1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <inttypes.h> 4 #include "string2.h" 5 #include <sys/param.h> 6 #include <sys/types.h> 7 #include <byteswap.h> 8 #include <unistd.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <linux/compiler.h> 12 #include <linux/list.h> 13 #include <linux/kernel.h> 14 #include <linux/bitops.h> 15 #include <linux/string.h> 16 #include <linux/stringify.h> 17 #include <linux/zalloc.h> 18 #include <sys/stat.h> 19 #include <sys/utsname.h> 20 #include <linux/time64.h> 21 #include <dirent.h> 22 #include <bpf/libbpf.h> 23 #include <perf/cpumap.h> 24 25 #include "dso.h" 26 #include "evlist.h" 27 #include "evsel.h" 28 #include "util/evsel_fprintf.h" 29 #include "header.h" 30 #include "memswap.h" 31 #include "trace-event.h" 32 #include "session.h" 33 #include "symbol.h" 34 #include "debug.h" 35 #include "cpumap.h" 36 #include "pmu.h" 37 #include "vdso.h" 38 #include "strbuf.h" 39 #include "build-id.h" 40 #include "data.h" 41 #include <api/fs/fs.h> 42 #include "asm/bug.h" 43 #include "tool.h" 44 #include "time-utils.h" 45 #include "units.h" 46 #include "util/util.h" // perf_exe() 47 #include "cputopo.h" 48 #include "bpf-event.h" 49 #include "clockid.h" 50 51 #include <linux/ctype.h> 52 #include <internal/lib.h> 53 54 /* 55 * magic2 = "PERFILE2" 56 * must be a numerical value to let the endianness 57 * determine the memory layout. That way we are able 58 * to detect endianness when reading the perf.data file 59 * back. 60 * 61 * we check for legacy (PERFFILE) format. 62 */ 63 static const char *__perf_magic1 = "PERFFILE"; 64 static const u64 __perf_magic2 = 0x32454c4946524550ULL; 65 static const u64 __perf_magic2_sw = 0x50455246494c4532ULL; 66 67 #define PERF_MAGIC __perf_magic2 68 69 const char perf_version_string[] = PERF_VERSION; 70 71 struct perf_file_attr { 72 struct perf_event_attr attr; 73 struct perf_file_section ids; 74 }; 75 76 void perf_header__set_feat(struct perf_header *header, int feat) 77 { 78 set_bit(feat, header->adds_features); 79 } 80 81 void perf_header__clear_feat(struct perf_header *header, int feat) 82 { 83 clear_bit(feat, header->adds_features); 84 } 85 86 bool perf_header__has_feat(const struct perf_header *header, int feat) 87 { 88 return test_bit(feat, header->adds_features); 89 } 90 91 static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size) 92 { 93 ssize_t ret = writen(ff->fd, buf, size); 94 95 if (ret != (ssize_t)size) 96 return ret < 0 ? (int)ret : -1; 97 return 0; 98 } 99 100 static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size) 101 { 102 /* struct perf_event_header::size is u16 */ 103 const size_t max_size = 0xffff - sizeof(struct perf_event_header); 104 size_t new_size = ff->size; 105 void *addr; 106 107 if (size + ff->offset > max_size) 108 return -E2BIG; 109 110 while (size > (new_size - ff->offset)) 111 new_size <<= 1; 112 new_size = min(max_size, new_size); 113 114 if (ff->size < new_size) { 115 addr = realloc(ff->buf, new_size); 116 if (!addr) 117 return -ENOMEM; 118 ff->buf = addr; 119 ff->size = new_size; 120 } 121 122 memcpy(ff->buf + ff->offset, buf, size); 123 ff->offset += size; 124 125 return 0; 126 } 127 128 /* Return: 0 if succeded, -ERR if failed. */ 129 int do_write(struct feat_fd *ff, const void *buf, size_t size) 130 { 131 if (!ff->buf) 132 return __do_write_fd(ff, buf, size); 133 return __do_write_buf(ff, buf, size); 134 } 135 136 /* Return: 0 if succeded, -ERR if failed. */ 137 static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size) 138 { 139 u64 *p = (u64 *) set; 140 int i, ret; 141 142 ret = do_write(ff, &size, sizeof(size)); 143 if (ret < 0) 144 return ret; 145 146 for (i = 0; (u64) i < BITS_TO_U64(size); i++) { 147 ret = do_write(ff, p + i, sizeof(*p)); 148 if (ret < 0) 149 return ret; 150 } 151 152 return 0; 153 } 154 155 /* Return: 0 if succeded, -ERR if failed. */ 156 int write_padded(struct feat_fd *ff, const void *bf, 157 size_t count, size_t count_aligned) 158 { 159 static const char zero_buf[NAME_ALIGN]; 160 int err = do_write(ff, bf, count); 161 162 if (!err) 163 err = do_write(ff, zero_buf, count_aligned - count); 164 165 return err; 166 } 167 168 #define string_size(str) \ 169 (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32)) 170 171 /* Return: 0 if succeded, -ERR if failed. */ 172 static int do_write_string(struct feat_fd *ff, const char *str) 173 { 174 u32 len, olen; 175 int ret; 176 177 olen = strlen(str) + 1; 178 len = PERF_ALIGN(olen, NAME_ALIGN); 179 180 /* write len, incl. \0 */ 181 ret = do_write(ff, &len, sizeof(len)); 182 if (ret < 0) 183 return ret; 184 185 return write_padded(ff, str, olen, len); 186 } 187 188 static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size) 189 { 190 ssize_t ret = readn(ff->fd, addr, size); 191 192 if (ret != size) 193 return ret < 0 ? (int)ret : -1; 194 return 0; 195 } 196 197 static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size) 198 { 199 if (size > (ssize_t)ff->size - ff->offset) 200 return -1; 201 202 memcpy(addr, ff->buf + ff->offset, size); 203 ff->offset += size; 204 205 return 0; 206 207 } 208 209 static int __do_read(struct feat_fd *ff, void *addr, ssize_t size) 210 { 211 if (!ff->buf) 212 return __do_read_fd(ff, addr, size); 213 return __do_read_buf(ff, addr, size); 214 } 215 216 static int do_read_u32(struct feat_fd *ff, u32 *addr) 217 { 218 int ret; 219 220 ret = __do_read(ff, addr, sizeof(*addr)); 221 if (ret) 222 return ret; 223 224 if (ff->ph->needs_swap) 225 *addr = bswap_32(*addr); 226 return 0; 227 } 228 229 static int do_read_u64(struct feat_fd *ff, u64 *addr) 230 { 231 int ret; 232 233 ret = __do_read(ff, addr, sizeof(*addr)); 234 if (ret) 235 return ret; 236 237 if (ff->ph->needs_swap) 238 *addr = bswap_64(*addr); 239 return 0; 240 } 241 242 static char *do_read_string(struct feat_fd *ff) 243 { 244 u32 len; 245 char *buf; 246 247 if (do_read_u32(ff, &len)) 248 return NULL; 249 250 buf = malloc(len); 251 if (!buf) 252 return NULL; 253 254 if (!__do_read(ff, buf, len)) { 255 /* 256 * strings are padded by zeroes 257 * thus the actual strlen of buf 258 * may be less than len 259 */ 260 return buf; 261 } 262 263 free(buf); 264 return NULL; 265 } 266 267 /* Return: 0 if succeded, -ERR if failed. */ 268 static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize) 269 { 270 unsigned long *set; 271 u64 size, *p; 272 int i, ret; 273 274 ret = do_read_u64(ff, &size); 275 if (ret) 276 return ret; 277 278 set = bitmap_alloc(size); 279 if (!set) 280 return -ENOMEM; 281 282 p = (u64 *) set; 283 284 for (i = 0; (u64) i < BITS_TO_U64(size); i++) { 285 ret = do_read_u64(ff, p + i); 286 if (ret < 0) { 287 free(set); 288 return ret; 289 } 290 } 291 292 *pset = set; 293 *psize = size; 294 return 0; 295 } 296 297 static int write_tracing_data(struct feat_fd *ff, 298 struct evlist *evlist) 299 { 300 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) 301 return -1; 302 303 return read_tracing_data(ff->fd, &evlist->core.entries); 304 } 305 306 static int write_build_id(struct feat_fd *ff, 307 struct evlist *evlist __maybe_unused) 308 { 309 struct perf_session *session; 310 int err; 311 312 session = container_of(ff->ph, struct perf_session, header); 313 314 if (!perf_session__read_build_ids(session, true)) 315 return -1; 316 317 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) 318 return -1; 319 320 err = perf_session__write_buildid_table(session, ff); 321 if (err < 0) { 322 pr_debug("failed to write buildid table\n"); 323 return err; 324 } 325 perf_session__cache_build_ids(session); 326 327 return 0; 328 } 329 330 static int write_hostname(struct feat_fd *ff, 331 struct evlist *evlist __maybe_unused) 332 { 333 struct utsname uts; 334 int ret; 335 336 ret = uname(&uts); 337 if (ret < 0) 338 return -1; 339 340 return do_write_string(ff, uts.nodename); 341 } 342 343 static int write_osrelease(struct feat_fd *ff, 344 struct evlist *evlist __maybe_unused) 345 { 346 struct utsname uts; 347 int ret; 348 349 ret = uname(&uts); 350 if (ret < 0) 351 return -1; 352 353 return do_write_string(ff, uts.release); 354 } 355 356 static int write_arch(struct feat_fd *ff, 357 struct evlist *evlist __maybe_unused) 358 { 359 struct utsname uts; 360 int ret; 361 362 ret = uname(&uts); 363 if (ret < 0) 364 return -1; 365 366 return do_write_string(ff, uts.machine); 367 } 368 369 static int write_version(struct feat_fd *ff, 370 struct evlist *evlist __maybe_unused) 371 { 372 return do_write_string(ff, perf_version_string); 373 } 374 375 static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc) 376 { 377 FILE *file; 378 char *buf = NULL; 379 char *s, *p; 380 const char *search = cpuinfo_proc; 381 size_t len = 0; 382 int ret = -1; 383 384 if (!search) 385 return -1; 386 387 file = fopen("/proc/cpuinfo", "r"); 388 if (!file) 389 return -1; 390 391 while (getline(&buf, &len, file) > 0) { 392 ret = strncmp(buf, search, strlen(search)); 393 if (!ret) 394 break; 395 } 396 397 if (ret) { 398 ret = -1; 399 goto done; 400 } 401 402 s = buf; 403 404 p = strchr(buf, ':'); 405 if (p && *(p+1) == ' ' && *(p+2)) 406 s = p + 2; 407 p = strchr(s, '\n'); 408 if (p) 409 *p = '\0'; 410 411 /* squash extra space characters (branding string) */ 412 p = s; 413 while (*p) { 414 if (isspace(*p)) { 415 char *r = p + 1; 416 char *q = skip_spaces(r); 417 *p = ' '; 418 if (q != (p+1)) 419 while ((*r++ = *q++)); 420 } 421 p++; 422 } 423 ret = do_write_string(ff, s); 424 done: 425 free(buf); 426 fclose(file); 427 return ret; 428 } 429 430 static int write_cpudesc(struct feat_fd *ff, 431 struct evlist *evlist __maybe_unused) 432 { 433 #if defined(__powerpc__) || defined(__hppa__) || defined(__sparc__) 434 #define CPUINFO_PROC { "cpu", } 435 #elif defined(__s390__) 436 #define CPUINFO_PROC { "vendor_id", } 437 #elif defined(__sh__) 438 #define CPUINFO_PROC { "cpu type", } 439 #elif defined(__alpha__) || defined(__mips__) 440 #define CPUINFO_PROC { "cpu model", } 441 #elif defined(__arm__) 442 #define CPUINFO_PROC { "model name", "Processor", } 443 #elif defined(__arc__) 444 #define CPUINFO_PROC { "Processor", } 445 #elif defined(__xtensa__) 446 #define CPUINFO_PROC { "core ID", } 447 #else 448 #define CPUINFO_PROC { "model name", } 449 #endif 450 const char *cpuinfo_procs[] = CPUINFO_PROC; 451 #undef CPUINFO_PROC 452 unsigned int i; 453 454 for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) { 455 int ret; 456 ret = __write_cpudesc(ff, cpuinfo_procs[i]); 457 if (ret >= 0) 458 return ret; 459 } 460 return -1; 461 } 462 463 464 static int write_nrcpus(struct feat_fd *ff, 465 struct evlist *evlist __maybe_unused) 466 { 467 long nr; 468 u32 nrc, nra; 469 int ret; 470 471 nrc = cpu__max_present_cpu(); 472 473 nr = sysconf(_SC_NPROCESSORS_ONLN); 474 if (nr < 0) 475 return -1; 476 477 nra = (u32)(nr & UINT_MAX); 478 479 ret = do_write(ff, &nrc, sizeof(nrc)); 480 if (ret < 0) 481 return ret; 482 483 return do_write(ff, &nra, sizeof(nra)); 484 } 485 486 static int write_event_desc(struct feat_fd *ff, 487 struct evlist *evlist) 488 { 489 struct evsel *evsel; 490 u32 nre, nri, sz; 491 int ret; 492 493 nre = evlist->core.nr_entries; 494 495 /* 496 * write number of events 497 */ 498 ret = do_write(ff, &nre, sizeof(nre)); 499 if (ret < 0) 500 return ret; 501 502 /* 503 * size of perf_event_attr struct 504 */ 505 sz = (u32)sizeof(evsel->core.attr); 506 ret = do_write(ff, &sz, sizeof(sz)); 507 if (ret < 0) 508 return ret; 509 510 evlist__for_each_entry(evlist, evsel) { 511 ret = do_write(ff, &evsel->core.attr, sz); 512 if (ret < 0) 513 return ret; 514 /* 515 * write number of unique id per event 516 * there is one id per instance of an event 517 * 518 * copy into an nri to be independent of the 519 * type of ids, 520 */ 521 nri = evsel->core.ids; 522 ret = do_write(ff, &nri, sizeof(nri)); 523 if (ret < 0) 524 return ret; 525 526 /* 527 * write event string as passed on cmdline 528 */ 529 ret = do_write_string(ff, evsel__name(evsel)); 530 if (ret < 0) 531 return ret; 532 /* 533 * write unique ids for this event 534 */ 535 ret = do_write(ff, evsel->core.id, evsel->core.ids * sizeof(u64)); 536 if (ret < 0) 537 return ret; 538 } 539 return 0; 540 } 541 542 static int write_cmdline(struct feat_fd *ff, 543 struct evlist *evlist __maybe_unused) 544 { 545 char pbuf[MAXPATHLEN], *buf; 546 int i, ret, n; 547 548 /* actual path to perf binary */ 549 buf = perf_exe(pbuf, MAXPATHLEN); 550 551 /* account for binary path */ 552 n = perf_env.nr_cmdline + 1; 553 554 ret = do_write(ff, &n, sizeof(n)); 555 if (ret < 0) 556 return ret; 557 558 ret = do_write_string(ff, buf); 559 if (ret < 0) 560 return ret; 561 562 for (i = 0 ; i < perf_env.nr_cmdline; i++) { 563 ret = do_write_string(ff, perf_env.cmdline_argv[i]); 564 if (ret < 0) 565 return ret; 566 } 567 return 0; 568 } 569 570 571 static int write_cpu_topology(struct feat_fd *ff, 572 struct evlist *evlist __maybe_unused) 573 { 574 struct cpu_topology *tp; 575 u32 i; 576 int ret, j; 577 578 tp = cpu_topology__new(); 579 if (!tp) 580 return -1; 581 582 ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib)); 583 if (ret < 0) 584 goto done; 585 586 for (i = 0; i < tp->core_sib; i++) { 587 ret = do_write_string(ff, tp->core_siblings[i]); 588 if (ret < 0) 589 goto done; 590 } 591 ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib)); 592 if (ret < 0) 593 goto done; 594 595 for (i = 0; i < tp->thread_sib; i++) { 596 ret = do_write_string(ff, tp->thread_siblings[i]); 597 if (ret < 0) 598 break; 599 } 600 601 ret = perf_env__read_cpu_topology_map(&perf_env); 602 if (ret < 0) 603 goto done; 604 605 for (j = 0; j < perf_env.nr_cpus_avail; j++) { 606 ret = do_write(ff, &perf_env.cpu[j].core_id, 607 sizeof(perf_env.cpu[j].core_id)); 608 if (ret < 0) 609 return ret; 610 ret = do_write(ff, &perf_env.cpu[j].socket_id, 611 sizeof(perf_env.cpu[j].socket_id)); 612 if (ret < 0) 613 return ret; 614 } 615 616 if (!tp->die_sib) 617 goto done; 618 619 ret = do_write(ff, &tp->die_sib, sizeof(tp->die_sib)); 620 if (ret < 0) 621 goto done; 622 623 for (i = 0; i < tp->die_sib; i++) { 624 ret = do_write_string(ff, tp->die_siblings[i]); 625 if (ret < 0) 626 goto done; 627 } 628 629 for (j = 0; j < perf_env.nr_cpus_avail; j++) { 630 ret = do_write(ff, &perf_env.cpu[j].die_id, 631 sizeof(perf_env.cpu[j].die_id)); 632 if (ret < 0) 633 return ret; 634 } 635 636 done: 637 cpu_topology__delete(tp); 638 return ret; 639 } 640 641 642 643 static int write_total_mem(struct feat_fd *ff, 644 struct evlist *evlist __maybe_unused) 645 { 646 char *buf = NULL; 647 FILE *fp; 648 size_t len = 0; 649 int ret = -1, n; 650 uint64_t mem; 651 652 fp = fopen("/proc/meminfo", "r"); 653 if (!fp) 654 return -1; 655 656 while (getline(&buf, &len, fp) > 0) { 657 ret = strncmp(buf, "MemTotal:", 9); 658 if (!ret) 659 break; 660 } 661 if (!ret) { 662 n = sscanf(buf, "%*s %"PRIu64, &mem); 663 if (n == 1) 664 ret = do_write(ff, &mem, sizeof(mem)); 665 } else 666 ret = -1; 667 free(buf); 668 fclose(fp); 669 return ret; 670 } 671 672 static int write_numa_topology(struct feat_fd *ff, 673 struct evlist *evlist __maybe_unused) 674 { 675 struct numa_topology *tp; 676 int ret = -1; 677 u32 i; 678 679 tp = numa_topology__new(); 680 if (!tp) 681 return -ENOMEM; 682 683 ret = do_write(ff, &tp->nr, sizeof(u32)); 684 if (ret < 0) 685 goto err; 686 687 for (i = 0; i < tp->nr; i++) { 688 struct numa_topology_node *n = &tp->nodes[i]; 689 690 ret = do_write(ff, &n->node, sizeof(u32)); 691 if (ret < 0) 692 goto err; 693 694 ret = do_write(ff, &n->mem_total, sizeof(u64)); 695 if (ret) 696 goto err; 697 698 ret = do_write(ff, &n->mem_free, sizeof(u64)); 699 if (ret) 700 goto err; 701 702 ret = do_write_string(ff, n->cpus); 703 if (ret < 0) 704 goto err; 705 } 706 707 ret = 0; 708 709 err: 710 numa_topology__delete(tp); 711 return ret; 712 } 713 714 /* 715 * File format: 716 * 717 * struct pmu_mappings { 718 * u32 pmu_num; 719 * struct pmu_map { 720 * u32 type; 721 * char name[]; 722 * }[pmu_num]; 723 * }; 724 */ 725 726 static int write_pmu_mappings(struct feat_fd *ff, 727 struct evlist *evlist __maybe_unused) 728 { 729 struct perf_pmu *pmu = NULL; 730 u32 pmu_num = 0; 731 int ret; 732 733 /* 734 * Do a first pass to count number of pmu to avoid lseek so this 735 * works in pipe mode as well. 736 */ 737 while ((pmu = perf_pmu__scan(pmu))) { 738 if (!pmu->name) 739 continue; 740 pmu_num++; 741 } 742 743 ret = do_write(ff, &pmu_num, sizeof(pmu_num)); 744 if (ret < 0) 745 return ret; 746 747 while ((pmu = perf_pmu__scan(pmu))) { 748 if (!pmu->name) 749 continue; 750 751 ret = do_write(ff, &pmu->type, sizeof(pmu->type)); 752 if (ret < 0) 753 return ret; 754 755 ret = do_write_string(ff, pmu->name); 756 if (ret < 0) 757 return ret; 758 } 759 760 return 0; 761 } 762 763 /* 764 * File format: 765 * 766 * struct group_descs { 767 * u32 nr_groups; 768 * struct group_desc { 769 * char name[]; 770 * u32 leader_idx; 771 * u32 nr_members; 772 * }[nr_groups]; 773 * }; 774 */ 775 static int write_group_desc(struct feat_fd *ff, 776 struct evlist *evlist) 777 { 778 u32 nr_groups = evlist->nr_groups; 779 struct evsel *evsel; 780 int ret; 781 782 ret = do_write(ff, &nr_groups, sizeof(nr_groups)); 783 if (ret < 0) 784 return ret; 785 786 evlist__for_each_entry(evlist, evsel) { 787 if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) { 788 const char *name = evsel->group_name ?: "{anon_group}"; 789 u32 leader_idx = evsel->idx; 790 u32 nr_members = evsel->core.nr_members; 791 792 ret = do_write_string(ff, name); 793 if (ret < 0) 794 return ret; 795 796 ret = do_write(ff, &leader_idx, sizeof(leader_idx)); 797 if (ret < 0) 798 return ret; 799 800 ret = do_write(ff, &nr_members, sizeof(nr_members)); 801 if (ret < 0) 802 return ret; 803 } 804 } 805 return 0; 806 } 807 808 /* 809 * Return the CPU id as a raw string. 810 * 811 * Each architecture should provide a more precise id string that 812 * can be use to match the architecture's "mapfile". 813 */ 814 char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused) 815 { 816 return NULL; 817 } 818 819 /* Return zero when the cpuid from the mapfile.csv matches the 820 * cpuid string generated on this platform. 821 * Otherwise return non-zero. 822 */ 823 int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid) 824 { 825 regex_t re; 826 regmatch_t pmatch[1]; 827 int match; 828 829 if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) { 830 /* Warn unable to generate match particular string. */ 831 pr_info("Invalid regular expression %s\n", mapcpuid); 832 return 1; 833 } 834 835 match = !regexec(&re, cpuid, 1, pmatch, 0); 836 regfree(&re); 837 if (match) { 838 size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so); 839 840 /* Verify the entire string matched. */ 841 if (match_len == strlen(cpuid)) 842 return 0; 843 } 844 return 1; 845 } 846 847 /* 848 * default get_cpuid(): nothing gets recorded 849 * actual implementation must be in arch/$(SRCARCH)/util/header.c 850 */ 851 int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused) 852 { 853 return ENOSYS; /* Not implemented */ 854 } 855 856 static int write_cpuid(struct feat_fd *ff, 857 struct evlist *evlist __maybe_unused) 858 { 859 char buffer[64]; 860 int ret; 861 862 ret = get_cpuid(buffer, sizeof(buffer)); 863 if (ret) 864 return -1; 865 866 return do_write_string(ff, buffer); 867 } 868 869 static int write_branch_stack(struct feat_fd *ff __maybe_unused, 870 struct evlist *evlist __maybe_unused) 871 { 872 return 0; 873 } 874 875 static int write_auxtrace(struct feat_fd *ff, 876 struct evlist *evlist __maybe_unused) 877 { 878 struct perf_session *session; 879 int err; 880 881 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) 882 return -1; 883 884 session = container_of(ff->ph, struct perf_session, header); 885 886 err = auxtrace_index__write(ff->fd, &session->auxtrace_index); 887 if (err < 0) 888 pr_err("Failed to write auxtrace index\n"); 889 return err; 890 } 891 892 static int write_clockid(struct feat_fd *ff, 893 struct evlist *evlist __maybe_unused) 894 { 895 return do_write(ff, &ff->ph->env.clock.clockid_res_ns, 896 sizeof(ff->ph->env.clock.clockid_res_ns)); 897 } 898 899 static int write_clock_data(struct feat_fd *ff, 900 struct evlist *evlist __maybe_unused) 901 { 902 u64 *data64; 903 u32 data32; 904 int ret; 905 906 /* version */ 907 data32 = 1; 908 909 ret = do_write(ff, &data32, sizeof(data32)); 910 if (ret < 0) 911 return ret; 912 913 /* clockid */ 914 data32 = ff->ph->env.clock.clockid; 915 916 ret = do_write(ff, &data32, sizeof(data32)); 917 if (ret < 0) 918 return ret; 919 920 /* TOD ref time */ 921 data64 = &ff->ph->env.clock.tod_ns; 922 923 ret = do_write(ff, data64, sizeof(*data64)); 924 if (ret < 0) 925 return ret; 926 927 /* clockid ref time */ 928 data64 = &ff->ph->env.clock.clockid_ns; 929 930 return do_write(ff, data64, sizeof(*data64)); 931 } 932 933 static int write_dir_format(struct feat_fd *ff, 934 struct evlist *evlist __maybe_unused) 935 { 936 struct perf_session *session; 937 struct perf_data *data; 938 939 session = container_of(ff->ph, struct perf_session, header); 940 data = session->data; 941 942 if (WARN_ON(!perf_data__is_dir(data))) 943 return -1; 944 945 return do_write(ff, &data->dir.version, sizeof(data->dir.version)); 946 } 947 948 #ifdef HAVE_LIBBPF_SUPPORT 949 static int write_bpf_prog_info(struct feat_fd *ff, 950 struct evlist *evlist __maybe_unused) 951 { 952 struct perf_env *env = &ff->ph->env; 953 struct rb_root *root; 954 struct rb_node *next; 955 int ret; 956 957 down_read(&env->bpf_progs.lock); 958 959 ret = do_write(ff, &env->bpf_progs.infos_cnt, 960 sizeof(env->bpf_progs.infos_cnt)); 961 if (ret < 0) 962 goto out; 963 964 root = &env->bpf_progs.infos; 965 next = rb_first(root); 966 while (next) { 967 struct bpf_prog_info_node *node; 968 size_t len; 969 970 node = rb_entry(next, struct bpf_prog_info_node, rb_node); 971 next = rb_next(&node->rb_node); 972 len = sizeof(struct bpf_prog_info_linear) + 973 node->info_linear->data_len; 974 975 /* before writing to file, translate address to offset */ 976 bpf_program__bpil_addr_to_offs(node->info_linear); 977 ret = do_write(ff, node->info_linear, len); 978 /* 979 * translate back to address even when do_write() fails, 980 * so that this function never changes the data. 981 */ 982 bpf_program__bpil_offs_to_addr(node->info_linear); 983 if (ret < 0) 984 goto out; 985 } 986 out: 987 up_read(&env->bpf_progs.lock); 988 return ret; 989 } 990 #else // HAVE_LIBBPF_SUPPORT 991 static int write_bpf_prog_info(struct feat_fd *ff __maybe_unused, 992 struct evlist *evlist __maybe_unused) 993 { 994 return 0; 995 } 996 #endif // HAVE_LIBBPF_SUPPORT 997 998 static int write_bpf_btf(struct feat_fd *ff, 999 struct evlist *evlist __maybe_unused) 1000 { 1001 struct perf_env *env = &ff->ph->env; 1002 struct rb_root *root; 1003 struct rb_node *next; 1004 int ret; 1005 1006 down_read(&env->bpf_progs.lock); 1007 1008 ret = do_write(ff, &env->bpf_progs.btfs_cnt, 1009 sizeof(env->bpf_progs.btfs_cnt)); 1010 1011 if (ret < 0) 1012 goto out; 1013 1014 root = &env->bpf_progs.btfs; 1015 next = rb_first(root); 1016 while (next) { 1017 struct btf_node *node; 1018 1019 node = rb_entry(next, struct btf_node, rb_node); 1020 next = rb_next(&node->rb_node); 1021 ret = do_write(ff, &node->id, 1022 sizeof(u32) * 2 + node->data_size); 1023 if (ret < 0) 1024 goto out; 1025 } 1026 out: 1027 up_read(&env->bpf_progs.lock); 1028 return ret; 1029 } 1030 1031 static int cpu_cache_level__sort(const void *a, const void *b) 1032 { 1033 struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a; 1034 struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b; 1035 1036 return cache_a->level - cache_b->level; 1037 } 1038 1039 static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b) 1040 { 1041 if (a->level != b->level) 1042 return false; 1043 1044 if (a->line_size != b->line_size) 1045 return false; 1046 1047 if (a->sets != b->sets) 1048 return false; 1049 1050 if (a->ways != b->ways) 1051 return false; 1052 1053 if (strcmp(a->type, b->type)) 1054 return false; 1055 1056 if (strcmp(a->size, b->size)) 1057 return false; 1058 1059 if (strcmp(a->map, b->map)) 1060 return false; 1061 1062 return true; 1063 } 1064 1065 static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level) 1066 { 1067 char path[PATH_MAX], file[PATH_MAX]; 1068 struct stat st; 1069 size_t len; 1070 1071 scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level); 1072 scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path); 1073 1074 if (stat(file, &st)) 1075 return 1; 1076 1077 scnprintf(file, PATH_MAX, "%s/level", path); 1078 if (sysfs__read_int(file, (int *) &cache->level)) 1079 return -1; 1080 1081 scnprintf(file, PATH_MAX, "%s/coherency_line_size", path); 1082 if (sysfs__read_int(file, (int *) &cache->line_size)) 1083 return -1; 1084 1085 scnprintf(file, PATH_MAX, "%s/number_of_sets", path); 1086 if (sysfs__read_int(file, (int *) &cache->sets)) 1087 return -1; 1088 1089 scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path); 1090 if (sysfs__read_int(file, (int *) &cache->ways)) 1091 return -1; 1092 1093 scnprintf(file, PATH_MAX, "%s/type", path); 1094 if (sysfs__read_str(file, &cache->type, &len)) 1095 return -1; 1096 1097 cache->type[len] = 0; 1098 cache->type = strim(cache->type); 1099 1100 scnprintf(file, PATH_MAX, "%s/size", path); 1101 if (sysfs__read_str(file, &cache->size, &len)) { 1102 zfree(&cache->type); 1103 return -1; 1104 } 1105 1106 cache->size[len] = 0; 1107 cache->size = strim(cache->size); 1108 1109 scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path); 1110 if (sysfs__read_str(file, &cache->map, &len)) { 1111 zfree(&cache->size); 1112 zfree(&cache->type); 1113 return -1; 1114 } 1115 1116 cache->map[len] = 0; 1117 cache->map = strim(cache->map); 1118 return 0; 1119 } 1120 1121 static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c) 1122 { 1123 fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map); 1124 } 1125 1126 #define MAX_CACHE_LVL 4 1127 1128 static int build_caches(struct cpu_cache_level caches[], u32 *cntp) 1129 { 1130 u32 i, cnt = 0; 1131 u32 nr, cpu; 1132 u16 level; 1133 1134 nr = cpu__max_cpu(); 1135 1136 for (cpu = 0; cpu < nr; cpu++) { 1137 for (level = 0; level < MAX_CACHE_LVL; level++) { 1138 struct cpu_cache_level c; 1139 int err; 1140 1141 err = cpu_cache_level__read(&c, cpu, level); 1142 if (err < 0) 1143 return err; 1144 1145 if (err == 1) 1146 break; 1147 1148 for (i = 0; i < cnt; i++) { 1149 if (cpu_cache_level__cmp(&c, &caches[i])) 1150 break; 1151 } 1152 1153 if (i == cnt) 1154 caches[cnt++] = c; 1155 else 1156 cpu_cache_level__free(&c); 1157 } 1158 } 1159 *cntp = cnt; 1160 return 0; 1161 } 1162 1163 static int write_cache(struct feat_fd *ff, 1164 struct evlist *evlist __maybe_unused) 1165 { 1166 u32 max_caches = cpu__max_cpu() * MAX_CACHE_LVL; 1167 struct cpu_cache_level caches[max_caches]; 1168 u32 cnt = 0, i, version = 1; 1169 int ret; 1170 1171 ret = build_caches(caches, &cnt); 1172 if (ret) 1173 goto out; 1174 1175 qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort); 1176 1177 ret = do_write(ff, &version, sizeof(u32)); 1178 if (ret < 0) 1179 goto out; 1180 1181 ret = do_write(ff, &cnt, sizeof(u32)); 1182 if (ret < 0) 1183 goto out; 1184 1185 for (i = 0; i < cnt; i++) { 1186 struct cpu_cache_level *c = &caches[i]; 1187 1188 #define _W(v) \ 1189 ret = do_write(ff, &c->v, sizeof(u32)); \ 1190 if (ret < 0) \ 1191 goto out; 1192 1193 _W(level) 1194 _W(line_size) 1195 _W(sets) 1196 _W(ways) 1197 #undef _W 1198 1199 #define _W(v) \ 1200 ret = do_write_string(ff, (const char *) c->v); \ 1201 if (ret < 0) \ 1202 goto out; 1203 1204 _W(type) 1205 _W(size) 1206 _W(map) 1207 #undef _W 1208 } 1209 1210 out: 1211 for (i = 0; i < cnt; i++) 1212 cpu_cache_level__free(&caches[i]); 1213 return ret; 1214 } 1215 1216 static int write_stat(struct feat_fd *ff __maybe_unused, 1217 struct evlist *evlist __maybe_unused) 1218 { 1219 return 0; 1220 } 1221 1222 static int write_sample_time(struct feat_fd *ff, 1223 struct evlist *evlist) 1224 { 1225 int ret; 1226 1227 ret = do_write(ff, &evlist->first_sample_time, 1228 sizeof(evlist->first_sample_time)); 1229 if (ret < 0) 1230 return ret; 1231 1232 return do_write(ff, &evlist->last_sample_time, 1233 sizeof(evlist->last_sample_time)); 1234 } 1235 1236 1237 static int memory_node__read(struct memory_node *n, unsigned long idx) 1238 { 1239 unsigned int phys, size = 0; 1240 char path[PATH_MAX]; 1241 struct dirent *ent; 1242 DIR *dir; 1243 1244 #define for_each_memory(mem, dir) \ 1245 while ((ent = readdir(dir))) \ 1246 if (strcmp(ent->d_name, ".") && \ 1247 strcmp(ent->d_name, "..") && \ 1248 sscanf(ent->d_name, "memory%u", &mem) == 1) 1249 1250 scnprintf(path, PATH_MAX, 1251 "%s/devices/system/node/node%lu", 1252 sysfs__mountpoint(), idx); 1253 1254 dir = opendir(path); 1255 if (!dir) { 1256 pr_warning("failed: cant' open memory sysfs data\n"); 1257 return -1; 1258 } 1259 1260 for_each_memory(phys, dir) { 1261 size = max(phys, size); 1262 } 1263 1264 size++; 1265 1266 n->set = bitmap_alloc(size); 1267 if (!n->set) { 1268 closedir(dir); 1269 return -ENOMEM; 1270 } 1271 1272 n->node = idx; 1273 n->size = size; 1274 1275 rewinddir(dir); 1276 1277 for_each_memory(phys, dir) { 1278 set_bit(phys, n->set); 1279 } 1280 1281 closedir(dir); 1282 return 0; 1283 } 1284 1285 static int memory_node__sort(const void *a, const void *b) 1286 { 1287 const struct memory_node *na = a; 1288 const struct memory_node *nb = b; 1289 1290 return na->node - nb->node; 1291 } 1292 1293 static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp) 1294 { 1295 char path[PATH_MAX]; 1296 struct dirent *ent; 1297 DIR *dir; 1298 u64 cnt = 0; 1299 int ret = 0; 1300 1301 scnprintf(path, PATH_MAX, "%s/devices/system/node/", 1302 sysfs__mountpoint()); 1303 1304 dir = opendir(path); 1305 if (!dir) { 1306 pr_debug2("%s: could't read %s, does this arch have topology information?\n", 1307 __func__, path); 1308 return -1; 1309 } 1310 1311 while (!ret && (ent = readdir(dir))) { 1312 unsigned int idx; 1313 int r; 1314 1315 if (!strcmp(ent->d_name, ".") || 1316 !strcmp(ent->d_name, "..")) 1317 continue; 1318 1319 r = sscanf(ent->d_name, "node%u", &idx); 1320 if (r != 1) 1321 continue; 1322 1323 if (WARN_ONCE(cnt >= size, 1324 "failed to write MEM_TOPOLOGY, way too many nodes\n")) { 1325 closedir(dir); 1326 return -1; 1327 } 1328 1329 ret = memory_node__read(&nodes[cnt++], idx); 1330 } 1331 1332 *cntp = cnt; 1333 closedir(dir); 1334 1335 if (!ret) 1336 qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort); 1337 1338 return ret; 1339 } 1340 1341 #define MAX_MEMORY_NODES 2000 1342 1343 /* 1344 * The MEM_TOPOLOGY holds physical memory map for every 1345 * node in system. The format of data is as follows: 1346 * 1347 * 0 - version | for future changes 1348 * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes 1349 * 16 - count | number of nodes 1350 * 1351 * For each node we store map of physical indexes for 1352 * each node: 1353 * 1354 * 32 - node id | node index 1355 * 40 - size | size of bitmap 1356 * 48 - bitmap | bitmap of memory indexes that belongs to node 1357 */ 1358 static int write_mem_topology(struct feat_fd *ff __maybe_unused, 1359 struct evlist *evlist __maybe_unused) 1360 { 1361 static struct memory_node nodes[MAX_MEMORY_NODES]; 1362 u64 bsize, version = 1, i, nr; 1363 int ret; 1364 1365 ret = sysfs__read_xll("devices/system/memory/block_size_bytes", 1366 (unsigned long long *) &bsize); 1367 if (ret) 1368 return ret; 1369 1370 ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr); 1371 if (ret) 1372 return ret; 1373 1374 ret = do_write(ff, &version, sizeof(version)); 1375 if (ret < 0) 1376 goto out; 1377 1378 ret = do_write(ff, &bsize, sizeof(bsize)); 1379 if (ret < 0) 1380 goto out; 1381 1382 ret = do_write(ff, &nr, sizeof(nr)); 1383 if (ret < 0) 1384 goto out; 1385 1386 for (i = 0; i < nr; i++) { 1387 struct memory_node *n = &nodes[i]; 1388 1389 #define _W(v) \ 1390 ret = do_write(ff, &n->v, sizeof(n->v)); \ 1391 if (ret < 0) \ 1392 goto out; 1393 1394 _W(node) 1395 _W(size) 1396 1397 #undef _W 1398 1399 ret = do_write_bitmap(ff, n->set, n->size); 1400 if (ret < 0) 1401 goto out; 1402 } 1403 1404 out: 1405 return ret; 1406 } 1407 1408 static int write_compressed(struct feat_fd *ff __maybe_unused, 1409 struct evlist *evlist __maybe_unused) 1410 { 1411 int ret; 1412 1413 ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver)); 1414 if (ret) 1415 return ret; 1416 1417 ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type)); 1418 if (ret) 1419 return ret; 1420 1421 ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level)); 1422 if (ret) 1423 return ret; 1424 1425 ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio)); 1426 if (ret) 1427 return ret; 1428 1429 return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len)); 1430 } 1431 1432 static int write_cpu_pmu_caps(struct feat_fd *ff, 1433 struct evlist *evlist __maybe_unused) 1434 { 1435 struct perf_pmu *cpu_pmu = perf_pmu__find("cpu"); 1436 struct perf_pmu_caps *caps = NULL; 1437 int nr_caps; 1438 int ret; 1439 1440 if (!cpu_pmu) 1441 return -ENOENT; 1442 1443 nr_caps = perf_pmu__caps_parse(cpu_pmu); 1444 if (nr_caps < 0) 1445 return nr_caps; 1446 1447 ret = do_write(ff, &nr_caps, sizeof(nr_caps)); 1448 if (ret < 0) 1449 return ret; 1450 1451 list_for_each_entry(caps, &cpu_pmu->caps, list) { 1452 ret = do_write_string(ff, caps->name); 1453 if (ret < 0) 1454 return ret; 1455 1456 ret = do_write_string(ff, caps->value); 1457 if (ret < 0) 1458 return ret; 1459 } 1460 1461 return ret; 1462 } 1463 1464 static void print_hostname(struct feat_fd *ff, FILE *fp) 1465 { 1466 fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname); 1467 } 1468 1469 static void print_osrelease(struct feat_fd *ff, FILE *fp) 1470 { 1471 fprintf(fp, "# os release : %s\n", ff->ph->env.os_release); 1472 } 1473 1474 static void print_arch(struct feat_fd *ff, FILE *fp) 1475 { 1476 fprintf(fp, "# arch : %s\n", ff->ph->env.arch); 1477 } 1478 1479 static void print_cpudesc(struct