tools/perf/util/event.c

   1 #include <dirent.h>
   2 #include <errno.h>
   3 #include <inttypes.h>
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <unistd.h>
   9 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  10 #include <api/fs/fs.h>
  11 #include "event.h"
  12 #include "debug.h"
  13 #include "hist.h"
  14 #include "machine.h"
  15 #include "sort.h"
  16 #include "string2.h"
  17 #include "strlist.h"
  18 #include "thread.h"
  19 #include "thread_map.h"
  20 #include "sane_ctype.h"
  21 #include "symbol/kallsyms.h"
  22 #include "asm/bug.h"
  23 #include "stat.h"
  24
  25 static const char *perf_event__names[] = {
  26         [0]                                     = "TOTAL",
  27         [PERF_RECORD_MMAP]                      = "MMAP",
  28         [PERF_RECORD_MMAP2]                     = "MMAP2",
  29         [PERF_RECORD_LOST]                      = "LOST",
  30         [PERF_RECORD_COMM]                      = "COMM",
  31         [PERF_RECORD_EXIT]                      = "EXIT",
  32         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  33         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  34         [PERF_RECORD_FORK]                      = "FORK",
  35         [PERF_RECORD_READ]                      = "READ",
  36         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  37         [PERF_RECORD_AUX]                       = "AUX",
  38         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  39         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  40         [PERF_RECORD_SWITCH]                    = "SWITCH",
  41         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  42         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  43         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  44         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  45         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  46         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  47         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  48         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  49         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  50         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  51         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  52         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  53         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  54         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  55         [PERF_RECORD_STAT]                      = "STAT",
  56         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  57         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  58         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  59 };
  60
  61 static const char *perf_ns__names[] = {
  62         [NET_NS_INDEX]          = "net",
  63         [UTS_NS_INDEX]          = "uts",
  64         [IPC_NS_INDEX]          = "ipc",
  65         [PID_NS_INDEX]          = "pid",
  66         [USER_NS_INDEX]         = "user",
  67         [MNT_NS_INDEX]          = "mnt",
  68         [CGROUP_NS_INDEX]       = "cgroup",
  69 };
  70
  71 const char *perf_event__name(unsigned int id)
  72 {
  73         if (id >= ARRAY_SIZE(perf_event__names))
  74                 return "INVALID";
  75         if (!perf_event__names[id])
  76                 return "UNKNOWN";
  77         return perf_event__names[id];
  78 }
  79
  80 static const char *perf_ns__name(unsigned int id)
  81 {
  82         if (id >= ARRAY_SIZE(perf_ns__names))
  83                 return "UNKNOWN";
  84         return perf_ns__names[id];
  85 }
  86
  87 static int perf_tool__process_synth_event(struct perf_tool *tool,
  88                                           union perf_event *event,
  89                                           struct machine *machine,
  90                                           perf_event__handler_t process)
  91 {
  92         struct perf_sample synth_sample = {
  93         .pid       = -1,
  94         .tid       = -1,
  95         .time      = -1,
  96         .stream_id = -1,
  97         .cpu       = -1,
  98         .period    = 1,
  99         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 100         };
 101
 102         return process(tool, event, &synth_sample, machine);
 103 };
 104
 105 /*
 106  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 107  * the comm, tgid and ppid.
 108  */
 109 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 110                                     pid_t *tgid, pid_t *ppid)
 111 {
 112         char filename[PATH_MAX];
 113         char bf[4096];
 114         int fd;
 115         size_t size = 0;
 116         ssize_t n;
 117         char *name, *tgids, *ppids;
 118
 119         *tgid = -1;
 120         *ppid = -1;
 121
 122         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 123
 124         fd = open(filename, O_RDONLY);
 125         if (fd < 0) {
 126                 pr_debug("couldn't open %s\n", filename);
 127                 return -1;
 128         }
 129
 130         n = read(fd, bf, sizeof(bf) - 1);
 131         close(fd);
 132         if (n <= 0) {
 133                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 134                            pid);
 135                 return -1;
 136         }
 137         bf[n] = '\0';
 138
 139         name = strstr(bf, "Name:");
 140         tgids = strstr(bf, "Tgid:");
 141         ppids = strstr(bf, "PPid:");
 142
 143         if (name) {
 144                 char *nl;
 145
 146                 name += 5;  /* strlen("Name:") */
 147                 name = ltrim(name);
 148
 149                 nl = strchr(name, '\n');
 150                 if (nl)
 151                         *nl = '\0';
 152
 153                 size = strlen(name);
 154                 if (size >= len)
 155                         size = len - 1;
 156                 memcpy(comm, name, size);
 157                 comm[size] = '\0';
 158         } else {
 159                 pr_debug("Name: string not found for pid %d\n", pid);
 160         }
 161
 162         if (tgids) {
 163                 tgids += 5;  /* strlen("Tgid:") */
 164                 *tgid = atoi(tgids);
 165         } else {
 166                 pr_debug("Tgid: string not found for pid %d\n", pid);
 167         }
 168
 169         if (ppids) {
 170                 ppids += 5;  /* strlen("PPid:") */
 171                 *ppid = atoi(ppids);
 172         } else {
 173                 pr_debug("PPid: string not found for pid %d\n", pid);
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 180                                     struct machine *machine,
 181                                     pid_t *tgid, pid_t *ppid)
 182 {
 183         size_t size;
 184
 185         *ppid = -1;
 186
 187         memset(&event->comm, 0, sizeof(event->comm));
 188
 189         if (machine__is_host(machine)) {
 190                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 191                                              sizeof(event->comm.comm),
 192                                              tgid, ppid) != 0) {
 193                         return -1;
 194                 }
 195         } else {
 196                 *tgid = machine->pid;
 197         }
 198
