tools/perf/util/event.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <dirent.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <inttypes.h>
   6 #include <linux/kernel.h>
   7 #include <linux/types.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <unistd.h>
  11 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  12 #include <api/fs/fs.h>
  13 #include <linux/perf_event.h>
  14 #include "event.h"
  15 #include "debug.h"
  16 #include "hist.h"
  17 #include "machine.h"
  18 #include "sort.h"
  19 #include "string2.h"
  20 #include "strlist.h"
  21 #include "thread.h"
  22 #include "thread_map.h"
  23 #include "sane_ctype.h"
  24 #include "symbol/kallsyms.h"
  25 #include "asm/bug.h"
  26 #include "stat.h"
  27
  28 static const char *perf_event__names[] = {
  29         [0]                                     = "TOTAL",
  30         [PERF_RECORD_MMAP]                      = "MMAP",
  31         [PERF_RECORD_MMAP2]                     = "MMAP2",
  32         [PERF_RECORD_LOST]                      = "LOST",
  33         [PERF_RECORD_COMM]                      = "COMM",
  34         [PERF_RECORD_EXIT]                      = "EXIT",
  35         [PERF_RECORD_THROTTLE]                  = "THROTTLE",
  36         [PERF_RECORD_UNTHROTTLE]                = "UNTHROTTLE",
  37         [PERF_RECORD_FORK]                      = "FORK",
  38         [PERF_RECORD_READ]                      = "READ",
  39         [PERF_RECORD_SAMPLE]                    = "SAMPLE",
  40         [PERF_RECORD_AUX]                       = "AUX",
  41         [PERF_RECORD_ITRACE_START]              = "ITRACE_START",
  42         [PERF_RECORD_LOST_SAMPLES]              = "LOST_SAMPLES",
  43         [PERF_RECORD_SWITCH]                    = "SWITCH",
  44         [PERF_RECORD_SWITCH_CPU_WIDE]           = "SWITCH_CPU_WIDE",
  45         [PERF_RECORD_NAMESPACES]                = "NAMESPACES",
  46         [PERF_RECORD_HEADER_ATTR]               = "ATTR",
  47         [PERF_RECORD_HEADER_EVENT_TYPE]         = "EVENT_TYPE",
  48         [PERF_RECORD_HEADER_TRACING_DATA]       = "TRACING_DATA",
  49         [PERF_RECORD_HEADER_BUILD_ID]           = "BUILD_ID",
  50         [PERF_RECORD_FINISHED_ROUND]            = "FINISHED_ROUND",
  51         [PERF_RECORD_ID_INDEX]                  = "ID_INDEX",
  52         [PERF_RECORD_AUXTRACE_INFO]             = "AUXTRACE_INFO",
  53         [PERF_RECORD_AUXTRACE]                  = "AUXTRACE",
  54         [PERF_RECORD_AUXTRACE_ERROR]            = "AUXTRACE_ERROR",
  55         [PERF_RECORD_THREAD_MAP]                = "THREAD_MAP",
  56         [PERF_RECORD_CPU_MAP]                   = "CPU_MAP",
  57         [PERF_RECORD_STAT_CONFIG]               = "STAT_CONFIG",
  58         [PERF_RECORD_STAT]                      = "STAT",
  59         [PERF_RECORD_STAT_ROUND]                = "STAT_ROUND",
  60         [PERF_RECORD_EVENT_UPDATE]              = "EVENT_UPDATE",
  61         [PERF_RECORD_TIME_CONV]                 = "TIME_CONV",
  62         [PERF_RECORD_HEADER_FEATURE]            = "FEATURE",
  63 };
  64
  65 static const char *perf_ns__names[] = {
  66         [NET_NS_INDEX]          = "net",
  67         [UTS_NS_INDEX]          = "uts",
  68         [IPC_NS_INDEX]          = "ipc",
  69         [PID_NS_INDEX]          = "pid",
  70         [USER_NS_INDEX]         = "user",
  71         [MNT_NS_INDEX]          = "mnt",
  72         [CGROUP_NS_INDEX]       = "cgroup",
  73 };
  74
  75 const char *perf_event__name(unsigned int id)
  76 {
  77         if (id >= ARRAY_SIZE(perf_event__names))
  78                 return "INVALID";
  79         if (!perf_event__names[id])
  80                 return "UNKNOWN";
  81         return perf_event__names[id];
  82 }
  83
  84 static const char *perf_ns__name(unsigned int id)
  85 {
  86         if (id >= ARRAY_SIZE(perf_ns__names))
  87                 return "UNKNOWN";
  88         return perf_ns__names[id];
  89 }
  90
  91 int perf_tool__process_synth_event(struct perf_tool *tool,
  92                                    union perf_event *event,
  93                                    struct machine *machine,
  94                                    perf_event__handler_t process)
  95 {
  96         struct perf_sample synth_sample = {
  97         .pid       = -1,
  98         .tid       = -1,
  99         .time      = -1,
 100         .stream_id = -1,
 101         .cpu       = -1,
 102         .period    = 1,
 103         .cpumode   = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK,
 104         };
 105
 106         return process(tool, event, &synth_sample, machine);
 107 };
 108
 109 /*
 110  * Assumes that the first 4095 bytes of /proc/pid/stat contains
 111  * the comm, tgid and ppid.
