tools/perf/util/event.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <dirent.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <inttypes.h>
   6 #include <linux/kernel.h>
   7 #include <linux/types.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <unistd.h>
  11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  12 #include <api/fs/fs.h>
  13 #include <linux/perf_event.h>
  14 #include "event.h"
  15 #include "debug.h"
  16 #include "hist.h"
  17 #include "machine.h"
  18 #include "sort.h"
  19 #include "string2.h"
  20 #include "strlist.h"
  21 #include "thread.h"
  22 #include "thread_map.h"
  23 #include "sane_ctype.h"
  24 #include "symbol/kallsyms.h"
  25 #include "asm/bug.h"
  26 #include "stat.h"
  27
  28 static const char *perf_event__names[] = {
  29         [0]                                     = "TOTAL",
  30         [PERF_RECORD_MMAP]                      = "MMAP",
  31         [PERF_RECORD_MMAP2]                     = "MMAP2",
  32         [PERF_RECORD_LOST]                      = "LOST",
  33         [PERF_RECORD_COMM]                      = "COMM",
  34         [PERF_RECORD_EXIT]                      = "EXIT",
  35         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  36         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  37         [PERF_RECORD_FORK]                      = "FORK",
  38         [PERF_RECORD_READ]                      = "READ",
  39         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  40         [PERF_RECORD_AUX]                       = "AUX",
  41         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  42         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  43         [PERF_RECORD_SWITCH]                    = "SWITCH",
  44         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  45         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  46         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  47         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  48         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  49         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  50         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  51         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  52         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  53         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  54         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  55         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  56         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  57         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  58         [PERF_RECORD_STAT]                      = "STAT",
  59         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  60         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  61         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  62         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  63 };
  64
  65 static const char *perf_ns__names[] = {
  66         [NET_NS_INDEX]          = "net",
  67         [UTS_NS_INDEX]          = "uts",
  68         [IPC_NS_INDEX]          = "ipc",
  69         [PID_NS_INDEX]          = "pid",
  70         [USER_NS_INDEX]         = "user",
  71         [MNT_NS_INDEX]          = "mnt",
  72         [CGROUP_NS_INDEX]       = "cgroup",
  73 };
  74
  75 const char *perf_event__name(unsigned int id)
  76 {
  77         if (id >= ARRAY_SIZE(perf_event__names))
  78                 return "INVALID";
  79         if (!perf_event__names[id])
  80                 return "UNKNOWN";
  81         return perf_event__names[id];
  82 }
  83
  84 static const char *perf_ns__name(unsigned int id)
  85 {
  86         if (id >= ARRAY_SIZE(perf_ns__names))
  87                 return "UNKNOWN";
  88         return perf_ns__names[id];
  89 }
  90
  91 int perf_tool__process_synth_event(struct perf_tool *tool,
  92                                    union perf_event *event,
  93                                    struct machine *machine,
  94                                    perf_event__handler_t process)
  95 {
  96         struct perf_sample synth_sample = {
  97         .pid       = -1,
  98         .tid       = -1,
  99         .time      = -1,
 100         .stream_id = -1,
 101         .cpu       = -1,
 102         .period    = 1,
 103         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 104         };
 105
 106         return process(tool, event, &synth_sample, machine);
 107 };
 108
 109 /*
 110  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 111  * the comm, tgid and ppid.
 112  */
 113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 114                                     pid_t *tgid, pid_t *ppid)
 115 {
 116         char filename[PATH_MAX];
 117         char bf[4096];
 118         int fd;
 119         size_t size = 0;
 120         ssize_t n;
 121         char *name, *tgids, *ppids;
 122
 123         *tgid = -1;
 124         *ppid = -1;
 125
 126         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 127
 128         fd = open(filename, O_RDONLY);
 129         if (fd < 0) {
 130                 pr_debug("couldn't open %s\n", filename);
 131                 return -1;
 132         }
 133
 134         n = read(fd, bf, sizeof(bf) - 1);
 135         close(fd);
 136         if (n <= 0) {
 137                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 138                            pid);
 139                 return -1;
 140         }
 141         bf[n] = '\0';
 142
 143         name = strstr(bf, "Name:");
 144         tgids = strstr(bf, "Tgid:");
 145         ppids = strstr(bf, "PPid:");
 146
 147         if (name) {
 148                 char *nl;
 149
 150                 name += 5;  /* strlen("Name:") */
 151                 name = ltrim(name);
 152
 153                 nl = strchr(name, '\n');
 154                 if (nl)
 155                         *nl = '\0';
 156
 157                 size = strlen(name);
 158                 if (size >= len)
 159                         size = len - 1;
 160                 memcpy(comm, name, size);
 161                 comm[size] = '\0';
 162         } else {
 163                 pr_debug("Name: string not found for pid %d\n", pid);
 164         }
 165
 166         if (tgids) {
 167                 tgids += 5;  /* strlen("Tgid:") */
 168                 *tgid = atoi(tgids);
 169         } else {
 170                 pr_debug("Tgid: string not found for pid %d\n", pid);
 171         }
 172
 173         if (ppids) {
 174                 ppids += 5;  /* strlen("PPid:") */
 175                 *ppid = atoi(ppids);
 176         } else {
 177                 pr_debug("PPid: string not found for pid %d\n", pid);
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 184                                     struct machine *machine,
 185                                     pid_t *tgid, pid_t *ppid)
 186 {
 187         size_t size;
 188
 189         *ppid = -1;
 190
 191         memset(&event->comm, 0, sizeof(event->comm));
 192
 193         if (machine__is_host(machine)) {
 194                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 195                                              sizeof(event->comm.comm),
 196                                              tgid, ppid) != 0) {
 197                         return -1;
 198                 }
