Commit | Line | Data |
---|---|---|
8020ceb5 MD |
1 | /* |
2 | * ltt-events.c | |
3 | * | |
4 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * Holds LTTng per-session event registry. | |
7 | * | |
8 | * Dual LGPL v2.1/GPL v2 license. | |
9 | */ | |
10 | ||
b5234c06 MD |
11 | #define _GNU_SOURCE |
12 | #include <stdio.h> | |
8a98a75d | 13 | #include <endian.h> |
b5234c06 | 14 | #include <urcu/list.h> |
8165c8da | 15 | #include <urcu/hlist.h> |
b5234c06 | 16 | #include <pthread.h> |
b5234c06 | 17 | #include <uuid/uuid.h> |
b5234c06 | 18 | #include <errno.h> |
f4681817 MD |
19 | #include <sys/shm.h> |
20 | #include <sys/ipc.h> | |
44c72f10 MD |
21 | #include <stdint.h> |
22 | #include <stddef.h> | |
28b12049 MD |
23 | #include <inttypes.h> |
24 | #include <time.h> | |
25 | #include "clock.h" | |
44c72f10 MD |
26 | |
27 | #include <urcu-bp.h> | |
28 | #include <urcu/compiler.h> | |
29 | #include <urcu/uatomic.h> | |
30 | #include <urcu/arch.h> | |
31 | ||
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 MD |
34 | |
35 | #include <usterr-signal-safe.h> | |
36 | #include <helper.h> | |
1f18504e | 37 | #include "error.h" |
44c72f10 | 38 | |
8020ceb5 | 39 | #include "ltt-tracer.h" |
8165c8da | 40 | #include "ltt-tracer-core.h" |
b728d87e | 41 | #include "wait.h" |
8d8a24c8 | 42 | #include "../libringbuffer/shm.h" |
596c4223 | 43 | #include "jhash.h" |
8165c8da MD |
44 | |
45 | /* | |
46 | * The sessions mutex is the centralized mutex across UST tracing | |
17dfb34b MD |
47 | * control and probe registration. All operations within this file are |
48 | * called by the communication thread, under ust_lock protection. | |
8165c8da | 49 | */ |
2b2d6ff7 | 50 | static pthread_mutex_t sessions_mutex = PTHREAD_MUTEX_INITIALIZER; |
8165c8da | 51 | |
17dfb34b | 52 | void ust_lock(void) |
8165c8da MD |
53 | { |
54 | pthread_mutex_lock(&sessions_mutex); | |
55 | } | |
56 | ||
17dfb34b | 57 | void ust_unlock(void) |
8165c8da MD |
58 | { |
59 | pthread_mutex_unlock(&sessions_mutex); | |
60 | } | |
61 | ||
b5234c06 | 62 | static CDS_LIST_HEAD(sessions); |
8165c8da MD |
63 | |
64 | /* | |
65 | * Pending probes hash table, containing the registered ltt events for | |
66 | * which tracepoint probes are still missing. Protected by the sessions | |
67 | * mutex. | |
68 | */ | |
69 | #define PENDING_PROBE_HASH_BITS 6 | |
70 | #define PENDING_PROBE_HASH_SIZE (1 << PENDING_PROBE_HASH_BITS) | |
71 | static struct cds_hlist_head pending_probe_table[PENDING_PROBE_HASH_SIZE]; | |
72 | ||
73 | struct ust_pending_probe { | |
74 | struct ltt_event *event; | |
75 | struct cds_hlist_node node; | |
76 | char name[]; | |
77 | }; | |
8020ceb5 MD |
78 | |
79 | static void _ltt_event_destroy(struct ltt_event *event); | |
e6c12e3d | 80 | static void _ltt_wildcard_destroy(struct session_wildcard *sw); |
8020ceb5 MD |
81 | static void _ltt_channel_destroy(struct ltt_channel *chan); |
82 | static int _ltt_event_unregister(struct ltt_event *event); | |
83 | static | |
84 | int _ltt_event_metadata_statedump(struct ltt_session *session, | |
85 | struct ltt_channel *chan, | |
86 | struct ltt_event *event); | |
87 | static | |
88 | int _ltt_session_metadata_statedump(struct ltt_session *session); | |
89 | ||
8165c8da MD |
90 | /* |
91 | * called at event creation if probe is missing. | |
92 | * called with session mutex held. | |
93 | */ | |
94 | static | |
95 | int add_pending_probe(struct ltt_event *event, const char *name) | |
96 | { | |
97 | struct cds_hlist_head *head; | |
8165c8da | 98 | struct ust_pending_probe *e; |
ff412fb5 MD |
99 | size_t name_len = strlen(name); |
100 | uint32_t hash; | |
8165c8da | 101 | |
ff412fb5 MD |
102 | if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) { |
103 | WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1); | |
104 | name_len = LTTNG_UST_SYM_NAME_LEN - 1; | |
105 | } | |
106 | hash = jhash(name, name_len, 0); | |
8165c8da MD |
107 | head = &pending_probe_table[hash & (PENDING_PROBE_HASH_SIZE - 1)]; |
108 | e = zmalloc(sizeof(struct ust_pending_probe) + name_len); | |
109 | if (!e) | |
110 | return -ENOMEM; | |
ff412fb5 MD |
111 | memcpy(&e->name[0], name, name_len + 1); |
112 | e->name[name_len] = '\0'; | |
8165c8da MD |
113 | cds_hlist_add_head(&e->node, head); |
114 | e->event = event; | |
115 | event->pending_probe = e; | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* | |
120 | * remove a pending probe. called when at event teardown and when an | |
121 | * event is fixed (probe is loaded). | |
122 | * called with session mutex held. | |
123 | */ | |
124 | static | |
125 | void remove_pending_probe(struct ust_pending_probe *e) | |
126 | { | |
127 | if (!e) | |
128 | return; | |
129 | cds_hlist_del(&e->node); | |
130 | free(e); | |
131 | } | |
132 | ||
133 | /* | |
134 | * Called at library load: connect the probe on the events pending on | |
135 | * probe load. | |
136 | * called with session mutex held. | |
137 | */ | |
138 | int pending_probe_fix_events(const struct lttng_event_desc *desc) | |
139 | { | |
140 | struct cds_hlist_head *head; | |
