| 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 <inttypes.h> |
| 10 | #include <limits.h> |
| 11 | #include <stdarg.h> |
| 12 | #include <stdint.h> |
| 13 | #include <stdio.h> |
| 14 | #include <string.h> |
| 15 | #include <unistd.h> |
| 16 | #include <vector> |
| 17 | |
| 18 | #include <common/common.hpp> |
| 19 | #include <common/exception.hpp> |
| 20 | #include <common/time.hpp> |
| 21 | #include <common/uuid.hpp> |
| 22 | |
| 23 | #include "ust-app.hpp" |
| 24 | #include "ust-clock.hpp" |
| 25 | #include "ust-registry.hpp" |
| 26 | |
| 27 | static |
| 28 | int _lttng_field_statedump(ust_registry_session *session, |
| 29 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 30 | size_t *iter_field, size_t nesting); |
| 31 | |
| 32 | static inline |
| 33 | int get_count_order(unsigned int count) |
| 34 | { |
| 35 | int order; |
| 36 | |
| 37 | order = lttng_fls(count) - 1; |
| 38 | if (count & (count - 1)) { |
| 39 | order++; |
| 40 | } |
| 41 | LTTNG_ASSERT(order >= 0); |
| 42 | return order; |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * Returns offset where to write in metadata array, or negative error value on error. |
| 47 | */ |
| 48 | static |
| 49 | ssize_t metadata_reserve(ust_registry_session *session, size_t len) |
| 50 | { |
| 51 | size_t new_len = session->_metadata_len + len; |
| 52 | size_t new_alloc_len = new_len; |
| 53 | size_t old_alloc_len = session->_metadata_alloc_len; |
| 54 | ssize_t ret; |
| 55 | |
| 56 | if (new_alloc_len > (UINT32_MAX >> 1)) |
| 57 | return -EINVAL; |
| 58 | if ((old_alloc_len << 1) > (UINT32_MAX >> 1)) |
| 59 | return -EINVAL; |
| 60 | |
| 61 | if (new_alloc_len > old_alloc_len) { |
| 62 | char *newptr; |
| 63 | |
| 64 | new_alloc_len = |
| 65 | std::max<size_t>(1U << get_count_order(new_alloc_len), old_alloc_len << 1); |
| 66 | newptr = (char *) realloc(session->_metadata, new_alloc_len); |
| 67 | if (!newptr) |
| 68 | return -ENOMEM; |
| 69 | session->_metadata = newptr; |
| 70 | /* We zero directly the memory from start of allocation. */ |
| 71 | memset(&session->_metadata[old_alloc_len], 0, new_alloc_len - old_alloc_len); |
| 72 | session->_metadata_alloc_len = new_alloc_len; |
| 73 | } |
| 74 | ret = session->_metadata_len; |
| 75 | session->_metadata_len += len; |
| 76 | return ret; |
| 77 | } |
| 78 | |
| 79 | static |
| 80 | int metadata_file_append(ust_registry_session *session, |
| 81 | const char *str, size_t len) |
| 82 | { |
| 83 | ssize_t written; |
| 84 | |
| 85 | if (session->_metadata_fd < 0) { |
| 86 | return 0; |
| 87 | } |
| 88 | /* Write to metadata file */ |
| 89 | written = lttng_write(session->_metadata_fd, str, len); |
| 90 | if (written != len) { |
| 91 | return -1; |
| 92 | } |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * We have exclusive access to our metadata buffer (protected by the |
| 98 | * ust_lock), so we can do racy operations such as looking for |
| 99 | * remaining space left in packet and write, since mutual exclusion |
| 100 | * protects us from concurrent writes. |
| 101 | */ |
| 102 | static ATTR_FORMAT_PRINTF(2, 3) |
| 103 | int lttng_metadata_printf(ust_registry_session *session, |
| 104 | const char *fmt, ...) |
| 105 | { |
| 106 | char *str = NULL; |
| 107 | size_t len; |
| 108 | va_list ap; |
| 109 | ssize_t offset; |
| 110 | int ret; |
| 111 | |
| 112 | va_start(ap, fmt); |
| 113 | ret = vasprintf(&str, fmt, ap); |
| 114 | va_end(ap); |
| 115 | if (ret < 0) |
| 116 | return -ENOMEM; |
| 117 | |
| 118 | len = strlen(str); |
| 119 | offset = metadata_reserve(session, len); |
| 120 | if (offset < 0) { |
| 121 | ret = offset; |
| 122 | goto end; |
| 123 | } |
| 124 | memcpy(&session->_metadata[offset], str, len); |
| 125 | ret = metadata_file_append(session, str, len); |
| 126 | if (ret) { |
| 127 | PERROR("Error appending to metadata file"); |
| 128 | goto end; |
| 129 | } |
| 130 | DBG3("Append to metadata: \"%s\"", str); |
| 131 | ret = 0; |
| 132 | |
| 133 | end: |
| 134 | free(str); |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | static |
| 139 | int print_tabs(ust_registry_session *session, size_t nesting) |
| 140 | { |
| 141 | size_t i; |
| 142 | |
| 143 | for (i = 0; i < nesting; i++) { |
| 144 | int ret; |
| 145 | |
| 146 | ret = lttng_metadata_printf(session, " "); |
| 147 | if (ret) { |
| 148 | return ret; |
| 149 | } |
| 150 | } |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | static |
| 155 | void sanitize_ctf_identifier(char *out, const char *in) |
| 156 | { |
| 157 | size_t i; |
| 158 | |
| 159 | for (i = 0; i < LTTNG_UST_ABI_SYM_NAME_LEN; i++) { |
| 160 | switch (in[i]) { |
| 161 | case '.': |
| 162 | case '$': |
| 163 | case ':': |
| 164 | out[i] = '_'; |
| 165 | break; |
| 166 | default: |
| 167 | out[i] = in[i]; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | static |
| 173 | int print_escaped_ctf_string(ust_registry_session *session, const char *string) |
| 174 | { |
| 175 | int ret = 0; |
| 176 | size_t i; |
| 177 | char cur; |
| 178 | |
| 179 | i = 0; |
| 180 | cur = string[i]; |
| 181 | while (cur != '\0') { |
| 182 | switch (cur) { |
| 183 | case '\n': |