 199         } else {
 200                 *tgid = machine->pid;
 201         }
 202
 203         if (*tgid < 0)
 204                 return -1;
 205
 206         event->comm.pid = *tgid;
 207         event->comm.header.type = PERF_RECORD_COMM;
 208
 209         size = strlen(event->comm.comm) + 1;
 210         size = PERF_ALIGN(size, sizeof(u64));
 211         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 212         event->comm.header.size = (sizeof(event->comm) -
 213                                 (sizeof(event->comm.comm) - size) +
 214                                 machine->id_hdr_size);
 215         event->comm.tid = pid;
 216
 217         return 0;
 218 }
 219
 220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 221                                          union perf_event *event, pid_t pid,
 222                                          perf_event__handler_t process,
 223                                          struct machine *machine)
 224 {
 225         pid_t tgid, ppid;
 226
 227         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 228                 return -1;
 229
 230         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 231                 return -1;
 232
 233         return tgid;
 234 }
 235
 236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 237                                          struct perf_ns_link_info *ns_link_info)
 238 {
 239         struct stat64 st;
 240         char proc_ns[128];
 241
 242         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 243         if (stat64(proc_ns, &st) == 0) {
 244                 ns_link_info->dev = st.st_dev;
 245                 ns_link_info->ino = st.st_ino;
 246         }
 247 }
 248
 249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 250                                       union perf_event *event,
 251                                       pid_t pid, pid_t tgid,
 252                                       perf_event__handler_t process,
 253                                       struct machine *machine)
 254 {
 255         u32 idx;
 256         struct perf_ns_link_info *ns_link_info;
 257
 258         if (!tool || !tool->namespace_events)
 259                 return 0;
 260
 261         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 262                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 263                machine->id_hdr_size));
 264
 265         event->namespaces.pid = tgid;
 266         event->namespaces.tid = pid;
 267
 268         event->namespaces.nr_namespaces = NR_NAMESPACES;
 269
 270         ns_link_info = event->namespaces.link_info;
 271
 272         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 273                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 274                                              &ns_link_info[idx]);
 275
 276         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 277
 278         event->namespaces.header.size = (sizeof(event->namespaces) +
 279                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 280                         machine->id_hdr_size);
 281
 282         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 283                 return -1;
 284
 285         return 0;
 286 }
 287
 288 static int perf_event__synthesize_fork(struct perf_tool *tool,
 289                                        union perf_event *event,
 290                                        pid_t pid, pid_t tgid, pid_t ppid,
 291                                        perf_event__handler_t process,
 292                                        struct machine *machine)
 293 {
 294         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 295
 296         /*
 297          * for main thread set parent to ppid from status file. For other
 298          * threads set parent pid to main thread. ie., assume main thread
 299          * spawns all threads in a process
 300         */
 301         if (tgid == pid) {
 302                 event->fork.ppid = ppid;
 303                 event->fork.ptid = ppid;
 304         } else {
 305                 event->fork.ppid = tgid;
 306                 event->fork.ptid = tgid;
 307         }
 308         event->fork.pid  = tgid;
 309         event->fork.tid  = pid;
 310         event->fork.header.type = PERF_RECORD_FORK;
 311
 312         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 313
 314         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 315                 return -1;
 316
 317         return 0;
 318 }
 319
 320 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 321                                        union perf_event *event,
 322                                        pid_t pid, pid_t tgid,
 323                                        perf_event__handler_t process,
 324                                        struct machine *machine,
 325                                        bool mmap_data,
 326                                        unsigned int proc_map_timeout)
 327 {
 328         char filename[PATH_MAX];
 329         FILE *fp;
 330         unsigned long long t;
 331         bool truncation = false;
 332         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 333         int rc = 0;
 334         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 335         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 336
 337         if (machine__is_default_guest(machine))
 338                 return 0;
 339
 340         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 341                  machine->root_dir, pid, pid);
 342
 343         fp = fopen(filename, "r");
 344         if (fp == NULL) {
 345                 /*
 346                  * We raced with a task exiting - just return:
 347                  */
 348                 pr_debug("couldn't open %s\n", filename);
 349                 return -1;
 350         }
 351
 352         event->header.type = PERF_RECORD_MMAP2;
 353         t = rdclock();
 354
 355         while (1) {
 356                 char bf[BUFSIZ];
 357                 char prot[5];
 358                 char execname[PATH_MAX];
 359                 char anonstr[] = "//anon";
 360                 unsigned int ino;
 361                 size_t size;
 362                 ssize_t n;
 363
 364                 if (fgets(bf, sizeof(bf), fp) == NULL)
 365                         break;
 366
 367                 if ((rdclock() - t) > timeout) {
 368                         pr_warning("Reading %s time out. "
 369                                    "You may want to increase "
 370                                    "the time limit by --proc-map-timeout\n",
 371                                    filename);
 372                         truncation = true;
 373                         goto out;
 374                 }
 375
 376                 /* ensure null termination since stack will be reused. */
 377                 strcpy(execname, "");
 378
 379                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 380                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 381                        &event->mmap2.start, &event->mmap2.len, prot,
 382                        &event->mmap2.pgoff, &event->mmap2.maj,
 383                        &event->mmap2.min,
 384                        &ino, execname);
 385
 386                 /*
 387                  * Anon maps don't have the execname.
