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 #include "asm/bug.h" 14 #include "stat.h" 15 16 static const char *perf_event__names[] = { 17 [0] = "TOTAL", 18 [PERF_RECORD_MMAP] = "MMAP", 19 [PERF_RECORD_MMAP2] = "MMAP2", 20 [PERF_RECORD_LOST] = "LOST", 21 [PERF_RECORD_COMM] = "COMM", 22 [PERF_RECORD_EXIT] = "EXIT", 23 [PERF_RECORD_THROTTLE] = "THROTTLE", 24 [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", 25 [PERF_RECORD_FORK] = "FORK", 26 [PERF_RECORD_READ] = "READ", 27 [PERF_RECORD_SAMPLE] = "SAMPLE", 28 [PERF_RECORD_AUX] = "AUX", 29 [PERF_RECORD_ITRACE_START] = "ITRACE_START", 30 [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES", 31 [PERF_RECORD_SWITCH] = "SWITCH", 32 [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE", 33 [PERF_RECORD_HEADER_ATTR] = "ATTR", 34 [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", 35 [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", 36 [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", 37 [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", 38 [PERF_RECORD_ID_INDEX] = "ID_INDEX", 39 [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO", 40 [PERF_RECORD_AUXTRACE] = "AUXTRACE", 41 [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR", 42 [PERF_RECORD_THREAD_MAP] = "THREAD_MAP", 43 [PERF_RECORD_CPU_MAP] = "CPU_MAP", 44 [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG", 45 [PERF_RECORD_STAT] = "STAT", 46 [PERF_RECORD_STAT_ROUND] = "STAT_ROUND", 47 [PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE", 48 }; 49 50 const char *perf_event__name(unsigned int id) 51 { 52 if (id >= ARRAY_SIZE(perf_event__names)) 53 return "INVALID"; 54 if (!perf_event__names[id]) 55 return "UNKNOWN"; 56 return perf_event__names[id]; 57 } 58 59 static int perf_tool__process_synth_event(struct perf_tool *tool, 60 union perf_event *event, 61 struct machine *machine, 62 perf_event__handler_t process) 63 { 64 struct perf_sample synth_sample = { 65 .pid = -1, 66 .tid = -1, 67 .time = -1, 68 .stream_id = -1, 69 .cpu = -1, 70 .period = 1, 71 .cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK, 72 }; 73 74 return process(tool, event, &synth_sample, machine); 75 }; 76 77 /* 78 * Assumes that the first 4095 bytes of /proc/pid/stat contains 79 * the comm, tgid and ppid. 80 */ 81 static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, 82 pid_t *tgid, pid_t *ppid) 83 { 84 char filename[PATH_MAX]; 85 char bf[4096]; 86 int fd; 87 size_t size = 0; 88 ssize_t n; 89 char *nl, *name, *tgids, *ppids; 90 91 *tgid = -1; 92 *ppid = -1; 93 94 snprintf(filename, sizeof(filename), "/proc/%d/status", pid); 95 96 fd = open(filename, O_RDONLY); 97 if (fd < 0) { 98 pr_debug("couldn't open %s\n", filename); 99 return -1; 100 } 101 102 n = read(fd, bf, sizeof(bf) - 1); 103 close(fd); 104 if (n <= 0) { 105 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", 106 pid); 107 return -1; 108 } 109 bf[n] = '\0'; 110 111 name = strstr(bf, "Name:"); 112 tgids = strstr(bf, "Tgid:"); 113 ppids = strstr(bf, "PPid:"); 114 115 if (name) { 116 name += 5; /* strlen("Name:") */ 117 118 while (*name && isspace(*name)) 119 ++name; 120 121 nl = strchr(name, '\n'); 122 if (nl) 123 *nl = '\0'; 124 125 size = strlen(name); 126 if (size >= len) 127 size = len - 1; 128 memcpy(comm, name, size); 129 comm[size] = '\0'; 130 } else { 131 pr_debug("Name: string not found for pid %d\n", pid); 132 } 133 134 if (tgids) { 135 tgids += 5; /* strlen("Tgid:") */ 136 *tgid = atoi(tgids); 137 } else { 138 pr_debug("Tgid: string not found for pid %d\n", pid); 139 } 140 141 if (ppids) { 142 ppids += 5; /* strlen("PPid:") */ 143 *ppid = atoi(ppids); 144 } else { 145 pr_debug("PPid: string not found for pid %d\n", pid); 146 } 147 148 return 0; 149 } 150 151 static int perf_event__prepare_comm(union perf_event *event, pid_t pid, 152 struct machine *machine, 153 pid_t *tgid, pid_t *ppid) 154 { 155 size_t size; 156 157 *ppid = -1; 158 159 memset(&event->comm, 0, sizeof(event->comm)); 160 161 if (machine__is_host(machine)) { 162 if (perf_event__get_comm_ids(pid, event->comm.comm, 163 sizeof(event->comm.comm), 164 tgid, ppid) != 0) { 165 return -1; 166 } 167 } else { 168 *tgid = machine->pid; 169 } 170 171 if (*tgid < 0) 172 return -1; 173 174 event->comm.pid = *tgid; 175 event->comm.header.type = PERF_RECORD_COMM; 176 177 size = strlen(event->comm.comm) + 1; 178 size = PERF_ALIGN(size, sizeof(u64)); 179 memset(event->comm.comm + size, 0, machine->id_hdr_size); 180 event->comm.header.size = (sizeof(event->comm) - 181 (sizeof(event->comm.comm) - size) + 182 machine->id_hdr_size); 183 event->comm.tid = pid; 184 185 return 0; 186 } 187 188 pid_t perf_event__synthesize_comm(struct perf_tool *tool, 189 union perf_event *event, pid_t pid, 190 perf_event__handler_t process, 191 struct machine *machine) 192 { 193 