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 #include "symbol/kallsyms.h"
  11
  12 static const char *perf_event__names[] = {
  13         [0]                                     = "TOTAL",
  14         [PERF_RECORD_MMAP]                      = "MMAP",
  15         [PERF_RECORD_MMAP2]                     = "MMAP2",
  16         [PERF_RECORD_LOST]                      = "LOST",
  17         [PERF_RECORD_COMM]                      = "COMM",
  18         [PERF_RECORD_EXIT]                      = "EXIT",
  19         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  20         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  21         [PERF_RECORD_FORK]                      = "FORK",
  22         [PERF_RECORD_READ]                      = "READ",
  23         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  24         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  25         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  26         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  27         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  28         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  29 };
  30
  31 const char *perf_event__name(unsigned int id)
  32 {
  33         if (id >= ARRAY_SIZE(perf_event__names))
  34                 return "INVALID";
  35         if (!perf_event__names[id])
  36                 return "UNKNOWN";
  37         return perf_event__names[id];
  38 }
  39
  40 static struct perf_sample synth_sample = {
  41         .pid       = -1,
  42         .tid       = -1,
  43         .time      = -1,
  44         .stream_id = -1,
  45         .cpu       = -1,
  46         .period    = 1,
  47 };
  48
  49 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
  50 {
  51         char filename[PATH_MAX];
  52         char bf[BUFSIZ];
  53         FILE *fp;
  54         size_t size = 0;
  55         pid_t tgid = -1;
  56
  57         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  58
  59         fp = fopen(filename, "r");
  60         if (fp == NULL) {
  61                 pr_debug("couldn't open %s\n", filename);
  62                 return 0;
  63         }
  64
  65         while (!comm[0] || (tgid < 0)) {
  66                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  67                         pr_warning("couldn't get COMM and pgid, malformed %s\n",
  68                                    filename);
  69                         break;
  70                 }
  71
  72                 if (memcmp(bf, "Name:", 5) == 0) {
  73                         char *name = bf + 5;
  74                         while (*name && isspace(*name))
  75                                 ++name;
  76                         size = strlen(name) - 1;
  77                         if (size >= len)
  78                                 size = len - 1;
  79                         memcpy(comm, name, size);
  80                         comm[size] = '\0';
  81
  82                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  83                         char *tgids = bf + 5;
  84                         while (*tgids && isspace(*tgids))
  85                                 ++tgids;
  86                         tgid = atoi(tgids);
  87                 }
  88         }
  89
  90         fclose(fp);
  91
  92         return tgid;
  93 }
  94
  95 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
  96                                          union perf_event *event, pid_t pid,
  97                                          perf_event__handler_t process,
  98                                          struct machine *machine)
  99 {
 100         size_t size;
 101         pid_t tgid;
 102
 103         memset(&event->comm, 0, sizeof(event->comm));
 104
 105         if (machine__is_host(machine))
 106                 tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
 107                                                  sizeof(event->comm.comm));
 108         else
 109                 tgid = machine->pid;
 110
 111         if (tgid < 0)
 112                 goto out;
 113
 114         event->comm.pid = tgid;
 115         event->comm.header.type = PERF_RECORD_COMM;
 116
 117         size = strlen(event->comm.comm) + 1;
 118         size = PERF_ALIGN(size, sizeof(u64));
 119         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 120         event->comm.header.size = (sizeof(event->comm) -
 121                                 (sizeof(event->comm.comm) - size) +
 122                                 machine->id_hdr_size);
 123         event->comm.tid = pid;
 124
 125         if (process(tool, event, &synth_sample, machine) != 0)
 126                 return -1;
 127
 128 out:
 129         return tgid;
 130 }
 131
 132 static int perf_event__synthesize_fork(struct perf_tool *tool,
 133                                        union perf_event *event, pid_t pid,
 134                                        pid_t tgid, perf_event__handler_t process,
 135                                        struct machine *machine)
 136 {
 137         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 138
 139         /* this is really a clone event but we use fork to synthesize it */
 140         event->fork.ppid = tgid;
 141         event->fork.ptid = tgid;
