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" |
3b5babf8 | 56 | #include "../libringbuffer/frontend_types.h" |
ebabbf58 | 57 | #include "../libcounter/counter.h" |
596c4223 | 58 | #include "jhash.h" |
d8d2416d | 59 | #include <lttng/ust-abi.h> |
8165c8da MD |
60 | |
61 | /* | |
3327ac33 MD |
62 | * All operations within this file are called by the communication |
63 | * thread, under ust_lock protection. | |
8165c8da | 64 | */ |
8165c8da | 65 | |
b5234c06 | 66 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 67 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 68 | |
7753d283 | 69 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
70 | { |
71 | return &sessions; | |
72 | } | |
73 | ||
ba99fbe2 | 74 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 75 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 76 | |
e58095ef | 77 | static |
f69fe5fb | 78 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 79 | static |
f69fe5fb | 80 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 81 | static |
d8d2416d FD |
82 | void lttng_event_notifier_group_sync_enablers( |
83 | struct lttng_event_notifier_group *event_notifier_group); | |
84 | static | |
e58095ef MD |
85 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
86 | ||
5b4c6da4 MD |
87 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
88 | { | |
89 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
90 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
91 | return false; | |
92 | return true; | |
93 | } | |
94 | ||
95 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
96 | char *name) | |
97 | { | |
98 | strcpy(name, desc->probe_desc->provider_name); | |
99 | strcat(name, ":"); | |
100 | strcat(name, desc->event_name); | |
101 | } | |
102 | ||
6715d7d1 MD |
103 | /* |
104 | * Called with ust lock held. | |
105 | */ | |
106 | int lttng_session_active(void) | |
107 | { | |
bdb12629 | 108 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
109 | |
110 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 111 | if (iter->pub->active) |
6715d7d1 MD |
112 | return 1; |
113 | } | |
114 | return 0; | |
115 | } | |
116 | ||
e58095ef MD |
117 | static |
118 | int lttng_loglevel_match(int loglevel, | |
119 | unsigned int has_loglevel, | |
fd17d7ce | 120 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
121 | int req_loglevel) |
122 | { | |
e58095ef MD |
123 | if (!has_loglevel) |
124 | loglevel = TRACE_DEFAULT; | |
457a6b58 | 125 | switch (req_type) { |
fd17d7ce | 126 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 127 | if (loglevel <= req_loglevel |
67ada458 | 128 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
129 | return 1; |
130 | else | |
131 | return 0; | |
fd17d7ce | 132 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 133 | if (loglevel == req_loglevel |
67ada458 | 134 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
135 | return 1; |
136 | else | |
137 | return 0; | |
fd17d7ce | 138 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 139 | default: |
67ada458 | 140 | if (loglevel <= TRACE_DEBUG) |
aacb3774 MD |
141 | return 1; |
142 | else | |
143 | return 0; | |
457a6b58 MD |
144 | } |
145 | } | |
146 | ||
f69fe5fb | 147 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 148 | { |
f69fe5fb | 149 | struct lttng_ust_session *session; |
bdb12629 | 150 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 151 | int i; |
8020ceb5 | 152 | |
f69fe5fb | 153 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
154 | if (!session) |
155 | return NULL; | |
f69fe5fb | 156 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
157 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
158 | if (!session_priv) { | |
53569322 MD |
159 | free(session); |
160 | return NULL; | |
161 | } | |
bdb12629 MD |
162 | session->priv = session_priv; |
163 | session_priv->pub = session; | |
164 | if (lttng_context_init_all(&session->priv->ctx)) { | |
165 | free(session_priv); | |
166 | free(session); | |
167 | return NULL; | |
168 | } | |
169 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
170 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
171 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
172 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 173 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 174 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 175 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
176 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
177 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
178 | return session; |
179 | } | |
180 | ||
ebabbf58 MD |
181 | struct lttng_counter *lttng_ust_counter_create( |
182 | const char *counter_transport_name, | |
183 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
184 | { | |
185 | struct lttng_counter_transport *counter_transport = NULL; | |
186 | struct lttng_counter *counter = NULL; | |
187 | ||
188 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
189 | if (!counter_transport) | |
190 | goto notransport; | |
191 | counter = zmalloc(sizeof(struct lttng_counter)); | |
192 | if (!counter) | |
193 | goto nomem; | |
194 | ||
195 | counter->ops = &counter_transport->ops; | |
196 | counter->transport = counter_transport; | |
197 | ||
198 | counter->counter = counter->ops->counter_create( | |
199 | number_dimensions, dimensions, 0, | |
200 | -1, 0, NULL, false); | |
201 | if (!counter->counter) { | |
202 | goto create_error; | |
203 | } | |
204 | ||
205 | return counter; | |
206 | ||
207 | create_error: | |
208 | free(counter); | |
209 | nomem: | |
210 | notransport: | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | static | |
215 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
216 | { | |
217 | counter->ops->counter_destroy(counter->counter); | |
218 | free(counter); | |
219 | } | |
220 | ||
d8d2416d FD |
221 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
222 | { | |
223 | struct lttng_event_notifier_group *event_notifier_group; | |
224 | int i; | |
225 | ||
226 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
227 | if (!event_notifier_group) | |
228 | return NULL; | |
229 | ||
51f804ec FD |
230 | /* Add all contexts. */ |
231 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
232 | free(event_notifier_group); | |
233 | return NULL; | |
234 | } | |
235 | ||
d8d2416d FD |
236 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
237 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
238 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
239 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
240 | ||
241 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
242 | ||
243 | return event_notifier_group; | |
244 | } | |
245 | ||
74d81a6c MD |
246 | /* |
247 | * Only used internally at session destruction. | |
248 | */ | |
249 | static | |
e7bc0ef6 | 250 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 251 | { |
5198080d | 252 | struct lttng_ust_lib_ring_buffer_channel *chan; |
74d81a6c MD |
253 | struct lttng_ust_shm_handle *handle; |
254 | ||
e7bc0ef6 | 255 | cds_list_del(<tng_chan->priv->node); |
0950190a | 256 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 257 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 258 | handle = chan->handle; |
74d81a6c | 259 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
260 | free(lttng_chan->parent); |
261 | free(lttng_chan->priv); | |
f0fde1c3 | 262 | free(lttng_chan); |
74d81a6c MD |
263 | } |
264 | ||
ac6b4ac6 | 265 | static |
ba99fbe2 | 266 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
267 | { |
268 | int ret; | |
a084756d | 269 | struct lttng_ust_event_desc *desc; |
5b4c6da4 | 270 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
ac6b4ac6 | 271 | |
ba99fbe2 MD |
272 | assert(event->priv->registered == 0); |
273 | desc = event->priv->desc; | |
5b4c6da4 MD |
274 | lttng_ust_format_event_name(desc, name); |
275 | ret = lttng_ust_tp_probe_register_queue_release(name, | |
ac6b4ac6 | 276 | desc->probe_callback, |
ba99fbe2 | 277 | event, desc->signature); |
ac6b4ac6 MD |
278 | WARN_ON_ONCE(ret); |
279 | if (!ret) | |
ba99fbe2 | 280 | event->priv->registered = 1; |
ac6b4ac6 MD |
281 | } |
282 | ||
d8d2416d | 283 | static |
ba99fbe2 | 284 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
285 | { |
286 | int ret; | |
a084756d | 287 | struct lttng_ust_event_desc *desc; |
5b4c6da4 | 288 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
d8d2416d | 289 | |
ba99fbe2 MD |
290 | assert(event->priv->registered == 1); |
291 | desc = event->priv->desc; | |
5b4c6da4 MD |
292 | lttng_ust_format_event_name(desc, name); |
293 | ret = lttng_ust_tp_probe_unregister_queue_release(name, | |
ac6b4ac6 | 294 | desc->probe_callback, |
ba99fbe2 | 295 | event); |
ac6b4ac6 MD |
296 | WARN_ON_ONCE(ret); |
297 | if (!ret) | |
ba99fbe2 | 298 | event->priv->registered = 0; |
ac6b4ac6 MD |
299 | } |
300 | ||
d8d2416d | 301 | static |
ba99fbe2 | 302 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 303 | { |
ba99fbe2 MD |
304 | if (event->priv->registered) |
305 | unregister_event(event); | |
d8d2416d FD |
306 | } |
307 | ||
f69fe5fb | 308 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 309 | { |
e7bc0ef6 | 310 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 311 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 312 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 313 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 314 | |
b5234c06 | 315 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 316 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 317 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 318 | } |