 199         if (*tgid < 0)
 200                 return -1;
 201
 202         event->comm.pid = *tgid;
 203         event->comm.header.type = PERF_RECORD_COMM;
 204
 205         size = strlen(event->comm.comm) + 1;
 206         size = PERF_ALIGN(size, sizeof(u64));
 207         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 208         event->comm.header.size = (sizeof(event->comm) -
 209                                 (sizeof(event->comm.comm) - size) +
 210                                 machine->id_hdr_size);
 211         event->comm.tid = pid;
 212
 213         return 0;
 214 }
 215
 216 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 217                                          union perf_event *event, pid_t pid,
 218                                          perf_event__handler_t process,
 219                                          struct machine *machine)
 220 {
 221         pid_t tgid, ppid;
 222
 223         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 224                 return -1;
 225
 226         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 227                 return -1;
 228
 229         return tgid;
 230 }
 231
 232 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 233                                          struct perf_ns_link_info *ns_link_info)
 234 {
 235         struct stat64 st;
 236         char proc_ns[128];
 237
 238         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 239         if (stat64(proc_ns, &st) == 0) {
 240                 ns_link_info->dev = st.st_dev;
 241                 ns_link_info->ino = st.st_ino;
 242         }
 243 }
 244
 245 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 246                                       union perf_event *event,
 247                                       pid_t pid, pid_t tgid,
 248                                       perf_event__handler_t process,
 249                                       struct machine *machine)
 250 {
 251         u32 idx;
 252         struct perf_ns_link_info *ns_link_info;
 253
 254         if (!tool || !tool->namespace_events)
 255                 return 0;
 256
 257         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 258                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 259                machine->id_hdr_size));
 260
 261         event->namespaces.pid = tgid;
 262         event->namespaces.tid = pid;
 263
 264         event->namespaces.nr_namespaces = NR_NAMESPACES;
 265
 266         ns_link_info = event->namespaces.link_info;
 267
 268         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 269                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 270                                              &ns_link_info[idx]);
 271
 272         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 273
 274         event->namespaces.header.size = (sizeof(event->namespaces) +
 275                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 276                         machine->id_hdr_size);
 277
 278         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 279                 return -1;
 280
 281         return 0;
 282 }
 283
 284 static int perf_event__synthesize_fork(struct perf_tool *tool,
 285                                        union perf_event *event,
 286                                        pid_t pid, pid_t tgid, pid_t ppid,
 287                                        perf_event__handler_t process,
 288                                        struct machine *machine)
 289 {
 290         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 291
 292         /*
 293          * for main thread set parent to ppid from status file. For other
 294          * threads set parent pid to main thread. ie., assume main thread
 295          * spawns all threads in a process
 296         */
 297         if (tgid == pid) {
 298                 event->fork.ppid = ppid;
 299                 event->fork.ptid = ppid;
 300         } else {
 301                 event->fork.ppid = tgid;
 302                 event->fork.ptid = tgid;
 303         }
 304         event->fork.pid  = tgid;
 305         event->fork.tid  = pid;
 306         event->fork.header.type = PERF_RECORD_FORK;
 307
 308         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 309
 310         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 311                 return -1;
 312
 313         return 0;
 314 }
 315
 316 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 317                                        union perf_event *event,
 318                                        pid_t pid, pid_t tgid,
 319                                        perf_event__handler_t process,
 320                                        struct machine *machine,
 321                                        bool mmap_data,
 322                                        unsigned int proc_map_timeout)
 323 {
 324         char filename[PATH_MAX];
 325         FILE *fp;
 326         unsigned long long t;
 327         bool truncation = false;
 328         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 329         int rc = 0;
 330         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 331         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 332
 333         if (machine__is_default_guest(machine))
 334                 return 0;
 335
 336         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 337                  machine->root_dir, pid, pid);
 338
 339         fp = fopen(filename, "r");
 340         if (fp == NULL) {
 341                 /*
 342                  * We raced with a task exiting - just return:
 343                  */
 344                 pr_debug("couldn't open %s\n", filename);
 345                 return -1;
 346         }
 347
 348         event->header.type = PERF_RECORD_MMAP2;
 349         t = rdclock();
 350
 351         while (1) {
 352                 char bf[BUFSIZ];
 353                 char prot[5];
 354                 char execname[PATH_MAX];
 355                 char anonstr[] = "//anon";
 356                 unsigned int ino;
 357                 size_t size;
 358                 ssize_t n;
 359
 360                 if (fgets(bf, sizeof(bf), fp) == NULL)
 361                         break;
 362
 363                 if ((rdclock() - t) > timeout) {
 364                         pr_warning("Reading %s time out. "
 365                                    "You may want to increase "
 366                                    "the time limit by --proc-map-timeout\n",
 367                                    filename);
 368                         truncation = true;
 369                         goto out;
 370                 }
 371
 372                 /* ensure null termination since stack will be reused. */
 373                 strcpy(execname, "");
 374
 375                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 376                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 377                        &event->mmap2.start, &event->mmap2.len, prot,
 378                        &event->mmap2.pgoff, &event->mmap2.maj,
 379                        &event->mmap2.min,
 380                        &ino, execname);
 381
 382                 /*
 383                  * Anon maps don't have the execname.