 112  */
 113 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len,
 114                                     pid_t *tgid, pid_t *ppid)
 115 {
 116         char filename[PATH_MAX];
 117         char bf[4096];
 118         int fd;
 119         size_t size = 0;
 120         ssize_t n;
 121         char *name, *tgids, *ppids;
 122
 123         *tgid = -1;
 124         *ppid = -1;
 125
 126         snprintf(filename, sizeof(filename), "/proc/%d/status", pid);
 127
 128         fd = open(filename, O_RDONLY);
 129         if (fd < 0) {
 130                 pr_debug("couldn't open %s\n", filename);
 131                 return -1;
 132         }
 133
 134         n = read(fd, bf, sizeof(bf) - 1);
 135         close(fd);
 136         if (n <= 0) {
 137                 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
 138                            pid);
 139                 return -1;
 140         }
 141         bf[n] = '\0';
 142
 143         name = strstr(bf, "Name:");
 144         tgids = strstr(bf, "Tgid:");
 145         ppids = strstr(bf, "PPid:");
 146
 147         if (name) {
 148                 char *nl;
 149
 150                 name += 5;  /* strlen("Name:") */
 151                 name = ltrim(name);
 152
 153                 nl = strchr(name, '\n');
 154                 if (nl)
 155                         *nl = '\0';
 156
 157                 size = strlen(name);
 158                 if (size >= len)
 159                         size = len - 1;
 160                 memcpy(comm, name, size);
 161                 comm[size] = '\0';
 162         } else {
 163                 pr_debug("Name: string not found for pid %d\n", pid);
 164         }
 165
 166         if (tgids) {
 167                 tgids += 5;  /* strlen("Tgid:") */
 168                 *tgid = atoi(tgids);
 169         } else {
 170                 pr_debug("Tgid: string not found for pid %d\n", pid);
 171         }
 172
 173         if (ppids) {
 174                 ppids += 5;  /* strlen("PPid:") */
 175                 *ppid = atoi(ppids);
 176         } else {
 177                 pr_debug("PPid: string not found for pid %d\n", pid);
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int perf_event__prepare_comm(union perf_event *event, pid_t pid,
 184                                     struct machine *machine,
 185                                     pid_t *tgid, pid_t *ppid)
 186 {
 187         size_t size;
 188
 189         *ppid = -1;
 190
 191         memset(&event->comm, 0, sizeof(event->comm));
 192
 193         if (machine__is_host(machine)) {
 194                 if (perf_event__get_comm_ids(pid, event->comm.comm,
 195                                              sizeof(event->comm.comm),
 196                                              tgid, ppid) != 0) {
 197                         return -1;
 198                 }
 199         } else {
 200                 *tgid = machine->pid;
 201         }
 202
 203         if (*tgid < 0)
 204                 return -1;
 205
 206         event->comm.pid = *tgid;
 207         event->comm.header.type = PERF_RECORD_COMM;
 208
 209         size = strlen(event->comm.comm) + 1;
 210         size = PERF_ALIGN(size, sizeof(u64));
 211         memset(event->comm.comm + size, 0, machine->id_hdr_size);
 212         event->comm.header.size = (sizeof(event->comm) -
 213                                 (sizeof(event->comm.comm) - size) +
 214                                 machine->id_hdr_size);
 215         event->comm.tid = pid;
 216
 217         return 0;
 218 }
 219
 220 pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 221                                          union perf_event *event, pid_t pid,
 222                                          perf_event__handler_t process,
 223                                          struct machine *machine)
 224 {
 225         pid_t tgid, ppid;
 226
 227         if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0)
 228                 return -1;
 229
 230         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 231                 return -1;
 232
 233         return tgid;
 234 }
 235
 236 static void perf_event__get_ns_link_info(pid_t pid, const char *ns,
 237                                          struct perf_ns_link_info *ns_link_info)
 238 {
 239         struct stat64 st;
 240         char proc_ns[128];
 241
 242         sprintf(proc_ns, "/proc/%u/ns/%s", pid, ns);
 243         if (stat64(proc_ns, &st) == 0) {
 244                 ns_link_info->dev = st.st_dev;
 245                 ns_link_info->ino = st.st_ino;
 246         }
 247 }
 248
 249 int perf_event__synthesize_namespaces(struct perf_tool *tool,
 250                                       union perf_event *event,
 251                                       pid_t pid, pid_t tgid,
 252                                       perf_event__handler_t process,
 253                                       struct machine *machine)
 254 {
 255         u32 idx;
 256         struct perf_ns_link_info *ns_link_info;
 257
 258         if (!tool || !tool->namespace_events)
 259                 return 0;
 260
 261         memset(&event->namespaces, 0, (sizeof(event->namespaces) +