b653ddc1 | 319 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 320 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 321 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 322 | &session->priv->enablers_head, node) |
d871c65b | 323 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 324 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 325 | &session->priv->events_head, node) |
ba99fbe2 | 326 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 327 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 328 | &session->priv->enums_head, node) |
c785c634 | 329 | _lttng_enum_destroy(_enum); |
bdb12629 | 330 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 331 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
332 | cds_list_del(&session->priv->node); |
333 | lttng_destroy_context(session->priv->ctx); | |
334 | free(session->priv); | |
b5234c06 | 335 | free(session); |
8020ceb5 MD |
336 | } |
337 | ||
d8d2416d FD |
338 | void lttng_event_notifier_group_destroy( |
339 | struct lttng_event_notifier_group *event_notifier_group) | |
340 | { | |
341 | int close_ret; | |
342 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 343 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
344 | |
345 | if (!event_notifier_group) { | |
346 | return; | |
347 | } | |
348 | ||
ba99fbe2 | 349 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 350 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 351 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 352 | |
b653ddc1 | 353 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
354 | |
355 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
356 | &event_notifier_group->enablers_head, node) | |
357 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
358 | ||
ba99fbe2 | 359 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 360 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 361 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 362 | |
ebabbf58 MD |
363 | if (event_notifier_group->error_counter) |
364 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
365 | ||
366 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
367 | |
368 | lttng_ust_lock_fd_tracker(); | |
369 | close_ret = close(event_notifier_group->notification_fd); | |
370 | if (!close_ret) { | |
371 | lttng_ust_delete_fd_from_tracker( | |
372 | event_notifier_group->notification_fd); | |
373 | } else { | |
374 | PERROR("close"); | |
375 | abort(); | |
376 | } | |
377 | lttng_ust_unlock_fd_tracker(); | |
378 | ||
379 | cds_list_del(&event_notifier_group->node); | |
380 | ||
381 | free(event_notifier_group); | |
382 | } | |
383 | ||
d871c65b FD |
384 | static |
385 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
386 | { | |
ab249ecf | 387 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
388 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
389 | ||
390 | if (!enabler) { | |
391 | return; | |
392 | } | |
393 | ||
394 | /* Destroy filter bytecode */ | |
395 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
396 | &enabler->filter_bytecode_head, node) { | |
397 | free(filter_node); | |
398 | } | |
399 | ||
400 | /* Destroy excluders */ | |
401 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
402 | &enabler->excluder_head, node) { | |
403 | free(excluder_node); | |
404 | } | |
405 | } | |
406 | ||
d8d2416d FD |
407 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
408 | { | |
409 | if (!event_notifier_enabler) { | |
410 | return; | |
411 | } | |
412 | ||
413 | cds_list_del(&event_notifier_enabler->node); | |
414 | ||
415 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
416 | ||
417 | free(event_notifier_enabler); | |
418 | } | |
419 | ||
53569322 | 420 | static |
a084756d | 421 | int lttng_enum_create(struct lttng_ust_enum_desc *desc, |
f69fe5fb | 422 | struct lttng_ust_session *session) |
53569322 MD |
423 | { |
424 | const char *enum_name = desc->name; | |
425 | struct lttng_enum *_enum; | |
426 | struct cds_hlist_head *head; | |
53569322 MD |
427 | int ret = 0; |
428 | size_t name_len = strlen(enum_name); | |
429 | uint32_t hash; | |
430 | int notify_socket; | |
431 | ||
b33b46f7 | 432 | /* Check if this enum is already registered for this session. */ |
53569322 | 433 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 434 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
435 | |
436 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
437 | if (_enum) { | |
438 | ret = -EEXIST; | |
439 | goto exist; | |
53569322 MD |
440 | } |
441 | ||
bdb12629 | 442 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
443 | if (notify_socket < 0) { |
444 | ret = notify_socket; | |
445 | goto socket_error; | |
446 | } | |
447 | ||
448 | _enum = zmalloc(sizeof(*_enum)); | |
449 | if (!_enum) { | |
450 | ret = -ENOMEM; | |
451 | goto cache_error; | |
452 | } | |
453 | _enum->session = session; | |
454 | _enum->desc = desc; | |
455 | ||
456 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 457 | session->priv->objd, |
53569322 MD |
458 | enum_name, |
459 | desc->nr_entries, | |
460 | desc->entries, | |
461 | &_enum->id); | |
462 | if (ret < 0) { | |
463 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
464 | goto sessiond_register_error; | |
465 | } | |
bdb12629 | 466 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
467 | cds_hlist_add_head(&_enum->hlist, head); |
468 | return 0; | |
469 | ||
470 | sessiond_register_error: | |
471 | free(_enum); | |
472 | cache_error: | |
473 | socket_error: | |
474 | exist: | |
475 | return ret; | |
476 | } | |
477 | ||
478 | static | |
a084756d | 479 | int lttng_create_enum_check(struct lttng_ust_type_common *type, |
f69fe5fb | 480 | struct lttng_ust_session *session) |
53569322 | 481 | { |
a084756d MD |
482 | switch (type->type) { |
483 | case lttng_ust_type_enum: | |
218deb69 | 484 | { |
a084756d | 485 | struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
486 | int ret; |
487 | ||
a084756d | 488 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
489 | ret = lttng_enum_create(enum_desc, session); |
490 | if (ret && ret != -EEXIST) { | |
491 | DBG("Unable to create enum error: (%d)", ret); | |
492 | return ret; | |
493 | } | |
494 | break; | |
495 | } | |
a084756d | 496 | case lttng_ust_type_dynamic: |
53569322 | 497 | { |
a084756d MD |
498 | struct lttng_ust_event_field *tag_field_generic; |
499 | struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
500 | int ret; |
501 | ||
502 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 503 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
504 | ret = lttng_enum_create(enum_desc, session); |
505 | if (ret && ret != -EEXIST) { | |
506 | DBG("Unable to create enum error: (%d)", ret); | |
507 | return ret; | |
508 | } | |
509 | break; | |
510 | } | |
511 | default: | |
512 | /* TODO: nested types when they become supported. */ | |
513 | break; | |
514 | } | |
515 | return 0; | |
516 | } | |
517 | ||
518 | static | |
519 | int lttng_create_all_event_enums(size_t nr_fields, | |
a084756d | 520 | struct lttng_ust_event_field **event_fields, |
f69fe5fb | 521 | struct lttng_ust_session *session) |
53569322 MD |
522 | { |
523 | size_t i; | |
524 | int ret; | |
525 | ||
526 | /* For each field, ensure enum is part of the session. */ | |
527 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 528 | struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
529 | |
530 | ret = lttng_create_enum_check(type, session); | |
531 | if (ret) | |
532 | return ret; | |
533 | } | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static | |
538 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
daacdbfc | 539 | struct lttng_ust_ctx_field **ctx_fields, |
f69fe5fb | 540 | struct lttng_ust_session *session) |
53569322 MD |
541 | { |
542 | size_t i; | |
543 | int ret; | |
544 | ||
545 | /* For each field, ensure enum is part of the session. */ | |
546 | for (i = 0; i < nr_fields; i++) { | |
a084756d | 547 | struct lttng_ust_type_common *type = ctx_fields[i]->event_field->type; |
53569322 MD |
548 | |
549 | ret = lttng_create_enum_check(type, session); | |
550 | if (ret) | |
551 | return ret; | |
552 | } | |
553 | return 0; | |
554 | } | |
555 | ||
710b8ee3 MD |
556 | /* |
557 | * Ensure that a state-dump will be performed for this session at the end | |
558 | * of the current handle_message(). | |
559 | */ | |
f69fe5fb | 560 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 561 | { |
bdb12629 MD |
562 | session->priv->statedump_pending = 1; |
563 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
564 | return 0; |
565 | } | |
53569322 | 566 | |
f69fe5fb | 567 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
568 | { |
569 | int ret = 0; | |
e7bc0ef6 | 570 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 571 | int notify_socket; |
8020ceb5 | 572 | |
8020ceb5 MD |
573 | if (session->active) { |
574 | ret = -EBUSY; | |
575 | goto end; | |
576 | } | |
577 | ||
bdb12629 | 578 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
579 | if (notify_socket < 0) |
580 | return notify_socket; | |
581 | ||
ac6b4ac6 | 582 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 583 | session->priv->tstate = 1; |
e58095ef | 584 | |
3ff7660f | 585 | /* We need to sync enablers with session before activation. */ |
d871c65b | 586 | lttng_session_sync_event_enablers(session); |
3ff7660f | 587 | |
8020ceb5 MD |
588 | /* |
589 | * Snapshot the number of events per channel to know the type of header | |
590 | * we need to use. | |
591 | */ | |
bdb12629 | 592 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 593 | struct lttng_ust_ctx *ctx; |
daacdbfc | 594 | struct lttng_ust_ctx_field **fields = NULL; |
