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
  21 #include "util/parse-options.h"
  22 #include "util/parse-events.h"
  23
  24 #define SHOW_KERNEL     1
  25 #define SHOW_USER       2
  26 #define SHOW_HV         4
  27
  28 static char             const *input_name = "perf.data";
  29 static char             *vmlinux = "vmlinux";
  30
  31 static char             default_sort_order[] = "comm,symbol";
  32 static char             *sort_order = default_sort_order;
  33
  34 static int              input;
  35 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
  36
  37 static int              dump_trace = 0;
  38 #define dprintf(x...)   do { if (dump_trace) printf(x); } while (0)
  39
  40 static int              verbose;
  41
  42 static int              modules;
  43
  44 static int              full_paths;
  45
  46 static int              print_line;
  47
  48 static unsigned long    page_size;
  49 static unsigned long    mmap_window = 32;
  50
  51 struct ip_event {
  52         struct perf_event_header header;
  53         u64 ip;
  54         u32 pid, tid;
  55 };
  56
  57 struct mmap_event {
  58         struct perf_event_header header;
  59         u32 pid, tid;
  60         u64 start;
  61         u64 len;
  62         u64 pgoff;
  63         char filename[PATH_MAX];
  64 };
  65
  66 struct comm_event {
  67         struct perf_event_header header;
  68         u32 pid, tid;
  69         char comm[16];
  70 };
  71
  72 struct fork_event {
  73         struct perf_event_header header;
  74         u32 pid, ppid;
  75 };
  76
  77 typedef union event_union {
  78         struct perf_event_header        header;
  79         struct ip_event                 ip;
  80         struct mmap_event               mmap;
  81         struct comm_event               comm;
  82         struct fork_event               fork;
  83 } event_t;
  84
  85
  86 struct sym_ext {
  87         struct rb_node  node;
  88         double          percent;
  89         char            *path;
  90 };
  91
  92 static LIST_HEAD(dsos);
  93 static struct dso *kernel_dso;
  94 static struct dso *vdso;
  95
  96
  97 static void dsos__add(struct dso *dso)
  98 {
  99         list_add_tail(&dso->node, &dsos);
 100 }
 101
 102 static struct dso *dsos__find(const char *name)
 103 {
 104         struct dso *pos;
 105
 106         list_for_each_entry(pos, &dsos, node)
 107                 if (strcmp(pos->name, name) == 0)
 108                         return pos;
 109         return NULL;
 110 }
 111
 112 static struct dso *dsos__findnew(const char *name)
 113 {
 114         struct dso *dso = dsos__find(name);
 115         int nr;
 116
 117         if (dso)
 118                 return dso;
 119
 120         dso = dso__new(name, 0);
 121         if (!dso)
 122                 goto out_delete_dso;
 123
 124         nr = dso__load(dso, NULL, verbose);
 125         if (nr < 0) {
 126                 if (verbose)
 127                         fprintf(stderr, "Failed to open: %s\n", name);
 128                 goto out_delete_dso;
 129         }
 130         if (!nr && verbose) {
 131                 fprintf(stderr,
 132                 "No symbols found in: %s, maybe install a debug package?\n",
 133                                 name);
 134         }
 135
 136         dsos__add(dso);
 137
 138         return dso;
 139
 140 out_delete_dso:
 141         dso__delete(dso);
 142         return NULL;
 143 }
 144
 145 static void dsos__fprintf(FILE *fp)
 146 {
 147         struct dso *pos;
 148
 149         list_for_each_entry(pos, &dsos, node)
 150                 dso__fprintf(pos, fp);
 151 }
 152
 153 static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip)
 154 {
 155         return dso__find_symbol(dso, ip);
 156 }
 157
 158 static int load_kernel(void)
 159 {
 160         int err;
 161
 162         kernel_dso = dso__new("[kernel]", 0);
 163         if (!kernel_dso)
 164                 return -1;
 165
 166         err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, modules);
 167         if (err <= 0) {
 168                 dso__delete(kernel_dso);
 169                 kernel_dso = NULL;
 170         } else
 171                 dsos__add(kernel_dso);
 172
 173         vdso = dso__new("[vdso]", 0);
 174         if (!vdso)
 175                 return -1;
 176
 177         vdso->find_symbol = vdso__find_symbol;
 178
 179         dsos__add(vdso);
 180
 181         return err;
 182 }
 183
 184 struct map {
 185         struct list_head node;
 186         u64      start;
 187         u64      end;
 188         u64      pgoff;
 189         u64      (*map_ip)(struct map *, u64);
 190         struct dso       *dso;
 191 };
 192
 193 static u64 map__map_ip(struct map *map, u64 ip)
 194 {
 195         return ip - map->start + map->pgoff;
 196 }
 197
 198 static u64 vdso__map_ip(struct map *map __used, u64 ip)
 199 {
 200         return ip;
 201 }
 202
 203 static struct map *map__new(struct mmap_event *event)
 204 {
 205         struct map *self = malloc(sizeof(*self));
 206
 207         if (self != NULL) {
 208                 const char *filename = event->filename;
 209
 210                 self->start = event->start;
 211                 self->end   = event->start + event->len;
 212                 self->pgoff = event->pgoff;
 213
 214                 self->dso = dsos__findnew(filename);
 215                 if (self->dso == NULL)
 216                         goto out_delete;
 217
