Commit | Line | Data |
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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8020ceb5 | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * Holds LTTng per-session event registry. |
8020ceb5 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b5234c06 | 10 | #include <stdio.h> |
d8d2416d | 11 | #include <assert.h> |
b5234c06 | 12 | #include <errno.h> |
d8d2416d FD |
13 | #include <limits.h> |
14 | #include <pthread.h> | |
f4681817 MD |
15 | #include <sys/shm.h> |
16 | #include <sys/ipc.h> | |
44c72f10 MD |
17 | #include <stdint.h> |
18 | #include <stddef.h> | |
28b12049 MD |
19 | #include <inttypes.h> |
20 | #include <time.h> | |
196ec2df | 21 | #include <stdbool.h> |
d8d2416d | 22 | #include <unistd.h> |
10544ee8 | 23 | #include <dlfcn.h> |
2ae57758 | 24 | #include <lttng/ust-endian.h> |
44c72f10 | 25 | |
d8d2416d | 26 | #include <urcu/arch.h> |
44c72f10 | 27 | #include <urcu/compiler.h> |
d8d2416d FD |
28 | #include <urcu/hlist.h> |
29 | #include <urcu/list.h> | |
44c72f10 | 30 | #include <urcu/uatomic.h> |
44c72f10 MD |
31 | |
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 MD |
34 | |
35 | #include <usterr-signal-safe.h> | |
864a1eda | 36 | #include <ust-helper.h> |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
32ce8569 | 38 | #include <ust-comm.h> |
d8d2416d | 39 | #include <ust-fd.h> |
ae4b659d MJ |
40 | #include <ust-dynamic-type.h> |
41 | #include <ust-context-provider.h> | |
1f18504e | 42 | #include "error.h" |
08114193 | 43 | #include "compat.h" |
eda498b8 | 44 | #include "lttng-ust-uuid.h" |
44c72f10 | 45 | |
457a6b58 | 46 | #include "tracepoint-internal.h" |
196ec2df | 47 | #include "string-utils.h" |
4d451c15 | 48 | #include "lttng-bytecode.h" |
7dd08bec MD |
49 | #include "lttng-tracer.h" |
50 | #include "lttng-tracer-core.h" | |
cf73e0fe | 51 | #include "lttng-ust-statedump.h" |
51f804ec | 52 | #include "context-internal.h" |
d871c65b | 53 | #include "ust-events-internal.h" |
b728d87e | 54 | #include "wait.h" |
8d8a24c8 | 55 | #include "../libringbuffer/shm.h" |
3b5babf8 | 56 | #include "../libringbuffer/frontend_types.h" |
b89c5899 | 57 | #include "../libringbuffer/frontend.h" |
ebabbf58 | 58 | #include "../libcounter/counter.h" |
596c4223 | 59 | #include "jhash.h" |
d8d2416d | 60 | #include <lttng/ust-abi.h> |
4b4a1337 | 61 | #include "context-provider-internal.h" |
8165c8da MD |
62 | |
63 | /* | |
3327ac33 MD |
64 | * All operations within this file are called by the communication |
65 | * thread, under ust_lock protection. | |
8165c8da | 66 | */ |
8165c8da | 67 | |
b5234c06 | 68 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 69 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 70 | |
7753d283 | 71 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
72 | { |
73 | return &sessions; | |
74 | } | |
75 | ||
ba99fbe2 | 76 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 77 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 78 | |
e58095ef | 79 | static |
f69fe5fb | 80 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 81 | static |
f69fe5fb | 82 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 83 | static |
d8d2416d FD |
84 | void lttng_event_notifier_group_sync_enablers( |
85 | struct lttng_event_notifier_group *event_notifier_group); | |
86 | static | |
e58095ef MD |
87 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
88 | ||
5b4c6da4 MD |
89 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
90 | { | |
91 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
92 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
93 | return false; | |
94 | return true; | |
95 | } | |
96 | ||
97 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
98 | char *name) | |
99 | { | |
100 | strcpy(name, desc->probe_desc->provider_name); | |
101 | strcat(name, ":"); | |
102 | strcat(name, desc->event_name); | |
103 | } | |
104 | ||
6715d7d1 MD |
105 | /* |
106 | * Called with ust lock held. | |
107 | */ | |
108 | int lttng_session_active(void) | |
109 | { | |
bdb12629 | 110 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
111 | |
112 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 113 | if (iter->pub->active) |
6715d7d1 MD |
114 | return 1; |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
e58095ef MD |
119 | static |
120 | int lttng_loglevel_match(int loglevel, | |
121 | unsigned int has_loglevel, | |
fd17d7ce | 122 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
123 | int req_loglevel) |
124 | { | |
e58095ef MD |
125 | if (!has_loglevel) |
126 | loglevel = TRACE_DEFAULT; | |
457a6b58 | 127 | switch (req_type) { |
fd17d7ce | 128 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 129 | if (loglevel <= req_loglevel |
67ada458 | 130 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
131 | return 1; |
132 | else | |
133 | return 0; | |
fd17d7ce | 134 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 135 | if (loglevel == req_loglevel |
67ada458 | 136 | || (req_loglevel == -1 && loglevel <= TRACE_DEBUG)) |
457a6b58 MD |
137 | return 1; |
138 | else | |
139 | return 0; | |
fd17d7ce | 140 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 141 | default: |
67ada458 | 142 | if (loglevel <= TRACE_DEBUG) |
aacb3774 MD |
143 | return 1; |
144 | else | |
145 | return 0; | |
457a6b58 MD |
146 | } |
147 | } | |
148 | ||
f69fe5fb | 149 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 150 | { |
f69fe5fb | 151 | struct lttng_ust_session *session; |
bdb12629 | 152 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 153 | int i; |
8020ceb5 | 154 | |
f69fe5fb | 155 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
156 | if (!session) |
157 | return NULL; | |
f69fe5fb | 158 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
159 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
160 | if (!session_priv) { | |
53569322 MD |
161 | free(session); |
162 | return NULL; | |
163 | } | |
bdb12629 MD |
164 | session->priv = session_priv; |
165 | session_priv->pub = session; | |
166 | if (lttng_context_init_all(&session->priv->ctx)) { | |
167 | free(session_priv); | |
168 | free(session); | |
169 | return NULL; | |
170 | } | |
171 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
172 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
173 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
174 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 175 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 176 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 177 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
178 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
179 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
180 | return session; |
181 | } | |
182 | ||
ebabbf58 MD |
183 | struct lttng_counter *lttng_ust_counter_create( |
184 | const char *counter_transport_name, | |
185 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
186 | { | |
187 | struct lttng_counter_transport *counter_transport = NULL; | |
188 | struct lttng_counter *counter = NULL; | |
189 | ||
190 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
191 | if (!counter_transport) | |
192 | goto notransport; | |
193 | counter = zmalloc(sizeof(struct lttng_counter)); | |
194 | if (!counter) | |
195 | goto nomem; | |
196 | ||
197 | counter->ops = &counter_transport->ops; | |
198 | counter->transport = counter_transport; | |
199 | ||
200 | counter->counter = counter->ops->counter_create( | |
201 | number_dimensions, dimensions, 0, | |
202 | -1, 0, NULL, false); | |
203 | if (!counter->counter) { | |
204 | goto create_error; | |
205 | } | |
206 | ||
207 | return counter; | |
208 | ||
209 | create_error: | |
210 | free(counter); | |
211 | nomem: | |
212 | notransport: | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | static | |
217 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
218 | { | |
219 | counter->ops->counter_destroy(counter->counter); | |
220 | free(counter); | |
221 | } | |
222 | ||
d8d2416d FD |
223 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
224 | { | |
225 | struct lttng_event_notifier_group *event_notifier_group; | |
226 | int i; | |
227 | ||
228 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
229 | if (!event_notifier_group) | |
230 | return NULL; | |
231 | ||
51f804ec FD |
232 | /* Add all contexts. */ |
233 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
234 | free(event_notifier_group); | |
235 | return NULL; | |
236 | } | |
237 | ||
d8d2416d FD |
238 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
239 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
240 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
241 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
242 | ||
243 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
244 | ||
245 | return event_notifier_group; | |
246 | } | |
247 | ||
74d81a6c MD |
248 | /* |
249 | * Only used internally at session destruction. | |
250 | */ | |
251 | static | |
e7bc0ef6 | 252 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 253 | { |
5198080d | 254 | struct lttng_ust_lib_ring_buffer_channel *chan; |
74d81a6c MD |
255 | struct lttng_ust_shm_handle *handle; |
256 | ||
e7bc0ef6 | 257 | cds_list_del(<tng_chan->priv->node); |
0950190a | 258 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 259 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 260 | handle = chan->handle; |
74d81a6c | 261 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
262 | free(lttng_chan->parent); |
263 | free(lttng_chan->priv); | |
f0fde1c3 | 264 | free(lttng_chan); |
74d81a6c MD |
265 | } |
266 | ||
ac6b4ac6 | 267 | static |
ba99fbe2 | 268 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
269 | { |
270 | int ret; | |
4e48b5d2 | 271 | const struct lttng_ust_event_desc *desc; |
5b4c6da4 | 272 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
ac6b4ac6 | 273 | |
ba99fbe2 MD |
