tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include "event.h"
   3 #include "debug.h"
   4 #include "machine.h"
   5 #include "sort.h"
   6 #include "string.h"
   7 #include "strlist.h"
   8 #include "thread.h"
   9 #include "thread_map.h"
  10
  11 static const char *perf_event__names[] = {
  12         [0]                                     = "TOTAL",
  13         [PERF_RECORD_MMAP]                      = "MMAP",
  14         [PERF_RECORD_LOST]                      = "LOST",
  15         [PERF_RECORD_COMM]                      = "COMM",
  16         [PERF_RECORD_EXIT]                      = "EXIT",
  17         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  18         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  19         [PERF_RECORD_FORK]                      = "FORK",
  20         [PERF_RECORD_READ]                      = "READ",
  21         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  22         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  23         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  24         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  25         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  26         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  27 };
  28
  29 const char *perf_event__name(unsigned int id)
  30 {
  31         if (id >= ARRAY_SIZE(perf_event__names))
  32                 return "INVALID";
  33         if (!perf_event__names[id])
  34                 return "UNKNOWN";
  35         return perf_event__names[id];
  36 }
  37
  38 static struct perf_sample synth_sample = {
  39         .pid       = -1,
  40         .tid       = -1,
  41         .time      = -1,
  42         .stream_id = -1,
  43         .cpu       = -1,
  44         .period    = 1,
  45 };
  46
  47 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
  48 {
  49         char filename[PATH_MAX];
  50         char bf[BUFSIZ];
  51         FILE *fp;
  52         size_t size = 0;
  53         pid_t tgid = -1;
  54
  55         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  56
  57         fp = fopen(filename, "r");
  58         if (fp == NULL) {
  59                 pr_debug("couldn't open %s\n", filename);
  60                 return 0;
  61         }
  62
  63         while (!comm[0] || (tgid < 0)) {
  64                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  65                         pr_warning("couldn't get COMM and pgid, malformed %s\n",
  66                                    filename);
  67                         break;
  68                 }
  69
  70                 if (memcmp(bf, "Name:", 5) == 0) {
  71                         char *name = bf + 5;
  72                         while (*name && isspace(*name))
  73                                 ++name;
  74                         size = strlen(name) - 1;
  75                         if (size >= len)
  76                                 size = len - 1;
  77                         memcpy(comm, name, size);
  78                         comm[size] = '\0';
  79
  80                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  81                         char *tgids = bf + 5;
  82                         while (*tgids && isspace(*tgids))
  83                                 ++tgids;
  84                         tgid = atoi(tgids);
  85                 }
  86         }
  87
  88         fclose(fp);
  89
  90         return tgid;
  91 }
  92
  93 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
  94                                          union perf_event *event, pid_t pid,
  95                                          int full,
  96                                          perf_event__handler_t process,
  97                                          struct machine *machine)
  98 {
  99         char filename[PATH_MAX];
 100         size_t size;
 101         DIR *tasks;
 102         struct dirent dirent, *next;
 103         pid_t tgid;
 104
 105         memset(&event->comm, 0, sizeof(event->comm));
 106
 107         tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
 108                                          sizeof(event->comm.comm));
 109         if (tgid < 0)
 110                 goto out;
 111
 112         event->comm.pid = tgid;
 113         event->comm.header.type = PERF_RECORD_COMM;
 114
 115         size = strlen(event->comm.comm) + 1;
 116         size = PERF_ALIGN(size, sizeof(u64));
 117         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 118         event->comm.header.size = (sizeof(event->comm) -
 119                                 (sizeof(event->comm.comm) - size) +
 120                                 machine->id_hdr_size);
 121         if (!full) {
 122                 event->comm.tid = pid;
 123
 124                 if (process(tool, event, &synth_sample, machine) != 0)
 125                         return -1;
 126
 127                 goto out;
 128         }
 129
 130         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
 131
 132         tasks = opendir(filename);
 133         if (tasks == NULL) {
 134                 pr_debug("couldn't open %s\n", filename);
 135                 return 0;
 136         }
 137
 138         while (!readdir_r(tasks, &dirent, &next) && next) {
 139                 char *end;
 140                 pid = strtol(dirent.d_name, &end, 10);
 141                 if (*end)
 142                         continue;
 143
 144                 /* already have tgid; jut want to update the comm */
 145                 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
 146                                          sizeof(event->comm.comm));
 147
 148                 size = strlen(event->comm.comm) + 1;
 149                 size = PERF_ALIGN(size, sizeof(u64));
 150                 memset(event->comm.comm + size, 0, machine->id_hdr_size);
 151                 event->comm.header.size = (sizeof(event->comm) -
 152                                           (sizeof(event->comm.comm) - size) +
