git.oblomov.eu Git - 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 "util/list.h"
  14 #include "util/cache.h"
  15 #include "util/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 = NULL;
  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 unsigned long    page_size;
  43 static unsigned long    mmap_window = 32;
  44
  45 struct ip_event {
  46         struct perf_event_header header;
  47         __u64 ip;
  48         __u32 pid, tid;
  49 };
  50
  51 struct mmap_event {
  52         struct perf_event_header header;
  53         __u32 pid, tid;
  54         __u64 start;
  55         __u64 len;
  56         __u64 pgoff;
  57         char filename[PATH_MAX];
  58 };
  59
  60 struct comm_event {
  61         struct perf_event_header header;
  62         __u32 pid, tid;
  63         char comm[16];
  64 };
  65
  66 struct fork_event {
  67         struct perf_event_header header;
  68         __u32 pid, ppid;
  69 };
  70
  71 struct period_event {
  72         struct perf_event_header header;
  73         __u64 time;
  74         __u64 id;
  75         __u64 sample_period;
  76 };
  77
  78 typedef union event_union {
  79         struct perf_event_header        header;
  80         struct ip_event                 ip;
  81         struct mmap_event               mmap;
  82         struct comm_event               comm;
  83         struct fork_event               fork;
  84         struct period_event             period;
  85 } event_t;
  86
  87 static LIST_HEAD(dsos);
  88 static struct dso *kernel_dso;
  89 static struct dso *vdso;
  90
  91
  92 static void dsos__add(struct dso *dso)
  93 {
  94         list_add_tail(&dso->node, &dsos);
  95 }
  96
  97 static struct dso *dsos__find(const char *name)
  98 {
  99         struct dso *pos;
 100
 101         list_for_each_entry(pos, &dsos, node)
 102                 if (strcmp(pos->name, name) == 0)
 103                         return pos;
 104         return NULL;
 105 }
 106
 107 static struct dso *dsos__findnew(const char *name)
 108 {
 109         struct dso *dso = dsos__find(name);
 110         int nr;
 111
 112         if (dso)
 113                 return dso;
 114
 115         dso = dso__new(name, 0);
 116         if (!dso)
 117                 goto out_delete_dso;
 118
 119         nr = dso__load(dso, NULL, verbose);
 120         if (nr < 0) {
 121                 if (verbose)
 122                         fprintf(stderr, "Failed to open: %s\n", name);
 123                 goto out_delete_dso;
 124         }
 125         if (!nr && verbose) {
 126                 fprintf(stderr,
 127                 "No symbols found in: %s, maybe install a debug package?\n",
 128                                 name);
 129         }
 130
 131         dsos__add(dso);
 132
 133         return dso;
 134
 135 out_delete_dso:
 136         dso__delete(dso);
 137         return NULL;
 138 }
 139
 140 static void dsos__fprintf(FILE *fp)
 141 {
 142         struct dso *pos;
 143
 144         list_for_each_entry(pos, &dsos, node)
 145                 dso__fprintf(pos, fp);
 146 }
 147
 148 static struct symbol *vdso__find_symbol(struct dso *dso, uint64_t ip)
 149 {
 150         return dso__find_symbol(kernel_dso, ip);
 151 }
 152
 153 static int load_kernel(void)
 154 {
 155         int err;
 156
 157         kernel_dso = dso__new("[kernel]", 0);
 158         if (!kernel_dso)
 159                 return -1;
 160
 161         err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose);
 162         if (err) {
 163                 dso__delete(kernel_dso);
 164                 kernel_dso = NULL;
 165         } else
 166                 dsos__add(kernel_dso);
 167
 168         vdso = dso__new("[vdso]", 0);
 169         if (!vdso)
 170                 return -1;
 171
 172         vdso->find_symbol = vdso__find_symbol;
 173
 174         dsos__add(vdso);
 175
 176         return err;
 177 }
 178
 179 struct map {
 180         struct list_head node;
 181         uint64_t         start;
 182         uint64_t         end;
 183         uint64_t         pgoff;
 184         uint64_t         (*map_ip)(struct map *, uint64_t);
 185         struct dso       *dso;
 186 };
 187
 188 static uint64_t map__map_ip(struct map *map, uint64_t ip)
 189 {
 190         return ip - map->start + map->pgoff;
 191 }
 192
 193 static uint64_t vdso__map_ip(struct map *map, uint64_t ip)
 194 {
 195         return ip;
 196 }
 197
 198 static struct map *map__new(struct mmap_event *event)
 199 {
 200         struct map *self = malloc(sizeof(*self));
 201
 202         if (self != NULL) {
 203                 const char *filename = event->filename;
 204
 205                 self->start = event->start;
 206                 self->end   = event->start + event->len;
 207                 self->pgoff = event->pgoff;
 208
 209                 self->dso = dsos__findnew(filename);
 210                 if (self->dso == NULL)
 211                         goto out_delete;
 212
 213                 if (self->dso == vdso)
 214                         self->map_ip = vdso__map_ip;
