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d7bfb9b0 JG |
1 | /* |
2 | * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
d7bfb9b0 | 8 | #include "ust-app.hpp" |
28ab034a | 9 | #include "ust-registry-channel.hpp" |
d7bfb9b0 JG |
10 | #include "ust-registry-event.hpp" |
11 | ||
12 | #include <common/error.hpp> | |
13 | #include <common/exception.hpp> | |
14 | #include <common/hashtable/utils.hpp> | |
15 | #include <common/make-unique-wrapper.hpp> | |
24ed18f2 | 16 | #include <common/make-unique.hpp> |
d7bfb9b0 JG |
17 | #include <common/urcu.hpp> |
18 | ||
cd9adb8b JG |
19 | #include <utility> |
20 | ||
d7bfb9b0 JG |
21 | namespace lst = lttng::sessiond::trace; |
22 | namespace lsu = lttng::sessiond::ust; | |
23 | ||
24 | namespace { | |
25 | bool is_max_event_id(uint32_t id) | |
26 | { | |
27 | return id == UINT32_MAX; | |
28 | } | |
29 | ||
30 | unsigned long ht_hash_event(const void *_key, unsigned long seed) | |
31 | { | |
32 | uint64_t hashed_key; | |
33 | const lttng::sessiond::ust::registry_event *key = | |
28ab034a | 34 | (lttng::sessiond::ust::registry_event *) _key; |
d7bfb9b0 JG |
35 | |
36 | LTTNG_ASSERT(key); | |
37 | ||
38 | hashed_key = (uint64_t) hash_key_str(key->name.c_str(), seed); | |
39 | ||
40 | return hash_key_u64(&hashed_key, seed); | |
41 | } | |
42 | ||
43 | /* | |
44 | * Hash table match function for event in the registry. | |
45 | */ | |
46 | int ht_match_event(struct cds_lfht_node *node, const void *_key) | |
47 | { | |
48 | const lttng::sessiond::ust::registry_event *key; | |
49 | lttng::sessiond::ust::registry_event *event; | |
50 | ||
51 | LTTNG_ASSERT(node); | |
52 | LTTNG_ASSERT(_key); | |
53 | ||
f139a4f9 | 54 | event = lttng::utils::container_of(node, <tng::sessiond::ust::registry_event::_node); |
d7bfb9b0 JG |
55 | key = (lttng::sessiond::ust::registry_event *) _key; |
56 | ||
57 | /* It has to be a perfect match. First, compare the event names. */ | |
58 | if (event->name != key->name) { | |
59 | goto no_match; | |
60 | } | |
61 | ||
62 | /* Compare log levels. */ | |
63 | if (event->log_level != key->log_level) { | |
64 | goto no_match; | |
65 | } | |
66 | ||
67 | /* Compare the arrays of fields. */ | |
68 | if (*event->payload != *key->payload) { | |
69 | goto no_match; | |
70 | } | |
71 | ||
72 | /* Compare model URI. */ | |
73 | if (event->model_emf_uri != key->model_emf_uri) { | |
74 | goto no_match; | |
75 | } | |
76 | ||
77 | /* Match */ | |
78 | return 1; | |
79 | ||
80 | no_match: | |
81 | return 0; | |
82 | } | |
24ed18f2 | 83 | |
28ab034a JG |
84 | lst::type::cuptr create_event_header(const lst::abi& trace_abi, |
85 | lst::stream_class::header_type header_type) | |
24ed18f2 JG |
86 | { |
87 | lst::structure_type::fields event_header_fields; | |
88 | ||
89 | if (header_type == lst::stream_class::header_type::COMPACT) { | |
90 | auto enum_mappings = std::make_shared<lst::unsigned_enumeration_type::mappings>(); | |
45110cdd | 91 | lst::unsigned_enumeration_type::mapping compact_mapping{ |
28ab034a JG |
92 | "compact", lst::unsigned_enumeration_type::mapping::range_t(0, 30) |
93 | }; | |
94 | lst::unsigned_enumeration_type::mapping extended_mapping{ "extended", 31 }; | |
24ed18f2 | 95 | |
45110cdd JG |
96 | enum_mappings->emplace_back(compact_mapping); |
97 | enum_mappings->emplace_back(extended_mapping); | |
24ed18f2 | 98 | |
28ab034a JG |
99 | lst::type::cuptr choice_enum = lttng::make_unique<lst::unsigned_enumeration_type>( |
100 | 1, | |
101 | trace_abi.byte_order, | |
102 | 5, | |
103 | lst::integer_type::base::DECIMAL, | |
104 | std::move(enum_mappings), | |