 384                  */
 385                 if (n < 7)
 386                         continue;
 387
 388                 event->mmap2.ino = (u64)ino;
 389
 390                 /*
 391                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 392                  */
 393                 if (machine__is_host(machine))
 394                         event->header.misc = PERF_RECORD_MISC_USER;
 395                 else
 396                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 397
 398                 /* map protection and flags bits */
 399                 event->mmap2.prot = 0;
 400                 event->mmap2.flags = 0;
 401                 if (prot[0] == 'r')
 402                         event->mmap2.prot |= PROT_READ;
 403                 if (prot[1] == 'w')
 404                         event->mmap2.prot |= PROT_WRITE;
 405                 if (prot[2] == 'x')
 406                         event->mmap2.prot |= PROT_EXEC;
 407
 408                 if (prot[3] == 's')
 409                         event->mmap2.flags |= MAP_SHARED;
 410                 else
 411                         event->mmap2.flags |= MAP_PRIVATE;
 412
 413                 if (prot[2] != 'x') {
 414                         if (!mmap_data || prot[0] != 'r')
 415                                 continue;
 416
 417                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 418                 }
 419
 420 out:
 421                 if (truncation)
 422                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 423
 424                 if (!strcmp(execname, ""))
 425                         strcpy(execname, anonstr);
 426
 427                 if (hugetlbfs_mnt_len &&
 428                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 429                         strcpy(execname, anonstr);
 430                         event->mmap2.flags |= MAP_HUGETLB;
 431                 }
 432
 433                 size = strlen(execname) + 1;
 434                 memcpy(event->mmap2.filename, execname, size);
 435                 size = PERF_ALIGN(size, sizeof(u64));
 436                 event->mmap2.len -= event->mmap.start;
 437                 event->mmap2.header.size = (sizeof(event->mmap2) -
 438                                         (sizeof(event->mmap2.filename) - size));
 439                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 440                 event->mmap2.header.size += machine->id_hdr_size;
 441                 event->mmap2.pid = tgid;
 442                 event->mmap2.tid = pid;
 443
 444                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 445                         rc = -1;
 446                         break;
 447                 }
 448
 449                 if (truncation)
 450                         break;
 451         }
 452
 453         fclose(fp);
 454         return rc;
 455 }
 456
 457 int perf_event__synthesize_modules(struct perf_tool *tool,
 458                                    perf_event__handler_t process,
 459                                    struct machine *machine)
 460 {
 461         int rc = 0;
 462         struct map *pos;
 463         struct map_groups *kmaps = &machine->kmaps;
 464         struct maps *maps = &kmaps->maps[MAP__FUNCTION];
 465         union perf_event *event = zalloc((sizeof(event->mmap) +
 466                                           machine->id_hdr_size));
 467         if (event == NULL) {
 468                 pr_debug("Not enough memory synthesizing mmap event "
 469                          "for kernel modules\n");
 470                 return -1;
 471         }
 472
 473         event->header.type = PERF_RECORD_MMAP;
 474
 475         /*
 476          * kernel uses 0 for user space maps, see kernel/perf_event.c
 477          * __perf_event_mmap
 478          */
 479         if (machine__is_host(machine))
 480                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 481         else
 482                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 483
 484         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 485                 size_t size;
 486
 487                 if (__map__is_kernel(pos))
 488                         continue;
 489
 490                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 491                 event->mmap.header.type = PERF_RECORD_MMAP;
 492                 event->mmap.header.size = (sizeof(event->mmap) -
 493                                         (sizeof(event->mmap.filename) - size));
 494                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 495                 event->mmap.header.size += machine->id_hdr_size;
 496                 event->mmap.start = pos->start;
 497                 event->mmap.len   = pos->end - pos->start;
 498                 event->mmap.pid   = machine->pid;
 499
 500                 memcpy(event->mmap.filename, pos->dso->long_name,
 501                        pos->dso->long_name_len + 1);
 502                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 503                         rc = -1;
 504                         break;
 505                 }
 506         }
 507
 508         free(event);
 509         return rc;
 510 }
 511
 512 static int __event__synthesize_thread(union perf_event *comm_event,
 513                                       union perf_event *mmap_event,
 514                                       union perf_event *fork_event,
 515                                       union perf_event *namespaces_event,
 516                                       pid_t pid, int full,
 517                                       perf_event__handler_t process,
 518                                       struct perf_tool *tool,
 519                                       struct machine *machine,
 520                                       bool mmap_data,
 521                                       unsigned int proc_map_timeout)
 522 {
 523         char filename[PATH_MAX];
 524         DIR *tasks;
 525         struct dirent *dirent;
 526         pid_t tgid, ppid;
 527         int rc = 0;
 528
 529         /* special case: only send one comm event using passed in pid */
 530         if (!full) {
 531                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 532                                                    process, machine);
 533
 534                 if (tgid == -1)
 535                         return -1;
 536
 537                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 538                                                       tgid, process, machine) < 0)
 539                         return -1;
 540
 541
 542                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 543                                                           process, machine, mmap_data,
 544                                                           proc_map_timeout);
 545         }
 546
 547         if (machine__is_default_guest(machine))
 548                 return 0;
 549
 550         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 551                  machine->root_dir, pid);
 552
 553         tasks = opendir(filename);
 554         if (tasks == NULL) {
 555                 pr_debug("couldn't open %s\n", filename);
 556                 return 0;
 557         }
 558
 559         while ((dirent = readdir(tasks)) != NULL) {
 560                 char *end;
 561                 pid_t _pid;
 562
 563                 _pid = strtol(dirent->d_name, &end, 10);
 564                 if (*end)
 565                         continue;
 566
 567                 rc = -1;
 568                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 569                                              &tgid, &ppid) != 0)
 570                         break;
 571
 572                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 573                                                 ppid, process, machine) < 0)
 574                         break;
 575
 576                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 577                                                       tgid, process, machine) < 0)
 578                         break;
 579
 580                 /*
 581                  * Send the prepared comm event
 582                  */
 583                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 584                         break;
 585
 586                 rc = 0;
 587                 if (_pid == pid) {
