Commit | Line | Data |
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d0b96690 DG |
1 | /* |
2 | * ust-metadata.c | |
3 | * | |
4 | * LTTng-UST metadata generation | |
5 | * | |
6 | * Copyright (C) 2010-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License, version 2 only, | |
10 | * as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
20 | */ | |
21 | ||
22 | #define _GNU_SOURCE | |
23 | #include <stdint.h> | |
24 | #include <string.h> | |
25 | #include <stdarg.h> | |
26 | #include <stdio.h> | |
27 | #include <limits.h> | |
28 | #include <unistd.h> | |
29 | #include <inttypes.h> | |
30 | #include <common/common.h> | |
31 | ||
32 | #include "ust-registry.h" | |
33 | #include "ust-clock.h" | |
34 | #include "ust-app.h" | |
35 | ||
36 | #ifndef max_t | |
37 | #define max_t(type, a, b) ((type) ((a) > (b) ? (a) : (b))) | |
38 | #endif | |
39 | ||
40 | static inline | |
41 | int fls(unsigned int x) | |
42 | { | |
43 | int r = 32; | |
44 | ||
45 | if (!x) | |
46 | return 0; | |
47 | if (!(x & 0xFFFF0000U)) { | |
48 | x <<= 16; | |
49 | r -= 16; | |
50 | } | |
51 | if (!(x & 0xFF000000U)) { | |
52 | x <<= 8; | |
53 | r -= 8; | |
54 | } | |
55 | if (!(x & 0xF0000000U)) { | |
56 | x <<= 4; | |
57 | r -= 4; | |
58 | } | |
59 | if (!(x & 0xC0000000U)) { | |
60 | x <<= 2; | |
61 | r -= 2; | |
62 | } | |
63 | if (!(x & 0x80000000U)) { | |
64 | x <<= 1; | |
65 | r -= 1; | |
66 | } | |
67 | return r; | |
68 | } | |
69 | ||
70 | static inline | |
71 | int get_count_order(unsigned int count) | |
72 | { | |
73 | int order; | |
74 | ||
75 | order = fls(count) - 1; | |
76 | if (count & (count - 1)) | |
77 | order++; | |
78 | return order; | |
79 | } | |
80 | ||
81 | /* | |
82 | * Returns offset where to write in metadata array, or negative error value on error. | |
83 | */ | |
84 | static | |
85 | ssize_t metadata_reserve(struct ust_registry_session *session, size_t len) | |
86 | { | |
87 | size_t new_len = session->metadata_len + len; | |
88 | size_t new_alloc_len = new_len; | |
89 | size_t old_alloc_len = session->metadata_alloc_len; | |
90 | ssize_t ret; | |
91 | ||
92 | if (new_alloc_len > (UINT32_MAX >> 1)) | |
93 | return -EINVAL; | |
94 | if ((old_alloc_len << 1) > (UINT32_MAX >> 1)) | |
95 | return -EINVAL; | |
96 | ||
97 | if (new_alloc_len > old_alloc_len) { | |
98 | char *newptr; | |
99 | ||
100 | new_alloc_len = | |
101 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
102 | newptr = realloc(session->metadata, new_alloc_len); | |
103 | if (!newptr) | |
104 | return -ENOMEM; | |
105 | session->metadata = newptr; | |
106 | /* We zero directly the memory from start of allocation. */ | |
107 | memset(&session->metadata[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
108 | session->metadata_alloc_len = new_alloc_len; | |
109 | } | |
110 | ret = session->metadata_len; | |
111 | session->metadata_len += len; | |
112 | return ret; | |
113 | } | |
114 | ||
115 | /* | |
116 | * We have exclusive access to our metadata buffer (protected by the | |
117 | * ust_lock), so we can do racy operations such as looking for | |
118 | * remaining space left in packet and write, since mutual exclusion | |
119 | * protects us from concurrent writes. | |
120 | */ | |
121 | static | |
122 | int lttng_metadata_printf(struct ust_registry_session *session, | |
123 | const char *fmt, ...) | |
124 | { | |
125 | char *str = NULL; | |
126 | size_t len; | |
127 | va_list ap; | |
128 | ssize_t offset; | |
129 | int ret; | |
130 | ||
131 | va_start(ap, fmt); | |
