tools/perf/util/event.c

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