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 {
 175         char filename[PATH_MAX];
 176         FILE *fp;
 177         int rc = 0;
 178
 179         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 180
 181         fp = fopen(filename, "r");
 182         if (fp == NULL) {
 183                 /*
 184                  * We raced with a task exiting - just return:
 185                  */
 186                 pr_debug("couldn't open %s\n", filename);
 187                 return -1;
 188         }
 189
 190         event->header.type = PERF_RECORD_MMAP2;
 191         /*
 192          * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 193          */
 194         event->header.misc = PERF_RECORD_MISC_USER;
 195
 196         while (1) {
 197                 char bf[BUFSIZ];
 198                 char prot[5];
 199                 char execname[PATH_MAX];
 200                 char anonstr[] = "//anon";
 201                 unsigned int ino;
 202                 size_t size;
 203                 ssize_t n;
 204
 205                 if (fgets(bf, sizeof(bf), fp) == NULL)
 206                         break;
 207
 208                 /* ensure null termination since stack will be reused. */
 209                 strcpy(execname, "");
 210
 211                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 212                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
 213                        &event->mmap2.start, &event->mmap2.len, prot,
 214                        &event->mmap2.pgoff, &event->mmap2.maj,
 215                        &event->mmap2.min,
 216                        &ino, execname);
 217
 218                 event->mmap2.ino = (u64)ino;
 219
 220                 if (n != 8)
 221                         continue;
 222
 223                 if (prot[2] != 'x')
 224                         continue;
 225
 226                 if (!strcmp(execname, ""))
 227                         strcpy(execname, anonstr);
 228
 229                 size = strlen(execname) + 1;
 230                 memcpy(event->mmap2.filename, execname, size);
 231                 size = PERF_ALIGN(size, sizeof(u64));
 232                 event->mmap2.len -= event->mmap.start;
 233                 event->mmap2.header.size = (sizeof(event->mmap2) -
 234                                         (sizeof(event->mmap2.filename) - size));
 235                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 236                 event->mmap2.header.size += machine->id_hdr_size;
 237                 event->mmap2.pid = tgid;
 238                 event->mmap2.tid = pid;
 239
 240                 if (process(tool, event, &synth_sample, machine) != 0) {
 241                         rc = -1;
 242                         break;
 243                 }
 244         }
 245
 246         fclose(fp);
 247         return rc;
 248 }
 249
 250 int perf_event__synthesize_modules(struct perf_tool *tool,
 251                                    perf_event__handler_t process,
 252                                    struct machine *machine)
 253 {
 254         int rc = 0;
 255         struct rb_node *nd;
 256         struct map_groups *kmaps = &machine->kmaps;
 257         union perf_event *event = zalloc((sizeof(event->mmap) +
 258                                           machine->id_hdr_size));
 259         if (event == NULL) {
 260                 pr_debug("Not enough memory synthesizing mmap event "
 261                          "for kernel modules\n");
 262                 return -1;
 263         }
 264
 265         event->header.type = PERF_RECORD_MMAP;
 266
 267         /*
 268          * kernel uses 0 for user space maps, see kernel/perf_event.c
 269          * __perf_event_mmap
 270          */
 271         if (machine__is_host(machine))
 272                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 273         else
 274                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 275
 276         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 277              nd; nd = rb_next(nd)) {
 278                 size_t size;
 279                 struct map *pos = rb_entry(nd, struct map, rb_node);
 280
 281                 if (pos->dso->kernel)
 282                         continue;
 283
 284                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 285                 event->mmap.header.type = PERF_RECORD_MMAP;
 286                 event->mmap.header.size = (sizeof(event->mmap) -
 287                                         (sizeof(event->mmap.filename) - size));
 288                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 289                 event->mmap.header.size += machine->id_hdr_size;
 290                 event->mmap.start = pos->start;
 291                 event->mmap.len   = pos->end - pos->start;
 292                 event->mmap.pid   = machine->pid;
 293
 294                 memcpy(event->mmap.filename, pos->dso->long_name,
 295                        pos->dso->long_name_len + 1);
 296                 if (process(tool, event, &synth_sample, machine) != 0) {
 297                         rc = -1;
 298                         break;
 299                 }
 300         }
 301
 302         free(event);
 303         return rc;
 304 }
 305
 306 static int __event__synthesize_thread(union perf_event *comm_event,
 307                                       union perf_event *mmap_event,
 308                                       pid_t pid, int full,
 309                                           perf_event__handler_t process,
 310                                       struct perf_tool *tool,
 311                                       struct machine *machine)
 312 {
 313         pid_t tgid = perf_event__synthesize_comm(tool, comm_event, pid, full,
