Commit | Line | Data |
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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8020ceb5 | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * Holds LTTng per-session event registry. |
8020ceb5 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b5234c06 | 10 | #include <stdio.h> |
d8d2416d | 11 | #include <assert.h> |
b5234c06 | 12 | #include <errno.h> |
d8d2416d FD |
13 | #include <limits.h> |
14 | #include <pthread.h> | |
f4681817 MD |
15 | #include <sys/shm.h> |
16 | #include <sys/ipc.h> | |
44c72f10 MD |
17 | #include <stdint.h> |
18 | #include <stddef.h> | |
28b12049 MD |
19 | #include <inttypes.h> |
20 | #include <time.h> | |
196ec2df | 21 | #include <stdbool.h> |
d8d2416d | 22 | #include <unistd.h> |
10544ee8 | 23 | #include <dlfcn.h> |
2ae57758 | 24 | #include <lttng/ust-endian.h> |
44c72f10 | 25 | |
d8d2416d | 26 | #include <urcu/arch.h> |
44c72f10 | 27 | #include <urcu/compiler.h> |
d8d2416d FD |
28 | #include <urcu/hlist.h> |
29 | #include <urcu/list.h> | |
44c72f10 | 30 | #include <urcu/uatomic.h> |
44c72f10 MD |
31 | |
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 | 34 | |
9d315d6d MJ |
35 | #include "common/logging.h" |
36 | #include "common/macros.h" | |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
38 | #include "common/ustcomm.h" |
39 | #include "common/ust-fd.h" | |
40 | #include "common/dynamic-type.h" | |
41 | #include "common/ust-context-provider.h" | |
44c72f10 | 42 | |
8f51c684 | 43 | #include "common/tracepoint.h" |
b8aa6f43 | 44 | #include "common/strutils.h" |
4d451c15 | 45 | #include "lttng-bytecode.h" |
8cd08025 | 46 | #include "common/tracer.h" |
7dd08bec | 47 | #include "lttng-tracer-core.h" |
cf73e0fe | 48 | #include "lttng-ust-statedump.h" |
51f804ec | 49 | #include "context-internal.h" |
36c52fff | 50 | #include "lib/lttng-ust/events.h" |
e4db8f98 MJ |
51 | #include "common/ringbuffer/shm.h" |
52 | #include "common/ringbuffer/frontend_types.h" | |
53 | #include "common/ringbuffer/frontend.h" | |
cdff92e0 | 54 | #include "common/counter/counter.h" |
e58e5ad5 | 55 | #include "common/jhash.h" |
d8d2416d | 56 | #include <lttng/ust-abi.h> |
4b4a1337 | 57 | #include "context-provider-internal.h" |
8165c8da MD |
58 | |
59 | /* | |
3327ac33 MD |
60 | * All operations within this file are called by the communication |
61 | * thread, under ust_lock protection. | |
8165c8da | 62 | */ |
8165c8da | 63 | |
b5234c06 | 64 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 65 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 66 | |
7753d283 | 67 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
68 | { |
69 | return &sessions; | |
70 | } | |
71 | ||
ba99fbe2 | 72 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 73 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 74 | |
e58095ef | 75 | static |
f69fe5fb | 76 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 77 | static |
f69fe5fb | 78 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 79 | static |
d8d2416d FD |
80 | void lttng_event_notifier_group_sync_enablers( |
81 | struct lttng_event_notifier_group *event_notifier_group); | |
82 | static | |
e58095ef MD |
83 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
84 | ||
5b4c6da4 MD |
85 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
86 | { | |
87 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
88 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
89 | return false; | |
90 | return true; | |
91 | } | |
92 | ||
93 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
94 | char *name) | |
95 | { | |
96 | strcpy(name, desc->probe_desc->provider_name); | |
97 | strcat(name, ":"); | |
98 | strcat(name, desc->event_name); | |
99 | } | |
100 | ||
6715d7d1 MD |
101 | /* |
102 | * Called with ust lock held. | |
103 | */ | |
104 | int lttng_session_active(void) | |
105 | { | |
bdb12629 | 106 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
107 | |
108 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 109 | if (iter->pub->active) |
6715d7d1 MD |
110 | return 1; |
111 | } | |
112 | return 0; | |
113 | } | |
114 | ||
e58095ef MD |
115 | static |
116 | int lttng_loglevel_match(int loglevel, | |
117 | unsigned int has_loglevel, | |
fd17d7ce | 118 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
119 | int req_loglevel) |
120 | { | |
e58095ef | 121 | if (!has_loglevel) |
612e9ce4 | 122 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
457a6b58 | 123 | switch (req_type) { |
fd17d7ce | 124 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 125 | if (loglevel <= req_loglevel |
612e9ce4 | 126 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
127 | return 1; |
128 | else | |
129 | return 0; | |
fd17d7ce | 130 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 131 | if (loglevel == req_loglevel |
612e9ce4 | 132 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
133 | return 1; |
134 | else | |
135 | return 0; | |
fd17d7ce | 136 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 137 | default: |
612e9ce4 | 138 | if (loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG) |
aacb3774 MD |
139 | return 1; |
140 | else | |
141 | return 0; | |
457a6b58 MD |
142 | } |
143 | } | |
144 | ||
f69fe5fb | 145 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 146 | { |
f69fe5fb | 147 | struct lttng_ust_session *session; |
bdb12629 | 148 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 149 | int i; |
8020ceb5 | 150 | |
f69fe5fb | 151 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
152 | if (!session) |
153 | return NULL; | |
f69fe5fb | 154 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
155 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
156 | if (!session_priv) { | |
53569322 MD |
157 | free(session); |
158 | return NULL; | |
159 | } | |
bdb12629 MD |
160 | session->priv = session_priv; |
161 | session_priv->pub = session; | |
162 | if (lttng_context_init_all(&session->priv->ctx)) { | |
163 | free(session_priv); | |
164 | free(session); | |
165 | return NULL; | |
166 | } | |
167 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
168 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
169 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
170 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 171 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 172 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 173 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
174 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
175 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
176 | return session; |
177 | } | |
178 | ||
ebabbf58 MD |
179 | struct lttng_counter *lttng_ust_counter_create( |
180 | const char *counter_transport_name, | |
181 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
182 | { | |
183 | struct lttng_counter_transport *counter_transport = NULL; | |
184 | struct lttng_counter *counter = NULL; | |
185 | ||
186 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
187 | if (!counter_transport) | |
188 | goto notransport; | |
189 | counter = zmalloc(sizeof(struct lttng_counter)); | |
190 | if (!counter) | |
191 | goto nomem; | |
192 | ||
193 | counter->ops = &counter_transport->ops; | |
194 | counter->transport = counter_transport; | |
195 | ||
196 | counter->counter = counter->ops->counter_create( | |
197 | number_dimensions, dimensions, 0, | |
198 | -1, 0, NULL, false); | |
199 | if (!counter->counter) { | |
200 | goto create_error; | |
201 | } | |
202 | ||
203 | return counter; | |
204 | ||
205 | create_error: | |
206 | free(counter); | |
207 | nomem: | |
208 | notransport: | |
209 | return NULL; | |
210 | } | |
211 | ||
212 | static | |
213 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
214 | { | |
215 | counter->ops->counter_destroy(counter->counter); | |
216 | free(counter); | |
217 | } | |
218 | ||
d8d2416d FD |
219 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
220 | { | |
221 | struct lttng_event_notifier_group *event_notifier_group; | |
222 | int i; | |
223 | ||
224 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
225 | if (!event_notifier_group) | |
226 | return NULL; | |
227 | ||
51f804ec FD |
228 | /* Add all contexts. */ |
229 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
230 | free(event_notifier_group); | |
231 | return NULL; | |
232 | } | |
233 | ||
d8d2416d FD |
234 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
235 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
236 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
237 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
238 | ||
239 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
240 | ||
241 | return event_notifier_group; | |
242 | } | |
243 | ||
74d81a6c MD |
244 | /* |
245 | * Only used internally at session destruction. | |
246 | */ | |
247 | static | |
e7bc0ef6 | 248 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 249 | { |
b5457df5 | 250 | struct lttng_ust_ring_buffer_channel *chan; |
74d81a6c MD |
251 | struct lttng_ust_shm_handle *handle; |
252 | ||
e7bc0ef6 | 253 | cds_list_del(<tng_chan->priv->node); |
0950190a | 254 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 255 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 256 | handle = chan->handle; |
74d81a6c | 257 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
258 | free(lttng_chan->parent); |
259 | free(lttng_chan->priv); | |
f0fde1c3 | 260 | free(lttng_chan); |
74d81a6c MD |
261 | } |
262 | ||
ac6b4ac6 | 263 | static |
ba99fbe2 | 264 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
265 | { |
266 | int ret; | |
4e48b5d2 | 267 | const struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 268 | |
ba99fbe2 MD |
269 | assert(event->priv->registered == 0); |
270 | desc = event->priv->desc; | |
34f7f142 MD |
