SAFE public projects git trees. - safe/jmp/linux-2.6/blob - tools/perf/builtin-annotate.c

   1 /*
   2  * builtin-annotate.c
   3  *
   4  * Builtin annotate command: Analyze the perf.data input file,
   5  * look up and read DSOs and symbol information and display
   6  * a histogram of results, along various sorting keys.
   7  */
   8 #include "builtin.h"
   9
  10 #include "util/util.h"
  11
  12 #include "util/color.h"
  13 #include <linux/list.h>
  14 #include "util/cache.h"
  15 #include <linux/rbtree.h>
  16 #include "util/symbol.h"
  17 #include "util/string.h"
  18
  19 #include "perf.h"
  20 #include "util/debug.h"
  21
  22 #include "util/parse-options.h"
  23 #include "util/parse-events.h"
  24 #include "util/thread.h"
  25 #include "util/sort.h"
  26 #include "util/hist.h"
  27
  28 static char             const *input_name = "perf.data";
  29
  30 static int              force;
  31 static int              input;
  32
  33 static int              full_paths;
  34
  35 static int              print_line;
  36
  37 static unsigned long    page_size;
  38 static unsigned long    mmap_window = 32;
  39
  40 struct sym_hist {
  41         u64             sum;
  42         u64             ip[0];
  43 };
  44
  45 struct sym_ext {
  46         struct rb_node  node;
  47         double          percent;
  48         char            *path;
  49 };
  50
  51 struct sym_priv {
  52         struct sym_hist *hist;
  53         struct sym_ext  *ext;
  54 };
  55
  56 static const char *sym_hist_filter;
  57
  58 static int symbol_filter(struct map *map __used, struct symbol *sym)
  59 {
  60         if (sym_hist_filter == NULL ||
  61             strcmp(sym->name, sym_hist_filter) == 0) {
  62                 struct sym_priv *priv = symbol__priv(sym);
  63                 const int size = (sizeof(*priv->hist) +
  64                                   (sym->end - sym->start) * sizeof(u64));
  65
  66                 priv->hist = malloc(size);
  67                 if (priv->hist)
  68                         memset(priv->hist, 0, size);
  69                 return 0;
  70         }
  71         /*
  72          * FIXME: We should really filter it out, as we don't want to go thru symbols
  73          * we're not interested, and if a DSO ends up with no symbols, delete it too,
  74          * but right now the kernel loading routines in symbol.c bail out if no symbols
  75          * are found, fix it later.
  76          */
  77         return 0;
  78 }
  79
  80 /*
  81  * collect histogram counts
  82  */
  83 static void hist_hit(struct hist_entry *he, u64 ip)
  84 {
  85         unsigned int sym_size, offset;
  86         struct symbol *sym = he->sym;
  87         struct sym_priv *priv;
  88         struct sym_hist *h;
  89
  90         he->count++;
  91
  92         if (!sym || !he->map)
  93                 return;
  94
  95         priv = symbol__priv(sym);
  96         if (!priv->hist)
  97                 return;
  98
  99         sym_size = sym->end - sym->start;
 100         offset = ip - sym->start;
 101
 102         if (verbose)
 103                 fprintf(stderr, "%s: ip=%Lx\n", __func__,
 104                         he->map->unmap_ip(he->map, ip));
 105
 106         if (offset >= sym_size)
 107                 return;
 108
 109         h = priv->hist;
 110         h->sum++;
 111         h->ip[offset]++;
 112
 113         if (verbose >= 3)
 114                 printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
 115                         (void *)(unsigned long)he->sym->start,
 116                         he->sym->name,
 117                         (void *)(unsigned long)ip, ip - he->sym->start,
 118                         h->ip[offset]);
 119 }
 120
 121 static int hist_entry__add(struct thread *thread, struct map *map,
 122                            struct symbol *sym, u64 ip, u64 count, char level)
 123 {
 124         bool hit;
 125         struct hist_entry *he = __hist_entry__add(thread, map, sym, NULL, ip,
 126                                                   count, level, &hit);
 127         if (he == NULL)
 128                 return -ENOMEM;
 129         hist_hit(he, ip);
 130         return 0;
 131 }
 132
 133 static int
 134 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 135 {
 136         char level;
 137         u64 ip = event->ip.ip;
 138         struct map *map = NULL;
 139         struct symbol *sym = NULL;
 140         struct thread *thread = threads__findnew(event->ip.pid);
 141
 142         dump_printf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
 143                 (void *)(offset + head),
 144                 (void *)(long)(event->header.size),
