1#include <asm/bug.h> 2#include <sys/time.h> 3#include <sys/resource.h> 4#include "symbol.h" 5#include "dso.h" 6#include "machine.h" 7#include "util.h" 8#include "debug.h" 9 10char dso__symtab_origin(const struct dso *dso) 11{ 12 static const char origin[] = { 13 [DSO_BINARY_TYPE__KALLSYMS] = 'k', 14 [DSO_BINARY_TYPE__VMLINUX] = 'v', 15 [DSO_BINARY_TYPE__JAVA_JIT] = 'j', 16 [DSO_BINARY_TYPE__DEBUGLINK] = 'l', 17 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', 18 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', 19 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', 20 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', 21 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', 22 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', 23 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', 24 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', 25 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', 26 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', 27 [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', 28 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', 29 }; 30 31 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) 32 return '!'; 33 return origin[dso->symtab_type]; 34} 35 36int dso__read_binary_type_filename(const struct dso *dso, 37 enum dso_binary_type type, 38 char *root_dir, char *filename, size_t size) 39{ 40 char build_id_hex[BUILD_ID_SIZE * 2 + 1]; 41 int ret = 0; 42 size_t len; 43 44 switch (type) { 45 case DSO_BINARY_TYPE__DEBUGLINK: { 46 char *debuglink; 47 48 len = __symbol__join_symfs(filename, size, dso->long_name); 49 debuglink = filename + len; 50 while (debuglink != filename && *debuglink != '/') 51 debuglink--; 52 if (*debuglink == '/') 53 debuglink++; 54 ret = filename__read_debuglink(filename, debuglink, 55 size - (debuglink - filename)); 56 } 57 break; 58 case DSO_BINARY_TYPE__BUILD_ID_CACHE: 59 /* skip the locally configured cache if a symfs is given */ 60 if (symbol_conf.symfs[0] || 61 (dso__build_id_filename(dso, filename, size) == NULL)) 62 ret = -1; 63 break; 64 65 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: 66 len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); 67 snprintf(filename + len, size - len, "%s.debug", dso->long_name); 68 break; 69 70 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: 71 len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); 72 snprintf(filename + len, size - len, "%s", dso->long_name); 73 break; 74 75 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: 76 { 77 const char *last_slash; 78 size_t dir_size; 79 80 last_slash = dso->long_name + dso->long_name_len; 81 while (last_slash != dso->long_name && *last_slash != '/') 82 last_slash--; 83 84 len = __symbol__join_symfs(filename, size, ""); 85 dir_size = last_slash - dso->long_name + 2; 86 if (dir_size > (size - len)) { 87 ret = -1; 88 break; 89 } 90 len += scnprintf(filename + len, dir_size, "%s", dso->long_name); 91 len += scnprintf(filename + len , size - len, ".debug%s", 92 last_slash); 93 break; 94 } 95 96 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: 97 if (!dso->has_build_id) { 98 ret = -1; 99 break; 100 } 101 102 build_id__sprintf(dso->build_id, 103 sizeof(dso->build_id), 104 build_id_hex); 105 len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); 106 snprintf(filename + len, size - len, "%.2s/%s.debug", 107 build_id_hex, build_id_hex + 2); 108 break; 109 110 case DSO_BINARY_TYPE__VMLINUX: 111 case DSO_BINARY_TYPE__GUEST_VMLINUX: 112 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: 113 __symbol__join_symfs(filename, size, dso->long_name); 