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 | |
6c1c0768 | 23 | #define _LGPL_SOURCE |
d0b96690 DG |
24 | #include <stdint.h> |
25 | #include <string.h> | |
26 | #include <stdarg.h> | |
27 | #include <stdio.h> | |
28 | #include <limits.h> | |
29 | #include <unistd.h> | |
30 | #include <inttypes.h> | |
31 | #include <common/common.h> | |
32 | ||
33 | #include "ust-registry.h" | |
34 | #include "ust-clock.h" | |
35 | #include "ust-app.h" | |
36 | ||
37 | #ifndef max_t | |
38 | #define max_t(type, a, b) ((type) ((a) > (b) ? (a) : (b))) | |
39 | #endif | |
40 | ||
6e1b0543 | 41 | #define NSEC_PER_SEC 1000000000ULL |
8c645bb0 MD |
42 | #define NR_CLOCK_OFFSET_SAMPLES 10 |
43 | ||
44 | struct offset_sample { | |
45 | uint64_t offset; /* correlation offset */ | |
46 | uint64_t measure_delta; /* lower is better */ | |
47 | }; | |
48 | ||
d0b96690 DG |
49 | static inline |
50 | int fls(unsigned int x) | |
51 | { | |
52 | int r = 32; | |
53 | ||
54 | if (!x) | |
55 | return 0; | |
56 | if (!(x & 0xFFFF0000U)) { | |
57 | x <<= 16; | |
58 | r -= 16; | |
59 | } | |
60 | if (!(x & 0xFF000000U)) { | |
61 | x <<= 8; | |
62 | r -= 8; | |
63 | } | |
64 | if (!(x & 0xF0000000U)) { | |
65 | x <<= 4; | |
66 | r -= 4; | |
67 | } | |
68 | if (!(x & 0xC0000000U)) { | |
69 | x <<= 2; | |
70 | r -= 2; | |
71 | } | |
72 | if (!(x & 0x80000000U)) { | |
73 | x <<= 1; | |
74 | r -= 1; | |
75 | } | |
76 | return r; | |
77 | } | |
78 | ||
79 | static inline | |
80 | int get_count_order(unsigned int count) | |
81 | { | |
82 | int order; | |
83 | ||
84 | order = fls(count) - 1; | |
85 | if (count & (count - 1)) | |
86 | order++; | |
87 | return order; | |
88 | } | |
89 | ||
90 | /* | |
91 | * Returns offset where to write in metadata array, or negative error value on error. | |
92 | */ | |
93 | static | |
94 | ssize_t metadata_reserve(struct ust_registry_session *session, size_t len) | |
95 | { | |
96 | size_t new_len = session->metadata_len + len; | |
97 | size_t new_alloc_len = new_len; | |
98 | size_t old_alloc_len = session->metadata_alloc_len; | |
99 | ssize_t ret; | |
100 | ||
101 | if (new_alloc_len > (UINT32_MAX >> 1)) | |
102 | return -EINVAL; | |
103 | if ((old_alloc_len << 1) > (UINT32_MAX >> 1)) | |
104 | return -EINVAL; | |
105 | ||
106 | if (new_alloc_len > old_alloc_len) { | |
107 | char *newptr; | |
108 | ||
109 | new_alloc_len = | |
110 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
111 | newptr = realloc(session->metadata, new_alloc_len); | |
112 | if (!newptr) | |
113 | return -ENOMEM; | |
114 | session->metadata = newptr; | |
115 | /* We zero directly the memory from start of allocation. */ | |
116 | memset(&session->metadata[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
117 | session->metadata_alloc_len = new_alloc_len; | |
118 | } | |
119 | ret = session->metadata_len; | |
120 | session->metadata_len += len; | |
121 | return ret; | |
122 | } | |
123 | ||
d7ba1388 MD |
124 | static |
125 | int metadata_file_append(struct ust_registry_session *session, | |
126 | const char *str, size_t len) | |
127 | { | |
128 | ssize_t written; | |
129 | ||
130 | if (session->metadata_fd < 0) { | |
131 | return 0; | |
132 | } | |
133 | /* Write to metadata file */ | |
134 | written = lttng_write(session->metadata_fd, str, len); | |
135 | if (written != len) { | |
136 | return -1; | |
137 | } | |
138 | return 0; | |
