| 1 | /* |
| 2 | * Copyright 2016-2017 - Philippe Proulx <pproulx@efficios.com> |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 5 | * of this software and associated documentation files (the "Software"), to deal |
| 6 | * in the Software without restriction, including without limitation the rights |
| 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 8 | * copies of the Software, and to permit persons to whom the Software is |
| 9 | * furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | */ |
| 14 | |
| 15 | #define BT_COMP_LOG_SELF_COMP (mdec->config.self_comp) |
| 16 | #define BT_LOG_OUTPUT_LEVEL (mdec->config.log_level) |
| 17 | #define BT_LOG_TAG "PLUGIN/CTF/META/DECODER" |
| 18 | #include "logging/comp-logging.h" |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <stdbool.h> |
| 22 | #include <stdint.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <inttypes.h> |
| 25 | #include "common/assert.h" |
| 26 | #include "common/uuid.h" |
| 27 | #include "compat/memstream.h" |
| 28 | #include <babeltrace2/babeltrace.h> |
| 29 | #include <glib.h> |
| 30 | #include <string.h> |
| 31 | |
| 32 | #include "ast.h" |
| 33 | #include "decoder.h" |
| 34 | #include "scanner.h" |
| 35 | #include "logging.h" |
| 36 | #include "parser-wrap.h" |
| 37 | |
| 38 | #define TSDL_MAGIC 0x75d11d57 |
| 39 | |
| 40 | struct ctf_metadata_decoder { |
| 41 | struct ctf_scanner *scanner; |
| 42 | GString *text; |
| 43 | struct ctf_visitor_generate_ir *visitor; |
| 44 | bt_uuid_t uuid; |
| 45 | bool is_uuid_set; |
| 46 | int bo; |
| 47 | struct ctf_metadata_decoder_config config; |
| 48 | struct meta_log_config log_cfg; |
| 49 | }; |
| 50 | |
| 51 | struct packet_header { |
| 52 | uint32_t magic; |
| 53 | bt_uuid_t uuid; |
| 54 | uint32_t checksum; |
| 55 | uint32_t content_size; |
| 56 | uint32_t packet_size; |
| 57 | uint8_t compression_scheme; |
| 58 | uint8_t encryption_scheme; |
| 59 | uint8_t checksum_scheme; |
| 60 | uint8_t major; |
| 61 | uint8_t minor; |
| 62 | } __attribute__((__packed__)); |
| 63 | |
| 64 | BT_HIDDEN |
| 65 | int ctf_metadata_decoder_packetized_file_stream_to_buf(FILE *fp, |
| 66 | char **buf, int byte_order, bool *is_uuid_set, |
| 67 | uint8_t *uuid, bt_logging_level log_level, |
| 68 | bt_self_component *self_comp); |
| 69 | |
| 70 | BT_HIDDEN |
| 71 | int ctf_metadata_decoder_is_packetized(FILE *fp, bool *is_packetized, |
| 72 | int *byte_order, bt_logging_level log_level, |
| 73 | bt_self_component *self_comp) |
| 74 | { |
| 75 | uint32_t magic; |
| 76 | size_t len; |
| 77 | int ret = 0; |
| 78 | |
| 79 | *is_packetized = false; |
| 80 | len = fread(&magic, sizeof(magic), 1, fp); |
| 81 | if (len != 1) { |
| 82 | BT_COMP_LOG_CUR_LVL(BT_LOG_INFO, log_level, self_comp, |
| 83 | "Cannot read first metadata packet header: assuming the stream is not packetized."); |
| 84 | ret = -1; |
| 85 | goto end; |
| 86 | } |
| 87 | |
| 88 | if (byte_order) { |
| 89 | if (magic == TSDL_MAGIC) { |
| 90 | *is_packetized = true; |
| 91 | *byte_order = BYTE_ORDER; |
| 92 | } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) { |
| 93 | *is_packetized = true; |
| 94 | *byte_order = BYTE_ORDER == BIG_ENDIAN ? |