 262                (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 263                machine->id_hdr_size));
 264
 265         event->namespaces.pid = tgid;
 266         event->namespaces.tid = pid;
 267
 268         event->namespaces.nr_namespaces = NR_NAMESPACES;
 269
 270         ns_link_info = event->namespaces.link_info;
 271
 272         for (idx = 0; idx < event->namespaces.nr_namespaces; idx++)
 273                 perf_event__get_ns_link_info(pid, perf_ns__name(idx),
 274                                              &ns_link_info[idx]);
 275
 276         event->namespaces.header.type = PERF_RECORD_NAMESPACES;
 277
 278         event->namespaces.header.size = (sizeof(event->namespaces) +
 279                         (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 280                         machine->id_hdr_size);
 281
 282         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 283                 return -1;
 284
 285         return 0;
 286 }
 287
 288 static int perf_event__synthesize_fork(struct perf_tool *tool,
 289                                        union perf_event *event,
 290                                        pid_t pid, pid_t tgid, pid_t ppid,
 291                                        perf_event__handler_t process,
 292                                        struct machine *machine)
 293 {
 294         memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size);
 295
 296         /*
 297          * for main thread set parent to ppid from status file. For other
 298          * threads set parent pid to main thread. ie., assume main thread
 299          * spawns all threads in a process
 300         */
 301         if (tgid == pid) {
 302                 event->fork.ppid = ppid;
 303                 event->fork.ptid = ppid;
 304         } else {
 305                 event->fork.ppid = tgid;
 306                 event->fork.ptid = tgid;
 307         }
 308         event->fork.pid  = tgid;
 309         event->fork.tid  = pid;
 310         event->fork.header.type = PERF_RECORD_FORK;
 311         event->fork.header.misc = PERF_RECORD_MISC_FORK_EXEC;
 312
 313         event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size);
 314
 315         if (perf_tool__process_synth_event(tool, event, machine, process) != 0)
 316                 return -1;
 317
 318         return 0;
 319 }
 320
 321 int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 322                                        union perf_event *event,
 323                                        pid_t pid, pid_t tgid,
 324                                        perf_event__handler_t process,
 325                                        struct machine *machine,
 326                                        bool mmap_data,
 327                                        unsigned int proc_map_timeout)
 328 {
 329         char filename[PATH_MAX];
 330         FILE *fp;
 331         unsigned long long t;
 332         bool truncation = false;
 333         unsigned long long timeout = proc_map_timeout * 1000000ULL;
 334         int rc = 0;
 335         const char *hugetlbfs_mnt = hugetlbfs__mountpoint();
 336         int hugetlbfs_mnt_len = hugetlbfs_mnt ? strlen(hugetlbfs_mnt) : 0;
 337
 338         if (machine__is_default_guest(machine))
 339                 return 0;
 340
 341         snprintf(filename, sizeof(filename), "%s/proc/%d/task/%d/maps",
 342                  machine->root_dir, pid, pid);
 343
 344         fp = fopen(filename, "r");
 345         if (fp == NULL) {
 346                 /*
 347                  * We raced with a task exiting - just return:
 348                  */
 349                 pr_debug("couldn't open %s\n", filename);
 350                 return -1;
 351         }
 352
 353         event->header.type = PERF_RECORD_MMAP2;
 354         t = rdclock();
 355
 356         while (1) {
 357                 char bf[BUFSIZ];
 358                 char prot[5];
 359                 char execname[PATH_MAX];
 360                 char anonstr[] = "//anon";
 361                 unsigned int ino;
 362                 size_t size;
 363                 ssize_t n;
 364
 365                 if (fgets(bf, sizeof(bf), fp) == NULL)
 366                         break;
 367
 368                 if ((rdclock() - t) > timeout) {
 369                         pr_warning("Reading %s time out. "
 370                                    "You may want to increase "
 371                                    "the time limit by --proc-map-timeout\n",
 372                                    filename);
 373                         truncation = true;
 374                         goto out;
 375                 }
 376
 377                 /* ensure null termination since stack will be reused. */
 378                 strcpy(execname, "");
 379
 380                 /* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
 381                 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 382                        &event->mmap2.start, &event->mmap2.len, prot,
 383                        &event->mmap2.pgoff, &event->mmap2.maj,
 384                        &event->mmap2.min,
 385                        &ino, execname);
 386
 387                 /*
 388                  * Anon maps don't have the execname.
