| 1 | /* |
| 2 | * Babeltrace - Debug Information State Tracker |
| 3 | * |
| 4 | * Copyright (c) 2015 EfficiOS Inc. and Linux Foundation |
| 5 | * Copyright (c) 2015 Philippe Proulx <pproulx@efficios.com> |
| 6 | * Copyright (c) 2015 Antoine Busque <abusque@efficios.com> |
| 7 | * Copyright (c) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 10 | * of this software and associated documentation files (the "Software"), to deal |
| 11 | * in the Software without restriction, including without limitation the rights |
| 12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 13 | * copies of the Software, and to permit persons to whom the Software is |
| 14 | * furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice shall be included in |
| 17 | * all copies or substantial portions of the Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 25 | * SOFTWARE. |
| 26 | */ |
| 27 | |
| 28 | #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-UTILS-DEBUG-INFO-FLT" |
| 29 | #include "logging.h" |
| 30 | |
| 31 | #include <assert.h> |
| 32 | #include <glib.h> |
| 33 | #include "debug-info.h" |
| 34 | #include "bin-info.h" |
| 35 | #include "utils.h" |
| 36 | #include "copy.h" |
| 37 | |
| 38 | struct proc_debug_info_sources { |
| 39 | /* |
| 40 | * Hash table: base address (pointer to uint64_t) to bin info; owned by |
| 41 | * proc_debug_info_sources. |
| 42 | */ |
| 43 | GHashTable *baddr_to_bin_info; |
| 44 | |
| 45 | /* |
| 46 | * Hash table: IP (pointer to uint64_t) to (struct debug_info_source *); |
| 47 | * owned by proc_debug_info_sources. |
| 48 | */ |
| 49 | GHashTable *ip_to_debug_info_src; |
| 50 | }; |
| 51 | |
| 52 | struct debug_info { |
| 53 | struct debug_info_component *comp; |
| 54 | |
| 55 | /* |
| 56 | * Hash table of VPIDs (pointer to int64_t) to |
| 57 | * (struct ctf_proc_debug_infos*); owned by debug_info. |
| 58 | */ |
| 59 | GHashTable *vpid_to_proc_dbg_info_src; |
| 60 | GQuark q_statedump_bin_info; |
| 61 | GQuark q_statedump_debug_link; |
| 62 | GQuark q_statedump_build_id; |
| 63 | GQuark q_statedump_start; |
| 64 | GQuark q_dl_open; |
| 65 | GQuark q_lib_load; |
| 66 | GQuark q_lib_unload; |
| 67 | }; |
| 68 | |
| 69 | static |
| 70 | int debug_info_init(struct debug_info *info) |
| 71 | { |
| 72 | info->q_statedump_bin_info = g_quark_from_string( |
| 73 | "lttng_ust_statedump:bin_info"); |
| 74 | info->q_statedump_debug_link = g_quark_from_string( |
| 75 | "lttng_ust_statedump:debug_link)"); |
| 76 | info->q_statedump_build_id = g_quark_from_string( |
| 77 | "lttng_ust_statedump:build_id"); |
| 78 | info->q_statedump_start = g_quark_from_string( |
| 79 | "lttng_ust_statedump:start"); |
| 80 | info->q_dl_open = g_quark_from_string("lttng_ust_dl:dlopen"); |
| 81 | info->q_lib_load = g_quark_from_string("lttng_ust_lib:load"); |
| 82 | info->q_lib_unload = g_quark_from_string("lttng_ust_lib:unload"); |
| 83 | |
| 84 | return bin_info_init(); |
| 85 | } |
| 86 | |
| 87 | static |
| 88 | void debug_info_source_destroy(struct debug_info_source *debug_info_src) |
| 89 | { |
| 90 | if (!debug_info_src) { |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | free(debug_info_src->func); |
| 95 | free(debug_info_src->src_path); |
| 96 | free(debug_info_src->bin_path); |
| 97 | free(debug_info_src->bin_loc); |
| 98 | g_free(debug_info_src); |