 388                  */
 389                 if (n < 7)
 390                         continue;
 391
 392                 event->mmap2.ino = (u64)ino;
 393
 394                 /*
 395                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 396                  */
 397                 if (machine__is_host(machine))
 398                         event->header.misc = PERF_RECORD_MISC_USER;
 399                 else
 400                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 401
 402                 /* map protection and flags bits */
 403                 event->mmap2.prot = 0;
 404                 event->mmap2.flags = 0;
 405                 if (prot[0] == 'r')
 406                         event->mmap2.prot |= PROT_READ;
 407                 if (prot[1] == 'w')
 408                         event->mmap2.prot |= PROT_WRITE;
 409                 if (prot[2] == 'x')
 410                         event->mmap2.prot |= PROT_EXEC;
 411
 412                 if (prot[3] == 's')
 413                         event->mmap2.flags |= MAP_SHARED;
 414                 else
 415                         event->mmap2.flags |= MAP_PRIVATE;
 416
 417                 if (prot[2] != 'x') {
 418                         if (!mmap_data || prot[0] != 'r')
 419                                 continue;
 420
 421                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 422                 }
 423
 424 out:
 425                 if (truncation)
 426                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 427
 428                 if (!strcmp(execname, ""))
 429                         strcpy(execname, anonstr);
 430
 431                 if (hugetlbfs_mnt_len &&
 432                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 433                         strcpy(execname, anonstr);
 434                         event->mmap2.flags |= MAP_HUGETLB;
 435                 }
 436
 437                 size = strlen(execname) + 1;
 438                 memcpy(event->mmap2.filename, execname, size);
 439                 size = PERF_ALIGN(size, sizeof(u64));
 440                 event->mmap2.len -= event->mmap.start;
 441                 event->mmap2.header.size = (sizeof(event->mmap2) -
 442                                         (sizeof(event->mmap2.filename) - size));
 443                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 444                 event->mmap2.header.size += machine->id_hdr_size;
 445                 event->mmap2.pid = tgid;
 446                 event->mmap2.tid = pid;
 447
 448                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 449                         rc = -1;
 450                         break;
 451                 }
 452
 453                 if (truncation)
 454                         break;
 455         }
 456
 457         fclose(fp);
 458         return rc;
 459 }
 460
 461 int perf_event__synthesize_modules(struct perf_tool *tool,
 462                                    perf_event__handler_t process,
 463                                    struct machine *machine)
 464 {
 465         int rc = 0;
 466         struct map *pos;
 467         struct maps *maps = machine__kernel_maps(machine);
 468         union perf_event *event = zalloc((sizeof(event->mmap) +
 469                                           machine->id_hdr_size));
 470         if (event == NULL) {
 471                 pr_debug("Not enough memory synthesizing mmap event "
 472                          "for kernel modules\n");
 473                 return -1;
 474         }
 475
 476         event->header.type = PERF_RECORD_MMAP;
 477
 478         /*
 479          * kernel uses 0 for user space maps, see kernel/perf_event.c
 480          * __perf_event_mmap
 481          */
 482         if (machine__is_host(machine))
 483                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 484         else
 485                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 486
 487         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 488                 size_t size;
 489
 490                 if (!__map__is_kmodule(pos))
 491                         continue;
 492
 493                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 494                 event->mmap.header.type = PERF_RECORD_MMAP;
 495                 event->mmap.header.size = (sizeof(event->mmap) -
 496                                         (sizeof(event->mmap.filename) - size));
 497                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 498                 event->mmap.header.size += machine->id_hdr_size;
 499                 event->mmap.start = pos->start;
 500                 event->mmap.len   = pos->end - pos->start;
 501                 event->mmap.pid   = machine->pid;
 502
 503                 memcpy(event->mmap.filename, pos->dso->long_name,
 504                        pos->dso->long_name_len + 1);
 505                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 506                         rc = -1;
 507                         break;
 508                 }
 509         }
 510
 511         free(event);
 512         return rc;
 513 }
 514
 515 static int __event__synthesize_thread(union perf_event *comm_event,
 516                                       union perf_event *mmap_event,
 517                                       union perf_event *fork_event,
 518                                       union perf_event *namespaces_event,
 519                                       pid_t pid, int full,
 520                                       perf_event__handler_t process,
 521                                       struct perf_tool *tool,
 522                                       struct machine *machine,
 523                                       bool mmap_data,
 524                                       unsigned int proc_map_timeout)
 525 {
 526         char filename[PATH_MAX];
 527         DIR *tasks;
 528         struct dirent *dirent;
 529         pid_t tgid, ppid;
 530         int rc = 0;
 531
 532         /* special case: only send one comm event using passed in pid */
 533         if (!full) {
 534                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 535                                                    process, machine);
 536
 537                 if (tgid == -1)
 538                         return -1;
 539
 540                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 541                                                       tgid, process, machine) < 0)
 542                         return -1;
 543
 544
 545                 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 546                                                           process, machine, mmap_data,
 547                                                           proc_map_timeout);
 548         }
 549
 550         if (machine__is_default_guest(machine))
 551                 return 0;
 552
 553         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 554                  machine->root_dir, pid);
 555
 556         tasks = opendir(filename);
 557         if (tasks == NULL) {
 558                 pr_debug("couldn't open %s\n", filename);
 559                 return 0;
 560         }
 561
 562         while ((dirent = readdir(tasks)) != NULL) {
 563                 char *end;
 564                 pid_t _pid;
 565
 566                 _pid = strtol(dirent->d_name, &end, 10);
 567                 if (*end)
 568                         continue;
 569
 570                 rc = -1;
 571                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 572                                              &tgid, &ppid) != 0)
 573                         break;
 574
 575                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 576                                                 ppid, process, machine) < 0)
 577                         break;
 578
 579                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 580                                                       tgid, process, machine) < 0)
 581                         break;
 582
 583                 /*
 584                  * Send the prepared comm event
 585                  */
 586                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 587                         break;
 588
 589                 rc = 0;
 590                 if (_pid == pid) {
 591                         /* process the parent's maps too */
 592                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 593                                                 process, machine, mmap_data, proc_map_timeout);
 594                         if (rc)
 595                                 break;
 596                 }
 597         }
 598
 599         closedir(tasks);
 600         return rc;
 601 }
 602
 603 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 604                                       struct thread_map *threads,
 605                                       perf_event__handler_t process,
 606                                       struct machine *machine,
 607                                       bool mmap_data,
 608                                       unsigned int proc_map_timeout)
 609 {
 610         union perf_event *comm_event, *mmap_event, *fork_event;
 611         union perf_event *namespaces_event;
 612         int err = -1, thread, j;
 613
 614         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 615         if (comm_event == NULL)
 616                 goto out;
 617
 618         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 619         if (mmap_event == NULL)
 620                 goto out_free_comm;
 621
 622         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 623         if (fork_event == NULL)
 624                 goto out_free_mmap;
 625
