1 #include <linux/types.h> 2 #include <sys/mman.h> 3 #include "event.h" 4 #include "debug.h" 5 #include "hist.h" 6 #include "machine.h" 7 #include "sort.h" 8 #include "string.h" 9 #include "strlist.h" 10 #include "thread.h" 11 #include "thread_map.h" 12 #include "symbol/kallsyms.h" 13 14 static const char *perf_event__names[] = { 15 [0] = "TOTAL", 16 [PERF_RECORD_MMAP] = "MMAP", 17 [PERF_RECORD_MMAP2] = "MMAP2", 18 [PERF_RECORD_LOST] = "LOST", 19 [PERF_RECORD_COMM] = "COMM", 20 [PERF_RECORD_EXIT] = "EXIT", 21 [PERF_RECORD_THROTTLE] = "THROTTLE", 22 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 23 [PERF_RECORD_FORK] = "FORK", 24 [PERF_RECORD_READ] = "READ", 25 [PERF_RECORD_SAMPLE] = "SAMPLE", 26 [PERF_RECORD_AUX] = "AUX", 27 [PERF_RECORD_ITRACE_START] = "ITRACE_START", 28 [PERF_RECORD_HEADER_ATTR] = "ATTR", 29 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 30 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 31 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 32 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 33 [PERF_RECORD_ID_INDEX] = "ID_INDEX", 34 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO", 35 [PERF_RECORD_AUXTRACE] = "AUXTRACE", 36 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR", 37 }; 38 39 const char *perf_event__name(unsigned int id) 40 { 41 if (id >= ARRAY_SIZE(perf_event__names)) 42 return "INVALID"; 43 if (!perf_event__names[id]) 44 return "UNKNOWN"; 45 return perf_event__names[id]; 46 } 47 48 static struct perf_sample synth_sample = { 49 .pid = -1, 50 .tid = -1, 51 .time = -1, 52 .stream_id = -1, 53 .cpu = -1, 54 .period = 1, 55 }; 56 57 /* 58 * Assumes that the first 4095 bytes of /proc/pid/stat contains 59 * the comm, tgid and ppid. 60 */ 61 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 62 pid_t *tgid, pid_t *ppid) 63 { 64 char filename[PATH_MAX]; 65 char bf[4096]; 66 int fd; 67 size_t size = 0, n; 68 char *nl, *name, *tgids, *ppids; 69 70 *tgid = -1; 71 *ppid = -1; 72 73 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 74 75 fd = open(filename, O_RDONLY); 76 if (fd < 0) { 77 pr_debug("couldn't open %s\n", filename); 78 return -1; 79 } 80 81 n = read(fd, bf, sizeof(bf) - 1); 82 close(fd); 83 if (n <= 0) { 84 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 85 pid); 86 return -1; 87 } 88 bf[n] = '\0'; 89 90 name = strstr(bf, "Name:"); 91 tgids = strstr(bf, "Tgid:"); 92 ppids = strstr(bf, "PPid:"); 93 94 if (name) { 95 name += 5; /* strlen("Name:") */ 96 97 while (*name && isspace(*name)) 98 ++name; 99 100 nl = strchr(name, '\n'); 101 if (nl) 102 *nl = '\0'; 103 104 size = strlen(name); 105 if (size >= len) 106 size = len - 1; 107 memcpy(comm, name, size); 108 comm[size] = '\0'; 109 } else { 110 pr_debug("Name: string not found for pid %d\n", pid); 111 } 112 113 if (tgids) { 114 tgids += 5; /* strlen("Tgid:") */ 115 *tgid = atoi(tgids); 116 } else { 117 pr_debug("Tgid: string not found for pid %d\n", pid); 118 } 119 120 if (ppids) { 121 ppids += 5; /* strlen("PPid:") */ 122 *ppid = atoi(ppids); 123 } else { 124 pr_debug("PPid: string not found for pid %d\n", pid); 125 } 126 127 return 0; 128 } 129 130 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 131 struct machine *machine, 132 pid_t *tgid, pid_t *ppid) 133 { 134 size_t size; 135 136 *ppid = -1; 137 138 memset(&event->comm, 0, sizeof(event->comm)); 139 140 if (machine__is_host(machine)) { 141 if (perf_event__get_comm_ids(pid, event->comm.comm, 142 sizeof(event->comm.comm), 143 tgid, ppid) != 0) { 144 return -1; 145 } 146 } else { 147 *tgid = machine->pid; 148 } 149 150 if (*tgid < 0) 151 return -1; 152 153 event->comm.pid = *tgid; 154 event->comm.header.type = PERF_RECORD_COMM; 155 156 size = strlen(event->comm.comm) + 1; 157 size = PERF_ALIGN(size, sizeof(u64)); 158 memset(event->comm.comm + size, 0, machine->id_hdr_size); 159 event->comm.header.size = (sizeof(event->comm) - 160 (sizeof(event->comm.comm) - size) + 161 machine->id_hdr_size); 162 event->comm.tid = pid; 163 164 