| 99 | } |
| 100 | |
| 101 | static |
| 102 | struct debug_info_source *debug_info_source_create_from_bin(struct bin_info *bin, |
| 103 | uint64_t ip) |
| 104 | { |
| 105 | int ret; |
| 106 | struct debug_info_source *debug_info_src = NULL; |
| 107 | struct source_location *src_loc = NULL; |
| 108 | |
| 109 | debug_info_src = g_new0(struct debug_info_source, 1); |
| 110 | |
| 111 | if (!debug_info_src) { |
| 112 | goto end; |
| 113 | } |
| 114 | |
| 115 | /* Lookup function name */ |
| 116 | ret = bin_info_lookup_function_name(bin, ip, &debug_info_src->func); |
| 117 | if (ret) { |
| 118 | goto error; |
| 119 | } |
| 120 | |
| 121 | /* Can't retrieve src_loc from ELF, or could not find binary, skip. */ |
| 122 | if (!bin->is_elf_only || !debug_info_src->func) { |
| 123 | /* Lookup source location */ |
| 124 | ret = bin_info_lookup_source_location(bin, ip, &src_loc); |
| 125 | BT_LOGD("Failed to lookup source location: ret=%d", ret); |
| 126 | } |
| 127 | |
| 128 | if (src_loc) { |
| 129 | debug_info_src->line_no = src_loc->line_no; |
| 130 | |
| 131 | if (src_loc->filename) { |
| 132 | debug_info_src->src_path = strdup(src_loc->filename); |
| 133 | if (!debug_info_src->src_path) { |
| 134 | goto error; |
| 135 | } |
| 136 | |
| 137 | debug_info_src->short_src_path = get_filename_from_path( |
| 138 | debug_info_src->src_path); |
| 139 | } |
| 140 | |
| 141 | source_location_destroy(src_loc); |
| 142 | } |
| 143 | |
| 144 | if (bin->elf_path) { |
| 145 | debug_info_src->bin_path = strdup(bin->elf_path); |
| 146 | if (!debug_info_src->bin_path) { |
| 147 | goto error; |
| 148 | } |
| 149 | |
| 150 | debug_info_src->short_bin_path = get_filename_from_path( |
| 151 | debug_info_src->bin_path); |
| 152 | |
| 153 | ret = bin_info_get_bin_loc(bin, ip, &(debug_info_src->bin_loc)); |
| 154 | if (ret) { |
| 155 | goto error; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | end: |
| 160 | return debug_info_src; |
| 161 | |
| 162 | error: |
| 163 | debug_info_source_destroy(debug_info_src); |
| 164 | return NULL; |
| 165 | } |
| 166 | |
| 167 | static |
| 168 | void proc_debug_info_sources_destroy( |
| 169 | struct proc_debug_info_sources *proc_dbg_info_src) |
| 170 | { |
| 171 | if (!proc_dbg_info_src) { |
| 172 | return; |
| 173 | } |
| 174 | |
| 175 | if (proc_dbg_info_src->baddr_to_bin_info) { |
| 176 | g_hash_table_destroy(proc_dbg_info_src->baddr_to_bin_info); |
| 177 | } |
| 178 | |
| 179 | if (proc_dbg_info_src->ip_to_debug_info_src) { |
| 180 | g_hash_table_destroy(proc_dbg_info_src->ip_to_debug_info_src); |
| 181 | } |
| 182 | |
| 183 | g_free(proc_dbg_info_src); |
| 184 | } |
| 185 | |
| 186 | static |
| 187 | struct proc_debug_info_sources *proc_debug_info_sources_create(void) |
| 188 | { |
| 189 | struct proc_debug_info_sources *proc_dbg_info_src = NULL; |
| 190 | |
| 191 | proc_dbg_info_src = g_new0(struct proc_debug_info_sources, 1); |
| 192 | if (!proc_dbg_info_src) { |
| 193 | goto end; |
| 194 | } |
| 195 | |
| 196 | proc_dbg_info_src->baddr_to_bin_info = g_hash_table_new_full( |
| 197 | g_int64_hash, g_int64_equal, (GDestroyNotify) g_free, |
| 198 | (GDestroyNotify) bin_info_destroy); |
| 199 | if (!proc_dbg_info_src->baddr_to_bin_info) { |
| 200 | goto error; |
| 201 | } |
| 202 | |
| 203 | proc_dbg_info_src->ip_to_debug_info_src = g_hash_table_new_full( |
