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
  26 static char             const *input_name = "perf.data";
  27
  28 static char             default_sort_order[] = "comm,symbol";
  29 static char             *sort_order = default_sort_order;
  30
  31 static int              force;
  32 static int              input;
  33 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
  34
  35 static int              full_paths;
  36
  37 static int              print_line;
  38
  39 static unsigned long    page_size;
  40 static unsigned long    mmap_window = 32;
  41
  42 static struct rb_root   threads;
  43 static struct thread    *last_match;
  44
  45
  46 struct sym_ext {
  47         struct rb_node  node;
  48         double          percent;
  49         char            *path;
  50 };
  51
  52 /*
  53  * histogram, sorted on item, collects counts
  54  */
  55
  56 static struct rb_root hist;
  57
  58 struct hist_entry {
  59         struct rb_node   rb_node;
  60
  61         struct thread    *thread;
  62         struct map       *map;
  63         struct dso       *dso;
  64         struct symbol    *sym;
  65         u64      ip;
  66         char             level;
  67
  68         uint32_t         count;
  69 };
  70
  71 /*
  72  * configurable sorting bits
  73  */
  74
  75 struct sort_entry {
  76         struct list_head list;
  77
  78         const char *header;
  79
  80         int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
  81         int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
  82         size_t  (*print)(FILE *fp, struct hist_entry *);
  83 };
  84
  85 /* --sort pid */
  86
  87 static int64_t
  88 sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
  89 {
  90         return right->thread->pid - left->thread->pid;
  91 }
  92
  93 static size_t
  94 sort__thread_print(FILE *fp, struct hist_entry *self)
  95 {
  96         return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
  97 }
  98
  99 static struct sort_entry sort_thread = {
 100         .header = "         Command:  Pid",
 101         .cmp    = sort__thread_cmp,
 102         .print  = sort__thread_print,
 103 };
 104
 105 /* --sort comm */
 106
 107 static int64_t
 108 sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
 109 {
 110         return right->thread->pid - left->thread->pid;
 111 }
 112
 113 static int64_t
 114 sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
 115 {
 116         char *comm_l = left->thread->comm;
 117         char *comm_r = right->thread->comm;
 118
 119         if (!comm_l || !comm_r) {
 120                 if (!comm_l && !comm_r)
 121                         return 0;
 122                 else if (!comm_l)
 123                         return -1;
 124                 else
 125                         return 1;
 126         }
 127
 128         return strcmp(comm_l, comm_r);
 129 }
 130
 131 static size_t
 132 sort__comm_print(FILE *fp, struct hist_entry *self)
 133 {
 134         return fprintf(fp, "%16s", self->thread->comm);
 135 }
 136
 137 static struct sort_entry sort_comm = {
 138         .header         = "         Command",
 139         .cmp            = sort__comm_cmp,
 140         .collapse       = sort__comm_collapse,
 141         .print          = sort__comm_print,
 142 };
 143
 144 /* --sort dso */
 145
 146 static int64_t
 147 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 148 {
 149         struct dso *dso_l = left->dso;
 150         struct dso *dso_r = right->dso;
 151
 152         if (!dso_l || !dso_r) {
 153                 if (!dso_l && !dso_r)
 154                         return 0;
 155                 else if (!dso_l)
 156                         return -1;
 157                 else
 158                         return 1;
 159         }
 160
 161         return strcmp(dso_l->name, dso_r->name);
 162 }
 163
 164 static size_t