return 0; 165 } 166 167 static pid_t perf_event__synthesize_comm(struct perf_tool *tool, 168 union perf_event *event, pid_t pid, 169 perf_event__handler_t process, 170 struct machine *machine) 171 { 172 pid_t tgid, ppid; 173 174 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 175 return -1; 176 177 if (process(tool, event, &synth_sample, machine) != 0) 178 return -1; 179 180 return tgid; 181 } 182 183 static int perf_event__synthesize_fork(struct perf_tool *tool, 184 union perf_event *event, 185 pid_t pid, pid_t tgid, pid_t ppid, 186 perf_event__handler_t process, 187 struct machine *machine) 188 { 189 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 190 191 /* 192 * for main thread set parent to ppid from status file. For other 193 * threads set parent pid to main thread. ie., assume main thread 194 * spawns all threads in a process 195 */ 196 if (tgid == pid) { 197 event->fork.ppid = ppid; 198 event->fork.ptid = ppid; 199 } else { 200 event->fork.ppid = tgid; 201 event->fork.ptid = tgid; 202 } 203 event->fork.pid = tgid; 204 event->fork.tid = pid; 205 event->fork.header.type = PERF_RECORD_FORK; 206 207 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 208 209 if (process(tool, event, &synth_sample, machine) != 0) 210 return -1; 211 212 return 0; 213 } 214 215 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 216 union perf_event *event, 217 pid_t pid, pid_t tgid, 218 perf_event__handler_t process, 219 struct machine *machine, 220 bool mmap_data) 221 { 222 char filename[PATH_MAX]; 223 FILE *fp; 224 int rc = 0; 225 226 if (machine__is_default_guest(machine)) 227 return 0; 228 229 snprintf(filename, sizeof(filename), "%s/proc/%d/maps", 230 machine->root_dir, pid); 231 232 fp = fopen(filename, "r"); 233 if (fp == NULL) { 234 /* 235 * We raced with a task exiting - just return: 236 */ 237 pr_debug("couldn't open %s\n", filename); 238 return -1; 239 } 240 241 event->header.type = PERF_RECORD_MMAP2; 242 243 while (1) { 244 char bf[BUFSIZ]; 245 char prot[5]; 246 char execname[PATH_MAX]; 247 char anonstr[] = "//anon"; 248 unsigned int ino; 249 size_t size; 250 ssize_t n; 251 252 if (fgets(bf, sizeof(bf), fp) == NULL) 253 break; 254 255 /* ensure null termination since stack will be reused. */ 256 strcpy(execname, ""); 257 258 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 259 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n", 260 &event->mmap2.start, &event->mmap2.len, prot, 261 &event->mmap2.pgoff, &event->mmap2.maj, 262 &event->mmap2.min, 263 &ino, execname); 264 265 /* 266 * Anon maps don't have the execname. 267 */ 268 if (n < 7) 269 continue; 270 271 event->mmap2.ino = (u64)ino; 272 273 /* 274 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 275 */ 276 if (machine__is_host(machine)) 277 event->header.misc = PERF_RECORD_MISC_USER; 278 else 279 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 280 281 /* map protection and flags bits */ 282 event->mmap2.prot = 0; 283 event->mmap2.flags = 0; 284 if (prot[0] == 'r') 285 event->mmap2.prot |= PROT_READ; 286 if (prot[1] == 'w') 287 event->mmap2.prot |= PROT_WRITE; 288 if (prot[2] == 'x') 289 event->mmap2.prot |= PROT_EXEC; 290 291 if (prot[3] == 's') 292 event->mmap2.flags |= MAP_SHARED; 293 else 294 event->mmap2.flags |= MAP_PRIVATE; 295 296 if (prot[2] != 'x') { 297 if (!mmap_data || prot[0] != 'r') 298 continue; 299 300 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 301 } 302 303 if (!strcmp(execname, "")) 304 strcpy(execname, anonstr); 305 306 size = strlen(execname) + 1; 307 memcpy(event->mmap2.filename, execname, size); 308 size = PERF_ALIGN(size, sizeof(u64)); 309 event->mmap2.len -= event->mmap.start; 310 event->mmap2.header.size = (sizeof(event->mmap2) - 311 (sizeof(event->mmap2.filename) - size)); 312 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 313 event->mmap2.header.size += machine->id_hdr_size; 314 event->mmap2.pid = tgid; 315 event->mmap2.tid = pid; 316 317 if (process(tool, event, &synth_sample, machine) != 