git.oblomov.eu Git - linux-2.6/blob - tools/perf/builtin-report.c

   1 /*
   2  * builtin-report.c
   3  *
   4  * Builtin report 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 #include "util/callchain.h"
  19 #include "util/strlist.h"
  20
  21 #include "perf.h"
  22 #include "util/header.h"
  23
  24 #include "util/parse-options.h"
  25 #include "util/parse-events.h"
  26
  27 #define SHOW_KERNEL     1
  28 #define SHOW_USER       2
  29 #define SHOW_HV         4
  30
  31 static char             const *input_name = "perf.data";
  32 static char             *vmlinux = NULL;
  33
  34 static char             default_sort_order[] = "comm,dso,symbol";
  35 static char             *sort_order = default_sort_order;
  36 static char             *dso_list_str, *comm_list_str, *sym_list_str,
  37                         *col_width_list_str;
  38 static struct strlist   *dso_list, *comm_list, *sym_list;
  39 static char             *field_sep;
  40
  41 static int              input;
  42 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
  43
  44 static int              dump_trace = 0;
  45 #define dprintf(x...)   do { if (dump_trace) printf(x); } while (0)
  46 #define cdprintf(x...)  do { if (dump_trace) color_fprintf(stdout, color, x); } while (0)
  47
  48 static int              verbose;
  49 #define eprintf(x...)   do { if (verbose) fprintf(stderr, x); } while (0)
  50
  51 static int              modules;
  52
  53 static int              full_paths;
  54 static int              show_nr_samples;
  55
  56 static unsigned long    page_size;
  57 static unsigned long    mmap_window = 32;
  58
  59 static char             default_parent_pattern[] = "^sys_|^do_page_fault";
  60 static char             *parent_pattern = default_parent_pattern;
  61 static regex_t          parent_regex;
  62
  63 static int              exclude_other = 1;
  64
  65 static char             callchain_default_opt[] = "fractal,0.5";
  66
  67 static int              callchain;
  68
  69 static
  70 struct callchain_param  callchain_param = {
  71         .mode   = CHAIN_GRAPH_ABS,
  72         .min_percent = 0.5
  73 };
  74
  75 static u64              sample_type;
  76
  77 struct ip_event {
  78         struct perf_event_header header;
  79         u64 ip;
  80         u32 pid, tid;
  81         unsigned char __more_data[];
  82 };
  83
  84 struct mmap_event {
  85         struct perf_event_header header;
  86         u32 pid, tid;
  87         u64 start;
  88         u64 len;
  89         u64 pgoff;
  90         char filename[PATH_MAX];
  91 };
  92
  93 struct comm_event {
  94         struct perf_event_header header;
  95         u32 pid, tid;
  96         char comm[16];
  97 };
  98
  99 struct fork_event {
 100         struct perf_event_header header;
 101         u32 pid, ppid;
 102         u32 tid, ptid;
 103 };
 104
 105 struct lost_event {
 106         struct perf_event_header header;
 107         u64 id;
 108         u64 lost;
 109 };
 110
 111 struct read_event {
 112         struct perf_event_header header;
 113         u32 pid,tid;
 114         u64 value;
 115         u64 time_enabled;
 116         u64 time_running;
 117         u64 id;
 118 };
 119
 120 typedef union event_union {
 121         struct perf_event_header        header;
 122         struct ip_event                 ip;
 123         struct mmap_event               mmap;
 124         struct comm_event               comm;
 125         struct fork_event               fork;
 126         struct lost_event               lost;
 127         struct read_event               read;
 128 } event_t;
 129
 130 static int repsep_fprintf(FILE *fp, const char *fmt, ...)
 131 {
 132         int n;
 133         va_list ap;
 134
 135         va_start(ap, fmt);
 136         if (!field_sep)
 137                 n = vfprintf(fp, fmt, ap);
 138         else {
 139                 char *bf = NULL;
 140                 n = vasprintf(&bf, fmt, ap);
 141                 if (n > 0) {
 142                         char *sep = bf;
 143                         while (1) {
 144                                 sep = strchr(sep, *field_sep);
 145                                 if (sep == NULL)
 146                                         break;
 147                                 *sep = '.';
 148                         }
 149                 }
 150                 fputs(bf, fp);
 151                 free(bf);
 152         }
 153         va_end(ap);
 154         return n;
 155 }
 156
 157 static LIST_HEAD(dsos);
 158 static struct dso *kernel_dso;
 159 static struct dso *vdso;
 160 static struct dso *hypervisor_dso;
 161
 162 static void dsos__add(struct dso *dso)
 163 {
 164         list_add_tail(&dso->node, &dsos);
 165 }
 166
 167 static struct dso *dsos__find(const char *name)
 168 {
 169         struct dso *pos;
 170
 171         list_for_each_entry(pos, &dsos, node)
 172                 if (strcmp(pos->name, name) == 0)
 173                         return pos;
 174         return NULL;
 175 }
 176
 177 static struct dso *dsos__findnew(const char *name)
 178 {
 179         struct dso *dso = dsos__find(name);
 180         int nr;
 181
 182         if (dso)
 183                 return dso;
 184
 185         dso = dso__new(name, 0);
 186         if (!dso)
 187                 goto out_delete_dso;
 188
 189         nr = dso__load(dso, NULL, verbose);
 190         if (nr < 0) {
 191                 eprintf("Failed to open: %s\n", name);
 192                 goto out_delete_dso;
 193         }
 194         if (!nr)
 195                 eprintf("No symbols found in: %s, maybe install a debug package?\n", name);
 196
 197         dsos__add(dso);
 198
 199         return dso;
 200
 201 out_delete_dso:
 202         dso__delete(dso);
 203         return NULL;
 204 }
 205
 206 static void dsos__fprintf(FILE *fp)
 207 {
 208         struct dso *pos;
 209
 210         list_for_each_entry(pos, &dsos, node)
 211                 dso__fprintf(pos, fp);
 212 }
 213
 214 static struct symbol *vdso__find_symbol(struct dso *dso, u64 ip)
 215 {
 216         return dso__find_symbol(dso, ip);
 217 }
 218
 219 static int load_kernel(void)
 220 {
 221         int err;
 222
 223         kernel_dso = dso__new("[kernel]", 0);
 224         if (!kernel_dso)
 225                 return -1;
 226
 227         err = dso__load_kernel(kernel_dso, vmlinux, NULL, verbose, modules);
 228         if (err <= 0) {
 229                 dso__delete(kernel_dso);
 230                 kernel_dso = NULL;
 231         } else
 232                 dsos__add(kernel_dso);
 233
 234         vdso = dso__new("[vdso]", 0);
 235         if (!vdso)
 236                 return -1;
 237
 238         vdso->find_symbol = vdso__find_symbol;
 239
 240         dsos__add(vdso);
 241
 242         hypervisor_dso = dso__new("[hypervisor]", 0);
 243         if (!hypervisor_dso)
 244                 return -1;
 245         dsos__add(hypervisor_dso);
 246
 247         return err;
 248 }
 249
 250 static char __cwd[PATH_MAX];
 251 static char *cwd = __cwd;
 252 static int cwdlen;
 253
 254 static int strcommon(const char *pathname)
 255 {
 256         int n = 0;
 257
 258         while (n < cwdlen && pathname[n] == cwd[n])
 259                 ++n;
 260
 261         return n;
 262 }
 263
 264 struct map {
 265         struct list_head node;
 266         u64      start;
 267         u64      end;
 268         u64      pgoff;
 269         u64      (*map_ip)(struct map *, u64);
 270         struct dso       *dso;
 271 };
 272
 273 static u64 map__map_ip(struct map *map, u64 ip)
 274 {
 275         return ip - map->start + map->pgoff;
 276 }
 277
 278 static u64 vdso__map_ip(struct map *map __used, u64 ip)
 279 {
 280         return ip;
 281 }
 282
 283 static inline int is_anon_memory(const char *filename)
 284 {
 285         return strcmp(filename, "//anon") == 0;
 286 }
 287
 288 static struct map *map__new(struct mmap_event *event)
 289 {
 290         struct map *self = malloc(sizeof(*self));
 291
 292         if (self != NULL) {
 293                 const char *filename = event->filename;
 294                 char newfilename[PATH_MAX];
 295                 int anon;
 296
 297                 if (cwd) {
 298                         int n = strcommon(filename);
 299
 300                         if (n == cwdlen) {
 301                                 snprintf(newfilename, sizeof(newfilename),
 302                                          ".%s", filename + n);
 303                                 filename = newfilename;
