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__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
  36 int 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                 strncpy(filename, dso->long_name, size);
  49                 debuglink = filename + dso->long_name_len;
  50                 while (debuglink != filename && *debuglink != '/')
  51                         debuglink--;
  52                 if (*debuglink == '/')
  53                         debuglink++;
  54                 ret = filename__read_debuglink(dso->long_name, 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
 144 static 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         { NULL, NULL },
 152 };
 153
 154 bool is_supported_compression(const char *ext)
 155 {
 156         unsigned i;
 157
 158         for (i = 0; compressions[i].fmt; i++) {
 159                 if (!strcmp(ext, compressions[i].fmt))
 160                         return true;
 161         }
 162         return false;
 163 }
 164
 165 bool is_kmodule_extension(const char *ext)
 166 {
 167         if (strncmp(ext, "ko", 2))
 168                 return false;
 169
 170         if (ext[2] == '\0' || (ext[2] == '.' && is_supported_compression(ext+3)))
 171                 return true;
 172
 173         return false;
 174 }
 175
 176 bool is_kernel_module(const char *pathname, bool *compressed)
 177 {
 178         const char *ext = strrchr(pathname, '.');
 179
 180         if (ext == NULL)
 181                 return false;
 182
 183         if (is_supported_compression(ext + 1)) {
 184                 if (compressed)
 185                         *compressed = true;
 186                 ext -= 3;
 187         } else if (compressed)
 188                 *compressed = false;
 189
 190         return is_kmodule_extension(ext + 1);
 191 }
 192
 193 bool decompress_to_file(const char *ext, const char *filename, int output_fd)
 194 {
 195         unsigned i;
 196
 197         for (i = 0; compressions[i].fmt; i++) {
 198                 if (!strcmp(ext, compressions[i].fmt))
 199                         return !compressions[i].decompress(filename,
 200                                                            output_fd);
 201         }
 202         return false;
 203 }
 204
 205 bool dso__needs_decompress(struct dso *dso)
 206 {
 207         return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
 208                 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
 209 }
 210
 211 /*
 212  * Global list of open DSOs and the counter.
 213  */
 214 static LIST_HEAD(dso__data_open);
 215 static long dso__data_open_cnt;
 216
 217 static void dso__list_add(struct dso *dso)
 218 {
 219         list_add_tail(&dso->data.open_entry, &dso__data_open);
 220         dso__data_open_cnt++;
 221 }
 222
 223 static void dso__list_del(struct dso *dso)
 224 {
 225         list_del(&dso->data.open_entry);
 226         WARN_ONCE(dso__data_open_cnt <= 0,
 227                   "DSO data fd counter out of bounds.");
 228         dso__data_open_cnt--;
 229 }
 230
 231 static void close_first_dso(void);
 232
 233 static int do_open(char *name)
 234 {
 235         int fd;
 236         char sbuf[STRERR_BUFSIZE];
 237
 238         do {
 239                 fd = open(name, O_RDONLY);
 240                 if (fd >= 0)
 241                         return fd;
 242
 243                 pr_debug("dso open failed, mmap: %s\n",
 244                          strerror_r(errno, sbuf, sizeof(sbuf)));
 245                 if (!dso__data_open_cnt || errno != EMFILE)
 246                         break;
 247
 248                 close_first_dso();
 249         } while (1);
 250
 251         return -1;
 252 }
 253
 254 static int __open_dso(struct dso *dso, struct machine *machine)
 255 {
 256         int fd;
 257         char *root_dir = (char *)"";
 258         char *name = malloc(PATH_MAX);
 259
 260         if (!name)
 261                 return -ENOMEM;
 262
 263         if (machine)
 264                 root_dir = machine->root_dir;
 265
 266         if (dso__read_binary_type_filename(dso, dso->binary_type,
 267                                             root_dir, name, PATH_MAX)) {
 268                 free(name);
 269                 return -EINVAL;
 270         }
 271
 272         fd = do_open(name);
 273         free(name);
 274         return fd;
 275 }
 276
 277 static void check_data_close(void);
 278
 279 /**
 280  * dso_close - Open DSO data file
 281  * @dso: dso object
 282  *
 283  * Open @dso's data file descriptor and updates
 284  * list/count of open DSO objects.