 389                  */
 390                 if (n < 7)
 391                         continue;
 392
 393                 event->mmap2.ino = (u64)ino;
 394
 395                 /*
 396                  * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
 397                  */
 398                 if (machine__is_host(machine))
 399                         event->header.misc = PERF_RECORD_MISC_USER;
 400                 else
 401                         event->header.misc = PERF_RECORD_MISC_GUEST_USER;
 402
 403                 /* map protection and flags bits */
 404                 event->mmap2.prot = 0;
 405                 event->mmap2.flags = 0;
 406                 if (prot[0] == 'r')
 407                         event->mmap2.prot |= PROT_READ;
 408                 if (prot[1] == 'w')
 409                         event->mmap2.prot |= PROT_WRITE;
 410                 if (prot[2] == 'x')
 411                         event->mmap2.prot |= PROT_EXEC;
 412
 413                 if (prot[3] == 's')
 414                         event->mmap2.flags |= MAP_SHARED;
 415                 else
 416                         event->mmap2.flags |= MAP_PRIVATE;
 417
 418                 if (prot[2] != 'x') {
 419                         if (!mmap_data || prot[0] != 'r')
 420                                 continue;
 421
 422                         event->header.misc |= PERF_RECORD_MISC_MMAP_DATA;
 423                 }
 424
 425 out:
 426                 if (truncation)
 427                         event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT;
 428
 429                 if (!strcmp(execname, ""))
 430                         strcpy(execname, anonstr);
 431
 432                 if (hugetlbfs_mnt_len &&
 433                     !strncmp(execname, hugetlbfs_mnt, hugetlbfs_mnt_len)) {
 434                         strcpy(execname, anonstr);
 435                         event->mmap2.flags |= MAP_HUGETLB;
 436                 }
 437
 438                 size = strlen(execname) + 1;
 439                 memcpy(event->mmap2.filename, execname, size);
 440                 size = PERF_ALIGN(size, sizeof(u64));
 441                 event->mmap2.len -= event->mmap.start;
 442                 event->mmap2.header.size = (sizeof(event->mmap2) -
 443                                         (sizeof(event->mmap2.filename) - size));
 444                 memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
 445                 event->mmap2.header.size += machine->id_hdr_size;
 446                 event->mmap2.pid = tgid;
 447                 event->mmap2.tid = pid;
 448
 449                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 450                         rc = -1;
 451                         break;
 452                 }
 453
 454                 if (truncation)
 455                         break;
 456         }
 457
 458         fclose(fp);
 459         return rc;
 460 }
 461
 462 int perf_event__synthesize_modules(struct perf_tool *tool,
 463                                    perf_event__handler_t process,
 464                                    struct machine *machine)
 465 {
 466         int rc = 0;
 467         struct map *pos;
 468         struct maps *maps = machine__kernel_maps(machine);
 469         union perf_event *event = zalloc((sizeof(event->mmap) +
 470                                           machine->id_hdr_size));
 471         if (event == NULL) {
 472                 pr_debug("Not enough memory synthesizing mmap event "
 473                          "for kernel modules\n");
 474                 return -1;
 475         }
 476
 477         event->header.type = PERF_RECORD_MMAP;
 478
 479         /*
 480          * kernel uses 0 for user space maps, see kernel/perf_event.c
 481          * __perf_event_mmap
 482          */
 483         if (machine__is_host(machine))
 484                 event->header.misc = PERF_RECORD_MISC_KERNEL;
 485         else
 486                 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
 487
 488         for (pos = maps__first(maps); pos; pos = map__next(pos)) {
 489                 size_t size;
 490
 491                 if (!__map__is_kmodule(pos))
 492                         continue;
 493
 494                 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
 495                 event->mmap.header.type = PERF_RECORD_MMAP;
 496                 event->mmap.header.size = (sizeof(event->mmap) -
 497                                         (sizeof(event->mmap.filename) - size));
 498                 memset(event->mmap.filename + size, 0, machine->id_hdr_size);
 499                 event->mmap.header.size += machine->id_hdr_size;
 500                 event->mmap.start = pos->start;
 501                 event->mmap.len   = pos->end - pos->start;
 502                 event->mmap.pid   = machine->pid;
 503
 504                 memcpy(event->mmap.filename, pos->dso->long_name,
 505                        pos->dso->long_name_len + 1);
 506                 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
 507                         rc = -1;
 508                         break;
 509                 }
 510         }
 511
 512         free(event);
 513         return rc;
 514 }
 515
 516 static int __event__synthesize_thread(union perf_event *comm_event,
 517                                       union perf_event *mmap_event,
 518                                       union perf_event *fork_event,
 519                                       union perf_event *namespaces_event,
 520                                       pid_t pid, int full,
 521                                       perf_event__handler_t process,
 522                                       struct perf_tool *tool,
 523                                       struct machine *machine,
 524                                       bool mmap_data,
 525                                       unsigned int proc_map_timeout)
 526 {
 527         char filename[PATH_MAX];
 528         DIR *tasks;
 529         struct dirent *dirent;
 530         pid_t tgid, ppid;
 531         int rc = 0;
 532
 533         /* special case: only send one comm event using passed in pid */
 534         if (!full) {
 535                 tgid = perf_event__synthesize_comm(tool, comm_event, pid,
 536                                                    process, machine);
 537
 538                 if (tgid == -1)
 539                         return -1;
 540
 541                 if (perf_event__synthesize_namespaces(tool, namespaces_event, pid,
 542                                                       tgid, process, machine) < 0)
 543                         return -1;
 544
 545                 /*
 546                  * send mmap only for thread group leader
 547                  * see thread__init_map_groups
 548                  */
 549                 if (pid == tgid &&
 550                     perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 551                                                        process, machine, mmap_data,
 552                                                        proc_map_timeout))
 553                         return -1;
 554
 555                 return 0;
 556         }
 557
 558         if (machine__is_default_guest(machine))
 559                 return 0;
 560
 561         snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 562                  machine->root_dir, pid);
 563
 564         tasks = opendir(filename);