141 | struct cds_hlist_node *node, *p; | |
142 | struct ust_pending_probe *e; | |
143 | const char *name = desc->name; | |
8165c8da | 144 | int ret = 0; |
7ee3cc56 | 145 | struct lttng_ust_event event_param; |
ff412fb5 MD |
146 | size_t name_len = strlen(name); |
147 | uint32_t hash; | |
8165c8da | 148 | |
e6c12e3d MD |
149 | /* Wildcard */ |
150 | { | |
151 | struct wildcard_entry *wildcard; | |
152 | ||
51c5df09 | 153 | /* TODO: check if loglevel match */ |
e6c12e3d MD |
154 | wildcard = match_wildcard(desc->name); |
155 | if (strcmp(desc->name, "lttng_ust:metadata") && wildcard) { | |
156 | struct session_wildcard *sw; | |
157 | ||
158 | cds_list_for_each_entry(sw, &wildcard->session_list, | |
159 | session_list) { | |
160 | struct ltt_event *ev; | |
161 | int ret; | |
162 | ||
163 | memcpy(&event_param, &sw->event_param, | |
164 | sizeof(event_param)); | |
165 | memcpy(event_param.name, | |
166 | desc->name, | |
167 | sizeof(event_param.name)); | |
168 | /* create event */ | |
169 | ret = ltt_event_create(sw->chan, | |
170 | &event_param, NULL, | |
171 | &ev); | |
172 | if (ret) { | |
173 | DBG("Error creating event"); | |
174 | continue; | |
175 | } | |
176 | cds_list_add(&ev->wildcard_list, | |
177 | &sw->events); | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
ff412fb5 MD |
182 | if (name_len > LTTNG_UST_SYM_NAME_LEN - 1) { |
183 | WARN("Truncating tracepoint name %s which exceeds size limits of %u chars", name, LTTNG_UST_SYM_NAME_LEN - 1); | |
184 | name_len = LTTNG_UST_SYM_NAME_LEN - 1; | |
185 | } | |
186 | hash = jhash(name, name_len, 0); | |
8165c8da MD |
187 | head = &pending_probe_table[hash & (PENDING_PROBE_HASH_SIZE - 1)]; |
188 | cds_hlist_for_each_entry_safe(e, node, p, head, node) { | |
189 | struct ltt_event *event; | |
190 | struct ltt_channel *chan; | |
191 | ||
51c5df09 | 192 | /* TODO: check if loglevel match */ |
ff412fb5 | 193 | if (strncmp(name, e->name, LTTNG_UST_SYM_NAME_LEN - 1)) |
8165c8da MD |
194 | continue; |
195 | event = e->event; | |
196 | chan = event->chan; | |
197 | assert(!event->desc); | |
198 | event->desc = desc; | |
199 | event->pending_probe = NULL; | |
200 | remove_pending_probe(e); | |
201 | ret |= __tracepoint_probe_register(name, | |
202 | event->desc->probe_callback, | |
203 | event); | |
636c5aa4 MD |
204 | if (ret) |
205 | continue; | |
206 | event->id = chan->free_event_id++; | |
8165c8da MD |
207 | ret |= _ltt_event_metadata_statedump(chan->session, chan, |
208 | event); | |
209 | } | |
210 | return ret; | |
211 | } | |
212 | ||
8020ceb5 MD |
213 | void synchronize_trace(void) |
214 | { | |
8020ceb5 | 215 | synchronize_rcu(); |
8020ceb5 MD |
216 | } |
217 | ||
218 | struct ltt_session *ltt_session_create(void) | |
219 | { | |
220 | struct ltt_session *session; | |
221 | ||
b5234c06 | 222 | session = zmalloc(sizeof(struct ltt_session)); |
8020ceb5 MD |
223 | if (!session) |
224 | return NULL; | |
b5234c06 MD |
225 | CDS_INIT_LIST_HEAD(&session->chan); |
226 | CDS_INIT_LIST_HEAD(&session->events); | |
e6c12e3d | 227 | CDS_INIT_LIST_HEAD(&session->wildcards); |
b5234c06 MD |
228 | uuid_generate(session->uuid); |
229 | cds_list_add(&session->list, &sessions); | |
8020ceb5 MD |
230 | return session; |
231 | } | |
232 | ||
233 | void ltt_session_destroy(struct ltt_session *session) | |
234 | { | |
235 | struct ltt_channel *chan, *tmpchan; | |
236 | struct ltt_event *event, *tmpevent; | |
e6c12e3d | 237 | struct session_wildcard *wildcard, *tmpwildcard; |
8020ceb5 MD |
238 | int ret; |
239 | ||
b5234c06 MD |
240 | CMM_ACCESS_ONCE(session->active) = 0; |
241 | cds_list_for_each_entry(event, &session->events, list) { | |
8020ceb5 MD |
242 | ret = _ltt_event_unregister(event); |
243 | WARN_ON(ret); | |
244 | } | |
245 | synchronize_trace(); /* Wait for in-flight events to complete */ | |
e6c12e3d MD |
246 | cds_list_for_each_entry_safe(wildcard, tmpwildcard, &session->wildcards, list) |
247 | _ltt_wildcard_destroy(wildcard); | |
b5234c06 | 248 | cds_list_for_each_entry_safe(event, tmpevent, &session->events, list) |
8020ceb5 | 249 | _ltt_event_destroy(event); |
b5234c06 | 250 | cds_list_for_each_entry_safe(chan, tmpchan, &session->chan, list) |
8020ceb5 | 251 | _ltt_channel_destroy(chan); |
b5234c06 | 252 | cds_list_del(&session->list); |
b5234c06 | 253 | free(session); |
8020ceb5 MD |
254 | } |
255 | ||
976fe9ea | 256 | int ltt_session_enable(struct ltt_session *session) |
8020ceb5 MD |
257 | { |
258 | int ret = 0; | |
259 | struct ltt_channel *chan; | |
260 | ||
8020ceb5 MD |
261 | if (session->active) { |
262 | ret = -EBUSY; | |
263 | goto end; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Snapshot the number of events per channel to know the type of header | |
268 | * we need to use. | |
269 | */ | |
b5234c06 | 270 | cds_list_for_each_entry(chan, &session->chan, list) { |
8020ceb5 MD |
271 | if (chan->header_type) |
272 | continue; /* don't change it if session stop/restart */ | |
273 | if (chan->free_event_id < 31) | |
274 | chan->header_type = 1; /* compact */ | |
