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 <linux/zalloc.h>
  15 #include "event.h"
  16 #include "debug.h"
  17 #include "hist.h"
  18 #include "machine.h"
  19 #include "sort.h"
  20 #include "string2.h"
  21 #include "strlist.h"
  22 #include "thread.h"
  23 #include "thread_map.h"
  24 #include <linux/ctype.h>
  25 #include "map.h"
  26 #include "symbol.h"
  27 #include "symbol/kallsyms.h"
  28 #include "asm/bug.h"
  29 #include "stat.h"
  30 #include "session.h"
  31 #include "bpf-event.h"
  32
  33 #define DEFAULT_PROC_MAP_PARSE_TIMEOUT 500
  34
  35 static const char *perf_event__names[] = {
  36         [0]                                     = "TOTAL",
  37         [PERF_RECORD_MMAP]                      = "MMAP",
  38         [PERF_RECORD_MMAP2]                     = "MMAP2",
  39         [PERF_RECORD_LOST]                      = "LOST",
  40         [PERF_RECORD_COMM]                      = "COMM",
  41         [PERF_RECORD_EXIT]                      = "EXIT",
  42         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  43         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  44         [PERF_RECORD_FORK]                      = "FORK",
  45         [PERF_RECORD_READ]                      = "READ",
  46         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  47         [PERF_RECORD_AUX]                       = "AUX",
  48         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  49         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  50         [PERF_RECORD_SWITCH]                    = "SWITCH",
  51         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  52         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  53         [PERF_RECORD_KSYMBOL]                   = "KSYMBOL",
  54         [PERF_RECORD_BPF_EVENT]                 = "BPF_EVENT",
  55         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  56         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  57         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  58         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  59         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  60         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  61         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  62         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  63         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  64         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  65         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  66         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  67         [PERF_RECORD_STAT]                      = "STAT",
  68         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  69         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  70         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  71         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  72         [PERF_RECORD_COMPRESSED]                = "COMPRESSED",
  73 };
  74
  75 static const char *perf_ns__names[] = {
  76         [NET_NS_INDEX]          = "net",
  77         [UTS_NS_INDEX]          = "uts",
  78         [IPC_NS_INDEX]          = "ipc",
  79         [PID_NS_INDEX]          = "pid",
  80         [USER_NS_INDEX]         = "user",
  81         [MNT_NS_INDEX]          = "mnt",
  82         [CGROUP_NS_INDEX]       = "cgroup",
  83 };
  84
  85 unsigned int proc_map_timeout = DEFAULT_PROC_MAP_PARSE_TIMEOUT;
  86
  87 const char *perf_event__name(unsigned int id)
  88 {
  89         if (id >= ARRAY_SIZE(perf_event__names))
  90                 return "INVALID";
  91         if (!perf_event__names[id])
  92                 return "UNKNOWN";
  93         return perf_event__names[id];
  94 }
  95
  96 static const char *perf_ns__name(unsigned int id)
  97 {
  98         if (id >= ARRAY_SIZE(perf_ns__names))
  99                 return "UNKNOWN";
 100         return perf_ns__names[id];
 101 }
 102
 103 int perf_tool__process_synth_event(struct perf_tool *tool,
 104                                    union perf_event *event,
 105                                    struct machine *machine,
 106                                    perf_event__handler_t process)
 107 {
 108         struct perf_sample synth_sample = {
 109         .pid       = -1,
 110         .tid       = -1,
 111         .time      = -1,
 112         .stream_id = -1,
 113         .cpu       = -1,
 114         .period    = 1,
 115         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 116         };
 117
 118         return process(tool, event, &synth_sample, machine);
 119 };
 120
 121 /*
 122  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 123  * the comm, tgid and ppid.
 124  */
 125 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 126                                     pid_t *tgid, pid_t *ppid)
 127 {
 128         char filename[PATH_MAX];
 129         char bf[4096];
 130         int fd;
 131         size_t size = 0;
 132         ssize_t n;
 133         char *name, *tgids, *ppids;
 134
 135         *tgid = -1;
 136         *ppid = -1;
 137
 138         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 139
 140         fd = open(filename, O_RDONLY);
 141         if (fd < 0) {
 142                 pr_debug("couldn't open %s\n", filename);
 143                 return -1;
 144         }
 145
 146         n = read(fd, bf, sizeof(bf) - 1);
 147         close(fd);
 148         if (n <= 0) {
 149                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 150                            pid);
 151                 return -1;
 152         }
 153         bf[n] = '\0';
 154
 155         name = strstr(bf, "Name:");
 156         tgids = strstr(bf, "Tgid:");
 157         ppids = strstr(bf, "PPid:");
 158
 159         if (name) {
 160                 char *nl;
 161
 162                 name = skip_spaces(name + 5);  /* strlen("Name:") */
 163                 nl = strchr(name, '\n');
 164                 if (nl)
 165                         *nl = '\0';
 166
 167                 size = strlen(name);
 168                 if (size >= len)
 169                         size = len - 1;
 170                 memcpy(comm, name, size);
 171                 comm[size] = '\0';
 172         } else {
 173                 pr_debug("Name: string not found for pid %d\n", pid);
 174         }
 175
 176         if (tgids) {
 177                 tgids += 5;  /* strlen("Tgid:") */
 178                 *tgid = atoi(tgids);
 179         } else {
 180                 pr_debug("Tgid: string not found for pid %d\n", pid);
 181         }
 182
 183         if (ppids) {
 184                 ppids += 5;  /* strlen("PPid:") */
 185                 *ppid = atoi(ppids);
 186         } else {
 187                 pr_debug("PPid: string not found for pid %d\n", pid);
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 194                                     struct machine *machine,
 195                                     pid_t *tgid, pid_t *ppid)
 196 {
 197         size_t size;
 198
 199         *ppid = -1;
 200
 201         memset(&event->comm, 0, sizeof(event->comm));
 202
 203         if (machine__is_host(machine)) {
 204                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 205                                              sizeof(event->comm.comm),
 206                                              tgid, ppid) != 0) {