132 | ret = vasprintf(&str, fmt, ap); | |
133 | va_end(ap); | |
134 | if (ret < 0) | |
135 | return -ENOMEM; | |
136 | ||
137 | len = strlen(str); | |
138 | offset = metadata_reserve(session, len); | |
139 | if (offset < 0) { | |
140 | ret = offset; | |
141 | goto end; | |
142 | } | |
143 | memcpy(&session->metadata[offset], str, len); | |
144 | DBG3("Append to metadata: \"%s\"", str); | |
145 | ret = 0; | |
146 | ||
147 | end: | |
148 | free(str); | |
149 | return ret; | |
150 | } | |
151 | ||
152 | static | |
153 | int _lttng_field_statedump(struct ust_registry_session *session, | |
154 | const struct ustctl_field *field) | |
155 | { | |
156 | int ret = 0; | |
157 | const char *bo_be = " byte_order = be;"; | |
158 | const char *bo_le = " byte_order = le;"; | |
159 | const char *bo_native = ""; | |
160 | const char *bo_reverse; | |
161 | ||
162 | if (session->byte_order == BIG_ENDIAN) | |
163 | bo_reverse = bo_le; | |
164 | else | |
165 | bo_reverse = bo_be; | |
166 | ||
167 | switch (field->type.atype) { | |
168 | case ustctl_atype_integer: | |
169 | ret = lttng_metadata_printf(session, | |
170 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", | |
171 | field->type.u.basic.integer.size, | |
172 | field->type.u.basic.integer.alignment, | |
173 | field->type.u.basic.integer.signedness, | |
174 | (field->type.u.basic.integer.encoding == ustctl_encode_none) | |
175 | ? "none" | |
176 | : (field->type.u.basic.integer.encoding == ustctl_encode_UTF8) | |
177 | ? "UTF8" | |
178 | : "ASCII", | |
179 | field->type.u.basic.integer.base, | |
180 | field->type.u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
181 | field->name); | |
182 | break; | |
183 | case ustctl_atype_float: | |
184 | ret = lttng_metadata_printf(session, | |
185 | " floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", | |
186 | field->type.u.basic._float.exp_dig, | |
187 | field->type.u.basic._float.mant_dig, | |
188 | field->type.u.basic._float.alignment, | |
189 | field->type.u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
190 | field->name); | |
191 | break; | |
192 | case ustctl_atype_enum: | |
193 | return -EINVAL; | |
194 | case ustctl_atype_array: | |
195 | { | |
196 | const struct ustctl_basic_type *elem_type; | |
197 | ||
198 | elem_type = &field->type.u.array.elem_type; | |
199 | ret = lttng_metadata_printf(session, | |
200 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", | |
201 | elem_type->u.basic.integer.size, | |
202 | elem_type->u.basic.integer.alignment, | |
203 | elem_type->u.basic.integer.signedness, | |
204 | (elem_type->u.basic.integer.encoding == ustctl_encode_none) | |
205 | ? "none" | |
206 | : (elem_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
207 | ? "UTF8" | |
208 | : "ASCII", | |
209 | elem_type->u.basic.integer.base, | |
210 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
211 | field->name, field->type.u.array.length); | |
212 | break; | |
213 | } | |
214 | case ustctl_atype_sequence: | |
215 | { | |
216 | const struct ustctl_basic_type *elem_type; | |
217 | const struct ustctl_basic_type *length_type; | |
218 | ||
219 | elem_type = &field->type.u.sequence.elem_type; | |
220 | length_type = &field->type.u.sequence.length_type; | |
221 | ret = lttng_metadata_printf(session, | |
222 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", | |
223 | length_type->u.basic.integer.size, | |
224 | (unsigned int) length_type->u.basic.integer.alignment, | |
225 | length_type->u.basic.integer.signedness, | |
226 | (length_type->u.basic.integer.encoding == ustctl_encode_none) | |
