Commit | Line | Data |
---|---|---|
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" |
b89c5899 | 57 | #include "../libringbuffer/frontend.h" |
ebabbf58 | 58 | #include "../libcounter/counter.h" |
596c4223 | 59 | #include "jhash.h" |
d8d2416d | 60 | #include <lttng/ust-abi.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; | |
a084756d | 270 | 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; | |
a084756d | 288 | 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); | |
381 | ||
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 |
a084756d | 422 | int lttng_enum_create(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 | |
a084756d | 480 | int lttng_create_enum_check(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 | { |
a084756d | 486 | 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 | { |
a084756d MD |
499 | struct lttng_ust_event_field *tag_field_generic; |
500 | 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, | |
a084756d | 521 | 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++) { | |
a084756d | 529 | 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, | |
daacdbfc | 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++) { | |
a084756d | 548 | 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; |
daacdbfc | 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, | |
a084756d | 699 | 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 |
a084756d | 716 | int lttng_event_recorder_create(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 |
a084756d | 828 | int lttng_event_notifier_create(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 |
a084756d | 901 | int lttng_desc_match_star_glob_enabler(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 | |
a084756d | 926 | int lttng_desc_match_event_enabler(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 | |
a084756d | 950 | int lttng_desc_match_enabler(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; |
dc11f93f | 1044 | struct lttng_ust_probe_desc *probe_desc; |
a084756d | 1045 | 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 | */ | |
1056 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1057 | for (i = 0; i < probe_desc->nr_events; i++) { | |
98a97f24 FD |
1058 | int ret; |
1059 | bool found = false; | |
d56fa719 MD |
1060 | struct cds_hlist_head *head; |
1061 | struct cds_hlist_node *node; | |
e58095ef MD |
1062 | |
1063 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1064 | if (!lttng_desc_match_enabler(desc, |
1065 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1066 | continue; |
1067 | ||
fb470188 | 1068 | head = borrow_hash_table_bucket( |
bdb12629 | 1069 | session->priv->events_ht.table, |
fb470188 FD |
1070 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1071 | ||
2e70391c MD |
1072 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1073 | if (event_recorder_priv->parent.desc == desc | |
1074 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1075 | found = true; |
3140bffe FD |
1076 | break; |
1077 | } | |
e58095ef MD |
1078 | } |
1079 | if (found) | |
1080 | continue; | |
1081 | ||
1082 | /* | |
1083 | * We need to create an event for this | |
1084 | * event probe. | |
1085 | */ | |
2e70391c | 1086 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1087 | event_enabler->chan); |
e58095ef | 1088 | if (ret) { |
5b4c6da4 MD |
1089 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1090 | probe_desc->provider_name, | |
1091 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1092 | } |
8165c8da | 1093 | } |
8020ceb5 | 1094 | } |
8020ceb5 MD |
1095 | } |
1096 | ||
a44d07da | 1097 | static |
dc11f93f | 1098 | void probe_provider_event_for_each(struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1099 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1100 | { |
1101 | struct cds_hlist_node *node, *tmp_node; | |
1102 | struct cds_list_head *sessionsp; | |
a44d07da | 1103 | unsigned int i; |
35ac38cb FD |
1104 | |
1105 | /* Get handle on list of sessions. */ | |
7753d283 | 1106 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1107 | |
1108 | /* | |
a44d07da FD |
1109 | * Iterate over all events in the probe provider descriptions and |
1110 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1111 | */ |
1112 | for (i = 0; i < provider_desc->nr_events; i++) { | |
a084756d | 1113 | struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1114 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1115 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1116 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1117 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1118 | struct cds_hlist_head *head; |
35ac38cb FD |
1119 | |
1120 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1121 | |
a44d07da FD |
1122 | /* |
1123 | * Iterate over all session to find the current event | |
1124 | * description. | |
1125 | */ | |
bdb12629 | 1126 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1127 | /* |
a44d07da FD |
1128 | * Get the list of events in the hashtable bucket and |
1129 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1130 | */ |
fb470188 | 1131 | head = borrow_hash_table_bucket( |
bdb12629 | 1132 | session_priv->events_ht.table, |
fb470188 FD |
1133 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1134 | ||
2e70391c MD |
