kernel/tools/perf/util/event.c

   1 #include <linux/types.h>
   2 #include <sys/mman.h>
   3 #include "event.h"
   4 #include "debug.h"
   5 #include "hist.h"
   6 #include "machine.h"
   7 #include "sort.h"
   8 #include "string.h"
   9 #include "strlist.h"
  10 #include "thread.h"
  11 #include "thread_map.h"
  12 #include "symbol/kallsyms.h"
  13
  14 static const char *perf_event__names[] = {
  15         [0]                                     = "TOTAL",
  16         [PERF_RECORD_MMAP]                      = "MMAP",
  17         [PERF_RECORD_MMAP2]                     = "MMAP2",
  18         [PERF_RECORD_LOST]                      = "LOST",
  19         [PERF_RECORD_COMM]                      = "COMM",
  20         [PERF_RECORD_EXIT]                      = "EXIT",
  21         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  22         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  23         [PERF_RECORD_FORK]                      = "FORK",
  24         [PERF_RECORD_READ]                      = "READ",
  25         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  26         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  27         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  28         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  29         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  30         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  31         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  32 };
  33
  34 const char *perf_event__name(unsigned int id)
  35 {
  36         if (id >= ARRAY_SIZE(perf_event__names))
  37                 return "INVALID";
  38         if (!perf_event__names[id])
  39                 return "UNKNOWN";
  40         return perf_event__names[id];
  41 }
  42
  43 static struct perf_sample synth_sample = {
  44         .pid       = -1,
  45         .tid       = -1,
  46         .time      = -1,
  47         .stream_id = -1,
  48         .cpu       = -1,
  49         .period    = 1,
  50 };
  51
  52 /*
  53  * Assumes that the first 4095 bytes of /proc/pid/stat contains
  54  * the comm, tgid and ppid.
  55  */
  56 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
  57                                     pid_t *tgid, pid_t *ppid)
  58 {
  59         char filename[PATH_MAX];
  60         char bf[4096];
  61         int fd;
  62         size_t size = 0, n;
  63         char *nl, *name, *tgids, *ppids;
  64
  65         *tgid = -1;
  66         *ppid = -1;
  67
  68         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
  69
  70         fd = open(filename, O_RDONLY);
  71         if (fd < 0) {
  72                 pr_debug("couldn't open %s\n", filename);
  73                 return -1;
  74         }
  75
  76         n = read(fd, bf, sizeof(bf) - 1);
  77         close(fd);
  78         if (n <= 0) {
  79                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
  80                            pid);
  81                 return -1;
  82         }
  83         bf[n] = '\0';
  84
  85         name = strstr(bf, "Name:");
  86         tgids = strstr(bf, "Tgid:");
  87         ppids = strstr(bf, "PPid:");
  88
  89         if (name) {
  90                 name += 5;  /* strlen("Name:") */
  91
  92                 while (*name && isspace(*name))
  93                         ++name;
  94
  95                 nl = strchr(name, '\n');
  96                 if (nl)
  97                         *nl = '\0';
  98
  99                 size = strlen(name);
 100                 if (size >= len)
 101                         size = len - 1;
 102                 memcpy(comm, name, size);
 103                 comm[size] = '\0';
 104         } else {
 105                 pr_debug("Name: string not found for pid %d\n", pid);
 106         }
 107
 108         if (tgids) {
 109                 tgids += 5;  /* strlen("Tgid:") */
 110                 *tgid = atoi(tgids);
 111         } else {
 112                 pr_debug("Tgid: string not found for pid %d\n", pid);
 113         }
 114
 115         if (ppids) {
 116                 ppids += 5;  /* strlen("PPid:") */
 117                 *ppid = atoi(ppids);
 118         } else {
 119                 pr_debug("PPid: string not found for pid %d\n", pid);
 120         }
 121
 122         return 0;
 123 }
 124
 125 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 126                                     struct machine *machine,
 127                                     pid_t *tgid, pid_t *ppid)
 128 {
 129         size_t size;
 130
 131         *ppid = -1;
 132
 133         memset(&event->comm, 0, sizeof(event->comm));
 134
 135         if (machine__is_host(machine)) {
 136                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 137                                              sizeof(event->comm.comm),