271 | ret = lttng_ust_tp_probe_register_queue_release(desc->probe_desc->provider_name, |
272 | desc->event_name, | |
5b675300 MD |
273 | desc->tp_class->probe_callback, |
274 | event, desc->tp_class->signature); | |
ac6b4ac6 MD |
275 | WARN_ON_ONCE(ret); |
276 | if (!ret) | |
ba99fbe2 | 277 | event->priv->registered = 1; |
ac6b4ac6 MD |
278 | } |
279 | ||
d8d2416d | 280 | static |
ba99fbe2 | 281 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
282 | { |
283 | int ret; | |
4e48b5d2 | 284 | const struct lttng_ust_event_desc *desc; |
d8d2416d | 285 | |
ba99fbe2 MD |
286 | assert(event->priv->registered == 1); |
287 | desc = event->priv->desc; | |
34f7f142 MD |
288 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->probe_desc->provider_name, |
289 | desc->event_name, | |
5b675300 | 290 | desc->tp_class->probe_callback, |
ba99fbe2 | 291 | event); |
ac6b4ac6 MD |
292 | WARN_ON_ONCE(ret); |
293 | if (!ret) | |
ba99fbe2 | 294 | event->priv->registered = 0; |
ac6b4ac6 MD |
295 | } |
296 | ||
d8d2416d | 297 | static |
ba99fbe2 | 298 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 299 | { |
ba99fbe2 MD |
300 | if (event->priv->registered) |
301 | unregister_event(event); | |
d8d2416d FD |
302 | } |
303 | ||
f69fe5fb | 304 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 305 | { |
e7bc0ef6 | 306 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 307 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 308 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 309 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 310 | |
b5234c06 | 311 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 312 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 313 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 314 | } |
b653ddc1 | 315 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 316 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 317 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 318 | &session->priv->enablers_head, node) |
d871c65b | 319 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 320 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 321 | &session->priv->events_head, node) |
ba99fbe2 | 322 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 323 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 324 | &session->priv->enums_head, node) |
c785c634 | 325 | _lttng_enum_destroy(_enum); |
bdb12629 | 326 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 327 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
328 | cds_list_del(&session->priv->node); |
329 | lttng_destroy_context(session->priv->ctx); | |
330 | free(session->priv); | |
b5234c06 | 331 | free(session); |
8020ceb5 MD |
332 | } |
333 | ||
d8d2416d FD |
334 | void lttng_event_notifier_group_destroy( |
335 | struct lttng_event_notifier_group *event_notifier_group) | |
336 | { | |
337 | int close_ret; | |
338 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 339 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
340 | |
341 | if (!event_notifier_group) { | |
342 | return; | |
343 | } | |
344 | ||
ba99fbe2 | 345 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 346 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 347 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 348 | |
b653ddc1 | 349 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
350 | |
351 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
352 | &event_notifier_group->enablers_head, node) | |
353 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
354 | ||
ba99fbe2 | 355 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 356 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 357 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 358 | |
ebabbf58 MD |
359 | if (event_notifier_group->error_counter) |
360 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
361 | ||
362 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
363 | |
364 | lttng_ust_lock_fd_tracker(); | |
365 | close_ret = close(event_notifier_group->notification_fd); | |
366 | if (!close_ret) { | |
367 | lttng_ust_delete_fd_from_tracker( | |
368 | event_notifier_group->notification_fd); | |
369 | } else { | |
370 | PERROR("close"); | |
371 | abort(); | |
372 | } | |
373 | lttng_ust_unlock_fd_tracker(); | |
374 | ||
375 | cds_list_del(&event_notifier_group->node); | |
bd515d28 | 376 | lttng_destroy_context(event_notifier_group->ctx); |
d8d2416d FD |
377 | free(event_notifier_group); |
378 | } | |
379 | ||
d871c65b FD |
380 | static |
381 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
382 | { | |
ab249ecf | 383 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
384 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
385 | ||
386 | if (!enabler) { | |
387 | return; | |
388 | } | |
389 | ||
390 | /* Destroy filter bytecode */ | |
391 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
392 | &enabler->filter_bytecode_head, node) { | |
393 | free(filter_node); | |
394 | } | |
395 | ||
396 | /* Destroy excluders */ | |
397 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
398 | &enabler->excluder_head, node) { | |
399 | free(excluder_node); | |
400 | } | |
401 | } | |
402 | ||
d8d2416d FD |
403 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
404 | { | |
405 | if (!event_notifier_enabler) { | |
406 | return; | |
407 | } | |
408 | ||
409 | cds_list_del(&event_notifier_enabler->node); | |
410 | ||
411 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
412 | ||
413 | free(event_notifier_enabler); | |
414 | } | |
415 | ||
53569322 | 416 | static |
4e48b5d2 | 417 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 418 | struct lttng_ust_session *session) |
53569322 MD |
419 | { |
420 | const char *enum_name = desc->name; | |
421 | struct lttng_enum *_enum; | |
422 | struct cds_hlist_head *head; | |
53569322 MD |
423 | int ret = 0; |
424 | size_t name_len = strlen(enum_name); | |
425 | uint32_t hash; | |
426 | int notify_socket; | |
427 | ||
b33b46f7 | 428 | /* Check if this enum is already registered for this session. */ |
53569322 | 429 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 430 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
431 | |
432 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
433 | if (_enum) { | |
434 | ret = -EEXIST; | |
435 | goto exist; | |
53569322 MD |
436 | } |
437 | ||
bdb12629 | 438 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
439 | if (notify_socket < 0) { |
440 | ret = notify_socket; | |
441 | goto socket_error; | |
442 | } | |
443 | ||
444 | _enum = zmalloc(sizeof(*_enum)); | |
445 | if (!_enum) { | |
446 | ret = -ENOMEM; | |
447 | goto cache_error; | |
448 | } | |
449 | _enum->session = session; | |
450 | _enum->desc = desc; | |
451 | ||
452 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 453 | session->priv->objd, |
53569322 MD |
454 | enum_name, |
455 | desc->nr_entries, | |
456 | desc->entries, | |
457 | &_enum->id); | |
458 | if (ret < 0) { | |
459 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
460 | goto sessiond_register_error; | |
461 | } | |
bdb12629 | 462 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
463 | cds_hlist_add_head(&_enum->hlist, head); |
464 | return 0; | |
465 | ||
466 | sessiond_register_error: | |
467 | free(_enum); | |
468 | cache_error: | |
469 | socket_error: | |
470 | exist: | |
471 | return ret; | |
472 | } | |
473 | ||
474 | static | |
4e48b5d2 | 475 | int lttng_create_enum_check(const struct lttng_ust_type_common *type, |
f69fe5fb | 476 | struct lttng_ust_session *session) |
53569322 | 477 | { |
a084756d MD |
478 | switch (type->type) { |
479 | case lttng_ust_type_enum: | |
218deb69 | 480 | { |
4e48b5d2 | 481 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
482 | int ret; |
483 | ||
a084756d | 484 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
485 | ret = lttng_enum_create(enum_desc, session); |
486 | if (ret && ret != -EEXIST) { | |
487 | DBG("Unable to create enum error: (%d)", ret); | |
488 | return ret; | |
489 | } | |
490 | break; | |
491 | } | |
a084756d | 492 | case lttng_ust_type_dynamic: |
53569322 | 493 | { |
4e48b5d2 MD |
494 | const struct lttng_ust_event_field *tag_field_generic; |
495 | const struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
496 | int ret; |
497 | ||
498 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 499 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
500 | ret = lttng_enum_create(enum_desc, session); |
501 | if (ret && ret != -EEXIST) { | |
502 | DBG("Unable to create enum error: (%d)", ret); | |
503 | return ret; | |
504 | } | |
505 | break; | |
506 | } | |
507 | default: | |
508 | /* TODO: nested types when they become supported. */ | |
509 | break; | |
510 | } | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static | |
515 | int lttng_create_all_event_enums(size_t nr_fields, | |
3d33ca1d | 516 | const struct lttng_ust_event_field * const *event_fields, |
f69fe5fb | 517 | struct lttng_ust_session *session) |
53569322 MD |
518 | { |
519 | size_t i; | |
520 | int ret; | |
521 | ||
522 | /* For each field, ensure enum is part of the session. */ | |
523 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 524 | const struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
525 | |
526 | ret = lttng_create_enum_check(type, session); | |
527 | if (ret) | |
528 | return ret; | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | ||
533 | static | |
534 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
4e48b5d2 | 535 | struct lttng_ust_ctx_field *ctx_fields, |
f69fe5fb | 536 | struct lttng_ust_session *session) |
53569322 MD |
537 | { |
538 | size_t i; | |
539 | int ret; | |
540 | ||
541 | /* For each field, ensure enum is part of the session. */ | |
542 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 543 | const struct lttng_ust_type_common *type = ctx_fields[i].event_field->type; |
