tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include "event.h"
   3 #include "debug.h"
   4 #include "session.h"
   5 #include "sort.h"
   6 #include "string.h"
   7 #include "strlist.h"
   8 #include "thread.h"
   9
  10 const char *event__name[] = {
  11         [0]                      = "TOTAL",
  12         [PERF_RECORD_MMAP]       = "MMAP",
  13         [PERF_RECORD_LOST]       = "LOST",
  14         [PERF_RECORD_COMM]       = "COMM",
  15         [PERF_RECORD_EXIT]       = "EXIT",
  16         [PERF_RECORD_THROTTLE]   = "THROTTLE",
  17         [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
  18         [PERF_RECORD_FORK]       = "FORK",
  19         [PERF_RECORD_READ]       = "READ",
  20         [PERF_RECORD_SAMPLE]     = "SAMPLE",
  21         [PERF_RECORD_HEADER_ATTR]        = "ATTR",
  22         [PERF_RECORD_HEADER_EVENT_TYPE]  = "EVENT_TYPE",
  23         [PERF_RECORD_HEADER_TRACING_DATA]        = "TRACING_DATA",
  24         [PERF_RECORD_HEADER_BUILD_ID]    = "BUILD_ID",
  25 };
  26
  27 static pid_t event__synthesize_comm(pid_t pid, int full,
  28                                     event__handler_t process,
  29                                     struct perf_session *session)
  30 {
  31         event_t ev;
  32         char filename[PATH_MAX];
  33         char bf[BUFSIZ];
  34         FILE *fp;
  35         size_t size = 0;
  36         DIR *tasks;
  37         struct dirent dirent, *next;
  38         pid_t tgid = 0;
  39
  40         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  41
  42         fp = fopen(filename, "r");
  43         if (fp == NULL) {
  44 out_race:
  45                 /*
  46                  * We raced with a task exiting - just return:
  47                  */
  48                 pr_debug("couldn't open %s\n", filename);
  49                 return 0;
  50         }
  51
  52         memset(&ev.comm, 0, sizeof(ev.comm));
  53         while (!ev.comm.comm[0] || !ev.comm.pid) {
  54                 if (fgets(bf, sizeof(bf), fp) == NULL)
  55                         goto out_failure;
  56
  57                 if (memcmp(bf, "Name:", 5) == 0) {
  58                         char *name = bf + 5;
  59                         while (*name && isspace(*name))
  60                                 ++name;
  61                         size = strlen(name) - 1;
  62                         memcpy(ev.comm.comm, name, size++);
  63                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  64                         char *tgids = bf + 5;
  65                         while (*tgids && isspace(*tgids))
  66                                 ++tgids;
  67                         tgid = ev.comm.pid = atoi(tgids);
  68                 }
  69         }
  70
  71         ev.comm.header.type = PERF_RECORD_COMM;
  72         size = ALIGN(size, sizeof(u64));
  73         ev.comm.header.size = sizeof(ev.comm) - (sizeof(ev.comm.comm) - size);
  74
  75         if (!full) {
  76                 ev.comm.tid = pid;
  77
  78                 process(&ev, session);
  79                 goto out_fclose;
  80         }
  81
  82         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
  83
  84         tasks = opendir(filename);
  85         if (tasks == NULL)
  86                 goto out_race;
  87
  88         while (!readdir_r(tasks, &dirent, &next) && next) {
  89                 char *end;
  90                 pid = strtol(dirent.d_name, &end, 10);
  91                 if (*end)
  92                         continue;
  93
  94                 ev.comm.tid = pid;
  95
  96                 process(&ev, session);
  97         }
  98         closedir(tasks);
  99
 100 out_fclose:
 101         fclose(fp);
 102         return tgid;
 103
 104 out_failure:
 105         pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
 106         return -1;
 107 }
 108
 109 static int event__synthesize_mmap_events(pid_t pid, pid_t tgid,
 110                                          event__handler_t process,
 111                                          struct perf_session *session)
 112 {
 113         char filename[PATH_MAX];
 114         FILE *fp;
 115
 116         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 117
 118         fp = fopen(filename, "r");
 119         if (fp == NULL) {
 120                 /*
 121                  * We raced with a task exiting - just return:
 122                  */
 123                 pr_debug("couldn't open %s\n", filename);
 124                 return -1;
 125         }
 126
 127         while (1) {
 128                 char bf[BUFSIZ], *pbf = bf;
 129                 event_t ev = {
 130                         .header = {
 131                                 .type = PERF_RECORD_MMAP,
 132                                 /*
 133                                  * Just like the kernel, see __perf_event_mmap
 134                                  * in kernel/perf_event.c
 135                                  */
 136                                 .misc = PERF_RECORD_MISC_USER,
 137                          },
 138                 };
 139                 int n;
 140                 size_t size;