 145                 event->header.misc,
 146                 event->ip.pid,
 147                 (void *)(long)ip);
 148
 149         if (thread == NULL) {
 150                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 151                         event->header.type);
 152                 return -1;
 153         }
 154
 155         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 156
 157         if (event->header.misc & PERF_RECORD_MISC_KERNEL) {
 158                 level = 'k';
 159                 sym = kernel_maps__find_symbol(ip, &map);
 160                 dump_printf(" ...... dso: %s\n",
 161                             map ? map->dso->long_name : "<not found>");
 162         } else if (event->header.misc & PERF_RECORD_MISC_USER) {
 163                 level = '.';
 164                 map = thread__find_map(thread, ip);
 165                 if (map != NULL) {
 166 got_map:
 167                         ip = map->map_ip(map, ip);
 168                         sym = map__find_symbol(map, ip, symbol_filter);
 169                 } else {
 170                         /*
 171                          * If this is outside of all known maps,
 172                          * and is a negative address, try to look it
 173                          * up in the kernel dso, as it might be a
 174                          * vsyscall or vdso (which executes in user-mode).
 175                          *
 176                          * XXX This is nasty, we should have a symbol list in
 177                          * the "[vdso]" dso, but for now lets use the old
 178                          * trick of looking in the whole kernel symbol list.
 179                          */
 180                         if ((long long)ip < 0) {
 181                                 map = kernel_map;
 182                                 goto got_map;
 183                         }
 184                 }
 185                 dump_printf(" ...... dso: %s\n",
 186                             map ? map->dso->long_name : "<not found>");
 187         } else {
 188                 level = 'H';
 189                 dump_printf(" ...... dso: [hypervisor]\n");
 190         }
 191
 192         if (hist_entry__add(thread, map, sym, ip, 1, level)) {
 193                 fprintf(stderr, "problem incrementing symbol count, "
 194                                 "skipping event\n");
 195                 return -1;
 196         }
 197         total++;
 198
 199         return 0;
 200 }
 201
 202 static int
 203 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 204 {
 205         struct map *map = map__new(&event->mmap, NULL, 0);
 206         struct thread *thread = threads__findnew(event->mmap.pid);
 207
 208         dump_printf("%p [%p]: PERF_RECORD_MMAP %d: [%p(%p) @ %p]: %s\n",
 209                 (void *)(offset + head),
 210                 (void *)(long)(event->header.size),
 211                 event->mmap.pid,
 212                 (void *)(long)event->mmap.start,
 213                 (void *)(long)event->mmap.len,
 214                 (void *)(long)event->mmap.pgoff,
 215                 event->mmap.filename);
 216
 217         if (thread == NULL || map == NULL) {
 218                 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 219                 return 0;
 220         }
 221
 222         thread__insert_map(thread, map);
 223         total_mmap++;
 224
 225         return 0;
 226 }
 227
 228 static int
 229 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
 230 {
 231         struct thread *thread = threads__findnew(event->comm.pid);
 232
 233         dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
 234                 (void *)(offset + head),
 235                 (void *)(long)(event->header.size),
 236                 event->comm.comm, event->comm.pid);
 237
 238         if (thread == NULL ||
 239             thread__set_comm(thread, event->comm.comm)) {
 240                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 241                 return -1;
 242         }
 243         total_comm++;
 244
 245         return 0;
 246 }
 247
 248 static int
 249 process_fork_event(event_t *event, unsigned long offset, unsigned long head)
 250 {
 251         struct thread *thread = threads__findnew(event->fork.pid);
 252         struct thread *parent = threads__findnew(event->fork.ppid);
 253
 254         dump_printf("%p [%p]: PERF_RECORD_FORK: %d:%d\n",
 255                 (void *)(offset + head),
 256                 (void *)(long)(event->header.size),
 257                 event->fork.pid, event->fork.ppid);
 258
 259         /*
 260          * A thread clone will have the same PID for both
 261          * parent and child.
