| 1 | /* |
| 2 | * Copyright (C) 2010-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #define _LGPL_SOURCE |
| 9 | #include <stdint.h> |
| 10 | #include <string.h> |
| 11 | #include <stdarg.h> |
| 12 | #include <stdio.h> |
| 13 | #include <limits.h> |
| 14 | #include <unistd.h> |
| 15 | #include <inttypes.h> |
| 16 | #include <common/common.hpp> |
| 17 | #include <common/time.hpp> |
| 18 | |
| 19 | #include "ust-registry.hpp" |
| 20 | #include "ust-clock.hpp" |
| 21 | #include "ust-app.hpp" |
| 22 | |
| 23 | #define NR_CLOCK_OFFSET_SAMPLES 10 |
| 24 | |
| 25 | struct offset_sample { |
| 26 | int64_t offset; /* correlation offset */ |
| 27 | uint64_t measure_delta; /* lower is better */ |
| 28 | }; |
| 29 | |
| 30 | static |
| 31 | int _lttng_field_statedump(struct ust_registry_session *session, |
| 32 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 33 | size_t *iter_field, size_t nesting); |
| 34 | |
| 35 | static inline |
| 36 | int get_count_order(unsigned int count) |
| 37 | { |
| 38 | int order; |
| 39 | |
| 40 | order = lttng_fls(count) - 1; |
| 41 | if (count & (count - 1)) { |
| 42 | order++; |
| 43 | } |
| 44 | LTTNG_ASSERT(order >= 0); |
| 45 | return order; |
| 46 | } |
| 47 | |
| 48 | /* |
| 49 | * Returns offset where to write in metadata array, or negative error value on error. |
| 50 | */ |
| 51 | static |
| 52 | ssize_t metadata_reserve(struct ust_registry_session *session, size_t len) |
| 53 | { |
| 54 | size_t new_len = session->metadata_len + len; |
| 55 | size_t new_alloc_len = new_len; |
| 56 | size_t old_alloc_len = session->metadata_alloc_len; |
| 57 | ssize_t ret; |
| 58 | |
| 59 | if (new_alloc_len > (UINT32_MAX >> 1)) |
| 60 | return -EINVAL; |
| 61 | if ((old_alloc_len << 1) > (UINT32_MAX >> 1)) |
| 62 | return -EINVAL; |
| 63 | |
| 64 | if (new_alloc_len > old_alloc_len) { |
| 65 | char *newptr; |
| 66 | |
| 67 | new_alloc_len = |
| 68 | std::max<size_t>(1U << get_count_order(new_alloc_len), old_alloc_len << 1); |
| 69 | newptr = (char *) realloc(session->metadata, new_alloc_len); |
| 70 | if (!newptr) |
| 71 | return -ENOMEM; |
| 72 | session->metadata = newptr; |
| 73 | /* We zero directly the memory from start of allocation. */ |
| 74 | memset(&session->metadata[old_alloc_len], 0, new_alloc_len - old_alloc_len); |
| 75 | session->metadata_alloc_len = new_alloc_len; |
| 76 | } |
| 77 | ret = session->metadata_len; |
| 78 | session->metadata_len += len; |
| 79 | return ret; |
| 80 | } |
| 81 | |
| 82 | static |
| 83 | int metadata_file_append(struct ust_registry_session *session, |
| 84 | const char *str, size_t len) |
| 85 | { |
| 86 | ssize_t written; |
| 87 | |
| 88 | if (session->metadata_fd < 0) { |
| 89 | return 0; |
| 90 | } |
| 91 | /* Write to metadata file */ |
| 92 | written = lttng_write(session->metadata_fd, str, len); |
| 93 | if (written != len) { |
| 94 | return -1; |
| 95 | } |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * We have exclusive access to our metadata buffer (protected by the |
| 101 | * ust_lock), so we can do racy operations such as looking for |
| 102 | * remaining space left in packet and write, since mutual exclusion |
| 103 | * protects us from concurrent writes. |
| 104 | */ |
| 105 | static ATTR_FORMAT_PRINTF(2, 3) |
| 106 | int lttng_metadata_printf(struct ust_registry_session *session, |
| 107 | const char *fmt, ...) |
| 108 | { |
| 109 | char *str = NULL; |
| 110 | size_t len; |
| 111 | va_list ap; |
| 112 | ssize_t offset; |
| 113 | int ret; |
| 114 | |
| 115 | va_start(ap, fmt); |
| 116 | ret = vasprintf(&str, fmt, ap); |
| 117 | va_end(ap); |
| 118 | if (ret < 0) |
| 119 | return -ENOMEM; |
| 120 | |
| 121 | len = strlen(str); |
| 122 | offset = metadata_reserve(session, len); |
| 123 | if (offset < 0) { |
| 124 | ret = offset; |
| 125 | goto end; |
| 126 | } |
| 127 | memcpy(&session->metadata[offset], str, len); |
| 128 | ret = metadata_file_append(session, str, len); |
| 129 | if (ret) { |
| 130 | PERROR("Error appending to metadata file"); |
| 131 | goto end; |
| 132 | } |
| 133 | DBG3("Append to metadata: \"%s\"", str); |
| 134 | ret = 0; |
| 135 | |
| 136 | end: |
| 137 | free(str); |
| 138 | return ret; |
| 139 | } |
| 140 | |
| 141 | static |
| 142 | int print_tabs(struct ust_registry_session *session, size_t nesting) |
| 143 | { |
| 144 | size_t i; |
| 145 | |
| 146 | for (i = 0; i < nesting; i++) { |
| 147 | int ret; |
| 148 | |
| 149 | ret = lttng_metadata_printf(session, " "); |
| 150 | if (ret) { |
| 151 | return ret; |
| 152 | } |
| 153 | } |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static |
| 158 | void sanitize_ctf_identifier(char *out, const char *in) |
| 159 | { |
| 160 | size_t i; |
| 161 | |
| 162 | for (i = 0; i < LTTNG_UST_ABI_SYM_NAME_LEN; i++) { |
| 163 | switch (in[i]) { |
| 164 | case '.': |
| 165 | case '$': |
| 166 | case ':': |
| 167 | out[i] = '_'; |
| 168 | break; |
| 169 | default: |
| 170 | out[i] = in[i]; |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | static |
| 176 | int print_escaped_ctf_string(struct ust_registry_session *session, const char *string) |
| 177 | { |
| 178 | int ret = 0; |
| 179 | size_t i; |
| 180 | char cur; |