 153                                           machine->id_hdr_size);
 154
 155                 event->comm.tid = pid;
 156
 157                 if (process(tool, event, &synth_sample, machine) != 0) {
 158                         tgid = -1;
 159                         break;
 160                 }
 161         }
 162
 163         closedir(tasks);
 164 out:
 165         return tgid;
 166 }
 167
 168 static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 169                                               union perf_event *event,
 170                                               pid_t pid, pid_t tgid,
 171                                               perf_event__handler_t process,
 172                                               struct machine *machine)
 173 {
 174         char filename[PATH_MAX];
 175         FILE *fp;
 176         int rc = 0;
 177
 178         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 179
 180         fp = fopen(filename, "r");
 181         if (fp == NULL) {
 182                 /*
 183                  * We raced with a task exiting - just return:
 184                  */
 185                 pr_debug("couldn't open %s\n", filename);
 186                 return -1;
 187         }
 188
 189         event->header.type = PERF_RECORD_MMAP;
 190         /*
 191          * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 192          */
 193         event->header.misc = PERF_RECORD_MISC_USER;
 194
 195         while (1) {
 196                 char bf[BUFSIZ];
 197                 char prot[5];
 198                 char execname[PATH_MAX];
 199                 char anonstr[] = "//anon";
 200                 size_t size;
 201
 202                 if (fgets(bf, sizeof(bf), fp) == NULL)
 203                         break;
 204
 205                 /* ensure null termination since stack will be reused. */
 206                 strcpy(execname, "");
 207
 208                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 209                 sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
 210                        &event->mmap.start, &event->mmap.len, prot,
 211                        &event->mmap.pgoff, execname);
 212
 213                 if (prot[2] != 'x')
 214                         continue;
 215
 216                 if (!strcmp(execname, ""))
 217                         strcpy(execname, anonstr);
 218
 219                 size = strlen(execname) + 1;
 220                 memcpy(event->mmap.filename, execname, size);
 221                 size = PERF_ALIGN(size, sizeof(u64));
 222                 event->mmap.len -= event->mmap.start;
 223                 event->mmap.header.size = (sizeof(event->mmap) -
 224                                            (sizeof(event->mmap.filename) - size));
 225                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 226                 event->mmap.header.size += machine->id_hdr_size;
 227                 event->mmap.pid = tgid;
 228                 event->mmap.tid = pid;
 229
 230                 if (process(tool, event, &synth_sample, machine) != 0) {
 231                         rc = -1;
 232                         break;
 233                 }
 234         }
 235
 236         fclose(fp);
 237         return rc;
 238 }
 239
 240 int perf_event__synthesize_modules(struct perf_tool *tool,
 241                                    perf_event__handler_t process,
 242                                    struct machine *machine)
 243 {
 244         int rc = 0;
 245         struct rb_node *nd;
 246         struct map_groups *kmaps = &machine->kmaps;
 247         union perf_event *event = zalloc((sizeof(event->mmap) +
 248                                           machine->id_hdr_size));
 249         if (event == NULL) {
 250                 pr_debug("Not enough memory synthesizing mmap event "
 251                          "for kernel modules\n");
 252                 return -1;
 253         }
 254
 255         event->header.type = PERF_RECORD_MMAP;
 256
 257         /*
 258          * kernel uses 0 for user space maps, see kernel/perf_event.c
 259          * __perf_event_mmap
 260          */
 261         if (machine__is_host(machine))
 262                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 263         else
 264                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 265
 266         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 267              nd; nd = rb_next(nd)) {
 268                 size_t size;
 269                 struct map *pos = rb_entry(nd, struct map, rb_node);
 270
 271                 if (pos->dso->kernel)
 272                         continue;
 273
 274                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 275                 event->mmap.header.type = PERF_RECORD_MMAP;
 276                 event->mmap.header.size = (sizeof(event->mmap) -
 277                                         (sizeof(event->mmap.filename) - size));
 278                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 279                 event->mmap.header.size += machine->id_hdr_size;
 280                 event->mmap.start = pos->start;
 281                 event->mmap.len   = pos->end - pos->start;
 282                 event->mmap.pid   = machine->pid;
 283
 284                 memcpy(event->mmap.filename, pos->dso->long_name,
 285                        pos->dso->long_name_len + 1);
 286                 if (process(tool, event, &synth_sample, machine) != 0) {
 287                         rc = -1;
 288                         break;
 289                 }
 290         }
 291
 292         free(event);
 293         return rc;
 294 }
 295
 296 static int __event__synthesize_thread(union perf_event *comm_event,
 297                                       union perf_event *mmap_event,
 298                                       pid_t pid, int full,
 299                                           perf_event__handler_t process,