139 | } | |
140 | ||
d0b96690 DG |
141 | /* |
142 | * We have exclusive access to our metadata buffer (protected by the | |
143 | * ust_lock), so we can do racy operations such as looking for | |
144 | * remaining space left in packet and write, since mutual exclusion | |
145 | * protects us from concurrent writes. | |
146 | */ | |
147 | static | |
148 | int lttng_metadata_printf(struct ust_registry_session *session, | |
149 | const char *fmt, ...) | |
150 | { | |
151 | char *str = NULL; | |
152 | size_t len; | |
153 | va_list ap; | |
154 | ssize_t offset; | |
155 | int ret; | |
156 | ||
157 | va_start(ap, fmt); | |
158 | ret = vasprintf(&str, fmt, ap); | |
159 | va_end(ap); | |
160 | if (ret < 0) | |
161 | return -ENOMEM; | |
162 | ||
163 | len = strlen(str); | |
164 | offset = metadata_reserve(session, len); | |
165 | if (offset < 0) { | |
166 | ret = offset; | |
167 | goto end; | |
168 | } | |
169 | memcpy(&session->metadata[offset], str, len); | |
d7ba1388 MD |
170 | ret = metadata_file_append(session, str, len); |
171 | if (ret) { | |
172 | PERROR("Error appending to metadata file"); | |
173 | goto end; | |
174 | } | |
d0b96690 DG |
175 | DBG3("Append to metadata: \"%s\"", str); |
176 | ret = 0; | |
177 | ||
178 | end: | |
179 | free(str); | |
180 | return ret; | |
181 | } | |
182 | ||
183 | static | |
184 | int _lttng_field_statedump(struct ust_registry_session *session, | |
185 | const struct ustctl_field *field) | |
186 | { | |
187 | int ret = 0; | |
188 | const char *bo_be = " byte_order = be;"; | |
189 | const char *bo_le = " byte_order = le;"; | |
190 | const char *bo_native = ""; | |
191 | const char *bo_reverse; | |
192 | ||
193 | if (session->byte_order == BIG_ENDIAN) | |
194 | bo_reverse = bo_le; | |
195 | else | |
196 | bo_reverse = bo_be; | |
197 | ||
198 | switch (field->type.atype) { | |
199 | case ustctl_atype_integer: | |
200 | ret = lttng_metadata_printf(session, | |
201 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", | |
202 | field->type.u.basic.integer.size, | |
203 | field->type.u.basic.integer.alignment, | |
204 | field->type.u.basic.integer.signedness, | |
205 | (field->type.u.basic.integer.encoding == ustctl_encode_none) | |
206 | ? "none" | |
207 | : (field->type.u.basic.integer.encoding == ustctl_encode_UTF8) | |
208 | ? "UTF8" | |
209 | : "ASCII", | |
210 | field->type.u.basic.integer.base, | |
211 | field->type.u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
212 | field->name); | |
213 | break; | |
214 | case ustctl_atype_float: | |
215 | ret = lttng_metadata_printf(session, | |
216 | " floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", | |
217 | field->type.u.basic._float.exp_dig, | |
218 | field->type.u.basic._float.mant_dig, | |
219 | field->type.u.basic._float.alignment, | |
220 | field->type.u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
221 | field->name); | |
222 | break; | |
223 | case ustctl_atype_enum: | |
224 | return -EINVAL; | |
225 | case ustctl_atype_array: | |
226 | { | |
227 | const struct ustctl_basic_type *elem_type; | |
228 | ||
229 | elem_type = &field->type.u.array.elem_type; | |
230 | ret = lttng_metadata_printf(session, | |
231 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", | |
232 | elem_type->u.basic.integer.size, | |
233 | elem_type->u.basic.integer.alignment, | |
234 | elem_type->u.basic.integer.signedness, | |