 626         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 627                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 628                                   machine->id_hdr_size);
 629         if (namespaces_event == NULL)
 630                 goto out_free_fork;
 631
 632         err = 0;
 633         for (thread = 0; thread < threads->nr; ++thread) {
 634                 if (__event__synthesize_thread(comm_event, mmap_event,
 635                                                fork_event, namespaces_event,
 636                                                thread_map__pid(threads, thread), 0,
 637                                                process, tool, machine,
 638                                                mmap_data, proc_map_timeout)) {
 639                         err = -1;
 640                         break;
 641                 }
 642
 643                 /*
 644                  * comm.pid is set to thread group id by
 645                  * perf_event__synthesize_comm
 646                  */
 647                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 648                         bool need_leader = true;
 649
 650                         /* is thread group leader in thread_map? */
 651                         for (j = 0; j < threads->nr; ++j) {
 652                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 653                                         need_leader = false;
 654                                         break;
 655                                 }
 656                         }
 657
 658                         /* if not, generate events for it */
 659                         if (need_leader &&
 660                             __event__synthesize_thread(comm_event, mmap_event,
 661                                                        fork_event, namespaces_event,
 662                                                        comm_event->comm.pid, 0,
 663                                                        process, tool, machine,
 664                                                        mmap_data, proc_map_timeout)) {
 665                                 err = -1;
 666                                 break;
 667                         }
 668                 }
 669         }
 670         free(namespaces_event);
 671 out_free_fork:
 672         free(fork_event);
 673 out_free_mmap:
 674         free(mmap_event);
 675 out_free_comm:
 676         free(comm_event);
 677 out:
 678         return err;
 679 }
 680
 681 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 682                                             perf_event__handler_t process,
 683                                             struct machine *machine,
 684                                             bool mmap_data,
 685                                             unsigned int proc_map_timeout,
 686                                             struct dirent **dirent,
 687                                             int start,
 688                                             int num)
 689 {
 690         union perf_event *comm_event, *mmap_event, *fork_event;
 691         union perf_event *namespaces_event;
 692         int err = -1;
 693         char *end;
 694         pid_t pid;
 695         int i;
 696
 697         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 698         if (comm_event == NULL)
 699                 goto out;
 700
 701         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 702         if (mmap_event == NULL)
 703                 goto out_free_comm;
 704
 705         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 706         if (fork_event == NULL)
 707                 goto out_free_mmap;
 708
 709         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 710                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 711                                   machine->id_hdr_size);
 712         if (namespaces_event == NULL)
 713                 goto out_free_fork;
 714
 715         for (i = start; i < start + num; i++) {
 716                 if (!isdigit(dirent[i]->d_name[0]))
 717                         continue;
 718
 719                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 720                 /* only interested in proper numerical dirents */
 721                 if (*end)
 722                         continue;
 723                 /*
 724                  * We may race with exiting thread, so don't stop just because
 725                  * one thread couldn't be synthesized.
 726                  */
 727                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 728                                            namespaces_event, pid, 1, process,
 729                                            tool, machine, mmap_data,
 730                                            proc_map_timeout);
 731         }
 732         err = 0;
 733
 734         free(namespaces_event);
 735 out_free_fork:
 736         free(fork_event);
 737 out_free_mmap:
 738         free(mmap_event);
 739 out_free_comm:
 740         free(comm_event);
 741 out:
 742         return err;
 743 }
 744
 745 struct synthesize_threads_arg {
 746         struct perf_tool *tool;
 747         perf_event__handler_t process;
 748         struct machine *machine;
 749         bool mmap_data;
 750         unsigned int proc_map_timeout;
 751         struct dirent **dirent;
 752         int num;
 753         int start;
 754 };
 755
 756 static void *synthesize_threads_worker(void *arg)
 757 {
 758         struct synthesize_threads_arg *args = arg;
 759
 760         __perf_event__synthesize_threads(args->tool, args->process,
 761                                          args->machine, args->mmap_data,
 762                                          args->proc_map_timeout, args->dirent,
 763                                          args->start, args->num);
 764         return NULL;
 765 }
 766
 767 int perf_event__synthesize_threads(struct perf_tool *tool,
 768                                    perf_event__handler_t process,
 769                                    struct machine *machine,
 770                                    bool mmap_data,
 771                                    unsigned int proc_map_timeout,
 772                                    unsigned int nr_threads_synthesize)
 773 {
 774         struct synthesize_threads_arg *args = NULL;
 775         pthread_t *synthesize_threads = NULL;
 776         char proc_path[PATH_MAX];
 777         struct dirent **dirent;
 778         int num_per_thread;
 779         int m, n, i, j;
 780         int thread_nr;
 781         int base = 0;
 782         int err = -1;
 783
 784
 785         if (machine__is_default_guest(machine))
 786                 return 0;
 787
 788         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 789         n = scandir(proc_path, &dirent, 0, alphasort);
 790         if (n < 0)
 791                 return err;
 792
 793         if (nr_threads_synthesize == UINT_MAX)
 794                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 795         else
 796                 thread_nr = nr_threads_synthesize;
 797
 798         if (thread_nr <= 1) {
 799                 err = __perf_event__synthesize_threads(tool, process,
 800                                                        machine, mmap_data,
 801                                                        proc_map_timeout,
 802                                                        dirent, base, n);
 803                 goto free_dirent;
 804         }
 805         if (thread_nr > n)
 806                 thread_nr = n;
 807
 808         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 809         if (synthesize_threads == NULL)
 810                 goto free_dirent;
 811
 812         args = calloc(sizeof(*args), thread_nr);
 813         if (args == NULL)
 814                 goto free_threads;
 815
 816         num_per_thread = n / thread_nr;
 817         m = n % thread_nr;
 818         for (i = 0; i < thread_nr; i++) {
 819                 args[i].tool = tool;
 820                 args[i].process = process;
 821                 args[i].machine = machine;
 822                 args[i].mmap_data = mmap_data;
 823                 args[i].proc_map_timeout = proc_map_timeout;
 824                 args[i].dirent = dirent;
 825         }
 826         for (i = 0; i < m; i++) {
 827                 args[i].num = num_per_thread + 1;
 828                 args[i].start = i * args[i].num;
 829         }
 830         if (i != 0)
 831                 base = args[i-1].start + args[i-1].num;
 832         for (j = i; j < thread_nr; j++) {
 833                 args[j].num = num_per_thread;
 834                 args[j].start = base + (j - i) * args[i].num;
 835         }
 836
 837         for (i = 0; i < thread_nr; i++) {
 838                 if (pthread_create(&synthesize_threads[i], NULL,
 839                                    synthesize_threads_worker, &args[i]))
 840                         goto out_join;
 841         }
 842         err = 0;
 843 out_join:
 844         for (i = 0; i < thread_nr; i++)
 845                 pthread_join(synthesize_threads[i], NULL);
 846         free(args);
 847 free_threads:
 848         free(synthesize_threads);
 849 free_dirent:
 850         for (i = 0; i < n; i++)
 851                 free(dirent[i]);
 852         free(dirent);
 853
 854         return err;
 855 }
 856
 857 struct process_symbol_args {
 858         const char *name;
 859         u64        start;
 860 };
 861
 862 static int find_symbol_cb(void *arg, const char *name, char type,
 863                           u64 start)
 864 {
 865         struct process_symbol_args *args = arg;
 866
 867         /*
 868          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 869          * an 'A' to the same address as "_stext".
