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 "map.h"
  25 #include "symbol.h"
  26 #include "symbol/kallsyms.h"
  27 #include "asm/bug.h"
  28 #include "stat.h"
  29 #include "session.h"
  30 #include "bpf-event.h"
  31
  32 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
  33
  34 static const char *perf_event__names[] = {
  35         [0]                                     = "TOTAL",
  36         [PERF_RECORD_MMAP]                      = "MMAP",
  37         [PERF_RECORD_MMAP2]                     = "MMAP2",
  38         [PERF_RECORD_LOST]                      = "LOST",
  39         [PERF_RECORD_COMM]                      = "COMM",
  40         [PERF_RECORD_EXIT]                      = "EXIT",
  41         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  42         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  43         [PERF_RECORD_FORK]                      = "FORK",
  44         [PERF_RECORD_READ]                      = "READ",
  45         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  46         [PERF_RECORD_AUX]                       = "AUX",
  47         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  48         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  49         [PERF_RECORD_SWITCH]                    = "SWITCH",
  50         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  51         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  52         [PERF_RECORD_KSYMBOL]                   = "KSYMBOL",
  53         [PERF_RECORD_BPF_EVENT]                 = "BPF_EVENT",
  54         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  55         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  56         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  57         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  58         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  59         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  60         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  61         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  62         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  63         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  64         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  65         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  66         [PERF_RECORD_STAT]                      = "STAT",
  67         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  68         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  69         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  70         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  71         [PERF_RECORD_COMPRESSED]                = "COMPRESSED",
  72 };
  73
  74 static const char *perf_ns__names[] = {
  75         [NET_NS_INDEX]          = "net",
  76         [UTS_NS_INDEX]          = "uts",
  77         [IPC_NS_INDEX]          = "ipc",
  78         [PID_NS_INDEX]          = "pid",
  79         [USER_NS_INDEX]         = "user",
  80         [MNT_NS_INDEX]          = "mnt",
  81         [CGROUP_NS_INDEX]       = "cgroup",
  82 };
  83
  84 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
  85
  86 const char *perf_event__name(unsigned int id)
  87 {
  88         if (id >= ARRAY_SIZE(perf_event__names))
  89                 return "INVALID";
  90         if (!perf_event__names[id])
  91                 return "UNKNOWN";
  92         return perf_event__names[id];
  93 }
  94
  95 static const char *perf_ns__name(unsigned int id)
  96 {
  97         if (id >= ARRAY_SIZE(perf_ns__names))
  98                 return "UNKNOWN";
  99         return perf_ns__names[id];
 100 }
 101
 102 int perf_tool__process_synth_event(struct perf_tool *tool,
 103                                    union perf_event *event,
 104                                    struct machine *machine,
 105                                    perf_event__handler_t process)
 106 {
 107         struct perf_sample synth_sample = {
 108         .pid       = -1,
 109         .tid       = -1,
 110         .time      = -1,
 111         .stream_id = -1,
 112         .cpu       = -1,
 113         .period    = 1,
 114         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 115         };
 116
 117         return process(tool, event, &synth_sample, machine);
 118 };
 119
 120 /*
 121  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 122  * the comm, tgid and ppid.
 123  */
 124 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 125                                     pid_t *tgid, pid_t *ppid)
 126 {
 127         char filename[PATH_MAX];
 128         char bf[4096];
 129         int fd;
 130         size_t size = 0;
 131         ssize_t n;
 132         char *name, *tgids, *ppids;
 133
 134         *tgid = -1;
 135         *ppid = -1;
 136
 137         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 138
 139         fd = open(filename, O_RDONLY);
 140         if (fd < 0) {
 141                 pr_debug("couldn't open %s\n", filename);
 142                 return -1;
 143         }
 144
 145         n = read(fd, bf, sizeof(bf) - 1);
 146         close(fd);
 147         if (n <= 0) {
 148                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 149                            pid);
 150                 return -1;
 151         }
 152         bf[n] = '\0';
 153
 154         name = strstr(bf, "Name:");
 155         tgids = strstr(bf, "Tgid:");
 156         ppids = strstr(bf, "PPid:");
 157
 158         if (name) {
 159                 char *nl;
 160
 161                 name += 5;  /* strlen("Name:") */
 162                 name = ltrim(name);
 163
 164                 nl = strchr(name, '\n');
 165                 if (nl)
 166                         *nl = '\0';
 167
 168                 size = strlen(name);
 169                 if (size >= len)
 170                         size = len - 1;
 171                 memcpy(comm, name, size);
 172                 comm[size] = '\0';
 173         } else {
 174                 pr_debug("Name: string not found for pid %d\n", pid);
 175         }
 176
 177         if (tgids) {
 178                 tgids += 5;  /* strlen("Tgid:") */
 179                 *tgid = atoi(tgids);
 180         } else {
 181                 pr_debug("Tgid: string not found for pid %d\n", pid);
 182         }
 183
 184         if (ppids) {
 185                 ppids += 5;  /* strlen("PPid:") */
 186                 *ppid = atoi(ppids);
 187         } else {
 188                 pr_debug("PPid: string not found for pid %d\n", pid);
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 195                                     struct machine *machine,
 196                                     pid_t *tgid, pid_t *ppid)
 197 {
 198         size_t size;
 199
 200         *ppid = -1;
 201
 202         memset(&event->comm, 0, sizeof(event->comm));
 203
 204         if (machine__is_host(machine)) {
 205                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 206                                              sizeof(event->comm.comm),
 207                                              tgid, ppid) != 0) {
 208                         return -1;
 209                 }
 210         } else {
 211                 *tgid = machine->pid;
 212         }