274 | assert(event->priv->registered == 0); |
275 | desc = event->priv->desc; | |
5b4c6da4 MD |
276 | lttng_ust_format_event_name(desc, name); |
277 | ret = lttng_ust_tp_probe_register_queue_release(name, | |
ac6b4ac6 | 278 | desc->probe_callback, |
ba99fbe2 | 279 | event, desc->signature); |
ac6b4ac6 MD |
280 | WARN_ON_ONCE(ret); |
281 | if (!ret) | |
ba99fbe2 | 282 | event->priv->registered = 1; |
ac6b4ac6 MD |
283 | } |
284 | ||
d8d2416d | 285 | static |
ba99fbe2 | 286 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
287 | { |
288 | int ret; | |
4e48b5d2 | 289 | const struct lttng_ust_event_desc *desc; |
5b4c6da4 | 290 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
d8d2416d | 291 | |
ba99fbe2 MD |
292 | assert(event->priv->registered == 1); |
293 | desc = event->priv->desc; | |
5b4c6da4 MD |
294 | lttng_ust_format_event_name(desc, name); |
295 | ret = lttng_ust_tp_probe_unregister_queue_release(name, | |
ac6b4ac6 | 296 | desc->probe_callback, |
ba99fbe2 | 297 | event); |
ac6b4ac6 MD |
298 | WARN_ON_ONCE(ret); |
299 | if (!ret) | |
ba99fbe2 | 300 | event->priv->registered = 0; |
ac6b4ac6 MD |
301 | } |
302 | ||
d8d2416d | 303 | static |
ba99fbe2 | 304 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 305 | { |
ba99fbe2 MD |
306 | if (event->priv->registered) |
307 | unregister_event(event); | |
d8d2416d FD |
308 | } |
309 | ||
f69fe5fb | 310 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 311 | { |
e7bc0ef6 | 312 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 313 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 314 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 315 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 316 | |
b5234c06 | 317 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 318 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 319 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 320 | } |
b653ddc1 | 321 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 322 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 323 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 324 | &session->priv->enablers_head, node) |
d871c65b | 325 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 326 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 327 | &session->priv->events_head, node) |
ba99fbe2 | 328 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 329 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 330 | &session->priv->enums_head, node) |
c785c634 | 331 | _lttng_enum_destroy(_enum); |
bdb12629 | 332 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 333 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
334 | cds_list_del(&session->priv->node); |
335 | lttng_destroy_context(session->priv->ctx); | |
336 | free(session->priv); | |
b5234c06 | 337 | free(session); |
8020ceb5 MD |
338 | } |
339 | ||
d8d2416d FD |
340 | void lttng_event_notifier_group_destroy( |
341 | struct lttng_event_notifier_group *event_notifier_group) | |
342 | { | |
343 | int close_ret; | |
344 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 345 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
346 | |
347 | if (!event_notifier_group) { | |
348 | return; | |
349 | } | |
350 | ||
ba99fbe2 | 351 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 352 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 353 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 354 | |
b653ddc1 | 355 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
356 | |
357 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
358 | &event_notifier_group->enablers_head, node) | |
359 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
360 | ||
ba99fbe2 | 361 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 362 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 363 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 364 | |
ebabbf58 MD |
365 | if (event_notifier_group->error_counter) |
366 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
367 | ||
368 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
369 | |
370 | lttng_ust_lock_fd_tracker(); | |
371 | close_ret = close(event_notifier_group->notification_fd); | |
372 | if (!close_ret) { | |
373 | lttng_ust_delete_fd_from_tracker( | |
374 | event_notifier_group->notification_fd); | |
375 | } else { | |
376 | PERROR("close"); | |
377 | abort(); | |
378 | } | |
379 | lttng_ust_unlock_fd_tracker(); | |
380 | ||
381 | cds_list_del(&event_notifier_group->node); | |
382 | ||
383 | free(event_notifier_group); | |
384 | } | |
385 | ||
d871c65b FD |
386 | static |
387 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
388 | { | |
ab249ecf | 389 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
390 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
391 | ||
392 | if (!enabler) { | |
393 | return; | |
394 | } | |
395 | ||
396 | /* Destroy filter bytecode */ | |
397 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
398 | &enabler->filter_bytecode_head, node) { | |
399 | free(filter_node); | |
400 | } | |
401 | ||
402 | /* Destroy excluders */ | |
403 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
404 | &enabler->excluder_head, node) { | |
405 | free(excluder_node); | |
406 | } | |
407 | } | |
408 | ||
d8d2416d FD |
409 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
410 | { | |
411 | if (!event_notifier_enabler) { | |
412 | return; | |
413 | } | |
414 | ||
415 | cds_list_del(&event_notifier_enabler->node); | |
416 | ||
417 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
418 | ||
419 | free(event_notifier_enabler); | |
420 | } | |
421 | ||
53569322 | 422 | static |
4e48b5d2 | 423 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 424 | struct lttng_ust_session *session) |
53569322 MD |
425 | { |
426 | const char *enum_name = desc->name; | |
427 | struct lttng_enum *_enum; | |
428 | struct cds_hlist_head *head; | |
53569322 MD |
429 | int ret = 0; |
430 | size_t name_len = strlen(enum_name); | |
431 | uint32_t hash; | |
432 | int notify_socket; | |
433 | ||
b33b46f7 | 434 | /* Check if this enum is already registered for this session. */ |
53569322 | 435 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 436 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
437 | |
438 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
439 | if (_enum) { | |
440 | ret = -EEXIST; | |
441 | goto exist; | |
53569322 MD |
442 | } |
443 | ||
bdb12629 | 444 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
445 | if (notify_socket < 0) { |
446 | ret = notify_socket; | |
447 | goto socket_error; | |
448 | } | |
449 | ||
450 | _enum = zmalloc(sizeof(*_enum)); | |
451 | if (!_enum) { | |
452 | ret = -ENOMEM; | |
453 | goto cache_error; | |
454 | } | |
455 | _enum->session = session; | |
456 | _enum->desc = desc; | |
457 | ||
458 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 459 | session->priv->objd, |
53569322 MD |
460 | enum_name, |
461 | desc->nr_entries, | |
462 | desc->entries, | |
463 | &_enum->id); | |
464 | if (ret < 0) { | |
465 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
466 | goto sessiond_register_error; | |
467 | } | |
bdb12629 | 468 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
469 | cds_hlist_add_head(&_enum->hlist, head); |
470 | return 0; | |
471 | ||
472 | sessiond_register_error: | |
473 | free(_enum); | |
474 | cache_error: | |
475 | socket_error: | |
476 | exist: | |
477 | return ret; | |
478 | } | |
479 | ||
480 | static | |
4e48b5d2 | 481 | int lttng_create_enum_check(const struct lttng_ust_type_common *type, |
f69fe5fb | 482 | struct lttng_ust_session *session) |
53569322 | 483 | { |
a084756d MD |
484 | switch (type->type) { |
485 | case lttng_ust_type_enum: | |
218deb69 | 486 | { |
4e48b5d2 | 487 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
488 | int ret; |
489 | ||
a084756d | 490 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
491 | ret = lttng_enum_create(enum_desc, session); |
492 | if (ret && ret != -EEXIST) { | |
493 | DBG("Unable to create enum error: (%d)", ret); | |
494 | return ret; | |
495 | } | |
496 | break; | |
497 | } | |
a084756d | 498 | case lttng_ust_type_dynamic: |
53569322 | 499 | { |
4e48b5d2 MD |
500 | const struct lttng_ust_event_field *tag_field_generic; |
501 | const struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
502 | int ret; |
503 | ||
504 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 505 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
506 | ret = lttng_enum_create(enum_desc, session); |
507 | if (ret && ret != -EEXIST) { | |
508 | DBG("Unable to create enum error: (%d)", ret); | |
509 | return ret; | |
510 | } | |
511 | break; | |
512 | } | |
513 | default: | |
514 | /* TODO: nested types when they become supported. */ | |
515 | break; | |
516 | } | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static | |
521 | int lttng_create_all_event_enums(size_t nr_fields, | |
4e48b5d2 | 522 | const struct lttng_ust_event_field **event_fields, |
f69fe5fb | 523 | struct lttng_ust_session *session) |
53569322 MD |
524 | { |
525 | size_t i; | |
526 | int ret; | |
527 | ||
528 | /* For each field, ensure enum is part of the session. */ | |
529 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 530 | const struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
531 | |
532 | ret = lttng_create_enum_check(type, session); | |
533 | if (ret) | |
534 | return ret; | |
535 | } | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static | |
540 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
4e48b5d2 | 541 | struct lttng_ust_ctx_field *ctx_fields, |
f69fe5fb | 542 | struct lttng_ust_session *session) |
53569322 MD |
543 | { |
544 | size_t i; | |
545 | int ret; | |
546 | ||
547 | /* For each field, ensure enum is part of the session. */ | |
548 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 549 | const struct lttng_ust_type_common *type = ctx_fields[i].event_field->type; |
53569322 MD |
550 | |
