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_MMAP2]                     = "MMAP2",
  15         [PERF_RECORD_LOST]                      = "LOST",
  16         [PERF_RECORD_COMM]                      = "COMM",
  17         [PERF_RECORD_EXIT]                      = "EXIT",
  18         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  19         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  20         [PERF_RECORD_FORK]                      = "FORK",
  21         [PERF_RECORD_READ]                      = "READ",
  22         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  23         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  24         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  25         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  26         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  27         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  28 };
  29
  30 const char *perf_event__name(unsigned int id)
  31 {
  32         if (id >= ARRAY_SIZE(perf_event__names))
  33                 return "INVALID";
  34         if (!perf_event__names[id])
  35                 return "UNKNOWN";
  36         return perf_event__names[id];
  37 }
  38
  39 static struct perf_sample synth_sample = {
  40         .pid       = -1,
  41         .tid       = -1,
  42         .time      = -1,
  43         .stream_id = -1,
  44         .cpu       = -1,
  45         .period    = 1,
  46 };
  47
  48 static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len)
  49 {
  50         char filename[PATH_MAX];
  51         char bf[BUFSIZ];
  52         FILE *fp;
  53         size_t size = 0;
  54         pid_t tgid = -1;
  55
  56         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  57
  58         fp = fopen(filename, "r");
  59         if (fp == NULL) {
  60                 pr_debug("couldn't open %s\n", filename);
  61                 return 0;
  62         }
  63
  64         while (!comm[0] || (tgid < 0)) {
  65                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  66                         pr_warning("couldn't get COMM and pgid, malformed %s\n",
  67                                    filename);
  68                         break;
  69                 }
  70
  71                 if (memcmp(bf, "Name:", 5) == 0) {
  72                         char *name = bf + 5;
  73                         while (*name && isspace(*name))
  74                                 ++name;
  75                         size = strlen(name) - 1;
  76                         if (size >= len)
  77                                 size = len - 1;
  78                         memcpy(comm, name, size);
  79                         comm[size] = '\0';
  80
  81                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  82                         char *tgids = bf + 5;
  83                         while (*tgids && isspace(*tgids))
  84                                 ++tgids;
  85                         tgid = atoi(tgids);
  86                 }
  87         }
  88
  89         fclose(fp);
  90
  91         return tgid;
  92 }
  93
  94 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
  95                                          union perf_event *event, pid_t pid,
  96                                          int full,
  97                                          perf_event__handler_t process,
  98                                          struct machine *machine)
  99 {
 100         char filename[PATH_MAX];
 101         size_t size;
 102         DIR *tasks;
 103         struct dirent dirent, *next;
 104         pid_t tgid;
 105
 106         memset(&event->comm, 0, sizeof(event->comm));
 107
 108         tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
 109                                          sizeof(event->comm.comm));
 110         if (tgid < 0)
 111                 goto out;
 112
 113         event->comm.pid = tgid;
 114         event->comm.header.type = PERF_RECORD_COMM;
 115
 116         size = strlen(event->comm.comm) + 1;
 117         size = PERF_ALIGN(size, sizeof(u64));
 118         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 119         event->comm.header.size = (sizeof(event->comm) -
 120                                 (sizeof(event->comm.comm) - size) +
 121                                 machine->id_hdr_size);
 122         if (!full) {
 123                 event->comm.tid = pid;
 124
 125                 if (process(tool, event, &synth_sample, machine) != 0)
 126                         return -1;
 127
 128                 goto out;
 129         }
 130
 131         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
 132
 133         tasks = opendir(filename);
 134         if (tasks == NULL) {
 135                 pr_debug("couldn't open %s\n", filename);
 136                 return 0;
 137         }
 138
 139         while (!readdir_r(tasks, &dirent, &next) && next) {
 140                 char *end;
 141                 pid = strtol(dirent.d_name, &end, 10);
 142                 if (*end)
 143                         continue;
 144
 145                 /* already have tgid; jut want to update the comm */
 146                 (void) perf_event__get_comm_tgid(pid, event->comm.comm,
 147                                          sizeof(event->comm.comm));
 148
 149                 size = strlen(event->comm.comm) + 1;
 150                 size = PERF_ALIGN(size, sizeof(u64));
 151                 memset(event->comm.comm + size, 0, machine->id_hdr_size);
 152                 event->comm.header.size = (sizeof(event->comm) -
 153                                           (sizeof(event->comm.comm) - size) +
 154                                           machine->id_hdr_size);
 155
 156                 event->comm.tid = pid;
 157
 158                 if (process(tool, event, &synth_sample, machine) != 0) {
 159                         tgid = -1;
 160                         break;
 161                 }
 162         }
 163
 164         closedir(tasks);
 165 out:
 166         return tgid;
 167 }
 168