 213
 214         if (*tgid < 0)
 215                 return -1;
 216
 217         event->comm.pid = *tgid;
 218         event->comm.header.type = PERF_RECORD_COMM;
 219
 220         size = strlen(event->comm.comm) + 1;
 221         size = PERF_ALIGN(size, sizeof(u64));
 222         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 223         event->comm.header.size = (sizeof(event->comm) -
 224                                 (sizeof(event->comm.comm) - size) +
 225                                 machine->id_hdr_size);
 226         event->comm.tid = pid;
 227
 228         return 0;
 229 }
 230
 231 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 232                                          union perf_event *event, pid_t pid,
 233                                          perf_event__handler_t process,
 234                                          struct machine *machine)
 235 {
 236         pid_t tgid, ppid;
 237
 238         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 239                 return -1;
 240
 241         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 242                 return -1;
 243
 244         return tgid;
 245 }
 246
 247 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 248                                          struct perf_ns_link_info *ns_link_info)
 249 {
 250         struct stat64 st;
 251         char proc_ns[128];
 252
 253         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 254         if (stat64(proc_ns, &st) == 0) {
 255                 ns_link_info->dev = st.st_dev;
 256                 ns_link_info->ino = st.st_ino;
 257         }
 258 }
 259
 260 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 261                                       union perf_event *event,
 262                                       pid_t pid, pid_t tgid,
 263                                       perf_event__handler_t process,
 264                                       struct machine *machine)
 265 {
 266         u32 idx;
 267         struct perf_ns_link_info *ns_link_info;
 268
 269         if (!tool || !tool->namespace_events)
 270                 return 0;
 271
 272         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 273                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 274                machine->id_hdr_size));
 275
 276         event->namespaces.pid = tgid;
 277         event->namespaces.tid = pid;
 278
 279         event->namespaces.nr_namespaces = NR_NAMESPACES;
 280
 281         ns_link_info = event->namespaces.link_info;
 282
 283         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 284                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 285                                              &ns_link_info[idx]);
 286
 287         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 288
 289         event->namespaces.header.size = (sizeof(event->namespaces) +
 290                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 291                         machine->id_hdr_size);
 292
 293         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 294                 return -1;
 295
 296         return 0;
 297 }
 298
 299 static int perf_event__synthesize_fork(struct perf_tool *tool,
 300                                        union perf_event *event,
 301                                        pid_t pid, pid_t tgid, pid_t ppid,
 302                                        perf_event__handler_t process,
 303                                        struct machine *machine)
 304 {
 305         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 306
 307         /*
 308          * for main thread set parent to ppid from status file. For other
 309          * threads set parent pid to main thread. ie., assume main thread
 310          * spawns all threads in a process
 311         */
 312         if (tgid == pid) {
 313                 event->fork.ppid = ppid;
 314                 event->fork.ptid = ppid;
 315         } else {
 316                 event->fork.ppid = tgid;
 317                 event->fork.ptid = tgid;
 318         }
 319         event->fork.pid  = tgid;
 320         event->fork.tid  = pid;
 321         event->fork.header.type = PERF_RECORD_FORK;
 322         event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 323
 324         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 325
 326         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 327                 return -1;
 328
 329         return 0;
 330 }
 331
 332 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 333                                        union perf_event *event,
 334                                        pid_t pid, pid_t tgid,
 335                                        perf_event__handler_t process,
 336                                        struct machine *machine,
 337                                        bool mmap_data)
 338 {
 339         char filename[PATH_MAX];
 340         FILE *fp;
 341         unsigned long long t;
 342         bool truncation = false;
 343         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 344         int rc = 0;
 345         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 346         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 347
 348         if (machine__is_default_guest(machine))
 349                 return 0;
 350
 351         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 352                  machine->root_dir, pid, pid);
 353
 354         fp = fopen(filename, "r");
 355         if (fp == NULL) {
 356                 /*
 357                  * We raced with a task exiting - just return:
 358                  */
 359                 pr_debug("couldn't open %s\n", filename);
 360                 return -1;
 361         }
 362
 363         event->header.type = PERF_RECORD_MMAP2;
 364         t = rdclock();
 365
 366         while (1) {
 367                 char bf[BUFSIZ];
 368                 char prot[5];
 369                 char execname[PATH_MAX];
 370                 char anonstr[] = "//anon";
 371                 unsigned int ino;
 372                 size_t size;
 373                 ssize_t n;
 374
 375                 if (fgets(bf, sizeof(bf), fp) == NULL)
 376                         break;
 377
 378                 if ((rdclock() - t) > timeout) {
 379                         pr_warning("Reading %s time out. "
 380                                    "You may want to increase "
 381                                    "the time limit by --proc-map-timeout\n",
 382                                    filename);
 383                         truncation = true;
 384                         goto out;
 385                 }
 386
 387                 /* ensure null termination since stack will be reused. */
 388                 strcpy(execname, "");
 389
 390                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 391                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 392                        &event->mmap2.start, &event->mmap2.len, prot,
 393                        &event->mmap2.pgoff, &event->mmap2.maj,
 394                        &event->mmap2.min,
 395                        &ino, execname);
 396
 397                 /*
 398                  * Anon maps don't have the execname.