0) { 318 rc = -1; 319 break; 320 } 321 } 322 323 fclose(fp); 324 return rc; 325 } 326 327 int perf_event__synthesize_modules(struct perf_tool *tool, 328 perf_event__handler_t process, 329 struct machine *machine) 330 { 331 int rc = 0; 332 struct map *pos; 333 struct map_groups *kmaps = &machine->kmaps; 334 struct maps *maps = &kmaps->maps[MAP__FUNCTION]; 335 union perf_event *event = zalloc((sizeof(event->mmap) + 336 machine->id_hdr_size)); 337 if (event == NULL) { 338 pr_debug("Not enough memory synthesizing mmap event " 339 "for kernel modules\n"); 340 return -1; 341 } 342 343 event->header.type = PERF_RECORD_MMAP; 344 345 /* 346 * kernel uses 0 for user space maps, see kernel/perf_event.c 347 * __perf_event_mmap 348 */ 349 if (machine__is_host(machine)) 350 event->header.misc = PERF_RECORD_MISC_KERNEL; 351 else 352 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 353 354 for (pos = maps__first(maps); pos; pos = map__next(pos)) { 355 size_t size; 356 357 if (pos->dso->kernel) 358 continue; 359 360 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 361 event->mmap.header.type = PERF_RECORD_MMAP; 362 event->mmap.header.size = (sizeof(event->mmap) - 363 (sizeof(event->mmap.filename) - size)); 364 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 365 event->mmap.header.size += machine->id_hdr_size; 366 event->mmap.start = pos->start; 367 event->mmap.len = pos->end - pos->start; 368 event->mmap.pid = machine->pid; 369 370 memcpy(event->mmap.filename, pos->dso->long_name, 371 pos->dso->long_name_len + 1); 372 if (process(tool, event, &synth_sample, machine) != 0) { 373 rc = -1; 374 break; 375 } 376 } 377 378 free(event); 379 return rc; 380 } 381 382 static int __event__synthesize_thread(union perf_event *comm_event, 383 union perf_event *mmap_event, 384 union perf_event *fork_event, 385 pid_t pid, int full, 386 perf_event__handler_t process, 387 struct perf_tool *tool, 388 struct machine *machine, bool mmap_data) 389 { 390 char filename[PATH_MAX]; 391 DIR *tasks; 392 struct dirent dirent, *next; 393 pid_t tgid, ppid; 394 int rc = 0; 395 396 /* special case: only send one comm event using passed in pid */ 397 if (!full) { 398 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 399 process, machine); 400 401 if (tgid == -1) 402 return -1; 403 404 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 405 process, machine, mmap_data); 406 } 407 408 if (machine__is_default_guest(machine)) 409 return 0; 410 411 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 412 machine->root_dir, pid); 413 414 tasks = opendir(filename); 415 if (tasks == NULL) { 416 pr_debug("couldn't open %s\n", filename); 417 return 0; 418 } 419 420 while (!readdir_r(tasks, &dirent, &next) && next) { 421 char *end; 422 pid_t _pid; 423 424 _pid = strtol(dirent.d_name, &end, 10); 425 if (*end) 426 continue; 427 428 rc = -1; 429 if (perf_event__prepare_comm(comm_event, _pid, machine, 430 &tgid, &ppid) != 0) 431 break; 432 433 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 434 ppid, process, machine) < 0) 435 break; 436 /* 437 * Send the prepared comm event 438 */ 439 if (process(tool, comm_event, &synth_sample, machine) != 0) 440 break; 441 442 rc = 0; 443 if (_pid == pid) { 444 /* process the parent's maps too */ 445 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 446 process, machine, mmap_data); 447 if (rc) 448 break; 449 } 450 } 451 452 closedir(tasks); 453 return rc; 454 } 455 456 int perf_event__synthesize_thread_map(struct perf_tool *tool, 457 struct thread_map *threads, 458 perf_event__handler_t process, 459 struct machine *machine, 460 bool mmap_data) 461 { 462 union perf_event *comm_event, *mmap_event, *fork_event; 463 int err = -1, thread, j; 464 465 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 466 if (comm_event == NULL) 467 goto out; 468 469 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); 470 if (mmap_event == NULL) 471 goto out_free_comm; 472 473 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 