 142         event->fork.pid  = tgid;
 143         event->fork.tid  = pid;
 144         event->fork.header.type = PERF_RECORD_FORK;
 145
 146         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 147
 148         if (process(tool, event, &synth_sample, machine) != 0)
 149                 return -1;
 150
 151         return 0;
 152 }
 153
 154 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 155                                        union perf_event *event,
 156                                        pid_t pid, pid_t tgid,
 157                                        perf_event__handler_t process,
 158                                        struct machine *machine,
 159                                        bool mmap_data)
 160 {
 161         char filename[PATH_MAX];
 162         FILE *fp;
 163         int rc = 0;
 164
 165         if (machine__is_default_guest(machine))
 166                 return 0;
 167
 168         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 169                  machine->root_dir, pid);
 170
 171         fp = fopen(filename, "r");
 172         if (fp == NULL) {
 173                 /*
 174                  * We raced with a task exiting - just return:
 175                  */
 176                 pr_debug("couldn't open %s\n", filename);
 177                 return -1;
 178         }
 179
 180         event->header.type = PERF_RECORD_MMAP;
 181
 182         while (1) {
 183                 char bf[BUFSIZ];
 184                 char prot[5];
 185                 char execname[PATH_MAX];
 186                 char anonstr[] = "//anon";
 187                 size_t size;
 188                 ssize_t n;
 189
 190                 if (fgets(bf, sizeof(bf), fp) == NULL)
 191                         break;
 192
 193                 /* ensure null termination since stack will be reused. */
 194                 strcpy(execname, "");
 195
 196                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 197                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
 198                        &event->mmap.start, &event->mmap.len, prot,
 199                        &event->mmap.pgoff,
 200                        execname);
 201                 /*
 202                  * Anon maps don't have the execname.
 203                  */
 204                 if (n < 4)
 205                         continue;
 206                 /*
 207                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 208                  */
 209                 if (machine__is_host(machine))
 210                         event->header.misc = PERF_RECORD_MISC_USER;
 211                 else
 212                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 213
 214                 if (prot[2] != 'x') {
 215                         if (!mmap_data || prot[0] != 'r')
 216                                 continue;
 217
 218                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 219                 }
 220
 221                 if (!strcmp(execname, ""))
 222                         strcpy(execname, anonstr);
 223
 224                 size = strlen(execname) + 1;
 225                 memcpy(event->mmap.filename, execname, size);
 226                 size = PERF_ALIGN(size, sizeof(u64));
 227                 event->mmap.len -= event->mmap.start;
 228                 event->mmap.header.size = (sizeof(event->mmap) -
 229                                         (sizeof(event->mmap.filename) - size));
 230                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 231                 event->mmap.header.size += machine->id_hdr_size;
 232                 event->mmap.pid = tgid;
 233                 event->mmap.tid = pid;
 234
 235                 if (process(tool, event, &synth_sample, machine) != 0) {
 236                         rc = -1;
 237                         break;
 238                 }
 239         }
 240
 241         fclose(fp);
 242         return rc;
 243 }
 244
 245 int perf_event__synthesize_modules(struct perf_tool *tool,
 246                                    perf_event__handler_t process,
 247                                    struct machine *machine)
 248 {
 249         int rc = 0;
 250         struct rb_node *nd;
 251         struct map_groups *kmaps = &machine->kmaps;
 252         union perf_event *event = zalloc((sizeof(event->mmap) +
 253                                           machine->id_hdr_size));
 254         if (event == NULL) {
 255                 pr_debug("Not enough memory synthesizing mmap event "
 256                          "for kernel modules\n");
 257                 return -1;
 258         }
 259
 260         event->header.type = PERF_RECORD_MMAP;
 261
 262         /*
 263          * kernel uses 0 for user space maps, see kernel/perf_event.c
 264          * __perf_event_mmap
 265          */
 266         if (machine__is_host(machine))
 267                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 268         else
 269                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 270
 271         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 272              nd; nd = rb_next(nd)) {
 273                 size_t size;
 274                 struct map *pos = rb_entry(nd, struct map, rb_node);