 399                  */
 400                 if (n < 7)
 401                         continue;
 402
 403                 event->mmap2.ino = (u64)ino;
 404
 405                 /*
 406                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 407                  */
 408                 if (machine__is_host(machine))
 409                         event->header.misc = PERF_RECORD_MISC_USER;
 410                 else
 411                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 412
 413                 /* map protection and flags bits */
 414                 event->mmap2.prot = 0;
 415                 event->mmap2.flags = 0;
 416                 if (prot[0] == 'r')
 417                         event->mmap2.prot |= PROT_READ;
 418                 if (prot[1] == 'w')
 419                         event->mmap2.prot |= PROT_WRITE;
 420                 if (prot[2] == 'x')
 421                         event->mmap2.prot |= PROT_EXEC;
 422
 423                 if (prot[3] == 's')
 424                         event->mmap2.flags |= MAP_SHARED;
 425                 else
 426                         event->mmap2.flags |= MAP_PRIVATE;
 427
 428                 if (prot[2] != 'x') {
 429                         if (!mmap_data || prot[0] != 'r')
 430                                 continue;
 431
 432                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 433                 }
 434
 435 out:
 436                 if (truncation)
 437                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 438
 439                 if (!strcmp(execname, ""))
 440                         strcpy(execname, anonstr);
 441
 442                 if (hugetlbfs_mnt_len &&
 443                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 444                         strcpy(execname, anonstr);
 445                         event->mmap2.flags |= MAP_HUGETLB;
 446                 }
 447
 448                 size = strlen(execname) + 1;
 449                 memcpy(event->mmap2.filename, execname, size);
 450                 size = PERF_ALIGN(size, sizeof(u64));
 451                 event->mmap2.len -= event->mmap.start;
 452                 event->mmap2.header.size = (sizeof(event->mmap2) -
 453                                         (sizeof(event->mmap2.filename) - size));
 454                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 455                 event->mmap2.header.size += machine->id_hdr_size;
 456                 event->mmap2.pid = tgid;
 457                 event->mmap2.tid = pid;
 458
 459                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 460                         rc = -1;
 461                         break;
 462                 }
 463
 464                 if (truncation)
 465                         break;
 466         }
 467
 468         fclose(fp);
 469         return rc;
 470 }
 471
 472 int perf_event__synthesize_modules(struct perf_tool *tool,
 473                                    perf_event__handler_t process,
 474                                    struct machine *machine)
 475 {
 476         int rc = 0;
 477         struct map *pos;
 478         struct maps *maps = machine__kernel_maps(machine);
 479         union perf_event *event = zalloc((sizeof(event->mmap) +
 480                                           machine->id_hdr_size));
 481         if (event == NULL) {
 482                 pr_debug("Not enough memory synthesizing mmap event "
 483                          "for kernel modules\n");
 484                 return -1;
 485         }
 486
 487         event->header.type = PERF_RECORD_MMAP;
 488
 489         /*
 490          * kernel uses 0 for user space maps, see kernel/perf_event.c
 491          * __perf_event_mmap
 492          */
 493         if (machine__is_host(machine))
 494                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 495         else
 496                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 497
 498         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 499                 size_t size;
 500
 501                 if (!__map__is_kmodule(pos))
 502                         continue;
 503
 504                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 505                 event->mmap.header.type = PERF_RECORD_MMAP;
 506                 event->mmap.header.size = (sizeof(event->mmap) -
 507                                         (sizeof(event->mmap.filename) - size));
 508                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 509                 event->mmap.header.size += machine->id_hdr_size;
 510                 event->mmap.start = pos->start;
 511                 event->mmap.len   = pos->end - pos->start;
 512                 event->mmap.pid   = machine->pid;
 513
 514                 memcpy(event->mmap.filename, pos->dso->long_name,
 515                        pos->dso->long_name_len + 1);
 516                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 517                         rc = -1;
 518                         break;
 519                 }
 520         }
 521
 522         free(event);
 523         return rc;
 524 }
 525
 526 static int __event__synthesize_thread(union perf_event *comm_event,
 527                                       union perf_event *mmap_event,
 528                                       union perf_event *fork_event,
 529                                       union perf_event *namespaces_event,
 530                                       pid_t pid, int full,
 531                                       perf_event__handler_t process,
 532                                       struct perf_tool *tool,
 533                                       struct machine *machine,
 534                                       bool mmap_data)
 535 {
 536         char filename[PATH_MAX];
 537         DIR *tasks;
 538         struct dirent *dirent;
 539         pid_t tgid, ppid;
 540         int rc = 0;
 541
 542         /* special case: only send one comm event using passed in pid */
 543         if (!full) {
 544                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 545                                                    process, machine);
 546
 547                 if (tgid == -1)
 548                         return -1;
 549
 550                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 551                                                       tgid, process, machine) < 0)
 552                         return -1;
 553
 554                 /*
 555                  * send mmap only for thread group leader
 556                  * see thread__init_map_groups
 557                  */
 558                 if (pid == tgid &&
 559                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 560                                                        process, machine, mmap_data))
 561                         return -1;
 562
 563                 return 0;
 564         }
 565
 566         if (machine__is_default_guest(machine))
 567                 return 0;
 568
 569         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 570                  machine->root_dir, pid);
 571
 572         tasks = opendir(filename);
 573         if (tasks == NULL) {
 574                 pr_debug("couldn't open %s\n", filename);
 575                 return 0;
 576         }
 577
 578         while ((dirent = readdir(tasks)) != NULL) {
 579                 char *end;
 580                 pid_t _pid;
 581
 582                 _pid = strtol(dirent->d_name, &end, 10);
 583                 if (*end)
 584                         continue;
 585
 586                 rc = -1;
 587                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 588                                              &tgid, &ppid) != 0)
 589                         break;
 590
 591                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 592                                                 ppid, process, machine) < 0)
 593                         break;
 594
 595                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 596                                                       tgid, process, machine) < 0)
 597                         break;
 598
 599                 /*
 600                  * Send the prepared comm event
 601                  */
 602                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 603                         break;
 604
 605                 rc = 0;
 606                 if (_pid == pid) {
 607                         /* process the parent's maps too */
 608                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 609                                                 process, machine, mmap_data);
 610                         if (rc)
 611                                 break;
 612                 }
 613         }
 614
 615         closedir(tasks);
 616         return rc;
 617 }
 618
 619 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 620                                       struct thread_map *threads,
 621                                       perf_event__handler_t process,
 622                                       struct machine *machine,
 623                                       bool mmap_data)
 624 {
 625         union perf_event *comm_event, *mmap_event, *fork_event;
 626         union perf_event *namespaces_event;
 627         int err = -1, thread, j;
 628
 629         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 630         if (comm_event == NULL)
 631                 goto out;
 632
 633         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 634         if (mmap_event == NULL)