 314                                                  process, machine);
 315         if (tgid == -1)
 316                 return -1;
 317         return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 318                                                   process, machine);
 319 }
 320
 321 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 322                                       struct thread_map *threads,
 323                                       perf_event__handler_t process,
 324                                       struct machine *machine)
 325 {
 326         union perf_event *comm_event, *mmap_event;
 327         int err = -1, thread, j;
 328
 329         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 330         if (comm_event == NULL)
 331                 goto out;
 332
 333         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 334         if (mmap_event == NULL)
 335                 goto out_free_comm;
 336
 337         err = 0;
 338         for (thread = 0; thread < threads->nr; ++thread) {
 339                 if (__event__synthesize_thread(comm_event, mmap_event,
 340                                                threads->map[thread], 0,
 341                                                process, tool, machine)) {
 342                         err = -1;
 343                         break;
 344                 }
 345
 346                 /*
 347                  * comm.pid is set to thread group id by
 348                  * perf_event__synthesize_comm
 349                  */
 350                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 351                         bool need_leader = true;
 352
 353                         /* is thread group leader in thread_map? */
 354                         for (j = 0; j < threads->nr; ++j) {
 355                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 356                                         need_leader = false;
 357                                         break;
 358                                 }
 359                         }
 360
 361                         /* if not, generate events for it */
 362                         if (need_leader &&
 363                             __event__synthesize_thread(comm_event,
 364                                                       mmap_event,
 365                                                       comm_event->comm.pid, 0,
 366                                                       process, tool, machine)) {
 367                                 err = -1;
 368                                 break;
 369                         }
 370                 }
 371         }
 372         free(mmap_event);
 373 out_free_comm:
 374         free(comm_event);
 375 out:
 376         return err;
 377 }
 378
 379 int perf_event__synthesize_threads(struct perf_tool *tool,
 380                                    perf_event__handler_t process,
 381                                    struct machine *machine)
 382 {
 383         DIR *proc;
 384         struct dirent dirent, *next;
 385         union perf_event *comm_event, *mmap_event;
 386         int err = -1;
 387
 388         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 389         if (comm_event == NULL)
 390                 goto out;
 391
 392         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 393         if (mmap_event == NULL)
 394                 goto out_free_comm;
 395
 396         proc = opendir("/proc");
 397         if (proc == NULL)
 398                 goto out_free_mmap;
 399
 400         while (!readdir_r(proc, &dirent, &next) && next) {
 401                 char *end;
 402                 pid_t pid = strtol(dirent.d_name, &end, 10);
 403
 404                 if (*end) /* only interested in proper numerical dirents */
 405                         continue;
 406                 /*
 407                  * We may race with exiting thread, so don't stop just because
 408                  * one thread couldn't be synthesized.
 409                  */
 410                 __event__synthesize_thread(comm_event, mmap_event, pid, 1,
 411                                            process, tool, machine);
 412         }
 413
 414         err = 0;
 415         closedir(proc);
 416 out_free_mmap:
 417         free(mmap_event);
 418 out_free_comm:
 419         free(comm_event);
 420 out:
 421         return err;
 422 }
 423
 424 struct process_symbol_args {
 425         const char *name;
 426         u64        start;
 427 };
 428
 429 static int find_symbol_cb(void *arg, const char *name, char type,
 430                           u64 start)
 431 {
 432         struct process_symbol_args *args = arg;
 433
 434         /*
 435          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 436          * an 'A' to the same address as "_stext".
 437          */
 438         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 439               type == 'A') || strcmp(name, args->name))
 440                 return 0;
 441
 442         args->start = start;
 443         return 1;
 444 }
 445
 446 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 447                                        perf_event__handler_t process,
 448                                        struct machine *machine,
 449                                        const char *symbol_name)
 450 {
 451         size_t size;
 452         const char *filename, *mmap_name;
 453         char path[PATH_MAX];
 454         char name_buff[PATH_MAX];
 455         struct map *map;
 456         int err;
 457         /*
 458          * We should get this from /sys/kernel/sections/.text, but till that is
 459          * available use this, and after it is use this as a fallback for older
 460          * kernels.