pid_t tgid, ppid; 194 195 if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) 196 return -1; 197 198 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 199 return -1; 200 201 return tgid; 202 } 203 204 static int perf_event__synthesize_fork(struct perf_tool *tool, 205 union perf_event *event, 206 pid_t pid, pid_t tgid, pid_t ppid, 207 perf_event__handler_t process, 208 struct machine *machine) 209 { 210 memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); 211 212 /* 213 * for main thread set parent to ppid from status file. For other 214 * threads set parent pid to main thread. ie., assume main thread 215 * spawns all threads in a process 216 */ 217 if (tgid == pid) { 218 event->fork.ppid = ppid; 219 event->fork.ptid = ppid; 220 } else { 221 event->fork.ppid = tgid; 222 event->fork.ptid = tgid; 223 } 224 event->fork.pid = tgid; 225 event->fork.tid = pid; 226 event->fork.header.type = PERF_RECORD_FORK; 227 228 event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); 229 230 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) 231 return -1; 232 233 return 0; 234 } 235 236 int perf_event__synthesize_mmap_events(struct perf_tool *tool, 237 union perf_event *event, 238 pid_t pid, pid_t tgid, 239 perf_event__handler_t process, 240 struct machine *machine, 241 bool mmap_data, 242 unsigned int proc_map_timeout) 243 { 244 char filename[PATH_MAX]; 245 FILE *fp; 246 unsigned long long t; 247 bool truncation = false; 248 unsigned long long timeout = proc_map_timeout * 1000000ULL; 249 int rc = 0; 250 251 if (machine__is_default_guest(machine)) 252 return 0; 253 254 snprintf(filename, sizeof(filename), "%s/proc/%d/maps", 255 machine->root_dir, pid); 256 257 fp = fopen(filename, "r"); 258 if (fp == NULL) { 259 /* 260 * We raced with a task exiting - just return: 261 */ 262 pr_debug("couldn't open %s\n", filename); 263 return -1; 264 } 265 266 event->header.type = PERF_RECORD_MMAP2; 267 t = rdclock(); 268 269 while (1) { 270 char bf[BUFSIZ]; 271 char prot[5]; 272 char execname[PATH_MAX]; 273 char anonstr[] = "//anon"; 274 unsigned int ino; 275 size_t size; 276 ssize_t n; 277 278 if (fgets(bf, sizeof(bf), fp) == NULL) 279 break; 280 281 if ((rdclock() - t) > timeout) { 282 pr_warning("Reading %s time out. " 283 "You may want to increase " 284 "the time limit by --proc-map-timeout\n", 285 filename); 286 truncation = true; 287 goto out; 288 } 289 290 /* ensure null termination since stack will be reused. */ 291 strcpy(execname, ""); 292 293 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ 294 n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n", 295 &event->mmap2.start, &event->mmap2.len, prot, 296 &event->mmap2.pgoff, &event->mmap2.maj, 297 &event->mmap2.min, 298 &ino, execname); 299 300 /* 301 * Anon maps don't have the execname. 302 */ 303 if (n < 7) 304 continue; 305 306 event->mmap2.ino = (u64)ino; 307 308 /* 309 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c 310 */ 311 if (machine__is_host(machine)) 312 event->header.misc = PERF_RECORD_MISC_USER; 313 else 314 event->header.misc = PERF_RECORD_MISC_GUEST_USER; 315 316 /* map protection and flags bits */ 317 event->mmap2.prot = 0; 318 event->mmap2.flags = 0; 319 if (prot[0] == 'r') 320 event->mmap2.prot |= PROT_READ; 321 if (prot[1] == 'w') 322 event->mmap2.prot |= PROT_WRITE; 323 if (prot[2] == 'x') 324 event->mmap2.prot |= PROT_EXEC; 325 326 if (prot[3] == 's') 327 event->mmap2.flags |= MAP_SHARED; 328 else 329 event->mmap2.flags |= MAP_PRIVATE; 330 331 if (prot[2] != 'x') { 332 if (!mmap_data || prot[0] != 'r') 333 continue; 334 335 event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; 336 } 337 338 out: 339 if (truncation) 340 event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; 341 342 if (!strcmp(execname, "")) 343 strcpy(execname, anonstr); 344 345 size = strlen(execname) + 1; 346 memcpy(event->mmap2.filename, execname, size); 347 size = PERF_ALIGN(size, sizeof(u64)); 348 event->mmap2.len -= event->mmap.start; 349 event->mmap2.header.size = (sizeof(event->mmap2) - 350 (sizeof(event->mmap2.filename) - size)); 351 memset(event->mmap2.filename + size, 0, machine->id_hdr_size); 352 event->mmap2.header.size += machine->id_hdr_size; 353 event->mmap2.pid = tgid; 354 event->mmap2.tid = pid; 355 356 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 357 rc = -1; 358 break; 359 } 360 361 if (truncation) 362 break; 363 } 364 365 fclose(fp); 366 return rc; 367 } 368 369 int perf_event__synthesize_modules(struct perf_tool *tool, 370 perf_event__handler_t process, 371 struct machine *machine) 372 { 373 int rc = 0; 374 struct map *pos; 375 struct map_groups *kmaps = &machine->kmaps; 376 struct maps *maps = &kmaps->maps[MAP__FUNCTION]; 377 union perf_event *event = zalloc((sizeof(event->mmap) + 378 machine->id_hdr_size)); 379 if (event == NULL) { 380 pr_debug("Not enough memory synthesizing mmap event " 381 "for kernel modules\n"); 382 return -1; 383 } 384 385 event->header.type = PERF_RECORD_MMAP; 386 387 /* 388 * kernel uses 0 for user space maps, see kernel/perf_event.c 389 * __perf_event_mmap 390 */ 391 if (machine__is_host(machine)) 392 event->header.misc = PERF_RECORD_MISC_KERNEL; 393 else 394 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 395 396 for (pos = maps__first(maps); pos; pos = map__next(pos)) { 397 size_t size; 398 399 if (__map__is_kernel(pos)) 400 continue; 401 402 size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); 403 event->mmap.header.type = PERF_RECORD_MMAP; 404 event->mmap.header.size = (sizeof(event->mmap) - 405 (sizeof(event->mmap.filename) - size)); 406 memset(event->mmap.filename + size, 0, machine->id_hdr_size); 407 event->mmap.header.size += machine->id_hdr_size; 408 event->mmap.start = pos->start; 409 event->mmap.len = pos->end - pos->start; 410 event->mmap.pid = machine->pid; 411 412 memcpy(event->mmap.filename, pos->dso->long_name, 413 pos->dso->long_name_len + 1); 414 if (perf_tool__process_synth_event(tool, event, machine, process) != 0) { 415 rc = -1; 416 break; 417 } 418 } 419 420 free(event); 421 return rc; 422 } 423 424 static int __event__synthesize_thread(union perf_event *comm_event, 425 union perf_event *mmap_event, 426 union perf_event *fork_event, 427 pid_t pid, int full, 428 perf_event__handler_t process, 429 struct perf_tool *tool, 430 struct machine *machine, 431 bool mmap_data, 432 unsigned int proc_map_timeout) 433 { 434 char filename[PATH_MAX]; 435 DIR *tasks; 436 struct dirent dirent, *next; 437 pid_t tgid, ppid; 438 int rc = 0; 439 440 /* special case: only send one comm event using passed in pid */ 441 if (!full) { 442 tgid = perf_event__synthesize_comm(tool, comm_event, pid, 443 process, machine); 444 445 if (tgid == -1) 446 return -1; 447 448 return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 449 process, machine, mmap_data, 450 proc_map_timeout); 451 } 452 453 if (machine__is_default_guest(machine)) 454 return 0; 455 456 snprintf(filename, sizeof(filename), "%s/proc/%d/task", 457 machine->root_dir, pid); 458 459 tasks = opendir(filename); 460 if (tasks == NULL) { 461 pr_debug("couldn't open %s\n", filename); 462 return 0; 463 } 464 465 while (!readdir_r(tasks, &dirent, &next) && next) { 466 char *end; 467 pid_t _pid; 468 469 _pid = strtol(dirent.d_name, &end, 10); 470 if (*end) 471 continue; 472 473 rc = -1; 474 if (perf_event__prepare_comm(comm_event, _pid, machine, 475 &tgid, &ppid) != 0) 476 break; 477 478 if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, 479 ppid, process, machine) < 0) 480 break; 481 /* 482 * Send the prepared comm event 483 */ 484 if (perf_tool__process_synth_event(tool, comm_event, machine, process) != 0) 485 break; 486 487 rc = 0; 488 if (_pid == pid) { 489 /* process the parent's maps too */ 490 rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, 491 process, machine, mmap_data, proc_map_timeout); 492 if (rc) 493 break; 494 } 495 } 496 497 closedir(tasks); 498 return rc; 499 } 500 501 int perf_event__synthesize_thread_map(struct perf_tool *tool, 502 struct thread_map *threads, 503 perf_event__handler_t process, 504 struct machine *machine, 505 bool mmap_data, 506 unsigned int proc_map_timeout) 507 { 508 union perf_event *comm_event, *mmap_event, *fork_event; 509 int err = -1, thread, j; 510 511 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 512 if (comm_event == NULL) 513 goto out; 514 515 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 516 if (mmap_event == NULL) 517 goto out_free_comm; 518 519 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 520 if (fork_event == NULL) 521 goto out_free_mmap; 522 523 err = 0; 524 for (thread = 0; thread < threads->nr; ++thread) { 525 if (__event__synthesize_thread(comm_event, mmap_event, 526 fork_event, 527 thread_map__pid(threads, thread), 0, 528 process, tool, machine, 529 mmap_data, proc_map_timeout)) { 530 err = -1; 531 break; 532 } 533 534 /* 535 * comm.pid is set to thread group id by 536 * perf_event__synthesize_comm 537 */ 538 if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) { 539 bool need_leader = true; 540 541 /* is thread group leader in thread_map? */ 542 for (j = 0; j < threads->nr; ++j) { 543 if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) { 544 need_leader = false; 545 break; 546 } 547 } 548 549 /* if not, generate events for it */ 550 if (need_leader && 551 __event__synthesize_thread(comm_event, mmap_event, 552 fork_event, 553 comm_event->comm.pid, 0, 554 process, tool, machine, 555 mmap_data, proc_map_timeout)) { 556 err = -1; 557 break; 558 } 559 } 560 } 561 free(fork_event); 562 out_free_mmap: 563 free(mmap_event); 564 out_free_comm: 565 