 635                 goto out_free_comm;
 636
 637         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 638         if (fork_event == NULL)
 639                 goto out_free_mmap;
 640
 641         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 642                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 643                                   machine->id_hdr_size);
 644         if (namespaces_event == NULL)
 645                 goto out_free_fork;
 646
 647         err = 0;
 648         for (thread = 0; thread < threads->nr; ++thread) {
 649                 if (__event__synthesize_thread(comm_event, mmap_event,
 650                                                fork_event, namespaces_event,
 651                                                thread_map__pid(threads, thread), 0,
 652                                                process, tool, machine,
 653                                                mmap_data)) {
 654                         err = -1;
 655                         break;
 656                 }
 657
 658                 /*
 659                  * comm.pid is set to thread group id by
 660                  * perf_event__synthesize_comm
 661                  */
 662                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 663                         bool need_leader = true;
 664
 665                         /* is thread group leader in thread_map? */
 666                         for (j = 0; j < threads->nr; ++j) {
 667                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 668                                         need_leader = false;
 669                                         break;
 670                                 }
 671                         }
 672
 673                         /* if not, generate events for it */
 674                         if (need_leader &&
 675                             __event__synthesize_thread(comm_event, mmap_event,
 676                                                        fork_event, namespaces_event,
 677                                                        comm_event->comm.pid, 0,
 678                                                        process, tool, machine,
 679                                                        mmap_data)) {
 680                                 err = -1;
 681                                 break;
 682                         }
 683                 }
 684         }
 685         free(namespaces_event);
 686 out_free_fork:
 687         free(fork_event);
 688 out_free_mmap:
 689         free(mmap_event);
 690 out_free_comm:
 691         free(comm_event);
 692 out:
 693         return err;
 694 }
 695
 696 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 697                                             perf_event__handler_t process,
 698                                             struct machine *machine,
 699                                             bool mmap_data,
 700                                             struct dirent **dirent,
 701                                             int start,
 702                                             int num)
 703 {
 704         union perf_event *comm_event, *mmap_event, *fork_event;
 705         union perf_event *namespaces_event;
 706         int err = -1;
 707         char *end;
 708         pid_t pid;
 709         int i;
 710
 711         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 712         if (comm_event == NULL)
 713                 goto out;
 714
 715         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 716         if (mmap_event == NULL)
 717                 goto out_free_comm;
 718
 719         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 720         if (fork_event == NULL)
 721                 goto out_free_mmap;
 722
 723         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 724                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 725                                   machine->id_hdr_size);
 726         if (namespaces_event == NULL)
 727                 goto out_free_fork;
 728
 729         for (i = start; i < start + num; i++) {
 730                 if (!isdigit(dirent[i]->d_name[0]))
 731                         continue;
 732
 733                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 734                 /* only interested in proper numerical dirents */
 735                 if (*end)
 736                         continue;
 737                 /*
 738                  * We may race with exiting thread, so don't stop just because
 739                  * one thread couldn't be synthesized.
 740                  */
 741                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 742                                            namespaces_event, pid, 1, process,
 743                                            tool, machine, mmap_data);
 744         }
 745         err = 0;
 746
 747         free(namespaces_event);
 748 out_free_fork:
 749         free(fork_event);
 750 out_free_mmap:
 751         free(mmap_event);
 752 out_free_comm:
 753         free(comm_event);
 754 out:
 755         return err;
 756 }
 757
 758 struct synthesize_threads_arg {
 759         struct perf_tool *tool;
 760         perf_event__handler_t process;
 761         struct machine *machine;
 762         bool mmap_data;
 763         struct dirent **dirent;
 764         int num;
 765         int start;
 766 };
 767
 768 static void *synthesize_threads_worker(void *arg)
 769 {
 770         struct synthesize_threads_arg *args = arg;
 771
 772         __perf_event__synthesize_threads(args->tool, args->process,
 773                                          args->machine, args->mmap_data,
 774                                          args->dirent,
 775                                          args->start, args->num);
 776         return NULL;
 777 }
 778
 779 int perf_event__synthesize_threads(struct perf_tool *tool,
 780                                    perf_event__handler_t process,
 781                                    struct machine *machine,
 782                                    bool mmap_data,
 783                                    unsigned int nr_threads_synthesize)
 784 {
 785         struct synthesize_threads_arg *args = NULL;
 786         pthread_t *synthesize_threads = NULL;
 787         char proc_path[PATH_MAX];
 788         struct dirent **dirent;
 789         int num_per_thread;
 790         int m, n, i, j;
 791         int thread_nr;
 792         int base = 0;
 793         int err = -1;
 794
 795
 796         if (machine__is_default_guest(machine))
 797                 return 0;
 798
 799         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 800         n = scandir(proc_path, &dirent, 0, alphasort);
 801         if (n < 0)
 802                 return err;
 803
 804         if (nr_threads_synthesize == UINT_MAX)
 805                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 806         else
 807                 thread_nr = nr_threads_synthesize;
 808
 809         if (thread_nr <= 1) {
 810                 err = __perf_event__synthesize_threads(tool, process,
 811                                                        machine, mmap_data,
 812                                                        dirent, base, n);
 813                 goto free_dirent;
 814         }
 815         if (thread_nr > n)
 816                 thread_nr = n;
 817
 818         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 819         if (synthesize_threads == NULL)
 820                 goto free_dirent;
 821
 822         args = calloc(sizeof(*args), thread_nr);
 823         if (args == NULL)
 824                 goto free_threads;
 825
 826         num_per_thread = n / thread_nr;
 827         m = n % thread_nr;
 828         for (i = 0; i < thread_nr; i++) {
 829                 args[i].tool = tool;
 830                 args[i].process = process;
 831                 args[i].machine = machine;
 832                 args[i].mmap_data = mmap_data;
 833                 args[i].dirent = dirent;
 834         }
 835         for (i = 0; i < m; i++) {
 836                 args[i].num = num_per_thread + 1;
 837                 args[i].start = i * args[i].num;
 838         }
 839         if (i != 0)
 840                 base = args[i-1].start + args[i-1].num;
 841         for (j = i; j < thread_nr; j++) {
 842                 args[j].num = num_per_thread;
 843                 args[j].start = base + (j - i) * args[i].num;
 844         }
 845
 846         for (i = 0; i < thread_nr; i++) {
 847                 if (pthread_create(&synthesize_threads[i], NULL,
 848                                    synthesize_threads_worker, &args[i]))
 849                         goto out_join;
 850         }
 851         err = 0;
 852 out_join:
 853         for (i = 0; i < thread_nr; i++)
 854                 pthread_join(synthesize_threads[i], NULL);
 855         free(args);
 856 free_threads:
 857         free(synthesize_threads);
 858 free_dirent:
 859         for (i = 0; i < n; i++)
 860                 free(dirent[i]);
 861         free(dirent);
 862
 863         return err;
 864 }
 865
 866 struct process_symbol_args {
 867         const char *name;
 868         u64        start;
 869 };
 870
 871 static int find_symbol_cb(void *arg, const char *name, char type,
 872                           u64 start)
 873 {
 874         struct process_symbol_args *args = arg;
 875
 876         /*
 877          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 878          * an 'A' to the same address as "_stext".
