Commit | Line | Data |
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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8020ceb5 | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * Holds LTTng per-session event registry. |
8020ceb5 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b5234c06 | 10 | #include <stdio.h> |
d8d2416d | 11 | #include <assert.h> |
b5234c06 | 12 | #include <errno.h> |
d8d2416d FD |
13 | #include <limits.h> |
14 | #include <pthread.h> | |
f4681817 MD |
15 | #include <sys/shm.h> |
16 | #include <sys/ipc.h> | |
44c72f10 MD |
17 | #include <stdint.h> |
18 | #include <stddef.h> | |
28b12049 MD |
19 | #include <inttypes.h> |
20 | #include <time.h> | |
196ec2df | 21 | #include <stdbool.h> |
d8d2416d | 22 | #include <unistd.h> |
10544ee8 | 23 | #include <dlfcn.h> |
2ae57758 | 24 | #include <lttng/ust-endian.h> |
44c72f10 | 25 | |
d8d2416d | 26 | #include <urcu/arch.h> |
44c72f10 | 27 | #include <urcu/compiler.h> |
d8d2416d FD |
28 | #include <urcu/hlist.h> |
29 | #include <urcu/list.h> | |
44c72f10 | 30 | #include <urcu/uatomic.h> |
44c72f10 MD |
31 | |
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 | 34 | |
9d315d6d MJ |
35 | #include "common/logging.h" |
36 | #include "common/macros.h" | |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
38 | #include "common/ustcomm.h" |
39 | #include "common/ust-fd.h" | |
40 | #include "common/dynamic-type.h" | |
41 | #include "common/ust-context-provider.h" | |
1f18504e | 42 | #include "error.h" |
eda498b8 | 43 | #include "lttng-ust-uuid.h" |
44c72f10 | 44 | |
457a6b58 | 45 | #include "tracepoint-internal.h" |
196ec2df | 46 | #include "string-utils.h" |
4d451c15 | 47 | #include "lttng-bytecode.h" |
7dd08bec MD |
48 | #include "lttng-tracer.h" |
49 | #include "lttng-tracer-core.h" | |
cf73e0fe | 50 | #include "lttng-ust-statedump.h" |
51f804ec | 51 | #include "context-internal.h" |
36c52fff | 52 | #include "lib/lttng-ust/events.h" |
b728d87e | 53 | #include "wait.h" |
e4db8f98 MJ |
54 | #include "common/ringbuffer/shm.h" |
55 | #include "common/ringbuffer/frontend_types.h" | |
56 | #include "common/ringbuffer/frontend.h" | |
cdff92e0 | 57 | #include "common/counter/counter.h" |
e58e5ad5 | 58 | #include "common/jhash.h" |
d8d2416d | 59 | #include <lttng/ust-abi.h> |
4b4a1337 | 60 | #include "context-provider-internal.h" |
8165c8da MD |
61 | |
62 | /* | |
3327ac33 MD |
63 | * All operations within this file are called by the communication |
64 | * thread, under ust_lock protection. | |
8165c8da | 65 | */ |
8165c8da | 66 | |
b5234c06 | 67 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 68 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 69 | |
7753d283 | 70 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
71 | { |
72 | return &sessions; | |
73 | } | |
74 | ||
ba99fbe2 | 75 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 76 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 77 | |
e58095ef | 78 | static |
f69fe5fb | 79 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 80 | static |
f69fe5fb | 81 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 82 | static |
d8d2416d FD |
83 | void lttng_event_notifier_group_sync_enablers( |
84 | struct lttng_event_notifier_group *event_notifier_group); | |
85 | static | |
e58095ef MD |
86 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
87 | ||
5b4c6da4 MD |
88 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
89 | { | |
90 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
91 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
92 | return false; | |
93 | return true; | |
94 | } | |
95 | ||
96 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
97 | char *name) | |
98 | { | |
99 | strcpy(name, desc->probe_desc->provider_name); | |
100 | strcat(name, ":"); | |
101 | strcat(name, desc->event_name); | |
102 | } | |
103 | ||
6715d7d1 MD |
104 | /* |
105 | * Called with ust lock held. | |
106 | */ | |
107 | int lttng_session_active(void) | |
108 | { | |
bdb12629 | 109 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
110 | |
111 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 112 | if (iter->pub->active) |
6715d7d1 MD |
113 | return 1; |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
e58095ef MD |
118 | static |
119 | int lttng_loglevel_match(int loglevel, | |
120 | unsigned int has_loglevel, | |
fd17d7ce | 121 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
122 | int req_loglevel) |
123 | { | |
e58095ef MD |
124 | if (!has_loglevel) |
125 | loglevel = TRACE_DEFAULT; | |
457a6b58 | 126 | switch (req_type) { |
fd17d7ce | 127 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 128 | if (loglevel <= req_loglevel |
67ada458 | 129 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
130 | return 1; |
131 | else | |
132 | return 0; | |
fd17d7ce | 133 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 134 | if (loglevel == req_loglevel |
67ada458 | 135 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
136 | return 1; |
137 | else | |
138 | return 0; | |
fd17d7ce | 139 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 140 | default: |
67ada458 | 141 | if (loglevel <= TRACE_DEBUG) |
aacb3774 MD |
142 | return 1; |
143 | else | |
144 | return 0; | |
457a6b58 MD |
145 | } |
146 | } | |
147 | ||
f69fe5fb | 148 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 149 | { |
f69fe5fb | 150 | struct lttng_ust_session *session; |
bdb12629 | 151 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 152 | int i; |
8020ceb5 | 153 | |
f69fe5fb | 154 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
155 | if (!session) |
156 | return NULL; | |
f69fe5fb | 157 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
158 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
159 | if (!session_priv) { | |
53569322 MD |
160 | free(session); |
161 | return NULL; | |
162 | } | |
bdb12629 MD |
163 | session->priv = session_priv; |
164 | session_priv->pub = session; | |
165 | if (lttng_context_init_all(&session->priv->ctx)) { | |
166 | free(session_priv); | |
167 | free(session); | |
168 | return NULL; | |
169 | } | |
170 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
171 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
172 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
173 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 174 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 175 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 176 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
177 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
178 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
179 | return session; |
180 | } | |
181 | ||
ebabbf58 MD |
182 | struct lttng_counter *lttng_ust_counter_create( |
183 | const char *counter_transport_name, | |
184 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
185 | { | |
186 | struct lttng_counter_transport *counter_transport = NULL; | |
187 | struct lttng_counter *counter = NULL; | |
188 | ||
189 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
190 | if (!counter_transport) | |
191 | goto notransport; | |
192 | counter = zmalloc(sizeof(struct lttng_counter)); | |
193 | if (!counter) | |
194 | goto nomem; | |
195 | ||
196 | counter->ops = &counter_transport->ops; | |
197 | counter->transport = counter_transport; | |
198 | ||
199 | counter->counter = counter->ops->counter_create( | |
200 | number_dimensions, dimensions, 0, | |
201 | -1, 0, NULL, false); | |
202 | if (!counter->counter) { | |
203 | goto create_error; | |
204 | } | |
205 | ||
206 | return counter; | |
207 | ||
208 | create_error: | |
209 | free(counter); | |
210 | nomem: | |
211 | notransport: | |
212 | return NULL; | |
213 | } | |
214 | ||
215 | static | |
216 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
217 | { | |
218 | counter->ops->counter_destroy(counter->counter); | |
219 | free(counter); | |
220 | } | |
221 | ||
d8d2416d FD |
222 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
223 | { | |
224 | struct lttng_event_notifier_group *event_notifier_group; | |
225 | int i; | |
226 | ||
227 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
228 | if (!event_notifier_group) | |
229 | return NULL; | |
230 | ||
51f804ec FD |
231 | /* Add all contexts. */ |
232 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
233 | free(event_notifier_group); | |
234 | return NULL; | |
235 | } | |
236 | ||
d8d2416d FD |
237 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
238 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
239 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
240 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
241 | ||
242 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
243 | ||
244 | return event_notifier_group; | |
245 | } | |
246 | ||
74d81a6c MD |
247 | /* |
248 | * Only used internally at session destruction. | |
249 | */ | |
250 | static | |
e7bc0ef6 | 251 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 252 | { |
5198080d | 253 | struct lttng_ust_lib_ring_buffer_channel *chan; |
74d81a6c MD |
254 | struct lttng_ust_shm_handle *handle; |
255 | ||
e7bc0ef6 | 256 | cds_list_del(<tng_chan->priv->node); |
0950190a | 257 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 258 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 259 | handle = chan->handle; |
74d81a6c | 260 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
261 | free(lttng_chan->parent); |
262 | free(lttng_chan->priv); | |
f0fde1c3 | 263 | free(lttng_chan); |
74d81a6c MD |
264 | } |
265 | ||
ac6b4ac6 | 266 | static |
ba99fbe2 | 267 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
268 | { |
269 | int ret; | |
4e48b5d2 | 270 | const struct lttng_ust_event_desc *desc; |
5b4c6da4 | 271 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
ac6b4ac6 | 272 | |
ba99fbe2 MD |
273 | assert(event->priv->registered == 0); |
274 | desc = event->priv->desc; | |
5b4c6da4 MD |