227 | ? "none" | |
228 | : ((length_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
229 | ? "UTF8" | |
230 | : "ASCII"), | |
231 | length_type->u.basic.integer.base, | |
232 | length_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
233 | field->name); | |
234 | if (ret) | |
235 | return ret; | |
236 | ||
237 | ret = lttng_metadata_printf(session, | |
238 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", | |
239 | elem_type->u.basic.integer.size, | |
240 | (unsigned int) elem_type->u.basic.integer.alignment, | |
241 | elem_type->u.basic.integer.signedness, | |
242 | (elem_type->u.basic.integer.encoding == ustctl_encode_none) | |
243 | ? "none" | |
244 | : ((elem_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
245 | ? "UTF8" | |
246 | : "ASCII"), | |
247 | elem_type->u.basic.integer.base, | |
248 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
249 | field->name, | |
250 | field->name); | |
251 | break; | |
252 | } | |
253 | ||
254 | case ustctl_atype_string: | |
255 | /* Default encoding is UTF8 */ | |
256 | ret = lttng_metadata_printf(session, | |
257 | " string%s _%s;\n", | |
258 | field->type.u.basic.string.encoding == ustctl_encode_ASCII ? | |
259 | " { encoding = ASCII; }" : "", | |
260 | field->name); | |
261 | break; | |
262 | default: | |
263 | return -EINVAL; | |
264 | } | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static | |
269 | int _lttng_context_metadata_statedump(struct ust_registry_session *session, | |
270 | size_t nr_ctx_fields, | |
271 | struct ustctl_field *ctx) | |
272 | { | |
273 | int ret = 0; | |
274 | int i; | |
275 | ||
276 | if (!ctx) | |
277 | return 0; | |
278 | for (i = 0; i < nr_ctx_fields; i++) { | |
279 | const struct ustctl_field *field = &ctx[i]; | |
280 | ||
281 | ret = _lttng_field_statedump(session, field); | |
282 | if (ret) | |
283 | return ret; | |
284 | } | |
285 | return ret; | |
286 | } | |
287 | ||
288 | static | |
289 | int _lttng_fields_metadata_statedump(struct ust_registry_session *session, | |
290 | struct ust_registry_event *event) | |
291 | { | |
292 | int ret = 0; | |
293 | int i; | |
294 | ||
295 | for (i = 0; i < event->nr_fields; i++) { | |
296 | const struct ustctl_field *field = &event->fields[i]; | |
297 | ||
298 | ret = _lttng_field_statedump(session, field); | |
299 | if (ret) | |
300 | return ret; | |
301 | } | |
302 | return ret; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Should be called with session registry mutex held. | |
307 | */ | |
308 | int ust_metadata_event_statedump(struct ust_registry_session *session, | |
309 | struct ust_registry_channel *chan, | |
310 | struct ust_registry_event *event) | |
311 | { | |
312 | int ret = 0; | |
313 | ||
314 | /* Don't dump metadata events */ | |
315 | if (chan->chan_id == -1U) | |
316 | return 0; | |
317 | ||
318 | ret = lttng_metadata_printf(session, | |
319 | "event {\n" | |
320 | " name = \"%s\";\n" | |
321 | " id = %u;\n" | |
322 | " stream_id = %u;\n", | |
323 | event->name, | |
324 | event->id, | |
325 | chan->chan_id); | |
326 | if (ret) | |
327 | goto end; | |
328 | ||
329 | ret = lttng_metadata_printf(session, | |
330 | " loglevel = %d;\n", | |
331 | event->loglevel); | |
332 | if (ret) | |
333 | goto end; | |
334 | ||
335 | if (event->model_emf_uri) { | |
336 | ret = lttng_metadata_printf(session, | |
337 | " model.emf.uri = \"%s\";\n", | |
338 | event->model_emf_uri); | |
339 | if (ret) | |
340 | goto end; | |
341 | } | |
342 | ||
343 | #if 0 /* context for events not supported */ | |