 215                 else
 216                         self->map_ip = map__map_ip;
 217         }
 218         return self;
 219 out_delete:
 220         free(self);
 221         return NULL;
 222 }
 223
 224 static struct map *map__clone(struct map *self)
 225 {
 226         struct map *map = malloc(sizeof(*self));
 227
 228         if (!map)
 229                 return NULL;
 230
 231         memcpy(map, self, sizeof(*self));
 232
 233         return map;
 234 }
 235
 236 static int map__overlap(struct map *l, struct map *r)
 237 {
 238         if (l->start > r->start) {
 239                 struct map *t = l;
 240                 l = r;
 241                 r = t;
 242         }
 243
 244         if (l->end > r->start)
 245                 return 1;
 246
 247         return 0;
 248 }
 249
 250 static size_t map__fprintf(struct map *self, FILE *fp)
 251 {
 252         return fprintf(fp, " %"PRIx64"-%"PRIx64" %"PRIx64" %s\n",
 253                        self->start, self->end, self->pgoff, self->dso->name);
 254 }
 255
 256
 257 struct thread {
 258         struct rb_node   rb_node;
 259         struct list_head maps;
 260         pid_t            pid;
 261         char             *comm;
 262 };
 263
 264 static struct thread *thread__new(pid_t pid)
 265 {
 266         struct thread *self = malloc(sizeof(*self));
 267
 268         if (self != NULL) {
 269                 self->pid = pid;
 270                 self->comm = malloc(32);
 271                 if (self->comm)
 272                         snprintf(self->comm, 32, ":%d", self->pid);
 273                 INIT_LIST_HEAD(&self->maps);
 274         }
 275
 276         return self;
 277 }
 278
 279 static int thread__set_comm(struct thread *self, const char *comm)
 280 {
 281         if (self->comm)
 282                 free(self->comm);
 283         self->comm = strdup(comm);
 284         return self->comm ? 0 : -ENOMEM;
 285 }
 286
 287 static size_t thread__fprintf(struct thread *self, FILE *fp)
 288 {
 289         struct map *pos;
 290         size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
 291
 292         list_for_each_entry(pos, &self->maps, node)
 293                 ret += map__fprintf(pos, fp);
 294
 295         return ret;
 296 }
 297
 298
 299 static struct rb_root threads;
 300 static struct thread *last_match;
 301
 302 static struct thread *threads__findnew(pid_t pid)
 303 {
 304         struct rb_node **p = &threads.rb_node;
 305         struct rb_node *parent = NULL;
 306         struct thread *th;
 307
 308         /*
 309          * Font-end cache - PID lookups come in blocks,
 310          * so most of the time we dont have to look up
 311          * the full rbtree:
 312          */
 313         if (last_match && last_match->pid == pid)
 314                 return last_match;
 315
 316         while (*p != NULL) {
 317                 parent = *p;
 318                 th = rb_entry(parent, struct thread, rb_node);
 319
 320                 if (th->pid == pid) {
 321                         last_match = th;
 322                         return th;
 323                 }
 324
 325                 if (pid < th->pid)
 326                         p = &(*p)->rb_left;
 327                 else
 328                         p = &(*p)->rb_right;
 329         }
 330
 331         th = thread__new(pid);
 332         if (th != NULL) {
 333                 rb_link_node(&th->rb_node, parent, p);
 334                 rb_insert_color(&th->rb_node, &threads);
 335                 last_match = th;
 336         }
 337
 338         return th;
 339 }
 340
 341 static void thread__insert_map(struct thread *self, struct map *map)
 342 {
 343         struct map *pos, *tmp;
 344
 345         list_for_each_entry_safe(pos, tmp, &self->maps, node) {
 346                 if (map__overlap(pos, map)) {
 347                         list_del_init(&pos->node);
 348                         /* XXX leaks dsos */
 349                         free(pos);
 350                 }
 351         }
 352
 353         list_add_tail(&map->node, &self->maps);
 354 }
 355
 356 static int thread__fork(struct thread *self, struct thread *parent)
 357 {
 358         struct map *map;
 359
 360         if (self->comm)
 361                 free(self->comm);
 362         self->comm = strdup(parent->comm);
 363         if (!self->comm)
 364                 return -ENOMEM;
 365
 366         list_for_each_entry(map, &parent->maps, node) {
 367                 struct map *new = map__clone(map);
 368                 if (!new)
 369                         return -ENOMEM;
 370                 thread__insert_map(self, new);
 371         }
 372
 373         return 0;
 374 }
 375
 376 static struct map *thread__find_map(struct thread *self, uint64_t ip)
 377 {
 378         struct map *pos;
 379
 380         if (self == NULL)
 381                 return NULL;
 382
 383         list_for_each_entry(pos, &self->maps, node)
 384                 if (ip >= pos->start && ip <= pos->end)
 385                         return pos;
 386
