tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include "event.h"
   3 #include "debug.h"
   4 #include "sort.h"
   5 #include "string.h"
   6 #include "strlist.h"
   7 #include "thread.h"
   8 #include "thread_map.h"
   9
  10 static const char *perf_event__names[] = {
  11         [0]                                     = "TOTAL",
  12         [PERF_RECORD_MMAP]                      = "MMAP",
  13         [PERF_RECORD_LOST]                      = "LOST",
  14         [PERF_RECORD_COMM]                      = "COMM",
  15         [PERF_RECORD_EXIT]                      = "EXIT",
  16         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  17         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  18         [PERF_RECORD_FORK]                      = "FORK",
  19         [PERF_RECORD_READ]                      = "READ",
  20         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  21         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  22         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  23         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  24         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  25         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  26 };
  27
  28 const char *perf_event__name(unsigned int id)
  29 {
  30         if (id >= ARRAY_SIZE(perf_event__names))
  31                 return "INVALID";
  32         if (!perf_event__names[id])
  33                 return "UNKNOWN";
  34         return perf_event__names[id];
  35 }
  36
  37 static struct perf_sample synth_sample = {
  38         .pid       = -1,
  39         .tid       = -1,
  40         .time      = -1,
  41         .stream_id = -1,
  42         .cpu       = -1,
  43         .period    = 1,
  44 };
  45
  46 static pid_t perf_event__synthesize_comm(struct perf_event_ops *ops,
  47                                          union perf_event *event, pid_t pid,
  48                                          int full, perf_event__handler_t process,
  49                                          struct machine *machine)
  50 {
  51         char filename[PATH_MAX];
  52         char bf[BUFSIZ];
  53         FILE *fp;
  54         size_t size = 0;
  55         DIR *tasks;
  56         struct dirent dirent, *next;
  57         pid_t tgid = 0;
  58
  59         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  60
  61         fp = fopen(filename, "r");
  62         if (fp == NULL) {
  63 out_race:
  64                 /*
  65                  * We raced with a task exiting - just return:
  66                  */
  67                 pr_debug("couldn't open %s\n", filename);
  68                 return 0;
  69         }
  70
  71         memset(&event->comm, 0, sizeof(event->comm));
  72
  73         while (!event->comm.comm[0] || !event->comm.pid) {
  74                 if (fgets(bf, sizeof(bf), fp) == NULL) {
  75                         pr_warning("couldn't get COMM and pgid, malformed %s\n", filename);
  76                         goto out;
  77                 }
  78
  79                 if (memcmp(bf, "Name:", 5) == 0) {
  80                         char *name = bf + 5;
  81                         while (*name && isspace(*name))
  82                                 ++name;
  83                         size = strlen(name) - 1;
  84                         memcpy(event->comm.comm, name, size++);
  85                 } else if (memcmp(bf, "Tgid:", 5) == 0) {
  86                         char *tgids = bf + 5;
  87                         while (*tgids && isspace(*tgids))
  88                                 ++tgids;
  89                         tgid = event->comm.pid = atoi(tgids);
  90                 }
  91         }
  92
  93         event->comm.header.type = PERF_RECORD_COMM;
  94         size = ALIGN(size, sizeof(u64));
  95         memset(event->comm.comm + size, 0, machine->id_hdr_size);
  96         event->comm.header.size = (sizeof(event->comm) -
  97                                 (sizeof(event->comm.comm) - size) +
  98                                 machine->id_hdr_size);
  99         if (!full) {
 100                 event->comm.tid = pid;
 101
 102                 process(ops, event, &synth_sample, machine);
 103                 goto out;
 104         }
 105
 106         snprintf(filename, sizeof(filename), "/proc/%d/task", pid);
 107
 108         tasks = opendir(filename);
 109         if (tasks == NULL)
 110                 goto out_race;
 111
 112         while (!readdir_r(tasks, &dirent, &next) && next) {
 113                 char *end;
 114                 pid = strtol(dirent.d_name, &end, 10);
 115                 if (*end)
 116                         continue;
 117
 118                 event->comm.tid = pid;
 119
 120                 process(ops, event, &synth_sample, machine);
 121         }
 122
 123         closedir(tasks);
 124 out:
 125         fclose(fp);
 126
 127         return tgid;
 128 }
 129
 130 static int perf_event__synthesize_mmap_events(struct perf_event_ops *ops,
 131                                               union perf_event *event,
