1958 | * ensures the context callbacks are in sync with the application | |
1959 | * context (either app context callbacks, or dummy callbacks). | |
1960 | */ | |
1961 | void lttng_ust_context_set_session_provider(const char *name, | |
daacdbfc MD |
1962 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1963 | void (*record)(struct lttng_ust_ctx_field *field, | |
53569322 | 1964 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 1965 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
1966 | void (*get_value)(struct lttng_ust_ctx_field *field, |
1967 | struct lttng_ust_ctx_value *value)) | |
53569322 | 1968 | { |
bdb12629 | 1969 | struct lttng_ust_session_private *session_priv; |
53569322 | 1970 | |
bdb12629 | 1971 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 1972 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 1973 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
1974 | int ret; |
1975 | ||
bdb12629 | 1976 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
53569322 MD |
1977 | name, get_size, record, get_value); |
1978 | if (ret) | |
1979 | abort(); | |
bdb12629 | 1980 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 1981 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
53569322 MD |
1982 | name, get_size, record, get_value); |
1983 | if (ret) | |
1984 | abort(); | |
1985 | } | |
2e70391c | 1986 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 1987 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
53569322 MD |
1988 | name, get_size, record, get_value); |
1989 | if (ret) | |
1990 | abort(); | |
1991 | } | |
1992 | } | |
1993 | } | |
d8d2416d FD |
1994 | |
1995 | /* | |
1996 | * Update all event_notifier groups with the given app context. | |
1997 | * Called with ust lock held. | |
1998 | * This is invoked when an application context gets loaded/unloaded. It | |
1999 | * ensures the context callbacks are in sync with the application | |
2000 | * context (either app context callbacks, or dummy callbacks). | |
2001 | */ | |
2002 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
daacdbfc MD |
2003 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
2004 | void (*record)(struct lttng_ust_ctx_field *field, | |
d8d2416d | 2005 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2006 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
2007 | void (*get_value)(struct lttng_ust_ctx_field *field, |
2008 | struct lttng_ust_ctx_value *value)) | |
d8d2416d FD |
2009 | { |
2010 | struct lttng_event_notifier_group *event_notifier_group; | |
2011 | ||
2012 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2013 | int ret; | |
2014 | ||
2015 | ret = lttng_ust_context_set_provider_rcu( | |
2016 | &event_notifier_group->ctx, | |
2017 | name, get_size, record, get_value); | |
2018 | if (ret) | |
2019 | abort(); | |
2020 | } | |
2021 | } | |
9daacd1a MD |
2022 | |
2023 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2024 | unsigned char *uuid) | |
2025 | { | |
2026 | if (!session) | |
2027 | return 0; | |
2028 | /* Compare UUID with session. */ | |
2029 | if (session->priv->uuid_set) { | |
2030 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2031 | return -1; | |
2032 | } | |
2033 | } else { | |
2034 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2035 | session->priv->uuid_set = true; | |
2036 | } | |
2037 | return 0; | |
2038 | ||
2039 | } |