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                 if (n != 5)
 214                         continue;
 215                 /*
 216                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 217                  */
 218                 event->header.misc = PERF_RECORD_MISC_USER;
 219
 220                 if (prot[2] != 'x') {
 221                         if (!mmap_data || prot[0] != 'r')
 222                                 continue;
 223
 224                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 225                 }
 226
 227                 if (!strcmp(execname, ""))
 228                         strcpy(execname, anonstr);
 229
 230                 size = strlen(execname) + 1;
 231                 memcpy(event->mmap.filename, execname, size);
 232                 size = PERF_ALIGN(size, sizeof(u64));
 233                 event->mmap.len -= event->mmap.start;
 234                 event->mmap.header.size = (sizeof(event->mmap) -
 235                                         (sizeof(event->mmap.filename) - size));
 236                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 237                 event->mmap.header.size += machine->id_hdr_size;
 238                 event->mmap.pid = tgid;
 239                 event->mmap.tid = pid;
 240
 241                 if (process(tool, event, &synth_sample, machine) != 0) {
 242                         rc = -1;
 243                         break;
 244                 }
 245         }
 246
 247         fclose(fp);
 248         return rc;
 249 }
 250
 251 int perf_event__synthesize_modules(struct perf_tool *tool,
 252                                    perf_event__handler_t process,
 253                                    struct machine *machine)
 254 {
 255         int rc = 0;
 256         struct rb_node *nd;
 257         struct map_groups *kmaps = &machine->kmaps;
 258         union perf_event *event = zalloc((sizeof(event->mmap) +
 259                                           machine->id_hdr_size));
 260         if (event == NULL) {
 261                 pr_debug("Not enough memory synthesizing mmap event "
 262                          "for kernel modules\n");
 263                 return -1;
 264         }
 265
 266         event->header.type = PERF_RECORD_MMAP;
 267
 268         /*
 269          * kernel uses 0 for user space maps, see kernel/perf_event.c
 270          * __perf_event_mmap
 271          */
 272         if (machine__is_host(machine))
 273                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 274         else
 275                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 276
 277         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 278              nd; nd = rb_next(nd)) {
 279                 size_t size;
 280                 struct map *pos = rb_entry(nd, struct map, rb_node);
 281
 282                 if (pos->dso->kernel)
 283                         continue;
 284
 285                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 286                 event->mmap.header.type = PERF_RECORD_MMAP;
 287                 event->mmap.header.size = (sizeof(event->mmap) -
 288                                         (sizeof(event->mmap.filename) - size));
 289                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 290                 event->mmap.header.size += machine->id_hdr_size;
 291                 event->mmap.start = pos->start;
 292                 event->mmap.len   = pos->end - pos->start;
 293                 event->mmap.pid   = machine->pid;
 294
 295                 memcpy(event->mmap.filename, pos->dso->long_name,
 296                        pos->dso->long_name_len + 1);
 297                 if (process(tool, event, &synth_sample, machine) != 0) {
 298                         rc = -1;
 299                         break;
 300                 }
 301         }
 302
 303         free(event);
 304         return rc;
 305 }
 306
 307 static int __event__synthesize_thread(union perf_event *comm_event,
 308                                       union perf_event *mmap_event,
 309                                       pid_t pid, int full,
 310                                           perf_event__handler_t process,
 311                                       struct perf_tool *tool,
 312                                       struct machine *machine, bool mmap_data)
 313 {
 314         pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
 315                                                  process, machine);
 316         if (tgid == -1)
 317                 return -1;
 318         return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 319                                                   process, machine, mmap_data);
 320 }
 321
 322 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 323                                       struct thread_map *threads,
 324                                       perf_event__handler_t process,
 325                                       struct machine *machine,
 326                                       bool mmap_data)
 327 {
 328         union perf_event *comm_event, *mmap_event;
 329         int err = -1, thread, j;