 132                                               pid_t pid, pid_t tgid,
 133                                               perf_event__handler_t process,
 134                                               struct machine *machine)
 135 {
 136         char filename[PATH_MAX];
 137         FILE *fp;
 138
 139         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 140
 141         fp = fopen(filename, "r");
 142         if (fp == NULL) {
 143                 /*
 144                  * We raced with a task exiting - just return:
 145                  */
 146                 pr_debug("couldn't open %s\n", filename);
 147                 return -1;
 148         }
 149
 150         event->header.type = PERF_RECORD_MMAP;
 151         /*
 152          * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 153          */
 154         event->header.misc = PERF_RECORD_MISC_USER;
 155
 156         while (1) {
 157                 char bf[BUFSIZ], *pbf = bf;
 158                 int n;
 159                 size_t size;
 160                 if (fgets(bf, sizeof(bf), fp) == NULL)
 161                         break;
 162
 163                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 164                 n = hex2u64(pbf, &event->mmap.start);
 165                 if (n < 0)
 166                         continue;
 167                 pbf += n + 1;
 168                 n = hex2u64(pbf, &event->mmap.len);
 169                 if (n < 0)
 170                         continue;
 171                 pbf += n + 3;
 172                 if (*pbf == 'x') { /* vm_exec */
 173                         char anonstr[] = "//anon\n";
 174                         char *execname = strchr(bf, '/');
 175
 176                         /* Catch VDSO */
 177                         if (execname == NULL)
 178                                 execname = strstr(bf, "[vdso]");
 179
 180                         /* Catch anonymous mmaps */
 181                         if ((execname == NULL) && !strstr(bf, "["))
 182                                 execname = anonstr;
 183
 184                         if (execname == NULL)
 185                                 continue;
 186
 187                         pbf += 3;
 188                         n = hex2u64(pbf, &event->mmap.pgoff);
 189
 190                         size = strlen(execname);
 191                         execname[size - 1] = '\0'; /* Remove \n */
 192                         memcpy(event->mmap.filename, execname, size);
 193                         size = ALIGN(size, sizeof(u64));
 194                         event->mmap.len -= event->mmap.start;
 195                         event->mmap.header.size = (sizeof(event->mmap) -
 196                                                 (sizeof(event->mmap.filename) - size));
 197                         memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 198                         event->mmap.header.size += machine->id_hdr_size;
 199                         event->mmap.pid = tgid;
 200                         event->mmap.tid = pid;
 201
 202                         process(ops, event, &synth_sample, machine);
 203                 }
 204         }
 205
 206         fclose(fp);
 207         return 0;
 208 }
 209
 210 int perf_event__synthesize_modules(struct perf_event_ops *ops,
 211                                    perf_event__handler_t process,
 212                                    struct machine *machine)
 213 {
 214         struct rb_node *nd;
 215         struct map_groups *kmaps = &machine->kmaps;
 216         union perf_event *event = zalloc((sizeof(event->mmap) +
 217                                           machine->id_hdr_size));
 218         if (event == NULL) {
 219                 pr_debug("Not enough memory synthesizing mmap event "
 220                          "for kernel modules\n");
 221                 return -1;
 222         }
 223
 224         event->header.type = PERF_RECORD_MMAP;
 225
 226         /*
 227          * kernel uses 0 for user space maps, see kernel/perf_event.c
 228          * __perf_event_mmap
 229          */
 230         if (machine__is_host(machine))
 231                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 232         else
 233                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 234
 235         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 236              nd; nd = rb_next(nd)) {
 237                 size_t size;
 238                 struct map *pos = rb_entry(nd, struct map, rb_node);
 239
 240                 if (pos->dso->kernel)
 241                         continue;
 242
 243                 size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 244                 event->mmap.header.type = PERF_RECORD_MMAP;
 245                 event->mmap.header.size = (sizeof(event->mmap) -
 246                                         (sizeof(event->mmap.filename) - size));
 247                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 248                 event->mmap.header.size += machine->id_hdr_size;
 249                 event->mmap.start = pos->start;
 250                 event->mmap.len   = pos->end - pos->start;