| 184 | ret = lttng_metadata_printf(session, "%s", "\\n"); |
| 185 | break; |
| 186 | case '\\': |
| 187 | case '"': |
| 188 | ret = lttng_metadata_printf(session, "%c", '\\'); |
| 189 | if (ret) { |
| 190 | goto error; |
| 191 | } |
| 192 | /* We still print the current char */ |
| 193 | /* Fallthrough */ |
| 194 | default: |
| 195 | ret = lttng_metadata_printf(session, "%c", cur); |
| 196 | break; |
| 197 | } |
| 198 | |
| 199 | if (ret) { |
| 200 | goto error; |
| 201 | } |
| 202 | |
| 203 | cur = string[++i]; |
| 204 | } |
| 205 | error: |
| 206 | return ret; |
| 207 | } |
| 208 | |
| 209 | /* Called with session registry mutex held. */ |
| 210 | static |
| 211 | int ust_metadata_enum_statedump(ust_registry_session *session, |
| 212 | const char *enum_name, |
| 213 | uint64_t enum_id, |
| 214 | const struct lttng_ust_ctl_integer_type *container_type, |
| 215 | const char *field_name, size_t *iter_field, size_t nesting) |
| 216 | { |
| 217 | struct ust_registry_enum *reg_enum; |
| 218 | const struct lttng_ust_ctl_enum_entry *entries; |
| 219 | size_t nr_entries; |
| 220 | int ret = 0; |
| 221 | size_t i; |
| 222 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
| 223 | |
| 224 | rcu_read_lock(); |
| 225 | reg_enum = ust_registry_lookup_enum_by_id(session, enum_name, enum_id); |
| 226 | rcu_read_unlock(); |
| 227 | /* reg_enum can still be used because session registry mutex is held. */ |
| 228 | if (!reg_enum) { |
| 229 | ret = -ENOENT; |
| 230 | goto end; |
| 231 | } |
| 232 | entries = reg_enum->entries; |
| 233 | nr_entries = reg_enum->nr_entries; |
| 234 | |
| 235 | ret = print_tabs(session, nesting); |
| 236 | if (ret) { |
| 237 | goto end; |
| 238 | } |
| 239 | ret = lttng_metadata_printf(session, |
| 240 | "enum : integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u; } {\n", |
| 241 | container_type->size, |
| 242 | container_type->alignment, |
| 243 | container_type->signedness, |
| 244 | (container_type->encoding == lttng_ust_ctl_encode_none) |
| 245 | ? "none" |
| 246 | : (container_type->encoding == lttng_ust_ctl_encode_UTF8) |
| 247 | ? "UTF8" |
| 248 | : "ASCII", |
| 249 | container_type->base); |
| 250 | if (ret) { |
| 251 | goto end; |
| 252 | } |
| 253 | nesting++; |
| 254 | /* Dump all entries */ |
| 255 | for (i = 0; i < nr_entries; i++) { |
| 256 | const struct lttng_ust_ctl_enum_entry *entry = &entries[i]; |
| 257 | int j, len; |
| 258 | |
| 259 | ret = print_tabs(session, nesting); |
| 260 | if (ret) { |
| 261 | goto end; |
| 262 | } |
| 263 | ret = lttng_metadata_printf(session, |
| 264 | "\""); |
| 265 | if (ret) { |
| 266 | goto end; |
| 267 | } |
| 268 | len = strlen(entry->string); |
| 269 | /* Escape the character '"' */ |
| 270 | for (j = 0; j < len; j++) { |
| 271 | char c = entry->string[j]; |
| 272 | |
| 273 | switch (c) { |
| 274 | case '"': |
| 275 | ret = lttng_metadata_printf(session, |
| 276 | "\\\""); |
| 277 | break; |
| 278 | case '\\': |
| 279 | ret = lttng_metadata_printf(session, |
| 280 | "\\\\"); |
| 281 | break; |
| 282 | default: |
| 283 | ret = lttng_metadata_printf(session, |
| 284 | "%c", c); |
| 285 | break; |
| 286 | } |
| 287 | if (ret) { |
| 288 | goto end; |
| 289 | } |
| 290 | } |
| 291 | ret = lttng_metadata_printf(session, "\""); |
| 292 | if (ret) { |
| 293 | goto end; |
| 294 | } |
| 295 | |
| 296 | if (entry->u.extra.options & |
| 297 | LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO) { |
| 298 | ret = lttng_metadata_printf(session, ",\n"); |
| 299 | if (ret) { |
| 300 | goto end; |
| 301 | } |
| 302 | } else { |
| 303 | ret = lttng_metadata_printf(session, |
| 304 | " = "); |
| 305 | if (ret) { |
| 306 | goto end; |
| 307 | } |
| 308 | |
| 309 | if (entry->start.signedness) { |
| 310 | ret = lttng_metadata_printf(session, |
| 311 | "%" PRId64, entry->start.value); |
| 312 | } else { |
| 313 | ret = lttng_metadata_printf(session, |
| 314 | "%" PRIu64, entry->start.value); |
| 315 | } |
| 316 | if (ret) { |
| 317 | goto end; |
| 318 | } |
| 319 | |
| 320 | if (entry->start.signedness == entry->end.signedness && |
| 321 | entry->start.value == |
| 322 | entry->end.value) { |
| 323 | ret = lttng_metadata_printf(session, ",\n"); |
| 324 | } else { |
| 325 | if (entry->end.signedness) { |
| 326 | ret = lttng_metadata_printf(session, |
| 327 | " ... %" PRId64 ",\n", |
| 328 | entry->end.value); |
| 329 | } else { |
| 330 | ret = lttng_metadata_printf(session, |
| 331 | " ... %" PRIu64 ",\n", |
| 332 | entry->end.value); |
| 333 | } |
| 334 | } |
| 335 | if (ret) { |
| 336 | goto end; |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | nesting--; |
| 341 | sanitize_ctf_identifier(identifier, field_name); |
| 342 | ret = print_tabs(session, nesting); |
| 343 | if (ret) { |
| 344 | goto end; |
| 345 | } |
| 346 | ret = lttng_metadata_printf(session, "} _%s;\n", |
| 347 | identifier); |
| 348 | end: |
| 349 | (*iter_field)++; |
| 350 | return ret; |
| 351 | } |
| 352 | |
| 353 | static |
| 354 | int _lttng_variant_statedump(ust_registry_session *session, |
| 355 | uint32_t nr_choices, const char *tag_name, |
| 356 | uint32_t alignment, |