 330
 331         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 332         if (comm_event == NULL)
 333                 goto out;
 334
 335         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 336         if (mmap_event == NULL)
 337                 goto out_free_comm;
 338
 339         err = 0;
 340         for (thread = 0; thread < threads->nr; ++thread) {
 341                 if (__event__synthesize_thread(comm_event, mmap_event,
 342                                                threads->map[thread], 0,
 343                                                process, tool, machine,
 344                                                mmap_data)) {
 345                         err = -1;
 346                         break;
 347                 }
 348
 349                 /*
 350                  * comm.pid is set to thread group id by
 351                  * perf_event__synthesize_comm
 352                  */
 353                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 354                         bool need_leader = true;
 355
 356                         /* is thread group leader in thread_map? */
 357                         for (j = 0; j < threads->nr; ++j) {
 358                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 359                                         need_leader = false;
 360                                         break;
 361                                 }
 362                         }
 363
 364                         /* if not, generate events for it */
 365                         if (need_leader &&
 366                             __event__synthesize_thread(comm_event, mmap_event,
 367                                                        comm_event->comm.pid, 0,
 368                                                        process, tool, machine,
 369                                                        mmap_data)) {
 370                                 err = -1;
 371                                 break;
 372                         }
 373                 }
 374         }
 375         free(mmap_event);
 376 out_free_comm:
 377         free(comm_event);
 378 out:
 379         return err;
 380 }
 381
 382 int perf_event__synthesize_threads(struct perf_tool *tool,
 383                                    perf_event__handler_t process,
 384                                    struct machine *machine, bool mmap_data)
 385 {
 386         DIR *proc;
 387         struct dirent dirent, *next;
 388         union perf_event *comm_event, *mmap_event;
 389         int err = -1;
 390
 391         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 392         if (comm_event == NULL)
 393                 goto out;
 394
 395         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 396         if (mmap_event == NULL)
 397                 goto out_free_comm;
 398
 399         proc = opendir("/proc");
 400         if (proc == NULL)
 401                 goto out_free_mmap;
 402
 403         while (!readdir_r(proc, &dirent, &next) && next) {
 404                 char *end;
 405                 pid_t pid = strtol(dirent.d_name, &end, 10);
 406
 407                 if (*end) /* only interested in proper numerical dirents */
 408                         continue;
 409                 /*
 410                  * We may race with exiting thread, so don't stop just because
 411                  * one thread couldn't be synthesized.
 412                  */
 413                 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
 414                                            process, tool, machine, mmap_data);
 415         }
 416
 417         err = 0;
 418         closedir(proc);
 419 out_free_mmap:
 420         free(mmap_event);
 421 out_free_comm:
 422         free(comm_event);
 423 out:
 424         return err;
 425 }
 426
 427 struct process_symbol_args {
 428         const char *name;
 429         u64        start;
 430 };
 431
 432 static int find_symbol_cb(void *arg, const char *name, char type,
 433                           u64 start)
 434 {
 435         struct process_symbol_args *args = arg;
 436
 437         /*
 438          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 439          * an 'A' to the same address as "_stext".
 440          */
 441         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 442               type == 'A') || strcmp(name, args->name))
 443                 return 0;
 444
 445         args->start = start;
 446         return 1;
 447 }
 448
 449 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 450                                        perf_event__handler_t process,
 451                                        struct machine *machine,
 452                                        const char *symbol_name)
 453 {
 454         size_t size;
 455         const char *filename, *mmap_name;
 456         char path[PATH_MAX];
 457         char name_buff[PATH_MAX];
 458         struct map *map;
 459         int err;
 460         /*
 461          * We should get this from /sys/kernel/sections/.text, but till that is
 462          * available use this, and after it is use this as a fallback for older
 463          * kernels.