 169 static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 170                                               union perf_event *event,
 171                                               pid_t pid, pid_t tgid,
 172                                               perf_event__handler_t process,
 173                                               struct machine *machine,
 174                                               bool mmap_data)
 175 {
 176         char filename[PATH_MAX];
 177         FILE *fp;
 178         int rc = 0;
 179
 180         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 181
 182         fp = fopen(filename, "r");
 183         if (fp == NULL) {
 184                 /*
 185                  * We raced with a task exiting - just return:
 186                  */
 187                 pr_debug("couldn't open %s\n", filename);
 188                 return -1;
 189         }
 190
 191         event->header.type = PERF_RECORD_MMAP;
 192
 193         while (1) {
 194                 char bf[BUFSIZ];
 195                 char prot[5];
 196                 char execname[PATH_MAX];
 197                 char anonstr[] = "//anon";
 198                 size_t size;
 199                 ssize_t n;
 200
 201                 if (fgets(bf, sizeof(bf), fp) == NULL)
 202                         break;
 203
 204                 /* ensure null termination since stack will be reused. */
 205                 strcpy(execname, "");
 206
 207                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 208                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
 209                        &event->mmap.start, &event->mmap.len, prot,
 210                        &event->mmap.pgoff,
 211                        execname);
 212                 /*
 213                  * Anon maps don't have the execname.
 214                  */
 215                 if (n < 4)
 216                         continue;
 217                 /*
 218                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 219                  */
 220                 event->header.misc = PERF_RECORD_MISC_USER;
 221
 222                 if (prot[2] != 'x') {
 223                         if (!mmap_data || prot[0] != 'r')
 224                                 continue;
 225
 226                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 227                 }
 228
 229                 if (!strcmp(execname, ""))
 230                         strcpy(execname, anonstr);
 231
 232                 size = strlen(execname) + 1;
 233                 memcpy(event->mmap.filename, execname, size);
 234                 size = PERF_ALIGN(size, sizeof(u64));
 235                 event->mmap.len -= event->mmap.start;
 236                 event->mmap.header.size = (sizeof(event->mmap) -
 237                                         (sizeof(event->mmap.filename) - size));
 238                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 239                 event->mmap.header.size += machine->id_hdr_size;
 240                 event->mmap.pid = tgid;
 241                 event->mmap.tid = pid;
 242
 243                 if (process(tool, event, &synth_sample, machine) != 0) {
 244                         rc = -1;
 245                         break;
 246                 }
 247         }
 248
 249         fclose(fp);
 250         return rc;
 251 }
 252
 253 int perf_event__synthesize_modules(struct perf_tool *tool,
 254                                    perf_event__handler_t process,
 255                                    struct machine *machine)
 256 {
 257         int rc = 0;
 258         struct rb_node *nd;
 259         struct map_groups *kmaps = &machine->kmaps;
 260         union perf_event *event = zalloc((sizeof(event->mmap) +
 261                                           machine->id_hdr_size));
 262         if (event == NULL) {
 263                 pr_debug("Not enough memory synthesizing mmap event "
 264                          "for kernel modules\n");
 265                 return -1;
 266         }
 267
 268         event->header.type = PERF_RECORD_MMAP;
 269
 270         /*
 271          * kernel uses 0 for user space maps, see kernel/perf_event.c
 272          * __perf_event_mmap
 273          */
 274         if (machine__is_host(machine))
 275                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 276         else
 277                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 278
 279         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 280              nd; nd = rb_next(nd)) {
 281                 size_t size;
 282                 struct map *pos = rb_entry(nd, struct map, rb_node);
 283
 284                 if (pos->dso->kernel)
 285                         continue;
 286
 287                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 288                 event->mmap.header.type = PERF_RECORD_MMAP;
 289                 event->mmap.header.size = (sizeof(event->mmap) -
 290                                         (sizeof(event->mmap.filename) - size));
 291                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 292                 event->mmap.header.size += machine->id_hdr_size;
 293                 event->mmap.start = pos->start;
 294                 event->mmap.len   = pos->end - pos->start;
 295                 event->mmap.pid   = machine->pid;
 296
 297                 memcpy(event->mmap.filename, pos->dso->long_name,
 298                        pos->dso->long_name_len + 1);
 299                 if (process(tool, event, &synth_sample, machine) != 0) {
 300                         rc = -1;
 301                         break;
 302                 }
 303         }
 304
 305         free(event);
 306         return rc;
 307 }
 308
 309 static int __event__synthesize_thread(union perf_event *comm_event,
 310                                       union perf_event *mmap_event,
 311                                       pid_t pid, int full,
 312                                           perf_event__handler_t process,
 313                                       struct perf_tool *tool,