 138                                              tgid, ppid) != 0) {
 139                         return -1;
 140                 }
 141         } else {
 142                 *tgid = machine->pid;
 143         }
 144
 145         if (*tgid < 0)
 146                 return -1;
 147
 148         event->comm.pid = *tgid;
 149         event->comm.header.type = PERF_RECORD_COMM;
 150
 151         size = strlen(event->comm.comm) + 1;
 152         size = PERF_ALIGN(size, sizeof(u64));
 153         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 154         event->comm.header.size = (sizeof(event->comm) -
 155                                 (sizeof(event->comm.comm) - size) +
 156                                 machine->id_hdr_size);
 157         event->comm.tid = pid;
 158
 159         return 0;
 160 }
 161
 162 static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 163                                          union perf_event *event, pid_t pid,
 164                                          perf_event__handler_t process,
 165                                          struct machine *machine)
 166 {
 167         pid_t tgid, ppid;
 168
 169         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 170                 return -1;
 171
 172         if (process(tool, event, &synth_sample, machine) != 0)
 173                 return -1;
 174
 175         return tgid;
 176 }
 177
 178 static int perf_event__synthesize_fork(struct perf_tool *tool,
 179                                        union perf_event *event,
 180                                        pid_t pid, pid_t tgid, pid_t ppid,
 181                                        perf_event__handler_t process,
 182                                        struct machine *machine)
 183 {
 184         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 185
 186         /*
 187          * for main thread set parent to ppid from status file. For other
 188          * threads set parent pid to main thread. ie., assume main thread
 189          * spawns all threads in a process
 190         */
 191         if (tgid == pid) {
 192                 event->fork.ppid = ppid;
 193                 event->fork.ptid = ppid;
 194         } else {
 195                 event->fork.ppid = tgid;
 196                 event->fork.ptid = tgid;
 197         }
 198         event->fork.pid  = tgid;
 199         event->fork.tid  = pid;
 200         event->fork.header.type = PERF_RECORD_FORK;
 201
 202         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 203
 204         if (process(tool, event, &synth_sample, machine) != 0)
 205                 return -1;
 206
 207         return 0;
 208 }
 209
 210 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 211                                        union perf_event *event,
 212                                        pid_t pid, pid_t tgid,
 213                                        perf_event__handler_t process,
 214                                        struct machine *machine,
 215                                        bool mmap_data)
 216 {
 217         char filename[PATH_MAX];
 218         FILE *fp;
 219         int rc = 0;
 220
 221         if (machine__is_default_guest(machine))
 222                 return 0;
 223
 224         snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 225                  machine->root_dir, pid);
 226
 227         fp = fopen(filename, "r");
 228         if (fp == NULL) {
 229                 /*
 230                  * We raced with a task exiting - just return:
 231                  */
 232                 pr_debug("couldn't open %s\n", filename);
 233                 return -1;
 234         }
 235
 236         event->header.type = PERF_RECORD_MMAP2;
 237
 238         while (1) {
 239                 char bf[BUFSIZ];
 240                 char prot[5];
 241                 char execname[PATH_MAX];
 242                 char anonstr[] = "//anon";
 243                 unsigned int ino;
 244                 size_t size;
 245                 ssize_t n;
 246
 247                 if (fgets(bf, sizeof(bf), fp) == NULL)
 248                         break;
 249
 250                 /* ensure null termination since stack will be reused. */
 251                 strcpy(execname, "");
 252
 253                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 254                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
 255                        &event->mmap2.start, &event->mmap2.len, prot,
 256                        &event->mmap2.pgoff, &event->mmap2.maj,
 257                        &event->mmap2.min,
 258                        &ino, execname);
 259
 260                 /*
 261                  * Anon maps don't have the execname.