275 | else | |
276 | chan->header_type = 2; /* large */ | |
277 | } | |
278 | ||
b5234c06 MD |
279 | CMM_ACCESS_ONCE(session->active) = 1; |
280 | CMM_ACCESS_ONCE(session->been_active) = 1; | |
8020ceb5 | 281 | ret = _ltt_session_metadata_statedump(session); |
4b4de73e | 282 | if (ret) |
b5234c06 | 283 | CMM_ACCESS_ONCE(session->active) = 0; |
8020ceb5 | 284 | end: |
8020ceb5 MD |
285 | return ret; |
286 | } | |
287 | ||
976fe9ea | 288 | int ltt_session_disable(struct ltt_session *session) |
8020ceb5 MD |
289 | { |
290 | int ret = 0; | |
291 | ||
8020ceb5 MD |
292 | if (!session->active) { |
293 | ret = -EBUSY; | |
294 | goto end; | |
295 | } | |
b5234c06 | 296 | CMM_ACCESS_ONCE(session->active) = 0; |
8020ceb5 | 297 | end: |
8020ceb5 MD |
298 | return ret; |
299 | } | |
300 | ||
976fe9ea MD |
301 | int ltt_channel_enable(struct ltt_channel *channel) |
302 | { | |
303 | int old; | |
304 | ||
9beb36ba MD |
305 | if (channel == channel->session->metadata) |
306 | return -EPERM; | |
b5234c06 | 307 | old = uatomic_xchg(&channel->enabled, 1); |
976fe9ea MD |
308 | if (old) |
309 | return -EEXIST; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | int ltt_channel_disable(struct ltt_channel *channel) | |
314 | { | |
315 | int old; | |
316 | ||
9beb36ba MD |
317 | if (channel == channel->session->metadata) |
318 | return -EPERM; | |
b5234c06 | 319 | old = uatomic_xchg(&channel->enabled, 0); |
976fe9ea MD |
320 | if (!old) |
321 | return -EEXIST; | |
322 | return 0; | |
323 | } | |
324 | ||
325 | int ltt_event_enable(struct ltt_event *event) | |
326 | { | |
327 | int old; | |
328 | ||
9beb36ba MD |
329 | if (event->chan == event->chan->session->metadata) |
330 | return -EPERM; | |
b5234c06 | 331 | old = uatomic_xchg(&event->enabled, 1); |
976fe9ea MD |
332 | if (old) |
333 | return -EEXIST; | |
334 | return 0; | |
335 | } | |
336 | ||
337 | int ltt_event_disable(struct ltt_event *event) | |
338 | { | |
339 | int old; | |
340 | ||
9beb36ba MD |
341 | if (event->chan == event->chan->session->metadata) |
342 | return -EPERM; | |
b5234c06 | 343 | old = uatomic_xchg(&event->enabled, 0); |
976fe9ea MD |
344 | if (!old) |
345 | return -EEXIST; | |
346 | return 0; | |
347 | } | |
348 | ||
8020ceb5 MD |
349 | struct ltt_channel *ltt_channel_create(struct ltt_session *session, |
350 | const char *transport_name, | |
351 | void *buf_addr, | |
352 | size_t subbuf_size, size_t num_subbuf, | |
353 | unsigned int switch_timer_interval, | |
193183fb | 354 | unsigned int read_timer_interval, |
ef9ff354 MD |
355 | int **shm_fd, int **wait_fd, |
356 | uint64_t **memory_map_size, | |
d028eddb | 357 | struct ltt_channel *chan_priv_init) |
8020ceb5 | 358 | { |
a3f61e7f | 359 | struct ltt_channel *chan = NULL; |
8020ceb5 MD |
360 | struct ltt_transport *transport; |
361 | ||
8020ceb5 MD |
362 | if (session->been_active) |
363 | goto active; /* Refuse to add channel to active session */ | |
364 | transport = ltt_transport_find(transport_name); | |
365 | if (!transport) { | |
b5234c06 | 366 | DBG("LTTng transport %s not found\n", |
8020ceb5 MD |
367 | transport_name); |
368 | goto notransport; | |
369 | } | |
d028eddb MD |
370 | chan_priv_init->id = session->free_chan_id++; |
371 | chan_priv_init->session = session; | |
8020ceb5 MD |
372 | /* |
373 | * Note: the channel creation op already writes into the packet | |
374 | * headers. Therefore the "chan" information used as input | |
375 | * should be already accessible. | |
376 | */ | |
a3f61e7f | 377 | chan = transport->ops.channel_create("[lttng]", buf_addr, |
8020ceb5 | 378 | subbuf_size, num_subbuf, switch_timer_interval, |
193183fb | 379 | read_timer_interval, shm_fd, wait_fd, |
d028eddb | 380 | memory_map_size, chan_priv_init); |
a3f61e7f | 381 | if (!chan) |
8020ceb5 | 382 | goto create_error; |
976fe9ea | 383 | chan->enabled = 1; |
8020ceb5 | 384 | chan->ops = &transport->ops; |
b5234c06 | 385 | cds_list_add(&chan->list, &session->chan); |
8020ceb5 MD |
386 | return chan; |
387 | ||
388 | create_error: | |
8020ceb5 MD |
389 | notransport: |
390 | active: | |
8020ceb5 MD |
391 | return NULL; |
392 | } | |
393 | ||
394 | /* | |
395 | * Only used internally at session destruction. | |
396 | */ | |
397 | static | |
398 | void _ltt_channel_destroy(struct ltt_channel *chan) | |
399 | { | |
b5234c06 | 400 | cds_list_del(&chan->list); |
8020ceb5 | 401 | lttng_destroy_context(chan->ctx); |
a3f61e7f | 402 | chan->ops->channel_destroy(chan); |
8020ceb5 MD |
403 | } |
404 | ||
e6c12e3d MD |
405 | int ltt_wildcard_create(struct ltt_channel *chan, |
406 | struct lttng_ust_event *event_param, | |
407 | struct session_wildcard **_sw) | |
408 | { | |
409 | struct session_wildcard *sw; | |
410 | ||
411 | sw = add_wildcard(event_param->name, chan, event_param); | |
412 | if (!sw || IS_ERR(sw)) { | |
413 | return PTR_ERR(sw); | |
414 | } | |
415 | *_sw = sw; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static | |
420 | void _ltt_wildcard_destroy(struct session_wildcard *sw) | |
421 | { | |
422 | _remove_wildcard(sw); | |
423 | } | |
424 | ||