| 95 | LITTLE_ENDIAN : BIG_ENDIAN; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | end: |
| 100 | rewind(fp); |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | BT_HIDDEN |
| 106 | struct ctf_metadata_decoder *ctf_metadata_decoder_create( |
| 107 | const struct ctf_metadata_decoder_config *config) |
| 108 | { |
| 109 | struct ctf_metadata_decoder *mdec = |
| 110 | g_new0(struct ctf_metadata_decoder, 1); |
| 111 | |
| 112 | BT_ASSERT(config); |
| 113 | BT_COMP_LOG_CUR_LVL(BT_LOG_DEBUG, config->log_level, config->self_comp, |
| 114 | "Creating CTF metadata decoder: " |
| 115 | "clock-class-offset-s=%" PRId64 ", " |
| 116 | "clock-class-offset-ns=%" PRId64, |
| 117 | config->clock_class_offset_s, config->clock_class_offset_ns); |
| 118 | |
| 119 | if (!mdec) { |
| 120 | BT_COMP_LOG_CUR_LVL(BT_LOG_ERROR, config->log_level, |
| 121 | config->self_comp, |
| 122 | "Failed to allocate one CTF metadata decoder."); |
| 123 | goto end; |
| 124 | } |
| 125 | |
| 126 | mdec->log_cfg.log_level = config->log_level; |
| 127 | mdec->log_cfg.self_comp = config->self_comp; |
| 128 | mdec->scanner = ctf_scanner_alloc(); |
| 129 | if (!mdec->scanner) { |
| 130 | BT_COMP_LOGE("Cannot allocate a metadata lexical scanner: " |
| 131 | "mdec-addr=%p", mdec); |
| 132 | goto error; |
| 133 | } |
| 134 | |
| 135 | mdec->text = g_string_new(NULL); |
| 136 | if (!mdec->text) { |
| 137 | BT_COMP_LOGE("Failed to allocate one GString: " |
| 138 | "mdec-addr=%p", mdec); |
| 139 | goto error; |
| 140 | } |
| 141 | |
| 142 | mdec->bo = -1; |
| 143 | mdec->config = *config; |
| 144 | mdec->visitor = ctf_visitor_generate_ir_create(config); |
| 145 | if (!mdec->visitor) { |
| 146 | BT_COMP_LOGE("Failed to create a CTF IR metadata AST visitor: " |
| 147 | "mdec-addr=%p", mdec); |
| 148 | goto error; |
| 149 | } |
| 150 | |
| 151 | BT_COMP_LOGD("Creating CTF metadata decoder: " |
| 152 | "clock-class-offset-s=%" PRId64 ", " |
| 153 | "clock-class-offset-ns=%" PRId64 ", addr=%p", |
| 154 | config->clock_class_offset_s, config->clock_class_offset_ns, |
| 155 | mdec); |
| 156 | goto end; |
| 157 | |
| 158 | error: |
| 159 | ctf_metadata_decoder_destroy(mdec); |
| 160 | mdec = NULL; |
| 161 | |
| 162 | end: |
| 163 | return mdec; |
| 164 | } |
| 165 | |
| 166 | BT_HIDDEN |
| 167 | void ctf_metadata_decoder_destroy(struct ctf_metadata_decoder *mdec) |
| 168 | { |
| 169 | if (!mdec) { |
| 170 | return; |
| 171 | } |
| 172 | |
| 173 | if (mdec->scanner) { |
| 174 | ctf_scanner_free(mdec->scanner); |
| 175 | } |
| 176 | |
| 177 | if (mdec->text) { |
| 178 | g_string_free(mdec->text, TRUE); |
| 179 | } |
| 180 | |
| 181 | BT_COMP_LOGD("Destroying CTF metadata decoder: addr=%p", mdec); |
| 182 | ctf_visitor_generate_ir_destroy(mdec->visitor); |
| 183 | g_free(mdec); |
| 184 | } |
| 185 | |
| 186 | BT_HIDDEN |
| 187 | enum ctf_metadata_decoder_status ctf_metadata_decoder_append_content( |
| 188 | struct ctf_metadata_decoder *mdec, FILE *fp) |
| 189 | { |
| 190 | enum ctf_metadata_decoder_status status = |
| 191 | CTF_METADATA_DECODER_STATUS_OK; |
| 192 | int ret; |
| 193 | char *buf = NULL; |
| 194 | bool close_fp = false; |
| 195 | long start_pos = -1; |
| 196 | bool is_packetized; |
| 197 | |
| 198 | BT_ASSERT(mdec); |