| 357 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 358 | size_t *iter_field, size_t nesting) |
| 359 | { |
| 360 | const struct lttng_ust_ctl_field *variant = &fields[*iter_field]; |
| 361 | uint32_t i; |
| 362 | int ret; |
| 363 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
| 364 | |
| 365 | (*iter_field)++; |
| 366 | sanitize_ctf_identifier(identifier, tag_name); |
| 367 | if (alignment) { |
| 368 | ret = print_tabs(session, nesting); |
| 369 | if (ret) { |
| 370 | goto end; |
| 371 | } |
| 372 | ret = lttng_metadata_printf(session, |
| 373 | "struct { } align(%u) _%s_padding;\n", |
| 374 | alignment * CHAR_BIT, |
| 375 | variant->name); |
| 376 | if (ret) { |
| 377 | goto end; |
| 378 | } |
| 379 | } |
| 380 | ret = print_tabs(session, nesting); |
| 381 | if (ret) { |
| 382 | goto end; |
| 383 | } |
| 384 | ret = lttng_metadata_printf(session, |
| 385 | "variant <_%s> {\n", |
| 386 | identifier); |
| 387 | if (ret) { |
| 388 | goto end; |
| 389 | } |
| 390 | |
| 391 | for (i = 0; i < nr_choices; i++) { |
| 392 | if (*iter_field >= nr_fields) { |
| 393 | ret = -EOVERFLOW; |
| 394 | goto end; |
| 395 | } |
| 396 | ret = _lttng_field_statedump(session, |
| 397 | fields, nr_fields, |
| 398 | iter_field, nesting + 1); |
| 399 | if (ret) { |
| 400 | goto end; |
| 401 | } |
| 402 | } |
| 403 | sanitize_ctf_identifier(identifier, variant->name); |
| 404 | ret = print_tabs(session, nesting); |
| 405 | if (ret) { |
| 406 | goto end; |
| 407 | } |
| 408 | ret = lttng_metadata_printf(session, |
| 409 | "} _%s;\n", |
| 410 | identifier); |
| 411 | if (ret) { |
| 412 | goto end; |
| 413 | } |
| 414 | end: |
| 415 | return ret; |
| 416 | } |
| 417 | |
| 418 | static |
| 419 | int _lttng_field_statedump(ust_registry_session *session, |
| 420 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
| 421 | size_t *iter_field, size_t nesting) |
| 422 | { |
| 423 | int ret = 0; |
| 424 | const char *bo_be = " byte_order = be;"; |
| 425 | const char *bo_le = " byte_order = le;"; |
| 426 | const char *bo_native = ""; |
| 427 | const char *bo_reverse; |
| 428 | const struct lttng_ust_ctl_field *field; |
| 429 | |
| 430 | if (*iter_field >= nr_fields) { |
| 431 | ret = -EOVERFLOW; |
| 432 | goto end; |
| 433 | } |
| 434 | field = &fields[*iter_field]; |
| 435 | |
| 436 | if (session->_byte_order == BIG_ENDIAN) { |
| 437 | bo_reverse = bo_le; |
| 438 | } else { |
| 439 | bo_reverse = bo_be; |
| 440 | } |
| 441 | |
| 442 | switch (field->type.atype) { |
| 443 | case lttng_ust_ctl_atype_integer: |
| 444 | ret = print_tabs(session, nesting); |
| 445 | if (ret) { |
| 446 | goto end; |
| 447 | } |
| 448 | ret = lttng_metadata_printf(session, |
| 449 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", |
| 450 | field->type.u.integer.size, |
| 451 | field->type.u.integer.alignment, |
| 452 | field->type.u.integer.signedness, |
| 453 | (field->type.u.integer.encoding == lttng_ust_ctl_encode_none) |
| 454 | ? "none" |
| 455 | : (field->type.u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 456 | ? "UTF8" |
| 457 | : "ASCII", |
| 458 | field->type.u.integer.base, |
| 459 | field->type.u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 460 | field->name); |
| 461 | (*iter_field)++; |
| 462 | break; |
| 463 | case lttng_ust_ctl_atype_enum: |
| 464 | ret = ust_metadata_enum_statedump(session, |
| 465 | field->type.u.legacy.basic.enumeration.name, |
| 466 | field->type.u.legacy.basic.enumeration.id, |
| 467 | &field->type.u.legacy.basic.enumeration.container_type, |
| 468 | field->name, iter_field, nesting); |
| 469 | break; |
| 470 | case lttng_ust_ctl_atype_float: |
| 471 | ret = print_tabs(session, nesting); |
| 472 | if (ret) { |
| 473 | goto end; |
| 474 | } |
| 475 | ret = lttng_metadata_printf(session, |
| 476 | "floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", |
| 477 | field->type.u._float.exp_dig, |
| 478 | field->type.u._float.mant_dig, |
| 479 | field->type.u._float.alignment, |
| 480 | field->type.u._float.reverse_byte_order ? bo_reverse : bo_native, |
| 481 | field->name); |
| 482 | (*iter_field)++; |
| 483 | break; |
| 484 | case lttng_ust_ctl_atype_array: |
| 485 | { |
| 486 | const struct lttng_ust_ctl_basic_type *elem_type; |
| 487 | |
| 488 | ret = print_tabs(session, nesting); |
| 489 | if (ret) { |
| 490 | goto end; |
| 491 | } |
| 492 | elem_type = &field->type.u.legacy.array.elem_type; |
| 493 | /* Only integers are currently supported in arrays. */ |
| 494 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 495 | ret = -EINVAL; |
| 496 | goto end; |
| 497 | } |
| 498 | ret = lttng_metadata_printf(session, |
| 499 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
| 500 | elem_type->u.basic.integer.size, |
| 501 | elem_type->u.basic.integer.alignment, |
| 502 | elem_type->u.basic.integer.signedness, |
| 503 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 504 | ? "none" |
| 505 | : (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 506 | ? "UTF8" |
| 507 | : "ASCII", |
| 508 | elem_type->u.basic.integer.base, |
| 509 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 510 | field->name, field->type.u.legacy.array.length); |