 300                                       struct perf_tool *tool,
 301                                       struct machine *machine)
 302 {
 303         pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
 304                                                  process, machine);
 305         if (tgid == -1)
 306                 return -1;
 307         return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 308                                                   process, machine);
 309 }
 310
 311 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 312                                       struct thread_map *threads,
 313                                       perf_event__handler_t process,
 314                                       struct machine *machine)
 315 {
 316         union perf_event *comm_event, *mmap_event;
 317         int err = -1, thread, j;
 318
 319         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 320         if (comm_event == NULL)
 321                 goto out;
 322
 323         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 324         if (mmap_event == NULL)
 325                 goto out_free_comm;
 326
 327         err = 0;
 328         for (thread = 0; thread < threads->nr; ++thread) {
 329                 if (__event__synthesize_thread(comm_event, mmap_event,
 330                                                threads->map[thread], 0,
 331                                                process, tool, machine)) {
 332                         err = -1;
 333                         break;
 334                 }
 335
 336                 /*
 337                  * comm.pid is set to thread group id by
 338                  * perf_event__synthesize_comm
 339                  */
 340                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 341                         bool need_leader = true;
 342
 343                         /* is thread group leader in thread_map? */
 344                         for (j = 0; j < threads->nr; ++j) {
 345                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 346                                         need_leader = false;
 347                                         break;
 348                                 }
 349                         }
 350
 351                         /* if not, generate events for it */
 352                         if (need_leader &&
 353                             __event__synthesize_thread(comm_event,
 354                                                       mmap_event,
 355                                                       comm_event->comm.pid, 0,
 356                                                       process, tool, machine)) {
 357                                 err = -1;
 358                                 break;
 359                         }
 360                 }
 361         }
 362         free(mmap_event);
 363 out_free_comm:
 364         free(comm_event);
 365 out:
 366         return err;
 367 }
 368
 369 int perf_event__synthesize_threads(struct perf_tool *tool,
 370                                    perf_event__handler_t process,
 371                                    struct machine *machine)
 372 {
 373         DIR *proc;
 374         struct dirent dirent, *next;
 375         union perf_event *comm_event, *mmap_event;
 376         int err = -1;
 377
 378         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 379         if (comm_event == NULL)
 380                 goto out;
 381
 382         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 383         if (mmap_event == NULL)
 384                 goto out_free_comm;
 385
 386         proc = opendir("/proc");
 387         if (proc == NULL)
 388                 goto out_free_mmap;
 389
 390         while (!readdir_r(proc, &dirent, &next) && next) {
 391                 char *end;
 392                 pid_t pid = strtol(dirent.d_name, &end, 10);
 393
 394                 if (*end) /* only interested in proper numerical dirents */
 395                         continue;
 396                 /*
 397                  * We may race with exiting thread, so don't stop just because
 398                  * one thread couldn't be synthesized.
 399                  */
 400                 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
 401                                            process, tool, machine);
 402         }
 403
 404         err = 0;
 405         closedir(proc);
 406 out_free_mmap:
 407         free(mmap_event);
 408 out_free_comm:
 409         free(comm_event);
 410 out:
 411         return err;
 412 }
 413
 414 struct process_symbol_args {
 415         const char *name;
 416         u64        start;
 417 };
 418
 419 static int find_symbol_cb(void *arg, const char *name, char type,
 420                           u64 start)
 421 {
 422         struct process_symbol_args *args = arg;
 423
 424         /*
 425          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 426          * an 'A' to the same address as "_stext".
 427          */
 428         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 429               type == 'A') || strcmp(name, args->name))
 430                 return 0;
 431
 432         args->start = start;
 433         return 1;
 434 }
 435
 436 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 437                                        perf_event__handler_t process,
 438                                        struct machine *machine,
 439                                        const char *symbol_name)
 440 {
 441         size_t size;
 442         const char *filename, *mmap_name;
 443         char path[PATH_MAX];
 444         char name_buff[PATH_MAX];
 445         struct map *map;
 446         int err;
 447         /*
 448          * We should get this from /sys/kernel/sections/.text, but till that is
 449          * available use this, and after it is use this as a fallback for older
 450          * kernels.