| 199 | ret = ctf_metadata_decoder_is_packetized(fp, &is_packetized, &mdec->bo, |
| 200 | mdec->config.log_level, mdec->config.self_comp); |
| 201 | if (ret) { |
| 202 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 203 | goto end; |
| 204 | } |
| 205 | |
| 206 | if (is_packetized) { |
| 207 | BT_COMP_LOGI("Metadata stream is packetized: mdec-addr=%p", mdec); |
| 208 | ret = ctf_metadata_decoder_packetized_file_stream_to_buf(fp, |
| 209 | &buf, mdec->bo, &mdec->is_uuid_set, |
| 210 | mdec->uuid, mdec->config.log_level, |
| 211 | mdec->config.self_comp); |
| 212 | if (ret) { |
| 213 | BT_COMP_LOGE("Cannot decode packetized metadata packets to metadata text: " |
| 214 | "mdec-addr=%p, ret=%d", mdec, ret); |
| 215 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 216 | goto end; |
| 217 | } |
| 218 | |
| 219 | if (strlen(buf) == 0) { |
| 220 | /* An empty metadata packet is OK. */ |
| 221 | goto end; |
| 222 | } |
| 223 | |
| 224 | /* Convert the real file pointer to a memory file pointer */ |
| 225 | fp = bt_fmemopen(buf, strlen(buf), "rb"); |
| 226 | close_fp = true; |
| 227 | if (!fp) { |
| 228 | BT_COMP_LOGE("Cannot memory-open metadata buffer: %s: " |
| 229 | "mdec-addr=%p", strerror(errno), mdec); |
| 230 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 231 | goto end; |
| 232 | } |
| 233 | } else { |
| 234 | unsigned int major, minor; |
| 235 | ssize_t nr_items; |
| 236 | const long init_pos = ftell(fp); |
| 237 | |
| 238 | BT_COMP_LOGI("Metadata stream is plain text: mdec-addr=%p", mdec); |
| 239 | |
| 240 | if (init_pos < 0) { |
| 241 | BT_COMP_LOGE_ERRNO("Failed to get current file position", "."); |
| 242 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 243 | goto end; |
| 244 | } |
| 245 | |
| 246 | /* Check text-only metadata header and version */ |
| 247 | nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor); |
| 248 | if (nr_items < 2) { |
| 249 | BT_COMP_LOGW("Missing \"/* CTF major.minor\" signature in plain text metadata file stream: " |
| 250 | "mdec-addr=%p", mdec); |
| 251 | } |
| 252 | |
| 253 | BT_COMP_LOGI("Found metadata stream version in signature: version=%u.%u", major, minor); |
| 254 | |
| 255 | if (!ctf_metadata_decoder_is_packet_version_valid(major, |
| 256 | minor)) { |
| 257 | BT_COMP_LOGE("Invalid metadata version found in plain text signature: " |
| 258 | "version=%u.%u, mdec-addr=%p", major, minor, |
| 259 | mdec); |
| 260 | status = CTF_METADATA_DECODER_STATUS_INVAL_VERSION; |
| 261 | goto end; |
| 262 | } |
| 263 | |
| 264 | if (fseek(fp, init_pos, SEEK_SET)) { |
| 265 | BT_COMP_LOGE("Cannot seek metadata file stream to initial position: %s: " |
| 266 | "mdec-addr=%p", strerror(errno), mdec); |
| 267 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 268 | goto end; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | #if YYDEBUG |
| 273 | if (BT_LOG_ON_TRACE) { |
| 274 | yydebug = 1; |
| 275 | } |
| 276 | #endif |
| 277 | |
| 278 | /* Save the file's position: we'll seek back to append the plain text */ |
| 279 | BT_ASSERT(fp); |
| 280 | |
| 281 | if (mdec->config.keep_plain_text) { |
| 282 | start_pos = ftell(fp); |
| 283 | } |
| 284 | |
| 285 | /* Append the metadata text content */ |