105 | std::initializer_list<lst::integer_type::role>( | |
106 | { lst::integer_type::role::EVENT_RECORD_CLASS_ID })); | |
24ed18f2 | 107 | |
28ab034a JG |
108 | lst::variant_type< |
109 | lst::unsigned_enumeration_type::mapping::range_t::range_integer_t>::choices | |
110 | variant_choices; | |
24ed18f2 JG |
111 | |
112 | lst::structure_type::fields compact_fields; | |
28ab034a JG |
113 | compact_fields.emplace_back(lttng::make_unique<lst::field>( |
114 | "timestamp", | |
115 | lttng::make_unique<lst::integer_type>( | |
116 | 1, | |
117 | trace_abi.byte_order, | |
118 | 27, | |
119 | lst::integer_type::signedness::UNSIGNED, | |
120 | lst::integer_type::base::DECIMAL, | |
121 | std::initializer_list<lst::integer_type::role>( | |
122 | { lst::integer_type::role::DEFAULT_CLOCK_TIMESTAMP })))); | |
123 | ||
124 | auto compact_type = | |
125 | lttng::make_unique<lst::structure_type>(0, std::move(compact_fields)); | |
45110cdd | 126 | variant_choices.emplace_back(std::move(compact_mapping), std::move(compact_type)); |
24ed18f2 JG |
127 | |
128 | lst::structure_type::fields extended_fields; | |
28ab034a JG |
129 | extended_fields.emplace_back(lttng::make_unique<lst::field>( |
130 | "id", | |
131 | lttng::make_unique<lst::integer_type>( | |
132 | trace_abi.uint32_t_alignment, | |
133 | trace_abi.byte_order, | |
134 | 32, | |
135 | lst::integer_type::signedness::UNSIGNED, | |
136 | lst::integer_type::base::DECIMAL, | |
137 | std::initializer_list<lst::integer_type::role>( | |
138 | { lst::integer_type::role::EVENT_RECORD_CLASS_ID })))); | |
139 | extended_fields.emplace_back(lttng::make_unique<lst::field>( | |
140 | "timestamp", | |
141 | lttng::make_unique<lst::integer_type>( | |
142 | trace_abi.uint64_t_alignment, | |
143 | trace_abi.byte_order, | |
144 | 64, | |
145 | lst::integer_type::signedness::UNSIGNED, | |
146 | lst::integer_type::base::DECIMAL, | |
147 | std::initializer_list<lst::integer_type::role>( | |
148 | { lst::integer_type::role::DEFAULT_CLOCK_TIMESTAMP })))); | |
149 | ||
150 | lst::type::cuptr extended_type = | |
151 | lttng::make_unique<lst::structure_type>(0, std::move(extended_fields)); | |
45110cdd | 152 | variant_choices.emplace_back(std::move(extended_mapping), std::move(extended_type)); |
24ed18f2 | 153 | |
45110cdd | 154 | auto variant = lttng::make_unique<lst::variant_type< |
28ab034a JG |
155 | lst::unsigned_enumeration_type::mapping::range_t::range_integer_t>>( |
156 | 0, | |
157 | lst::field_location(lst::field_location::root::EVENT_RECORD_HEADER, | |
158 | { "id" }), | |
159 | std::move(variant_choices)); | |
24ed18f2 | 160 | |
24ed18f2 | 161 | event_header_fields.emplace_back( |
28ab034a JG |
162 | lttng::make_unique<lst::field>("id", std::move(choice_enum))); |
163 | event_header_fields.emplace_back( | |
164 | lttng::make_unique<lst::field>("v", std::move(variant))); | |
24ed18f2 JG |
165 | } else { |
166 | auto enum_mappings = std::make_shared<lst::unsigned_enumeration_type::mappings>(); | |
28ab034a JG |
167 | lst::unsigned_enumeration_type::mapping compact_mapping{ |
168 | "compact", lst::unsigned_enumeration_type::mapping::range_t(0, 65534) | |
169 | }; | |
170 | lst::unsigned_enumeration_type::mapping extended_mapping{ "extended", 65535 }; | |
45110cdd JG |
171 | enum_mappings->emplace_back(compact_mapping); |
172 | enum_mappings->emplace_back(extended_mapping); | |
24ed18f2 | 173 | |
45110cdd | 174 | auto choice_enum = lttng::make_unique<lst::unsigned_enumeration_type>( |
28ab034a JG |
175 | trace_abi.uint16_t_alignment, |
176 | trace_abi.byte_order, | |
177 | 16, | |
178 | lst::integer_type::base::DECIMAL, | |