 304                         }
 305                 }
 306
 307                 anon = is_anon_memory(filename);
 308
 309                 if (anon) {
 310                         snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", event->pid);
 311                         filename = newfilename;
 312                 }
 313
 314                 self->start = event->start;
 315                 self->end   = event->start + event->len;
 316                 self->pgoff = event->pgoff;
 317
 318                 self->dso = dsos__findnew(filename);
 319                 if (self->dso == NULL)
 320                         goto out_delete;
 321
 322                 if (self->dso == vdso || anon)
 323                         self->map_ip = vdso__map_ip;
 324                 else
 325                         self->map_ip = map__map_ip;
 326         }
 327         return self;
 328 out_delete:
 329         free(self);
 330         return NULL;
 331 }
 332
 333 static struct map *map__clone(struct map *self)
 334 {
 335         struct map *map = malloc(sizeof(*self));
 336
 337         if (!map)
 338                 return NULL;
 339
 340         memcpy(map, self, sizeof(*self));
 341
 342         return map;
 343 }
 344
 345 static int map__overlap(struct map *l, struct map *r)
 346 {
 347         if (l->start > r->start) {
 348                 struct map *t = l;
 349                 l = r;
 350                 r = t;
 351         }
 352
 353         if (l->end > r->start)
 354                 return 1;
 355
 356         return 0;
 357 }
 358
 359 static size_t map__fprintf(struct map *self, FILE *fp)
 360 {
 361         return fprintf(fp, " %Lx-%Lx %Lx %s\n",
 362                        self->start, self->end, self->pgoff, self->dso->name);
 363 }
 364
 365
 366 struct thread {
 367         struct rb_node   rb_node;
 368         struct list_head maps;
 369         pid_t            pid;
 370         char             *comm;
 371 };
 372
 373 static struct thread *thread__new(pid_t pid)
 374 {
 375         struct thread *self = malloc(sizeof(*self));
 376
 377         if (self != NULL) {
 378                 self->pid = pid;
 379                 self->comm = malloc(32);
 380                 if (self->comm)
 381                         snprintf(self->comm, 32, ":%d", self->pid);
 382                 INIT_LIST_HEAD(&self->maps);
 383         }
 384
 385         return self;
 386 }
 387
 388 static unsigned int dsos__col_width,
 389                     comms__col_width,
 390                     threads__col_width;
 391
 392 static int thread__set_comm(struct thread *self, const char *comm)
 393 {
 394         if (self->comm)
 395                 free(self->comm);
 396         self->comm = strdup(comm);
 397         if (!self->comm)
 398                 return -ENOMEM;
 399
 400         if (!col_width_list_str && !field_sep &&
 401             (!comm_list || strlist__has_entry(comm_list, comm))) {
 402                 unsigned int slen = strlen(comm);
 403                 if (slen > comms__col_width) {
 404                         comms__col_width = slen;
 405                         threads__col_width = slen + 6;
 406                 }
 407         }
 408
 409         return 0;
 410 }
 411
 412 static size_t thread__fprintf(struct thread *self, FILE *fp)
 413 {
 414         struct map *pos;
 415         size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
 416
 417         list_for_each_entry(pos, &self->maps, node)
 418                 ret += map__fprintf(pos, fp);
 419
 420         return ret;
 421 }
 422
 423
 424 static struct rb_root threads;
 425 static struct thread *last_match;
 426
 427 static struct thread *threads__findnew(pid_t pid)
 428 {
 429         struct rb_node **p = &threads.rb_node;
 430         struct rb_node *parent = NULL;
 431         struct thread *th;
 432
 433         /*
 434          * Font-end cache - PID lookups come in blocks,
 435          * so most of the time we dont have to look up
 436          * the full rbtree:
 437          */
 438         if (last_match && last_match->pid == pid)
 439                 return last_match;
 440
 441         while (*p != NULL) {
 442                 parent = *p;
 443                 th = rb_entry(parent, struct thread, rb_node);
 444
 445                 if (th->pid == pid) {
 446                         last_match = th;
 447                         return th;
 448                 }
 449
 450                 if (pid < th->pid)
 451                         p = &(*p)->rb_left;
 452                 else
 453                         p = &(*p)->rb_right;
 454         }
 455
 456         th = thread__new(pid);
 457         if (th != NULL) {
 458                 rb_link_node(&th->rb_node, parent, p);
 459                 rb_insert_color(&th->rb_node, &threads);
 460                 last_match = th;
 461         }
 462
 463         return th;
 464 }
 465
 466 static void thread__insert_map(struct thread *self, struct map *map)
 467 {
 468         struct map *pos, *tmp;
 469
 470         list_for_each_entry_safe(pos, tmp, &self->maps, node) {
 471                 if (map__overlap(pos, map)) {
 472                         if (verbose >= 2) {
 473                                 printf("overlapping maps:\n");
 474                                 map__fprintf(map, stdout);
 475                                 map__fprintf(pos, stdout);
 476                         }
 477
 478                         if (map->start <= pos->start && map->end > pos->start)
 479                                 pos->start = map->end;
 480
 481                         if (map->end >= pos->end && map->start < pos->end)
 482                                 pos->end = map->start;
 483
 484                         if (verbose >= 2) {
 485                                 printf("after collision:\n");
 486                                 map__fprintf(pos, stdout);
 487                         }
 488
 489                         if (pos->start >= pos->end) {
 490                                 list_del_init(&pos->node);
 491                                 free(pos);
 492                         }
 493                 }
 494         }
 495
 496         list_add_tail(&map->node, &self->maps);
 497 }
 498
 499 static int thread__fork(struct thread *self, struct thread *parent)
 500 {
 501         struct map *map;
 502
 503         if (self->comm)
 504                 free(self->comm);
 505         self->comm = strdup(parent->comm);
 506         if (!self->comm)
 507                 return -ENOMEM;
 508
 509         list_for_each_entry(map, &parent->maps, node) {
 510                 struct map *new = map__clone(map);
 511                 if (!new)
 512                         return -ENOMEM;
 513                 thread__insert_map(self, new);
 514         }
 515
 516         return 0;
 517 }
 518
 519 static struct map *thread__find_map(struct thread *self, u64 ip)
 520 {
 521         struct map *pos;
 522
 523         if (self == NULL)
 524                 return NULL;
 525
 526         list_for_each_entry(pos, &self->maps, node)
 527                 if (ip >= pos->start && ip <= pos->end)
 528                         return pos;
 529
 530         return NULL;
 531 }
 532
 533 static size_t threads__fprintf(FILE *fp)
 534 {
 535         size_t ret = 0;
 536         struct rb_node *nd;
 537
 538         for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
 539                 struct thread *pos = rb_entry(nd, struct thread, rb_node);
 540
 541                 ret += thread__fprintf(pos, fp);
 542         }
 543
 544         return ret;
 545 }
 546
 547 /*
 548  * histogram, sorted on item, collects counts
 549  */
 550
 551 static struct rb_root hist;
 552
 553 struct hist_entry {
 554         struct rb_node          rb_node;
 555
 556         struct thread           *thread;
 557         struct map              *map;
 558         struct dso              *dso;
 559         struct symbol           *sym;
 560         struct symbol           *parent;
 561         u64                     ip;
 562         char                    level;
 563         struct callchain_node   callchain;
 564         struct rb_root          sorted_chain;
 565
 566         u64                     count;
 567 };
 568
 569 /*
 570  * configurable sorting bits
 571  */
 572
 573 struct sort_entry {
 574         struct list_head list;
 575
 576         char *header;
 577
 578         int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
 579         int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