275 | lttng_ust_format_event_name(desc, name); |
276 | ret = lttng_ust_tp_probe_register_queue_release(name, | |
ac6b4ac6 | 277 | desc->probe_callback, |
ba99fbe2 | 278 | event, desc->signature); |
ac6b4ac6 MD |
279 | WARN_ON_ONCE(ret); |
280 | if (!ret) | |
ba99fbe2 | 281 | event->priv->registered = 1; |
ac6b4ac6 MD |
282 | } |
283 | ||
d8d2416d | 284 | static |
ba99fbe2 | 285 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
286 | { |
287 | int ret; | |
4e48b5d2 | 288 | const struct lttng_ust_event_desc *desc; |
5b4c6da4 | 289 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
d8d2416d | 290 | |
ba99fbe2 MD |
291 | assert(event->priv->registered == 1); |
292 | desc = event->priv->desc; | |
5b4c6da4 MD |
293 | lttng_ust_format_event_name(desc, name); |
294 | ret = lttng_ust_tp_probe_unregister_queue_release(name, | |
ac6b4ac6 | 295 | desc->probe_callback, |
ba99fbe2 | 296 | event); |
ac6b4ac6 MD |
297 | WARN_ON_ONCE(ret); |
298 | if (!ret) | |
ba99fbe2 | 299 | event->priv->registered = 0; |
ac6b4ac6 MD |
300 | } |
301 | ||
d8d2416d | 302 | static |
ba99fbe2 | 303 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 304 | { |
ba99fbe2 MD |
305 | if (event->priv->registered) |
306 | unregister_event(event); | |
d8d2416d FD |
307 | } |
308 | ||
f69fe5fb | 309 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 310 | { |
e7bc0ef6 | 311 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 312 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 313 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 314 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 315 | |
b5234c06 | 316 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 317 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 318 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 319 | } |
b653ddc1 | 320 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 321 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 322 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 323 | &session->priv->enablers_head, node) |
d871c65b | 324 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 325 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 326 | &session->priv->events_head, node) |
ba99fbe2 | 327 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 328 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 329 | &session->priv->enums_head, node) |
c785c634 | 330 | _lttng_enum_destroy(_enum); |
bdb12629 | 331 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 332 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
333 | cds_list_del(&session->priv->node); |
334 | lttng_destroy_context(session->priv->ctx); | |
335 | free(session->priv); | |
b5234c06 | 336 | free(session); |
8020ceb5 MD |
337 | } |
338 | ||
d8d2416d FD |
339 | void lttng_event_notifier_group_destroy( |
340 | struct lttng_event_notifier_group *event_notifier_group) | |
341 | { | |
342 | int close_ret; | |
343 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 344 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
345 | |
346 | if (!event_notifier_group) { | |
347 | return; | |
348 | } | |
349 | ||
ba99fbe2 | 350 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 351 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 352 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 353 | |
b653ddc1 | 354 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
355 | |
356 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
357 | &event_notifier_group->enablers_head, node) | |
358 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
359 | ||
ba99fbe2 | 360 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 361 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 362 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 363 | |
ebabbf58 MD |
364 | if (event_notifier_group->error_counter) |
365 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
366 | ||
367 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
368 | |
369 | lttng_ust_lock_fd_tracker(); | |
370 | close_ret = close(event_notifier_group->notification_fd); | |
371 | if (!close_ret) { | |
372 | lttng_ust_delete_fd_from_tracker( | |
373 | event_notifier_group->notification_fd); | |
374 | } else { | |
375 | PERROR("close"); | |
376 | abort(); | |
377 | } | |
378 | lttng_ust_unlock_fd_tracker(); | |
379 | ||
380 | cds_list_del(&event_notifier_group->node); | |
bd515d28 | 381 | lttng_destroy_context(event_notifier_group->ctx); |
d8d2416d FD |
382 | free(event_notifier_group); |
383 | } | |
384 | ||
d871c65b FD |
385 | static |
386 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
387 | { | |
ab249ecf | 388 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
389 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
390 | ||
391 | if (!enabler) { | |
392 | return; | |
393 | } | |
394 | ||
395 | /* Destroy filter bytecode */ | |
396 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
397 | &enabler->filter_bytecode_head, node) { | |
398 | free(filter_node); | |
399 | } | |
400 | ||
401 | /* Destroy excluders */ | |
402 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
403 | &enabler->excluder_head, node) { | |
404 | free(excluder_node); | |
405 | } | |
406 | } | |
407 | ||
d8d2416d FD |
408 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
409 | { | |
410 | if (!event_notifier_enabler) { | |
411 | return; | |
412 | } | |
413 | ||
414 | cds_list_del(&event_notifier_enabler->node); | |
415 | ||
416 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
417 | ||
418 | free(event_notifier_enabler); | |
419 | } | |
420 | ||
53569322 | 421 | static |
4e48b5d2 | 422 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 423 | struct lttng_ust_session *session) |
53569322 MD |
424 | { |
425 | const char *enum_name = desc->name; | |
426 | struct lttng_enum *_enum; | |
427 | struct cds_hlist_head *head; | |
53569322 MD |
428 | int ret = 0; |
429 | size_t name_len = strlen(enum_name); | |
430 | uint32_t hash; | |
431 | int notify_socket; | |
432 | ||
b33b46f7 | 433 | /* Check if this enum is already registered for this session. */ |
53569322 | 434 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 435 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
436 | |
437 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
438 | if (_enum) { | |
439 | ret = -EEXIST; | |
440 | goto exist; | |
53569322 MD |
441 | } |
442 | ||
bdb12629 | 443 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
444 | if (notify_socket < 0) { |
445 | ret = notify_socket; | |
446 | goto socket_error; | |
447 | } | |
448 | ||
449 | _enum = zmalloc(sizeof(*_enum)); | |
450 | if (!_enum) { | |
451 | ret = -ENOMEM; | |
452 | goto cache_error; | |
453 | } | |
454 | _enum->session = session; | |
455 | _enum->desc = desc; | |
456 | ||
457 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 458 | session->priv->objd, |
53569322 MD |
459 | enum_name, |
460 | desc->nr_entries, | |
461 | desc->entries, | |
462 | &_enum->id); | |
463 | if (ret < 0) { | |
464 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
465 | goto sessiond_register_error; | |
466 | } | |
bdb12629 | 467 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
468 | cds_hlist_add_head(&_enum->hlist, head); |
469 | return 0; | |
470 | ||
471 | sessiond_register_error: | |
472 | free(_enum); | |
473 | cache_error: | |
474 | socket_error: | |
475 | exist: | |
476 | return ret; | |
477 | } | |
478 | ||
479 | static | |
4e48b5d2 | 480 | int lttng_create_enum_check(const struct lttng_ust_type_common *type, |
f69fe5fb | 481 | struct lttng_ust_session *session) |
53569322 | 482 | { |
a084756d MD |
483 | switch (type->type) { |
484 | case lttng_ust_type_enum: | |
218deb69 | 485 | { |
4e48b5d2 | 486 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
487 | int ret; |
488 | ||
a084756d | 489 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
490 | ret = lttng_enum_create(enum_desc, session); |
491 | if (ret && ret != -EEXIST) { | |
492 | DBG("Unable to create enum error: (%d)", ret); | |
493 | return ret; | |
494 | } | |
495 | break; | |
496 | } | |
a084756d | 497 | case lttng_ust_type_dynamic: |
53569322 | 498 | { |
4e48b5d2 MD |
499 | const struct lttng_ust_event_field *tag_field_generic; |
500 | const struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
501 | int ret; |
502 | ||
503 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 504 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
505 | ret = lttng_enum_create(enum_desc, session); |
506 | if (ret && ret != -EEXIST) { | |
507 | DBG("Unable to create enum error: (%d)", ret); | |
508 | return ret; | |
509 | } | |
510 | break; | |
511 | } | |
512 | default: | |
513 | /* TODO: nested types when they become supported. */ | |
514 | break; | |
515 | } | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static | |
520 | int lttng_create_all_event_enums(size_t nr_fields, | |
4e48b5d2 | 521 | const struct lttng_ust_event_field **event_fields, |
f69fe5fb | 522 | struct lttng_ust_session *session) |
53569322 MD |
523 | { |
524 | size_t i; | |
525 | int ret; | |
526 | ||
527 | /* For each field, ensure enum is part of the session. */ | |
528 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 529 | const struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
530 | |
531 | ret = lttng_create_enum_check(type, session); | |
532 | if (ret) | |
533 | return ret; | |
534 | } | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static | |
539 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
4e48b5d2 | 540 | struct lttng_ust_ctx_field *ctx_fields, |
f69fe5fb | 541 | struct lttng_ust_session *session) |
53569322 MD |
542 | { |
543 | size_t i; | |
544 | int ret; | |
545 | ||
546 | /* For each field, ensure enum is part of the session. */ | |
547 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 548 | const struct lttng_ust_type_common *type = ctx_fields[i].event_field->type; |
53569322 MD |
549 | |