53569322 MD |
544 | |
545 | ret = lttng_create_enum_check(type, session); | |
546 | if (ret) | |
547 | return ret; | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
710b8ee3 MD |
552 | /* |
553 | * Ensure that a state-dump will be performed for this session at the end | |
554 | * of the current handle_message(). | |
555 | */ | |
f69fe5fb | 556 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 557 | { |
bdb12629 MD |
558 | session->priv->statedump_pending = 1; |
559 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
560 | return 0; |
561 | } | |
53569322 | 562 | |
f69fe5fb | 563 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
564 | { |
565 | int ret = 0; | |
e7bc0ef6 | 566 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 567 | int notify_socket; |
8020ceb5 | 568 | |
8020ceb5 MD |
569 | if (session->active) { |
570 | ret = -EBUSY; | |
571 | goto end; | |
572 | } | |
573 | ||
bdb12629 | 574 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
575 | if (notify_socket < 0) |
576 | return notify_socket; | |
577 | ||
ac6b4ac6 | 578 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 579 | session->priv->tstate = 1; |
e58095ef | 580 | |
3ff7660f | 581 | /* We need to sync enablers with session before activation. */ |
d871c65b | 582 | lttng_session_sync_event_enablers(session); |
3ff7660f | 583 | |
8020ceb5 MD |
584 | /* |
585 | * Snapshot the number of events per channel to know the type of header | |
586 | * we need to use. | |
587 | */ | |
bdb12629 | 588 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 589 | struct lttng_ust_ctx *ctx; |
4e48b5d2 | 590 | struct lttng_ust_ctx_field *fields = NULL; |
32ce8569 | 591 | size_t nr_fields = 0; |
6ca18e66 | 592 | uint32_t chan_id; |
32ce8569 MD |
593 | |
594 | /* don't change it if session stop/restart */ | |
8020ceb5 | 595 | if (chan->header_type) |
32ce8569 | 596 | continue; |
0950190a | 597 | ctx = chan->ctx; |
32ce8569 MD |
598 | if (ctx) { |
599 | nr_fields = ctx->nr_fields; | |
83e43212 | 600 | fields = ctx->fields; |
53569322 MD |
601 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
602 | session); | |
603 | if (ret < 0) { | |
604 | DBG("Error (%d) adding enum to session", ret); | |
605 | return ret; | |
606 | } | |
32ce8569 MD |
607 | } |
608 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 609 | session, |
bdb12629 | 610 | session->priv->objd, |
e7bc0ef6 | 611 | chan->parent.objd, |
32ce8569 MD |
612 | nr_fields, |
613 | fields, | |
6ca18e66 | 614 | &chan_id, |
32ce8569 | 615 | &chan->header_type); |
b869b5ae MD |
616 | if (ret) { |
617 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 618 | return ret; |
b869b5ae | 619 | } |
6ca18e66 MD |
620 | if (chan_id != chan->id) { |
621 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
622 | chan_id, chan->id); | |
623 | return -EINVAL; | |
624 | } | |
8020ceb5 MD |
625 | } |
626 | ||
ac6b4ac6 | 627 | /* Set atomically the state to "active" */ |
b5234c06 | 628 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 629 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 630 | |
710b8ee3 MD |
631 | ret = lttng_session_statedump(session); |
632 | if (ret) | |
633 | return ret; | |
8020ceb5 | 634 | end: |
8020ceb5 MD |
635 | return ret; |
636 | } | |
637 | ||
f69fe5fb | 638 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
639 | { |
640 | int ret = 0; | |
641 | ||
8020ceb5 MD |
642 | if (!session->active) { |
643 | ret = -EBUSY; | |
644 | goto end; | |
645 | } | |
ac6b4ac6 | 646 | /* Set atomically the state to "inactive" */ |
b5234c06 | 647 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
648 | |
649 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 650 | session->priv->tstate = 0; |
d871c65b | 651 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 652 | end: |
8020ceb5 MD |
653 | return ret; |
654 | } | |
655 | ||
e7bc0ef6 | 656 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 657 | { |
ac6b4ac6 | 658 | int ret = 0; |
976fe9ea | 659 | |
e7bc0ef6 | 660 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
661 | ret = -EBUSY; |
662 | goto end; | |
663 | } | |
664 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
665 | lttng_channel->priv->tstate = 1; |
666 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 667 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 668 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
669 | end: |
670 | return ret; | |
976fe9ea MD |
671 | } |
672 | ||
e7bc0ef6 | 673 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 674 | { |
ac6b4ac6 | 675 | int ret = 0; |
976fe9ea | 676 | |
e7bc0ef6 | 677 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
678 | ret = -EBUSY; |
679 | goto end; | |
680 | } | |
681 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 682 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 683 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
684 | lttng_channel->priv->tstate = 0; |
685 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
686 | end: |
687 | return ret; | |
976fe9ea MD |
688 | } |
689 | ||
fb470188 FD |
690 | static inline |
691 | struct cds_hlist_head *borrow_hash_table_bucket( | |
692 | struct cds_hlist_head *hash_table, | |
693 | unsigned int hash_table_size, | |
4e48b5d2 | 694 | const struct lttng_ust_event_desc *desc) |
fb470188 | 695 | { |
5b4c6da4 | 696 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
697 | size_t name_len; |
698 | uint32_t hash; | |
699 | ||
5b4c6da4 MD |
700 | lttng_ust_format_event_name(desc, name); |
701 | name_len = strlen(name); | |
fb470188 | 702 | |
5b4c6da4 | 703 | hash = jhash(name, name_len, 0); |
fb470188 FD |
704 | return &hash_table[hash & (hash_table_size - 1)]; |
705 | } | |
706 | ||
8020ceb5 MD |
707 | /* |
708 | * Supports event creation while tracing session is active. | |
709 | */ | |
e58095ef | 710 | static |
4e48b5d2 | 711 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 712 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 713 | { |
5b4c6da4 | 714 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
715 | struct lttng_ust_event_recorder *event_recorder; |
716 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 717 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 718 | struct cds_hlist_head *head; |
576599a0 | 719 | int ret = 0; |
32ce8569 MD |
720 | int notify_socket, loglevel; |
721 | const char *uri; | |
8020ceb5 | 722 | |
e7bc0ef6 | 723 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 724 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 725 | |
bdb12629 | 726 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
727 | if (notify_socket < 0) { |
728 | ret = notify_socket; | |
729 | goto socket_error; | |
730 | } | |
731 | ||
5b675300 | 732 | ret = lttng_create_all_event_enums(desc->tp_class->nr_fields, desc->tp_class->fields, |
53569322 | 733 | session); |
c785c634 MD |
734 | if (ret < 0) { |
735 | DBG("Error (%d) adding enum to session", ret); | |
736 | goto create_enum_error; | |
737 | } | |
738 | ||
457a6b58 MD |
739 | /* |
740 | * Check if loglevel match. Refuse to connect event if not. | |
741 | */ | |
2e70391c MD |
742 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
743 | if (!event_recorder) { | |
576599a0 | 744 | ret = -ENOMEM; |
8020ceb5 | 745 | goto cache_error; |
576599a0 | 746 | } |
2e70391c | 747 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 748 | |
7ee76145 | 749 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 750 | if (!event_recorder->parent) { |
80333dfa MD |
751 | ret = -ENOMEM; |
752 | goto parent_error; | |
753 | } | |
7ee76145 | 754 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 755 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 756 | event_recorder->parent->child = event_recorder; |
80333dfa | 757 | |
2e70391c MD |
758 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
759 | if (!event_recorder_priv) { | |
68bb7559 MD |
760 | ret = -ENOMEM; |
761 | goto priv_error; | |
762 | } | |
2e70391c MD |
763 | event_recorder->priv = event_recorder_priv; |
764 | event_recorder_priv->pub = event_recorder; | |
765 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
766 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 767 | |
2e70391c | 768 | event_recorder->chan = chan; |
e58095ef | 769 | |
ac6b4ac6 | 770 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 771 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
772 | event_recorder->parent->enabled = 0; |
773 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 774 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
775 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
776 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
777 | |
778 | if (desc->loglevel) | |
d7b6eb89 | 779 | loglevel = *(*desc->loglevel); |
32ce8569 | 780 | else |
612e9ce4 | 781 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
dc11f93f MD |
782 | if (desc->model_emf_uri) |
783 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
784 | else |
785 | uri = NULL; | |
786 | ||
5b4c6da4 MD |
787 | lttng_ust_format_event_name(desc, name); |
788 | ||
13b21cd6 MD |
789 | /* Fetch event ID from sessiond */ |
790 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 791 | session, |
bdb12629 | 792 | session->priv->objd, |
e7bc0ef6 | 793 | chan->priv->parent.objd, |
5b4c6da4 | 794 | name, |
13b21cd6 | 795 | loglevel, |
5b675300 MD |
796 | desc->tp_class->signature, |
797 | desc->tp_class->nr_fields, | |
798 | desc->tp_class->fields, | |
13b21cd6 | 799 | uri, |
8936b6c0 | 800 | &event_recorder->priv->id); |
13b21cd6 MD |
801 | if (ret < 0) { |
802 | DBG("Error (%d) registering event to sessiond", ret); | |
803 | goto sessiond_register_error; | |
32ce8569 | 804 | } |
2b213b16 | 805 | |
e7bc0ef6 | 806 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 807 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 808 | return 0; |