 451          */
 452         struct process_symbol_args args = { .name = symbol_name, };
 453         union perf_event *event = zalloc((sizeof(event->mmap) +
 454                                           machine->id_hdr_size));
 455         if (event == NULL) {
 456                 pr_debug("Not enough memory synthesizing mmap event "
 457                          "for kernel modules\n");
 458                 return -1;
 459         }
 460
 461         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 462         if (machine__is_host(machine)) {
 463                 /*
 464                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 465                  * see kernel/perf_event.c __perf_event_mmap
 466                  */
 467                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 468                 filename = "/proc/kallsyms";
 469         } else {
 470                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 471                 if (machine__is_default_guest(machine))
 472                         filename = (char *) symbol_conf.default_guest_kallsyms;
 473                 else {
 474                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 475                         filename = path;
 476                 }
 477         }
 478
 479         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) {
 480                 free(event);
 481                 return -ENOENT;
 482         }
 483
 484         map = machine->vmlinux_maps[MAP__FUNCTION];
 485         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 486                         "%s%s", mmap_name, symbol_name) + 1;
 487         size = PERF_ALIGN(size, sizeof(u64));
 488         event->mmap.header.type = PERF_RECORD_MMAP;
 489         event->mmap.header.size = (sizeof(event->mmap) -
 490                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 491         event->mmap.pgoff = args.start;
 492         event->mmap.start = map->start;
 493         event->mmap.len   = map->end - event->mmap.start;
 494         event->mmap.pid   = machine->pid;
 495
 496         err = process(tool, event, &synth_sample, machine);
 497         free(event);
 498
 499         return err;
 500 }
 501
 502 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 503 {
 504         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 505 }
 506
 507 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 508                              union perf_event *event,
 509                              struct perf_sample *sample __maybe_unused,
 510                              struct machine *machine)
 511 {
 512         return machine__process_comm_event(machine, event);
 513 }
 514
 515 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 516                              union perf_event *event,
 517                              struct perf_sample *sample __maybe_unused,
 518                              struct machine *machine)
 519 {
 520         return machine__process_lost_event(machine, event);
 521 }
 522
 523 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 524 {
 525         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
 526                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 527                        event->mmap.len, event->mmap.pgoff, event->mmap.filename);
 528 }
 529
 530 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 531                              union perf_event *event,
 532                              struct perf_sample *sample __maybe_unused,
 533                              struct machine *machine)
 534 {
 535         return machine__process_mmap_event(machine, event);
 536 }
 537
 538 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 539 {
 540         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 541                        event->fork.pid, event->fork.tid,
 542                        event->fork.ppid, event->fork.ptid);
 543 }
 544
 545 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 546                              union perf_event *event,
 547                              struct perf_sample *sample __maybe_unused,
 548                              struct machine *machine)
 549 {
 550         return machine__process_fork_event(machine, event);
 551 }
 552
 553 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 554                              union perf_event *event,
 555                              struct perf_sample *sample __maybe_unused,
 556                              struct machine *machine)
 557 {
 558         return machine__process_exit_event(machine, event);
 559 }
 560
 561 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 562 {
 563         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 564                              perf_event__name(event->header.type));
 565
 566         switch (event->header.type) {
 567         case PERF_RECORD_COMM:
 568                 ret += perf_event__fprintf_comm(event, fp);
 569                 break;
 570         case PERF_RECORD_FORK:
 571         case PERF_RECORD_EXIT:
 572                 ret += perf_event__fprintf_task(event, fp);
 573                 break;
 574         case PERF_RECORD_MMAP:
 575                 ret += perf_event__fprintf_mmap(event, fp);
 576                 break;
 577         default:
 578                 ret += fprintf(fp, "\n");
 579         }
 580
 581         return ret;
 582 }
 583
 584 int perf_event__process(struct perf_tool *tool __maybe_unused,
 585                         union perf_event *event,
 586                         struct perf_sample *sample __maybe_unused,
 587                         struct machine *machine)
 588 {
 589         return machine__process_event(machine, event);
 590 }
 591
 592 void thread__find_addr_map(struct thread *self,
 593                            struct machine *machine, u8 cpumode,
 594                            enum map_type type, u64 addr,
 595                            struct addr_location *al)
 596 {
 597         struct map_groups *mg = &self->mg;
 598         bool load_map = false;
 599
 600         al->thread = self;
 601         al->addr = addr;
 602         al->cpumode = cpumode;
 603         al->filtered = false;
 604
 605         if (machine == NULL) {
 606                 al->map = NULL;
 607                 return;
 608         }
 609
 610         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 611                 al->level = 'k';
 612                 mg = &machine->kmaps;
 613                 load_map = true;
 614         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 615                 al->level = '.';
 616         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 617                 al->level = 'g';
 618                 mg = &machine->kmaps;
 619                 load_map = true;
 620         } else {
 621                 /*
 622                  * 'u' means guest os user space.