1135 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1136 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1137 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1138 | break; |
1139 | } | |
1140 | } | |
1141 | } | |
d8d2416d FD |
1142 | |
1143 | /* | |
1144 | * Iterate over all event_notifier groups to find the current event | |
1145 | * description. | |
1146 | */ | |
1147 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1148 | /* | |
1149 | * Get the list of event_notifiers in the hashtable bucket and | |
1150 | * iterate to find the event_notifier matching this | |
1151 | * descriptor. | |
1152 | */ | |
1153 | head = borrow_hash_table_bucket( | |
1154 | event_notifier_group->event_notifiers_ht.table, | |
1155 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1156 | ||
115db533 MD |
1157 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1158 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1159 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1160 | break; |
1161 | } | |
1162 | } | |
1163 | } | |
35ac38cb | 1164 | } |
a44d07da FD |
1165 | } |
1166 | ||
1167 | static | |
ba99fbe2 | 1168 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1169 | { |
a44d07da | 1170 | |
ba99fbe2 MD |
1171 | switch (event->type) { |
1172 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1173 | { | |
1174 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1175 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1176 | unsigned int i; |
1177 | ||
1178 | /* Destroy enums of the current event. */ | |
1179 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
a084756d MD |
1180 | struct lttng_ust_enum_desc *enum_desc; |
1181 | struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1182 | struct lttng_enum *curr_enum; |
1183 | ||
25cff019 | 1184 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1185 | switch (field->type->type) { |
1186 | case lttng_ust_type_enum: | |
1187 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1188 | break; |
1189 | default: | |
1190 | continue; | |
1191 | } | |
a44d07da | 1192 | |
ba99fbe2 MD |
1193 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1194 | if (curr_enum) { | |
1195 | _lttng_enum_destroy(curr_enum); | |
1196 | } | |
a44d07da | 1197 | } |
ba99fbe2 MD |
1198 | break; |
1199 | } | |
1200 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1201 | break; | |
1202 | default: | |
1203 | abort(); | |
a44d07da | 1204 | } |
a44d07da | 1205 | /* Destroy event. */ |
ba99fbe2 | 1206 | _lttng_event_destroy(event); |
a44d07da FD |
1207 | } |
1208 | ||
1209 | /* | |
1210 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1211 | * the probe provider descriptor received as argument. Must me called with the | |
1212 | * ust_lock held. | |
1213 | */ | |
1214 | void lttng_probe_provider_unregister_events( | |
dc11f93f | 1215 | struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1216 | { |
1217 | /* | |
1218 | * Iterate over all events in the probe provider descriptions and sessions | |
1219 | * to queue the unregistration of the events. | |
1220 | */ | |
ba99fbe2 | 1221 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1222 | |
1223 | /* Wait for grace period. */ | |
b653ddc1 | 1224 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1225 | /* Prune the unregistration queue. */ |
d10a2205 | 1226 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1227 | |
1228 | /* | |
1229 | * It is now safe to destroy the events and remove them from the event list | |
1230 | * and hashtables. | |
1231 | */ | |
ba99fbe2 | 1232 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1233 | } |
1234 | ||
8020ceb5 | 1235 | /* |
d8d2416d | 1236 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1237 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1238 | */ |
1239 | static | |
ba99fbe2 | 1240 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1241 | { |
e7bc0ef6 | 1242 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1243 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1244 | |
d871c65b | 1245 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1246 | goto end; |
1247 | ||
e58095ef | 1248 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1249 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1250 | |
1251 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1252 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1253 | struct lttng_enabler_ref *enabler_ref; |
1254 | ||
2e70391c | 1255 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1256 | continue; |
1257 | ||
2e70391c | 1258 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1259 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1260 | if (!enabler_ref) { |
1261 | /* | |
1262 | * If no backward ref, create it. | |
1263 | * Add backward ref from event to enabler. | |
1264 | */ | |
1265 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1266 | if (!enabler_ref) | |
1267 | return -ENOMEM; | |
d871c65b FD |
1268 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1269 | event_enabler); | |
e58095ef | 1270 | cds_list_add(&enabler_ref->node, |
2e70391c | 1271 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1272 | } |
e58095ef MD |
1273 | |
1274 | /* | |
1275 | * Link filter bytecodes if not linked yet. | |
1276 | */ | |
2e70391c | 1277 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1278 | &session->priv->ctx, |