| 204 | g_int64_hash, g_int64_equal, (GDestroyNotify) g_free, |
| 205 | (GDestroyNotify) debug_info_source_destroy); |
| 206 | if (!proc_dbg_info_src->ip_to_debug_info_src) { |
| 207 | goto error; |
| 208 | } |
| 209 | |
| 210 | end: |
| 211 | return proc_dbg_info_src; |
| 212 | |
| 213 | error: |
| 214 | proc_debug_info_sources_destroy(proc_dbg_info_src); |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | static |
| 219 | struct proc_debug_info_sources *proc_debug_info_sources_ht_get_entry( |
| 220 | GHashTable *ht, int64_t vpid) |
| 221 | { |
| 222 | gpointer key = g_new0(int64_t, 1); |
| 223 | struct proc_debug_info_sources *proc_dbg_info_src = NULL; |
| 224 | |
| 225 | if (!key) { |
| 226 | goto end; |
| 227 | } |
| 228 | |
| 229 | *((int64_t *) key) = vpid; |
| 230 | |
| 231 | /* Exists? Return it */ |
| 232 | proc_dbg_info_src = g_hash_table_lookup(ht, key); |
| 233 | if (proc_dbg_info_src) { |
| 234 | goto end; |
| 235 | } |
| 236 | |
| 237 | /* Otherwise, create and return it */ |
| 238 | proc_dbg_info_src = proc_debug_info_sources_create(); |
| 239 | if (!proc_dbg_info_src) { |
| 240 | goto end; |
| 241 | } |
| 242 | |
| 243 | g_hash_table_insert(ht, key, proc_dbg_info_src); |
| 244 | /* Ownership passed to ht */ |
| 245 | key = NULL; |
| 246 | end: |
| 247 | g_free(key); |
| 248 | return proc_dbg_info_src; |
| 249 | } |
| 250 | |
| 251 | static |
| 252 | struct debug_info_source *proc_debug_info_sources_get_entry( |
| 253 | struct proc_debug_info_sources *proc_dbg_info_src, uint64_t ip) |
| 254 | { |
| 255 | struct debug_info_source *debug_info_src = NULL; |
| 256 | gpointer key = g_new0(uint64_t, 1); |
| 257 | GHashTableIter iter; |
| 258 | gpointer baddr, value; |
| 259 | |
| 260 | if (!key) { |
| 261 | goto end; |
| 262 | } |
| 263 | |
| 264 | *((uint64_t *) key) = ip; |
| 265 | |
| 266 | /* Look in IP to debug infos hash table first. */ |
| 267 | debug_info_src = g_hash_table_lookup( |
| 268 | proc_dbg_info_src->ip_to_debug_info_src, |
| 269 | key); |
| 270 | if (debug_info_src) { |
| 271 | goto end; |
| 272 | } |
| 273 | |
| 274 | /* Check in all bin_infos. */ |
| 275 | g_hash_table_iter_init(&iter, proc_dbg_info_src->baddr_to_bin_info); |
| 276 | |
| 277 | while (g_hash_table_iter_next(&iter, &baddr, &value)) |
| 278 | { |
| 279 | struct bin_info *bin = value; |
| 280 | |
| 281 | if (!bin_info_has_address(value, ip)) { |
| 282 | continue; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * Found; add it to cache. |
| 287 | * |
| 288 | * FIXME: this should be bounded in size (and implement |
| 289 | * a caching policy), and entries should be prunned when |
| 290 | * libraries are unmapped. |
| 291 | */ |
| 292 | debug_info_src = debug_info_source_create_from_bin(bin, ip); |
| 293 | if (debug_info_src) { |
| 294 | g_hash_table_insert( |
| 295 | proc_dbg_info_src->ip_to_debug_info_src, |
| 296 | key, debug_info_src); |
| 297 | /* Ownership passed to ht. */ |
| 298 | key = NULL; |
| 299 | } |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | end: |
| 304 | free(key); |
| 305 | return debug_info_src; |
| 306 | } |
| 307 | |
| 308 | BT_HIDDEN |
| 309 | struct debug_info_source *debug_info_query(struct debug_info *debug_info, |
| 310 | int64_t vpid, uint64_t ip) |
| 311 | { |
| 312 | struct debug_info_source *dbg_info_src = NULL; |
