tools/perf/util/dso.c

   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
  10 char 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__GUEST_KALLSYMS]               = 'g',
  25                 [DSO_BINARY_TYPE__GUEST_KMODULE]                = 'G',
  26                 [DSO_BINARY_TYPE__GUEST_VMLINUX]                = 'V',
  27         };
  28
  29         if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
  30                 return '!';
  31         return origin[dso->symtab_type];
  32 }
  33
  34 int dso__read_binary_type_filename(const struct dso *dso,
  35                                    enum dso_binary_type type,
  36                                    char *root_dir, char *filename, size_t size)
  37 {
  38         char build_id_hex[BUILD_ID_SIZE * 2 + 1];
  39         int ret = 0;
  40
  41         switch (type) {
  42         case DSO_BINARY_TYPE__DEBUGLINK: {
  43                 char *debuglink;
  44
  45                 strncpy(filename, dso->long_name, size);
  46                 debuglink = filename + dso->long_name_len;
  47                 while (debuglink != filename && *debuglink != '/')
  48                         debuglink--;
  49                 if (*debuglink == '/')
  50                         debuglink++;
  51                 ret = filename__read_debuglink(dso->long_name, debuglink,
  52                                                size - (debuglink - filename));
  53                 }
  54                 break;
  55         case DSO_BINARY_TYPE__BUILD_ID_CACHE:
  56                 /* skip the locally configured cache if a symfs is given */
  57                 if (symbol_conf.symfs[0] ||
  58                     (dso__build_id_filename(dso, filename, size) == NULL))
  59                         ret = -1;
  60                 break;
  61
  62         case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
  63                 snprintf(filename, size, "%s/usr/lib/debug%s.debug",
  64                          symbol_conf.symfs, dso->long_name);
  65                 break;
  66
  67         case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
  68                 snprintf(filename, size, "%s/usr/lib/debug%s",
  69                          symbol_conf.symfs, dso->long_name);
  70                 break;
  71
  72         case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
  73         {
  74                 const char *last_slash;
  75                 size_t len;
  76                 size_t dir_size;
  77
  78                 last_slash = dso->long_name + dso->long_name_len;
  79                 while (last_slash != dso->long_name && *last_slash != '/')
  80                         last_slash--;
  81
  82                 len = scnprintf(filename, size, "%s", symbol_conf.symfs);
  83                 dir_size = last_slash - dso->long_name + 2;
  84                 if (dir_size > (size - len)) {
  85                         ret = -1;
  86                         break;
  87                 }
  88                 len += scnprintf(filename + len, dir_size, "%s",  dso->long_name);
  89                 len += scnprintf(filename + len , size - len, ".debug%s",
  90                                                                 last_slash);
  91                 break;
  92         }
  93
  94         case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
  95                 if (!dso->has_build_id) {
  96                         ret = -1;
  97                         break;
  98                 }
  99
 100                 build_id__sprintf(dso->build_id,
 101                                   sizeof(dso->build_id),
 102                                   build_id_hex);
 103                 snprintf(filename, size,
 104                          "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
 105                          symbol_conf.symfs, build_id_hex, build_id_hex + 2);
 106                 break;
 107
 108         case DSO_BINARY_TYPE__VMLINUX:
 109         case DSO_BINARY_TYPE__GUEST_VMLINUX:
 110         case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
 111                 snprintf(filename, size, "%s%s",
 112                          symbol_conf.symfs, dso->long_name);
 113                 break;
 114
 115         case DSO_BINARY_TYPE__GUEST_KMODULE:
 116                 snprintf(filename, size, "%s%s%s", symbol_conf.symfs,
 117                          root_dir, dso->long_name);
 118                 break;
 119
 120         case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
 121                 snprintf(filename, size, "%s%s", symbol_conf.symfs,
 122                          dso->long_name);
 123                 break;
 124
 125         case DSO_BINARY_TYPE__KCORE:
 126         case DSO_BINARY_TYPE__GUEST_KCORE:
 127                 snprintf(filename, size, "%s", dso->long_name);
 128                 break;
 129
 130         default:
 131         case DSO_BINARY_TYPE__KALLSYMS:
 132         case DSO_BINARY_TYPE__GUEST_KALLSYMS:
 133         case DSO_BINARY_TYPE__JAVA_JIT:
 134         case DSO_BINARY_TYPE__NOT_FOUND:
 135                 ret = -1;
 136                 break;
 137         }
 138
 139         return ret;
 140 }
 141
 142 /*
 143  * Global list of open DSOs and the counter.