474 if (fork_event == NULL) 475 goto out_free_mmap; 476 477 err = 0; 478 for (thread = 0; thread < threads->nr; ++thread) { 479 if (__event__synthesize_thread(comm_event, mmap_event, 480 fork_event, 481 threads->map[thread], 0, 482 process, tool, machine, 483 mmap_data)) { 484 err = -1; 485 break; 486 } 487 488 /* 489 * comm.pid is set to thread group id by 490 * perf_event__synthesize_comm 491 */ 492 if ((int) comm_event->comm.pid != threads->map[thread]) { 493 bool need_leader = true; 494 495 /* is thread group leader in thread_map? */ 496 for (j = 0; j < threads->nr; ++j) { 497 if ((int) comm_event->comm.pid == threads->map[j]) { 498 need_leader = false; 499 break; 500 } 501 } 502 503 /* if not, generate events for it */ 504 if (need_leader && 505 __event__synthesize_thread(comm_event, mmap_event, 506 fork_event, 507 comm_event->comm.pid, 0, 508 process, tool, machine, 509 mmap_data)) { 510 err = -1; 511 break; 512 } 513 } 514 } 515 free(fork_event); 516 out_free_mmap: 517 free(mmap_event); 518 out_free_comm: 519 free(comm_event); 520 out: 521 return err; 522 } 523 524 int perf_event__synthesize_threads(struct perf_tool *tool, 525 perf_event__handler_t process, 526 struct machine *machine, bool mmap_data) 527 { 528 DIR *proc; 529 char proc_path[PATH_MAX]; 530 struct dirent dirent, *next; 531 union perf_event *comm_event, *mmap_event, *fork_event; 532 int err = -1; 533 534 if (machine__is_default_guest(machine)) 535 return 0; 536 537 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 538 if (comm_event == NULL) 539 goto out; 540 541 mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); 542 if (mmap_event == NULL) 543 goto out_free_comm; 544 545 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 546 if (fork_event == NULL) 547 goto out_free_mmap; 548 549 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 550 proc = opendir(proc_path); 551 552 if (proc == NULL) 553 goto out_free_fork; 554 555 while (!readdir_r(proc, &dirent, &next) && next) { 556 char *end; 557 pid_t pid = strtol(dirent.d_name, &end, 10); 558 559 if (*end) /* only interested in proper numerical dirents */ 560 continue; 561 /* 562 * We may race with exiting thread, so don't stop just because 563 * one thread couldn't be synthesized. 564 */ 565 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid, 566 1, process, tool, machine, mmap_data); 567 } 568 569 err = 0; 570 closedir(proc); 571 out_free_fork: 572 free(fork_event); 573 out_free_mmap: 574 free(mmap_event); 575 out_free_comm: 576 free(comm_event); 577 out: 578 return err; 579 } 580 581 struct process_symbol_args { 582 const char *name; 583 u64 start; 584 }; 585 586 static int find_symbol_cb(void *arg, const char *name, char type, 587 u64 start) 588 { 589 struct process_symbol_args *args = arg; 590 591 /* 592 * Must be a function or at least an alias, as in PARISC64, where "_text" is 593 * an 'A' to the same address as "_stext". 594 */ 595 if (!(symbol_type__is_a(type, MAP__FUNCTION) || 596 type == 'A') || strcmp(name, args->name)) 597 return 0; 598 599 args->start = start; 600 return 1; 601 } 602 603 u64 kallsyms__get_function_start(const char *kallsyms_filename, 604 const char *symbol_name) 605 { 606 struct process_symbol_args args = { .name = symbol_name, }; 607 608 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 609 return 0; 610 611 return args.start; 612 } 613 614 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 615 perf_event__handler_t process, 616 struct machine *machine) 617 { 618 size_t size; 619 const char *mmap_name; 620 char name_buff[PATH_MAX]; 621 struct map *map; 622 struct kmap *kmap; 623 int err; 624 union perf_event *event; 625 626 if (machine->vmlinux_maps[0] == NULL) 627 return -1; 628 629 /* 630 * We should get this from /sys/kernel/sections/.text, but till that is 631 * available use this, and after it is use this as a fallback for older 632 * kernels. 