8020ceb5 | 809 | |
32ce8569 | 810 | sessiond_register_error: |
2e70391c | 811 | free(event_recorder_priv); |
68bb7559 | 812 | priv_error: |
2e70391c | 813 | free(event_recorder->parent); |
80333dfa | 814 | parent_error: |
2e70391c | 815 | free(event_recorder); |
8020ceb5 | 816 | cache_error: |
c785c634 | 817 | create_enum_error: |
32ce8569 | 818 | socket_error: |
576599a0 | 819 | return ret; |
8020ceb5 MD |
820 | } |
821 | ||
d8d2416d | 822 | static |
4e48b5d2 | 823 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 824 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
825 | struct lttng_event_notifier_group *event_notifier_group) |
826 | { | |
d7d45c0d | 827 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 828 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
829 | struct cds_hlist_head *head; |
830 | int ret = 0; | |
831 | ||
832 | /* | |
833 | * Get the hashtable bucket the created lttng_event_notifier object | |
834 | * should be inserted. | |
835 | */ | |
836 | head = borrow_hash_table_bucket( | |
837 | event_notifier_group->event_notifiers_ht.table, | |
838 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
839 | ||
d7d45c0d | 840 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
841 | if (!event_notifier) { |
842 | ret = -ENOMEM; | |
843 | goto error; | |
844 | } | |
d7d45c0d | 845 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 846 | |
115db533 MD |
847 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
848 | if (!event_notifier->parent) { | |
849 | ret = -ENOMEM; | |
850 | goto parent_error; | |
851 | } | |
852 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 853 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 854 | event_notifier->parent->child = event_notifier; |
115db533 MD |
855 | |
856 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
857 | if (!event_notifier_priv) { | |
858 | ret = -ENOMEM; | |
859 | goto priv_error; | |
860 | } | |
861 | event_notifier->priv = event_notifier_priv; | |
862 | event_notifier_priv->pub = event_notifier; | |
863 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
864 | event_notifier_priv->parent.pub = event_notifier->parent; | |
865 | ||
866 | event_notifier_priv->group = event_notifier_group; | |
867 | event_notifier_priv->parent.user_token = token; | |
868 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
869 | |
870 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 871 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
872 | event_notifier->parent->enabled = 0; |
873 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 874 | |
a2e4d05e MD |
875 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
876 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
877 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
878 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 879 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 880 | |
115db533 | 881 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 882 | &event_notifier_group->event_notifiers_head); |
115db533 | 883 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
884 | |
885 | return 0; | |
886 | ||
115db533 MD |
887 | priv_error: |
888 | free(event_notifier->parent); | |
889 | parent_error: | |
890 | free(event_notifier); | |
d8d2416d FD |
891 | error: |
892 | return ret; | |
893 | } | |
894 | ||
e58095ef | 895 | static |
4e48b5d2 | 896 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
897 | struct lttng_enabler *enabler) |
898 | { | |
5b4c6da4 | 899 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 900 | int loglevel = 0; |
7e2e405c | 901 | unsigned int has_loglevel = 0; |
e58095ef | 902 | |
5b4c6da4 | 903 | lttng_ust_format_event_name(desc, name); |
e450e339 | 904 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 905 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 906 | name, SIZE_MAX)) |
e58095ef MD |
907 | return 0; |
908 | if (desc->loglevel) { | |
909 | loglevel = *(*desc->loglevel); | |
910 | has_loglevel = 1; | |
911 | } | |
912 | if (!lttng_loglevel_match(loglevel, | |
913 | has_loglevel, | |
914 | enabler->event_param.loglevel_type, | |
915 | enabler->event_param.loglevel)) | |
916 | return 0; | |
917 | return 1; | |
918 | } | |
919 | ||
920 | static | |
4e48b5d2 | 921 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
922 | struct lttng_enabler *enabler) |
923 | { | |
5b4c6da4 | 924 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
925 | int loglevel = 0; |
926 | unsigned int has_loglevel = 0; | |
927 | ||
5b4c6da4 | 928 | lttng_ust_format_event_name(desc, name); |
e450e339 | 929 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 930 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
931 | return 0; |
932 | if (desc->loglevel) { | |
933 | loglevel = *(*desc->loglevel); | |
934 | has_loglevel = 1; | |
935 | } | |
936 | if (!lttng_loglevel_match(loglevel, | |
937 | has_loglevel, | |
938 | enabler->event_param.loglevel_type, | |
939 | enabler->event_param.loglevel)) | |
940 | return 0; | |
941 | return 1; | |
942 | } | |
943 | ||
944 | static | |
4e48b5d2 | 945 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
946 | struct lttng_enabler *enabler) |
947 | { | |
e450e339 FD |
948 | switch (enabler->format_type) { |
949 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
950 | { |
951 | struct lttng_ust_excluder_node *excluder; | |
952 | ||
953 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
954 | return 0; | |
955 | } | |
956 | ||
957 | /* | |
958 | * If the matching event matches with an excluder, | |
959 | * return 'does not match' | |
960 | */ | |
961 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
962 | int count; | |
963 | ||
964 | for (count = 0; count < excluder->excluder.count; count++) { | |
965 | int len; | |
966 | char *excluder_name; | |
967 | ||
968 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
969 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
970 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
971 | if (len > 0) { |
972 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
973 | ||
974 | lttng_ust_format_event_name(desc, name); | |
975 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
976 | return 0; | |
977 | } | |
978 | } | |
ed5b5bbd JI |
979 | } |
980 | } | |
196ec2df | 981 | return 1; |
ed5b5bbd | 982 | } |
e450e339 | 983 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
984 | return lttng_desc_match_event_enabler(desc, enabler); |
985 | default: | |
986 | return -EINVAL; | |
987 | } | |
988 | } | |
989 | ||
990 | static | |
d871c65b | 991 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 992 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 993 | { |
2e70391c | 994 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 995 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 996 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
997 | return 1; |
998 | else | |
999 | return 0; | |
e58095ef MD |
1000 | } |
1001 | ||
d8d2416d FD |
1002 | static |
1003 | int lttng_event_notifier_enabler_match_event_notifier( | |
1004 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1005 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1006 | { |
115db533 | 1007 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1008 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1009 | ||
115db533 MD |
1010 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1011 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1012 | return 1; |
1013 | else | |
1014 | return 0; | |
1015 | } | |
1016 | ||
e58095ef | 1017 | static |
d871c65b FD |
1018 | struct lttng_enabler_ref *lttng_enabler_ref( |
1019 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1020 | struct lttng_enabler *enabler) |
1021 | { | |
1022 | struct lttng_enabler_ref *enabler_ref; | |
1023 | ||
d871c65b | 1024 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1025 | if (enabler_ref->ref == enabler) |
1026 | return enabler_ref; | |
1027 | } | |
1028 | return NULL; | |
1029 | } | |
1030 | ||
8020ceb5 | 1031 | /* |
e58095ef MD |
1032 | * Create struct lttng_event if it is missing and present in the list of |
1033 | * tracepoint probes. | |
8020ceb5 | 1034 | */ |
e58095ef | 1035 | static |
ba99fbe2 | 1036 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1037 | { |
e7bc0ef6 | 1038 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
4e48b5d2 MD |
1039 | struct lttng_ust_registered_probe *reg_probe; |
1040 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1041 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1042 | int i; |
1043 | struct cds_list_head *probe_list; | |
1044 | ||
1045 | probe_list = lttng_get_probe_list_head(); | |
1046 | /* | |
1047 | * For each probe event, if we find that a probe event matches | |
1048 | * our enabler, create an associated lttng_event if not | |
1049 | * already present. | |
1050 | */ | |
4e48b5d2 MD |
1051 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1052 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1053 | ||
e58095ef | 1054 | for (i = 0; i < probe_desc->nr_events; i++) { |
98a97f24 FD |
1055 | int ret; |
1056 | bool found = false; | |
d56fa719 MD |
1057 | struct cds_hlist_head *head; |
1058 | struct cds_hlist_node *node; | |
e58095ef MD |
1059 | |
1060 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1061 | if (!lttng_desc_match_enabler(desc, |
1062 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1063 | continue; |
1064 | ||
fb470188 | 1065 | head = borrow_hash_table_bucket( |
bdb12629 | 1066 | session->priv->events_ht.table, |
fb470188 FD |
1067 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1068 | ||
2e70391c MD |
1069 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1070 | if (event_recorder_priv->parent.desc == desc | |
1071 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1072 | found = true; |