 144  */
 145 static LIST_HEAD(dso__data_open);
 146 static long dso__data_open_cnt;
 147
 148 static void dso__list_add(struct dso *dso)
 149 {
 150         list_add_tail(&dso->data.open_entry, &dso__data_open);
 151         dso__data_open_cnt++;
 152 }
 153
 154 static void dso__list_del(struct dso *dso)
 155 {
 156         list_del(&dso->data.open_entry);
 157         WARN_ONCE(dso__data_open_cnt <= 0,
 158                   "DSO data fd counter out of bounds.");
 159         dso__data_open_cnt--;
 160 }
 161
 162 static void close_first_dso(void);
 163
 164 static int do_open(char *name)
 165 {
 166         int fd;
 167
 168         do {
 169                 fd = open(name, O_RDONLY);
 170                 if (fd >= 0)
 171                         return fd;
 172
 173                 pr_debug("dso open failed, mmap: %s\n", strerror(errno));
 174                 if (!dso__data_open_cnt || errno != EMFILE)
 175                         break;
 176
 177                 close_first_dso();
 178         } while (1);
 179
 180         return -1;
 181 }
 182
 183 static int __open_dso(struct dso *dso, struct machine *machine)
 184 {
 185         int fd;
 186         char *root_dir = (char *)"";
 187         char *name = malloc(PATH_MAX);
 188
 189         if (!name)
 190                 return -ENOMEM;
 191
 192         if (machine)
 193                 root_dir = machine->root_dir;
 194
 195         if (dso__read_binary_type_filename(dso, dso->binary_type,
 196                                             root_dir, name, PATH_MAX)) {
 197                 free(name);
 198                 return -EINVAL;
 199         }
 200
 201         fd = do_open(name);
 202         free(name);
 203         return fd;
 204 }
 205
 206 static void check_data_close(void);
 207
 208 /**
 209  * dso_close - Open DSO data file
 210  * @dso: dso object
 211  *
 212  * Open @dso's data file descriptor and updates
 213  * list/count of open DSO objects.
 214  */
 215 static int open_dso(struct dso *dso, struct machine *machine)
 216 {
 217         int fd = __open_dso(dso, machine);
 218
 219         if (fd >= 0) {
 220                 dso__list_add(dso);
 221                 /*
 222                  * Check if we crossed the allowed number
 223                  * of opened DSOs and close one if needed.
 224                  */
 225                 check_data_close();
 226         }
 227
 228         return fd;
 229 }
 230
 231 static void close_data_fd(struct dso *dso)
 232 {
 233         if (dso->data.fd >= 0) {
 234                 close(dso->data.fd);
 235                 dso->data.fd = -1;
 236                 dso->data.file_size = 0;
 237                 dso__list_del(dso);
 238         }
 239 }
 240
 241 /**
 242  * dso_close - Close DSO data file
 243  * @dso: dso object
 244  *
 245  * Close @dso's data file descriptor and updates
 246  * list/count of open DSO objects.