| 511 | (*iter_field)++; |
| 512 | break; |
| 513 | } |
| 514 | case lttng_ust_ctl_atype_array_nestable: |
| 515 | { |
| 516 | uint32_t array_length; |
| 517 | const struct lttng_ust_ctl_field *array_nestable; |
| 518 | const struct lttng_ust_ctl_type *elem_type; |
| 519 | |
| 520 | array_length = field->type.u.array_nestable.length; |
| 521 | (*iter_field)++; |
| 522 | |
| 523 | if (*iter_field >= nr_fields) { |
| 524 | ret = -EOVERFLOW; |
| 525 | goto end; |
| 526 | } |
| 527 | array_nestable = &fields[*iter_field]; |
| 528 | elem_type = &array_nestable->type; |
| 529 | |
| 530 | /* Only integers are currently supported in arrays. */ |
| 531 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 532 | ret = -EINVAL; |
| 533 | goto end; |
| 534 | } |
| 535 | |
| 536 | if (field->type.u.array_nestable.alignment) { |
| 537 | ret = print_tabs(session, nesting); |
| 538 | if (ret) { |
| 539 | goto end; |
| 540 | } |
| 541 | ret = lttng_metadata_printf(session, |
| 542 | "struct { } align(%u) _%s_padding;\n", |
| 543 | field->type.u.array_nestable.alignment * CHAR_BIT, |
| 544 | field->name); |
| 545 | if (ret) { |
| 546 | goto end; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | ret = print_tabs(session, nesting); |
| 551 | if (ret) { |
| 552 | goto end; |
| 553 | } |
| 554 | ret = lttng_metadata_printf(session, |
| 555 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
| 556 | elem_type->u.integer.size, |
| 557 | elem_type->u.integer.alignment, |
| 558 | elem_type->u.integer.signedness, |
| 559 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
| 560 | ? "none" |
| 561 | : (elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 562 | ? "UTF8" |
| 563 | : "ASCII", |
| 564 | elem_type->u.integer.base, |
| 565 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 566 | field->name, array_length); |
| 567 | (*iter_field)++; |
| 568 | break; |
| 569 | } |
| 570 | case lttng_ust_ctl_atype_sequence: |
| 571 | { |
| 572 | const struct lttng_ust_ctl_basic_type *elem_type; |
| 573 | const struct lttng_ust_ctl_basic_type *length_type; |
| 574 | |
| 575 | elem_type = &field->type.u.legacy.sequence.elem_type; |
| 576 | length_type = &field->type.u.legacy.sequence.length_type; |
| 577 | ret = print_tabs(session, nesting); |
| 578 | if (ret) { |
| 579 | goto end; |
| 580 | } |
| 581 | |
| 582 | /* Only integers are currently supported in sequences. */ |
| 583 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 584 | ret = -EINVAL; |
| 585 | goto end; |
| 586 | } |
| 587 | |
| 588 | ret = lttng_metadata_printf(session, |
| 589 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", |
| 590 | length_type->u.basic.integer.size, |
| 591 | (unsigned int) length_type->u.basic.integer.alignment, |
| 592 | length_type->u.basic.integer.signedness, |
| 593 | (length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 594 | ? "none" |
| 595 | : ((length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 596 | ? "UTF8" |
| 597 | : "ASCII"), |
| 598 | length_type->u.basic.integer.base, |
| 599 | length_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 600 | field->name); |
| 601 | if (ret) { |
| 602 | goto end; |
| 603 | } |
| 604 | |
| 605 | ret = print_tabs(session, nesting); |
| 606 | if (ret) { |
| 607 | goto end; |
| 608 | } |
| 609 | ret = lttng_metadata_printf(session, |
| 610 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", |
| 611 | elem_type->u.basic.integer.size, |
| 612 | (unsigned int) elem_type->u.basic.integer.alignment, |
| 613 | elem_type->u.basic.integer.signedness, |
| 614 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
| 615 | ? "none" |
| 616 | : ((elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 617 | ? "UTF8" |
| 618 | : "ASCII"), |
| 619 | elem_type->u.basic.integer.base, |
| 620 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 621 | field->name, |
| 622 | field->name); |
| 623 | (*iter_field)++; |
| 624 | break; |
| 625 | } |
| 626 | case lttng_ust_ctl_atype_sequence_nestable: |
| 627 | { |
| 628 | const struct lttng_ust_ctl_field *sequence_nestable; |
| 629 | const struct lttng_ust_ctl_type *elem_type; |
| 630 | |
| 631 | (*iter_field)++; |
| 632 | if (*iter_field >= nr_fields) { |
| 633 | ret = -EOVERFLOW; |
| 634 | goto end; |
| 635 | } |
| 636 | sequence_nestable = &fields[*iter_field]; |
| 637 | elem_type = &sequence_nestable->type; |
| 638 | |
| 639 | /* Only integers are currently supported in sequences. */ |
| 640 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
| 641 | ret = -EINVAL; |
| 642 | goto end; |
| 643 | } |
| 644 | |
| 645 | if (field->type.u.sequence_nestable.alignment) { |
| 646 | ret = print_tabs(session, nesting); |
| 647 | if (ret) { |
| 648 | goto end; |
| 649 | } |
| 650 | ret = lttng_metadata_printf(session, |
| 651 | "struct { } align(%u) _%s_padding;\n", |
| 652 | field->type.u.sequence_nestable.alignment * CHAR_BIT, |
| 653 | field->name); |
| 654 | if (ret) { |
| 655 | goto end; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | ret = print_tabs(session, nesting); |
| 660 | if (ret) { |