 870          */
 871         if (!(kallsyms__is_function(type) ||
 872               type == 'A') || strcmp(name, args->name))
 873                 return 0;
 874
 875         args->start = start;
 876         return 1;
 877 }
 878
 879 int kallsyms__get_function_start(const char *kallsyms_filename,
 880                                  const char *symbol_name, u64 *addr)
 881 {
 882         struct process_symbol_args args = { .name = symbol_name, };
 883
 884         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 885                 return -1;
 886
 887         *addr = args.start;
 888         return 0;
 889 }
 890
 891 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
 892                                               perf_event__handler_t process __maybe_unused,
 893                                               struct machine *machine __maybe_unused)
 894 {
 895         return 0;
 896 }
 897
 898 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 899                                                 perf_event__handler_t process,
 900                                                 struct machine *machine)
 901 {
 902         size_t size;
 903         struct map *map = machine__kernel_map(machine);
 904         struct kmap *kmap;
 905         int err;
 906         union perf_event *event;
 907
 908         if (symbol_conf.kptr_restrict)
 909                 return -1;
 910         if (map == NULL)
 911                 return -1;
 912
 913         /*
 914          * We should get this from /sys/kernel/sections/.text, but till that is
 915          * available use this, and after it is use this as a fallback for older
 916          * kernels.
 917          */
 918         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 919         if (event == NULL) {
 920                 pr_debug("Not enough memory synthesizing mmap event "
 921                          "for kernel modules\n");
 922                 return -1;
 923         }
 924
 925         if (machine__is_host(machine)) {
 926                 /*
 927                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 928                  * see kernel/perf_event.c __perf_event_mmap
 929                  */
 930                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 931         } else {
 932                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 933         }
 934
 935         kmap = map__kmap(map);
 936         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 937                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 938         size = PERF_ALIGN(size, sizeof(u64));
 939         event->mmap.header.type = PERF_RECORD_MMAP;
 940         event->mmap.header.size = (sizeof(event->mmap) -
 941                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 942         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 943         event->mmap.start = map->start;
 944         event->mmap.len   = map->end - event->mmap.start;
 945         event->mmap.pid   = machine->pid;
 946
 947         err = perf_tool__process_synth_event(tool, event, machine, process);
 948         free(event);
 949
 950         return err;
 951 }
 952
 953 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 954                                        perf_event__handler_t process,
 955                                        struct machine *machine)
 956 {
 957         int err;
 958
 959         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
 960         if (err < 0)
 961                 return err;
 962
 963         return perf_event__synthesize_extra_kmaps(tool, process, machine);
 964 }
 965
 966 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 967                                       struct thread_map *threads,
 968                                       perf_event__handler_t process,
 969                                       struct machine *machine)
 970 {
 971         union perf_event *event;
 972         int i, err, size;
 973
 974         size  = sizeof(event->thread_map);
 975         size += threads->nr * sizeof(event->thread_map.entries[0]);
 976
 977         event = zalloc(size);
 978         if (!event)
 979                 return -ENOMEM;
 980
 981         event->header.type = PERF_RECORD_THREAD_MAP;
 982         event->header.size = size;
 983         event->thread_map.nr = threads->nr;
 984
 985         for (i = 0; i < threads->nr; i++) {
 986                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 987                 char *comm = thread_map__comm(threads, i);
 988
 989                 if (!comm)
 990                         comm = (char *) "";
 991
 992                 entry->pid = thread_map__pid(threads, i);
 993                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
 994         }
 995
 996         err = process(tool, event, NULL, machine);
 997
 998         free(event);
 999         return err;
1000 }
1001
1002 static void synthesize_cpus(struct cpu_map_entries *cpus,
1003                             struct cpu_map *map)
1004 {
1005         int i;
1006
1007         cpus->nr = map->nr;
1008
1009         for (i = 0; i < map->nr; i++)
1010                 cpus->cpu[i] = map->map[i];
1011 }
1012
1013 static void synthesize_mask(struct cpu_map_mask *mask,
1014                             struct cpu_map *map, int max)
1015 {
1016         int i;
1017
1018         mask->nr = BITS_TO_LONGS(max);
1019         mask->long_size = sizeof(long);
1020
1021         for (i = 0; i < map->nr; i++)
1022                 set_bit(map->map[i], mask->mask);
1023 }
1024
1025 static size_t cpus_size(struct cpu_map *map)
1026 {
1027         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1028 }
1029
1030 static size_t mask_size(struct cpu_map *map, int *max)
1031 {
1032         int i;
1033
1034         *max = 0;
1035
1036         for (i = 0; i < map->nr; i++) {
1037                 /* bit possition of the cpu is + 1 */
1038                 int bit = map->map[i] + 1;
1039
1040                 if (bit > *max)
1041                         *max = bit;
1042         }
1043
1044         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1045 }
1046
1047 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1048 {
1049         size_t size_cpus, size_mask;
1050         bool is_dummy = cpu_map__empty(map);
1051
1052         /*
1053          * Both array and mask data have variable size based
1054          * on the number of cpus and their actual values.