633 */ 634 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 635 if (event == NULL) { 636 pr_debug("Not enough memory synthesizing mmap event " 637 "for kernel modules\n"); 638 return -1; 639 } 640 641 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); 642 if (machine__is_host(machine)) { 643 /* 644 * kernel uses PERF_RECORD_MISC_USER for user space maps, 645 * see kernel/perf_event.c __perf_event_mmap 646 */ 647 event->header.misc = PERF_RECORD_MISC_KERNEL; 648 } else { 649 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 650 } 651 652 map = machine->vmlinux_maps[MAP__FUNCTION]; 653 kmap = map__kmap(map); 654 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 655 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1; 656 size = PERF_ALIGN(size, sizeof(u64)); 657 event->mmap.header.type = PERF_RECORD_MMAP; 658 event->mmap.header.size = (sizeof(event->mmap) - 659 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 660 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 661 event->mmap.start = map->start; 662 event->mmap.len = map->end - event->mmap.start; 663 event->mmap.pid = machine->pid; 664 665 err = process(tool, event, &synth_sample, machine); 666 free(event); 667 668 return err; 669 } 670 671 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 672 { 673 const char *s; 674 675 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 676 s = " exec"; 677 else 678 s = ""; 679 680 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 681 } 682 683 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 684 union perf_event *event, 685 struct perf_sample *sample, 686 struct machine *machine) 687 { 688 return machine__process_comm_event(machine, event, sample); 689 } 690 691 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 692 union perf_event *event, 693 struct perf_sample *sample, 694 struct machine *machine) 695 { 696 return machine__process_lost_event(machine, event, sample); 697 } 698 699 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 700 union perf_event *event, 701 struct perf_sample *sample __maybe_unused, 702 struct machine *machine) 703 { 704 return machine__process_aux_event(machine, event); 705 } 706 707 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 708 union perf_event *event, 709 struct perf_sample *sample __maybe_unused, 710 struct machine *machine) 711 { 712 return machine__process_itrace_start_event(machine, event); 713 } 714 715 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 716 { 717 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", 718 event->mmap.pid, event->mmap.tid, event->mmap.start, 719 event->mmap.len, event->mmap.pgoff, 720 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 721 event->mmap.filename); 722 } 723 724 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 725 { 726 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 727 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", 728 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 729 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 730 event->mmap2.min, event->mmap2.ino, 731 event->mmap2.ino_generation, 732 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 733 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 734 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 735 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 736 event->mmap2.filename); 737 } 738 739 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 740 union perf_event *event, 741 struct perf_sample *sample, 742 struct machine *machine) 743 { 744 return machine__process_mmap_event(machine, event, sample); 745 } 746 747 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 748 union perf_event *event, 749 struct perf_sample *sample, 750 struct machine *machine) 751 { 752 return machine__process_mmap2_event(machine, event, sample); 753 } 754 755 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 756 { 757 return fprintf(fp, "(%d:%d):(%d:%d)\n", 758 event->fork.pid, event->fork.tid, 759 event->fork.ppid, event->fork.ptid); 760 } 761 762 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 