 580         size_t  (*print)(FILE *fp, struct hist_entry *, unsigned int width);
 581         unsigned int *width;
 582         bool    elide;
 583 };
 584
 585 static int64_t cmp_null(void *l, void *r)
 586 {
 587         if (!l && !r)
 588                 return 0;
 589         else if (!l)
 590                 return -1;
 591         else
 592                 return 1;
 593 }
 594
 595 /* --sort pid */
 596
 597 static int64_t
 598 sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
 599 {
 600         return right->thread->pid - left->thread->pid;
 601 }
 602
 603 static size_t
 604 sort__thread_print(FILE *fp, struct hist_entry *self, unsigned int width)
 605 {
 606         return repsep_fprintf(fp, "%*s:%5d", width - 6,
 607                               self->thread->comm ?: "", self->thread->pid);
 608 }
 609
 610 static struct sort_entry sort_thread = {
 611         .header = "Command:  Pid",
 612         .cmp    = sort__thread_cmp,
 613         .print  = sort__thread_print,
 614         .width  = &threads__col_width,
 615 };
 616
 617 /* --sort comm */
 618
 619 static int64_t
 620 sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
 621 {
 622         return right->thread->pid - left->thread->pid;
 623 }
 624
 625 static int64_t
 626 sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
 627 {
 628         char *comm_l = left->thread->comm;
 629         char *comm_r = right->thread->comm;
 630
 631         if (!comm_l || !comm_r)
 632                 return cmp_null(comm_l, comm_r);
 633
 634         return strcmp(comm_l, comm_r);
 635 }
 636
 637 static size_t
 638 sort__comm_print(FILE *fp, struct hist_entry *self, unsigned int width)
 639 {
 640         return repsep_fprintf(fp, "%*s", width, self->thread->comm);
 641 }
 642
 643 static struct sort_entry sort_comm = {
 644         .header         = "Command",
 645         .cmp            = sort__comm_cmp,
 646         .collapse       = sort__comm_collapse,
 647         .print          = sort__comm_print,
 648         .width          = &comms__col_width,
 649 };
 650
 651 /* --sort dso */
 652
 653 static int64_t
 654 sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
 655 {
 656         struct dso *dso_l = left->dso;
 657         struct dso *dso_r = right->dso;
 658
 659         if (!dso_l || !dso_r)
 660                 return cmp_null(dso_l, dso_r);
 661
 662         return strcmp(dso_l->name, dso_r->name);
 663 }
 664
 665 static size_t
 666 sort__dso_print(FILE *fp, struct hist_entry *self, unsigned int width)
 667 {
 668         if (self->dso)
 669                 return repsep_fprintf(fp, "%-*s", width, self->dso->name);
 670
 671         return repsep_fprintf(fp, "%*llx", width, (u64)self->ip);
 672 }
 673
 674 static struct sort_entry sort_dso = {
 675         .header = "Shared Object",
 676         .cmp    = sort__dso_cmp,
 677         .print  = sort__dso_print,
 678         .width  = &dsos__col_width,
 679 };
 680
 681 /* --sort symbol */
 682
 683 static int64_t
 684 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 685 {
 686         u64 ip_l, ip_r;
 687
 688         if (left->sym == right->sym)
 689                 return 0;
 690
 691         ip_l = left->sym ? left->sym->start : left->ip;
 692         ip_r = right->sym ? right->sym->start : right->ip;
 693
 694         return (int64_t)(ip_r - ip_l);
 695 }
 696
 697 static size_t
 698 sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used)
 699 {
 700         size_t ret = 0;
 701
 702         if (verbose)
 703                 ret += repsep_fprintf(fp, "%#018llx  ", (u64)self->ip);
 704
 705         ret += repsep_fprintf(fp, "[%c] ", self->level);
 706         if (self->sym) {
 707                 ret += repsep_fprintf(fp, "%s", self->sym->name);
 708
 709                 if (self->sym->module)
 710                         ret += repsep_fprintf(fp, "\t[%s]",
 711                                              self->sym->module->name);
 712         } else {
 713                 ret += repsep_fprintf(fp, "%#016llx", (u64)self->ip);
 714         }
 715
 716         return ret;
 717 }
 718
 719 static struct sort_entry sort_sym = {
 720         .header = "Symbol",
 721         .cmp    = sort__sym_cmp,
 722         .print  = sort__sym_print,
 723 };
 724
 725 /* --sort parent */
 726
 727 static int64_t
 728 sort__parent_cmp(struct hist_entry *left, struct hist_entry *right)
 729 {
 730         struct symbol *sym_l = left->parent;
 731         struct symbol *sym_r = right->parent;
 732
 733         if (!sym_l || !sym_r)
 734                 return cmp_null(sym_l, sym_r);
 735
 736         return strcmp(sym_l->name, sym_r->name);
 737 }
 738
 739 static size_t
 740 sort__parent_print(FILE *fp, struct hist_entry *self, unsigned int width)
 741 {
 742         return repsep_fprintf(fp, "%-*s", width,
 743                               self->parent ? self->parent->name : "[other]");
 744 }
 745
 746 static unsigned int parent_symbol__col_width;
 747
 748 static struct sort_entry sort_parent = {
 749         .header = "Parent symbol",
 750         .cmp    = sort__parent_cmp,
 751         .print  = sort__parent_print,
 752         .width  = &parent_symbol__col_width,
 753 };
 754
 755 static int sort__need_collapse = 0;
 756 static int sort__has_parent = 0;
 757
 758 struct sort_dimension {
 759         char                    *name;
 760         struct sort_entry       *entry;
 761         int                     taken;
 762 };
 763
 764 static struct sort_dimension sort_dimensions[] = {
 765         { .name = "pid",        .entry = &sort_thread,  },
 766         { .name = "comm",       .entry = &sort_comm,    },
 767         { .name = "dso",        .entry = &sort_dso,     },
 768         { .name = "symbol",     .entry = &sort_sym,     },
 769         { .name = "parent",     .entry = &sort_parent,  },
 770 };
 771
 772 static LIST_HEAD(hist_entry__sort_list);
 773
 774 static int sort_dimension__add(char *tok)
 775 {
 776         unsigned int i;
 777
 778         for (i = 0; i < ARRAY_SIZE(sort_dimensions); i++) {
 779                 struct sort_dimension *sd = &sort_dimensions[i];
 780
 781                 if (sd->taken)
 782                         continue;
 783
 784                 if (strncasecmp(tok, sd->name, strlen(tok)))
 785                         continue;
 786
 787                 if (sd->entry->collapse)
 788                         sort__need_collapse = 1;
 789
 790                 if (sd->entry == &sort_parent) {
 791                         int ret = regcomp(&parent_regex, parent_pattern, REG_EXTENDED);
 792                         if (ret) {
 793                                 char err[BUFSIZ];
 794
 795                                 regerror(ret, &parent_regex, err, sizeof(err));
 796                                 fprintf(stderr, "Invalid regex: %s\n%s",
 797                                         parent_pattern, err);
 798                                 exit(-1);
 799                         }
 800                         sort__has_parent = 1;
 801                 }
 802
 803                 list_add_tail(&sd->entry->list, &hist_entry__sort_list);
 804                 sd->taken = 1;
 805
 806                 return 0;
 807         }
 808
 809         return -ESRCH;
 810 }
 811
 812 static int64_t
 813 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 814 {
 815         struct sort_entry *se;
 816         int64_t cmp = 0;
 817
 818         list_for_each_entry(se, &hist_entry__sort_list, list) {
 819                 cmp = se->cmp(left, right);
 820                 if (cmp)
 821                         break;
 822         }
 823
 824         return cmp;
 825 }
 826
 827 static int64_t
 828 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 829 {
 830         struct sort_entry *se;
 831         int64_t cmp = 0;
 832
 833         list_for_each_entry(se, &hist_entry__sort_list, list) {
 834                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 835
 836                 f = se->collapse ?: se->cmp;
 837
 838                 cmp = f(left, right);
 839                 if (cmp)
 840                         break;
 841         }
 842
 843         return cmp;
 844 }
 845
 846 static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask)
 847 {
 848         int i;
 849         size_t ret = 0;
 850
 851         ret += fprintf(fp, "%s", "                ");
 852
 853         for (i = 0; i < depth; i++)
 854                 if (depth_mask & (1 << i))
 855                         ret += fprintf(fp, "|          ");