 879          */
 880         if (!(kallsyms__is_function(type) ||
 881               type == 'A') || strcmp(name, args->name))
 882                 return 0;
 883
 884         args->start = start;
 885         return 1;
 886 }
 887
 888 int kallsyms__get_function_start(const char *kallsyms_filename,
 889                                  const char *symbol_name, u64 *addr)
 890 {
 891         struct process_symbol_args args = { .name = symbol_name, };
 892
 893         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 894                 return -1;
 895
 896         *addr = args.start;
 897         return 0;
 898 }
 899
 900 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
 901                                               perf_event__handler_t process __maybe_unused,
 902                                               struct machine *machine __maybe_unused)
 903 {
 904         return 0;
 905 }
 906
 907 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 908                                                 perf_event__handler_t process,
 909                                                 struct machine *machine)
 910 {
 911         size_t size;
 912         struct map *map = machine__kernel_map(machine);
 913         struct kmap *kmap;
 914         int err;
 915         union perf_event *event;
 916
 917         if (symbol_conf.kptr_restrict)
 918                 return -1;
 919         if (map == NULL)
 920                 return -1;
 921
 922         /*
 923          * We should get this from /sys/kernel/sections/.text, but till that is
 924          * available use this, and after it is use this as a fallback for older
 925          * kernels.
 926          */
 927         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 928         if (event == NULL) {
 929                 pr_debug("Not enough memory synthesizing mmap event "
 930                          "for kernel modules\n");
 931                 return -1;
 932         }
 933
 934         if (machine__is_host(machine)) {
 935                 /*
 936                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 937                  * see kernel/perf_event.c __perf_event_mmap
 938                  */
 939                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 940         } else {
 941                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 942         }
 943
 944         kmap = map__kmap(map);
 945         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 946                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 947         size = PERF_ALIGN(size, sizeof(u64));
 948         event->mmap.header.type = PERF_RECORD_MMAP;
 949         event->mmap.header.size = (sizeof(event->mmap) -
 950                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 951         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 952         event->mmap.start = map->start;
 953         event->mmap.len   = map->end - event->mmap.start;
 954         event->mmap.pid   = machine->pid;
 955
 956         err = perf_tool__process_synth_event(tool, event, machine, process);
 957         free(event);
 958
 959         return err;
 960 }
 961
 962 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 963                                        perf_event__handler_t process,
 964                                        struct machine *machine)
 965 {
 966         int err;
 967
 968         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
 969         if (err < 0)
 970                 return err;
 971
 972         return perf_event__synthesize_extra_kmaps(tool, process, machine);
 973 }
 974
 975 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 976                                       struct thread_map *threads,
 977                                       perf_event__handler_t process,
 978                                       struct machine *machine)
 979 {
 980         union perf_event *event;
 981         int i, err, size;
 982
 983         size  = sizeof(event->thread_map);
 984         size += threads->nr * sizeof(event->thread_map.entries[0]);
 985
 986         event = zalloc(size);
 987         if (!event)
 988                 return -ENOMEM;
 989
 990         event->header.type = PERF_RECORD_THREAD_MAP;
 991         event->header.size = size;
 992         event->thread_map.nr = threads->nr;
 993
 994         for (i = 0; i < threads->nr; i++) {
 995                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 996                 char *comm = thread_map__comm(threads, i);
 997
 998                 if (!comm)
 999                         comm = (char *) "";
1000
1001                 entry->pid = thread_map__pid(threads, i);
1002                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1003         }
1004
1005         err = process(tool, event, NULL, machine);
1006
1007         free(event);
1008         return err;
1009 }
1010
1011 static void synthesize_cpus(struct cpu_map_entries *cpus,
1012                             struct cpu_map *map)
1013 {
1014         int i;
1015
1016         cpus->nr = map->nr;
1017
1018         for (i = 0; i < map->nr; i++)
1019                 cpus->cpu[i] = map->map[i];
1020 }
1021
1022 static void synthesize_mask(struct cpu_map_mask *mask,
1023                             struct cpu_map *map, int max)
1024 {
1025         int i;
1026
1027         mask->nr = BITS_TO_LONGS(max);
1028         mask->long_size = sizeof(long);
1029
1030         for (i = 0; i < map->nr; i++)
1031                 set_bit(map->map[i], mask->mask);
1032 }
1033
1034 static size_t cpus_size(struct cpu_map *map)
1035 {
1036         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1037 }
1038
1039 static size_t mask_size(struct cpu_map *map, int *max)
1040 {
1041         int i;
1042
1043         *max = 0;
1044
1045         for (i = 0; i < map->nr; i++) {
1046                 /* bit possition of the cpu is + 1 */
1047                 int bit = map->map[i] + 1;
1048
1049                 if (bit > *max)
1050                         *max = bit;
1051         }
1052
1053         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1054 }
1055
1056 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1057 {
1058         size_t size_cpus, size_mask;
1059         bool is_dummy = cpu_map__empty(map);
1060
1061         /*
1062          * Both array and mask data have variable size based
1063          * on the number of cpus and their actual values.
1064          * The size of the 'struct cpu_map_data' is:
1065          *
1066          *   array = size of 'struct cpu_map_entries' +
1067          *           number of cpus * sizeof(u64)
1068          *
1069          *   mask  = size of 'struct cpu_map_mask' +
1070          *           maximum cpu bit converted to size of longs
1071          *
1072          * and finaly + the size of 'struct cpu_map_data'.
