1 #include "symbol.h" 2 #include "dso.h" 3 #include "machine.h" 4 #include "util.h" 5 #include "debug.h" 6 7 char dso__symtab_origin(const struct dso *dso) 8 { 9 static const char origin[] = { 10 [DSO_BINARY_TYPE__KALLSYMS] = 'k', 11 [DSO_BINARY_TYPE__VMLINUX] = 'v', 12 [DSO_BINARY_TYPE__JAVA_JIT] = 'j', 13 [DSO_BINARY_TYPE__DEBUGLINK] = 'l', 14 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', 15 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', 16 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', 17 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', 18 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', 19 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', 20 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', 21 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', 22 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', 23 }; 24 25 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) 26 return '!'; 27 return origin[dso->symtab_type]; 28 } 29 30 int dso__binary_type_file(struct dso *dso, enum dso_binary_type type, 31 char *root_dir, char *file, size_t size) 32 { 33 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 34 int ret = 0; 35 36 switch (type) { 37 case DSO_BINARY_TYPE__DEBUGLINK: { 38 char *debuglink; 39 40 strncpy(file, dso->long_name, size); 41 debuglink = file + dso->long_name_len; 42 while (debuglink != file && *debuglink != '/') 43 debuglink--; 44 if (*debuglink == '/') 45 debuglink++; 46 filename__read_debuglink(dso->long_name, debuglink, 47 size - (debuglink - file)); 48 } 49 break; 50 case DSO_BINARY_TYPE__BUILD_ID_CACHE: 51 /* skip the locally configured cache if a symfs is given */ 52 if (symbol_conf.symfs[0] || 53 (dso__build_id_filename(dso, file, size) == NULL)) 54 ret = -1; 55 break; 56 57 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: 58 snprintf(file, size, "%s/usr/lib/debug%s.debug", 59 symbol_conf.symfs, dso->long_name); 60 break; 61 62 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: 63 snprintf(file, size, "%s/usr/lib/debug%s", 64 symbol_conf.symfs, dso->long_name); 65 break; 66 67 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: 68 if (!dso->has_build_id) { 69 ret = -1; 70 break; 71 } 72 73 build_id__sprintf(dso->build_id, 74 sizeof(dso->build_id), 75 build_id_hex); 76 snprintf(file, size, 77 "%s/usr/lib/debug/.build-id/%.2s/%s.debug", 78 symbol_conf.symfs, build_id_hex, build_id_hex + 2); 79 break; 80 81 case DSO_BINARY_TYPE__VMLINUX: 82 case DSO_BINARY_TYPE__GUEST_VMLINUX: 83 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: 84 snprintf(file, size, "%s%s", 85 symbol_conf.symfs, dso->long_name); 86 break; 87 88 case DSO_BINARY_TYPE__GUEST_KMODULE: 89 snprintf(file, size, "%s%s%s", symbol_conf.symfs, 90 root_dir, dso->long_name); 91 break; 92 93 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: 94 snprintf(file, size, "%s%s", symbol_conf.symfs, 95 dso->long_name); 96 break; 97 98 case DSO_BINARY_TYPE__KCORE: 99 case DSO_BINARY_TYPE__GUEST_KCORE: 100 snprintf(file, size, "%s", dso->long_name); 101 break; 102 103 default: 104 case DSO_BINARY_TYPE__KALLSYMS: 105 case DSO_BINARY_TYPE__GUEST_KALLSYMS: 106 case DSO_BINARY_TYPE__JAVA_JIT: 107 case DSO_BINARY_TYPE__NOT_FOUND: 108 ret = -1; 109 break; 110 } 111 112 return ret; 113 } 114 115 static int open_dso(struct dso *dso, struct machine *machine) 116 { 117 char *root_dir = (char *) ""; 118 char *name; 119 int fd; 120 121 name = malloc(PATH_MAX); 122 if (!name) 123 return -ENOMEM; 124 125 if (machine) 126 root_dir = machine->root_dir; 127 128 if (dso__binary_type_file(dso, dso->data_type, 129 root_dir, name, PATH_MAX)) { 130 free(name); 131 return -EINVAL; 132 } 133 134 fd = open(name, O_RDONLY); 135 free(name); 136 return fd; 137 } 138 139 int dso__data_fd(struct dso *dso, struct machine *machine) 140 { 141 static enum dso_binary_type binary_type_data[] = { 142 