1055          * The size of the 'struct cpu_map_data' is:
1056          *
1057          *   array = size of 'struct cpu_map_entries' +
1058          *           number of cpus * sizeof(u64)
1059          *
1060          *   mask  = size of 'struct cpu_map_mask' +
1061          *           maximum cpu bit converted to size of longs
1062          *
1063          * and finaly + the size of 'struct cpu_map_data'.
1064          */
1065         size_cpus = cpus_size(map);
1066         size_mask = mask_size(map, max);
1067
1068         if (is_dummy || (size_cpus < size_mask)) {
1069                 *size += size_cpus;
1070                 *type  = PERF_CPU_MAP__CPUS;
1071         } else {
1072                 *size += size_mask;
1073                 *type  = PERF_CPU_MAP__MASK;
1074         }
1075
1076         *size += sizeof(struct cpu_map_data);
1077         return zalloc(*size);
1078 }
1079
1080 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1081                               u16 type, int max)
1082 {
1083         data->type = type;
1084
1085         switch (type) {
1086         case PERF_CPU_MAP__CPUS:
1087                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1088                 break;
1089         case PERF_CPU_MAP__MASK:
1090                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1091         default:
1092                 break;
1093         };
1094 }
1095
1096 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1097 {
1098         size_t size = sizeof(struct cpu_map_event);
1099         struct cpu_map_event *event;
1100         int max;
1101         u16 type;
1102
1103         event = cpu_map_data__alloc(map, &size, &type, &max);
1104         if (!event)
1105                 return NULL;
1106
1107         event->header.type = PERF_RECORD_CPU_MAP;
1108         event->header.size = size;
1109         event->data.type   = type;
1110
1111         cpu_map_data__synthesize(&event->data, map, type, max);
1112         return event;
1113 }
1114
1115 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1116                                    struct cpu_map *map,
1117                                    perf_event__handler_t process,
1118                                    struct machine *machine)
1119 {
1120         struct cpu_map_event *event;
1121         int err;
1122
1123         event = cpu_map_event__new(map);
1124         if (!event)
1125                 return -ENOMEM;
1126
1127         err = process(tool, (union perf_event *) event, NULL, machine);
1128
1129         free(event);
1130         return err;
1131 }
1132
1133 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1134                                        struct perf_stat_config *config,
1135                                        perf_event__handler_t process,
1136                                        struct machine *machine)
1137 {
1138         struct stat_config_event *event;
1139         int size, i = 0, err;
1140
1141         size  = sizeof(*event);
1142         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1143
1144         event = zalloc(size);
1145         if (!event)
1146                 return -ENOMEM;
1147
1148         event->header.type = PERF_RECORD_STAT_CONFIG;
1149         event->header.size = size;
1150         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1151
1152 #define ADD(__term, __val)                                      \
1153         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1154         event->data[i].val = __val;                             \
1155         i++;
1156
1157         ADD(AGGR_MODE,  config->aggr_mode)
1158         ADD(INTERVAL,   config->interval)
1159         ADD(SCALE,      config->scale)
1160
1161         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1162                   "stat config terms unbalanced\n");
1163 #undef ADD
1164
1165         err = process(tool, (union perf_event *) event, NULL, machine);
1166
1167         free(event);
1168         return err;
1169 }
1170
1171 int perf_event__synthesize_stat(struct perf_tool *tool,
1172                                 u32 cpu, u32 thread, u64 id,
1173                                 struct perf_counts_values *count,
1174                                 perf_event__handler_t process,
1175                                 struct machine *machine)
1176 {
1177         struct stat_event event;
1178
1179         event.header.type = PERF_RECORD_STAT;
1180         event.header.size = sizeof(event);
1181         event.header.misc = 0;
1182
1183         event.id        = id;
1184         event.cpu       = cpu;
1185         event.thread    = thread;
1186         event.val       = count->val;
1187         event.ena       = count->ena;
1188         event.run       = count->run;
1189
1190         return process(tool, (union perf_event *) &event, NULL, machine);
1191 }
1192
1193 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1194                                       u64 evtime, u64 type,
1195                                       perf_event__handler_t process,
1196                                       struct machine *machine)
1197 {
1198         struct stat_round_event event;
1199
1200         event.header.type = PERF_RECORD_STAT_ROUND;
1201         event.header.size = sizeof(event);
1202         event.header.misc = 0;
1203
1204         event.time = evtime;
1205         event.type = type;
1206
1207         return process(tool, (union perf_event *) &event, NULL, machine);
1208 }
1209
1210 void perf_event__read_stat_config(struct perf_stat_config *config,
1211                                   struct stat_config_event *event)
1212 {
1213         unsigned i;
1214
1215         for (i = 0; i < event->nr; i++) {
1216
1217                 switch (event->data[i].tag) {
1218 #define CASE(__term, __val)                                     \
1219                 case PERF_STAT_CONFIG_TERM__##__term:           \
1220                         config->__val = event->data[i].val;     \
1221                         break;
1222
1223                 CASE(AGGR_MODE, aggr_mode)
1224                 CASE(SCALE,     scale)
1225                 CASE(INTERVAL,  interval)
1226 #undef CASE
1227                 default:
1228                         pr_warning("unknown stat config term %" PRIu64 "\n",
1229                                    event->data[i].tag);
1230                 }
1231         }
1232 }
1233
1234 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1235 {
1236         const char *s;
1237
1238         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1239                 s = " exec";
1240         else
1241                 s = "";
1242
1243         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1244 }
1245
1246 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1247 {
1248         size_t ret = 0;
1249         struct perf_ns_link_info *ns_link_info;
1250         u32 nr_namespaces, idx;
1251
1252         ns_link_info = event->namespaces.link_info;
1253         nr_namespaces = event->namespaces.nr_namespaces;
1254
1255         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1256                        event->namespaces.pid,
1257                        event->namespaces.tid,
1258                        nr_namespaces);
1259
1260         for (idx = 0; idx < nr_namespaces; idx++) {
1261                 if (idx && (idx % 4 == 0))
1262                         ret += fprintf(fp, "\n\t\t ");
1263
1264                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1265                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1266                                 (u64)ns_link_info[idx].ino,
1267                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1268         }
1269
1270         return ret;
1271 }
1272
1273 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1274                              union perf_event *event,
1275                              struct perf_sample *sample,
1276                              struct machine *machine)
1277 {
1278         return machine__process_comm_event(machine, event, sample);
1279 }
1280