179 | std::move(enum_mappings), | |
180 | std::initializer_list<lst::integer_type::role>( | |
181 | { lst::integer_type::role::EVENT_RECORD_CLASS_ID })); | |
182 | ||
183 | lst::variant_type< | |
184 | lst::unsigned_enumeration_type::mapping::range_t::range_integer_t>::choices | |
185 | variant_choices; | |
24ed18f2 JG |
186 | |
187 | lst::structure_type::fields compact_fields; | |
28ab034a JG |
188 | compact_fields.emplace_back(lttng::make_unique<lst::field>( |
189 | "timestamp", | |
190 | lttng::make_unique<lst::integer_type>( | |
191 | trace_abi.uint32_t_alignment, | |
192 | trace_abi.byte_order, | |
193 | 32, | |
194 | lst::integer_type::signedness::UNSIGNED, | |
195 | lst::integer_type::base::DECIMAL, | |
196 | std::initializer_list<lst::integer_type::role>( | |
197 | { lst::integer_type::role::DEFAULT_CLOCK_TIMESTAMP })))); | |
198 | ||
199 | lst::type::cuptr compact_type = | |
200 | lttng::make_unique<lst::structure_type>(0, std::move(compact_fields)); | |
45110cdd | 201 | variant_choices.emplace_back(std::move(compact_mapping), std::move(compact_type)); |
24ed18f2 JG |
202 | |
203 | lst::structure_type::fields extended_fields; | |
28ab034a JG |
204 | extended_fields.emplace_back(lttng::make_unique<lst::field>( |
205 | "id", | |
206 | lttng::make_unique<lst::integer_type>( | |
207 | trace_abi.uint32_t_alignment, | |
208 | trace_abi.byte_order, | |
209 | 32, | |
210 | lst::integer_type::signedness::UNSIGNED, | |
211 | lst::integer_type::base::DECIMAL, | |
212 | std::initializer_list<lst::integer_type::role>( | |
213 | { lst::integer_type::role::EVENT_RECORD_CLASS_ID })))); | |
214 | extended_fields.emplace_back(lttng::make_unique<lst::field>( | |
215 | "timestamp", | |
216 | lttng::make_unique<lst::integer_type>( | |
217 | trace_abi.uint64_t_alignment, | |
218 | trace_abi.byte_order, | |
219 | 64, | |
220 | lst::integer_type::signedness::UNSIGNED, | |
221 | lst::integer_type::base::DECIMAL, | |
222 | std::initializer_list<lst::integer_type::role>( | |
223 | { lst::integer_type::role::DEFAULT_CLOCK_TIMESTAMP })))); | |
224 | ||
225 | auto extended_type = | |
226 | lttng::make_unique<lst::structure_type>(0, std::move(extended_fields)); | |
45110cdd | 227 | variant_choices.emplace_back(std::move(extended_mapping), std::move(extended_type)); |
24ed18f2 | 228 | |
45110cdd | 229 | auto variant = lttng::make_unique<lst::variant_type< |
28ab034a JG |
230 | lst::unsigned_enumeration_type::mapping::range_t::range_integer_t>>( |
231 | 0, | |
232 | lst::field_location(lst::field_location::root::EVENT_RECORD_HEADER, | |
233 | { "id" }), | |
234 | std::move(variant_choices)); | |
24ed18f2 | 235 | |
45110cdd | 236 | event_header_fields.emplace_back( |
28ab034a | 237 | lttng::make_unique<lst::field>("id", std::move(choice_enum))); |
24ed18f2 | 238 | event_header_fields.emplace_back( |
28ab034a | 239 | lttng::make_unique<lst::field>("v", std::move(variant))); |
24ed18f2 JG |
240 | } |
241 | ||
242 | return lttng::make_unique<lst::structure_type>(0, std::move(event_header_fields)); | |
243 | } | |
244 | ||
245 | lst::type::cuptr create_packet_context(const lst::abi& trace_abi) | |
246 | { | |
247 | lst::structure_type::fields packet_context_fields; | |
248 | ||
249 | /* uint64_t timestamp_begin */ | |
28ab034a JG |
250 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
251 | "timestamp_begin", | |
252 | lttng::make_unique<lst::integer_type>( | |
253 | trace_abi.uint64_t_alignment, | |
254 | trace_abi.byte_order, | |
255 | 64, | |
256 | lst::integer_type::signedness::UNSIGNED, | |
257 | lst::integer_type::base::DECIMAL, | |