DSO_BINARY_TYPE__BUILD_ID_CACHE, 143 DSO_BINARY_TYPE__SYSTEM_PATH_DSO, 144 DSO_BINARY_TYPE__NOT_FOUND, 145 }; 146 int i = 0; 147 148 if (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND) 149 return open_dso(dso, machine); 150 151 do { 152 int fd; 153 154 dso->data_type = binary_type_data[i++]; 155 156 fd = open_dso(dso, machine); 157 if (fd >= 0) 158 return fd; 159 160 } while (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND); 161 162 return -EINVAL; 163 } 164 165 static void 166 dso_cache__free(struct rb_root *root) 167 { 168 struct rb_node *next = rb_first(root); 169 170 while (next) { 171 struct dso_cache *cache; 172 173 cache = rb_entry(next, struct dso_cache, rb_node); 174 next = rb_next(&cache->rb_node); 175 rb_erase(&cache->rb_node, root); 176 free(cache); 177 } 178 } 179 180 static struct dso_cache* 181 dso_cache__find(struct rb_root *root, u64 offset) 182 { 183 struct rb_node **p = &root->rb_node; 184 struct rb_node *parent = NULL; 185 struct dso_cache *cache; 186 187 while (*p != NULL) { 188 u64 end; 189 190 parent = *p; 191 cache = rb_entry(parent, struct dso_cache, rb_node); 192 end = cache->offset + DSO__DATA_CACHE_SIZE; 193 194 if (offset < cache->offset) 195 p = &(*p)->rb_left; 196 else if (offset >= end) 197 p = &(*p)->rb_right; 198 else 199 return cache; 200 } 201 return NULL; 202 } 203 204 static void 205 dso_cache__insert(struct rb_root *root, struct dso_cache *new) 206 { 207 struct rb_node **p = &root->rb_node; 208 struct rb_node *parent = NULL; 209 struct dso_cache *cache; 210 u64 offset = new->offset; 211 212 while (*p != NULL) { 213 u64 end; 214 215 parent = *p; 216 cache = rb_entry(parent, struct dso_cache, rb_node); 217 end = cache->offset + DSO__DATA_CACHE_SIZE; 218 219 if (offset < cache->offset) 220 p = &(*p)->rb_left; 221 else if (offset >= end) 222 p = &(*p)->rb_right; 223 } 224 225 rb_link_node(&new->rb_node, parent, p); 226 rb_insert_color(&new->rb_node, root); 227 } 228 229 static ssize_t 230 dso_cache__memcpy(struct dso_cache *cache, u64 offset, 231 u8 *data, u64 size) 232 { 233 u64 cache_offset = offset - cache->offset; 234 u64 cache_size = min(cache->size - cache_offset, size); 235 236 memcpy(data, cache->data + cache_offset, cache_size); 237 return cache_size; 238 } 239 240 static ssize_t 241 dso_cache__read(struct dso *dso, struct machine *machine, 242 u64 offset, u8 *data, ssize_t size) 243 { 244 struct dso_cache *cache; 245 ssize_t ret; 246 int fd; 247 248 fd = dso__data_fd(dso, machine); 249 if (fd < 0) 250 return -1; 251 252 do { 253 u64 cache_offset; 254 255 ret = -ENOMEM; 256 257 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); 258 if (!cache) 259 break; 260 261 cache_offset = offset & DSO__DATA_CACHE_MASK; 262 ret = -EINVAL; 263 264 if (-1 == lseek(fd, cache_offset, SEEK_SET)) 265 break; 266 267 ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE); 268 if (ret <= 0) 269 break; 270 271 cache->offset = cache_offset; 272 cache->size = ret; 273 dso_cache__insert(&dso->cache, cache); 274 275 ret = dso_cache__memcpy(cache, offset, data, size); 276 277 } while (0); 278 279 if (ret <= 0) 280 free(cache); 281 282 close(fd); 283 return ret; 284 } 285 286 static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, 287 u64 offset, u8 *data, ssize_t size) 288 { 289 struct dso_cache *cache; 290 291 cache = dso_cache__find(&dso->cache, offset); 292 if (cache) 293 return dso_cache__memcpy(cache, offset, data, size); 294 else 295 return dso_cache__read(dso, machine, offset, data, size); 296 } 297 298 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, 299 u64 offset, u8 *data, ssize_t size) 300 { 301 ssize_t r = 0; 302 u8 *p = data; 303 304 do { 305 ssize_t ret; 306 307 ret = dso_cache_read(dso, machine, offset, p, size); 308 if (ret < 0) 309 return ret; 310 311 /* Reached EOF, return what we have. */ 312 if (!ret) 313 break; 314 315 BUG_ON(ret > size); 