| 181 | |
| 182 | i = 0; |
| 183 | cur = string[i]; |
| 184 | while (cur != '\0') { |
| 185 | switch (cur) { |
| 186 | case '\n': |
| 187 | ret = lttng_metadata_printf(session, "%s", "\\n"); |
| 188 | break; |
| 189 | case '\\': |
| 190 | case '"': |
| 191 | ret = lttng_metadata_printf(session, "%c", '\\'); |
| 192 | if (ret) { |
| 193 | goto error; |
| 194 | } |
| 195 | /* We still print the current char */ |
| 196 | /* Fallthrough */ |
| 197 | default: |
| 198 | ret = lttng_metadata_printf(session, "%c", cur); |
| 199 | break; |
| 200 | } |
| 201 | |
| 202 | if (ret) { |
| 203 | goto error; |
| 204 | } |
| 205 | |
| 206 | cur = string[++i]; |
| 207 | } |
| 208 | error: |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | /* Called with session registry mutex held. */ |
| 213 | static |
| 214 | int ust_metadata_enum_statedump(struct ust_registry_session *session, |
| 215 | const char *enum_name, |
| 216 | uint64_t enum_id, |
| 217 | const struct lttng_ust_ctl_integer_type *container_type, |
| 218 | const char *field_name, size_t *iter_field, size_t nesting) |
| 219 | { |
| 220 | struct ust_registry_enum *reg_enum; |
| 221 | const struct lttng_ust_ctl_enum_entry *entries; |
| 222 | size_t nr_entries; |
| 223 | int ret = 0; |
| 224 | size_t i; |
| 225 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
| 226 | |
| 227 | rcu_read_lock(); |
| 228 | reg_enum = ust_registry_lookup_enum_by_id(session, enum_name, enum_id); |
| 229 | rcu_read_unlock(); |
| 230 | /* reg_enum can still be used because session registry mutex is held. */ |
| 231 | if (!reg_enum) { |
| 232 | ret = -ENOENT; |
| 233 | goto end; |
| 234 | } |
| 235 | entries = reg_enum->entries; |
| 236 | nr_entries = reg_enum->nr_entries; |
| 237 | |
| 238 | ret = print_tabs(session, nesting); |
| 239 | if (ret) { |
| 240 | goto end; |
| 241 | } |
| 242 | ret = lttng_metadata_printf(session, |
| 243 | "enum : integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u; } {\n", |
| 244 | container_type->size, |
| 245 | container_type->alignment, |
| 246 | container_type->signedness, |
| 247 | (container_type->encoding == lttng_ust_ctl_encode_none) |
| 248 | ? "none" |
| 249 | : (container_type->encoding == lttng_ust_ctl_encode_UTF8) |
| 250 | ? "UTF8" |
| 251 | : "ASCII", |
| 252 | container_type->base); |
| 253 | if (ret) { |
| 254 | goto end; |
| 255 | } |
| 256 | nesting++; |
| 257 | /* Dump all entries */ |
| 258 | for (i = 0; i < nr_entries; i++) { |
| 259 | const struct lttng_ust_ctl_enum_entry *entry = &entries[i]; |
| 260 | int j, len; |
| 261 | |
| 262 | ret = print_tabs(session, nesting); |
| 263 | if (ret) { |
| 264 | goto end; |
| 265 | } |
| 266 | ret = lttng_metadata_printf(session, |
| 267 | "\""); |
| 268 | if (ret) { |
| 269 | goto end; |
| 270 | } |
| 271 | len = strlen(entry->string); |
| 272 | /* Escape the character '"' */ |
| 273 | for (j = 0; j < len; j++) { |
| 274 | char c = entry->string[j]; |
| 275 | |
| 276 | switch (c) { |
| 277 | case '"': |
| 278 | ret = lttng_metadata_printf(session, |
| 279 | "\\\""); |
| 280 | break; |
| 281 | case '\\': |
| 282 | ret = lttng_metadata_printf(session, |
| 283 | "\\\\"); |
| 284 | break; |
| 285 | default: |
| 286 | ret = lttng_metadata_printf(session, |
| 287 | "%c", c); |
| 288 | break; |
| 289 | } |
| 290 | if (ret) { |
| 291 | goto end; |
| 292 | } |
| 293 | } |
| 294 | ret = lttng_metadata_printf(session, "\""); |
| 295 | if (ret) { |
| 296 | goto end; |
| 297 | } |
| 298 | |
| 299 | if (entry->u.extra.options & |
| 300 | LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO) { |
| 301 | ret = lttng_metadata_printf(session, ",\n"); |
| 302 | if (ret) { |
| 303 | goto end; |
| 304 | } |
| 305 | } else { |
| 306 | ret = lttng_metadata_printf(session, |
| 307 | " = "); |
| 308 | if (ret) { |
| 309 | goto end; |
| 310 | } |
| 311 | |
| 312 | if (entry->start.signedness) { |
| 313 | ret = lttng_metadata_printf(session, |
| 314 | "%" PRId64, entry->start.value); |
| 315 | } else { |
| 316 | ret = lttng_metadata_printf(session, |
| 317 | "%" PRIu64, entry->start.value); |
| 318 | } |
| 319 | if (ret) { |
| 320 | goto end; |
| 321 | } |
| 322 | |
| 323 | if (entry->start.signedness == entry->end.signedness && |
| 324 | entry->start.value == |
| 325 | entry->end.value) { |
| 326 | ret = lttng_metadata_printf(session, ",\n"); |
| 327 | } else { |
| 328 | if (entry->end.signedness) { |
| 329 | ret = lttng_metadata_printf(session, |
| 330 | " ... %" PRId64 ",\n", |
| 331 | entry->end.value); |
| 332 | } else { |
| 333 | ret = lttng_metadata_printf(session, |
| 334 | " ... %" PRIu64 ",\n", |
| 335 | entry->end.value); |
| 336 | } |
| 337 | } |
| 338 | if (ret) { |
| 339 | goto end; |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | nesting--; |
| 344 | sanitize_ctf_identifier(identifier, field_name); |
| 345 | ret = print_tabs(session, nesting); |
| 346 | if (ret) { |
| 347 | goto end; |
| 348 | } |
| 349 | ret = lttng_metadata_printf(session, "} _%s;\n", |
| 350 | identifier); |
| 351 | end: |
| 352 | (*iter_field)++; |
| 353 | return ret; |
| 354 | } |
| 355 | |
| 356 | static |
| 357 | int _lttng_variant_statedump(struct ust_registry_session *session, |