 387         return NULL;
 388 }
 389
 390 static size_t threads__fprintf(FILE *fp)
 391 {
 392         size_t ret = 0;
 393         struct rb_node *nd;
 394
 395         for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
 396                 struct thread *pos = rb_entry(nd, struct thread, rb_node);
 397
 398                 ret += thread__fprintf(pos, fp);
 399         }
 400
 401         return ret;
 402 }
 403
 404 /*
 405  * histogram, sorted on item, collects counts
 406  */
 407
 408 static struct rb_root hist;
 409
 410 struct hist_entry {
 411         struct rb_node   rb_node;
 412
 413         struct thread    *thread;
 414         struct map       *map;
 415         struct dso       *dso;
 416         struct symbol    *sym;
 417         uint64_t         ip;
 418         char             level;
 419
 420         uint32_t         count;
 421 };
 422
 423 /*
 424  * configurable sorting bits
 425  */
 426
 427 struct sort_entry {
 428         struct list_head list;
 429
 430         char *header;
 431
 432         int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
 433         int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
 434         size_t  (*print)(FILE *fp, struct hist_entry *);
 435 };
 436
 437 /* --sort pid */
 438
 439 static int64_t
 440 sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
 441 {
 442         return right->thread->pid - left->thread->pid;
 443 }
 444
 445 static size_t
 446 sort__thread_print(FILE *fp, struct hist_entry *self)
 447 {
 448         return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
 449 }
 450
 451 static struct sort_entry sort_thread = {
 452         .header = "         Command:  Pid",
 453         .cmp    = sort__thread_cmp,
 454         .print  = sort__thread_print,
 455 };
 456
 457 /* --sort comm */
 458
 459 static int64_t
 460 sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
 461 {
 462         return right->thread->pid - left->thread->pid;
 463 }
 464
 465 static int64_t
 466 sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
 467 {
 468         char *comm_l = left->thread->comm;
 469         char *comm_r = right->thread->comm;
 470
 471         if (!comm_l || !comm_r) {
 472                 if (!comm_l && !comm_r)
 473                         return 0;
 474                 else if (!comm_l)
 475                         return -1;
 476                 else
 477                         return 1;
 478         }
 479
 480         return strcmp(comm_l, comm_r);
 481 }
 482
 483 static size_t
 484 sort__comm_print(FILE *fp, struct hist_entry *self)
 485 {
 486         return fprintf(fp, "%16s", self->thread->comm);
 487 }
 488
 489 static struct sort_entry sort_comm = {
 490         .header         = "         Command",
 491         .cmp            = sort__comm_cmp,
 492         .collapse       = sort__comm_collapse,
 493         .print          = sort__comm_print,
 494 };
 495
 496 /* --sort dso */
 497
 498 static int64_t
 499 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 500 {
 501         struct dso *dso_l = left->dso;
 502         struct dso *dso_r = right->dso;
 503
 504         if (!dso_l || !dso_r) {
 505                 if (!dso_l && !dso_r)
 506                         return 0;
 507                 else if (!dso_l)
 508                         return -1;
 509                 else
 510                         return 1;
 511         }
 512
 513         return strcmp(dso_l->name, dso_r->name);
 514 }
 515
 516 static size_t
 517 sort__dso_print(FILE *fp, struct hist_entry *self)
 518 {
 519         if (self->dso)
 520                 return fprintf(fp, "%-25s", self->dso->name);
 521
 522         return fprintf(fp, "%016llx         ", (__u64)self->ip);
 523 }
 524
 525 static struct sort_entry sort_dso = {
 526         .header = "Shared Object            ",
 527         .cmp    = sort__dso_cmp,
 528         .print  = sort__dso_print,
 529 };
 530
 531 /* --sort symbol */
 532
 533 static int64_t
 534 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 535 {
 536         uint64_t ip_l, ip_r;
 537
 538         if (left->sym == right->sym)
 539                 return 0;
 540
 541         ip_l = left->sym ? left->sym->start : left->ip;
 542         ip_r = right->sym ? right->sym->start : right->ip;
 543
 544         return (int64_t)(ip_r - ip_l);
 545 }
 546
 547 static size_t
 548 sort__sym_print(FILE *fp, struct hist_entry *self)
 549 {
 550         size_t ret = 0;
 551
 552         if (verbose)
 553                 ret += fprintf(fp, "%#018llx  ", (__u64)self->ip);
 554
 555         if (self->sym) {
 556                 ret += fprintf(fp, "[%c] %s",
 557                         self->dso == kernel_dso ? 'k' : '.', self->sym->name);
 558         } else {
 559                 ret += fprintf(fp, "%#016llx", (__u64)self->ip);
 560         }
 561
 562         return ret;
 563 }
 564
 565 static struct sort_entry sort_sym = {
 566         .header = "Symbol",
 567         .cmp    = sort__sym_cmp,
 568         .print  = sort__sym_print,
 569 };
 570