free(comm_event); 566 out: 567 return err; 568 } 569 570 int perf_event__synthesize_threads(struct perf_tool *tool, 571 perf_event__handler_t process, 572 struct machine *machine, 573 bool mmap_data, 574 unsigned int proc_map_timeout) 575 { 576 DIR *proc; 577 char proc_path[PATH_MAX]; 578 struct dirent dirent, *next; 579 union perf_event *comm_event, *mmap_event, *fork_event; 580 int err = -1; 581 582 if (machine__is_default_guest(machine)) 583 return 0; 584 585 comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); 586 if (comm_event == NULL) 587 goto out; 588 589 mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size); 590 if (mmap_event == NULL) 591 goto out_free_comm; 592 593 fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); 594 if (fork_event == NULL) 595 goto out_free_mmap; 596 597 snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); 598 proc = opendir(proc_path); 599 600 if (proc == NULL) 601 goto out_free_fork; 602 603 while (!readdir_r(proc, &dirent, &next) && next) { 604 char *end; 605 pid_t pid = strtol(dirent.d_name, &end, 10); 606 607 if (*end) /* only interested in proper numerical dirents */ 608 continue; 609 /* 610 * We may race with exiting thread, so don't stop just because 611 * one thread couldn't be synthesized. 612 */ 613 __event__synthesize_thread(comm_event, mmap_event, fork_event, pid, 614 1, process, tool, machine, mmap_data, 615 proc_map_timeout); 616 } 617 618 err = 0; 619 closedir(proc); 620 out_free_fork: 621 free(fork_event); 622 out_free_mmap: 623 free(mmap_event); 624 out_free_comm: 625 free(comm_event); 626 out: 627 return err; 628 } 629 630 struct process_symbol_args { 631 const char *name; 632 u64 start; 633 }; 634 635 static int find_symbol_cb(void *arg, const char *name, char type, 636 u64 start) 637 { 638 struct process_symbol_args *args = arg; 639 640 /* 641 * Must be a function or at least an alias, as in PARISC64, where "_text" is 642 * an 'A' to the same address as "_stext". 643 */ 644 if (!(symbol_type__is_a(type, MAP__FUNCTION) || 645 type == 'A') || strcmp(name, args->name)) 646 return 0; 647 648 args->start = start; 649 return 1; 650 } 651 652 u64 kallsyms__get_function_start(const char *kallsyms_filename, 653 const char *symbol_name) 654 { 655 struct process_symbol_args args = { .name = symbol_name, }; 656 657 if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) 658 return 0; 659 660 return args.start; 661 } 662 663 int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, 664 perf_event__handler_t process, 665 struct machine *machine) 666 { 667 size_t size; 668 const char *mmap_name; 669 char name_buff[PATH_MAX]; 670 struct map *map = machine__kernel_map(machine); 671 struct kmap *kmap; 672 int err; 673 union perf_event *event; 674 675 if (map == NULL) 676 return -1; 677 678 /* 679 * We should get this from /sys/kernel/sections/.text, but till that is 680 * available use this, and after it is use this as a fallback for older 681 * kernels. 682 */ 683 event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); 684 if (event == NULL) { 685 pr_debug("Not enough memory synthesizing mmap event " 686 "for kernel modules\n"); 687 return -1; 688 } 689 690 mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); 691 if (machine__is_host(machine)) { 692 /* 693 * kernel uses PERF_RECORD_MISC_USER for user space maps, 694 * see kernel/perf_event.c __perf_event_mmap 695 */ 696 event->header.misc = PERF_RECORD_MISC_KERNEL; 697 } else { 698 event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; 699 } 700 701 kmap = map__kmap(map); 702 size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), 703 "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1; 704 size = PERF_ALIGN(size, sizeof(u64)); 705 event->mmap.header.type = PERF_RECORD_MMAP; 706 event->mmap.header.size = (sizeof(event->mmap) - 707 (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); 708 event->mmap.pgoff = kmap->ref_reloc_sym->addr; 709 event->mmap.start = map->start; 710 event->mmap.len = map->end - event->mmap.start; 711 event->mmap.pid = machine->pid; 712 713 err = perf_tool__process_synth_event(tool, event, machine, process); 714 free(event); 715 716 return err; 717 } 718 719 int perf_event__synthesize_thread_map2(struct perf_tool *tool, 720 struct thread_map *threads, 721 perf_event__handler_t process, 722 struct machine *machine) 723 { 724 union perf_event *event; 725 int i, err, size; 726 727 size = sizeof(event->thread_map); 728 size += threads->nr * sizeof(event->thread_map.entries[0]); 729 730 event = zalloc(size); 731 if (!event) 732 return -ENOMEM; 733 734 event->header.type = PERF_RECORD_THREAD_MAP; 735 event->header.size = size; 736 event->thread_map.nr = threads->nr; 737 738 for (i = 0; i < threads->nr; i++) { 739 struct thread_map_event_entry *entry = &event->thread_map.entries[i]; 