 275
 276                 if (pos->dso->kernel)
 277                         continue;
 278
 279                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 280                 event->mmap.header.type = PERF_RECORD_MMAP;
 281                 event->mmap.header.size = (sizeof(event->mmap) -
 282                                         (sizeof(event->mmap.filename) - size));
 283                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 284                 event->mmap.header.size += machine->id_hdr_size;
 285                 event->mmap.start = pos->start;
 286                 event->mmap.len   = pos->end - pos->start;
 287                 event->mmap.pid   = machine->pid;
 288
 289                 memcpy(event->mmap.filename, pos->dso->long_name,
 290                        pos->dso->long_name_len + 1);
 291                 if (process(tool, event, &synth_sample, machine) != 0) {
 292                         rc = -1;
 293                         break;
 294                 }
 295         }
 296
 297         free(event);
 298         return rc;
 299 }
 300
 301 static int __event__synthesize_thread(union perf_event *comm_event,
 302                                       union perf_event *mmap_event,
 303                                       union perf_event *fork_event,
 304                                       pid_t pid, int full,
 305                                           perf_event__handler_t process,
 306                                       struct perf_tool *tool,
 307                                       struct machine *machine, bool mmap_data)
 308 {
 309         char filename[PATH_MAX];
 310         DIR *tasks;
 311         struct dirent dirent, *next;
 312         pid_t tgid;
 313
 314         /* special case: only send one comm event using passed in pid */
 315         if (!full) {
 316                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 317                                                    process, machine);
 318
 319                 if (tgid == -1)
 320                         return -1;
 321
 322                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 323                                                           process, machine, mmap_data);
 324         }
 325
 326         if (machine__is_default_guest(machine))
 327                 return 0;
 328
 329         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 330                  machine->root_dir, pid);
 331
 332         tasks = opendir(filename);
 333         if (tasks == NULL) {
 334                 pr_debug("couldn't open %s\n", filename);
 335                 return 0;
 336         }
 337
 338         while (!readdir_r(tasks, &dirent, &next) && next) {
 339                 char *end;
 340                 int rc = 0;
 341                 pid_t _pid;
 342
 343                 _pid = strtol(dirent.d_name, &end, 10);
 344                 if (*end)
 345                         continue;
 346
 347                 tgid = perf_event__synthesize_comm(tool, comm_event, _pid,
 348                                                    process, machine);
 349                 if (tgid == -1)
 350                         return -1;
 351
 352                 if (_pid == pid) {
 353                         /* process the parent's maps too */
 354                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 355                                                 process, machine, mmap_data);
 356                 } else {
 357                         /* only fork the tid's map, to save time */
 358                         rc = perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 359                                                  process, machine);
 360                 }
 361
 362                 if (rc)
 363                         return rc;
 364         }
 365
 366         closedir(tasks);
 367         return 0;
 368 }
 369
 370 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 371                                       struct thread_map *threads,
 372                                       perf_event__handler_t process,
 373                                       struct machine *machine,
 374                                       bool mmap_data)
 375 {
 376         union perf_event *comm_event, *mmap_event, *fork_event;
 377         int err = -1, thread, j;
 378
 379         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 380         if (comm_event == NULL)
 381                 goto out;
 382
 383         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 384         if (mmap_event == NULL)
 385                 goto out_free_comm;
 386
 387         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 388         if (fork_event == NULL)
 389                 goto out_free_mmap;
 390
 391         err = 0;
 392         for (thread = 0; thread < threads->nr; ++thread) {
 393                 if (__event__synthesize_thread(comm_event, mmap_event,
 394                                                fork_event,
 395                                                threads->map[thread], 0,
 396                                                process, tool, machine,
 397                                                mmap_data)) {
 398                         err = -1;