 856                 else
 857                         ret += fprintf(fp, "           ");
 858
 859         ret += fprintf(fp, "\n");
 860
 861         return ret;
 862 }
 863 static size_t
 864 ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain, int depth,
 865                        int depth_mask, int count, u64 total_samples,
 866                        int hits)
 867 {
 868         int i;
 869         size_t ret = 0;
 870
 871         ret += fprintf(fp, "%s", "                ");
 872         for (i = 0; i < depth; i++) {
 873                 if (depth_mask & (1 << i))
 874                         ret += fprintf(fp, "|");
 875                 else
 876                         ret += fprintf(fp, " ");
 877                 if (!count && i == depth - 1) {
 878                         double percent;
 879
 880                         percent = hits * 100.0 / total_samples;
 881                         ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
 882                 } else
 883                         ret += fprintf(fp, "%s", "          ");
 884         }
 885         if (chain->sym)
 886                 ret += fprintf(fp, "%s\n", chain->sym->name);
 887         else
 888                 ret += fprintf(fp, "%p\n", (void *)(long)chain->ip);
 889
 890         return ret;
 891 }
 892
 893 static size_t
 894 callchain__fprintf_graph(FILE *fp, struct callchain_node *self,
 895                         u64 total_samples, int depth, int depth_mask)
 896 {
 897         struct rb_node *node, *next;
 898         struct callchain_node *child;
 899         struct callchain_list *chain;
 900         int new_depth_mask = depth_mask;
 901         u64 new_total;
 902         size_t ret = 0;
 903         int i;
 904
 905         if (callchain_param.mode == CHAIN_GRAPH_REL)
 906                 new_total = self->children_hit;
 907         else
 908                 new_total = total_samples;
 909
 910         node = rb_first(&self->rb_root);
 911         while (node) {
 912                 child = rb_entry(node, struct callchain_node, rb_node);
 913
 914                 /*
 915                  * The depth mask manages the output of pipes that show
 916                  * the depth. We don't want to keep the pipes of the current
 917                  * level for the last child of this depth
 918                  */
 919                 next = rb_next(node);
 920                 if (!next)
 921                         new_depth_mask &= ~(1 << (depth - 1));
 922
 923                 /*
 924                  * But we keep the older depth mask for the line seperator
 925                  * to keep the level link until we reach the last child
 926                  */
 927                 ret += ipchain__fprintf_graph_line(fp, depth, depth_mask);
 928                 i = 0;
 929                 list_for_each_entry(chain, &child->val, list) {
 930                         if (chain->ip >= PERF_CONTEXT_MAX)
 931                                 continue;
 932                         ret += ipchain__fprintf_graph(fp, chain, depth,
 933                                                       new_depth_mask, i++,
 934                                                       new_total,
 935                                                       cumul_hits(child));
 936                 }
 937                 ret += callchain__fprintf_graph(fp, child, new_total,
 938                                                 depth + 1,
 939                                                 new_depth_mask | (1 << depth));
 940                 node = next;
 941         }
 942
 943         return ret;
 944 }
 945
 946 static size_t
 947 callchain__fprintf_flat(FILE *fp, struct callchain_node *self,
 948                         u64 total_samples)
 949 {
 950         struct callchain_list *chain;
 951         size_t ret = 0;
 952
 953         if (!self)
 954                 return 0;
 955
 956         ret += callchain__fprintf_flat(fp, self->parent, total_samples);
 957
 958
 959         list_for_each_entry(chain, &self->val, list) {
 960                 if (chain->ip >= PERF_CONTEXT_MAX)
 961                         continue;
 962                 if (chain->sym)
 963                         ret += fprintf(fp, "                %s\n", chain->sym->name);
 964                 else
 965                         ret += fprintf(fp, "                %p\n",
 966                                         (void *)(long)chain->ip);
 967         }
 968
 969         return ret;
 970 }
 971
 972 static size_t
 973 hist_entry_callchain__fprintf(FILE *fp, struct hist_entry *self,
 974                               u64 total_samples)
 975 {
 976         struct rb_node *rb_node;
 977         struct callchain_node *chain;
 978         size_t ret = 0;
 979
 980         rb_node = rb_first(&self->sorted_chain);
 981         while (rb_node) {
 982                 double percent;
 983
 984                 chain = rb_entry(rb_node, struct callchain_node, rb_node);
 985                 percent = chain->hit * 100.0 / total_samples;
 986                 switch (callchain_param.mode) {
 987                 case CHAIN_FLAT:
 988                         ret += percent_color_fprintf(fp, "           %6.2f%%\n",
 989                                                      percent);
 990                         ret += callchain__fprintf_flat(fp, chain, total_samples);
 991                         break;
 992                 case CHAIN_GRAPH_ABS: /* Falldown */
 993                 case CHAIN_GRAPH_REL:
 994                         ret += callchain__fprintf_graph(fp, chain,
 995                                                         total_samples, 1, 1);
 996                 default:
 997                         break;
 998                 }
 999                 ret += fprintf(fp, "\n");
1000                 rb_node = rb_next(rb_node);
1001         }
1002
1003         return ret;
1004 }
1005
1006
1007 static size_t
1008 hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
1009 {
1010         struct sort_entry *se;
1011         size_t ret;
1012
1013         if (exclude_other && !self->parent)
1014                 return 0;
1015
1016         if (total_samples)
1017                 ret = percent_color_fprintf(fp,
1018                                             field_sep ? "%.2f" : "   %6.2f%%",
1019                                         (self->count * 100.0) / total_samples);
1020         else
1021                 ret = fprintf(fp, field_sep ? "%lld" : "%12lld ", self->count);
1022
1023         if (show_nr_samples) {
1024                 if (field_sep)
1025                         fprintf(fp, "%c%lld", *field_sep, self->count);
1026                 else
1027                         fprintf(fp, "%11lld", self->count);
1028         }
1029
1030         list_for_each_entry(se, &hist_entry__sort_list, list) {
1031                 if (se->elide)
1032                         continue;
1033
1034                 fprintf(fp, "%s", field_sep ?: "  ");
1035                 ret += se->print(fp, self, se->width ? *se->width : 0);
1036         }
1037
1038         ret += fprintf(fp, "\n");
1039
1040         if (callchain)
1041                 hist_entry_callchain__fprintf(fp, self, total_samples);
1042
1043         return ret;
1044 }
1045
1046 /*
1047  *
1048  */
1049
1050 static void dso__calc_col_width(struct dso *self)
1051 {
1052         if (!col_width_list_str && !field_sep &&
1053             (!dso_list || strlist__has_entry(dso_list, self->name))) {
1054                 unsigned int slen = strlen(self->name);
1055                 if (slen > dsos__col_width)
1056                         dsos__col_width = slen;
1057         }
1058
1059         self->slen_calculated = 1;
1060 }
1061
1062 static struct symbol *
1063 resolve_symbol(struct thread *thread, struct map **mapp,
1064                struct dso **dsop, u64 *ipp)
1065 {
1066         struct dso *dso = dsop ? *dsop : NULL;
1067         struct map *map = mapp ? *mapp : NULL;
1068         u64 ip = *ipp;
1069
1070         if (!thread)
1071                 return NULL;
1072
1073         if (dso)
1074                 goto got_dso;
1075
1076         if (map)
1077                 goto got_map;
1078
1079         map = thread__find_map(thread, ip);
1080         if (map != NULL) {
1081                 /*
1082                  * We have to do this here as we may have a dso
1083                  * with no symbol hit that has a name longer than
1084                  * the ones with symbols sampled.