 262          */
 263         if (thread == parent)
 264                 return 0;
 265
 266         if (!thread || !parent || thread__fork(thread, parent)) {
 267                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 268                 return -1;
 269         }
 270         total_fork++;
 271
 272         return 0;
 273 }
 274
 275 static int
 276 process_event(event_t *event, unsigned long offset, unsigned long head)
 277 {
 278         switch (event->header.type) {
 279         case PERF_RECORD_SAMPLE:
 280                 return process_sample_event(event, offset, head);
 281
 282         case PERF_RECORD_MMAP:
 283                 return process_mmap_event(event, offset, head);
 284
 285         case PERF_RECORD_COMM:
 286                 return process_comm_event(event, offset, head);
 287
 288         case PERF_RECORD_FORK:
 289                 return process_fork_event(event, offset, head);
 290         /*
 291          * We dont process them right now but they are fine:
 292          */
 293
 294         case PERF_RECORD_THROTTLE:
 295         case PERF_RECORD_UNTHROTTLE:
 296                 return 0;
 297
 298         default:
 299                 return -1;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static int parse_line(FILE *file, struct hist_entry *he, u64 len)
 306 {
 307         struct symbol *sym = he->sym;
 308         char *line = NULL, *tmp, *tmp2;
 309         static const char *prev_line;
 310         static const char *prev_color;
 311         unsigned int offset;
 312         size_t line_len;
 313         u64 start;
 314         s64 line_ip;
 315         int ret;
 316         char *c;
 317
 318         if (getline(&line, &line_len, file) < 0)
 319                 return -1;
 320         if (!line)
 321                 return -1;
 322
 323         c = strchr(line, '\n');
 324         if (c)
 325                 *c = 0;
 326
 327         line_ip = -1;
 328         offset = 0;
 329         ret = -2;
 330
 331         /*
 332          * Strip leading spaces:
 333          */
 334         tmp = line;
 335         while (*tmp) {
 336                 if (*tmp != ' ')
 337                         break;
 338                 tmp++;
 339         }
 340
 341         if (*tmp) {
 342                 /*
 343                  * Parse hexa addresses followed by ':'
 344                  */
 345                 line_ip = strtoull(tmp, &tmp2, 16);
 346                 if (*tmp2 != ':')
 347                         line_ip = -1;
 348         }
 349
 350         start = he->map->unmap_ip(he->map, sym->start);
 351
 352         if (line_ip != -1) {
 353                 const char *path = NULL;
 354                 unsigned int hits = 0;
 355                 double percent = 0.0;
 356                 const char *color;
 357                 struct sym_priv *priv = symbol__priv(sym);
 358                 struct sym_ext *sym_ext = priv->ext;
 359                 struct sym_hist *h = priv->hist;
 360
 361                 offset = line_ip - start;
 362                 if (offset < len)
 363                         hits = h->ip[offset];
 364
 365                 if (offset < len && sym_ext) {
 366                         path = sym_ext[offset].path;
 367                         percent = sym_ext[offset].percent;
 368                 } else if (h->sum)
 369                         percent = 100.0 * hits / h->sum;
 370
 371                 color = get_percent_color(percent);
 372
 373                 /*
 374                  * Also color the filename and line if needed, with
 375                  * the same color than the percentage. Don't print it
 376                  * twice for close colored ip with the same filename:line
 377                  */
 378                 if (path) {
 379                         if (!prev_line || strcmp(prev_line, path)
 380                                        || color != prev_color) {
 381                                 color_fprintf(stdout, color, " %s", path);
 382                                 prev_line = path;
 383                                 prev_color = color;
 384                         }
 385                 }
 386
 387                 color_fprintf(stdout, color, " %7.2f", percent);
 388                 printf(" :      ");
 389                 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
 390         } else {
 391                 if (!*line)
 392                         printf("         :\n");
 393                 else
 394                         printf("         :      %s\n", line);
 395         }
 396
 397         return 0;
 398 }
 399
 400 static struct rb_root root_sym_ext;
 401
 402 static void insert_source_line(struct sym_ext *sym_ext)
 403 {
 404         struct sym_ext *iter;
 405         struct rb_node **p = &root_sym_ext.rb_node;