 571 static int sort__need_collapse = 0;
 572
 573 struct sort_dimension {
 574         char                    *name;
 575         struct sort_entry       *entry;
 576         int                     taken;
 577 };
 578
 579 static struct sort_dimension sort_dimensions[] = {
 580         { .name = "pid",        .entry = &sort_thread,  },
 581         { .name = "comm",       .entry = &sort_comm,    },
 582         { .name = "dso",        .entry = &sort_dso,     },
 583         { .name = "symbol",     .entry = &sort_sym,     },
 584 };
 585
 586 static LIST_HEAD(hist_entry__sort_list);
 587
 588 static int sort_dimension__add(char *tok)
 589 {
 590         int i;
 591
 592         for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
 593                 struct sort_dimension *sd = &sort_dimensions[i];
 594
 595                 if (sd->taken)
 596                         continue;
 597
 598                 if (strncasecmp(tok, sd->name, strlen(tok)))
 599                         continue;
 600
 601                 if (sd->entry->collapse)
 602                         sort__need_collapse = 1;
 603
 604                 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
 605                 sd->taken = 1;
 606
 607                 return 0;
 608         }
 609
 610         return -ESRCH;
 611 }
 612
 613 static int64_t
 614 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 615 {
 616         struct sort_entry *se;
 617         int64_t cmp = 0;
 618
 619         list_for_each_entry(se, &hist_entry__sort_list, list) {
 620                 cmp = se->cmp(left, right);
 621                 if (cmp)
 622                         break;
 623         }
 624
 625         return cmp;
 626 }
 627
 628 static int64_t
 629 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 630 {
 631         struct sort_entry *se;
 632         int64_t cmp = 0;
 633
 634         list_for_each_entry(se, &hist_entry__sort_list, list) {
 635                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 636
 637                 f = se->collapse ?: se->cmp;
 638
 639                 cmp = f(left, right);
 640                 if (cmp)
 641                         break;
 642         }
 643
 644         return cmp;
 645 }
 646
 647 /*
 648  * collect histogram counts
 649  */
 650 static void hist_hit(struct hist_entry *he, uint64_t ip)
 651 {
 652         unsigned int sym_size, offset;
 653         struct symbol *sym = he->sym;
 654
 655         he->count++;
 656
 657         if (!sym || !sym->hist)
 658                 return;
 659
 660         sym_size = sym->end - sym->start;
 661         offset = ip - sym->start;
 662
 663         if (offset >= sym_size)
 664                 return;
 665
 666         sym->hist_sum++;
 667         sym->hist[offset]++;
 668
 669         if (verbose >= 3)
 670                 printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
 671                         (void *)he->sym->start,
 672                         he->sym->name,
 673                         (void *)ip, ip - he->sym->start,
 674                         sym->hist[offset]);
 675 }
 676
 677 static int
 678 hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
 679                 struct symbol *sym, uint64_t ip, char level)
 680 {
 681         struct rb_node **p = &hist.rb_node;
 682         struct rb_node *parent = NULL;
 683         struct hist_entry *he;
 684         struct hist_entry entry = {
 685                 .thread = thread,
 686                 .map    = map,
 687                 .dso    = dso,
 688                 .sym    = sym,
 689                 .ip     = ip,
 690                 .level  = level,
 691                 .count  = 1,
 692         };
 693         int cmp;
 694
 695         while (*p != NULL) {
 696                 parent = *p;
 697                 he = rb_entry(parent, struct hist_entry, rb_node);
 698
 699                 cmp = hist_entry__cmp(&entry, he);
 700
 701                 if (!cmp) {
 702                         hist_hit(he, ip);
 703
 704                         return 0;
 705                 }
 706
 707                 if (cmp < 0)
 708                         p = &(*p)->rb_left;
 709                 else
 710                         p = &(*p)->rb_right;
 711         }
 712
 713         he = malloc(sizeof(*he));
 714         if (!he)
 715                 return -ENOMEM;
 716         *he = entry;
 717         rb_link_node(&he->rb_node, parent, p);
 718         rb_insert_color(&he->rb_node, &hist);
 719
 720         return 0;
 721 }
 722
 723 static void hist_entry__free(struct hist_entry *he)
 724 {
 725         free(he);
 726 }
 727
 728 /*
 729  * collapse the histogram
 730  */
 731
 732 static struct rb_root collapse_hists;
 733
 734 static void collapse__insert_entry(struct hist_entry *he)
 735 {
 736         struct rb_node **p = &collapse_hists.rb_node;
 737         struct rb_node *parent = NULL;
 738         struct hist_entry *iter;
 739         int64_t cmp;
 740
 741         while (*p != NULL) {
 742                 parent = *p;