 247  */
 248 static void close_dso(struct dso *dso)
 249 {
 250         close_data_fd(dso);
 251 }
 252
 253 static void close_first_dso(void)
 254 {
 255         struct dso *dso;
 256
 257         dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
 258         close_dso(dso);
 259 }
 260
 261 static rlim_t get_fd_limit(void)
 262 {
 263         struct rlimit l;
 264         rlim_t limit = 0;
 265
 266         /* Allow half of the current open fd limit. */
 267         if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
 268                 if (l.rlim_cur == RLIM_INFINITY)
 269                         limit = l.rlim_cur;
 270                 else
 271                         limit = l.rlim_cur / 2;
 272         } else {
 273                 pr_err("failed to get fd limit\n");
 274                 limit = 1;
 275         }
 276
 277         return limit;
 278 }
 279
 280 static bool may_cache_fd(void)
 281 {
 282         static rlim_t limit;
 283
 284         if (!limit)
 285                 limit = get_fd_limit();
 286
 287         if (limit == RLIM_INFINITY)
 288                 return true;
 289
 290         return limit > (rlim_t) dso__data_open_cnt;
 291 }
 292
 293 /*
 294  * Check and close LRU dso if we crossed allowed limit
 295  * for opened dso file descriptors. The limit is half
 296  * of the RLIMIT_NOFILE files opened.
 297 */
 298 static void check_data_close(void)
 299 {
 300         bool cache_fd = may_cache_fd();
 301
 302         if (!cache_fd)
 303                 close_first_dso();
 304 }
 305
 306 /**
 307  * dso__data_close - Close DSO data file
 308  * @dso: dso object
 309  *
 310  * External interface to close @dso's data file descriptor.
 311  */
 312 void dso__data_close(struct dso *dso)
 313 {
 314         close_dso(dso);
 315 }
 316
 317 /**
 318  * dso__data_fd - Get dso's data file descriptor
 319  * @dso: dso object
 320  * @machine: machine object
 321  *
 322  * External interface to find dso's file, open it and
 323  * returns file descriptor.
 324  */
 325 int dso__data_fd(struct dso *dso, struct machine *machine)
 326 {
 327         enum dso_binary_type binary_type_data[] = {
 328                 DSO_BINARY_TYPE__BUILD_ID_CACHE,
 329                 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
 330                 DSO_BINARY_TYPE__NOT_FOUND,
 331         };
 332         int i = 0;
 333
 334         if (dso->data.status == DSO_DATA_STATUS_ERROR)
 335                 return -1;
 336
 337         if (dso->data.fd >= 0)
 338                 goto out;
 339
 340         if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
 341                 dso->data.fd = open_dso(dso, machine);
 342                 goto out;
 343         }
 344
 345         do {
 346                 dso->binary_type = binary_type_data[i++];
 347
 348                 dso->data.fd = open_dso(dso, machine);
 349                 if (dso->data.fd >= 0)
 350                         goto out;
 351
 352         } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
 353 out:
 354         if (dso->data.fd >= 0)
 355                 dso->data.status = DSO_DATA_STATUS_OK;
 356         else
 357                 dso->data.status = DSO_DATA_STATUS_ERROR;
 358
 359         return dso->data.fd;
 360 }
 361
 362 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
 363 {
 364         u32 flag = 1 << by;
 365
 366         if (dso->data.status_seen & flag)
 367                 return true;
 368
 369         dso->data.status_seen |= flag;
 370
 371         return false;
 372 }
 373
 374 static void
 375 dso_cache__free(struct rb_root *root)
 376 {
 377         struct rb_node *next = rb_first(root);
 378
 379         while (next) {
 380                 struct dso_cache *cache;
 381
 382                 cache = rb_entry(next, struct dso_cache, rb_node);
 383                 next = rb_next(&cache->rb_node);