 207                         return -1;
 208                 }
 209         } else {
 210                 *tgid = machine->pid;
 211         }
 212
 213         if (*tgid < 0)
 214                 return -1;
 215
 216         event->comm.pid = *tgid;
 217         event->comm.header.type = PERF_RECORD_COMM;
 218
 219         size = strlen(event->comm.comm) + 1;
 220         size = PERF_ALIGN(size, sizeof(u64));
 221         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 222         event->comm.header.size = (sizeof(event->comm) -
 223                                 (sizeof(event->comm.comm) - size) +
 224                                 machine->id_hdr_size);
 225         event->comm.tid = pid;
 226
 227         return 0;
 228 }
 229
 230 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 231                                          union perf_event *event, pid_t pid,
 232                                          perf_event__handler_t process,
 233                                          struct machine *machine)
 234 {
 235         pid_t tgid, ppid;
 236
 237         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 238                 return -1;
 239
 240         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 241                 return -1;
 242
 243         return tgid;
 244 }
 245
 246 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 247                                          struct perf_ns_link_info *ns_link_info)
 248 {
 249         struct stat64 st;
 250         char proc_ns[128];
 251
 252         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 253         if (stat64(proc_ns, &st) == 0) {
 254                 ns_link_info->dev = st.st_dev;
 255                 ns_link_info->ino = st.st_ino;
 256         }
 257 }
 258
 259 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 260                                       union perf_event *event,
 261                                       pid_t pid, pid_t tgid,
 262                                       perf_event__handler_t process,
 263                                       struct machine *machine)
 264 {
 265         u32 idx;
 266         struct perf_ns_link_info *ns_link_info;
 267
 268         if (!tool || !tool->namespace_events)
 269                 return 0;
 270
 271         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 272                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 273                machine->id_hdr_size));
 274
 275         event->namespaces.pid = tgid;
 276         event->namespaces.tid = pid;
 277
 278         event->namespaces.nr_namespaces = NR_NAMESPACES;
 279
 280         ns_link_info = event->namespaces.link_info;
 281
 282         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 283                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 284                                              &ns_link_info[idx]);
 285
 286         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 287
 288         event->namespaces.header.size = (sizeof(event->namespaces) +
 289                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 290                         machine->id_hdr_size);
 291
 292         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 293                 return -1;
 294
 295         return 0;
 296 }
 297
 298 static int perf_event__synthesize_fork(struct perf_tool *tool,
 299                                        union perf_event *event,
 300                                        pid_t pid, pid_t tgid, pid_t ppid,
 301                                        perf_event__handler_t process,
 302                                        struct machine *machine)
 303 {
 304         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 305
 306         /*
 307          * for main thread set parent to ppid from status file. For other
 308          * threads set parent pid to main thread. ie., assume main thread
 309          * spawns all threads in a process
 310         */
 311         if (tgid == pid) {
 312                 event->fork.ppid = ppid;
 313                 event->fork.ptid = ppid;
 314         } else {
 315                 event->fork.ppid = tgid;
 316                 event->fork.ptid = tgid;
 317         }
 318         event->fork.pid  = tgid;
 319         event->fork.tid  = pid;
 320         event->fork.header.type = PERF_RECORD_FORK;
 321         event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 322
 323         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 324
 325         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 326                 return -1;
 327
 328         return 0;
 329 }
 330
 331 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 332                                        union perf_event *event,
 333                                        pid_t pid, pid_t tgid,
 334                                        perf_event__handler_t process,
 335                                        struct machine *machine,
 336                                        bool mmap_data)
 337 {
 338         char filename[PATH_MAX];
 339         FILE *fp;
 340         unsigned long long t;
 341         bool truncation = false;
 342         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 343         int rc = 0;
 344         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 345         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 346
 347         if (machine__is_default_guest(machine))
 348                 return 0;
 349
 350         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 351                  machine->root_dir, pid, pid);
 352
 353         fp = fopen(filename, "r");
 354         if (fp == NULL) {
 355                 /*
 356                  * We raced with a task exiting - just return:
 357                  */
 358                 pr_debug("couldn't open %s\n", filename);
 359                 return -1;
 360         }
 361
 362         event->header.type = PERF_RECORD_MMAP2;
 363         t = rdclock();
 364
 365         while (1) {
 366                 char bf[BUFSIZ];
 367                 char prot[5];
 368                 char execname[PATH_MAX];
 369                 char anonstr[] = "//anon";
 370                 unsigned int ino;
 371                 size_t size;
 372                 ssize_t n;
 373
 374                 if (fgets(bf, sizeof(bf), fp) == NULL)
 375                         break;
 376
 377                 if ((rdclock() - t) > timeout) {
 378                         pr_warning("Reading %s time out. "
 379                                    "You may want to increase "
 380                                    "the time limit by --proc-map-timeout\n",
 381                                    filename);
 382                         truncation = true;
 383                         goto out;
 384                 }
 385
 386                 /* ensure null termination since stack will be reused. */
 387                 strcpy(execname, "");
 388
 389                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 390                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 391                        &event->mmap2.start, &event->mmap2.len, prot,
 392                        &event->mmap2.pgoff, &event->mmap2.maj,
 393                        &event->mmap2.min,
 394                        &ino, execname);
 395
 396                 /*
 397                  * Anon maps don't have the execname.