 262                  */
 263                 if (n < 7)
 264                         continue;
 265
 266                 event->mmap2.ino = (u64)ino;
 267
 268                 /*
 269                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 270                  */
 271                 if (machine__is_host(machine))
 272                         event->header.misc = PERF_RECORD_MISC_USER;
 273                 else
 274                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 275
 276                 /* map protection and flags bits */
 277                 event->mmap2.prot = 0;
 278                 event->mmap2.flags = 0;
 279                 if (prot[0] == 'r')
 280                         event->mmap2.prot |= PROT_READ;
 281                 if (prot[1] == 'w')
 282                         event->mmap2.prot |= PROT_WRITE;
 283                 if (prot[2] == 'x')
 284                         event->mmap2.prot |= PROT_EXEC;
 285
 286                 if (prot[3] == 's')
 287                         event->mmap2.flags |= MAP_SHARED;
 288                 else
 289                         event->mmap2.flags |= MAP_PRIVATE;
 290
 291                 if (prot[2] != 'x') {
 292                         if (!mmap_data || prot[0] != 'r')
 293                                 continue;
 294
 295                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 296                 }
 297
 298                 if (!strcmp(execname, ""))
 299                         strcpy(execname, anonstr);
 300
 301                 size = strlen(execname) + 1;
 302                 memcpy(event->mmap2.filename, execname, size);
 303                 size = PERF_ALIGN(size, sizeof(u64));
 304                 event->mmap2.len -= event->mmap.start;
 305                 event->mmap2.header.size = (sizeof(event->mmap2) -
 306                                         (sizeof(event->mmap2.filename) - size));
 307                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 308                 event->mmap2.header.size += machine->id_hdr_size;
 309                 event->mmap2.pid = tgid;
 310                 event->mmap2.tid = pid;
 311
 312                 if (process(tool, event, &synth_sample, machine) != 0) {
 313                         rc = -1;
 314                         break;
 315                 }
 316         }
 317
 318         fclose(fp);
 319         return rc;
 320 }
 321
 322 int perf_event__synthesize_modules(struct perf_tool *tool,
 323                                    perf_event__handler_t process,
 324                                    struct machine *machine)
 325 {
 326         int rc = 0;
 327         struct rb_node *nd;
 328         struct map_groups *kmaps = &machine->kmaps;
 329         union perf_event *event = zalloc((sizeof(event->mmap) +
 330                                           machine->id_hdr_size));
 331         if (event == NULL) {
 332                 pr_debug("Not enough memory synthesizing mmap event "
 333                          "for kernel modules\n");
 334                 return -1;
 335         }
 336
 337         event->header.type = PERF_RECORD_MMAP;
 338
 339         /*
 340          * kernel uses 0 for user space maps, see kernel/perf_event.c
 341          * __perf_event_mmap
 342          */
 343         if (machine__is_host(machine))
 344                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 345         else
 346                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 347
 348         for (nd = rb_first(&kmaps->maps[MAP__FUNCTION]);
 349              nd; nd = rb_next(nd)) {
 350                 size_t size;
 351                 struct map *pos = rb_entry(nd, struct map, rb_node);
 352
 353                 if (pos->dso->kernel)
 354                         continue;
 355
 356                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 357                 event->mmap.header.type = PERF_RECORD_MMAP;
 358                 event->mmap.header.size = (sizeof(event->mmap) -
 359                                         (sizeof(event->mmap.filename) - size));
 360                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 361                 event->mmap.header.size += machine->id_hdr_size;
 362                 event->mmap.start = pos->start;
 363                 event->mmap.len   = pos->end - pos->start;
 364                 event->mmap.pid   = machine->pid;
 365
 366                 memcpy(event->mmap.filename, pos->dso->long_name,
 367                        pos->dso->long_name_len + 1);
 368                 if (process(tool, event, &synth_sample, machine) != 0) {
 369                         rc = -1;
 370                         break;
 371                 }
 372         }
 373
 374         free(event);
 375         return rc;
 376 }
 377
 378 static int __event__synthesize_thread(union perf_event *comm_event,
 379                                       union perf_event *mmap_event,
 380                                       union perf_event *fork_event,
 381                                       pid_t pid, int full,
 382                                           perf_event__handler_t process,
 383                                       struct perf_tool *tool,
 384                                       struct machine *machine, bool mmap_data)
 385 {
 386         char filename[PATH_MAX];
 387         DIR *tasks;
 388         struct dirent dirent, *next;
 389         pid_t tgid, ppid;
 390         int rc = 0;
 391
 392         /* special case: only send one comm event using passed in pid */
 393         if (!full) {
 394                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 395                                                    process, machine);
 396
 397                 if (tgid == -1)
 398                         return -1;
 399
 400                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 401                                                           process, machine, mmap_data);
 402         }
 403
 404         if (machine__is_default_guest(machine))
 405                 return 0;
 406
 407         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 408                  machine->root_dir, pid);