258 | std::initializer_list<lst::integer_type::role>( | |
259 | { lst::integer_type::role::DEFAULT_CLOCK_TIMESTAMP })))); | |
24ed18f2 JG |
260 | |
261 | /* uint64_t timestamp_end */ | |
28ab034a JG |
262 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
263 | "timestamp_end", | |
264 | lttng::make_unique<lst::integer_type>( | |
265 | trace_abi.uint64_t_alignment, | |
266 | trace_abi.byte_order, | |
267 | 64, | |
268 | lst::integer_type::signedness::UNSIGNED, | |
269 | lst::integer_type::base::DECIMAL, | |
270 | std::initializer_list<lst::integer_type::role>( | |
271 | { lst::integer_type::role::PACKET_END_DEFAULT_CLOCK_TIMESTAMP })))); | |
24ed18f2 JG |
272 | |
273 | /* uint64_t content_size */ | |
28ab034a JG |
274 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
275 | "content_size", | |
276 | lttng::make_unique<lst::integer_type>( | |
277 | trace_abi.uint64_t_alignment, | |
278 | trace_abi.byte_order, | |
279 | 64, | |
280 | lst::integer_type::signedness::UNSIGNED, | |
281 | lst::integer_type::base::DECIMAL, | |
282 | std::initializer_list<lst::integer_type::role>( | |
283 | { lst::integer_type::role::PACKET_CONTENT_LENGTH })))); | |
24ed18f2 JG |
284 | |
285 | /* uint64_t packet_size */ | |
28ab034a JG |
286 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
287 | "packet_size", | |
288 | lttng::make_unique<lst::integer_type>( | |
289 | trace_abi.uint64_t_alignment, | |
290 | trace_abi.byte_order, | |
291 | 64, | |
292 | lst::integer_type::signedness::UNSIGNED, | |
293 | lst::integer_type::base::DECIMAL, | |
294 | std::initializer_list<lst::integer_type::role>( | |
295 | { lst::integer_type::role::PACKET_TOTAL_LENGTH })))); | |
24ed18f2 JG |
296 | |
297 | /* uint64_t packet_seq_num */ | |
28ab034a JG |
298 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
299 | "packet_seq_num", | |
300 | lttng::make_unique<lst::integer_type>( | |
301 | trace_abi.uint64_t_alignment, | |
302 | trace_abi.byte_order, | |
303 | 64, | |
304 | lst::integer_type::signedness::UNSIGNED, | |
305 | lst::integer_type::base::DECIMAL, | |
306 | std::initializer_list<lst::integer_type::role>( | |
307 | { lst::integer_type::role::PACKET_SEQUENCE_NUMBER })))); | |
24ed18f2 JG |
308 | |
309 | /* unsigned long events_discarded */ | |
28ab034a JG |
310 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
311 | "events_discarded", | |
312 | lttng::make_unique<lst::integer_type>( | |
313 | trace_abi.long_alignment, | |
314 | trace_abi.byte_order, | |
315 | trace_abi.bits_per_long, | |
316 | lst::integer_type::signedness::UNSIGNED, | |
317 | lst::integer_type::base::DECIMAL, | |
318 | std::initializer_list<lst::integer_type::role>( | |
319 | { lst::integer_type::role:: | |
320 | DISCARDED_EVENT_RECORD_COUNTER_SNAPSHOT })))); | |
24ed18f2 JG |
321 | |
322 | /* uint32_t cpu_id */ | |
28ab034a JG |
323 | packet_context_fields.emplace_back(lttng::make_unique<lst::field>( |
324 | "cpu_id", | |
325 | lttng::make_unique<lst::integer_type>(trace_abi.uint32_t_alignment, | |
326 | trace_abi.byte_order, | |
327 | 32, | |
328 | lst::integer_type::signedness::UNSIGNED, | |
329 | lst::integer_type::base::DECIMAL))); | |
24ed18f2 JG |
330 | |
331 | return lttng::make_unique<lst::structure_type>(0, std::move(packet_context_fields)); | |
332 | } | |
d7bfb9b0 JG |
333 | }; /* namespace */ |
334 | ||
28ab034a JG |
335 | lsu::registry_channel::registry_channel( |
336 | unsigned int channel_id, | |
337 | const lst::abi& trace_abi, | |
338 | std::string in_default_clock_class_name, | |
339 | lsu::registry_channel::registered_listener_fn channel_registered_listener, | |