1085                  */
1086                 if (!sort_dso.elide && !map->dso->slen_calculated)
1087                         dso__calc_col_width(map->dso);
1088
1089                 if (mapp)
1090                         *mapp = map;
1091 got_map:
1092                 ip = map->map_ip(map, ip);
1093
1094                 dso = map->dso;
1095         } else {
1096                 /*
1097                  * If this is outside of all known maps,
1098                  * and is a negative address, try to look it
1099                  * up in the kernel dso, as it might be a
1100                  * vsyscall (which executes in user-mode):
1101                  */
1102                 if ((long long)ip < 0)
1103                 dso = kernel_dso;
1104         }
1105         dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
1106         dprintf(" ...... map: %Lx -> %Lx\n", *ipp, ip);
1107         *ipp  = ip;
1108
1109         if (dsop)
1110                 *dsop = dso;
1111
1112         if (!dso)
1113                 return NULL;
1114 got_dso:
1115         return dso->find_symbol(dso, ip);
1116 }
1117
1118 static int call__match(struct symbol *sym)
1119 {
1120         if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
1121                 return 1;
1122
1123         return 0;
1124 }
1125
1126 static struct symbol **
1127 resolve_callchain(struct thread *thread, struct map *map __used,
1128                     struct ip_callchain *chain, struct hist_entry *entry)
1129 {
1130         u64 context = PERF_CONTEXT_MAX;
1131         struct symbol **syms = NULL;
1132         unsigned int i;
1133
1134         if (callchain) {
1135                 syms = calloc(chain->nr, sizeof(*syms));
1136                 if (!syms) {
1137                         fprintf(stderr, "Can't allocate memory for symbols\n");
1138                         exit(-1);
1139                 }
1140         }
1141
1142         for (i = 0; i < chain->nr; i++) {
1143                 u64 ip = chain->ips[i];
1144                 struct dso *dso = NULL;
1145                 struct symbol *sym;
1146
1147                 if (ip >= PERF_CONTEXT_MAX) {
1148                         context = ip;
1149                         continue;
1150                 }
1151
1152                 switch (context) {
1153                 case PERF_CONTEXT_HV:
1154                         dso = hypervisor_dso;
1155                         break;
1156                 case PERF_CONTEXT_KERNEL:
1157                         dso = kernel_dso;
1158                         break;
1159                 default:
1160                         break;
1161                 }
1162
1163                 sym = resolve_symbol(thread, NULL, &dso, &ip);
1164
1165                 if (sym) {
1166                         if (sort__has_parent && call__match(sym) &&
1167                             !entry->parent)
1168                                 entry->parent = sym;
1169                         if (!callchain)
1170                                 break;
1171                         syms[i] = sym;
1172                 }
1173         }
1174
1175         return syms;
1176 }
1177
1178 /*
1179  * collect histogram counts
1180  */
1181
1182 static int
1183 hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
1184                 struct symbol *sym, u64 ip, struct ip_callchain *chain,
1185                 char level, u64 count)
1186 {
1187         struct rb_node **p = &hist.rb_node;
1188         struct rb_node *parent = NULL;
1189         struct hist_entry *he;
1190         struct symbol **syms = NULL;
1191         struct hist_entry entry = {
1192                 .thread = thread,
1193                 .map    = map,
1194                 .dso    = dso,
1195                 .sym    = sym,
1196                 .ip     = ip,
1197                 .level  = level,
1198                 .count  = count,
1199                 .parent = NULL,
1200                 .sorted_chain = RB_ROOT
1201         };
1202         int cmp;
1203
1204         if ((sort__has_parent || callchain) && chain)
1205                 syms = resolve_callchain(thread, map, chain, &entry);
1206
1207         while (*p != NULL) {
1208                 parent = *p;
1209                 he = rb_entry(parent, struct hist_entry, rb_node);
1210
1211                 cmp = hist_entry__cmp(&entry, he);
1212
1213                 if (!cmp) {
1214                         he->count += count;
1215                         if (callchain) {
1216                                 append_chain(&he->callchain, chain, syms);
1217                                 free(syms);
1218                         }
1219                         return 0;
1220                 }
1221
1222                 if (cmp < 0)
1223                         p = &(*p)->rb_left;
1224                 else
1225                         p = &(*p)->rb_right;
1226         }
1227
1228         he = malloc(sizeof(*he));
1229         if (!he)
1230                 return -ENOMEM;
1231         *he = entry;
1232         if (callchain) {
1233                 callchain_init(&he->callchain);
1234                 append_chain(&he->callchain, chain, syms);
1235                 free(syms);
1236         }
1237         rb_link_node(&he->rb_node, parent, p);
1238         rb_insert_color(&he->rb_node, &hist);
1239
1240         return 0;
1241 }
1242
1243 static void hist_entry__free(struct hist_entry *he)
1244 {
1245         free(he);
1246 }
1247
1248 /*
1249  * collapse the histogram
1250  */
1251
1252 static struct rb_root collapse_hists;
1253
1254 static void collapse__insert_entry(struct hist_entry *he)
1255 {
1256         struct rb_node **p = &collapse_hists.rb_node;
1257         struct rb_node *parent = NULL;
1258         struct hist_entry *iter;
1259         int64_t cmp;
1260
1261         while (*p != NULL) {
1262                 parent = *p;
1263                 iter = rb_entry(parent, struct hist_entry, rb_node);
1264
1265                 cmp = hist_entry__collapse(iter, he);
1266
1267                 if (!cmp) {
1268                         iter->count += he->count;
1269                         hist_entry__free(he);
1270                         return;
1271                 }
1272
1273                 if (cmp < 0)
1274                         p = &(*p)->rb_left;
1275                 else
1276                         p = &(*p)->rb_right;
1277         }
1278
1279         rb_link_node(&he->rb_node, parent, p);
1280         rb_insert_color(&he->rb_node, &collapse_hists);
1281 }
1282
1283 static void collapse__resort(void)
1284 {
1285         struct rb_node *next;
1286         struct hist_entry *n;
1287
1288         if (!sort__need_collapse)
1289                 return;
1290
1291         next = rb_first(&hist);
1292         while (next) {
1293                 n = rb_entry(next, struct hist_entry, rb_node);
1294                 next = rb_next(&n->rb_node);
1295
1296                 rb_erase(&n->rb_node, &hist);
1297                 collapse__insert_entry(n);
1298         }
1299 }
1300
1301 /*
1302  * reverse the map, sort on count.