 165 sort__dso_print(FILE *fp, struct hist_entry *self)
 166 {
 167         if (self->dso)
 168                 return fprintf(fp, "%-25s", self->dso->name);
 169
 170         return fprintf(fp, "%016llx         ", (u64)self->ip);
 171 }
 172
 173 static struct sort_entry sort_dso = {
 174         .header = "Shared Object            ",
 175         .cmp    = sort__dso_cmp,
 176         .print  = sort__dso_print,
 177 };
 178
 179 /* --sort symbol */
 180
 181 static int64_t
 182 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 183 {
 184         u64 ip_l, ip_r;
 185
 186         if (left->sym == right->sym)
 187                 return 0;
 188
 189         ip_l = left->sym ? left->sym->start : left->ip;
 190         ip_r = right->sym ? right->sym->start : right->ip;
 191
 192         return (int64_t)(ip_r - ip_l);
 193 }
 194
 195 static size_t
 196 sort__sym_print(FILE *fp, struct hist_entry *self)
 197 {
 198         size_t ret = 0;
 199
 200         if (verbose)
 201                 ret += fprintf(fp, "%#018llx  ", (u64)self->ip);
 202
 203         if (self->sym) {
 204                 ret += fprintf(fp, "[%c] %s",
 205                         self->dso == kernel_dso ? 'k' : '.', self->sym->name);
 206         } else {
 207                 ret += fprintf(fp, "%#016llx", (u64)self->ip);
 208         }
 209
 210         return ret;
 211 }
 212
 213 static struct sort_entry sort_sym = {
 214         .header = "Symbol",
 215         .cmp    = sort__sym_cmp,
 216         .print  = sort__sym_print,
 217 };
 218
 219 static int sort__need_collapse = 0;
 220
 221 struct sort_dimension {
 222         const char              *name;
 223         struct sort_entry       *entry;
 224         int                     taken;
 225 };
 226
 227 static struct sort_dimension sort_dimensions[] = {
 228         { .name = "pid",        .entry = &sort_thread,  },
 229         { .name = "comm",       .entry = &sort_comm,    },
 230         { .name = "dso",        .entry = &sort_dso,     },
 231         { .name = "symbol",     .entry = &sort_sym,     },
 232 };
 233
 234 static LIST_HEAD(hist_entry__sort_list);
 235
 236 static int sort_dimension__add(char *tok)
 237 {
 238         unsigned int i;
 239
 240         for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
 241                 struct sort_dimension *sd = &sort_dimensions[i];
 242
 243                 if (sd->taken)
 244                         continue;
 245
 246                 if (strncasecmp(tok, sd->name, strlen(tok)))
 247                         continue;
 248
 249                 if (sd->entry->collapse)
 250                         sort__need_collapse = 1;
 251
 252                 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
 253                 sd->taken = 1;
 254
 255                 return 0;
 256         }
 257
 258         return -ESRCH;
 259 }
 260
 261 static int64_t
 262 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 263 {
 264         struct sort_entry *se;
 265         int64_t cmp = 0;
 266
 267         list_for_each_entry(se, &hist_entry__sort_list, list) {
 268                 cmp = se->cmp(left, right);
 269                 if (cmp)
 270                         break;
 271         }
 272
 273         return cmp;
 274 }
 275
 276 static int64_t
 277 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 278 {
 279         struct sort_entry *se;
 280         int64_t cmp = 0;
 281
 282         list_for_each_entry(se, &hist_entry__sort_list, list) {
 283                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 284
 285                 f = se->collapse ?: se->cmp;
 286
 287                 cmp = f(left, right);
 288                 if (cmp)
 289                         break;
 290         }
 291
 292         return cmp;
 293 }
 294
 295 /*
 296  * collect histogram counts
 297  */
 298 static void hist_hit(struct hist_entry *he, u64 ip)
 299 {