235 | (elem_type->u.basic.integer.encoding == ustctl_encode_none) | |
236 | ? "none" | |
237 | : (elem_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
238 | ? "UTF8" | |
239 | : "ASCII", | |
240 | elem_type->u.basic.integer.base, | |
241 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
242 | field->name, field->type.u.array.length); | |
243 | break; | |
244 | } | |
245 | case ustctl_atype_sequence: | |
246 | { | |
247 | const struct ustctl_basic_type *elem_type; | |
248 | const struct ustctl_basic_type *length_type; | |
249 | ||
250 | elem_type = &field->type.u.sequence.elem_type; | |
251 | length_type = &field->type.u.sequence.length_type; | |
252 | ret = lttng_metadata_printf(session, | |
253 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", | |
254 | length_type->u.basic.integer.size, | |
255 | (unsigned int) length_type->u.basic.integer.alignment, | |
256 | length_type->u.basic.integer.signedness, | |
257 | (length_type->u.basic.integer.encoding == ustctl_encode_none) | |
258 | ? "none" | |
259 | : ((length_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
260 | ? "UTF8" | |
261 | : "ASCII"), | |
262 | length_type->u.basic.integer.base, | |
263 | length_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
264 | field->name); | |
265 | if (ret) | |
266 | return ret; | |
267 | ||
268 | ret = lttng_metadata_printf(session, | |
269 | " integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", | |
270 | elem_type->u.basic.integer.size, | |
271 | (unsigned int) elem_type->u.basic.integer.alignment, | |
272 | elem_type->u.basic.integer.signedness, | |
273 | (elem_type->u.basic.integer.encoding == ustctl_encode_none) | |
274 | ? "none" | |
275 | : ((elem_type->u.basic.integer.encoding == ustctl_encode_UTF8) | |
276 | ? "UTF8" | |
277 | : "ASCII"), | |
278 | elem_type->u.basic.integer.base, | |
279 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
280 | field->name, | |
281 | field->name); | |
282 | break; | |
283 | } | |
284 | ||
285 | case ustctl_atype_string: | |
286 | /* Default encoding is UTF8 */ | |
287 | ret = lttng_metadata_printf(session, | |
288 | " string%s _%s;\n", | |
289 | field->type.u.basic.string.encoding == ustctl_encode_ASCII ? | |
290 | " { encoding = ASCII; }" : "", | |
291 | field->name); | |
292 | break; | |
293 | default: | |
294 | return -EINVAL; | |
295 | } | |
296 | return ret; | |
297 | } | |
298 | ||
299 | static | |
300 | int _lttng_context_metadata_statedump(struct ust_registry_session *session, | |
301 | size_t nr_ctx_fields, | |
302 | struct ustctl_field *ctx) | |
303 | { | |
304 | int ret = 0; | |
305 | int i; | |
306 | ||
307 | if (!ctx) | |
308 | return 0; | |
309 | for (i = 0; i < nr_ctx_fields; i++) { | |
310 | const struct ustctl_field *field = &ctx[i]; | |
311 | ||
312 | ret = _lttng_field_statedump(session, field); | |
313 | if (ret) | |
314 | return ret; | |
315 | } | |
316 | return ret; | |
317 | } | |
318 | ||
319 | static | |
320 | int _lttng_fields_metadata_statedump(struct ust_registry_session *session, | |
321 | struct ust_registry_event *event) | |
322 | { | |
323 | int ret = 0; | |
324 | int i; | |
325 | ||
326 | for (i = 0; i < event->nr_fields; i++) { | |
327 | const struct ustctl_field *field = &event->fields[i]; | |
328 | ||
329 | ret = _lttng_field_statedump(session, field); | |
330 | if (ret) | |
331 | return ret; | |