8020ceb5 MD |
425 | /* |
426 | * Supports event creation while tracing session is active. | |
427 | */ | |
576599a0 MD |
428 | int ltt_event_create(struct ltt_channel *chan, |
429 | struct lttng_ust_event *event_param, | |
430 | void *filter, | |
431 | struct ltt_event **_event) | |
8020ceb5 MD |
432 | { |
433 | struct ltt_event *event; | |
576599a0 | 434 | int ret = 0; |
8020ceb5 | 435 | |
576599a0 MD |
436 | if (chan->used_event_id == -1UL) { |
437 | ret = -ENOMEM; | |
8020ceb5 | 438 | goto full; |
576599a0 | 439 | } |
8020ceb5 MD |
440 | /* |
441 | * This is O(n^2) (for each event, the loop is called at event | |
442 | * creation). Might require a hash if we have lots of events. | |
443 | */ | |
576599a0 | 444 | cds_list_for_each_entry(event, &chan->session->events, list) { |
ff412fb5 MD |
445 | if (event->desc && !strncmp(event->desc->name, |
446 | event_param->name, | |
447 | LTTNG_UST_SYM_NAME_LEN - 1)) { | |
576599a0 | 448 | ret = -EEXIST; |
8020ceb5 | 449 | goto exist; |
576599a0 MD |
450 | } |
451 | } | |
b5234c06 | 452 | event = zmalloc(sizeof(struct ltt_event)); |
576599a0 MD |
453 | if (!event) { |
454 | ret = -ENOMEM; | |
8020ceb5 | 455 | goto cache_error; |
576599a0 | 456 | } |
8020ceb5 MD |
457 | event->chan = chan; |
458 | event->filter = filter; | |
8165c8da MD |
459 | /* |
460 | * used_event_id counts the maximum number of event IDs that can | |
461 | * register if all probes register. | |
462 | */ | |
463 | chan->used_event_id++; | |
976fe9ea | 464 | event->enabled = 1; |
8020ceb5 MD |
465 | event->instrumentation = event_param->instrumentation; |
466 | /* Populate ltt_event structure before tracepoint registration. */ | |
b5234c06 | 467 | cmm_smp_wmb(); |
8020ceb5 | 468 | switch (event_param->instrumentation) { |
b5234c06 | 469 | case LTTNG_UST_TRACEPOINT: |
8020ceb5 | 470 | event->desc = ltt_event_get(event_param->name); |
51c5df09 | 471 | /* TODO: check if loglevel match */ |
8165c8da MD |
472 | if (event->desc) { |
473 | ret = __tracepoint_probe_register(event_param->name, | |
474 | event->desc->probe_callback, | |
475 | event); | |
476 | if (ret) | |
477 | goto register_error; | |
478 | event->id = chan->free_event_id++; | |
479 | } else { | |
480 | /* | |
481 | * If the probe is not present, event->desc stays NULL, | |
482 | * waiting for the probe to register, and the event->id | |
483 | * stays unallocated. | |
484 | */ | |
485 | ret = add_pending_probe(event, event_param->name); | |
486 | if (ret) | |
487 | goto add_pending_error; | |
488 | } | |
8020ceb5 | 489 | break; |
8020ceb5 MD |
490 | default: |
491 | WARN_ON_ONCE(1); | |
492 | } | |
8165c8da MD |
493 | if (event->desc) { |
494 | ret = _ltt_event_metadata_statedump(chan->session, chan, event); | |
495 | if (ret) | |
496 | goto statedump_error; | |
497 | } | |
b5234c06 | 498 | cds_list_add(&event->list, &chan->session->events); |
576599a0 MD |
499 | *_event = event; |
500 | return 0; | |
8020ceb5 MD |
501 | |
502 | statedump_error: | |
8165c8da MD |
503 | if (event->desc) { |
504 | WARN_ON_ONCE(__tracepoint_probe_unregister(event_param->name, | |
505 | event->desc->probe_callback, | |
506 | event)); | |
507 | ltt_event_put(event->desc); | |
508 | } | |
509 | add_pending_error: | |
8020ceb5 | 510 | register_error: |
b5234c06 | 511 | free(event); |
8020ceb5 MD |
512 | cache_error: |
513 | exist: | |
514 | full: | |
576599a0 | 515 | return ret; |
8020ceb5 MD |
516 | } |
517 | ||
518 | /* | |
519 | * Only used internally at session destruction. | |
520 | */ | |
521 | int _ltt_event_unregister(struct ltt_event *event) | |
522 | { | |
523 | int ret = -EINVAL; | |
524 | ||
525 | switch (event->instrumentation) { | |
b5234c06 | 526 | case LTTNG_UST_TRACEPOINT: |
8165c8da MD |
527 | if (event->desc) { |
528 | ret = __tracepoint_probe_unregister(event->desc->name, | |
529 | event->desc->probe_callback, | |
530 | event); | |
531 | if (ret) | |
532 | return ret; | |
533 | } else { | |
534 | remove_pending_probe(event->pending_probe); | |
535 | ret = 0; | |
536 | } | |
8020ceb5 | 537 | break; |
8020ceb5 MD |
538 | default: |
539 | WARN_ON_ONCE(1); | |
540 | } | |
541 | return ret; | |
542 | } | |
543 | ||
544 | /* | |
545 | * Only used internally at session destruction. | |
546 | */ | |
547 | static | |
548 | void _ltt_event_destroy(struct ltt_event *event) | |
549 | { | |
550 | switch (event->instrumentation) { | |
b5234c06 | 551 | case LTTNG_UST_TRACEPOINT: |
8165c8da MD |
552 | if (event->desc) { |
553 | ltt_event_put(event->desc); | |
554 | } | |
8020ceb5 | 555 | break; |
8020ceb5 MD |
556 | default: |
557 | WARN_ON_ONCE(1); | |
558 | } | |
b5234c06 | 559 | cds_list_del(&event->list); |
8020ceb5 | 560 | lttng_destroy_context(event->ctx); |
b5234c06 | 561 | free(event); |
8020ceb5 MD |
562 | } |
563 | ||
564 | /* | |
565 | * We have exclusive access to our metadata buffer (protected by the | |
17dfb34b | 566 | * ust_lock), so we can do racy operations such as looking for |
8020ceb5 MD |
567 | * remaining space left in packet and write, since mutual exclusion |