 384                 rb_erase(&cache->rb_node, root);
 385                 free(cache);
 386         }
 387 }
 388
 389 static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset)
 390 {
 391         struct rb_node * const *p = &root->rb_node;
 392         const struct rb_node *parent = NULL;
 393         struct dso_cache *cache;
 394
 395         while (*p != NULL) {
 396                 u64 end;
 397
 398                 parent = *p;
 399                 cache = rb_entry(parent, struct dso_cache, rb_node);
 400                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 401
 402                 if (offset < cache->offset)
 403                         p = &(*p)->rb_left;
 404                 else if (offset >= end)
 405                         p = &(*p)->rb_right;
 406                 else
 407                         return cache;
 408         }
 409         return NULL;
 410 }
 411
 412 static void
 413 dso_cache__insert(struct rb_root *root, struct dso_cache *new)
 414 {
 415         struct rb_node **p = &root->rb_node;
 416         struct rb_node *parent = NULL;
 417         struct dso_cache *cache;
 418         u64 offset = new->offset;
 419
 420         while (*p != NULL) {
 421                 u64 end;
 422
 423                 parent = *p;
 424                 cache = rb_entry(parent, struct dso_cache, rb_node);
 425                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 426
 427                 if (offset < cache->offset)
 428                         p = &(*p)->rb_left;
 429                 else if (offset >= end)
 430                         p = &(*p)->rb_right;
 431         }
 432
 433         rb_link_node(&new->rb_node, parent, p);
 434         rb_insert_color(&new->rb_node, root);
 435 }
 436
 437 static ssize_t
 438 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
 439                   u8 *data, u64 size)
 440 {
 441         u64 cache_offset = offset - cache->offset;
 442         u64 cache_size   = min(cache->size - cache_offset, size);
 443
 444         memcpy(data, cache->data + cache_offset, cache_size);
 445         return cache_size;
 446 }
 447
 448 static ssize_t
 449 dso_cache__read(struct dso *dso, u64 offset, u8 *data, ssize_t size)
 450 {
 451         struct dso_cache *cache;
 452         ssize_t ret;
 453
 454         do {
 455                 u64 cache_offset;
 456
 457                 ret = -ENOMEM;
 458
 459                 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
 460                 if (!cache)
 461                         break;
 462
 463                 cache_offset = offset & DSO__DATA_CACHE_MASK;
 464                 ret = -EINVAL;
 465
 466                 if (-1 == lseek(dso->data.fd, cache_offset, SEEK_SET))
 467                         break;
 468
 469                 ret = read(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE);
 470                 if (ret <= 0)
 471                         break;
 472
 473                 cache->offset = cache_offset;
 474                 cache->size   = ret;
 475                 dso_cache__insert(&dso->data.cache, cache);
 476
 477                 ret = dso_cache__memcpy(cache, offset, data, size);
 478
 479         } while (0);
 480
 481         if (ret <= 0)
 482                 free(cache);
 483
 484         return ret;
 485 }
 486
 487 static ssize_t dso_cache_read(struct dso *dso, u64 offset,
 488                               u8 *data, ssize_t size)
 489 {
 490         struct dso_cache *cache;
 491
 492         cache = dso_cache__find(&dso->data.cache, offset);
 493         if (cache)
 494                 return dso_cache__memcpy(cache, offset, data, size);
 495         else
 496                 return dso_cache__read(dso, offset, data, size);
 497 }
 498
 499 /*
 500  * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
 501  * in the rb_tree. Any read to already cached data is served
 502  * by cached data.