1303  */
1304
1305 static struct rb_root output_hists;
1306
1307 static void output__insert_entry(struct hist_entry *he, u64 min_callchain_hits)
1308 {
1309         struct rb_node **p = &output_hists.rb_node;
1310         struct rb_node *parent = NULL;
1311         struct hist_entry *iter;
1312
1313         if (callchain)
1314                 callchain_param.sort(&he->sorted_chain, &he->callchain,
1315                                       min_callchain_hits, &callchain_param);
1316
1317         while (*p != NULL) {
1318                 parent = *p;
1319                 iter = rb_entry(parent, struct hist_entry, rb_node);
1320
1321                 if (he->count > iter->count)
1322                         p = &(*p)->rb_left;
1323                 else
1324                         p = &(*p)->rb_right;
1325         }
1326
1327         rb_link_node(&he->rb_node, parent, p);
1328         rb_insert_color(&he->rb_node, &output_hists);
1329 }
1330
1331 static void output__resort(u64 total_samples)
1332 {
1333         struct rb_node *next;
1334         struct hist_entry *n;
1335         struct rb_root *tree = &hist;
1336         u64 min_callchain_hits;
1337
1338         min_callchain_hits = total_samples * (callchain_param.min_percent / 100);
1339
1340         if (sort__need_collapse)
1341                 tree = &collapse_hists;
1342
1343         next = rb_first(tree);
1344
1345         while (next) {
1346                 n = rb_entry(next, struct hist_entry, rb_node);
1347                 next = rb_next(&n->rb_node);
1348
1349                 rb_erase(&n->rb_node, tree);
1350                 output__insert_entry(n, min_callchain_hits);
1351         }
1352 }
1353
1354 static size_t output__fprintf(FILE *fp, u64 total_samples)
1355 {
1356         struct hist_entry *pos;
1357         struct sort_entry *se;
1358         struct rb_node *nd;
1359         size_t ret = 0;
1360         unsigned int width;
1361         char *col_width = col_width_list_str;
1362
1363         fprintf(fp, "# Samples: %Ld\n", (u64)total_samples);
1364         fprintf(fp, "#\n");
1365
1366         fprintf(fp, "# Overhead");
1367         if (show_nr_samples) {
1368                 if (field_sep)
1369                         fprintf(fp, "%cSamples", *field_sep);
1370                 else
1371                         fputs("  Samples  ", fp);
1372         }
1373         list_for_each_entry(se, &hist_entry__sort_list, list) {
1374                 if (se->elide)
1375                         continue;
1376                 if (field_sep) {
1377                         fprintf(fp, "%c%s", *field_sep, se->header);
1378                         continue;
1379                 }
1380                 width = strlen(se->header);
1381                 if (se->width) {
1382                         if (col_width_list_str) {
1383                                 if (col_width) {
1384                                         *se->width = atoi(col_width);
1385                                         col_width = strchr(col_width, ',');
1386                                         if (col_width)
1387                                                 ++col_width;
1388                                 }
1389                         }
1390                         width = *se->width = max(*se->width, width);
1391                 }
1392                 fprintf(fp, "  %*s", width, se->header);
1393         }
1394         fprintf(fp, "\n");
1395
1396         if (field_sep)
1397                 goto print_entries;
1398
1399         fprintf(fp, "# ........");
1400         if (show_nr_samples)
1401                 fprintf(fp, " ..........");
1402         list_for_each_entry(se, &hist_entry__sort_list, list) {
1403                 unsigned int i;
1404
1405                 if (se->elide)
1406                         continue;
1407
1408                 fprintf(fp, "  ");
1409                 if (se->width)
1410                         width = *se->width;
1411                 else
1412                         width = strlen(se->header);
1413                 for (i = 0; i < width; i++)
1414                         fprintf(fp, ".");
1415         }
1416         fprintf(fp, "\n");
1417
1418         fprintf(fp, "#\n");
1419
1420 print_entries:
1421         for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
1422                 pos = rb_entry(nd, struct hist_entry, rb_node);
1423                 ret += hist_entry__fprintf(fp, pos, total_samples);
1424         }
1425
1426         if (sort_order == default_sort_order &&
1427                         parent_pattern == default_parent_pattern) {
1428                 fprintf(fp, "#\n");
1429                 fprintf(fp, "# (For a higher level overview, try: perf report --sort comm,dso)\n");
1430                 fprintf(fp, "#\n");
1431         }
1432         fprintf(fp, "\n");
1433
1434         return ret;
1435 }
1436
1437 static void register_idle_thread(void)
1438 {
1439         struct thread *thread = threads__findnew(0);
1440
1441         if (thread == NULL ||
1442                         thread__set_comm(thread, "[idle]")) {
1443                 fprintf(stderr, "problem inserting idle task.\n");
1444                 exit(-1);
1445         }
1446 }
1447
1448 static unsigned long total = 0,
1449                      total_mmap = 0,
1450                      total_comm = 0,
1451                      total_fork = 0,
1452                      total_unknown = 0,
1453                      total_lost = 0;
1454
1455 static int validate_chain(struct ip_callchain *chain, event_t *event)
1456 {
1457         unsigned int chain_size;
1458
1459         chain_size = event->header.size;
1460         chain_size -= (unsigned long)&event->ip.__more_data - (unsigned long)event;
1461
1462         if (chain->nr*sizeof(u64) > chain_size)
1463                 return -1;
1464
1465         return 0;
1466 }
1467
1468 static int
1469 process_sample_event(event_t *event, unsigned long offset, unsigned long head)
1470 {
1471         char level;
1472         int show = 0;
1473         struct dso *dso = NULL;
1474         struct thread *thread = threads__findnew(event->ip.pid);
1475         u64 ip = event->ip.ip;
1476         u64 period = 1;
1477         struct map *map = NULL;
1478         void *more_data = event->ip.__more_data;
1479         struct ip_callchain *chain = NULL;
1480         int cpumode;
1481
1482         if (sample_type & PERF_SAMPLE_PERIOD) {
1483                 period = *(u64 *)more_data;
1484                 more_data += sizeof(u64);
1485         }
1486
1487         dprintf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d: %p period: %Ld\n",
1488                 (void *)(offset + head),
1489                 (void *)(long)(event->header.size),
1490                 event->header.misc,
1491                 event->ip.pid,
1492                 (void *)(long)ip,
1493                 (long long)period);
1494
1495         if (sample_type & PERF_SAMPLE_CALLCHAIN) {
1496                 unsigned int i;
1497
1498                 chain = (void *)more_data;
1499
1500                 dprintf("... chain: nr:%Lu\n", chain->nr);
1501
1502                 if (validate_chain(chain, event) < 0) {
1503                         eprintf("call-chain problem with event, skipping it.\n");
1504                         return 0;
1505                 }
1506
1507                 if (dump_trace) {
1508                         for (i = 0; i < chain->nr; i++)
1509                                 dprintf("..... %2d: %016Lx\n", i, chain->ips[i]);
1510                 }
1511         }
1512
1513         dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
1514
1515         if (thread == NULL) {
1516                 eprintf("problem processing %d event, skipping it.\n",
1517                         event->header.type);
1518                 return -1;
1519         }
1520
1521         if (comm_list && !strlist__has_entry(comm_list, thread->comm))
1522                 return 0;
1523
1524         cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
1525
1526         if (cpumode == PERF_EVENT_MISC_KERNEL) {
1527                 show = SHOW_KERNEL;
1528                 level = 'k';
1529
1530                 dso = kernel_dso;
1531
1532                 dprintf(" ...... dso: %s\n", dso->name);
1533
1534         } else if (cpumode == PERF_EVENT_MISC_USER) {
1535
1536                 show = SHOW_USER;
1537                 level = '.';
1538
1539         } else {
1540                 show = SHOW_HV;
1541                 level = 'H';
1542
1543                 dso = hypervisor_dso;
1544
1545                 dprintf(" ...... dso: [hypervisor]\n");
1546         }
1547
1548         if (show & show_mask) {
1549                 struct symbol *sym = resolve_symbol(thread, &map, &dso, &ip);
1550
1551                 if (dso_list && dso && dso->name && !strlist__has_entry(dso_list, dso->name))
1552                         return 0;
1553
1554                 if (sym_list && sym && !strlist__has_entry(sym_list, sym->name))
1555                         return 0;
1556
1557                 if (hist_entry__add(thread, map, dso, sym, ip, chain, level, period)) {
1558                         eprintf("problem incrementing symbol count, skipping event\n");
1559                         return -1;
1560                 }
1561         }
1562         total += period;
1563
1564         return 0;
1565 }
1566
1567 static int
1568 process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
1569 {
1570         struct thread *thread = threads__findnew(event->mmap.pid);
1571         struct map *map = map__new(&event->mmap);
1572
1573         dprintf("%p [%p]: PERF_EVENT_MMAP %d: [%p(%p) @ %p]: %s\n",
1574                 (void *)(offset + head),
1575                 (void *)(long)(event->header.size),
1576                 event->mmap.pid,
1577                 (void *)(long)event->mmap.start,
1578                 (void *)(long)event->mmap.len,
1579                 (void *)(long)event->mmap.pgoff,
1580                 event->mmap.filename);
1581
1582         if (thread == NULL || map == NULL) {
1583                 dprintf("problem processing PERF_EVENT_MMAP, skipping event.\n");
1584                 return 0;
1585         }
1586
1587         thread__insert_map(thread, map);
1588         total_mmap++;
1589
1590         return 0;
1591 }
1592
1593 static int
1594 process_comm_event(event_t *event, unsigned long offset, unsigned long head)
1595 {
1596         struct thread *thread = threads__findnew(event->comm.pid);
1597
1598         dprintf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
1599                 (void *)(offset + head),
1600                 (void *)(long)(event->header.size),
1601                 event->comm.comm, event->comm.pid);
1602
1603         if (thread == NULL ||
1604             thread__set_comm(thread, event->comm.comm)) {
1605                 dprintf("problem processing PERF_EVENT_COMM, skipping event.\n");
1606                 return -1;
1607         }
1608         total_comm++;
1609
1610         return 0;
1611 }
1612
1613 static int
1614 process_task_event(event_t *event, unsigned long offset, unsigned long head)
1615 {
1616         struct thread *thread = threads__findnew(event->fork.pid);
1617         struct thread *parent = threads__findnew(event->fork.ppid);
1618
1619         dprintf("%p [%p]: PERF_EVENT_%s: (%d:%d):(%d:%d)\n",
1620                 (void *)(offset + head),
1621                 (void *)(long)(event->header.size),
1622                 event->header.type == PERF_EVENT_FORK ? "FORK" : "EXIT",
1623                 event->fork.pid, event->fork.tid,
1624                 event->fork.ppid, event->fork.ptid);
1625
1626         /*
1627          * A thread clone will have the same PID for both
1628          * parent and child.