 285  */
 286 static int open_dso(struct dso *dso, struct machine *machine)
 287 {
 288         int fd = __open_dso(dso, machine);
 289
 290         if (fd >= 0) {
 291                 dso__list_add(dso);
 292                 /*
 293                  * Check if we crossed the allowed number
 294                  * of opened DSOs and close one if needed.
 295                  */
 296                 check_data_close();
 297         }
 298
 299         return fd;
 300 }
 301
 302 static void close_data_fd(struct dso *dso)
 303 {
 304         if (dso->data.fd >= 0) {
 305                 close(dso->data.fd);
 306                 dso->data.fd = -1;
 307                 dso->data.file_size = 0;
 308                 dso__list_del(dso);
 309         }
 310 }
 311
 312 /**
 313  * dso_close - Close DSO data file
 314  * @dso: dso object
 315  *
 316  * Close @dso's data file descriptor and updates
 317  * list/count of open DSO objects.
 318  */
 319 static void close_dso(struct dso *dso)
 320 {
 321         close_data_fd(dso);
 322 }
 323
 324 static void close_first_dso(void)
 325 {
 326         struct dso *dso;
 327
 328         dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
 329         close_dso(dso);
 330 }
 331
 332 static rlim_t get_fd_limit(void)
 333 {
 334         struct rlimit l;
 335         rlim_t limit = 0;
 336
 337         /* Allow half of the current open fd limit. */
 338         if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
 339                 if (l.rlim_cur == RLIM_INFINITY)
 340                         limit = l.rlim_cur;
 341                 else
 342                         limit = l.rlim_cur / 2;
 343         } else {
 344                 pr_err("failed to get fd limit\n");
 345                 limit = 1;
 346         }
 347
 348         return limit;
 349 }
 350
 351 static bool may_cache_fd(void)
 352 {
 353         static rlim_t limit;
 354
 355         if (!limit)
 356                 limit = get_fd_limit();
 357
 358         if (limit == RLIM_INFINITY)
 359                 return true;
 360
 361         return limit > (rlim_t) dso__data_open_cnt;
 362 }
 363
 364 /*
 365  * Check and close LRU dso if we crossed allowed limit
 366  * for opened dso file descriptors. The limit is half
 367  * of the RLIMIT_NOFILE files opened.
 368 */
 369 static void check_data_close(void)
 370 {
 371         bool cache_fd = may_cache_fd();
 372
 373         if (!cache_fd)
 374                 close_first_dso();
 375 }
 376
 377 /**
 378  * dso__data_close - Close DSO data file
 379  * @dso: dso object
 380  *
 381  * External interface to close @dso's data file descriptor.
 382  */
 383 void dso__data_close(struct dso *dso)
 384 {
 385         close_dso(dso);
 386 }
 387
 388 /**
 389  * dso__data_fd - Get dso's data file descriptor
 390  * @dso: dso object
 391  * @machine: machine object
 392  *
 393  * External interface to find dso's file, open it and
 394  * returns file descriptor.