| 358 | uint32_t nr_choices, const char *tag_name, |
| 359 | uint32_t alignment, |
| 360 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 361 | size_t *iter_field, size_t nesting) |
| 362 | { |
| 363 | const struct lttng_ust_ctl_field *variant = &fields[*iter_field]; |
| 364 | uint32_t i; |
| 365 | int ret; |
| 366 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
| 367 | |
| 368 | (*iter_field)++; |
| 369 | sanitize_ctf_identifier(identifier, tag_name); |
| 370 | if (alignment) { |
| 371 | ret = print_tabs(session, nesting); |
| 372 | if (ret) { |
| 373 | goto end; |
| 374 | } |
| 375 | ret = lttng_metadata_printf(session, |
| 376 | "struct { } align(%u) _%s_padding;\n", |
| 377 | alignment * CHAR_BIT, |
| 378 | variant->name); |
| 379 | if (ret) { |
| 380 | goto end; |
| 381 | } |
| 382 | } |
| 383 | ret = print_tabs(session, nesting); |
| 384 | if (ret) { |
| 385 | goto end; |
| 386 | } |
| 387 | ret = lttng_metadata_printf(session, |
| 388 | "variant <_%s> {\n", |
| 389 | identifier); |
| 390 | if (ret) { |
| 391 | goto end; |
| 392 | } |
| 393 | |
| 394 | for (i = 0; i < nr_choices; i++) { |
| 395 | if (*iter_field >= nr_fields) { |
| 396 | ret = -EOVERFLOW; |
| 397 | goto end; |
| 398 | } |
| 399 | ret = _lttng_field_statedump(session, |
| 400 | fields, nr_fields, |
| 401 | iter_field, nesting + 1); |
| 402 | if (ret) { |
| 403 | goto end; |
| 404 | } |
| 405 | } |
| 406 | sanitize_ctf_identifier(identifier, variant->name); |
| 407 | ret = print_tabs(session, nesting); |
| 408 | if (ret) { |
| 409 | goto end; |
| 410 | } |
| 411 | ret = lttng_metadata_printf(session, |
| 412 | "} _%s;\n", |
| 413 | identifier); |
| 414 | if (ret) { |
| 415 | goto end; |
| 416 | } |
| 417 | end: |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | static |
| 422 | int _lttng_field_statedump(struct ust_registry_session *session, |
| 423 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 424 | size_t *iter_field, size_t nesting) |
| 425 | { |
| 426 | int ret = 0; |
| 427 | const char *bo_be = " byte_order = be;"; |
| 428 | const char *bo_le = " byte_order = le;"; |
| 429 | const char *bo_native = ""; |
| 430 | const char *bo_reverse; |
| 431 | const struct lttng_ust_ctl_field *field; |
| 432 | |
| 433 | if (*iter_field >= nr_fields) { |
| 434 | ret = -EOVERFLOW; |
| 435 | goto end; |
| 436 | } |
| 437 | field = &fields[*iter_field]; |
| 438 | |
| 439 | if (session->byte_order == BIG_ENDIAN) { |
| 440 | bo_reverse = bo_le; |
| 441 | } else { |
| 442 | bo_reverse = bo_be; |
| 443 | } |
| 444 | |
| 445 | switch (field->type.atype) { |
| 446 | case lttng_ust_ctl_atype_integer: |
| 447 | ret = print_tabs(session, nesting); |
| 448 | if (ret) { |
| 449 | goto end; |
| 450 | } |
| 451 | ret = lttng_metadata_printf(session, |
| 452 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", |
| 453 | field->type.u.integer.size, |
| 454 | field->type.u.integer.alignment, |
| 455 | field->type.u.integer.signedness, |
| 456 | (field->type.u.integer.encoding == lttng_ust_ctl_encode_none) |
| 457 | ? "none" |
| 458 | : (field->type.u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 459 | ? "UTF8" |
| 460 | : "ASCII", |
| 461 | field->type.u.integer.base, |
| 462 | field->type.u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 463 | field->name); |
| 464 | (*iter_field)++; |
| 465 | break; |
| 466 | case lttng_ust_ctl_atype_enum: |
| 467 | ret = ust_metadata_enum_statedump(session, |
| 468 | field->type.u.legacy.basic.enumeration.name, |
| 469 | field->type.u.legacy.basic.enumeration.id, |
| 470 | &field->type.u.legacy.basic.enumeration.container_type, |
| 471 | field->name, iter_field, nesting); |
| 472 | break; |
| 473 | case lttng_ust_ctl_atype_float: |
| 474 | ret = print_tabs(session, nesting); |
| 475 | if (ret) { |
| 476 | goto end; |
| 477 | } |
| 478 | ret = lttng_metadata_printf(session, |
| 479 | "floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", |
| 480 | field->type.u._float.exp_dig, |
| 481 | field->type.u._float.mant_dig, |
| 482 | field->type.u._float.alignment, |
| 483 | field->type.u._float.reverse_byte_order ? bo_reverse : bo_native, |
| 484 | field->name); |
| 485 | (*iter_field)++; |
| 486 | break; |
| 487 | case lttng_ust_ctl_atype_array: |
| 488 | { |
| 489 | const struct lttng_ust_ctl_basic_type *elem_type; |
| 490 | |
| 491 | ret = print_tabs(session, nesting); |
| 492 | if (ret) { |
| 493 | goto end; |
| 494 | } |
| 495 | elem_type = &field->type.u.legacy.array.elem_type; |
| 496 | /* Only integers are currently supported in arrays. */ |
| 497 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 498 | ret = -EINVAL; |
| 499 | goto end; |
| 500 | } |
| 501 | ret = lttng_metadata_printf(session, |
| 502 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
| 503 | elem_type->u.basic.integer.size, |
| 504 | elem_type->u.basic.integer.alignment, |
| 505 | elem_type->u.basic.integer.signedness, |
| 506 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 507 | ? "none" |
| 508 | : (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 509 | ? "UTF8" |
| 510 | : "ASCII", |
| 511 | elem_type->u.basic.integer.base, |