 300         unsigned int sym_size, offset;
 301         struct symbol *sym = he->sym;
 302
 303         he->count++;
 304
 305         if (!sym || !sym->hist)
 306                 return;
 307
 308         sym_size = sym->end - sym->start;
 309         offset = ip - sym->start;
 310
 311         if (offset >= sym_size)
 312                 return;
 313
 314         sym->hist_sum++;
 315         sym->hist[offset]++;
 316
 317         if (verbose >= 3)
 318                 printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
 319                         (void *)(unsigned long)he->sym->start,
 320                         he->sym->name,
 321                         (void *)(unsigned long)ip, ip - he->sym->start,
 322                         sym->hist[offset]);
 323 }
 324
 325 static int
 326 hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
 327                 struct symbol *sym, u64 ip, char level)
 328 {
 329         struct rb_node **p = &hist.rb_node;
 330         struct rb_node *parent = NULL;
 331         struct hist_entry *he;
 332         struct hist_entry entry = {
 333                 .thread = thread,
 334                 .map    = map,
 335                 .dso    = dso,
 336                 .sym    = sym,
 337                 .ip     = ip,
 338                 .level  = level,
 339                 .count  = 1,
 340         };
 341         int cmp;
 342
 343         while (*p != NULL) {
 344                 parent = *p;
 345                 he = rb_entry(parent, struct hist_entry, rb_node);
 346
 347                 cmp = hist_entry__cmp(&entry, he);
 348
 349                 if (!cmp) {
 350                         hist_hit(he, ip);
 351
 352                         return 0;
 353                 }
 354
 355                 if (cmp < 0)
 356                         p = &(*p)->rb_left;
 357                 else
 358                         p = &(*p)->rb_right;
 359         }
 360
 361         he = malloc(sizeof(*he));
 362         if (!he)
 363                 return -ENOMEM;
 364         *he = entry;
 365         rb_link_node(&he->rb_node, parent, p);
 366         rb_insert_color(&he->rb_node, &hist);
 367
 368         return 0;
 369 }
 370
 371 static void hist_entry__free(struct hist_entry *he)
 372 {
 373         free(he);
 374 }
 375
 376 /*
 377  * collapse the histogram
 378  */
 379
 380 static struct rb_root collapse_hists;
 381
 382 static void collapse__insert_entry(struct hist_entry *he)
 383 {
 384         struct rb_node **p = &collapse_hists.rb_node;
 385         struct rb_node *parent = NULL;
 386         struct hist_entry *iter;
 387         int64_t cmp;
 388
 389         while (*p != NULL) {
 390                 parent = *p;
 391                 iter = rb_entry(parent, struct hist_entry, rb_node);
 392
 393                 cmp = hist_entry__collapse(iter, he);
 394
 395                 if (!cmp) {
 396                         iter->count += he->count;
 397                         hist_entry__free(he);
 398                         return;
 399                 }
 400
 401                 if (cmp < 0)
 402                         p = &(*p)->rb_left;
 403                 else
 404                         p = &(*p)->rb_right;
 405         }
 406
 407         rb_link_node(&he->rb_node, parent, p);
 408         rb_insert_color(&he->rb_node, &collapse_hists);
 409 }
 410
 411 static void collapse__resort(void)
 412 {
 413         struct rb_node *next;
 414         struct hist_entry *n;
 415
 416         if (!sort__need_collapse)
 417                 return;
 418
 419         next = rb_first(&hist);
 420         while (next) {
 421                 n = rb_entry(next, struct hist_entry, rb_node);
 422                 next = rb_next(&n->rb_node);
 423
 424                 rb_erase(&n->rb_node, &hist);
 425                 collapse__insert_entry(n);
 426         }
 427 }
 428
 429 /*
 430  * reverse the map, sort on count.