 395  */
 396 int dso__data_fd(struct dso *dso, struct machine *machine)
 397 {
 398         enum dso_binary_type binary_type_data[] = {
 399                 DSO_BINARY_TYPE__BUILD_ID_CACHE,
 400                 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
 401                 DSO_BINARY_TYPE__NOT_FOUND,
 402         };
 403         int i = 0;
 404
 405         if (dso->data.status == DSO_DATA_STATUS_ERROR)
 406                 return -1;
 407
 408         if (dso->data.fd >= 0)
 409                 goto out;
 410
 411         if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
 412                 dso->data.fd = open_dso(dso, machine);
 413                 goto out;
 414         }
 415
 416         do {
 417                 dso->binary_type = binary_type_data[i++];
 418
 419                 dso->data.fd = open_dso(dso, machine);
 420                 if (dso->data.fd >= 0)
 421                         goto out;
 422
 423         } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
 424 out:
 425         if (dso->data.fd >= 0)
 426                 dso->data.status = DSO_DATA_STATUS_OK;
 427         else
 428                 dso->data.status = DSO_DATA_STATUS_ERROR;
 429
 430         return dso->data.fd;
 431 }
 432
 433 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
 434 {
 435         u32 flag = 1 << by;
 436
 437         if (dso->data.status_seen & flag)
 438                 return true;
 439
 440         dso->data.status_seen |= flag;
 441
 442         return false;
 443 }
 444
 445 static void
 446 dso_cache__free(struct rb_root *root)
 447 {
 448         struct rb_node *next = rb_first(root);
 449
 450         while (next) {
 451                 struct dso_cache *cache;
 452
 453                 cache = rb_entry(next, struct dso_cache, rb_node);
 454                 next = rb_next(&cache->rb_node);
 455                 rb_erase(&cache->rb_node, root);
 456                 free(cache);
 457         }
 458 }
 459
 460 static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset)
 461 {
 462         struct rb_node * const *p = &root->rb_node;
 463         const struct rb_node *parent = NULL;
 464         struct dso_cache *cache;
 465
 466         while (*p != NULL) {
 467                 u64 end;
 468
 469                 parent = *p;
 470                 cache = rb_entry(parent, struct dso_cache, rb_node);
 471                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 472
 473                 if (offset < cache->offset)
 474                         p = &(*p)->rb_left;
 475                 else if (offset >= end)
 476                         p = &(*p)->rb_right;
 477                 else
 478                         return cache;
 479         }
 480         return NULL;
 481 }
 482
 483 static void
 484 dso_cache__insert(struct rb_root *root, struct dso_cache *new)
 485 {
 486         struct rb_node **p = &root->rb_node;
 487         struct rb_node *parent = NULL;
 488         struct dso_cache *cache;
 489         u64 offset = new->offset;
 490
 491         while (*p != NULL) {
 492                 u64 end;
 493
 494                 parent = *p;
 495                 cache = rb_entry(parent, struct dso_cache, rb_node);
 496                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 497
 498                 if (offset < cache->offset)
 499                         p = &(*p)->rb_left;
 500                 else if (offset >= end)
 501                         p = &(*p)->rb_right;
 502         }
 503
 504         rb_link_node(&new->rb_node, parent, p);
 505         rb_insert_color(&new->rb_node, root);
 506 }
 507
 508 static ssize_t
 509 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
 510                   u8 *data, u64 size)
 511 {
 512         u64 cache_offset = offset - cache->offset;
 513         u64 cache_size   = min(cache->size - cache_offset, size);
 514
 515         memcpy(data, cache->data + cache_offset, cache_size);
 516         return cache_size;
 517 }
 518
 519 static ssize_t
 520 dso_cache__read(struct dso *dso, u64 offset, u8 *data, ssize_t size)
 521 {
 522         struct dso_cache *cache;
 523         ssize_t ret;
 524
 525         do {
 526                 u64 cache_offset;
 527
 528                 ret = -ENOMEM;
 529
 530                 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
 531                 if (!cache)
 532                         break;
 533
 534                 cache_offset = offset & DSO__DATA_CACHE_MASK;
 535                 ret = -EINVAL;
 536
 537                 if (-1 == lseek(dso->data.fd, cache_offset, SEEK_SET))
 538                         break;
 539
 540                 ret = read(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE);
 541                 if (ret <= 0)
 542                         break;
 543
 544                 cache->offset = cache_offset;
 545                 cache->size   = ret;
 546                 dso_cache__insert(&dso->data.cache, cache);
 547
 548                 ret = dso_cache__memcpy(cache, offset, data, size);
 549
 550         } while (0);
 551
 552         if (ret <= 0)
 553                 free(cache);
 554
 555         return ret;
 556 }
 557
 558 static ssize_t dso_cache_read(struct dso *dso, u64 offset,
 559                               u8 *data, ssize_t size)
 560 {
 561         struct dso_cache *cache;
 562
 563         cache = dso_cache__find(&dso->data.cache, offset);
 564         if (cache)
 565                 return dso_cache__memcpy(cache, offset, data, size);
 566         else
 567                 return dso_cache__read(dso, offset, data, size);
 568 }
 569
 570 /*
 571  * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
 572  * in the rb_tree. Any read to already cached data is served
 573  * by cached data.