 251                 event->mmap.pid   = machine->pid;
 252
 253                 memcpy(event->mmap.filename, pos->dso->long_name,
 254                        pos->dso->long_name_len + 1);
 255                 process(ops, event, &synth_sample, machine);
 256         }
 257
 258         free(event);
 259         return 0;
 260 }
 261
 262 static int __event__synthesize_thread(union perf_event *comm_event,
 263                                       union perf_event *mmap_event,
 264                                       pid_t pid, perf_event__handler_t process,
 265                                       struct perf_event_ops *ops,
 266                                       struct machine *machine)
 267 {
 268         pid_t tgid = perf_event__synthesize_comm(ops, comm_event, pid, 1,
 269                                                  process, machine);
 270         if (tgid == -1)
 271                 return -1;
 272         return perf_event__synthesize_mmap_events(ops, mmap_event, pid, tgid,
 273                                                   process, machine);
 274 }
 275
 276 int perf_event__synthesize_thread_map(struct perf_event_ops *ops,
 277                                       struct thread_map *threads,
 278                                       perf_event__handler_t process,
 279                                       struct machine *machine)
 280 {
 281         union perf_event *comm_event, *mmap_event;
 282         int err = -1, thread;
 283
 284         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 285         if (comm_event == NULL)
 286                 goto out;
 287
 288         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 289         if (mmap_event == NULL)
 290                 goto out_free_comm;
 291
 292         err = 0;
 293         for (thread = 0; thread < threads->nr; ++thread) {
 294                 if (__event__synthesize_thread(comm_event, mmap_event,
 295                                                threads->map[thread],
 296                                                process, ops, machine)) {
 297                         err = -1;
 298                         break;
 299                 }
 300         }
 301         free(mmap_event);
 302 out_free_comm:
 303         free(comm_event);
 304 out:
 305         return err;
 306 }
 307
 308 int perf_event__synthesize_threads(struct perf_event_ops *ops,
 309                                    perf_event__handler_t process,
 310                                    struct machine *machine)
 311 {
 312         DIR *proc;
 313         struct dirent dirent, *next;
 314         union perf_event *comm_event, *mmap_event;
 315         int err = -1;
 316
 317         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 318         if (comm_event == NULL)
 319                 goto out;
 320
 321         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 322         if (mmap_event == NULL)
 323                 goto out_free_comm;
 324
 325         proc = opendir("/proc");
 326         if (proc == NULL)
 327                 goto out_free_mmap;
 328
 329         while (!readdir_r(proc, &dirent, &next) && next) {
 330                 char *end;
 331                 pid_t pid = strtol(dirent.d_name, &end, 10);
 332
 333                 if (*end) /* only interested in proper numerical dirents */
 334                         continue;
 335
 336                 __event__synthesize_thread(comm_event, mmap_event, pid,
 337                                            process, ops, machine);
 338         }
 339
 340         closedir(proc);
 341         err = 0;
 342 out_free_mmap:
 343         free(mmap_event);
 344 out_free_comm:
 345         free(comm_event);
 346 out:
 347         return err;
 348 }
 349
 350 struct process_symbol_args {
 351         const char *name;
 352         u64        start;
 353 };
 354
 355 static int find_symbol_cb(void *arg, const char *name, char type,
 356                           u64 start, u64 end __used)
 357 {
 358         struct process_symbol_args *args = arg;
 359
 360         /*
 361          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 362          * an 'A' to the same address as "_stext".
 363          */
 364         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 365               type == 'A') || strcmp(name, args->name))
 366                 return 0;
 367
 368         args->start = start;
 369         return 1;
 370 }
 371
 372 int perf_event__synthesize_kernel_mmap(struct perf_event_ops *ops,
 373                                        perf_event__handler_t process,
 374                                        struct machine *machine,
 375                                        const char *symbol_name)
 376 {
 377         size_t size;
 378         const char *filename, *mmap_name;
 379         char path[PATH_MAX];
 380         char name_buff[PATH_MAX];
 381         struct map *map;
 382         int err;
 383         /*
 384          * We should get this from /sys/kernel/sections/.text, but till that is
 385          * available use this, and after it is use this as a fallback for older
 386          * kernels.