| 512 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 513 | field->name, field->type.u.legacy.array.length); |
| 514 | (*iter_field)++; |
| 515 | break; |
| 516 | } |
| 517 | case lttng_ust_ctl_atype_array_nestable: |
| 518 | { |
| 519 | uint32_t array_length; |
| 520 | const struct lttng_ust_ctl_field *array_nestable; |
| 521 | const struct lttng_ust_ctl_type *elem_type; |
| 522 | |
| 523 | array_length = field->type.u.array_nestable.length; |
| 524 | (*iter_field)++; |
| 525 | |
| 526 | if (*iter_field >= nr_fields) { |
| 527 | ret = -EOVERFLOW; |
| 528 | goto end; |
| 529 | } |
| 530 | array_nestable = &fields[*iter_field]; |
| 531 | elem_type = &array_nestable->type; |
| 532 | |
| 533 | /* Only integers are currently supported in arrays. */ |
| 534 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 535 | ret = -EINVAL; |
| 536 | goto end; |
| 537 | } |
| 538 | |
| 539 | if (field->type.u.array_nestable.alignment) { |
| 540 | ret = print_tabs(session, nesting); |
| 541 | if (ret) { |
| 542 | goto end; |
| 543 | } |
| 544 | ret = lttng_metadata_printf(session, |
| 545 | "struct { } align(%u) _%s_padding;\n", |
| 546 | field->type.u.array_nestable.alignment * CHAR_BIT, |
| 547 | field->name); |
| 548 | if (ret) { |
| 549 | goto end; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | ret = print_tabs(session, nesting); |
| 554 | if (ret) { |
| 555 | goto end; |
| 556 | } |
| 557 | ret = lttng_metadata_printf(session, |
| 558 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
| 559 | elem_type->u.integer.size, |
| 560 | elem_type->u.integer.alignment, |
| 561 | elem_type->u.integer.signedness, |
| 562 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
| 563 | ? "none" |
| 564 | : (elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 565 | ? "UTF8" |
| 566 | : "ASCII", |
| 567 | elem_type->u.integer.base, |
| 568 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 569 | field->name, array_length); |
| 570 | (*iter_field)++; |
| 571 | break; |
| 572 | } |
| 573 | case lttng_ust_ctl_atype_sequence: |
| 574 | { |
| 575 | const struct lttng_ust_ctl_basic_type *elem_type; |
| 576 | const struct lttng_ust_ctl_basic_type *length_type; |
| 577 | |
| 578 | elem_type = &field->type.u.legacy.sequence.elem_type; |
| 579 | length_type = &field->type.u.legacy.sequence.length_type; |
| 580 | ret = print_tabs(session, nesting); |
| 581 | if (ret) { |
| 582 | goto end; |
| 583 | } |
| 584 | |
| 585 | /* Only integers are currently supported in sequences. */ |
| 586 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 587 | ret = -EINVAL; |
| 588 | goto end; |
| 589 | } |
| 590 | |
| 591 | ret = lttng_metadata_printf(session, |
| 592 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", |
| 593 | length_type->u.basic.integer.size, |
| 594 | (unsigned int) length_type->u.basic.integer.alignment, |
| 595 | length_type->u.basic.integer.signedness, |
| 596 | (length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 597 | ? "none" |
| 598 | : ((length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 599 | ? "UTF8" |
| 600 | : "ASCII"), |
| 601 | length_type->u.basic.integer.base, |
| 602 | length_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 603 | field->name); |
| 604 | if (ret) { |
| 605 | goto end; |
| 606 | } |
| 607 | |
| 608 | ret = print_tabs(session, nesting); |
| 609 | if (ret) { |
| 610 | goto end; |
| 611 | } |
| 612 | ret = lttng_metadata_printf(session, |
| 613 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", |
| 614 | elem_type->u.basic.integer.size, |
| 615 | (unsigned int) elem_type->u.basic.integer.alignment, |
| 616 | elem_type->u.basic.integer.signedness, |
| 617 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 618 | ? "none" |
| 619 | : ((elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 620 | ? "UTF8" |
| 621 | : "ASCII"), |
| 622 | elem_type->u.basic.integer.base, |
| 623 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 624 | field->name, |
| 625 | field->name); |
| 626 | (*iter_field)++; |
| 627 | break; |
| 628 | } |
| 629 | case lttng_ust_ctl_atype_sequence_nestable: |
| 630 | { |
| 631 | const struct lttng_ust_ctl_field *sequence_nestable; |
| 632 | const struct lttng_ust_ctl_type *elem_type; |
| 633 | |
| 634 | (*iter_field)++; |
| 635 | if (*iter_field >= nr_fields) { |
| 636 | ret = -EOVERFLOW; |
| 637 | goto end; |
| 638 | } |
| 639 | sequence_nestable = &fields[*iter_field]; |
| 640 | elem_type = &sequence_nestable->type; |
| 641 | |
| 642 | /* Only integers are currently supported in sequences. */ |
| 643 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 644 | ret = -EINVAL; |
| 645 | goto end; |
| 646 | } |
| 647 | |
| 648 | if (field->type.u.sequence_nestable.alignment) { |
| 649 | ret = print_tabs(session, nesting); |
| 650 | if (ret) { |
| 651 | goto end; |
| 652 | } |
| 653 | ret = lttng_metadata_printf(session, |
| 654 | "struct { } align(%u) _%s_padding;\n", |
| 655 | field->type.u.sequence_nestable.alignment * CHAR_BIT, |
| 656 | field->name); |
| 657 | if (ret) { |
| 658 | goto end; |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | ret = print_tabs(session, nesting); |
| 663 | if (ret) { |
| 664 | goto end; |