 574  */
 575 static ssize_t cached_read(struct dso *dso, u64 offset, u8 *data, ssize_t size)
 576 {
 577         ssize_t r = 0;
 578         u8 *p = data;
 579
 580         do {
 581                 ssize_t ret;
 582
 583                 ret = dso_cache_read(dso, offset, p, size);
 584                 if (ret < 0)
 585                         return ret;
 586
 587                 /* Reached EOF, return what we have. */
 588                 if (!ret)
 589                         break;
 590
 591                 BUG_ON(ret > size);
 592
 593                 r      += ret;
 594                 p      += ret;
 595                 offset += ret;
 596                 size   -= ret;
 597
 598         } while (size);
 599
 600         return r;
 601 }
 602
 603 static int data_file_size(struct dso *dso)
 604 {
 605         struct stat st;
 606         char sbuf[STRERR_BUFSIZE];
 607
 608         if (!dso->data.file_size) {
 609                 if (fstat(dso->data.fd, &st)) {
 610                         pr_err("dso mmap failed, fstat: %s\n",
 611                                 strerror_r(errno, sbuf, sizeof(sbuf)));
 612                         return -1;
 613                 }
 614                 dso->data.file_size = st.st_size;
 615         }
 616
 617         return 0;
 618 }
 619
 620 /**
 621  * dso__data_size - Return dso data size
 622  * @dso: dso object
 623  * @machine: machine object
 624  *
 625  * Return: dso data size
 626  */
 627 off_t dso__data_size(struct dso *dso, struct machine *machine)
 628 {
 629         int fd;
 630
 631         fd = dso__data_fd(dso, machine);
 632         if (fd < 0)
 633                 return fd;
 634
 635         if (data_file_size(dso))
 636                 return -1;
 637
 638         /* For now just estimate dso data size is close to file size */
 639         return dso->data.file_size;
 640 }
 641
 642 static ssize_t data_read_offset(struct dso *dso, u64 offset,
 643                                 u8 *data, ssize_t size)
 644 {
 645         if (data_file_size(dso))
 646                 return -1;
 647
 648         /* Check the offset sanity. */
 649         if (offset > dso->data.file_size)
 650                 return -1;
 651
 652         if (offset + size < offset)
 653                 return -1;
 654
 655         return cached_read(dso, offset, data, size);
 656 }
 657
 658 /**
 659  * dso__data_read_offset - Read data from dso file offset
 660  * @dso: dso object
 661  * @machine: machine object
 662  * @offset: file offset
 663  * @data: buffer to store data
 664  * @size: size of the @data buffer
 665  *
 666  * External interface to read data from dso file offset. Open
 667  * dso data file and use cached_read to get the data.
 668  */
 669 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 670                               u64 offset, u8 *data, ssize_t size)
 671 {
 672         if (dso__data_fd(dso, machine) < 0)
 673                 return -1;
 674
 675         return data_read_offset(dso, offset, data, size);
 676 }
 677
 678 /**
 679  * dso__data_read_addr - Read data from dso address
 680  * @dso: dso object
 681  * @machine: machine object
 682  * @add: virtual memory address
 683  * @data: buffer to store data
 684  * @size: size of the @data buffer
 685  *
 686  * External interface to read data from dso address.