550 | ret = lttng_create_enum_check(type, session); | |
551 | if (ret) | |
552 | return ret; | |
553 | } | |
554 | return 0; | |
555 | } | |
556 | ||
710b8ee3 MD |
557 | /* |
558 | * Ensure that a state-dump will be performed for this session at the end | |
559 | * of the current handle_message(). | |
560 | */ | |
f69fe5fb | 561 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 562 | { |
bdb12629 MD |
563 | session->priv->statedump_pending = 1; |
564 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
565 | return 0; |
566 | } | |
53569322 | 567 | |
f69fe5fb | 568 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
569 | { |
570 | int ret = 0; | |
e7bc0ef6 | 571 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 572 | int notify_socket; |
8020ceb5 | 573 | |
8020ceb5 MD |
574 | if (session->active) { |
575 | ret = -EBUSY; | |
576 | goto end; | |
577 | } | |
578 | ||
bdb12629 | 579 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
580 | if (notify_socket < 0) |
581 | return notify_socket; | |
582 | ||
ac6b4ac6 | 583 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 584 | session->priv->tstate = 1; |
e58095ef | 585 | |
3ff7660f | 586 | /* We need to sync enablers with session before activation. */ |
d871c65b | 587 | lttng_session_sync_event_enablers(session); |
3ff7660f | 588 | |
8020ceb5 MD |
589 | /* |
590 | * Snapshot the number of events per channel to know the type of header | |
591 | * we need to use. | |
592 | */ | |
bdb12629 | 593 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 594 | struct lttng_ust_ctx *ctx; |
4e48b5d2 | 595 | struct lttng_ust_ctx_field *fields = NULL; |
32ce8569 | 596 | size_t nr_fields = 0; |
6ca18e66 | 597 | uint32_t chan_id; |
32ce8569 MD |
598 | |
599 | /* don't change it if session stop/restart */ | |
8020ceb5 | 600 | if (chan->header_type) |
32ce8569 | 601 | continue; |
0950190a | 602 | ctx = chan->ctx; |
32ce8569 MD |
603 | if (ctx) { |
604 | nr_fields = ctx->nr_fields; | |
83e43212 | 605 | fields = ctx->fields; |
53569322 MD |
606 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
607 | session); | |
608 | if (ret < 0) { | |
609 | DBG("Error (%d) adding enum to session", ret); | |
610 | return ret; | |
611 | } | |
32ce8569 MD |
612 | } |
613 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 614 | session, |
bdb12629 | 615 | session->priv->objd, |
e7bc0ef6 | 616 | chan->parent.objd, |
32ce8569 MD |
617 | nr_fields, |
618 | fields, | |
6ca18e66 | 619 | &chan_id, |
32ce8569 | 620 | &chan->header_type); |
b869b5ae MD |
621 | if (ret) { |
622 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 623 | return ret; |
b869b5ae | 624 | } |
6ca18e66 MD |
625 | if (chan_id != chan->id) { |
626 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
627 | chan_id, chan->id); | |
628 | return -EINVAL; | |
629 | } | |
8020ceb5 MD |
630 | } |
631 | ||
ac6b4ac6 | 632 | /* Set atomically the state to "active" */ |
b5234c06 | 633 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 634 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 635 | |
710b8ee3 MD |
636 | ret = lttng_session_statedump(session); |
637 | if (ret) | |
638 | return ret; | |
8020ceb5 | 639 | end: |
8020ceb5 MD |
640 | return ret; |
641 | } | |
642 | ||
f69fe5fb | 643 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
644 | { |
645 | int ret = 0; | |
646 | ||
8020ceb5 MD |
647 | if (!session->active) { |
648 | ret = -EBUSY; | |
649 | goto end; | |
650 | } | |
ac6b4ac6 | 651 | /* Set atomically the state to "inactive" */ |
b5234c06 | 652 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
653 | |
654 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 655 | session->priv->tstate = 0; |
d871c65b | 656 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 657 | end: |
8020ceb5 MD |
658 | return ret; |
659 | } | |
660 | ||
e7bc0ef6 | 661 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 662 | { |
ac6b4ac6 | 663 | int ret = 0; |
976fe9ea | 664 | |
e7bc0ef6 | 665 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
666 | ret = -EBUSY; |
667 | goto end; | |
668 | } | |
669 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
670 | lttng_channel->priv->tstate = 1; |
671 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 672 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 673 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
674 | end: |
675 | return ret; | |
976fe9ea MD |
676 | } |
677 | ||
e7bc0ef6 | 678 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 679 | { |
ac6b4ac6 | 680 | int ret = 0; |
976fe9ea | 681 | |
e7bc0ef6 | 682 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
683 | ret = -EBUSY; |
684 | goto end; | |
685 | } | |
686 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 687 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 688 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
689 | lttng_channel->priv->tstate = 0; |
690 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
691 | end: |
692 | return ret; | |
976fe9ea MD |
693 | } |
694 | ||
fb470188 FD |
695 | static inline |
696 | struct cds_hlist_head *borrow_hash_table_bucket( | |
697 | struct cds_hlist_head *hash_table, | |
698 | unsigned int hash_table_size, | |
4e48b5d2 | 699 | const struct lttng_ust_event_desc *desc) |
fb470188 | 700 | { |
5b4c6da4 | 701 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
702 | size_t name_len; |
703 | uint32_t hash; | |
704 | ||
5b4c6da4 MD |
705 | lttng_ust_format_event_name(desc, name); |
706 | name_len = strlen(name); | |
fb470188 | 707 | |
5b4c6da4 | 708 | hash = jhash(name, name_len, 0); |
fb470188 FD |
709 | return &hash_table[hash & (hash_table_size - 1)]; |
710 | } | |
711 | ||
8020ceb5 MD |
712 | /* |
713 | * Supports event creation while tracing session is active. | |
714 | */ | |
e58095ef | 715 | static |
4e48b5d2 | 716 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 717 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 718 | { |
5b4c6da4 | 719 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
720 | struct lttng_ust_event_recorder *event_recorder; |
721 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 722 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 723 | struct cds_hlist_head *head; |
576599a0 | 724 | int ret = 0; |
32ce8569 MD |
725 | int notify_socket, loglevel; |
726 | const char *uri; | |
8020ceb5 | 727 | |
e7bc0ef6 | 728 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 729 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 730 | |
bdb12629 | 731 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
732 | if (notify_socket < 0) { |
733 | ret = notify_socket; | |
734 | goto socket_error; | |
735 | } | |
736 | ||
53569322 MD |
737 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
738 | session); | |
c785c634 MD |
739 | if (ret < 0) { |
740 | DBG("Error (%d) adding enum to session", ret); | |
741 | goto create_enum_error; | |
742 | } | |
743 | ||
457a6b58 MD |
744 | /* |
745 | * Check if loglevel match. Refuse to connect event if not. | |
746 | */ | |
2e70391c MD |
747 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
748 | if (!event_recorder) { | |
576599a0 | 749 | ret = -ENOMEM; |
8020ceb5 | 750 | goto cache_error; |
576599a0 | 751 | } |
2e70391c | 752 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 753 | |
7ee76145 | 754 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 755 | if (!event_recorder->parent) { |
80333dfa MD |
756 | ret = -ENOMEM; |
757 | goto parent_error; | |
758 | } | |
7ee76145 | 759 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 760 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 761 | event_recorder->parent->child = event_recorder; |
80333dfa | 762 | |
2e70391c MD |
763 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
764 | if (!event_recorder_priv) { | |
68bb7559 MD |
765 | ret = -ENOMEM; |
766 | goto priv_error; | |
767 | } | |
2e70391c MD |
768 | event_recorder->priv = event_recorder_priv; |
769 | event_recorder_priv->pub = event_recorder; | |
770 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
771 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 772 | |
2e70391c | 773 | event_recorder->chan = chan; |
e58095ef | 774 | |
ac6b4ac6 | 775 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 776 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
777 | event_recorder->parent->enabled = 0; |
778 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 779 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
780 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
781 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
782 | |
783 | if (desc->loglevel) | |
2e70391c | 784 | loglevel = *(*event_recorder->parent->priv->desc->loglevel); |
32ce8569 MD |
785 | else |
786 | loglevel = TRACE_DEFAULT; | |
dc11f93f MD |
787 | if (desc->model_emf_uri) |
788 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
789 | else |
790 | uri = NULL; | |
791 | ||
5b4c6da4 MD |
792 | lttng_ust_format_event_name(desc, name); |
793 | ||
13b21cd6 MD |
794 | /* Fetch event ID from sessiond */ |
795 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 796 | session, |
bdb12629 | 797 | session->priv->objd, |
e7bc0ef6 | 798 | chan->priv->parent.objd, |
5b4c6da4 | 799 | name, |
13b21cd6 MD |
800 | loglevel, |
801 | desc->signature, | |
802 | desc->nr_fields, | |
803 | desc->fields, | |
804 | uri, | |
8936b6c0 | 805 | &event_recorder->priv->id); |
13b21cd6 MD |
806 | if (ret < 0) { |
807 | DBG("Error (%d) registering event to sessiond", ret); | |
808 | goto sessiond_register_error; | |
32ce8569 | 809 | } |
2b213b16 | 810 | |
e7bc0ef6 | 811 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 812 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 813 | return 0; |
8020ceb5 | 814 | |
32ce8569 | 815 | sessiond_register_error: |
2e70391c | 816 | free(event_recorder_priv); |
68bb7559 | 817 | priv_error: |
2e70391c | 818 | free(event_recorder->parent); |