| 665 | } |
| 666 | ret = lttng_metadata_printf(session, |
| 667 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ _%s ];\n", |
| 668 | elem_type->u.integer.size, |
| 669 | (unsigned int) elem_type->u.integer.alignment, |
| 670 | elem_type->u.integer.signedness, |
| 671 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
| 672 | ? "none" |
| 673 | : ((elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 674 | ? "UTF8" |
| 675 | : "ASCII"), |
| 676 | elem_type->u.integer.base, |
| 677 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 678 | field->name, |
| 679 | field->type.u.sequence_nestable.length_name); |
| 680 | (*iter_field)++; |
| 681 | break; |
| 682 | } |
| 683 | case lttng_ust_ctl_atype_string: |
| 684 | /* Default encoding is UTF8 */ |
| 685 | ret = print_tabs(session, nesting); |
| 686 | if (ret) { |
| 687 | goto end; |
| 688 | } |
| 689 | ret = lttng_metadata_printf(session, |
| 690 | "string%s _%s;\n", |
| 691 | field->type.u.string.encoding == lttng_ust_ctl_encode_ASCII ? |
| 692 | " { encoding = ASCII; }" : "", |
| 693 | field->name); |
| 694 | (*iter_field)++; |
| 695 | break; |
| 696 | case lttng_ust_ctl_atype_variant: |
| 697 | ret = _lttng_variant_statedump(session, |
| 698 | field->type.u.legacy.variant.nr_choices, |
| 699 | field->type.u.legacy.variant.tag_name, |
| 700 | 0, |
| 701 | fields, nr_fields, iter_field, nesting); |
| 702 | if (ret) { |
| 703 | goto end; |
| 704 | } |
| 705 | break; |
| 706 | case lttng_ust_ctl_atype_variant_nestable: |
| 707 | ret = _lttng_variant_statedump(session, |
| 708 | field->type.u.variant_nestable.nr_choices, |
| 709 | field->type.u.variant_nestable.tag_name, |
| 710 | field->type.u.variant_nestable.alignment, |
| 711 | fields, nr_fields, iter_field, nesting); |
| 712 | if (ret) { |
| 713 | goto end; |
| 714 | } |
| 715 | break; |
| 716 | case lttng_ust_ctl_atype_struct: |
| 717 | if (field->type.u.legacy._struct.nr_fields != 0) { |
| 718 | /* Currently only 0-length structures are supported. */ |
| 719 | ret = -EINVAL; |
| 720 | goto end; |
| 721 | } |
| 722 | ret = print_tabs(session, nesting); |
| 723 | if (ret) { |
| 724 | goto end; |
| 725 | } |
| 726 | ret = lttng_metadata_printf(session, |
| 727 | "struct {} _%s;\n", |
| 728 | field->name); |
| 729 | (*iter_field)++; |
| 730 | break; |
| 731 | case lttng_ust_ctl_atype_struct_nestable: |
| 732 | if (field->type.u.struct_nestable.nr_fields != 0) { |
| 733 | /* Currently only 0-length structures are supported. */ |
| 734 | ret = -EINVAL; |
| 735 | goto end; |
| 736 | } |
| 737 | ret = print_tabs(session, nesting); |
| 738 | if (ret) { |
| 739 | goto end; |
| 740 | } |
| 741 | if (field->type.u.struct_nestable.alignment) { |
| 742 | ret = lttng_metadata_printf(session, |
| 743 | "struct {} align(%u) _%s;\n", |
| 744 | field->type.u.struct_nestable.alignment * CHAR_BIT, |
| 745 | field->name); |
| 746 | if (ret) { |
| 747 | goto end; |
| 748 | } |
| 749 | } else { |
| 750 | ret = lttng_metadata_printf(session, |
| 751 | "struct {} _%s;\n", |
| 752 | field->name); |
| 753 | } |
| 754 | (*iter_field)++; |
| 755 | break; |
| 756 | case lttng_ust_ctl_atype_enum_nestable: |
| 757 | { |
| 758 | const struct lttng_ust_ctl_field *container_field; |
| 759 | const struct lttng_ust_ctl_type *container_type; |
| 760 | |
| 761 | (*iter_field)++; |
| 762 | if (*iter_field >= nr_fields) { |
| 763 | ret = -EOVERFLOW; |
| 764 | goto end; |
| 765 | } |
| 766 | container_field = &fields[*iter_field]; |
| 767 | container_type = &container_field->type; |
| 768 | |
| 769 | /* Only integers are supported as container types. */ |
| 770 | if (container_type->atype != lttng_ust_ctl_atype_integer) { |
| 771 | ret = -EINVAL; |
| 772 | goto end; |
| 773 | } |
| 774 | ret = ust_metadata_enum_statedump(session, |
| 775 | field->type.u.enum_nestable.name, |
| 776 | field->type.u.enum_nestable.id, |
| 777 | &container_type->u.integer, |
| 778 | field->name, iter_field, nesting); |
| 779 | break; |
| 780 | } |
| 781 | default: |
| 782 | ret = -EINVAL; |
| 783 | } |
| 784 | end: |
| 785 | return ret; |
| 786 | } |
| 787 | |
| 788 | static |
| 789 | int _lttng_context_metadata_statedump(struct ust_registry_session *session, |
| 790 | size_t nr_ctx_fields, |
| 791 | struct lttng_ust_ctl_field *ctx) |
| 792 | { |
| 793 | int ret = 0; |
| 794 | size_t i = 0; |
| 795 | |
| 796 | if (!ctx) |
| 797 | return 0; |
| 798 | for (;;) { |
| 799 | if (i >= nr_ctx_fields) { |
| 800 | break; |
| 801 | } |
| 802 | ret = _lttng_field_statedump(session, ctx, |
| 803 | nr_ctx_fields, &i, 2); |
| 804 | if (ret) { |
| 805 | break; |
| 806 | } |
| 807 | } |
| 808 | return ret; |
| 809 | } |
| 810 | |
| 811 | static |
| 812 | int _lttng_fields_metadata_statedump(struct ust_registry_session *session, |
| 813 | struct ust_registry_event *event) |
| 814 | { |
| 815 | int ret = 0; |
| 816 | size_t i = 0; |
| 817 | |
| 818 | for (;;) { |
| 819 | if (i >= event->nr_fields) { |
| 820 | break; |
| 821 | } |
| 822 | ret = _lttng_field_statedump(session, event->fields, |
| 823 | event->nr_fields, &i, 2); |
| 824 | if (ret) { |
| 825 | break; |
| 826 | } |
| 827 | } |