 409
 410         tasks = opendir(filename);
 411         if (tasks == NULL) {
 412                 pr_debug("couldn't open %s\n", filename);
 413                 return 0;
 414         }
 415
 416         while (!readdir_r(tasks, &dirent, &next) && next) {
 417                 char *end;
 418                 pid_t _pid;
 419
 420                 _pid = strtol(dirent.d_name, &end, 10);
 421                 if (*end)
 422                         continue;
 423
 424                 rc = -1;
 425                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 426                                              &tgid, &ppid) != 0)
 427                         break;
 428
 429                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 430                                                 ppid, process, machine) < 0)
 431                         break;
 432                 /*
 433                  * Send the prepared comm event
 434                  */
 435                 if (process(tool, comm_event, &synth_sample, machine) != 0)
 436                         break;
 437
 438                 rc = 0;
 439                 if (_pid == pid) {
 440                         /* process the parent's maps too */
 441                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 442                                                 process, machine, mmap_data);
 443                         if (rc)
 444                                 break;
 445                 }
 446         }
 447
 448         closedir(tasks);
 449         return rc;
 450 }
 451
 452 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 453                                       struct thread_map *threads,
 454                                       perf_event__handler_t process,
 455                                       struct machine *machine,
 456                                       bool mmap_data)
 457 {
 458         union perf_event *comm_event, *mmap_event, *fork_event;
 459         int err = -1, thread, j;
 460
 461         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 462         if (comm_event == NULL)
 463                 goto out;
 464
 465         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 466         if (mmap_event == NULL)
 467                 goto out_free_comm;
 468
 469         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 470         if (fork_event == NULL)
 471                 goto out_free_mmap;
 472
 473         err = 0;
 474         for (thread = 0; thread < threads->nr; ++thread) {
 475                 if (__event__synthesize_thread(comm_event, mmap_event,
 476                                                fork_event,
 477                                                threads->map[thread], 0,
 478                                                process, tool, machine,
 479                                                mmap_data)) {
 480                         err = -1;
 481                         break;
 482                 }
 483
 484                 /*
 485                  * comm.pid is set to thread group id by
 486                  * perf_event__synthesize_comm
 487                  */
 488                 if ((int) comm_event->comm.pid != threads->map[thread]) {
 489                         bool need_leader = true;
 490
 491                         /* is thread group leader in thread_map? */
 492                         for (j = 0; j < threads->nr; ++j) {
 493                                 if ((int) comm_event->comm.pid == threads->map[j]) {
 494                                         need_leader = false;
 495                                         break;
 496                                 }
 497                         }
 498
 499                         /* if not, generate events for it */
 500                         if (need_leader &&
 501                             __event__synthesize_thread(comm_event, mmap_event,
 502                                                        fork_event,
 503                                                        comm_event->comm.pid, 0,
 504                                                        process, tool, machine,
 505                                                        mmap_data)) {
 506                                 err = -1;
 507                                 break;
 508                         }
 509                 }
 510         }
 511         free(fork_event);
 512 out_free_mmap:
 513         free(mmap_event);
 514 out_free_comm:
 515         free(comm_event);
 516 out:
 517         return err;
 518 }
 519
 520 int perf_event__synthesize_threads(struct perf_tool *tool,
 521                                    perf_event__handler_t process,
 522                                    struct machine *machine, bool mmap_data)
 523 {
 524         DIR *proc;
 525         char proc_path[PATH_MAX];
 526         struct dirent dirent, *next;
 527         union perf_event *comm_event, *mmap_event, *fork_event;
 528         int err = -1;
 529
 530         if (machine__is_default_guest(machine))
 531                 return 0;
 532
 533         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 534         if (comm_event == NULL)
 535                 goto out;
 536
 537         mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
 538         if (mmap_event == NULL)
 539                 goto out_free_comm;
 540
 541         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 542         if (fork_event == NULL)
 543                 goto out_free_mmap;
 544
 545         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 546         proc = opendir(proc_path);
 547
 548         if (proc == NULL)
 549                 goto out_free_fork;
 550
 551         while (!readdir_r(proc, &dirent, &next) && next) {
 552                 char *end;
 553                 pid_t pid = strtol(dirent.d_name, &end, 10);
 554
 555                 if (*end) /* only interested in proper numerical dirents */
 556                         continue;
 557                 /*
 558                  * We may race with exiting thread, so don't stop just because
 559                  * one thread couldn't be synthesized.