 141                 if (fgets(bf, sizeof(bf), fp) == NULL)
 142                         break;
 143
 144                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 145                 n = hex2u64(pbf, &ev.mmap.start);
 146                 if (n < 0)
 147                         continue;
 148                 pbf += n + 1;
 149                 n = hex2u64(pbf, &ev.mmap.len);
 150                 if (n < 0)
 151                         continue;
 152                 pbf += n + 3;
 153                 if (*pbf == 'x') { /* vm_exec */
 154                         u64 vm_pgoff;
 155                         char *execname = strchr(bf, '/');
 156
 157                         /* Catch VDSO */
 158                         if (execname == NULL)
 159                                 execname = strstr(bf, "[vdso]");
 160
 161                         if (execname == NULL)
 162                                 continue;
 163
 164                         pbf += 3;
 165                         n = hex2u64(pbf, &vm_pgoff);
 166                         /* pgoff is in bytes, not pages */
 167                         if (n >= 0)
 168                                 ev.mmap.pgoff = vm_pgoff << getpagesize();
 169                         else
 170                                 ev.mmap.pgoff = 0;
 171
 172                         size = strlen(execname);
 173                         execname[size - 1] = '\0'; /* Remove \n */
 174                         memcpy(ev.mmap.filename, execname, size);
 175                         size = ALIGN(size, sizeof(u64));
 176                         ev.mmap.len -= ev.mmap.start;
 177                         ev.mmap.header.size = (sizeof(ev.mmap) -
 178                                                (sizeof(ev.mmap.filename) - size));
 179                         ev.mmap.pid = tgid;
 180                         ev.mmap.tid = pid;
 181
 182                         process(&ev, session);
 183                 }
 184         }
 185
 186         fclose(fp);
 187         return 0;
 188 }
 189
 190 int event__synthesize_modules(event__handler_t process,
 191                               struct perf_session *session,
 192                               struct machine *machine)
 193 {
 194         struct rb_node *nd;
 195         struct map_groups *kmaps = &machine->kmaps;
 196         u16 misc;
 197
 198         /*
 199          * kernel uses 0 for user space maps, see kernel/perf_event.c
 200          * __perf_event_mmap
 201          */
 202         if (machine__is_host(machine))
 203                 misc = PERF_RECORD_MISC_KERNEL;
 204         else
 205                 misc = PERF_RECORD_MISC_GUEST_KERNEL;
 206
 207         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 208              nd; nd = rb_next(nd)) {
 209                 event_t ev;
 210                 size_t size;
 211                 struct map *pos = rb_entry(nd, struct map, rb_node);
 212
 213                 if (pos->dso->kernel)
 214                         continue;
 215
 216                 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 217                 memset(&ev, 0, sizeof(ev));
 218                 ev.mmap.header.misc = misc;
 219                 ev.mmap.header.type = PERF_RECORD_MMAP;
 220                 ev.mmap.header.size = (sizeof(ev.mmap) -
 221                                         (sizeof(ev.mmap.filename) - size));
 222                 ev.mmap.start = pos->start;
 223                 ev.mmap.len   = pos->end - pos->start;
 224                 ev.mmap.pid   = machine->pid;
 225
 226                 memcpy(ev.mmap.filename, pos->dso->long_name,
 227                        pos->dso->long_name_len + 1);
 228                 process(&ev, session);
 229         }
 230
 231         return 0;
 232 }
 233
 234 int event__synthesize_thread(pid_t pid, event__handler_t process,
 235                              struct perf_session *session)
 236 {
 237         pid_t tgid = event__synthesize_comm(pid, 1, process, session);
 238         if (tgid == -1)
 239                 return -1;
 240         return event__synthesize_mmap_events(pid, tgid, process, session);
 241 }
 242
 243 void event__synthesize_threads(event__handler_t process,
 244                                struct perf_session *session)
 245 {
 246         DIR *proc;
 247         struct dirent dirent, *next;
 248
 249         proc = opendir("/proc");
 250
 251         while (!readdir_r(proc, &dirent, &next) && next) {
 252                 char *end;
 253                 pid_t pid = strtol(dirent.d_name, &end, 10);
 254
 255                 if (*end) /* only interested in proper numerical dirents */
 256                         continue;
 257
 258                 event__synthesize_thread(pid, process, session);
 259         }
 260
 261         closedir(proc);
 262 }
 263
 264 struct process_symbol_args {
 265         const char *name;
 266         u64        start;
 267 };
 268
 269 static int find_symbol_cb(void *arg, const char *name, char type, u64 start)
 270 {
 271         struct process_symbol_args *args = arg;
 272
 273         /*
 274          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 275          * an 'A' to the same address as "_stext".