551 | ret = lttng_create_enum_check(type, session); | |
552 | if (ret) | |
553 | return ret; | |
554 | } | |
555 | return 0; | |
556 | } | |
557 | ||
710b8ee3 MD |
558 | /* |
559 | * Ensure that a state-dump will be performed for this session at the end | |
560 | * of the current handle_message(). | |
561 | */ | |
f69fe5fb | 562 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 563 | { |
bdb12629 MD |
564 | session->priv->statedump_pending = 1; |
565 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
566 | return 0; |
567 | } | |
53569322 | 568 | |
f69fe5fb | 569 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
570 | { |
571 | int ret = 0; | |
e7bc0ef6 | 572 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 573 | int notify_socket; |
8020ceb5 | 574 | |
8020ceb5 MD |
575 | if (session->active) { |
576 | ret = -EBUSY; | |
577 | goto end; | |
578 | } | |
579 | ||
bdb12629 | 580 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
581 | if (notify_socket < 0) |
582 | return notify_socket; | |
583 | ||
ac6b4ac6 | 584 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 585 | session->priv->tstate = 1; |
e58095ef | 586 | |
3ff7660f | 587 | /* We need to sync enablers with session before activation. */ |
d871c65b | 588 | lttng_session_sync_event_enablers(session); |
3ff7660f | 589 | |
8020ceb5 MD |
590 | /* |
591 | * Snapshot the number of events per channel to know the type of header | |
592 | * we need to use. | |
593 | */ | |
bdb12629 | 594 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 595 | struct lttng_ust_ctx *ctx; |
4e48b5d2 | 596 | struct lttng_ust_ctx_field *fields = NULL; |
32ce8569 | 597 | size_t nr_fields = 0; |
6ca18e66 | 598 | uint32_t chan_id; |
32ce8569 MD |
599 | |
600 | /* don't change it if session stop/restart */ | |
8020ceb5 | 601 | if (chan->header_type) |
32ce8569 | 602 | continue; |
0950190a | 603 | ctx = chan->ctx; |
32ce8569 MD |
604 | if (ctx) { |
605 | nr_fields = ctx->nr_fields; | |
83e43212 | 606 | fields = ctx->fields; |
53569322 MD |
607 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
608 | session); | |
609 | if (ret < 0) { | |
610 | DBG("Error (%d) adding enum to session", ret); | |
611 | return ret; | |
612 | } | |
32ce8569 MD |
613 | } |
614 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 615 | session, |
bdb12629 | 616 | session->priv->objd, |
e7bc0ef6 | 617 | chan->parent.objd, |
32ce8569 MD |
618 | nr_fields, |
619 | fields, | |
6ca18e66 | 620 | &chan_id, |
32ce8569 | 621 | &chan->header_type); |
b869b5ae MD |
622 | if (ret) { |
623 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 624 | return ret; |
b869b5ae | 625 | } |
6ca18e66 MD |
626 | if (chan_id != chan->id) { |
627 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
628 | chan_id, chan->id); | |
629 | return -EINVAL; | |
630 | } | |
8020ceb5 MD |
631 | } |
632 | ||
ac6b4ac6 | 633 | /* Set atomically the state to "active" */ |
b5234c06 | 634 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 635 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 636 | |
710b8ee3 MD |
637 | ret = lttng_session_statedump(session); |
638 | if (ret) | |
639 | return ret; | |
8020ceb5 | 640 | end: |
8020ceb5 MD |
641 | return ret; |
642 | } | |
643 | ||
f69fe5fb | 644 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
645 | { |
646 | int ret = 0; | |
647 | ||
8020ceb5 MD |
648 | if (!session->active) { |
649 | ret = -EBUSY; | |
650 | goto end; | |
651 | } | |
ac6b4ac6 | 652 | /* Set atomically the state to "inactive" */ |
b5234c06 | 653 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
654 | |
655 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 656 | session->priv->tstate = 0; |
d871c65b | 657 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 658 | end: |
8020ceb5 MD |
659 | return ret; |
660 | } | |
661 | ||
e7bc0ef6 | 662 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 663 | { |
ac6b4ac6 | 664 | int ret = 0; |
976fe9ea | 665 | |
e7bc0ef6 | 666 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
667 | ret = -EBUSY; |
668 | goto end; | |
669 | } | |
670 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
671 | lttng_channel->priv->tstate = 1; |
672 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 673 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 674 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
675 | end: |
676 | return ret; | |
976fe9ea MD |
677 | } |
678 | ||
e7bc0ef6 | 679 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 680 | { |
ac6b4ac6 | 681 | int ret = 0; |
976fe9ea | 682 | |
e7bc0ef6 | 683 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
684 | ret = -EBUSY; |
685 | goto end; | |
686 | } | |
687 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 688 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 689 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
690 | lttng_channel->priv->tstate = 0; |
691 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
692 | end: |
693 | return ret; | |
976fe9ea MD |
694 | } |
695 | ||
fb470188 FD |
696 | static inline |
697 | struct cds_hlist_head *borrow_hash_table_bucket( | |
698 | struct cds_hlist_head *hash_table, | |
699 | unsigned int hash_table_size, | |
4e48b5d2 | 700 | const struct lttng_ust_event_desc *desc) |
fb470188 | 701 | { |
5b4c6da4 | 702 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
703 | size_t name_len; |
704 | uint32_t hash; | |
705 | ||
5b4c6da4 MD |
706 | lttng_ust_format_event_name(desc, name); |
707 | name_len = strlen(name); | |
fb470188 | 708 | |
5b4c6da4 | 709 | hash = jhash(name, name_len, 0); |
fb470188 FD |
710 | return &hash_table[hash & (hash_table_size - 1)]; |
711 | } | |
712 | ||
8020ceb5 MD |
713 | /* |
714 | * Supports event creation while tracing session is active. | |
715 | */ | |
e58095ef | 716 | static |
4e48b5d2 | 717 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 718 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 719 | { |
5b4c6da4 | 720 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
721 | struct lttng_ust_event_recorder *event_recorder; |
722 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 723 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 724 | struct cds_hlist_head *head; |
576599a0 | 725 | int ret = 0; |
32ce8569 MD |
726 | int notify_socket, loglevel; |
727 | const char *uri; | |
8020ceb5 | 728 | |
e7bc0ef6 | 729 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 730 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 731 | |
bdb12629 | 732 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
733 | if (notify_socket < 0) { |
734 | ret = notify_socket; | |
735 | goto socket_error; | |
736 | } | |
737 | ||
53569322 MD |
738 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
739 | session); | |
c785c634 MD |
740 | if (ret < 0) { |
741 | DBG("Error (%d) adding enum to session", ret); | |
742 | goto create_enum_error; | |
743 | } | |
744 | ||
457a6b58 MD |
745 | /* |
746 | * Check if loglevel match. Refuse to connect event if not. | |
747 | */ | |
2e70391c MD |
748 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
749 | if (!event_recorder) { | |
576599a0 | 750 | ret = -ENOMEM; |
8020ceb5 | 751 | goto cache_error; |
576599a0 | 752 | } |
2e70391c | 753 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 754 | |
7ee76145 | 755 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 756 | if (!event_recorder->parent) { |
80333dfa MD |
757 | ret = -ENOMEM; |
758 | goto parent_error; | |
759 | } | |
7ee76145 | 760 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 761 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 762 | event_recorder->parent->child = event_recorder; |
80333dfa | 763 | |
2e70391c MD |
764 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
765 | if (!event_recorder_priv) { | |
68bb7559 MD |
766 | ret = -ENOMEM; |
767 | goto priv_error; | |
768 | } | |
2e70391c MD |
769 | event_recorder->priv = event_recorder_priv; |
770 | event_recorder_priv->pub = event_recorder; | |
771 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
772 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 773 | |
2e70391c | 774 | event_recorder->chan = chan; |
e58095ef | 775 | |
ac6b4ac6 | 776 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 777 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
778 | event_recorder->parent->enabled = 0; |
779 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 780 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
781 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
782 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
783 | |
784 | if (desc->loglevel) | |
2e70391c | 785 | loglevel = *(*event_recorder->parent->priv->desc->loglevel); |
32ce8569 MD |
786 | else |
787 | loglevel = TRACE_DEFAULT; | |
dc11f93f MD |
788 | if (desc->model_emf_uri) |
789 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
790 | else |
791 | uri = NULL; | |
792 | ||
5b4c6da4 MD |
793 | lttng_ust_format_event_name(desc, name); |
794 | ||
13b21cd6 MD |
795 | /* Fetch event ID from sessiond */ |
796 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 797 | session, |
bdb12629 | 798 | session->priv->objd, |
e7bc0ef6 | 799 | chan->priv->parent.objd, |
5b4c6da4 | 800 | name, |
13b21cd6 MD |
801 | loglevel, |
802 | desc->signature, | |
803 | desc->nr_fields, | |
804 | desc->fields, | |
805 | uri, | |
8936b6c0 | 806 | &event_recorder->priv->id); |
13b21cd6 MD |
807 | if (ret < 0) { |
808 | DBG("Error (%d) registering event to sessiond", ret); | |
809 | goto sessiond_register_error; | |
32ce8569 | 810 | } |
2b213b16 | 811 | |
e7bc0ef6 | 812 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 813 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 814 | return 0; |
8020ceb5 | 815 | |
32ce8569 | 816 | sessiond_register_error: |
2e70391c | 817 | free(event_recorder_priv); |
68bb7559 | 818 | priv_error: |
2e70391c | 819 | free(event_recorder->parent); |