 560                  */
 561                 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid,
 562                                            1, process, tool, machine, mmap_data);
 563         }
 564
 565         err = 0;
 566         closedir(proc);
 567 out_free_fork:
 568         free(fork_event);
 569 out_free_mmap:
 570         free(mmap_event);
 571 out_free_comm:
 572         free(comm_event);
 573 out:
 574         return err;
 575 }
 576
 577 struct process_symbol_args {
 578         const char *name;
 579         u64        start;
 580 };
 581
 582 static int find_symbol_cb(void *arg, const char *name, char type,
 583                           u64 start)
 584 {
 585         struct process_symbol_args *args = arg;
 586
 587         /*
 588          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 589          * an 'A' to the same address as "_stext".
 590          */
 591         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 592               type == 'A') || strcmp(name, args->name))
 593                 return 0;
 594
 595         args->start = start;
 596         return 1;
 597 }
 598
 599 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 600                                  const char *symbol_name)
 601 {
 602         struct process_symbol_args args = { .name = symbol_name, };
 603
 604         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 605                 return 0;
 606
 607         return args.start;
 608 }
 609
 610 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 611                                        perf_event__handler_t process,
 612                                        struct machine *machine)
 613 {
 614         size_t size;
 615         const char *mmap_name;
 616         char name_buff[PATH_MAX];
 617         struct map *map;
 618         struct kmap *kmap;
 619         int err;
 620         union perf_event *event;
 621
 622         if (machine->vmlinux_maps[0] == NULL)
 623                 return -1;
 624
 625         /*
 626          * We should get this from /sys/kernel/sections/.text, but till that is
 627          * available use this, and after it is use this as a fallback for older
 628          * kernels.
 629          */
 630         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 631         if (event == NULL) {
 632                 pr_debug("Not enough memory synthesizing mmap event "
 633                          "for kernel modules\n");
 634                 return -1;
 635         }
 636
 637         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 638         if (machine__is_host(machine)) {
 639                 /*
 640                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 641                  * see kernel/perf_event.c __perf_event_mmap
 642                  */
 643                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 644         } else {
 645                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 646         }
 647
 648         map = machine->vmlinux_maps[MAP__FUNCTION];
 649         kmap = map__kmap(map);
 650         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 651                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 652         size = PERF_ALIGN(size, sizeof(u64));
 653         event->mmap.header.type = PERF_RECORD_MMAP;
 654         event->mmap.header.size = (sizeof(event->mmap) -
 655                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 656         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 657         event->mmap.start = map->start;
 658         event->mmap.len   = map->end - event->mmap.start;
 659         event->mmap.pid   = machine->pid;
 660
 661         err = process(tool, event, &synth_sample, machine);
 662         free(event);
 663
 664         return err;
 665 }
 666
 667 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 668 {
 669         const char *s;
 670
 671         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
 672                 s = " exec";
 673         else
 674                 s = "";
 675
 676         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
 677 }
 678
 679 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
 680                              union perf_event *event,
 681                              struct perf_sample *sample,
 682                              struct machine *machine)
 683 {
 684         return machine__process_comm_event(machine, event, sample);
 685 }
 686
 687 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
 688                              union perf_event *event,
 689                              struct perf_sample *sample,
 690                              struct machine *machine)
 691 {
 692         return machine__process_lost_event(machine, event, sample);
 693 }
 694
 695 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 696 {
 697         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
 698                        event->mmap.pid, event->mmap.tid, event->mmap.start,
 699                        event->mmap.len, event->mmap.pgoff,
 700                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
 701                        event->mmap.filename);
 702 }
 703
 704 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
 705 {
 706         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
 707                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
 708                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
 709                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