 431  */
 432
 433 static struct rb_root output_hists;
 434
 435 static void output__insert_entry(struct hist_entry *he)
 436 {
 437         struct rb_node **p = &output_hists.rb_node;
 438         struct rb_node *parent = NULL;
 439         struct hist_entry *iter;
 440
 441         while (*p != NULL) {
 442                 parent = *p;
 443                 iter = rb_entry(parent, struct hist_entry, rb_node);
 444
 445                 if (he->count > iter->count)
 446                         p = &(*p)->rb_left;
 447                 else
 448                         p = &(*p)->rb_right;
 449         }
 450
 451         rb_link_node(&he->rb_node, parent, p);
 452         rb_insert_color(&he->rb_node, &output_hists);
 453 }
 454
 455 static void output__resort(void)
 456 {
 457         struct rb_node *next;
 458         struct hist_entry *n;
 459         struct rb_root *tree = &hist;
 460
 461         if (sort__need_collapse)
 462                 tree = &collapse_hists;
 463
 464         next = rb_first(tree);
 465
 466         while (next) {
 467                 n = rb_entry(next, struct hist_entry, rb_node);
 468                 next = rb_next(&n->rb_node);
 469
 470                 rb_erase(&n->rb_node, tree);
 471                 output__insert_entry(n);
 472         }
 473 }
 474
 475 static unsigned long total = 0,
 476                      total_mmap = 0,
 477                      total_comm = 0,
 478                      total_fork = 0,
 479                      total_unknown = 0;
 480
 481 static int
 482 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 483 {
 484         char level;
 485         int show = 0;
 486         struct dso *dso = NULL;
 487         struct thread *thread;
 488         u64 ip = event->ip.ip;
 489         struct map *map = NULL;
 490
 491         thread = threads__findnew(event->ip.pid, &threads, &last_match);
 492
 493         dump_printf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
 494                 (void *)(offset + head),
 495                 (void *)(long)(event->header.size),
 496                 event->header.misc,
 497                 event->ip.pid,
 498                 (void *)(long)ip);
 499
 500         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 501
 502         if (thread == NULL) {
 503                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 504                         event->header.type);
 505                 return -1;
 506         }
 507
 508         if (event->header.misc & PERF_RECORD_MISC_KERNEL) {
 509                 show = SHOW_KERNEL;
 510                 level = 'k';
 511
 512                 dso = kernel_dso;
 513
 514                 dump_printf(" ...... dso: %s\n", dso->name);
 515
 516         } else if (event->header.misc & PERF_RECORD_MISC_USER) {
 517
 518                 show = SHOW_USER;
 519                 level = '.';
 520
 521                 map = thread__find_map(thread, ip);
 522                 if (map != NULL) {
 523                         ip = map->map_ip(map, ip);
 524                         dso = map->dso;
 525                 } else {
 526                         /*
 527                          * If this is outside of all known maps,
 528                          * and is a negative address, try to look it
 529                          * up in the kernel dso, as it might be a
 530                          * vsyscall (which executes in user-mode):
 531                          */
 532                         if ((long long)ip < 0)
 533                                 dso = kernel_dso;
 534                 }
 535                 dump_printf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
 536
 537         } else {
 538                 show = SHOW_HV;
 539                 level = 'H';
 540                 dump_printf(" ...... dso: [hypervisor]\n");
 541         }
 542
 543         if (show & show_mask) {
 544                 struct symbol *sym = NULL;
 545
 546                 if (dso)
 547                         sym = dso->find_symbol(dso, ip);
 548
 549                 if (hist_entry__add(thread, map, dso, sym, ip, level)) {
 550                         fprintf(stderr,
 551                 "problem incrementing symbol count, skipping event\n");
 552                         return -1;
 553                 }
 554         }
 555         total++;
 556
 557         return 0;
 558 }
 559
 560 static int
 561 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 562 {
 563         struct thread *thread;
 564         struct map *map = map__new(&event->mmap, NULL, 0);
 565
 566         thread = threads__findnew(event->mmap.pid, &threads, &last_match);
 567
 568         dump_printf("%p [%p]: PERF_RECORD_MMAP %d: [%p(%p) @ %p]: %s\n",
 569                 (void *)(offset + head),
 570                 (void *)(long)(event->header.size),
 571                 event->mmap.pid,
 572                 (void *)(long)event->mmap.start,
 573                 (void *)(long)event->mmap.len,
 574                 (void *)(long)event->mmap.pgoff,
 575                 event->mmap.filename);
 576
 577         if (thread == NULL || map == NULL) {
 578                 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 579                 return 0;
 580         }
 581
 582         thread__insert_map(thread, map);
 583         total_mmap++;
 584
 585         return 0;
 586 }
 587
 588 static int
 589 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
 590 {
 591         struct thread *thread;
 592
 593         thread = threads__findnew(event->comm.pid, &threads, &last_match);
 594         dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
 595                 (void *)(offset + head),
 596                 (void *)(long)(event->header.size),
 597                 event->comm.comm, event->comm.pid);
 598
 599         if (thread == NULL ||
 600             thread__set_comm(thread, event->comm.comm)) {
 601                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 602                 return -1;
 603         }
 604         total_comm++;
 605
 606         return 0;
 607 }
 608
 609 static int
 610 process_fork_event(event_t *event, unsigned long offset, unsigned long head)
 611 {
 612         struct thread *thread;
 613         struct thread *parent;
 614
 615         thread = threads__findnew(event->fork.pid, &threads, &last_match);
 616         parent = threads__findnew(event->fork.ppid, &threads, &last_match);
 617         dump_printf("%p [%p]: PERF_RECORD_FORK: %d:%d\n",
 618                 (void *)(offset + head),
 619                 (void *)(long)(event->header.size),
 620                 event->fork.pid, event->fork.ppid);
 621
 622         /*
 623          * A thread clone will have the same PID for both
 624          * parent and child.