80333dfa | 820 | parent_error: |
2e70391c | 821 | free(event_recorder); |
8020ceb5 | 822 | cache_error: |
c785c634 | 823 | create_enum_error: |
32ce8569 | 824 | socket_error: |
576599a0 | 825 | return ret; |
8020ceb5 MD |
826 | } |
827 | ||
d8d2416d | 828 | static |
4e48b5d2 | 829 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 830 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
831 | struct lttng_event_notifier_group *event_notifier_group) |
832 | { | |
d7d45c0d | 833 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 834 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
835 | struct cds_hlist_head *head; |
836 | int ret = 0; | |
837 | ||
838 | /* | |
839 | * Get the hashtable bucket the created lttng_event_notifier object | |
840 | * should be inserted. | |
841 | */ | |
842 | head = borrow_hash_table_bucket( | |
843 | event_notifier_group->event_notifiers_ht.table, | |
844 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
845 | ||
d7d45c0d | 846 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
847 | if (!event_notifier) { |
848 | ret = -ENOMEM; | |
849 | goto error; | |
850 | } | |
d7d45c0d | 851 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 852 | |
115db533 MD |
853 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
854 | if (!event_notifier->parent) { | |
855 | ret = -ENOMEM; | |
856 | goto parent_error; | |
857 | } | |
858 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 859 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 860 | event_notifier->parent->child = event_notifier; |
115db533 MD |
861 | |
862 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
863 | if (!event_notifier_priv) { | |
864 | ret = -ENOMEM; | |
865 | goto priv_error; | |
866 | } | |
867 | event_notifier->priv = event_notifier_priv; | |
868 | event_notifier_priv->pub = event_notifier; | |
869 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
870 | event_notifier_priv->parent.pub = event_notifier->parent; | |
871 | ||
872 | event_notifier_priv->group = event_notifier_group; | |
873 | event_notifier_priv->parent.user_token = token; | |
874 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
875 | |
876 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 877 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
878 | event_notifier->parent->enabled = 0; |
879 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 880 | |
a2e4d05e MD |
881 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
882 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
883 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
884 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 885 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 886 | |
115db533 | 887 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 888 | &event_notifier_group->event_notifiers_head); |
115db533 | 889 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
890 | |
891 | return 0; | |
892 | ||
115db533 MD |
893 | priv_error: |
894 | free(event_notifier->parent); | |
895 | parent_error: | |
896 | free(event_notifier); | |
d8d2416d FD |
897 | error: |
898 | return ret; | |
899 | } | |
900 | ||
e58095ef | 901 | static |
4e48b5d2 | 902 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
903 | struct lttng_enabler *enabler) |
904 | { | |
5b4c6da4 | 905 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 906 | int loglevel = 0; |
7e2e405c | 907 | unsigned int has_loglevel = 0; |
e58095ef | 908 | |
5b4c6da4 | 909 | lttng_ust_format_event_name(desc, name); |
e450e339 | 910 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 911 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 912 | name, SIZE_MAX)) |
e58095ef MD |
913 | return 0; |
914 | if (desc->loglevel) { | |
915 | loglevel = *(*desc->loglevel); | |
916 | has_loglevel = 1; | |
917 | } | |
918 | if (!lttng_loglevel_match(loglevel, | |
919 | has_loglevel, | |
920 | enabler->event_param.loglevel_type, | |
921 | enabler->event_param.loglevel)) | |
922 | return 0; | |
923 | return 1; | |
924 | } | |
925 | ||
926 | static | |
4e48b5d2 | 927 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
928 | struct lttng_enabler *enabler) |
929 | { | |
5b4c6da4 | 930 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
931 | int loglevel = 0; |
932 | unsigned int has_loglevel = 0; | |
933 | ||
5b4c6da4 | 934 | lttng_ust_format_event_name(desc, name); |
e450e339 | 935 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 936 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
937 | return 0; |
938 | if (desc->loglevel) { | |
939 | loglevel = *(*desc->loglevel); | |
940 | has_loglevel = 1; | |
941 | } | |
942 | if (!lttng_loglevel_match(loglevel, | |
943 | has_loglevel, | |
944 | enabler->event_param.loglevel_type, | |
945 | enabler->event_param.loglevel)) | |
946 | return 0; | |
947 | return 1; | |
948 | } | |
949 | ||
950 | static | |
4e48b5d2 | 951 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
952 | struct lttng_enabler *enabler) |
953 | { | |
e450e339 FD |
954 | switch (enabler->format_type) { |
955 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
956 | { |
957 | struct lttng_ust_excluder_node *excluder; | |
958 | ||
959 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
960 | return 0; | |
961 | } | |
962 | ||
963 | /* | |
964 | * If the matching event matches with an excluder, | |
965 | * return 'does not match' | |
966 | */ | |
967 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
968 | int count; | |
969 | ||
970 | for (count = 0; count < excluder->excluder.count; count++) { | |
971 | int len; | |
972 | char *excluder_name; | |
973 | ||
974 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
975 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
976 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
977 | if (len > 0) { |
978 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
979 | ||
980 | lttng_ust_format_event_name(desc, name); | |
981 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
982 | return 0; | |
983 | } | |
984 | } | |
ed5b5bbd JI |
985 | } |
986 | } | |
196ec2df | 987 | return 1; |
ed5b5bbd | 988 | } |
e450e339 | 989 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
990 | return lttng_desc_match_event_enabler(desc, enabler); |
991 | default: | |
992 | return -EINVAL; | |
993 | } | |
994 | } | |
995 | ||
996 | static | |
d871c65b | 997 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 998 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 999 | { |
2e70391c | 1000 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 1001 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 1002 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
1003 | return 1; |
1004 | else | |
1005 | return 0; | |
e58095ef MD |
1006 | } |
1007 | ||
d8d2416d FD |
1008 | static |
1009 | int lttng_event_notifier_enabler_match_event_notifier( | |
1010 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1011 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1012 | { |
115db533 | 1013 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1014 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1015 | ||
115db533 MD |
1016 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1017 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1018 | return 1; |
1019 | else | |
1020 | return 0; | |
1021 | } | |
1022 | ||
e58095ef | 1023 | static |
d871c65b FD |
1024 | struct lttng_enabler_ref *lttng_enabler_ref( |
1025 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1026 | struct lttng_enabler *enabler) |
1027 | { | |
1028 | struct lttng_enabler_ref *enabler_ref; | |
1029 | ||
d871c65b | 1030 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1031 | if (enabler_ref->ref == enabler) |
1032 | return enabler_ref; | |
1033 | } | |
1034 | return NULL; | |
1035 | } | |
1036 | ||
8020ceb5 | 1037 | /* |
e58095ef MD |
1038 | * Create struct lttng_event if it is missing and present in the list of |
1039 | * tracepoint probes. | |
8020ceb5 | 1040 | */ |
e58095ef | 1041 | static |
ba99fbe2 | 1042 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1043 | { |
e7bc0ef6 | 1044 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
4e48b5d2 MD |
1045 | struct lttng_ust_registered_probe *reg_probe; |
1046 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1047 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1048 | int i; |
1049 | struct cds_list_head *probe_list; | |
1050 | ||
1051 | probe_list = lttng_get_probe_list_head(); | |
1052 | /* | |
1053 | * For each probe event, if we find that a probe event matches | |
1054 | * our enabler, create an associated lttng_event if not | |
1055 | * already present. | |
1056 | */ | |
4e48b5d2 MD |
1057 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1058 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1059 | ||
e58095ef | 1060 | for (i = 0; i < probe_desc->nr_events; i++) { |
98a97f24 FD |
1061 | int ret; |
1062 | bool found = false; | |
d56fa719 MD |
1063 | struct cds_hlist_head *head; |
1064 | struct cds_hlist_node *node; | |
e58095ef MD |
1065 | |
1066 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1067 | if (!lttng_desc_match_enabler(desc, |
1068 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1069 | continue; |
1070 | ||
fb470188 | 1071 | head = borrow_hash_table_bucket( |
bdb12629 | 1072 | session->priv->events_ht.table, |
fb470188 FD |
1073 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1074 | ||
2e70391c MD |
1075 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1076 | if (event_recorder_priv->parent.desc == desc | |
1077 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1078 | found = true; |
3140bffe FD |
1079 | break; |
1080 | } | |
e58095ef MD |
1081 | } |
1082 | if (found) | |
1083 | continue; | |
1084 | ||
1085 | /* | |
1086 | * We need to create an event for this | |
1087 | * event probe. | |
1088 | */ | |
2e70391c | 1089 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1090 | event_enabler->chan); |