a2e4d05e | 1279 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1280 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1281 | |
1282 | /* TODO: merge event context. */ | |
1283 | } | |
de713d8a | 1284 | end: |
e58095ef MD |
1285 | return 0; |
1286 | } | |
1287 | ||
1288 | /* | |
1289 | * Called at library load: connect the probe on all enablers matching | |
1290 | * this event. | |
5f733922 | 1291 | * Called with session mutex held. |
e58095ef | 1292 | */ |
5f733922 | 1293 | int lttng_fix_pending_events(void) |
e58095ef | 1294 | { |
bdb12629 | 1295 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1296 | |
bdb12629 MD |
1297 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1298 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1299 | } |
e58095ef MD |
1300 | return 0; |
1301 | } | |
1302 | ||
d8d2416d FD |
1303 | int lttng_fix_pending_event_notifiers(void) |
1304 | { | |
1305 | struct lttng_event_notifier_group *event_notifier_group; | |
1306 | ||
1307 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1308 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1309 | } | |
1310 | return 0; | |
1311 | } | |
1312 | ||
246be17e | 1313 | /* |
37dddb65 MD |
1314 | * For each session of the owner thread, execute pending statedump. |
1315 | * Only dump state for the sessions owned by the caller thread, because | |
1316 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1317 | */ |
3327ac33 | 1318 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1319 | { |
bdb12629 | 1320 | struct lttng_ust_session_private *session_priv; |
246be17e | 1321 | |
37dddb65 | 1322 | /* Execute state dump */ |
cf73e0fe | 1323 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1324 | |
1325 | /* Clear pending state dump */ | |
3327ac33 MD |
1326 | if (ust_lock()) { |
1327 | goto end; | |
1328 | } | |
bdb12629 MD |
1329 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1330 | if (session_priv->owner != owner) | |
37dddb65 | 1331 | continue; |
bdb12629 | 1332 | if (!session_priv->statedump_pending) |
37dddb65 | 1333 | continue; |
bdb12629 | 1334 | session_priv->statedump_pending = 0; |
246be17e | 1335 | } |
3327ac33 | 1336 | end: |
37dddb65 | 1337 | ust_unlock(); |
3327ac33 | 1338 | return; |
246be17e PW |
1339 | } |
1340 | ||
e58095ef | 1341 | static |
ba99fbe2 | 1342 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1343 | { |
1344 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1345 | ||
ba99fbe2 | 1346 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1347 | /* Free event enabler refs */ |
1348 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1349 | &event->priv->enablers_ref_head, node) |
e58095ef | 1350 | free(enabler_ref); |
ba99fbe2 MD |
1351 | |
1352 | switch (event->type) { | |
1353 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1354 | { | |
1355 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1356 | ||
1357 | /* Remove from event list. */ | |
1358 | cds_list_del(&event_recorder->priv->node); | |
1359 | /* Remove from event hash table. */ | |
1360 | cds_hlist_del(&event_recorder->priv->hlist); | |
1361 | ||
a40b5b8c | 1362 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1363 | free(event_recorder->parent); |
1364 | free(event_recorder->priv); | |
1365 | free(event_recorder); | |
1366 | break; | |
1367 | } | |
1368 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1369 | { | |
1370 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1371 | ||
1372 | /* Remove from event list. */ | |
1373 | cds_list_del(&event_notifier->priv->node); | |
1374 | /* Remove from event hash table. */ | |
1375 | cds_hlist_del(&event_notifier->priv->hlist); | |
1376 | ||
1377 | free(event_notifier->priv); | |
1378 | free(event_notifier->parent); | |
1379 | free(event_notifier); | |
1380 | break; | |
1381 | } | |
1382 | default: | |
1383 | abort(); | |
1384 | } | |
8020ceb5 MD |
1385 | } |
1386 | ||
c785c634 MD |
1387 | static |
1388 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1389 | { | |
1390 | cds_list_del(&_enum->node); | |
35ac38cb | 1391 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1392 | free(_enum); |
1393 | } | |
1394 | ||
fd17d7ce | 1395 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1396 | { |
bdb12629 | 1397 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1398 | |
bdb12629 MD |
1399 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1400 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1401 | } |
457a6b58 | 1402 | |
e58095ef MD |
1403 | /* |
1404 | * Enabler management. | |
1405 | */ | |
d871c65b FD |
1406 | struct lttng_event_enabler *lttng_event_enabler_create( |
1407 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1408 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1409 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1410 | { |
d871c65b | 1411 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1412 | |
d871c65b FD |
1413 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1414 | if (!event_enabler) | |
e58095ef | 1415 | return NULL; |
d871c65b FD |
1416 | event_enabler->base.format_type = format_type; |
1417 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1418 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1419 | memcpy(&event_enabler->base.event_param, event_param, | |
1420 | sizeof(event_enabler->base.event_param)); | |
1421 | event_enabler->chan = chan; | |