| 313 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 314 | |
| 315 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 316 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 317 | if (!proc_dbg_info_src) { |
| 318 | goto end; |
| 319 | } |
| 320 | |
| 321 | dbg_info_src = proc_debug_info_sources_get_entry(proc_dbg_info_src, ip); |
| 322 | |
| 323 | end: |
| 324 | return dbg_info_src; |
| 325 | } |
| 326 | |
| 327 | BT_HIDDEN |
| 328 | struct debug_info *debug_info_create(struct debug_info_component *comp) |
| 329 | { |
| 330 | int ret; |
| 331 | struct debug_info *debug_info; |
| 332 | |
| 333 | debug_info = g_new0(struct debug_info, 1); |
| 334 | if (!debug_info) { |
| 335 | goto end; |
| 336 | } |
| 337 | |
| 338 | debug_info->vpid_to_proc_dbg_info_src = g_hash_table_new_full( |
| 339 | g_int64_hash, g_int64_equal, (GDestroyNotify) g_free, |
| 340 | (GDestroyNotify) proc_debug_info_sources_destroy); |
| 341 | if (!debug_info->vpid_to_proc_dbg_info_src) { |
| 342 | goto error; |
| 343 | } |
| 344 | |
| 345 | debug_info->comp = comp; |
| 346 | ret = debug_info_init(debug_info); |
| 347 | if (ret) { |
| 348 | goto error; |
| 349 | } |
| 350 | |
| 351 | end: |
| 352 | return debug_info; |
| 353 | error: |
| 354 | g_free(debug_info); |
| 355 | return NULL; |
| 356 | } |
| 357 | |
| 358 | BT_HIDDEN |
| 359 | void debug_info_destroy(struct debug_info *debug_info) |
| 360 | { |
| 361 | if (!debug_info) { |
| 362 | goto end; |
| 363 | } |
| 364 | |
| 365 | if (debug_info->vpid_to_proc_dbg_info_src) { |
| 366 | g_hash_table_destroy(debug_info->vpid_to_proc_dbg_info_src); |
| 367 | } |
| 368 | |
| 369 | g_free(debug_info); |
| 370 | end: |
| 371 | return; |
| 372 | } |
| 373 | |
| 374 | static |
| 375 | void handle_statedump_build_id_event(FILE *err, struct debug_info *debug_info, |
| 376 | struct bt_ctf_event *event) |
| 377 | { |
| 378 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 379 | struct bin_info *bin = NULL; |
| 380 | int ret; |
| 381 | int64_t vpid; |
| 382 | uint64_t baddr; |
| 383 | |
| 384 | ret = get_stream_event_context_int_field_value(err, |
| 385 | event, "_vpid", &vpid); |
| 386 | if (ret) { |
| 387 | goto end; |
| 388 | } |
| 389 | |
| 390 | ret = get_payload_unsigned_int_field_value(err, |
| 391 | event, "_baddr", &baddr); |
| 392 | if (ret) { |
| 393 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 394 | __FILE__, __LINE__); |
| 395 | goto end; |
| 396 | } |
| 397 | |
| 398 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 399 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 400 | if (!proc_dbg_info_src) { |
| 401 | goto end; |
| 402 | } |
| 403 | |
| 404 | bin = g_hash_table_lookup(proc_dbg_info_src->baddr_to_bin_info, |
| 405 | (gpointer) &baddr); |
| 406 | if (!bin) { |
| 407 | /* |
| 408 | * The build_id event comes after the bin has been |
| 409 | * created. If it isn't found, just ignore this event. |
| 410 | */ |
| 411 | goto end; |
| 412 | } |
| 413 | |
| 414 | ret = get_payload_build_id_field_value(err, event, "_build_id", |
| 415 | &bin->build_id, &bin->build_id_len); |
| 416 | if (ret) { |
| 417 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 418 | __FILE__, __LINE__); |
| 419 | goto end; |
| 420 | } |
| 421 | |
| 422 | /* |
| 423 | * Reset the is_elf_only flag in case it had been set |