e58095ef | 1091 | if (ret) { |
5b4c6da4 MD |
1092 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1093 | probe_desc->provider_name, | |
1094 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1095 | } |
8165c8da | 1096 | } |
8020ceb5 | 1097 | } |
8020ceb5 MD |
1098 | } |
1099 | ||
a44d07da | 1100 | static |
4e48b5d2 | 1101 | void probe_provider_event_for_each(const struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1102 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1103 | { |
1104 | struct cds_hlist_node *node, *tmp_node; | |
1105 | struct cds_list_head *sessionsp; | |
a44d07da | 1106 | unsigned int i; |
35ac38cb FD |
1107 | |
1108 | /* Get handle on list of sessions. */ | |
7753d283 | 1109 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1110 | |
1111 | /* | |
a44d07da FD |
1112 | * Iterate over all events in the probe provider descriptions and |
1113 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1114 | */ |
1115 | for (i = 0; i < provider_desc->nr_events; i++) { | |
4e48b5d2 | 1116 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1117 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1118 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1119 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1120 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1121 | struct cds_hlist_head *head; |
35ac38cb FD |
1122 | |
1123 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1124 | |
a44d07da FD |
1125 | /* |
1126 | * Iterate over all session to find the current event | |
1127 | * description. | |
1128 | */ | |
bdb12629 | 1129 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1130 | /* |
a44d07da FD |
1131 | * Get the list of events in the hashtable bucket and |
1132 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1133 | */ |
fb470188 | 1134 | head = borrow_hash_table_bucket( |
bdb12629 | 1135 | session_priv->events_ht.table, |
fb470188 FD |
1136 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1137 | ||
2e70391c MD |
1138 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1139 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1140 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1141 | break; |
1142 | } | |
1143 | } | |
1144 | } | |
d8d2416d FD |
1145 | |
1146 | /* | |
1147 | * Iterate over all event_notifier groups to find the current event | |
1148 | * description. | |
1149 | */ | |
1150 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1151 | /* | |
1152 | * Get the list of event_notifiers in the hashtable bucket and | |
1153 | * iterate to find the event_notifier matching this | |
1154 | * descriptor. | |
1155 | */ | |
1156 | head = borrow_hash_table_bucket( | |
1157 | event_notifier_group->event_notifiers_ht.table, | |
1158 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1159 | ||
115db533 MD |
1160 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1161 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1162 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1163 | break; |
1164 | } | |
1165 | } | |
1166 | } | |
35ac38cb | 1167 | } |
a44d07da FD |
1168 | } |
1169 | ||
1170 | static | |
ba99fbe2 | 1171 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1172 | { |
a44d07da | 1173 | |
ba99fbe2 MD |
1174 | switch (event->type) { |
1175 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1176 | { | |
1177 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1178 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1179 | unsigned int i; |
1180 | ||
1181 | /* Destroy enums of the current event. */ | |
1182 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
4e48b5d2 MD |
1183 | const struct lttng_ust_enum_desc *enum_desc; |
1184 | const struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1185 | struct lttng_enum *curr_enum; |
1186 | ||
25cff019 | 1187 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1188 | switch (field->type->type) { |
1189 | case lttng_ust_type_enum: | |
1190 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1191 | break; |
1192 | default: | |
1193 | continue; | |
1194 | } | |
a44d07da | 1195 | |
ba99fbe2 MD |
1196 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1197 | if (curr_enum) { | |
1198 | _lttng_enum_destroy(curr_enum); | |
1199 | } | |
a44d07da | 1200 | } |
ba99fbe2 MD |
1201 | break; |
1202 | } | |
1203 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1204 | break; | |
1205 | default: | |
1206 | abort(); | |
a44d07da | 1207 | } |
a44d07da | 1208 | /* Destroy event. */ |
ba99fbe2 | 1209 | _lttng_event_destroy(event); |
a44d07da FD |
1210 | } |
1211 | ||
1212 | /* | |
1213 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1214 | * the probe provider descriptor received as argument. Must me called with the | |
1215 | * ust_lock held. | |
1216 | */ | |
1217 | void lttng_probe_provider_unregister_events( | |
4e48b5d2 | 1218 | const struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1219 | { |
1220 | /* | |
1221 | * Iterate over all events in the probe provider descriptions and sessions | |
1222 | * to queue the unregistration of the events. | |
1223 | */ | |
ba99fbe2 | 1224 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1225 | |
1226 | /* Wait for grace period. */ | |
b653ddc1 | 1227 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1228 | /* Prune the unregistration queue. */ |
d10a2205 | 1229 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1230 | |
1231 | /* | |
1232 | * It is now safe to destroy the events and remove them from the event list | |
1233 | * and hashtables. | |
1234 | */ | |
ba99fbe2 | 1235 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1236 | } |
1237 | ||
8020ceb5 | 1238 | /* |
d8d2416d | 1239 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1240 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1241 | */ |
1242 | static | |
ba99fbe2 | 1243 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1244 | { |
e7bc0ef6 | 1245 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1246 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1247 | |
d871c65b | 1248 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1249 | goto end; |
1250 | ||
e58095ef | 1251 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1252 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1253 | |
1254 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1255 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1256 | struct lttng_enabler_ref *enabler_ref; |
1257 | ||
2e70391c | 1258 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1259 | continue; |
1260 | ||
2e70391c | 1261 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1262 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1263 | if (!enabler_ref) { |
1264 | /* | |
1265 | * If no backward ref, create it. | |
1266 | * Add backward ref from event to enabler. | |
1267 | */ | |
1268 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1269 | if (!enabler_ref) | |
1270 | return -ENOMEM; | |
d871c65b FD |
1271 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1272 | event_enabler); | |
e58095ef | 1273 | cds_list_add(&enabler_ref->node, |
2e70391c | 1274 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1275 | } |
e58095ef MD |
1276 | |
1277 | /* | |
1278 | * Link filter bytecodes if not linked yet. | |
1279 | */ | |
2e70391c | 1280 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1281 | &session->priv->ctx, |
a2e4d05e | 1282 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1283 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1284 | |
1285 | /* TODO: merge event context. */ | |
1286 | } | |
de713d8a | 1287 | end: |
e58095ef MD |
1288 | return 0; |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * Called at library load: connect the probe on all enablers matching | |
1293 | * this event. | |
5f733922 | 1294 | * Called with session mutex held. |
e58095ef | 1295 | */ |
5f733922 | 1296 | int lttng_fix_pending_events(void) |
e58095ef | 1297 | { |
bdb12629 | 1298 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1299 | |
bdb12629 MD |
1300 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1301 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1302 | } |
e58095ef MD |
1303 | return 0; |
1304 | } | |
1305 | ||
d8d2416d FD |
1306 | int lttng_fix_pending_event_notifiers(void) |
1307 | { | |
1308 | struct lttng_event_notifier_group *event_notifier_group; | |
1309 | ||
1310 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1311 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1312 | } | |
1313 | return 0; | |
1314 | } | |
1315 | ||
246be17e | 1316 | /* |
37dddb65 MD |
1317 | * For each session of the owner thread, execute pending statedump. |
1318 | * Only dump state for the sessions owned by the caller thread, because | |
1319 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1320 | */ |
3327ac33 | 1321 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1322 | { |
bdb12629 | 1323 | struct lttng_ust_session_private *session_priv; |
246be17e | 1324 | |
37dddb65 | 1325 | /* Execute state dump */ |
cf73e0fe | 1326 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1327 | |
1328 | /* Clear pending state dump */ | |
3327ac33 MD |
1329 | if (ust_lock()) { |
1330 | goto end; | |
1331 | } | |
bdb12629 MD |
1332 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1333 | if (session_priv->owner != owner) | |
37dddb65 | 1334 | continue; |
bdb12629 | 1335 | if (!session_priv->statedump_pending) |
37dddb65 | 1336 | continue; |
bdb12629 | 1337 | session_priv->statedump_pending = 0; |
246be17e | 1338 | } |
3327ac33 | 1339 | end: |
37dddb65 | 1340 | ust_unlock(); |
3327ac33 | 1341 | return; |
246be17e PW |
1342 | } |
1343 | ||
e58095ef | 1344 | static |
ba99fbe2 | 1345 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1346 | { |
1347 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1348 | ||