 276          */
 277         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 278               type == 'A') || strcmp(name, args->name))
 279                 return 0;
 280
 281         args->start = start;
 282         return 1;
 283 }
 284
 285 int event__synthesize_kernel_mmap(event__handler_t process,
 286                                   struct perf_session *session,
 287                                   struct machine *machine,
 288                                   const char *symbol_name)
 289 {
 290         size_t size;
 291         const char *filename, *mmap_name;
 292         char path[PATH_MAX];
 293         char name_buff[PATH_MAX];
 294         struct map *map;
 295
 296         event_t ev = {
 297                 .header = {
 298                         .type = PERF_RECORD_MMAP,
 299                 },
 300         };
 301         /*
 302          * We should get this from /sys/kernel/sections/.text, but till that is
 303          * available use this, and after it is use this as a fallback for older
 304          * kernels.
 305          */
 306         struct process_symbol_args args = { .name = symbol_name, };
 307
 308         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 309         if (machine__is_host(machine)) {
 310                 /*
 311                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 312                  * see kernel/perf_event.c __perf_event_mmap
 313                  */
 314                 ev.header.misc = PERF_RECORD_MISC_KERNEL;
 315                 filename = "/proc/kallsyms";
 316         } else {
 317                 ev.header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 318                 if (machine__is_default_guest(machine))
 319                         filename = (char *) symbol_conf.default_guest_kallsyms;
 320                 else {
 321                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 322                         filename = path;
 323                 }
 324         }
 325
 326         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
 327                 return -ENOENT;
 328
 329         map = machine->vmlinux_maps[MAP__FUNCTION];
 330         size = snprintf(ev.mmap.filename, sizeof(ev.mmap.filename),
 331                         "%s%s", mmap_name, symbol_name) + 1;
 332         size = ALIGN(size, sizeof(u64));
 333         ev.mmap.header.size = (sizeof(ev.mmap) -
 334                         (sizeof(ev.mmap.filename) - size));
 335         ev.mmap.pgoff = args.start;
 336         ev.mmap.start = map->start;
 337         ev.mmap.len   = map->end - ev.mmap.start;
 338         ev.mmap.pid   = machine->pid;
 339
 340         return process(&ev, session);
 341 }
 342
 343 static void thread__comm_adjust(struct thread *self)
 344 {
 345         char *comm = self->comm;
 346
 347         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 348             (!symbol_conf.comm_list ||
 349              strlist__has_entry(symbol_conf.comm_list, comm))) {
 350                 unsigned int slen = strlen(comm);
 351
 352                 if (slen > comms__col_width) {
 353                         comms__col_width = slen;
 354                         threads__col_width = slen + 6;
 355                 }
 356         }
 357 }
 358
 359 static int thread__set_comm_adjust(struct thread *self, const char *comm)
 360 {
 361         int ret = thread__set_comm(self, comm);
 362
 363         if (ret)
 364                 return ret;
 365
 366         thread__comm_adjust(self);
 367
 368         return 0;
 369 }
 370
 371 int event__process_comm(event_t *self, struct perf_session *session)
 372 {
 373         struct thread *thread = perf_session__findnew(session, self->comm.pid);
 374
 375         dump_printf(": %s:%d\n", self->comm.comm, self->comm.pid);
 376
 377         if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm)) {
 378                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 379                 return -1;
 380         }
 381
 382         return 0;
 383 }
 384
 385 int event__process_lost(event_t *self, struct perf_session *session)
 386 {
 387         dump_printf(": id:%Ld: lost:%Ld\n", self->lost.id, self->lost.lost);
 388         session->hists.stats.lost += self->lost.lost;
 389         return 0;
 390 }
 391
 392 static void event_set_kernel_mmap_len(struct map **maps, event_t *self)
 393 {
 394         maps[MAP__FUNCTION]->start = self->mmap.start;
 395         maps[MAP__FUNCTION]->end   = self->mmap.start + self->mmap.len;
 396         /*
 397          * Be a bit paranoid here, some perf.data file came with
 398          * a zero sized synthesized MMAP event for the kernel.