568 | * protects us from concurrent writes. | |
569 | */ | |
570 | int lttng_metadata_printf(struct ltt_session *session, | |
571 | const char *fmt, ...) | |
572 | { | |
4cfec15c | 573 | struct lttng_ust_lib_ring_buffer_ctx ctx; |
8020ceb5 | 574 | struct ltt_channel *chan = session->metadata; |
b5234c06 | 575 | char *str = NULL; |
8020ceb5 MD |
576 | int ret = 0, waitret; |
577 | size_t len, reserve_len, pos; | |
578 | va_list ap; | |
579 | ||
b5234c06 | 580 | WARN_ON_ONCE(!CMM_ACCESS_ONCE(session->active)); |
8020ceb5 MD |
581 | |
582 | va_start(ap, fmt); | |
b5234c06 | 583 | ret = vasprintf(&str, fmt, ap); |
8020ceb5 | 584 | va_end(ap); |
b5234c06 | 585 | if (ret < 0) |
8020ceb5 MD |
586 | return -ENOMEM; |
587 | ||
588 | len = strlen(str); | |
589 | pos = 0; | |
590 | ||
591 | for (pos = 0; pos < len; pos += reserve_len) { | |
592 | reserve_len = min_t(size_t, | |
1d498196 | 593 | chan->ops->packet_avail_size(chan->chan, chan->handle), |
8020ceb5 MD |
594 | len - pos); |
595 | lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len, | |
1d498196 | 596 | sizeof(char), -1, chan->handle); |
8020ceb5 MD |
597 | /* |
598 | * We don't care about metadata buffer's records lost | |
599 | * count, because we always retry here. Report error if | |
600 | * we need to bail out after timeout or being | |
601 | * interrupted. | |
602 | */ | |
b5234c06 | 603 | waitret = wait_cond_interruptible_timeout( |
8020ceb5 MD |
604 | ({ |
605 | ret = chan->ops->event_reserve(&ctx, 0); | |
606 | ret != -ENOBUFS || !ret; | |
607 | }), | |
b5234c06 | 608 | LTTNG_METADATA_TIMEOUT_MSEC); |
b472cfc0 | 609 | if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) { |
b5234c06 MD |
610 | DBG("LTTng: Failure to write metadata to buffers (%s)\n", |
611 | waitret == -EINTR ? "interrupted" : | |
8020ceb5 | 612 | (ret == -ENOBUFS ? "timeout" : "I/O error")); |
b5234c06 | 613 | if (waitret == -EINTR) |
8020ceb5 MD |
614 | ret = waitret; |
615 | goto end; | |
616 | } | |
617 | chan->ops->event_write(&ctx, &str[pos], reserve_len); | |
618 | chan->ops->event_commit(&ctx); | |
619 | } | |
620 | end: | |
b5234c06 | 621 | free(str); |
8020ceb5 MD |
622 | return ret; |
623 | } | |
624 | ||
625 | static | |
626 | int _ltt_field_statedump(struct ltt_session *session, | |
627 | const struct lttng_event_field *field) | |
628 | { | |
629 | int ret = 0; | |
630 | ||
631 | switch (field->type.atype) { | |
632 | case atype_integer: | |
633 | ret = lttng_metadata_printf(session, | |
4e2ee1f5 | 634 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", |
8020ceb5 MD |
635 | field->type.u.basic.integer.size, |
636 | field->type.u.basic.integer.alignment, | |
637 | field->type.u.basic.integer.signedness, | |
638 | (field->type.u.basic.integer.encoding == lttng_encode_none) | |
639 | ? "none" | |
640 | : (field->type.u.basic.integer.encoding == lttng_encode_UTF8) | |
641 | ? "UTF8" | |
642 | : "ASCII", | |
643 | field->type.u.basic.integer.base, | |
8a98a75d | 644 | #if (BYTE_ORDER == BIG_ENDIAN) |
403c40b4 MD |
645 | field->type.u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", |
646 | #else | |
647 | field->type.u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", | |
648 | #endif | |
649 | field->name); | |
650 | break; | |
651 | case atype_float: | |
652 | ret = lttng_metadata_printf(session, | |
8a98a75d | 653 | " floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", |
403c40b4 MD |
654 | field->type.u.basic._float.exp_dig, |
655 | field->type.u.basic._float.mant_dig, | |
656 | field->type.u.basic._float.alignment, | |
8a98a75d | 657 | #if (BYTE_ORDER == BIG_ENDIAN) |
8020ceb5 MD |
658 | field->type.u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", |
659 | #else | |
660 | field->type.u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", | |
661 | #endif | |
662 | field->name); | |
663 | break; | |
664 | case atype_enum: | |
665 | ret = lttng_metadata_printf(session, | |
666 | " %s %s;\n", | |
667 | field->type.u.basic.enumeration.name, | |
668 | field->name); | |
669 | break; | |
670 | case atype_array: | |
671 | { | |
672 | const struct lttng_basic_type *elem_type; | |
673 | ||
674 | elem_type = &field->type.u.array.elem_type; | |
675 | ret = lttng_metadata_printf(session, | |
4e2ee1f5 | 676 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
8020ceb5 MD |
677 | elem_type->u.basic.integer.size, |
678 | elem_type->u.basic.integer.alignment, | |
679 | elem_type->u.basic.integer.signedness, | |
680 | (elem_type->u.basic.integer.encoding == lttng_encode_none) | |
681 | ? "none" | |
682 | : (elem_type->u.basic.integer.encoding == lttng_encode_UTF8) | |
683 | ? "UTF8" | |
684 | : "ASCII", | |
685 | elem_type->u.basic.integer.base, | |
8a98a75d | 686 | #if (BYTE_ORDER == BIG_ENDIAN) |
8020ceb5 MD |
687 | elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", |
688 | #else | |
689 | elem_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", | |
690 | #endif | |
691 | field->name, field->type.u.array.length); | |
692 | break; | |
693 | } | |
694 | case atype_sequence: | |
695 | { | |