 743                 iter = rb_entry(parent, struct hist_entry, rb_node);
 744
 745                 cmp = hist_entry__collapse(iter, he);
 746
 747                 if (!cmp) {
 748                         iter->count += he->count;
 749                         hist_entry__free(he);
 750                         return;
 751                 }
 752
 753                 if (cmp < 0)
 754                         p = &(*p)->rb_left;
 755                 else
 756                         p = &(*p)->rb_right;
 757         }
 758
 759         rb_link_node(&he->rb_node, parent, p);
 760         rb_insert_color(&he->rb_node, &collapse_hists);
 761 }
 762
 763 static void collapse__resort(void)
 764 {
 765         struct rb_node *next;
 766         struct hist_entry *n;
 767
 768         if (!sort__need_collapse)
 769                 return;
 770
 771         next = rb_first(&hist);
 772         while (next) {
 773                 n = rb_entry(next, struct hist_entry, rb_node);
 774                 next = rb_next(&n->rb_node);
 775
 776                 rb_erase(&n->rb_node, &hist);
 777                 collapse__insert_entry(n);
 778         }
 779 }
 780
 781 /*
 782  * reverse the map, sort on count.
 783  */
 784
 785 static struct rb_root output_hists;
 786
 787 static void output__insert_entry(struct hist_entry *he)
 788 {
 789         struct rb_node **p = &output_hists.rb_node;
 790         struct rb_node *parent = NULL;
 791         struct hist_entry *iter;
 792
 793         while (*p != NULL) {
 794                 parent = *p;
 795                 iter = rb_entry(parent, struct hist_entry, rb_node);
 796
 797                 if (he->count > iter->count)
 798                         p = &(*p)->rb_left;
 799                 else
 800                         p = &(*p)->rb_right;
 801         }
 802
 803         rb_link_node(&he->rb_node, parent, p);
 804         rb_insert_color(&he->rb_node, &output_hists);
 805 }
 806
 807 static void output__resort(void)
 808 {
 809         struct rb_node *next;
 810         struct hist_entry *n;
 811         struct rb_root *tree = &hist;
 812
 813         if (sort__need_collapse)
 814                 tree = &collapse_hists;
 815
 816         next = rb_first(tree);
 817
 818         while (next) {
 819                 n = rb_entry(next, struct hist_entry, rb_node);
 820                 next = rb_next(&n->rb_node);
 821
 822                 rb_erase(&n->rb_node, tree);
 823                 output__insert_entry(n);
 824         }
 825 }
 826
 827 static void register_idle_thread(void)
 828 {
 829         struct thread *thread = threads__findnew(0);
 830
 831         if (thread == NULL ||
 832                         thread__set_comm(thread, "[idle]")) {
 833                 fprintf(stderr, "problem inserting idle task.\n");
 834                 exit(-1);
 835         }
 836 }
 837
 838 static unsigned long total = 0,
 839                      total_mmap = 0,
 840                      total_comm = 0,
 841                      total_fork = 0,
 842                      total_unknown = 0;
 843
 844 static int
 845 process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
 846 {
 847         char level;
 848         int show = 0;
 849         struct dso *dso = NULL;
 850         struct thread *thread = threads__findnew(event->ip.pid);
 851         uint64_t ip = event->ip.ip;
 852         struct map *map = NULL;
 853
 854         dprintf("%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
 855                 (void *)(offset + head),
 856                 (void *)(long)(event->header.size),
 857                 event->header.misc,
 858                 event->ip.pid,
 859                 (void *)(long)ip);
 860
 861         dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 862
 863         if (thread == NULL) {
 864                 fprintf(stderr, "problem processing %d event, skipping it.\n",
 865                         event->header.type);
 866                 return -1;
 867         }
 868
 869         if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
 870                 show = SHOW_KERNEL;
 871                 level = 'k';
 872
 873                 dso = kernel_dso;
 874
 875                 dprintf(" ...... dso: %s\n", dso->name);
 876
 877         } else if (event->header.misc & PERF_EVENT_MISC_USER) {
 878
 879                 show = SHOW_USER;
 880                 level = '.';
 881
 882                 map = thread__find_map(thread, ip);
 883                 if (map != NULL) {
 884                         ip = map->map_ip(map, ip);
 885                         dso = map->dso;
 886                 } else {
 887                         /*
 888                          * If this is outside of all known maps,
 889                          * and is a negative address, try to look it
 890                          * up in the kernel dso, as it might be a
 891                          * vsyscall (which executes in user-mode):
 892                          */
 893                         if ((long long)ip < 0)
 894                                 dso = kernel_dso;
