tools/perf/util/event.c

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