ba99fbe2 | 1349 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1350 | /* Free event enabler refs */ |
1351 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1352 | &event->priv->enablers_ref_head, node) |
e58095ef | 1353 | free(enabler_ref); |
ba99fbe2 MD |
1354 | |
1355 | switch (event->type) { | |
1356 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1357 | { | |
1358 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1359 | ||
1360 | /* Remove from event list. */ | |
1361 | cds_list_del(&event_recorder->priv->node); | |
1362 | /* Remove from event hash table. */ | |
1363 | cds_hlist_del(&event_recorder->priv->hlist); | |
1364 | ||
a40b5b8c | 1365 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1366 | free(event_recorder->parent); |
1367 | free(event_recorder->priv); | |
1368 | free(event_recorder); | |
1369 | break; | |
1370 | } | |
1371 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1372 | { | |
1373 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1374 | ||
1375 | /* Remove from event list. */ | |
1376 | cds_list_del(&event_notifier->priv->node); | |
1377 | /* Remove from event hash table. */ | |
1378 | cds_hlist_del(&event_notifier->priv->hlist); | |
1379 | ||
1380 | free(event_notifier->priv); | |
1381 | free(event_notifier->parent); | |
1382 | free(event_notifier); | |
1383 | break; | |
1384 | } | |
1385 | default: | |
1386 | abort(); | |
1387 | } | |
8020ceb5 MD |
1388 | } |
1389 | ||
c785c634 MD |
1390 | static |
1391 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1392 | { | |
1393 | cds_list_del(&_enum->node); | |
35ac38cb | 1394 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1395 | free(_enum); |
1396 | } | |
1397 | ||
fd17d7ce | 1398 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1399 | { |
bdb12629 | 1400 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1401 | |
bdb12629 MD |
1402 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1403 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1404 | } |
457a6b58 | 1405 | |
e58095ef MD |
1406 | /* |
1407 | * Enabler management. | |
1408 | */ | |
d871c65b FD |
1409 | struct lttng_event_enabler *lttng_event_enabler_create( |
1410 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1411 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1412 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1413 | { |
d871c65b | 1414 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1415 | |
d871c65b FD |
1416 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1417 | if (!event_enabler) | |
e58095ef | 1418 | return NULL; |
d871c65b FD |
1419 | event_enabler->base.format_type = format_type; |
1420 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1421 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1422 | memcpy(&event_enabler->base.event_param, event_param, | |
1423 | sizeof(event_enabler->base.event_param)); | |
1424 | event_enabler->chan = chan; | |
e58095ef | 1425 | /* ctx left NULL */ |
d871c65b | 1426 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1427 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1428 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1429 | |
1430 | return event_enabler; | |
457a6b58 MD |
1431 | } |
1432 | ||
d8d2416d FD |
1433 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1434 | struct lttng_event_notifier_group *event_notifier_group, | |
1435 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1436 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1437 | { |
1438 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1439 | ||
1440 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1441 | if (!event_notifier_enabler) | |
1442 | return NULL; | |
1443 | event_notifier_enabler->base.format_type = format_type; | |
1444 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1445 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1446 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1447 | ||
1448 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1449 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1450 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1451 | |
1452 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1453 | event_notifier_param->event.name, | |
1454 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1455 | event_notifier_enabler->base.event_param.instrumentation = | |
1456 | event_notifier_param->event.instrumentation; | |
1457 | event_notifier_enabler->base.event_param.loglevel = | |
1458 | event_notifier_param->event.loglevel; | |
1459 | event_notifier_enabler->base.event_param.loglevel_type = | |
1460 | event_notifier_param->event.loglevel_type; | |
1461 | ||
1462 | event_notifier_enabler->base.enabled = 0; | |
1463 | event_notifier_enabler->group = event_notifier_group; | |
1464 | ||
1465 | cds_list_add(&event_notifier_enabler->node, | |
1466 | &event_notifier_group->enablers_head); | |
1467 | ||
1468 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1469 | ||
1470 | return event_notifier_enabler; | |
1471 | } | |
1472 | ||
d871c65b | 1473 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1474 | { |
d871c65b | 1475 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1476 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1477 | |
e58095ef | 1478 | return 0; |
457a6b58 | 1479 | } |
457a6b58 | 1480 | |
d871c65b | 1481 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1482 | { |
d871c65b | 1483 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1484 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1485 | |
e58095ef MD |
1486 | return 0; |
1487 | } | |
457a6b58 | 1488 | |
d871c65b | 1489 | static |
a56fd376 | 1490 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1491 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1492 | { |
ab89263e MD |
1493 | (*bytecode)->enabler = enabler; |
1494 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1495 | /* Take ownership of bytecode */ | |
1496 | *bytecode = NULL; | |
d871c65b FD |
1497 | } |
1498 | ||
a56fd376 | 1499 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1500 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1501 | { |
a56fd376 | 1502 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1503 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1504 | ||
e7bc0ef6 | 1505 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1506 | return 0; |
0bfb5cbd JI |
1507 | } |
1508 | ||
d871c65b FD |
1509 | static |
1510 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1511 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1512 | { |
e9fe6aad MD |
1513 | (*excluder)->enabler = enabler; |
1514 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1515 | /* Take ownership of excluder */ | |
1516 | *excluder = NULL; | |
d871c65b FD |
1517 | } |
1518 | ||
1519 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1520 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1521 | { |
1522 | _lttng_enabler_attach_exclusion( | |
1523 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1524 | ||
e7bc0ef6 | 1525 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1526 | return 0; |
e58095ef | 1527 | } |
f488575f | 1528 | |
d8d2416d FD |
1529 | int lttng_event_notifier_enabler_enable( |
1530 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1531 | { | |
1532 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1533 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1534 | ||
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | int lttng_event_notifier_enabler_disable( | |
1539 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1540 | { | |
1541 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1542 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
a56fd376 | 1547 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1548 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1549 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1550 | { |
a56fd376 | 1551 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1552 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1553 | bytecode); | |
1554 | ||
1555 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1556 | return 0; | |
1557 | } | |
1558 | ||
d37ecb3f FD |
1559 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1560 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1561 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1562 | { |
49cde654 | 1563 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1564 | event_notifier_enabler); |
49cde654 | 1565 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1566 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1567 | /* Take ownership of bytecode */ |
1568 | *bytecode = NULL; | |
d37ecb3f FD |
1569 | event_notifier_enabler->num_captures++; |
1570 | ||
1571 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1572 | return 0; | |
1573 | } | |
1574 | ||
d8d2416d FD |
1575 | int lttng_event_notifier_enabler_attach_exclusion( |
1576 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1577 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1578 | { |
1579 | _lttng_enabler_attach_exclusion( | |
1580 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1581 | excluder); | |
1582 | ||
1583 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1584 | return 0; | |
1585 | } | |
1586 | ||
fd17d7ce MD |
1587 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1588 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1589 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1590 | { |
457a6b58 | 1591 | /* |
e58095ef MD |
1592 | * We cannot attach a context after trace has been started for a |
1593 | * session because the metadata does not allow expressing this | |
1594 | * information outside of the original channel scope. | |
457a6b58 | 1595 | */ |
bdb12629 | 1596 | if (session->priv->been_active) |
e58095ef | 1597 | return -EPERM; |
457a6b58 | 1598 | |
e58095ef | 1599 | switch (context_param->ctx) { |
