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 struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode, 1581 u64 addr, struct addr_location *al) 1582 { 1583 al->sym = NULL; 1584 if (thread__find_map(thread, cpumode, addr, al)) 1585 al->sym = map__find_symbol(al->map, al->addr); 1586 return al->sym; 1587 } 1588 1589 /* 1590 * Callers need to drop the reference to al->thread, obtained in 1591 * machine__findnew_thread() 1592 */ 1593 int machine__resolve(struct machine *machine, struct addr_location *al, 1594 struct perf_sample *sample) 1595 { 1596 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1597 sample->tid); 1598 1599 if (thread == NULL) 1600 return -1; 1601 1602 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1603 thread__find_map(thread, sample->cpumode, sample->ip, al); 1604 dump_printf(" ...... dso: %s\n", 1605 al->map ? al->map->dso->long_name : 1606 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1607 1608 if (thread__is_filtered(thread)) 1609 al->filtered |= (1 << HIST_FILTER__THREAD); 1610 1611 al->sym = NULL; 1612 al->cpu = sample->cpu; 1613 al->socket = -1; 1614 al->srcline = NULL; 1615 1616 if (al->cpu >= 0) { 1617 struct perf_env *env = machine->env; 1618 1619 if (env && env->cpu) 1620 al->socket = env->cpu[al->cpu].socket_id; 1621 } 1622 1623 if (al->map) { 1624 struct dso *dso = al->map->dso; 1625 1626 if (symbol_conf.dso_list && 1627 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1628 dso->short_name) || 1629 (dso->short_name != dso->long_name && 1630 strlist__has_entry(symbol_conf.dso_list, 1631 dso->long_name))))) { 1632 al->filtered |= (1 << HIST_FILTER__DSO); 1633 } 1634 1635 al->sym = map__find_symbol(al->map, al->addr); 1636 } 1637 1638 if (symbol_conf.sym_list && 1639 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1640 al->sym->name))) { 1641 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1642 } 1643 1644 return 0; 1645 } 1646 1647 /* 1648 * The preprocess_sample method will return with reference counts for the 1649 * in it, when done using (and perhaps getting ref counts if needing to 1650 * keep a pointer to one of those entries) it must be paired with 1651 * addr_location__put(), so that the refcounts can be decremented. 1652 */ 1653 void addr_location__put(struct addr_location *al) 1654 { 1655 thread__zput(al->thread); 1656 } 1657 1658 bool is_bts_event(struct perf_event_attr *attr) 1659 { 1660 return attr->type == PERF_TYPE_HARDWARE && 1661 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1662 attr->sample_period == 1; 1663 } 1664 1665 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1666 { 1667 if (attr->type == PERF_TYPE_SOFTWARE && 1668 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1669 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1670 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1671 return true; 1672 1673 if (is_bts_event(attr)) 1674 return true; 1675 1676 return false; 1677 } 1678 1679 void thread__resolve(struct thread *thread, struct addr_location *al, 1680 struct perf_sample *sample) 1681 { 1682 thread__find_map(thread, sample->cpumode, sample->addr, al); 1683 1684 al->cpu = sample->cpu; 1685 al->sym = NULL; 1686 1687 if (al->map) 1688 al->sym = map__find_symbol(al->map, al->addr); 1689 } 1690