| 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; |
| 375 | |
| 376 | end: |
| 377 | return ret; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Should be called with session registry mutex held. |
| 382 | */ |
| 383 | int ust_metadata_channel_statedump(struct ust_registry_session *session, |
| 384 | struct ust_registry_channel *chan) |
| 385 | { |
| 386 | int ret = 0; |
| 387 | |
| 388 | /* Don't dump metadata events */ |
| 389 | if (chan->chan_id == -1U) |
| 390 | return 0; |
| 391 | |
| 392 | if (!chan->header_type) |
| 393 | return -EINVAL; |
| 394 | |
| 395 | ret = lttng_metadata_printf(session, |
| 396 | "stream {\n" |
| 397 | " id = %u;\n" |
| 398 | " event.header := %s;\n" |
| 399 | " packet.context := struct packet_context;\n", |
| 400 | chan->chan_id, |
| 401 | chan->header_type == USTCTL_CHANNEL_HEADER_COMPACT ? |
| 402 | "struct event_header_compact" : |
| 403 | "struct event_header_large"); |
| 404 | if (ret) |
| 405 | goto end; |
| 406 | |
| 407 | if (chan->ctx_fields) { |
| 408 | ret = lttng_metadata_printf(session, |
| 409 | " event.context := struct {\n"); |
| 410 | if (ret) |
| 411 | goto end; |
| 412 | } |
| 413 | ret = _lttng_context_metadata_statedump(session, |
| 414 | chan->nr_ctx_fields, |
| 415 | chan->ctx_fields); |
| 416 | if (ret) |
| 417 | goto end; |
| 418 | if (chan->ctx_fields) { |
| 419 | ret = lttng_metadata_printf(session, |
| 420 | " };\n"); |
| 421 | if (ret) |
| 422 | goto end; |
| 423 | } |
| 424 | |
| 425 | ret = lttng_metadata_printf(session, |
| 426 | "};\n\n"); |
| 427 | |
| 428 | end: |
| 429 | return ret; |
| 430 | } |
| 431 | |
| 432 | static |
| 433 | int _lttng_stream_packet_context_declare(struct ust_registry_session *session) |
| 434 | { |
| 435 | return lttng_metadata_printf(session, |
| 436 | "struct packet_context {\n" |
| 437 | " uint64_clock_monotonic_t timestamp_begin;\n" |
| 438 | " uint64_clock_monotonic_t timestamp_end;\n" |
| 439 | " uint64_t content_size;\n" |
| 440 | " uint64_t packet_size;\n" |
| 441 | " unsigned long events_discarded;\n" |
| 442 | " uint32_t cpu_id;\n" |
| 443 | "};\n\n" |
| 444 | ); |
| 445 | } |
| 446 | |
| 447 | /* |
| 448 | * Compact header: |
| 449 | * id: range: 0 - 30. |
| 450 | * id 31 is reserved to indicate an extended header. |
| 451 | * |
| 452 | * Large header: |
| 453 | * id: range: 0 - 65534. |
| 454 | * id 65535 is reserved to indicate an extended header. |
| 455 | */ |
| 456 | static |
| 457 | int _lttng_event_header_declare(struct ust_registry_session *session) |
| 458 | { |
| 459 | return lttng_metadata_printf(session, |
| 460 | "struct event_header_compact {\n" |
| 461 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" |
| 462 | " variant <id> {\n" |
| 463 | " struct {\n" |
| 464 | " uint27_clock_monotonic_t timestamp;\n" |
| 465 | " } compact;\n" |
| 466 | " struct {\n" |
| 467 | " uint32_t id;\n" |
| 468 | " uint64_clock_monotonic_t timestamp;\n" |
| 469 | " } extended;\n" |
| 470 | " } v;\n" |
| 471 | "} align(%u);\n" |
| 472 | "\n" |
| 473 | "struct event_header_large {\n" |
| 474 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" |
| 475 | " variant <id> {\n" |
| 476 | " struct {\n" |