344 | if (event->ctx) { | |
345 | ret = lttng_metadata_printf(session, | |
346 | " context := struct {\n"); | |
347 | if (ret) | |
348 | goto end; | |
349 | } | |
350 | ret = _lttng_context_metadata_statedump(session, event->ctx); | |
351 | if (ret) | |
352 | goto end; | |
353 | if (event->ctx) { | |
354 | ret = lttng_metadata_printf(session, | |
355 | " };\n"); | |
356 | if (ret) | |
357 | goto end; | |
358 | } | |
359 | #endif | |
360 | ret = lttng_metadata_printf(session, | |
361 | " fields := struct {\n" | |
362 | ); | |
363 | if (ret) | |
364 | goto end; | |
365 | ||
366 | ret = _lttng_fields_metadata_statedump(session, event); | |
367 | if (ret) | |
368 | goto end; | |
369 | ||
370 | ret = lttng_metadata_printf(session, | |
371 | " };\n" | |
372 | "};\n\n"); | |
373 | if (ret) | |
374 | goto end; | |
7972aab2 | 375 | event->metadata_dumped = 1; |
d0b96690 DG |
376 | |
377 | end: | |
378 | return ret; | |
379 | } | |
380 | ||
381 | /* | |
382 | * Should be called with session registry mutex held. | |
383 | */ | |
384 | int ust_metadata_channel_statedump(struct ust_registry_session *session, | |
385 | struct ust_registry_channel *chan) | |
386 | { | |
387 | int ret = 0; | |
388 | ||
389 | /* Don't dump metadata events */ | |
390 | if (chan->chan_id == -1U) | |
391 | return 0; | |
392 | ||
393 | if (!chan->header_type) | |
394 | return -EINVAL; | |
395 | ||
396 | ret = lttng_metadata_printf(session, | |
397 | "stream {\n" | |
398 | " id = %u;\n" | |
399 | " event.header := %s;\n" | |
400 | " packet.context := struct packet_context;\n", | |
401 | chan->chan_id, | |
402 | chan->header_type == USTCTL_CHANNEL_HEADER_COMPACT ? | |
403 | "struct event_header_compact" : | |
404 | "struct event_header_large"); | |
405 | if (ret) | |
406 | goto end; | |
407 | ||
408 | if (chan->ctx_fields) { | |
409 | ret = lttng_metadata_printf(session, | |
410 | " event.context := struct {\n"); | |
411 | if (ret) | |
412 | goto end; | |
413 | } | |
414 | ret = _lttng_context_metadata_statedump(session, | |
415 | chan->nr_ctx_fields, | |
416 | chan->ctx_fields); | |
417 | if (ret) | |
418 | goto end; | |
419 | if (chan->ctx_fields) { | |
420 | ret = lttng_metadata_printf(session, | |
421 | " };\n"); | |
422 | if (ret) | |
423 | goto end; | |
424 | } | |
425 | ||
426 | ret = lttng_metadata_printf(session, | |
427 | "};\n\n"); | |
7972aab2 DG |
428 | /* Flag success of metadata dump. */ |
429 | chan->metadata_dumped = 1; | |
d0b96690 DG |
430 | |
431 | end: | |
432 | return ret; | |
433 | } | |
434 | ||
435 | static | |
436 | int _lttng_stream_packet_context_declare(struct ust_registry_session *session) | |
437 | { | |
438 | return lttng_metadata_printf(session, | |
439 | "struct packet_context {\n" | |
440 | " uint64_clock_monotonic_t timestamp_begin;\n" | |
441 | " uint64_clock_monotonic_t timestamp_end;\n" | |
442 | " uint64_t content_size;\n" | |
443 | " uint64_t packet_size;\n" | |
444 | " unsigned long events_discarded;\n" | |
445 | " uint32_t cpu_id;\n" | |
446 | "};\n\n" | |
447 | ); | |
448 | } | |
449 | ||
450 | /* | |
451 | * Compact header: | |
452 | * id: range: 0 - 30. | |
453 | * id 31 is reserved to indicate an extended header. | |
454 | * | |
455 | * Large header: | |
456 | * id: range: 0 - 65534. | |
457 | * id 65535 is reserved to indicate an extended header. | |
458 | */ | |
459 | static | |
460 | int _lttng_event_header_declare(struct ust_registry_session *session) | |
461 | { | |
462 | return lttng_metadata_printf(session, | |
463 | "struct event_header_compact {\n" | |