e58095ef | 1422 | /* ctx left NULL */ |
d871c65b | 1423 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1424 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1425 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1426 | |
1427 | return event_enabler; | |
457a6b58 MD |
1428 | } |
1429 | ||
d8d2416d FD |
1430 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1431 | struct lttng_event_notifier_group *event_notifier_group, | |
1432 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1433 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1434 | { |
1435 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1436 | ||
1437 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1438 | if (!event_notifier_enabler) | |
1439 | return NULL; | |
1440 | event_notifier_enabler->base.format_type = format_type; | |
1441 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1442 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1443 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1444 | ||
1445 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1446 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1447 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1448 | |
1449 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1450 | event_notifier_param->event.name, | |
1451 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1452 | event_notifier_enabler->base.event_param.instrumentation = | |
1453 | event_notifier_param->event.instrumentation; | |
1454 | event_notifier_enabler->base.event_param.loglevel = | |
1455 | event_notifier_param->event.loglevel; | |
1456 | event_notifier_enabler->base.event_param.loglevel_type = | |
1457 | event_notifier_param->event.loglevel_type; | |
1458 | ||
1459 | event_notifier_enabler->base.enabled = 0; | |
1460 | event_notifier_enabler->group = event_notifier_group; | |
1461 | ||
1462 | cds_list_add(&event_notifier_enabler->node, | |
1463 | &event_notifier_group->enablers_head); | |
1464 | ||
1465 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1466 | ||
1467 | return event_notifier_enabler; | |
1468 | } | |
1469 | ||
d871c65b | 1470 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1471 | { |
d871c65b | 1472 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1473 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1474 | |
e58095ef | 1475 | return 0; |
457a6b58 | 1476 | } |
457a6b58 | 1477 | |
d871c65b | 1478 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1479 | { |
d871c65b | 1480 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1481 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1482 | |
e58095ef MD |
1483 | return 0; |
1484 | } | |
457a6b58 | 1485 | |
d871c65b | 1486 | static |
a56fd376 | 1487 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1488 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1489 | { |
ab89263e MD |
1490 | (*bytecode)->enabler = enabler; |
1491 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1492 | /* Take ownership of bytecode */ | |
1493 | *bytecode = NULL; | |
d871c65b FD |
1494 | } |
1495 | ||
a56fd376 | 1496 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1497 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1498 | { |
a56fd376 | 1499 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1500 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1501 | ||
e7bc0ef6 | 1502 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1503 | return 0; |
0bfb5cbd JI |
1504 | } |
1505 | ||
d871c65b FD |
1506 | static |
1507 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1508 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1509 | { |
e9fe6aad MD |
1510 | (*excluder)->enabler = enabler; |
1511 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1512 | /* Take ownership of excluder */ | |
1513 | *excluder = NULL; | |
d871c65b FD |
1514 | } |
1515 | ||
1516 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1517 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1518 | { |
1519 | _lttng_enabler_attach_exclusion( | |
1520 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1521 | ||
e7bc0ef6 | 1522 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1523 | return 0; |
e58095ef | 1524 | } |
f488575f | 1525 | |
d8d2416d FD |
1526 | int lttng_event_notifier_enabler_enable( |
1527 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1528 | { | |
1529 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1530 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1531 | ||
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | int lttng_event_notifier_enabler_disable( | |
1536 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1537 | { | |
1538 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1539 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1540 | ||
1541 | return 0; | |
1542 | } | |
1543 | ||
a56fd376 | 1544 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1545 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1546 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1547 | { |
a56fd376 | 1548 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1549 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1550 | bytecode); | |
1551 | ||
1552 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
d37ecb3f FD |
1556 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1557 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1558 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1559 | { |