| 477 | " uint32_clock_monotonic_t timestamp;\n" |
| 478 | " } compact;\n" |
| 479 | " struct {\n" |
| 480 | " uint32_t id;\n" |
| 481 | " uint64_clock_monotonic_t timestamp;\n" |
| 482 | " } extended;\n" |
| 483 | " } v;\n" |
| 484 | "} align(%u);\n\n", |
| 485 | session->uint32_t_alignment, |
| 486 | session->uint16_t_alignment |
| 487 | ); |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * Approximation of NTP time of day to clock monotonic correlation, |
| 492 | * taken at start of trace. |
| 493 | * Yes, this is only an approximation. Yes, we can (and will) do better |
| 494 | * in future versions. |
| 495 | */ |
| 496 | static |
| 497 | uint64_t measure_clock_offset(void) |
| 498 | { |
| 499 | uint64_t offset, monotonic[2], realtime; |
| 500 | struct timespec rts = { 0, 0 }; |
| 501 | int ret; |
| 502 | |
| 503 | monotonic[0] = trace_clock_read64(); |
| 504 | ret = clock_gettime(CLOCK_REALTIME, &rts); |
| 505 | if (ret < 0) |
| 506 | return 0; |
| 507 | monotonic[1] = trace_clock_read64(); |
| 508 | offset = (monotonic[0] + monotonic[1]) >> 1; |
| 509 | realtime = (uint64_t) rts.tv_sec * 1000000000ULL; |
| 510 | realtime += rts.tv_nsec; |
| 511 | offset = realtime - offset; |
| 512 | return offset; |
| 513 | } |
| 514 | |
| 515 | |
| 516 | /* |
| 517 | * Should be called with session registry mutex held. |
| 518 | */ |
| 519 | int ust_metadata_session_statedump(struct ust_registry_session *session, |
| 520 | struct ust_app *app) |
| 521 | { |
| 522 | unsigned char *uuid_c; |
| 523 | char uuid_s[UUID_STR_LEN], |
| 524 | clock_uuid_s[UUID_STR_LEN]; |
| 525 | int ret = 0; |
| 526 | char hostname[HOST_NAME_MAX]; |
| 527 | |
| 528 | uuid_c = session->uuid; |
| 529 | |
| 530 | snprintf(uuid_s, sizeof(uuid_s), |
| 531 | "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", |
| 532 | uuid_c[0], uuid_c[1], uuid_c[2], uuid_c[3], |
| 533 | uuid_c[4], uuid_c[5], uuid_c[6], uuid_c[7], |
| 534 | uuid_c[8], uuid_c[9], uuid_c[10], uuid_c[11], |
| 535 | uuid_c[12], uuid_c[13], uuid_c[14], uuid_c[15]); |
| 536 | |
| 537 | ret = lttng_metadata_printf(session, |
| 538 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" |
| 539 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" |
| 540 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" |
| 541 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" |
| 542 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" |
| 543 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" |
| 544 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" |
| 545 | "\n" |
| 546 | "trace {\n" |
| 547 | " major = %u;\n" |
| 548 | " minor = %u;\n" |
| 549 | " uuid = \"%s\";\n" |
| 550 | " byte_order = %s;\n" |
| 551 | " packet.header := struct {\n" |
| 552 | " uint32_t magic;\n" |
| 553 | " uint8_t uuid[16];\n" |
| 554 | " uint32_t stream_id;\n" |
| 555 | " };\n" |
| 556 | "};\n\n", |
| 557 | session->uint8_t_alignment, |
| 558 | session->uint16_t_alignment, |
| 559 | session->uint32_t_alignment, |
| 560 | session->uint64_t_alignment, |
| 561 | session->bits_per_long, |
| 562 | session->long_alignment, |
| 563 | CTF_SPEC_MAJOR, |
| 564 | CTF_SPEC_MINOR, |
| 565 | uuid_s, |