 399          */
 400         if (maps[MAP__FUNCTION]->end == 0)
 401                 maps[MAP__FUNCTION]->end = ~0UL;
 402 }
 403
 404 static int event__process_kernel_mmap(event_t *self,
 405                         struct perf_session *session)
 406 {
 407         struct map *map;
 408         char kmmap_prefix[PATH_MAX];
 409         struct machine *machine;
 410         enum dso_kernel_type kernel_type;
 411         bool is_kernel_mmap;
 412
 413         machine = perf_session__findnew_machine(session, self->mmap.pid);
 414         if (!machine) {
 415                 pr_err("Can't find id %d's machine\n", self->mmap.pid);
 416                 goto out_problem;
 417         }
 418
 419         machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
 420         if (machine__is_host(machine))
 421                 kernel_type = DSO_TYPE_KERNEL;
 422         else
 423                 kernel_type = DSO_TYPE_GUEST_KERNEL;
 424
 425         is_kernel_mmap = memcmp(self->mmap.filename,
 426                                 kmmap_prefix,
 427                                 strlen(kmmap_prefix)) == 0;
 428         if (self->mmap.filename[0] == '/' ||
 429             (!is_kernel_mmap && self->mmap.filename[0] == '[')) {
 430
 431                 char short_module_name[1024];
 432                 char *name, *dot;
 433
 434                 if (self->mmap.filename[0] == '/') {
 435                         name = strrchr(self->mmap.filename, '/');
 436                         if (name == NULL)
 437                                 goto out_problem;
 438
 439                         ++name; /* skip / */
 440                         dot = strrchr(name, '.');
 441                         if (dot == NULL)
 442                                 goto out_problem;
 443                         snprintf(short_module_name, sizeof(short_module_name),
 444                                         "[%.*s]", (int)(dot - name), name);
 445                         strxfrchar(short_module_name, '-', '_');
 446                 } else
 447                         strcpy(short_module_name, self->mmap.filename);
 448
 449                 map = machine__new_module(machine, self->mmap.start,
 450                                           self->mmap.filename);
 451                 if (map == NULL)
 452                         goto out_problem;
 453
 454                 name = strdup(short_module_name);
 455                 if (name == NULL)
 456                         goto out_problem;
 457
 458                 map->dso->short_name = name;
 459                 map->end = map->start + self->mmap.len;
 460         } else if (is_kernel_mmap) {
 461                 const char *symbol_name = (self->mmap.filename +
 462                                 strlen(kmmap_prefix));
 463                 /*
 464                  * Should be there already, from the build-id table in
 465                  * the header.
 466                  */
 467                 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
 468                                                      kmmap_prefix);
 469                 if (kernel == NULL)
 470                         goto out_problem;
 471
 472                 kernel->kernel = kernel_type;
 473                 if (__machine__create_kernel_maps(machine, kernel) < 0)
 474                         goto out_problem;
 475
 476                 event_set_kernel_mmap_len(machine->vmlinux_maps, self);
 477                 perf_session__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
 478                                                          symbol_name,
 479                                                          self->mmap.pgoff);
 480                 if (machine__is_default_guest(machine)) {
 481                         /*
 482                          * preload dso of guest kernel and modules
 483                          */
 484                         dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
 485                                   NULL);
 486                 }
 487         }
 488         return 0;
 489 out_problem:
 490         return -1;
 491 }
 492
 493 int event__process_mmap(event_t *self, struct perf_session *session)
 494 {
 495         struct machine *machine;
 496         struct thread *thread;
 497         struct map *map;
 498         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 499         int ret = 0;
 500
 501         dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
 502                         self->mmap.pid, self->mmap.tid, self->mmap.start,
 503                         self->mmap.len, self->mmap.pgoff, self->mmap.filename);
 504
 505         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 506             cpumode == PERF_RECORD_MISC_KERNEL) {
 507                 ret = event__process_kernel_mmap(self, session);
 508                 if (ret < 0)
 509                         goto out_problem;
 510                 return 0;
 511         }
 512
 513         machine = perf_session__find_host_machine(session);
 514         if (machine == NULL)
 515                 goto out_problem;
 516         thread = perf_session__findnew(session, self->mmap.pid);
 517         map = map__new(&machine->user_dsos, self->mmap.start,
 518                         self->mmap.len, self->mmap.pgoff,
 519                         self->mmap.pid, self->mmap.filename,
 520                         MAP__FUNCTION, session->cwd, session->cwdlen);
 521
 522         if (thread == NULL || map == NULL)
 523                 goto out_problem;
 524
 525         thread__insert_map(thread, map);
 526         return 0;
 527
 528 out_problem:
 529         dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 530         return 0;
 531 }
 532
 533 int event__process_task(event_t *self, struct perf_session *session)
 534 {
 535         struct thread *thread = perf_session__findnew(session, self->fork.pid);
 536         struct thread *parent = perf_session__findnew(session, self->fork.ppid);
 537
 538         dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
 539                     self->fork.ppid, self->fork.ptid);
 540         /*
 541          * A thread clone will have the same PID for both parent and child.