763 union perf_event *event, 764 struct perf_sample *sample, 765 struct machine *machine) 766 { 767 return machine__process_fork_event(machine, event, sample); 768 } 769 770 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 771 union perf_event *event, 772 struct perf_sample *sample, 773 struct machine *machine) 774 { 775 return machine__process_exit_event(machine, event, sample); 776 } 777 778 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 779 { 780 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n", 781 event->aux.aux_offset, event->aux.aux_size, 782 event->aux.flags, 783 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 784 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : ""); 785 } 786 787 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 788 { 789 return fprintf(fp, " pid: %u tid: %u\n", 790 event->itrace_start.pid, event->itrace_start.tid); 791 } 792 793 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 794 { 795 size_t ret = fprintf(fp, "PERF_RECORD_%s", 796 perf_event__name(event->header.type)); 797 798 switch (event->header.type) { 799 case PERF_RECORD_COMM: 800 ret += perf_event__fprintf_comm(event, fp); 801 break; 802 case PERF_RECORD_FORK: 803 case PERF_RECORD_EXIT: 804 ret += perf_event__fprintf_task(event, fp); 805 break; 806 case PERF_RECORD_MMAP: 807 ret += perf_event__fprintf_mmap(event, fp); 808 break; 809 case PERF_RECORD_MMAP2: 810 ret += perf_event__fprintf_mmap2(event, fp); 811 break; 812 case PERF_RECORD_AUX: 813 ret += perf_event__fprintf_aux(event, fp); 814 break; 815 case PERF_RECORD_ITRACE_START: 816 ret += perf_event__fprintf_itrace_start(event, fp); 817 break; 818 default: 819 ret += fprintf(fp, "\n"); 820 } 821 822 return ret; 823 } 824 825 int perf_event__process(struct perf_tool *tool __maybe_unused, 826 union perf_event *event, 827 struct perf_sample *sample, 828 struct machine *machine) 829 { 830 return machine__process_event(machine, event, sample); 831 } 832 833 void thread__find_addr_map(struct thread *thread, u8 cpumode, 834 enum map_type type, u64 addr, 835 struct addr_location *al) 836 { 837 struct map_groups *mg = thread->mg; 838 struct machine *machine = mg->machine; 839 bool load_map = false; 840 841 al->machine = machine; 842 al->thread = thread; 843 al->addr = addr; 844 al->cpumode = cpumode; 845 al->filtered = 0; 846 847 if (machine == NULL) { 848 al->map = NULL; 849 return; 850 } 851 852 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 853 al->level = 'k'; 854 mg = &machine->kmaps; 855 load_map = true; 856 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 857 al->level = '.'; 858 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 859 al->level = 'g'; 860 mg = &machine->kmaps; 861 load_map = true; 862 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 863 al->level = 'u'; 864 } else { 865 al->level = 'H'; 866 al->map = NULL; 867 868 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 869 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 870 !perf_guest) 871 al->filtered |= (1 << HIST_FILTER__GUEST); 872 if ((cpumode == PERF_RECORD_MISC_USER || 873 cpumode == PERF_RECORD_MISC_KERNEL) && 874 !perf_host) 875 al->filtered |= (1 << HIST_FILTER__HOST); 876 877 return; 878 } 879 try_again: 880 al->map = map_groups__find(mg, type, al->addr); 881 if (al->map == NULL) { 882 /* 883 * If this is outside of all known maps, and is a negative 884 * address, try to look it up in the kernel dso, as it might be 885 * a vsyscall or vdso (which executes in user-mode). 