 565         if (tasks == NULL) {
 566                 pr_debug("couldn't open %s\n", filename);
 567                 return 0;
 568         }
 569
 570         while ((dirent = readdir(tasks)) != NULL) {
 571                 char *end;
 572                 pid_t _pid;
 573
 574                 _pid = strtol(dirent->d_name, &end, 10);
 575                 if (*end)
 576                         continue;
 577
 578                 rc = -1;
 579                 if (perf_event__prepare_comm(comm_event, _pid, machine,
 580                                              &tgid, &ppid) != 0)
 581                         break;
 582
 583                 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid,
 584                                                 ppid, process, machine) < 0)
 585                         break;
 586
 587                 if (perf_event__synthesize_namespaces(tool, namespaces_event, _pid,
 588                                                       tgid, process, machine) < 0)
 589                         break;
 590
 591                 /*
 592                  * Send the prepared comm event
 593                  */
 594                 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0)
 595                         break;
 596
 597                 rc = 0;
 598                 if (_pid == pid) {
 599                         /* process the parent's maps too */
 600                         rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid,
 601                                                 process, machine, mmap_data, proc_map_timeout);
 602                         if (rc)
 603                                 break;
 604                 }
 605         }
 606
 607         closedir(tasks);
 608         return rc;
 609 }
 610
 611 int perf_event__synthesize_thread_map(struct perf_tool *tool,
 612                                       struct thread_map *threads,
 613                                       perf_event__handler_t process,
 614                                       struct machine *machine,
 615                                       bool mmap_data,
 616                                       unsigned int proc_map_timeout)
 617 {
 618         union perf_event *comm_event, *mmap_event, *fork_event;
 619         union perf_event *namespaces_event;
 620         int err = -1, thread, j;
 621
 622         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 623         if (comm_event == NULL)
 624                 goto out;
 625
 626         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 627         if (mmap_event == NULL)
 628                 goto out_free_comm;
 629
 630         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 631         if (fork_event == NULL)
 632                 goto out_free_mmap;
 633
 634         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 635                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 636                                   machine->id_hdr_size);
 637         if (namespaces_event == NULL)
 638                 goto out_free_fork;
 639
 640         err = 0;
 641         for (thread = 0; thread < threads->nr; ++thread) {
 642                 if (__event__synthesize_thread(comm_event, mmap_event,
 643                                                fork_event, namespaces_event,
 644                                                thread_map__pid(threads, thread), 0,
 645                                                process, tool, machine,
 646                                                mmap_data, proc_map_timeout)) {
 647                         err = -1;
 648                         break;
 649                 }
 650
 651                 /*
 652                  * comm.pid is set to thread group id by
 653                  * perf_event__synthesize_comm
 654                  */
 655                 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) {
 656                         bool need_leader = true;
 657
 658                         /* is thread group leader in thread_map? */
 659                         for (j = 0; j < threads->nr; ++j) {
 660                                 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) {
 661                                         need_leader = false;
 662                                         break;
 663                                 }
 664                         }
 665
 666                         /* if not, generate events for it */
 667                         if (need_leader &&
 668                             __event__synthesize_thread(comm_event, mmap_event,
 669                                                        fork_event, namespaces_event,
 670                                                        comm_event->comm.pid, 0,
 671                                                        process, tool, machine,
 672                                                        mmap_data, proc_map_timeout)) {
 673                                 err = -1;
 674                                 break;
 675                         }
 676                 }
 677         }
 678         free(namespaces_event);
 679 out_free_fork:
 680         free(fork_event);
 681 out_free_mmap:
 682         free(mmap_event);
 683 out_free_comm:
 684         free(comm_event);
 685 out:
 686         return err;
 687 }
 688
 689 static int __perf_event__synthesize_threads(struct perf_tool *tool,
 690                                             perf_event__handler_t process,
 691                                             struct machine *machine,
 692                                             bool mmap_data,
 693                                             unsigned int proc_map_timeout,
 694                                             struct dirent **dirent,
 695                                             int start,
 696                                             int num)
 697 {
 698         union perf_event *comm_event, *mmap_event, *fork_event;
 699         union perf_event *namespaces_event;
 700         int err = -1;
 701         char *end;
 702         pid_t pid;
 703         int i;
 704
 705         comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size);
 706         if (comm_event == NULL)
 707                 goto out;
 708
 709         mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
 710         if (mmap_event == NULL)
 711                 goto out_free_comm;
 712
 713         fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size);
 714         if (fork_event == NULL)
 715                 goto out_free_mmap;
 716
 717         namespaces_event = malloc(sizeof(namespaces_event->namespaces) +
 718                                   (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
 719                                   machine->id_hdr_size);
 720         if (namespaces_event == NULL)
 721                 goto out_free_fork;
 722
 723         for (i = start; i < start + num; i++) {
 724                 if (!isdigit(dirent[i]->d_name[0]))
 725                         continue;
 726
 727                 pid = (pid_t)strtol(dirent[i]->d_name, &end, 10);
 728                 /* only interested in proper numerical dirents */
 729                 if (*end)
 730                         continue;
 731                 /*
 732                  * We may race with exiting thread, so don't stop just because
 733                  * one thread couldn't be synthesized.