3140bffe FD |
1073 | break; |
1074 | } | |
e58095ef MD |
1075 | } |
1076 | if (found) | |
1077 | continue; | |
1078 | ||
1079 | /* | |
1080 | * We need to create an event for this | |
1081 | * event probe. | |
1082 | */ | |
2e70391c | 1083 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1084 | event_enabler->chan); |
e58095ef | 1085 | if (ret) { |
5b4c6da4 MD |
1086 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1087 | probe_desc->provider_name, | |
1088 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1089 | } |
8165c8da | 1090 | } |
8020ceb5 | 1091 | } |
8020ceb5 MD |
1092 | } |
1093 | ||
a44d07da | 1094 | static |
4e48b5d2 | 1095 | void probe_provider_event_for_each(const struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1096 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1097 | { |
1098 | struct cds_hlist_node *node, *tmp_node; | |
1099 | struct cds_list_head *sessionsp; | |
a44d07da | 1100 | unsigned int i; |
35ac38cb FD |
1101 | |
1102 | /* Get handle on list of sessions. */ | |
7753d283 | 1103 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1104 | |
1105 | /* | |
a44d07da FD |
1106 | * Iterate over all events in the probe provider descriptions and |
1107 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1108 | */ |
1109 | for (i = 0; i < provider_desc->nr_events; i++) { | |
4e48b5d2 | 1110 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1111 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1112 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1113 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1114 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1115 | struct cds_hlist_head *head; |
35ac38cb FD |
1116 | |
1117 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1118 | |
a44d07da FD |
1119 | /* |
1120 | * Iterate over all session to find the current event | |
1121 | * description. | |
1122 | */ | |
bdb12629 | 1123 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1124 | /* |
a44d07da FD |
1125 | * Get the list of events in the hashtable bucket and |
1126 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1127 | */ |
fb470188 | 1128 | head = borrow_hash_table_bucket( |
bdb12629 | 1129 | session_priv->events_ht.table, |
fb470188 FD |
1130 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1131 | ||
2e70391c MD |
1132 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1133 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1134 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1135 | break; |
1136 | } | |
1137 | } | |
1138 | } | |
d8d2416d FD |
1139 | |
1140 | /* | |
1141 | * Iterate over all event_notifier groups to find the current event | |
1142 | * description. | |
1143 | */ | |
1144 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1145 | /* | |
1146 | * Get the list of event_notifiers in the hashtable bucket and | |
1147 | * iterate to find the event_notifier matching this | |
1148 | * descriptor. | |
1149 | */ | |
1150 | head = borrow_hash_table_bucket( | |
1151 | event_notifier_group->event_notifiers_ht.table, | |
1152 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1153 | ||
115db533 MD |
1154 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1155 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1156 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1157 | break; |
1158 | } | |
1159 | } | |
1160 | } | |
35ac38cb | 1161 | } |
a44d07da FD |
1162 | } |
1163 | ||
1164 | static | |
ba99fbe2 | 1165 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1166 | { |
a44d07da | 1167 | |
ba99fbe2 MD |
1168 | switch (event->type) { |
1169 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1170 | { | |
1171 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1172 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1173 | unsigned int i; |
1174 | ||
1175 | /* Destroy enums of the current event. */ | |
5b675300 | 1176 | for (i = 0; i < event_recorder->parent->priv->desc->tp_class->nr_fields; i++) { |
4e48b5d2 MD |
1177 | const struct lttng_ust_enum_desc *enum_desc; |
1178 | const struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1179 | struct lttng_enum *curr_enum; |
1180 | ||
5b675300 | 1181 | field = event_recorder->parent->priv->desc->tp_class->fields[i]; |
a084756d MD |
1182 | switch (field->type->type) { |
1183 | case lttng_ust_type_enum: | |
1184 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1185 | break; |
1186 | default: | |
1187 | continue; | |
1188 | } | |
a44d07da | 1189 | |
ba99fbe2 MD |
1190 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1191 | if (curr_enum) { | |
1192 | _lttng_enum_destroy(curr_enum); | |
1193 | } | |
a44d07da | 1194 | } |
ba99fbe2 MD |
1195 | break; |
1196 | } | |
1197 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1198 | break; | |
1199 | default: | |
1200 | abort(); | |
a44d07da | 1201 | } |
a44d07da | 1202 | /* Destroy event. */ |
ba99fbe2 | 1203 | _lttng_event_destroy(event); |
a44d07da FD |
1204 | } |
1205 | ||
1206 | /* | |
1207 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1208 | * the probe provider descriptor received as argument. Must me called with the | |
1209 | * ust_lock held. | |
1210 | */ | |
1211 | void lttng_probe_provider_unregister_events( | |
4e48b5d2 | 1212 | const struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1213 | { |
1214 | /* | |
1215 | * Iterate over all events in the probe provider descriptions and sessions | |
1216 | * to queue the unregistration of the events. | |
1217 | */ | |
ba99fbe2 | 1218 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1219 | |
1220 | /* Wait for grace period. */ | |
b653ddc1 | 1221 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1222 | /* Prune the unregistration queue. */ |
d10a2205 | 1223 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1224 | |
1225 | /* | |
1226 | * It is now safe to destroy the events and remove them from the event list | |
1227 | * and hashtables. | |
1228 | */ | |
ba99fbe2 | 1229 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1230 | } |
1231 | ||
8020ceb5 | 1232 | /* |
d8d2416d | 1233 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1234 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1235 | */ |
1236 | static | |
ba99fbe2 | 1237 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1238 | { |
e7bc0ef6 | 1239 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1240 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1241 | |
d871c65b | 1242 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1243 | goto end; |
1244 | ||
e58095ef | 1245 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1246 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1247 | |
1248 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1249 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1250 | struct lttng_enabler_ref *enabler_ref; |
1251 | ||
2e70391c | 1252 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1253 | continue; |
1254 | ||
2e70391c | 1255 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1256 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1257 | if (!enabler_ref) { |
1258 | /* | |
1259 | * If no backward ref, create it. | |
1260 | * Add backward ref from event to enabler. | |
1261 | */ | |
1262 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1263 | if (!enabler_ref) | |
1264 | return -ENOMEM; | |
d871c65b FD |
1265 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1266 | event_enabler); | |
e58095ef | 1267 | cds_list_add(&enabler_ref->node, |
2e70391c | 1268 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1269 | } |
e58095ef MD |
1270 | |
1271 | /* | |
1272 | * Link filter bytecodes if not linked yet. | |
1273 | */ | |
2e70391c | 1274 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1275 | &session->priv->ctx, |
a2e4d05e | 1276 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1277 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1278 | |
1279 | /* TODO: merge event context. */ | |
1280 | } | |
de713d8a | 1281 | end: |
e58095ef MD |
1282 | return 0; |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Called at library load: connect the probe on all enablers matching | |
1287 | * this event. | |
5f733922 | 1288 | * Called with session mutex held. |
e58095ef | 1289 | */ |
5f733922 | 1290 | int lttng_fix_pending_events(void) |
e58095ef | 1291 | { |
bdb12629 | 1292 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1293 | |
bdb12629 MD |
1294 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1295 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1296 | } |
e58095ef MD |
1297 | return 0; |
1298 | } | |
1299 | ||
d8d2416d FD |
1300 | int lttng_fix_pending_event_notifiers(void) |
1301 | { | |
1302 | struct lttng_event_notifier_group *event_notifier_group; | |
1303 | ||
1304 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1305 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1306 | } | |
1307 | return 0; | |
1308 | } | |
1309 | ||
246be17e | 1310 | /* |
37dddb65 MD |
1311 | * For each session of the owner thread, execute pending statedump. |
1312 | * Only dump state for the sessions owned by the caller thread, because | |
1313 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1314 | */ |
3327ac33 | 1315 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1316 | { |
bdb12629 | 1317 | struct lttng_ust_session_private *session_priv; |
246be17e | 1318 | |
37dddb65 | 1319 | /* Execute state dump */ |
cf73e0fe | 1320 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1321 | |
1322 | /* Clear pending state dump */ | |
3327ac33 MD |
1323 | if (ust_lock()) { |
1324 | goto end; | |
1325 | } | |
bdb12629 MD |
1326 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1327 | if (session_priv->owner != owner) | |
37dddb65 | 1328 | continue; |
bdb12629 | 1329 | if (!session_priv->statedump_pending) |
37dddb65 | 1330 | continue; |