 625          */
 626         if (thread == parent)
 627                 return 0;
 628
 629         if (!thread || !parent || thread__fork(thread, parent)) {
 630                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 631                 return -1;
 632         }
 633         total_fork++;
 634
 635         return 0;
 636 }
 637
 638 static int
 639 process_event(event_t *event, unsigned long offset, unsigned long head)
 640 {
 641         switch (event->header.type) {
 642         case PERF_RECORD_SAMPLE:
 643                 return process_sample_event(event, offset, head);
 644
 645         case PERF_RECORD_MMAP:
 646                 return process_mmap_event(event, offset, head);
 647
 648         case PERF_RECORD_COMM:
 649                 return process_comm_event(event, offset, head);
 650
 651         case PERF_RECORD_FORK:
 652                 return process_fork_event(event, offset, head);
 653         /*
 654          * We dont process them right now but they are fine:
 655          */
 656
 657         case PERF_RECORD_THROTTLE:
 658         case PERF_RECORD_UNTHROTTLE:
 659                 return 0;
 660
 661         default:
 662                 return -1;
 663         }
 664
 665         return 0;
 666 }
 667
 668 static int
 669 parse_line(FILE *file, struct symbol *sym, u64 start, u64 len)
 670 {
 671         char *line = NULL, *tmp, *tmp2;
 672         static const char *prev_line;
 673         static const char *prev_color;
 674         unsigned int offset;
 675         size_t line_len;
 676         s64 line_ip;
 677         int ret;
 678         char *c;
 679
 680         if (getline(&line, &line_len, file) < 0)
 681                 return -1;
 682         if (!line)
 683                 return -1;
 684
 685         c = strchr(line, '\n');
 686         if (c)
 687                 *c = 0;
 688
 689         line_ip = -1;
 690         offset = 0;
 691         ret = -2;
 692
 693         /*
 694          * Strip leading spaces:
 695          */
 696         tmp = line;
 697         while (*tmp) {
 698                 if (*tmp != ' ')
 699                         break;
 700                 tmp++;
 701         }
 702
 703         if (*tmp) {
 704                 /*
 705                  * Parse hexa addresses followed by ':'
 706                  */
 707                 line_ip = strtoull(tmp, &tmp2, 16);
 708                 if (*tmp2 != ':')
 709                         line_ip = -1;
 710         }
 711
 712         if (line_ip != -1) {
 713                 const char *path = NULL;
 714                 unsigned int hits = 0;
 715                 double percent = 0.0;
 716                 const char *color;
 717                 struct sym_ext *sym_ext = sym->priv;
 718
 719                 offset = line_ip - start;
 720                 if (offset < len)
 721                         hits = sym->hist[offset];
 722
 723                 if (offset < len && sym_ext) {
 724                         path = sym_ext[offset].path;
 725                         percent = sym_ext[offset].percent;
 726                 } else if (sym->hist_sum)
 727                         percent = 100.0 * hits / sym->hist_sum;
 728
 729                 color = get_percent_color(percent);
 730
 731                 /*
 732                  * Also color the filename and line if needed, with
 733                  * the same color than the percentage. Don't print it
 734                  * twice for close colored ip with the same filename:line
 735                  */
 736                 if (path) {
 737                         if (!prev_line || strcmp(prev_line, path)
 738                                        || color != prev_color) {
 739                                 color_fprintf(stdout, color, " %s", path);
 740                                 prev_line = path;
 741                                 prev_color = color;
 742                         }
 743                 }
 744
 745                 color_fprintf(stdout, color, " %7.2f", percent);
 746                 printf(" :      ");
 747                 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
 748         } else {
 749                 if (!*line)
 750                         printf("         :\n");
 751                 else
 752                         printf("         :      %s\n", line);
 753         }
 754
 755         return 0;
 756 }
 757
 758 static struct rb_root root_sym_ext;
 759
 760 static void insert_source_line(struct sym_ext *sym_ext)
 761 {
 762         struct sym_ext *iter;
 763         struct rb_node **p = &root_sym_ext.rb_node;