464 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" | |
465 | " variant <id> {\n" | |
466 | " struct {\n" | |
467 | " uint27_clock_monotonic_t timestamp;\n" | |
468 | " } compact;\n" | |
469 | " struct {\n" | |
470 | " uint32_t id;\n" | |
471 | " uint64_clock_monotonic_t timestamp;\n" | |
472 | " } extended;\n" | |
473 | " } v;\n" | |
474 | "} align(%u);\n" | |
475 | "\n" | |
476 | "struct event_header_large {\n" | |
477 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" | |
478 | " variant <id> {\n" | |
479 | " struct {\n" | |
480 | " uint32_clock_monotonic_t timestamp;\n" | |
481 | " } compact;\n" | |
482 | " struct {\n" | |
483 | " uint32_t id;\n" | |
484 | " uint64_clock_monotonic_t timestamp;\n" | |
485 | " } extended;\n" | |
486 | " } v;\n" | |
487 | "} align(%u);\n\n", | |
488 | session->uint32_t_alignment, | |
489 | session->uint16_t_alignment | |
490 | ); | |
491 | } | |
492 | ||
493 | /* | |
494 | * Approximation of NTP time of day to clock monotonic correlation, | |
495 | * taken at start of trace. | |
496 | * Yes, this is only an approximation. Yes, we can (and will) do better | |
497 | * in future versions. | |
498 | */ | |
499 | static | |
500 | uint64_t measure_clock_offset(void) | |
501 | { | |
502 | uint64_t offset, monotonic[2], realtime; | |
503 | struct timespec rts = { 0, 0 }; | |
504 | int ret; | |
505 | ||
506 | monotonic[0] = trace_clock_read64(); | |
507 | ret = clock_gettime(CLOCK_REALTIME, &rts); | |
508 | if (ret < 0) | |
509 | return 0; | |
510 | monotonic[1] = trace_clock_read64(); | |
511 | offset = (monotonic[0] + monotonic[1]) >> 1; | |
512 | realtime = (uint64_t) rts.tv_sec * 1000000000ULL; | |
513 | realtime += rts.tv_nsec; | |
514 | offset = realtime - offset; | |
515 | return offset; | |
516 | } | |
517 | ||
518 | ||
519 | /* | |
520 | * Should be called with session registry mutex held. | |
521 | */ | |
522 | int ust_metadata_session_statedump(struct ust_registry_session *session, | |
af6142cf MD |
523 | struct ust_app *app, |
524 | uint32_t major, | |
525 | uint32_t minor) | |
d0b96690 DG |
526 | { |
527 | unsigned char *uuid_c; | |
528 | char uuid_s[UUID_STR_LEN], | |
529 | clock_uuid_s[UUID_STR_LEN]; | |
530 | int ret = 0; | |
531 | char hostname[HOST_NAME_MAX]; | |
532 | ||
7972aab2 | 533 | assert(session); |
7972aab2 | 534 | |
d0b96690 DG |
535 | uuid_c = session->uuid; |
536 | ||
537 | snprintf(uuid_s, sizeof(uuid_s), | |
538 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
539 | uuid_c[0], uuid_c[1], uuid_c[2], uuid_c[3], | |
540 | uuid_c[4], uuid_c[5], uuid_c[6], uuid_c[7], | |
541 | uuid_c[8], uuid_c[9], uuid_c[10], uuid_c[11], | |
542 | uuid_c[12], uuid_c[13], uuid_c[14], uuid_c[15]); | |
543 | ||
544 | ret = lttng_metadata_printf(session, | |
545 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" | |
546 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" | |
547 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" | |
548 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" | |
549 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" | |
550 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" | |
551 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" | |
552 | "\n" | |
553 | "trace {\n" | |
554 | " major = %u;\n" | |
555 | " minor = %u;\n" | |
556 | " uuid = \"%s\";\n" | |
557 | " byte_order = %s;\n" | |
558 | " packet.header := struct {\n" | |
559 | " uint32_t magic;\n" | |
560 | " uint8_t uuid[16];\n" | |
561 | " uint32_t stream_id;\n" | |
562 | " };\n" | |
