tools/perf/util/dso.c

   1 #include <asm/bug.h>
   2 #include "symbol.h"
   3 #include "dso.h"
   4 #include "machine.h"
   5 #include "util.h"
   6 #include "debug.h"
   7
   8 char dso__symtab_origin(const struct dso *dso)
   9 {
  10         static const char origin[] = {
  11                 [DSO_BINARY_TYPE__KALLSYMS]                     = 'k',
  12                 [DSO_BINARY_TYPE__VMLINUX]                      = 'v',
  13                 [DSO_BINARY_TYPE__JAVA_JIT]                     = 'j',
  14                 [DSO_BINARY_TYPE__DEBUGLINK]                    = 'l',
  15                 [DSO_BINARY_TYPE__BUILD_ID_CACHE]               = 'B',
  16                 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO]             = 'f',
  17                 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO]             = 'u',
  18                 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO]       = 'o',
  19                 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO]            = 'b',
  20                 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO]              = 'd',
  21                 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE]          = 'K',
  22                 [DSO_BINARY_TYPE__GUEST_KALLSYMS]               = 'g',
  23                 [DSO_BINARY_TYPE__GUEST_KMODULE]                = 'G',
  24                 [DSO_BINARY_TYPE__GUEST_VMLINUX]                = 'V',
  25         };
  26
  27         if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
  28                 return '!';
  29         return origin[dso->symtab_type];
  30 }
  31
  32 int dso__read_binary_type_filename(const struct dso *dso,
  33                                    enum dso_binary_type type,
  34                                    char *root_dir, char *filename, size_t size)
  35 {
  36         char build_id_hex[BUILD_ID_SIZE * 2 + 1];
  37         int ret = 0;
  38
  39         switch (type) {
  40         case DSO_BINARY_TYPE__DEBUGLINK: {
  41                 char *debuglink;
  42
  43                 strncpy(filename, dso->long_name, size);
  44                 debuglink = filename + dso->long_name_len;
  45                 while (debuglink != filename && *debuglink != '/')
  46                         debuglink--;
  47                 if (*debuglink == '/')
  48                         debuglink++;
  49                 ret = filename__read_debuglink(dso->long_name, debuglink,
  50                                                size - (debuglink - filename));
  51                 }
  52                 break;
  53         case DSO_BINARY_TYPE__BUILD_ID_CACHE:
  54                 /* skip the locally configured cache if a symfs is given */
  55                 if (symbol_conf.symfs[0] ||
  56                     (dso__build_id_filename(dso, filename, size) == NULL))
  57                         ret = -1;
  58                 break;
  59
  60         case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
  61                 snprintf(filename, size, "%s/usr/lib/debug%s.debug",
  62                          symbol_conf.symfs, dso->long_name);
  63                 break;
  64
  65         case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
  66                 snprintf(filename, size, "%s/usr/lib/debug%s",
  67                          symbol_conf.symfs, dso->long_name);
  68                 break;
  69
  70         case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
  71         {
  72                 const char *last_slash;
  73                 size_t len;
  74                 size_t dir_size;
  75
  76                 last_slash = dso->long_name + dso->long_name_len;
  77                 while (last_slash != dso->long_name && *last_slash != '/')
  78                         last_slash--;
  79
  80                 len = scnprintf(filename, size, "%s", symbol_conf.symfs);
  81                 dir_size = last_slash - dso->long_name + 2;
  82                 if (dir_size > (size - len)) {
  83                         ret = -1;
  84                         break;
  85                 }
  86                 len += scnprintf(filename + len, dir_size, "%s",  dso->long_name);
  87                 len += scnprintf(filename + len , size - len, ".debug%s",
  88                                                                 last_slash);
  89                 break;
  90         }
  91
  92         case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
  93                 if (!dso->has_build_id) {
  94                         ret = -1;
  95                         break;
  96                 }
  97
  98                 build_id__sprintf(dso->build_id,
  99                                   sizeof(dso->build_id),
 100                                   build_id_hex);
 101                 snprintf(filename, size,
 102                          "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
 103                          symbol_conf.symfs, build_id_hex, build_id_hex + 2);
 104                 break;
 105
 106         case DSO_BINARY_TYPE__VMLINUX:
 107         case DSO_BINARY_TYPE__GUEST_VMLINUX:
 108         case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
 109                 snprintf(filename, size, "%s%s",
 110                          symbol_conf.symfs, dso->long_name);
 111                 break;
 112
 113         case DSO_BINARY_TYPE__GUEST_KMODULE:
 114                 snprintf(filename, size, "%s%s%s", symbol_conf.symfs,
 115                          root_dir, dso->long_name);
 116                 break;
 117
 118         case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
 119                 snprintf(filename, size, "%s%s", symbol_conf.symfs,
 120                          dso->long_name);
 121                 break;
 122
 123         case DSO_BINARY_TYPE__KCORE:
 124         case DSO_BINARY_TYPE__GUEST_KCORE:
 125                 snprintf(filename, size, "%s", dso->long_name);
 126                 break;
 127
 128         default:
 129         case DSO_BINARY_TYPE__KALLSYMS:
 130         case DSO_BINARY_TYPE__GUEST_KALLSYMS:
 131         case DSO_BINARY_TYPE__JAVA_JIT:
 132         case DSO_BINARY_TYPE__NOT_FOUND:
 133                 ret = -1;
 134                 break;
 135         }
 136
 137         return ret;
 138 }
 139
 140 /*
 141  * Global list of open DSOs and the counter.