332 | } | |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* | |
337 | * Should be called with session registry mutex held. | |
338 | */ | |
339 | int ust_metadata_event_statedump(struct ust_registry_session *session, | |
340 | struct ust_registry_channel *chan, | |
341 | struct ust_registry_event *event) | |
342 | { | |
343 | int ret = 0; | |
344 | ||
345 | /* Don't dump metadata events */ | |
346 | if (chan->chan_id == -1U) | |
347 | return 0; | |
348 | ||
349 | ret = lttng_metadata_printf(session, | |
350 | "event {\n" | |
351 | " name = \"%s\";\n" | |
352 | " id = %u;\n" | |
353 | " stream_id = %u;\n", | |
354 | event->name, | |
355 | event->id, | |
356 | chan->chan_id); | |
357 | if (ret) | |
358 | goto end; | |
359 | ||
360 | ret = lttng_metadata_printf(session, | |
361 | " loglevel = %d;\n", | |
362 | event->loglevel); | |
363 | if (ret) | |
364 | goto end; | |
365 | ||
366 | if (event->model_emf_uri) { | |
367 | ret = lttng_metadata_printf(session, | |
368 | " model.emf.uri = \"%s\";\n", | |
369 | event->model_emf_uri); | |
370 | if (ret) | |
371 | goto end; | |
372 | } | |
373 | ||
374 | #if 0 /* context for events not supported */ | |
375 | if (event->ctx) { | |
376 | ret = lttng_metadata_printf(session, | |
377 | " context := struct {\n"); | |
378 | if (ret) | |
379 | goto end; | |
380 | } | |
381 | ret = _lttng_context_metadata_statedump(session, event->ctx); | |
382 | if (ret) | |
383 | goto end; | |
384 | if (event->ctx) { | |
385 | ret = lttng_metadata_printf(session, | |
386 | " };\n"); | |
387 | if (ret) | |
388 | goto end; | |
389 | } | |
390 | #endif | |
391 | ret = lttng_metadata_printf(session, | |
392 | " fields := struct {\n" | |
393 | ); | |
394 | if (ret) | |
395 | goto end; | |
396 | ||
397 | ret = _lttng_fields_metadata_statedump(session, event); | |
398 | if (ret) | |
399 | goto end; | |
400 | ||
401 | ret = lttng_metadata_printf(session, | |
402 | " };\n" | |
403 | "};\n\n"); | |
404 | if (ret) | |
405 | goto end; | |
7972aab2 | 406 | event->metadata_dumped = 1; |
d0b96690 DG |
407 | |
408 | end: | |
409 | return ret; | |
410 | } | |
411 | ||
412 | /* | |
413 | * Should be called with session registry mutex held. | |
414 | */ | |
415 | int ust_metadata_channel_statedump(struct ust_registry_session *session, | |
416 | struct ust_registry_channel *chan) | |
417 | { | |
418 | int ret = 0; | |
419 | ||
420 | /* Don't dump metadata events */ | |
421 | if (chan->chan_id == -1U) | |
422 | return 0; | |
423 | ||
424 | if (!chan->header_type) | |
425 | return -EINVAL; | |
426 | ||
427 | ret = lttng_metadata_printf(session, | |
428 | "stream {\n" | |
429 | " id = %u;\n" | |
430 | " event.header := %s;\n" | |
431 | " packet.context := struct packet_context;\n", | |
432 | chan->chan_id, | |
433 | chan->header_type == USTCTL_CHANNEL_HEADER_COMPACT ? | |
434 | "struct event_header_compact" : | |
435 | "struct event_header_large"); | |
436 | if (ret) | |
437 | goto end; | |
438 | ||
439 | if (chan->ctx_fields) { | |
440 | ret = lttng_metadata_printf(session, | |
441 | " event.context := struct {\n"); | |
442 | if (ret) | |
443 | goto end; | |
444 | } | |
445 | ret = _lttng_context_metadata_statedump(session, | |
446 | chan->nr_ctx_fields, | |
447 | chan->ctx_fields); | |
448 | if (ret) | |
449 | goto end; | |
450 | if (chan->ctx_fields) { | |
451 | ret = lttng_metadata_printf(session, | |