563 | "};\n\n", | |
564 | session->uint8_t_alignment, | |
565 | session->uint16_t_alignment, | |
566 | session->uint32_t_alignment, | |
567 | session->uint64_t_alignment, | |
568 | session->bits_per_long, | |
569 | session->long_alignment, | |
570 | CTF_SPEC_MAJOR, | |
571 | CTF_SPEC_MINOR, | |
572 | uuid_s, | |
573 | session->byte_order == BIG_ENDIAN ? "be" : "le" | |
574 | ); | |
575 | if (ret) | |
576 | goto end; | |
577 | ||
578 | /* ignore error, just use empty string if error. */ | |
579 | hostname[0] = '\0'; | |
580 | ret = gethostname(hostname, sizeof(hostname)); | |
581 | if (ret && errno == ENAMETOOLONG) | |
582 | hostname[HOST_NAME_MAX - 1] = '\0'; | |
583 | ret = lttng_metadata_printf(session, | |
584 | "env {\n" | |
585 | " hostname = \"%s\";\n" | |
586 | " domain = \"ust\";\n" | |
587 | " tracer_name = \"lttng-ust\";\n" | |
588 | " tracer_major = %u;\n" | |
af6142cf | 589 | " tracer_minor = %u;\n", |
d0b96690 | 590 | hostname, |
af6142cf MD |
591 | major, |
592 | minor | |
d0b96690 DG |
593 | ); |
594 | if (ret) | |
595 | goto end; | |
596 | ||
597 | /* | |
598 | * If per-application registry, we can output extra information | |
599 | * about the application. | |
600 | */ | |
601 | if (app) { | |
602 | ret = lttng_metadata_printf(session, | |
af6142cf | 603 | " tracer_patchlevel = %u;\n" |
d0b96690 | 604 | " vpid = %d;\n" |
d88aee68 | 605 | " procname = \"%s\";\n", |
af6142cf | 606 | app->version.patchlevel, |
d0b96690 DG |
607 | (int) app->pid, |
608 | app->name | |
609 | ); | |
610 | if (ret) | |
611 | goto end; | |
612 | } | |
613 | ||
614 | ret = lttng_metadata_printf(session, | |
615 | "};\n\n" | |
616 | ); | |
617 | if (ret) | |
618 | goto end; | |
619 | ||
620 | ||
621 | ret = lttng_metadata_printf(session, | |
622 | "clock {\n" | |
623 | " name = %s;\n", | |
624 | "monotonic" | |
625 | ); | |
626 | if (ret) | |
627 | goto end; | |
628 | ||
629 | if (!trace_clock_uuid(clock_uuid_s)) { | |
630 | ret = lttng_metadata_printf(session, | |
631 | " uuid = \"%s\";\n", | |
632 | clock_uuid_s | |
633 | ); | |
634 | if (ret) | |
635 | goto end; | |
636 | } | |
637 | ||
638 | ret = lttng_metadata_printf(session, | |
639 | " description = \"Monotonic Clock\";\n" | |
640 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" | |
641 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" | |
642 | " offset = %" PRIu64 ";\n" | |
643 | "};\n\n", | |
644 | trace_clock_freq(), | |
645 | measure_clock_offset() | |
646 | ); | |
647 | if (ret) | |
648 | goto end; | |
649 | ||
650 | ret = lttng_metadata_printf(session, | |
651 | "typealias integer {\n" | |
652 | " size = 27; align = 1; signed = false;\n" | |
653 | " map = clock.monotonic.value;\n" | |
654 | "} := uint27_clock_monotonic_t;\n" | |
655 | "\n" | |
656 | "typealias integer {\n" | |
657 | " size = 32; align = %u; signed = false;\n" | |
658 | " map = clock.monotonic.value;\n" | |
659 | "} := uint32_clock_monotonic_t;\n" | |
660 | "\n" | |
661 | "typealias integer {\n" | |
662 | " size = 64; align = %u; signed = false;\n" | |
663 | " map = clock.monotonic.value;\n" | |
664 | "} := uint64_clock_monotonic_t;\n\n", | |
665 | session->uint32_t_alignment, | |
666 | session->uint64_t_alignment | |
667 | ); | |
668 | if (ret) | |
669 | goto end; | |
670 | ||
671 | ret = _lttng_stream_packet_context_declare(session); | |
672 | if (ret) | |
673 | goto end; | |
674 | ||
675 | ret = _lttng_event_header_declare(session); | |
676 | if (ret) | |
677 | goto end; | |
678 | ||
679 | end: | |
680 | return ret; | |
681 | } |