 218                 if (self->dso == vdso)
 219                         self->map_ip = vdso__map_ip;
 220                 else
 221                         self->map_ip = map__map_ip;
 222         }
 223         return self;
 224 out_delete:
 225         free(self);
 226         return NULL;
 227 }
 228
 229 static struct map *map__clone(struct map *self)
 230 {
 231         struct map *map = malloc(sizeof(*self));
 232
 233         if (!map)
 234                 return NULL;
 235
 236         memcpy(map, self, sizeof(*self));
 237
 238         return map;
 239 }
 240
 241 static int map__overlap(struct map *l, struct map *r)
 242 {
 243         if (l->start > r->start) {
 244                 struct map *t = l;
 245                 l = r;
 246                 r = t;
 247         }
 248
 249         if (l->end > r->start)
 250                 return 1;
 251
 252         return 0;
 253 }
 254
 255 static size_t map__fprintf(struct map *self, FILE *fp)
 256 {
 257         return fprintf(fp, " %Lx-%Lx %Lx %s\n",
 258                        self->start, self->end, self->pgoff, self->dso->name);
 259 }
 260
 261
 262 struct thread {
 263         struct rb_node   rb_node;
 264         struct list_head maps;
 265         pid_t            pid;
 266         char             *comm;
 267 };
 268
 269 static struct thread *thread__new(pid_t pid)
 270 {
 271         struct thread *self = malloc(sizeof(*self));
 272
 273         if (self != NULL) {
 274                 self->pid = pid;
 275                 self->comm = malloc(32);
 276                 if (self->comm)
 277                         snprintf(self->comm, 32, ":%d", self->pid);
 278                 INIT_LIST_HEAD(&self->maps);
 279         }
 280
 281         return self;
 282 }
 283
 284 static int thread__set_comm(struct thread *self, const char *comm)
 285 {
 286         if (self->comm)
 287                 free(self->comm);
 288         self->comm = strdup(comm);
 289         return self->comm ? 0 : -ENOMEM;
 290 }
 291
 292 static size_t thread__fprintf(struct thread *self, FILE *fp)
 293 {
 294         struct map *pos;
 295         size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
 296
 297         list_for_each_entry(pos, &self->maps, node)
 298                 ret += map__fprintf(pos, fp);
 299
 300         return ret;
 301 }
 302
 303
 304 static struct rb_root threads;
 305 static struct thread *last_match;
 306
 307 static struct thread *threads__findnew(pid_t pid)
 308 {
 309         struct rb_node **p = &threads.rb_node;
 310         struct rb_node *parent = NULL;
 311         struct thread *th;
 312
 313         /*
 314          * Font-end cache - PID lookups come in blocks,
 315          * so most of the time we dont have to look up
 316          * the full rbtree:
 317          */
 318         if (last_match && last_match->pid == pid)
 319                 return last_match;
 320
 321         while (*p != NULL) {
 322                 parent = *p;
 323                 th = rb_entry(parent, struct thread, rb_node);
 324
 325                 if (th->pid == pid) {
 326                         last_match = th;
 327                         return th;
 328                 }
 329
 330                 if (pid < th->pid)
 331                         p = &(*p)->rb_left;
 332                 else
 333                         p = &(*p)->rb_right;
 334         }
 335
 336         th = thread__new(pid);
 337         if (th != NULL) {
 338                 rb_link_node(&th->rb_node, parent, p);
 339                 rb_insert_color(&th->rb_node, &threads);
 340                 last_match = th;
 341         }
 342
 343         return th;
 344 }
 345
 346 static void thread__insert_map(struct thread *self, struct map *map)
 347 {
 348         struct map *pos, *tmp;
 349
 350         list_for_each_entry_safe(pos, tmp, &self->maps, node) {
 351                 if (map__overlap(pos, map)) {
 352                         list_del_init(&pos->node);
 353                         /* XXX leaks dsos */
 354                         free(pos);
 355                 }
 356         }
 357
 358         list_add_tail(&map->node, &self->maps);
 359 }
 360
 361 static int thread__fork(struct thread *self, struct thread *parent)
 362 {
 363         struct map *map;
 364
 365         if (self->comm)
 366                 free(self->comm);
 367         self->comm = strdup(parent->comm);
 368         if (!self->comm)
 369                 return -ENOMEM;
 370
 371         list_for_each_entry(map, &parent->maps, node) {
 372                 struct map *new = map__clone(map);
 373                 if (!new)
 374                         return -ENOMEM;
 375                 thread__insert_map(self, new);
 376         }
 377
 378         return 0;
 379 }
 380
 381 static struct map *thread__find_map(struct thread *self, u64 ip)
 382 {
 383         struct map *pos;
 384
 385         if (self == NULL)
 386                 return NULL;
 387
 388         list_for_each_entry(pos, &self->maps, node)
 389                 if (ip >= pos->start && ip <= pos->end)
 390                         return pos;
 391
 392         return NULL;
 393 }
 394
 395 static size_t threads__fprintf(FILE *fp)
 396 {
 397         size_t ret = 0;
 398         struct rb_node *nd;
 399
 400         for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
 401                 struct thread *pos = rb_entry(nd, struct thread, rb_node);
 402
 403                 ret += thread__fprintf(pos, fp);