 464          */
 465         struct process_symbol_args args = { .name = symbol_name, };
 466         union perf_event *event = zalloc((sizeof(event->mmap) +
 467                                           machine->id_hdr_size));
 468         if (event == NULL) {
 469                 pr_debug("Not enough memory synthesizing mmap event "
 470                          "for kernel modules\n");
 471                 return -1;
 472         }
 473
 474         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 475         if (machine__is_host(machine)) {
 476                 /*
 477                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 478                  * see kernel/perf_event.c __perf_event_mmap
 479                  */
 480                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 481                 filename = "/proc/kallsyms";
 482         } else {
 483                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 484                 if (machine__is_default_guest(machine))
 485                         filename = (char *) symbol_conf.default_guest_kallsyms;
 486                 else {
 487                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 488                         filename = path;
 489                 }
 490         }
 491
 492         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) {
 493                 free(event);
 494                 return -ENOENT;
 495         }
 496
 497         map = machine->vmlinux_maps[MAP__FUNCTION];
 498         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 499                         "%s%s", mmap_name, symbol_name) + 1;
 500         size = PERF_ALIGN(size, sizeof(u64));
 501         event->mmap.header.type = PERF_RECORD_MMAP;
 502         event->mmap.header.size = (sizeof(event->mmap) -
 503                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 504         event->mmap.pgoff = args.start;
 505         event->mmap.start = map->start;
 506         event->mmap.len   = map->end - event->mmap.start;
 507         event->mmap.pid   = machine->pid;
 508
 509         err = process(tool, event, &synth_sample, machine);
 510         free(event);
 511
 512         return err;
 513 }
 514
 515 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 516 {
 517         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 518 }
 519
 520 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 521                              union perf_event *event,
 522                              struct perf_sample *sample,
 523                              struct machine *machine)
 524 {
 525         return machine__process_comm_event(machine, event, sample);
 526 }
 527
 528 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 529                              union perf_event *event,
 530                              struct perf_sample *sample,
 531                              struct machine *machine)
 532 {
 533         return machine__process_lost_event(machine, event, sample);
 534 }
 535
 536 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 537 {
 538         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
 539                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 540                        event->mmap.len, event->mmap.pgoff,
 541                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 542                        event->mmap.filename);
 543 }
 544
 545 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 546 {
 547         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 548                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
 549                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 550                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 551                        event->mmap2.min, event->mmap2.ino,
 552                        event->mmap2.ino_generation,
 553                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 554                        event->mmap2.filename);
 555 }
 556
 557 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 558                              union perf_event *event,
 559                              struct perf_sample *sample,
 560                              struct machine *machine)
 561 {
 562         return machine__process_mmap_event(machine, event, sample);
 563 }
 564
 565 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 566                              union perf_event *event,
 567                              struct perf_sample *sample,
 568                              struct machine *machine)
 569 {
 570         return machine__process_mmap2_event(machine, event, sample);
 571 }
 572
 573 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 574 {
 575         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 576                        event->fork.pid, event->fork.tid,
 577                        event->fork.ppid, event->fork.ptid);
 578 }
 579
 580 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 581                              union perf_event *event,
 582                              struct perf_sample *sample,
 583                              struct machine *machine)
 584 {
 585         return machine__process_fork_event(machine, event, sample);
 586 }
 587
 588 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 589                              union perf_event *event,
 590                              struct perf_sample *sample,
 591                              struct machine *machine)
 592 {
 593         return machine__process_exit_event(machine, event, sample);
 594 }
 595
 596 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 597 {
 598         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 599                              perf_event__name(event->header.type));
 600
 601         switch (event->header.type) {
 602         case PERF_RECORD_COMM:
 603                 ret += perf_event__fprintf_comm(event, fp);
 604                 break;
 605         case PERF_RECORD_FORK:
 606         case PERF_RECORD_EXIT:
 607                 ret += perf_event__fprintf_task(event, fp);
 608                 break;
 609         case PERF_RECORD_MMAP:
 610                 ret += perf_event__fprintf_mmap(event, fp);
 611                 break;
 612         case PERF_RECORD_MMAP2:
 613                 ret += perf_event__fprintf_mmap2(event, fp);
 614                 break;
 615         default:
 616                 ret += fprintf(fp, "\n");
 617         }
 618
 619         return ret;
 620 }
 621
 622 int perf_event__process(struct perf_tool *tool __maybe_unused,
 623                         union perf_event *event,
 624                         struct perf_sample *sample,
 625                         struct machine *machine)
 626 {
 627         return machine__process_event(machine, event, sample);
 628 }
 629
 630 void thread__find_addr_map(struct thread *thread,
 631                            struct machine *machine, u8 cpumode,
 632                            enum map_type type, u64 addr,
 633                            struct addr_location *al)
 634 {
 635         struct map_groups *mg = &thread->mg;
 636         bool load_map = false;
 637
 638         al->thread = thread;
 639         al->addr = addr;
 640         al->cpumode = cpumode;
 641         al->filtered = false;
 642
 643         if (machine == NULL) {
 644                 al->map = NULL;
 645                 return;
 646         }
 647
 648         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 649                 al->level = 'k';
 650                 mg = &machine->kmaps;
 651                 load_map = true;
 652         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 653                 al->level = '.';
 654         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 655                 al->level = 'g';
 656                 mg = &machine->kmaps;
 657                 load_map = true;
 658         } else {
 659                 /*
 660                  * 'u' means guest os user space.