80333dfa | 819 | parent_error: |
2e70391c | 820 | free(event_recorder); |
8020ceb5 | 821 | cache_error: |
c785c634 | 822 | create_enum_error: |
32ce8569 | 823 | socket_error: |
576599a0 | 824 | return ret; |
8020ceb5 MD |
825 | } |
826 | ||
d8d2416d | 827 | static |
4e48b5d2 | 828 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 829 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
830 | struct lttng_event_notifier_group *event_notifier_group) |
831 | { | |
d7d45c0d | 832 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 833 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
834 | struct cds_hlist_head *head; |
835 | int ret = 0; | |
836 | ||
837 | /* | |
838 | * Get the hashtable bucket the created lttng_event_notifier object | |
839 | * should be inserted. | |
840 | */ | |
841 | head = borrow_hash_table_bucket( | |
842 | event_notifier_group->event_notifiers_ht.table, | |
843 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
844 | ||
d7d45c0d | 845 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
846 | if (!event_notifier) { |
847 | ret = -ENOMEM; | |
848 | goto error; | |
849 | } | |
d7d45c0d | 850 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 851 | |
115db533 MD |
852 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
853 | if (!event_notifier->parent) { | |
854 | ret = -ENOMEM; | |
855 | goto parent_error; | |
856 | } | |
857 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 858 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 859 | event_notifier->parent->child = event_notifier; |
115db533 MD |
860 | |
861 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
862 | if (!event_notifier_priv) { | |
863 | ret = -ENOMEM; | |
864 | goto priv_error; | |
865 | } | |
866 | event_notifier->priv = event_notifier_priv; | |
867 | event_notifier_priv->pub = event_notifier; | |
868 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
869 | event_notifier_priv->parent.pub = event_notifier->parent; | |
870 | ||
871 | event_notifier_priv->group = event_notifier_group; | |
872 | event_notifier_priv->parent.user_token = token; | |
873 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
874 | |
875 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 876 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
877 | event_notifier->parent->enabled = 0; |
878 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 879 | |
a2e4d05e MD |
880 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
881 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
882 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
883 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 884 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 885 | |
115db533 | 886 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 887 | &event_notifier_group->event_notifiers_head); |
115db533 | 888 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
889 | |
890 | return 0; | |
891 | ||
115db533 MD |
892 | priv_error: |
893 | free(event_notifier->parent); | |
894 | parent_error: | |
895 | free(event_notifier); | |
d8d2416d FD |
896 | error: |
897 | return ret; | |
898 | } | |
899 | ||
e58095ef | 900 | static |
4e48b5d2 | 901 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
902 | struct lttng_enabler *enabler) |
903 | { | |
5b4c6da4 | 904 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 905 | int loglevel = 0; |
7e2e405c | 906 | unsigned int has_loglevel = 0; |
e58095ef | 907 | |
5b4c6da4 | 908 | lttng_ust_format_event_name(desc, name); |
e450e339 | 909 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 910 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 911 | name, SIZE_MAX)) |
e58095ef MD |
912 | return 0; |
913 | if (desc->loglevel) { | |
914 | loglevel = *(*desc->loglevel); | |
915 | has_loglevel = 1; | |
916 | } | |
917 | if (!lttng_loglevel_match(loglevel, | |
918 | has_loglevel, | |
919 | enabler->event_param.loglevel_type, | |
920 | enabler->event_param.loglevel)) | |
921 | return 0; | |
922 | return 1; | |
923 | } | |
924 | ||
925 | static | |
4e48b5d2 | 926 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
927 | struct lttng_enabler *enabler) |
928 | { | |
5b4c6da4 | 929 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
930 | int loglevel = 0; |
931 | unsigned int has_loglevel = 0; | |
932 | ||
5b4c6da4 | 933 | lttng_ust_format_event_name(desc, name); |
e450e339 | 934 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 935 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
936 | return 0; |
937 | if (desc->loglevel) { | |
938 | loglevel = *(*desc->loglevel); | |
939 | has_loglevel = 1; | |
940 | } | |
941 | if (!lttng_loglevel_match(loglevel, | |
942 | has_loglevel, | |
943 | enabler->event_param.loglevel_type, | |
944 | enabler->event_param.loglevel)) | |
945 | return 0; | |
946 | return 1; | |
947 | } | |
948 | ||
949 | static | |
4e48b5d2 | 950 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
951 | struct lttng_enabler *enabler) |
952 | { | |
e450e339 FD |
953 | switch (enabler->format_type) { |
954 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
955 | { |
956 | struct lttng_ust_excluder_node *excluder; | |
957 | ||
958 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
959 | return 0; | |
960 | } | |
961 | ||
962 | /* | |
963 | * If the matching event matches with an excluder, | |
964 | * return 'does not match' | |
965 | */ | |
966 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
967 | int count; | |
968 | ||
969 | for (count = 0; count < excluder->excluder.count; count++) { | |
970 | int len; | |
971 | char *excluder_name; | |
972 | ||
973 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
974 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
975 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
976 | if (len > 0) { |
977 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
978 | ||
979 | lttng_ust_format_event_name(desc, name); | |
980 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
981 | return 0; | |
982 | } | |
983 | } | |
ed5b5bbd JI |
984 | } |
985 | } | |
196ec2df | 986 | return 1; |
ed5b5bbd | 987 | } |
e450e339 | 988 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
989 | return lttng_desc_match_event_enabler(desc, enabler); |
990 | default: | |
991 | return -EINVAL; | |
992 | } | |
993 | } | |
994 | ||
995 | static | |
d871c65b | 996 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 997 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 998 | { |
2e70391c | 999 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 1000 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 1001 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
1002 | return 1; |
1003 | else | |
1004 | return 0; | |
e58095ef MD |
1005 | } |
1006 | ||
d8d2416d FD |
1007 | static |
1008 | int lttng_event_notifier_enabler_match_event_notifier( | |
1009 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1010 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1011 | { |
115db533 | 1012 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1013 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1014 | ||
115db533 MD |
1015 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1016 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1017 | return 1; |
1018 | else | |
1019 | return 0; | |
1020 | } | |
1021 | ||
e58095ef | 1022 | static |
d871c65b FD |
1023 | struct lttng_enabler_ref *lttng_enabler_ref( |
1024 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1025 | struct lttng_enabler *enabler) |
1026 | { | |
1027 | struct lttng_enabler_ref *enabler_ref; | |
1028 | ||
d871c65b | 1029 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1030 | if (enabler_ref->ref == enabler) |
1031 | return enabler_ref; | |
1032 | } | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
8020ceb5 | 1036 | /* |
e58095ef MD |
1037 | * Create struct lttng_event if it is missing and present in the list of |
1038 | * tracepoint probes. | |
8020ceb5 | 1039 | */ |
e58095ef | 1040 | static |
ba99fbe2 | 1041 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1042 | { |
e7bc0ef6 | 1043 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
4e48b5d2 MD |
1044 | struct lttng_ust_registered_probe *reg_probe; |
1045 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1046 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1047 | int i; |
1048 | struct cds_list_head *probe_list; | |
1049 | ||
1050 | probe_list = lttng_get_probe_list_head(); | |
1051 | /* | |
1052 | * For each probe event, if we find that a probe event matches | |
1053 | * our enabler, create an associated lttng_event if not | |
1054 | * already present. | |
1055 | */ | |
4e48b5d2 MD |
1056 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1057 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1058 | ||
e58095ef | 1059 | for (i = 0; i < probe_desc->nr_events; i++) { |
98a97f24 FD |
1060 | int ret; |
1061 | bool found = false; | |
d56fa719 MD |
1062 | struct cds_hlist_head *head; |
1063 | struct cds_hlist_node *node; | |
e58095ef MD |
1064 | |
1065 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1066 | if (!lttng_desc_match_enabler(desc, |
1067 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1068 | continue; |
1069 | ||
fb470188 | 1070 | head = borrow_hash_table_bucket( |
bdb12629 | 1071 | session->priv->events_ht.table, |
fb470188 FD |
1072 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1073 | ||
2e70391c MD |
1074 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1075 | if (event_recorder_priv->parent.desc == desc | |
1076 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1077 | found = true; |
3140bffe FD |
1078 | break; |
1079 | } | |
e58095ef MD |
1080 | } |
1081 | if (found) | |
1082 | continue; | |
1083 | ||
1084 | /* | |
1085 | * We need to create an event for this | |
1086 | * event probe. | |
1087 | */ | |
2e70391c | 1088 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1089 | event_enabler->chan); |