696 | const struct lttng_basic_type *elem_type; | |
697 | const struct lttng_basic_type *length_type; | |
698 | ||
699 | elem_type = &field->type.u.sequence.elem_type; | |
700 | length_type = &field->type.u.sequence.length_type; | |
701 | ret = lttng_metadata_printf(session, | |
702 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", | |
703 | length_type->u.basic.integer.size, | |
704 | (unsigned int) length_type->u.basic.integer.alignment, | |
705 | length_type->u.basic.integer.signedness, | |
706 | (length_type->u.basic.integer.encoding == lttng_encode_none) | |
707 | ? "none" | |
708 | : ((length_type->u.basic.integer.encoding == lttng_encode_UTF8) | |
709 | ? "UTF8" | |
710 | : "ASCII"), | |
711 | length_type->u.basic.integer.base, | |
8a98a75d | 712 | #if (BYTE_ORDER == BIG_ENDIAN) |
8020ceb5 MD |
713 | length_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", |
714 | #else | |
715 | length_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", | |
716 | #endif | |
717 | field->name); | |
718 | if (ret) | |
719 | return ret; | |
720 | ||
721 | ret = lttng_metadata_printf(session, | |
4e2ee1f5 | 722 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", |
8020ceb5 MD |
723 | elem_type->u.basic.integer.size, |
724 | (unsigned int) elem_type->u.basic.integer.alignment, | |
725 | elem_type->u.basic.integer.signedness, | |
726 | (elem_type->u.basic.integer.encoding == lttng_encode_none) | |
727 | ? "none" | |
728 | : ((elem_type->u.basic.integer.encoding == lttng_encode_UTF8) | |
729 | ? "UTF8" | |
730 | : "ASCII"), | |
731 | elem_type->u.basic.integer.base, | |
8a98a75d | 732 | #if (BYTE_ORDER == BIG_ENDIAN) |
8020ceb5 MD |
733 | elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "", |
734 | #else | |
735 | elem_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "", | |
736 | #endif | |
737 | field->name, | |
738 | field->name); | |
739 | break; | |
740 | } | |
741 | ||
742 | case atype_string: | |
743 | /* Default encoding is UTF8 */ | |
744 | ret = lttng_metadata_printf(session, | |
4e2ee1f5 | 745 | " string%s _%s;\n", |
8020ceb5 MD |
746 | field->type.u.basic.string.encoding == lttng_encode_ASCII ? |
747 | " { encoding = ASCII; }" : "", | |
748 | field->name); | |
749 | break; | |
750 | default: | |
751 | WARN_ON_ONCE(1); | |
752 | return -EINVAL; | |
753 | } | |
754 | return ret; | |
755 | } | |
756 | ||
757 | static | |
758 | int _ltt_context_metadata_statedump(struct ltt_session *session, | |
759 | struct lttng_ctx *ctx) | |
760 | { | |
761 | int ret = 0; | |
762 | int i; | |
763 | ||
764 | if (!ctx) | |
765 | return 0; | |
766 | for (i = 0; i < ctx->nr_fields; i++) { | |
767 | const struct lttng_ctx_field *field = &ctx->fields[i]; | |
768 | ||
769 | ret = _ltt_field_statedump(session, &field->event_field); | |
770 | if (ret) | |
771 | return ret; | |
772 | } | |
773 | return ret; | |
774 | } | |
775 | ||
776 | static | |
777 | int _ltt_fields_metadata_statedump(struct ltt_session *session, | |
778 | struct ltt_event *event) | |
779 | { | |
780 | const struct lttng_event_desc *desc = event->desc; | |
781 | int ret = 0; | |
782 | int i; | |
783 | ||
784 | for (i = 0; i < desc->nr_fields; i++) { | |
785 | const struct lttng_event_field *field = &desc->fields[i]; | |
786 | ||
787 | ret = _ltt_field_statedump(session, field); | |
788 | if (ret) | |
789 | return ret; | |
790 | } | |
791 | return ret; | |
792 | } | |
793 | ||
794 | static | |
795 | int _ltt_event_metadata_statedump(struct ltt_session *session, | |
796 | struct ltt_channel *chan, | |
797 | struct ltt_event *event) | |
798 | { | |
799 | int ret = 0; | |
800 | ||
b5234c06 | 801 | if (event->metadata_dumped || !CMM_ACCESS_ONCE(session->active)) |
8020ceb5 MD |
802 | return 0; |
803 | if (chan == session->metadata) | |
804 | return 0; | |
8165c8da MD |
805 | /* |
806 | * Don't print events for which probe load is pending. | |
807 | */ | |
808 | if (!event->desc) | |
809 | return 0; | |
8020ceb5 MD |
810 | |
811 | ret = lttng_metadata_printf(session, | |
812 | "event {\n" | |
7083f0fe | 813 | " name = \"%s\";\n" |
8020ceb5 MD |
814 | " id = %u;\n" |
815 | " stream_id = %u;\n", | |
816 | event->desc->name, | |
817 | event->id, | |
818 | event->chan->id); | |
819 | if (ret) | |
820 | goto end; | |
821 | ||
e6c12e3d | 822 | if (event->desc->loglevel) { |
882a56d7 | 823 | const int *ll_entry; |
e6c12e3d MD |
824 | |
825 | ll_entry = *event->desc->loglevel; | |
826 | ret = lttng_metadata_printf(session, | |
882a56d7 MD |
827 | " loglevel = %d;\n", |
828 | ll_entry); | |
e6c12e3d MD |
829 | if (ret) |
830 | goto end; | |
831 | } | |
832 | ||
8020ceb5 MD |
833 | if (event->ctx) { |
834 | ret = lttng_metadata_printf(session, | |
835 | " context := struct {\n"); | |
836 | if (ret) | |
837 | goto end; | |
838 | } | |
839 | ret = _ltt_context_metadata_statedump(session, event->ctx); | |
840 | if (ret) | |
841 | goto end; | |
842 | if (event->ctx) { | |
843 | ret = lttng_metadata_printf(session, | |
844 | " };\n"); | |
845 | if (ret) | |
846 | goto end; | |
847 | } | |
848 | ||