 588                         /* process the parent's maps too */
 589                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 590                                                 process, machine, mmap_data, proc_map_timeout);
 591                         if (rc)
 592                                 break;
 593                 }
 594         }
 595
 596         closedir(tasks);
 597         return rc;
 598 }
 599
 600 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 601                                       struct thread_map *threads,
 602                                       perf_event__handler_t process,
 603                                       struct machine *machine,
 604                                       bool mmap_data,
 605                                       unsigned int proc_map_timeout)
 606 {
 607         union perf_event *comm_event, *mmap_event, *fork_event;
 608         union perf_event *namespaces_event;
 609         int err = -1, thread, j;
 610
 611         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 612         if (comm_event == NULL)
 613                 goto out;
 614
 615         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 616         if (mmap_event == NULL)
 617                 goto out_free_comm;
 618
 619         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 620         if (fork_event == NULL)
 621                 goto out_free_mmap;
 622
 623         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 624                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 625                                   machine->id_hdr_size);
 626         if (namespaces_event == NULL)
 627                 goto out_free_fork;
 628
 629         err = 0;
 630         for (thread = 0; thread < threads->nr; ++thread) {
 631                 if (__event__synthesize_thread(comm_event, mmap_event,
 632                                                fork_event, namespaces_event,
 633                                                thread_map__pid(threads, thread), 0,
 634                                                process, tool, machine,
 635                                                mmap_data, proc_map_timeout)) {
 636                         err = -1;
 637                         break;
 638                 }
 639
 640                 /*
 641                  * comm.pid is set to thread group id by
 642                  * perf_event__synthesize_comm
 643                  */
 644                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 645                         bool need_leader = true;
 646
 647                         /* is thread group leader in thread_map? */
 648                         for (j = 0; j < threads->nr; ++j) {
 649                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 650                                         need_leader = false;
 651                                         break;
 652                                 }
 653                         }
 654
 655                         /* if not, generate events for it */
 656                         if (need_leader &&
 657                             __event__synthesize_thread(comm_event, mmap_event,
 658                                                        fork_event, namespaces_event,
 659                                                        comm_event->comm.pid, 0,
 660                                                        process, tool, machine,
 661                                                        mmap_data, proc_map_timeout)) {
 662                                 err = -1;
 663                                 break;
 664                         }
 665                 }
 666         }
 667         free(namespaces_event);
 668 out_free_fork:
 669         free(fork_event);
 670 out_free_mmap:
 671         free(mmap_event);
 672 out_free_comm:
 673         free(comm_event);
 674 out:
 675         return err;
 676 }
 677
 678 int perf_event__synthesize_threads(struct perf_tool *tool,
 679                                    perf_event__handler_t process,
 680                                    struct machine *machine,
 681                                    bool mmap_data,
 682                                    unsigned int proc_map_timeout)
 683 {
 684         DIR *proc;
 685         char proc_path[PATH_MAX];
 686         struct dirent *dirent;
 687         union perf_event *comm_event, *mmap_event, *fork_event;
 688         union perf_event *namespaces_event;
 689         int err = -1;
 690
 691         if (machine__is_default_guest(machine))
 692                 return 0;
 693
 694         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 695         if (comm_event == NULL)
 696                 goto out;
 697
 698         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 699         if (mmap_event == NULL)
 700                 goto out_free_comm;
 701
 702         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 703         if (fork_event == NULL)
 704                 goto out_free_mmap;
 705
 706         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 707                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 708                                   machine->id_hdr_size);
 709         if (namespaces_event == NULL)
 710                 goto out_free_fork;
 711
 712         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 713         proc = opendir(proc_path);
 714
 715         if (proc == NULL)
 716                 goto out_free_namespaces;
 717
 718         while ((dirent = readdir(proc)) != NULL) {
 719                 char *end;
 720                 pid_t pid = strtol(dirent->d_name, &end, 10);
 721
 722                 if (*end) /* only interested in proper numerical dirents */
 723                         continue;
 724                 /*
 725                  * We may race with exiting thread, so don't stop just because
 726                  * one thread couldn't be synthesized.
 727                  */
 728                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 729                                            namespaces_event, pid, 1, process,
 730                                            tool, machine, mmap_data,
 731                                            proc_map_timeout);
 732         }
 733
 734         err = 0;
 735         closedir(proc);
 736 out_free_namespaces:
 737         free(namespaces_event);
 738 out_free_fork:
 739         free(fork_event);
 740 out_free_mmap:
 741         free(mmap_event);
 742 out_free_comm:
 743         free(comm_event);
 744 out:
 745         return err;
 746 }
 747
 748 struct process_symbol_args {
 749         const char *name;
 750         u64        start;
 751 };
 752
 753 static int find_symbol_cb(void *arg, const char *name, char type,
 754                           u64 start)
 755 {
 756         struct process_symbol_args *args = arg;
 757
 758         /*
 759          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 760          * an 'A' to the same address as "_stext".
 761          */
 762         if (!(symbol_type__is_a(type, MAP__FUNCTION) ||
 763               type == 'A') || strcmp(name, args->name))
 764                 return 0;
 765
 766         args->start = start;
 767         return 1;
 768 }
 769
 770 u64 kallsyms__get_function_start(const char *kallsyms_filename,
 771                                  const char *symbol_name)
 772 {
 773         struct process_symbol_args args = { .name = symbol_name, };
 774
 775         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 776                 return 0;
 777
 778         return args.start;
 779 }
 780
 781 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 782                                        perf_event__handler_t process,
 783                                        struct machine *machine)
 784 {
 785         size_t size;
 786         const char *mmap_name;
 787         char name_buff[PATH_MAX];
 788         struct map *map = machine__kernel_map(machine);
 789         struct kmap *kmap;
 790         int err;
 791         union perf_event *event;
 792
 793         if (symbol_conf.kptr_restrict)
 794                 return -1;
 795         if (map == NULL)
 796                 return -1;
 797
 798         /*
 799          * We should get this from /sys/kernel/sections/.text, but till that is
 800          * available use this, and after it is use this as a fallback for older
 801          * kernels.