340 | lsu::registry_channel::event_added_listener_fn event_added_listener) : | |
24ed18f2 | 341 | lst::stream_class(channel_id, |
28ab034a JG |
342 | lst::stream_class::header_type::LARGE, |
343 | std::move(in_default_clock_class_name)), | |
344 | _key{ -1ULL }, | |
345 | _consumer_key{ -1ULL }, | |
346 | _next_event_id{ 0 }, | |
cd9adb8b JG |
347 | _is_registered_listener{ std::move(channel_registered_listener) }, |
348 | _event_added_listener{ std::move(event_added_listener) }, | |
28ab034a | 349 | _is_registered{ false } |
d7bfb9b0 JG |
350 | { |
351 | _events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); | |
352 | if (!_events) { | |
353 | LTTNG_THROW_POSIX("Failed to allocate urcu events hash table", ENOMEM); | |
354 | } | |
355 | ||
356 | /* Set custom match function. */ | |
357 | _events->match_fct = ht_match_event; | |
358 | _events->hash_fct = ht_hash_event; | |
36038679 JG |
359 | |
360 | _rcu_head = {}; | |
361 | /* | |
362 | * Node's key is initialized by the channel's parent session. Its value is irrelevant to the | |
363 | * channel object itself. | |
364 | */ | |
365 | _node = {}; | |
24ed18f2 JG |
366 | |
367 | _packet_context = create_packet_context(trace_abi); | |
368 | _event_header = create_event_header(trace_abi, header_type_); | |
d7bfb9b0 JG |
369 | } |
370 | ||
28ab034a JG |
371 | void lsu::registry_channel::add_event(int session_objd, |
372 | int channel_objd, | |
373 | std::string name, | |
374 | std::string signature, | |
375 | std::vector<lst::field::cuptr> event_fields, | |
376 | int loglevel_value, | |
377 | nonstd::optional<std::string> model_emf_uri, | |
378 | lttng_buffer_type buffer_type, | |
379 | const ust_app& app, | |
380 | uint32_t& out_event_id) | |
d7bfb9b0 JG |
381 | { |
382 | uint32_t event_id; | |
383 | struct cds_lfht_node *nptr; | |
384 | lttng::urcu::read_lock_guard read_lock_guard; | |
385 | ||
386 | /* | |
387 | * This should not happen but since it comes from the UST tracer, an | |
388 | * external party, don't assert and simply validate values. | |
389 | */ | |
390 | if (session_objd < 0) { | |
391 | LTTNG_THROW_INVALID_ARGUMENT_ERROR(fmt::format( | |
28ab034a JG |
392 | "Invalid session object descriptor provided by application: session descriptor = {}, app = {}", |
393 | session_objd, | |
394 | app)); | |
d7bfb9b0 JG |
395 | } |
396 | ||
397 | if (channel_objd < 0) { | |
398 | LTTNG_THROW_INVALID_ARGUMENT_ERROR(fmt::format( | |
28ab034a JG |
399 | "Invalid channel object descriptor provided by application: channel descriptor = {}, app = {}", |
400 | channel_objd, | |
401 | app)); | |
d7bfb9b0 JG |
402 | } |
403 | ||
404 | /* Check if we've reached the maximum possible id. */ | |
405 | if (is_max_event_id(_next_event_id)) { | |
406 | LTTNG_THROW_ERROR(fmt::format( | |
28ab034a | 407 | "Failed to allocate new event id (id would overflow): app = {}", app)); |
d7bfb9b0 JG |
408 | } |
409 | ||
410 | auto event = lttng::make_unique_wrapper<lsu::registry_event, registry_event_destroy>( | |
28ab034a JG |
411 | new lsu::registry_event(_next_event_id, |
412 | id, | |
413 | session_objd, | |
414 | channel_objd, | |
415 | std::move(name), | |
416 | std::move(signature), | |
417 | std::move(event_fields), | |
418 | loglevel_value, | |
d7bfb9b0 JG |
419 | std::move(model_emf_uri))); |
420 | ||
421 | DBG3("%s", fmt::format("UST registry creating event: event = {}", *event).c_str()); | |
422 | ||
423 | /* | |
424 | * This is an add unique with a custom match function for event. The node | |
425 | * are matched using the event name and signature. | |
426 | */ | |
28ab034a JG |
427 | nptr = cds_lfht_add_unique(_events->ht, |