849 | ret = lttng_metadata_printf(session, | |
850 | " fields := struct {\n" | |
851 | ); | |
852 | if (ret) | |
853 | goto end; | |
854 | ||
855 | ret = _ltt_fields_metadata_statedump(session, event); | |
856 | if (ret) | |
857 | goto end; | |
858 | ||
859 | /* | |
860 | * LTTng space reservation can only reserve multiples of the | |
861 | * byte size. | |
862 | */ | |
863 | ret = lttng_metadata_printf(session, | |
864 | " };\n" | |
865 | "};\n\n"); | |
866 | if (ret) | |
867 | goto end; | |
868 | ||
869 | event->metadata_dumped = 1; | |
870 | end: | |
871 | return ret; | |
872 | ||
873 | } | |
874 | ||
875 | static | |
876 | int _ltt_channel_metadata_statedump(struct ltt_session *session, | |
877 | struct ltt_channel *chan) | |
878 | { | |
879 | int ret = 0; | |
880 | ||
b5234c06 | 881 | if (chan->metadata_dumped || !CMM_ACCESS_ONCE(session->active)) |
8020ceb5 MD |
882 | return 0; |
883 | if (chan == session->metadata) | |
884 | return 0; | |
885 | ||
886 | WARN_ON_ONCE(!chan->header_type); | |
887 | ret = lttng_metadata_printf(session, | |
888 | "stream {\n" | |
889 | " id = %u;\n" | |
890 | " event.header := %s;\n" | |
891 | " packet.context := struct packet_context;\n", | |
892 | chan->id, | |
893 | chan->header_type == 1 ? "struct event_header_compact" : | |
894 | "struct event_header_large"); | |
895 | if (ret) | |
896 | goto end; | |
897 | ||
898 | if (chan->ctx) { | |
899 | ret = lttng_metadata_printf(session, | |
900 | " event.context := struct {\n"); | |
901 | if (ret) | |
902 | goto end; | |
903 | } | |
904 | ret = _ltt_context_metadata_statedump(session, chan->ctx); | |
905 | if (ret) | |
906 | goto end; | |
907 | if (chan->ctx) { | |
908 | ret = lttng_metadata_printf(session, | |
909 | " };\n"); | |
910 | if (ret) | |
911 | goto end; | |
912 | } | |
913 | ||
914 | ret = lttng_metadata_printf(session, | |
915 | "};\n\n"); | |
916 | ||
917 | chan->metadata_dumped = 1; | |
918 | end: | |
919 | return ret; | |
920 | } | |
921 | ||
922 | static | |
923 | int _ltt_stream_packet_context_declare(struct ltt_session *session) | |
924 | { | |
925 | return lttng_metadata_printf(session, | |
926 | "struct packet_context {\n" | |
28b12049 MD |
927 | " uint64_clock_monotonic_t timestamp_begin;\n" |
928 | " uint64_clock_monotonic_t timestamp_end;\n" | |
8020ceb5 MD |
929 | " uint32_t events_discarded;\n" |
930 | " uint32_t content_size;\n" | |
931 | " uint32_t packet_size;\n" | |
932 | " uint32_t cpu_id;\n" | |
933 | "};\n\n" | |
934 | ); | |
935 | } | |
936 | ||
937 | /* | |
938 | * Compact header: | |
939 | * id: range: 0 - 30. | |
940 | * id 31 is reserved to indicate an extended header. | |
941 | * | |
942 | * Large header: | |
943 | * id: range: 0 - 65534. | |
944 | * id 65535 is reserved to indicate an extended header. | |
945 | */ | |
946 | static | |
947 | int _ltt_event_header_declare(struct ltt_session *session) | |
948 | { | |
949 | return lttng_metadata_printf(session, | |
950 | "struct event_header_compact {\n" | |
951 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" | |
952 | " variant <id> {\n" | |
953 | " struct {\n" | |
28b12049 | 954 | " uint27_clock_monotonic_t timestamp;\n" |
8020ceb5 MD |
955 | " } compact;\n" |
956 | " struct {\n" | |
957 | " uint32_t id;\n" | |
28b12049 | 958 | " uint64_clock_monotonic_t timestamp;\n" |
8020ceb5 MD |
959 | " } extended;\n" |
960 | " } v;\n" | |
961 | "} align(%u);\n" | |
962 | "\n" | |
963 | "struct event_header_large {\n" | |
964 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" | |
965 | " variant <id> {\n" | |
966 | " struct {\n" | |
28b12049 | 967 | " uint32_clock_monotonic_t timestamp;\n" |
8020ceb5 MD |
968 | " } compact;\n" |
969 | " struct {\n" | |
970 | " uint32_t id;\n" | |
28b12049 | 971 | " uint64_clock_monotonic_t timestamp;\n" |
8020ceb5 MD |
972 | " } extended;\n" |
973 | " } v;\n" | |
974 | "} align(%u);\n\n", | |
1dbfff0c MD |
975 | lttng_alignof(uint32_t) * CHAR_BIT, |
976 | lttng_alignof(uint16_t) * CHAR_BIT | |
8020ceb5 MD |
977 | ); |
978 | } | |
979 | ||
28b12049 MD |
980 | /* |
981 | * Approximation of NTP time of day to clock monotonic correlation, | |
982 | * taken at start of trace. | |
983 | * Yes, this is only an approximation. Yes, we can (and will) do better | |
984 | * in future versions. | |
985 | */ | |
986 | static | |
987 | uint64_t measure_clock_offset(void) | |
988 | { | |
989 | uint64_t offset, monotonic[2], realtime; | |
990 | struct timespec rts = { 0, 0 }; | |
991 | int ret; | |
992 | ||
993 | monotonic[0] = trace_clock_read64(); | |
994 | ret = clock_gettime(CLOCK_REALTIME, &rts); | |
995 | if (ret < 0) | |
996 | return 0; | |
997 | monotonic[1] = trace_clock_read64(); | |
998 | offset = (monotonic[0] + monotonic[1]) >> 1; | |
999 | realtime = rts.tv_sec * 1000000000ULL; | |
1000 | realtime += rts.tv_nsec; | |
1001 | offset = realtime - offset; | |
1002 | return offset; | |
1003 | } | |
1004 | ||
8020ceb5 MD |
1005 | /* |
1006 | * Output metadata into this session's metadata buffers. | |
1007 | */ | |
1008 | static | |