 398                  */
 399                 if (n < 7)
 400                         continue;
 401
 402                 event->mmap2.ino = (u64)ino;
 403
 404                 /*
 405                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 406                  */
 407                 if (machine__is_host(machine))
 408                         event->header.misc = PERF_RECORD_MISC_USER;
 409                 else
 410                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 411
 412                 /* map protection and flags bits */
 413                 event->mmap2.prot = 0;
 414                 event->mmap2.flags = 0;
 415                 if (prot[0] == 'r')
 416                         event->mmap2.prot |= PROT_READ;
 417                 if (prot[1] == 'w')
 418                         event->mmap2.prot |= PROT_WRITE;
 419                 if (prot[2] == 'x')
 420                         event->mmap2.prot |= PROT_EXEC;
 421
 422                 if (prot[3] == 's')
 423                         event->mmap2.flags |= MAP_SHARED;
 424                 else
 425                         event->mmap2.flags |= MAP_PRIVATE;
 426
 427                 if (prot[2] != 'x') {
 428                         if (!mmap_data || prot[0] != 'r')
 429                                 continue;
 430
 431                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 432                 }
 433
 434 out:
 435                 if (truncation)
 436                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 437
 438                 if (!strcmp(execname, ""))
 439                         strcpy(execname, anonstr);
 440
 441                 if (hugetlbfs_mnt_len &&
 442                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 443                         strcpy(execname, anonstr);
 444                         event->mmap2.flags |= MAP_HUGETLB;
 445                 }
 446
 447                 size = strlen(execname) + 1;
 448                 memcpy(event->mmap2.filename, execname, size);
 449                 size = PERF_ALIGN(size, sizeof(u64));
 450                 event->mmap2.len -= event->mmap.start;
 451                 event->mmap2.header.size = (sizeof(event->mmap2) -
 452                                         (sizeof(event->mmap2.filename) - size));
 453                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 454                 event->mmap2.header.size += machine->id_hdr_size;
 455                 event->mmap2.pid = tgid;
 456                 event->mmap2.tid = pid;
 457
 458                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 459                         rc = -1;
 460                         break;
 461                 }
 462
 463                 if (truncation)
 464                         break;
 465         }
 466
 467         fclose(fp);
 468         return rc;
 469 }
 470
 471 int perf_event__synthesize_modules(struct perf_tool *tool,
 472                                    perf_event__handler_t process,
 473                                    struct machine *machine)
 474 {
 475         int rc = 0;
 476         struct map *pos;
 477         struct maps *maps = machine__kernel_maps(machine);
 478         union perf_event *event = zalloc((sizeof(event->mmap) +
 479                                           machine->id_hdr_size));
 480         if (event == NULL) {
 481                 pr_debug("Not enough memory synthesizing mmap event "
 482                          "for kernel modules\n");
 483                 return -1;
 484         }
 485
 486         event->header.type = PERF_RECORD_MMAP;
 487
 488         /*
 489          * kernel uses 0 for user space maps, see kernel/perf_event.c
 490          * __perf_event_mmap
 491          */
 492         if (machine__is_host(machine))
 493                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 494         else
 495                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 496
 497         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 498                 size_t size;
 499
 500                 if (!__map__is_kmodule(pos))
 501                         continue;
 502
 503                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 504                 event->mmap.header.type = PERF_RECORD_MMAP;
 505                 event->mmap.header.size = (sizeof(event->mmap) -
 506                                         (sizeof(event->mmap.filename) - size));
 507                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 508                 event->mmap.header.size += machine->id_hdr_size;
 509                 event->mmap.start = pos->start;
 510                 event->mmap.len   = pos->end - pos->start;
 511                 event->mmap.pid   = machine->pid;
 512
 513                 memcpy(event->mmap.filename, pos->dso->long_name,
 514                        pos->dso->long_name_len + 1);
 515                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 516                         rc = -1;
 517                         break;
 518                 }
 519         }
 520
 521         free(event);
 522         return rc;
 523 }
 524
 525 static int __event__synthesize_thread(union perf_event *comm_event,
 526                                       union perf_event *mmap_event,
 527                                       union perf_event *fork_event,
 528                                       union perf_event *namespaces_event,
 529                                       pid_t pid, int full,
 530                                       perf_event__handler_t process,
 531                                       struct perf_tool *tool,
 532                                       struct machine *machine,
 533                                       bool mmap_data)
 534 {
 535         char filename[PATH_MAX];
 536         DIR *tasks;
 537         struct dirent *dirent;
 538         pid_t tgid, ppid;
 539         int rc = 0;
 540
 541         /* special case: only send one comm event using passed in pid */
 542         if (!full) {
 543                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 544                                                    process, machine);
 545
 546                 if (tgid == -1)
 547                         return -1;
 548
 549                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 550                                                       tgid, process, machine) < 0)
 551                         return -1;
 552
 553                 /*
 554                  * send mmap only for thread group leader
 555                  * see thread__init_map_groups
 556                  */
 557                 if (pid == tgid &&
 558                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 559                                                        process, machine, mmap_data))
 560                         return -1;
 561
 562                 return 0;
 563         }
 564
 565         if (machine__is_default_guest(machine))
 566                 return 0;
 567
 568         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 569                  machine->root_dir, pid);
 570
 571         tasks = opendir(filename);
 572         if (tasks == NULL) {
 573                 pr_debug("couldn't open %s\n", filename);
 574                 return 0;
 575         }
 576
 577         while ((dirent = readdir(tasks)) != NULL) {
 578                 char *end;
 579                 pid_t _pid;
 580
 581                 _pid = strtol(dirent->d_name, &end, 10);
 582                 if (*end)
 583                         continue;
 584
 585                 rc = -1;
 586                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 587                                              &tgid, &ppid) != 0)
 588                         break;
 589
 590                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 591                                                 ppid, process, machine) < 0)
 592                         break;
 593
 594                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 595                                                       tgid, process, machine) < 0)
 596                         break;
 597
 598                 /*
 599                  * Send the prepared comm event
 600                  */
 601                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 602                         break;
 603
 604                 rc = 0;
 605                 if (_pid == pid) {
 606                         /* process the parent's maps too */
 607                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 608                                                 process, machine, mmap_data);
 609                         if (rc)
 610                                 break;
 611                 }
 612         }
 613
 614         closedir(tasks);
 615         return rc;
 616 }
 617
 618 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 619                                       struct thread_map *threads,
 620                                       perf_event__handler_t process,
 621                                       struct machine *machine,
 622                                       bool mmap_data)
 623 {
 624         union perf_event *comm_event, *mmap_event, *fork_event;
 625         union perf_event *namespaces_event;
 626         int err = -1, thread, j;
 627
 628         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 629         if (comm_event == NULL)
 630                 goto out;
 631
 632         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 633         if (mmap_event == NULL)
 634                 goto out_free_comm;
 635
 636         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 637         if (fork_event == NULL)
 638                 goto out_free_mmap;
 639
 640         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 641                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 642                                   machine->id_hdr_size);
 643         if (namespaces_event == NULL)
 644                 goto out_free_fork;
 645
 646         err = 0;
 647         for (thread = 0; thread < threads->nr; ++thread) {
 648                 if (__event__synthesize_thread(comm_event, mmap_event,
 649                                                fork_event, namespaces_event,
 650                                                thread_map__pid(threads, thread), 0,
 651                                                process, tool, machine,
 652                                                mmap_data)) {
 653                         err = -1;
 654                         break;
 655                 }
 656
 657                 /*
 658                  * comm.pid is set to thread group id by
 659                  * perf_event__synthesize_comm
 660                  */
 661                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 662                         bool need_leader = true;
 663
 664                         /* is thread group leader in thread_map? */
 665                         for (j = 0; j < threads->nr; ++j) {
 666                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 667                                         need_leader = false;
 668                                         break;
 669                                 }
 670                         }
 671
 672                         /* if not, generate events for it */
 673                         if (need_leader &&
 674                             __event__synthesize_thread(comm_event, mmap_event,
 675                                                        fork_event, namespaces_event,
 676                                                        comm_event->comm.pid, 0,
 677                                                        process, tool, machine,
 678                                                        mmap_data)) {
 679                                 err = -1;
 680                                 break;
 681                         }
 682                 }
 683         }
 684         free(namespaces_event);
 685 out_free_fork:
 686         free(fork_event);
 687 out_free_mmap:
 688         free(mmap_event);
 689 out_free_comm:
 690         free(comm_event);
 691 out:
 692         return err;
 693 }
 694
 695 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 696                                             perf_event__handler_t process,
 697                                             struct machine *machine,
 698                                             bool mmap_data,
 699                                             struct dirent **dirent,
 700                                             int start,
 701                                             int num)
 702 {
 703         union perf_event *comm_event, *mmap_event, *fork_event;
 704         union perf_event *namespaces_event;
 705         int err = -1;
 706         char *end;
 707         pid_t pid;
 708         int i;
 709
 710         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 711         if (comm_event == NULL)
 712                 goto out;
 713
 714         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 715         if (mmap_event == NULL)
 716                 goto out_free_comm;
 717
 718         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 719         if (fork_event == NULL)
 720                 goto out_free_mmap;
 721
 722         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 723                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 724                                   machine->id_hdr_size);
 725         if (namespaces_event == NULL)
 726                 goto out_free_fork;
 727
 728         for (i = start; i < start + num; i++) {
 729                 if (!isdigit(dirent[i]->d_name[0]))
 730                         continue;
 731
 732                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 733                 /* only interested in proper numerical dirents */
 734                 if (*end)
 735                         continue;
 736                 /*
 737                  * We may race with exiting thread, so don't stop just because
 738                  * one thread couldn't be synthesized.