740 char *comm = thread_map__comm(threads, i); 741 742 if (!comm) 743 comm = (char *) ""; 744 745 entry->pid = thread_map__pid(threads, i); 746 strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); 747 } 748 749 err = process(tool, event, NULL, machine); 750 751 free(event); 752 return err; 753 } 754 755 static void synthesize_cpus(struct cpu_map_entries *cpus, 756 struct cpu_map *map) 757 { 758 int i; 759 760 cpus->nr = map->nr; 761 762 for (i = 0; i < map->nr; i++) 763 cpus->cpu[i] = map->map[i]; 764 } 765 766 static void synthesize_mask(struct cpu_map_mask *mask, 767 struct cpu_map *map, int max) 768 { 769 int i; 770 771 mask->nr = BITS_TO_LONGS(max); 772 mask->long_size = sizeof(long); 773 774 for (i = 0; i < map->nr; i++) 775 set_bit(map->map[i], mask->mask); 776 } 777 778 static size_t cpus_size(struct cpu_map *map) 779 { 780 return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); 781 } 782 783 static size_t mask_size(struct cpu_map *map, int *max) 784 { 785 int i; 786 787 *max = 0; 788 789 for (i = 0; i < map->nr; i++) { 790 /* bit possition of the cpu is + 1 */ 791 int bit = map->map[i] + 1; 792 793 if (bit > *max) 794 *max = bit; 795 } 796 797 return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long); 798 } 799 800 void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max) 801 { 802 size_t size_cpus, size_mask; 803 bool is_dummy = cpu_map__empty(map); 804 805 /* 806 * Both array and mask data have variable size based 807 * on the number of cpus and their actual values. 808 * The size of the 'struct cpu_map_data' is: 809 * 810 * array = size of 'struct cpu_map_entries' + 811 * number of cpus * sizeof(u64) 812 * 813 * mask = size of 'struct cpu_map_mask' + 814 * maximum cpu bit converted to size of longs 815 * 816 * and finaly + the size of 'struct cpu_map_data'. 817 */ 818 size_cpus = cpus_size(map); 819 size_mask = mask_size(map, max); 820 821 if (is_dummy || (size_cpus < size_mask)) { 822 *size += size_cpus; 823 *type = PERF_CPU_MAP__CPUS; 824 } else { 825 *size += size_mask; 826 *type = PERF_CPU_MAP__MASK; 827 } 828 829 *size += sizeof(struct cpu_map_data); 830 return zalloc(*size); 831 } 832 833 void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map, 834 u16 type, int max) 835 { 836 data->type = type; 837 838 switch (type) { 839 case PERF_CPU_MAP__CPUS: 840 synthesize_cpus((struct cpu_map_entries *) data->data, map); 841 break; 842 case PERF_CPU_MAP__MASK: 843 synthesize_mask((struct cpu_map_mask *) data->data, map, max); 844 default: 845 break; 846 }; 847 } 848 849 static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map) 850 { 851 size_t size = sizeof(struct cpu_map_event); 852 struct cpu_map_event *event; 853 int max; 854 u16 type; 855 856 event = cpu_map_data__alloc(map, &size, &type, &max); 857 if (!event) 858 return NULL; 859 860 event->header.type = PERF_RECORD_CPU_MAP; 861 event->header.size = size; 862 event->data.type = type; 863 864 cpu_map_data__synthesize(&event->data, map, type, max); 865 return event; 866 } 867 868 int perf_event__synthesize_cpu_map(struct perf_tool *tool, 869 struct cpu_map *map, 870 perf_event__handler_t process, 871 struct machine *machine) 872 { 873 struct cpu_map_event *event; 874 int err; 875 876 event = cpu_map_event__new(map); 877 if (!event) 878 return -ENOMEM; 879 880 err = process(tool, (union perf_event *) event, NULL, machine); 881 882 free(event); 883 return err; 884 } 885 886 int perf_event__synthesize_stat_config(struct perf_tool *tool, 887 struct perf_stat_config *config, 888 perf_event__handler_t process, 889 struct machine *machine) 890 { 891 struct stat_config_event *event; 892 int size, i = 0, err; 893 894 size = sizeof(*event); 895 size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); 896 897 event = zalloc(size); 898 if (!event) 899 return -ENOMEM; 900 901 event->header.type = PERF_RECORD_STAT_CONFIG; 902 event->header.size = size; 903 event->nr = PERF_STAT_CONFIG_TERM__MAX; 904 905 #define ADD(__term, __val) \ 906 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ 907 event->data[i].val = __val; \ 908 i++; 909 910 ADD(AGGR_MODE, config->aggr_mode) 911 ADD(INTERVAL, config->interval) 912 ADD(SCALE, config->scale) 913 914 WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, 915 "stat config terms unbalanced\n"); 916 #undef ADD 917 918 err = process(tool, (union perf_event *) event, NULL, machine); 919 920 free(event); 921 return err; 922 } 923 924 int perf_event__synthesize_stat(struct perf_tool *tool, 925 u32 cpu, u32 thread, u64 id, 926 struct perf_counts_values *count, 927 perf_event__handler_t process, 928 struct machine *machine) 929 { 930 struct stat_event event; 931 932 event.header.type = PERF_RECORD_STAT; 933 event.header.size = sizeof(event); 934 event.header.misc = 0; 935 936 event.id = id; 