e58095ef | 1090 | if (ret) { |
5b4c6da4 MD |
1091 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1092 | probe_desc->provider_name, | |
1093 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1094 | } |
8165c8da | 1095 | } |
8020ceb5 | 1096 | } |
8020ceb5 MD |
1097 | } |
1098 | ||
a44d07da | 1099 | static |
4e48b5d2 | 1100 | void probe_provider_event_for_each(const struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1101 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1102 | { |
1103 | struct cds_hlist_node *node, *tmp_node; | |
1104 | struct cds_list_head *sessionsp; | |
a44d07da | 1105 | unsigned int i; |
35ac38cb FD |
1106 | |
1107 | /* Get handle on list of sessions. */ | |
7753d283 | 1108 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1109 | |
1110 | /* | |
a44d07da FD |
1111 | * Iterate over all events in the probe provider descriptions and |
1112 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1113 | */ |
1114 | for (i = 0; i < provider_desc->nr_events; i++) { | |
4e48b5d2 | 1115 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1116 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1117 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1118 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1119 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1120 | struct cds_hlist_head *head; |
35ac38cb FD |
1121 | |
1122 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1123 | |
a44d07da FD |
1124 | /* |
1125 | * Iterate over all session to find the current event | |
1126 | * description. | |
1127 | */ | |
bdb12629 | 1128 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1129 | /* |
a44d07da FD |
1130 | * Get the list of events in the hashtable bucket and |
1131 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1132 | */ |
fb470188 | 1133 | head = borrow_hash_table_bucket( |
bdb12629 | 1134 | session_priv->events_ht.table, |
fb470188 FD |
1135 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1136 | ||
2e70391c MD |
1137 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1138 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1139 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1140 | break; |
1141 | } | |
1142 | } | |
1143 | } | |
d8d2416d FD |
1144 | |
1145 | /* | |
1146 | * Iterate over all event_notifier groups to find the current event | |
1147 | * description. | |
1148 | */ | |
1149 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1150 | /* | |
1151 | * Get the list of event_notifiers in the hashtable bucket and | |
1152 | * iterate to find the event_notifier matching this | |
1153 | * descriptor. | |
1154 | */ | |
1155 | head = borrow_hash_table_bucket( | |
1156 | event_notifier_group->event_notifiers_ht.table, | |
1157 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1158 | ||
115db533 MD |
1159 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1160 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1161 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1162 | break; |
1163 | } | |
1164 | } | |
1165 | } | |
35ac38cb | 1166 | } |
a44d07da FD |
1167 | } |
1168 | ||
1169 | static | |
ba99fbe2 | 1170 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1171 | { |
a44d07da | 1172 | |
ba99fbe2 MD |
1173 | switch (event->type) { |
1174 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1175 | { | |
1176 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1177 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1178 | unsigned int i; |
1179 | ||
1180 | /* Destroy enums of the current event. */ | |
1181 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
4e48b5d2 MD |
1182 | const struct lttng_ust_enum_desc *enum_desc; |
1183 | const struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1184 | struct lttng_enum *curr_enum; |
1185 | ||
25cff019 | 1186 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1187 | switch (field->type->type) { |
1188 | case lttng_ust_type_enum: | |
1189 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1190 | break; |
1191 | default: | |
1192 | continue; | |
1193 | } | |
a44d07da | 1194 | |
ba99fbe2 MD |
1195 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1196 | if (curr_enum) { | |
1197 | _lttng_enum_destroy(curr_enum); | |
1198 | } | |
a44d07da | 1199 | } |
ba99fbe2 MD |
1200 | break; |
1201 | } | |
1202 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1203 | break; | |
1204 | default: | |
1205 | abort(); | |
a44d07da | 1206 | } |
a44d07da | 1207 | /* Destroy event. */ |
ba99fbe2 | 1208 | _lttng_event_destroy(event); |
a44d07da FD |
1209 | } |
1210 | ||
1211 | /* | |
1212 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1213 | * the probe provider descriptor received as argument. Must me called with the | |
1214 | * ust_lock held. | |
1215 | */ | |
1216 | void lttng_probe_provider_unregister_events( | |
4e48b5d2 | 1217 | const struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1218 | { |
1219 | /* | |
1220 | * Iterate over all events in the probe provider descriptions and sessions | |
1221 | * to queue the unregistration of the events. | |
1222 | */ | |
ba99fbe2 | 1223 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1224 | |
1225 | /* Wait for grace period. */ | |
b653ddc1 | 1226 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1227 | /* Prune the unregistration queue. */ |
d10a2205 | 1228 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1229 | |
1230 | /* | |
1231 | * It is now safe to destroy the events and remove them from the event list | |
1232 | * and hashtables. | |
1233 | */ | |
ba99fbe2 | 1234 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1235 | } |
1236 | ||
8020ceb5 | 1237 | /* |
d8d2416d | 1238 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1239 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1240 | */ |
1241 | static | |
ba99fbe2 | 1242 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1243 | { |
e7bc0ef6 | 1244 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1245 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1246 | |
d871c65b | 1247 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1248 | goto end; |
1249 | ||
e58095ef | 1250 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1251 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1252 | |
1253 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1254 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1255 | struct lttng_enabler_ref *enabler_ref; |
1256 | ||
2e70391c | 1257 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1258 | continue; |
1259 | ||
2e70391c | 1260 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1261 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1262 | if (!enabler_ref) { |
1263 | /* | |
1264 | * If no backward ref, create it. | |
1265 | * Add backward ref from event to enabler. | |
1266 | */ | |
1267 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1268 | if (!enabler_ref) | |
1269 | return -ENOMEM; | |
d871c65b FD |
1270 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1271 | event_enabler); | |
e58095ef | 1272 | cds_list_add(&enabler_ref->node, |
2e70391c | 1273 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1274 | } |
e58095ef MD |
1275 | |
1276 | /* | |
1277 | * Link filter bytecodes if not linked yet. | |
1278 | */ | |
2e70391c | 1279 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1280 | &session->priv->ctx, |
a2e4d05e | 1281 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1282 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1283 | |
1284 | /* TODO: merge event context. */ | |
1285 | } | |
de713d8a | 1286 | end: |
e58095ef MD |
1287 | return 0; |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * Called at library load: connect the probe on all enablers matching | |
1292 | * this event. | |
5f733922 | 1293 | * Called with session mutex held. |
e58095ef | 1294 | */ |
5f733922 | 1295 | int lttng_fix_pending_events(void) |
e58095ef | 1296 | { |
bdb12629 | 1297 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1298 | |
bdb12629 MD |
1299 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1300 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1301 | } |
e58095ef MD |
1302 | return 0; |
1303 | } | |
1304 | ||
d8d2416d FD |
1305 | int lttng_fix_pending_event_notifiers(void) |
1306 | { | |
1307 | struct lttng_event_notifier_group *event_notifier_group; | |
1308 | ||
1309 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1310 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1311 | } | |
1312 | return 0; | |
1313 | } | |
1314 | ||
246be17e | 1315 | /* |
37dddb65 MD |
1316 | * For each session of the owner thread, execute pending statedump. |
1317 | * Only dump state for the sessions owned by the caller thread, because | |
1318 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1319 | */ |
3327ac33 | 1320 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1321 | { |
bdb12629 | 1322 | struct lttng_ust_session_private *session_priv; |
246be17e | 1323 | |
37dddb65 | 1324 | /* Execute state dump */ |
cf73e0fe | 1325 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1326 | |
1327 | /* Clear pending state dump */ | |
3327ac33 MD |
1328 | if (ust_lock()) { |
1329 | goto end; | |
1330 | } | |
bdb12629 MD |
1331 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1332 | if (session_priv->owner != owner) | |
37dddb65 | 1333 | continue; |
bdb12629 | 1334 | if (!session_priv->statedump_pending) |
37dddb65 | 1335 | continue; |
bdb12629 | 1336 | session_priv->statedump_pending = 0; |
246be17e | 1337 | } |
3327ac33 | 1338 | end: |
37dddb65 | 1339 | ust_unlock(); |
3327ac33 | 1340 | return; |
246be17e PW |
1341 | } |
1342 | ||
e58095ef | 1343 | static |
ba99fbe2 | 1344 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1345 | { |
1346 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1347 | ||
ba99fbe2 | 1348 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1349 | /* Free event enabler refs */ |