feat_fd *ff, FILE *fp) 1480 { 1481 fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc); 1482 } 1483 1484 static void print_nrcpus(struct feat_fd *ff, FILE *fp) 1485 { 1486 fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online); 1487 fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail); 1488 } 1489 1490 static void print_version(struct feat_fd *ff, FILE *fp) 1491 { 1492 fprintf(fp, "# perf version : %s\n", ff->ph->env.version); 1493 } 1494 1495 static void print_cmdline(struct feat_fd *ff, FILE *fp) 1496 { 1497 int nr, i; 1498 1499 nr = ff->ph->env.nr_cmdline; 1500 1501 fprintf(fp, "# cmdline : "); 1502 1503 for (i = 0; i < nr; i++) { 1504 char *argv_i = strdup(ff->ph->env.cmdline_argv[i]); 1505 if (!argv_i) { 1506 fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]); 1507 } else { 1508 char *mem = argv_i; 1509 do { 1510 char *quote = strchr(argv_i, '\''); 1511 if (!quote) 1512 break; 1513 *quote++ = '\0'; 1514 fprintf(fp, "%s\\\'", argv_i); 1515 argv_i = quote; 1516 } while (1); 1517 fprintf(fp, "%s ", argv_i); 1518 free(mem); 1519 } 1520 } 1521 fputc('\n', fp); 1522 } 1523 1524 static void print_cpu_topology(struct feat_fd *ff, FILE *fp) 1525 { 1526 struct perf_header *ph = ff->ph; 1527 int cpu_nr = ph->env.nr_cpus_avail; 1528 int nr, i; 1529 char *str; 1530 1531 nr = ph->env.nr_sibling_cores; 1532 str = ph->env.sibling_cores; 1533 1534 for (i = 0; i < nr; i++) { 1535 fprintf(fp, "# sibling sockets : %s\n", str); 1536 str += strlen(str) + 1; 1537 } 1538 1539 if (ph->env.nr_sibling_dies) { 1540 nr = ph->env.nr_sibling_dies; 1541 str = ph->env.sibling_dies; 1542 1543 for (i = 0; i < nr; i++) { 1544 fprintf(fp, "# sibling dies : %s\n", str); 1545 str += strlen(str) + 1; 1546 } 1547 } 1548 1549 nr = ph->env.nr_sibling_threads; 1550 str = ph->env.sibling_threads; 1551 1552 for (i = 0; i < nr; i++) { 1553 fprintf(fp, "# sibling threads : %s\n", str); 1554 str += strlen(str) + 1; 1555 } 1556 1557 if (ph->env.nr_sibling_dies) { 1558 if (ph->env.cpu != NULL) { 1559 for (i = 0; i < cpu_nr; i++) 1560 fprintf(fp, "# CPU %d: Core ID %d, " 1561 "Die ID %d, Socket ID %d\n", 1562 i, ph->env.cpu[i].core_id, 1563 ph->env.cpu[i].die_id, 1564 ph->env.cpu[i].socket_id); 1565 } else 1566 fprintf(fp, "# Core ID, Die ID and Socket ID " 1567 "information is not available\n"); 1568 } else { 1569 if (ph->env.cpu != NULL) { 1570 for (i = 0; i < cpu_nr; i++) 1571 fprintf(fp, "# CPU %d: Core ID %d, " 1572 "Socket ID %d\n", 1573 i, ph->env.cpu[i].core_id, 1574 ph->env.cpu[i].socket_id); 1575 } else 1576 fprintf(fp, "# Core ID and Socket ID " 1577 "information is not available\n"); 1578 } 1579 } 1580 1581 static void print_clockid(struct feat_fd *ff, FILE *fp) 1582 { 1583 fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n", 1584 ff->ph->env.clock.clockid_res_ns * 1000); 1585 } 1586 1587 static void print_clock_data(struct feat_fd *ff, FILE *fp) 1588 { 1589 struct timespec clockid_ns; 1590 char tstr[64], date[64]; 1591 struct timeval tod_ns; 1592 clockid_t clockid; 1593 struct tm ltime; 1594 u64 ref; 1595 1596 if (!ff->ph->env.clock.enabled) { 1597 fprintf(fp, "# reference time disabled\n"); 1598 return; 1599 } 1600 1601 /* Compute TOD time. */ 1602 ref = ff->ph->env.clock.tod_ns; 1603 tod_ns.tv_sec = ref / NSEC_PER_SEC; 1604 ref -= tod_ns.tv_sec * NSEC_PER_SEC; 1605 tod_ns.tv_usec = ref / NSEC_PER_USEC; 1606 1607 /* Compute clockid time. */ 1608 ref = ff->ph->env.clock.clockid_ns; 1609 clockid_ns.tv_sec = ref / NSEC_PER_SEC; 1610 ref -= clockid_ns.tv_sec * NSEC_PER_SEC; 1611 clockid_ns.tv_nsec = ref; 1612 1613 clockid = ff->ph->env.clock.clockid; 1614 1615 if (localtime_r(&tod_ns.tv_sec, <ime) == NULL) 1616 snprintf(tstr, sizeof(tstr), "<error>"); 1617 else { 1618 strftime(date, sizeof(date), "%F %T", <ime); 1619 scnprintf(tstr, sizeof(tstr), "%s.%06d", 1620 date, (int) tod_ns.tv_usec); 1621 } 1622 1623 fprintf(fp, "# clockid: %s (%u)\n", clockid_name(clockid), clockid); 1624 fprintf(fp, "# reference time: %s = %ld.%06d (TOD) = %ld.%09ld (%s)\n", 1625 tstr, tod_ns.tv_sec, (int) tod_ns.tv_usec, 1626 clockid_ns.tv_sec, clockid_ns.tv_nsec, 1627 clockid_name(clockid)); 1628 } 1629 1630 static void print_dir_format(struct feat_fd *ff, FILE *fp) 1631 { 1632 struct perf_session *session; 1633 struct perf_data *data; 1634 1635 session = container_of(ff->ph, struct perf_session, header); 1636 data = session->data; 1637 1638 fprintf(fp, "# directory data version : %"PRIu64"\n", data->dir.version); 1639 } 1640 1641 static void print_bpf_prog_info(struct feat_fd *ff, FILE *fp) 1642 { 1643 struct perf_env *env = &ff->ph->env; 1644 struct rb_root *root; 1645 struct rb_node *next; 1646 1647 down_read(&env->bpf_progs.lock); 1648 1649 root = &env->bpf_progs.infos; 1650 next = rb_first(root); 1651 1652 while (next) { 1653 struct bpf_prog_info_node *node; 1654 1655 node = rb_entry(next, struct bpf_prog_info_node, rb_node); 1656 next = rb_next(&node->rb_node); 1657 1658 bpf_event__print_bpf_prog_info(&node->info_linear->info, 1659 env, fp); 1660 } 1661 1662 up_read(&env->bpf_progs.lock); 1663 } 1664 1665 static void print_bpf_btf(struct feat_fd *ff, FILE *fp) 1666 { 1667 struct perf_env *env = &ff->ph->env; 1668 struct rb_root *root; 1669 struct rb_node *next; 1670 1671 down_read(&env->bpf_progs.lock); 1672 1673 root = &env->bpf_progs.btfs; 1674 next = rb_first(root); 1675 1676 while (next) { 1677 struct btf_node *node; 1678 1679 node = rb_entry(next, struct btf_node, rb_node); 1680 next = rb_next(&node->rb_node); 1681 fprintf(fp, "# btf info of id %u\n", node->id); 1682 } 1683 1684 up_read(&env->bpf_progs.lock); 1685 } 1686 1687 static void free_event_desc(struct evsel *events) 1688 { 1689 struct evsel *evsel; 1690 1691 if (!events) 1692 return; 1693 1694 for (evsel = events; evsel->core.attr.size; evsel++) { 1695 zfree(&evsel->name); 1696 zfree(&evsel->core.id); 1697 } 1698 1699 free(events); 1700 } 1701 1702 static bool perf_attr_check(struct perf_event_attr *attr) 1703 { 1704 if (attr->__reserved_1 || attr->__reserved_2 || attr->__reserved_3) { 1705 pr_warning("Reserved bits are set unexpectedly. " 1706 "Please update perf tool.\n"); 1707 return false; 1708 } 1709 1710 if (attr->sample_type & ~(PERF_SAMPLE_MAX-1)) { 1711 pr_warning("Unknown sample type (0x%llx) is detected. " 1712 "Please update perf tool.\n", 1713 attr->sample_type); 1714 return false; 1715 } 1716 1717 if (attr->read_format & ~(PERF_FORMAT_MAX-1)) { 1718 pr_warning("Unknown read format (0x%llx) is detected. " 1719 "Please update perf tool.\n", 1720 attr->read_format); 1721 return false; 1722 } 1723 1724 if ((attr->sample_type & PERF_SAMPLE_BRANCH_STACK) && 1725 (attr->branch_sample_type & ~(PERF_SAMPLE_BRANCH_MAX-1))) { 1726 pr_warning("Unknown branch sample type (0x%llx) is detected. " 1727 "Please update perf tool.\n", 1728 attr->branch_sample_type); 1729 1730 return false; 1731 } 1732 1733 return true; 1734 } 1735 1736 static struct evsel *read_event_desc(struct feat_fd *ff) 1737 { 1738 struct evsel *evsel, *events = NULL; 1739 u64 *id; 1740 void *buf = NULL; 1741 u32 nre, sz, nr, i, j; 1742 size_t msz; 1743 1744 /* number of events */ 1745 if (do_read_u32(ff, &nre)) 1746 goto error; 1747 1748 if (do_read_u32(ff, &sz)) 1749 goto error; 1750 1751 /* buffer to hold on file attr struct */ 1752 buf = malloc(sz); 1753 if (!buf) 1754 goto error; 1755 1756 /* the last event terminates with evsel->core.attr.size == 0: */ 1757 events = calloc(nre + 1, sizeof(*events)); 1758 if (!events) 1759 goto error; 1760 1761 msz = sizeof(evsel->core.attr); 1762 if (sz < msz) 1763 msz = sz; 1764 1765 for (i = 0, evsel = events; i < nre; evsel++, i++) { 1766 evsel->idx = i; 1767 1768 /* 1769 * must read entire on-file attr struct to 1770 * sync up with layout. 1771 */ 1772 if (__do_read(ff, buf, sz)) 1773 goto error; 1774 1775 if (ff->ph->needs_swap) 1776 perf_event__attr_swap(buf); 1777 1778 memcpy(&evsel->core.attr, buf, msz); 1779 1780 if (!perf_attr_check(&evsel->core.attr)) 1781 goto error; 1782 1783 if (do_read_u32(ff, &nr)) 1784 goto error; 1785 1786 if (ff->ph->needs_swap) 1787 evsel->needs_swap = true; 1788 1789 evsel->name = do_read_string(ff); 1790 if (!evsel->name) 1791 goto error; 1792 1793 if (!nr) 1794 continue; 1795 1796 id = calloc(nr, sizeof(*id)); 1797 if (!id) 1798 goto error; 1799 evsel->core.ids = nr; 1800 evsel->core.id = id; 1801 1802 for (j = 0 ; j < nr; j++) { 1803 if (do_read_u64(ff, id)) 1804 goto error; 1805 id++; 1806 } 1807 } 1808 out: 1809 free(buf); 1810 return events; 1811 error: 1812 free_event_desc(events); 1813 events = NULL; 1814 goto out; 1815 } 1816 1817 static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val, 1818 void *priv __maybe_unused) 1819 { 1820 return fprintf(fp, ", %s = %s", name, val); 1821 } 1822 1823 static void print_event_desc(struct feat_fd *ff, FILE *fp) 1824 { 1825 struct evsel *evsel, *events; 1826 u32 j; 1827 u64 *id; 1828 1829 if (ff->events) 1830 events = ff->events; 1831 else 1832 events = read_event_desc(ff); 1833 1834 if (!events) { 1835 fprintf(fp, "# event desc: not available or unable to read\n"); 1836 return; 1837 } 1838 1839 for (evsel = events; evsel->core.attr.size; evsel++) { 1840 fprintf(fp, "# event : name = %s, ", evsel->name); 1841 1842 if (evsel->core.ids) { 1843 fprintf(fp, ", id = {"); 1844 for (j = 0, id = evsel->core.id; j < evsel->core.ids; j++, id++) { 1845 if (j) 1846 fputc(',', fp); 1847 fprintf(fp, " %"PRIu64, *id); 1848 } 1849 fprintf(fp, " }"); 1850 } 1851 1852 perf_event_attr__fprintf(fp, &evsel->core.attr, __desc_attr__fprintf, NULL); 1853 1854 fputc('\n', fp); 1855 } 1856 1857 free_event_desc(events); 1858 ff->events = NULL; 1859 } 1860 1861 static void print_total_mem(struct feat_fd *ff, FILE *fp) 1862 { 1863 fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem); 1864 } 1865 1866 static void print_numa_topology(struct feat_fd *ff, FILE *fp) 1867 { 1868 int i; 1869 struct numa_node *n; 1870 1871 for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) { 1872 n = &ff->ph->env.numa_nodes[i]; 1873 1874 fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB," 1875 " free = %"PRIu64" kB\n", 1876 n->node, n->mem_total, n->mem_free); 1877 1878 fprintf(fp, "# node%u cpu list : ", n->node); 1879 cpu_map__fprintf(n->map, fp); 1880 } 1881 } 1882 1883 static void print_cpuid(struct feat_fd *ff, FILE *fp) 1884 { 1885 fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid); 1886 } 1887 1888 static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp) 1889 { 1890 fprintf(fp, "# contains samples with branch stack\n"); 1891 } 1892 1893 static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp) 1894 { 1895 fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n"); 1896 } 1897 1898 static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp) 1899 { 1900 fprintf(fp, "# contains stat data\n"); 1901 } 1902 1903 static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused) 1904 { 1905 int i; 1906 1907 fprintf(fp, "# CPU cache info:\n"); 1908 for (i = 0; i < ff->ph->env.caches_cnt; i++) { 1909 fprintf(fp, "# "); 1910 cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]); 1911 } 1912 } 1913 1914 static void print_compressed(struct feat_fd *ff, FILE *fp) 1915 { 1916 fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n", 1917 ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown", 