 802          */
 803         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 804         if (event == NULL) {
 805                 pr_debug("Not enough memory synthesizing mmap event "
 806                          "for kernel modules\n");
 807                 return -1;
 808         }
 809
 810         mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
 811         if (machine__is_host(machine)) {
 812                 /*
 813                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 814                  * see kernel/perf_event.c __perf_event_mmap
 815                  */
 816                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 817         } else {
 818                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 819         }
 820
 821         kmap = map__kmap(map);
 822         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 823                         "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1;
 824         size = PERF_ALIGN(size, sizeof(u64));
 825         event->mmap.header.type = PERF_RECORD_MMAP;
 826         event->mmap.header.size = (sizeof(event->mmap) -
 827                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 828         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 829         event->mmap.start = map->start;
 830         event->mmap.len   = map->end - event->mmap.start;
 831         event->mmap.pid   = machine->pid;
 832
 833         err = perf_tool__process_synth_event(tool, event, machine, process);
 834         free(event);
 835
 836         return err;
 837 }
 838
 839 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 840                                       struct thread_map *threads,
 841                                       perf_event__handler_t process,
 842                                       struct machine *machine)
 843 {
 844         union perf_event *event;
 845         int i, err, size;
 846
 847         size  = sizeof(event->thread_map);
 848         size += threads->nr * sizeof(event->thread_map.entries[0]);
 849
 850         event = zalloc(size);
 851         if (!event)
 852                 return -ENOMEM;
 853
 854         event->header.type = PERF_RECORD_THREAD_MAP;
 855         event->header.size = size;
 856         event->thread_map.nr = threads->nr;
 857
 858         for (i = 0; i < threads->nr; i++) {
 859                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 860                 char *comm = thread_map__comm(threads, i);
 861
 862                 if (!comm)
 863                         comm = (char *) "";
 864
 865                 entry->pid = thread_map__pid(threads, i);
 866                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 867         }
 868
 869         err = process(tool, event, NULL, machine);
 870
 871         free(event);
 872         return err;
 873 }
 874
 875 static void synthesize_cpus(struct cpu_map_entries *cpus,
 876                             struct cpu_map *map)
 877 {
 878         int i;
 879
 880         cpus->nr = map->nr;
 881
 882         for (i = 0; i < map->nr; i++)
 883                 cpus->cpu[i] = map->map[i];
 884 }
 885
 886 static void synthesize_mask(struct cpu_map_mask *mask,
 887                             struct cpu_map *map, int max)
 888 {
 889         int i;
 890
 891         mask->nr = BITS_TO_LONGS(max);
 892         mask->long_size = sizeof(long);
 893
 894         for (i = 0; i < map->nr; i++)
 895                 set_bit(map->map[i], mask->mask);
 896 }
 897
 898 static size_t cpus_size(struct cpu_map *map)
 899 {
 900         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
 901 }
 902
 903 static size_t mask_size(struct cpu_map *map, int *max)
 904 {
 905         int i;
 906
 907         *max = 0;
 908
 909         for (i = 0; i < map->nr; i++) {
 910                 /* bit possition of the cpu is + 1 */
 911                 int bit = map->map[i] + 1;
 912
 913                 if (bit > *max)
 914                         *max = bit;
 915         }
 916
 917         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
 918 }
 919
 920 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
 921 {
 922         size_t size_cpus, size_mask;
 923         bool is_dummy = cpu_map__empty(map);
 924
 925         /*
 926          * Both array and mask data have variable size based
 927          * on the number of cpus and their actual values.
 928          * The size of the 'struct cpu_map_data' is:
 929          *
 930          *   array = size of 'struct cpu_map_entries' +
 931          *           number of cpus * sizeof(u64)
 932          *
 933          *   mask  = size of 'struct cpu_map_mask' +
 934          *           maximum cpu bit converted to size of longs
 935          *
 936          * and finaly + the size of 'struct cpu_map_data'.