 314                                       struct machine *machine, bool mmap_data)
 315 {
 316         pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
 317                                                  process, machine);
 318         if (tgid == -1)
 319                 return -1;
 320         return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 321                                                   process, machine, mmap_data);
 322 }
 323
 324 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 325                                       struct thread_map *threads,
 326                                       perf_event__handler_t process,
 327                                       struct machine *machine,
 328                                       bool mmap_data)
 329 {
 330         union perf_event *comm_event, *mmap_event;
 331         int err = -1, thread, j;
 332
 333         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 334         if (comm_event == NULL)
 335                 goto out;
 336
 337         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 338         if (mmap_event == NULL)
 339                 goto out_free_comm;
 340
 341         err = 0;
 342         for (thread = 0; thread < threads->nr; ++thread) {
 343                 if (__event__synthesize_thread(comm_event, mmap_event,
 344                                                threads->map[thread], 0,
 345                                                process, tool, machine,
 346                                                mmap_data)) {
 347                         err = -1;
 348                         break;
 349                 }
 350
 351                 /*
 352                  * comm.pid is set to thread group id by
 353                  * perf_event__synthesize_comm
 354                  */
 355                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 356                         bool need_leader = true;
 357
 358                         /* is thread group leader in thread_map? */
 359                         for (j = 0; j < threads->nr; ++j) {
 360                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 361                                         need_leader = false;
 362                                         break;
 363                                 }
 364                         }
 365
 366                         /* if not, generate events for it */
 367                         if (need_leader &&
 368                             __event__synthesize_thread(comm_event, mmap_event,
 369                                                        comm_event->comm.pid, 0,
 370                                                        process, tool, machine,
 371                                                        mmap_data)) {
 372                                 err = -1;
 373                                 break;
 374                         }
 375                 }
 376         }
 377         free(mmap_event);
 378 out_free_comm:
 379         free(comm_event);
 380 out:
 381         return err;
 382 }
 383
 384 int perf_event__synthesize_threads(struct perf_tool *tool,
 385                                    perf_event__handler_t process,
 386                                    struct machine *machine, bool mmap_data)
 387 {
 388         DIR *proc;
 389         struct dirent dirent, *next;
 390         union perf_event *comm_event, *mmap_event;
 391         int err = -1;
 392
 393         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 394         if (comm_event == NULL)
 395                 goto out;
 396
 397         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 398         if (mmap_event == NULL)
 399                 goto out_free_comm;
 400
 401         proc = opendir("/proc");
 402         if (proc == NULL)
 403                 goto out_free_mmap;
 404
 405         while (!readdir_r(proc, &dirent, &next) && next) {
 406                 char *end;
 407                 pid_t pid = strtol(dirent.d_name, &end, 10);
 408
 409                 if (*end) /* only interested in proper numerical dirents */
 410                         continue;
 411                 /*
 412                  * We may race with exiting thread, so don't stop just because
 413                  * one thread couldn't be synthesized.
 414                  */
 415                 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
 416                                            process, tool, machine, mmap_data);
 417         }
 418
 419         err = 0;
 420         closedir(proc);
 421 out_free_mmap:
 422         free(mmap_event);
 423 out_free_comm:
 424         free(comm_event);
 425 out:
 426         return err;
 427 }
 428
 429 struct process_symbol_args {
 430         const char *name;
 431         u64        start;
 432 };
 433
 434 static int find_symbol_cb(void *arg, const char *name, char type,
 435                           u64 start)
 436 {
 437         struct process_symbol_args *args = arg;
 438
 439         /*
 440          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 441          * an 'A' to the same address as "_stext".
 442          */
 443         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 444               type == 'A') || strcmp(name, args->name))
 445                 return 0;
 446
 447         args->start = start;
 448         return 1;
 449 }
 450
 451 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 452                                        perf_event__handler_t process,
 453                                        struct machine *machine,
 454                                        const char *symbol_name)
 455 {
 456         size_t size;
 457         const char *filename, *mmap_name;
 458         char path[PATH_MAX];
 459         char name_buff[PATH_MAX];
 460         struct map *map;
 461         int err;
 462         /*
 463          * We should get this from /sys/kernel/sections/.text, but till that is
 464          * available use this, and after it is use this as a fallback for older
 465          * kernels.