1918 ff->ph->env.comp_level, ff->ph->env.comp_ratio); 1919 } 1920 1921 static void print_cpu_pmu_caps(struct feat_fd *ff, FILE *fp) 1922 { 1923 const char *delimiter = "# cpu pmu capabilities: "; 1924 u32 nr_caps = ff->ph->env.nr_cpu_pmu_caps; 1925 char *str; 1926 1927 if (!nr_caps) { 1928 fprintf(fp, "# cpu pmu capabilities: not available\n"); 1929 return; 1930 } 1931 1932 str = ff->ph->env.cpu_pmu_caps; 1933 while (nr_caps--) { 1934 fprintf(fp, "%s%s", delimiter, str); 1935 delimiter = ", "; 1936 str += strlen(str) + 1; 1937 } 1938 1939 fprintf(fp, "\n"); 1940 } 1941 1942 static void print_pmu_mappings(struct feat_fd *ff, FILE *fp) 1943 { 1944 const char *delimiter = "# pmu mappings: "; 1945 char *str, *tmp; 1946 u32 pmu_num; 1947 u32 type; 1948 1949 pmu_num = ff->ph->env.nr_pmu_mappings; 1950 if (!pmu_num) { 1951 fprintf(fp, "# pmu mappings: not available\n"); 1952 return; 1953 } 1954 1955 str = ff->ph->env.pmu_mappings; 1956 1957 while (pmu_num) { 1958 type = strtoul(str, &tmp, 0); 1959 if (*tmp != ':') 1960 goto error; 1961 1962 str = tmp + 1; 1963 fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type); 1964 1965 delimiter = ", "; 1966 str += strlen(str) + 1; 1967 pmu_num--; 1968 } 1969 1970 fprintf(fp, "\n"); 1971 1972 if (!pmu_num) 1973 return; 1974 error: 1975 fprintf(fp, "# pmu mappings: unable to read\n"); 1976 } 1977 1978 static void print_group_desc(struct feat_fd *ff, FILE *fp) 1979 { 1980 struct perf_session *session; 1981 struct evsel *evsel; 1982 u32 nr = 0; 1983 1984 session = container_of(ff->ph, struct perf_session, header); 1985 1986 evlist__for_each_entry(session->evlist, evsel) { 1987 if (evsel__is_group_leader(evsel) && evsel->core.nr_members > 1) { 1988 fprintf(fp, "# group: %s{%s", evsel->group_name ?: "", evsel__name(evsel)); 1989 1990 nr = evsel->core.nr_members - 1; 1991 } else if (nr) { 1992 fprintf(fp, ",%s", evsel__name(evsel)); 1993 1994 if (--nr == 0) 1995 fprintf(fp, "}\n"); 1996 } 1997 } 1998 } 1999 2000 static void print_sample_time(struct feat_fd *ff, FILE *fp) 2001 { 2002 struct perf_session *session; 2003 char time_buf[32]; 2004 double d; 2005 2006 session = container_of(ff->ph, struct perf_session, header); 2007 2008 timestamp__scnprintf_usec(session->evlist->first_sample_time, 2009 time_buf, sizeof(time_buf)); 2010 fprintf(fp, "# time of first sample : %s\n", time_buf); 2011 2012 timestamp__scnprintf_usec(session->evlist->last_sample_time, 2013 time_buf, sizeof(time_buf)); 2014 fprintf(fp, "# time of last sample : %s\n", time_buf); 2015 2016 d = (double)(session->evlist->last_sample_time - 2017 session->evlist->first_sample_time) / NSEC_PER_MSEC; 2018 2019 fprintf(fp, "# sample duration : %10.3f ms\n", d); 2020 } 2021 2022 static void memory_node__fprintf(struct memory_node *n, 2023 unsigned long long bsize, FILE *fp) 2024 { 2025 char buf_map[100], buf_size[50]; 2026 unsigned long long size; 2027 2028 size = bsize * bitmap_weight(n->set, n->size); 2029 unit_number__scnprintf(buf_size, 50, size); 2030 2031 bitmap_scnprintf(n->set, n->size, buf_map, 100); 2032 fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map); 2033 } 2034 2035 static void print_mem_topology(struct feat_fd *ff, FILE *fp) 2036 { 2037 struct memory_node *nodes; 2038 int i, nr; 2039 2040 nodes = ff->ph->env.memory_nodes; 2041 nr = ff->ph->env.nr_memory_nodes; 2042 2043 fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n", 2044 nr, ff->ph->env.memory_bsize); 2045 2046 for (i = 0; i < nr; i++) { 2047 memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp); 2048 } 2049 } 2050 2051 static int __event_process_build_id(struct perf_record_header_build_id *bev, 2052 char *filename, 2053 struct perf_session *session) 2054 { 2055 int err = -1; 2056 struct machine *machine; 2057 u16 cpumode; 2058 struct dso *dso; 2059 enum dso_space_type dso_space; 2060 2061 machine = perf_session__findnew_machine(session, bev->pid); 2062 if (!machine) 2063 goto out; 2064 2065 cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 2066 2067 switch (cpumode) { 2068 case PERF_RECORD_MISC_KERNEL: 2069 dso_space = DSO_SPACE__KERNEL; 2070 break; 2071 case PERF_RECORD_MISC_GUEST_KERNEL: 2072 dso_space = DSO_SPACE__KERNEL_GUEST; 2073 break; 2074 case PERF_RECORD_MISC_USER: 2075 case PERF_RECORD_MISC_GUEST_USER: 2076 dso_space = DSO_SPACE__USER; 2077 break; 2078 default: 2079 goto out; 2080 } 2081 2082 dso = machine__findnew_dso(machine, filename); 2083 if (dso != NULL) { 2084 char sbuild_id[SBUILD_ID_SIZE]; 2085 2086 dso__set_build_id(dso, &bev->build_id); 2087 2088 if (dso_space != DSO_SPACE__USER) { 2089 struct kmod_path m = { .name = NULL, }; 2090 2091 if (!kmod_path__parse_name(&m, filename) && m.kmod) 2092 dso__set_module_info(dso, &m, machine); 2093 2094 dso->kernel = dso_space; 2095 free(m.name); 2096 } 2097 2098 build_id__sprintf(dso->build_id, sizeof(dso->build_id), 2099 sbuild_id); 2100 pr_debug("build id event received for %s: %s\n", 2101 dso->long_name, sbuild_id); 2102 dso__put(dso); 2103 } 2104 2105 err = 0; 2106 out: 2107 return err; 2108 } 2109 2110 static int perf_header__read_build_ids_abi_quirk(struct perf_header *header, 2111 int input, u64 offset, u64 size) 2112 { 2113 struct perf_session *session = container_of(header, struct perf_session, header); 2114 struct { 2115 struct perf_event_header header; 2116 u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))]; 2117 char filename[0]; 2118 } old_bev; 2119 struct perf_record_header_build_id bev; 2120 char filename[PATH_MAX]; 2121 u64 limit = offset + size; 2122 2123 while (offset < limit) { 2124 ssize_t len; 2125 2126 if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev)) 2127 return -1; 2128 2129 if (header->needs_swap) 2130 perf_event_header__bswap(&old_bev.header); 2131 2132 len = old_bev.header.size - sizeof(old_bev); 2133 if (readn(input, filename, len) != len) 2134 return -1; 2135 2136 bev.header = old_bev.header; 2137 2138 /* 2139 * As the pid is the missing value, we need to fill 2140 * it properly. The header.misc value give us nice hint. 2141 */ 2142 bev.pid = HOST_KERNEL_ID; 2143 if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER || 2144 bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL) 2145 bev.pid = DEFAULT_GUEST_KERNEL_ID; 2146 2147 memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id)); 2148 __event_process_build_id(&bev, filename, session); 2149 2150 offset += bev.header.size; 2151 } 2152 2153 return 0; 2154 } 2155 2156 static int perf_header__read_build_ids(struct perf_header *header, 2157 int input, u64 offset, u64 size) 2158 { 2159 struct perf_session *session = container_of(header, struct perf_session, header); 2160 struct perf_record_header_build_id bev; 2161 char filename[PATH_MAX]; 2162 u64 limit = offset + size, orig_offset = offset; 2163 int err = -1; 2164 2165 while (offset < limit) { 2166 ssize_t len; 2167 2168 if (readn(input, &bev, sizeof(bev)) != sizeof(bev)) 2169 goto out; 2170 2171 if (header->needs_swap) 2172 perf_event_header__bswap(&bev.header); 2173 2174 len = bev.header.size - sizeof(bev); 2175 if (readn(input, filename, len) != len) 2176 goto out; 2177 /* 2178 * The a1645ce1 changeset: 2179 * 2180 * "perf: 'perf kvm' tool for monitoring guest performance from host" 2181 * 2182 * Added a field to struct perf_record_header_build_id that broke the file 2183 * format. 2184 * 2185 * Since the kernel build-id is the first entry, process the 2186 * table using the old format if the well known 2187 * '[kernel.kallsyms]' string for the kernel build-id has the 2188 * first 4 characters chopped off (where the pid_t sits). 2189 */ 2190 if (memcmp(filename, "nel.kallsyms]", 13) == 0) { 2191 if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1) 2192 return -1; 2193 return perf_header__read_build_ids_abi_quirk(header, input, offset, size); 2194 } 2195 2196 __event_process_build_id(&bev, filename, session); 2197 2198 offset += bev.header.size; 2199 } 2200 err = 0; 2201 out: 2202 return err; 2203 } 2204 2205 /* Macro for features that simply need to read and store a string. */ 2206 #define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \ 2207 static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \ 2208 {\ 2209 ff->ph->env.__feat_env = do_read_string(ff); \ 2210 return ff->ph->env.__feat_env ? 0 : -ENOMEM; \ 2211 } 2212 2213 FEAT_PROCESS_STR_FUN(hostname, hostname); 2214 FEAT_PROCESS_STR_FUN(osrelease, os_release); 2215 FEAT_PROCESS_STR_FUN(version, version); 2216 FEAT_PROCESS_STR_FUN(arch, arch); 2217 FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc); 2218 FEAT_PROCESS_STR_FUN(cpuid, cpuid); 2219 2220 static int process_tracing_data(struct feat_fd *ff, void *data) 2221 { 2222 ssize_t ret = trace_report(ff->fd, data, false); 2223 2224 return ret < 0 ? -1 : 0; 2225 } 2226 2227 static int process_build_id(struct feat_fd *ff, void *data __maybe_unused) 2228 { 2229 if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size)) 2230 pr_debug("Failed to read buildids, continuing...\n"); 2231 return 0; 2232 } 2233 2234 static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused) 2235 { 2236 int ret; 2237 u32 nr_cpus_avail, nr_cpus_online; 2238 2239 ret = do_read_u32(ff, &nr_cpus_avail); 2240 if (ret) 2241 return ret; 2242 2243 ret = do_read_u32(ff, &nr_cpus_online); 2244 if (ret) 2245 return ret; 2246 ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail; 2247 ff->ph->env.nr_cpus_online = (int)nr_cpus_online; 2248 return 0; 2249 } 2250 2251 static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused) 2252 { 2253 u64 total_mem; 2254 int ret; 2255 2256 ret = do_read_u64(ff, &total_mem); 2257 if (ret) 2258 return -1; 2259 ff->ph->env.total_mem = (unsigned long long)total_mem; 2260 return 0; 2261 } 2262 2263 static struct evsel * 2264 perf_evlist__find_by_index(struct evlist *evlist, int idx) 2265 { 2266 struct evsel *evsel; 2267 2268 evlist__for_each_entry(evlist, evsel) { 2269 if (evsel->idx == idx) 2270 return evsel; 2271 } 2272 2273 return NULL; 2274 } 2275 2276 static void 2277 perf_evlist__set_event_name(struct evlist *evlist, 2278 struct evsel *event) 2279 { 2280 struct evsel *evsel; 2281 2282 if (!event->name) 2283 return; 2284 2285 evsel = perf_evlist__find_by_index(evlist, event->idx); 2286 if (!evsel) 2287 return; 2288 2289 if (evsel->name) 2290 return; 2291 2292 evsel->name = strdup(event->name); 2293 } 2294 2295 static int 2296 process_event_desc(struct feat_fd *ff, void *data __maybe_unused) 2297 { 2298 struct perf_session *session; 2299 struct evsel *evsel, *events = read_event_desc(ff); 2300 2301 if (!events) 2302 return 0; 2303 2304 session = container_of(ff->ph, struct perf_session, header); 2305 2306 if (session->data->is_pipe) { 2307 /* Save events for reading later by print_event_desc, 2308 * since they can't be read again in pipe mode. */ 2309 ff->events = events; 2310 } 2311 2312 for (evsel = events; evsel->core.attr.size; evsel++) 2313 perf_evlist__set_event_name(session->evlist, evsel); 2314 2315 if (!session->data->is_pipe) 2316 free_event_desc(events); 2317 2318 return 0; 2319 } 2320 2321 static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused) 2322 { 2323 char *str, *cmdline = NULL, **argv = NULL; 2324 u32 nr, i, len = 0; 2325 2326 if (do_read_u32(ff, &nr)) 2327 return -1; 2328 2329 ff->ph->env.nr_cmdline = nr; 2330 2331 cmdline = zalloc(ff->size + nr + 1); 2332 if (!cmdline) 2333 return -1; 2334 2335 argv = zalloc(sizeof(char *) * (nr + 1)); 2336 if (!argv) 2337 goto error; 2338 2339 for (i = 0; i < nr; i++) { 2340 str = do_read_string(ff); 2341 if (!str) 2342 goto error; 2343 2344 argv[i] = cmdline + len; 2345 memcpy(argv[i], str, strlen(str) + 1); 2346 len += strlen(str) + 1; 2347 free(str); 2348 } 2349 ff->ph->env.cmdline = cmdline; 2350 ff->ph->env.cmdline_argv = (const char **) argv; 2351 return 0; 2352 2353 error: 2354 free(argv); 2355 free(cmdline); 2356 return -1; 2357 } 2358 2359 static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused) 2360 { 2361 u32 nr, i; 2362 char *str; 2363 struct strbuf sb; 2364 int cpu_nr = ff->ph->env.nr_cpus_avail; 2365 u64 size = 0; 2366 struct perf_header *ph = ff->ph; 2367 bool do_core_id_test = true; 2368 2369 ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu)); 2370 if (!ph->env.cpu) 2371 return -1; 2372 2373 if (do_read_u32(ff, &nr)) 2374 goto free_cpu; 2375 2376 ph->env.nr_sibling_cores = nr; 2377 size += sizeof(u32); 2378 if (strbuf_init(&sb, 128) < 0) 2379 goto free_cpu; 2380 2381 for (i = 0; i < nr; i++) { 2382 str = do_read_string(ff); 2383 if (!str) 2384 goto error; 2385 2386 /* include a NULL character at the end */ 2387 if (strbuf_add(&sb, str, strlen(str) + 1) < 0) 2388 goto error; 2389 size += string_size(str); 2390 free(str); 2391 } 2392 ph->env.sibling_cores = strbuf_detach(&sb, NULL); 2393 2394 if (do_read_u32(ff, &nr)) 2395 return -1; 2396 2397 ph->env.nr_sibling_threads = nr; 2398 size += sizeof(u32); 2399 2400 for (i = 0; i < nr; i++) { 2401 str = do_read_string(ff); 2402 if (!str) 2403 goto error; 2404 2405 /* include a NULL character at the end */ 2406 if (strbuf_add(&sb, str, strlen(str) + 1) < 0) 2407 goto error; 2408 size += string_size(str); 2409 free(str); 2410 } 2411 ph->env.sibling_threads = strbuf_detach(&sb, NULL); 2412 2413 /* 2414 * The header may be from old perf, 2415 * which doesn't include core id and socket id information. 2416 */ 2417 if (ff->size <= size) { 2418 zfree(&ph->env.cpu); 2419 return 0; 2420 } 2421 2422 /* On s390 the socket_id number is not related to the numbers of cpus. 2423 * The socket_id number might be higher than the numbers of cpus. 2424 * This depends on the configuration. 2425 * AArch64 is the same. 2426 */ 2427 if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4) 2428 || !strncmp(ph->env.arch, "aarch64", 7))) 2429 do_core_id_test = false; 2430 2431 for (i = 0; i < (u32)cpu_nr; i++) { 2432 if (do_read_u32(ff, &nr)) 2433 goto free_cpu; 2434 2435 ph->env.cpu[i].core_id = nr; 2436 size += sizeof(u32); 2437 2438 if (do_read_u32(ff, &nr)) 2439 goto free_cpu; 2440 2441 if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) { 2442 pr_debug("socket_id number is too big." 2443 "You may need to upgrade the perf tool.\n"); 2444 goto free_cpu; 2445 } 2446 2447 ph->env.cpu[i].socket_id = nr; 2448 size += sizeof(u32); 2449 } 2450 2451 /* 2452 * The header may be from old perf, 2453 * which doesn't include die information. 2454 */ 2455 if (ff->size <= size) 2456 return 0; 2457 2458 if (do_read_u32(ff, &nr)) 2459 return -1; 2460 2461 ph->env.nr_sibling_dies = nr; 2462 size += sizeof(u32); 2463 2464 for (i = 0; i < nr; i++) { 2465 str = do_read_string(ff); 2466 if (!str) 2467 goto error; 2468 2469 /* include a NULL character at the end */ 2470 if (strbuf_add(&sb, str, strlen(str) + 1) < 0) 2471 goto error; 2472 size += string_size(str); 2473 free(str); 2474 } 2475 ph->env.sibling_dies = strbuf_detach(&sb, NULL); 2476 2477 for (i = 0; i < (u32)cpu_nr; i++) { 2478 if (do_read_u32(ff, &nr)) 2479 goto free_cpu; 2480 2481 ph->env.cpu[i].die_id = nr; 2482 } 2483 2484 return 0; 2485 2486 error: 2487 strbuf_release(&sb); 2488 free_cpu: 2489 zfree(&ph->env.cpu); 2490 return -1; 2491 } 2492 2493 static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused) 2494 { 2495 struct numa_node *nodes, *n; 2496 u32 nr, i; 2497 char *str; 2498 2499 /* nr nodes */ 2500 if (do_read_u32(ff, &nr)) 2501 return -1; 2502 2503 nodes = zalloc(sizeof(*nodes) * nr); 2504 if (!nodes) 2505 return -ENOMEM; 2506 2507 for (i = 0; i < nr; i++) { 2508 n = &nodes[i]; 2509 2510 /* node number */ 2511 if (do_read_u32(ff, &n->node)) 2512 goto error; 2513 2514 if (do_read_u64(ff, &n->mem_total)) 2515 goto error; 2516 2517 if (do_read_u64(ff, &n->mem_free)) 2518 goto error; 2519 2520 str = do_read_string(ff); 2521 if (!str) 2522 goto error; 2523 2524 n->map = perf_cpu_map__new(str); 2525 if (!n->map) 2526 goto error; 2527 2528 free(str); 2529 } 2530 ff->ph->env.nr_numa_nodes = nr; 2531 ff->ph->env.numa_nodes = nodes; 2532 return 0; 2533 2534 error: 2535 free(nodes); 2536 return -1; 2537 } 2538 2539 static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused) 2540 { 2541 char *name; 2542 u32 pmu_num; 2543 u32 type; 2544 struct strbuf sb; 2545 2546 if (do_read_u32(ff, &pmu_num)) 2547 return -1; 2548 2549 if (!pmu_num) { 2550 pr_debug("pmu mappings not available\n"); 2551 return 0; 2552 } 2553 2554 ff->ph->env.nr_pmu_mappings = pmu_num; 2555 if (strbuf_init(&sb, 128) < 0) 2556 return -1; 2557 2558 while (pmu_num) { 2559 if (do_read_u32(ff, &type)) 2560 goto error; 2561 2562 name = do_read_string(ff); 2563 if (!name) 2564 goto error; 2565 2566 if (strbuf_addf(&sb, "%u:%s", type, name) < 0) 2567 goto error; 2568 /* include a NULL character at the end */ 2569 if (strbuf_add(&sb, "", 1) < 0) 2570 goto error; 2571 2572 if (!strcmp(name, "msr")) 2573 ff->ph->env.msr_pmu_type = type; 2574 2575 free(name); 2576 pmu_num--; 2577 } 2578 ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL); 2579 return 0; 2580 2581 error: 2582 strbuf_release(&sb); 2583 return -1; 2584 } 2585 2586 static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused) 2587 { 2588 size_t ret = -1; 2589 u32 i, nr, nr_groups; 2590 struct perf_session *session; 2591 struct evsel *evsel, *leader = NULL; 2592 struct group_desc { 2593 char *name; 2594 u32 leader_idx; 2595 u32 nr_members; 2596 } *desc; 2597 2598 if (do_read_u32(ff, &nr_groups)) 2599 return -1; 2600 2601 ff->ph->env.nr_groups = nr_groups; 2602 if (!nr_groups) { 2603 pr_debug("group desc not available\n"); 2604 return 0; 2605 } 2606 2607 desc = calloc(nr_groups, sizeof(*desc)); 2608 if (!desc) 2609 return -1; 2610 2611 for (i = 0; i < nr_groups; i++) { 2612 desc[i].name = do_read_string(ff); 2613 if (!desc[i].name) 2614 goto out_free; 2615 2616 if (do_read_u32(ff, &desc[i].leader_idx)) 2617 goto out_free; 2618 2619 if (do_read_u32(ff, &desc[i].nr_members)) 2620 goto out_free; 2621 } 2622 2623 /* 2624 * Rebuild group relationship based on the group_desc 2625 */ 2626 session = container_of(ff->ph, struct perf_session, header); 2627 session->evlist->nr_groups = nr_groups; 2628 2629 i = nr = 0; 2630 evlist__for_each_entry(session->evlist, evsel) { 2631 if (evsel->idx == (int) desc[i].leader_idx) { 2632 evsel->leader = evsel; 2633 /* {anon_group} is a dummy name */ 2634 if (strcmp(desc[i].name, "{anon_group}")) { 2635 evsel->group_name = desc[i].name; 2636 desc[i].name = NULL; 2637 } 2638 evsel->core.nr_members = desc[i].nr_members; 2639 2640 if (i >= nr_groups || nr > 0) { 2641 pr_debug("invalid group desc\n"); 2642 goto out_free; 2643 } 2644 2645 leader = evsel; 2646 nr = evsel->core.nr_members - 1; 2647 i++; 2648 } else if (nr) { 2649 /* This is a group member */ 2650 evsel->leader = leader; 2651 2652 nr--; 2653 } 2654 } 2655 2656 if (i != nr_groups || nr != 0) { 2657 pr_debug("invalid group desc\n"); 2658 goto out_free; 2659 } 2660 2661 ret = 0; 2662 out_free: 2663 for (i = 0; i < nr_groups; i++) 2664 zfree(&desc[i].name); 2665 free(desc); 2666 2667 return ret; 2668 } 2669 2670 static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused) 2671 { 2672 struct perf_session *session; 2673 int err; 2674 2675 session = container_of(ff->ph, struct perf_session, header); 2676 2677 err = auxtrace_index__process(ff->fd, ff->size, session, 2678 ff->ph->needs_swap); 2679 if (err < 0) 2680 pr_err("Failed to process auxtrace index\n"); 2681 return err; 2682 } 2683 2684 static int process_cache(struct feat_fd *ff, void *data __maybe_unused) 2685 { 2686 struct cpu_cache_level *caches; 2687 u32 cnt, i, version; 2688 2689 if (do_read_u32(ff, &version)) 2690 return -1; 2691 2692 if (version != 1) 2693 return -1; 2694 2695 if (do_read_u32(ff, &cnt)) 2696 return -1; 2697 2698 caches = zalloc(sizeof(*caches) * cnt); 2699 if (!caches) 2700 return -1; 2701 2702 for (i = 0; i < cnt; i++) { 2703 struct cpu_cache_level c; 2704 2705 #define _R(v) \ 2706 if (do_read_u32(ff, &c.v))\ 2707 goto out_free_caches; \ 2708 2709 _R(level) 2710 _R(line_size) 2711 _R(sets) 2712 _R(ways) 2713 #undef _R 2714 2715 #define _R(v) \ 2716 c.v = do_read_string(ff); \ 2717 if (!c.v) \ 2718 goto out_free_caches; 2719 2720 _R(type) 2721 _R(size) 2722 _R(map) 2723 #undef _R 2724 2725 caches[i] = c; 2726 } 2727 2728 ff->ph->env.caches = caches; 2729 ff->ph->env.caches_cnt = cnt; 2730 return 0; 2731 out_free_caches: 2732 free(caches); 2733 return -1; 2734 } 2735 2736 static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused) 2737 { 2738 struct perf_session *session; 2739 u64 first_sample_time, last_sample_time; 2740 int ret; 2741 2742 session = container_of(ff->ph, struct perf_session, header); 2743 2744 ret = do_read_u64(ff, &first_sample_time); 2745 if (ret) 2746 return -1; 2747 2748 ret = do_read_u64(ff, &last_sample_time); 2749 if (ret) 2750 return -1; 2751 2752 session->evlist->first_sample_time = first_sample_time; 2753 session->evlist->last_sample_time = last_sample_time; 2754 return 0; 2755 } 2756 2757 static int process_mem_topology(struct feat_fd *ff, 2758 void *data __maybe_unused) 2759 { 2760 struct memory_node *nodes; 2761 u64 version, i, nr, bsize; 2762 int ret = -1; 2763 2764 if (do_read_u64(ff, &version)) 2765 return -1; 2766 2767 if (version != 1) 2768 return -1; 2769 2770 if (do_read_u64(ff, &bsize)) 2771 return -1; 2772 2773 if (do_read_u64(ff, &nr)) 2774 return -1; 2775 2776 nodes = zalloc(sizeof(*nodes) * nr); 2777 if (!nodes) 2778 return -1; 2779 2780 for (i = 0; i < nr; i++) { 2781 struct memory_node n; 2782 2783 #define _R(v) \ 2784 if (do_read_u64(ff, &n.v)) \ 2785 goto out; \ 2786 2787 _R(node) 2788 _R(size) 2789 2790 #undef _R 2791 2792 if (do_read_bitmap(ff, &n.set, &n.size)) 2793 goto out; 2794 2795 nodes[i] = n; 2796 } 2797 2798 ff->ph->env.memory_bsize = bsize; 2799 ff->ph->env.memory_nodes = nodes; 2800 ff->ph->env.nr_memory_nodes = nr; 2801 ret = 0; 2802 2803 out: 2804 if (ret) 2805 free(nodes); 2806 return ret; 2807 } 2808 2809 static int process_clockid(struct feat_fd *ff, 2810 void *data __maybe_unused) 2811 { 2812 if (do_read_u64(ff, &ff->ph->env.clock.clockid_res_ns)) 2813 return -1; 2814 2815 return 0; 2816 } 2817 2818 static int process_clock_data(struct feat_fd *ff, 2819 void *_data __maybe_unused) 2820 { 2821 u32 data32; 2822 u64 data64; 2823 2824 /* version */ 2825 if (do_read_u32(ff, &data32)) 2826 return -1; 2827 2828 if (data32 != 1) 2829 return -1; 2830 2831 /* clockid */ 2832 if (do_read_u32(ff, &data32)) 2833 return -1; 2834 2835 ff->ph->env.clock.clockid = data32; 2836 2837 /* TOD ref time */ 2838 if (do_read_u64(ff, &data64)) 2839 return -1; 2840 2841 ff->ph->env.clock.tod_ns = data64; 2842 2843 /* clockid ref time */ 2844 if (do_read_u64(ff, &data64)) 