114 break; 115 116 case DSO_BINARY_TYPE__GUEST_KMODULE: 117 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: 118 path__join3(filename, size, symbol_conf.symfs, 119 root_dir, dso->long_name); 120 break; 121 122 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: 123 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: 124 __symbol__join_symfs(filename, size, dso->long_name); 125 break; 126 127 case DSO_BINARY_TYPE__KCORE: 128 case DSO_BINARY_TYPE__GUEST_KCORE: 129 snprintf(filename, size, "%s", dso->long_name); 130 break; 131 132 default: 133 case DSO_BINARY_TYPE__KALLSYMS: 134 case DSO_BINARY_TYPE__GUEST_KALLSYMS: 135 case DSO_BINARY_TYPE__JAVA_JIT: 136 case DSO_BINARY_TYPE__NOT_FOUND: 137 ret = -1; 138 break; 139 } 140 141 return ret; 142} 143 144static const struct { 145 const char *fmt; 146 int (*decompress)(const char *input, int output); 147} compressions[] = { 148#ifdef HAVE_ZLIB_SUPPORT 149 { "gz", gzip_decompress_to_file }, 150#endif 151#ifdef HAVE_LZMA_SUPPORT 152 { "xz", lzma_decompress_to_file }, 153#endif 154 { NULL, NULL }, 155}; 156 157bool is_supported_compression(const char *ext) 158{ 159 unsigned i; 160 161 for (i = 0; compressions[i].fmt; i++) { 162 if (!strcmp(ext, compressions[i].fmt)) 163 return true; 164 } 165 return false; 166} 167 168bool is_kernel_module(const char *pathname) 169{ 170 struct kmod_path m; 171 172 if (kmod_path__parse(&m, pathname)) 173 return NULL; 174 175 return m.kmod; 176} 177 178bool decompress_to_file(const char *ext, const char *filename, int output_fd) 179{ 180 unsigned i; 181 182 for (i = 0; compressions[i].fmt; i++) { 183 if (!strcmp(ext, compressions[i].fmt)) 184 return !compressions[i].decompress(filename, 185 output_fd); 186 } 187 return false; 188} 189 190bool dso__needs_decompress(struct dso *dso) 191{ 192 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || 193 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; 194} 195 196/* 197 * Parses kernel module specified in @path and updates 198 * @m argument like: 199 * 200 * @comp - true if @path contains supported compression suffix, 201 * false otherwise 202 * @kmod - true if @path contains '.ko' suffix in right position, 203 * false otherwise 204 * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name 205 * of the kernel module without suffixes, otherwise strudup-ed 206 * base name of @path 207 * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string 208 * the compression suffix 209 * 210 * Returns 0 if there's no strdup error, -ENOMEM otherwise. 211 */ 212int __kmod_path__parse(struct kmod_path *m, const char *path, 213 bool alloc_name, bool alloc_ext) 214{ 215 const char *name = strrchr(path, '/'); 216 const char *ext = strrchr(path, '.'); 217 218 memset(m, 0x0, sizeof(*m)); 219 name = name ? name + 1 : path; 220 221 /* No extension, just return name. */ 222 if (ext == NULL) { 223 if (alloc_name) { 224 m->name = strdup(name); 225 return m->name ? 0 : -ENOMEM; 226 } 227 return 0; 228 } 229 230 if (is_supported_compression(ext + 1)) { 231 m->comp = true; 232 ext -= 3; 233 } 234 235 /* Check .ko extension only if there's enough name left. */ 236 if (ext > name) 237 m->kmod = !strncmp(ext, ".ko", 3); 238 239 if (alloc_name) { 240 if (m->kmod) { 241 if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1) 242 return -ENOMEM; 243 } else { 244 if (asprintf(&m->name, "%s", name) == -1) 245 return -ENOMEM; 246 } 247 248 strxfrchar(m->name, '-', '_'); 249 } 250 251 if (alloc_ext && m->comp) { 252 m->ext = strdup(ext + 4); 253 if (!m->ext) { 254 free((void *) m->name); 255 return -ENOMEM; 256 } 257 } 258 259 return 0; 260} 261 262/* 263 * Global list of open DSOs and the counter. 