 142  */
 143 static LIST_HEAD(dso__data_open);
 144 static long dso__data_open_cnt;
 145
 146 static void dso__list_add(struct dso *dso)
 147 {
 148         list_add_tail(&dso->data.open_entry, &dso__data_open);
 149         dso__data_open_cnt++;
 150 }
 151
 152 static void dso__list_del(struct dso *dso)
 153 {
 154         list_del(&dso->data.open_entry);
 155         WARN_ONCE(dso__data_open_cnt <= 0,
 156                   "DSO data fd counter out of bounds.");
 157         dso__data_open_cnt--;
 158 }
 159
 160 static int __open_dso(struct dso *dso, struct machine *machine)
 161 {
 162         int fd;
 163         char *root_dir = (char *)"";
 164         char *name = malloc(PATH_MAX);
 165
 166         if (!name)
 167                 return -ENOMEM;
 168
 169         if (machine)
 170                 root_dir = machine->root_dir;
 171
 172         if (dso__read_binary_type_filename(dso, dso->binary_type,
 173                                             root_dir, name, PATH_MAX)) {
 174                 free(name);
 175                 return -EINVAL;
 176         }
 177
 178         fd = open(name, O_RDONLY);
 179         free(name);
 180         return fd;
 181 }
 182
 183 static int open_dso(struct dso *dso, struct machine *machine)
 184 {
 185         int fd = __open_dso(dso, machine);
 186
 187         if (fd > 0)
 188                 dso__list_add(dso);
 189
 190         return fd;
 191 }
 192
 193 static void close_data_fd(struct dso *dso)
 194 {
 195         if (dso->data.fd >= 0) {
 196                 close(dso->data.fd);
 197                 dso->data.fd = -1;
 198                 dso__list_del(dso);
 199         }
 200 }
 201
 202 static void close_dso(struct dso *dso)
 203 {
 204         close_data_fd(dso);
 205 }
 206
 207 void dso__data_close(struct dso *dso)
 208 {
 209         close_dso(dso);
 210 }
 211
 212 int dso__data_fd(struct dso *dso, struct machine *machine)
 213 {
 214         enum dso_binary_type binary_type_data[] = {
 215                 DSO_BINARY_TYPE__BUILD_ID_CACHE,
 216                 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
 217                 DSO_BINARY_TYPE__NOT_FOUND,
 218         };
 219         int i = 0;
 220
 221         if (dso->data.fd >= 0)
 222                 return dso->data.fd;
 223
 224         if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
 225                 dso->data.fd = open_dso(dso, machine);
 226                 return dso->data.fd;
 227         }
 228
 229         do {
 230                 int fd;
 231
 232                 dso->binary_type = binary_type_data[i++];
 233
 234                 fd = open_dso(dso, machine);
 235                 if (fd >= 0)
 236                         return dso->data.fd = fd;
 237
 238         } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
 239
 240         return -EINVAL;
 241 }
 242
 243 static void
 244 dso_cache__free(struct rb_root *root)
 245 {
 246         struct rb_node *next = rb_first(root);
 247
 248         while (next) {
 249                 struct dso_cache *cache;
 250
 251                 cache = rb_entry(next, struct dso_cache, rb_node);
 252                 next = rb_next(&cache->rb_node);
 253                 rb_erase(&cache->rb_node, root);
 254                 free(cache);
 255         }
 256 }
 257
 258 static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset)
 259 {
 260         struct rb_node * const *p = &root->rb_node;
 261         const struct rb_node *parent = NULL;
 262         struct dso_cache *cache;
 263
 264         while (*p != NULL) {
 265                 u64 end;
 266
 267                 parent = *p;
 268                 cache = rb_entry(parent, struct dso_cache, rb_node);
 269                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 270
 271                 if (offset < cache->offset)
 272                         p = &(*p)->rb_left;
 273                 else if (offset >= end)
 274                         p = &(*p)->rb_right;
 275                 else
 276                         return cache;
 277         }
 278         return NULL;
 279 }
 280
 281 static void
 282 dso_cache__insert(struct rb_root *root, struct dso_cache *new)
 283 {
 284         struct rb_node **p = &root->rb_node;
 285         struct rb_node *parent = NULL;
 286         struct dso_cache *cache;
 287         u64 offset = new->offset;
 288
 289         while (*p != NULL) {