 734                  */
 735                 __event__synthesize_thread(comm_event, mmap_event, fork_event,
 736                                            namespaces_event, pid, 1, process,
 737                                            tool, machine, mmap_data,
 738                                            proc_map_timeout);
 739         }
 740         err = 0;
 741
 742         free(namespaces_event);
 743 out_free_fork:
 744         free(fork_event);
 745 out_free_mmap:
 746         free(mmap_event);
 747 out_free_comm:
 748         free(comm_event);
 749 out:
 750         return err;
 751 }
 752
 753 struct synthesize_threads_arg {
 754         struct perf_tool *tool;
 755         perf_event__handler_t process;
 756         struct machine *machine;
 757         bool mmap_data;
 758         unsigned int proc_map_timeout;
 759         struct dirent **dirent;
 760         int num;
 761         int start;
 762 };
 763
 764 static void *synthesize_threads_worker(void *arg)
 765 {
 766         struct synthesize_threads_arg *args = arg;
 767
 768         __perf_event__synthesize_threads(args->tool, args->process,
 769                                          args->machine, args->mmap_data,
 770                                          args->proc_map_timeout, args->dirent,
 771                                          args->start, args->num);
 772         return NULL;
 773 }
 774
 775 int perf_event__synthesize_threads(struct perf_tool *tool,
 776                                    perf_event__handler_t process,
 777                                    struct machine *machine,
 778                                    bool mmap_data,
 779                                    unsigned int proc_map_timeout,
 780                                    unsigned int nr_threads_synthesize)
 781 {
 782         struct synthesize_threads_arg *args = NULL;
 783         pthread_t *synthesize_threads = NULL;
 784         char proc_path[PATH_MAX];
 785         struct dirent **dirent;
 786         int num_per_thread;
 787         int m, n, i, j;
 788         int thread_nr;
 789         int base = 0;
 790         int err = -1;
 791
 792
 793         if (machine__is_default_guest(machine))
 794                 return 0;
 795
 796         snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 797         n = scandir(proc_path, &dirent, 0, alphasort);
 798         if (n < 0)
 799                 return err;
 800
 801         if (nr_threads_synthesize == UINT_MAX)
 802                 thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
 803         else
 804                 thread_nr = nr_threads_synthesize;
 805
 806         if (thread_nr <= 1) {
 807                 err = __perf_event__synthesize_threads(tool, process,
 808                                                        machine, mmap_data,
 809                                                        proc_map_timeout,
 810                                                        dirent, base, n);
 811                 goto free_dirent;
 812         }
 813         if (thread_nr > n)
 814                 thread_nr = n;
 815
 816         synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
 817         if (synthesize_threads == NULL)
 818                 goto free_dirent;
 819
 820         args = calloc(sizeof(*args), thread_nr);
 821         if (args == NULL)
 822                 goto free_threads;
 823
 824         num_per_thread = n / thread_nr;
 825         m = n % thread_nr;
 826         for (i = 0; i < thread_nr; i++) {
 827                 args[i].tool = tool;
 828                 args[i].process = process;
 829                 args[i].machine = machine;
 830                 args[i].mmap_data = mmap_data;
 831                 args[i].proc_map_timeout = proc_map_timeout;
 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                 free(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 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
1339 {
1340         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
1341                        event->mmap.pid, event->mmap.tid, event->mmap.start,
1342                        event->mmap.len, event->mmap.pgoff,
1343                        (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
1344                        event->mmap.filename);
1345 }
1346
1347 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
1348 {
1349         return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
1350                            " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
1351                        event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
1352                        event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
1353                        event->mmap2.min, event->mmap2.ino,
1354                        event->mmap2.ino_generation,
1355                        (event->mmap2.prot & PROT_READ) ? 'r' : '-',
1356                        (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
1357                        (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
1358                        (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
1359                        event->mmap2.filename);
1360 }
1361
1362 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
1363 {
1364         struct thread_map *threads = thread_map__new_event(&event->thread_map);
1365         size_t ret;
1366
1367         ret = fprintf(fp, " nr: ");
1368
1369         if (threads)
1370                 ret += thread_map__fprintf(threads, fp);
1371         else
1372                 ret += fprintf(fp, "failed to get threads from event\n");
1373
1374         thread_map__put(threads);
1375         return ret;
1376 }
1377
1378 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
1379 {
1380         struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
1381         size_t ret;
1382
1383         ret = fprintf(fp, ": ");
1384
1385         if (cpus)
1386                 ret += cpu_map__fprintf(cpus, fp);
1387         else
1388                 ret += fprintf(fp, "failed to get cpumap from event\n");
1389
1390         cpu_map__put(cpus);
1391         return ret;
1392 }
1393
1394 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
1395                              union perf_event *event,
1396                              struct perf_sample *sample,
1397                              struct machine *machine)
1398 {
1399         return machine__process_mmap_event(machine, event, sample);
1400 }
1401
1402 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
1403                              union perf_event *event,
1404                              struct perf_sample *sample,
1405                              struct machine *machine)