 937          */
 938         size_cpus = cpus_size(map);
 939         size_mask = mask_size(map, max);
 940
 941         if (is_dummy || (size_cpus < size_mask)) {
 942                 *size += size_cpus;
 943                 *type  = PERF_CPU_MAP__CPUS;
 944         } else {
 945                 *size += size_mask;
 946                 *type  = PERF_CPU_MAP__MASK;
 947         }
 948
 949         *size += sizeof(struct cpu_map_data);
 950         return zalloc(*size);
 951 }
 952
 953 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
 954                               u16 type, int max)
 955 {
 956         data->type = type;
 957
 958         switch (type) {
 959         case PERF_CPU_MAP__CPUS:
 960                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
 961                 break;
 962         case PERF_CPU_MAP__MASK:
 963                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
 964         default:
 965                 break;
 966         };
 967 }
 968
 969 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
 970 {
 971         size_t size = sizeof(struct cpu_map_event);
 972         struct cpu_map_event *event;
 973         int max;
 974         u16 type;
 975
 976         event = cpu_map_data__alloc(map, &size, &type, &max);
 977         if (!event)
 978                 return NULL;
 979
 980         event->header.type = PERF_RECORD_CPU_MAP;
 981         event->header.size = size;
 982         event->data.type   = type;
 983
 984         cpu_map_data__synthesize(&event->data, map, type, max);
 985         return event;
 986 }
 987
 988 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
 989                                    struct cpu_map *map,
 990                                    perf_event__handler_t process,
 991                                    struct machine *machine)
 992 {
 993         struct cpu_map_event *event;
 994         int err;
 995
 996         event = cpu_map_event__new(map);
 997         if (!event)
 998                 return -ENOMEM;
 999
1000         err = process(tool, (union perf_event *) event, NULL, machine);
1001
1002         free(event);
1003         return err;
1004 }
1005
1006 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1007                                        struct perf_stat_config *config,
1008                                        perf_event__handler_t process,
1009                                        struct machine *machine)
1010 {
1011         struct stat_config_event *event;
1012         int size, i = 0, err;
1013
1014         size  = sizeof(*event);
1015         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1016
1017         event = zalloc(size);
1018         if (!event)
1019                 return -ENOMEM;
1020
1021         event->header.type = PERF_RECORD_STAT_CONFIG;
1022         event->header.size = size;
1023         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1024
1025 #define ADD(__term, __val)                                      \
1026         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1027         event->data[i].val = __val;                             \
1028         i++;
1029
1030         ADD(AGGR_MODE,  config->aggr_mode)
1031         ADD(INTERVAL,   config->interval)
1032         ADD(SCALE,      config->scale)
1033
1034         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1035                   "stat config terms unbalanced\n");
1036 #undef ADD
1037
1038         err = process(tool, (union perf_event *) event, NULL, machine);
1039
1040         free(event);
1041         return err;
1042 }
1043
1044 int perf_event__synthesize_stat(struct perf_tool *tool,
1045                                 u32 cpu, u32 thread, u64 id,
1046                                 struct perf_counts_values *count,
1047                                 perf_event__handler_t process,
1048                                 struct machine *machine)
1049 {
1050         struct stat_event event;
1051
1052         event.header.type = PERF_RECORD_STAT;
1053         event.header.size = sizeof(event);
1054         event.header.misc = 0;
1055
1056         event.id        = id;
1057         event.cpu       = cpu;
1058         event.thread    = thread;
1059         event.val       = count->val;
1060         event.ena       = count->ena;
1061         event.run       = count->run;
1062
1063         return process(tool, (union perf_event *) &event, NULL, machine);
1064 }
1065
1066 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1067                                       u64 evtime, u64 type,
1068                                       perf_event__handler_t process,
1069                                       struct machine *machine)
1070 {
1071         struct stat_round_event event;
1072
1073         event.header.type = PERF_RECORD_STAT_ROUND;
1074         event.header.size = sizeof(event);
1075         event.header.misc = 0;
1076
1077         event.time = evtime;
1078         event.type = type;
1079
1080         return process(tool, (union perf_event *) &event, NULL, machine);
1081 }
1082
1083 void perf_event__read_stat_config(struct perf_stat_config *config,
1084                                   struct stat_config_event *event)
1085 {
1086         unsigned i;
1087
1088         for (i = 0; i < event->nr; i++) {
1089
1090                 switch (event->data[i].tag) {
1091 #define CASE(__term, __val)                                     \
1092                 case PERF_STAT_CONFIG_TERM__##__term:           \
1093                         config->__val = event->data[i].val;     \
1094                         break;
1095
1096                 CASE(AGGR_MODE, aggr_mode)
1097                 CASE(SCALE,     scale)
1098                 CASE(INTERVAL,  interval)
1099 #undef CASE
1100                 default:
1101                         pr_warning("unknown stat config term %" PRIu64 "\n",
1102                                    event->data[i].tag);
1103                 }
1104         }
1105 }
1106
1107 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1108 {
1109         const char *s;
1110
1111         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1112                 s = " exec";
1113         else
1114                 s = "";
1115
1116         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1117 }
1118
1119 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1120 {
1121         size_t ret = 0;
1122         struct perf_ns_link_info *ns_link_info;
1123         u32 nr_namespaces, idx;
1124
1125         ns_link_info = event->namespaces.link_info;
1126         nr_namespaces = event->namespaces.nr_namespaces;
1127
1128         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1129                        event->namespaces.pid,
1130                        event->namespaces.tid,
1131                        nr_namespaces);
1132
1133         for (idx = 0; idx < nr_namespaces; idx++) {
1134                 if (idx && (idx % 4 == 0))
1135                         ret += fprintf(fp, "\n\t\t ");
1136
1137                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1138                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1139                                 (u64)ns_link_info[idx].ino,
1140                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1141         }
1142
1143         return ret;
1144 }
1145
1146 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1147                              union perf_event *event,
1148                              struct perf_sample *sample,
1149                              struct machine *machine)
1150 {
1151         return machine__process_comm_event(machine, event, sample);
1152 }
1153
1154 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1155                                    union perf_event *event,
1156                                    struct perf_sample *sample,
1157                                    struct machine *machine)
1158 {
1159         return machine__process_namespaces_event(machine, event, sample);
1160 }
1161
1162 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1163                              union perf_event *event,
1164                              struct perf_sample *sample,
1165                              struct machine *machine)
1166 {
1167         return machine__process_lost_event(machine, event, sample);
1168 }
1169
1170 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1171                             union perf_event *event,
1172                             struct perf_sample *sample __maybe_unused,
1173                             struct machine *machine)
1174 {
1175         return machine__process_aux_event(machine, event);
1176 }
1177
1178 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1179                                      union perf_event *event,
1180                                      struct perf_sample *sample __maybe_unused,
1181                                      struct machine *machine)
1182 {
1183         return machine__process_itrace_start_event(machine, event);
1184 }
1185
1186 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1187                                      union perf_event *event,
1188                                      struct perf_sample *sample,
1189                                      struct machine *machine)
1190 {
1191         return machine__process_lost_samples_event(machine, event, sample);
1192 }
1193