2845 return -1; 2846 2847 ff->ph->env.clock.clockid_ns = data64; 2848 ff->ph->env.clock.enabled = true; 2849 return 0; 2850 } 2851 2852 static int process_dir_format(struct feat_fd *ff, 2853 void *_data __maybe_unused) 2854 { 2855 struct perf_session *session; 2856 struct perf_data *data; 2857 2858 session = container_of(ff->ph, struct perf_session, header); 2859 data = session->data; 2860 2861 if (WARN_ON(!perf_data__is_dir(data))) 2862 return -1; 2863 2864 return do_read_u64(ff, &data->dir.version); 2865 } 2866 2867 #ifdef HAVE_LIBBPF_SUPPORT 2868 static int process_bpf_prog_info(struct feat_fd *ff, void *data __maybe_unused) 2869 { 2870 struct bpf_prog_info_linear *info_linear; 2871 struct bpf_prog_info_node *info_node; 2872 struct perf_env *env = &ff->ph->env; 2873 u32 count, i; 2874 int err = -1; 2875 2876 if (ff->ph->needs_swap) { 2877 pr_warning("interpreting bpf_prog_info from systems with endianity is not yet supported\n"); 2878 return 0; 2879 } 2880 2881 if (do_read_u32(ff, &count)) 2882 return -1; 2883 2884 down_write(&env->bpf_progs.lock); 2885 2886 for (i = 0; i < count; ++i) { 2887 u32 info_len, data_len; 2888 2889 info_linear = NULL; 2890 info_node = NULL; 2891 if (do_read_u32(ff, &info_len)) 2892 goto out; 2893 if (do_read_u32(ff, &data_len)) 2894 goto out; 2895 2896 if (info_len > sizeof(struct bpf_prog_info)) { 2897 pr_warning("detected invalid bpf_prog_info\n"); 2898 goto out; 2899 } 2900 2901 info_linear = malloc(sizeof(struct bpf_prog_info_linear) + 2902 data_len); 2903 if (!info_linear) 2904 goto out; 2905 info_linear->info_len = sizeof(struct bpf_prog_info); 2906 info_linear->data_len = data_len; 2907 if (do_read_u64(ff, (u64 *)(&info_linear->arrays))) 2908 goto out; 2909 if (__do_read(ff, &info_linear->info, info_len)) 2910 goto out; 2911 if (info_len < sizeof(struct bpf_prog_info)) 2912 memset(((void *)(&info_linear->info)) + info_len, 0, 2913 sizeof(struct bpf_prog_info) - info_len); 2914 2915 if (__do_read(ff, info_linear->data, data_len)) 2916 goto out; 2917 2918 info_node = malloc(sizeof(struct bpf_prog_info_node)); 2919 if (!info_node) 2920 goto out; 2921 2922 /* after reading from file, translate offset to address */ 2923 bpf_program__bpil_offs_to_addr(info_linear); 2924 info_node->info_linear = info_linear; 2925 perf_env__insert_bpf_prog_info(env, info_node); 2926 } 2927 2928 up_write(&env->bpf_progs.lock); 2929 return 0; 2930 out: 2931 free(info_linear); 2932 free(info_node); 2933 up_write(&env->bpf_progs.lock); 2934 return err; 2935 } 2936 #else // HAVE_LIBBPF_SUPPORT 2937 static int process_bpf_prog_info(struct feat_fd *ff __maybe_unused, void *data __maybe_unused) 2938 { 2939 return 0; 2940 } 2941 #endif // HAVE_LIBBPF_SUPPORT 2942 2943 static int process_bpf_btf(struct feat_fd *ff, void *data __maybe_unused) 2944 { 2945 struct perf_env *env = &ff->ph->env; 2946 struct btf_node *node = NULL; 2947 u32 count, i; 2948 int err = -1; 2949 2950 if (ff->ph->needs_swap) { 2951 pr_warning("interpreting btf from systems with endianity is not yet supported\n"); 2952 return 0; 2953 } 2954 2955 if (do_read_u32(ff, &count)) 2956 return -1; 2957 2958 down_write(&env->bpf_progs.lock); 2959 2960 for (i = 0; i < count; ++i) { 2961 u32 id, data_size; 2962 2963 if (do_read_u32(ff, &id)) 2964 goto out; 2965 if (do_read_u32(ff, &data_size)) 2966 goto out; 2967 2968 node = malloc(sizeof(struct btf_node) + data_size); 2969 if (!node) 2970 goto out; 2971 2972 node->id = id; 2973 node->data_size = data_size; 2974 2975 if (__do_read(ff, node->data, data_size)) 2976 goto out; 2977 2978 perf_env__insert_btf(env, node); 2979 node = NULL; 2980 } 2981 2982 err = 0; 2983 out: 2984 up_write(&env->bpf_progs.lock); 2985 free(node); 2986 return err; 2987 } 2988 2989 static int process_compressed(struct feat_fd *ff, 2990 void *data __maybe_unused) 2991 { 2992 if (do_read_u32(ff, &(ff->ph->env.comp_ver))) 2993 return -1; 2994 2995 if (do_read_u32(ff, &(ff->ph->env.comp_type))) 2996 return -1; 2997 2998 if (do_read_u32(ff, &(ff->ph->env.comp_level))) 2999 return -1; 3000 3001 if (do_read_u32(ff, &(ff->ph->env.comp_ratio))) 3002 return -1; 3003 3004 if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len))) 3005 return -1; 3006 3007 return 0; 3008 } 3009 3010 static int process_cpu_pmu_caps(struct feat_fd *ff, 3011 void *data __maybe_unused) 3012 { 3013 char *name, *value; 3014 struct strbuf sb; 3015 u32 nr_caps; 3016 3017 if (do_read_u32(ff, &nr_caps)) 3018 return -1; 3019 3020 if (!nr_caps) { 3021 pr_debug("cpu pmu capabilities not available\n"); 3022 return 0; 3023 } 3024 3025 ff->ph->env.nr_cpu_pmu_caps = nr_caps; 3026 3027 if (strbuf_init(&sb, 128) < 0) 3028 return -1; 3029 3030 while (nr_caps--) { 3031 name = do_read_string(ff); 3032 if (!name) 3033 goto error; 3034 3035 value = do_read_string(ff); 3036 if (!value) 3037 goto free_name; 3038 3039 if (strbuf_addf(&sb, "%s=%s", name, value) < 0) 3040 goto free_value; 3041 3042 /* include a NULL character at the end */ 3043 if (strbuf_add(&sb, "", 1) < 0) 3044 goto free_value; 3045 3046 if (!strcmp(name, "branches")) 3047 ff->ph->env.max_branches = atoi(value); 3048 3049 free(value); 3050 free(name); 3051 } 3052 ff->ph->env.cpu_pmu_caps = strbuf_detach(&sb, NULL); 3053 return 0; 3054 3055 free_value: 3056 free(value); 3057 free_name: 3058 free(name); 3059 error: 3060 strbuf_release(&sb); 3061 return -1; 3062 } 3063 3064 #define FEAT_OPR(n, func, __full_only) \ 3065 [HEADER_##n] = { \ 3066 .name = __stringify(n), \ 3067 .write = write_##func, \ 3068 .print = print_##func, \ 3069 .full_only = __full_only, \ 3070 .process = process_##func, \ 3071 .synthesize = true \ 3072 } 3073 3074 #define FEAT_OPN(n, func, __full_only) \ 3075 [HEADER_##n] = { \ 3076 .name = __stringify(n), \ 3077 .write = write_##func, \ 3078 .print = print_##func, \ 3079 .full_only = __full_only, \ 3080 .process = process_##func \ 3081 } 3082 3083 /* feature_ops not implemented: */ 3084 #define print_tracing_data NULL 3085 #define print_build_id NULL 3086 3087 #define process_branch_stack NULL 3088 #define process_stat NULL 3089 3090 // Only used in util/synthetic-events.c 3091 const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE]; 3092 3093 const struct perf_header_feature_ops feat_ops[HEADER_LAST_FEATURE] = { 3094 FEAT_OPN(TRACING_DATA, tracing_data, false), 3095 FEAT_OPN(BUILD_ID, build_id, false), 3096 FEAT_OPR(HOSTNAME, hostname, false), 3097 FEAT_OPR(OSRELEASE, osrelease, false), 3098 FEAT_OPR(VERSION, version, false), 3099 FEAT_OPR(ARCH, arch, false), 3100 FEAT_OPR(NRCPUS, nrcpus, false), 3101 FEAT_OPR(CPUDESC, cpudesc, false), 3102 FEAT_OPR(CPUID, cpuid, false), 3103 FEAT_OPR(TOTAL_MEM, total_mem, false), 3104 FEAT_OPR(EVENT_DESC, event_desc, false), 3105 FEAT_OPR(CMDLINE, cmdline, false), 3106 FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true), 3107 FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true), 3108 FEAT_OPN(BRANCH_STACK, branch_stack, false), 3109 FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false), 3110 FEAT_OPR(GROUP_DESC, group_desc, false), 3111 FEAT_OPN(AUXTRACE, auxtrace, false), 3112 FEAT_OPN(STAT, stat, false), 3113 FEAT_OPN(CACHE, cache, true), 3114 FEAT_OPR(SAMPLE_TIME, sample_time, false), 3115 FEAT_OPR(MEM_TOPOLOGY, mem_topology, true), 3116 FEAT_OPR(CLOCKID, clockid, false), 3117 FEAT_OPN(DIR_FORMAT, dir_format, false), 3118 FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false), 3119 FEAT_OPR(BPF_BTF, bpf_btf, false), 3120 FEAT_OPR(COMPRESSED, compressed, false), 3121 FEAT_OPR(CPU_PMU_CAPS, cpu_pmu_caps, false), 3122 FEAT_OPR(CLOCK_DATA, clock_data, false), 3123 }; 3124 3125 struct header_print_data { 3126 FILE *fp; 3127 bool full; /* extended list of headers */ 3128 }; 3129 3130 static int perf_file_section__fprintf_info(struct perf_file_section *section, 3131 struct perf_header *ph, 3132 int feat, int fd, void *data) 3133 { 3134 struct header_print_data *hd = data; 3135 struct feat_fd ff; 3136 3137 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { 3138 pr_debug("Failed to lseek to %" PRIu64 " offset for feature " 3139 "%d, continuing...\n", section->offset, feat); 3140 return 0; 3141 } 3142 if (feat >= HEADER_LAST_FEATURE) { 3143 pr_warning("unknown feature %d\n", feat); 3144 return 0; 3145 } 3146 if (!feat_ops[feat].print) 3147 return 0; 3148 3149 ff = (struct feat_fd) { 3150 .fd = fd, 3151 .ph = ph, 3152 }; 3153 3154 if (!feat_ops[feat].full_only || hd->full) 3155 feat_ops[feat].print(&ff, hd->fp); 3156 else 3157 fprintf(hd->fp, "# %s info available, use -I to display\n", 3158 feat_ops[feat].name); 3159 3160 return 0; 3161 } 3162 3163 int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full) 3164 { 3165 struct header_print_data hd; 3166 struct perf_header *header = &session->header; 3167 int fd = perf_data__fd(session->data); 3168 struct stat st; 3169 time_t stctime; 3170 int ret, bit; 3171 3172 hd.fp = fp; 3173 hd.full = full; 3174 3175 ret = fstat(fd, &st); 3176 if (ret == -1) 3177 return -1; 3178 3179 stctime = st.st_mtime; 3180 fprintf(fp, "# captured on : %s", ctime(&stctime)); 3181 3182 fprintf(fp, "# header version : %u\n", header->version); 3183 fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset); 3184 fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size); 3185 fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset); 3186 3187 perf_header__process_sections(header, fd, &hd, 3188 perf_file_section__fprintf_info); 3189 3190 if (session->data->is_pipe) 3191 return 0; 3192 3193 fprintf(fp, "# missing features: "); 3194 for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) { 3195 if (bit) 3196 fprintf(fp, "%s ", feat_ops[bit].name); 3197 } 3198 3199 fprintf(fp, "\n"); 3200 return 0; 3201 } 3202 3203 static int do_write_feat(struct feat_fd *ff, int type, 3204 struct perf_file_section **p, 3205 struct evlist *evlist) 3206 { 3207 int err; 3208 int ret = 0; 3209 3210 if (perf_header__has_feat(ff->ph, type)) { 3211 if (!feat_ops[type].write) 3212 return -1; 3213 3214 if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) 3215 return -1; 3216 3217 (*p)->offset = lseek(ff->fd, 0, SEEK_CUR); 3218 3219 err = feat_ops[type].write(ff, evlist); 3220 if (err < 0) { 3221 pr_debug("failed to write feature %s\n", feat_ops[type].name); 3222 3223 /* undo anything written */ 3224 lseek(ff->fd, (*p)->offset, SEEK_SET); 3225 3226 return -1; 3227 } 3228 (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset; 3229 (*p)++; 3230 } 3231 return ret; 3232 } 3233 3234 static int perf_header__adds_write(struct perf_header *header, 3235 struct evlist *evlist, int fd) 3236 { 3237 int nr_sections; 3238 struct feat_fd ff; 3239 struct perf_file_section *feat_sec, *p; 3240 int sec_size; 3241 u64 sec_start; 3242 int feat; 3243 int err; 3244 3245 ff = (struct feat_fd){ 3246 .fd = fd, 3247 .ph = header, 3248 }; 3249 3250 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); 3251 if (!nr_sections) 3252 return 0; 3253 3254 feat_sec = p = calloc(nr_sections, sizeof(*feat_sec)); 3255 if (feat_sec == NULL) 3256 return -ENOMEM; 3257 3258 sec_size = sizeof(*feat_sec) * nr_sections; 3259 3260 sec_start = header->feat_offset; 3261 lseek(fd, sec_start + sec_size, SEEK_SET); 3262 3263 for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { 3264 if (do_write_feat(&ff, feat, &p, evlist)) 3265 perf_header__clear_feat(header, feat); 