1281 int perf_event__process_namespaces(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_namespaces_event(machine, event, sample);
1287 }
1288
1289 int perf_event__process_lost(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_lost_event(machine, event, sample);
1295 }
1296
1297 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1298                             union perf_event *event,
1299                             struct perf_sample *sample __maybe_unused,
1300                             struct machine *machine)
1301 {
1302         return machine__process_aux_event(machine, event);
1303 }
1304
1305 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1306                                      union perf_event *event,
1307                                      struct perf_sample *sample __maybe_unused,
1308                                      struct machine *machine)
1309 {
1310         return machine__process_itrace_start_event(machine, event);
1311 }
1312
1313 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1314                                      union perf_event *event,
1315                                      struct perf_sample *sample,
1316                                      struct machine *machine)
1317 {
1318         return machine__process_lost_samples_event(machine, event, sample);
1319 }
1320
1321 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1322                                union perf_event *event,
1323                                struct perf_sample *sample __maybe_unused,
1324                                struct machine *machine)
1325 {
1326         return machine__process_switch_event(machine, event);
1327 }
1328
1329 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1330 {
1331         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1332                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1333                        event->mmap.len, event->mmap.pgoff,
1334                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1335                        event->mmap.filename);
1336 }
1337
1338 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1339 {
1340         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1341                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1342                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1343                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1344                        event->mmap2.min, event->mmap2.ino,
1345                        event->mmap2.ino_generation,
1346                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1347                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1348                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1349                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1350                        event->mmap2.filename);
1351 }
1352
1353 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1354 {
1355         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1356         size_t ret;
1357
1358         ret = fprintf(fp, " nr: ");
1359
1360         if (threads)
1361                 ret += thread_map__fprintf(threads, fp);
1362         else
1363                 ret += fprintf(fp, "failed to get threads from event\n");
1364
1365         thread_map__put(threads);
1366         return ret;
1367 }
1368
1369 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1370 {
1371         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1372         size_t ret;
1373
1374         ret = fprintf(fp, ": ");
1375
1376         if (cpus)
1377                 ret += cpu_map__fprintf(cpus, fp);
1378         else
1379                 ret += fprintf(fp, "failed to get cpumap from event\n");
1380
1381         cpu_map__put(cpus);
1382         return ret;
1383 }
1384
1385 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1386                              union perf_event *event,
1387                              struct perf_sample *sample,
1388                              struct machine *machine)
1389 {
1390         return machine__process_mmap_event(machine, event, sample);
1391 }
1392
1393 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1394                              union perf_event *event,
1395                              struct perf_sample *sample,
1396                              struct machine *machine)
1397 {
1398         return machine__process_mmap2_event(machine, event, sample);
1399 }
1400
1401 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1402 {
1403         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1404                        event->fork.pid, event->fork.tid,
1405                        event->fork.ppid, event->fork.ptid);
1406 }
1407
1408 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1409                              union perf_event *event,
1410                              struct perf_sample *sample,
1411                              struct machine *machine)
1412 {
1413         return machine__process_fork_event(machine, event, sample);
1414 }
1415
1416 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1417                              union perf_event *event,
1418                              struct perf_sample *sample,
1419                              struct machine *machine)
1420 {
1421         return machine__process_exit_event(machine, event, sample);
1422 }
1423
1424 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1425 {
1426         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1427                        event->aux.aux_offset, event->aux.aux_size,
1428                        event->aux.flags,
1429                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1430                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1431                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1432 }
1433
1434 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1435 {
1436         return fprintf(fp, " pid: %u tid: %u\n",
1437                        event->itrace_start.pid, event->itrace_start.tid);
1438 }
1439
1440 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1441 {
1442         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1443         const char *in_out = !out ? "IN         " :
1444                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1445                                     "OUT        " : "OUT preempt";
1446
1447         if (event->header.type == PERF_RECORD_SWITCH)
1448                 return fprintf(fp, " %s\n", in_out);
1449
1450         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1451                        in_out, out ? "next" : "prev",
1452                        event->context_switch.next_prev_pid,
1453                        event->context_switch.next_prev_tid);
1454 }
1455
1456 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1457 {
1458         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1459 }
1460
1461 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1462 {
1463         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1464                              perf_event__name(event->header.type));
1465
1466         switch (event->header.type) {
1467         case PERF_RECORD_COMM:
1468                 ret += perf_event__fprintf_comm(event, fp);
1469                 break;
1470         case PERF_RECORD_FORK:
1471         case PERF_RECORD_EXIT:
1472                 ret += perf_event__fprintf_task(event, fp);
1473                 break;
1474         case PERF_RECORD_MMAP:
1475                 ret += perf_event__fprintf_mmap(event, fp);
1476                 break;
1477         case PERF_RECORD_NAMESPACES:
1478                 ret += perf_event__fprintf_namespaces(event, fp);
1479                 break;
1480         case PERF_RECORD_MMAP2:
1481                 ret += perf_event__fprintf_mmap2(event, fp);
1482                 break;
1483         case PERF_RECORD_AUX:
1484                 ret += perf_event__fprintf_aux(event, fp);
1485                 break;
1486         case PERF_RECORD_ITRACE_START:
1487                 ret += perf_event__fprintf_itrace_start(event, fp);
1488                 break;