264 */ 265static LIST_HEAD(dso__data_open); 266static long dso__data_open_cnt; 267 268static void dso__list_add(struct dso *dso) 269{ 270 list_add_tail(&dso->data.open_entry, &dso__data_open); 271 dso__data_open_cnt++; 272} 273 274static void dso__list_del(struct dso *dso) 275{ 276 list_del(&dso->data.open_entry); 277 WARN_ONCE(dso__data_open_cnt <= 0, 278 "DSO data fd counter out of bounds."); 279 dso__data_open_cnt--; 280} 281 282static void close_first_dso(void); 283 284static int do_open(char *name) 285{ 286 int fd; 287 char sbuf[STRERR_BUFSIZE]; 288 289 do { 290 fd = open(name, O_RDONLY); 291 if (fd >= 0) 292 return fd; 293 294 pr_debug("dso open failed: %s\n", 295 strerror_r(errno, sbuf, sizeof(sbuf))); 296 if (!dso__data_open_cnt || errno != EMFILE) 297 break; 298 299 close_first_dso(); 300 } while (1); 301 302 return -1; 303} 304 305static int __open_dso(struct dso *dso, struct machine *machine) 306{ 307 int fd; 308 char *root_dir = (char *)""; 309 char *name = malloc(PATH_MAX); 310 311 if (!name) 312 return -ENOMEM; 313 314 if (machine) 315 root_dir = machine->root_dir; 316 317 if (dso__read_binary_type_filename(dso, dso->binary_type, 318 root_dir, name, PATH_MAX)) { 319 free(name); 320 return -EINVAL; 321 } 322 323 fd = do_open(name); 324 free(name); 325 return fd; 326} 327 328static void check_data_close(void); 329 330/** 331 * dso_close - Open DSO data file 332 * @dso: dso object 333 * 334 * Open @dso's data file descriptor and updates 335 * list/count of open DSO objects. 336 */ 337static int open_dso(struct dso *dso, struct machine *machine) 338{ 339 int fd = __open_dso(dso, machine); 340 341 if (fd >= 0) { 342 dso__list_add(dso); 343 /* 344 * Check if we crossed the allowed number 345 * of opened DSOs and close one if needed. 346 */ 347 check_data_close(); 348 } 349 350 return fd; 351} 352 353static void close_data_fd(struct dso *dso) 354{ 355 if (dso->data.fd >= 0) { 356 close(dso->data.fd); 357 dso->data.fd = -1; 358 dso->data.file_size = 0; 359 dso__list_del(dso); 360 } 361} 362 363/** 364 * dso_close - Close DSO data file 365 * @dso: dso object 366 * 367 * Close @dso's data file descriptor and updates 368 * list/count of open DSO objects. 369 */ 370static void close_dso(struct dso *dso) 371{ 372 close_data_fd(dso); 373} 374 375static void close_first_dso(void) 376{ 377 struct dso *dso; 378 379 dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); 380 close_dso(dso); 381} 382 383static rlim_t get_fd_limit(void) 384{ 385 struct rlimit l; 386 rlim_t limit = 0; 387 388 /* Allow half of the current open fd limit. */ 389 if (getrlimit(RLIMIT_NOFILE, &l) == 0) { 390 if (l.rlim_cur == RLIM_INFINITY) 391 limit = l.rlim_cur; 392 else 393 limit = l.rlim_cur / 2; 394 } else { 395 pr_err("failed to get fd limit\n"); 396 limit = 1; 397 } 398 399 return limit; 400} 401 402static bool may_cache_fd(void) 403{ 404 static rlim_t limit; 405 406 if (!limit) 407 limit = get_fd_limit(); 408 409 if (limit == RLIM_INFINITY) 410 return true; 411 412 return limit > (rlim_t) dso__data_open_cnt; 413} 414 415/* 416 * Check and close LRU dso if we crossed allowed limit 417 * for opened dso file descriptors. The limit is half 418 * of the RLIMIT_NOFILE files opened. 419*/ 420static void check_data_close(void) 421{ 422 bool cache_fd = may_cache_fd(); 423 424 if (!cache_fd) 425 close_first_dso(); 426} 427 428/** 429 * dso__data_close - Close DSO data file 430 * @dso: dso object 431 * 432 * External interface to close @dso's data file descriptor. 