 406         struct rb_node *parent = NULL;
 407
 408         while (*p != NULL) {
 409                 parent = *p;
 410                 iter = rb_entry(parent, struct sym_ext, node);
 411
 412                 if (sym_ext->percent > iter->percent)
 413                         p = &(*p)->rb_left;
 414                 else
 415                         p = &(*p)->rb_right;
 416         }
 417
 418         rb_link_node(&sym_ext->node, parent, p);
 419         rb_insert_color(&sym_ext->node, &root_sym_ext);
 420 }
 421
 422 static void free_source_line(struct hist_entry *he, int len)
 423 {
 424         struct sym_priv *priv = symbol__priv(he->sym);
 425         struct sym_ext *sym_ext = priv->ext;
 426         int i;
 427
 428         if (!sym_ext)
 429                 return;
 430
 431         for (i = 0; i < len; i++)
 432                 free(sym_ext[i].path);
 433         free(sym_ext);
 434
 435         priv->ext = NULL;
 436         root_sym_ext = RB_ROOT;
 437 }
 438
 439 /* Get the filename:line for the colored entries */
 440 static void
 441 get_source_line(struct hist_entry *he, int len, const char *filename)
 442 {
 443         struct symbol *sym = he->sym;
 444         u64 start;
 445         int i;
 446         char cmd[PATH_MAX * 2];
 447         struct sym_ext *sym_ext;
 448         struct sym_priv *priv = symbol__priv(sym);
 449         struct sym_hist *h = priv->hist;
 450
 451         if (!h->sum)
 452                 return;
 453
 454         sym_ext = priv->ext = calloc(len, sizeof(struct sym_ext));
 455         if (!priv->ext)
 456                 return;
 457
 458         start = he->map->unmap_ip(he->map, sym->start);
 459
 460         for (i = 0; i < len; i++) {
 461                 char *path = NULL;
 462                 size_t line_len;
 463                 u64 offset;
 464                 FILE *fp;
 465
 466                 sym_ext[i].percent = 100.0 * h->ip[i] / h->sum;
 467                 if (sym_ext[i].percent <= 0.5)
 468                         continue;
 469
 470                 offset = start + i;
 471                 sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
 472                 fp = popen(cmd, "r");
 473                 if (!fp)
 474                         continue;
 475
 476                 if (getline(&path, &line_len, fp) < 0 || !line_len)
 477                         goto next;
 478
 479                 sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
 480                 if (!sym_ext[i].path)
 481                         goto next;
 482
 483                 strcpy(sym_ext[i].path, path);
 484                 insert_source_line(&sym_ext[i]);
 485
 486         next:
 487                 pclose(fp);
 488         }
 489 }
 490
 491 static void print_summary(const char *filename)
 492 {
 493         struct sym_ext *sym_ext;
 494         struct rb_node *node;
 495
 496         printf("\nSorted summary for file %s\n", filename);
 497         printf("----------------------------------------------\n\n");
 498
 499         if (RB_EMPTY_ROOT(&root_sym_ext)) {
 500                 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
 501                 return;
 502         }
 503
 504         node = rb_first(&root_sym_ext);
 505         while (node) {
 506                 double percent;
 507                 const char *color;
 508                 char *path;
 509
 510                 sym_ext = rb_entry(node, struct sym_ext, node);
 511                 percent = sym_ext->percent;
 512                 color = get_percent_color(percent);
 513                 path = sym_ext->path;
 514
 515                 color_fprintf(stdout, color, " %7.2f %s", percent, path);
 516                 node = rb_next(node);
 517         }
 518 }
 519
 520 static void annotate_sym(struct hist_entry *he)
 521 {
 522         struct map *map = he->map;
 523         struct dso *dso = map->dso;
 524         struct symbol *sym = he->sym;
 525         const char *filename = dso->long_name, *d_filename;
 526         u64 len;
 527         char command[PATH_MAX*2];
 528         FILE *file;
 529
 530         if (!filename)
 531                 return;
 532
 533         if (verbose)
 534                 fprintf(stderr, "%s: filename=%s, sym=%s, start=%Lx, end=%Lx\n",
 535                         __func__, filename, sym->name,
 536                         map->unmap_ip(map, sym->start),
 537                         map->unmap_ip(map, sym->end));
 538
 539         if (full_paths)
 540                 d_filename = filename;
 541         else
 542                 d_filename = basename(filename);
 543
 544         len = sym->end - sym->start;
 545
 546         if (print_line) {
 547                 get_source_line(he, len, filename);
 548                 print_summary(filename);
 549         }
 550