| 424 | * previously, because we might find separate debug info using |
| 425 | * the new build id information. |
| 426 | */ |
| 427 | bin->is_elf_only = false; |
| 428 | |
| 429 | // TODO |
| 430 | // bin_info_set_build_id(bin, build_id, build_id_len); |
| 431 | |
| 432 | end: |
| 433 | return; |
| 434 | } |
| 435 | |
| 436 | static |
| 437 | void handle_statedump_debug_link_event(FILE *err, struct debug_info *debug_info, |
| 438 | struct bt_ctf_event *event) |
| 439 | { |
| 440 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 441 | struct bin_info *bin = NULL; |
| 442 | int64_t vpid; |
| 443 | uint64_t baddr; |
| 444 | const char *filename = NULL; |
| 445 | uint32_t crc32; |
| 446 | uint64_t tmp; |
| 447 | int ret; |
| 448 | |
| 449 | ret = get_stream_event_context_int_field_value(err, event, |
| 450 | "_vpid", &vpid); |
| 451 | if (ret) { |
| 452 | goto end; |
| 453 | } |
| 454 | |
| 455 | ret = get_payload_unsigned_int_field_value(err, |
| 456 | event, "_baddr", &baddr); |
| 457 | if (ret) { |
| 458 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 459 | __FILE__, __LINE__); |
| 460 | ret = -1; |
| 461 | goto end; |
| 462 | } |
| 463 | |
| 464 | ret = get_payload_unsigned_int_field_value(err, event, "_crc32", &tmp); |
| 465 | if (ret) { |
| 466 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 467 | __FILE__, __LINE__); |
| 468 | ret = -1; |
| 469 | goto end; |
| 470 | } |
| 471 | crc32 = (uint32_t) tmp; |
| 472 | |
| 473 | ret = get_payload_string_field_value(err, |
| 474 | event, "_filename", &filename); |
| 475 | if (ret) { |
| 476 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 477 | __FILE__, __LINE__); |
| 478 | ret = -1; |
| 479 | goto end; |
| 480 | } |
| 481 | |
| 482 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 483 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 484 | if (!proc_dbg_info_src) { |
| 485 | goto end; |
| 486 | } |
| 487 | |
| 488 | bin = g_hash_table_lookup(proc_dbg_info_src->baddr_to_bin_info, |
| 489 | (gpointer) &baddr); |
| 490 | if (!bin) { |
| 491 | /* |
| 492 | * The debug_link event comes after the bin has been |
| 493 | * created. If it isn't found, just ignore this event. |
| 494 | */ |
| 495 | goto end; |
| 496 | } |
| 497 | |
| 498 | bin_info_set_debug_link(bin, filename, crc32); |
| 499 | |
| 500 | end: |
| 501 | return; |
| 502 | } |
| 503 | |
| 504 | static |
| 505 | void handle_bin_info_event(FILE *err, struct debug_info *debug_info, |
| 506 | struct bt_ctf_event *event, bool has_pic_field) |
| 507 | { |
| 508 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 509 | struct bin_info *bin; |
| 510 | uint64_t baddr, memsz; |
| 511 | int64_t vpid; |
| 512 | const char *path; |
| 513 | gpointer key = NULL; |
| 514 | bool is_pic; |
| 515 | int ret; |
| 516 | |
| 517 | ret = get_payload_unsigned_int_field_value(err, |
| 518 | event, "_baddr", &baddr); |
| 519 | if (ret) { |
| 520 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 521 | __FILE__, __LINE__); |
| 522 | goto end; |
| 523 | } |
| 524 | |
| 525 | ret = get_payload_unsigned_int_field_value(err, |
| 526 | event, "_memsz", &memsz); |
| 527 | if (ret) { |
| 528 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 529 | __FILE__, __LINE__); |
| 530 | goto end; |
| 531 | } |
| 532 | |
| 533 | /* |