 466          */
 467         struct process_symbol_args args = { .name = symbol_name, };
 468         union perf_event *event = zalloc((sizeof(event->mmap) +
 469                                           machine->id_hdr_size));
 470         if (event == NULL) {
 471                 pr_debug("Not enough memory synthesizing mmap event "
 472                          "for kernel modules\n");
 473                 return -1;
 474         }
 475
 476         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 477         if (machine__is_host(machine)) {
 478                 /*
 479                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 480                  * see kernel/perf_event.c __perf_event_mmap
 481                  */
 482                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 483                 filename = "/proc/kallsyms";
 484         } else {
 485                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 486                 if (machine__is_default_guest(machine))
 487                         filename = (char *) symbol_conf.default_guest_kallsyms;
 488                 else {
 489                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 490                         filename = path;
 491                 }
 492         }
 493
 494         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) {
 495                 free(event);
 496                 return -ENOENT;
 497         }
 498
 499         map = machine->vmlinux_maps[MAP__FUNCTION];
 500         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 501                         "%s%s", mmap_name, symbol_name) + 1;
 502         size = PERF_ALIGN(size, sizeof(u64));
 503         event->mmap.header.type = PERF_RECORD_MMAP;
 504         event->mmap.header.size = (sizeof(event->mmap) -
 505                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 506         event->mmap.pgoff = args.start;
 507         event->mmap.start = map->start;
 508         event->mmap.len   = map->end - event->mmap.start;
 509         event->mmap.pid   = machine->pid;
 510
 511         err = process(tool, event, &synth_sample, machine);
 512         free(event);
 513
 514         return err;
 515 }
 516
 517 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 518 {
 519         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 520 }
 521
 522 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 523                              union perf_event *event,
 524                              struct perf_sample *sample,
 525                              struct machine *machine)
 526 {
 527         return machine__process_comm_event(machine, event, sample);
 528 }
 529
 530 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 531                              union perf_event *event,
 532                              struct perf_sample *sample,
 533                              struct machine *machine)
 534 {
 535         return machine__process_lost_event(machine, event, sample);
 536 }
 537
 538 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 539 {
 540         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
 541                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 542                        event->mmap.len, event->mmap.pgoff,
 543                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 544                        event->mmap.filename);
 545 }
 546
 547 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 548 {
 549         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 550                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
 551                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 552                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 553                        event->mmap2.min, event->mmap2.ino,
 554                        event->mmap2.ino_generation,
 555                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 556                        event->mmap2.filename);
 557 }
 558
 559 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 560                              union perf_event *event,
 561                              struct perf_sample *sample,
 562                              struct machine *machine)
 563 {
 564         return machine__process_mmap_event(machine, event, sample);
 565 }
 566
 567 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 568                              union perf_event *event,
 569                              struct perf_sample *sample,
 570                              struct machine *machine)
 571 {
 572         return machine__process_mmap2_event(machine, event, sample);
 573 }
 574
 575 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 576 {
 577         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 578                        event->fork.pid, event->fork.tid,
 579                        event->fork.ppid, event->fork.ptid);
 580 }
 581
 582 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 583                              union perf_event *event,
 584                              struct perf_sample *sample,
 585                              struct machine *machine)
 586 {
 587         return machine__process_fork_event(machine, event, sample);
 588 }
 589
 590 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 591                              union perf_event *event,
 592                              struct perf_sample *sample,
 593                              struct machine *machine)
 594 {
 595         return machine__process_exit_event(machine, event, sample);
 596 }
 597
 598 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 599 {
 600         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 601                              perf_event__name(event->header.type));
 602
 603         switch (event->header.type) {
 604         case PERF_RECORD_COMM:
 605                 ret += perf_event__fprintf_comm(event, fp);
 606                 break;
 607         case PERF_RECORD_FORK:
 608         case PERF_RECORD_EXIT:
 609                 ret += perf_event__fprintf_task(event, fp);
 610                 break;
 611         case PERF_RECORD_MMAP:
 612                 ret += perf_event__fprintf_mmap(event, fp);
 613                 break;
 614         case PERF_RECORD_MMAP2:
 615                 ret += perf_event__fprintf_mmap2(event, fp);
 616                 break;
 617         default:
 618                 ret += fprintf(fp, "\n");
 619         }
 620
 621         return ret;
 622 }
 623
 624 int perf_event__process(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_event(machine, event, sample);
 630 }
 631
 632 void thread__find_addr_map(struct thread *thread,
 633                            struct machine *machine, u8 cpumode,
 634                            enum map_type type, u64 addr,
 635                            struct addr_location *al)
 636 {
 637         struct map_groups *mg = &thread->mg;
 638         bool load_map = false;
 639
 640         al->thread = thread;
 641         al->addr = addr;
 642         al->cpumode = cpumode;
 643         al->filtered = false;
 644
 645         if (machine == NULL) {
 646                 al->map = NULL;
 647                 return;
 648         }
 649
 650         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 651                 al->level = 'k';
 652                 mg = &machine->kmaps;
 653                 load_map = true;
 654         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 655                 al->level = '.';
 656         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 657                 al->level = 'g';
 658                 mg = &machine->kmaps;
 659                 load_map = true;
 660         } else {
 661                 /*
 662                  * 'u' means guest os user space.