32ce8569 | 595 | size_t nr_fields = 0; |
6ca18e66 | 596 | uint32_t chan_id; |
32ce8569 MD |
597 | |
598 | /* don't change it if session stop/restart */ | |
8020ceb5 | 599 | if (chan->header_type) |
32ce8569 | 600 | continue; |
0950190a | 601 | ctx = chan->ctx; |
32ce8569 MD |
602 | if (ctx) { |
603 | nr_fields = ctx->nr_fields; | |
83e43212 | 604 | fields = ctx->fields; |
53569322 MD |
605 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
606 | session); | |
607 | if (ret < 0) { | |
608 | DBG("Error (%d) adding enum to session", ret); | |
609 | return ret; | |
610 | } | |
32ce8569 MD |
611 | } |
612 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 613 | session, |
bdb12629 | 614 | session->priv->objd, |
e7bc0ef6 | 615 | chan->parent.objd, |
32ce8569 MD |
616 | nr_fields, |
617 | fields, | |
6ca18e66 | 618 | &chan_id, |
32ce8569 | 619 | &chan->header_type); |
b869b5ae MD |
620 | if (ret) { |
621 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 622 | return ret; |
b869b5ae | 623 | } |
6ca18e66 MD |
624 | if (chan_id != chan->id) { |
625 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
626 | chan_id, chan->id); | |
627 | return -EINVAL; | |
628 | } | |
8020ceb5 MD |
629 | } |
630 | ||
ac6b4ac6 | 631 | /* Set atomically the state to "active" */ |
b5234c06 | 632 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 633 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 634 | |
710b8ee3 MD |
635 | ret = lttng_session_statedump(session); |
636 | if (ret) | |
637 | return ret; | |
8020ceb5 | 638 | end: |
8020ceb5 MD |
639 | return ret; |
640 | } | |
641 | ||
f69fe5fb | 642 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
643 | { |
644 | int ret = 0; | |
645 | ||
8020ceb5 MD |
646 | if (!session->active) { |
647 | ret = -EBUSY; | |
648 | goto end; | |
649 | } | |
ac6b4ac6 | 650 | /* Set atomically the state to "inactive" */ |
b5234c06 | 651 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
652 | |
653 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 654 | session->priv->tstate = 0; |
d871c65b | 655 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 656 | end: |
8020ceb5 MD |
657 | return ret; |
658 | } | |
659 | ||
e7bc0ef6 | 660 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 661 | { |
ac6b4ac6 | 662 | int ret = 0; |
976fe9ea | 663 | |
e7bc0ef6 | 664 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
665 | ret = -EBUSY; |
666 | goto end; | |
667 | } | |
668 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
669 | lttng_channel->priv->tstate = 1; |
670 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 671 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 672 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
673 | end: |
674 | return ret; | |
976fe9ea MD |
675 | } |
676 | ||
e7bc0ef6 | 677 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 678 | { |
ac6b4ac6 | 679 | int ret = 0; |
976fe9ea | 680 | |
e7bc0ef6 | 681 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
682 | ret = -EBUSY; |
683 | goto end; | |
684 | } | |
685 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 686 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 687 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
688 | lttng_channel->priv->tstate = 0; |
689 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
690 | end: |
691 | return ret; | |
976fe9ea MD |
692 | } |
693 | ||
fb470188 FD |
694 | static inline |
695 | struct cds_hlist_head *borrow_hash_table_bucket( | |
696 | struct cds_hlist_head *hash_table, | |
697 | unsigned int hash_table_size, | |
a084756d | 698 | struct lttng_ust_event_desc *desc) |
fb470188 | 699 | { |
5b4c6da4 | 700 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
701 | size_t name_len; |
702 | uint32_t hash; | |
703 | ||
5b4c6da4 MD |
704 | lttng_ust_format_event_name(desc, name); |
705 | name_len = strlen(name); | |
fb470188 | 706 | |
5b4c6da4 | 707 | hash = jhash(name, name_len, 0); |
fb470188 FD |
708 | return &hash_table[hash & (hash_table_size - 1)]; |
709 | } | |
710 | ||
8020ceb5 MD |
711 | /* |
712 | * Supports event creation while tracing session is active. | |
713 | */ | |
e58095ef | 714 | static |
a084756d | 715 | int lttng_event_recorder_create(struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 716 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 717 | { |
5b4c6da4 | 718 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
719 | struct lttng_ust_event_recorder *event_recorder; |
720 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 721 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 722 | struct cds_hlist_head *head; |
576599a0 | 723 | int ret = 0; |
32ce8569 MD |
724 | int notify_socket, loglevel; |
725 | const char *uri; | |
8020ceb5 | 726 | |
e7bc0ef6 | 727 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 728 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 729 | |
bdb12629 | 730 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
731 | if (notify_socket < 0) { |
732 | ret = notify_socket; | |
733 | goto socket_error; | |
734 | } | |
735 | ||
53569322 MD |
736 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
737 | session); | |
c785c634 MD |
738 | if (ret < 0) { |
739 | DBG("Error (%d) adding enum to session", ret); | |
740 | goto create_enum_error; | |
741 | } | |
742 | ||
457a6b58 MD |
743 | /* |
744 | * Check if loglevel match. Refuse to connect event if not. | |
745 | */ | |
2e70391c MD |
746 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
747 | if (!event_recorder) { | |
576599a0 | 748 | ret = -ENOMEM; |
8020ceb5 | 749 | goto cache_error; |
576599a0 | 750 | } |
2e70391c | 751 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 752 | |
7ee76145 | 753 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 754 | if (!event_recorder->parent) { |
80333dfa MD |
755 | ret = -ENOMEM; |
756 | goto parent_error; | |
757 | } | |
7ee76145 | 758 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 759 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 760 | event_recorder->parent->child = event_recorder; |
80333dfa | 761 | |
2e70391c MD |
762 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
763 | if (!event_recorder_priv) { | |
68bb7559 MD |
764 | ret = -ENOMEM; |
765 | goto priv_error; | |
766 | } | |
2e70391c MD |
767 | event_recorder->priv = event_recorder_priv; |
768 | event_recorder_priv->pub = event_recorder; | |
769 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
770 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 771 | |
2e70391c | 772 | event_recorder->chan = chan; |
e58095ef | 773 | |
ac6b4ac6 | 774 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 775 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
776 | event_recorder->parent->enabled = 0; |
777 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 778 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
779 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
780 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
781 | |
782 | if (desc->loglevel) | |
2e70391c | 783 | loglevel = *(*event_recorder->parent->priv->desc->loglevel); |
32ce8569 MD |
784 | else |
785 | loglevel = TRACE_DEFAULT; | |
dc11f93f MD |
786 | if (desc->model_emf_uri) |
787 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
788 | else |
789 | uri = NULL; | |
790 | ||
5b4c6da4 MD |
791 | lttng_ust_format_event_name(desc, name); |
792 | ||
13b21cd6 MD |
793 | /* Fetch event ID from sessiond */ |
794 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 795 | session, |
bdb12629 | 796 | session->priv->objd, |
e7bc0ef6 | 797 | chan->priv->parent.objd, |
5b4c6da4 | 798 | name, |
13b21cd6 MD |
799 | loglevel, |
800 | desc->signature, | |
801 | desc->nr_fields, | |
802 | desc->fields, | |
803 | uri, | |
2e70391c | 804 | &event_recorder->id); |
13b21cd6 MD |
805 | if (ret < 0) { |
806 | DBG("Error (%d) registering event to sessiond", ret); | |
807 | goto sessiond_register_error; | |
32ce8569 | 808 | } |
2b213b16 | 809 | |
e7bc0ef6 | 810 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 811 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 812 | return 0; |
8020ceb5 | 813 | |
32ce8569 | 814 | sessiond_register_error: |
2e70391c | 815 | free(event_recorder_priv); |
68bb7559 | 816 | priv_error: |
2e70391c | 817 | free(event_recorder->parent); |
80333dfa | 818 | parent_error: |
2e70391c | 819 | free(event_recorder); |
8020ceb5 | 820 | cache_error: |
c785c634 | 821 | create_enum_error: |
32ce8569 | 822 | socket_error: |
576599a0 | 823 | return ret; |
8020ceb5 MD |
824 | } |
825 | ||
d8d2416d | 826 | static |
a084756d | 827 | int lttng_event_notifier_create(struct lttng_ust_event_desc *desc, |
6566528b | 828 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
829 | struct lttng_event_notifier_group *event_notifier_group) |
830 | { | |
d7d45c0d | 831 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 832 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
833 | struct cds_hlist_head *head; |
834 | int ret = 0; | |
835 | ||
836 | /* | |
837 | * Get the hashtable bucket the created lttng_event_notifier object | |
838 | * should be inserted. | |
839 | */ | |
840 | head = borrow_hash_table_bucket( | |
841 | event_notifier_group->event_notifiers_ht.table, | |
842 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
843 | ||
d7d45c0d | 844 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
845 | if (!event_notifier) { |
846 | ret = -ENOMEM; | |
847 | goto error; | |
848 | } | |
d7d45c0d | 849 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 850 | |
115db533 MD |
851 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
852 | if (!event_notifier->parent) { | |