1629          */
1630         if (thread == parent)
1631                 return 0;
1632
1633         if (event->header.type == PERF_EVENT_EXIT)
1634                 return 0;
1635
1636         if (!thread || !parent || thread__fork(thread, parent)) {
1637                 dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
1638                 return -1;
1639         }
1640         total_fork++;
1641
1642         return 0;
1643 }
1644
1645 static int
1646 process_lost_event(event_t *event, unsigned long offset, unsigned long head)
1647 {
1648         dprintf("%p [%p]: PERF_EVENT_LOST: id:%Ld: lost:%Ld\n",
1649                 (void *)(offset + head),
1650                 (void *)(long)(event->header.size),
1651                 event->lost.id,
1652                 event->lost.lost);
1653
1654         total_lost += event->lost.lost;
1655
1656         return 0;
1657 }
1658
1659 static void trace_event(event_t *event)
1660 {
1661         unsigned char *raw_event = (void *)event;
1662         char *color = PERF_COLOR_BLUE;
1663         int i, j;
1664
1665         if (!dump_trace)
1666                 return;
1667
1668         dprintf(".");
1669         cdprintf("\n. ... raw event: size %d bytes\n", event->header.size);
1670
1671         for (i = 0; i < event->header.size; i++) {
1672                 if ((i & 15) == 0) {
1673                         dprintf(".");
1674                         cdprintf("  %04x: ", i);
1675                 }
1676
1677                 cdprintf(" %02x", raw_event[i]);
1678
1679                 if (((i & 15) == 15) || i == event->header.size-1) {
1680                         cdprintf("  ");
1681                         for (j = 0; j < 15-(i & 15); j++)
1682                                 cdprintf("   ");
1683                         for (j = 0; j < (i & 15); j++) {
1684                                 if (isprint(raw_event[i-15+j]))
1685                                         cdprintf("%c", raw_event[i-15+j]);
1686                                 else
1687                                         cdprintf(".");
1688                         }
1689                         cdprintf("\n");
1690                 }
1691         }
1692         dprintf(".\n");
1693 }
1694
1695 static struct perf_header       *header;
1696
1697 static struct perf_counter_attr *perf_header__find_attr(u64 id)
1698 {
1699         int i;
1700
1701         for (i = 0; i < header->attrs; i++) {
1702                 struct perf_header_attr *attr = header->attr[i];
1703                 int j;
1704
1705                 for (j = 0; j < attr->ids; j++) {
1706                         if (attr->id[j] == id)
1707                                 return &attr->attr;
1708                 }
1709         }
1710
1711         return NULL;
1712 }
1713
1714 static int
1715 process_read_event(event_t *event, unsigned long offset, unsigned long head)
1716 {
1717         struct perf_counter_attr *attr = perf_header__find_attr(event->read.id);
1718
1719         dprintf("%p [%p]: PERF_EVENT_READ: %d %d %s %Lu\n",
1720                         (void *)(offset + head),
1721                         (void *)(long)(event->header.size),
1722                         event->read.pid,
1723                         event->read.tid,
1724                         attr ? __event_name(attr->type, attr->config)
1725                              : "FAIL",
1726                         event->read.value);
1727
1728         return 0;
1729 }
1730
1731 static int
1732 process_event(event_t *event, unsigned long offset, unsigned long head)
1733 {
1734         trace_event(event);
1735
1736         switch (event->header.type) {
1737         case PERF_EVENT_SAMPLE:
1738                 return process_sample_event(event, offset, head);
1739
1740         case PERF_EVENT_MMAP:
1741                 return process_mmap_event(event, offset, head);
1742
1743         case PERF_EVENT_COMM:
1744                 return process_comm_event(event, offset, head);
1745
1746         case PERF_EVENT_FORK:
1747         case PERF_EVENT_EXIT:
1748                 return process_task_event(event, offset, head);
1749
1750         case PERF_EVENT_LOST:
1751                 return process_lost_event(event, offset, head);
1752
1753         case PERF_EVENT_READ:
1754                 return process_read_event(event, offset, head);
1755
1756         /*
1757          * We dont process them right now but they are fine:
1758          */
1759
1760         case PERF_EVENT_THROTTLE:
1761         case PERF_EVENT_UNTHROTTLE:
1762                 return 0;
1763
1764         default:
1765                 return -1;
1766         }
1767
1768         return 0;
1769 }
1770
1771 static u64 perf_header__sample_type(void)
1772 {
1773         u64 sample_type = 0;
1774         int i;
1775
1776         for (i = 0; i < header->attrs; i++) {
1777                 struct perf_header_attr *attr = header->attr[i];
1778
1779                 if (!sample_type)
1780                         sample_type = attr->attr.sample_type;
1781                 else if (sample_type != attr->attr.sample_type)
1782                         die("non matching sample_type");
1783         }
1784
1785         return sample_type;
1786 }
1787
1788 static int __cmd_report(void)
1789 {
1790         int ret, rc = EXIT_FAILURE;
1791         unsigned long offset = 0;
1792         unsigned long head, shift;
1793         struct stat stat;
1794         event_t *event;
1795         uint32_t size;
1796         char *buf;
1797
1798         register_idle_thread();
1799
1800         input = open(input_name, O_RDONLY);
1801         if (input < 0) {
1802                 fprintf(stderr, " failed to open file: %s", input_name);
1803                 if (!strcmp(input_name, "perf.data"))
1804                         fprintf(stderr, "  (try 'perf record' first)");
1805                 fprintf(stderr, "\n");
1806                 exit(-1);
1807         }
1808
1809         ret = fstat(input, &stat);
1810         if (ret < 0) {
1811                 perror("failed to stat file");
1812                 exit(-1);
1813         }
1814
1815         if (!stat.st_size) {
1816                 fprintf(stderr, "zero-sized file, nothing to do!\n");
1817                 exit(0);
1818         }
1819
1820         header = perf_header__read(input);
1821         head = header->data_offset;
1822
1823         sample_type = perf_header__sample_type();
1824
1825         if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
1826                 if (sort__has_parent) {
1827                         fprintf(stderr, "selected --sort parent, but no"
1828                                         " callchain data. Did you call"
1829                                         " perf record without -g?\n");
1830                         exit(-1);
1831                 }
1832                 if (callchain) {
1833                         fprintf(stderr, "selected -c but no callchain data."