 461          */
 462         struct process_symbol_args args = { .name = symbol_name, };
 463         union perf_event *event = zalloc((sizeof(event->mmap) +
 464                                           machine->id_hdr_size));
 465         if (event == NULL) {
 466                 pr_debug("Not enough memory synthesizing mmap event "
 467                          "for kernel modules\n");
 468                 return -1;
 469         }
 470
 471         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 472         if (machine__is_host(machine)) {
 473                 /*
 474                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 475                  * see kernel/perf_event.c __perf_event_mmap
 476                  */
 477                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 478                 filename = "/proc/kallsyms";
 479         } else {
 480                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 481                 if (machine__is_default_guest(machine))
 482                         filename = (char *) symbol_conf.default_guest_kallsyms;
 483                 else {
 484                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 485                         filename = path;
 486                 }
 487         }
 488
 489         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0) {
 490                 free(event);
 491                 return -ENOENT;
 492         }
 493
 494         map = machine->vmlinux_maps[MAP__FUNCTION];
 495         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 496                         "%s%s", mmap_name, symbol_name) + 1;
 497         size = PERF_ALIGN(size, sizeof(u64));
 498         event->mmap.header.type = PERF_RECORD_MMAP;
 499         event->mmap.header.size = (sizeof(event->mmap) -
 500                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 501         event->mmap.pgoff = args.start;
 502         event->mmap.start = map->start;
 503         event->mmap.len   = map->end - event->mmap.start;
 504         event->mmap.pid   = machine->pid;
 505
 506         err = process(tool, event, &synth_sample, machine);
 507         free(event);
 508
 509         return err;
 510 }
 511
 512 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 513 {
 514         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 515 }
 516
 517 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 518                              union perf_event *event,
 519                              struct perf_sample *sample __maybe_unused,
 520                              struct machine *machine)
 521 {
 522         return machine__process_comm_event(machine, event);
 523 }
 524
 525 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 526                              union perf_event *event,
 527                              struct perf_sample *sample __maybe_unused,
 528                              struct machine *machine)
 529 {
 530         return machine__process_lost_event(machine, event);
 531 }
 532
 533 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 534 {
 535         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
 536                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 537                        event->mmap.len, event->mmap.pgoff, event->mmap.filename);
 538 }
 539
 540 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 541 {
 542         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 543                            " %02x:%02x %"PRIu64" %"PRIu64"]: %s\n",
 544                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 545                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 546                        event->mmap2.min, event->mmap2.ino,
 547                        event->mmap2.ino_generation,
 548                        event->mmap2.filename);
 549 }
 550
 551 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 552                              union perf_event *event,
 553                              struct perf_sample *sample __maybe_unused,
 554                              struct machine *machine)
 555 {
 556         return machine__process_mmap_event(machine, event);
 557 }
 558
 559 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 560                              union perf_event *event,
 561                              struct perf_sample *sample __maybe_unused,
 562                              struct machine *machine)
 563 {
 564         return machine__process_mmap2_event(machine, event);
 565 }
 566
 567 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 568 {
 569         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 570                        event->fork.pid, event->fork.tid,
 571                        event->fork.ppid, event->fork.ptid);
 572 }
 573
 574 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 575                              union perf_event *event,
 576                              struct perf_sample *sample __maybe_unused,
 577                              struct machine *machine)
 578 {
 579         return machine__process_fork_event(machine, event);
 580 }
 581
 582 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 583                              union perf_event *event,
 584                              struct perf_sample *sample __maybe_unused,
 585                              struct machine *machine)
 586 {
 587         return machine__process_exit_event(machine, event);
 588 }
 589
 590 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 591 {
 592         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 593                              perf_event__name(event->header.type));
 594
 595         switch (event->header.type) {
 596         case PERF_RECORD_COMM:
 597                 ret += perf_event__fprintf_comm(event, fp);
 598                 break;
 599         case PERF_RECORD_FORK:
 600         case PERF_RECORD_EXIT:
 601                 ret += perf_event__fprintf_task(event, fp);
 602                 break;
 603         case PERF_RECORD_MMAP:
 604                 ret += perf_event__fprintf_mmap(event, fp);
 605                 break;
 606         case PERF_RECORD_MMAP2:
 607                 ret += perf_event__fprintf_mmap2(event, fp);
 608                 break;
 609         default:
 610                 ret += fprintf(fp, "\n");
 611         }
 612
 613         return ret;
 614 }
 615
 616 int perf_event__process(struct perf_tool *tool __maybe_unused,
 617                         union perf_event *event,
 618                         struct perf_sample *sample __maybe_unused,
 619                         struct machine *machine)
 620 {
 621         return machine__process_event(machine, event);
 622 }
 623
 624 void thread__find_addr_map(struct thread *self,
 625                            struct machine *machine, u8 cpumode,
 626                            enum map_type type, u64 addr,
 627                            struct addr_location *al)
 628 {
 629         struct map_groups *mg = &self->mg;
 630         bool load_map = false;
 631
 632         al->thread = self;
 633         al->addr = addr;
 634         al->cpumode = cpumode;
 635         al->filtered = false;
 636
 637         if (machine == NULL) {
 638                 al->map = NULL;
 639                 return;
 640         }
 641
 642         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 643                 al->level = 'k';
 644                 mg = &machine->kmaps;
 645                 load_map = true;
 646         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 647                 al->level = '.';
 648         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 649                 al->level = 'g';
 650                 mg = &machine->kmaps;
 651                 load_map = true;
 652         } else {
 653                 /*
 654                  * 'u' means guest os user space.