 387          */
 388         struct process_symbol_args args = { .name = symbol_name, };
 389         union perf_event *event = zalloc((sizeof(event->mmap) +
 390                                           machine->id_hdr_size));
 391         if (event == NULL) {
 392                 pr_debug("Not enough memory synthesizing mmap event "
 393                          "for kernel modules\n");
 394                 return -1;
 395         }
 396
 397         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 398         if (machine__is_host(machine)) {
 399                 /*
 400                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 401                  * see kernel/perf_event.c __perf_event_mmap
 402                  */
 403                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 404                 filename = "/proc/kallsyms";
 405         } else {
 406                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 407                 if (machine__is_default_guest(machine))
 408                         filename = (char *) symbol_conf.default_guest_kallsyms;
 409                 else {
 410                         sprintf(path, "%s/proc/kallsyms", machine->root_dir);
 411                         filename = path;
 412                 }
 413         }
 414
 415         if (kallsyms__parse(filename, &args, find_symbol_cb) <= 0)
 416                 return -ENOENT;
 417
 418         map = machine->vmlinux_maps[MAP__FUNCTION];
 419         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 420                         "%s%s", mmap_name, symbol_name) + 1;
 421         size = ALIGN(size, sizeof(u64));
 422         event->mmap.header.type = PERF_RECORD_MMAP;
 423         event->mmap.header.size = (sizeof(event->mmap) -
 424                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 425         event->mmap.pgoff = args.start;
 426         event->mmap.start = map->start;
 427         event->mmap.len   = map->end - event->mmap.start;
 428         event->mmap.pid   = machine->pid;
 429
 430         err = process(ops, event, &synth_sample, machine);
 431         free(event);
 432
 433         return err;
 434 }
 435
 436 int perf_event__process_comm(struct perf_event_ops *ops __used,
 437                              union perf_event *event,
 438                              struct perf_sample *sample __used,
 439                              struct machine *machine)
 440 {
 441         struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
 442
 443         dump_printf(": %s:%d\n", event->comm.comm, event->comm.tid);
 444
 445         if (thread == NULL || thread__set_comm(thread, event->comm.comm)) {
 446                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
 447                 return -1;
 448         }
 449
 450         return 0;
 451 }
 452
 453 int perf_event__process_lost(struct perf_event_ops *ops __used,
 454                              union perf_event *event,
 455                              struct perf_sample *sample __used,
 456                              struct machine *machine __used)
 457 {
 458         dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
 459                     event->lost.id, event->lost.lost);
 460         return 0;
 461 }
 462
 463 static void perf_event__set_kernel_mmap_len(union perf_event *event,
 464                                             struct map **maps)
 465 {
 466         maps[MAP__FUNCTION]->start = event->mmap.start;
 467         maps[MAP__FUNCTION]->end   = event->mmap.start + event->mmap.len;
 468         /*
 469          * Be a bit paranoid here, some perf.data file came with
 470          * a zero sized synthesized MMAP event for the kernel.
 471          */
 472         if (maps[MAP__FUNCTION]->end == 0)
 473                 maps[MAP__FUNCTION]->end = ~0ULL;
 474 }
 475
 476 static int perf_event__process_kernel_mmap(struct perf_event_ops *ops __used,
 477                                            union perf_event *event,
 478                                            struct machine *machine)
 479 {
 480         struct map *map;
 481         char kmmap_prefix[PATH_MAX];
 482         enum dso_kernel_type kernel_type;
 483         bool is_kernel_mmap;
 484
 485         machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
 486         if (machine__is_host(machine))
 487                 kernel_type = DSO_TYPE_KERNEL;
 488         else
 489                 kernel_type = DSO_TYPE_GUEST_KERNEL;
 490
 491         is_kernel_mmap = memcmp(event->mmap.filename,
 492                                 kmmap_prefix,
 493                                 strlen(kmmap_prefix)) == 0;
 494         if (event->mmap.filename[0] == '/' ||
 495             (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
 496
 497                 char short_module_name[1024];
 498                 char *name, *dot;
 499
 500                 if (event->mmap.filename[0] == '/') {
 501                         name = strrchr(event->mmap.filename, '/');
 502                         if (name == NULL)
 503                                 goto out_problem;
 504
 505                         ++name; /* skip / */
 506                         dot = strrchr(name, '.');
 507                         if (dot == NULL)
 508                                 goto out_problem;
 509                         snprintf(short_module_name, sizeof(short_module_name),
 510                                         "[%.*s]", (int)(dot - name), name);
 511                         strxfrchar(short_module_name, '-', '_');
 512                 } else
 513                         strcpy(short_module_name, event->mmap.filename);
 514
 515                 map = machine__new_module(machine, event->mmap.start,
 516                                           event->mmap.filename);
 517                 if (map == NULL)
 518                         goto out_problem;
 519
 520                 name = strdup(short_module_name);
 521                 if (name == NULL)
 522                         goto out_problem;
 523
 524                 map->dso->short_name = name;
 525                 map->dso->sname_alloc = 1;
 526                 map->end = map->start + event->mmap.len;
 527         } else if (is_kernel_mmap) {
 528                 const char *symbol_name = (event->mmap.filename +
 529                                 strlen(kmmap_prefix));
 530                 /*
 531                  * Should be there already, from the build-id table in
 532                  * the header.