 551         printf("\n\n------------------------------------------------\n");
 552         printf(" Percent |      Source code & Disassembly of %s\n", d_filename);
 553         printf("------------------------------------------------\n");
 554
 555         if (verbose >= 2)
 556                 printf("annotating [%p] %30s : [%p] %30s\n",
 557                        dso, dso->long_name, sym, sym->name);
 558
 559         sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
 560                 map->unmap_ip(map, sym->start), map->unmap_ip(map, sym->end),
 561                 filename, filename);
 562
 563         if (verbose >= 3)
 564                 printf("doing: %s\n", command);
 565
 566         file = popen(command, "r");
 567         if (!file)
 568                 return;
 569
 570         while (!feof(file)) {
 571                 if (parse_line(file, he, len) < 0)
 572                         break;
 573         }
 574
 575         pclose(file);
 576         if (print_line)
 577                 free_source_line(he, len);
 578 }
 579
 580 static void find_annotations(void)
 581 {
 582         struct rb_node *nd;
 583
 584         for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
 585                 struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
 586                 struct sym_priv *priv;
 587
 588                 if (he->sym == NULL)
 589                         continue;
 590
 591                 priv = symbol__priv(he->sym);
 592                 if (priv->hist == NULL)
 593                         continue;
 594
 595                 annotate_sym(he);
 596                 /*
 597                  * Since we have a hist_entry per IP for the same symbol, free
 598                  * he->sym->hist to signal we already processed this symbol.
 599                  */
 600                 free(priv->hist);
 601                 priv->hist = NULL;
 602         }
 603 }
 604
 605 static int __cmd_annotate(void)
 606 {
 607         int ret, rc = EXIT_FAILURE;
 608         unsigned long offset = 0;
 609         unsigned long head = 0;
 610         struct stat input_stat;
 611         event_t *event;
 612         uint32_t size;
 613         char *buf;
 614
 615         register_idle_thread();
 616
 617         input = open(input_name, O_RDONLY);
 618         if (input < 0) {
 619                 perror("failed to open file");
 620                 exit(-1);
 621         }
 622
 623         ret = fstat(input, &input_stat);
 624         if (ret < 0) {
 625                 perror("failed to stat file");
 626                 exit(-1);
 627         }
 628
 629         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
 630                 fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
 631                 exit(-1);
 632         }
 633
 634         if (!input_stat.st_size) {
 635                 fprintf(stderr, "zero-sized file, nothing to do!\n");
 636                 exit(0);
 637         }
 638
 639         if (load_kernel(symbol_filter) < 0) {
 640                 perror("failed to load kernel symbols");
 641                 return EXIT_FAILURE;
 642         }
 643
 644 remap:
 645         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
 646                            MAP_SHARED, input, offset);
 647         if (buf == MAP_FAILED) {
 648                 perror("failed to mmap file");
 649                 exit(-1);
 650         }
 651
 652 more:
 653         event = (event_t *)(buf + head);
 654
 655         size = event->header.size;
 656         if (!size)
 657                 size = 8;
 658
 659         if (head + event->header.size >= page_size * mmap_window) {
 660                 unsigned long shift = page_size * (head / page_size);
 661                 int munmap_ret;
 662
 663                 munmap_ret = munmap(buf, page_size * mmap_window);
 664                 assert(munmap_ret == 0);
 665
 666                 offset += shift;
 667                 head -= shift;
 668                 goto remap;
 669         }
 670
 671         size = event->header.size;
 672
 673         dump_printf("%p [%p]: event: %d\n",
 674                         (void *)(offset + head),
 675                         (void *)(long)event->header.size,
 676                         event->header.type);
 677
 678         if (!size || process_event(event, offset, head) < 0) {
 679
 680                 dump_printf("%p [%p]: skipping unknown header type: %d\n",
 681                         (void *)(offset + head),
 682                         (void *)(long)(event->header.size),
 683                         event->header.type);
 684
 685                 total_unknown++;
 686
 687                 /*
 688                  * assume we lost track of the stream, check alignment, and
 689                  * increment a single u64 in the hope to catch on again 'soon'.