bdb12629 | 1331 | session_priv->statedump_pending = 0; |
246be17e | 1332 | } |
3327ac33 | 1333 | end: |
37dddb65 | 1334 | ust_unlock(); |
3327ac33 | 1335 | return; |
246be17e PW |
1336 | } |
1337 | ||
e58095ef | 1338 | static |
ba99fbe2 | 1339 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1340 | { |
1341 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1342 | ||
ba99fbe2 | 1343 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1344 | /* Free event enabler refs */ |
1345 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1346 | &event->priv->enablers_ref_head, node) |
e58095ef | 1347 | free(enabler_ref); |
ba99fbe2 MD |
1348 | |
1349 | switch (event->type) { | |
1350 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1351 | { | |
1352 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1353 | ||
1354 | /* Remove from event list. */ | |
1355 | cds_list_del(&event_recorder->priv->node); | |
1356 | /* Remove from event hash table. */ | |
1357 | cds_hlist_del(&event_recorder->priv->hlist); | |
1358 | ||
a40b5b8c | 1359 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1360 | free(event_recorder->parent); |
1361 | free(event_recorder->priv); | |
1362 | free(event_recorder); | |
1363 | break; | |
1364 | } | |
1365 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1366 | { | |
1367 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1368 | ||
1369 | /* Remove from event list. */ | |
1370 | cds_list_del(&event_notifier->priv->node); | |
1371 | /* Remove from event hash table. */ | |
1372 | cds_hlist_del(&event_notifier->priv->hlist); | |
1373 | ||
1374 | free(event_notifier->priv); | |
1375 | free(event_notifier->parent); | |
1376 | free(event_notifier); | |
1377 | break; | |
1378 | } | |
1379 | default: | |
1380 | abort(); | |
1381 | } | |
8020ceb5 MD |
1382 | } |
1383 | ||
c785c634 MD |
1384 | static |
1385 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1386 | { | |
1387 | cds_list_del(&_enum->node); | |
35ac38cb | 1388 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1389 | free(_enum); |
1390 | } | |
1391 | ||
fd17d7ce | 1392 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1393 | { |
bdb12629 | 1394 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1395 | |
bdb12629 MD |
1396 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1397 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1398 | } |
457a6b58 | 1399 | |
e58095ef MD |
1400 | /* |
1401 | * Enabler management. | |
1402 | */ | |
d871c65b FD |
1403 | struct lttng_event_enabler *lttng_event_enabler_create( |
1404 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1405 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1406 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1407 | { |
d871c65b | 1408 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1409 | |
d871c65b FD |
1410 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1411 | if (!event_enabler) | |
e58095ef | 1412 | return NULL; |
d871c65b FD |
1413 | event_enabler->base.format_type = format_type; |
1414 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1415 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1416 | memcpy(&event_enabler->base.event_param, event_param, | |
1417 | sizeof(event_enabler->base.event_param)); | |
1418 | event_enabler->chan = chan; | |
e58095ef | 1419 | /* ctx left NULL */ |
d871c65b | 1420 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1421 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1422 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1423 | |
1424 | return event_enabler; | |
457a6b58 MD |
1425 | } |
1426 | ||
d8d2416d FD |
1427 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1428 | struct lttng_event_notifier_group *event_notifier_group, | |
1429 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1430 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1431 | { |
1432 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1433 | ||
1434 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1435 | if (!event_notifier_enabler) | |
1436 | return NULL; | |
1437 | event_notifier_enabler->base.format_type = format_type; | |
1438 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1439 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1440 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1441 | ||
1442 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1443 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1444 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1445 | |
1446 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1447 | event_notifier_param->event.name, | |
1448 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1449 | event_notifier_enabler->base.event_param.instrumentation = | |
1450 | event_notifier_param->event.instrumentation; | |
1451 | event_notifier_enabler->base.event_param.loglevel = | |
1452 | event_notifier_param->event.loglevel; | |
1453 | event_notifier_enabler->base.event_param.loglevel_type = | |
1454 | event_notifier_param->event.loglevel_type; | |
1455 | ||
1456 | event_notifier_enabler->base.enabled = 0; | |
1457 | event_notifier_enabler->group = event_notifier_group; | |
1458 | ||
1459 | cds_list_add(&event_notifier_enabler->node, | |
1460 | &event_notifier_group->enablers_head); | |
1461 | ||
1462 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1463 | ||
1464 | return event_notifier_enabler; | |
1465 | } | |
1466 | ||
d871c65b | 1467 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1468 | { |
d871c65b | 1469 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1470 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1471 | |
e58095ef | 1472 | return 0; |
457a6b58 | 1473 | } |
457a6b58 | 1474 | |
d871c65b | 1475 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1476 | { |
d871c65b | 1477 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1478 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1479 | |
e58095ef MD |
1480 | return 0; |
1481 | } | |
457a6b58 | 1482 | |
d871c65b | 1483 | static |
a56fd376 | 1484 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1485 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1486 | { |
ab89263e MD |
1487 | (*bytecode)->enabler = enabler; |
1488 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1489 | /* Take ownership of bytecode */ | |
1490 | *bytecode = NULL; | |
d871c65b FD |
1491 | } |
1492 | ||
a56fd376 | 1493 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1494 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1495 | { |
a56fd376 | 1496 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1497 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1498 | ||
e7bc0ef6 | 1499 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1500 | return 0; |
0bfb5cbd JI |
1501 | } |
1502 | ||
d871c65b FD |
1503 | static |
1504 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1505 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1506 | { |
e9fe6aad MD |
1507 | (*excluder)->enabler = enabler; |
1508 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1509 | /* Take ownership of excluder */ | |
1510 | *excluder = NULL; | |
d871c65b FD |
1511 | } |
1512 | ||
1513 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1514 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1515 | { |
1516 | _lttng_enabler_attach_exclusion( | |
1517 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1518 | ||
e7bc0ef6 | 1519 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1520 | return 0; |
e58095ef | 1521 | } |
f488575f | 1522 | |
d8d2416d FD |
1523 | int lttng_event_notifier_enabler_enable( |
1524 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1525 | { | |
1526 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1527 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
1532 | int lttng_event_notifier_enabler_disable( | |
1533 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1534 | { | |
1535 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1536 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1537 | ||
1538 | return 0; | |
1539 | } | |
1540 | ||
a56fd376 | 1541 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1542 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1543 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1544 | { |
a56fd376 | 1545 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1546 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1547 | bytecode); | |
1548 | ||
1549 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1550 | return 0; | |
1551 | } | |
1552 | ||
d37ecb3f FD |
1553 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1554 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1555 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1556 | { |
49cde654 | 1557 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1558 | event_notifier_enabler); |
49cde654 | 1559 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1560 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1561 | /* Take ownership of bytecode */ |
1562 | *bytecode = NULL; | |
d37ecb3f FD |
1563 | event_notifier_enabler->num_captures++; |
1564 | ||
1565 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1566 | return 0; | |
1567 | } | |
1568 | ||
d8d2416d FD |
1569 | int lttng_event_notifier_enabler_attach_exclusion( |
1570 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1571 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1572 | { |
1573 | _lttng_enabler_attach_exclusion( | |
1574 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1575 | excluder); | |
1576 | ||
1577 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1578 | return 0; | |
1579 | } | |
1580 | ||
fd17d7ce MD |
1581 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1582 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1583 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1584 | { |