433 */ 434void dso__data_close(struct dso *dso) 435{ 436 close_dso(dso); 437} 438 439/** 440 * dso__data_fd - Get dso's data file descriptor 441 * @dso: dso object 442 * @machine: machine object 443 * 444 * External interface to find dso's file, open it and 445 * returns file descriptor. 446 */ 447int dso__data_fd(struct dso *dso, struct machine *machine) 448{ 449 enum dso_binary_type binary_type_data[] = { 450 DSO_BINARY_TYPE__BUILD_ID_CACHE, 451 DSO_BINARY_TYPE__SYSTEM_PATH_DSO, 452 DSO_BINARY_TYPE__NOT_FOUND, 453 }; 454 int i = 0; 455 456 if (dso->data.status == DSO_DATA_STATUS_ERROR) 457 return -1; 458 459 if (dso->data.fd >= 0) 460 goto out; 461 462 if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { 463 dso->data.fd = open_dso(dso, machine); 464 goto out; 465 } 466 467 do { 468 dso->binary_type = binary_type_data[i++]; 469 470 dso->data.fd = open_dso(dso, machine); 471 if (dso->data.fd >= 0) 472 goto out; 473 474 } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); 475out: 476 if (dso->data.fd >= 0) 477 dso->data.status = DSO_DATA_STATUS_OK; 478 else 479 dso->data.status = DSO_DATA_STATUS_ERROR; 480 481 return dso->data.fd; 482} 483 484bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) 485{ 486 u32 flag = 1 << by; 487 488 if (dso->data.status_seen & flag) 489 return true; 490 491 dso->data.status_seen |= flag; 492 493 return false; 494} 495 496static void 497dso_cache__free(struct rb_root *root) 498{ 499 struct rb_node *next = rb_first(root); 500 501 while (next) { 502 struct dso_cache *cache; 503 504 cache = rb_entry(next, struct dso_cache, rb_node); 505 next = rb_next(&cache->rb_node); 506 rb_erase(&cache->rb_node, root); 507 free(cache); 508 } 509} 510 511static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset) 512{ 513 struct rb_node * const *p = &root->rb_node; 514 const struct rb_node *parent = NULL; 515 struct dso_cache *cache; 516 517 while (*p != NULL) { 518 u64 end; 519 520 parent = *p; 521 cache = rb_entry(parent, struct dso_cache, rb_node); 522 end = cache->offset + DSO__DATA_CACHE_SIZE; 523 524 if (offset < cache->offset) 525 p = &(*p)->rb_left; 526 else if (offset >= end) 527 p = &(*p)->rb_right; 528 else 529 return cache; 530 } 531 return NULL; 532} 533 534static void 535dso_cache__insert(struct rb_root *root, struct dso_cache *new) 536{ 537 struct rb_node **p = &root->rb_node; 538 struct rb_node *parent = NULL; 539 struct dso_cache *cache; 540 u64 offset = new->offset; 541 542 while (*p != NULL) { 543 u64 end; 544 545 parent = *p; 546 cache = rb_entry(parent, struct dso_cache, rb_node); 547 end = cache->offset + DSO__DATA_CACHE_SIZE; 548 549 if (offset < cache->offset) 550 p = &(*p)->rb_left; 551 else if (offset >= end) 552 p = &(*p)->rb_right; 553 } 554 555 rb_link_node(&new->rb_node, parent, p); 556 rb_insert_color(&new->rb_node, root); 557} 558 559static ssize_t 560dso_cache__memcpy(struct dso_cache *cache, u64 offset, 561 u8 *data, u64 size) 562{ 563 u64 cache_offset = offset - cache->offset; 564 u64 cache_size = min(cache->size - cache_offset, size); 565 566 memcpy(data, cache->data + cache_offset, cache_size); 567 return cache_size; 568} 569 570static ssize_t 571dso_cache__read(struct dso *dso, u64 offset, u8 *data, ssize_t size) 572{ 573 struct dso_cache *cache; 574 ssize_t ret; 575 576 do { 577 u64 cache_offset; 578 579 ret = -ENOMEM; 580 581 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); 582 if (!cache) 583 break; 584 585 cache_offset = offset & DSO__DATA_CACHE_MASK; 586 587 ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); 588 if (ret <= 0) 589 break; 590 591 cache->offset = cache_offset; 592 cache->size = ret; 