| 828 | return ret; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Should be called with session registry mutex held. |
| 833 | */ |
| 834 | int ust_metadata_event_statedump(struct ust_registry_session *session, |
| 835 | struct ust_registry_channel *chan, |
| 836 | struct ust_registry_event *event) |
| 837 | { |
| 838 | int ret = 0; |
| 839 | |
| 840 | /* Don't dump metadata events */ |
| 841 | if (chan->chan_id == -1U) |
| 842 | return 0; |
| 843 | |
| 844 | ret = lttng_metadata_printf(session, |
| 845 | "event {\n" |
| 846 | " name = \"%s\";\n" |
| 847 | " id = %u;\n" |
| 848 | " stream_id = %u;\n", |
| 849 | event->name, |
| 850 | event->id, |
| 851 | chan->chan_id); |
| 852 | if (ret) { |
| 853 | goto end; |
| 854 | } |
| 855 | |
| 856 | ret = lttng_metadata_printf(session, |
| 857 | " loglevel = %d;\n", |
| 858 | event->loglevel_value); |
| 859 | if (ret) { |
| 860 | goto end; |
| 861 | } |
| 862 | |
| 863 | if (event->model_emf_uri) { |
| 864 | ret = lttng_metadata_printf(session, |
| 865 | " model.emf.uri = \"%s\";\n", |
| 866 | event->model_emf_uri); |
| 867 | if (ret) { |
| 868 | goto end; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | ret = lttng_metadata_printf(session, |
| 873 | " fields := struct {\n" |
| 874 | ); |
| 875 | if (ret) { |
| 876 | goto end; |
| 877 | } |
| 878 | |
| 879 | ret = _lttng_fields_metadata_statedump(session, event); |
| 880 | if (ret) { |
| 881 | goto end; |
| 882 | } |
| 883 | |
| 884 | ret = lttng_metadata_printf(session, |
| 885 | " };\n" |
| 886 | "};\n\n"); |
| 887 | if (ret) { |
| 888 | goto end; |
| 889 | } |
| 890 | event->metadata_dumped = 1; |
| 891 | |
| 892 | end: |
| 893 | return ret; |
| 894 | } |
| 895 | |
| 896 | /* |
| 897 | * Should be called with session registry mutex held. |
| 898 | */ |
| 899 | int ust_metadata_channel_statedump(struct ust_registry_session *session, |
| 900 | struct ust_registry_channel *chan) |
| 901 | { |
| 902 | int ret = 0; |
| 903 | |
| 904 | /* Don't dump metadata events */ |
| 905 | if (chan->chan_id == -1U) |
| 906 | return 0; |
| 907 | |
| 908 | if (!chan->header_type) |
| 909 | return -EINVAL; |
| 910 | |
| 911 | ret = lttng_metadata_printf(session, |
| 912 | "stream {\n" |
| 913 | " id = %u;\n" |
| 914 | " event.header := %s;\n" |
| 915 | " packet.context := struct packet_context;\n", |
| 916 | chan->chan_id, |
| 917 | chan->header_type == LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT ? |
| 918 | "struct event_header_compact" : |
| 919 | "struct event_header_large"); |
| 920 | if (ret) { |
| 921 | goto end; |
| 922 | } |
| 923 | |
| 924 | if (chan->ctx_fields) { |
| 925 | ret = lttng_metadata_printf(session, |
| 926 | " event.context := struct {\n"); |
| 927 | if (ret) { |
| 928 | goto end; |
| 929 | } |
| 930 | } |
| 931 | ret = _lttng_context_metadata_statedump(session, |
| 932 | chan->nr_ctx_fields, |
| 933 | chan->ctx_fields); |
| 934 | if (ret) { |
| 935 | goto end; |
| 936 | } |
| 937 | if (chan->ctx_fields) { |
| 938 | ret = lttng_metadata_printf(session, |
| 939 | " };\n"); |
| 940 | if (ret) { |
| 941 | goto end; |
| 942 | } |
| 943 | } |
| 944 | |
| 945 | ret = lttng_metadata_printf(session, |
| 946 | "};\n\n"); |
| 947 | /* Flag success of metadata dump. */ |
| 948 | chan->metadata_dumped = 1; |
| 949 | |
| 950 | end: |
| 951 | return ret; |
| 952 | } |
| 953 | |
| 954 | static |
| 955 | int _lttng_stream_packet_context_declare(struct ust_registry_session *session) |
| 956 | { |
| 957 | return lttng_metadata_printf(session, |
| 958 | "struct packet_context {\n" |
| 959 | " uint64_clock_monotonic_t timestamp_begin;\n" |
| 960 | " uint64_clock_monotonic_t timestamp_end;\n" |
| 961 | " uint64_t content_size;\n" |
| 962 | " uint64_t packet_size;\n" |
| 963 | " uint64_t packet_seq_num;\n" |
| 964 | " unsigned long events_discarded;\n" |
| 965 | " uint32_t cpu_id;\n" |
| 966 | "};\n\n" |
| 967 | ); |
| 968 | } |
| 969 | |
| 970 | /* |
| 971 | * Compact header: |
| 972 | * id: range: 0 - 30. |
| 973 | * id 31 is reserved to indicate an extended header. |
| 974 | * |
| 975 | * Large header: |
| 976 | * id: range: 0 - 65534. |
| 977 | * id 65535 is reserved to indicate an extended header. |
| 978 | */ |
| 979 | static |
| 980 | int _lttng_event_header_declare(struct ust_registry_session *session) |
| 981 | { |
| 982 | return lttng_metadata_printf(session, |
| 983 | "struct event_header_compact {\n" |
| 984 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" |
| 985 | " variant <id> {\n" |
| 986 | " struct {\n" |
| 987 | " uint27_clock_monotonic_t timestamp;\n" |
| 988 | " } compact;\n" |
| 989 | " struct {\n" |
| 990 | " uint32_t id;\n" |
| 991 | " uint64_clock_monotonic_t timestamp;\n" |
| 992 | " } extended;\n" |
| 993 | " } v;\n" |
| 994 | "} align(%u);\n" |
| 995 | "\n" |
| 996 | "struct event_header_large {\n" |
| 997 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" |
| 998 | " variant <id> {\n" |
| 999 | " struct {\n" |
| 1000 | " uint32_clock_monotonic_t timestamp;\n" |
| 1001 | " } compact;\n" |
| 1002 | " struct {\n" |
| 1003 | " uint32_t id;\n" |
| 1004 | " uint64_clock_monotonic_t timestamp;\n" |
| 1005 | " } extended;\n" |
| 1006 | " } v;\n" |
| 1007 | "} align(%u);\n\n", |