| 661 | goto end; |
| 662 | } |
| 663 | ret = lttng_metadata_printf(session, |
| 664 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ _%s ];\n", |
| 665 | elem_type->u.integer.size, |
| 666 | (unsigned int) elem_type->u.integer.alignment, |
| 667 | elem_type->u.integer.signedness, |
| 668 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
| 669 | ? "none" |
| 670 | : ((elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
| 671 | ? "UTF8" |
| 672 | : "ASCII"), |
| 673 | elem_type->u.integer.base, |
| 674 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, |
| 675 | field->name, |
| 676 | field->type.u.sequence_nestable.length_name); |
| 677 | (*iter_field)++; |
| 678 | break; |
| 679 | } |
| 680 | case lttng_ust_ctl_atype_string: |
| 681 | /* Default encoding is UTF8 */ |
| 682 | ret = print_tabs(session, nesting); |
| 683 | if (ret) { |
| 684 | goto end; |
| 685 | } |
| 686 | ret = lttng_metadata_printf(session, |
| 687 | "string%s _%s;\n", |
| 688 | field->type.u.string.encoding == lttng_ust_ctl_encode_ASCII ? |
| 689 | " { encoding = ASCII; }" : "", |
| 690 | field->name); |
| 691 | (*iter_field)++; |
| 692 | break; |
| 693 | case lttng_ust_ctl_atype_variant: |
| 694 | ret = _lttng_variant_statedump(session, |
| 695 | field->type.u.legacy.variant.nr_choices, |
| 696 | field->type.u.legacy.variant.tag_name, |
| 697 | 0, |
| 698 | fields, nr_fields, iter_field, nesting); |
| 699 | if (ret) { |
| 700 | goto end; |
| 701 | } |
| 702 | break; |
| 703 | case lttng_ust_ctl_atype_variant_nestable: |
| 704 | ret = _lttng_variant_statedump(session, |
| 705 | field->type.u.variant_nestable.nr_choices, |
| 706 | field->type.u.variant_nestable.tag_name, |
| 707 | field->type.u.variant_nestable.alignment, |
| 708 | fields, nr_fields, iter_field, nesting); |
| 709 | if (ret) { |
| 710 | goto end; |
| 711 | } |
| 712 | break; |
| 713 | case lttng_ust_ctl_atype_struct: |
| 714 | if (field->type.u.legacy._struct.nr_fields != 0) { |
| 715 | /* Currently only 0-length structures are supported. */ |
| 716 | ret = -EINVAL; |
| 717 | goto end; |
| 718 | } |
| 719 | ret = print_tabs(session, nesting); |
| 720 | if (ret) { |
| 721 | goto end; |
| 722 | } |
| 723 | ret = lttng_metadata_printf(session, |
| 724 | "struct {} _%s;\n", |
| 725 | field->name); |
| 726 | (*iter_field)++; |
| 727 | break; |
| 728 | case lttng_ust_ctl_atype_struct_nestable: |
| 729 | if (field->type.u.struct_nestable.nr_fields != 0) { |
| 730 | /* Currently only 0-length structures are supported. */ |
| 731 | ret = -EINVAL; |
| 732 | goto end; |
| 733 | } |
| 734 | ret = print_tabs(session, nesting); |
| 735 | if (ret) { |
| 736 | goto end; |
| 737 | } |
| 738 | if (field->type.u.struct_nestable.alignment) { |
| 739 | ret = lttng_metadata_printf(session, |
| 740 | "struct {} align(%u) _%s;\n", |
| 741 | field->type.u.struct_nestable.alignment * CHAR_BIT, |
| 742 | field->name); |
| 743 | if (ret) { |
| 744 | goto end; |
| 745 | } |
| 746 | } else { |
| 747 | ret = lttng_metadata_printf(session, |
| 748 | "struct {} _%s;\n", |
| 749 | field->name); |
| 750 | } |
| 751 | (*iter_field)++; |
| 752 | break; |
| 753 | case lttng_ust_ctl_atype_enum_nestable: |
| 754 | { |
| 755 | const struct lttng_ust_ctl_field *container_field; |
| 756 | const struct lttng_ust_ctl_type *container_type; |
| 757 | |
| 758 | (*iter_field)++; |
| 759 | if (*iter_field >= nr_fields) { |
| 760 | ret = -EOVERFLOW; |
| 761 | goto end; |
| 762 | } |
| 763 | container_field = &fields[*iter_field]; |
| 764 | container_type = &container_field->type; |
| 765 | |
| 766 | /* Only integers are supported as container types. */ |
| 767 | if (container_type->atype != lttng_ust_ctl_atype_integer) { |
| 768 | ret = -EINVAL; |
| 769 | goto end; |
| 770 | } |
| 771 | ret = ust_metadata_enum_statedump(session, |
| 772 | field->type.u.enum_nestable.name, |
| 773 | field->type.u.enum_nestable.id, |
| 774 | &container_type->u.integer, |
| 775 | field->name, iter_field, nesting); |
| 776 | break; |
| 777 | } |
| 778 | default: |
| 779 | ret = -EINVAL; |
| 780 | } |
| 781 | end: |
| 782 | return ret; |
| 783 | } |
| 784 | |
| 785 | static |
| 786 | int _lttng_context_metadata_statedump(ust_registry_session *session, |
| 787 | size_t nr_ctx_fields, |
| 788 | struct lttng_ust_ctl_field *ctx) |
| 789 | { |
| 790 | int ret = 0; |
| 791 | size_t i = 0; |
| 792 | |
| 793 | if (!ctx) |
| 794 | return 0; |
| 795 | for (;;) { |
| 796 | if (i >= nr_ctx_fields) { |
| 797 | break; |
| 798 | } |
| 799 | ret = _lttng_field_statedump(session, ctx, |
| 800 | nr_ctx_fields, &i, 2); |
| 801 | if (ret) { |
| 802 | break; |
| 803 | } |
| 804 | } |
| 805 | return ret; |
| 806 | } |
| 807 | |
| 808 | static |
| 809 | int _lttng_fields_metadata_statedump(ust_registry_session *session, |
| 810 | struct ust_registry_event *event) |
| 811 | { |
| 812 | int ret = 0; |
| 813 | size_t i = 0; |
| 814 | |
| 815 | for (;;) { |
| 816 | if (i >= event->nr_fields) { |
| 817 | break; |
| 818 | } |
| 819 | ret = _lttng_field_statedump(session, event->fields, |
| 820 | event->nr_fields, &i, 2); |
| 821 | if (ret) { |
| 822 | break; |