 710                        event->mmap2.min, event->mmap2.ino,
 711                        event->mmap2.ino_generation,
 712                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
 713                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
 714                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
 715                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
 716                        event->mmap2.filename);
 717 }
 718
 719 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
 720                              union perf_event *event,
 721                              struct perf_sample *sample,
 722                              struct machine *machine)
 723 {
 724         return machine__process_mmap_event(machine, event, sample);
 725 }
 726
 727 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
 728                              union perf_event *event,
 729                              struct perf_sample *sample,
 730                              struct machine *machine)
 731 {
 732         return machine__process_mmap2_event(machine, event, sample);
 733 }
 734
 735 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
 736 {
 737         return fprintf(fp, "(%d:%d):(%d:%d)\n",
 738                        event->fork.pid, event->fork.tid,
 739                        event->fork.ppid, event->fork.ptid);
 740 }
 741
 742 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
 743                              union perf_event *event,
 744                              struct perf_sample *sample,
 745                              struct machine *machine)
 746 {
 747         return machine__process_fork_event(machine, event, sample);
 748 }
 749
 750 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
 751                              union perf_event *event,
 752                              struct perf_sample *sample,
 753                              struct machine *machine)
 754 {
 755         return machine__process_exit_event(machine, event, sample);
 756 }
 757
 758 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
 759 {
 760         size_t ret = fprintf(fp, "PERF_RECORD_%s",
 761                              perf_event__name(event->header.type));
 762
 763         switch (event->header.type) {
 764         case PERF_RECORD_COMM:
 765                 ret += perf_event__fprintf_comm(event, fp);
 766                 break;
 767         case PERF_RECORD_FORK:
 768         case PERF_RECORD_EXIT:
 769                 ret += perf_event__fprintf_task(event, fp);
 770                 break;
 771         case PERF_RECORD_MMAP:
 772                 ret += perf_event__fprintf_mmap(event, fp);
 773                 break;
 774         case PERF_RECORD_MMAP2:
 775                 ret += perf_event__fprintf_mmap2(event, fp);
 776                 break;
 777         default:
 778                 ret += fprintf(fp, "\n");
 779         }
 780
 781         return ret;
 782 }
 783
 784 int perf_event__process(struct perf_tool *tool __maybe_unused,
 785                         union perf_event *event,
 786                         struct perf_sample *sample,
 787                         struct machine *machine)
 788 {
 789         return machine__process_event(machine, event, sample);
 790 }
 791
 792 void thread__find_addr_map(struct thread *thread, u8 cpumode,
 793                            enum map_type type, u64 addr,
 794                            struct addr_location *al)
 795 {
 796         struct map_groups *mg = thread->mg;
 797         struct machine *machine = mg->machine;
 798         bool load_map = false;
 799
 800         al->machine = machine;
 801         al->thread = thread;
 802         al->addr = addr;
 803         al->cpumode = cpumode;
 804         al->filtered = 0;
 805
 806         if (machine == NULL) {
 807                 al->map = NULL;
 808                 return;
 809         }
 810
 811         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
 812                 al->level = 'k';
 813                 mg = &machine->kmaps;
 814                 load_map = true;
 815         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
 816                 al->level = '.';
 817         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 818                 al->level = 'g';
 819                 mg = &machine->kmaps;
 820                 load_map = true;
 821         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
 822                 al->level = 'u';
 823         } else {
 824                 al->level = 'H';
 825                 al->map = NULL;
 826
 827                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
 828                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
 829                         !perf_guest)
 830                         al->filtered |= (1 << HIST_FILTER__GUEST);
 831                 if ((cpumode == PERF_RECORD_MISC_USER ||
 832                         cpumode == PERF_RECORD_MISC_KERNEL) &&
 833                         !perf_host)
 834                         al->filtered |= (1 << HIST_FILTER__HOST);
 835
 836                 return;
 837         }
 838 try_again:
 839         al->map = map_groups__find(mg, type, al->addr);
 840         if (al->map == NULL) {
 841                 /*
 842                  * If this is outside of all known maps, and is a negative
 843                  * address, try to look it up in the kernel dso, as it might be
 844                  * a vsyscall or vdso (which executes in user-mode).