316 317 r += ret; 318 p += ret; 319 offset += ret; 320 size -= ret; 321 322 } while (size); 323 324 return r; 325 } 326 327 ssize_t dso__data_read_addr(struct dso *dso, struct map *map, 328 struct machine *machine, u64 addr, 329 u8 *data, ssize_t size) 330 { 331 u64 offset = map->map_ip(map, addr); 332 return dso__data_read_offset(dso, machine, offset, data, size); 333 } 334 335 struct map *dso__new_map(const char *name) 336 { 337 struct map *map = NULL; 338 struct dso *dso = dso__new(name); 339 340 if (dso) 341 map = map__new2(0, dso, MAP__FUNCTION); 342 343 return map; 344 } 345 346 struct dso *dso__kernel_findnew(struct machine *machine, const char *name, 347 const char *short_name, int dso_type) 348 { 349 /* 350 * The kernel dso could be created by build_id processing. 351 */ 352 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); 353 354 /* 355 * We need to run this in all cases, since during the build_id 356 * processing we had no idea this was the kernel dso. 357 */ 358 if (dso != NULL) { 359 dso__set_short_name(dso, short_name); 360 dso->kernel = dso_type; 361 } 362 363 return dso; 364 } 365 366 void dso__set_long_name(struct dso *dso, char *name) 367 { 368 if (name == NULL) 369 return; 370 dso->long_name = name; 371 dso->long_name_len = strlen(name); 372 } 373 374 void dso__set_short_name(struct dso *dso, const char *name) 375 { 376 if (name == NULL) 377 return; 378 dso->short_name = name; 379 dso->short_name_len = strlen(name); 380 } 381 382 static void dso__set_basename(struct dso *dso) 383 { 384 char *lname, *base; 385 386 /* 387 * basename may modify path buffer, so we must pass 388 * a copy. 389 */ 390 lname = strdup(dso->long_name); 391 if (!lname) 392 return; 393 394 /* 395 * basename may return pointer to internal 396 * storage which is reused in subsequent calls 397 * so copy the result 398 */ 399 base = strdup(basename(lname)); 400 401 free(lname); 402 403 if (!base) 404 return; 405 406 /* 407 * basename may modify content, so we must pass 408 * a copy. Moreover basename may return pointer to internal 409 * storage we may be reusing later on 410 */ 411 dso__set_short_name(dso, base); 412 } 413 414 int dso__name_len(const struct dso *dso) 415 { 416 if (!dso) 417 return strlen("[unknown]"); 418 if (verbose) 419 return dso->long_name_len; 420 421 return dso->short_name_len; 422 } 423 424 bool dso__loaded(const struct dso *dso, enum map_type type) 425 { 426 return dso->loaded & (1 << type); 427 } 428 429 bool dso__sorted_by_name(const struct dso *dso, enum map_type type) 430 { 431 return dso->sorted_by_name & (1 << type); 432 } 433 434 void dso__set_sorted_by_name(struct dso *dso, enum map_type type) 435 { 436 dso->sorted_by_name |= (1 << type); 437 } 438 439 struct dso *dso__new(const char *name) 440 { 441 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); 442 443 if (dso != NULL) { 444 int i; 445 strcpy(dso->name, name); 446 dso__set_long_name(dso, dso->name); 447 dso__set_short_name(dso, dso->name); 448 for (i = 0; i < MAP__NR_TYPES; ++i) 449 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; 450 dso->cache = RB_ROOT; 451 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; 452 dso->data_type = DSO_BINARY_TYPE__NOT_FOUND; 453 dso->loaded = 0; 454 dso->rel = 0; 455 dso->sorted_by_name = 0; 456 dso->has_build_id = 0; 457 dso->kernel = DSO_TYPE_USER; 458 dso->needs_swap = DSO_SWAP__UNSET; 459 INIT_LIST_HEAD(&dso->node); 460 } 461 462 return dso; 463 } 464 465 void dso__delete(struct dso *dso) 466 { 467 int i; 468 for (i = 0; i < MAP__NR_TYPES; ++i) 469 symbols__delete(&dso->symbols[i]); 470 if (dso->sname_alloc) 471 free((char *)dso->short_name); 472 if (dso->lname_alloc) 473 free(dso->long_name); 474 dso_cache__free(&dso->cache); 475 free(dso); 476 } 477 478 void dso__set_build_id(struct dso *dso, void *build_id) 479 { 480 memcpy(dso->build_id, build_id, sizeof(dso->build_id)); 481 