1073          */
1074         size_cpus = cpus_size(map);
1075         size_mask = mask_size(map, max);
1076
1077         if (is_dummy || (size_cpus < size_mask)) {
1078                 *size += size_cpus;
1079                 *type  = PERF_CPU_MAP__CPUS;
1080         } else {
1081                 *size += size_mask;
1082                 *type  = PERF_CPU_MAP__MASK;
1083         }
1084
1085         *size += sizeof(struct cpu_map_data);
1086         *size = PERF_ALIGN(*size, sizeof(u64));
1087         return zalloc(*size);
1088 }
1089
1090 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1091                               u16 type, int max)
1092 {
1093         data->type = type;
1094
1095         switch (type) {
1096         case PERF_CPU_MAP__CPUS:
1097                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1098                 break;
1099         case PERF_CPU_MAP__MASK:
1100                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1101         default:
1102                 break;
1103         };
1104 }
1105
1106 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1107 {
1108         size_t size = sizeof(struct cpu_map_event);
1109         struct cpu_map_event *event;
1110         int max;
1111         u16 type;
1112
1113         event = cpu_map_data__alloc(map, &size, &type, &max);
1114         if (!event)
1115                 return NULL;
1116
1117         event->header.type = PERF_RECORD_CPU_MAP;
1118         event->header.size = size;
1119         event->data.type   = type;
1120
1121         cpu_map_data__synthesize(&event->data, map, type, max);
1122         return event;
1123 }
1124
1125 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1126                                    struct cpu_map *map,
1127                                    perf_event__handler_t process,
1128                                    struct machine *machine)
1129 {
1130         struct cpu_map_event *event;
1131         int err;
1132
1133         event = cpu_map_event__new(map);
1134         if (!event)
1135                 return -ENOMEM;
1136
1137         err = process(tool, (union perf_event *) event, NULL, machine);
1138
1139         free(event);
1140         return err;
1141 }
1142
1143 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1144                                        struct perf_stat_config *config,
1145                                        perf_event__handler_t process,
1146                                        struct machine *machine)
1147 {
1148         struct stat_config_event *event;
1149         int size, i = 0, err;
1150
1151         size  = sizeof(*event);
1152         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1153
1154         event = zalloc(size);
1155         if (!event)
1156                 return -ENOMEM;
1157
1158         event->header.type = PERF_RECORD_STAT_CONFIG;
1159         event->header.size = size;
1160         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1161
1162 #define ADD(__term, __val)                                      \
1163         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1164         event->data[i].val = __val;                             \
1165         i++;
1166
1167         ADD(AGGR_MODE,  config->aggr_mode)
1168         ADD(INTERVAL,   config->interval)
1169         ADD(SCALE,      config->scale)
1170
1171         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1172                   "stat config terms unbalanced\n");
1173 #undef ADD
1174
1175         err = process(tool, (union perf_event *) event, NULL, machine);
1176
1177         free(event);
1178         return err;
1179 }
1180
1181 int perf_event__synthesize_stat(struct perf_tool *tool,
1182                                 u32 cpu, u32 thread, u64 id,
1183                                 struct perf_counts_values *count,
1184                                 perf_event__handler_t process,
1185                                 struct machine *machine)
1186 {
1187         struct stat_event event;
1188
1189         event.header.type = PERF_RECORD_STAT;
1190         event.header.size = sizeof(event);
1191         event.header.misc = 0;
1192
1193         event.id        = id;
1194         event.cpu       = cpu;
1195         event.thread    = thread;
1196         event.val       = count->val;
1197         event.ena       = count->ena;
1198         event.run       = count->run;
1199
1200         return process(tool, (union perf_event *) &event, NULL, machine);
1201 }
1202
1203 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1204                                       u64 evtime, u64 type,
1205                                       perf_event__handler_t process,
1206                                       struct machine *machine)
1207 {
1208         struct stat_round_event event;
1209
1210         event.header.type = PERF_RECORD_STAT_ROUND;
1211         event.header.size = sizeof(event);
1212         event.header.misc = 0;
1213
1214         event.time = evtime;
1215         event.type = type;
1216
1217         return process(tool, (union perf_event *) &event, NULL, machine);
1218 }
1219
1220 void perf_event__read_stat_config(struct perf_stat_config *config,
1221                                   struct stat_config_event *event)
1222 {
1223         unsigned i;
1224
1225         for (i = 0; i < event->nr; i++) {
1226
1227                 switch (event->data[i].tag) {
1228 #define CASE(__term, __val)                                     \
1229                 case PERF_STAT_CONFIG_TERM__##__term:           \
1230                         config->__val = event->data[i].val;     \
1231                         break;
1232
1233                 CASE(AGGR_MODE, aggr_mode)
1234                 CASE(SCALE,     scale)
1235                 CASE(INTERVAL,  interval)
1236 #undef CASE
1237                 default:
1238                         pr_warning("unknown stat config term %" PRIu64 "\n",
1239                                    event->data[i].tag);
1240                 }
1241         }
1242 }
1243
1244 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1245 {
1246         const char *s;
1247
1248         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1249                 s = " exec";
1250         else
1251                 s = "";
1252
1253         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1254 }
1255
1256 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1257 {
1258         size_t ret = 0;
1259         struct perf_ns_link_info *ns_link_info;
1260         u32 nr_namespaces, idx;
1261
1262         ns_link_info = event->namespaces.link_info;
1263         nr_namespaces = event->namespaces.nr_namespaces;
1264
1265         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1266                        event->namespaces.pid,
1267                        event->namespaces.tid,
1268                        nr_namespaces);
1269
1270         for (idx = 0; idx < nr_namespaces; idx++) {
1271                 if (idx && (idx % 4 == 0))
1272                         ret += fprintf(fp, "\n\t\t ");
1273
1274                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1275                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1276                                 (u64)ns_link_info[idx].ino,
1277                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1278         }
1279
1280         return ret;
1281 }
1282
1283 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1284                              union perf_event *event,
1285                              struct perf_sample *sample,
1286                              struct machine *machine)
1287 {
1288         return machine__process_comm_event(machine, event, sample);
1289 }
1290
1291 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1292                                    union perf_event *event,
1293                                    struct perf_sample *sample,
1294                                    struct machine *machine)
1295 {
1296         return machine__process_namespaces_event(machine, event, sample);
1297 }
1298
1299 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1300                              union perf_event *event,
1301                              struct perf_sample *sample,
1302                              struct machine *machine)
1303 {
1304         return machine__process_lost_event(machine, event, sample);
1305 }
1306
1307 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1308                             union perf_event *event,
1309                             struct perf_sample *sample __maybe_unused,
1310                             struct machine *machine)
1311 {
1312         return machine__process_aux_event(machine, event);
1313 }
1314