fd17d7ce | 1600 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1601 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1602 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1603 | { |
fd17d7ce | 1604 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1605 | |
1606 | perf_ctx_param = &context_param->u.perf_counter; | |
1607 | return lttng_add_perf_counter_to_ctx( | |
1608 | perf_ctx_param->type, | |
1609 | perf_ctx_param->config, | |
1610 | perf_ctx_param->name, | |
1611 | ctx); | |
1612 | } | |
fd17d7ce | 1613 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1614 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1615 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1616 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1617 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1618 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1619 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1620 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1621 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1622 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1623 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1624 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1625 | ctx); | |
fd17d7ce | 1626 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1627 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1628 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1629 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1630 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1631 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1632 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1633 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1634 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1635 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1636 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1637 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1638 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1639 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1640 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1641 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1642 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1643 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1644 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1645 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1646 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1647 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1648 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1649 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1650 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1651 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1652 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1653 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1654 | default: |
1655 | return -EINVAL; | |
457a6b58 | 1656 | } |
457a6b58 MD |
1657 | } |
1658 | ||
2208d8b5 MJ |
1659 | int lttng_event_enabler_attach_context( |
1660 | struct lttng_event_enabler *enabler __attribute__((unused)), | |
1661 | struct lttng_ust_abi_context *context_param __attribute__((unused))) | |
457a6b58 | 1662 | { |
e58095ef | 1663 | return -ENOSYS; |
457a6b58 MD |
1664 | } |
1665 | ||
d871c65b | 1666 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1667 | { |
d871c65b FD |
1668 | if (!event_enabler) { |
1669 | return; | |
0f63324a | 1670 | } |
d871c65b | 1671 | cds_list_del(&event_enabler->node); |
0f63324a | 1672 | |
d871c65b | 1673 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1674 | |
d871c65b FD |
1675 | lttng_destroy_context(event_enabler->ctx); |
1676 | free(event_enabler); | |
457a6b58 MD |
1677 | } |
1678 | ||
e58095ef | 1679 | /* |
d871c65b | 1680 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1681 | * session. |
1682 | */ | |
457a6b58 | 1683 | static |
f69fe5fb | 1684 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1685 | { |
d871c65b | 1686 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1687 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1688 | |
bdb12629 | 1689 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1690 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1691 | /* |
1692 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1693 | * and its channel and session transient states are enabled, we |
1694 | * enable the event, else we disable it. | |
e58095ef | 1695 | */ |
2e70391c | 1696 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1697 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1698 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1699 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1700 | int nr_filters = 0; | |
e58095ef MD |
1701 | |
1702 | /* Enable events */ | |
1703 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1704 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1705 | if (enabler_ref->ref->enabled) { |
1706 | enabled = 1; | |
1707 | break; | |
1708 | } | |
1709 | } | |
ac6b4ac6 MD |
1710 | /* |
1711 | * Enabled state is based on union of enablers, with | |
1712 | * intesection of session and channel transient enable | |
1713 | * states. | |
1714 | */ | |
e7bc0ef6 | 1715 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1716 | |
2e70391c | 1717 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1718 | /* |
1719 | * Sync tracepoint registration with event enabled | |
1720 | * state. | |
1721 | */ | |
1722 | if (enabled) { | |
2e70391c | 1723 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1724 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1725 | } else { |
2e70391c | 1726 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1727 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1728 | } |
457a6b58 | 1729 | |
1f49fc05 | 1730 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1731 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1732 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1733 | if (enabler_ref->ref->enabled |
1734 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1735 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1736 | break; |
1737 | } | |
1738 | } | |
a2e4d05e MD |
1739 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1740 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1741 | |
e58095ef MD |
1742 | /* Enable filters */ |
1743 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1744 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1745 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1746 | nr_filters++; |
457a6b58 | 1747 | } |
a2e4d05e MD |
1748 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1749 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1750 | } |
d10a2205 | 1751 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1752 | } |
1753 | ||
4296085e MD |
1754 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1755 | static | |
4e48b5d2 | 1756 | bool lttng_ust_probe_supports_event_notifier(const struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1757 | { |
1758 | return probe_desc->major >= 2; | |
1759 | } | |
1760 | ||
d8d2416d FD |
1761 | static |
1762 | void lttng_create_event_notifier_if_missing( | |
1763 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1764 | { | |
1765 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
4e48b5d2 | 1766 | struct lttng_ust_registered_probe *reg_probe; |
d8d2416d FD |
1767 | struct cds_list_head *probe_list; |
1768 | int i; | |
1769 | ||
1770 | probe_list = lttng_get_probe_list_head(); | |
1771 | ||
4e48b5d2 MD |
1772 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1773 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1774 | ||
d8d2416d FD |
1775 | for (i = 0; i < probe_desc->nr_events; i++) { |
1776 | int ret; | |
1777 | bool found = false; | |
4e48b5d2 | 1778 | const struct lttng_ust_event_desc *desc; |
115db533 | 1779 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1780 | struct cds_hlist_head *head; |
1781 | struct cds_hlist_node *node; | |
1782 | ||
1783 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1784 | |
d8d2416d FD |
1785 | if (!lttng_desc_match_enabler(desc, |
1786 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1787 | continue; | |
1788 | ||
1789 | /* | |
1790 | * Given the current event_notifier group, get the bucket that | |
1791 | * the target event_notifier would be if it was already | |
1792 | * created. | |
1793 | */ | |
1794 | head = borrow_hash_table_bucket( | |
1795 | event_notifier_group->event_notifiers_ht.table, | |
1796 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1797 | ||
115db533 | 1798 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1799 | /* |
1800 | * Check if event_notifier already exists by checking | |
1801 | * if the event_notifier and enabler share the same | |
1802 | * description and id. | |
1803 | */ | |
115db533 MD |
1804 | if (event_notifier_priv->parent.desc == desc && |
1805 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1806 | found = true; |
1807 | break; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | if (found) | |
1812 | continue; | |
1813 | ||
4296085e MD |
1814 | /* Check that the probe supports event notifiers, else report the error. */ |
1815 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
5b4c6da4 | 1816 | ERR("Probe \"%s\" contains event \"%s:%s\" which matches an enabled event notifier, " |
4296085e MD |
1817 | "but its version (%u.%u) is too old and does not implement event notifiers. " |
1818 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1819 | "this event will not generate any notification.", | |
5b4c6da4 MD |
1820 | probe_desc->provider_name, |
1821 | probe_desc->provider_name, desc->event_name, | |
4296085e MD |
1822 | probe_desc->major, |
1823 | probe_desc->minor); | |
1824 | continue; | |
1825 | } | |
d8d2416d FD |
1826 | /* |
1827 | * We need to create a event_notifier for this event probe. | |
1828 | */ | |
1829 | ret = lttng_event_notifier_create(desc, | |