 764         struct rb_node *parent = NULL;
 765
 766         while (*p != NULL) {
 767                 parent = *p;
 768                 iter = rb_entry(parent, struct sym_ext, node);
 769
 770                 if (sym_ext->percent > iter->percent)
 771                         p = &(*p)->rb_left;
 772                 else
 773                         p = &(*p)->rb_right;
 774         }
 775
 776         rb_link_node(&sym_ext->node, parent, p);
 777         rb_insert_color(&sym_ext->node, &root_sym_ext);
 778 }
 779
 780 static void free_source_line(struct symbol *sym, int len)
 781 {
 782         struct sym_ext *sym_ext = sym->priv;
 783         int i;
 784
 785         if (!sym_ext)
 786                 return;
 787
 788         for (i = 0; i < len; i++)
 789                 free(sym_ext[i].path);
 790         free(sym_ext);
 791
 792         sym->priv = NULL;
 793         root_sym_ext = RB_ROOT;
 794 }
 795
 796 /* Get the filename:line for the colored entries */
 797 static void
 798 get_source_line(struct symbol *sym, u64 start, int len, const char *filename)
 799 {
 800         int i;
 801         char cmd[PATH_MAX * 2];
 802         struct sym_ext *sym_ext;
 803
 804         if (!sym->hist_sum)
 805                 return;
 806
 807         sym->priv = calloc(len, sizeof(struct sym_ext));
 808         if (!sym->priv)
 809                 return;
 810
 811         sym_ext = sym->priv;
 812
 813         for (i = 0; i < len; i++) {
 814                 char *path = NULL;
 815                 size_t line_len;
 816                 u64 offset;
 817                 FILE *fp;
 818
 819                 sym_ext[i].percent = 100.0 * sym->hist[i] / sym->hist_sum;
 820                 if (sym_ext[i].percent <= 0.5)
 821                         continue;
 822
 823                 offset = start + i;
 824                 sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
 825                 fp = popen(cmd, "r");
 826                 if (!fp)
 827                         continue;
 828
 829                 if (getline(&path, &line_len, fp) < 0 || !line_len)
 830                         goto next;
 831
 832                 sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
 833                 if (!sym_ext[i].path)
 834                         goto next;
 835
 836                 strcpy(sym_ext[i].path, path);
 837                 insert_source_line(&sym_ext[i]);
 838
 839         next:
 840                 pclose(fp);
 841         }
 842 }
 843
 844 static void print_summary(const char *filename)
 845 {
 846         struct sym_ext *sym_ext;
 847         struct rb_node *node;
 848
 849         printf("\nSorted summary for file %s\n", filename);
 850         printf("----------------------------------------------\n\n");
 851
 852         if (RB_EMPTY_ROOT(&root_sym_ext)) {
 853                 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
 854                 return;
 855         }
 856
 857         node = rb_first(&root_sym_ext);
 858         while (node) {
 859                 double percent;
 860                 const char *color;
 861                 char *path;
 862
 863                 sym_ext = rb_entry(node, struct sym_ext, node);
 864                 percent = sym_ext->percent;
 865                 color = get_percent_color(percent);
 866                 path = sym_ext->path;
 867
 868                 color_fprintf(stdout, color, " %7.2f %s", percent, path);
 869                 node = rb_next(node);
 870         }
 871 }
 872
 873 static void annotate_sym(struct dso *dso, struct symbol *sym)
 874 {
 875         const char *filename = dso->name, *d_filename;
 876         u64 start, end, len;
 877         char command[PATH_MAX*2];
 878         FILE *file;
 879
 880         if (!filename)
 881                 return;
 882         if (sym->module)
 883                 filename = sym->module->path;
 884         else if (dso == kernel_dso)
 885                 filename = vmlinux_name;
 886
 887         start = sym->obj_start;
 888         if (!start)
 889                 start = sym->start;
 890         if (full_paths)
 891                 d_filename = filename;
 892         else
 893                 d_filename = basename(filename);
 894
 895         end = start + sym->end - sym->start + 1;
 896         len = sym->end - sym->start;
 897
 898         if (print_line) {
 899                 get_source_line(sym, start, len, filename);
 900                 print_summary(filename);
 901         }
 902
 903         printf("\n\n------------------------------------------------\n");