 290                 u64 end;
 291
 292                 parent = *p;
 293                 cache = rb_entry(parent, struct dso_cache, rb_node);
 294                 end = cache->offset + DSO__DATA_CACHE_SIZE;
 295
 296                 if (offset < cache->offset)
 297                         p = &(*p)->rb_left;
 298                 else if (offset >= end)
 299                         p = &(*p)->rb_right;
 300         }
 301
 302         rb_link_node(&new->rb_node, parent, p);
 303         rb_insert_color(&new->rb_node, root);
 304 }
 305
 306 static ssize_t
 307 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
 308                   u8 *data, u64 size)
 309 {
 310         u64 cache_offset = offset - cache->offset;
 311         u64 cache_size   = min(cache->size - cache_offset, size);
 312
 313         memcpy(data, cache->data + cache_offset, cache_size);
 314         return cache_size;
 315 }
 316
 317 static ssize_t
 318 dso_cache__read(struct dso *dso, struct machine *machine,
 319                  u64 offset, u8 *data, ssize_t size)
 320 {
 321         struct dso_cache *cache;
 322         ssize_t ret;
 323         int fd;
 324
 325         fd = dso__data_fd(dso, machine);
 326         if (fd < 0)
 327                 return -1;
 328
 329         do {
 330                 u64 cache_offset;
 331
 332                 ret = -ENOMEM;
 333
 334                 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
 335                 if (!cache)
 336                         break;
 337
 338                 cache_offset = offset & DSO__DATA_CACHE_MASK;
 339                 ret = -EINVAL;
 340
 341                 if (-1 == lseek(fd, cache_offset, SEEK_SET))
 342                         break;
 343
 344                 ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE);
 345                 if (ret <= 0)
 346                         break;
 347
 348                 cache->offset = cache_offset;
 349                 cache->size   = ret;
 350                 dso_cache__insert(&dso->data.cache, cache);
 351
 352                 ret = dso_cache__memcpy(cache, offset, data, size);
 353
 354         } while (0);
 355
 356         if (ret <= 0)
 357                 free(cache);
 358
 359         dso__data_close(dso);
 360         return ret;
 361 }
 362
 363 static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
 364                               u64 offset, u8 *data, ssize_t size)
 365 {
 366         struct dso_cache *cache;
 367
 368         cache = dso_cache__find(&dso->data.cache, offset);
 369         if (cache)
 370                 return dso_cache__memcpy(cache, offset, data, size);
 371         else
 372                 return dso_cache__read(dso, machine, offset, data, size);
 373 }
 374
 375 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 376                               u64 offset, u8 *data, ssize_t size)
 377 {
 378         ssize_t r = 0;
 379         u8 *p = data;
 380
 381         do {
 382                 ssize_t ret;
 383
 384                 ret = dso_cache_read(dso, machine, offset, p, size);
 385                 if (ret < 0)
 386                         return ret;
 387
 388                 /* Reached EOF, return what we have. */
 389                 if (!ret)
 390                         break;
 391
 392                 BUG_ON(ret > size);
 393
 394                 r      += ret;
 395                 p      += ret;
 396                 offset += ret;
 397                 size   -= ret;
 398
 399         } while (size);
 400
 401         return r;
 402 }
 403
 404 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
 405                             struct machine *machine, u64 addr,
 406                             u8 *data, ssize_t size)
 407 {
 408         u64 offset = map->map_ip(map, addr);
 409         return dso__data_read_offset(dso, machine, offset, data, size);
 410 }
 411
 412 struct map *dso__new_map(const char *name)
 413 {
 414         struct map *map = NULL;
 415         struct dso *dso = dso__new(name);
 416
 417         if (dso)
 418                 map = map__new2(0, dso, MAP__FUNCTION);
 419
 420         return map;
 421 }
 422
 423 struct dso *dso__kernel_findnew(struct machine *machine, const char *name,
 424                     const char *short_name, int dso_type)
 425 {
 426         /*
 427          * The kernel dso could be created by build_id processing.