 399                         break;
 400                 }
 401
 402                 /*
 403                  * comm.pid is set to thread group id by
 404                  * perf_event__synthesize_comm
 405                  */
 406                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 407                         bool need_leader = true;
 408
 409                         /* is thread group leader in thread_map? */
 410                         for (j = 0; j < threads->nr; ++j) {
 411                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 412                                         need_leader = false;
 413                                         break;
 414                                 }
 415                         }
 416
 417                         /* if not, generate events for it */
 418                         if (need_leader &&
 419                             __event__synthesize_thread(comm_event, mmap_event,
 420                                                        fork_event,
 421                                                        comm_event->comm.pid, 0,
 422                                                        process, tool, machine,
 423                                                        mmap_data)) {
 424                                 err = -1;
 425                                 break;
 426                         }
 427                 }
 428         }
 429         free(fork_event);
 430 out_free_mmap:
 431         free(mmap_event);
 432 out_free_comm:
 433         free(comm_event);
 434 out:
 435         return err;
 436 }
 437
 438 int perf_event__synthesize_threads(struct perf_tool *tool,
 439                                    perf_event__handler_t process,
 440                                    struct machine *machine, bool mmap_data)
 441 {
 442         DIR *proc;
 443         char proc_path[PATH_MAX];
 444         struct dirent dirent, *next;
 445         union perf_event *comm_event, *mmap_event, *fork_event;
 446         int err = -1;
 447
 448         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 449         if (comm_event == NULL)
 450                 goto out;
 451
 452         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 453         if (mmap_event == NULL)
 454                 goto out_free_comm;
 455
 456         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 457         if (fork_event == NULL)
 458                 goto out_free_mmap;
 459
 460         if (machine__is_default_guest(machine))
 461                 return 0;
 462
 463         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 464         proc = opendir(proc_path);
 465
 466         if (proc == NULL)
 467                 goto out_free_fork;
 468
 469         while (!readdir_r(proc, &dirent, &next) && next) {
 470                 char *end;
 471                 pid_t pid = strtol(dirent.d_name, &end, 10);
 472
 473                 if (*end) /* only interested in proper numerical dirents */
 474                         continue;
 475                 /*
 476                  * We may race with exiting thread, so don't stop just because
 477                  * one thread couldn't be synthesized.
 478                  */
 479                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 480                                            1, process, tool, machine, mmap_data);
 481         }
 482
 483         err = 0;
 484         closedir(proc);
 485 out_free_fork:
 486         free(fork_event);
 487 out_free_mmap:
 488         free(mmap_event);
 489 out_free_comm:
 490         free(comm_event);
 491 out:
 492         return err;
 493 }
 494
 495 struct process_symbol_args {
 496         const char *name;
 497         u64        start;
 498 };
 499
 500 static int find_symbol_cb(void *arg, const char *name, char type,
 501                           u64 start)
 502 {
 503         struct process_symbol_args *args = arg;
 504
 505         /*
 506          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 507          * an 'A' to the same address as "_stext".
 508          */
 509         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 510               type == 'A') || strcmp(name, args->name))
 511                 return 0;
 512
 513         args->start = start;
 514         return 1;
 515 }
 516
 517 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 518                                  const char *symbol_name)
 519 {
 520         struct process_symbol_args args = { .name = symbol_name, };
 521
 522         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 523                 return 0;
 524
 525         return args.start;
 526 }
 527
 528 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 529                                        perf_event__handler_t process,
 530                                        struct machine *machine)
 531 {
 532         size_t size;
 533         const char *mmap_name;
 534         char name_buff[PATH_MAX];
 535         struct map *map;
 536         struct kmap *kmap;
 537         int err;
 538         /*
 539          * We should get this from /sys/kernel/sections/.text, but till that is
 540          * available use this, and after it is use this as a fallback for older
 541          * kernels.