 542          */
 543         if (thread == parent)
 544                 return 0;
 545
 546         if (self->header.type == PERF_RECORD_EXIT)
 547                 return 0;
 548
 549         if (thread == NULL || parent == NULL ||
 550             thread__fork(thread, parent) < 0) {
 551                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 552                 return -1;
 553         }
 554
 555         return 0;
 556 }
 557
 558 void thread__find_addr_map(struct thread *self,
 559                            struct perf_session *session, u8 cpumode,
 560                            enum map_type type, pid_t pid, u64 addr,
 561                            struct addr_location *al)
 562 {
 563         struct map_groups *mg = &self->mg;
 564         struct machine *machine = NULL;
 565
 566         al->thread = self;
 567         al->addr = addr;
 568         al->cpumode = cpumode;
 569         al->filtered = false;
 570
 571         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 572                 al->level = 'k';
 573                 machine = perf_session__find_host_machine(session);
 574                 if (machine == NULL) {
 575                         al->map = NULL;
 576                         return;
 577                 }
 578                 mg = &machine->kmaps;
 579         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 580                 al->level = '.';
 581                 machine = perf_session__find_host_machine(session);
 582         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 583                 al->level = 'g';
 584                 machine = perf_session__find_machine(session, pid);
 585                 if (machine == NULL) {
 586                         al->map = NULL;
 587                         return;
 588                 }
 589                 mg = &machine->kmaps;
 590         } else {
 591                 /*
 592                  * 'u' means guest os user space.
 593                  * TODO: We don't support guest user space. Might support late.
 594                  */
 595                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 596                         al->level = 'u';
 597                 else
 598                         al->level = 'H';
 599                 al->map = NULL;
 600
 601                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 602                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 603                         !perf_guest)
 604                         al->filtered = true;
 605                 if ((cpumode == PERF_RECORD_MISC_USER ||
 606                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 607                         !perf_host)
 608                         al->filtered = true;
 609
 610                 return;
 611         }
 612 try_again:
 613         al->map = map_groups__find(mg, type, al->addr);
 614         if (al->map == NULL) {
 615                 /*
 616                  * If this is outside of all known maps, and is a negative
 617                  * address, try to look it up in the kernel dso, as it might be
 618                  * a vsyscall or vdso (which executes in user-mode).
 619                  *
 620                  * XXX This is nasty, we should have a symbol list in the
 621                  * "[vdso]" dso, but for now lets use the old trick of looking
 622                  * in the whole kernel symbol list.
 623                  */
 624                 if ((long long)al->addr < 0 &&
 625                     cpumode == PERF_RECORD_MISC_KERNEL &&
 626                     machine && mg != &machine->kmaps) {
 627                         mg = &machine->kmaps;
 628                         goto try_again;
 629                 }
 630         } else
 631                 al->addr = al->map->map_ip(al->map, al->addr);
 632 }
 633
 634 void thread__find_addr_location(struct thread *self,
 635                                 struct perf_session *session, u8 cpumode,
 636                                 enum map_type type, pid_t pid, u64 addr,
 637                                 struct addr_location *al,
 638                                 symbol_filter_t filter)
 639 {
 640         thread__find_addr_map(self, session, cpumode, type, pid, addr, al);
 641         if (al->map != NULL)
 642                 al->sym = map__find_symbol(al->map, al->addr, filter);
 643         else
 644                 al->sym = NULL;
 645 }
 646
 647 static void dso__calc_col_width(struct dso *self)
 648 {
 649         if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 650             (!symbol_conf.dso_list ||
 651              strlist__has_entry(symbol_conf.dso_list, self->name))) {
 652                 u16 slen = self->short_name_len;
 653                 if (verbose)
 654                         slen = self->long_name_len;
 655                 if (dsos__col_width < slen)
 656                         dsos__col_width = slen;
 657         }
 658
 659         self->slen_calculated = 1;
 660 }
 661
 662 int event__preprocess_sample(const event_t *self, struct perf_session *session,
 663                              struct addr_location *al, symbol_filter_t filter)
 664 {
 665         u8 cpumode = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 666         struct thread *thread = perf_session__findnew(session, self->ip.pid);
 667
 668         if (thread == NULL)
 669                 return -1;
 670
 671         if (symbol_conf.comm_list &&
 672             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 673                 goto out_filtered;
 674
 675         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 676         /*
 677          * Have we already created the kernel maps for the host machine?