1315 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1316                                      union perf_event *event,
1317                                      struct perf_sample *sample __maybe_unused,
1318                                      struct machine *machine)
1319 {
1320         return machine__process_itrace_start_event(machine, event);
1321 }
1322
1323 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1324                                      union perf_event *event,
1325                                      struct perf_sample *sample,
1326                                      struct machine *machine)
1327 {
1328         return machine__process_lost_samples_event(machine, event, sample);
1329 }
1330
1331 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1332                                union perf_event *event,
1333                                struct perf_sample *sample __maybe_unused,
1334                                struct machine *machine)
1335 {
1336         return machine__process_switch_event(machine, event);
1337 }
1338
1339 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
1340                                 union perf_event *event,
1341                                 struct perf_sample *sample __maybe_unused,
1342                                 struct machine *machine)
1343 {
1344         return machine__process_ksymbol(machine, event, sample);
1345 }
1346
1347 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused,
1348                                   union perf_event *event,
1349                                   struct perf_sample *sample __maybe_unused,
1350                                   struct machine *machine)
1351 {
1352         return machine__process_bpf_event(machine, event, sample);
1353 }
1354
1355 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1356 {
1357         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1358                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1359                        event->mmap.len, event->mmap.pgoff,
1360                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1361                        event->mmap.filename);
1362 }
1363
1364 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1365 {
1366         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1367                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1368                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1369                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1370                        event->mmap2.min, event->mmap2.ino,
1371                        event->mmap2.ino_generation,
1372                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1373                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1374                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1375                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1376                        event->mmap2.filename);
1377 }
1378
1379 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1380 {
1381         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1382         size_t ret;
1383
1384         ret = fprintf(fp, " nr: ");
1385
1386         if (threads)
1387                 ret += thread_map__fprintf(threads, fp);
1388         else
1389                 ret += fprintf(fp, "failed to get threads from event\n");
1390
1391         thread_map__put(threads);
1392         return ret;
1393 }
1394
1395 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1396 {
1397         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1398         size_t ret;
1399
1400         ret = fprintf(fp, ": ");
1401
1402         if (cpus)
1403                 ret += cpu_map__fprintf(cpus, fp);
1404         else
1405                 ret += fprintf(fp, "failed to get cpumap from event\n");
1406
1407         cpu_map__put(cpus);
1408         return ret;
1409 }
1410
1411 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1412                              union perf_event *event,
1413                              struct perf_sample *sample,
1414                              struct machine *machine)
1415 {
1416         return machine__process_mmap_event(machine, event, sample);
1417 }
1418
1419 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1420                              union perf_event *event,
1421                              struct perf_sample *sample,
1422                              struct machine *machine)
1423 {
1424         return machine__process_mmap2_event(machine, event, sample);
1425 }
1426
1427 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1428 {
1429         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1430                        event->fork.pid, event->fork.tid,
1431                        event->fork.ppid, event->fork.ptid);
1432 }
1433
1434 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1435                              union perf_event *event,
1436                              struct perf_sample *sample,
1437                              struct machine *machine)
1438 {
1439         return machine__process_fork_event(machine, event, sample);
1440 }
1441
1442 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1443                              union perf_event *event,
1444                              struct perf_sample *sample,
1445                              struct machine *machine)
1446 {
1447         return machine__process_exit_event(machine, event, sample);
1448 }
1449
1450 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1451 {
1452         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1453                        event->aux.aux_offset, event->aux.aux_size,
1454                        event->aux.flags,
1455                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1456                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1457                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1458 }
1459
1460 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1461 {
1462         return fprintf(fp, " pid: %u tid: %u\n",
1463                        event->itrace_start.pid, event->itrace_start.tid);
1464 }
1465
1466 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1467 {
1468         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1469         const char *in_out = !out ? "IN         " :
1470                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1471                                     "OUT        " : "OUT preempt";
1472
1473         if (event->header.type == PERF_RECORD_SWITCH)
1474                 return fprintf(fp, " %s\n", in_out);
1475
1476         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1477                        in_out, out ? "next" : "prev",
1478                        event->context_switch.next_prev_pid,
1479                        event->context_switch.next_prev_tid);
1480 }
1481
1482 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1483 {
1484         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1485 }
1486
1487 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
1488 {
1489         return fprintf(fp, " ksymbol event with addr %" PRIx64 " len %u type %u flags 0x%x name %s\n",
1490                        event->ksymbol_event.addr, event->ksymbol_event.len,
1491                        event->ksymbol_event.ksym_type,
1492                        event->ksymbol_event.flags, event->ksymbol_event.name);
1493 }
1494
1495 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp)
1496 {
1497         return fprintf(fp, " bpf event with type %u, flags %u, id %u\n",
1498                        event->bpf_event.type, event->bpf_event.flags,
1499                        event->bpf_event.id);
1500 }
1501
1502 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1503 {
1504         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1505                              perf_event__name(event->header.type));
1506
1507         switch (event->header.type) {
1508         case PERF_RECORD_COMM:
1509                 ret += perf_event__fprintf_comm(event, fp);
1510                 break;
1511         case PERF_RECORD_FORK:
1512         case PERF_RECORD_EXIT:
1513                 ret += perf_event__fprintf_task(event, fp);
1514                 break;
1515         case PERF_RECORD_MMAP:
1516                 ret += perf_event__fprintf_mmap(event, fp);
1517                 break;
1518         case PERF_RECORD_NAMESPACES:
1519                 ret += perf_event__fprintf_namespaces(event, fp);
1520                 break;
1521         case PERF_RECORD_MMAP2:
1522                 ret += perf_event__fprintf_mmap2(event, fp);
1523                 break;
1524         case PERF_RECORD_AUX:
1525                 ret += perf_event__fprintf_aux(event, fp);