1350 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1351 | &event->priv->enablers_ref_head, node) |
e58095ef | 1352 | free(enabler_ref); |
ba99fbe2 MD |
1353 | |
1354 | switch (event->type) { | |
1355 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1356 | { | |
1357 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1358 | ||
1359 | /* Remove from event list. */ | |
1360 | cds_list_del(&event_recorder->priv->node); | |
1361 | /* Remove from event hash table. */ | |
1362 | cds_hlist_del(&event_recorder->priv->hlist); | |
1363 | ||
a40b5b8c | 1364 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1365 | free(event_recorder->parent); |
1366 | free(event_recorder->priv); | |
1367 | free(event_recorder); | |
1368 | break; | |
1369 | } | |
1370 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1371 | { | |
1372 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1373 | ||
1374 | /* Remove from event list. */ | |
1375 | cds_list_del(&event_notifier->priv->node); | |
1376 | /* Remove from event hash table. */ | |
1377 | cds_hlist_del(&event_notifier->priv->hlist); | |
1378 | ||
1379 | free(event_notifier->priv); | |
1380 | free(event_notifier->parent); | |
1381 | free(event_notifier); | |
1382 | break; | |
1383 | } | |
1384 | default: | |
1385 | abort(); | |
1386 | } | |
8020ceb5 MD |
1387 | } |
1388 | ||
c785c634 MD |
1389 | static |
1390 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1391 | { | |
1392 | cds_list_del(&_enum->node); | |
35ac38cb | 1393 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1394 | free(_enum); |
1395 | } | |
1396 | ||
fd17d7ce | 1397 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1398 | { |
bdb12629 | 1399 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1400 | |
bdb12629 MD |
1401 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1402 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1403 | } |
457a6b58 | 1404 | |
e58095ef MD |
1405 | /* |
1406 | * Enabler management. | |
1407 | */ | |
d871c65b FD |
1408 | struct lttng_event_enabler *lttng_event_enabler_create( |
1409 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1410 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1411 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1412 | { |
d871c65b | 1413 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1414 | |
d871c65b FD |
1415 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1416 | if (!event_enabler) | |
e58095ef | 1417 | return NULL; |
d871c65b FD |
1418 | event_enabler->base.format_type = format_type; |
1419 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1420 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1421 | memcpy(&event_enabler->base.event_param, event_param, | |
1422 | sizeof(event_enabler->base.event_param)); | |
1423 | event_enabler->chan = chan; | |
e58095ef | 1424 | /* ctx left NULL */ |
d871c65b | 1425 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1426 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1427 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1428 | |
1429 | return event_enabler; | |
457a6b58 MD |
1430 | } |
1431 | ||
d8d2416d FD |
1432 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1433 | struct lttng_event_notifier_group *event_notifier_group, | |
1434 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1435 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1436 | { |
1437 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1438 | ||
1439 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1440 | if (!event_notifier_enabler) | |
1441 | return NULL; | |
1442 | event_notifier_enabler->base.format_type = format_type; | |
1443 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1444 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1445 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1446 | ||
1447 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1448 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1449 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1450 | |
1451 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1452 | event_notifier_param->event.name, | |
1453 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1454 | event_notifier_enabler->base.event_param.instrumentation = | |
1455 | event_notifier_param->event.instrumentation; | |
1456 | event_notifier_enabler->base.event_param.loglevel = | |
1457 | event_notifier_param->event.loglevel; | |
1458 | event_notifier_enabler->base.event_param.loglevel_type = | |
1459 | event_notifier_param->event.loglevel_type; | |
1460 | ||
1461 | event_notifier_enabler->base.enabled = 0; | |
1462 | event_notifier_enabler->group = event_notifier_group; | |
1463 | ||
1464 | cds_list_add(&event_notifier_enabler->node, | |
1465 | &event_notifier_group->enablers_head); | |
1466 | ||
1467 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1468 | ||
1469 | return event_notifier_enabler; | |
1470 | } | |
1471 | ||
d871c65b | 1472 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1473 | { |
d871c65b | 1474 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1475 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1476 | |
e58095ef | 1477 | return 0; |
457a6b58 | 1478 | } |
457a6b58 | 1479 | |
d871c65b | 1480 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1481 | { |
d871c65b | 1482 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1483 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1484 | |
e58095ef MD |
1485 | return 0; |
1486 | } | |
457a6b58 | 1487 | |
d871c65b | 1488 | static |
a56fd376 | 1489 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1490 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1491 | { |
ab89263e MD |
1492 | (*bytecode)->enabler = enabler; |
1493 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1494 | /* Take ownership of bytecode */ | |
1495 | *bytecode = NULL; | |
d871c65b FD |
1496 | } |
1497 | ||
a56fd376 | 1498 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1499 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1500 | { |
a56fd376 | 1501 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1502 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1503 | ||
e7bc0ef6 | 1504 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1505 | return 0; |
0bfb5cbd JI |
1506 | } |
1507 | ||
d871c65b FD |
1508 | static |
1509 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1510 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1511 | { |
e9fe6aad MD |
1512 | (*excluder)->enabler = enabler; |
1513 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1514 | /* Take ownership of excluder */ | |
1515 | *excluder = NULL; | |
d871c65b FD |
1516 | } |
1517 | ||
1518 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1519 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1520 | { |
1521 | _lttng_enabler_attach_exclusion( | |
1522 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1523 | ||
e7bc0ef6 | 1524 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1525 | return 0; |
e58095ef | 1526 | } |
f488575f | 1527 | |
d8d2416d FD |
1528 | int lttng_event_notifier_enabler_enable( |
1529 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1530 | { | |
1531 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1532 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1533 | ||
1534 | return 0; | |
1535 | } | |
1536 | ||
1537 | int lttng_event_notifier_enabler_disable( | |
1538 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1539 | { | |
1540 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1541 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1542 | ||
1543 | return 0; | |
1544 | } | |
1545 | ||
a56fd376 | 1546 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1547 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1548 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1549 | { |
a56fd376 | 1550 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1551 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1552 | bytecode); | |
1553 | ||
1554 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1555 | return 0; | |
1556 | } | |
1557 | ||
d37ecb3f FD |
1558 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1559 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1560 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1561 | { |
49cde654 | 1562 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1563 | event_notifier_enabler); |
49cde654 | 1564 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1565 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1566 | /* Take ownership of bytecode */ |
1567 | *bytecode = NULL; | |
d37ecb3f FD |
1568 | event_notifier_enabler->num_captures++; |
1569 | ||
1570 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1571 | return 0; | |
1572 | } | |
1573 | ||
d8d2416d FD |
1574 | int lttng_event_notifier_enabler_attach_exclusion( |
1575 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1576 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1577 | { |
1578 | _lttng_enabler_attach_exclusion( | |
1579 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1580 | excluder); | |
1581 | ||
1582 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1583 | return 0; | |
1584 | } | |
1585 | ||
fd17d7ce MD |
1586 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1587 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1588 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1589 | { |
457a6b58 | 1590 | /* |
e58095ef MD |
1591 | * We cannot attach a context after trace has been started for a |
1592 | * session because the metadata does not allow expressing this | |
1593 | * information outside of the original channel scope. | |
457a6b58 | 1594 | */ |
bdb12629 | 1595 | if (session->priv->been_active) |
e58095ef | 1596 | return -EPERM; |
457a6b58 | 1597 | |
e58095ef | 1598 | switch (context_param->ctx) { |