| 286 | ret = ctf_scanner_append_ast(mdec->scanner, fp); |
| 287 | if (ret) { |
| 288 | BT_COMP_LOGE("Cannot create the metadata AST out of the metadata text: " |
| 289 | "mdec-addr=%p", mdec); |
| 290 | status = CTF_METADATA_DECODER_STATUS_INCOMPLETE; |
| 291 | goto end; |
| 292 | } |
| 293 | |
| 294 | /* We know it's complete: append plain text */ |
| 295 | if (mdec->config.keep_plain_text) { |
| 296 | BT_ASSERT(start_pos != -1); |
| 297 | ret = fseek(fp, start_pos, SEEK_SET); |
| 298 | if (ret) { |
| 299 | BT_COMP_LOGE("Failed to seek file: ret=%d, mdec-addr=%p", |
| 300 | ret, mdec); |
| 301 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 302 | goto end; |
| 303 | } |
| 304 | |
| 305 | ret = bt_common_append_file_content_to_g_string(mdec->text, fp); |
| 306 | if (ret) { |
| 307 | BT_COMP_LOGE("Failed to append to current plain text: " |
| 308 | "ret=%d, mdec-addr=%p", ret, mdec); |
| 309 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 310 | goto end; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | ret = ctf_visitor_semantic_check(0, &mdec->scanner->ast->root, |
| 315 | &mdec->log_cfg); |
| 316 | if (ret) { |
| 317 | BT_COMP_LOGE("Validation of the metadata semantics failed: " |
| 318 | "mdec-addr=%p", mdec); |
| 319 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 320 | goto end; |
| 321 | } |
| 322 | |
| 323 | if (mdec->config.create_trace_class) { |
| 324 | ret = ctf_visitor_generate_ir_visit_node(mdec->visitor, |
| 325 | &mdec->scanner->ast->root); |
| 326 | switch (ret) { |
| 327 | case 0: |
| 328 | /* Success */ |
| 329 | break; |
| 330 | case -EINCOMPLETE: |
| 331 | BT_COMP_LOGD("While visiting metadata AST: incomplete data: " |
| 332 | "mdec-addr=%p", mdec); |
| 333 | status = CTF_METADATA_DECODER_STATUS_INCOMPLETE; |
| 334 | goto end; |
| 335 | default: |
| 336 | BT_COMP_LOGE("Failed to visit AST node to create CTF IR objects: " |
| 337 | "mdec-addr=%p, ret=%d", mdec, ret); |
| 338 | status = CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR; |
| 339 | goto end; |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | end: |
| 344 | #if YYDEBUG |
| 345 | yydebug = 0; |
| 346 | #endif |
| 347 | |
| 348 | if (fp && close_fp) { |
| 349 | if (fclose(fp)) { |
| 350 | BT_COMP_LOGE("Cannot close metadata file stream: " |
| 351 | "mdec-addr=%p", mdec); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | free(buf); |
| 356 | |
| 357 | return status; |
| 358 | } |
| 359 | |
| 360 | BT_HIDDEN |
| 361 | bt_trace_class *ctf_metadata_decoder_get_ir_trace_class( |
| 362 | struct ctf_metadata_decoder *mdec) |
| 363 | { |
| 364 | BT_ASSERT_DBG(mdec); |
| 365 | BT_ASSERT_DBG(mdec->config.create_trace_class); |
| 366 | return ctf_visitor_generate_ir_get_ir_trace_class(mdec->visitor); |
| 367 | } |
| 368 | |
| 369 | BT_HIDDEN |
| 370 | struct ctf_trace_class *ctf_metadata_decoder_borrow_ctf_trace_class( |
| 371 | struct ctf_metadata_decoder *mdec) |
| 372 | { |
| 373 | BT_ASSERT_DBG(mdec); |
| 374 | BT_ASSERT_DBG(mdec->config.create_trace_class); |
| 375 | return ctf_visitor_generate_ir_borrow_ctf_trace_class(mdec->visitor); |
| 376 | } |
| 377 | |
| 378 | BT_HIDDEN |
| 379 | const char *ctf_metadata_decoder_get_text(struct ctf_metadata_decoder *mdec) |
| 380 | { |