 404         }
 405
 406         return ret;
 407 }
 408
 409 /*
 410  * histogram, sorted on item, collects counts
 411  */
 412
 413 static struct rb_root hist;
 414
 415 struct hist_entry {
 416         struct rb_node   rb_node;
 417
 418         struct thread    *thread;
 419         struct map       *map;
 420         struct dso       *dso;
 421         struct symbol    *sym;
 422         u64      ip;
 423         char             level;
 424
 425         uint32_t         count;
 426 };
 427
 428 /*
 429  * configurable sorting bits
 430  */
 431
 432 struct sort_entry {
 433         struct list_head list;
 434
 435         char *header;
 436
 437         int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
 438         int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
 439         size_t  (*print)(FILE *fp, struct hist_entry *);
 440 };
 441
 442 /* --sort pid */
 443
 444 static int64_t
 445 sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
 446 {
 447         return right->thread->pid - left->thread->pid;
 448 }
 449
 450 static size_t
 451 sort__thread_print(FILE *fp, struct hist_entry *self)
 452 {
 453         return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
 454 }
 455
 456 static struct sort_entry sort_thread = {
 457         .header = "         Command:  Pid",
 458         .cmp    = sort__thread_cmp,
 459         .print  = sort__thread_print,
 460 };
 461
 462 /* --sort comm */
 463
 464 static int64_t
 465 sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
 466 {
 467         return right->thread->pid - left->thread->pid;
 468 }
 469
 470 static int64_t
 471 sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
 472 {
 473         char *comm_l = left->thread->comm;
 474         char *comm_r = right->thread->comm;
 475
 476         if (!comm_l || !comm_r) {
 477                 if (!comm_l && !comm_r)
 478                         return 0;
 479                 else if (!comm_l)
 480                         return -1;
 481                 else
 482                         return 1;
 483         }
 484
 485         return strcmp(comm_l, comm_r);
 486 }
 487
 488 static size_t
 489 sort__comm_print(FILE *fp, struct hist_entry *self)
 490 {
 491         return fprintf(fp, "%16s", self->thread->comm);
 492 }
 493
 494 static struct sort_entry sort_comm = {
 495         .header         = "         Command",
 496         .cmp            = sort__comm_cmp,
 497         .collapse       = sort__comm_collapse,
 498         .print          = sort__comm_print,
 499 };
 500
 501 /* --sort dso */
 502
 503 static int64_t
 504 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 505 {
 506         struct dso *dso_l = left->dso;
 507         struct dso *dso_r = right->dso;
 508
 509         if (!dso_l || !dso_r) {
 510                 if (!dso_l && !dso_r)
 511                         return 0;
 512                 else if (!dso_l)
 513                         return -1;
 514                 else
 515                         return 1;
 516         }
 517
 518         return strcmp(dso_l->name, dso_r->name);
 519 }
 520
 521 static size_t
 522 sort__dso_print(FILE *fp, struct hist_entry *self)
 523 {
 524         if (self->dso)
 525                 return fprintf(fp, "%-25s", self->dso->name);
 526
 527         return fprintf(fp, "%016llx         ", (u64)self->ip);
 528 }
 529
 530 static struct sort_entry sort_dso = {
 531         .header = "Shared Object            ",
 532         .cmp    = sort__dso_cmp,
 533         .print  = sort__dso_print,
 534 };
 535
 536 /* --sort symbol */
 537
 538 static int64_t
 539 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 540 {
 541         u64 ip_l, ip_r;
 542
 543         if (left->sym == right->sym)
 544                 return 0;
 545
 546         ip_l = left->sym ? left->sym->start : left->ip;
 547         ip_r = right->sym ? right->sym->start : right->ip;
 548
 549         return (int64_t)(ip_r - ip_l);
 550 }
 551
 552 static size_t
 553 sort__sym_print(FILE *fp, struct hist_entry *self)
 554 {
 555         size_t ret = 0;
 556
 557         if (verbose)
 558                 ret += fprintf(fp, "%#018llx  ", (u64)self->ip);
 559
 560         if (self->sym) {
 561                 ret += fprintf(fp, "[%c] %s",
 562                         self->dso == kernel_dso ? 'k' : '.', self->sym->name);
 563         } else {
 564                 ret += fprintf(fp, "%#016llx", (u64)self->ip);
 565         }
 566
 567         return ret;
 568 }
 569
 570 static struct sort_entry sort_sym = {
 571         .header = "Symbol",
 572         .cmp    = sort__sym_cmp,
 573         .print  = sort__sym_print,
 574 };
 575
 576 static int sort__need_collapse = 0;
 577
 578 struct sort_dimension {
 579         char                    *name;
 580         struct sort_entry       *entry;
 581         int                     taken;
 582 };
 583
 584 static struct sort_dimension sort_dimensions[] = {
 585         { .name = "pid",        .entry = &sort_thread,  },
 586         { .name = "comm",       .entry = &sort_comm,    },
 587         { .name = "dso",        .entry = &sort_dso,     },
 588         { .name = "symbol",     .entry = &sort_sym,     },
 589 };
 590
 591 static LIST_HEAD(hist_entry__sort_list);
 592
 593 static int sort_dimension__add(char *tok)
 594 {
 595         unsigned int i;
 596
 597         for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
 598                 struct sort_dimension *sd = &sort_dimensions[i];