fd17d7ce | 1599 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1600 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1601 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1602 | { |
fd17d7ce | 1603 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1604 | |
1605 | perf_ctx_param = &context_param->u.perf_counter; | |
1606 | return lttng_add_perf_counter_to_ctx( | |
1607 | perf_ctx_param->type, | |
1608 | perf_ctx_param->config, | |
1609 | perf_ctx_param->name, | |
1610 | ctx); | |
1611 | } | |
fd17d7ce | 1612 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1613 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1614 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1615 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1616 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1617 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1618 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1619 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1620 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1621 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1622 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1623 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1624 | ctx); | |
fd17d7ce | 1625 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1626 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1627 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1628 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1629 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1630 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1631 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1632 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1633 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1634 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1635 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1636 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1637 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1638 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1639 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1640 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1641 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1642 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1643 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1644 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1645 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1646 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1647 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1648 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1649 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1650 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1651 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1652 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1653 | default: |
1654 | return -EINVAL; | |
457a6b58 | 1655 | } |
457a6b58 MD |
1656 | } |
1657 | ||
2208d8b5 MJ |
1658 | int lttng_event_enabler_attach_context( |
1659 | struct lttng_event_enabler *enabler __attribute__((unused)), | |
1660 | struct lttng_ust_abi_context *context_param __attribute__((unused))) | |
457a6b58 | 1661 | { |
e58095ef | 1662 | return -ENOSYS; |
457a6b58 MD |
1663 | } |
1664 | ||
d871c65b | 1665 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1666 | { |
d871c65b FD |
1667 | if (!event_enabler) { |
1668 | return; | |
0f63324a | 1669 | } |
d871c65b | 1670 | cds_list_del(&event_enabler->node); |
0f63324a | 1671 | |
d871c65b | 1672 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1673 | |
d871c65b FD |
1674 | lttng_destroy_context(event_enabler->ctx); |
1675 | free(event_enabler); | |
457a6b58 MD |
1676 | } |
1677 | ||
e58095ef | 1678 | /* |
d871c65b | 1679 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1680 | * session. |
1681 | */ | |
457a6b58 | 1682 | static |
f69fe5fb | 1683 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1684 | { |
d871c65b | 1685 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1686 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1687 | |
bdb12629 | 1688 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1689 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1690 | /* |
1691 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1692 | * and its channel and session transient states are enabled, we |
1693 | * enable the event, else we disable it. | |
e58095ef | 1694 | */ |
2e70391c | 1695 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1696 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1697 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1698 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1699 | int nr_filters = 0; | |
e58095ef MD |
1700 | |
1701 | /* Enable events */ | |
1702 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1703 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1704 | if (enabler_ref->ref->enabled) { |
1705 | enabled = 1; | |
1706 | break; | |
1707 | } | |
1708 | } | |
ac6b4ac6 MD |
1709 | /* |
1710 | * Enabled state is based on union of enablers, with | |
1711 | * intesection of session and channel transient enable | |
1712 | * states. | |
1713 | */ | |
e7bc0ef6 | 1714 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1715 | |
2e70391c | 1716 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1717 | /* |
1718 | * Sync tracepoint registration with event enabled | |
1719 | * state. | |
1720 | */ | |
1721 | if (enabled) { | |
2e70391c | 1722 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1723 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1724 | } else { |
2e70391c | 1725 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1726 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1727 | } |
457a6b58 | 1728 | |
1f49fc05 | 1729 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1730 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1731 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1732 | if (enabler_ref->ref->enabled |
1733 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1734 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1735 | break; |
1736 | } | |
1737 | } | |
a2e4d05e MD |
1738 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1739 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1740 | |
e58095ef MD |
1741 | /* Enable filters */ |
1742 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1743 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1744 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1745 | nr_filters++; |
457a6b58 | 1746 | } |
a2e4d05e MD |
1747 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1748 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1749 | } |
d10a2205 | 1750 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1751 | } |
1752 | ||
4296085e MD |
1753 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1754 | static | |
4e48b5d2 | 1755 | bool lttng_ust_probe_supports_event_notifier(const struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1756 | { |
1757 | return probe_desc->major >= 2; | |
1758 | } | |
1759 | ||
d8d2416d FD |
1760 | static |
1761 | void lttng_create_event_notifier_if_missing( | |
1762 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1763 | { | |
1764 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
4e48b5d2 | 1765 | struct lttng_ust_registered_probe *reg_probe; |
d8d2416d FD |
1766 | struct cds_list_head *probe_list; |
1767 | int i; | |
1768 | ||
1769 | probe_list = lttng_get_probe_list_head(); | |
1770 | ||
4e48b5d2 MD |
1771 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1772 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1773 | ||
d8d2416d FD |
1774 | for (i = 0; i < probe_desc->nr_events; i++) { |
1775 | int ret; | |
1776 | bool found = false; | |
4e48b5d2 | 1777 | const struct lttng_ust_event_desc *desc; |
115db533 | 1778 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1779 | struct cds_hlist_head *head; |
1780 | struct cds_hlist_node *node; | |
1781 | ||
1782 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1783 | |
d8d2416d FD |
1784 | if (!lttng_desc_match_enabler(desc, |
1785 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1786 | continue; | |
1787 | ||
1788 | /* | |
1789 | * Given the current event_notifier group, get the bucket that | |
1790 | * the target event_notifier would be if it was already | |
1791 | * created. | |
1792 | */ | |
1793 | head = borrow_hash_table_bucket( | |
1794 | event_notifier_group->event_notifiers_ht.table, | |
1795 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1796 | ||
115db533 | 1797 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1798 | /* |
1799 | * Check if event_notifier already exists by checking | |
1800 | * if the event_notifier and enabler share the same | |
1801 | * description and id. | |
1802 | */ | |
115db533 MD |
1803 | if (event_notifier_priv->parent.desc == desc && |
1804 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1805 | found = true; |
1806 | break; | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | if (found) | |
1811 | continue; | |
1812 | ||
4296085e MD |
1813 | /* Check that the probe supports event notifiers, else report the error. */ |
1814 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
5b4c6da4 | 1815 | ERR("Probe \"%s\" contains event \"%s:%s\" which matches an enabled event notifier, " |
4296085e MD |
1816 | "but its version (%u.%u) is too old and does not implement event notifiers. " |
1817 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1818 | "this event will not generate any notification.", | |
5b4c6da4 MD |
1819 | probe_desc->provider_name, |
1820 | probe_desc->provider_name, desc->event_name, | |
4296085e MD |
1821 | probe_desc->major, |
1822 | probe_desc->minor); | |
1823 | continue; | |
1824 | } | |
d8d2416d FD |
1825 | /* |
1826 | * We need to create a event_notifier for this event probe. | |
1827 | */ | |
1828 | ret = lttng_event_notifier_create(desc, | |