593 dso_cache__insert(&dso->data.cache, cache); 594 595 ret = dso_cache__memcpy(cache, offset, data, size); 596 597 } while (0); 598 599 if (ret <= 0) 600 free(cache); 601 602 return ret; 603} 604 605static ssize_t dso_cache_read(struct dso *dso, u64 offset, 606 u8 *data, ssize_t size) 607{ 608 struct dso_cache *cache; 609 610 cache = dso_cache__find(&dso->data.cache, offset); 611 if (cache) 612 return dso_cache__memcpy(cache, offset, data, size); 613 else 614 return dso_cache__read(dso, offset, data, size); 615} 616 617/* 618 * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks 619 * in the rb_tree. Any read to already cached data is served 620 * by cached data. 621 */ 622static ssize_t cached_read(struct dso *dso, u64 offset, u8 *data, ssize_t size) 623{ 624 ssize_t r = 0; 625 u8 *p = data; 626 627 do { 628 ssize_t ret; 629 630 ret = dso_cache_read(dso, offset, p, size); 631 if (ret < 0) 632 return ret; 633 634 /* Reached EOF, return what we have. */ 635 if (!ret) 636 break; 637 638 BUG_ON(ret > size); 639 640 r += ret; 641 p += ret; 642 offset += ret; 643 size -= ret; 644 645 } while (size); 646 647 return r; 648} 649 650static int data_file_size(struct dso *dso) 651{ 652 struct stat st; 653 char sbuf[STRERR_BUFSIZE]; 654 655 if (!dso->data.file_size) { 656 if (fstat(dso->data.fd, &st)) { 657 pr_err("dso mmap failed, fstat: %s\n", 658 strerror_r(errno, sbuf, sizeof(sbuf))); 659 return -1; 660 } 661 dso->data.file_size = st.st_size; 662 } 663 664 return 0; 665} 666 667/** 668 * dso__data_size - Return dso data size 669 * @dso: dso object 670 * @machine: machine object 671 * 672 * Return: dso data size 673 */ 674off_t dso__data_size(struct dso *dso, struct machine *machine) 675{ 676 int fd; 677 678 fd = dso__data_fd(dso, machine); 679 if (fd < 0) 680 return fd; 681 682 if (data_file_size(dso)) 683 return -1; 684 685 /* For now just estimate dso data size is close to file size */ 686 return dso->data.file_size; 687} 688 689static ssize_t data_read_offset(struct dso *dso, u64 offset, 690 u8 *data, ssize_t size) 691{ 692 if (data_file_size(dso)) 693 return -1; 694 695 /* Check the offset sanity. */ 696 if (offset > dso->data.file_size) 697 return -1; 698 699 if (offset + size < offset) 700 return -1; 701 702 return cached_read(dso, offset, data, size); 703} 704 705/** 706 * dso__data_read_offset - Read data from dso file offset 707 * @dso: dso object 708 * @machine: machine object 709 * @offset: file offset 710 * @data: buffer to store data 711 * @size: size of the @data buffer 712 * 713 * External interface to read data from dso file offset. Open 714 * dso data file and use cached_read to get the data. 715 */ 716ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, 717 u64 offset, u8 *data, ssize_t size) 718{ 719 if (dso__data_fd(dso, machine) < 0) 720 return -1; 721 722 return data_read_offset(dso, offset, data, size); 723} 724 725/** 726 * dso__data_read_addr - Read data from dso address 727 * @dso: dso object 728 * @machine: machine object 729 * @add: virtual memory address 730 * @data: buffer to store data 731 * @size: size of the @data buffer 732 * 733 * External interface to read data from dso address. 734 */ 735ssize_t dso__data_read_addr(struct dso *dso, struct map *map, 736 struct machine *machine, u64 addr, 737 u8 *data, ssize_t size) 738{ 739 u64 offset = map->map_ip(map, addr); 740 return dso__data_read_offset(dso, machine, offset, data, size); 741} 742 743struct map *dso__new_map(const char *name) 744{ 745 struct map *map = NULL; 746 struct dso *dso = dso__new(name); 747 748 if (dso) 749 map = map__new2(0, dso, MAP__FUNCTION); 750 751 return map; 752} 753 754struct dso *dso__kernel_findnew(struct machine *machine, const char *name, 755 const char *short_name, int dso_type) 756{ 757 /* 758 * The kernel dso could be created by build_id processing. 