 690                  */
 691
 692                 if (unlikely(head & 7))
 693                         head &= ~7ULL;
 694
 695                 size = 8;
 696         }
 697
 698         head += size;
 699
 700         if (offset + head < (unsigned long)input_stat.st_size)
 701                 goto more;
 702
 703         rc = EXIT_SUCCESS;
 704         close(input);
 705
 706         dump_printf("      IP events: %10ld\n", total);
 707         dump_printf("    mmap events: %10ld\n", total_mmap);
 708         dump_printf("    comm events: %10ld\n", total_comm);
 709         dump_printf("    fork events: %10ld\n", total_fork);
 710         dump_printf(" unknown events: %10ld\n", total_unknown);
 711
 712         if (dump_trace)
 713                 return 0;
 714
 715         if (verbose > 3)
 716                 threads__fprintf(stdout);
 717
 718         if (verbose > 2)
 719                 dsos__fprintf(stdout);
 720
 721         collapse__resort();
 722         output__resort(total);
 723
 724         find_annotations();
 725
 726         return rc;
 727 }
 728
 729 static const char * const annotate_usage[] = {
 730         "perf annotate [<options>] <command>",
 731         NULL
 732 };
 733
 734 static const struct option options[] = {
 735         OPT_STRING('i', "input", &input_name, "file",
 736                     "input file name"),
 737         OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
 738                     "symbol to annotate"),
 739         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 740         OPT_BOOLEAN('v', "verbose", &verbose,
 741                     "be more verbose (show symbol address, etc)"),
 742         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 743                     "dump raw trace in ASCII"),
 744         OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
 745         OPT_BOOLEAN('m', "modules", &modules,
 746                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
 747         OPT_BOOLEAN('l', "print-line", &print_line,
 748                     "print matching source lines (may be slow)"),
 749         OPT_BOOLEAN('P', "full-paths", &full_paths,
 750                     "Don't shorten the displayed pathnames"),
 751         OPT_END()
 752 };
 753
 754 static void setup_sorting(void)
 755 {
 756         char *tmp, *tok, *str = strdup(sort_order);
 757
 758         for (tok = strtok_r(str, ", ", &tmp);
 759                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
 760                 if (sort_dimension__add(tok) < 0) {
 761                         error("Unknown --sort key: `%s'", tok);
 762                         usage_with_options(annotate_usage, options);
 763                 }
 764         }
 765
 766         free(str);
 767 }
 768
 769 int cmd_annotate(int argc, const char **argv, const char *prefix __used)
 770 {
 771         symbol__init(sizeof(struct sym_priv));
 772
 773         page_size = getpagesize();
 774
 775         argc = parse_options(argc, argv, options, annotate_usage, 0);
 776
 777         setup_sorting();
 778
 779         if (argc) {
 780                 /*
 781                  * Special case: if there's an argument left then assume tha
 782                  * it's a symbol filter:
 783                  */
 784                 if (argc > 1)
 785                         usage_with_options(annotate_usage, options);
 786
 787                 sym_hist_filter = argv[0];
 788         }
 789
 790         setup_pager();
 791
 792         if (field_sep && *field_sep == '.') {
 793                 fputs("'.' is the only non valid --field-separator argument\n",
 794                                 stderr);
 795                 exit(129);
 796         }
 797
 798         return __cmd_annotate();
 799 }