937 event.cpu = cpu; 938 event.thread = thread; 939 event.val = count->val; 940 event.ena = count->ena; 941 event.run = count->run; 942 943 return process(tool, (union perf_event *) &event, NULL, machine); 944 } 945 946 int perf_event__synthesize_stat_round(struct perf_tool *tool, 947 u64 evtime, u64 type, 948 perf_event__handler_t process, 949 struct machine *machine) 950 { 951 struct stat_round_event event; 952 953 event.header.type = PERF_RECORD_STAT_ROUND; 954 event.header.size = sizeof(event); 955 event.header.misc = 0; 956 957 event.time = evtime; 958 event.type = type; 959 960 return process(tool, (union perf_event *) &event, NULL, machine); 961 } 962 963 void perf_event__read_stat_config(struct perf_stat_config *config, 964 struct stat_config_event *event) 965 { 966 unsigned i; 967 968 for (i = 0; i < event->nr; i++) { 969 970 switch (event->data[i].tag) { 971 #define CASE(__term, __val) \ 972 case PERF_STAT_CONFIG_TERM__##__term: \ 973 config->__val = event->data[i].val; \ 974 break; 975 976 CASE(AGGR_MODE, aggr_mode) 977 CASE(SCALE, scale) 978 CASE(INTERVAL, interval) 979 #undef CASE 980 default: 981 pr_warning("unknown stat config term %" PRIu64 "\n", 982 event->data[i].tag); 983 } 984 } 985 } 986 987 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) 988 { 989 const char *s; 990 991 if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) 992 s = " exec"; 993 else 994 s = ""; 995 996 return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); 997 } 998 999 int perf_event__process_comm(struct perf_tool *tool __maybe_unused, 1000 union perf_event *event, 1001 struct perf_sample *sample, 1002 struct machine *machine) 1003 { 1004 return machine__process_comm_event(machine, event, sample); 1005 } 1006 1007 int perf_event__process_lost(struct perf_tool *tool __maybe_unused, 1008 union perf_event *event, 1009 struct perf_sample *sample, 1010 struct machine *machine) 1011 { 1012 return machine__process_lost_event(machine, event, sample); 1013 } 1014 1015 int perf_event__process_aux(struct perf_tool *tool __maybe_unused, 1016 union perf_event *event, 1017 struct perf_sample *sample __maybe_unused, 1018 struct machine *machine) 1019 { 1020 return machine__process_aux_event(machine, event); 1021 } 1022 1023 int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, 1024 union perf_event *event, 1025 struct perf_sample *sample __maybe_unused, 1026 struct machine *machine) 1027 { 1028 return machine__process_itrace_start_event(machine, event); 1029 } 1030 1031 int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused, 1032 union perf_event *event, 1033 struct perf_sample *sample, 1034 struct machine *machine) 1035 { 1036 return machine__process_lost_samples_event(machine, event, sample); 1037 } 1038 1039 int perf_event__process_switch(struct perf_tool *tool __maybe_unused, 1040 union perf_event *event, 1041 struct perf_sample *sample __maybe_unused, 1042 struct machine *machine) 1043 { 1044 return machine__process_switch_event(machine, event); 1045 } 1046 1047 size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) 1048 { 1049 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", 1050 event->mmap.pid, event->mmap.tid, event->mmap.start, 1051 event->mmap.len, event->mmap.pgoff, 1052 (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', 1053 event->mmap.filename); 1054 } 1055 1056 size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) 1057 { 1058 return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 1059 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", 1060 event->mmap2.pid, event->mmap2.tid, event->mmap2.start, 1061 event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, 1062 event->mmap2.min, event->mmap2.ino, 1063 event->mmap2.ino_generation, 1064 (event->mmap2.prot & PROT_READ) ? 'r' : '-', 1065 (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', 1066 (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', 1067 (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', 1068 event->mmap2.filename); 1069 } 1070 1071 size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) 1072 { 1073 struct thread_map *threads = thread_map__new_event(&event->thread_map); 1074 size_t ret; 1075 1076 ret = fprintf(fp, " nr: "); 1077 1078 if (threads) 1079 ret += thread_map__fprintf(threads, fp); 1080 else 1081 ret += fprintf(fp, "failed to get threads from event\n"); 1082 1083 thread_map__put(threads); 1084 return ret; 1085 } 1086 1087 size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) 1088 { 1089 struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); 1090 size_t ret; 1091 1092 ret = fprintf(fp, " nr: "); 1093 1094 if (cpus) 1095 ret += cpu_map__fprintf(cpus, fp); 1096 else 1097 ret += fprintf(fp, "failed to get cpumap from event\n"); 1098 1099 cpu_map__put(cpus); 1100 return ret; 