759 */ 760 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); 761 762 /* 763 * We need to run this in all cases, since during the build_id 764 * processing we had no idea this was the kernel dso. 765 */ 766 if (dso != NULL) { 767 dso__set_short_name(dso, short_name, false); 768 dso->kernel = dso_type; 769 } 770 771 return dso; 772} 773 774/* 775 * Find a matching entry and/or link current entry to RB tree. 776 * Either one of the dso or name parameter must be non-NULL or the 777 * function will not work. 778 */ 779static struct dso *dso__findlink_by_longname(struct rb_root *root, 780 struct dso *dso, const char *name) 781{ 782 struct rb_node **p = &root->rb_node; 783 struct rb_node *parent = NULL; 784 785 if (!name) 786 name = dso->long_name; 787 /* 788 * Find node with the matching name 789 */ 790 while (*p) { 791 struct dso *this = rb_entry(*p, struct dso, rb_node); 792 int rc = strcmp(name, this->long_name); 793 794 parent = *p; 795 if (rc == 0) { 796 /* 797 * In case the new DSO is a duplicate of an existing 798 * one, print an one-time warning & put the new entry 799 * at the end of the list of duplicates. 800 */ 801 if (!dso || (dso == this)) 802 return this; /* Find matching dso */ 803 /* 804 * The core kernel DSOs may have duplicated long name. 805 * In this case, the short name should be different. 806 * Comparing the short names to differentiate the DSOs. 807 */ 808 rc = strcmp(dso->short_name, this->short_name); 809 if (rc == 0) { 810 pr_err("Duplicated dso name: %s\n", name); 811 return NULL; 812 } 813 } 814 if (rc < 0) 815 p = &parent->rb_left; 816 else 817 p = &parent->rb_right; 818 } 819 if (dso) { 820 /* Add new node and rebalance tree */ 821 rb_link_node(&dso->rb_node, parent, p); 822 rb_insert_color(&dso->rb_node, root); 823 } 824 return NULL; 825} 826 827static inline struct dso * 828dso__find_by_longname(const struct rb_root *root, const char *name) 829{ 830 return dso__findlink_by_longname((struct rb_root *)root, NULL, name); 831} 832 833void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) 834{ 835 if (name == NULL) 836 return; 837 838 if (dso->long_name_allocated) 839 free((char *)dso->long_name); 840 841 dso->long_name = name; 842 dso->long_name_len = strlen(name); 843 dso->long_name_allocated = name_allocated; 844} 845 846void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) 847{ 848 if (name == NULL) 849 return; 850 851 if (dso->short_name_allocated) 852 free((char *)dso->short_name); 853 854 dso->short_name = name; 855 dso->short_name_len = strlen(name); 856 dso->short_name_allocated = name_allocated; 857} 858 859static void dso__set_basename(struct dso *dso) 860{ 861 /* 862 * basename() may modify path buffer, so we must pass 863 * a copy. 864 */ 865 char *base, *lname = strdup(dso->long_name); 866 867 if (!lname) 868 return; 869 870 /* 871 * basename() may return a pointer to internal 872 * storage which is reused in subsequent calls 873 * so copy the result. 