| 534 | * This field is not produced by the dlopen event emitted before |
| 535 | * lttng-ust 2.9. |
| 536 | */ |
| 537 | ret = get_payload_string_field_value(err, |
| 538 | event, "_path", &path); |
| 539 | if (ret || !path) { |
| 540 | goto end; |
| 541 | } |
| 542 | |
| 543 | if (has_pic_field) { |
| 544 | uint64_t tmp; |
| 545 | |
| 546 | ret = get_payload_unsigned_int_field_value(err, |
| 547 | event, "_is_pic", &tmp); |
| 548 | if (ret) { |
| 549 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 550 | __FILE__, __LINE__); |
| 551 | ret = -1; |
| 552 | goto end; |
| 553 | } |
| 554 | is_pic = (tmp == 1); |
| 555 | } else { |
| 556 | /* |
| 557 | * dlopen has no is_pic field, because the shared |
| 558 | * object is always PIC. |
| 559 | */ |
| 560 | is_pic = true; |
| 561 | } |
| 562 | |
| 563 | ret = get_stream_event_context_int_field_value(err, event, "_vpid", |
| 564 | &vpid); |
| 565 | if (ret) { |
| 566 | goto end; |
| 567 | } |
| 568 | |
| 569 | if (memsz == 0) { |
| 570 | /* Ignore VDSO. */ |
| 571 | goto end; |
| 572 | } |
| 573 | |
| 574 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 575 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 576 | if (!proc_dbg_info_src) { |
| 577 | goto end; |
| 578 | } |
| 579 | |
| 580 | key = g_new0(uint64_t, 1); |
| 581 | if (!key) { |
| 582 | goto end; |
| 583 | } |
| 584 | |
| 585 | *((uint64_t *) key) = baddr; |
| 586 | |
| 587 | bin = g_hash_table_lookup(proc_dbg_info_src->baddr_to_bin_info, |
| 588 | key); |
| 589 | if (bin) { |
| 590 | goto end; |
| 591 | } |
| 592 | |
| 593 | bin = bin_info_create(path, baddr, memsz, is_pic, |
| 594 | debug_info->comp->arg_debug_dir, |
| 595 | debug_info->comp->arg_target_prefix); |
| 596 | if (!bin) { |
| 597 | goto end; |
| 598 | } |
| 599 | |
| 600 | g_hash_table_insert(proc_dbg_info_src->baddr_to_bin_info, |
| 601 | key, bin); |
| 602 | /* Ownership passed to ht. */ |
| 603 | key = NULL; |
| 604 | |
| 605 | end: |
| 606 | g_free(key); |
| 607 | return; |
| 608 | } |
| 609 | |
| 610 | static inline |
| 611 | void handle_statedump_bin_info_event(FILE *err, struct debug_info *debug_info, |
| 612 | struct bt_ctf_event *event) |
| 613 | { |
| 614 | handle_bin_info_event(err, debug_info, event, true); |
| 615 | } |
| 616 | |
| 617 | static inline |
| 618 | void handle_lib_load_event(FILE *err, struct debug_info *debug_info, |
| 619 | struct bt_ctf_event *event) |
| 620 | { |
| 621 | handle_bin_info_event(err, debug_info, event, false); |
| 622 | } |
| 623 | |
| 624 | static inline |
| 625 | void handle_lib_unload_event(FILE *err, struct debug_info *debug_info, |
| 626 | struct bt_ctf_event *event) |
| 627 | { |
| 628 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 629 | uint64_t baddr; |
| 630 | int64_t vpid; |
| 631 | gpointer key_ptr = NULL; |
| 632 | int ret; |
| 633 | |
| 634 | ret = get_payload_unsigned_int_field_value(err, |
| 635 | event, "_baddr", &baddr); |
| 636 | if (ret) { |
| 637 | fprintf(err, "[error] %s in %s:%d\n", __func__, |
| 638 | __FILE__, __LINE__); |
| 639 | ret = -1; |
| 640 | goto end; |
| 641 | } |
| 642 | |
| 643 | ret = get_stream_event_context_int_field_value(err, event, "_vpid", |
| 644 | &vpid); |
| 645 | if (ret) { |
| 646 | goto end; |
| 647 | } |
| 648 | |