853 | ret = -ENOMEM; | |
854 | goto parent_error; | |
855 | } | |
856 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 857 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 858 | event_notifier->parent->child = event_notifier; |
115db533 MD |
859 | |
860 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
861 | if (!event_notifier_priv) { | |
862 | ret = -ENOMEM; | |
863 | goto priv_error; | |
864 | } | |
865 | event_notifier->priv = event_notifier_priv; | |
866 | event_notifier_priv->pub = event_notifier; | |
867 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
868 | event_notifier_priv->parent.pub = event_notifier->parent; | |
869 | ||
870 | event_notifier_priv->group = event_notifier_group; | |
871 | event_notifier_priv->parent.user_token = token; | |
872 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
873 | |
874 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 875 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
876 | event_notifier->parent->enabled = 0; |
877 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 878 | |
a2e4d05e MD |
879 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
880 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
881 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
882 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 883 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 884 | |
115db533 | 885 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 886 | &event_notifier_group->event_notifiers_head); |
115db533 | 887 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
888 | |
889 | return 0; | |
890 | ||
115db533 MD |
891 | priv_error: |
892 | free(event_notifier->parent); | |
893 | parent_error: | |
894 | free(event_notifier); | |
d8d2416d FD |
895 | error: |
896 | return ret; | |
897 | } | |
898 | ||
e58095ef | 899 | static |
a084756d | 900 | int lttng_desc_match_star_glob_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
901 | struct lttng_enabler *enabler) |
902 | { | |
5b4c6da4 | 903 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 904 | int loglevel = 0; |
7e2e405c | 905 | unsigned int has_loglevel = 0; |
e58095ef | 906 | |
5b4c6da4 | 907 | lttng_ust_format_event_name(desc, name); |
e450e339 | 908 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 909 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 910 | name, SIZE_MAX)) |
e58095ef MD |
911 | return 0; |
912 | if (desc->loglevel) { | |
913 | loglevel = *(*desc->loglevel); | |
914 | has_loglevel = 1; | |
915 | } | |
916 | if (!lttng_loglevel_match(loglevel, | |
917 | has_loglevel, | |
918 | enabler->event_param.loglevel_type, | |
919 | enabler->event_param.loglevel)) | |
920 | return 0; | |
921 | return 1; | |
922 | } | |
923 | ||
924 | static | |
a084756d | 925 | int lttng_desc_match_event_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
926 | struct lttng_enabler *enabler) |
927 | { | |
5b4c6da4 | 928 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
929 | int loglevel = 0; |
930 | unsigned int has_loglevel = 0; | |
931 | ||
5b4c6da4 | 932 | lttng_ust_format_event_name(desc, name); |
e450e339 | 933 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 934 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
935 | return 0; |
936 | if (desc->loglevel) { | |
937 | loglevel = *(*desc->loglevel); | |
938 | has_loglevel = 1; | |
939 | } | |
940 | if (!lttng_loglevel_match(loglevel, | |
941 | has_loglevel, | |
942 | enabler->event_param.loglevel_type, | |
943 | enabler->event_param.loglevel)) | |
944 | return 0; | |
945 | return 1; | |
946 | } | |
947 | ||
948 | static | |
a084756d | 949 | int lttng_desc_match_enabler(struct lttng_ust_event_desc *desc, |
e58095ef MD |
950 | struct lttng_enabler *enabler) |
951 | { | |
e450e339 FD |
952 | switch (enabler->format_type) { |
953 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
954 | { |
955 | struct lttng_ust_excluder_node *excluder; | |
956 | ||
957 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
958 | return 0; | |
959 | } | |
960 | ||
961 | /* | |
962 | * If the matching event matches with an excluder, | |
963 | * return 'does not match' | |
964 | */ | |
965 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
966 | int count; | |
967 | ||
968 | for (count = 0; count < excluder->excluder.count; count++) { | |
969 | int len; | |
970 | char *excluder_name; | |
971 | ||
972 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
973 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
974 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
975 | if (len > 0) { |
976 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
977 | ||
978 | lttng_ust_format_event_name(desc, name); | |
979 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
980 | return 0; | |
981 | } | |
982 | } | |
ed5b5bbd JI |
983 | } |
984 | } | |
196ec2df | 985 | return 1; |
ed5b5bbd | 986 | } |
e450e339 | 987 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
988 | return lttng_desc_match_event_enabler(desc, enabler); |
989 | default: | |
990 | return -EINVAL; | |
991 | } | |
992 | } | |
993 | ||
994 | static | |
d871c65b | 995 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 996 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 997 | { |
2e70391c | 998 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 999 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 1000 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
1001 | return 1; |
1002 | else | |
1003 | return 0; | |
e58095ef MD |
1004 | } |
1005 | ||
d8d2416d FD |
1006 | static |
1007 | int lttng_event_notifier_enabler_match_event_notifier( | |
1008 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1009 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1010 | { |
115db533 | 1011 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1012 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1013 | ||
115db533 MD |
1014 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1015 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1016 | return 1; |
1017 | else | |
1018 | return 0; | |
1019 | } | |
1020 | ||
e58095ef | 1021 | static |
d871c65b FD |
1022 | struct lttng_enabler_ref *lttng_enabler_ref( |
1023 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1024 | struct lttng_enabler *enabler) |
1025 | { | |
1026 | struct lttng_enabler_ref *enabler_ref; | |
1027 | ||
d871c65b | 1028 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1029 | if (enabler_ref->ref == enabler) |
1030 | return enabler_ref; | |
1031 | } | |
1032 | return NULL; | |
1033 | } | |
1034 | ||
8020ceb5 | 1035 | /* |
e58095ef MD |
1036 | * Create struct lttng_event if it is missing and present in the list of |
1037 | * tracepoint probes. | |
8020ceb5 | 1038 | */ |
e58095ef | 1039 | static |
ba99fbe2 | 1040 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1041 | { |
e7bc0ef6 | 1042 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
dc11f93f | 1043 | struct lttng_ust_probe_desc *probe_desc; |
a084756d | 1044 | struct lttng_ust_event_desc *desc; |
2e70391c | 1045 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1046 | int i; |
1047 | struct cds_list_head *probe_list; | |
1048 | ||
1049 | probe_list = lttng_get_probe_list_head(); | |
1050 | /* | |
1051 | * For each probe event, if we find that a probe event matches | |
1052 | * our enabler, create an associated lttng_event if not | |
1053 | * already present. | |
1054 | */ | |
1055 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1056 | for (i = 0; i < probe_desc->nr_events; i++) { | |
98a97f24 FD |
1057 | int ret; |
1058 | bool found = false; | |
d56fa719 MD |
1059 | struct cds_hlist_head *head; |
1060 | struct cds_hlist_node *node; | |
e58095ef MD |
1061 | |
1062 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1063 | if (!lttng_desc_match_enabler(desc, |
1064 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1065 | continue; |
1066 | ||
fb470188 | 1067 | head = borrow_hash_table_bucket( |
bdb12629 | 1068 | session->priv->events_ht.table, |
fb470188 FD |
1069 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1070 | ||
2e70391c MD |
1071 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1072 | if (event_recorder_priv->parent.desc == desc | |
1073 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1074 | found = true; |
3140bffe FD |
1075 | break; |
1076 | } | |
e58095ef MD |
1077 | } |
1078 | if (found) | |
1079 | continue; | |
1080 | ||
1081 | /* | |
1082 | * We need to create an event for this | |
1083 | * event probe. | |
1084 | */ | |
2e70391c | 1085 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1086 | event_enabler->chan); |
e58095ef | 1087 | if (ret) { |
5b4c6da4 MD |
1088 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1089 | probe_desc->provider_name, | |
1090 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1091 | } |
8165c8da | 1092 | } |
8020ceb5 | 1093 | } |
8020ceb5 MD |
1094 | } |
1095 | ||
a44d07da | 1096 | static |
dc11f93f | 1097 | void probe_provider_event_for_each(struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1098 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1099 | { |
1100 | struct cds_hlist_node *node, *tmp_node; | |
1101 | struct cds_list_head *sessionsp; | |
a44d07da | 1102 | unsigned int i; |
35ac38cb FD |
1103 | |
1104 | /* Get handle on list of sessions. */ | |
7753d283 | 1105 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1106 | |
1107 | /* | |
a44d07da FD |
1108 | * Iterate over all events in the probe provider descriptions and |
1109 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1110 | */ |
1111 | for (i = 0; i < provider_desc->nr_events; i++) { | |