452 | " };\n"); | |
453 | if (ret) | |
454 | goto end; | |
455 | } | |
456 | ||
457 | ret = lttng_metadata_printf(session, | |
458 | "};\n\n"); | |
7972aab2 DG |
459 | /* Flag success of metadata dump. */ |
460 | chan->metadata_dumped = 1; | |
d0b96690 DG |
461 | |
462 | end: | |
463 | return ret; | |
464 | } | |
465 | ||
466 | static | |
467 | int _lttng_stream_packet_context_declare(struct ust_registry_session *session) | |
468 | { | |
469 | return lttng_metadata_printf(session, | |
470 | "struct packet_context {\n" | |
471 | " uint64_clock_monotonic_t timestamp_begin;\n" | |
472 | " uint64_clock_monotonic_t timestamp_end;\n" | |
473 | " uint64_t content_size;\n" | |
474 | " uint64_t packet_size;\n" | |
475 | " unsigned long events_discarded;\n" | |
476 | " uint32_t cpu_id;\n" | |
477 | "};\n\n" | |
478 | ); | |
479 | } | |
480 | ||
481 | /* | |
482 | * Compact header: | |
483 | * id: range: 0 - 30. | |
484 | * id 31 is reserved to indicate an extended header. | |
485 | * | |
486 | * Large header: | |
487 | * id: range: 0 - 65534. | |
488 | * id 65535 is reserved to indicate an extended header. | |
489 | */ | |
490 | static | |
491 | int _lttng_event_header_declare(struct ust_registry_session *session) | |
492 | { | |
493 | return lttng_metadata_printf(session, | |
494 | "struct event_header_compact {\n" | |
495 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" | |
496 | " variant <id> {\n" | |
497 | " struct {\n" | |
498 | " uint27_clock_monotonic_t timestamp;\n" | |
499 | " } compact;\n" | |
500 | " struct {\n" | |
501 | " uint32_t id;\n" | |
502 | " uint64_clock_monotonic_t timestamp;\n" | |
503 | " } extended;\n" | |
504 | " } v;\n" | |
505 | "} align(%u);\n" | |
506 | "\n" | |
507 | "struct event_header_large {\n" | |
508 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" | |
509 | " variant <id> {\n" | |
510 | " struct {\n" | |
511 | " uint32_clock_monotonic_t timestamp;\n" | |
512 | " } compact;\n" | |
513 | " struct {\n" | |
514 | " uint32_t id;\n" | |
515 | " uint64_clock_monotonic_t timestamp;\n" | |
516 | " } extended;\n" | |
517 | " } v;\n" | |
518 | "} align(%u);\n\n", | |
519 | session->uint32_t_alignment, | |
520 | session->uint16_t_alignment | |
521 | ); | |
522 | } | |
523 | ||
d0b96690 | 524 | static |
8c645bb0 | 525 | int measure_single_clock_offset(struct offset_sample *sample) |
d0b96690 | 526 | { |
8c645bb0 | 527 | uint64_t offset, monotonic[2], measure_delta, realtime; |
fc0bb9fa | 528 | uint64_t tcf = trace_clock_freq(); |
d0b96690 DG |
529 | struct timespec rts = { 0, 0 }; |
530 | int ret; | |
531 | ||
532 | monotonic[0] = trace_clock_read64(); | |
533 | ret = clock_gettime(CLOCK_REALTIME, &rts); | |
8c645bb0 MD |
534 | if (ret < 0) { |
535 | return ret; | |
536 | } | |
d0b96690 | 537 | monotonic[1] = trace_clock_read64(); |
8c645bb0 MD |
538 | measure_delta = monotonic[1] - monotonic[0]; |
539 | if (measure_delta > sample->measure_delta) { | |
540 | /* | |
541 | * Discard value if it took longer to read than the best | |
542 | * sample so far. | |
543 | */ | |
544 | return 0; | |
545 | } | |
d0b96690 | 546 | offset = (monotonic[0] + monotonic[1]) >> 1; |
6e1b0543 MD |
547 | realtime = (uint64_t) rts.tv_sec * tcf; |
548 | if (tcf == NSEC_PER_SEC) { | |
549 | realtime += rts.tv_nsec; | |
550 | } else { | |
551 | realtime += (uint64_t) rts.tv_nsec * tcf / NSEC_PER_SEC; | |