1194 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1195                                union perf_event *event,
1196                                struct perf_sample *sample __maybe_unused,
1197                                struct machine *machine)
1198 {
1199         return machine__process_switch_event(machine, event);
1200 }
1201
1202 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1203 {
1204         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1205                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1206                        event->mmap.len, event->mmap.pgoff,
1207                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1208                        event->mmap.filename);
1209 }
1210
1211 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1212 {
1213         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1214                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1215                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1216                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1217                        event->mmap2.min, event->mmap2.ino,
1218                        event->mmap2.ino_generation,
1219                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1220                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1221                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1222                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1223                        event->mmap2.filename);
1224 }
1225
1226 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1227 {
1228         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1229         size_t ret;
1230
1231         ret = fprintf(fp, " nr: ");
1232
1233         if (threads)
1234                 ret += thread_map__fprintf(threads, fp);
1235         else
1236                 ret += fprintf(fp, "failed to get threads from event\n");
1237
1238         thread_map__put(threads);
1239         return ret;
1240 }
1241
1242 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1243 {
1244         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1245         size_t ret;
1246
1247         ret = fprintf(fp, ": ");
1248
1249         if (cpus)
1250                 ret += cpu_map__fprintf(cpus, fp);
1251         else
1252                 ret += fprintf(fp, "failed to get cpumap from event\n");
1253
1254         cpu_map__put(cpus);
1255         return ret;
1256 }
1257
1258 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1259                              union perf_event *event,
1260                              struct perf_sample *sample,
1261                              struct machine *machine)
1262 {
1263         return machine__process_mmap_event(machine, event, sample);
1264 }
1265
1266 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1267                              union perf_event *event,
1268                              struct perf_sample *sample,
1269                              struct machine *machine)
1270 {
1271         return machine__process_mmap2_event(machine, event, sample);
1272 }
1273
1274 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1275 {
1276         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1277                        event->fork.pid, event->fork.tid,
1278                        event->fork.ppid, event->fork.ptid);
1279 }
1280
1281 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1282                              union perf_event *event,
1283                              struct perf_sample *sample,
1284                              struct machine *machine)
1285 {
1286         return machine__process_fork_event(machine, event, sample);
1287 }
1288
1289 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1290                              union perf_event *event,
1291                              struct perf_sample *sample,
1292                              struct machine *machine)
1293 {
1294         return machine__process_exit_event(machine, event, sample);
1295 }
1296
1297 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1298 {
1299         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1300                        event->aux.aux_offset, event->aux.aux_size,
1301                        event->aux.flags,
1302                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1303                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1304                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1305 }
1306
1307 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1308 {
1309         return fprintf(fp, " pid: %u tid: %u\n",
1310                        event->itrace_start.pid, event->itrace_start.tid);
1311 }
1312
1313 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1314 {
1315         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1316         const char *in_out = out ? "OUT" : "IN ";
1317
1318         if (event->header.type == PERF_RECORD_SWITCH)
1319                 return fprintf(fp, " %s\n", in_out);
1320
1321         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1322                        in_out, out ? "next" : "prev",
1323                        event->context_switch.next_prev_pid,
1324                        event->context_switch.next_prev_tid);
1325 }
1326
1327 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1328 {
1329         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1330                              perf_event__name(event->header.type));
1331
1332         switch (event->header.type) {
1333         case PERF_RECORD_COMM:
1334                 ret += perf_event__fprintf_comm(event, fp);
1335                 break;
1336         case PERF_RECORD_FORK:
1337         case PERF_RECORD_EXIT:
1338                 ret += perf_event__fprintf_task(event, fp);
1339                 break;
1340         case PERF_RECORD_MMAP:
1341                 ret += perf_event__fprintf_mmap(event, fp);
1342                 break;
1343         case PERF_RECORD_NAMESPACES:
1344                 ret += perf_event__fprintf_namespaces(event, fp);
1345                 break;
1346         case PERF_RECORD_MMAP2:
1347                 ret += perf_event__fprintf_mmap2(event, fp);
1348                 break;
1349         case PERF_RECORD_AUX:
1350                 ret += perf_event__fprintf_aux(event, fp);
1351                 break;
1352         case PERF_RECORD_ITRACE_START:
1353                 ret += perf_event__fprintf_itrace_start(event, fp);
1354                 break;
1355         case PERF_RECORD_SWITCH:
1356         case PERF_RECORD_SWITCH_CPU_WIDE:
1357                 ret += perf_event__fprintf_switch(event, fp);
1358                 break;
1359         default:
1360                 ret += fprintf(fp, "\n");
1361         }
1362
1363         return ret;
1364 }
1365
1366 int perf_event__process(struct perf_tool *tool __maybe_unused,
1367                         union perf_event *event,
1368                         struct perf_sample *sample,
1369                         struct machine *machine)
1370 {
1371         return machine__process_event(machine, event, sample);
1372 }
1373
1374 void thread__find_addr_map(struct thread *thread, u8 cpumode,
1375                            enum map_type type, u64 addr,
1376                            struct addr_location *al)
1377 {
1378         struct map_groups *mg = thread->mg;
1379         struct machine *machine = mg->machine;
1380         bool load_map = false;
1381
1382         al->machine = machine;
1383         al->thread = thread;
1384         al->addr = addr;
1385         al->cpumode = cpumode;
1386         al->filtered = 0;
1387
1388         if (machine == NULL) {
1389                 al->map = NULL;
1390                 return;
1391         }
1392
1393         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1394                 al->level = 'k';
1395                 mg = &machine->kmaps;
1396                 load_map = true;
1397         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1398                 al->level = '.';
1399         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1400                 al->level = 'g';
1401                 mg = &machine->kmaps;
1402                 load_map = true;
1403         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1404                 al->level = 'u';
1405         } else {
1406                 al->level = 'H';
1407                 al->map = NULL;
1408
1409                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1410                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1411                         !perf_guest)
1412                         al->filtered |= (1 << HIST_FILTER__GUEST);
1413                 if ((cpumode == PERF_RECORD_MISC_USER ||
1414                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1415                         !perf_host)
1416                         al->filtered |= (1 << HIST_FILTER__HOST);
1417
1418                 return;
1419         }
1420 try_again:
1421         al->map = map_groups__find(mg, type, al->addr);
1422         if (al->map == NULL) {
1423                 /*
1424                  * If this is outside of all known maps, and is a negative
1425                  * address, try to look it up in the kernel dso, as it might be
1426                  * a vsyscall or vdso (which executes in user-mode).