| 1008 | session->uint32_t_alignment, |
| 1009 | session->uint16_t_alignment |
| 1010 | ); |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * The offset between monotonic and realtime clock can be negative if |
| 1015 | * the system sets the REALTIME clock to 0 after boot. |
| 1016 | */ |
| 1017 | static |
| 1018 | int measure_single_clock_offset(struct offset_sample *sample) |
| 1019 | { |
| 1020 | uint64_t monotonic_avg, monotonic[2], measure_delta, realtime; |
| 1021 | uint64_t tcf = trace_clock_freq(); |
| 1022 | struct timespec rts = { 0, 0 }; |
| 1023 | int ret; |
| 1024 | |
| 1025 | monotonic[0] = trace_clock_read64(); |
| 1026 | ret = lttng_clock_gettime(CLOCK_REALTIME, &rts); |
| 1027 | if (ret < 0) { |
| 1028 | return ret; |
| 1029 | } |
| 1030 | monotonic[1] = trace_clock_read64(); |
| 1031 | measure_delta = monotonic[1] - monotonic[0]; |
| 1032 | if (measure_delta > sample->measure_delta) { |
| 1033 | /* |
| 1034 | * Discard value if it took longer to read than the best |
| 1035 | * sample so far. |
| 1036 | */ |
| 1037 | return 0; |
| 1038 | } |
| 1039 | monotonic_avg = (monotonic[0] + monotonic[1]) >> 1; |
| 1040 | realtime = (uint64_t) rts.tv_sec * tcf; |
| 1041 | if (tcf == NSEC_PER_SEC) { |
| 1042 | realtime += rts.tv_nsec; |
| 1043 | } else { |
| 1044 | realtime += (uint64_t) rts.tv_nsec * tcf / NSEC_PER_SEC; |
| 1045 | } |
| 1046 | sample->offset = (int64_t) realtime - monotonic_avg; |
| 1047 | sample->measure_delta = measure_delta; |
| 1048 | return 0; |
| 1049 | } |
| 1050 | |
| 1051 | /* |
| 1052 | * Approximation of NTP time of day to clock monotonic correlation, |
| 1053 | * taken at start of trace. Keep the measurement that took the less time |
| 1054 | * to complete, thus removing imprecision caused by preemption. |
| 1055 | * May return a negative offset. |
| 1056 | */ |
| 1057 | static |
| 1058 | int64_t measure_clock_offset(void) |
| 1059 | { |
| 1060 | int i; |
| 1061 | struct offset_sample offset_best_sample = { |
| 1062 | .offset = 0, |
| 1063 | .measure_delta = UINT64_MAX, |
| 1064 | }; |
| 1065 | |
| 1066 | for (i = 0; i < NR_CLOCK_OFFSET_SAMPLES; i++) { |
| 1067 | if (measure_single_clock_offset(&offset_best_sample)) { |
| 1068 | return 0; |
| 1069 | } |
| 1070 | } |
| 1071 | return offset_best_sample.offset; |
| 1072 | } |
| 1073 | |
| 1074 | static |
| 1075 | int print_metadata_session_information(struct ust_registry_session *registry) |
| 1076 | { |
| 1077 | int ret; |
| 1078 | struct ltt_session *session = NULL; |
| 1079 | char creation_datetime[ISO8601_STR_LEN]; |
| 1080 | |
| 1081 | rcu_read_lock(); |
| 1082 | session = session_find_by_id(registry->tracing_id); |
| 1083 | if (!session) { |
| 1084 | ret = -1; |
| 1085 | goto error; |
| 1086 | } |
| 1087 | |
| 1088 | /* Print the trace name */ |
| 1089 | ret = lttng_metadata_printf(registry, " trace_name = \""); |
| 1090 | if (ret) { |
| 1091 | goto error; |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * This is necessary since the creation time is present in the session |
| 1096 | * name when it is generated. |
| 1097 | */ |
| 1098 | if (session->has_auto_generated_name) { |
| 1099 | ret = print_escaped_ctf_string(registry, DEFAULT_SESSION_NAME); |
| 1100 | } else { |
| 1101 | ret = print_escaped_ctf_string(registry, session->name); |
| 1102 | } |
| 1103 | if (ret) { |
| 1104 | goto error; |
| 1105 | } |
| 1106 | |
| 1107 | ret = lttng_metadata_printf(registry, "\";\n"); |
| 1108 | if (ret) { |
| 1109 | goto error; |
| 1110 | } |
| 1111 | |
| 1112 | /* Prepare creation time */ |
| 1113 | ret = time_to_iso8601_str(session->creation_time, creation_datetime, |
| 1114 | sizeof(creation_datetime)); |
| 1115 | if (ret) { |
| 1116 | goto error; |
| 1117 | } |
| 1118 | |
| 1119 | /* Output the reste of the information */ |
| 1120 | ret = lttng_metadata_printf(registry, |
| 1121 | " trace_creation_datetime = \"%s\";\n" |
| 1122 | " hostname = \"%s\";\n", |
| 1123 | creation_datetime, session->hostname); |
| 1124 | if (ret) { |
| 1125 | goto error; |
| 1126 | } |
| 1127 | |
| 1128 | error: |
| 1129 | if (session) { |
| 1130 | session_put(session); |
| 1131 | } |
| 1132 | rcu_read_unlock(); |
| 1133 | return ret; |
| 1134 | } |
| 1135 | |
| 1136 | static |
| 1137 | int print_metadata_app_information(struct ust_registry_session *registry, |
| 1138 | struct ust_app *app) |
| 1139 | { |
| 1140 | int ret; |
| 1141 | char datetime[ISO8601_STR_LEN]; |
| 1142 | |
| 1143 | if (!app) { |
| 1144 | ret = 0; |
| 1145 | goto end; |
| 1146 | } |
| 1147 | |
| 1148 | ret = time_to_iso8601_str( |
| 1149 | app->registration_time, datetime, sizeof(datetime)); |
| 1150 | if (ret) { |
| 1151 | goto end; |
| 1152 | } |
| 1153 | |
| 1154 | ret = lttng_metadata_printf(registry, |
| 1155 | " tracer_patchlevel = %u;\n" |
| 1156 | " vpid = %d;\n" |
| 1157 | " procname = \"%s\";\n" |
| 1158 | " vpid_datetime = \"%s\";\n", |
| 1159 | app->version.patchlevel, (int) app->pid, app->name, |
| 1160 | datetime); |
| 1161 | |
| 1162 | end: |
| 1163 | return ret; |
| 1164 | } |
| 1165 | |
| 1166 | /* |
| 1167 | * Should be called with session registry mutex held. |
| 1168 | */ |