 428          */
 429         struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
 430
 431         /*
 432          * We need to run this in all cases, since during the build_id
 433          * processing we had no idea this was the kernel dso.
 434          */
 435         if (dso != NULL) {
 436                 dso__set_short_name(dso, short_name, false);
 437                 dso->kernel = dso_type;
 438         }
 439
 440         return dso;
 441 }
 442
 443 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
 444 {
 445         if (name == NULL)
 446                 return;
 447
 448         if (dso->long_name_allocated)
 449                 free((char *)dso->long_name);
 450
 451         dso->long_name           = name;
 452         dso->long_name_len       = strlen(name);
 453         dso->long_name_allocated = name_allocated;
 454 }
 455
 456 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
 457 {
 458         if (name == NULL)
 459                 return;
 460
 461         if (dso->short_name_allocated)
 462                 free((char *)dso->short_name);
 463
 464         dso->short_name           = name;
 465         dso->short_name_len       = strlen(name);
 466         dso->short_name_allocated = name_allocated;
 467 }
 468
 469 static void dso__set_basename(struct dso *dso)
 470 {
 471        /*
 472         * basename() may modify path buffer, so we must pass
 473         * a copy.
 474         */
 475        char *base, *lname = strdup(dso->long_name);
 476
 477        if (!lname)
 478                return;
 479
 480        /*
 481         * basename() may return a pointer to internal
 482         * storage which is reused in subsequent calls
 483         * so copy the result.
 484         */
 485        base = strdup(basename(lname));
 486
 487        free(lname);
 488
 489        if (!base)
 490                return;
 491
 492        dso__set_short_name(dso, base, true);
 493 }
 494
 495 int dso__name_len(const struct dso *dso)
 496 {
 497         if (!dso)
 498                 return strlen("[unknown]");
 499         if (verbose)
 500                 return dso->long_name_len;
 501
 502         return dso->short_name_len;
 503 }
 504
 505 bool dso__loaded(const struct dso *dso, enum map_type type)
 506 {
 507         return dso->loaded & (1 << type);
 508 }
 509
 510 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
 511 {
 512         return dso->sorted_by_name & (1 << type);
 513 }
 514
 515 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
 516 {
 517         dso->sorted_by_name |= (1 << type);
 518 }
 519
 520 struct dso *dso__new(const char *name)
 521 {
 522         struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
 523
 524         if (dso != NULL) {
 525                 int i;
 526                 strcpy(dso->name, name);
 527                 dso__set_long_name(dso, dso->name, false);
 528                 dso__set_short_name(dso, dso->name, false);
 529                 for (i = 0; i < MAP__NR_TYPES; ++i)
 530                         dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
 531                 dso->data.cache = RB_ROOT;
 532                 dso->data.fd = -1;
 533                 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
 534                 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
 535                 dso->loaded = 0;
 536                 dso->rel = 0;
 537                 dso->sorted_by_name = 0;
 538                 dso->has_build_id = 0;
 539                 dso->has_srcline = 1;
 540                 dso->a2l_fails = 1;
 541                 dso->kernel = DSO_TYPE_USER;
 542                 dso->needs_swap = DSO_SWAP__UNSET;
 543                 INIT_LIST_HEAD(&dso->node);
 544                 INIT_LIST_HEAD(&dso->data.open_entry);
 545         }
 546
 547         return dso;
 548 }
 549
 550 void dso__delete(struct dso *dso)
 551 {
 552         int i;
 553         for (i = 0; i < MAP__NR_TYPES; ++i)
 554                 symbols__delete(&dso->symbols[i]);
 555
 556         if (dso->short_name_allocated) {
 557                 zfree((char **)&dso->short_name);
 558                 dso->short_name_allocated = false;
 559         }
 560
 561         if (dso->long_name_allocated) {
 562                 zfree((char **)&dso->long_name);
 563                 dso->long_name_allocated = false;
 564         }
 565
 566         dso__data_close(dso);
 567         dso_cache__free(&dso->data.cache);
 568         dso__free_a2l(dso);
 569         zfree(&dso->symsrc_filename);
 570         free(dso);
 571 }
 572
 573 void dso__set_build_id(struct dso *dso, void *build_id)
 574 {
 575         memcpy(dso->build_id, build_id, sizeof(dso->build_id));
 576         dso->has_build_id = 1;
 577 }
 578
 579 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
 580 {
 581         return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
 582 }
 583
 584 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
 585 {
 586         char path[PATH_MAX];
 587
 588         if (machine__is_default_guest(machine))
 589                 return;
 590         sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
 591         if (sysfs__read_build_id(path, dso->build_id,
 592                                  sizeof(dso->build_id)) == 0)
 593                 dso->has_build_id = true;
 594 }
 595
 596 int dso__kernel_module_get_build_id(struct dso *dso,
 597                                     const char *root_dir)
 598 {
 599         char filename[PATH_MAX];
 600         /*
 601          * kernel module short names are of the form "[module]" and
 602          * we need just "module" here.