 599
 600                 if (sd->taken)
 601                         continue;
 602
 603                 if (strncasecmp(tok, sd->name, strlen(tok)))
 604                         continue;
 605
 606                 if (sd->entry->collapse)
 607                         sort__need_collapse = 1;
 608
 609                 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
 610                 sd->taken = 1;
 611
 612                 return 0;
 613         }
 614
 615         return -ESRCH;
 616 }
 617
 618 static int64_t
 619 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 620 {
 621         struct sort_entry *se;
 622         int64_t cmp = 0;
 623
 624         list_for_each_entry(se, &hist_entry__sort_list, list) {
 625                 cmp = se->cmp(left, right);
 626                 if (cmp)
 627                         break;
 628         }
 629
 630         return cmp;
 631 }
 632
 633 static int64_t
 634 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 635 {
 636         struct sort_entry *se;
 637         int64_t cmp = 0;
 638
 639         list_for_each_entry(se, &hist_entry__sort_list, list) {
 640                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 641
 642                 f = se->collapse ?: se->cmp;
 643
 644                 cmp = f(left, right);
 645                 if (cmp)
 646                         break;
 647         }
 648
 649         return cmp;
 650 }
 651
 652 /*
 653  * collect histogram counts
 654  */
 655 static void hist_hit(struct hist_entry *he, u64 ip)
 656 {
 657         unsigned int sym_size, offset;
 658         struct symbol *sym = he->sym;
 659
 660         he->count++;
 661
 662         if (!sym || !sym->hist)
 663                 return;
 664
 665         sym_size = sym->end - sym->start;
 666         offset = ip - sym->start;
 667
 668         if (offset >= sym_size)
 669                 return;
 670
 671         sym->hist_sum++;
 672         sym->hist[offset]++;
 673
 674         if (verbose >= 3)
 675                 printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
 676                         (void *)(unsigned long)he->sym->start,
 677                         he->sym->name,
 678                         (void *)(unsigned long)ip, ip - he->sym->start,
 679                         sym->hist[offset]);
 680 }
 681
 682 static int
 683 hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
 684                 struct symbol *sym, u64 ip, char level)
 685 {
 686         struct rb_node **p = &hist.rb_node;
 687         struct rb_node *parent = NULL;
 688         struct hist_entry *he;
 689         struct hist_entry entry = {
 690                 .thread = thread,
 691                 .map    = map,
 692                 .dso    = dso,
 693                 .sym    = sym,
 694                 .ip     = ip,
 695                 .level  = level,
 696                 .count  = 1,
 697         };
 698         int cmp;
 699
 700         while (*p != NULL) {
 701                 parent = *p;
 702                 he = rb_entry(parent, struct hist_entry, rb_node);
 703
 704                 cmp = hist_entry__cmp(&entry, he);
 705
 706                 if (!cmp) {
 707                         hist_hit(he, ip);
 708
 709                         return 0;
 710                 }
 711
 712                 if (cmp < 0)
 713                         p = &(*p)->rb_left;
 714                 else
 715                         p = &(*p)->rb_right;
 716         }
 717
 718         he = malloc(sizeof(*he));
 719         if (!he)
 720                 return -ENOMEM;
 721         *he = entry;
 722         rb_link_node(&he->rb_node, parent, p);
 723         rb_insert_color(&he->rb_node, &hist);
 724
 725         return 0;
 726 }
 727
 728 static void hist_entry__free(struct hist_entry *he)
 729 {
 730         free(he);
 731 }
 732
 733 /*
 734  * collapse the histogram
 735  */
 736
 737 static struct rb_root collapse_hists;
 738
 739 static void collapse__insert_entry(struct hist_entry *he)
 740 {
 741         struct rb_node **p = &collapse_hists.rb_node;
 742         struct rb_node *parent = NULL;
 743         struct hist_entry *iter;
 744         int64_t cmp;
 745
 746         while (*p != NULL) {
 747                 parent = *p;
 748                 iter = rb_entry(parent, struct hist_entry, rb_node);
 749
 750                 cmp = hist_entry__collapse(iter, he);
 751
 752                 if (!cmp) {
 753                         iter->count += he->count;
 754                         hist_entry__free(he);
 755                         return;
 756                 }
 757
 758                 if (cmp < 0)
 759                         p = &(*p)->rb_left;
 760                 else
 761                         p = &(*p)->rb_right;
 762         }
 763
 764         rb_link_node(&he->rb_node, parent, p);
 765         rb_insert_color(&he->rb_node, &collapse_hists);
 766 }
 767
 768 static void collapse__resort(void)
 769 {
 770         struct rb_node *next;
 771         struct hist_entry *n;
 772
 773         if (!sort__need_collapse)
 774                 return;
 775
 776         next = rb_first(&hist);
 777         while (next) {
 778                 n = rb_entry(next, struct hist_entry, rb_node);
 779                 next = rb_next(&n->rb_node);
 780
 781                 rb_erase(&n->rb_node, &hist);
 782                 collapse__insert_entry(n);
 783         }
 784 }
 785
 786 /*
 787  * reverse the map, sort on count.