dso->has_build_id = 1; 482 } 483 484 bool dso__build_id_equal(const struct dso *dso, u8 *build_id) 485 { 486 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; 487 } 488 489 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) 490 { 491 char path[PATH_MAX]; 492 493 if (machine__is_default_guest(machine)) 494 return; 495 sprintf(path, "%s/sys/kernel/notes", machine->root_dir); 496 if (sysfs__read_build_id(path, dso->build_id, 497 sizeof(dso->build_id)) == 0) 498 dso->has_build_id = true; 499 } 500 501 int dso__kernel_module_get_build_id(struct dso *dso, 502 const char *root_dir) 503 { 504 char filename[PATH_MAX]; 505 /* 506 * kernel module short names are of the form "[module]" and 507 * we need just "module" here. 508 */ 509 const char *name = dso->short_name + 1; 510 511 snprintf(filename, sizeof(filename), 512 "%s/sys/module/%.*s/notes/.note.gnu.build-id", 513 root_dir, (int)strlen(name) - 1, name); 514 515 if (sysfs__read_build_id(filename, dso->build_id, 516 sizeof(dso->build_id)) == 0) 517 dso->has_build_id = true; 518 519 return 0; 520 } 521 522 bool __dsos__read_build_ids(struct list_head *head, bool with_hits) 523 { 524 bool have_build_id = false; 525 struct dso *pos; 526 527 list_for_each_entry(pos, head, node) { 528 if (with_hits && !pos->hit) 529 continue; 530 if (pos->has_build_id) { 531 have_build_id = true; 532 continue; 533 } 534 if (filename__read_build_id(pos->long_name, pos->build_id, 535 sizeof(pos->build_id)) > 0) { 536 have_build_id = true; 537 pos->has_build_id = true; 538 } 539 } 540 541 return have_build_id; 542 } 543 544 void dsos__add(struct list_head *head, struct dso *dso) 545 { 546 list_add_tail(&dso->node, head); 547 } 548 549 struct dso *dsos__find(struct list_head *head, const char *name, bool cmp_short) 550 { 551 struct dso *pos; 552 553 if (cmp_short) { 554 list_for_each_entry(pos, head, node) 555 if (strcmp(pos->short_name, name) == 0) 556 return pos; 557 return NULL; 558 } 559 list_for_each_entry(pos, head, node) 560 if (strcmp(pos->long_name, name) == 0) 561 return pos; 562 return NULL; 563 } 564 565 struct dso *__dsos__findnew(struct list_head *head, const char *name) 566 { 567 struct dso *dso = dsos__find(head, name, false); 568 569 if (!dso) { 570 dso = dso__new(name); 571 if (dso != NULL) { 572 dsos__add(head, dso); 573 dso__set_basename(dso); 574 } 575 } 576 577 return dso; 578 } 579 580 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, 581 bool (skip)(struct dso *dso, int parm), int parm) 582 { 583 struct dso *pos; 584 size_t ret = 0; 585 586 list_for_each_entry(pos, head, node) { 587 if (skip && skip(pos, parm)) 588 continue; 589 ret += dso__fprintf_buildid(pos, fp); 590 ret += fprintf(fp, " %s\n", pos->long_name); 591 } 592 return ret; 593 } 594 595 size_t __dsos__fprintf(struct list_head *head, FILE *fp) 596 { 597 struct dso *pos; 598 size_t ret = 0; 599 600 list_for_each_entry(pos, head, node) { 601 int i; 602 for (i = 0; i < MAP__NR_TYPES; ++i) 603 ret += dso__fprintf(pos, i, fp); 604 } 605 606 return ret; 607 } 608 609 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) 610 { 611 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 612 613 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); 614 return fprintf(fp, "%s", sbuild_id); 615 } 616 617 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) 618 { 619 struct rb_node *nd; 620 size_t ret = fprintf(fp, "dso: %s (", dso->short_name); 621 622 if (dso->short_name != dso->long_name) 623 ret += fprintf(fp, "%s, ", dso->long_name); 624 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], 625 dso__loaded(dso, type) ? "" : "NOT "); 626 ret += dso__fprintf_buildid(dso, fp); 627 ret += fprintf(fp, ")\n"); 628 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { 629 struct symbol *pos = rb_entry(nd, struct symbol, rb_node); 630 ret += symbol__fprintf(pos, fp); 631 } 632 633 return ret; 634 } 635