| 823 | } |
| 824 | } |
| 825 | return ret; |
| 826 | } |
| 827 | |
| 828 | /* |
| 829 | * Should be called with session registry mutex held. |
| 830 | */ |
| 831 | int ust_metadata_event_statedump(ust_registry_session *session, |
| 832 | struct ust_registry_channel *chan, |
| 833 | struct ust_registry_event *event) |
| 834 | { |
| 835 | int ret = 0; |
| 836 | |
| 837 | /* Don't dump metadata events */ |
| 838 | if (chan->chan_id == -1U) |
| 839 | return 0; |
| 840 | |
| 841 | /* |
| 842 | * We don't want to output an event's metadata before its parent |
| 843 | * stream's metadata. If the stream's metadata hasn't been output yet, |
| 844 | * skip this event. Its metadata will be output when we output the |
| 845 | * stream's metadata. |
| 846 | */ |
| 847 | if (!chan->metadata_dumped || event->metadata_dumped) { |
| 848 | return 0; |
| 849 | } |
| 850 | |
| 851 | ret = lttng_metadata_printf(session, |
| 852 | "event {\n" |
| 853 | " name = \"%s\";\n" |
| 854 | " id = %u;\n" |
| 855 | " stream_id = %u;\n", |
| 856 | event->name, |
| 857 | event->id, |
| 858 | chan->chan_id); |
| 859 | if (ret) { |
| 860 | goto end; |
| 861 | } |
| 862 | |
| 863 | ret = lttng_metadata_printf(session, |
| 864 | " loglevel = %d;\n", |
| 865 | event->loglevel_value); |
| 866 | if (ret) { |
| 867 | goto end; |
| 868 | } |
| 869 | |
| 870 | if (event->model_emf_uri) { |
| 871 | ret = lttng_metadata_printf(session, |
| 872 | " model.emf.uri = \"%s\";\n", |
| 873 | event->model_emf_uri); |
| 874 | if (ret) { |
| 875 | goto end; |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | ret = lttng_metadata_printf(session, |
| 880 | " fields := struct {\n" |
| 881 | ); |
| 882 | if (ret) { |
| 883 | goto end; |
| 884 | } |
| 885 | |
| 886 | ret = _lttng_fields_metadata_statedump(session, event); |
| 887 | if (ret) { |
| 888 | goto end; |
| 889 | } |
| 890 | |
| 891 | ret = lttng_metadata_printf(session, |
| 892 | " };\n" |
| 893 | "};\n\n"); |
| 894 | if (ret) { |
| 895 | goto end; |
| 896 | } |
| 897 | event->metadata_dumped = 1; |
| 898 | |
| 899 | end: |
| 900 | return ret; |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * Should be called with session registry mutex held. |
| 905 | * |
| 906 | * RCU read lock must be held by the caller. |
| 907 | */ |
| 908 | int ust_metadata_channel_statedump(ust_registry_session *session, |
| 909 | struct ust_registry_channel *chan) |
| 910 | { |
| 911 | int ret; |
| 912 | |
| 913 | ASSERT_RCU_READ_LOCKED(); |
| 914 | |
| 915 | /* Don't dump metadata events */ |
| 916 | if (chan->chan_id == -1U) |
| 917 | return 0; |
| 918 | |
| 919 | if (!chan->header_type) |
| 920 | return -EINVAL; |
| 921 | |
| 922 | ret = lttng_metadata_printf(session, |
| 923 | "stream {\n" |
| 924 | " id = %u;\n" |
| 925 | " event.header := %s;\n" |
| 926 | " packet.context := struct packet_context;\n", |
| 927 | chan->chan_id, |
| 928 | chan->header_type == LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT ? |
| 929 | "struct event_header_compact" : |
| 930 | "struct event_header_large"); |
| 931 | if (ret) { |
| 932 | return ret; |
| 933 | } |
| 934 | |
| 935 | if (chan->ctx_fields) { |
| 936 | ret = lttng_metadata_printf(session, |
| 937 | " event.context := struct {\n"); |
| 938 | if (ret) { |
| 939 | return ret; |
| 940 | } |
| 941 | } |
| 942 | ret = _lttng_context_metadata_statedump(session, |
| 943 | chan->nr_ctx_fields, |
| 944 | chan->ctx_fields); |
| 945 | if (ret) { |
| 946 | return ret; |
| 947 | } |
| 948 | if (chan->ctx_fields) { |
| 949 | ret = lttng_metadata_printf(session, |
| 950 | " };\n"); |
| 951 | if (ret) { |
| 952 | return ret; |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | ret = lttng_metadata_printf(session, |
| 957 | "};\n\n"); |
| 958 | if (ret) { |
| 959 | return ret; |
| 960 | } |
| 961 | |
| 962 | /* Flag success of metadata dump. */ |
| 963 | chan->metadata_dumped = 1; |
| 964 | |
| 965 | /* |
| 966 | * Output the metadata of any existing event. |
| 967 | * |
| 968 | * Sort the events by id. This is not necessary, but it's nice to have |
| 969 | * a more predictable order in the metadata file. |
| 970 | */ |
| 971 | std::vector<ust_registry_event *> events; |
| 972 | { |
| 973 | cds_lfht_iter event_iter; |
| 974 | ust_registry_event *event; |
| 975 | cds_lfht_for_each_entry(chan->events->ht, &event_iter, event, |
| 976 | node.node) { |
| 977 | events.push_back(event); |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | std::sort(events.begin(), events.end(), |
| 982 | [] (ust_registry_event *a, ust_registry_event *b) { |
| 983 | return a->id < b->id; |
| 984 | }); |
| 985 | |
| 986 | for (ust_registry_event *event : events) { |
| 987 | ust_metadata_event_statedump(session, chan, event); |
| 988 | } |
| 989 | |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | static |
| 994 | int _lttng_stream_packet_context_declare(ust_registry_session *session) |
| 995 | { |
| 996 | return lttng_metadata_printf(session, |
| 997 | "struct packet_context {\n" |
| 998 | " uint64_clock_monotonic_t timestamp_begin;\n" |
| 999 | " uint64_clock_monotonic_t timestamp_end;\n" |