 687  */
 688 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
 689                             struct machine *machine, u64 addr,
 690                             u8 *data, ssize_t size)
 691 {
 692         u64 offset = map->map_ip(map, addr);
 693         return dso__data_read_offset(dso, machine, offset, data, size);
 694 }
 695
 696 struct map *dso__new_map(const char *name)
 697 {
 698         struct map *map = NULL;
 699         struct dso *dso = dso__new(name);
 700
 701         if (dso)
 702                 map = map__new2(0, dso, MAP__FUNCTION);
 703
 704         return map;
 705 }
 706
 707 struct dso *dso__kernel_findnew(struct machine *machine, const char *name,
 708                     const char *short_name, int dso_type)
 709 {
 710         /*
 711          * The kernel dso could be created by build_id processing.
 712          */
 713         struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
 714
 715         /*
 716          * We need to run this in all cases, since during the build_id
 717          * processing we had no idea this was the kernel dso.
 718          */
 719         if (dso != NULL) {
 720                 dso__set_short_name(dso, short_name, false);
 721                 dso->kernel = dso_type;
 722         }
 723
 724         return dso;
 725 }
 726
 727 /*
 728  * Find a matching entry and/or link current entry to RB tree.
 729  * Either one of the dso or name parameter must be non-NULL or the
 730  * function will not work.
 731  */
 732 static struct dso *dso__findlink_by_longname(struct rb_root *root,
 733                                              struct dso *dso, const char *name)
 734 {
 735         struct rb_node **p = &root->rb_node;
 736         struct rb_node  *parent = NULL;
 737
 738         if (!name)
 739                 name = dso->long_name;
 740         /*
 741          * Find node with the matching name
 742          */
 743         while (*p) {
 744                 struct dso *this = rb_entry(*p, struct dso, rb_node);
 745                 int rc = strcmp(name, this->long_name);
 746
 747                 parent = *p;
 748                 if (rc == 0) {
 749                         /*
 750                          * In case the new DSO is a duplicate of an existing
 751                          * one, print an one-time warning & put the new entry
 752                          * at the end of the list of duplicates.
 753                          */
 754                         if (!dso || (dso == this))
 755                                 return this;    /* Find matching dso */
 756                         /*
 757                          * The core kernel DSOs may have duplicated long name.
 758                          * In this case, the short name should be different.
 759                          * Comparing the short names to differentiate the DSOs.
 760                          */
 761                         rc = strcmp(dso->short_name, this->short_name);
 762                         if (rc == 0) {
 763                                 pr_err("Duplicated dso name: %s\n", name);
 764                                 return NULL;
 765                         }
 766                 }
 767                 if (rc < 0)
 768                         p = &parent->rb_left;
 769                 else
 770                         p = &parent->rb_right;
 771         }
 772         if (dso) {
 773                 /* Add new node and rebalance tree */
 774                 rb_link_node(&dso->rb_node, parent, p);
 775                 rb_insert_color(&dso->rb_node, root);
 776         }
 777         return NULL;
 778 }
 779
 780 static inline struct dso *
 781 dso__find_by_longname(const struct rb_root *root, const char *name)
 782 {
 783         return dso__findlink_by_longname((struct rb_root *)root, NULL, name);
 784 }
 785
 786 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
 787 {
 788         if (name == NULL)
 789                 return;
 790
 791         if (dso->long_name_allocated)
 792                 free((char *)dso->long_name);
 793
 794         dso->long_name           = name;
 795         dso->long_name_len       = strlen(name);
 796         dso->long_name_allocated = name_allocated;
 797 }
 798
 799 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
 800 {
 801         if (name == NULL)
 802                 return;
 803
 804         if (dso->short_name_allocated)
 805                 free((char *)dso->short_name);
 806
 807         dso->short_name           = name;
 808         dso->short_name_len       = strlen(name);
 809         dso->short_name_allocated = name_allocated;
 810 }
 811
 812 static void dso__set_basename(struct dso *dso)
 813 {
 814        /*
 815         * basename() may modify path buffer, so we must pass
 816         * a copy.
 817         */
 818        char *base, *lname = strdup(dso->long_name);
 819
 820        if (!lname)
 821                return;
 822
 823        /*
 824         * basename() may return a pointer to internal
 825         * storage which is reused in subsequent calls
 826         * so copy the result.