1406 {
1407         return machine__process_mmap2_event(machine, event, sample);
1408 }
1409
1410 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
1411 {
1412         return fprintf(fp, "(%d:%d):(%d:%d)\n",
1413                        event->fork.pid, event->fork.tid,
1414                        event->fork.ppid, event->fork.ptid);
1415 }
1416
1417 int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
1418                              union perf_event *event,
1419                              struct perf_sample *sample,
1420                              struct machine *machine)
1421 {
1422         return machine__process_fork_event(machine, event, sample);
1423 }
1424
1425 int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
1426                              union perf_event *event,
1427                              struct perf_sample *sample,
1428                              struct machine *machine)
1429 {
1430         return machine__process_exit_event(machine, event, sample);
1431 }
1432
1433 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
1434 {
1435         return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s%s]\n",
1436                        event->aux.aux_offset, event->aux.aux_size,
1437                        event->aux.flags,
1438                        event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
1439                        event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
1440                        event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
1441 }
1442
1443 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
1444 {
1445         return fprintf(fp, " pid: %u tid: %u\n",
1446                        event->itrace_start.pid, event->itrace_start.tid);
1447 }
1448
1449 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
1450 {
1451         bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
1452         const char *in_out = !out ? "IN         " :
1453                 !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
1454                                     "OUT        " : "OUT preempt";
1455
1456         if (event->header.type == PERF_RECORD_SWITCH)
1457                 return fprintf(fp, " %s\n", in_out);
1458
1459         return fprintf(fp, " %s  %s pid/tid: %5u/%-5u\n",
1460                        in_out, out ? "next" : "prev",
1461                        event->context_switch.next_prev_pid,
1462                        event->context_switch.next_prev_tid);
1463 }
1464
1465 static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
1466 {
1467         return fprintf(fp, " lost %" PRIu64 "\n", event->lost.lost);
1468 }
1469
1470 size_t perf_event__fprintf(union perf_event *event, FILE *fp)
1471 {
1472         size_t ret = fprintf(fp, "PERF_RECORD_%s",
1473                              perf_event__name(event->header.type));
1474
1475         switch (event->header.type) {
1476         case PERF_RECORD_COMM:
1477                 ret += perf_event__fprintf_comm(event, fp);
1478                 break;
1479         case PERF_RECORD_FORK:
1480         case PERF_RECORD_EXIT:
1481                 ret += perf_event__fprintf_task(event, fp);
1482                 break;
1483         case PERF_RECORD_MMAP:
1484                 ret += perf_event__fprintf_mmap(event, fp);
1485                 break;
1486         case PERF_RECORD_NAMESPACES:
1487                 ret += perf_event__fprintf_namespaces(event, fp);
1488                 break;
1489         case PERF_RECORD_MMAP2:
1490                 ret += perf_event__fprintf_mmap2(event, fp);
1491                 break;
1492         case PERF_RECORD_AUX:
1493                 ret += perf_event__fprintf_aux(event, fp);
1494                 break;
1495         case PERF_RECORD_ITRACE_START:
1496                 ret += perf_event__fprintf_itrace_start(event, fp);
1497                 break;
1498         case PERF_RECORD_SWITCH:
1499         case PERF_RECORD_SWITCH_CPU_WIDE:
1500                 ret += perf_event__fprintf_switch(event, fp);
1501                 break;
1502         case PERF_RECORD_LOST:
1503                 ret += perf_event__fprintf_lost(event, fp);
1504                 break;
1505         default:
1506                 ret += fprintf(fp, "\n");
1507         }
1508
1509         return ret;
1510 }
1511
1512 int perf_event__process(struct perf_tool *tool __maybe_unused,
1513                         union perf_event *event,
1514                         struct perf_sample *sample,
1515                         struct machine *machine)
1516 {
1517         return machine__process_event(machine, event, sample);
1518 }
1519
1520 struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
1521                              struct addr_location *al)
1522 {
1523         struct map_groups *mg = thread->mg;
1524         struct machine *machine = mg->machine;
1525         bool load_map = false;
1526
1527         al->machine = machine;
1528         al->thread = thread;
1529         al->addr = addr;
1530         al->cpumode = cpumode;
1531         al->filtered = 0;
1532
1533         if (machine == NULL) {
1534                 al->map = NULL;
1535                 return NULL;
1536         }
1537
1538         if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
1539                 al->level = 'k';
1540                 mg = &machine->kmaps;
1541                 load_map = true;
1542         } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
1543                 al->level = '.';
1544         } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
1545                 al->level = 'g';
1546                 mg = &machine->kmaps;
1547                 load_map = true;
1548         } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
1549                 al->level = 'u';
1550         } else {
1551                 al->level = 'H';
1552                 al->map = NULL;
1553
1554                 if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
1555                         cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
1556                         !perf_guest)
1557                         al->filtered |= (1 << HIST_FILTER__GUEST);
1558                 if ((cpumode == PERF_RECORD_MISC_USER ||
1559                         cpumode == PERF_RECORD_MISC_KERNEL) &&
1560                         !perf_host)
1561                         al->filtered |= (1 << HIST_FILTER__HOST);
1562
1563                 return NULL;
1564         }
1565
1566         al->map = map_groups__find(mg, al->addr);
1567         if (al->map != NULL) {
1568                 /*
1569                  * Kernel maps might be changed when loading symbols so loading
1570                  * must be done prior to using kernel maps.