| 1169 | int ust_metadata_session_statedump(struct ust_registry_session *session, |
| 1170 | struct ust_app *app, |
| 1171 | uint32_t major, |
| 1172 | uint32_t minor) |
| 1173 | { |
| 1174 | char uuid_s[LTTNG_UUID_STR_LEN], |
| 1175 | clock_uuid_s[LTTNG_UUID_STR_LEN]; |
| 1176 | int ret = 0; |
| 1177 | |
| 1178 | LTTNG_ASSERT(session); |
| 1179 | |
| 1180 | lttng_uuid_to_str(session->uuid, uuid_s); |
| 1181 | |
| 1182 | /* For crash ABI */ |
| 1183 | ret = lttng_metadata_printf(session, |
| 1184 | "/* CTF %u.%u */\n\n", |
| 1185 | CTF_SPEC_MAJOR, |
| 1186 | CTF_SPEC_MINOR); |
| 1187 | if (ret) { |
| 1188 | goto end; |
| 1189 | } |
| 1190 | |
| 1191 | ret = lttng_metadata_printf(session, |
| 1192 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" |
| 1193 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" |
| 1194 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" |
| 1195 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" |
| 1196 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" |
| 1197 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" |
| 1198 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" |
| 1199 | "\n" |
| 1200 | "trace {\n" |
| 1201 | " major = %u;\n" |
| 1202 | " minor = %u;\n" |
| 1203 | " uuid = \"%s\";\n" |
| 1204 | " byte_order = %s;\n" |
| 1205 | " packet.header := struct {\n" |
| 1206 | " uint32_t magic;\n" |
| 1207 | " uint8_t uuid[16];\n" |
| 1208 | " uint32_t stream_id;\n" |
| 1209 | " uint64_t stream_instance_id;\n" |
| 1210 | " };\n" |
| 1211 | "};\n\n", |
| 1212 | session->uint8_t_alignment, |
| 1213 | session->uint16_t_alignment, |
| 1214 | session->uint32_t_alignment, |
| 1215 | session->uint64_t_alignment, |
| 1216 | session->bits_per_long, |
| 1217 | session->long_alignment, |
| 1218 | CTF_SPEC_MAJOR, |
| 1219 | CTF_SPEC_MINOR, |
| 1220 | uuid_s, |
| 1221 | session->byte_order == BIG_ENDIAN ? "be" : "le" |
| 1222 | ); |
| 1223 | if (ret) { |
| 1224 | goto end; |
| 1225 | } |
| 1226 | |
| 1227 | ret = lttng_metadata_printf(session, |
| 1228 | "env {\n" |
| 1229 | " domain = \"ust\";\n" |
| 1230 | " tracer_name = \"lttng-ust\";\n" |
| 1231 | " tracer_major = %u;\n" |
| 1232 | " tracer_minor = %u;\n" |
| 1233 | " tracer_buffering_scheme = \"%s\";\n" |
| 1234 | " tracer_buffering_id = %u;\n" |
| 1235 | " architecture_bit_width = %u;\n", |
| 1236 | major, |
| 1237 | minor, |
| 1238 | app ? "pid" : "uid", |
| 1239 | app ? (int) app->pid : (int) session->tracing_uid, |
| 1240 | session->bits_per_long); |
| 1241 | if (ret) { |
| 1242 | goto end; |
| 1243 | } |
| 1244 | |
| 1245 | ret = print_metadata_session_information(session); |
| 1246 | if (ret) { |
| 1247 | goto end; |
| 1248 | } |
| 1249 | |
| 1250 | /* |
| 1251 | * If per-application registry, we can output extra information |
| 1252 | * about the application. |
| 1253 | */ |
| 1254 | ret = print_metadata_app_information(session, app); |
| 1255 | if (ret) { |
| 1256 | goto end; |
| 1257 | } |
| 1258 | |
| 1259 | ret = lttng_metadata_printf(session, |
| 1260 | "};\n\n" |
| 1261 | ); |
| 1262 | if (ret) { |
| 1263 | goto end; |
| 1264 | } |
| 1265 | |
| 1266 | ret = lttng_metadata_printf(session, |
| 1267 | "clock {\n" |
| 1268 | " name = \"%s\";\n", |
| 1269 | trace_clock_name() |
| 1270 | ); |
| 1271 | if (ret) { |
| 1272 | goto end; |
| 1273 | } |
| 1274 | |
| 1275 | if (!trace_clock_uuid(clock_uuid_s)) { |
| 1276 | ret = lttng_metadata_printf(session, |
| 1277 | " uuid = \"%s\";\n", |
| 1278 | clock_uuid_s |
| 1279 | ); |
| 1280 | if (ret) { |
| 1281 | goto end; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | ret = lttng_metadata_printf(session, |
| 1286 | " description = \"%s\";\n" |
| 1287 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" |
| 1288 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" |
| 1289 | " offset = %" PRId64 ";\n" |
| 1290 | "};\n\n", |
| 1291 | trace_clock_description(), |
| 1292 | trace_clock_freq(), |
| 1293 | measure_clock_offset() |
| 1294 | ); |
| 1295 | if (ret) { |
| 1296 | goto end; |
| 1297 | } |
| 1298 | |
| 1299 | ret = lttng_metadata_printf(session, |
| 1300 | "typealias integer {\n" |
| 1301 | " size = 27; align = 1; signed = false;\n" |
| 1302 | " map = clock.%s.value;\n" |
| 1303 | "} := uint27_clock_monotonic_t;\n" |
| 1304 | "\n" |
| 1305 | "typealias integer {\n" |
| 1306 | " size = 32; align = %u; signed = false;\n" |
| 1307 | " map = clock.%s.value;\n" |
| 1308 | "} := uint32_clock_monotonic_t;\n" |
| 1309 | "\n" |
| 1310 | "typealias integer {\n" |
| 1311 | " size = 64; align = %u; signed = false;\n" |
| 1312 | " map = clock.%s.value;\n" |
| 1313 | "} := uint64_clock_monotonic_t;\n\n", |
| 1314 | trace_clock_name(), |
| 1315 | session->uint32_t_alignment, |
| 1316 | trace_clock_name(), |
| 1317 | session->uint64_t_alignment, |
| 1318 | trace_clock_name() |
| 1319 | ); |
| 1320 | if (ret) { |
| 1321 | goto end; |
| 1322 | } |
| 1323 | |
| 1324 | ret = _lttng_stream_packet_context_declare(session); |
| 1325 | if (ret) { |
| 1326 | goto end; |
| 1327 | } |
| 1328 | |
| 1329 | ret = _lttng_event_header_declare(session); |
| 1330 | if (ret) { |
| 1331 | goto end; |
| 1332 | } |
| 1333 | |
| 1334 | end: |
| 1335 | return ret; |
| 1336 | } |