a084756d | 1112 | struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1113 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1114 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1115 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1116 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1117 | struct cds_hlist_head *head; |
35ac38cb FD |
1118 | |
1119 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1120 | |
a44d07da FD |
1121 | /* |
1122 | * Iterate over all session to find the current event | |
1123 | * description. | |
1124 | */ | |
bdb12629 | 1125 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1126 | /* |
a44d07da FD |
1127 | * Get the list of events in the hashtable bucket and |
1128 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1129 | */ |
fb470188 | 1130 | head = borrow_hash_table_bucket( |
bdb12629 | 1131 | session_priv->events_ht.table, |
fb470188 FD |
1132 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1133 | ||
2e70391c MD |
1134 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1135 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1136 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1137 | break; |
1138 | } | |
1139 | } | |
1140 | } | |
d8d2416d FD |
1141 | |
1142 | /* | |
1143 | * Iterate over all event_notifier groups to find the current event | |
1144 | * description. | |
1145 | */ | |
1146 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1147 | /* | |
1148 | * Get the list of event_notifiers in the hashtable bucket and | |
1149 | * iterate to find the event_notifier matching this | |
1150 | * descriptor. | |
1151 | */ | |
1152 | head = borrow_hash_table_bucket( | |
1153 | event_notifier_group->event_notifiers_ht.table, | |
1154 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1155 | ||
115db533 MD |
1156 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1157 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1158 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1159 | break; |
1160 | } | |
1161 | } | |
1162 | } | |
35ac38cb | 1163 | } |
a44d07da FD |
1164 | } |
1165 | ||
1166 | static | |
ba99fbe2 | 1167 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1168 | { |
a44d07da | 1169 | |
ba99fbe2 MD |
1170 | switch (event->type) { |
1171 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1172 | { | |
1173 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1174 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1175 | unsigned int i; |
1176 | ||
1177 | /* Destroy enums of the current event. */ | |
1178 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
a084756d MD |
1179 | struct lttng_ust_enum_desc *enum_desc; |
1180 | struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1181 | struct lttng_enum *curr_enum; |
1182 | ||
25cff019 | 1183 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1184 | switch (field->type->type) { |
1185 | case lttng_ust_type_enum: | |
1186 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1187 | break; |
1188 | default: | |
1189 | continue; | |
1190 | } | |
a44d07da | 1191 | |
ba99fbe2 MD |
1192 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1193 | if (curr_enum) { | |
1194 | _lttng_enum_destroy(curr_enum); | |
1195 | } | |
a44d07da | 1196 | } |
ba99fbe2 MD |
1197 | break; |
1198 | } | |
1199 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1200 | break; | |
1201 | default: | |
1202 | abort(); | |
a44d07da | 1203 | } |
a44d07da | 1204 | /* Destroy event. */ |
ba99fbe2 | 1205 | _lttng_event_destroy(event); |
a44d07da FD |
1206 | } |
1207 | ||
1208 | /* | |
1209 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1210 | * the probe provider descriptor received as argument. Must me called with the | |
1211 | * ust_lock held. | |
1212 | */ | |
1213 | void lttng_probe_provider_unregister_events( | |
dc11f93f | 1214 | struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1215 | { |
1216 | /* | |
1217 | * Iterate over all events in the probe provider descriptions and sessions | |
1218 | * to queue the unregistration of the events. | |
1219 | */ | |
ba99fbe2 | 1220 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1221 | |
1222 | /* Wait for grace period. */ | |
b653ddc1 | 1223 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1224 | /* Prune the unregistration queue. */ |
d10a2205 | 1225 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1226 | |
1227 | /* | |
1228 | * It is now safe to destroy the events and remove them from the event list | |
1229 | * and hashtables. | |
1230 | */ | |
ba99fbe2 | 1231 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1232 | } |
1233 | ||
8020ceb5 | 1234 | /* |
d8d2416d | 1235 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1236 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1237 | */ |
1238 | static | |
ba99fbe2 | 1239 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1240 | { |
e7bc0ef6 | 1241 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1242 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1243 | |
d871c65b | 1244 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1245 | goto end; |
1246 | ||
e58095ef | 1247 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1248 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1249 | |
1250 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1251 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1252 | struct lttng_enabler_ref *enabler_ref; |
1253 | ||
2e70391c | 1254 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1255 | continue; |
1256 | ||
2e70391c | 1257 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1258 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1259 | if (!enabler_ref) { |
1260 | /* | |
1261 | * If no backward ref, create it. | |
1262 | * Add backward ref from event to enabler. | |
1263 | */ | |
1264 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1265 | if (!enabler_ref) | |
1266 | return -ENOMEM; | |
d871c65b FD |
1267 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1268 | event_enabler); | |
e58095ef | 1269 | cds_list_add(&enabler_ref->node, |
2e70391c | 1270 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1271 | } |
e58095ef MD |
1272 | |
1273 | /* | |
1274 | * Link filter bytecodes if not linked yet. | |
1275 | */ | |
2e70391c | 1276 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1277 | &session->priv->ctx, |
a2e4d05e | 1278 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1279 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1280 | |
1281 | /* TODO: merge event context. */ | |
1282 | } | |
de713d8a | 1283 | end: |
e58095ef MD |
1284 | return 0; |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Called at library load: connect the probe on all enablers matching | |
1289 | * this event. | |
5f733922 | 1290 | * Called with session mutex held. |
e58095ef | 1291 | */ |
5f733922 | 1292 | int lttng_fix_pending_events(void) |
e58095ef | 1293 | { |
bdb12629 | 1294 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1295 | |
bdb12629 MD |
1296 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1297 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1298 | } |
e58095ef MD |
1299 | return 0; |
1300 | } | |
1301 | ||
d8d2416d FD |
1302 | int lttng_fix_pending_event_notifiers(void) |
1303 | { | |
1304 | struct lttng_event_notifier_group *event_notifier_group; | |
1305 | ||
1306 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1307 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1308 | } | |
1309 | return 0; | |
1310 | } | |
1311 | ||
246be17e | 1312 | /* |
37dddb65 MD |
1313 | * For each session of the owner thread, execute pending statedump. |
1314 | * Only dump state for the sessions owned by the caller thread, because | |
1315 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1316 | */ |
3327ac33 | 1317 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1318 | { |
bdb12629 | 1319 | struct lttng_ust_session_private *session_priv; |
246be17e | 1320 | |
37dddb65 | 1321 | /* Execute state dump */ |
cf73e0fe | 1322 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1323 | |
1324 | /* Clear pending state dump */ | |
3327ac33 MD |
1325 | if (ust_lock()) { |
1326 | goto end; | |
1327 | } | |
bdb12629 MD |
1328 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1329 | if (session_priv->owner != owner) | |
37dddb65 | 1330 | continue; |
bdb12629 | 1331 | if (!session_priv->statedump_pending) |
37dddb65 | 1332 | continue; |
bdb12629 | 1333 | session_priv->statedump_pending = 0; |
246be17e | 1334 | } |
3327ac33 | 1335 | end: |
37dddb65 | 1336 | ust_unlock(); |
3327ac33 | 1337 | return; |
246be17e PW |
1338 | } |
1339 | ||
e58095ef | 1340 | static |
ba99fbe2 | 1341 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1342 | { |
1343 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1344 | ||
ba99fbe2 | 1345 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1346 | /* Free event enabler refs */ |
1347 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1348 | &event->priv->enablers_ref_head, node) |
e58095ef | 1349 | free(enabler_ref); |
ba99fbe2 MD |
1350 | |
1351 | switch (event->type) { | |
1352 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1353 | { | |
1354 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1355 | ||
1356 | /* Remove from event list. */ | |
1357 | cds_list_del(&event_recorder->priv->node); | |
1358 | /* Remove from event hash table. */ | |
1359 | cds_hlist_del(&event_recorder->priv->hlist); | |
1360 | ||
a40b5b8c | 1361 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1362 | free(event_recorder->parent); |
1363 | free(event_recorder->priv); | |