 904         printf(" Percent |      Source code & Disassembly of %s\n", d_filename);
 905         printf("------------------------------------------------\n");
 906
 907         if (verbose >= 2)
 908                 printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
 909
 910         sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
 911                         (u64)start, (u64)end, filename, filename);
 912
 913         if (verbose >= 3)
 914                 printf("doing: %s\n", command);
 915
 916         file = popen(command, "r");
 917         if (!file)
 918                 return;
 919
 920         while (!feof(file)) {
 921                 if (parse_line(file, sym, start, len) < 0)
 922                         break;
 923         }
 924
 925         pclose(file);
 926         if (print_line)
 927                 free_source_line(sym, len);
 928 }
 929
 930 static void find_annotations(void)
 931 {
 932         struct rb_node *nd;
 933         struct dso *dso;
 934         int count = 0;
 935
 936         list_for_each_entry(dso, &dsos, node) {
 937
 938                 for (nd = rb_first(&dso->syms); nd; nd = rb_next(nd)) {
 939                         struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
 940
 941                         if (sym->hist) {
 942                                 annotate_sym(dso, sym);
 943                                 count++;
 944                         }
 945                 }
 946         }
 947
 948         if (!count)
 949                 printf(" Error: symbol '%s' not present amongst the samples.\n", sym_hist_filter);
 950 }
 951
 952 static int __cmd_annotate(void)
 953 {
 954         int ret, rc = EXIT_FAILURE;
 955         unsigned long offset = 0;
 956         unsigned long head = 0;
 957         struct stat input_stat;
 958         event_t *event;
 959         uint32_t size;
 960         char *buf;
 961
 962         register_idle_thread(&threads, &last_match);
 963
 964         input = open(input_name, O_RDONLY);
 965         if (input < 0) {
 966                 perror("failed to open file");
 967                 exit(-1);
 968         }
 969
 970         ret = fstat(input, &input_stat);
 971         if (ret < 0) {
 972                 perror("failed to stat file");
 973                 exit(-1);
 974         }
 975
 976         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
 977                 fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
 978                 exit(-1);
 979         }
 980
 981         if (!input_stat.st_size) {
 982                 fprintf(stderr, "zero-sized file, nothing to do!\n");
 983                 exit(0);
 984         }
 985
 986         if (load_kernel() < 0) {
 987                 perror("failed to load kernel symbols");
 988                 return EXIT_FAILURE;
 989         }
 990
 991 remap:
 992         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
 993                            MAP_SHARED, input, offset);
 994         if (buf == MAP_FAILED) {
 995                 perror("failed to mmap file");
 996                 exit(-1);
 997         }
 998
 999 more:
1000         event = (event_t *)(buf + head);
1001
1002         size = event->header.size;
1003         if (!size)
1004                 size = 8;
1005
1006         if (head + event->header.size >= page_size * mmap_window) {
1007                 unsigned long shift = page_size * (head / page_size);
1008                 int munmap_ret;
1009
1010                 munmap_ret = munmap(buf, page_size * mmap_window);
1011                 assert(munmap_ret == 0);
1012
1013                 offset += shift;
1014                 head -= shift;
1015                 goto remap;
1016         }
1017
1018         size = event->header.size;
1019
1020         dump_printf("%p [%p]: event: %d\n",
1021                         (void *)(offset + head),
1022                         (void *)(long)event->header.size,
1023                         event->header.type);
1024
1025         if (!size || process_event(event, offset, head) < 0) {
1026
1027                 dump_printf("%p [%p]: skipping unknown header type: %d\n",
1028                         (void *)(offset + head),
1029                         (void *)(long)(event->header.size),
1030                         event->header.type);
1031
1032                 total_unknown++;
1033
1034                 /*
1035                  * assume we lost track of the stream, check alignment, and
1036                  * increment a single u64 in the hope to catch on again 'soon'.