| 381 | BT_ASSERT_DBG(mdec); |
| 382 | BT_ASSERT_DBG(mdec->config.keep_plain_text); |
| 383 | return mdec->text->str; |
| 384 | } |
| 385 | |
| 386 | BT_HIDDEN |
| 387 | int ctf_metadata_decoder_get_byte_order(struct ctf_metadata_decoder *mdec) |
| 388 | { |
| 389 | BT_ASSERT_DBG(mdec); |
| 390 | return mdec->bo; |
| 391 | } |
| 392 | |
| 393 | BT_HIDDEN |
| 394 | int ctf_metadata_decoder_get_uuid(struct ctf_metadata_decoder *mdec, |
| 395 | bt_uuid_t uuid) |
| 396 | { |
| 397 | int ret = 0; |
| 398 | |
| 399 | BT_ASSERT_DBG(mdec); |
| 400 | |
| 401 | if (!mdec->is_uuid_set) { |
| 402 | ret = -1; |
| 403 | goto end; |
| 404 | } |
| 405 | |
| 406 | bt_uuid_copy(uuid, mdec->uuid); |
| 407 | |
| 408 | end: |
| 409 | return ret; |
| 410 | } |
| 411 | |
| 412 | static |
| 413 | enum ctf_metadata_decoder_status find_uuid_in_trace_decl( |
| 414 | struct ctf_metadata_decoder *mdec, struct ctf_node *trace_node, |
| 415 | bt_uuid_t uuid) |
| 416 | { |
| 417 | enum ctf_metadata_decoder_status status = |
| 418 | CTF_METADATA_DECODER_STATUS_OK; |
| 419 | struct ctf_node *entry_node; |
| 420 | struct bt_list_head *decl_list = &trace_node->u.trace.declaration_list; |
| 421 | char *left = NULL; |
| 422 | |
| 423 | bt_list_for_each_entry(entry_node, decl_list, siblings) { |
| 424 | if (entry_node->type == NODE_CTF_EXPRESSION) { |
| 425 | int ret; |
| 426 | |
| 427 | left = ctf_ast_concatenate_unary_strings( |
| 428 | &entry_node->u.ctf_expression.left); |
| 429 | if (!left) { |
| 430 | BT_COMP_LOGE("Cannot concatenate unary strings."); |
| 431 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 432 | goto end; |
| 433 | } |
| 434 | |
| 435 | if (strcmp(left, "uuid") == 0) { |
| 436 | ret = ctf_ast_get_unary_uuid( |
| 437 | &entry_node->u.ctf_expression.right, |
| 438 | uuid, mdec->config.log_level, |
| 439 | mdec->config.self_comp); |
| 440 | if (ret) { |
| 441 | BT_COMP_LOGE("Invalid trace's `uuid` attribute."); |
| 442 | status = CTF_METADATA_DECODER_STATUS_ERROR; |
| 443 | goto end; |
| 444 | } |
| 445 | |
| 446 | goto end; |
| 447 | } |
| 448 | |
| 449 | g_free(left); |
| 450 | left = NULL; |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | status = CTF_METADATA_DECODER_STATUS_NONE; |
| 455 | |
| 456 | end: |
| 457 | g_free(left); |
| 458 | return status; |
| 459 | } |
| 460 | |
| 461 | BT_HIDDEN |
| 462 | enum ctf_metadata_decoder_status ctf_metadata_decoder_get_trace_class_uuid( |
| 463 | struct ctf_metadata_decoder *mdec, bt_uuid_t uuid) |
| 464 | { |
| 465 | enum ctf_metadata_decoder_status status = |
| 466 | CTF_METADATA_DECODER_STATUS_INCOMPLETE; |
| 467 | struct ctf_node *root_node = &mdec->scanner->ast->root; |
| 468 | struct ctf_node *trace_node; |
| 469 | |
| 470 | if (!root_node) { |
| 471 | status = CTF_METADATA_DECODER_STATUS_INCOMPLETE; |
| 472 | goto end; |
| 473 | } |
| 474 | |
| 475 | trace_node = |
| 476 | bt_list_entry(root_node->u.root.trace.next, |
| 477 | struct ctf_node, siblings); |
| 478 | if (!trace_node) { |
| 479 | status = CTF_METADATA_DECODER_STATUS_INCOMPLETE; |
| 480 | goto end; |
| 481 | } |
| 482 | |
| 483 | status = find_uuid_in_trace_decl(mdec, trace_node, uuid); |
| 484 | |
| 485 | end: |
| 486 | return status; |
| 487 | } |