49cde654 | 1560 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1561 | event_notifier_enabler); |
49cde654 | 1562 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1563 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1564 | /* Take ownership of bytecode */ |
1565 | *bytecode = NULL; | |
d37ecb3f FD |
1566 | event_notifier_enabler->num_captures++; |
1567 | ||
1568 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1569 | return 0; | |
1570 | } | |
1571 | ||
d8d2416d FD |
1572 | int lttng_event_notifier_enabler_attach_exclusion( |
1573 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1574 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1575 | { |
1576 | _lttng_enabler_attach_exclusion( | |
1577 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1578 | excluder); | |
1579 | ||
1580 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1581 | return 0; | |
1582 | } | |
1583 | ||
fd17d7ce MD |
1584 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1585 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1586 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1587 | { |
457a6b58 | 1588 | /* |
e58095ef MD |
1589 | * We cannot attach a context after trace has been started for a |
1590 | * session because the metadata does not allow expressing this | |
1591 | * information outside of the original channel scope. | |
457a6b58 | 1592 | */ |
bdb12629 | 1593 | if (session->priv->been_active) |
e58095ef | 1594 | return -EPERM; |
457a6b58 | 1595 | |
e58095ef | 1596 | switch (context_param->ctx) { |
fd17d7ce | 1597 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1598 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1599 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1600 | { |
fd17d7ce | 1601 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1602 | |
1603 | perf_ctx_param = &context_param->u.perf_counter; | |
1604 | return lttng_add_perf_counter_to_ctx( | |
1605 | perf_ctx_param->type, | |
1606 | perf_ctx_param->config, | |
1607 | perf_ctx_param->name, | |
1608 | ctx); | |
1609 | } | |
fd17d7ce | 1610 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1611 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1612 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1613 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1614 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1615 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1616 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1617 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1618 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1619 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1620 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1621 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1622 | ctx); | |
fd17d7ce | 1623 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1624 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1625 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1626 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1627 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1628 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1629 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1630 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1631 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1632 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1633 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1634 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1635 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1636 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1637 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1638 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1639 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1640 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1641 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1642 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1643 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1644 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1645 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1646 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1647 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1648 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1649 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1650 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1651 | default: |
1652 | return -EINVAL; | |
457a6b58 | 1653 | } |
457a6b58 MD |
1654 | } |
1655 | ||
d871c65b | 1656 | int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler, |
fd17d7ce | 1657 | struct lttng_ust_abi_context *context_param) |
457a6b58 | 1658 | { |
e58095ef | 1659 | return -ENOSYS; |
457a6b58 MD |
1660 | } |
1661 | ||
d871c65b | 1662 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1663 | { |
d871c65b FD |
1664 | if (!event_enabler) { |
1665 | return; | |
0f63324a | 1666 | } |
d871c65b | 1667 | cds_list_del(&event_enabler->node); |
0f63324a | 1668 | |
d871c65b | 1669 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1670 | |
d871c65b FD |
1671 | lttng_destroy_context(event_enabler->ctx); |
1672 | free(event_enabler); | |
457a6b58 MD |
1673 | } |
1674 | ||
e58095ef | 1675 | /* |