| 1000 | " uint64_t content_size;\n" |
| 1001 | " uint64_t packet_size;\n" |
| 1002 | " uint64_t packet_seq_num;\n" |
| 1003 | " unsigned long events_discarded;\n" |
| 1004 | " uint32_t cpu_id;\n" |
| 1005 | "};\n\n" |
| 1006 | ); |
| 1007 | } |
| 1008 | |
| 1009 | /* |
| 1010 | * Compact header: |
| 1011 | * id: range: 0 - 30. |
| 1012 | * id 31 is reserved to indicate an extended header. |
| 1013 | * |
| 1014 | * Large header: |
| 1015 | * id: range: 0 - 65534. |
| 1016 | * id 65535 is reserved to indicate an extended header. |
| 1017 | */ |
| 1018 | static |
| 1019 | int _lttng_event_header_declare(ust_registry_session *session) |
| 1020 | { |
| 1021 | return lttng_metadata_printf(session, |
| 1022 | "struct event_header_compact {\n" |
| 1023 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" |
| 1024 | " variant <id> {\n" |
| 1025 | " struct {\n" |
| 1026 | " uint27_clock_monotonic_t timestamp;\n" |
| 1027 | " } compact;\n" |
| 1028 | " struct {\n" |
| 1029 | " uint32_t id;\n" |
| 1030 | " uint64_clock_monotonic_t timestamp;\n" |
| 1031 | " } extended;\n" |
| 1032 | " } v;\n" |
| 1033 | "} align(%u);\n" |
| 1034 | "\n" |
| 1035 | "struct event_header_large {\n" |
| 1036 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" |
| 1037 | " variant <id> {\n" |
| 1038 | " struct {\n" |
| 1039 | " uint32_clock_monotonic_t timestamp;\n" |
| 1040 | " } compact;\n" |
| 1041 | " struct {\n" |
| 1042 | " uint32_t id;\n" |
| 1043 | " uint64_clock_monotonic_t timestamp;\n" |
| 1044 | " } extended;\n" |
| 1045 | " } v;\n" |
| 1046 | "} align(%u);\n\n", |
| 1047 | session->_uint32_t_alignment, |
| 1048 | session->_uint16_t_alignment |
| 1049 | ); |
| 1050 | } |
| 1051 | |
| 1052 | static |
| 1053 | int print_metadata_session_information(ust_registry_session *registry) |
| 1054 | { |
| 1055 | int ret; |
| 1056 | struct ltt_session *session = NULL; |
| 1057 | char creation_datetime[ISO8601_STR_LEN]; |
| 1058 | |
| 1059 | rcu_read_lock(); |
| 1060 | session = session_find_by_id(registry->_tracing_id); |
| 1061 | if (!session) { |
| 1062 | ret = -1; |
| 1063 | goto error; |
| 1064 | } |
| 1065 | |
| 1066 | /* Print the trace name */ |
| 1067 | ret = lttng_metadata_printf(registry, " trace_name = \""); |
| 1068 | if (ret) { |
| 1069 | goto error; |
| 1070 | } |
| 1071 | |
| 1072 | /* |
| 1073 | * This is necessary since the creation time is present in the session |
| 1074 | * name when it is generated. |
| 1075 | */ |
| 1076 | if (session->has_auto_generated_name) { |
| 1077 | ret = print_escaped_ctf_string(registry, DEFAULT_SESSION_NAME); |
| 1078 | } else { |
| 1079 | ret = print_escaped_ctf_string(registry, session->name); |
| 1080 | } |
| 1081 | if (ret) { |
| 1082 | goto error; |
| 1083 | } |
| 1084 | |
| 1085 | ret = lttng_metadata_printf(registry, "\";\n"); |
| 1086 | if (ret) { |
| 1087 | goto error; |
| 1088 | } |
| 1089 | |
| 1090 | /* Prepare creation time */ |
| 1091 | ret = time_to_iso8601_str(session->creation_time, creation_datetime, |
| 1092 | sizeof(creation_datetime)); |
| 1093 | if (ret) { |
| 1094 | goto error; |
| 1095 | } |
| 1096 | |
| 1097 | /* Output the reste of the information */ |
| 1098 | ret = lttng_metadata_printf(registry, |
| 1099 | " trace_creation_datetime = \"%s\";\n" |
| 1100 | " hostname = \"%s\";\n", |
| 1101 | creation_datetime, session->hostname); |
| 1102 | if (ret) { |
| 1103 | goto error; |
| 1104 | } |
| 1105 | |
| 1106 | error: |
| 1107 | if (session) { |
| 1108 | session_put(session); |
| 1109 | } |
| 1110 | rcu_read_unlock(); |
| 1111 | return ret; |
| 1112 | } |
| 1113 | |
| 1114 | static |
| 1115 | int print_metadata_app_information(ust_registry_session *registry) |
| 1116 | { |
| 1117 | if (registry->get_buffering_scheme() != LTTNG_BUFFER_PER_PID) { |
| 1118 | return 0; |
| 1119 | } |
| 1120 | |
| 1121 | const auto *per_pid_session = static_cast<const ust_registry_session_per_pid *>(registry); |
| 1122 | |
| 1123 | char datetime[ISO8601_STR_LEN]; |
| 1124 | int ret = time_to_iso8601_str( |
| 1125 | per_pid_session->_app_creation_time, datetime, sizeof(datetime)); |
| 1126 | if (ret) { |
| 1127 | return ret; |
| 1128 | } |
| 1129 | |
| 1130 | ret = lttng_metadata_printf(registry, |
| 1131 | " tracer_patchlevel = %u;\n" |
| 1132 | " vpid = %d;\n" |
| 1133 | " procname = \"%s\";\n" |
| 1134 | " vpid_datetime = \"%s\";\n", |
| 1135 | per_pid_session->_tracer_patch_level_version, (int) per_pid_session->_vpid, |
| 1136 | per_pid_session->_procname.c_str(), datetime); |
| 1137 | return ret; |
| 1138 | } |
| 1139 | |
| 1140 | /* |
| 1141 | * Should be called with session registry mutex held. |
| 1142 | */ |
| 1143 | int ust_metadata_session_statedump(ust_registry_session *session) |
| 1144 | { |
| 1145 | int ret = 0; |
| 1146 | char trace_uuid_str[LTTNG_UUID_STR_LEN]; |
| 1147 | |
| 1148 | LTTNG_ASSERT(session); |
| 1149 | |
| 1150 | lttng_uuid_to_str(session->_uuid, trace_uuid_str); |
| 1151 | |
| 1152 | /* For crash ABI */ |
| 1153 | ret = lttng_metadata_printf(session, |
| 1154 | "/* CTF %u.%u */\n\n", |
| 1155 | CTF_SPEC_MAJOR, |
| 1156 | CTF_SPEC_MINOR); |
| 1157 | if (ret) { |
| 1158 | goto end; |