fc0bb9fa | 552 | } |
d0b96690 | 553 | offset = realtime - offset; |
8c645bb0 MD |
554 | sample->offset = offset; |
555 | sample->measure_delta = measure_delta; | |
556 | return 0; | |
d0b96690 DG |
557 | } |
558 | ||
8c645bb0 MD |
559 | /* |
560 | * Approximation of NTP time of day to clock monotonic correlation, | |
561 | * taken at start of trace. Keep the measurement that took the less time | |
562 | * to complete, thus removing imprecision caused by preemption. | |
563 | */ | |
564 | static | |
565 | uint64_t measure_clock_offset(void) | |
566 | { | |
567 | int i; | |
568 | struct offset_sample offset_best_sample = { | |
569 | .offset = 0, | |
570 | .measure_delta = UINT64_MAX, | |
571 | }; | |
572 | ||
573 | for (i = 0; i < NR_CLOCK_OFFSET_SAMPLES; i++) { | |
574 | if (measure_single_clock_offset(&offset_best_sample)) { | |
575 | return 0; | |
576 | } | |
577 | } | |
578 | return offset_best_sample.offset; | |
579 | } | |
d0b96690 DG |
580 | |
581 | /* | |
582 | * Should be called with session registry mutex held. | |
583 | */ | |
584 | int ust_metadata_session_statedump(struct ust_registry_session *session, | |
af6142cf MD |
585 | struct ust_app *app, |
586 | uint32_t major, | |
587 | uint32_t minor) | |
d0b96690 DG |
588 | { |
589 | unsigned char *uuid_c; | |
590 | char uuid_s[UUID_STR_LEN], | |
591 | clock_uuid_s[UUID_STR_LEN]; | |
592 | int ret = 0; | |
593 | char hostname[HOST_NAME_MAX]; | |
594 | ||
7972aab2 | 595 | assert(session); |
7972aab2 | 596 | |
d0b96690 DG |
597 | uuid_c = session->uuid; |
598 | ||
599 | snprintf(uuid_s, sizeof(uuid_s), | |
600 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", | |
601 | uuid_c[0], uuid_c[1], uuid_c[2], uuid_c[3], | |
602 | uuid_c[4], uuid_c[5], uuid_c[6], uuid_c[7], | |
603 | uuid_c[8], uuid_c[9], uuid_c[10], uuid_c[11], | |
604 | uuid_c[12], uuid_c[13], uuid_c[14], uuid_c[15]); | |
605 | ||
d7ba1388 MD |
606 | /* For crash ABI */ |
607 | ret = lttng_metadata_printf(session, | |
608 | "/* CTF %u.%u */\n\n", | |
609 | CTF_SPEC_MAJOR, | |
610 | CTF_SPEC_MINOR); | |
611 | if (ret) { | |
612 | goto end; | |
613 | } | |
614 | ||
d0b96690 DG |
615 | ret = lttng_metadata_printf(session, |
616 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" | |
617 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" | |
618 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" | |
619 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" | |
620 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" | |
621 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" | |
622 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" | |
623 | "\n" | |
624 | "trace {\n" | |
625 | " major = %u;\n" | |
626 | " minor = %u;\n" | |
627 | " uuid = \"%s\";\n" | |
628 | " byte_order = %s;\n" | |
629 | " packet.header := struct {\n" | |
630 | " uint32_t magic;\n" | |
631 | " uint8_t uuid[16];\n" | |
632 | " uint32_t stream_id;\n" | |
633 | " };\n" | |
634 | "};\n\n", | |
635 | session->uint8_t_alignment, | |
636 | session->uint16_t_alignment, | |
637 | session->uint32_t_alignment, | |
638 | session->uint64_t_alignment, | |
639 | session->bits_per_long, | |
640 | session->long_alignment, | |
641 | CTF_SPEC_MAJOR, | |
642 | CTF_SPEC_MINOR, | |
643 | uuid_s, | |
644 | session->byte_order == BIG_ENDIAN ? "be" : "le" | |
645 | ); | |
646 | if (ret) | |
647 | goto end; | |
648 | ||