 503  */
 504 static ssize_t cached_read(struct dso *dso, u64 offset, u8 *data, ssize_t size)
 505 {
 506         ssize_t r = 0;
 507         u8 *p = data;
 508
 509         do {
 510                 ssize_t ret;
 511
 512                 ret = dso_cache_read(dso, offset, p, size);
 513                 if (ret < 0)
 514                         return ret;
 515
 516                 /* Reached EOF, return what we have. */
 517                 if (!ret)
 518                         break;
 519
 520                 BUG_ON(ret > size);
 521
 522                 r      += ret;
 523                 p      += ret;
 524                 offset += ret;
 525                 size   -= ret;
 526
 527         } while (size);
 528
 529         return r;
 530 }
 531
 532 static int data_file_size(struct dso *dso)
 533 {
 534         struct stat st;
 535
 536         if (!dso->data.file_size) {
 537                 if (fstat(dso->data.fd, &st)) {
 538                         pr_err("dso mmap failed, fstat: %s\n", strerror(errno));
 539                         return -1;
 540                 }
 541                 dso->data.file_size = st.st_size;
 542         }
 543
 544         return 0;
 545 }
 546
 547 /**
 548  * dso__data_size - Return dso data size
 549  * @dso: dso object
 550  * @machine: machine object
 551  *
 552  * Return: dso data size
 553  */
 554 off_t dso__data_size(struct dso *dso, struct machine *machine)
 555 {
 556         int fd;
 557
 558         fd = dso__data_fd(dso, machine);
 559         if (fd < 0)
 560                 return fd;
 561
 562         if (data_file_size(dso))
 563                 return -1;
 564
 565         /* For now just estimate dso data size is close to file size */
 566         return dso->data.file_size;
 567 }
 568
 569 static ssize_t data_read_offset(struct dso *dso, u64 offset,
 570                                 u8 *data, ssize_t size)
 571 {
 572         if (data_file_size(dso))
 573                 return -1;
 574
 575         /* Check the offset sanity. */
 576         if (offset > dso->data.file_size)
 577                 return -1;
 578
 579         if (offset + size < offset)
 580                 return -1;
 581
 582         return cached_read(dso, offset, data, size);
 583 }
 584
 585 /**
 586  * dso__data_read_offset - Read data from dso file offset
 587  * @dso: dso object
 588  * @machine: machine object
 589  * @offset: file offset
 590  * @data: buffer to store data
 591  * @size: size of the @data buffer
 592  *
 593  * External interface to read data from dso file offset. Open
 594  * dso data file and use cached_read to get the data.
 595  */
 596 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 597                               u64 offset, u8 *data, ssize_t size)
 598 {
 599         if (dso__data_fd(dso, machine) < 0)
 600                 return -1;
 601
 602         return data_read_offset(dso, offset, data, size);
 603 }
 604
 605 /**
 606  * dso__data_read_addr - Read data from dso address
 607  * @dso: dso object
 608  * @machine: machine object
 609  * @add: virtual memory address
 610  * @data: buffer to store data
 611  * @size: size of the @data buffer
 612  *
 613  * External interface to read data from dso address.
 614  */
 615 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
 616                             struct machine *machine, u64 addr,
 617                             u8 *data, ssize_t size)
 618 {
 619         u64 offset = map->map_ip(map, addr);
 620         return dso__data_read_offset(dso, machine, offset, data, size);
 621 }
 622
 623 struct map *dso__new_map(const char *name)
 624 {
 625         struct map *map = NULL;
 626         struct dso *dso = dso__new(name);
 627
 628         if (dso)
 629                 map = map__new2(0, dso, MAP__FUNCTION);
 630
 631         return map;
 632 }
 633
 634 struct dso *dso__kernel_findnew(struct machine *machine, const char *name,
 635                     const char *short_name, int dso_type)
 636 {
 637         /*
 638          * The kernel dso could be created by build_id processing.
 639          */
 640         struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
 641
 642         /*
 643          * We need to run this in all cases, since during the build_id
 644          * processing we had no idea this was the kernel dso.
 645          */
 646         if (dso != NULL) {
 647                 dso__set_short_name(dso, short_name, false);
 648                 dso->kernel = dso_type;
 649         }
 650
 651         return dso;
 652 }
 653
 654 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
 655 {
 656         if (name == NULL)
 657                 return;
 658
 659         if (dso->long_name_allocated)
 660                 free((char *)dso->long_name);
 661
 662         dso->long_name           = name;
 663         dso->long_name_len       = strlen(name);
 664         dso->long_name_allocated = name_allocated;
 665 }
 666
 667 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
 668 {
 669         if (name == NULL)
 670                 return;
 671
 672         if (dso->short_name_allocated)
 673                 free((char *)dso->short_name);
 674
 675         dso->short_name           = name;
 676         dso->short_name_len       = strlen(name);
 677         dso->short_name_allocated = name_allocated;
 678 }
 679
 680 static void dso__set_basename(struct dso *dso)
 681 {
 682        /*
 683         * basename() may modify path buffer, so we must pass
 684         * a copy.