 895                 }
 896                 dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
 897
 898         } else {
 899                 show = SHOW_HV;
 900                 level = 'H';
 901                 dprintf(" ...... dso: [hypervisor]\n");
 902         }
 903
 904         if (show & show_mask) {
 905                 struct symbol *sym = NULL;
 906
 907                 if (dso)
 908                         sym = dso->find_symbol(dso, ip);
 909
 910                 if (hist_entry__add(thread, map, dso, sym, ip, level)) {
 911                         fprintf(stderr,
 912                 "problem incrementing symbol count, skipping event\n");
 913                         return -1;
 914                 }
 915         }
 916         total++;
 917
 918         return 0;
 919 }
 920
 921 static int
 922 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
 923 {
 924         struct thread *thread = threads__findnew(event->mmap.pid);
 925         struct map *map = map__new(&event->mmap);
 926
 927         dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
 928                 (void *)(offset + head),
 929                 (void *)(long)(event->header.size),
 930                 event->mmap.pid,
 931                 (void *)(long)event->mmap.start,
 932                 (void *)(long)event->mmap.len,
 933                 (void *)(long)event->mmap.pgoff,
 934                 event->mmap.filename);
 935
 936         if (thread == NULL || map == NULL) {
 937                 dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
 938                 return 0;
 939         }
 940
 941         thread__insert_map(thread, map);
 942         total_mmap++;
 943
 944         return 0;
 945 }
 946
 947 static int
 948 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
 949 {
 950         struct thread *thread = threads__findnew(event->comm.pid);
 951
 952         dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
 953                 (void *)(offset + head),
 954                 (void *)(long)(event->header.size),
 955                 event->comm.comm, event->comm.pid);
 956
 957         if (thread == NULL ||
 958             thread__set_comm(thread, event->comm.comm)) {
 959                 dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
 960                 return -1;
 961         }
 962         total_comm++;
 963
 964         return 0;
 965 }
 966
 967 static int
 968 process_fork_event(event_t *event, unsigned long offset, unsigned long head)
 969 {
 970         struct thread *thread = threads__findnew(event->fork.pid);
 971         struct thread *parent = threads__findnew(event->fork.ppid);
 972
 973         dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
 974                 (void *)(offset + head),
 975                 (void *)(long)(event->header.size),
 976                 event->fork.pid, event->fork.ppid);
 977
 978         if (!thread || !parent || thread__fork(thread, parent)) {
 979                 dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
 980                 return -1;
 981         }
 982         total_fork++;
 983
 984         return 0;
 985 }
 986
 987 static int
 988 process_period_event(event_t *event, unsigned long offset, unsigned long head)
 989 {
 990         dprintf("%p [%p]: PERF_EVENT_PERIOD: time:%Ld, id:%Ld: period:%Ld\n",
 991                 (void *)(offset + head),
 992                 (void *)(long)(event->header.size),
 993                 event->period.time,
 994                 event->period.id,
 995                 event->period.sample_period);
 996
 997         return 0;
 998 }
 999
1000 static int
1001 process_event(event_t *event, unsigned long offset, unsigned long head)
1002 {
1003         if (event->header.misc & PERF_EVENT_MISC_OVERFLOW)
1004                 return process_overflow_event(event, offset, head);
1005
1006         switch (event->header.type) {
1007         case PERF_EVENT_MMAP:
1008                 return process_mmap_event(event, offset, head);
1009
1010         case PERF_EVENT_COMM:
1011                 return process_comm_event(event, offset, head);
1012
1013         case PERF_EVENT_FORK:
1014                 return process_fork_event(event, offset, head);
1015
1016         case PERF_EVENT_PERIOD:
1017                 return process_period_event(event, offset, head);
1018         /*
1019          * We dont process them right now but they are fine:
1020          */
1021
1022         case PERF_EVENT_THROTTLE:
1023         case PERF_EVENT_UNTHROTTLE:
1024                 return 0;
1025
1026         default:
1027                 return -1;
1028         }
1029
1030         return 0;
1031 }
1032
1033 static int
1034 parse_line(FILE *file, struct symbol *sym, uint64_t start, uint64_t len)
1035 {
1036         char *line = NULL, *tmp, *tmp2;
1037         unsigned int offset;
1038         size_t line_len;
1039         __u64 line_ip;
1040         int ret;
1041         char *c;
1042
1043         if (getline(&line, &line_len, file) < 0)
1044                 return -1;