 623                  * TODO: We don't support guest user space. Might support late.
 624                  */
 625                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 626                         al->level = 'u';
 627                 else
 628                         al->level = 'H';
 629                 al->map = NULL;
 630
 631                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 632                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 633                         !perf_guest)
 634                         al->filtered = true;
 635                 if ((cpumode == PERF_RECORD_MISC_USER ||
 636                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 637                         !perf_host)
 638                         al->filtered = true;
 639
 640                 return;
 641         }
 642 try_again:
 643         al->map = map_groups__find(mg, type, al->addr);
 644         if (al->map == NULL) {
 645                 /*
 646                  * If this is outside of all known maps, and is a negative
 647                  * address, try to look it up in the kernel dso, as it might be
 648                  * a vsyscall or vdso (which executes in user-mode).
 649                  *
 650                  * XXX This is nasty, we should have a symbol list in the
 651                  * "[vdso]" dso, but for now lets use the old trick of looking
 652                  * in the whole kernel symbol list.
 653                  */
 654                 if ((long long)al->addr < 0 &&
 655                     cpumode == PERF_RECORD_MISC_USER &&
 656                     machine && mg != &machine->kmaps) {
 657                         mg = &machine->kmaps;
 658                         goto try_again;
 659                 }
 660         } else {
 661                 /*
 662                  * Kernel maps might be changed when loading symbols so loading
 663                  * must be done prior to using kernel maps.
 664                  */
 665                 if (load_map)
 666                         map__load(al->map, machine->symbol_filter);
 667                 al->addr = al->map->map_ip(al->map, al->addr);
 668         }
 669 }
 670
 671 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 672                                 u8 cpumode, enum map_type type, u64 addr,
 673                                 struct addr_location *al)
 674 {
 675         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 676         if (al->map != NULL)
 677                 al->sym = map__find_symbol(al->map, al->addr,
 678                                            machine->symbol_filter);
 679         else
 680                 al->sym = NULL;
 681 }
 682
 683 int perf_event__preprocess_sample(const union perf_event *event,
 684                                   struct machine *machine,
 685                                   struct addr_location *al,
 686                                   struct perf_sample *sample)
 687 {
 688         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 689         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 690                                                         sample->pid);
 691
 692         if (thread == NULL)
 693                 return -1;
 694
 695         if (symbol_conf.comm_list &&
 696             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 697                 goto out_filtered;
 698
 699         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->tid);
 700         /*
 701          * Have we already created the kernel maps for this machine?
 702          *
 703          * This should have happened earlier, when we processed the kernel MMAP
 704          * events, but for older perf.data files there was no such thing, so do
 705          * it now.
 706          */
 707         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 708             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 709                 machine__create_kernel_maps(machine);
 710
 711         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 712                               sample->ip, al);
 713         dump_printf(" ...... dso: %s\n",
 714                     al->map ? al->map->dso->long_name :
 715                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 716         al->sym = NULL;
 717         al->cpu = sample->cpu;
 718
 719         if (al->map) {
 720                 struct dso *dso = al->map->dso;
 721
 722                 if (symbol_conf.dso_list &&
 723                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 724                                                   dso->short_name) ||
 725                                (dso->short_name != dso->long_name &&
 726                                 strlist__has_entry(symbol_conf.dso_list,
 727                                                    dso->long_name)))))
 728                         goto out_filtered;
 729
 730                 al->sym = map__find_symbol(al->map, al->addr,
 731                                            machine->symbol_filter);
 732         }
 733
 734         if (symbol_conf.sym_list &&
 735                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 736                                                 al->sym->name)))
 737                 goto out_filtered;
 738
 739         return 0;
 740
 741 out_filtered:
 742         al->filtered = true;
 743         return 0;
 744 }