 739                  */
 740                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 741                                            namespaces_event, pid, 1, process,
 742                                            tool, machine, mmap_data);
 743         }
 744         err = 0;
 745
 746         free(namespaces_event);
 747 out_free_fork:
 748         free(fork_event);
 749 out_free_mmap:
 750         free(mmap_event);
 751 out_free_comm:
 752         free(comm_event);
 753 out:
 754         return err;
 755 }
 756
 757 struct synthesize_threads_arg {
 758         struct perf_tool *tool;
 759         perf_event__handler_t process;
 760         struct machine *machine;
 761         bool mmap_data;
 762         struct dirent **dirent;
 763         int num;
 764         int start;
 765 };
 766
 767 static void *synthesize_threads_worker(void *arg)
 768 {
 769         struct synthesize_threads_arg *args = arg;
 770
 771         __perf_event__synthesize_threads(args->tool, args->process,
 772                                          args->machine, args->mmap_data,
 773                                          args->dirent,
 774                                          args->start, args->num);
 775         return NULL;
 776 }
 777
 778 int perf_event__synthesize_threads(struct perf_tool *tool,
 779                                    perf_event__handler_t process,
 780                                    struct machine *machine,
 781                                    bool mmap_data,
 782                                    unsigned int nr_threads_synthesize)
 783 {
 784         struct synthesize_threads_arg *args = NULL;
 785         pthread_t *synthesize_threads = NULL;
 786         char proc_path[PATH_MAX];
 787         struct dirent **dirent;
 788         int num_per_thread;
 789         int m, n, i, j;
 790         int thread_nr;
 791         int base = 0;
 792         int err = -1;
 793
 794
 795         if (machine__is_default_guest(machine))
 796                 return 0;
 797
 798         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 799         n = scandir(proc_path, &dirent, 0, alphasort);
 800         if (n < 0)
 801                 return err;
 802
 803         if (nr_threads_synthesize == UINT_MAX)
 804                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 805         else
 806                 thread_nr = nr_threads_synthesize;
 807
 808         if (thread_nr <= 1) {
 809                 err = __perf_event__synthesize_threads(tool, process,
 810                                                        machine, mmap_data,
 811                                                        dirent, base, n);
 812                 goto free_dirent;
 813         }
 814         if (thread_nr > n)
 815                 thread_nr = n;
 816
 817         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 818         if (synthesize_threads == NULL)
 819                 goto free_dirent;
 820
 821         args = calloc(sizeof(*args), thread_nr);
 822         if (args == NULL)
 823                 goto free_threads;
 824
 825         num_per_thread = n / thread_nr;
 826         m = n % thread_nr;
 827         for (i = 0; i < thread_nr; i++) {
 828                 args[i].tool = tool;
 829                 args[i].process = process;
 830                 args[i].machine = machine;
 831                 args[i].mmap_data = mmap_data;
 832                 args[i].dirent = dirent;
 833         }
 834         for (i = 0; i < m; i++) {
 835                 args[i].num = num_per_thread + 1;
 836                 args[i].start = i * args[i].num;
 837         }
 838         if (i != 0)
 839                 base = args[i-1].start + args[i-1].num;
 840         for (j = i; j < thread_nr; j++) {
 841                 args[j].num = num_per_thread;
 842                 args[j].start = base + (j - i) * args[i].num;
 843         }
 844
 845         for (i = 0; i < thread_nr; i++) {
 846                 if (pthread_create(&synthesize_threads[i], NULL,
 847                                    synthesize_threads_worker, &args[i]))
 848                         goto out_join;
 849         }
 850         err = 0;
 851 out_join:
 852         for (i = 0; i < thread_nr; i++)
 853                 pthread_join(synthesize_threads[i], NULL);
 854         free(args);
 855 free_threads:
 856         free(synthesize_threads);
 857 free_dirent:
 858         for (i = 0; i < n; i++)
 859                 zfree(&dirent[i]);
 860         free(dirent);
 861
 862         return err;
 863 }
 864
 865 struct process_symbol_args {
 866         const char *name;
 867         u64        start;
 868 };
 869
 870 static int find_symbol_cb(void *arg, const char *name, char type,
 871                           u64 start)
 872 {
 873         struct process_symbol_args *args = arg;
 874
 875         /*
 876          * Must be a function or at least an alias, as in PARISC64, where "_text" is
 877          * an 'A' to the same address as "_stext".