d871c65b | 1676 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1677 | * session. |
1678 | */ | |
457a6b58 | 1679 | static |
f69fe5fb | 1680 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1681 | { |
d871c65b | 1682 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1683 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1684 | |
bdb12629 | 1685 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1686 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1687 | /* |
1688 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1689 | * and its channel and session transient states are enabled, we |
1690 | * enable the event, else we disable it. | |
e58095ef | 1691 | */ |
2e70391c | 1692 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1693 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1694 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1695 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1696 | int nr_filters = 0; | |
e58095ef MD |
1697 | |
1698 | /* Enable events */ | |
1699 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1700 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1701 | if (enabler_ref->ref->enabled) { |
1702 | enabled = 1; | |
1703 | break; | |
1704 | } | |
1705 | } | |
ac6b4ac6 MD |
1706 | /* |
1707 | * Enabled state is based on union of enablers, with | |
1708 | * intesection of session and channel transient enable | |
1709 | * states. | |
1710 | */ | |
e7bc0ef6 | 1711 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1712 | |
2e70391c | 1713 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1714 | /* |
1715 | * Sync tracepoint registration with event enabled | |
1716 | * state. | |
1717 | */ | |
1718 | if (enabled) { | |
2e70391c | 1719 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1720 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1721 | } else { |
2e70391c | 1722 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1723 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1724 | } |
457a6b58 | 1725 | |
1f49fc05 | 1726 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1727 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1728 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1729 | if (enabler_ref->ref->enabled |
1730 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1731 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1732 | break; |
1733 | } | |
1734 | } | |
a2e4d05e MD |
1735 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1736 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1737 | |
e58095ef MD |
1738 | /* Enable filters */ |
1739 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1740 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1741 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1742 | nr_filters++; |
457a6b58 | 1743 | } |
a2e4d05e MD |
1744 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1745 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1746 | } |
d10a2205 | 1747 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1748 | } |
1749 | ||
4296085e MD |
1750 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1751 | static | |
dc11f93f | 1752 | bool lttng_ust_probe_supports_event_notifier(struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1753 | { |
1754 | return probe_desc->major >= 2; | |
1755 | } | |
1756 | ||
d8d2416d FD |
1757 | static |
1758 | void lttng_create_event_notifier_if_missing( | |
1759 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1760 | { | |
1761 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
dc11f93f | 1762 | struct lttng_ust_probe_desc *probe_desc; |
d8d2416d FD |
1763 | struct cds_list_head *probe_list; |
1764 | int i; | |
1765 | ||
1766 | probe_list = lttng_get_probe_list_head(); | |
1767 | ||
1768 | cds_list_for_each_entry(probe_desc, probe_list, head) { | |
1769 | for (i = 0; i < probe_desc->nr_events; i++) { | |
1770 | int ret; | |
1771 | bool found = false; | |
a084756d | 1772 | struct lttng_ust_event_desc *desc; |
115db533 | 1773 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1774 | struct cds_hlist_head *head; |
1775 | struct cds_hlist_node *node; | |
1776 | ||
1777 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1778 | |
d8d2416d FD |
1779 | if (!lttng_desc_match_enabler(desc, |
1780 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1781 | continue; | |
1782 | ||
1783 | /* | |
1784 | * Given the current event_notifier group, get the bucket that | |
1785 | * the target event_notifier would be if it was already | |
1786 | * created. | |
1787 | */ | |
1788 | head = borrow_hash_table_bucket( | |
1789 | event_notifier_group->event_notifiers_ht.table, | |
1790 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1791 | ||
115db533 | 1792 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1793 | /* |
1794 | * Check if event_notifier already exists by checking | |
1795 | * if the event_notifier and enabler share the same | |
1796 | * description and id. | |
1797 | */ | |
115db533 MD |
1798 | if (event_notifier_priv->parent.desc == desc && |
1799 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1800 | found = true; |
1801 | break; | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | if (found) | |
1806 | continue; | |
1807 | ||
4296085e MD |
1808 | /* Check that the probe supports event notifiers, else report the error. */ |
1809 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