886 * 887 * XXX This is nasty, we should have a symbol list in the 888 * "[vdso]" dso, but for now lets use the old trick of looking 889 * in the whole kernel symbol list. 890 */ 891 if (cpumode == PERF_RECORD_MISC_USER && machine && 892 mg != &machine->kmaps && 893 machine__kernel_ip(machine, al->addr)) { 894 mg = &machine->kmaps; 895 load_map = true; 896 goto try_again; 897 } 898 } else { 899 /* 900 * Kernel maps might be changed when loading symbols so loading 901 * must be done prior to using kernel maps. 902 */ 903 if (load_map) 904 map__load(al->map, machine->symbol_filter); 905 al->addr = al->map->map_ip(al->map, al->addr); 906 } 907 } 908 909 void thread__find_addr_location(struct thread *thread, 910 u8 cpumode, enum map_type type, u64 addr, 911 struct addr_location *al) 912 { 913 thread__find_addr_map(thread, cpumode, type, addr, al); 914 if (al->map != NULL) 915 al->sym = map__find_symbol(al->map, al->addr, 916 thread->mg->machine->symbol_filter); 917 else 918 al->sym = NULL; 919 } 920 921 /* 922 * Callers need to drop the reference to al->thread, obtained in 923 * machine__findnew_thread() 924 */ 925 int perf_event__preprocess_sample(const union perf_event *event, 926 struct machine *machine, 927 struct addr_location *al, 928 struct perf_sample *sample) 929 { 930 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 931 struct thread *thread = machine__findnew_thread(machine, sample->pid, 932 sample->tid); 933 934 if (thread == NULL) 935 return -1; 936 937 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 938 /* 939 * Have we already created the kernel maps for this machine? 940 * 941 * This should have happened earlier, when we processed the kernel MMAP 942 * events, but for older perf.data files there was no such thing, so do 943 * it now. 944 */ 945 if (cpumode == PERF_RECORD_MISC_KERNEL && 946 machine->vmlinux_maps[MAP__FUNCTION] == NULL) 947 machine__create_kernel_maps(machine); 948 949 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al); 950 dump_printf(" ...... dso: %s\n", 951 al->map ? al->map->dso->long_name : 952 al->level == 'H' ? "[hypervisor]" : "<not found>"); 953 954 if (thread__is_filtered(thread)) 955 al->filtered |= (1 << HIST_FILTER__THREAD); 956 957 al->sym = NULL; 958 al->cpu = sample->cpu; 959 960 if (al->map) { 961 struct dso *dso = al->map->dso; 962 963 if (symbol_conf.dso_list && 964 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 965 dso->short_name) || 966 (dso->short_name != dso->long_name && 967 strlist__has_entry(symbol_conf.dso_list, 968 dso->long_name))))) { 969 al->filtered |= (1 << HIST_FILTER__DSO); 970 } 971 972 al->sym = map__find_symbol(al->map, al->addr, 973 machine->symbol_filter); 974 } 975 976 if (symbol_conf.sym_list && 977 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 978 al->sym->name))) { 979 al->filtered |= (1 << HIST_FILTER__SYMBOL); 980 } 981 982 return 0; 983 } 984 985 /* 986 * The preprocess_sample method will return with reference counts for the 987 * in it, when done using (and perhaps getting ref counts if needing to 988 * keep a pointer to one of those entries) it must be paired with 989 * addr_location__put(), so that the refcounts can be decremented. 990 */ 991 void addr_location__put(struct addr_location *al) 992 { 993 thread__zput(al->thread); 994 } 995 996 bool is_bts_event(struct perf_event_attr *attr) 997 { 998 return attr->type == PERF_TYPE_HARDWARE && 999 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1000 attr->sample_period == 1; 1001 } 1002 1003 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1004 { 1005 if (attr->type == PERF_TYPE_SOFTWARE && 1006 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1007 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1008 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1009 return true; 1010 1011 if (is_bts_event(attr)) 1012 return true; 1013 1014 return false; 1015 } 1016 1017 void perf_event__preprocess_sample_addr(union perf_event *event, 1018 struct perf_sample *sample, 1019 struct thread *thread, 1020 struct addr_location *al) 1021 { 1022 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 1023 1024 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al); 1025 if (!al->map) 1026 thread__find_addr_map(thread, cpumode, MAP__VARIABLE, 1027 sample->addr, al); 1028 1029 al->cpu = sample->cpu; 1030 al->sym = NULL; 1031 1032 if (al->map) 1033 al->sym = map__find_symbol(al->map, al->addr, NULL); 1034 } 1035