 878          */
 879         if (!(kallsyms__is_function(type) ||
 880               type == 'A') || strcmp(name, args->name))
 881                 return 0;
 882
 883         args->start = start;
 884         return 1;
 885 }
 886
 887 int kallsyms__get_function_start(const char *kallsyms_filename,
 888                                  const char *symbol_name, u64 *addr)
 889 {
 890         struct process_symbol_args args = { .name = symbol_name, };
 891
 892         if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
 893                 return -1;
 894
 895         *addr = args.start;
 896         return 0;
 897 }
 898
 899 int __weak perf_event__synthesize_extra_kmaps(struct perf_tool *tool __maybe_unused,
 900                                               perf_event__handler_t process __maybe_unused,
 901                                               struct machine *machine __maybe_unused)
 902 {
 903         return 0;
 904 }
 905
 906 static int __perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 907                                                 perf_event__handler_t process,
 908                                                 struct machine *machine)
 909 {
 910         size_t size;
 911         struct map *map = machine__kernel_map(machine);
 912         struct kmap *kmap;
 913         int err;
 914         union perf_event *event;
 915
 916         if (symbol_conf.kptr_restrict)
 917                 return -1;
 918         if (map == NULL)
 919                 return -1;
 920
 921         /*
 922          * We should get this from /sys/kernel/sections/.text, but till that is
 923          * available use this, and after it is use this as a fallback for older
 924          * kernels.
 925          */
 926         event = zalloc((sizeof(event->mmap) + machine->id_hdr_size));
 927         if (event == NULL) {
 928                 pr_debug("Not enough memory synthesizing mmap event "
 929                          "for kernel modules\n");
 930                 return -1;
 931         }
 932
 933         if (machine__is_host(machine)) {
 934                 /*
 935                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
 936                  * see kernel/perf_event.c __perf_event_mmap
 937                  */
 938                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 939         } else {
 940                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 941         }
 942
 943         kmap = map__kmap(map);
 944         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
 945                         "%s%s", machine->mmap_name, kmap->ref_reloc_sym->name) + 1;
 946         size = PERF_ALIGN(size, sizeof(u64));
 947         event->mmap.header.type = PERF_RECORD_MMAP;
 948         event->mmap.header.size = (sizeof(event->mmap) -
 949                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
 950         event->mmap.pgoff = kmap->ref_reloc_sym->addr;
 951         event->mmap.start = map->start;
 952         event->mmap.len   = map->end - event->mmap.start;
 953         event->mmap.pid   = machine->pid;
 954
 955         err = perf_tool__process_synth_event(tool, event, machine, process);
 956         free(event);
 957
 958         return err;
 959 }
 960
 961 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
 962                                        perf_event__handler_t process,
 963                                        struct machine *machine)
 964 {
 965         int err;
 966
 967         err = __perf_event__synthesize_kernel_mmap(tool, process, machine);
 968         if (err < 0)
 969                 return err;
 970
 971         return perf_event__synthesize_extra_kmaps(tool, process, machine);
 972 }
 973
 974 int perf_event__synthesize_thread_map2(struct perf_tool *tool,
 975                                       struct thread_map *threads,
 976                                       perf_event__handler_t process,
 977                                       struct machine *machine)
 978 {
 979         union perf_event *event;
 980         int i, err, size;
 981
 982         size  = sizeof(event->thread_map);
 983         size += threads->nr * sizeof(event->thread_map.entries[0]);
 984
 985         event = zalloc(size);
 986         if (!event)
 987                 return -ENOMEM;
 988
 989         event->header.type = PERF_RECORD_THREAD_MAP;
 990         event->header.size = size;
 991         event->thread_map.nr = threads->nr;
 992
 993         for (i = 0; i < threads->nr; i++) {
 994                 struct thread_map_event_entry *entry = &event->thread_map.entries[i];
 995                 char *comm = thread_map__comm(threads, i);
 996
 997                 if (!comm)
 998                         comm = (char *) "";
 999
1000                 entry->pid = thread_map__pid(threads, i);
1001                 strncpy((char *) &entry->comm, comm, sizeof(entry->comm));
1002         }
1003
1004         err = process(tool, event, NULL, machine);
1005
1006         free(event);
1007         return err;
1008 }
1009
1010 static void synthesize_cpus(struct cpu_map_entries *cpus,
1011                             struct cpu_map *map)
1012 {
1013         int i;
1014
1015         cpus->nr = map->nr;
1016
1017         for (i = 0; i < map->nr; i++)
1018                 cpus->cpu[i] = map->map[i];
1019 }
1020
1021 static void synthesize_mask(struct cpu_map_mask *mask,
1022                             struct cpu_map *map, int max)
1023 {
1024         int i;
1025
1026         mask->nr = BITS_TO_LONGS(max);
1027         mask->long_size = sizeof(long);
1028
1029         for (i = 0; i < map->nr; i++)
1030                 set_bit(map->map[i], mask->mask);
1031 }
1032
1033 static size_t cpus_size(struct cpu_map *map)
1034 {
1035         return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16);
1036 }
1037
1038 static size_t mask_size(struct cpu_map *map, int *max)
1039 {
1040         int i;
1041
1042         *max = 0;
1043
1044         for (i = 0; i < map->nr; i++) {
1045                 /* bit possition of the cpu is + 1 */
1046                 int bit = map->map[i] + 1;
1047
1048                 if (bit > *max)
1049                         *max = bit;
1050         }
1051
1052         return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long);
1053 }
1054
1055 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max)
1056 {
1057         size_t size_cpus, size_mask;
1058         bool is_dummy = cpu_map__empty(map);
1059
1060         /*
1061          * Both array and mask data have variable size based
1062          * on the number of cpus and their actual values.
1063          * The size of the 'struct cpu_map_data' is:
1064          *
1065          *   array = size of 'struct cpu_map_entries' +
1066          *           number of cpus * sizeof(u64)
1067          *
1068          *   mask  = size of 'struct cpu_map_mask' +
1069          *           maximum cpu bit converted to size of longs
1070          *
1071          * and finaly + the size of 'struct cpu_map_data'.