1571                  */
1572                 if (load_map)
1573                         map__load(al->map);
1574                 al->addr = al->map->map_ip(al->map, al->addr);
1575         }
1576
1577         return al->map;
1578 }
1579
1580 /*
1581  * For branch stacks or branch samples, the sample cpumode might not be correct
1582  * because it applies only to the sample 'ip' and not necessary to 'addr' or
1583  * branch stack addresses. If possible, use a fallback to deal with those cases.
1584  */
1585 struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
1586                                 struct addr_location *al)
1587 {
1588         struct map *map = thread__find_map(thread, cpumode, addr, al);
1589         struct machine *machine = thread->mg->machine;
1590         u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);
1591
1592         if (map || addr_cpumode == cpumode)
1593                 return map;
1594
1595         return thread__find_map(thread, addr_cpumode, addr, al);
1596 }
1597
1598 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
1599                                    u64 addr, struct addr_location *al)
1600 {
1601         al->sym = NULL;
1602         if (thread__find_map(thread, cpumode, addr, al))
1603                 al->sym = map__find_symbol(al->map, al->addr);
1604         return al->sym;
1605 }
1606
1607 struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
1608                                       u64 addr, struct addr_location *al)
1609 {
1610         al->sym = NULL;
1611         if (thread__find_map_fb(thread, cpumode, addr, al))
1612                 al->sym = map__find_symbol(al->map, al->addr);
1613         return al->sym;
1614 }
1615
1616 /*
1617  * Callers need to drop the reference to al->thread, obtained in
1618  * machine__findnew_thread()
1619  */
1620 int machine__resolve(struct machine *machine, struct addr_location *al,
1621                      struct perf_sample *sample)
1622 {
1623         struct thread *thread = machine__findnew_thread(machine, sample->pid,
1624                                                         sample->tid);
1625
1626         if (thread == NULL)
1627                 return -1;
1628
1629         dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
1630         thread__find_map(thread, sample->cpumode, sample->ip, al);
1631         dump_printf(" ...... dso: %s\n",
1632                     al->map ? al->map->dso->long_name :
1633                         al->level == 'H' ? "[hypervisor]" : "<not found>");
1634
1635         if (thread__is_filtered(thread))
1636                 al->filtered |= (1 << HIST_FILTER__THREAD);
1637
1638         al->sym = NULL;
1639         al->cpu = sample->cpu;
1640         al->socket = -1;
1641         al->srcline = NULL;
1642
1643         if (al->cpu >= 0) {
1644                 struct perf_env *env = machine->env;
1645
1646                 if (env && env->cpu)
1647                         al->socket = env->cpu[al->cpu].socket_id;
1648         }
1649
1650         if (al->map) {
1651                 struct dso *dso = al->map->dso;
1652
1653                 if (symbol_conf.dso_list &&
1654                     (!dso || !(strlist__has_entry(symbol_conf.dso_list,
1655                                                   dso->short_name) ||
1656                                (dso->short_name != dso->long_name &&
1657                                 strlist__has_entry(symbol_conf.dso_list,
1658                                                    dso->long_name))))) {
1659                         al->filtered |= (1 << HIST_FILTER__DSO);
1660                 }
1661
1662                 al->sym = map__find_symbol(al->map, al->addr);
1663         }
1664
1665         if (symbol_conf.sym_list &&
1666                 (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
1667                                                 al->sym->name))) {
1668                 al->filtered |= (1 << HIST_FILTER__SYMBOL);
1669         }
1670
1671         return 0;
1672 }
1673
1674 /*
1675  * The preprocess_sample method will return with reference counts for the
1676  * in it, when done using (and perhaps getting ref counts if needing to
1677  * keep a pointer to one of those entries) it must be paired with
1678  * addr_location__put(), so that the refcounts can be decremented.
1679  */
1680 void addr_location__put(struct addr_location *al)
1681 {
1682         thread__zput(al->thread);
1683 }
1684
1685 bool is_bts_event(struct perf_event_attr *attr)
1686 {
1687         return attr->type == PERF_TYPE_HARDWARE &&
1688                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
1689                attr->sample_period == 1;
1690 }
1691
1692 bool sample_addr_correlates_sym(struct perf_event_attr *attr)
1693 {
1694         if (attr->type == PERF_TYPE_SOFTWARE &&
1695             (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
1696              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
1697              attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
1698                 return true;
1699
1700         if (is_bts_event(attr))
1701                 return true;
1702
1703         return false;
1704 }
1705
1706 void thread__resolve(struct thread *thread, struct addr_location *al,
1707                      struct perf_sample *sample)
1708 {
1709         thread__find_map(thread, sample->cpumode, sample->addr, al);
1710
1711         al->cpu = sample->cpu;
1712         al->sym = NULL;
1713
1714         if (al->map)
1715                 al->sym = map__find_symbol(al->map, al->addr);
1716 }