5b4c6da4 | 1810 | ERR("Probe \"%s\" contains event \"%s:%s\" which matches an enabled event notifier, " |
4296085e MD |
1811 | "but its version (%u.%u) is too old and does not implement event notifiers. " |
1812 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1813 | "this event will not generate any notification.", | |
5b4c6da4 MD |
1814 | probe_desc->provider_name, |
1815 | probe_desc->provider_name, desc->event_name, | |
4296085e MD |
1816 | probe_desc->major, |
1817 | probe_desc->minor); | |
1818 | continue; | |
1819 | } | |
d8d2416d FD |
1820 | /* |
1821 | * We need to create a event_notifier for this event probe. | |
1822 | */ | |
1823 | ret = lttng_event_notifier_create(desc, | |
1824 | event_notifier_enabler->user_token, | |
6566528b | 1825 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1826 | event_notifier_group); |
1827 | if (ret) { | |
5b4c6da4 MD |
1828 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1829 | probe_desc->provider_name, | |
1830 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1831 | } |
1832 | } | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1838 | */ | |
1839 | static | |
1840 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1841 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1842 | { | |
1843 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1844 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1845 | |
1846 | /* | |
1847 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1848 | * might still be attaching filter or exclusion to the | |
1849 | * event_notifier_enabler. | |
1850 | */ | |
1851 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1852 | goto end; | |
1853 | ||
1854 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1855 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1856 | ||
1857 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1858 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1859 | struct lttng_enabler_ref *enabler_ref; |
1860 | ||
115db533 | 1861 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1862 | continue; |
1863 | ||
115db533 | 1864 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1865 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1866 | if (!enabler_ref) { | |
1867 | /* | |
1868 | * If no backward ref, create it. | |
1869 | * Add backward ref from event_notifier to enabler. | |
1870 | */ | |
1871 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1872 | if (!enabler_ref) | |
1873 | return -ENOMEM; | |
1874 | ||
1875 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1876 | event_notifier_enabler); | |
1877 | cds_list_add(&enabler_ref->node, | |
115db533 | 1878 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1879 | } |
1880 | ||
1881 | /* | |
1882 | * Link filter bytecodes if not linked yet. | |
1883 | */ | |
115db533 | 1884 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1885 | &event_notifier_group->ctx, |
a2e4d05e | 1886 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1887 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1888 | |
1889 | /* | |
1890 | * Link capture bytecodes if not linked yet. | |
1891 | */ | |
115db533 | 1892 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1893 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1894 | &event_notifier_enabler->capture_bytecode_head); |
1895 | ||
115db533 | 1896 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1897 | } |
1898 | end: | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | static | |
1903 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1904 | { | |
1905 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1906 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1907 | |
1908 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1909 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1910 | ||
1911 | /* | |
1912 | * For each event_notifier, if at least one of its enablers is enabled, | |
1913 | * we enable the event_notifier, else we disable it. | |
1914 | */ | |
115db533 | 1915 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1916 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1917 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1918 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1919 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1920 | |
1921 | /* Enable event_notifiers */ | |
1922 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1923 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1924 | if (enabler_ref->ref->enabled) { |
1925 | enabled = 1; | |
1926 | break; | |
1927 | } | |
1928 | } | |
1929 | ||
115db533 | 1930 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1931 | /* |
1932 | * Sync tracepoint registration with event_notifier enabled | |
1933 | * state. | |
1934 | */ | |
1935 | if (enabled) { | |
115db533 | 1936 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1937 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1938 | } else { |
115db533 | 1939 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1940 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1941 | } |
1942 | ||
1943 | /* Check if has enablers without bytecode enabled */ | |
1944 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1945 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1946 | if (enabler_ref->ref->enabled |