| 1159 | } |
| 1160 | |
| 1161 | ret = lttng_metadata_printf(session, |
| 1162 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" |
| 1163 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" |
| 1164 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" |
| 1165 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" |
| 1166 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" |
| 1167 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" |
| 1168 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" |
| 1169 | "\n" |
| 1170 | "trace {\n" |
| 1171 | " major = %u;\n" |
| 1172 | " minor = %u;\n" |
| 1173 | " uuid = \"%s\";\n" |
| 1174 | " byte_order = %s;\n" |
| 1175 | " packet.header := struct {\n" |
| 1176 | " uint32_t magic;\n" |
| 1177 | " uint8_t uuid[16];\n" |
| 1178 | " uint32_t stream_id;\n" |
| 1179 | " uint64_t stream_instance_id;\n" |
| 1180 | " };\n" |
| 1181 | "};\n\n", |
| 1182 | session->_uint8_t_alignment, |
| 1183 | session->_uint16_t_alignment, |
| 1184 | session->_uint32_t_alignment, |
| 1185 | session->_uint64_t_alignment, |
| 1186 | session->_bits_per_long, |
| 1187 | session->_long_alignment, |
| 1188 | CTF_SPEC_MAJOR, |
| 1189 | CTF_SPEC_MINOR, |
| 1190 | trace_uuid_str, |
| 1191 | session->_byte_order == BIG_ENDIAN ? "be" : "le" |
| 1192 | ); |
| 1193 | if (ret) { |
| 1194 | goto end; |
| 1195 | } |
| 1196 | |
| 1197 | ret = lttng_metadata_printf(session, |
| 1198 | "env {\n" |
| 1199 | " domain = \"ust\";\n" |
| 1200 | " tracer_name = \"lttng-ust\";\n" |
| 1201 | " tracer_major = %u;\n" |
| 1202 | " tracer_minor = %u;\n" |
| 1203 | " tracer_buffering_scheme = \"%s\";\n" |
| 1204 | " tracer_buffering_id = %u;\n" |
| 1205 | " architecture_bit_width = %u;\n", |
| 1206 | session->_app_tracer_version_major, session->_app_tracer_version_minor, |
| 1207 | session->get_buffering_scheme() == LTTNG_BUFFER_PER_PID ? "pid" : "uid", |
| 1208 | session->get_buffering_scheme() == LTTNG_BUFFER_PER_PID ? |
| 1209 | (int) static_cast<ust_registry_session_per_pid *>(session)->_vpid : |
| 1210 | (int) static_cast<ust_registry_session_per_uid *>(session)->_tracing_uid, |
| 1211 | session->_bits_per_long); |
| 1212 | if (ret) { |
| 1213 | goto end; |
| 1214 | } |
| 1215 | |
| 1216 | ret = print_metadata_session_information(session); |
| 1217 | if (ret) { |
| 1218 | goto end; |
| 1219 | } |
| 1220 | |
| 1221 | /* |
| 1222 | * If per-application registry, we can output extra information |
| 1223 | * about the application. |
| 1224 | */ |
| 1225 | ret = print_metadata_app_information(session); |
| 1226 | if (ret) { |
| 1227 | goto end; |
| 1228 | } |
| 1229 | |
| 1230 | ret = lttng_metadata_printf(session, |
| 1231 | "};\n\n" |
| 1232 | ); |
| 1233 | if (ret) { |
| 1234 | goto end; |
| 1235 | } |
| 1236 | |
| 1237 | try { |
| 1238 | const lttng::ust::clock_attributes_sample clock; |
| 1239 | |
| 1240 | ret = lttng_metadata_printf(session, |
| 1241 | "clock {\n" |
| 1242 | " name = \"%s\";\n", |
| 1243 | clock._name.c_str()); |
| 1244 | if (ret) { |
| 1245 | goto end; |
| 1246 | } |
| 1247 | |
| 1248 | if (clock._uuid) { |
| 1249 | char clock_uuid_str[LTTNG_UUID_STR_LEN]; |
| 1250 | |
| 1251 | lttng_uuid_to_str(*clock._uuid, clock_uuid_str); |
| 1252 | ret = lttng_metadata_printf( |
| 1253 | session, " uuid = \"%s\";\n", clock_uuid_str); |
| 1254 | if (ret) { |
| 1255 | goto end; |
| 1256 | } |
| 1257 | } |
| 1258 | |
| 1259 | ret = lttng_metadata_printf(session, |
| 1260 | " description = \"%s\";\n" |
| 1261 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" |
| 1262 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" |
| 1263 | " offset = %" PRId64 ";\n" |
| 1264 | "};\n\n", |
| 1265 | clock._description.c_str(), clock._frequency, clock._offset); |
| 1266 | if (ret) { |
| 1267 | goto end; |
| 1268 | } |
| 1269 | |
| 1270 | ret = lttng_metadata_printf(session, |
| 1271 | "typealias integer {\n" |
| 1272 | " size = 27; align = 1; signed = false;\n" |
| 1273 | " map = clock.%s.value;\n" |
| 1274 | "} := uint27_clock_monotonic_t;\n" |
| 1275 | "\n" |
| 1276 | "typealias integer {\n" |
| 1277 | " size = 32; align = %u; signed = false;\n" |
| 1278 | " map = clock.%s.value;\n" |
| 1279 | "} := uint32_clock_monotonic_t;\n" |
| 1280 | "\n" |
| 1281 | "typealias integer {\n" |
| 1282 | " size = 64; align = %u; signed = false;\n" |
| 1283 | " map = clock.%s.value;\n" |
| 1284 | "} := uint64_clock_monotonic_t;\n\n", |
| 1285 | clock._name.c_str(), session->_uint32_t_alignment, |
| 1286 | clock._name.c_str(), session->_uint64_t_alignment, |
| 1287 | clock._name.c_str()); |
| 1288 | if (ret) { |
| 1289 | goto end; |
| 1290 | } |
| 1291 | } catch (const std::exception &ex) { |
| 1292 | ERR("Failed to serialize clock description: %s", ex.what()); |
| 1293 | ret = -1; |
| 1294 | goto end; |
| 1295 | } |
| 1296 | |
| 1297 | ret = _lttng_stream_packet_context_declare(session); |
| 1298 | if (ret) { |
| 1299 | goto end; |
| 1300 | } |
| 1301 | |
| 1302 | ret = _lttng_event_header_declare(session); |
| 1303 | if (ret) { |
| 1304 | goto end; |
| 1305 | } |
| 1306 | |
| 1307 | end: |
| 1308 | return ret; |
| 1309 | } |