1101 } 1102 1103 int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, 1104 union perf_event *event, 1105 struct perf_sample *sample, 1106 struct machine *machine) 1107 { 1108 return machine__process_mmap_event(machine, event, sample); 1109 } 1110 1111 int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, 1112 union perf_event *event, 1113 struct perf_sample *sample, 1114 struct machine *machine) 1115 { 1116 return machine__process_mmap2_event(machine, event, sample); 1117 } 1118 1119 size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) 1120 { 1121 return fprintf(fp, "(%d:%d):(%d:%d)\n", 1122 event->fork.pid, event->fork.tid, 1123 event->fork.ppid, event->fork.ptid); 1124 } 1125 1126 int perf_event__process_fork(struct perf_tool *tool __maybe_unused, 1127 union perf_event *event, 1128 struct perf_sample *sample, 1129 struct machine *machine) 1130 { 1131 return machine__process_fork_event(machine, event, sample); 1132 } 1133 1134 int perf_event__process_exit(struct perf_tool *tool __maybe_unused, 1135 union perf_event *event, 1136 struct perf_sample *sample, 1137 struct machine *machine) 1138 { 1139 return machine__process_exit_event(machine, event, sample); 1140 } 1141 1142 size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) 1143 { 1144 return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n", 1145 event->aux.aux_offset, event->aux.aux_size, 1146 event->aux.flags, 1147 event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", 1148 event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : ""); 1149 } 1150 1151 size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) 1152 { 1153 return fprintf(fp, " pid: %u tid: %u\n", 1154 event->itrace_start.pid, event->itrace_start.tid); 1155 } 1156 1157 size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) 1158 { 1159 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; 1160 const char *in_out = out ? "OUT" : "IN "; 1161 1162 if (event->header.type == PERF_RECORD_SWITCH) 1163 return fprintf(fp, " %s\n", in_out); 1164 1165 return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", 1166 in_out, out ? "next" : "prev", 1167 event->context_switch.next_prev_pid, 1168 event->context_switch.next_prev_tid); 1169 } 1170 1171 size_t perf_event__fprintf(union perf_event *event, FILE *fp) 1172 { 1173 size_t ret = fprintf(fp, "PERF_RECORD_%s", 1174 perf_event__name(event->header.type)); 1175 1176 switch (event->header.type) { 1177 case PERF_RECORD_COMM: 1178 ret += perf_event__fprintf_comm(event, fp); 1179 break; 1180 case PERF_RECORD_FORK: 1181 case PERF_RECORD_EXIT: 1182 ret += perf_event__fprintf_task(event, fp); 1183 break; 1184 case PERF_RECORD_MMAP: 1185 ret += perf_event__fprintf_mmap(event, fp); 1186 break; 1187 case PERF_RECORD_MMAP2: 1188 ret += perf_event__fprintf_mmap2(event, fp); 1189 break; 1190 case PERF_RECORD_AUX: 1191 ret += perf_event__fprintf_aux(event, fp); 1192 break; 1193 case PERF_RECORD_ITRACE_START: 1194 ret += perf_event__fprintf_itrace_start(event, fp); 1195 break; 1196 case PERF_RECORD_SWITCH: 1197 case PERF_RECORD_SWITCH_CPU_WIDE: 1198 ret += perf_event__fprintf_switch(event, fp); 1199 break; 1200 default: 1201 ret += fprintf(fp, "\n"); 1202 } 1203 1204 return ret; 1205 } 1206 1207 int perf_event__process(struct perf_tool *tool __maybe_unused, 1208 union perf_event *event, 1209 struct perf_sample *sample, 1210 struct machine *machine) 1211 { 1212 return machine__process_event(machine, event, sample); 1213 } 1214 1215 void thread__find_addr_map(struct thread *thread, u8 cpumode, 1216 enum map_type type, u64 addr, 1217 struct addr_location *al) 1218 { 1219 struct map_groups *mg = thread->mg; 1220 struct machine *machine = mg->machine; 1221 bool load_map = false; 1222 1223 al->machine = machine; 1224 al->thread = thread; 1225 al->addr = addr; 1226 al->cpumode = cpumode; 1227 al->filtered = 0; 1228 1229 if (machine == NULL) { 1230 al->map = NULL; 1231 return; 1232 } 1233 1234 if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { 1235 al->level = 'k'; 1236 mg = &machine->kmaps; 1237 load_map = true; 1238 } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { 1239 al->level = '.'; 1240 } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 1241 al->level = 'g'; 1242 mg = &machine->kmaps; 1243 load_map = true; 1244 } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { 1245 al->level = 'u'; 1246 } else { 1247 al->level = 'H'; 1248 al->map = NULL; 1249 1250 if ((cpumode == PERF_RECORD_MISC_GUEST_USER || 1251 cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && 1252 !perf_guest) 1253 al->filtered |= (1 << HIST_FILTER__GUEST); 1254 if ((cpumode == PERF_RECORD_MISC_USER || 1255 cpumode == PERF_RECORD_MISC_KERNEL) && 1256 !perf_host) 1257 al->filtered |= (1 << HIST_FILTER__HOST); 1258 1259 return; 1260 } 1261 try_again: 1262 al->map = map_groups__find(mg, type, al->addr); 1263 if (al->map == NULL) { 1264 /* 1265 * If this is outside of all known maps, and is a negative 1266 * address, try to look it up in the kernel dso, as it might be 1267 * a vsyscall or vdso (which executes in user-mode). 