 685         */
 686        char *base, *lname = strdup(dso->long_name);
 687
 688        if (!lname)
 689                return;
 690
 691        /*
 692         * basename() may return a pointer to internal
 693         * storage which is reused in subsequent calls
 694         * so copy the result.
 695         */
 696        base = strdup(basename(lname));
 697
 698        free(lname);
 699
 700        if (!base)
 701                return;
 702
 703        dso__set_short_name(dso, base, true);
 704 }
 705
 706 int dso__name_len(const struct dso *dso)
 707 {
 708         if (!dso)
 709                 return strlen("[unknown]");
 710         if (verbose)
 711                 return dso->long_name_len;
 712
 713         return dso->short_name_len;
 714 }
 715
 716 bool dso__loaded(const struct dso *dso, enum map_type type)
 717 {
 718         return dso->loaded & (1 << type);
 719 }
 720
 721 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
 722 {
 723         return dso->sorted_by_name & (1 << type);
 724 }
 725
 726 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
 727 {
 728         dso->sorted_by_name |= (1 << type);
 729 }
 730
 731 struct dso *dso__new(const char *name)
 732 {
 733         struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
 734
 735         if (dso != NULL) {
 736                 int i;
 737                 strcpy(dso->name, name);
 738                 dso__set_long_name(dso, dso->name, false);
 739                 dso__set_short_name(dso, dso->name, false);
 740                 for (i = 0; i < MAP__NR_TYPES; ++i)
 741                         dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
 742                 dso->data.cache = RB_ROOT;
 743                 dso->data.fd = -1;
 744                 dso->data.status = DSO_DATA_STATUS_UNKNOWN;
 745                 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
 746                 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
 747                 dso->is_64_bit = (sizeof(void *) == 8);
 748                 dso->loaded = 0;
 749                 dso->rel = 0;
 750                 dso->sorted_by_name = 0;
 751                 dso->has_build_id = 0;
 752                 dso->has_srcline = 1;
 753                 dso->a2l_fails = 1;
 754                 dso->kernel = DSO_TYPE_USER;
 755                 dso->needs_swap = DSO_SWAP__UNSET;
 756                 INIT_LIST_HEAD(&dso->node);
 757                 INIT_LIST_HEAD(&dso->data.open_entry);
 758         }
 759
 760         return dso;
 761 }
 762
 763 void dso__delete(struct dso *dso)
 764 {
 765         int i;
 766         for (i = 0; i < MAP__NR_TYPES; ++i)
 767                 symbols__delete(&dso->symbols[i]);
 768
 769         if (dso->short_name_allocated) {
 770                 zfree((char **)&dso->short_name);
 771                 dso->short_name_allocated = false;
 772         }
 773
 774         if (dso->long_name_allocated) {
 775                 zfree((char **)&dso->long_name);
 776                 dso->long_name_allocated = false;
 777         }
 778
 779         dso__data_close(dso);
 780         dso_cache__free(&dso->data.cache);
 781         dso__free_a2l(dso);
 782         zfree(&dso->symsrc_filename);
 783         free(dso);
 784 }
 785
 786 void dso__set_build_id(struct dso *dso, void *build_id)
 787 {
 788         memcpy(dso->build_id, build_id, sizeof(dso->build_id));
 789         dso->has_build_id = 1;
 790 }
 791
 792 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
 793 {
 794         return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
 795 }
 796
 797 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
 798 {
 799         char path[PATH_MAX];
 800
 801         if (machine__is_default_guest(machine))
 802                 return;
 803         sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
 804         if (sysfs__read_build_id(path, dso->build_id,
 805                                  sizeof(dso->build_id)) == 0)
 806                 dso->has_build_id = true;
 807 }
 808
 809 int dso__kernel_module_get_build_id(struct dso *dso,
 810                                     const char *root_dir)
 811 {
 812         char filename[PATH_MAX];
 813         /*
 814          * kernel module short names are of the form "[module]" and
 815          * we need just "module" here.