1830 | event_notifier_enabler->user_token, | |
6566528b | 1831 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1832 | event_notifier_group); |
1833 | if (ret) { | |
5b4c6da4 MD |
1834 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1835 | probe_desc->provider_name, | |
1836 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1837 | } |
1838 | } | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | /* | |
1843 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1844 | */ | |
1845 | static | |
1846 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1847 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1848 | { | |
1849 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1850 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1851 | |
1852 | /* | |
1853 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1854 | * might still be attaching filter or exclusion to the | |
1855 | * event_notifier_enabler. | |
1856 | */ | |
1857 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1858 | goto end; | |
1859 | ||
1860 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1861 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1862 | ||
1863 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1864 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1865 | struct lttng_enabler_ref *enabler_ref; |
1866 | ||
115db533 | 1867 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1868 | continue; |
1869 | ||
115db533 | 1870 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1871 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1872 | if (!enabler_ref) { | |
1873 | /* | |
1874 | * If no backward ref, create it. | |
1875 | * Add backward ref from event_notifier to enabler. | |
1876 | */ | |
1877 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1878 | if (!enabler_ref) | |
1879 | return -ENOMEM; | |
1880 | ||
1881 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1882 | event_notifier_enabler); | |
1883 | cds_list_add(&enabler_ref->node, | |
115db533 | 1884 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1885 | } |
1886 | ||
1887 | /* | |
1888 | * Link filter bytecodes if not linked yet. | |
1889 | */ | |
115db533 | 1890 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1891 | &event_notifier_group->ctx, |
a2e4d05e | 1892 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1893 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1894 | |
1895 | /* | |
1896 | * Link capture bytecodes if not linked yet. | |
1897 | */ | |
115db533 | 1898 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1899 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1900 | &event_notifier_enabler->capture_bytecode_head); |
1901 | ||
115db533 | 1902 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1903 | } |
1904 | end: | |
1905 | return 0; | |
1906 | } | |
1907 | ||
1908 | static | |
1909 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1910 | { | |
1911 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1912 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1913 | |
1914 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1915 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1916 | ||
1917 | /* | |
1918 | * For each event_notifier, if at least one of its enablers is enabled, | |
1919 | * we enable the event_notifier, else we disable it. | |
1920 | */ | |
115db533 | 1921 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1922 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1923 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1924 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1925 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1926 | |
1927 | /* Enable event_notifiers */ | |
1928 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1929 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1930 | if (enabler_ref->ref->enabled) { |
1931 | enabled = 1; | |
1932 | break; | |
1933 | } | |
1934 | } | |
1935 | ||
115db533 | 1936 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1937 | /* |
1938 | * Sync tracepoint registration with event_notifier enabled | |
1939 | * state. | |
1940 | */ | |
1941 | if (enabled) { | |
115db533 | 1942 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1943 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1944 | } else { |
115db533 | 1945 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1946 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1947 | } |
1948 | ||
1949 | /* Check if has enablers without bytecode enabled */ | |
1950 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1951 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1952 | if (enabler_ref->ref->enabled |
1953 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1954 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1955 | break; |
1956 | } | |
1957 | } | |
a2e4d05e MD |
1958 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1959 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1960 | |
1961 | /* Enable filters */ | |
1962 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1963 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1964 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1965 | nr_filters++; |
d8d2416d | 1966 | } |
a2e4d05e MD |
1967 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1968 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1969 | |
1970 | /* Enable captures. */ | |
1971 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1972 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1973 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1974 | nr_captures++; |
d37ecb3f | 1975 | } |
a2e4d05e MD |
1976 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1977 | !!nr_captures); | |
d8d2416d | 1978 | } |
d10a2205 | 1979 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1980 | } |
1981 | ||
e58095ef MD |
1982 | /* |
1983 | * Apply enablers to session events, adding events to session if need | |
1984 | * be. It is required after each modification applied to an active | |
1985 | * session, and right before session "start". | |
1986 | * "lazy" sync means we only sync if required. | |
1987 | */ | |
1988 | static | |
f69fe5fb | 1989 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1990 | { |
e58095ef MD |
1991 | /* We can skip if session is not active */ |
1992 | if (!session->active) | |
1993 | return; | |
d871c65b | 1994 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1995 | } |
53569322 MD |
1996 | |
1997 | /* | |
1998 | * Update all sessions with the given app context. | |
1999 | * Called with ust lock held. | |
2000 | * This is invoked when an application context gets loaded/unloaded. It | |
2001 | * ensures the context callbacks are in sync with the application | |
2002 | * context (either app context callbacks, or dummy callbacks). | |
2003 | */ | |
2004 | void lttng_ust_context_set_session_provider(const char *name, | |
4e48b5d2 MD |
2005 | size_t (*get_size)(void *priv, size_t offset), |
2006 | void (*record)(void *priv, struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2007 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2008 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2009 | void *priv) | |
53569322 | 2010 | { |
bdb12629 | 2011 | struct lttng_ust_session_private *session_priv; |
53569322 | 2012 | |
bdb12629 | 2013 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2014 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2015 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2016 | int ret; |
2017 | ||
bdb12629 | 2018 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
4e48b5d2 | 2019 | name, get_size, record, get_value, priv); |
53569322 MD |
2020 | if (ret) |
2021 | abort(); | |
bdb12629 | 2022 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2023 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
4e48b5d2 | 2024 | name, get_size, record, get_value, priv); |
53569322 MD |
2025 | if (ret) |
2026 | abort(); | |
2027 | } | |
2e70391c | 2028 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2029 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
4e48b5d2 | 2030 | name, get_size, record, get_value, priv); |
53569322 MD |
2031 | if (ret) |
2032 | abort(); | |
2033 | } | |
2034 | } | |
2035 | } | |
d8d2416d FD |
2036 | |
2037 | /* | |
2038 | * Update all event_notifier groups with the given app context. | |
2039 | * Called with ust lock held. | |
2040 | * This is invoked when an application context gets loaded/unloaded. It | |
2041 | * ensures the context callbacks are in sync with the application | |
2042 | * context (either app context callbacks, or dummy callbacks). | |
2043 | */ | |
2044 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
4e48b5d2 MD |
2045 | size_t (*get_size)(void *priv, size_t offset), |
2046 | void (*record)(void *priv, struct lttng_ust_lib_ring_buffer_ctx *ctx, | |
e7bc0ef6 | 2047 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2048 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2049 | void *priv) | |
d8d2416d FD |
2050 | { |
2051 | struct lttng_event_notifier_group *event_notifier_group; | |
2052 | ||
2053 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2054 | int ret; | |
2055 | ||
2056 | ret = lttng_ust_context_set_provider_rcu( | |
2057 | &event_notifier_group->ctx, | |
4e48b5d2 | 2058 | name, get_size, record, get_value, priv); |
d8d2416d FD |
2059 | if (ret) |
2060 | abort(); | |
2061 | } | |
2062 | } | |
9daacd1a MD |
2063 | |
2064 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2065 | unsigned char *uuid) | |
2066 | { | |
2067 | if (!session) | |
2068 | return 0; | |
2069 | /* Compare UUID with session. */ | |
2070 | if (session->priv->uuid_set) { | |
2071 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2072 | return -1; | |
2073 | } | |
2074 | } else { | |
2075 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2076 | session->priv->uuid_set = true; | |
2077 | } | |
2078 | return 0; | |
2079 | ||
2080 | } |