 827         */
 828        base = strdup(basename(lname));
 829
 830        free(lname);
 831
 832        if (!base)
 833                return;
 834
 835        dso__set_short_name(dso, base, true);
 836 }
 837
 838 int dso__name_len(const struct dso *dso)
 839 {
 840         if (!dso)
 841                 return strlen("[unknown]");
 842         if (verbose)
 843                 return dso->long_name_len;
 844
 845         return dso->short_name_len;
 846 }
 847
 848 bool dso__loaded(const struct dso *dso, enum map_type type)
 849 {
 850         return dso->loaded & (1 << type);
 851 }
 852
 853 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
 854 {
 855         return dso->sorted_by_name & (1 << type);
 856 }
 857
 858 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
 859 {
 860         dso->sorted_by_name |= (1 << type);
 861 }
 862
 863 struct dso *dso__new(const char *name)
 864 {
 865         struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
 866
 867         if (dso != NULL) {
 868                 int i;
 869                 strcpy(dso->name, name);
 870                 dso__set_long_name(dso, dso->name, false);
 871                 dso__set_short_name(dso, dso->name, false);
 872                 for (i = 0; i < MAP__NR_TYPES; ++i)
 873                         dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
 874                 dso->data.cache = RB_ROOT;
 875                 dso->data.fd = -1;
 876                 dso->data.status = DSO_DATA_STATUS_UNKNOWN;
 877                 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
 878                 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
 879                 dso->is_64_bit = (sizeof(void *) == 8);
 880                 dso->loaded = 0;
 881                 dso->rel = 0;
 882                 dso->sorted_by_name = 0;
 883                 dso->has_build_id = 0;
 884                 dso->has_srcline = 1;
 885                 dso->a2l_fails = 1;
 886                 dso->kernel = DSO_TYPE_USER;
 887                 dso->needs_swap = DSO_SWAP__UNSET;
 888                 RB_CLEAR_NODE(&dso->rb_node);
 889                 INIT_LIST_HEAD(&dso->node);
 890                 INIT_LIST_HEAD(&dso->data.open_entry);
 891         }
 892
 893         return dso;
 894 }
 895
 896 void dso__delete(struct dso *dso)
 897 {
 898         int i;
 899
 900         if (!RB_EMPTY_NODE(&dso->rb_node))
 901                 pr_err("DSO %s is still in rbtree when being deleted!\n",
 902                        dso->long_name);
 903         for (i = 0; i < MAP__NR_TYPES; ++i)
 904                 symbols__delete(&dso->symbols[i]);
 905
 906         if (dso->short_name_allocated) {
 907                 zfree((char **)&dso->short_name);
 908                 dso->short_name_allocated = false;
 909         }
 910
 911         if (dso->long_name_allocated) {
 912                 zfree((char **)&dso->long_name);
 913                 dso->long_name_allocated = false;
 914         }
 915
 916         dso__data_close(dso);
 917         dso_cache__free(&dso->data.cache);
 918         dso__free_a2l(dso);
 919         zfree(&dso->symsrc_filename);
 920         free(dso);
 921 }
 922
 923 void dso__set_build_id(struct dso *dso, void *build_id)
 924 {
 925         memcpy(dso->build_id, build_id, sizeof(dso->build_id));
 926         dso->has_build_id = 1;
 927 }
 928
 929 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
 930 {
 931         return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
 932 }
 933
 934 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
 935 {
 936         char path[PATH_MAX];
 937
 938         if (machine__is_default_guest(machine))
 939                 return;
 940         sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
 941         if (sysfs__read_build_id(path, dso->build_id,
 942                                  sizeof(dso->build_id)) == 0)
 943                 dso->has_build_id = true;
 944 }
 945
 946 int dso__kernel_module_get_build_id(struct dso *dso,
 947                                     const char *root_dir)
 948 {
 949         char filename[PATH_MAX];
 950         /*
 951          * kernel module short names are of the form "[module]" and
 952          * we need just "module" here.