1829 | event_notifier_enabler->user_token, | |
6566528b | 1830 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1831 | event_notifier_group); |
1832 | if (ret) { | |
5b4c6da4 MD |
1833 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1834 | probe_desc->provider_name, | |
1835 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1836 | } |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | /* | |
1842 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1843 | */ | |
1844 | static | |
1845 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1846 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1847 | { | |
1848 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1849 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1850 | |
1851 | /* | |
1852 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1853 | * might still be attaching filter or exclusion to the | |
1854 | * event_notifier_enabler. | |
1855 | */ | |
1856 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1857 | goto end; | |
1858 | ||
1859 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1860 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1861 | ||
1862 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1863 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1864 | struct lttng_enabler_ref *enabler_ref; |
1865 | ||
115db533 | 1866 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1867 | continue; |
1868 | ||
115db533 | 1869 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1870 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1871 | if (!enabler_ref) { | |
1872 | /* | |
1873 | * If no backward ref, create it. | |
1874 | * Add backward ref from event_notifier to enabler. | |
1875 | */ | |
1876 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1877 | if (!enabler_ref) | |
1878 | return -ENOMEM; | |
1879 | ||
1880 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1881 | event_notifier_enabler); | |
1882 | cds_list_add(&enabler_ref->node, | |
115db533 | 1883 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1884 | } |
1885 | ||
1886 | /* | |
1887 | * Link filter bytecodes if not linked yet. | |
1888 | */ | |
115db533 | 1889 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1890 | &event_notifier_group->ctx, |
a2e4d05e | 1891 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1892 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1893 | |
1894 | /* | |
1895 | * Link capture bytecodes if not linked yet. | |
1896 | */ | |
115db533 | 1897 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1898 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1899 | &event_notifier_enabler->capture_bytecode_head); |
1900 | ||
115db533 | 1901 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1902 | } |
1903 | end: | |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | static | |
1908 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1909 | { | |
1910 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1911 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1912 | |
1913 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1914 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1915 | ||
1916 | /* | |
1917 | * For each event_notifier, if at least one of its enablers is enabled, | |
1918 | * we enable the event_notifier, else we disable it. | |
1919 | */ | |
115db533 | 1920 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1921 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1922 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1923 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1924 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1925 | |
1926 | /* Enable event_notifiers */ | |
1927 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1928 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1929 | if (enabler_ref->ref->enabled) { |
1930 | enabled = 1; | |
1931 | break; | |
1932 | } | |
1933 | } | |
1934 | ||
115db533 | 1935 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1936 | /* |
1937 | * Sync tracepoint registration with event_notifier enabled | |
1938 | * state. | |
1939 | */ | |
1940 | if (enabled) { | |
115db533 | 1941 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1942 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1943 | } else { |
115db533 | 1944 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1945 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1946 | } |
1947 | ||
1948 | /* Check if has enablers without bytecode enabled */ | |
1949 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1950 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1951 | if (enabler_ref->ref->enabled |
1952 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1953 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1954 | break; |
1955 | } | |
1956 | } | |
a2e4d05e MD |
1957 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1958 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1959 | |
1960 | /* Enable filters */ | |
1961 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1962 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1963 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1964 | nr_filters++; |
d8d2416d | 1965 | } |
a2e4d05e MD |
1966 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1967 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1968 | |
1969 | /* Enable captures. */ | |
1970 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1971 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1972 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1973 | nr_captures++; |
d37ecb3f | 1974 | } |
a2e4d05e MD |
1975 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1976 | !!nr_captures); | |
d8d2416d | 1977 | } |
d10a2205 | 1978 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1979 | } |
1980 | ||
e58095ef MD |
1981 | /* |
1982 | * Apply enablers to session events, adding events to session if need | |
1983 | * be. It is required after each modification applied to an active | |
1984 | * session, and right before session "start". | |
1985 | * "lazy" sync means we only sync if required. | |
1986 | */ | |
1987 | static | |
f69fe5fb | 1988 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1989 | { |
e58095ef MD |
1990 | /* We can skip if session is not active */ |
1991 | if (!session->active) | |
1992 | return; | |
d871c65b | 1993 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1994 | } |
53569322 MD |
1995 | |
1996 | /* | |
1997 | * Update all sessions with the given app context. | |
1998 | * Called with ust lock held. | |
1999 | * This is invoked when an application context gets loaded/unloaded. It | |
2000 | * ensures the context callbacks are in sync with the application | |
2001 | * context (either app context callbacks, or dummy callbacks). | |
2002 | */ | |
2003 | void lttng_ust_context_set_session_provider(const char *name, | |
4e48b5d2 MD |
2004 | size_t (*get_size)(void *priv, size_t offset), |
2005 | void (*record)(void *priv, struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2006 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2007 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2008 | void *priv) | |
53569322 | 2009 | { |
bdb12629 | 2010 | struct lttng_ust_session_private *session_priv; |
53569322 | 2011 | |
bdb12629 | 2012 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2013 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2014 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2015 | int ret; |
2016 | ||
bdb12629 | 2017 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
4e48b5d2 | 2018 | name, get_size, record, get_value, priv); |
53569322 MD |
2019 | if (ret) |
2020 | abort(); | |
bdb12629 | 2021 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2022 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
4e48b5d2 | 2023 | name, get_size, record, get_value, priv); |
53569322 MD |
2024 | if (ret) |
2025 | abort(); | |
2026 | } | |
2e70391c | 2027 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2028 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
4e48b5d2 | 2029 | name, get_size, record, get_value, priv); |
53569322 MD |
2030 | if (ret) |
2031 | abort(); | |
2032 | } | |
2033 | } | |
2034 | } | |
d8d2416d FD |
2035 | |
2036 | /* | |
2037 | * Update all event_notifier groups with the given app context. | |
2038 | * Called with ust lock held. | |
2039 | * This is invoked when an application context gets loaded/unloaded. It | |
2040 | * ensures the context callbacks are in sync with the application | |
2041 | * context (either app context callbacks, or dummy callbacks). | |
2042 | */ | |
2043 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
4e48b5d2 MD |
2044 | size_t (*get_size)(void *priv, size_t offset), |
2045 | void (*record)(void *priv, struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2046 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2047 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2048 | void *priv) | |
d8d2416d FD |
2049 | { |
2050 | struct lttng_event_notifier_group *event_notifier_group; | |
2051 | ||
2052 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2053 | int ret; | |
2054 | ||
2055 | ret = lttng_ust_context_set_provider_rcu( | |
2056 | &event_notifier_group->ctx, | |
4e48b5d2 | 2057 | name, get_size, record, get_value, priv); |
d8d2416d FD |
2058 | if (ret) |
2059 | abort(); | |
2060 | } | |
2061 | } | |
9daacd1a MD |
2062 | |
2063 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2064 | unsigned char *uuid) | |
2065 | { | |
2066 | if (!session) | |
2067 | return 0; | |
2068 | /* Compare UUID with session. */ | |
2069 | if (session->priv->uuid_set) { | |
2070 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2071 | return -1; | |
2072 | } | |
2073 | } else { | |
2074 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2075 | session->priv->uuid_set = true; | |
2076 | } | |
2077 | return 0; | |
2078 | ||
2079 | } |