1834                                         " Did you call perf record without"
1835                                         " -g?\n");
1836                         exit(-1);
1837                 }
1838         }
1839
1840         if (load_kernel() < 0) {
1841                 perror("failed to load kernel symbols");
1842                 return EXIT_FAILURE;
1843         }
1844
1845         if (!full_paths) {
1846                 if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
1847                         perror("failed to get the current directory");
1848                         return EXIT_FAILURE;
1849                 }
1850                 cwdlen = strlen(cwd);
1851         } else {
1852                 cwd = NULL;
1853                 cwdlen = 0;
1854         }
1855
1856         shift = page_size * (head / page_size);
1857         offset += shift;
1858         head -= shift;
1859
1860 remap:
1861         buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
1862                            MAP_SHARED, input, offset);
1863         if (buf == MAP_FAILED) {
1864                 perror("failed to mmap file");
1865                 exit(-1);
1866         }
1867
1868 more:
1869         event = (event_t *)(buf + head);
1870
1871         size = event->header.size;
1872         if (!size)
1873                 size = 8;
1874
1875         if (head + event->header.size >= page_size * mmap_window) {
1876                 int ret;
1877
1878                 shift = page_size * (head / page_size);
1879
1880                 ret = munmap(buf, page_size * mmap_window);
1881                 assert(ret == 0);
1882
1883                 offset += shift;
1884                 head -= shift;
1885                 goto remap;
1886         }
1887
1888         size = event->header.size;
1889
1890         dprintf("\n%p [%p]: event: %d\n",
1891                         (void *)(offset + head),
1892                         (void *)(long)event->header.size,
1893                         event->header.type);
1894
1895         if (!size || process_event(event, offset, head) < 0) {
1896
1897                 dprintf("%p [%p]: skipping unknown header type: %d\n",
1898                         (void *)(offset + head),
1899                         (void *)(long)(event->header.size),
1900                         event->header.type);
1901
1902                 total_unknown++;
1903
1904                 /*
1905                  * assume we lost track of the stream, check alignment, and
1906                  * increment a single u64 in the hope to catch on again 'soon'.
1907                  */
1908
1909                 if (unlikely(head & 7))
1910                         head &= ~7ULL;
1911
1912                 size = 8;
1913         }
1914
1915         head += size;
1916
1917         if (offset + head >= header->data_offset + header->data_size)
1918                 goto done;
1919
1920         if (offset + head < (unsigned long)stat.st_size)
1921                 goto more;
1922
1923 done:
1924         rc = EXIT_SUCCESS;
1925         close(input);
1926
1927         dprintf("      IP events: %10ld\n", total);
1928         dprintf("    mmap events: %10ld\n", total_mmap);
1929         dprintf("    comm events: %10ld\n", total_comm);
1930         dprintf("    fork events: %10ld\n", total_fork);
1931         dprintf("    lost events: %10ld\n", total_lost);
1932         dprintf(" unknown events: %10ld\n", total_unknown);
1933
1934         if (dump_trace)
1935                 return 0;
1936
1937         if (verbose >= 3)
1938                 threads__fprintf(stdout);
1939
1940         if (verbose >= 2)
1941                 dsos__fprintf(stdout);
1942
1943         collapse__resort();
1944         output__resort(total);
1945         output__fprintf(stdout, total);
1946
1947         return rc;
1948 }
1949
1950 static int
1951 parse_callchain_opt(const struct option *opt __used, const char *arg,
1952                     int unset __used)
1953 {
1954         char *tok;
1955         char *endptr;
1956
1957         callchain = 1;
1958
1959         if (!arg)
1960                 return 0;
1961
1962         tok = strtok((char *)arg, ",");
1963         if (!tok)
1964                 return -1;
1965
1966         /* get the output mode */
1967         if (!strncmp(tok, "graph", strlen(arg)))
1968                 callchain_param.mode = CHAIN_GRAPH_ABS;
1969
1970         else if (!strncmp(tok, "flat", strlen(arg)))
1971                 callchain_param.mode = CHAIN_FLAT;
1972
1973         else if (!strncmp(tok, "fractal", strlen(arg)))
1974                 callchain_param.mode = CHAIN_GRAPH_REL;
1975
1976         else
1977                 return -1;
1978
1979         /* get the min percentage */
1980         tok = strtok(NULL, ",");
1981         if (!tok)
1982                 goto setup;
1983
1984         callchain_param.min_percent = strtod(tok, &endptr);
1985         if (tok == endptr)
1986                 return -1;
1987
1988 setup:
1989         if (register_callchain_param(&callchain_param) < 0) {
1990                 fprintf(stderr, "Can't register callchain params\n");
1991                 return -1;
1992         }
1993         return 0;
1994 }
1995
1996 static const char * const report_usage[] = {
1997         "perf report [<options>] <command>",
1998         NULL
1999 };
2000
2001 static const struct option options[] = {
2002         OPT_STRING('i', "input", &input_name, "file",
2003                     "input file name"),
2004         OPT_BOOLEAN('v', "verbose", &verbose,
2005                     "be more verbose (show symbol address, etc)"),
2006         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
2007                     "dump raw trace in ASCII"),
2008         OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
2009         OPT_BOOLEAN('m', "modules", &modules,
2010                     "load module symbols - WARNING: use only with -k and LIVE kernel"),
2011         OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
2012                     "Show a column with the number of samples"),
2013         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
2014                    "sort by key(s): pid, comm, dso, symbol, parent"),
2015         OPT_BOOLEAN('P', "full-paths", &full_paths,
2016                     "Don't shorten the pathnames taking into account the cwd"),
2017         OPT_STRING('p', "parent", &parent_pattern, "regex",
2018                    "regex filter to identify parent, see: '--sort parent'"),
2019         OPT_BOOLEAN('x', "exclude-other", &exclude_other,
2020                     "Only display entries with parent-match"),
2021         OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
2022                      "Display callchains using output_type and min percent threshold. "
2023                      "Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
2024         OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
2025                    "only consider symbols in these dsos"),
2026         OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",
2027                    "only consider symbols in these comms"),
2028         OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",
2029                    "only consider these symbols"),
2030         OPT_STRING('w', "column-widths", &col_width_list_str,
2031                    "width[,width...]",
2032                    "don't try to adjust column width, use these fixed values"),
2033         OPT_STRING('t', "field-separator", &field_sep, "separator",
2034                    "separator for columns, no spaces will be added between "
2035                    "columns '.' is reserved."),
2036         OPT_END()
2037 };
2038
2039 static void setup_sorting(void)
2040 {
2041         char *tmp, *tok, *str = strdup(sort_order);
2042
2043         for (tok = strtok_r(str, ", ", &tmp);
2044                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
2045                 if (sort_dimension__add(tok) < 0) {
2046                         error("Unknown --sort key: `%s'", tok);
2047                         usage_with_options(report_usage, options);
2048                 }
2049         }
2050
2051         free(str);
2052 }
2053
2054 static void setup_list(struct strlist **list, const char *list_str,
2055                        struct sort_entry *se, const char *list_name,
2056                        FILE *fp)
2057 {
2058         if (list_str) {
2059                 *list = strlist__new(true, list_str);
2060                 if (!*list) {
2061                         fprintf(stderr, "problems parsing %s list\n",
2062                                 list_name);
2063                         exit(129);
2064                 }
2065                 if (strlist__nr_entries(*list) == 1) {
2066                         fprintf(fp, "# %s: %s\n", list_name,
2067                                 strlist__entry(*list, 0)->s);
2068                         se->elide = true;
2069                 }
2070         }
2071 }
2072
2073 int cmd_report(int argc, const char **argv, const char *prefix __used)
2074 {
2075         symbol__init();
2076
2077         page_size = getpagesize();
2078
2079         argc = parse_options(argc, argv, options, report_usage, 0);
2080
2081         setup_sorting();
2082
2083         if (parent_pattern != default_parent_pattern) {
2084                 sort_dimension__add("parent");
2085                 sort_parent.elide = 1;
2086         } else
2087                 exclude_other = 0;
2088
2089         /*
2090          * Any (unrecognized) arguments left?
2091          */
2092         if (argc)
2093                 usage_with_options(report_usage, options);
2094
2095         setup_pager();
2096
2097         setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout);
2098         setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout);
2099         setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout);
2100
2101         if (field_sep && *field_sep == '.') {
2102                 fputs("'.' is the only non valid --field-separator argument\n",
2103                       stderr);
2104                 exit(129);
2105         }
2106
2107         return __cmd_report();
2108 }