 603          */
 604         const char *name = dso->short_name + 1;
 605
 606         snprintf(filename, sizeof(filename),
 607                  "%s/sys/module/%.*s/notes/.note.gnu.build-id",
 608                  root_dir, (int)strlen(name) - 1, name);
 609
 610         if (sysfs__read_build_id(filename, dso->build_id,
 611                                  sizeof(dso->build_id)) == 0)
 612                 dso->has_build_id = true;
 613
 614         return 0;
 615 }
 616
 617 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
 618 {
 619         bool have_build_id = false;
 620         struct dso *pos;
 621
 622         list_for_each_entry(pos, head, node) {
 623                 if (with_hits && !pos->hit)
 624                         continue;
 625                 if (pos->has_build_id) {
 626                         have_build_id = true;
 627                         continue;
 628                 }
 629                 if (filename__read_build_id(pos->long_name, pos->build_id,
 630                                             sizeof(pos->build_id)) > 0) {
 631                         have_build_id     = true;
 632                         pos->has_build_id = true;
 633                 }
 634         }
 635
 636         return have_build_id;
 637 }
 638
 639 void dsos__add(struct list_head *head, struct dso *dso)
 640 {
 641         list_add_tail(&dso->node, head);
 642 }
 643
 644 struct dso *dsos__find(const struct list_head *head, const char *name, bool cmp_short)
 645 {
 646         struct dso *pos;
 647
 648         if (cmp_short) {
 649                 list_for_each_entry(pos, head, node)
 650                         if (strcmp(pos->short_name, name) == 0)
 651                                 return pos;
 652                 return NULL;
 653         }
 654         list_for_each_entry(pos, head, node)
 655                 if (strcmp(pos->long_name, name) == 0)
 656                         return pos;
 657         return NULL;
 658 }
 659
 660 struct dso *__dsos__findnew(struct list_head *head, const char *name)
 661 {
 662         struct dso *dso = dsos__find(head, name, false);
 663
 664         if (!dso) {
 665                 dso = dso__new(name);
 666                 if (dso != NULL) {
 667                         dsos__add(head, dso);
 668                         dso__set_basename(dso);
 669                 }
 670         }
 671
 672         return dso;
 673 }
 674
 675 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
 676                                bool (skip)(struct dso *dso, int parm), int parm)
 677 {
 678         struct dso *pos;
 679         size_t ret = 0;
 680
 681         list_for_each_entry(pos, head, node) {
 682                 if (skip && skip(pos, parm))
 683                         continue;
 684                 ret += dso__fprintf_buildid(pos, fp);
 685                 ret += fprintf(fp, " %s\n", pos->long_name);
 686         }
 687         return ret;
 688 }
 689
 690 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
 691 {
 692         struct dso *pos;
 693         size_t ret = 0;
 694
 695         list_for_each_entry(pos, head, node) {
 696                 int i;
 697                 for (i = 0; i < MAP__NR_TYPES; ++i)
 698                         ret += dso__fprintf(pos, i, fp);
 699         }
 700
 701         return ret;
 702 }
 703
 704 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
 705 {
 706         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
 707
 708         build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
 709         return fprintf(fp, "%s", sbuild_id);
 710 }
 711
 712 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
 713 {
 714         struct rb_node *nd;
 715         size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
 716
 717         if (dso->short_name != dso->long_name)
 718                 ret += fprintf(fp, "%s, ", dso->long_name);
 719         ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
 720                        dso__loaded(dso, type) ? "" : "NOT ");
 721         ret += dso__fprintf_buildid(dso, fp);
 722         ret += fprintf(fp, ")\n");
 723         for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
 724                 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
 725                 ret += symbol__fprintf(pos, fp);
 726         }
 727
 728         return ret;
 729 }