428 | _events->hash_fct(event.get(), lttng_ht_seed), | |
429 | _events->match_fct, | |
430 | event.get(), | |
431 | &event->_node); | |
f139a4f9 | 432 | if (nptr != &event->_node) { |
d7bfb9b0 JG |
433 | if (buffer_type == LTTNG_BUFFER_PER_UID) { |
434 | /* | |
435 | * This is normal, we just have to send the event id of the | |
436 | * returned node. | |
437 | */ | |
f139a4f9 | 438 | const auto existing_event = lttng::utils::container_of( |
28ab034a | 439 | nptr, <tng::sessiond::ust::registry_event::_node); |
d7bfb9b0 JG |
440 | event_id = existing_event->id; |
441 | } else { | |
442 | LTTNG_THROW_INVALID_ARGUMENT_ERROR(fmt::format( | |
28ab034a JG |
443 | "UST registry create event add unique failed for event: event = {}", |
444 | *event)); | |
d7bfb9b0 JG |
445 | } |
446 | } else { | |
447 | const auto& event_ref = *event; | |
448 | ||
449 | /* Ownership transferred to _events hash table. */ | |
5c7248cd | 450 | (void) event.release(); |
d7bfb9b0 JG |
451 | |
452 | /* Request next event id if the node was successfully added. */ | |
453 | event_id = event_ref.id; | |
454 | ||
455 | /* | |
456 | * Only increment the next id here since we don't want to waste an ID when the event | |
457 | * matches an existing one. | |
458 | */ | |
459 | _next_event_id++; | |
460 | _event_added_listener(*this, event_ref); | |
461 | } | |
462 | ||
463 | out_event_id = event_id; | |
464 | } | |
465 | ||
466 | lsu::registry_channel::~registry_channel() | |
467 | { | |
468 | lttng_ht_destroy(_events); | |
469 | } | |
470 | ||
28ab034a | 471 | const lttng::sessiond::trace::type *lsu::registry_channel::event_context() const |
d7bfb9b0 JG |
472 | { |
473 | LTTNG_ASSERT(_is_registered); | |
4bcf2294 | 474 | return lst::stream_class::event_context(); |
d7bfb9b0 JG |
475 | } |
476 | ||
4bcf2294 | 477 | void lsu::registry_channel::event_context(lttng::sessiond::trace::type::cuptr context) |
d7bfb9b0 JG |
478 | { |
479 | /* Must only be set once, on the first channel registration provided by an application. */ | |
24ed18f2 JG |
480 | LTTNG_ASSERT(!_event_context); |
481 | _event_context = std::move(context); | |
d7bfb9b0 JG |
482 | } |
483 | ||
484 | bool lsu::registry_channel::is_registered() const | |
485 | { | |
486 | return _is_registered; | |
487 | } | |
488 | ||
489 | void lsu::registry_channel::set_as_registered() | |
490 | { | |
491 | if (!_is_registered) { | |
492 | _is_registered = true; | |
493 | _is_registered_listener(*this); | |
494 | } | |
495 | } | |
496 | ||
497 | void lsu::registry_channel::_accept_on_event_classes( | |
28ab034a | 498 | lttng::sessiond::trace::trace_class_visitor& visitor) const |
d7bfb9b0 JG |
499 | { |
500 | std::vector<const lttng::sessiond::ust::registry_event *> sorted_event_classes; | |
501 | ||
502 | { | |
503 | lttng::urcu::read_lock_guard read_lock_guard; | |
504 | struct lttng_ht_iter iter; | |
505 | const lttng::sessiond::ust::registry_event *event; | |
506 | ||
507 | DIAGNOSTIC_PUSH | |
508 | DIAGNOSTIC_IGNORE_INVALID_OFFSETOF | |
28ab034a | 509 | cds_lfht_for_each_entry (_events->ht, &iter.iter, event, _node) { |
d7bfb9b0 JG |
510 | sorted_event_classes.emplace_back(event); |
511 | } | |
512 | DIAGNOSTIC_POP | |
513 | } | |
514 | ||
28ab034a JG |
515 | std::sort(sorted_event_classes.begin(), |
516 | sorted_event_classes.end(), | |
517 | [](const lttng::sessiond::ust::registry_event *a, | |
518 | const lttng::sessiond::ust::registry_event *b) { return a->id < b->id; }); | |
d7bfb9b0 JG |
519 | |
520 | for (const auto event : sorted_event_classes) { | |
521 | event->accept(visitor); | |
522 | } | |
523 | } |