1268 * 1269 * XXX This is nasty, we should have a symbol list in the 1270 * "[vdso]" dso, but for now lets use the old trick of looking 1271 * in the whole kernel symbol list. 1272 */ 1273 if (cpumode == PERF_RECORD_MISC_USER && machine && 1274 mg != &machine->kmaps && 1275 machine__kernel_ip(machine, al->addr)) { 1276 mg = &machine->kmaps; 1277 load_map = true; 1278 goto try_again; 1279 } 1280 } else { 1281 /* 1282 * Kernel maps might be changed when loading symbols so loading 1283 * must be done prior to using kernel maps. 1284 */ 1285 if (load_map) 1286 map__load(al->map, machine->symbol_filter); 1287 al->addr = al->map->map_ip(al->map, al->addr); 1288 } 1289 } 1290 1291 void thread__find_addr_location(struct thread *thread, 1292 u8 cpumode, enum map_type type, u64 addr, 1293 struct addr_location *al) 1294 { 1295 thread__find_addr_map(thread, cpumode, type, addr, al); 1296 if (al->map != NULL) 1297 al->sym = map__find_symbol(al->map, al->addr, 1298 thread->mg->machine->symbol_filter); 1299 else 1300 al->sym = NULL; 1301 } 1302 1303 /* 1304 * Callers need to drop the reference to al->thread, obtained in 1305 * machine__findnew_thread() 1306 */ 1307 int machine__resolve(struct machine *machine, struct addr_location *al, 1308 struct perf_sample *sample) 1309 { 1310 struct thread *thread = machine__findnew_thread(machine, sample->pid, 1311 sample->tid); 1312 1313 if (thread == NULL) 1314 return -1; 1315 1316 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); 1317 /* 1318 * Have we already created the kernel maps for this machine? 1319 * 1320 * This should have happened earlier, when we processed the kernel MMAP 1321 * events, but for older perf.data files there was no such thing, so do 1322 * it now. 1323 */ 1324 if (sample->cpumode == PERF_RECORD_MISC_KERNEL && 1325 machine__kernel_map(machine) == NULL) 1326 machine__create_kernel_maps(machine); 1327 1328 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, al); 1329 dump_printf(" ...... dso: %s\n", 1330 al->map ? al->map->dso->long_name : 1331 al->level == 'H' ? "[hypervisor]" : "<not found>"); 1332 1333 if (thread__is_filtered(thread)) 1334 al->filtered |= (1 << HIST_FILTER__THREAD); 1335 1336 al->sym = NULL; 1337 al->cpu = sample->cpu; 1338 al->socket = -1; 1339 1340 if (al->cpu >= 0) { 1341 struct perf_env *env = machine->env; 1342 1343 if (env && env->cpu) 1344 al->socket = env->cpu[al->cpu].socket_id; 1345 } 1346 1347 if (al->map) { 1348 struct dso *dso = al->map->dso; 1349 1350 if (symbol_conf.dso_list && 1351 (!dso || !(strlist__has_entry(symbol_conf.dso_list, 1352 dso->short_name) || 1353 (dso->short_name != dso->long_name && 1354 strlist__has_entry(symbol_conf.dso_list, 1355 dso->long_name))))) { 1356 al->filtered |= (1 << HIST_FILTER__DSO); 1357 } 1358 1359 al->sym = map__find_symbol(al->map, al->addr, 1360 machine->symbol_filter); 1361 } 1362 1363 if (symbol_conf.sym_list && 1364 (!al->sym || !strlist__has_entry(symbol_conf.sym_list, 1365 al->sym->name))) { 1366 al->filtered |= (1 << HIST_FILTER__SYMBOL); 1367 } 1368 1369 return 0; 1370 } 1371 1372 /* 1373 * The preprocess_sample method will return with reference counts for the 1374 * in it, when done using (and perhaps getting ref counts if needing to 1375 * keep a pointer to one of those entries) it must be paired with 1376 * addr_location__put(), so that the refcounts can be decremented. 1377 */ 1378 void addr_location__put(struct addr_location *al) 1379 { 1380 thread__zput(al->thread); 1381 } 1382 1383 bool is_bts_event(struct perf_event_attr *attr) 1384 { 1385 return attr->type == PERF_TYPE_HARDWARE && 1386 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && 1387 attr->sample_period == 1; 1388 } 1389 1390 bool sample_addr_correlates_sym(struct perf_event_attr *attr) 1391 { 1392 if (attr->type == PERF_TYPE_SOFTWARE && 1393 (attr->config == PERF_COUNT_SW_PAGE_FAULTS || 1394 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 1395 attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) 1396 return true; 1397 1398 if (is_bts_event(attr)) 1399 return true; 1400 1401 return false; 1402 } 1403 1404 void thread__resolve(struct thread *thread, struct addr_location *al, 1405 struct perf_sample *sample) 1406 { 1407 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->addr, al); 1408 if (!al->map) 1409 thread__find_addr_map(thread, sample->cpumode, MAP__VARIABLE, 1410 sample->addr, al); 1411 1412 al->cpu = sample->cpu; 1413 al->sym = NULL; 1414 1415 if (al->map) 1416 al->sym = map__find_symbol(al->map, al->addr, NULL); 1417 } 1418