1364 | free(event_recorder); | |
1365 | break; | |
1366 | } | |
1367 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1368 | { | |
1369 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1370 | ||
1371 | /* Remove from event list. */ | |
1372 | cds_list_del(&event_notifier->priv->node); | |
1373 | /* Remove from event hash table. */ | |
1374 | cds_hlist_del(&event_notifier->priv->hlist); | |
1375 | ||
1376 | free(event_notifier->priv); | |
1377 | free(event_notifier->parent); | |
1378 | free(event_notifier); | |
1379 | break; | |
1380 | } | |
1381 | default: | |
1382 | abort(); | |
1383 | } | |
8020ceb5 MD |
1384 | } |
1385 | ||
c785c634 MD |
1386 | static |
1387 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1388 | { | |
1389 | cds_list_del(&_enum->node); | |
35ac38cb | 1390 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1391 | free(_enum); |
1392 | } | |
1393 | ||
fd17d7ce | 1394 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1395 | { |
bdb12629 | 1396 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1397 | |
bdb12629 MD |
1398 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1399 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1400 | } |
457a6b58 | 1401 | |
e58095ef MD |
1402 | /* |
1403 | * Enabler management. | |
1404 | */ | |
d871c65b FD |
1405 | struct lttng_event_enabler *lttng_event_enabler_create( |
1406 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1407 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1408 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1409 | { |
d871c65b | 1410 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1411 | |
d871c65b FD |
1412 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1413 | if (!event_enabler) | |
e58095ef | 1414 | return NULL; |
d871c65b FD |
1415 | event_enabler->base.format_type = format_type; |
1416 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1417 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1418 | memcpy(&event_enabler->base.event_param, event_param, | |
1419 | sizeof(event_enabler->base.event_param)); | |
1420 | event_enabler->chan = chan; | |
e58095ef | 1421 | /* ctx left NULL */ |
d871c65b | 1422 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1423 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1424 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1425 | |
1426 | return event_enabler; | |
457a6b58 MD |
1427 | } |
1428 | ||
d8d2416d FD |
1429 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1430 | struct lttng_event_notifier_group *event_notifier_group, | |
1431 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1432 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1433 | { |
1434 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1435 | ||
1436 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1437 | if (!event_notifier_enabler) | |
1438 | return NULL; | |
1439 | event_notifier_enabler->base.format_type = format_type; | |
1440 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1441 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1442 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1443 | ||
1444 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1445 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1446 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1447 | |
1448 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1449 | event_notifier_param->event.name, | |
1450 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1451 | event_notifier_enabler->base.event_param.instrumentation = | |
1452 | event_notifier_param->event.instrumentation; | |
1453 | event_notifier_enabler->base.event_param.loglevel = | |
1454 | event_notifier_param->event.loglevel; | |
1455 | event_notifier_enabler->base.event_param.loglevel_type = | |
1456 | event_notifier_param->event.loglevel_type; | |
1457 | ||
1458 | event_notifier_enabler->base.enabled = 0; | |
1459 | event_notifier_enabler->group = event_notifier_group; | |
1460 | ||
1461 | cds_list_add(&event_notifier_enabler->node, | |
1462 | &event_notifier_group->enablers_head); | |
1463 | ||
1464 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1465 | ||
1466 | return event_notifier_enabler; | |
1467 | } | |
1468 | ||
d871c65b | 1469 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1470 | { |
d871c65b | 1471 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1472 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1473 | |
e58095ef | 1474 | return 0; |
457a6b58 | 1475 | } |
457a6b58 | 1476 | |
d871c65b | 1477 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1478 | { |
d871c65b | 1479 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1480 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1481 | |
e58095ef MD |
1482 | return 0; |
1483 | } | |
457a6b58 | 1484 | |
d871c65b | 1485 | static |
a56fd376 | 1486 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1487 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1488 | { |
ab89263e MD |
1489 | (*bytecode)->enabler = enabler; |
1490 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1491 | /* Take ownership of bytecode */ | |
1492 | *bytecode = NULL; | |
d871c65b FD |
1493 | } |
1494 | ||
a56fd376 | 1495 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1496 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1497 | { |
a56fd376 | 1498 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1499 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1500 | ||
e7bc0ef6 | 1501 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1502 | return 0; |
0bfb5cbd JI |
1503 | } |
1504 | ||
d871c65b FD |
1505 | static |
1506 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1507 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1508 | { |
e9fe6aad MD |
1509 | (*excluder)->enabler = enabler; |
1510 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1511 | /* Take ownership of excluder */ | |
1512 | *excluder = NULL; | |
d871c65b FD |
1513 | } |
1514 | ||
1515 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1516 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1517 | { |
1518 | _lttng_enabler_attach_exclusion( | |
1519 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1520 | ||
e7bc0ef6 | 1521 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1522 | return 0; |
e58095ef | 1523 | } |
f488575f | 1524 | |
d8d2416d FD |
1525 | int lttng_event_notifier_enabler_enable( |
1526 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1527 | { | |
1528 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1529 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1530 | ||
1531 | return 0; | |
1532 | } | |
1533 | ||
1534 | int lttng_event_notifier_enabler_disable( | |
1535 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1536 | { | |
1537 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1538 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1539 | ||
1540 | return 0; | |
1541 | } | |
1542 | ||
a56fd376 | 1543 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1544 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1545 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1546 | { |
a56fd376 | 1547 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1548 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1549 | bytecode); | |
1550 | ||
1551 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1552 | return 0; | |
1553 | } | |
1554 | ||
d37ecb3f FD |
1555 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1556 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1557 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1558 | { |
49cde654 | 1559 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1560 | event_notifier_enabler); |
49cde654 | 1561 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1562 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1563 | /* Take ownership of bytecode */ |
1564 | *bytecode = NULL; | |
d37ecb3f FD |
1565 | event_notifier_enabler->num_captures++; |
1566 | ||
1567 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1568 | return 0; | |
1569 | } | |
1570 | ||
d8d2416d FD |
1571 | int lttng_event_notifier_enabler_attach_exclusion( |
1572 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1573 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1574 | { |
1575 | _lttng_enabler_attach_exclusion( | |
1576 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1577 | excluder); | |
1578 | ||
1579 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1580 | return 0; | |
1581 | } | |
1582 | ||
fd17d7ce MD |
1583 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1584 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1585 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1586 | { |
457a6b58 | 1587 | /* |
e58095ef MD |
1588 | * We cannot attach a context after trace has been started for a |
1589 | * session because the metadata does not allow expressing this | |
1590 | * information outside of the original channel scope. | |
457a6b58 | 1591 | */ |
bdb12629 | 1592 | if (session->priv->been_active) |
e58095ef | 1593 | return -EPERM; |
457a6b58 | 1594 | |
e58095ef | 1595 | switch (context_param->ctx) { |
fd17d7ce | 1596 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1597 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1598 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1599 | { |
fd17d7ce | 1600 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1601 | |
1602 | perf_ctx_param = &context_param->u.perf_counter; | |
1603 | return lttng_add_perf_counter_to_ctx( | |
1604 | perf_ctx_param->type, | |
1605 | perf_ctx_param->config, | |
1606 | perf_ctx_param->name, | |
1607 | ctx); | |
1608 | } | |