| 566 | session->byte_order == BIG_ENDIAN ? "be" : "le" |
| 567 | ); |
| 568 | if (ret) |
| 569 | goto end; |
| 570 | |
| 571 | /* ignore error, just use empty string if error. */ |
| 572 | hostname[0] = '\0'; |
| 573 | ret = gethostname(hostname, sizeof(hostname)); |
| 574 | if (ret && errno == ENAMETOOLONG) |
| 575 | hostname[HOST_NAME_MAX - 1] = '\0'; |
| 576 | ret = lttng_metadata_printf(session, |
| 577 | "env {\n" |
| 578 | " hostname = \"%s\";\n" |
| 579 | " domain = \"ust\";\n" |
| 580 | " tracer_name = \"lttng-ust\";\n" |
| 581 | " tracer_major = %u;\n" |
| 582 | " tracer_minor = %u;\n" |
| 583 | " tracer_patchlevel = %u;\n", |
| 584 | hostname, |
| 585 | app->version.major, |
| 586 | app->version.minor, |
| 587 | app->version.patchlevel |
| 588 | ); |
| 589 | if (ret) |
| 590 | goto end; |
| 591 | |
| 592 | /* |
| 593 | * If per-application registry, we can output extra information |
| 594 | * about the application. |
| 595 | */ |
| 596 | if (app) { |
| 597 | ret = lttng_metadata_printf(session, |
| 598 | " vpid = %d;\n" |
| 599 | " procname = \"%s\";\n", |
| 600 | (int) app->pid, |
| 601 | app->name |
| 602 | ); |
| 603 | if (ret) |
| 604 | goto end; |
| 605 | } |
| 606 | |
| 607 | ret = lttng_metadata_printf(session, |
| 608 | "};\n\n" |
| 609 | ); |
| 610 | if (ret) |
| 611 | goto end; |
| 612 | |
| 613 | |
| 614 | ret = lttng_metadata_printf(session, |
| 615 | "clock {\n" |
| 616 | " name = %s;\n", |
| 617 | "monotonic" |
| 618 | ); |
| 619 | if (ret) |
| 620 | goto end; |
| 621 | |
| 622 | if (!trace_clock_uuid(clock_uuid_s)) { |
| 623 | ret = lttng_metadata_printf(session, |
| 624 | " uuid = \"%s\";\n", |
| 625 | clock_uuid_s |
| 626 | ); |
| 627 | if (ret) |
| 628 | goto end; |
| 629 | } |
| 630 | |
| 631 | ret = lttng_metadata_printf(session, |
| 632 | " description = \"Monotonic Clock\";\n" |
| 633 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" |
| 634 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" |
| 635 | " offset = %" PRIu64 ";\n" |
| 636 | "};\n\n", |
| 637 | trace_clock_freq(), |
| 638 | measure_clock_offset() |
| 639 | ); |
| 640 | if (ret) |
| 641 | goto end; |
| 642 | |
| 643 | ret = lttng_metadata_printf(session, |
| 644 | "typealias integer {\n" |
| 645 | " size = 27; align = 1; signed = false;\n" |
| 646 | " map = clock.monotonic.value;\n" |
| 647 | "} := uint27_clock_monotonic_t;\n" |
| 648 | "\n" |
| 649 | "typealias integer {\n" |
| 650 | " size = 32; align = %u; signed = false;\n" |
| 651 | " map = clock.monotonic.value;\n" |
| 652 | "} := uint32_clock_monotonic_t;\n" |
| 653 | "\n" |
| 654 | "typealias integer {\n" |
| 655 | " size = 64; align = %u; signed = false;\n" |
| 656 | " map = clock.monotonic.value;\n" |
| 657 | "} := uint64_clock_monotonic_t;\n\n", |
| 658 | session->uint32_t_alignment, |
| 659 | session->uint64_t_alignment |
| 660 | ); |
| 661 | if (ret) |
| 662 | goto end; |
| 663 | |
| 664 | ret = _lttng_stream_packet_context_declare(session); |
| 665 | if (ret) |
| 666 | goto end; |
| 667 | |
| 668 | ret = _lttng_event_header_declare(session); |
| 669 | if (ret) |
| 670 | goto end; |
| 671 | |
| 672 | end: |
| 673 | return ret; |
| 674 | } |