1427                  *
1428                  * XXX This is nasty, we should have a symbol list in the
1429                  * "[vdso]" dso, but for now lets use the old trick of looking
1430                  * in the whole kernel symbol list.
1431                  */
1432                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1433                     mg != &machine->kmaps &&
1434                     machine__kernel_ip(machine, al->addr)) {
1435                         mg = &machine->kmaps;
1436                         load_map = true;
1437                         goto try_again;
1438                 }
1439         } else {
1440                 /*
1441                  * Kernel maps might be changed when loading symbols so loading
1442                  * must be done prior to using kernel maps.
1443                  */
1444                 if (load_map)
1445                         map__load(al->map);
1446                 al->addr = al->map->map_ip(al->map, al->addr);
1447         }
1448 }
1449
1450 void thread__find_addr_location(struct thread *thread,
1451                                 u8 cpumode, enum map_type type, u64 addr,
1452                                 struct addr_location *al)
1453 {
1454         thread__find_addr_map(thread, cpumode, type, addr, al);
1455         if (al->map != NULL)
1456                 al->sym = map__find_symbol(al->map, al->addr);
1457         else
1458                 al->sym = NULL;
1459 }
1460
1461 /*
1462  * Callers need to drop the reference to al->thread, obtained in
1463  * machine__findnew_thread()
1464  */
1465 int machine__resolve(struct machine *machine, struct addr_location *al,
1466                      struct perf_sample *sample)
1467 {
1468         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1469                                                         sample->tid);
1470
1471         if (thread == NULL)
1472                 return -1;
1473
1474         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1475         /*
1476          * Have we already created the kernel maps for this machine?
1477          *
1478          * This should have happened earlier, when we processed the kernel MMAP
1479          * events, but for older perf.data files there was no such thing, so do
1480          * it now.
1481          */
1482         if (sample->cpumode == PERF_RECORD_MISC_KERNEL &&
1483             machine__kernel_map(machine) == NULL)
1484                 machine__create_kernel_maps(machine);
1485
1486         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al);
1487         dump_printf(" ...... dso: %s\n",
1488                     al->map ? al->map->dso->long_name :
1489                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1490
1491         if (thread__is_filtered(thread))
1492                 al->filtered |= (1 << HIST_FILTER__THREAD);
1493
1494         al->sym = NULL;
1495         al->cpu = sample->cpu;
1496         al->socket = -1;
1497
1498         if (al->cpu >= 0) {
1499                 struct perf_env *env = machine->env;
1500
1501                 if (env && env->cpu)
1502                         al->socket = env->cpu[al->cpu].socket_id;
1503         }
1504
1505         if (al->map) {
1506                 struct dso *dso = al->map->dso;
1507
1508                 if (symbol_conf.dso_list &&
1509                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1510                                                   dso->short_name) ||
1511                                (dso->short_name != dso->long_name &&
1512                                 strlist__has_entry(symbol_conf.dso_list,
1513                                                    dso->long_name))))) {
1514                         al->filtered |= (1 << HIST_FILTER__DSO);
1515                 }
1516
1517                 al->sym = map__find_symbol(al->map, al->addr);
1518         }
1519
1520         if (symbol_conf.sym_list &&
1521                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1522                                                 al->sym->name))) {
1523                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1524         }
1525
1526         return 0;
1527 }
1528
1529 /*
1530  * The preprocess_sample method will return with reference counts for the
1531  * in it, when done using (and perhaps getting ref counts if needing to
1532  * keep a pointer to one of those entries) it must be paired with
1533  * addr_location__put(), so that the refcounts can be decremented.
1534  */
1535 void addr_location__put(struct addr_location *al)
1536 {
1537         thread__zput(al->thread);
1538 }
1539
1540 bool is_bts_event(struct perf_event_attr *attr)
1541 {
1542         return attr->type == PERF_TYPE_HARDWARE &&
1543                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1544                attr->sample_period == 1;
1545 }
1546
1547 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1548 {
1549         if (attr->type == PERF_TYPE_SOFTWARE &&
1550             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1551              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1552              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1553                 return true;
1554
1555         if (is_bts_event(attr))
1556                 return true;
1557
1558         return false;
1559 }
1560
1561 void thread__resolve(struct thread *thread, struct addr_location *al,
1562                      struct perf_sample *sample)
1563 {
1564         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al);
1565         if (!al->map)
1566                 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE,
1567                                       sample->addr, al);
1568
1569         al->cpu = sample->cpu;
1570         al->sym = NULL;
1571
1572         if (al->map)
1573                 al->sym = map__find_symbol(al->map, al->addr);
1574 }