 533                  */
 534                 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
 535                                                      kmmap_prefix);
 536                 if (kernel == NULL)
 537                         goto out_problem;
 538
 539                 kernel->kernel = kernel_type;
 540                 if (__machine__create_kernel_maps(machine, kernel) < 0)
 541                         goto out_problem;
 542
 543                 perf_event__set_kernel_mmap_len(event, machine->vmlinux_maps);
 544
 545                 /*
 546                  * Avoid using a zero address (kptr_restrict) for the ref reloc
 547                  * symbol. Effectively having zero here means that at record
 548                  * time /proc/sys/kernel/kptr_restrict was non zero.
 549                  */
 550                 if (event->mmap.pgoff != 0) {
 551                         maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
 552                                                          symbol_name,
 553                                                          event->mmap.pgoff);
 554                 }
 555
 556                 if (machine__is_default_guest(machine)) {
 557                         /*
 558                          * preload dso of guest kernel and modules
 559                          */
 560                         dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
 561                                   NULL);
 562                 }
 563         }
 564         return 0;
 565 out_problem:
 566         return -1;
 567 }
 568
 569 int perf_event__process_mmap(struct perf_event_ops *ops,
 570                              union perf_event *event,
 571                              struct perf_sample *sample __used,
 572                              struct machine *machine)
 573 {
 574         struct thread *thread;
 575         struct map *map;
 576         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 577         int ret = 0;
 578
 579         dump_printf(" %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %s\n",
 580                         event->mmap.pid, event->mmap.tid, event->mmap.start,
 581                         event->mmap.len, event->mmap.pgoff, event->mmap.filename);
 582
 583         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
 584             cpumode == PERF_RECORD_MISC_KERNEL) {
 585                 ret = perf_event__process_kernel_mmap(ops, event, machine);
 586                 if (ret < 0)
 587                         goto out_problem;
 588                 return 0;
 589         }
 590
 591         thread = machine__findnew_thread(machine, event->mmap.pid);
 592         if (thread == NULL)
 593                 goto out_problem;
 594         map = map__new(&machine->user_dsos, event->mmap.start,
 595                         event->mmap.len, event->mmap.pgoff,
 596                         event->mmap.pid, event->mmap.filename,
 597                         MAP__FUNCTION);
 598         if (map == NULL)
 599                 goto out_problem;
 600
 601         thread__insert_map(thread, map);
 602         return 0;
 603
 604 out_problem:
 605         dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
 606         return 0;
 607 }
 608
 609 int perf_event__process_task(struct perf_event_ops *ops __used,
 610                              union perf_event *event,
 611                              struct perf_sample *sample __used,
 612                               struct machine *machine)
 613 {
 614         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
 615         struct thread *parent = machine__findnew_thread(machine, event->fork.ptid);
 616
 617         dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
 618                     event->fork.ppid, event->fork.ptid);
 619
 620         if (event->header.type == PERF_RECORD_EXIT) {
 621                 machine__remove_thread(machine, thread);
 622                 return 0;
 623         }
 624
 625         if (thread == NULL || parent == NULL ||
 626             thread__fork(thread, parent) < 0) {
 627                 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
 628                 return -1;
 629         }
 630
 631         return 0;
 632 }
 633
 634 int perf_event__process(struct perf_event_ops *ops, union perf_event *event,
 635                         struct perf_sample *sample, struct machine *machine)
 636 {
 637         switch (event->header.type) {
 638         case PERF_RECORD_COMM:
 639                 perf_event__process_comm(ops, event, sample, machine);
 640                 break;
 641         case PERF_RECORD_MMAP:
 642                 perf_event__process_mmap(ops, event, sample, machine);
 643                 break;
 644         case PERF_RECORD_FORK:
 645         case PERF_RECORD_EXIT:
 646                 perf_event__process_task(ops, event, sample, machine);
 647                 break;
 648         case PERF_RECORD_LOST:
 649                 perf_event__process_lost(ops, event, sample, machine);
 650         default:
 651                 break;
 652         }
 653
 654         return 0;
 655 }
 656
 657 void thread__find_addr_map(struct thread *self,
 658                            struct machine *machine, u8 cpumode,
 659                            enum map_type type, u64 addr,
 660                            struct addr_location *al)
 661 {
 662         struct map_groups *mg = &self->mg;
 663
 664         al->thread = self;
 665         al->addr = addr;
 666         al->cpumode = cpumode;
 667         al->filtered = false;
 668
 669         if (machine == NULL) {
 670                 al->map = NULL;
 671                 return;
 672         }
 673
 674         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 675                 al->level = 'k';
 676                 mg = &machine->kmaps;
 677         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 678                 al->level = '.';
 679         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 680                 al->level = 'g';
 681                 mg = &machine->kmaps;
 682         } else {
 683                 /*
 684                  * 'u' means guest os user space.