 788  */
 789
 790 static struct rb_root output_hists;
 791
 792 static void output__insert_entry(struct hist_entry *he)
 793 {
 794         struct rb_node **p = &output_hists.rb_node;
 795         struct rb_node *parent = NULL;
 796         struct hist_entry *iter;
 797
 798         while (*p != NULL) {
 799                 parent = *p;
 800                 iter = rb_entry(parent, struct hist_entry, rb_node);
 801
 802                 if (he->count > iter->count)
 803                         p = &(*p)->rb_left;
 804                 else
 805                         p = &(*p)->rb_right;
 806         }
 807
 808         rb_link_node(&he->rb_node, parent, p);
 809         rb_insert_color(&he->rb_node, &output_hists);
 810 }
 811
 812 static void output__resort(void)
 813 {
 814         struct rb_node *next;
 815         struct hist_entry *n;
 816         struct rb_root *tree = &hist;
 817
 818         if (sort__need_collapse)
 819                 tree = &collapse_hists;
 820
 821         next = rb_first(tree);
 822
 823         while (next) {
 824                 n = rb_entry(next, struct hist_entry, rb_node);
 825                 next = rb_next(&n->rb_node);
 826
 827                 rb_erase(&n->rb_node, tree);
 828                 output__insert_entry(n);
 829         }
 830 }
 831
 832 static void register_idle_thread(void)
 833 {
 834         struct thread *thread = threads__findnew(0);
 835
 836         if (thread == NULL ||
 837                         thread__set_comm(thread, "[idle]")) {
 838                 fprintf(stderr, "problem inserting idle task.\n");
 839                 exit(-1);
 840         }
 841 }
 842
 843 static unsigned long total = 0,
 844                      total_mmap = 0,
 845                      total_comm = 0,
 846                      total_fork = 0,
 847                      total_unknown = 0;
 848
 849 static int
 850 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
 851 {
 852         char level;
 853         int show = 0;
 854         struct dso *dso = NULL;
 855         struct thread *thread = threads__findnew(event->ip.pid);
 856         u64 ip = event->ip.ip;
 857         struct map *map = NULL;
 858
 859         dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
 860                 (void *)(offset + head),
 861                 (void *)(long)(event->header.size),
 862                 event->header.misc,
 863                 event->ip.pid,
 864                 (void *)(long)ip);
 865
 866         dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 867
 868         if (thread == NULL) {
 869                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 870                         event->header.type);
 871                 return -1;
 872         }
 873
 874         if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
 875                 show = SHOW_KERNEL;
 876                 level = 'k';
 877
 878                 dso = kernel_dso;
 879
 880                 dprintf(" ...... dso: %s\n", dso->name);
 881
 882         } else if (event->header.misc & PERF_EVENT_MISC_USER) {
 883
 884                 show = SHOW_USER;
 885                 level = '.';
 886
 887                 map = thread__find_map(thread, ip);
 888                 if (map != NULL) {
 889                         ip = map->map_ip(map, ip);
 890                         dso = map->dso;
 891                 } else {
 892                         /*
 893                          * If this is outside of all known maps,
 894                          * and is a negative address, try to look it
 895                          * up in the kernel dso, as it might be a
 896                          * vsyscall (which executes in user-mode):
 897                          */
 898                         if ((long long)ip < 0)
 899                                 dso = kernel_dso;
 900                 }
 901                 dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
 902
 903         } else {
 904                 show = SHOW_HV;
 905                 level = 'H';
 906                 dprintf(" ...... dso: [hypervisor]\n");
 907         }
 908
 909         if (show & show_mask) {
 910                 struct symbol *sym = NULL;
 911
 912                 if (dso)
 913                         sym = dso->find_symbol(dso, ip);
 914
 915                 if (hist_entry__add(thread, map, dso, sym, ip, level)) {
 916                         fprintf(stderr,
 917                 "problem incrementing symbol count, skipping event\n");
 918                         return -1;
 919                 }
 920         }
 921         total++;
 922
 923         return 0;
 924 }
 925
 926 static int
 927 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 928 {
 929         struct thread *thread = threads__findnew(event->mmap.pid);
 930         struct map *map = map__new(&event->mmap);
 931
 932         dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
 933                 (void *)(offset + head),
 934                 (void *)(long)(event->header.size),
 935                 event->mmap.pid,
 936                 (void *)(long)event->mmap.start,
 937                 (void *)(long)event->mmap.len,
 938                 (void *)(long)event->mmap.pgoff,
 939                 event->mmap.filename);
 940
 941         if (thread == NULL || map == NULL) {
 942                 dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
 943                 return 0;
 944         }
 945
 946         thread__insert_map(thread, map);
 947         total_mmap++;
 948
 949         return 0;
 950 }
 951
 952 static int
 953 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
 954 {
 955         struct thread *thread = threads__findnew(event->comm.pid);
 956
 957         dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
 958                 (void *)(offset + head),
 959                 (void *)(long)(event->header.size),