874 */ 875 base = strdup(basename(lname)); 876 877 free(lname); 878 879 if (!base) 880 return; 881 882 dso__set_short_name(dso, base, true); 883} 884 885int dso__name_len(const struct dso *dso) 886{ 887 if (!dso) 888 return strlen("[unknown]"); 889 if (verbose) 890 return dso->long_name_len; 891 892 return dso->short_name_len; 893} 894 895bool dso__loaded(const struct dso *dso, enum map_type type) 896{ 897 return dso->loaded & (1 << type); 898} 899 900bool dso__sorted_by_name(const struct dso *dso, enum map_type type) 901{ 902 return dso->sorted_by_name & (1 << type); 903} 904 905void dso__set_sorted_by_name(struct dso *dso, enum map_type type) 906{ 907 dso->sorted_by_name |= (1 << type); 908} 909 910struct dso *dso__new(const char *name) 911{ 912 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); 913 914 if (dso != NULL) { 915 int i; 916 strcpy(dso->name, name); 917 dso__set_long_name(dso, dso->name, false); 918 dso__set_short_name(dso, dso->name, false); 919 for (i = 0; i < MAP__NR_TYPES; ++i) 920 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; 921 dso->data.cache = RB_ROOT; 922 dso->data.fd = -1; 923 dso->data.status = DSO_DATA_STATUS_UNKNOWN; 924 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; 925 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; 926 dso->is_64_bit = (sizeof(void *) == 8); 927 dso->loaded = 0; 928 dso->rel = 0; 929 dso->sorted_by_name = 0; 930 dso->has_build_id = 0; 931 dso->has_srcline = 1; 932 dso->a2l_fails = 1; 933 dso->kernel = DSO_TYPE_USER; 934 dso->needs_swap = DSO_SWAP__UNSET; 935 RB_CLEAR_NODE(&dso->rb_node); 936 INIT_LIST_HEAD(&dso->node); 937 INIT_LIST_HEAD(&dso->data.open_entry); 938 } 939 940 return dso; 941} 942 943void dso__delete(struct dso *dso) 944{ 945 int i; 946 947 if (!RB_EMPTY_NODE(&dso->rb_node)) 948 pr_err("DSO %s is still in rbtree when being deleted!\n", 949 dso->long_name); 950 for (i = 0; i < MAP__NR_TYPES; ++i) 951 symbols__delete(&dso->symbols[i]); 952 953 if (dso->short_name_allocated) { 954 zfree((char **)&dso->short_name); 955 dso->short_name_allocated = false; 956 } 957 958 if (dso->long_name_allocated) { 959 zfree((char **)&dso->long_name); 960 dso->long_name_allocated = false; 961 } 962 963 dso__data_close(dso); 964 dso_cache__free(&dso->data.cache); 965 dso__free_a2l(dso); 966 zfree(&dso->symsrc_filename); 967 free(dso); 968} 969 970void dso__set_build_id(struct dso *dso, void *build_id) 971{ 972 memcpy(dso->build_id, build_id, sizeof(dso->build_id)); 973 dso->has_build_id = 1; 974} 975 976bool dso__build_id_equal(const struct dso *dso, u8 *build_id) 977{ 978 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; 979} 980 981void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) 982{ 983 char path[PATH_MAX]; 984 985 if (machine__is_default_guest(machine)) 986 return; 987 sprintf(path, "%s/sys/kernel/notes", machine->root_dir); 988 if (sysfs__read_build_id(path, dso->build_id, 989 sizeof(dso->build_id)) == 0) 990 dso->has_build_id = true; 991} 992 993int dso__kernel_module_get_build_id(struct dso *dso, 994 const char *root_dir) 995{ 996 char filename[PATH_MAX]; 997 /* 998 * kernel module short names are of the form "[module]" and 999 * we need just "module" here. 1000 */ 1001 const char *name = dso->short_name + 1; 1002 1003 snprintf(filename, sizeof(filename), 1004 "%s/sys/module/%.*s/notes/.note.gnu.build-id", 1005 root_dir, (int)strlen(name) - 1, name); 1006 1007 if (sysfs__read_build_id(filename, dso->build_id, 1008 sizeof(dso->build_id)) == 0) 1009 dso->has_build_id = true; 1010 1011 return 0; 1012} 1013 1014bool __dsos__read_build_ids(struct list_head *head, bool with_hits) 1015{ 1016 bool have_build_id = false; 1017 struct dso *pos; 1018 1019 list_for_each_entry(pos, head, node) { 1020 if (with_hits && !pos->hit) 1021 continue; 1022 if (pos->has_build_id) { 1023 have_build_id = true; 1024 continue; 1025 } 1026 if (filename__read_build_id(pos->long_name, pos->build_id, 1027 sizeof(pos->build_id)) > 0) { 1028 have_build_id = true; 1029 pos->has_build_id = true; 1030 } 