1045         if (!line)
1046                 return -1;
1047
1048         c = strchr(line, '\n');
1049         if (c)
1050                 *c = 0;
1051
1052         line_ip = -1;
1053         offset = 0;
1054         ret = -2;
1055
1056         /*
1057          * Strip leading spaces:
1058          */
1059         tmp = line;
1060         while (*tmp) {
1061                 if (*tmp != ' ')
1062                         break;
1063                 tmp++;
1064         }
1065
1066         if (*tmp) {
1067                 /*
1068                  * Parse hexa addresses followed by ':'
1069                  */
1070                 line_ip = strtoull(tmp, &tmp2, 16);
1071                 if (*tmp2 != ':')
1072                         line_ip = -1;
1073         }
1074
1075         if (line_ip != -1) {
1076                 unsigned int hits = 0;
1077                 double percent = 0.0;
1078                 char *color = PERF_COLOR_NORMAL;
1079
1080                 offset = line_ip - start;
1081                 if (offset < len)
1082                         hits = sym->hist[offset];
1083
1084                 if (sym->hist_sum)
1085                         percent = 100.0 * hits / sym->hist_sum;
1086
1087                 /*
1088                  * We color high-overhead entries in red, low-overhead
1089                  * entries in green - and keep the middle ground normal:
1090                  */
1091                 if (percent >= 5.0)
1092                         color = PERF_COLOR_RED;
1093                 else {
1094                         if (percent > 0.5)
1095                                 color = PERF_COLOR_GREEN;
1096                 }
1097
1098                 color_fprintf(stdout, color, " %7.2f", percent);
1099                 printf(" :      ");
1100                 color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", line);
1101         } else {
1102                 if (!*line)
1103                         printf("         :\n");
1104                 else
1105                         printf("         :      %s\n", line);
1106         }
1107
1108         return 0;
1109 }
1110
1111 static void annotate_sym(struct dso *dso, struct symbol *sym)
1112 {
1113         char *filename = dso->name;
1114         uint64_t start, end, len;
1115         char command[PATH_MAX*2];
1116         FILE *file;
1117
1118         if (!filename)
1119                 return;
1120         if (dso == kernel_dso)
1121                 filename = vmlinux;
1122
1123         printf("\n------------------------------------------------\n");
1124         printf(" Percent |      Source code & Disassembly of %s\n", filename);
1125         printf("------------------------------------------------\n");
1126
1127         if (verbose >= 2)
1128                 printf("annotating [%p] %30s : [%p] %30s\n", dso, dso->name, sym, sym->name);
1129
1130         start = sym->obj_start;
1131         if (!start)
1132                 start = sym->start;
1133
1134         end = start + sym->end - sym->start + 1;
1135         len = sym->end - sym->start;
1136
1137         sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", (__u64)start, (__u64)end, filename);
1138
1139         if (verbose >= 3)
1140                 printf("doing: %s\n", command);
1141
1142         file = popen(command, "r");
1143         if (!file)
1144                 return;
1145
1146         while (!feof(file)) {
1147                 if (parse_line(file, sym, start, len) < 0)
1148                         break;
1149         }
1150
1151         pclose(file);
1152 }
1153
1154 static void find_annotations(void)
1155 {
1156         struct rb_node *nd;
1157         struct dso *dso;
1158         int count = 0;
1159
1160         list_for_each_entry(dso, &dsos, node) {
1161
1162                 for (nd = rb_first(&dso->syms); nd; nd = rb_next(nd)) {
1163                         struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
1164
1165                         if (sym->hist) {
1166                                 annotate_sym(dso, sym);
1167                                 count++;
1168                         }
1169                 }
1170         }
1171
1172         if (!count)
1173                 printf(" Error: symbol '%s' not present amongst the samples.\n", sym_hist_filter);
1174 }
1175
1176 static int __cmd_annotate(void)
1177 {
1178         int ret, rc = EXIT_FAILURE;
1179         unsigned long offset = 0;
1180         unsigned long head = 0;
1181         struct stat stat;
1182         event_t *event;
1183         uint32_t size;
1184         char *buf;
1185
1186         register_idle_thread();
1187
1188         input = open(input_name, O_RDONLY);
1189         if (input < 0) {
1190                 perror("failed to open file");
1191                 exit(-1);
1192         }
1193
1194         ret = fstat(input, &stat);
1195         if (ret < 0) {
1196                 perror("failed to stat file");
1197                 exit(-1);
1198         }
1199
1200         if (!stat.st_size) {
1201                 fprintf(stderr, "zero-sized file, nothing to do!\n");