 960                 event->comm.comm, event->comm.pid);
 961
 962         if (thread == NULL ||
 963             thread__set_comm(thread, event->comm.comm)) {
 964                 dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
 965                 return -1;
 966         }
 967         total_comm++;
 968
 969         return 0;
 970 }
 971
 972 static int
 973 process_fork_event(event_t *event, unsigned long offset, unsigned long head)
 974 {
 975         struct thread *thread = threads__findnew(event->fork.pid);
 976         struct thread *parent = threads__findnew(event->fork.ppid);
 977
 978         dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
 979                 (void *)(offset + head),
 980                 (void *)(long)(event->header.size),
 981                 event->fork.pid, event->fork.ppid);
 982
 983         if (!thread || !parent || thread__fork(thread, parent)) {
 984                 dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
 985                 return -1;
 986         }
 987         total_fork++;
 988
 989         return 0;
 990 }
 991
 992 static int
 993 process_event(event_t *event, unsigned long offset, unsigned long head)
 994 {
 995         switch (event->header.type) {
 996         case PERF_EVENT_SAMPLE:
 997                 return process_sample_event(event, offset, head);
 998
 999         case PERF_EVENT_MMAP:
1000                 return process_mmap_event(event, offset, head);
1001
1002         case PERF_EVENT_COMM:
1003                 return process_comm_event(event, offset, head);
1004
1005         case PERF_EVENT_FORK:
1006                 return process_fork_event(event, offset, head);
1007         /*
1008          * We dont process them right now but they are fine:
1009          */
1010
1011         case PERF_EVENT_THROTTLE:
1012         case PERF_EVENT_UNTHROTTLE:
1013                 return 0;
1014
1015         default:
1016                 return -1;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static int
1023 parse_line(FILE *file, struct symbol *sym, u64 start, u64 len)
1024 {
1025         char *line = NULL, *tmp, *tmp2;
1026         static const char *prev_line;
1027         static const char *prev_color;
1028         unsigned int offset;
1029         size_t line_len;
1030         s64 line_ip;
1031         int ret;
1032         char *c;
1033
1034         if (getline(&line, &line_len, file) < 0)
1035                 return -1;
1036         if (!line)
1037                 return -1;
1038
1039         c = strchr(line, '\n');
1040         if (c)
1041                 *c = 0;
1042
1043         line_ip = -1;
1044         offset = 0;
1045         ret = -2;
1046
1047         /*
1048          * Strip leading spaces:
1049          */
1050         tmp = line;
1051         while (*tmp) {
1052                 if (*tmp != ' ')
1053                         break;
1054                 tmp++;
1055         }
1056
1057         if (*tmp) {
1058                 /*
1059                  * Parse hexa addresses followed by ':'
1060                  */
1061                 line_ip = strtoull(tmp, &tmp2, 16);
1062                 if (*tmp2 != ':')
1063                         line_ip = -1;
1064         }
1065
1066         if (line_ip != -1) {
1067                 const char *path = NULL;
1068                 unsigned int hits = 0;
1069                 double percent = 0.0;
1070                 char *color;
1071                 struct sym_ext *sym_ext = sym->priv;
1072
1073                 offset = line_ip - start;
1074                 if (offset < len)
1075                         hits = sym->hist[offset];
1076
1077                 if (offset < len && sym_ext) {
1078                         path = sym_ext[offset].path;
1079                         percent = sym_ext[offset].percent;
1080                 } else if (sym->hist_sum)
1081                         percent = 100.0 * hits / sym->hist_sum;
1082
1083                 color = get_percent_color(percent);
1084
1085                 /*
1086                  * Also color the filename and line if needed, with
1087                  * the same color than the percentage. Don't print it
1088                  * twice for close colored ip with the same filename:line
1089                  */
1090                 if (path) {
1091                         if (!prev_line || strcmp(prev_line, path)
1092                                        || color != prev_color) {
1093                                 color_fprintf(stdout, color, " %s", path);
1094                                 prev_line = path;
1095                                 prev_color = color;
1096                         }
1097                 }
1098
1099                 color_fprintf(stdout, color, " %7.2f", percent);
1100                 printf(" :      ");
1101                 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
1102         } else {
1103                 if (!*line)
1104                         printf("         :\n");
1105                 else
1106                         printf("         :      %s\n", line);
1107         }
1108
1109         return 0;
1110 }
1111
1112 static struct rb_root root_sym_ext;
1113
1114 static void insert_source_line(struct sym_ext *sym_ext)
1115 {
1116         struct sym_ext *iter;
1117         struct rb_node **p = &root_sym_ext.rb_node;
1118         struct rb_node *parent = NULL;
1119
1120         while (*p != NULL) {
1121                 parent = *p;
1122                 iter = rb_entry(parent, struct sym_ext, node);
1123
1124                 if (sym_ext->percent > iter->percent)
1125                         p = &(*p)->rb_left;
1126                 else
1127                         p = &(*p)->rb_right;
1128         }
1129
1130         rb_link_node(&sym_ext->node, parent, p);
1131         rb_insert_color(&sym_ext->node, &root_sym_ext);
1132 }
1133
1134 static void free_source_line(struct symbol *sym, int len)