| 649 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 650 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 651 | if (!proc_dbg_info_src) { |
| 652 | goto end; |
| 653 | } |
| 654 | |
| 655 | key_ptr = (gpointer) &baddr; |
| 656 | (void) g_hash_table_remove(proc_dbg_info_src->baddr_to_bin_info, |
| 657 | key_ptr); |
| 658 | end: |
| 659 | return; |
| 660 | } |
| 661 | |
| 662 | static |
| 663 | void handle_statedump_start(FILE *err, struct debug_info *debug_info, |
| 664 | struct bt_ctf_event *event) |
| 665 | { |
| 666 | struct proc_debug_info_sources *proc_dbg_info_src; |
| 667 | int64_t vpid; |
| 668 | int ret; |
| 669 | |
| 670 | ret = get_stream_event_context_int_field_value(err, event, |
| 671 | "_vpid", &vpid); |
| 672 | if (ret) { |
| 673 | goto end; |
| 674 | } |
| 675 | |
| 676 | proc_dbg_info_src = proc_debug_info_sources_ht_get_entry( |
| 677 | debug_info->vpid_to_proc_dbg_info_src, vpid); |
| 678 | if (!proc_dbg_info_src) { |
| 679 | goto end; |
| 680 | } |
| 681 | |
| 682 | g_hash_table_remove_all(proc_dbg_info_src->baddr_to_bin_info); |
| 683 | g_hash_table_remove_all(proc_dbg_info_src->ip_to_debug_info_src); |
| 684 | |
| 685 | end: |
| 686 | return; |
| 687 | } |
| 688 | |
| 689 | BT_HIDDEN |
| 690 | void debug_info_handle_event(FILE *err, struct bt_ctf_event *event, |
| 691 | struct debug_info *debug_info) |
| 692 | { |
| 693 | struct bt_ctf_event_class *event_class; |
| 694 | const char *event_name; |
| 695 | GQuark q_event_name; |
| 696 | |
| 697 | if (!debug_info || !event) { |
| 698 | goto end; |
| 699 | } |
| 700 | event_class = bt_ctf_event_get_class(event); |
| 701 | if (!event_class) { |
| 702 | goto end; |
| 703 | } |
| 704 | event_name = bt_ctf_event_class_get_name(event_class); |
| 705 | if (!event_name) { |
| 706 | goto end_put_class; |
| 707 | } |
| 708 | q_event_name = g_quark_try_string(event_name); |
| 709 | |
| 710 | if (q_event_name == debug_info->q_statedump_bin_info) { |
| 711 | /* State dump */ |
| 712 | handle_statedump_bin_info_event(err, debug_info, event); |
| 713 | } else if (q_event_name == debug_info->q_dl_open || |
| 714 | q_event_name == debug_info->q_lib_load) { |
| 715 | /* |
| 716 | * dl_open and lib_load events are both checked for since |
| 717 | * only dl_open was produced as of lttng-ust 2.8. |
| 718 | * |
| 719 | * lib_load, which is produced from lttng-ust 2.9+, is a lot |
| 720 | * more reliable since it will be emitted when other functions |
| 721 | * of the dlopen family are called (e.g. dlmopen) and when |
| 722 | * library are transitively loaded. |
| 723 | */ |
| 724 | handle_lib_load_event(err, debug_info, event); |
| 725 | } else if (q_event_name == debug_info->q_statedump_start) { |
| 726 | /* Start state dump */ |
| 727 | handle_statedump_start(err, debug_info, event); |
| 728 | } else if (q_event_name == debug_info->q_statedump_debug_link) { |
| 729 | /* Debug link info */ |
| 730 | handle_statedump_debug_link_event(err, debug_info, event); |
| 731 | } else if (q_event_name == debug_info->q_statedump_build_id) { |
| 732 | /* Build ID info */ |
| 733 | handle_statedump_build_id_event(err, debug_info, event); |
| 734 | } else if (q_event_name == debug_info-> q_lib_unload) { |
| 735 | handle_lib_unload_event(err, debug_info, event); |
| 736 | } |
| 737 | |
| 738 | end_put_class: |
| 739 | bt_put(event_class); |
| 740 | end: |
| 741 | return; |
| 742 | } |