 663                  * TODO: We don't support guest user space. Might support late.
 664                  */
 665                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 666                         al->level = 'u';
 667                 else
 668                         al->level = 'H';
 669                 al->map = NULL;
 670
 671                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 672                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 673                         !perf_guest)
 674                         al->filtered = true;
 675                 if ((cpumode == PERF_RECORD_MISC_USER ||
 676                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 677                         !perf_host)
 678                         al->filtered = true;
 679
 680                 return;
 681         }
 682 try_again:
 683         al->map = map_groups__find(mg, type, al->addr);
 684         if (al->map == NULL) {
 685                 /*
 686                  * If this is outside of all known maps, and is a negative
 687                  * address, try to look it up in the kernel dso, as it might be
 688                  * a vsyscall or vdso (which executes in user-mode).
 689                  *
 690                  * XXX This is nasty, we should have a symbol list in the
 691                  * "[vdso]" dso, but for now lets use the old trick of looking
 692                  * in the whole kernel symbol list.
 693                  */
 694                 if ((long long)al->addr < 0 &&
 695                     cpumode == PERF_RECORD_MISC_USER &&
 696                     machine && mg != &machine->kmaps) {
 697                         mg = &machine->kmaps;
 698                         goto try_again;
 699                 }
 700         } else {
 701                 /*
 702                  * Kernel maps might be changed when loading symbols so loading
 703                  * must be done prior to using kernel maps.
 704                  */
 705                 if (load_map)
 706                         map__load(al->map, machine->symbol_filter);
 707                 al->addr = al->map->map_ip(al->map, al->addr);
 708         }
 709 }
 710
 711 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 712                                 u8 cpumode, enum map_type type, u64 addr,
 713                                 struct addr_location *al)
 714 {
 715         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 716         if (al->map != NULL)
 717                 al->sym = map__find_symbol(al->map, al->addr,
 718                                            machine->symbol_filter);
 719         else
 720                 al->sym = NULL;
 721 }
 722
 723 int perf_event__preprocess_sample(const union perf_event *event,
 724                                   struct machine *machine,
 725                                   struct addr_location *al,
 726                                   struct perf_sample *sample)
 727 {
 728         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 729         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 730                                                         sample->pid);
 731
 732         if (thread == NULL)
 733                 return -1;
 734
 735         if (symbol_conf.comm_list &&
 736             !strlist__has_entry(symbol_conf.comm_list, thread__comm_str(thread)))
 737                 goto out_filtered;
 738
 739         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 740         /*
 741          * Have we already created the kernel maps for this machine?
 742          *
 743          * This should have happened earlier, when we processed the kernel MMAP
 744          * events, but for older perf.data files there was no such thing, so do
 745          * it now.
 746          */
 747         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 748             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 749                 machine__create_kernel_maps(machine);
 750
 751         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 752                               sample->ip, al);
 753         dump_printf(" ...... dso: %s\n",
 754                     al->map ? al->map->dso->long_name :
 755                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 756         al->sym = NULL;
 757         al->cpu = sample->cpu;
 758
 759         if (al->map) {
 760                 struct dso *dso = al->map->dso;
 761
 762                 if (symbol_conf.dso_list &&
 763                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 764                                                   dso->short_name) ||
 765                                (dso->short_name != dso->long_name &&
 766                                 strlist__has_entry(symbol_conf.dso_list,
 767                                                    dso->long_name)))))
 768                         goto out_filtered;
 769
 770                 al->sym = map__find_symbol(al->map, al->addr,
 771                                            machine->symbol_filter);
 772         }
 773
 774         if (symbol_conf.sym_list &&
 775                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 776                                                 al->sym->name)))
 777                 goto out_filtered;
 778
 779         return 0;
 780
 781 out_filtered:
 782         al->filtered = true;
 783         return 0;
 784 }