 845                  *
 846                  * XXX This is nasty, we should have a symbol list in the
 847                  * "[vdso]" dso, but for now lets use the old trick of looking
 848                  * in the whole kernel symbol list.
 849                  */
 850                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
 851                     mg != &machine->kmaps &&
 852                     machine__kernel_ip(machine, al->addr)) {
 853                         mg = &machine->kmaps;
 854                         load_map = true;
 855                         goto try_again;
 856                 }
 857         } else {
 858                 /*
 859                  * Kernel maps might be changed when loading symbols so loading
 860                  * must be done prior to using kernel maps.
 861                  */
 862                 if (load_map)
 863                         map__load(al->map, machine->symbol_filter);
 864                 al->addr = al->map->map_ip(al->map, al->addr);
 865         }
 866 }
 867
 868 void thread__find_addr_location(struct thread *thread,
 869                                 u8 cpumode, enum map_type type, u64 addr,
 870                                 struct addr_location *al)
 871 {
 872         thread__find_addr_map(thread, cpumode, type, addr, al);
 873         if (al->map != NULL)
 874                 al->sym = map__find_symbol(al->map, al->addr,
 875                                            thread->mg->machine->symbol_filter);
 876         else
 877                 al->sym = NULL;
 878 }
 879
 880 int perf_event__preprocess_sample(const union perf_event *event,
 881                                   struct machine *machine,
 882                                   struct addr_location *al,
 883                                   struct perf_sample *sample)
 884 {
 885         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 886         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 887                                                         sample->tid);
 888
 889         if (thread == NULL)
 890                 return -1;
 891
 892         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
 893         /*
 894          * Have we already created the kernel maps for this machine?
 895          *
 896          * This should have happened earlier, when we processed the kernel MMAP
 897          * events, but for older perf.data files there was no such thing, so do
 898          * it now.
 899          */
 900         if (cpumode == PERF_RECORD_MISC_KERNEL &&
 901             machine->vmlinux_maps[MAP__FUNCTION] == NULL)
 902                 machine__create_kernel_maps(machine);
 903
 904         thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al);
 905         dump_printf(" ...... dso: %s\n",
 906                     al->map ? al->map->dso->long_name :
 907                         al->level == 'H' ? "[hypervisor]" : "<not found>");
 908
 909         if (thread__is_filtered(thread))
 910                 al->filtered |= (1 << HIST_FILTER__THREAD);
 911
 912         al->sym = NULL;
 913         al->cpu = sample->cpu;
 914
 915         if (al->map) {
 916                 struct dso *dso = al->map->dso;
 917
 918                 if (symbol_conf.dso_list &&
 919                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
 920                                                   dso->short_name) ||
 921                                (dso->short_name != dso->long_name &&
 922                                 strlist__has_entry(symbol_conf.dso_list,
 923                                                    dso->long_name))))) {
 924                         al->filtered |= (1 << HIST_FILTER__DSO);
 925                 }
 926
 927                 al->sym = map__find_symbol(al->map, al->addr,
 928                                            machine->symbol_filter);
 929         }
 930
 931         if (symbol_conf.sym_list &&
 932                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
 933                                                 al->sym->name))) {
 934                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
 935         }
 936
 937         return 0;
 938 }
 939
 940 bool is_bts_event(struct perf_event_attr *attr)
 941 {
 942         return attr->type == PERF_TYPE_HARDWARE &&
 943                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
 944                attr->sample_period == 1;
 945 }
 946
 947 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 948 {
 949         if (attr->type == PERF_TYPE_SOFTWARE &&
 950             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
 951              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
 952              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
 953                 return true;
 954
 955         if (is_bts_event(attr))
 956                 return true;
 957
 958         return false;
 959 }
 960
 961 void perf_event__preprocess_sample_addr(union perf_event *event,
 962                                         struct perf_sample *sample,
 963                                         struct thread *thread,
 964                                         struct addr_location *al)
 965 {
 966         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 967
 968         thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al);
 969         if (!al->map)
 970                 thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
 971                                       sample->addr, al);
 972
 973         al->cpu = sample->cpu;
 974         al->sym = NULL;
 975
 976         if (al->map)
 977                 al->sym = map__find_symbol(al->map, al->addr, NULL);
 978 }