 542          */
 543         union perf_event *event = zalloc((sizeof(event->mmap) +
 544                                           machine->id_hdr_size));
 545         if (event == NULL) {
 546                 pr_debug("Not enough memory synthesizing mmap event "
 547                          "for kernel modules\n");
 548                 return -1;
 549         }
 550
 551         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 552         if (machine__is_host(machine)) {
 553                 /*
 554                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 555                  * see kernel/perf_event.c __perf_event_mmap
 556                  */
 557                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 558         } else {
 559                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 560         }
 561
 562         map = machine->vmlinux_maps[MAP__FUNCTION];
 563         kmap = map__kmap(map);
 564         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 565                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 566         size = PERF_ALIGN(size, sizeof(u64));
 567         event->mmap.header.type = PERF_RECORD_MMAP;
 568         event->mmap.header.size = (sizeof(event->mmap) -
 569                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 570         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 571         event->mmap.start = map->start;
 572         event->mmap.len   = map->end - event->mmap.start;
 573         event->mmap.pid   = machine->pid;
 574
 575         err = process(tool, event, &synth_sample, machine);
 576         free(event);
 577
 578         return err;
 579 }
 580
 581 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 582 {
 583         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 584 }
 585
 586 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 587                              union perf_event *event,
 588                              struct perf_sample *sample,
 589                              struct machine *machine)
 590 {
 591         return machine__process_comm_event(machine, event, sample);
 592 }
 593
 594 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 595                              union perf_event *event,
 596                              struct perf_sample *sample,
 597                              struct machine *machine)
 598 {
 599         return machine__process_lost_event(machine, event, sample);
 600 }
 601
 602 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 603 {
 604         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
 605                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 606                        event->mmap.len, event->mmap.pgoff,
 607                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 608                        event->mmap.filename);
 609 }
 610
 611 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 612 {
 613         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 614                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
 615                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 616                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 617                        event->mmap2.min, event->mmap2.ino,
 618                        event->mmap2.ino_generation,
 619                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 620                        event->mmap2.filename);
 621 }
 622
 623 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 624                              union perf_event *event,
 625                              struct perf_sample *sample,
 626                              struct machine *machine)
 627 {
 628         return machine__process_mmap_event(machine, event, sample);
 629 }
 630
 631 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 632                              union perf_event *event,
 633                              struct perf_sample *sample,
 634                              struct machine *machine)
 635 {
 636         return machine__process_mmap2_event(machine, event, sample);
 637 }
 638
 639 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 640 {
 641         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 642                        event->fork.pid, event->fork.tid,
 643                        event->fork.ppid, event->fork.ptid);
 644 }
 645
 646 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 647                              union perf_event *event,
 648                              struct perf_sample *sample,
 649                              struct machine *machine)
 650 {
 651         return machine__process_fork_event(machine, event, sample);
 652 }
 653
 654 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 655                              union perf_event *event,
 656                              struct perf_sample *sample,
 657                              struct machine *machine)
 658 {
 659         return machine__process_exit_event(machine, event, sample);
 660 }
 661
 662 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 663 {
 664         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 665                              perf_event__name(event->header.type));
 666
 667         switch (event->header.type) {
 668         case PERF_RECORD_COMM:
 669                 ret += perf_event__fprintf_comm(event, fp);
 670                 break;
 671         case PERF_RECORD_FORK:
 672         case PERF_RECORD_EXIT:
 673                 ret += perf_event__fprintf_task(event, fp);
 674                 break;
 675         case PERF_RECORD_MMAP:
 676                 ret += perf_event__fprintf_mmap(event, fp);
 677                 break;
 678         case PERF_RECORD_MMAP2:
 679                 ret += perf_event__fprintf_mmap2(event, fp);
 680                 break;
 681         default:
 682                 ret += fprintf(fp, "\n");
 683         }
 684
 685         return ret;
 686 }
 687
 688 int perf_event__process(struct perf_tool *tool __maybe_unused,
 689                         union perf_event *event,
 690                         struct perf_sample *sample,
 691                         struct machine *machine)
 692 {
 693         return machine__process_event(machine, event, sample);
 694 }
 695
 696 void thread__find_addr_map(struct thread *thread,
 697                            struct machine *machine, u8 cpumode,
 698                            enum map_type type, u64 addr,
 699                            struct addr_location *al)
 700 {
 701         struct map_groups *mg = &thread->mg;
 702         bool load_map = false;
 703
 704         al->machine = machine;
 705         al->thread = thread;
 706         al->addr = addr;
 707         al->cpumode = cpumode;
 708         al->filtered = false;
 709
 710         if (machine == NULL) {
 711                 al->map = NULL;
 712                 return;
 713         }
 714
 715         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 716                 al->level = 'k';
 717                 mg = &machine->kmaps;
 718                 load_map = true;
 719         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 720                 al->level = '.';
 721         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 722                 al->level = 'g';
 723                 mg = &machine->kmaps;
 724                 load_map = true;
 725         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 726                 al->level = 'u';
 727         } else {
 728                 al->level = 'H';
 729                 al->map = NULL;
 730
 731                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 732                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 733                         !perf_guest)
 734                         al->filtered = true;
 735                 if ((cpumode == PERF_RECORD_MISC_USER ||
 736                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 737                         !perf_host)
 738                         al->filtered = true;
 739
 740                 return;
 741         }
 742 try_again:
 743         al->map = map_groups__find(mg, type, al->addr);
 744         if (al->map == NULL) {
 745                 /*
 746                  * If this is outside of all known maps, and is a negative
 747                  * address, try to look it up in the kernel dso, as it might be
 748                  * a vsyscall or vdso (which executes in user-mode).