 685                  * TODO: We don't support guest user space. Might support late.
 686                  */
 687                 if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest)
 688                         al->level = 'u';
 689                 else
 690                         al->level = 'H';
 691                 al->map = NULL;
 692
 693                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 694                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 695                         !perf_guest)
 696                         al->filtered = true;
 697                 if ((cpumode == PERF_RECORD_MISC_USER ||
 698                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 699                         !perf_host)
 700                         al->filtered = true;
 701
 702                 return;
 703         }
 704 try_again:
 705         al->map = map_groups__find(mg, type, al->addr);
 706         if (al->map == NULL) {
 707                 /*
 708                  * If this is outside of all known maps, and is a negative
 709                  * address, try to look it up in the kernel dso, as it might be
 710                  * a vsyscall or vdso (which executes in user-mode).
 711                  *
 712                  * XXX This is nasty, we should have a symbol list in the
 713                  * "[vdso]" dso, but for now lets use the old trick of looking
 714                  * in the whole kernel symbol list.
 715                  */
 716                 if ((long long)al->addr < 0 &&
 717                     cpumode == PERF_RECORD_MISC_USER &&
 718                     machine && mg != &machine->kmaps) {
 719                         mg = &machine->kmaps;
 720                         goto try_again;
 721                 }
 722         } else
 723                 al->addr = al->map->map_ip(al->map, al->addr);
 724 }
 725
 726 void thread__find_addr_location(struct thread *thread, struct machine *machine,
 727                                 u8 cpumode, enum map_type type, u64 addr,
 728                                 struct addr_location *al,
 729                                 symbol_filter_t filter)
 730 {
 731         thread__find_addr_map(thread, machine, cpumode, type, addr, al);
 732         if (al->map != NULL)
 733                 al->sym = map__find_symbol(al->map, al->addr, filter);
 734         else
 735                 al->sym = NULL;
 736 }
 737
 738 int perf_event__preprocess_sample(const union perf_event *event,
 739                                   struct machine *machine,
 740                                   struct addr_location *al,
 741                                   struct perf_sample *sample,
 742                                   symbol_filter_t filter)
 743 {
 744         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 745         struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
 746
 747         if (thread == NULL)
 748                 return -1;
 749
 750         if (symbol_conf.comm_list &&
 751             !strlist__has_entry(symbol_conf.comm_list, thread->comm))
 752                 goto out_filtered;
 753
 754         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 755         /*
 756          * Have we already created the kernel maps for this machine?
 757          *
 758          * This should have happened earlier, when we processed the kernel MMAP
 759          * events, but for older perf.data files there was no such thing, so do
 760          * it now.
 761          */
 762         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 763             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 764                 machine__create_kernel_maps(machine);
 765
 766         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 767                               event->ip.ip, al);
 768         dump_printf(" ...... dso: %s\n",
 769                     al->map ? al->map->dso->long_name :
 770                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 771         al->sym = NULL;
 772         al->cpu = sample->cpu;
 773
 774         if (al->map) {
 775                 if (symbol_conf.dso_list &&
 776                     (!al->map || !al->map->dso ||
 777                      !(strlist__has_entry(symbol_conf.dso_list,
 778                                           al->map->dso->short_name) ||
 779                        (al->map->dso->short_name != al->map->dso->long_name &&
 780                         strlist__has_entry(symbol_conf.dso_list,
 781                                            al->map->dso->long_name)))))
 782                         goto out_filtered;
 783
 784                 al->sym = map__find_symbol(al->map, al->addr, filter);
 785         }
 786
 787         if (symbol_conf.sym_list && al->sym &&
 788             !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
 789                 goto out_filtered;
 790
 791         return 0;
 792
 793 out_filtered:
 794         al->filtered = true;
 795         return 0;
 796 }