1009 | int _ltt_session_metadata_statedump(struct ltt_session *session) | |
1010 | { | |
b5234c06 | 1011 | unsigned char *uuid_c = session->uuid; |
939950af | 1012 | char uuid_s[37], clock_uuid_s[CLOCK_UUID_LEN]; |
8020ceb5 MD |
1013 | struct ltt_channel *chan; |
1014 | struct ltt_event *event; | |
1015 | int ret = 0; | |
1016 | ||
b5234c06 | 1017 | if (!CMM_ACCESS_ONCE(session->active)) |
8020ceb5 MD |
1018 | return 0; |
1019 | if (session->metadata_dumped) | |
1020 | goto skip_session; | |
1021 | if (!session->metadata) { | |
b5234c06 | 1022 | DBG("LTTng: attempt to start tracing, but metadata channel is not found. Operation abort.\n"); |
8020ceb5 MD |
1023 | return -EPERM; |
1024 | } | |
1025 | ||
1026 | snprintf(uuid_s, sizeof(uuid_s), | |
1027 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
1028 | uuid_c[0], uuid_c[1], uuid_c[2], uuid_c[3], | |
1029 | uuid_c[4], uuid_c[5], uuid_c[6], uuid_c[7], | |
1030 | uuid_c[8], uuid_c[9], uuid_c[10], uuid_c[11], | |
1031 | uuid_c[12], uuid_c[13], uuid_c[14], uuid_c[15]); | |
1032 | ||
1033 | ret = lttng_metadata_printf(session, | |
1034 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" | |
1035 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" | |
1036 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" | |
1037 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" | |
1038 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" | |
1039 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" | |
1040 | "\n" | |
1041 | "trace {\n" | |
1042 | " major = %u;\n" | |
1043 | " minor = %u;\n" | |
1044 | " uuid = \"%s\";\n" | |
1045 | " byte_order = %s;\n" | |
1046 | " packet.header := struct {\n" | |
1047 | " uint32_t magic;\n" | |
1048 | " uint8_t uuid[16];\n" | |
1049 | " uint32_t stream_id;\n" | |
1050 | " };\n" | |
1051 | "};\n\n", | |
1dbfff0c MD |
1052 | lttng_alignof(uint8_t) * CHAR_BIT, |
1053 | lttng_alignof(uint16_t) * CHAR_BIT, | |
1054 | lttng_alignof(uint32_t) * CHAR_BIT, | |
1055 | lttng_alignof(uint64_t) * CHAR_BIT, | |
8020ceb5 MD |
1056 | CTF_VERSION_MAJOR, |
1057 | CTF_VERSION_MINOR, | |
1058 | uuid_s, | |
8a98a75d | 1059 | #if (BYTE_ORDER == BIG_ENDIAN) |
8020ceb5 MD |
1060 | "be" |
1061 | #else | |
1062 | "le" | |
1063 | #endif | |
1064 | ); | |
1065 | if (ret) | |
1066 | goto end; | |
1067 | ||
28b12049 MD |
1068 | ret = lttng_metadata_printf(session, |
1069 | "clock {\n" | |
939950af MD |
1070 | " name = %s;\n", |
1071 | "monotonic" | |
1072 | ); | |
1073 | if (ret) | |
1074 | goto end; | |
1075 | ||
1076 | if (!trace_clock_uuid(clock_uuid_s)) { | |
1077 | ret = lttng_metadata_printf(session, | |
1078 | " uuid = \"%s\";\n", | |
1079 | clock_uuid_s | |
1080 | ); | |
1081 | if (ret) | |
1082 | goto end; | |
1083 | } | |
1084 | ||
1085 | ret = lttng_metadata_printf(session, | |
28b12049 MD |
1086 | " description = \"Monotonic Clock\";\n" |
1087 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" | |
1088 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" | |
1089 | " offset = %" PRIu64 ";\n" | |
1090 | "};\n\n", | |
28b12049 MD |
1091 | trace_clock_freq(), |
1092 | measure_clock_offset() | |
1093 | ); | |
1094 | if (ret) | |
1095 | goto end; | |
1096 | ||
1097 | ret = lttng_metadata_printf(session, | |
1098 | "typealias integer {\n" | |
1099 | " size = 27; align = 1; signed = false;\n" | |
1100 | " map = clock.monotonic.value;\n" | |
1101 | "} := uint27_clock_monotonic_t;\n" | |
1102 | "\n" | |
1103 | "typealias integer {\n" | |
1104 | " size = 32; align = %u; signed = false;\n" | |
1105 | " map = clock.monotonic.value;\n" | |
1106 | "} := uint32_clock_monotonic_t;\n" | |
1107 | "\n" | |
1108 | "typealias integer {\n" | |
1109 | " size = 64; align = %u; signed = false;\n" | |
1110 | " map = clock.monotonic.value;\n" | |
1111 | "} := uint64_clock_monotonic_t;\n\n", | |
1112 | lttng_alignof(uint32_t) * CHAR_BIT, | |
1113 | lttng_alignof(uint64_t) * CHAR_BIT | |
1114 | ); | |
1115 | if (ret) | |
1116 | goto end; | |
1117 | ||
8020ceb5 MD |
1118 | ret = _ltt_stream_packet_context_declare(session); |
1119 | if (ret) | |
1120 | goto end; | |
1121 | ||
1122 | ret = _ltt_event_header_declare(session); | |
1123 | if (ret) | |
1124 | goto end; | |
1125 | ||
1126 | skip_session: | |
b5234c06 | 1127 | cds_list_for_each_entry(chan, &session->chan, list) { |
8020ceb5 MD |
1128 | ret = _ltt_channel_metadata_statedump(session, chan); |
1129 | if (ret) | |
1130 | goto end; | |
1131 | } | |
1132 | ||
b5234c06 | 1133 | cds_list_for_each_entry(event, &session->events, list) { |
8020ceb5 MD |
1134 | ret = _ltt_event_metadata_statedump(session, event->chan, event); |
1135 | if (ret) | |
1136 | goto end; | |
1137 | } | |
1138 | session->metadata_dumped = 1; | |
1139 | end: | |
1140 | return ret; | |
1141 | } | |
1142 | ||
003fedf4 | 1143 | void lttng_ust_events_exit(void) |
8020ceb5 MD |
1144 | { |
1145 | struct ltt_session *session, *tmpsession; | |
1146 | ||
b5234c06 | 1147 | cds_list_for_each_entry_safe(session, tmpsession, &sessions, list) |
8020ceb5 | 1148 | ltt_session_destroy(session); |
8020ceb5 | 1149 | } |