457a6b58 | 1585 | /* |
e58095ef MD |
1586 | * We cannot attach a context after trace has been started for a |
1587 | * session because the metadata does not allow expressing this | |
1588 | * information outside of the original channel scope. | |
457a6b58 | 1589 | */ |
bdb12629 | 1590 | if (session->priv->been_active) |
e58095ef | 1591 | return -EPERM; |
457a6b58 | 1592 | |
e58095ef | 1593 | switch (context_param->ctx) { |
fd17d7ce | 1594 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1595 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1596 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1597 | { |
fd17d7ce | 1598 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1599 | |
1600 | perf_ctx_param = &context_param->u.perf_counter; | |
1601 | return lttng_add_perf_counter_to_ctx( | |
1602 | perf_ctx_param->type, | |
1603 | perf_ctx_param->config, | |
1604 | perf_ctx_param->name, | |
1605 | ctx); | |
1606 | } | |
fd17d7ce | 1607 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1608 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1609 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1610 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1611 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1612 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1613 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1614 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1615 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1616 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1617 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1618 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1619 | ctx); | |
fd17d7ce | 1620 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1621 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1622 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1623 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1624 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1625 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1626 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1627 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1628 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1629 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1630 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1631 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1632 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1633 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1634 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1635 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1636 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1637 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1638 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1639 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1640 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1641 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1642 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1643 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1644 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1645 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1646 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1647 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1648 | default: |
1649 | return -EINVAL; | |
457a6b58 | 1650 | } |
457a6b58 MD |
1651 | } |
1652 | ||
2208d8b5 MJ |
1653 | int lttng_event_enabler_attach_context( |
1654 | struct lttng_event_enabler *enabler __attribute__((unused)), | |
1655 | struct lttng_ust_abi_context *context_param __attribute__((unused))) | |
457a6b58 | 1656 | { |
e58095ef | 1657 | return -ENOSYS; |
457a6b58 MD |
1658 | } |
1659 | ||
d871c65b | 1660 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1661 | { |
d871c65b FD |
1662 | if (!event_enabler) { |
1663 | return; | |
0f63324a | 1664 | } |
d871c65b | 1665 | cds_list_del(&event_enabler->node); |
0f63324a | 1666 | |
d871c65b | 1667 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1668 | |
d871c65b FD |
1669 | lttng_destroy_context(event_enabler->ctx); |
1670 | free(event_enabler); | |
457a6b58 MD |
1671 | } |
1672 | ||
e58095ef | 1673 | /* |
d871c65b | 1674 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1675 | * session. |
1676 | */ | |
457a6b58 | 1677 | static |
f69fe5fb | 1678 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1679 | { |
d871c65b | 1680 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1681 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1682 | |
bdb12629 | 1683 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1684 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1685 | /* |
1686 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1687 | * and its channel and session transient states are enabled, we |
1688 | * enable the event, else we disable it. | |
e58095ef | 1689 | */ |
2e70391c | 1690 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1691 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1692 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1693 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1694 | int nr_filters = 0; | |
e58095ef MD |
1695 | |
1696 | /* Enable events */ | |
1697 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1698 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1699 | if (enabler_ref->ref->enabled) { |
1700 | enabled = 1; | |
1701 | break; | |
1702 | } | |
1703 | } | |
ac6b4ac6 MD |
1704 | /* |
1705 | * Enabled state is based on union of enablers, with | |
1706 | * intesection of session and channel transient enable | |
1707 | * states. | |
1708 | */ | |
e7bc0ef6 | 1709 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1710 | |
2e70391c | 1711 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1712 | /* |
1713 | * Sync tracepoint registration with event enabled | |
1714 | * state. | |
1715 | */ | |
1716 | if (enabled) { | |
2e70391c | 1717 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1718 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1719 | } else { |
2e70391c | 1720 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1721 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1722 | } |
457a6b58 | 1723 | |
1f49fc05 | 1724 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1725 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1726 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1727 | if (enabler_ref->ref->enabled |
1728 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1729 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1730 | break; |
1731 | } | |
1732 | } | |
a2e4d05e MD |
1733 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1734 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1735 | |
e58095ef MD |
1736 | /* Enable filters */ |
1737 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1738 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1739 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1740 | nr_filters++; |
457a6b58 | 1741 | } |
a2e4d05e MD |
1742 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1743 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1744 | } |
d10a2205 | 1745 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1746 | } |
1747 | ||
d8d2416d FD |
1748 | static |
1749 | void lttng_create_event_notifier_if_missing( | |
1750 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1751 | { | |
1752 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
4e48b5d2 | 1753 | struct lttng_ust_registered_probe *reg_probe; |
d8d2416d FD |
1754 | struct cds_list_head *probe_list; |
1755 | int i; | |
1756 | ||
1757 | probe_list = lttng_get_probe_list_head(); | |
1758 | ||
4e48b5d2 MD |
1759 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1760 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1761 | ||
d8d2416d FD |
1762 | for (i = 0; i < probe_desc->nr_events; i++) { |
1763 | int ret; | |
1764 | bool found = false; | |
4e48b5d2 | 1765 | const struct lttng_ust_event_desc *desc; |
115db533 | 1766 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1767 | struct cds_hlist_head *head; |
1768 | struct cds_hlist_node *node; | |
1769 | ||
1770 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1771 | |
d8d2416d FD |
1772 | if (!lttng_desc_match_enabler(desc, |
1773 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1774 | continue; | |
1775 | ||
1776 | /* | |
1777 | * Given the current event_notifier group, get the bucket that | |
1778 | * the target event_notifier would be if it was already | |
1779 | * created. | |
1780 | */ | |
1781 | head = borrow_hash_table_bucket( | |
1782 | event_notifier_group->event_notifiers_ht.table, | |
1783 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1784 | ||
115db533 | 1785 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1786 | /* |
1787 | * Check if event_notifier already exists by checking | |
1788 | * if the event_notifier and enabler share the same | |
1789 | * description and id. | |
1790 | */ | |
115db533 MD |
1791 | if (event_notifier_priv->parent.desc == desc && |
1792 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1793 | found = true; |
1794 | break; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | if (found) | |
1799 | continue; | |
1800 | ||
1801 | /* | |
1802 | * We need to create a event_notifier for this event probe. | |
1803 | */ | |
1804 | ret = lttng_event_notifier_create(desc, | |
1805 | event_notifier_enabler->user_token, | |
6566528b | 1806 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1807 | event_notifier_group); |
1808 | if (ret) { | |
5b4c6da4 MD |
1809 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1810 | probe_desc->provider_name, | |
1811 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1812 | } |
1813 | } | |
1814 | } | |
1815 | } | |
1816 | ||
1817 | /* | |