1135 {
1136         struct sym_ext *sym_ext = sym->priv;
1137         int i;
1138
1139         if (!sym_ext)
1140                 return;
1141
1142         for (i = 0; i < len; i++)
1143                 free(sym_ext[i].path);
1144         free(sym_ext);
1145
1146         sym->priv = NULL;
1147         root_sym_ext = RB_ROOT;
1148 }
1149
1150 /* Get the filename:line for the colored entries */
1151 static void
1152 get_source_line(struct symbol *sym, u64 start, int len, char *filename)
1153 {
1154         int i;
1155         char cmd[PATH_MAX * 2];
1156         struct sym_ext *sym_ext;
1157
1158         if (!sym->hist_sum)
1159                 return;
1160
1161         sym->priv = calloc(len, sizeof(struct sym_ext));
1162         if (!sym->priv)
1163                 return;
1164
1165         sym_ext = sym->priv;
1166
1167         for (i = 0; i < len; i++) {
1168                 char *path = NULL;
1169                 size_t line_len;
1170                 u64 offset;
1171                 FILE *fp;
1172
1173                 sym_ext[i].percent = 100.0 * sym->hist[i] / sym->hist_sum;
1174                 if (sym_ext[i].percent <= 0.5)
1175                         continue;
1176
1177                 offset = start + i;
1178                 sprintf(cmd, "addr2line -e %s %016llx", filename, offset);
1179                 fp = popen(cmd, "r");
1180                 if (!fp)
1181                         continue;
1182
1183                 if (getline(&path, &line_len, fp) < 0 || !line_len)
1184                         goto next;
1185
1186                 sym_ext[i].path = malloc(sizeof(char) * line_len + 1);
1187                 if (!sym_ext[i].path)
1188                         goto next;
1189
1190                 strcpy(sym_ext[i].path, path);
1191                 insert_source_line(&sym_ext[i]);
1192
1193         next:
1194                 pclose(fp);
1195         }
1196 }
1197
1198 static void print_summary(char *filename)
1199 {
1200         struct sym_ext *sym_ext;
1201         struct rb_node *node;
1202
1203         printf("\nSorted summary for file %s\n", filename);
1204         printf("----------------------------------------------\n\n");
1205
1206         if (RB_EMPTY_ROOT(&root_sym_ext)) {
1207                 printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
1208                 return;
1209         }
1210
1211         node = rb_first(&root_sym_ext);
1212         while (node) {
1213                 double percent;
1214                 char *color;
1215                 char *path;
1216
1217                 sym_ext = rb_entry(node, struct sym_ext, node);
1218                 percent = sym_ext->percent;
1219                 color = get_percent_color(percent);
1220                 path = sym_ext->path;
1221
1222                 color_fprintf(stdout, color, " %7.2f %s", percent, path);
1223                 node = rb_next(node);
1224         }
1225 }
1226
1227 static void annotate_sym(struct dso *dso, struct symbol *sym)
1228 {
1229         char *filename = dso->name, *d_filename;
1230         u64 start, end, len;
1231         char command[PATH_MAX*2];
1232         FILE *file;
1233
1234         if (!filename)
1235                 return;
1236         if (sym->module)
1237                 filename = sym->module->path;
1238         else if (dso == kernel_dso)
1239                 filename = vmlinux;
1240
1241         start = sym->obj_start;
1242         if (!start)
1243                 start = sym->start;
1244         if (full_paths)
1245                 d_filename = filename;
1246         else
1247                 d_filename = basename(filename);
1248
1249         end = start + sym->end - sym->start + 1;
1250         len = sym->end - sym->start;
1251
1252         if (print_line) {
1253                 get_source_line(sym, start, len, filename);
1254                 print_summary(filename);
1255         }
1256
1257         printf("\n\n------------------------------------------------\n");
1258         printf(" Percent |      Source code & Disassembly of %s\n", d_filename);
1259         printf("------------------------------------------------\n");
1260
1261         if (verbose >= 2)
1262                 printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
1263
1264         sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s|grep -v %s",
1265                         (u64)start, (u64)end, filename, filename);
1266
1267         if (verbose >= 3)
1268                 printf("doing: %s\n", command);
1269
1270         file = popen(command, "r");
1271         if (!file)
1272                 return;
1273
1274         while (!feof(file)) {
1275                 if (parse_line(file, sym, start, len) < 0)
1276                         break;
1277         }
1278
1279         pclose(file);
1280         if (print_line)
1281                 free_source_line(sym, len);
1282 }
1283
1284 static void find_annotations(void)
1285 {
1286         struct rb_node *nd;
1287         struct dso *dso;
1288         int count = 0;
1289
1290         list_for_each_entry(dso, &dsos, node) {
1291
1292                 for (nd = rb_first(&dso->syms); nd; nd = rb_next(nd)) {
1293                         struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
1294
1295                         if (sym->hist) {
1296                                 annotate_sym(dso, sym);
1297                                 count++;
1298                         }
1299                 }
1300         }
1301
1302         if (!count)
1303                 printf(" Error: symbol '%s' not present amongst the samples.\n", sym_hist_filter);
1304 }
1305
1306 static int __cmd_annotate(void)
1307 {
1308         int ret, rc = EXIT_FAILURE;
1309         unsigned long offset = 0;
1310         unsigned long head = 0;
1311         struct stat stat;
1312         event_t *event;
1313         uint32_t size;
1314         char *buf;
1315