1202                 exit(0);
1203         }
1204
1205         if (load_kernel() < 0) {
1206                 perror("failed to load kernel symbols");
1207                 return EXIT_FAILURE;
1208         }
1209
1210 remap:
1211         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1212                            MAP_SHARED, input, offset);
1213         if (buf == MAP_FAILED) {
1214                 perror("failed to mmap file");
1215                 exit(-1);
1216         }
1217
1218 more:
1219         event = (event_t *)(buf + head);
1220
1221         size = event->header.size;
1222         if (!size)
1223                 size = 8;
1224
1225         if (head + event->header.size >= page_size * mmap_window) {
1226                 unsigned long shift = page_size * (head / page_size);
1227                 int ret;
1228
1229                 ret = munmap(buf, page_size * mmap_window);
1230                 assert(ret == 0);
1231
1232                 offset += shift;
1233                 head -= shift;
1234                 goto remap;
1235         }
1236
1237         size = event->header.size;
1238
1239         dprintf("%p [%p]: event: %d\n",
1240                         (void *)(offset + head),
1241                         (void *)(long)event->header.size,
1242                         event->header.type);
1243
1244         if (!size || process_event(event, offset, head) < 0) {
1245
1246                 dprintf("%p [%p]: skipping unknown header type: %d\n",
1247                         (void *)(offset + head),
1248                         (void *)(long)(event->header.size),
1249                         event->header.type);
1250
1251                 total_unknown++;
1252
1253                 /*
1254                  * assume we lost track of the stream, check alignment, and
1255                  * increment a single u64 in the hope to catch on again 'soon'.
1256                  */
1257
1258                 if (unlikely(head & 7))
1259                         head &= ~7ULL;
1260
1261                 size = 8;
1262         }
1263
1264         head += size;
1265
1266         if (offset + head < stat.st_size)
1267                 goto more;
1268
1269         rc = EXIT_SUCCESS;
1270         close(input);
1271
1272         dprintf("      IP events: %10ld\n", total);
1273         dprintf("    mmap events: %10ld\n", total_mmap);
1274         dprintf("    comm events: %10ld\n", total_comm);
1275         dprintf("    fork events: %10ld\n", total_fork);
1276         dprintf(" unknown events: %10ld\n", total_unknown);
1277
1278         if (dump_trace)
1279                 return 0;
1280
1281         if (verbose >= 3)
1282                 threads__fprintf(stdout);
1283
1284         if (verbose >= 2)
1285                 dsos__fprintf(stdout);
1286
1287         collapse__resort();
1288         output__resort();
1289
1290         find_annotations();
1291
1292         return rc;
1293 }
1294
1295 static const char * const annotate_usage[] = {
1296         "perf annotate [<options>] <command>",
1297         NULL
1298 };
1299
1300 static const struct option options[] = {
1301         OPT_STRING('i', "input", &input_name, "file",
1302                     "input file name"),
1303         OPT_STRING('s', "symbol", &sym_hist_filter, "file",
1304                     "symbol to annotate"),
1305         OPT_BOOLEAN('v', "verbose", &verbose,
1306                     "be more verbose (show symbol address, etc)"),
1307         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1308                     "dump raw trace in ASCII"),
1309         OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
1310         OPT_END()
1311 };
1312
1313 static void setup_sorting(void)
1314 {
1315         char *tmp, *tok, *str = strdup(sort_order);
1316
1317         for (tok = strtok_r(str, ", ", &tmp);
1318                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
1319                 if (sort_dimension__add(tok) < 0) {
1320                         error("Unknown --sort key: `%s'", tok);
1321                         usage_with_options(annotate_usage, options);
1322                 }
1323         }
1324
1325         free(str);
1326 }
1327
1328 int cmd_annotate(int argc, const char **argv, const char *prefix)
1329 {
1330         symbol__init();
1331
1332         page_size = getpagesize();
1333
1334         argc = parse_options(argc, argv, options, annotate_usage, 0);
1335
1336         setup_sorting();
1337
1338         if (argc) {
1339                 /*
1340                  * Special case: if there's an argument left then assume tha
1341                  * it's a symbol filter:
1342                  */
1343                 if (argc > 1)
1344                         usage_with_options(annotate_usage, options);
1345
1346                 sym_hist_filter = argv[0];
1347         }
1348
1349         if (!sym_hist_filter)
1350                 usage_with_options(annotate_usage, options);
1351
1352         setup_pager();
1353
1354         return __cmd_annotate();
1355 }