649 | /* ignore error, just use empty string if error. */ | |
650 | hostname[0] = '\0'; | |
651 | ret = gethostname(hostname, sizeof(hostname)); | |
652 | if (ret && errno == ENAMETOOLONG) | |
653 | hostname[HOST_NAME_MAX - 1] = '\0'; | |
654 | ret = lttng_metadata_printf(session, | |
655 | "env {\n" | |
656 | " hostname = \"%s\";\n" | |
657 | " domain = \"ust\";\n" | |
658 | " tracer_name = \"lttng-ust\";\n" | |
659 | " tracer_major = %u;\n" | |
af6142cf | 660 | " tracer_minor = %u;\n", |
d0b96690 | 661 | hostname, |
af6142cf MD |
662 | major, |
663 | minor | |
d0b96690 DG |
664 | ); |
665 | if (ret) | |
666 | goto end; | |
667 | ||
668 | /* | |
669 | * If per-application registry, we can output extra information | |
670 | * about the application. | |
671 | */ | |
672 | if (app) { | |
673 | ret = lttng_metadata_printf(session, | |
af6142cf | 674 | " tracer_patchlevel = %u;\n" |
d0b96690 | 675 | " vpid = %d;\n" |
d88aee68 | 676 | " procname = \"%s\";\n", |
af6142cf | 677 | app->version.patchlevel, |
d0b96690 DG |
678 | (int) app->pid, |
679 | app->name | |
680 | ); | |
681 | if (ret) | |
682 | goto end; | |
683 | } | |
684 | ||
685 | ret = lttng_metadata_printf(session, | |
686 | "};\n\n" | |
687 | ); | |
688 | if (ret) | |
689 | goto end; | |
690 | ||
691 | ||
692 | ret = lttng_metadata_printf(session, | |
693 | "clock {\n" | |
fc0bb9fa MD |
694 | " name = \"%s\";\n", |
695 | trace_clock_name() | |
d0b96690 DG |
696 | ); |
697 | if (ret) | |
698 | goto end; | |
699 | ||
700 | if (!trace_clock_uuid(clock_uuid_s)) { | |
701 | ret = lttng_metadata_printf(session, | |
702 | " uuid = \"%s\";\n", | |
703 | clock_uuid_s | |
704 | ); | |
705 | if (ret) | |
706 | goto end; | |
707 | } | |
708 | ||
709 | ret = lttng_metadata_printf(session, | |
fc0bb9fa | 710 | " description = \"%s\";\n" |
d0b96690 DG |
711 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" |
712 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" | |
713 | " offset = %" PRIu64 ";\n" | |
714 | "};\n\n", | |
fc0bb9fa | 715 | trace_clock_description(), |
d0b96690 DG |
716 | trace_clock_freq(), |
717 | measure_clock_offset() | |
718 | ); | |
719 | if (ret) | |
720 | goto end; | |
721 | ||
722 | ret = lttng_metadata_printf(session, | |
723 | "typealias integer {\n" | |
724 | " size = 27; align = 1; signed = false;\n" | |
fc0bb9fa | 725 | " map = clock.%s.value;\n" |
d0b96690 DG |
726 | "} := uint27_clock_monotonic_t;\n" |
727 | "\n" | |
728 | "typealias integer {\n" | |
729 | " size = 32; align = %u; signed = false;\n" | |
fc0bb9fa | 730 | " map = clock.%s.value;\n" |
d0b96690 DG |
731 | "} := uint32_clock_monotonic_t;\n" |
732 | "\n" | |
733 | "typealias integer {\n" | |
734 | " size = 64; align = %u; signed = false;\n" | |
fc0bb9fa | 735 | " map = clock.%s.value;\n" |
d0b96690 | 736 | "} := uint64_clock_monotonic_t;\n\n", |
fc0bb9fa | 737 | trace_clock_name(), |
d0b96690 | 738 | session->uint32_t_alignment, |
fc0bb9fa MD |
739 | trace_clock_name(), |
740 | session->uint64_t_alignment, | |
741 | trace_clock_name() | |
d0b96690 DG |
742 | ); |
743 | if (ret) | |
744 | goto end; | |
745 | ||
746 | ret = _lttng_stream_packet_context_declare(session); | |
747 | if (ret) | |
748 | goto end; | |
749 | ||
750 | ret = _lttng_event_header_declare(session); | |
751 | if (ret) | |
752 | goto end; | |
753 | ||
754 | end: | |
755 | return ret; | |
756 | } |