1947 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1948 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1949 | break; |
1950 | } | |
1951 | } | |
a2e4d05e MD |
1952 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1953 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1954 | |
1955 | /* Enable filters */ | |
1956 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1957 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1958 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1959 | nr_filters++; |
d8d2416d | 1960 | } |
a2e4d05e MD |
1961 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1962 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1963 | |
1964 | /* Enable captures. */ | |
1965 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1966 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1967 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1968 | nr_captures++; |
d37ecb3f | 1969 | } |
a2e4d05e MD |
1970 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1971 | !!nr_captures); | |
d8d2416d | 1972 | } |
d10a2205 | 1973 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1974 | } |
1975 | ||
e58095ef MD |
1976 | /* |
1977 | * Apply enablers to session events, adding events to session if need | |
1978 | * be. It is required after each modification applied to an active | |
1979 | * session, and right before session "start". | |
1980 | * "lazy" sync means we only sync if required. | |
1981 | */ | |
1982 | static | |
f69fe5fb | 1983 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1984 | { |
e58095ef MD |
1985 | /* We can skip if session is not active */ |
1986 | if (!session->active) | |
1987 | return; | |
d871c65b | 1988 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1989 | } |
53569322 MD |
1990 | |
1991 | /* | |
1992 | * Update all sessions with the given app context. | |
1993 | * Called with ust lock held. | |
1994 | * This is invoked when an application context gets loaded/unloaded. It | |
1995 | * ensures the context callbacks are in sync with the application | |
1996 | * context (either app context callbacks, or dummy callbacks). | |
1997 | */ | |
1998 | void lttng_ust_context_set_session_provider(const char *name, | |
daacdbfc MD |
1999 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
2000 | void (*record)(struct lttng_ust_ctx_field *field, | |
53569322 | 2001 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2002 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
2003 | void (*get_value)(struct lttng_ust_ctx_field *field, |
2004 | struct lttng_ust_ctx_value *value)) | |
53569322 | 2005 | { |
bdb12629 | 2006 | struct lttng_ust_session_private *session_priv; |
53569322 | 2007 | |
bdb12629 | 2008 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2009 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2010 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2011 | int ret; |
2012 | ||
bdb12629 | 2013 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
53569322 MD |
2014 | name, get_size, record, get_value); |
2015 | if (ret) | |
2016 | abort(); | |
bdb12629 | 2017 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2018 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
53569322 MD |
2019 | name, get_size, record, get_value); |
2020 | if (ret) | |
2021 | abort(); | |
2022 | } | |
2e70391c | 2023 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2024 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
53569322 MD |
2025 | name, get_size, record, get_value); |
2026 | if (ret) | |
2027 | abort(); | |
2028 | } | |
2029 | } | |
2030 | } | |
d8d2416d FD |
2031 | |
2032 | /* | |
2033 | * Update all event_notifier groups with the given app context. | |
2034 | * Called with ust lock held. | |
2035 | * This is invoked when an application context gets loaded/unloaded. It | |
2036 | * ensures the context callbacks are in sync with the application | |
2037 | * context (either app context callbacks, or dummy callbacks). | |
2038 | */ | |
2039 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
daacdbfc MD |
2040 | size_t (*get_size)(struct lttng_ust_ctx_field *field, size_t offset), |
2041 | void (*record)(struct lttng_ust_ctx_field *field, | |
d8d2416d | 2042 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2043 | struct lttng_ust_channel_buffer *chan), |
daacdbfc MD |
2044 | void (*get_value)(struct lttng_ust_ctx_field *field, |
2045 | struct lttng_ust_ctx_value *value)) | |
d8d2416d FD |
2046 | { |
2047 | struct lttng_event_notifier_group *event_notifier_group; | |
2048 | ||
2049 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2050 | int ret; | |
2051 | ||
2052 | ret = lttng_ust_context_set_provider_rcu( | |
2053 | &event_notifier_group->ctx, | |
2054 | name, get_size, record, get_value); | |
2055 | if (ret) | |
2056 | abort(); | |
2057 | } | |
2058 | } | |
9daacd1a MD |
2059 | |
2060 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2061 | unsigned char *uuid) | |
2062 | { | |
2063 | if (!session) | |
2064 | return 0; | |
2065 | /* Compare UUID with session. */ | |
2066 | if (session->priv->uuid_set) { | |
2067 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2068 | return -1; | |
2069 | } | |
2070 | } else { | |
2071 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2072 | session->priv->uuid_set = true; | |
2073 | } | |
2074 | return 0; | |
2075 | ||
2076 | } |