 816          */
 817         const char *name = dso->short_name + 1;
 818
 819         snprintf(filename, sizeof(filename),
 820                  "%s/sys/module/%.*s/notes/.note.gnu.build-id",
 821                  root_dir, (int)strlen(name) - 1, name);
 822
 823         if (sysfs__read_build_id(filename, dso->build_id,
 824                                  sizeof(dso->build_id)) == 0)
 825                 dso->has_build_id = true;
 826
 827         return 0;
 828 }
 829
 830 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
 831 {
 832         bool have_build_id = false;
 833         struct dso *pos;
 834
 835         list_for_each_entry(pos, head, node) {
 836                 if (with_hits && !pos->hit)
 837                         continue;
 838                 if (pos->has_build_id) {
 839                         have_build_id = true;
 840                         continue;
 841                 }
 842                 if (filename__read_build_id(pos->long_name, pos->build_id,
 843                                             sizeof(pos->build_id)) > 0) {
 844                         have_build_id     = true;
 845                         pos->has_build_id = true;
 846                 }
 847         }
 848
 849         return have_build_id;
 850 }
 851
 852 void dsos__add(struct list_head *head, struct dso *dso)
 853 {
 854         list_add_tail(&dso->node, head);
 855 }
 856
 857 struct dso *dsos__find(const struct list_head *head, const char *name, bool cmp_short)
 858 {
 859         struct dso *pos;
 860
 861         if (cmp_short) {
 862                 list_for_each_entry(pos, head, node)
 863                         if (strcmp(pos->short_name, name) == 0)
 864                                 return pos;
 865                 return NULL;
 866         }
 867         list_for_each_entry(pos, head, node)
 868                 if (strcmp(pos->long_name, name) == 0)
 869                         return pos;
 870         return NULL;
 871 }
 872
 873 struct dso *__dsos__findnew(struct list_head *head, const char *name)
 874 {
 875         struct dso *dso = dsos__find(head, name, false);
 876
 877         if (!dso) {
 878                 dso = dso__new(name);
 879                 if (dso != NULL) {
 880                         dsos__add(head, dso);
 881                         dso__set_basename(dso);
 882                 }
 883         }
 884
 885         return dso;
 886 }
 887
 888 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
 889                                bool (skip)(struct dso *dso, int parm), int parm)
 890 {
 891         struct dso *pos;
 892         size_t ret = 0;
 893
 894         list_for_each_entry(pos, head, node) {
 895                 if (skip && skip(pos, parm))
 896                         continue;
 897                 ret += dso__fprintf_buildid(pos, fp);
 898                 ret += fprintf(fp, " %s\n", pos->long_name);
 899         }
 900         return ret;
 901 }
 902
 903 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
 904 {
 905         struct dso *pos;
 906         size_t ret = 0;
 907
 908         list_for_each_entry(pos, head, node) {
 909                 int i;
 910                 for (i = 0; i < MAP__NR_TYPES; ++i)
 911                         ret += dso__fprintf(pos, i, fp);
 912         }
 913
 914         return ret;
 915 }
 916
 917 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
 918 {
 919         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
 920
 921         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 922         return fprintf(fp, "%s", sbuild_id);
 923 }
 924
 925 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
 926 {
 927         struct rb_node *nd;
 928         size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
 929
 930         if (dso->short_name != dso->long_name)
 931                 ret += fprintf(fp, "%s, ", dso->long_name);
 932         ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
 933                        dso__loaded(dso, type) ? "" : "NOT ");
 934         ret += dso__fprintf_buildid(dso, fp);
 935         ret += fprintf(fp, ")\n");
 936         for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
 937                 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
 938                 ret += symbol__fprintf(pos, fp);
 939         }
 940
 941         return ret;
 942 }
 943
 944 enum dso_type dso__type(struct dso *dso, struct machine *machine)
 945 {
 946         int fd;
 947
 948         fd = dso__data_fd(dso, machine);
 949         if (fd < 0)
 950                 return DSO__TYPE_UNKNOWN;
 951
 952         return dso__type_fd(fd);
 953 }