1037                  */
1038
1039                 if (unlikely(head & 7))
1040                         head &= ~7ULL;
1041
1042                 size = 8;
1043         }
1044
1045         head += size;
1046
1047         if (offset + head < (unsigned long)input_stat.st_size)
1048                 goto more;
1049
1050         rc = EXIT_SUCCESS;
1051         close(input);
1052
1053         dump_printf("      IP events: %10ld\n", total);
1054         dump_printf("    mmap events: %10ld\n", total_mmap);
1055         dump_printf("    comm events: %10ld\n", total_comm);
1056         dump_printf("    fork events: %10ld\n", total_fork);
1057         dump_printf(" unknown events: %10ld\n", total_unknown);
1058
1059         if (dump_trace)
1060                 return 0;
1061
1062         if (verbose >= 3)
1063                 threads__fprintf(stdout, &threads);
1064
1065         if (verbose >= 2)
1066                 dsos__fprintf(stdout);
1067
1068         collapse__resort();
1069         output__resort();
1070
1071         find_annotations();
1072
1073         return rc;
1074 }
1075
1076 static const char * const annotate_usage[] = {
1077         "perf annotate [<options>] <command>",
1078         NULL
1079 };
1080
1081 static const struct option options[] = {
1082         OPT_STRING('i', "input", &input_name, "file",
1083                     "input file name"),
1084         OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
1085                     "symbol to annotate"),
1086         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
1087         OPT_BOOLEAN('v', "verbose", &verbose,
1088                     "be more verbose (show symbol address, etc)"),
1089         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1090                     "dump raw trace in ASCII"),
1091         OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"),
1092         OPT_BOOLEAN('m', "modules", &modules,
1093                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
1094         OPT_BOOLEAN('l', "print-line", &print_line,
1095                     "print matching source lines (may be slow)"),
1096         OPT_BOOLEAN('P', "full-paths", &full_paths,
1097                     "Don't shorten the displayed pathnames"),
1098         OPT_END()
1099 };
1100
1101 static void setup_sorting(void)
1102 {
1103         char *tmp, *tok, *str = strdup(sort_order);
1104
1105         for (tok = strtok_r(str, ", ", &tmp);
1106                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1107                 if (sort_dimension__add(tok) < 0) {
1108                         error("Unknown --sort key: `%s'", tok);
1109                         usage_with_options(annotate_usage, options);
1110                 }
1111         }
1112
1113         free(str);
1114 }
1115
1116 int cmd_annotate(int argc, const char **argv, const char *prefix __used)
1117 {
1118         symbol__init();
1119
1120         page_size = getpagesize();
1121
1122         argc = parse_options(argc, argv, options, annotate_usage, 0);
1123
1124         setup_sorting();
1125
1126         if (argc) {
1127                 /*
1128                  * Special case: if there's an argument left then assume tha
1129                  * it's a symbol filter:
1130                  */
1131                 if (argc > 1)
1132                         usage_with_options(annotate_usage, options);
1133
1134                 sym_hist_filter = argv[0];
1135         }
1136
1137         if (!sym_hist_filter)
1138                 usage_with_options(annotate_usage, options);
1139
1140         setup_pager();
1141
1142         return __cmd_annotate();
1143 }