1818 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1819 | */ | |
1820 | static | |
1821 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1822 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1823 | { | |
1824 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1825 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1826 | |
1827 | /* | |
1828 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1829 | * might still be attaching filter or exclusion to the | |
1830 | * event_notifier_enabler. | |
1831 | */ | |
1832 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1833 | goto end; | |
1834 | ||
1835 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1836 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1837 | ||
1838 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1839 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1840 | struct lttng_enabler_ref *enabler_ref; |
1841 | ||
115db533 | 1842 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1843 | continue; |
1844 | ||
115db533 | 1845 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1846 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1847 | if (!enabler_ref) { | |
1848 | /* | |
1849 | * If no backward ref, create it. | |
1850 | * Add backward ref from event_notifier to enabler. | |
1851 | */ | |
1852 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1853 | if (!enabler_ref) | |
1854 | return -ENOMEM; | |
1855 | ||
1856 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1857 | event_notifier_enabler); | |
1858 | cds_list_add(&enabler_ref->node, | |
115db533 | 1859 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1860 | } |
1861 | ||
1862 | /* | |
1863 | * Link filter bytecodes if not linked yet. | |
1864 | */ | |
115db533 | 1865 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1866 | &event_notifier_group->ctx, |
a2e4d05e | 1867 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1868 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1869 | |
1870 | /* | |
1871 | * Link capture bytecodes if not linked yet. | |
1872 | */ | |
115db533 | 1873 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1874 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1875 | &event_notifier_enabler->capture_bytecode_head); |
1876 | ||
115db533 | 1877 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1878 | } |
1879 | end: | |
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | static | |
1884 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1885 | { | |
1886 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1887 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1888 | |
1889 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1890 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1891 | ||
1892 | /* | |
1893 | * For each event_notifier, if at least one of its enablers is enabled, | |
1894 | * we enable the event_notifier, else we disable it. | |
1895 | */ | |
115db533 | 1896 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1897 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1898 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1899 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1900 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1901 | |
1902 | /* Enable event_notifiers */ | |
1903 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1904 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1905 | if (enabler_ref->ref->enabled) { |
1906 | enabled = 1; | |
1907 | break; | |
1908 | } | |
1909 | } | |
1910 | ||
115db533 | 1911 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1912 | /* |
1913 | * Sync tracepoint registration with event_notifier enabled | |
1914 | * state. | |
1915 | */ | |
1916 | if (enabled) { | |
115db533 | 1917 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1918 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1919 | } else { |
115db533 | 1920 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1921 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1922 | } |
1923 | ||
1924 | /* Check if has enablers without bytecode enabled */ | |
1925 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1926 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1927 | if (enabler_ref->ref->enabled |
1928 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1929 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1930 | break; |
1931 | } | |
1932 | } | |
a2e4d05e MD |
1933 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1934 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1935 | |
1936 | /* Enable filters */ | |
1937 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1938 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1939 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1940 | nr_filters++; |
d8d2416d | 1941 | } |
a2e4d05e MD |
1942 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1943 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1944 | |
1945 | /* Enable captures. */ | |
1946 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1947 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1948 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1949 | nr_captures++; |
d37ecb3f | 1950 | } |
a2e4d05e MD |
1951 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1952 | !!nr_captures); | |
d8d2416d | 1953 | } |
d10a2205 | 1954 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1955 | } |
1956 | ||
e58095ef MD |
1957 | /* |
1958 | * Apply enablers to session events, adding events to session if need | |
1959 | * be. It is required after each modification applied to an active | |
1960 | * session, and right before session "start". | |
1961 | * "lazy" sync means we only sync if required. | |
1962 | */ | |
1963 | static | |
f69fe5fb | 1964 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1965 | { |
e58095ef MD |
1966 | /* We can skip if session is not active */ |
1967 | if (!session->active) | |
1968 | return; | |
d871c65b | 1969 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1970 | } |
53569322 MD |
1971 | |
1972 | /* | |
1973 | * Update all sessions with the given app context. | |
1974 | * Called with ust lock held. | |
1975 | * This is invoked when an application context gets loaded/unloaded. It | |
1976 | * ensures the context callbacks are in sync with the application | |
1977 | * context (either app context callbacks, or dummy callbacks). | |
1978 | */ | |
1979 | void lttng_ust_context_set_session_provider(const char *name, | |
b2e37d27 MD |
1980 | size_t (*get_size)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
1981 | size_t offset), | |
1982 | void (*record)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, | |
1983 | struct lttng_ust_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 1984 | struct lttng_ust_channel_buffer *chan), |
b2e37d27 | 1985 | void (*get_value)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
a5d437c5 | 1986 | struct lttng_ust_ctx_value *value)) |
53569322 | 1987 | { |
bdb12629 | 1988 | struct lttng_ust_session_private *session_priv; |
53569322 | 1989 | |
bdb12629 | 1990 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 1991 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 1992 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
1993 | int ret; |
1994 | ||
bdb12629 | 1995 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
a5d437c5 | 1996 | name, get_size, record, get_value); |
53569322 MD |
1997 | if (ret) |
1998 | abort(); | |
bdb12629 | 1999 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2000 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
a5d437c5 | 2001 | name, get_size, record, get_value); |
53569322 MD |
2002 | if (ret) |
2003 | abort(); | |
2004 | } | |
2e70391c | 2005 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2006 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
a5d437c5 | 2007 | name, get_size, record, get_value); |
53569322 MD |
2008 | if (ret) |
2009 | abort(); | |
2010 | } | |
2011 | } | |
2012 | } | |
d8d2416d FD |
2013 | |
2014 | /* | |
2015 | * Update all event_notifier groups with the given app context. | |
2016 | * Called with ust lock held. | |
2017 | * This is invoked when an application context gets loaded/unloaded. It | |
2018 | * ensures the context callbacks are in sync with the application | |
2019 | * context (either app context callbacks, or dummy callbacks). | |
2020 | */ | |
2021 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
b2e37d27 MD |
2022 | size_t (*get_size)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
2023 | size_t offset), | |
2024 | void (*record)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, | |
2025 | struct lttng_ust_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2026 | struct lttng_ust_channel_buffer *chan), |
b2e37d27 | 2027 | void (*get_value)(void *priv, struct lttng_ust_probe_ctx *probe_ctx, |
a5d437c5 | 2028 | struct lttng_ust_ctx_value *value)) |
d8d2416d FD |
2029 | { |
2030 | struct lttng_event_notifier_group *event_notifier_group; | |
2031 | ||
2032 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2033 | int ret; | |
2034 | ||
2035 | ret = lttng_ust_context_set_provider_rcu( | |
2036 | &event_notifier_group->ctx, | |
a5d437c5 | 2037 | name, get_size, record, get_value); |
d8d2416d FD |
2038 | if (ret) |
2039 | abort(); | |
2040 | } | |
2041 | } | |
9daacd1a MD |
2042 | |
2043 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2044 | unsigned char *uuid) | |
2045 | { | |
2046 | if (!session) | |
2047 | return 0; | |
2048 | /* Compare UUID with session. */ | |
2049 | if (session->priv->uuid_set) { | |
2050 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2051 | return -1; | |
2052 | } | |
2053 | } else { | |
2054 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2055 | session->priv->uuid_set = true; | |
2056 | } | |
2057 | return 0; | |
2058 | ||
2059 | } |