 678          *
 679          * This should have happened earlier, when we processed the kernel MMAP
 680          * events, but for older perf.data files there was no such thing, so do
 681          * it now.
 682          */
 683         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 684             session->host_machine.vmlinux_maps[MAP__FUNCTION] == NULL)
 685                 machine__create_kernel_maps(&session->host_machine);
 686
 687         thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 688                               self->ip.pid, self->ip.ip, al);
 689         dump_printf(" ...... dso: %s\n",
 690                     al->map ? al->map->dso->long_name :
 691                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 692         al->sym = NULL;
 693
 694         if (al->map) {
 695                 if (symbol_conf.dso_list &&
 696                     (!al->map || !al->map->dso ||
 697                      !(strlist__has_entry(symbol_conf.dso_list,
 698                                           al->map->dso->short_name) ||
 699                        (al->map->dso->short_name != al->map->dso->long_name &&
 700                         strlist__has_entry(symbol_conf.dso_list,
 701                                            al->map->dso->long_name)))))
 702                         goto out_filtered;
 703                 /*
 704                  * We have to do this here as we may have a dso with no symbol
 705                  * hit that has a name longer than the ones with symbols
 706                  * sampled.
 707                  */
 708                 if (!sort_dso.elide && !al->map->dso->slen_calculated)
 709                         dso__calc_col_width(al->map->dso);
 710
 711                 al->sym = map__find_symbol(al->map, al->addr, filter);
 712         } else {
 713                 const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
 714
 715                 if (dsos__col_width < unresolved_col_width &&
 716                     !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
 717                     !symbol_conf.dso_list)
 718                         dsos__col_width = unresolved_col_width;
 719         }
 720
 721         if (symbol_conf.sym_list && al->sym &&
 722             !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
 723                 goto out_filtered;
 724
 725         return 0;
 726
 727 out_filtered:
 728         al->filtered = true;
 729         return 0;
 730 }
 731
 732 int event__parse_sample(event_t *event, u64 type, struct sample_data *data)
 733 {
 734         u64 *array = event->sample.array;
 735
 736         if (type & PERF_SAMPLE_IP) {
 737                 data->ip = event->ip.ip;
 738                 array++;
 739         }
 740
 741         if (type & PERF_SAMPLE_TID) {
 742                 u32 *p = (u32 *)array;
 743                 data->pid = p[0];
 744                 data->tid = p[1];
 745                 array++;
 746         }
 747
 748         if (type & PERF_SAMPLE_TIME) {
 749                 data->time = *array;
 750                 array++;
 751         }
 752
 753         if (type & PERF_SAMPLE_ADDR) {
 754                 data->addr = *array;
 755                 array++;
 756         }
 757
 758         data->id = -1ULL;
 759         if (type & PERF_SAMPLE_ID) {
 760                 data->id = *array;
 761                 array++;
 762         }
 763
 764         if (type & PERF_SAMPLE_STREAM_ID) {
 765                 data->stream_id = *array;
 766                 array++;
 767         }
 768
 769         if (type & PERF_SAMPLE_CPU) {
 770                 u32 *p = (u32 *)array;
 771                 data->cpu = *p;
 772                 array++;
 773         }
 774
 775         if (type & PERF_SAMPLE_PERIOD) {
 776                 data->period = *array;
 777                 array++;
 778         }
 779
 780         if (type & PERF_SAMPLE_READ) {
 781                 pr_debug("PERF_SAMPLE_READ is unsuported for now\n");
 782                 return -1;
 783         }
 784
 785         if (type & PERF_SAMPLE_CALLCHAIN) {
 786                 data->callchain = (struct ip_callchain *)array;
 787                 array += 1 + data->callchain->nr;
 788         }
 789
 790         if (type & PERF_SAMPLE_RAW) {
 791                 u32 *p = (u32 *)array;
 792                 data->raw_size = *p;
 793                 p++;
 794                 data->raw_data = p;
 795         }
 796
 797         return 0;
 798 }