1316         register_idle_thread();
1317
1318         input = open(input_name, O_RDONLY);
1319         if (input < 0) {
1320                 perror("failed to open file");
1321                 exit(-1);
1322         }
1323
1324         ret = fstat(input, &stat);
1325         if (ret < 0) {
1326                 perror("failed to stat file");
1327                 exit(-1);
1328         }
1329
1330         if (!stat.st_size) {
1331                 fprintf(stderr, "zero-sized file, nothing to do!\n");
1332                 exit(0);
1333         }
1334
1335         if (load_kernel() < 0) {
1336                 perror("failed to load kernel symbols");
1337                 return EXIT_FAILURE;
1338         }
1339
1340 remap:
1341         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1342                            MAP_SHARED, input, offset);
1343         if (buf == MAP_FAILED) {
1344                 perror("failed to mmap file");
1345                 exit(-1);
1346         }
1347
1348 more:
1349         event = (event_t *)(buf + head);
1350
1351         size = event->header.size;
1352         if (!size)
1353                 size = 8;
1354
1355         if (head + event->header.size >= page_size * mmap_window) {
1356                 unsigned long shift = page_size * (head / page_size);
1357                 int ret;
1358
1359                 ret = munmap(buf, page_size * mmap_window);
1360                 assert(ret == 0);
1361
1362                 offset += shift;
1363                 head -= shift;
1364                 goto remap;
1365         }
1366
1367         size = event->header.size;
1368
1369         dprintf("%p [%p]: event: %d\n",
1370                         (void *)(offset + head),
1371                         (void *)(long)event->header.size,
1372                         event->header.type);
1373
1374         if (!size || process_event(event, offset, head) < 0) {
1375
1376                 dprintf("%p [%p]: skipping unknown header type: %d\n",
1377                         (void *)(offset + head),
1378                         (void *)(long)(event->header.size),
1379                         event->header.type);
1380
1381                 total_unknown++;
1382
1383                 /*
1384                  * assume we lost track of the stream, check alignment, and
1385                  * increment a single u64 in the hope to catch on again 'soon'.
1386                  */
1387
1388                 if (unlikely(head & 7))
1389                         head &= ~7ULL;
1390
1391                 size = 8;
1392         }
1393
1394         head += size;
1395
1396         if (offset + head < (unsigned long)stat.st_size)
1397                 goto more;
1398
1399         rc = EXIT_SUCCESS;
1400         close(input);
1401
1402         dprintf("      IP events: %10ld\n", total);
1403         dprintf("    mmap events: %10ld\n", total_mmap);
1404         dprintf("    comm events: %10ld\n", total_comm);
1405         dprintf("    fork events: %10ld\n", total_fork);
1406         dprintf(" unknown events: %10ld\n", total_unknown);
1407
1408         if (dump_trace)
1409                 return 0;
1410
1411         if (verbose >= 3)
1412                 threads__fprintf(stdout);
1413
1414         if (verbose >= 2)
1415                 dsos__fprintf(stdout);
1416
1417         collapse__resort();
1418         output__resort();
1419
1420         find_annotations();
1421
1422         return rc;
1423 }
1424
1425 static const char * const annotate_usage[] = {
1426         "perf annotate [<options>] <command>",
1427         NULL
1428 };
1429
1430 static const struct option options[] = {
1431         OPT_STRING('i', "input", &input_name, "file",
1432                     "input file name"),
1433         OPT_STRING('s', "symbol", &sym_hist_filter, "symbol",
1434                     "symbol to annotate"),
1435         OPT_BOOLEAN('v', "verbose", &verbose,
1436                     "be more verbose (show symbol address, etc)"),
1437         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1438                     "dump raw trace in ASCII"),
1439         OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
1440         OPT_BOOLEAN('m', "modules", &modules,
1441                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
1442         OPT_BOOLEAN('l', "print-line", &print_line,
1443                     "print matching source lines (may be slow)"),
1444         OPT_BOOLEAN('P', "full-paths", &full_paths,
1445                     "Don't shorten the displayed pathnames"),
1446         OPT_END()
1447 };
1448
1449 static void setup_sorting(void)
1450 {
1451         char *tmp, *tok, *str = strdup(sort_order);
1452
1453         for (tok = strtok_r(str, ", ", &tmp);
1454                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1455                 if (sort_dimension__add(tok) < 0) {
1456                         error("Unknown --sort key: `%s'", tok);
1457                         usage_with_options(annotate_usage, options);
1458                 }
1459         }
1460
1461         free(str);
1462 }
1463
1464 int cmd_annotate(int argc, const char **argv, const char *prefix __used)
1465 {
1466         symbol__init();
1467
1468         page_size = getpagesize();
1469
1470         argc = parse_options(argc, argv, options, annotate_usage, 0);
1471
1472         setup_sorting();
1473
1474         if (argc) {
1475                 /*
1476                  * Special case: if there's an argument left then assume tha
1477                  * it's a symbol filter:
1478                  */
1479                 if (argc > 1)
1480                         usage_with_options(annotate_usage, options);
1481
1482                 sym_hist_filter = argv[0];
1483         }
1484
1485         if (!sym_hist_filter)
1486                 usage_with_options(annotate_usage, options);
1487
1488         setup_pager();
1489
1490         return __cmd_annotate();
1491 }