1489         case PERF_RECORD_SWITCH:
1490         case PERF_RECORD_SWITCH_CPU_WIDE:
1491                 ret += perf_event__fprintf_switch(event, fp);
1492                 break;
1493         case PERF_RECORD_LOST:
1494                 ret += perf_event__fprintf_lost(event, fp);
1495                 break;
1496         default:
1497                 ret += fprintf(fp, "\n");
1498         }
1499
1500         return ret;
1501 }
1502
1503 int perf_event__process(struct perf_tool *tool __maybe_unused,
1504                         union perf_event *event,
1505                         struct perf_sample *sample,
1506                         struct machine *machine)
1507 {
1508         return machine__process_event(machine, event, sample);
1509 }
1510
1511 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1512                              struct addr_location *al)
1513 {
1514         struct map_groups *mg = thread->mg;
1515         struct machine *machine = mg->machine;
1516         bool load_map = false;
1517
1518         al->machine = machine;
1519         al->thread = thread;
1520         al->addr = addr;
1521         al->cpumode = cpumode;
1522         al->filtered = 0;
1523
1524         if (machine == NULL) {
1525                 al->map = NULL;
1526                 return NULL;
1527         }
1528
1529         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1530                 al->level = 'k';
1531                 mg = &machine->kmaps;
1532                 load_map = true;
1533         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1534                 al->level = '.';
1535         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1536                 al->level = 'g';
1537                 mg = &machine->kmaps;
1538                 load_map = true;
1539         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1540                 al->level = 'u';
1541         } else {
1542                 al->level = 'H';
1543                 al->map = NULL;
1544
1545                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1546                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1547                         !perf_guest)
1548                         al->filtered |= (1 << HIST_FILTER__GUEST);
1549                 if ((cpumode == PERF_RECORD_MISC_USER ||
1550                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1551                         !perf_host)
1552                         al->filtered |= (1 << HIST_FILTER__HOST);
1553
1554                 return NULL;
1555         }
1556 try_again:
1557         al->map = map_groups__find(mg, al->addr);
1558         if (al->map == NULL) {
1559                 /*
1560                  * If this is outside of all known maps, and is a negative
1561                  * address, try to look it up in the kernel dso, as it might be
1562                  * a vsyscall or vdso (which executes in user-mode).
1563                  *
1564                  * XXX This is nasty, we should have a symbol list in the
1565                  * "[vdso]" dso, but for now lets use the old trick of looking
1566                  * in the whole kernel symbol list.
1567                  */
1568                 if (cpumode == PERF_RECORD_MISC_USER && machine &&
1569                     mg != &machine->kmaps &&
1570                     machine__kernel_ip(machine, al->addr)) {
1571                         mg = &machine->kmaps;
1572                         load_map = true;
1573                         goto try_again;
1574                 }
1575         } else {
1576                 /*
1577                  * Kernel maps might be changed when loading symbols so loading
1578                  * must be done prior to using kernel maps.
1579                  */
1580                 if (load_map)
1581                         map__load(al->map);
1582                 al->addr = al->map->map_ip(al->map, al->addr);
1583         }
1584
1585         return al->map;
1586 }
1587
1588 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1589                                    u64 addr, struct addr_location *al)
1590 {
1591         al->sym = NULL;
1592         if (thread__find_map(thread, cpumode, addr, al))
1593                 al->sym = map__find_symbol(al->map, al->addr);
1594         return al->sym;
1595 }
1596
1597 /*
1598  * Callers need to drop the reference to al->thread, obtained in
1599  * machine__findnew_thread()
1600  */
1601 int machine__resolve(struct machine *machine, struct addr_location *al,
1602                      struct perf_sample *sample)
1603 {
1604         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1605                                                         sample->tid);
1606
1607         if (thread == NULL)
1608                 return -1;
1609
1610         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1611         thread__find_map(thread, sample->cpumode, sample->ip, al);
1612         dump_printf(" ...... dso: %s\n",
1613                     al->map ? al->map->dso->long_name :
1614                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1615
1616         if (thread__is_filtered(thread))
1617                 al->filtered |= (1 << HIST_FILTER__THREAD);
1618
1619         al->sym = NULL;
1620         al->cpu = sample->cpu;
1621         al->socket = -1;
1622         al->srcline = NULL;
1623
1624         if (al->cpu >= 0) {
1625                 struct perf_env *env = machine->env;
1626
1627                 if (env && env->cpu)
1628                         al->socket = env->cpu[al->cpu].socket_id;
1629         }
1630
1631         if (al->map) {
1632                 struct dso *dso = al->map->dso;
1633
1634                 if (symbol_conf.dso_list &&
1635                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1636                                                   dso->short_name) ||
1637                                (dso->short_name != dso->long_name &&
1638                                 strlist__has_entry(symbol_conf.dso_list,
1639                                                    dso->long_name))))) {
1640                         al->filtered |= (1 << HIST_FILTER__DSO);
1641                 }
1642
1643                 al->sym = map__find_symbol(al->map, al->addr);
1644         }
1645
1646         if (symbol_conf.sym_list &&
1647                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1648                                                 al->sym->name))) {
1649                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1650         }
1651
1652         return 0;
1653 }
1654
1655 /*
1656  * The preprocess_sample method will return with reference counts for the
1657  * in it, when done using (and perhaps getting ref counts if needing to
1658  * keep a pointer to one of those entries) it must be paired with
1659  * addr_location__put(), so that the refcounts can be decremented.
1660  */
1661 void addr_location__put(struct addr_location *al)
1662 {
1663         thread__zput(al->thread);
1664 }
1665
1666 bool is_bts_event(struct perf_event_attr *attr)
1667 {
1668         return attr->type == PERF_TYPE_HARDWARE &&
1669                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1670                attr->sample_period == 1;
1671 }
1672
1673 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1674 {
1675         if (attr->type == PERF_TYPE_SOFTWARE &&
1676             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1677              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1678              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1679                 return true;
1680
1681         if (is_bts_event(attr))
1682                 return true;
1683
1684         return false;
1685 }
1686
1687 void thread__resolve(struct thread *thread, struct addr_location *al,
1688                      struct perf_sample *sample)
1689 {
1690         thread__find_map(thread, sample->cpumode, sample->addr, al);
1691
1692         al->cpu = sample->cpu;
1693         al->sym = NULL;
1694
1695         if (al->map)
1696                 al->sym = map__find_symbol(al->map, al->addr);
1697 }