fd17d7ce | 1609 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1610 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1611 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1612 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1613 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1614 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1615 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1616 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1617 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1618 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1619 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1620 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1621 | ctx); | |
fd17d7ce | 1622 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1623 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1624 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1625 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1626 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1627 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1628 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1629 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1630 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1631 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1632 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1633 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1634 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1635 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1636 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1637 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1638 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1639 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1640 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1641 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1642 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1643 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1644 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1645 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1646 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1647 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1648 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1649 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1650 | default: |
1651 | return -EINVAL; | |
457a6b58 | 1652 | } |
457a6b58 MD |
1653 | } |
1654 | ||
d871c65b | 1655 | int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler, |
fd17d7ce | 1656 | struct lttng_ust_abi_context *context_param) |
457a6b58 | 1657 | { |
e58095ef | 1658 | return -ENOSYS; |
457a6b58 MD |
1659 | } |
1660 | ||
d871c65b | 1661 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1662 | { |
d871c65b FD |
1663 | if (!event_enabler) { |
1664 | return; | |
0f63324a | 1665 | } |
d871c65b | 1666 | cds_list_del(&event_enabler->node); |
0f63324a | 1667 | |
d871c65b | 1668 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1669 | |
d871c65b FD |
1670 | lttng_destroy_context(event_enabler->ctx); |
1671 | free(event_enabler); | |
457a6b58 MD |
1672 | } |
1673 | ||
e58095ef | 1674 | /* |
d871c65b | 1675 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1676 | * session. |
1677 | */ | |
457a6b58 | 1678 | static |
f69fe5fb | 1679 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1680 | { |
d871c65b | 1681 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1682 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1683 | |
bdb12629 | 1684 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1685 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1686 | /* |
1687 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1688 | * and its channel and session transient states are enabled, we |
1689 | * enable the event, else we disable it. | |
e58095ef | 1690 | */ |
2e70391c | 1691 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1692 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1693 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1694 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1695 | int nr_filters = 0; | |
e58095ef MD |
1696 | |
1697 | /* Enable events */ | |
1698 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1699 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1700 | if (enabler_ref->ref->enabled) { |
1701 | enabled = 1; | |
1702 | break; | |
1703 | } | |
1704 | } | |
ac6b4ac6 MD |
1705 | /* |
1706 | * Enabled state is based on union of enablers, with | |
1707 | * intesection of session and channel transient enable | |
1708 | * states. | |
1709 | */ | |
e7bc0ef6 | 1710 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1711 | |
2e70391c | 1712 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1713 | /* |
1714 | * Sync tracepoint registration with event enabled | |
1715 | * state. | |
1716 | */ | |
1717 | if (enabled) { | |
2e70391c | 1718 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1719 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1720 | } else { |
2e70391c | 1721 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1722 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1723 | } |
457a6b58 | 1724 | |
1f49fc05 | 1725 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1726 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1727 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1728 | if (enabler_ref->ref->enabled |
1729 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1730 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1731 | break; |
1732 | } | |
1733 | } | |
a2e4d05e MD |
1734 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1735 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1736 | |
e58095ef MD |
1737 | /* Enable filters */ |
1738 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1739 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1740 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1741 | nr_filters++; |
457a6b58 | 1742 | } |
a2e4d05e MD |
1743 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1744 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1745 | } |
d10a2205 | 1746 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1747 | } |
1748 | ||
4296085e MD |
1749 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1750 | static | |
dc11f93f | 1751 | bool lttng_ust_probe_supports_event_notifier(struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1752 | { |
1753 | return probe_desc->major >= 2; | |
1754 | } | |
1755 | ||
d8d2416d FD |
1756 | static |
1757 | void lttng_create_event_notifier_if_missing( | |
1758 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1759 | { | |
1760 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
dc11f93f | 1761 | struct lttng_ust_probe_desc *probe_desc; |
d8d2416d FD |
1762 | struct cds_list_head *probe_list; |
1763 | int i; | |
1764 | ||
1765 | probe_list = lttng_get_probe_list_head(); | |
1766 | ||
1767 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1768 | for (i = 0; i < probe_desc->nr_events; i++) { | |
1769 | int ret; | |
1770 | bool found = false; | |
a084756d | 1771 | struct lttng_ust_event_desc *desc; |
115db533 | 1772 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1773 | struct cds_hlist_head *head; |
1774 | struct cds_hlist_node *node; | |
1775 | ||
1776 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1777 | |
d8d2416d FD |
1778 | if (!lttng_desc_match_enabler(desc, |
1779 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1780 | continue; | |
1781 | ||
1782 | /* | |
1783 | * Given the current event_notifier group, get the bucket that | |
1784 | * the target event_notifier would be if it was already | |
1785 | * created. | |
1786 | */ | |
1787 | head = borrow_hash_table_bucket( | |
1788 | event_notifier_group->event_notifiers_ht.table, | |
1789 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1790 | ||
115db533 | 1791 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1792 | /* |
1793 | * Check if event_notifier already exists by checking | |
1794 | * if the event_notifier and enabler share the same | |
1795 | * description and id. | |
1796 | */ | |
115db533 MD |
1797 | if (event_notifier_priv->parent.desc == desc && |
1798 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1799 | found = true; |
1800 | break; | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | if (found) | |
1805 | continue; | |
1806 | ||
4296085e MD |
1807 | /* Check that the probe supports event notifiers, else report the error. */ |
1808 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
5b4c6da4 | 1809 | ERR("Probe \"%s\" contains event \"%s:%s\" which matches an enabled event notifier, " |
4296085e MD |
1810 | "but its version (%u.%u) is too old and does not implement event notifiers. " |
1811 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1812 | "this event will not generate any notification.", | |
5b4c6da4 MD |
1813 | probe_desc->provider_name, |
1814 | probe_desc->provider_name, desc->event_name, | |
4296085e MD |
1815 | probe_desc->major, |
1816 | probe_desc->minor); | |
1817 | continue; | |
1818 | } | |
d8d2416d FD |
1819 | /* |
1820 | * We need to create a event_notifier for this event probe. | |
1821 | */ | |
1822 | ret = lttng_event_notifier_create(desc, | |
1823 | event_notifier_enabler->user_token, | |
6566528b | 1824 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1825 | event_notifier_group); |
1826 | if (ret) { | |
5b4c6da4 MD |
1827 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1828 | probe_desc->provider_name, | |
1829 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1830 | } |