1072          */
1073         size_cpus = cpus_size(map);
1074         size_mask = mask_size(map, max);
1075
1076         if (is_dummy || (size_cpus < size_mask)) {
1077                 *size += size_cpus;
1078                 *type  = PERF_CPU_MAP__CPUS;
1079         } else {
1080                 *size += size_mask;
1081                 *type  = PERF_CPU_MAP__MASK;
1082         }
1083
1084         *size += sizeof(struct cpu_map_data);
1085         *size = PERF_ALIGN(*size, sizeof(u64));
1086         return zalloc(*size);
1087 }
1088
1089 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map,
1090                               u16 type, int max)
1091 {
1092         data->type = type;
1093
1094         switch (type) {
1095         case PERF_CPU_MAP__CPUS:
1096                 synthesize_cpus((struct cpu_map_entries *) data->data, map);
1097                 break;
1098         case PERF_CPU_MAP__MASK:
1099                 synthesize_mask((struct cpu_map_mask *) data->data, map, max);
1100         default:
1101                 break;
1102         };
1103 }
1104
1105 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map)
1106 {
1107         size_t size = sizeof(struct cpu_map_event);
1108         struct cpu_map_event *event;
1109         int max;
1110         u16 type;
1111
1112         event = cpu_map_data__alloc(map, &size, &type, &max);
1113         if (!event)
1114                 return NULL;
1115
1116         event->header.type = PERF_RECORD_CPU_MAP;
1117         event->header.size = size;
1118         event->data.type   = type;
1119
1120         cpu_map_data__synthesize(&event->data, map, type, max);
1121         return event;
1122 }
1123
1124 int perf_event__synthesize_cpu_map(struct perf_tool *tool,
1125                                    struct cpu_map *map,
1126                                    perf_event__handler_t process,
1127                                    struct machine *machine)
1128 {
1129         struct cpu_map_event *event;
1130         int err;
1131
1132         event = cpu_map_event__new(map);
1133         if (!event)
1134                 return -ENOMEM;
1135
1136         err = process(tool, (union perf_event *) event, NULL, machine);
1137
1138         free(event);
1139         return err;
1140 }
1141
1142 int perf_event__synthesize_stat_config(struct perf_tool *tool,
1143                                        struct perf_stat_config *config,
1144                                        perf_event__handler_t process,
1145                                        struct machine *machine)
1146 {
1147         struct stat_config_event *event;
1148         int size, i = 0, err;
1149
1150         size  = sizeof(*event);
1151         size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0]));
1152
1153         event = zalloc(size);
1154         if (!event)
1155                 return -ENOMEM;
1156
1157         event->header.type = PERF_RECORD_STAT_CONFIG;
1158         event->header.size = size;
1159         event->nr          = PERF_STAT_CONFIG_TERM__MAX;
1160
1161 #define ADD(__term, __val)                                      \
1162         event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term;   \
1163         event->data[i].val = __val;                             \
1164         i++;
1165
1166         ADD(AGGR_MODE,  config->aggr_mode)
1167         ADD(INTERVAL,   config->interval)
1168         ADD(SCALE,      config->scale)
1169
1170         WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX,
1171                   "stat config terms unbalanced\n");
1172 #undef ADD
1173
1174         err = process(tool, (union perf_event *) event, NULL, machine);
1175
1176         free(event);
1177         return err;
1178 }
1179
1180 int perf_event__synthesize_stat(struct perf_tool *tool,
1181                                 u32 cpu, u32 thread, u64 id,
1182                                 struct perf_counts_values *count,
1183                                 perf_event__handler_t process,
1184                                 struct machine *machine)
1185 {
1186         struct stat_event event;
1187
1188         event.header.type = PERF_RECORD_STAT;
1189         event.header.size = sizeof(event);
1190         event.header.misc = 0;
1191
1192         event.id        = id;
1193         event.cpu       = cpu;
1194         event.thread    = thread;
1195         event.val       = count->val;
1196         event.ena       = count->ena;
1197         event.run       = count->run;
1198
1199         return process(tool, (union perf_event *) &event, NULL, machine);
1200 }
1201
1202 int perf_event__synthesize_stat_round(struct perf_tool *tool,
1203                                       u64 evtime, u64 type,
1204                                       perf_event__handler_t process,
1205                                       struct machine *machine)
1206 {
1207         struct stat_round_event event;
1208
1209         event.header.type = PERF_RECORD_STAT_ROUND;
1210         event.header.size = sizeof(event);
1211         event.header.misc = 0;
1212
1213         event.time = evtime;
1214         event.type = type;
1215
1216         return process(tool, (union perf_event *) &event, NULL, machine);
1217 }
1218
1219 void perf_event__read_stat_config(struct perf_stat_config *config,
1220                                   struct stat_config_event *event)
1221 {
1222         unsigned i;
1223
1224         for (i = 0; i < event->nr; i++) {
1225
1226                 switch (event->data[i].tag) {
1227 #define CASE(__term, __val)                                     \
1228                 case PERF_STAT_CONFIG_TERM__##__term:           \
1229                         config->__val = event->data[i].val;     \
1230                         break;
1231
1232                 CASE(AGGR_MODE, aggr_mode)
1233                 CASE(SCALE,     scale)
1234                 CASE(INTERVAL,  interval)
1235 #undef CASE
1236                 default:
1237                         pr_warning("unknown stat config term %" PRIu64 "\n",
1238                                    event->data[i].tag);
1239                 }
1240         }
1241 }
1242
1243 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
1244 {
1245         const char *s;
1246
1247         if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
1248                 s = " exec";
1249         else
1250                 s = "";
1251
1252         return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
1253 }
1254
1255 size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
1256 {
1257         size_t ret = 0;
1258         struct perf_ns_link_info *ns_link_info;
1259         u32 nr_namespaces, idx;
1260
1261         ns_link_info = event->namespaces.link_info;
1262         nr_namespaces = event->namespaces.nr_namespaces;
1263
1264         ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
1265                        event->namespaces.pid,
1266                        event->namespaces.tid,
1267                        nr_namespaces);
1268
1269         for (idx = 0; idx < nr_namespaces; idx++) {
1270                 if (idx && (idx % 4 == 0))
1271                         ret += fprintf(fp, "\n\t\t ");
1272
1273                 ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
1274                                 perf_ns__name(idx), (u64)ns_link_info[idx].dev,
1275                                 (u64)ns_link_info[idx].ino,
1276                                 ((idx + 1) != nr_namespaces) ? ", " : "]\n");
1277         }
1278
1279         return ret;
1280 }
1281
1282 int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
1283                              union perf_event *event,
1284                              struct perf_sample *sample,
1285                              struct machine *machine)
1286 {
1287         return machine__process_comm_event(machine, event, sample);
1288 }
1289
1290 int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
1291                                    union perf_event *event,
1292                                    struct perf_sample *sample,
1293                                    struct machine *machine)
1294 {
1295         return machine__process_namespaces_event(machine, event, sample);
1296 }
1297
1298 int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
1299                              union perf_event *event,
1300                              struct perf_sample *sample,
1301                              struct machine *machine)
1302 {
1303         return machine__process_lost_event(machine, event, sample);
1304 }
1305
1306 int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
1307                             union perf_event *event,
1308                             struct perf_sample *sample __maybe_unused,
1309                             struct machine *machine)
1310 {