1526                 break;
1527         case PERF_RECORD_ITRACE_START:
1528                 ret += perf_event__fprintf_itrace_start(event, fp);
1529                 break;
1530         case PERF_RECORD_SWITCH:
1531         case PERF_RECORD_SWITCH_CPU_WIDE:
1532                 ret += perf_event__fprintf_switch(event, fp);
1533                 break;
1534         case PERF_RECORD_LOST:
1535                 ret += perf_event__fprintf_lost(event, fp);
1536                 break;
1537         case PERF_RECORD_KSYMBOL:
1538                 ret += perf_event__fprintf_ksymbol(event, fp);
1539                 break;
1540         case PERF_RECORD_BPF_EVENT:
1541                 ret += perf_event__fprintf_bpf_event(event, fp);
1542                 break;
1543         default:
1544                 ret += fprintf(fp, "\n");
1545         }
1546
1547         return ret;
1548 }
1549
1550 int perf_event__process(struct perf_tool *tool __maybe_unused,
1551                         union perf_event *event,
1552                         struct perf_sample *sample,
1553                         struct machine *machine)
1554 {
1555         return machine__process_event(machine, event, sample);
1556 }
1557
1558 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1559                              struct addr_location *al)
1560 {
1561         struct map_groups *mg = thread->mg;
1562         struct machine *machine = mg->machine;
1563         bool load_map = false;
1564
1565         al->machine = machine;
1566         al->thread = thread;
1567         al->addr = addr;
1568         al->cpumode = cpumode;
1569         al->filtered = 0;
1570
1571         if (machine == NULL) {
1572                 al->map = NULL;
1573                 return NULL;
1574         }
1575
1576         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1577                 al->level = 'k';
1578                 mg = &machine->kmaps;
1579                 load_map = true;
1580         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1581                 al->level = '.';
1582         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1583                 al->level = 'g';
1584                 mg = &machine->kmaps;
1585                 load_map = true;
1586         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1587                 al->level = 'u';
1588         } else {
1589                 al->level = 'H';
1590                 al->map = NULL;
1591
1592                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1593                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1594                         !perf_guest)
1595                         al->filtered |= (1 << HIST_FILTER__GUEST);
1596                 if ((cpumode == PERF_RECORD_MISC_USER ||
1597                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1598                         !perf_host)
1599                         al->filtered |= (1 << HIST_FILTER__HOST);
1600
1601                 return NULL;
1602         }
1603
1604         al->map = map_groups__find(mg, al->addr);
1605         if (al->map != NULL) {
1606                 /*
1607                  * Kernel maps might be changed when loading symbols so loading
1608                  * must be done prior to using kernel maps.
1609                  */
1610                 if (load_map)
1611                         map__load(al->map);
1612                 al->addr = al->map->map_ip(al->map, al->addr);
1613         }
1614
1615         return al->map;
1616 }
1617
1618 /*
1619  * For branch stacks or branch samples, the sample cpumode might not be correct
1620  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1621  * branch stack addresses. If possible, use a fallback to deal with those cases.
1622  */
1623 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1624                                 struct addr_location *al)
1625 {
1626         struct map *map = thread__find_map(thread, cpumode, addr, al);
1627         struct machine *machine = thread->mg->machine;
1628         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1629
1630         if (map || addr_cpumode == cpumode)
1631                 return map;
1632
1633         return thread__find_map(thread, addr_cpumode, addr, al);
1634 }
1635
1636 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1637                                    u64 addr, struct addr_location *al)
1638 {
1639         al->sym = NULL;
1640         if (thread__find_map(thread, cpumode, addr, al))
1641                 al->sym = map__find_symbol(al->map, al->addr);
1642         return al->sym;
1643 }
1644
1645 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1646                                       u64 addr, struct addr_location *al)
1647 {
1648         al->sym = NULL;
1649         if (thread__find_map_fb(thread, cpumode, addr, al))
1650                 al->sym = map__find_symbol(al->map, al->addr);
1651         return al->sym;
1652 }
1653
1654 /*
1655  * Callers need to drop the reference to al->thread, obtained in
1656  * machine__findnew_thread()
1657  */
1658 int machine__resolve(struct machine *machine, struct addr_location *al,
1659                      struct perf_sample *sample)
1660 {
1661         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1662                                                         sample->tid);
1663
1664         if (thread == NULL)
1665                 return -1;
1666
1667         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1668         thread__find_map(thread, sample->cpumode, sample->ip, al);
1669         dump_printf(" ...... dso: %s\n",
1670                     al->map ? al->map->dso->long_name :
1671                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1672
1673         if (thread__is_filtered(thread))
1674                 al->filtered |= (1 << HIST_FILTER__THREAD);
1675
1676         al->sym = NULL;
1677         al->cpu = sample->cpu;
1678         al->socket = -1;
1679         al->srcline = NULL;
1680
1681         if (al->cpu >= 0) {
1682                 struct perf_env *env = machine->env;
1683
1684                 if (env && env->cpu)
1685                         al->socket = env->cpu[al->cpu].socket_id;
1686         }
1687
1688         if (al->map) {
1689                 struct dso *dso = al->map->dso;
1690
1691                 if (symbol_conf.dso_list &&
1692                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1693                                                   dso->short_name) ||
1694                                (dso->short_name != dso->long_name &&
1695                                 strlist__has_entry(symbol_conf.dso_list,
1696                                                    dso->long_name))))) {
1697                         al->filtered |= (1 << HIST_FILTER__DSO);
1698                 }
1699
1700                 al->sym = map__find_symbol(al->map, al->addr);
1701         }
1702
1703         if (symbol_conf.sym_list &&
1704                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1705                                                 al->sym->name))) {
1706                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1707         }
1708
1709         return 0;
1710 }
1711
1712 /*
1713  * The preprocess_sample method will return with reference counts for the
1714  * in it, when done using (and perhaps getting ref counts if needing to
1715  * keep a pointer to one of those entries) it must be paired with
1716  * addr_location__put(), so that the refcounts can be decremented.
1717  */
1718 void addr_location__put(struct addr_location *al)
1719 {
1720         thread__zput(al->thread);
1721 }
1722
1723 bool is_bts_event(struct perf_event_attr *attr)
1724 {
1725         return attr->type == PERF_TYPE_HARDWARE &&
1726                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1727                attr->sample_period == 1;
1728 }
1729
1730 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1731 {
1732         if (attr->type == PERF_TYPE_SOFTWARE &&
1733             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1734              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1735              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1736                 return true;
1737
1738         if (is_bts_event(attr))
1739                 return true;
1740
1741         return false;
1742 }
1743
1744 void thread__resolve(struct thread *thread, struct addr_location *al,
1745                      struct perf_sample *sample)
1746 {
1747         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1748
1749         al->cpu = sample->cpu;
1750         al->sym = NULL;
1751
1752         if (al->map)
1753                 al->sym = map__find_symbol(al->map, al->addr);
1754 }