1831 | } | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | /* | |
1836 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1837 | */ | |
1838 | static | |
1839 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1840 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1841 | { | |
1842 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1843 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1844 | |
1845 | /* | |
1846 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1847 | * might still be attaching filter or exclusion to the | |
1848 | * event_notifier_enabler. | |
1849 | */ | |
1850 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1851 | goto end; | |
1852 | ||
1853 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1854 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1855 | ||
1856 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1857 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1858 | struct lttng_enabler_ref *enabler_ref; |
1859 | ||
115db533 | 1860 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1861 | continue; |
1862 | ||
115db533 | 1863 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1864 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1865 | if (!enabler_ref) { | |
1866 | /* | |
1867 | * If no backward ref, create it. | |
1868 | * Add backward ref from event_notifier to enabler. | |
1869 | */ | |
1870 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1871 | if (!enabler_ref) | |
1872 | return -ENOMEM; | |
1873 | ||
1874 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1875 | event_notifier_enabler); | |
1876 | cds_list_add(&enabler_ref->node, | |
115db533 | 1877 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1878 | } |
1879 | ||
1880 | /* | |
1881 | * Link filter bytecodes if not linked yet. | |
1882 | */ | |
115db533 | 1883 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1884 | &event_notifier_group->ctx, |
a2e4d05e | 1885 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1886 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1887 | |
1888 | /* | |
1889 | * Link capture bytecodes if not linked yet. | |
1890 | */ | |
115db533 | 1891 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1892 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1893 | &event_notifier_enabler->capture_bytecode_head); |
1894 | ||
115db533 | 1895 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1896 | } |
1897 | end: | |
1898 | return 0; | |
1899 | } | |
1900 | ||
1901 | static | |
1902 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1903 | { | |
1904 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1905 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1906 | |
1907 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1908 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1909 | ||
1910 | /* | |
1911 | * For each event_notifier, if at least one of its enablers is enabled, | |
1912 | * we enable the event_notifier, else we disable it. | |
1913 | */ | |
115db533 | 1914 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1915 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1916 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1917 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1918 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1919 | |
1920 | /* Enable event_notifiers */ | |
1921 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1922 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1923 | if (enabler_ref->ref->enabled) { |
1924 | enabled = 1; | |
1925 | break; | |
1926 | } | |
1927 | } | |
1928 | ||
115db533 | 1929 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1930 | /* |
1931 | * Sync tracepoint registration with event_notifier enabled | |
1932 | * state. | |
1933 | */ | |
1934 | if (enabled) { | |
115db533 | 1935 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1936 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1937 | } else { |
115db533 | 1938 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1939 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1940 | } |
1941 | ||
1942 | /* Check if has enablers without bytecode enabled */ | |
1943 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1944 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1945 | if (enabler_ref->ref->enabled |
1946 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1947 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1948 | break; |
1949 | } | |
1950 | } | |
a2e4d05e MD |
1951 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1952 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1953 | |
1954 | /* Enable filters */ | |
1955 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1956 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1957 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1958 | nr_filters++; |
d8d2416d | 1959 | } |
a2e4d05e MD |
1960 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1961 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1962 | |
1963 | /* Enable captures. */ | |
1964 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1965 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1966 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1967 | nr_captures++; |
d37ecb3f | 1968 | } |
a2e4d05e MD |
1969 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1970 | !!nr_captures); | |
d8d2416d | 1971 | } |
d10a2205 | 1972 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1973 | } |
1974 | ||
e58095ef MD |
1975 | /* |
1976 | * Apply enablers to session events, adding events to session if need | |
1977 | * be. It is required after each modification applied to an active | |
1978 | * session, and right before session "start". | |
1979 | * "lazy" sync means we only sync if required. | |
1980 | */ | |
1981 | static | |
f69fe5fb | 1982 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1983 | { |
e58095ef MD |
1984 | /* We can skip if session is not active */ |
1985 | if (!session->active) | |
1986 | return; | |
d871c65b | 1987 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1988 | } |
53569322 MD |
1989 | |
1990 | /* | |
1991 | * Update all sessions with the given app context. | |
1992 | * Called with ust lock held. | |
1993 | * This is invoked when an application context gets loaded/unloaded. It | |
1994 | * ensures the context callbacks are in sync with the application | |
1995 | * context (either app context callbacks, or dummy callbacks). | |
1996 | */ | |
1997 | void lttng_ust_context_set_session_provider(const char *name, | |
daacdbfc MD |
1998 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
1999 | void (*record)(struct lttng_ust_ctx_field *field, | |
53569322 | 2000 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2001 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
2002 | void (*get_value)(struct lttng_ust_ctx_field *field, |
2003 | struct lttng_ust_ctx_value *value)) | |
53569322 | 2004 | { |
bdb12629 | 2005 | struct lttng_ust_session_private *session_priv; |
53569322 | 2006 | |
bdb12629 | 2007 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2008 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2009 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2010 | int ret; |
2011 | ||
bdb12629 | 2012 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
53569322 MD |
2013 | name, get_size, record, get_value); |
2014 | if (ret) | |
2015 | abort(); | |
bdb12629 | 2016 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2017 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
53569322 MD |
2018 | name, get_size, record, get_value); |
2019 | if (ret) | |
2020 | abort(); | |
2021 | } | |
2e70391c | 2022 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2023 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
53569322 MD |
2024 | name, get_size, record, get_value); |
2025 | if (ret) | |
2026 | abort(); | |
2027 | } | |
2028 | } | |
2029 | } | |
d8d2416d FD |
2030 | |
2031 | /* | |
2032 | * Update all event_notifier groups with the given app context. | |
2033 | * Called with ust lock held. | |
2034 | * This is invoked when an application context gets loaded/unloaded. It | |
2035 | * ensures the context callbacks are in sync with the application | |
2036 | * context (either app context callbacks, or dummy callbacks). | |
2037 | */ | |
2038 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
daacdbfc MD |
2039 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
2040 | void (*record)(struct lttng_ust_ctx_field *field, | |
d8d2416d | 2041 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2042 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
2043 | void (*get_value)(struct lttng_ust_ctx_field *field, |
2044 | struct lttng_ust_ctx_value *value)) | |
d8d2416d FD |
2045 | { |
2046 | struct lttng_event_notifier_group *event_notifier_group; | |
2047 | ||
2048 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2049 | int ret; | |
2050 | ||
2051 | ret = lttng_ust_context_set_provider_rcu( | |
2052 | &event_notifier_group->ctx, | |
2053 | name, get_size, record, get_value); | |
2054 | if (ret) | |
2055 | abort(); | |
2056 | } | |
2057 | } | |
9daacd1a MD |
2058 | |
2059 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2060 | unsigned char *uuid) | |
2061 | { | |
2062 | if (!session) | |
2063 | return 0; | |
2064 | /* Compare UUID with session. */ | |
2065 | if (session->priv->uuid_set) { | |
2066 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2067 | return -1; | |
2068 | } | |
2069 | } else { | |
2070 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2071 | session->priv->uuid_set = true; | |
2072 | } | |
2073 | return 0; | |
2074 | ||
2075 | } |