 661                  * TODO: We don't support guest user space. Might support late.
 662                  */
 663                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 664                         al->level = 'u';
 665                 else
 666                         al->level = 'H';
 667                 al->map = NULL;
 668
 669                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 670                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 671                         !perf_guest)
 672                         al->filtered = true;
 673                 if ((cpumode == PERF_RECORD_MISC_USER ||
 674                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 675                         !perf_host)
 676                         al->filtered = true;
 677
 678                 return;
 679         }
 680 try_again:
 681         al->map = map_groups__find(mg, type, al->addr);
 682         if (al->map == NULL) {
 683                 /*
 684                  * If this is outside of all known maps, and is a negative
 685                  * address, try to look it up in the kernel dso, as it might be
 686                  * a vsyscall or vdso (which executes in user-mode).
 687                  *
 688                  * XXX This is nasty, we should have a symbol list in the
 689                  * "[vdso]" dso, but for now lets use the old trick of looking
 690                  * in the whole kernel symbol list.
 691                  */
 692                 if ((long long)al->addr < 0 &&
 693                     cpumode == PERF_RECORD_MISC_USER &&
 694                     machine && mg != &machine->kmaps) {
 695                         mg = &machine->kmaps;
 696                         goto try_again;
 697                 }
 698         } else {
 699                 /*
 700                  * Kernel maps might be changed when loading symbols so loading
 701                  * must be done prior to using kernel maps.
 702                  */
 703                 if (load_map)
 704                         map__load(al->map, machine->symbol_filter);
 705                 al->addr = al->map->map_ip(al->map, al->addr);
 706         }
 707 }
 708
 709 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 710                                 u8 cpumode, enum map_type type, u64 addr,
 711                                 struct addr_location *al)
 712 {
 713         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 714         if (al->map != NULL)
 715                 al->sym = map__find_symbol(al->map, al->addr,
 716                                            machine->symbol_filter);
 717         else
 718                 al->sym = NULL;
 719 }
 720
 721 int perf_event__preprocess_sample(const union perf_event *event,
 722                                   struct machine *machine,
 723                                   struct addr_location *al,
 724                                   struct perf_sample *sample)
 725 {
 726         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 727         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 728                                                         sample->pid);
 729
 730         if (thread == NULL)
 731                 return -1;
 732
 733         if (symbol_conf.comm_list &&
 734             !strlist__has_entry(symbol_conf.comm_list, thread__comm_str(thread)))
 735                 goto out_filtered;
 736
 737         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 738         /*
 739          * Have we already created the kernel maps for this machine?
 740          *
 741          * This should have happened earlier, when we processed the kernel MMAP
 742          * events, but for older perf.data files there was no such thing, so do
 743          * it now.
 744          */
 745         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 746             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 747                 machine__create_kernel_maps(machine);
 748
 749         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 750                               sample->ip, al);
 751         dump_printf(" ...... dso: %s\n",
 752                     al->map ? al->map->dso->long_name :
 753                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 754         al->sym = NULL;
 755         al->cpu = sample->cpu;
 756
 757         if (al->map) {
 758                 struct dso *dso = al->map->dso;
 759
 760                 if (symbol_conf.dso_list &&
 761                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 762                                                   dso->short_name) ||
 763                                (dso->short_name != dso->long_name &&
 764                                 strlist__has_entry(symbol_conf.dso_list,
 765                                                    dso->long_name)))))
 766                         goto out_filtered;
 767
 768                 al->sym = map__find_symbol(al->map, al->addr,
 769                                            machine->symbol_filter);
 770         }
 771
 772         if (symbol_conf.sym_list &&
 773                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 774                                                 al->sym->name)))
 775                 goto out_filtered;
 776
 777         return 0;
 778
 779 out_filtered:
 780         al->filtered = true;
 781         return 0;
 782 }