1031 } 1032 1033 return have_build_id; 1034} 1035 1036void dsos__add(struct dsos *dsos, struct dso *dso) 1037{ 1038 list_add_tail(&dso->node, &dsos->head); 1039 dso__findlink_by_longname(&dsos->root, dso, NULL); 1040} 1041 1042struct dso *dsos__find(const struct dsos *dsos, const char *name, 1043 bool cmp_short) 1044{ 1045 struct dso *pos; 1046 1047 if (cmp_short) { 1048 list_for_each_entry(pos, &dsos->head, node) 1049 if (strcmp(pos->short_name, name) == 0) 1050 return pos; 1051 return NULL; 1052 } 1053 return dso__find_by_longname(&dsos->root, name); 1054} 1055 1056struct dso *dsos__addnew(struct dsos *dsos, const char *name) 1057{ 1058 struct dso *dso = dso__new(name); 1059 1060 if (dso != NULL) { 1061 dsos__add(dsos, dso); 1062 dso__set_basename(dso); 1063 } 1064 return dso; 1065} 1066 1067struct dso *__dsos__findnew(struct dsos *dsos, const char *name) 1068{ 1069 struct dso *dso = dsos__find(dsos, name, false); 1070 1071 return dso ? dso : dsos__addnew(dsos, name); 1072} 1073 1074size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, 1075 bool (skip)(struct dso *dso, int parm), int parm) 1076{ 1077 struct dso *pos; 1078 size_t ret = 0; 1079 1080 list_for_each_entry(pos, head, node) { 1081 if (skip && skip(pos, parm)) 1082 continue; 1083 ret += dso__fprintf_buildid(pos, fp); 1084 ret += fprintf(fp, " %s\n", pos->long_name); 1085 } 1086 return ret; 1087} 1088 1089size_t __dsos__fprintf(struct list_head *head, FILE *fp) 1090{ 1091 struct dso *pos; 1092 size_t ret = 0; 1093 1094 list_for_each_entry(pos, head, node) { 1095 int i; 1096 for (i = 0; i < MAP__NR_TYPES; ++i) 1097 ret += dso__fprintf(pos, i, fp); 1098 } 1099 1100 return ret; 1101} 1102 1103size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) 1104{ 1105 char sbuild_id[BUILD_ID_SIZE * 2 + 1]; 1106 1107 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); 1108 return fprintf(fp, "%s", sbuild_id); 1109} 1110 1111size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) 1112{ 1113 struct rb_node *nd; 1114 size_t ret = fprintf(fp, "dso: %s (", dso->short_name); 1115 1116 if (dso->short_name != dso->long_name) 1117 ret += fprintf(fp, "%s, ", dso->long_name); 1118 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], 1119 dso__loaded(dso, type) ? "" : "NOT "); 1120 ret += dso__fprintf_buildid(dso, fp); 1121 ret += fprintf(fp, ")\n"); 1122 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { 1123 struct symbol *pos = rb_entry(nd, struct symbol, rb_node); 1124 ret += symbol__fprintf(pos, fp); 1125 } 1126 1127 return ret; 1128} 1129 1130enum dso_type dso__type(struct dso *dso, struct machine *machine) 1131{ 1132 int fd; 1133 1134 fd = dso__data_fd(dso, machine); 1135 if (fd < 0) 1136 return DSO__TYPE_UNKNOWN; 1137 1138 return dso__type_fd(fd); 1139} 1140 1141int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) 1142{ 1143 int idx, errnum = dso->load_errno; 1144 /* 1145 * This must have a same ordering as the enum dso_load_errno. 1146 */ 1147 static const char *dso_load__error_str[] = { 1148 "Internal tools/perf/ library error", 1149 "Invalid ELF file", 1150 "Can not read build id", 1151 "Mismatching build id", 1152 "Decompression failure", 1153 }; 1154 1155 BUG_ON(buflen == 0); 1156 1157 if (errnum >= 0) { 1158 const char *err = strerror_r(errnum, buf, buflen); 1159 1160 if (err != buf) 1161 scnprintf(buf, buflen, "%s", err); 1162 1163 return 0; 1164 } 1165 1166 if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) 1167 return -1; 1168 1169 idx = errnum - __DSO_LOAD_ERRNO__START; 1170 scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); 1171 return 0; 1172} 1173