 953          */
 954         const char *name = dso->short_name + 1;
 955
 956         snprintf(filename, sizeof(filename),
 957                  "%s/sys/module/%.*s/notes/.note.gnu.build-id",
 958                  root_dir, (int)strlen(name) - 1, name);
 959
 960         if (sysfs__read_build_id(filename, dso->build_id,
 961                                  sizeof(dso->build_id)) == 0)
 962                 dso->has_build_id = true;
 963
 964         return 0;
 965 }
 966
 967 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
 968 {
 969         bool have_build_id = false;
 970         struct dso *pos;
 971
 972         list_for_each_entry(pos, head, node) {
 973                 if (with_hits && !pos->hit)
 974                         continue;
 975                 if (pos->has_build_id) {
 976                         have_build_id = true;
 977                         continue;
 978                 }
 979                 if (filename__read_build_id(pos->long_name, pos->build_id,
 980                                             sizeof(pos->build_id)) > 0) {
 981                         have_build_id     = true;
 982                         pos->has_build_id = true;
 983                 }
 984         }
 985
 986         return have_build_id;
 987 }
 988
 989 void dsos__add(struct dsos *dsos, struct dso *dso)
 990 {
 991         list_add_tail(&dso->node, &dsos->head);
 992         dso__findlink_by_longname(&dsos->root, dso, NULL);
 993 }
 994
 995 struct dso *dsos__find(const struct dsos *dsos, const char *name,
 996                        bool cmp_short)
 997 {
 998         struct dso *pos;
 999
1000         if (cmp_short) {
1001                 list_for_each_entry(pos, &dsos->head, node)
1002                         if (strcmp(pos->short_name, name) == 0)
1003                                 return pos;
1004                 return NULL;
1005         }
1006         return dso__find_by_longname(&dsos->root, name);
1007 }
1008
1009 struct dso *__dsos__findnew(struct dsos *dsos, const char *name)
1010 {
1011         struct dso *dso = dsos__find(dsos, name, false);
1012
1013         if (!dso) {
1014                 dso = dso__new(name);
1015                 if (dso != NULL) {
1016                         dsos__add(dsos, dso);
1017                         dso__set_basename(dso);
1018                 }
1019         }
1020
1021         return dso;
1022 }
1023
1024 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
1025                                bool (skip)(struct dso *dso, int parm), int parm)
1026 {
1027         struct dso *pos;
1028         size_t ret = 0;
1029
1030         list_for_each_entry(pos, head, node) {
1031                 if (skip && skip(pos, parm))
1032                         continue;
1033                 ret += dso__fprintf_buildid(pos, fp);
1034                 ret += fprintf(fp, " %s\n", pos->long_name);
1035         }
1036         return ret;
1037 }
1038
1039 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1040 {
1041         struct dso *pos;
1042         size_t ret = 0;
1043
1044         list_for_each_entry(pos, head, node) {
1045                 int i;
1046                 for (i = 0; i < MAP__NR_TYPES; ++i)
1047                         ret += dso__fprintf(pos, i, fp);
1048         }
1049
1050         return ret;
1051 }
1052
1053 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
1054 {
1055         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
1056
1057         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1058         return fprintf(fp, "%s", sbuild_id);
1059 }
1060
1061 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
1062 {
1063         struct rb_node *nd;
1064         size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
1065
1066         if (dso->short_name != dso->long_name)
1067                 ret += fprintf(fp, "%s, ", dso->long_name);
1068         ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
1069                        dso__loaded(dso, type) ? "" : "NOT ");
1070         ret += dso__fprintf_buildid(dso, fp);
1071         ret += fprintf(fp, ")\n");
1072         for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
1073                 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
1074                 ret += symbol__fprintf(pos, fp);
1075         }
1076
1077         return ret;
1078 }
1079
1080 enum dso_type dso__type(struct dso *dso, struct machine *machine)
1081 {
1082         int fd;
1083
1084         fd = dso__data_fd(dso, machine);
1085         if (fd < 0)
1086                 return DSO__TYPE_UNKNOWN;
1087
1088         return dso__type_fd(fd);
1089 }