 749                  *
 750                  * XXX This is nasty, we should have a symbol list in the
 751                  * "[vdso]" dso, but for now lets use the old trick of looking
 752                  * in the whole kernel symbol list.
 753                  */
 754                 if ((long long)al->addr < 0 &&
 755                     cpumode == PERF_RECORD_MISC_USER &&
 756                     machine && mg != &machine->kmaps) {
 757                         mg = &machine->kmaps;
 758                         goto try_again;
 759                 }
 760         } else {
 761                 /*
 762                  * Kernel maps might be changed when loading symbols so loading
 763                  * must be done prior to using kernel maps.
 764                  */
 765                 if (load_map)
 766                         map__load(al->map, machine->symbol_filter);
 767                 al->addr = al->map->map_ip(al->map, al->addr);
 768         }
 769 }
 770
 771 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 772                                 u8 cpumode, enum map_type type, u64 addr,
 773                                 struct addr_location *al)
 774 {
 775         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 776         if (al->map != NULL)
 777                 al->sym = map__find_symbol(al->map, al->addr,
 778                                            machine->symbol_filter);
 779         else
 780                 al->sym = NULL;
 781 }
 782
 783 int perf_event__preprocess_sample(const union perf_event *event,
 784                                   struct machine *machine,
 785                                   struct addr_location *al,
 786                                   struct perf_sample *sample)
 787 {
 788         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 789         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 790                                                         sample->pid);
 791
 792         if (thread == NULL)
 793                 return -1;
 794
 795         if (thread__is_filtered(thread))
 796                 goto out_filtered;
 797
 798         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 799         /*
 800          * Have we already created the kernel maps for this machine?
 801          *
 802          * This should have happened earlier, when we processed the kernel MMAP
 803          * events, but for older perf.data files there was no such thing, so do
 804          * it now.
 805          */
 806         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 807             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 808                 machine__create_kernel_maps(machine);
 809
 810         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 811                               sample->ip, al);
 812         dump_printf(" ...... dso: %s\n",
 813                     al->map ? al->map->dso->long_name :
 814                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 815         al->sym = NULL;
 816         al->cpu = sample->cpu;
 817
 818         if (al->map) {
 819                 struct dso *dso = al->map->dso;
 820
 821                 if (symbol_conf.dso_list &&
 822                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 823                                                   dso->short_name) ||
 824                                (dso->short_name != dso->long_name &&
 825                                 strlist__has_entry(symbol_conf.dso_list,
 826                                                    dso->long_name)))))
 827                         goto out_filtered;
 828
 829                 al->sym = map__find_symbol(al->map, al->addr,
 830                                            machine->symbol_filter);
 831         }
 832
 833         if (symbol_conf.sym_list &&
 834                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 835                                                 al->sym->name)))
 836                 goto out_filtered;
 837
 838         return 0;
 839
 840 out_filtered:
 841         al->filtered = true;
 842         return 0;
 843 }