1311         return machine__process_aux_event(machine, event);
1312 }
1313
1314 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
1315                                      union perf_event *event,
1316                                      struct perf_sample *sample __maybe_unused,
1317                                      struct machine *machine)
1318 {
1319         return machine__process_itrace_start_event(machine, event);
1320 }
1321
1322 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
1323                                      union perf_event *event,
1324                                      struct perf_sample *sample,
1325                                      struct machine *machine)
1326 {
1327         return machine__process_lost_samples_event(machine, event, sample);
1328 }
1329
1330 int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
1331                                union perf_event *event,
1332                                struct perf_sample *sample __maybe_unused,
1333                                struct machine *machine)
1334 {
1335         return machine__process_switch_event(machine, event);
1336 }
1337
1338 int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
1339                                 union perf_event *event,
1340                                 struct perf_sample *sample __maybe_unused,
1341                                 struct machine *machine)
1342 {
1343         return machine__process_ksymbol(machine, event, sample);
1344 }
1345
1346 int perf_event__process_bpf_event(struct perf_tool *tool __maybe_unused,
1347                                   union perf_event *event,
1348                                   struct perf_sample *sample __maybe_unused,
1349                                   struct machine *machine)
1350 {
1351         return machine__process_bpf_event(machine, event, sample);
1352 }
1353
1354 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1355 {
1356         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1357                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1358                        event->mmap.len, event->mmap.pgoff,
1359                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1360                        event->mmap.filename);
1361 }
1362
1363 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1364 {
1365         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1366                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1367                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1368                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1369                        event->mmap2.min, event->mmap2.ino,
1370                        event->mmap2.ino_generation,
1371                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1372                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1373                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1374                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1375                        event->mmap2.filename);
1376 }
1377
1378 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1379 {
1380         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1381         size_t ret;
1382
1383         ret = fprintf(fp, " nr: ");
1384
1385         if (threads)
1386                 ret += thread_map__fprintf(threads, fp);
1387         else
1388                 ret += fprintf(fp, "failed to get threads from event\n");
1389
1390         thread_map__put(threads);
1391         return ret;
1392 }
1393
1394 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1395 {
1396         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1397         size_t ret;
1398
1399         ret = fprintf(fp, ": ");
1400
1401         if (cpus)
1402                 ret += cpu_map__fprintf(cpus, fp);
1403         else
1404                 ret += fprintf(fp, "failed to get cpumap from event\n");
1405
1406         cpu_map__put(cpus);
1407         return ret;
1408 }
1409
1410 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1411                              union perf_event *event,
1412                              struct perf_sample *sample,
1413                              struct machine *machine)
1414 {
1415         return machine__process_mmap_event(machine, event, sample);
1416 }
1417
1418 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1419                              union perf_event *event,
1420                              struct perf_sample *sample,
1421                              struct machine *machine)
1422 {
1423         return machine__process_mmap2_event(machine, event, sample);
1424 }
1425
1426 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1427 {
1428         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1429                        event->fork.pid, event->fork.tid,
1430                        event->fork.ppid, event->fork.ptid);
1431 }
1432
1433 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1434                              union perf_event *event,
1435                              struct perf_sample *sample,
1436                              struct machine *machine)
1437 {
1438         return machine__process_fork_event(machine, event, sample);
1439 }
1440
1441 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1442                              union perf_event *event,
1443                              struct perf_sample *sample,
1444                              struct machine *machine)
1445 {
1446         return machine__process_exit_event(machine, event, sample);
1447 }
1448
1449 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1450 {
1451         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1452                        event->aux.aux_offset, event->aux.aux_size,
1453                        event->aux.flags,
1454                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1455                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1456                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1457 }
1458
1459 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1460 {
1461         return fprintf(fp, " pid: %u tid: %u\n",
1462                        event->itrace_start.pid, event->itrace_start.tid);
1463 }
1464
1465 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1466 {
1467         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1468         const char *in_out = !out ? "IN         " :
1469                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1470                                     "OUT        " : "OUT preempt";
1471
1472         if (event->header.type == PERF_RECORD_SWITCH)
1473                 return fprintf(fp, " %s\n", in_out);
1474
1475         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1476                        in_out, out ? "next" : "prev",
1477                        event->context_switch.next_prev_pid,
1478                        event->context_switch.next_prev_tid);
1479 }
1480
1481 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1482 {
1483         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1484 }
1485
1486 size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
1487 {
1488         return fprintf(fp, " addr %" PRIx64 " len %u type %u flags 0x%x name %s\n",
1489                        event->ksymbol_event.addr, event->ksymbol_event.len,
1490                        event->ksymbol_event.ksym_type,
1491                        event->ksymbol_event.flags, event->ksymbol_event.name);
1492 }
1493
1494 size_t perf_event__fprintf_bpf_event(union perf_event *event, FILE *fp)
1495 {
1496         return fprintf(fp, " type %u, flags %u, id %u\n",
1497                        event->bpf_event.type, event->bpf_event.flags,
1498                        event->bpf_event.id);
1499 }
1500
1501 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1502 {
1503         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1504                              perf_event__name(event->header.type));
1505
1506         switch (event->header.type) {
1507         case PERF_RECORD_COMM:
1508                 ret += perf_event__fprintf_comm(event, fp);
1509                 break;
1510         case PERF_RECORD_FORK:
1511         case PERF_RECORD_EXIT:
1512                 ret += perf_event__fprintf_task(event, fp);
1513                 break;
1514         case PERF_RECORD_MMAP:
1515                 ret += perf_event__fprintf_mmap(event, fp);
1516                 break;
1517         case PERF_RECORD_NAMESPACES:
1518                 ret += perf_event__fprintf_namespaces(event, fp);
1519                 break;
1520         case PERF_RECORD_MMAP2:
1521                 ret += perf_event__fprintf_mmap2(event, fp);
1522                 break;
1523         case PERF_RECORD_AUX:
1524                 ret += perf_event__fprintf_aux(event, fp);
1525                 break;
1526         case PERF_RECORD_ITRACE_START:
1527                 ret += perf_event__fprintf_itrace_start(event, fp);
1528                 break;
1529         case PERF_RECORD_SWITCH:
1530         case PERF_RECORD_SWITCH_CPU_WIDE:
1531                 ret += perf_event__fprintf_switch(event, fp);
1532                 break;
1533         case PERF_RECORD_LOST:
1534                 ret += perf_event__fprintf_lost(event, fp);
1535                 break;
1536         case PERF_RECORD_KSYMBOL:
1537                 ret += perf_event__fprintf_ksymbol(event, fp);
1538                 break;
1539         case PERF_RECORD_BPF_EVENT:
1540                 ret += perf_event__fprintf_bpf_event(event, fp);
1541                 break;
1542         default:
1543                 ret += fprintf(fp, "\n");
1544         }
1545
1546         return ret;
1547 }
1548
1549 int perf_event__process(struct perf_tool *tool __maybe_unused,
1550                         union perf_event *event,
1551                         struct perf_sample *sample,
1552                         struct machine *machine)
1553 {
1554         return machine__process_event(machine, event, sample);
1555 }
1556
1557 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1558                              struct addr_location *al)
1559 {
1560         struct map_groups *mg = thread->mg;
1561         struct machine *machine = mg->machine;
1562         bool load_map = false;
1563
1564         al->machine = machine;
1565         al->thread = thread;
1566         al->addr = addr;
1567         al->cpumode = cpumode;
1568         al->filtered = 0;
1569
1570         if (machine == NULL) {
1571                 al->map = NULL;
1572                 return NULL;
1573         }
1574
1575         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1576                 al->level = 'k';
1577                 mg = &machine->kmaps;
1578                 load_map = true;
1579         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1580                 al->level = '.';
1581         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1582                 al->level = 'g';
1583                 mg = &machine->kmaps;
1584                 load_map = true;
1585         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1586                 al->level = 'u';
1587         } else {
1588                 al->level = 'H';
1589                 al->map = NULL;
1590
1591                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1592                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1593                         !perf_guest)
1594                         al->filtered |= (1 << HIST_FILTER__GUEST);
1595                 if ((cpumode == PERF_RECORD_MISC_USER ||
1596                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1597                         !perf_host)
1598                         al->filtered |= (1 << HIST_FILTER__HOST);
1599
1600                 return NULL;
1601         }
1602
1603         al->map = map_groups__find(mg, al->addr);
1604         if (al->map != NULL) {
1605                 /*
1606                  * Kernel maps might be changed when loading symbols so loading
1607                  * must be done prior to using kernel maps.
1608                  */
1609                 if (load_map)
1610                         map__load(al->map);
1611                 al->addr = al->map->map_ip(al->map, al->addr);
1612         }
1613
1614         return al->map;
1615 }
1616
1617 /*
1618  * For branch stacks or branch samples, the sample cpumode might not be correct
1619  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1620  * branch stack addresses. If possible, use a fallback to deal with those cases.
1621  */
1622 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1623                                 struct addr_location *al)
1624 {
1625         struct map *map = thread__find_map(thread, cpumode, addr, al);
1626         struct machine *machine = thread->mg->machine;
1627         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1628
1629         if (map || addr_cpumode == cpumode)
1630                 return map;
1631
1632         return thread__find_map(thread, addr_cpumode, addr, al);
1633 }
1634
1635 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1636                                    u64 addr, struct addr_location *al)
1637 {
1638         al->sym = NULL;
1639         if (thread__find_map(thread, cpumode, addr, al))
1640                 al->sym = map__find_symbol(al->map, al->addr);
1641         return al->sym;
1642 }
1643
1644 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1645                                       u64 addr, struct addr_location *al)
1646 {
1647         al->sym = NULL;
1648         if (thread__find_map_fb(thread, cpumode, addr, al))
1649                 al->sym = map__find_symbol(al->map, al->addr);
1650         return al->sym;
1651 }
1652
1653 /*
1654  * Callers need to drop the reference to al->thread, obtained in
1655  * machine__findnew_thread()
1656  */
1657 int machine__resolve(struct machine *machine, struct addr_location *al,
1658                      struct perf_sample *sample)
1659 {
1660         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1661                                                         sample->tid);
1662
1663         if (thread == NULL)
1664                 return -1;
1665
1666         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1667         thread__find_map(thread, sample->cpumode, sample->ip, al);
1668         dump_printf(" ...... dso: %s\n",
1669                     al->map ? al->map->dso->long_name :
1670                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1671
1672         if (thread__is_filtered(thread))
1673                 al->filtered |= (1 << HIST_FILTER__THREAD);
1674
1675         al->sym = NULL;
1676         al->cpu = sample->cpu;
1677         al->socket = -1;
1678         al->srcline = NULL;
1679
1680         if (al->cpu >= 0) {
1681                 struct perf_env *env = machine->env;
1682
1683                 if (env && env->cpu)
1684                         al->socket = env->cpu[al->cpu].socket_id;
1685         }
1686
1687         if (al->map) {
1688                 struct dso *dso = al->map->dso;
1689
1690                 if (symbol_conf.dso_list &&
1691                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1692                                                   dso->short_name) ||
1693                                (dso->short_name != dso->long_name &&
1694                                 strlist__has_entry(symbol_conf.dso_list,
1695                                                    dso->long_name))))) {
1696                         al->filtered |= (1 << HIST_FILTER__DSO);
1697                 }
1698
1699                 al->sym = map__find_symbol(al->map, al->addr);
1700         }
1701
1702         if (symbol_conf.sym_list &&
1703                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1704                                                 al->sym->name))) {
1705                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1706         }
1707
1708         return 0;
1709 }
1710
1711 /*
1712  * The preprocess_sample method will return with reference counts for the
1713  * in it, when done using (and perhaps getting ref counts if needing to
1714  * keep a pointer to one of those entries) it must be paired with
1715  * addr_location__put(), so that the refcounts can be decremented.
1716  */
1717 void addr_location__put(struct addr_location *al)
1718 {
1719         thread__zput(al->thread);
1720 }
1721
1722 bool is_bts_event(struct perf_event_attr *attr)
1723 {
1724         return attr->type == PERF_TYPE_HARDWARE &&
1725                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1726                attr->sample_period == 1;
1727 }
1728
1729 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1730 {
1731         if (attr->type == PERF_TYPE_SOFTWARE &&
1732             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1733              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1734              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1735                 return true;
1736
1737         if (is_bts_event(attr))
1738                 return true;
1739
1740         return false;
1741 }
1742
1743 void thread__resolve(struct thread *thread, struct addr_location *al,
1744                      struct perf_sample *sample)
1745 {
1746         thread__find_map_fb(thread, sample->cpumode, sample->addr, al);
1747
1748         al->cpu = sample->cpu;
1749         al->sym = NULL;
1750
1751         if (al->map)
1752                 al->sym = map__find_symbol(al->map, al->addr);
1753 }