 655                  * TODO: We don't support guest user space. Might support late.
 656                  */
 657                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 658                         al->level = 'u';
 659                 else
 660                         al->level = 'H';
 661                 al->map = NULL;
 662
 663                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 664                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 665                         !perf_guest)
 666                         al->filtered = true;
 667                 if ((cpumode == PERF_RECORD_MISC_USER ||
 668                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 669                         !perf_host)
 670                         al->filtered = true;
 671
 672                 return;
 673         }
 674 try_again:
 675         al->map = map_groups__find(mg, type, al->addr);
 676         if (al->map == NULL) {
 677                 /*
 678                  * If this is outside of all known maps, and is a negative
 679                  * address, try to look it up in the kernel dso, as it might be
 680                  * a vsyscall or vdso (which executes in user-mode).
 681                  *
 682                  * XXX This is nasty, we should have a symbol list in the
 683                  * "[vdso]" dso, but for now lets use the old trick of looking
 684                  * in the whole kernel symbol list.
 685                  */
 686                 if ((long long)al->addr < 0 &&
 687                     cpumode == PERF_RECORD_MISC_USER &&
 688                     machine && mg != &machine->kmaps) {
 689                         mg = &machine->kmaps;
 690                         goto try_again;
 691                 }
 692         } else {
 693                 /*
 694                  * Kernel maps might be changed when loading symbols so loading
 695                  * must be done prior to using kernel maps.
 696                  */
 697                 if (load_map)
 698                         map__load(al->map, machine->symbol_filter);
 699                 al->addr = al->map->map_ip(al->map, al->addr);
 700         }
 701 }
 702
 703 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 704                                 u8 cpumode, enum map_type type, u64 addr,
 705                                 struct addr_location *al)
 706 {
 707         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 708         if (al->map != NULL)
 709                 al->sym = map__find_symbol(al->map, al->addr,
 710                                            machine->symbol_filter);
 711         else
 712                 al->sym = NULL;
 713 }
 714
 715 int perf_event__preprocess_sample(const union perf_event *event,
 716                                   struct machine *machine,
 717                                   struct addr_location *al,
 718                                   struct perf_sample *sample)
 719 {
 720         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 721         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 722                                                         sample->pid);
 723
 724         if (thread == NULL)
 725                 return -1;
 726
 727         if (symbol_conf.comm_list &&
 728             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 729                 goto out_filtered;
 730
 731         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->tid);
 732         /*
 733          * Have we already created the kernel maps for this machine?
 734          *
 735          * This should have happened earlier, when we processed the kernel MMAP
 736          * events, but for older perf.data files there was no such thing, so do
 737          * it now.
 738          */
 739         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 740             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 741                 machine__create_kernel_maps(machine);
 742
 743         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 744                               sample->ip, al);
 745         dump_printf(" ...... dso: %s\n",
 746                     al->map ? al->map->dso->long_name :
 747                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 748         al->sym = NULL;
 749         al->cpu = sample->cpu;
 750
 751         if (al->map) {
 752                 struct dso *dso = al->map->dso;
 753
 754                 if (symbol_conf.dso_list &&
 755                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 756                                                   dso->short_name) ||
 757                                (dso->short_name != dso->long_name &&
 758                                 strlist__has_entry(symbol_conf.dso_list,
 759                                                    dso->long_name)))))
 760                         goto out_filtered;
 761
 762                 al->sym = map__find_symbol(al->map, al->addr,
 763                                            machine->symbol_filter);
 764         }
 765
 766         if (symbol_conf.sym_list &&
 767                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 768                                                 al->sym->name)))
 769                 goto out_filtered;
 770
 771         return 0;
 772
 773 out_filtered:
 774         al->filtered = true;
 775         return 0;
 776 }