3266 } 3267 3268 lseek(fd, sec_start, SEEK_SET); 3269 /* 3270 * may write more than needed due to dropped feature, but 3271 * this is okay, reader will skip the missing entries 3272 */ 3273 err = do_write(&ff, feat_sec, sec_size); 3274 if (err < 0) 3275 pr_debug("failed to write feature section\n"); 3276 free(feat_sec); 3277 return err; 3278 } 3279 3280 int perf_header__write_pipe(int fd) 3281 { 3282 struct perf_pipe_file_header f_header; 3283 struct feat_fd ff; 3284 int err; 3285 3286 ff = (struct feat_fd){ .fd = fd }; 3287 3288 f_header = (struct perf_pipe_file_header){ 3289 .magic = PERF_MAGIC, 3290 .size = sizeof(f_header), 3291 }; 3292 3293 err = do_write(&ff, &f_header, sizeof(f_header)); 3294 if (err < 0) { 3295 pr_debug("failed to write perf pipe header\n"); 3296 return err; 3297 } 3298 3299 return 0; 3300 } 3301 3302 int perf_session__write_header(struct perf_session *session, 3303 struct evlist *evlist, 3304 int fd, bool at_exit) 3305 { 3306 struct perf_file_header f_header; 3307 struct perf_file_attr f_attr; 3308 struct perf_header *header = &session->header; 3309 struct evsel *evsel; 3310 struct feat_fd ff; 3311 u64 attr_offset; 3312 int err; 3313 3314 ff = (struct feat_fd){ .fd = fd}; 3315 lseek(fd, sizeof(f_header), SEEK_SET); 3316 3317 evlist__for_each_entry(session->evlist, evsel) { 3318 evsel->id_offset = lseek(fd, 0, SEEK_CUR); 3319 err = do_write(&ff, evsel->core.id, evsel->core.ids * sizeof(u64)); 3320 if (err < 0) { 3321 pr_debug("failed to write perf header\n"); 3322 return err; 3323 } 3324 } 3325 3326 attr_offset = lseek(ff.fd, 0, SEEK_CUR); 3327 3328 evlist__for_each_entry(evlist, evsel) { 3329 f_attr = (struct perf_file_attr){ 3330 .attr = evsel->core.attr, 3331 .ids = { 3332 .offset = evsel->id_offset, 3333 .size = evsel->core.ids * sizeof(u64), 3334 } 3335 }; 3336 err = do_write(&ff, &f_attr, sizeof(f_attr)); 3337 if (err < 0) { 3338 pr_debug("failed to write perf header attribute\n"); 3339 return err; 3340 } 3341 } 3342 3343 if (!header->data_offset) 3344 header->data_offset = lseek(fd, 0, SEEK_CUR); 3345 header->feat_offset = header->data_offset + header->data_size; 3346 3347 if (at_exit) { 3348 err = perf_header__adds_write(header, evlist, fd); 3349 if (err < 0) 3350 return err; 3351 } 3352 3353 f_header = (struct perf_file_header){ 3354 .magic = PERF_MAGIC, 3355 .size = sizeof(f_header), 3356 .attr_size = sizeof(f_attr), 3357 .attrs = { 3358 .offset = attr_offset, 3359 .size = evlist->core.nr_entries * sizeof(f_attr), 3360 }, 3361 .data = { 3362 .offset = header->data_offset, 3363 .size = header->data_size, 3364 }, 3365 /* event_types is ignored, store zeros */ 3366 }; 3367 3368 memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features)); 3369 3370 lseek(fd, 0, SEEK_SET); 3371 err = do_write(&ff, &f_header, sizeof(f_header)); 3372 if (err < 0) { 3373 pr_debug("failed to write perf header\n"); 3374 return err; 3375 } 3376 lseek(fd, header->data_offset + header->data_size, SEEK_SET); 3377 3378 return 0; 3379 } 3380 3381 static int perf_header__getbuffer64(struct perf_header *header, 3382 int fd, void *buf, size_t size) 3383 { 3384 if (readn(fd, buf, size) <= 0) 3385 return -1; 3386 3387 if (header->needs_swap) 3388 mem_bswap_64(buf, size); 3389 3390 return 0; 3391 } 3392 3393 int perf_header__process_sections(struct perf_header *header, int fd, 3394 void *data, 3395 int (*process)(struct perf_file_section *section, 3396 struct perf_header *ph, 3397 int feat, int fd, void *data)) 3398 { 3399 struct perf_file_section *feat_sec, *sec; 3400 int nr_sections; 3401 int sec_size; 3402 int feat; 3403 int err; 3404 3405 nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); 3406 if (!nr_sections) 3407 return 0; 3408 3409 feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec)); 3410 if (!feat_sec) 3411 return -1; 3412 3413 sec_size = sizeof(*feat_sec) * nr_sections; 3414 3415 lseek(fd, header->feat_offset, SEEK_SET); 3416 3417 err = perf_header__getbuffer64(header, fd, feat_sec, sec_size); 3418 if (err < 0) 3419 goto out_free; 3420 3421 for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) { 3422 err = process(sec++, header, feat, fd, data); 3423 if (err < 0) 3424 goto out_free; 3425 } 3426 err = 0; 3427 out_free: 3428 free(feat_sec); 3429 return err; 3430 } 3431 3432 static const int attr_file_abi_sizes[] = { 3433 [0] = PERF_ATTR_SIZE_VER0, 3434 [1] = PERF_ATTR_SIZE_VER1, 3435 [2] = PERF_ATTR_SIZE_VER2, 3436 [3] = PERF_ATTR_SIZE_VER3, 3437 [4] = PERF_ATTR_SIZE_VER4, 3438 0, 3439 }; 3440 3441 /* 3442 * In the legacy file format, the magic number is not used to encode endianness. 3443 * hdr_sz was used to encode endianness. But given that hdr_sz can vary based 3444 * on ABI revisions, we need to try all combinations for all endianness to 3445 * detect the endianness. 3446 */ 3447 static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph) 3448 { 3449 uint64_t ref_size, attr_size; 3450 int i; 3451 3452 for (i = 0 ; attr_file_abi_sizes[i]; i++) { 3453 ref_size = attr_file_abi_sizes[i] 3454 + sizeof(struct perf_file_section); 3455 if (hdr_sz != ref_size) { 3456 attr_size = bswap_64(hdr_sz); 3457 if (attr_size != ref_size) 3458 continue; 3459 3460 ph->needs_swap = true; 3461 } 3462 pr_debug("ABI%d perf.data file detected, need_swap=%d\n", 3463 i, 3464 ph->needs_swap); 3465 return 0; 3466 } 3467 /* could not determine endianness */ 3468 return -1; 3469 } 3470 3471 #define PERF_PIPE_HDR_VER0 16 3472 3473 static const size_t attr_pipe_abi_sizes[] = { 3474 [0] = PERF_PIPE_HDR_VER0, 3475 0, 3476 }; 3477 3478 /* 3479 * In the legacy pipe format, there is an implicit assumption that endiannesss 3480 * between host recording the samples, and host parsing the samples is the 3481 * same. This is not always the case given that the pipe output may always be 3482 * redirected into a file and analyzed on a different machine with possibly a 3483 * different endianness and perf_event ABI revsions in the perf tool itself. 3484 */ 3485 static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph) 3486 { 3487 u64 attr_size; 3488 int i; 3489 3490 for (i = 0 ; attr_pipe_abi_sizes[i]; i++) { 3491 if (hdr_sz != attr_pipe_abi_sizes[i]) { 3492 attr_size = bswap_64(hdr_sz); 3493 if (attr_size != hdr_sz) 3494 continue; 3495 3496 ph->needs_swap = true; 3497 } 3498 pr_debug("Pipe ABI%d perf.data file detected\n", i); 3499 return 0; 3500 } 3501 return -1; 3502 } 3503 3504 bool is_perf_magic(u64 magic) 3505 { 3506 if (!memcmp(&magic, __perf_magic1, sizeof(magic)) 3507 || magic == __perf_magic2 3508 || magic == __perf_magic2_sw) 3509 return true; 3510 3511 return false; 3512 } 3513 3514 static int check_magic_endian(u64 magic, uint64_t hdr_sz, 3515 bool is_pipe, struct perf_header *ph) 3516 { 3517 int ret; 3518 3519 /* check for legacy format */ 3520 ret = memcmp(&magic, __perf_magic1, sizeof(magic)); 3521 if (ret == 0) { 3522 ph->version = PERF_HEADER_VERSION_1; 3523 pr_debug("legacy perf.data format\n"); 3524 if (is_pipe) 3525 return try_all_pipe_abis(hdr_sz, ph); 3526 3527 return try_all_file_abis(hdr_sz, ph); 3528 } 3529 /* 3530 * the new magic number serves two purposes: 3531 * - unique number to identify actual perf.data files 3532 * - encode endianness of file 3533 */ 3534 ph->version = PERF_HEADER_VERSION_2; 3535 3536 /* check magic number with one endianness */ 3537 if (magic == __perf_magic2) 3538 return 0; 3539 3540 /* check magic number with opposite endianness */ 3541 if (magic != __perf_magic2_sw) 3542 return -1; 3543 3544 ph->needs_swap = true; 3545 3546 return 0; 3547 } 3548 3549 int perf_file_header__read(struct perf_file_header *header, 3550 struct perf_header *ph, int fd) 3551 { 3552 ssize_t ret; 3553 3554 lseek(fd, 0, SEEK_SET); 3555 3556 ret = readn(fd, header, sizeof(*header)); 3557 if (ret <= 0) 3558 return -1; 3559 3560 if (check_magic_endian(header->magic, 3561 header->attr_size, false, ph) < 0) { 3562 pr_debug("magic/endian check failed\n"); 3563 return -1; 3564 } 3565 3566 if (ph->needs_swap) { 3567 mem_bswap_64(header, offsetof(struct perf_file_header, 3568 adds_features)); 3569 } 3570 3571 if (header->size != sizeof(*header)) { 3572 /* Support the previous format */ 3573 if (header->size == offsetof(typeof(*header), adds_features)) 3574 bitmap_zero(header->adds_features, HEADER_FEAT_BITS); 3575 else 3576 return -1; 3577 } else if (ph->needs_swap) { 3578 /* 3579 * feature bitmap is declared as an array of unsigned longs -- 3580 * not good since its size can differ between the host that 3581 * generated the data file and the host analyzing the file. 3582 * 3583 * We need to handle endianness, but we don't know the size of 3584 * the unsigned long where the file was generated. Take a best 3585 * guess at determining it: try 64-bit swap first (ie., file 3586 * created on a 64-bit host), and check if the hostname feature 3587 * bit is set (this feature bit is forced on as of fbe96f2). 3588 * If the bit is not, undo the 64-bit swap and try a 32-bit 3589 * swap. If the hostname bit is still not set (e.g., older data 3590 * file), punt and fallback to the original behavior -- 3591 * clearing all feature bits and setting buildid. 3592 */ 3593 mem_bswap_64(&header->adds_features, 3594 BITS_TO_U64(HEADER_FEAT_BITS)); 3595 3596 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { 3597 /* unswap as u64 */ 3598 mem_bswap_64(&header->adds_features, 3599 BITS_TO_U64(HEADER_FEAT_BITS)); 3600 3601 /* unswap as u32 */ 3602 mem_bswap_32(&header->adds_features, 3603 BITS_TO_U32(HEADER_FEAT_BITS)); 3604 } 3605 3606 if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { 3607 bitmap_zero(header->adds_features, HEADER_FEAT_BITS); 3608 set_bit(HEADER_BUILD_ID, header->adds_features); 3609 } 3610 } 3611 3612 memcpy(&ph->adds_features, &header->adds_features, 3613 sizeof(ph->adds_features)); 3614 3615 ph->data_offset = header->data.offset; 3616 ph->data_size = header->data.size; 3617 ph->feat_offset = header->data.offset + header->data.size; 3618 return 0; 3619 } 3620 3621 static int perf_file_section__process(struct perf_file_section *section, 3622 struct perf_header *ph, 3623 int feat, int fd, void *data) 3624 { 3625 struct feat_fd fdd = { 3626 .fd = fd, 3627 .ph = ph, 3628 .size = section->size, 3629 .offset = section->offset, 3630 }; 3631 3632 if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { 3633 pr_debug("Failed to lseek to %" PRIu64 " offset for feature " 3634 "%d, continuing...\n", section->offset, feat); 3635 return 0; 3636 } 3637 3638 if (feat >= HEADER_LAST_FEATURE) { 3639 pr_debug("unknown feature %d, continuing...\n", feat); 3640 return 0; 3641 } 3642 3643 if (!feat_ops[feat].process) 3644 return 0; 3645 3646 return feat_ops[feat].process(&fdd, data); 3647 } 3648 3649 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, 3650 struct perf_header *ph, int fd, 3651 bool repipe) 3652 { 3653 struct feat_fd ff = { 3654 .fd = STDOUT_FILENO, 3655 .ph = ph, 3656 }; 3657 ssize_t ret; 3658 3659 ret = readn(fd, header, sizeof(*header)); 3660 if (ret <= 0) 3661 return -1; 3662 3663 if (check_magic_endian(header->magic, header->size, true, ph) < 0) { 3664 pr_debug("endian/magic failed\n"); 3665 return -1; 3666 } 3667 3668 if (ph->needs_swap) 3669 header->size = bswap_64(header->size); 3670 3671 if (repipe && do_write(&ff, header, sizeof(*header)) < 0) 3672 return -1; 3673 3674 return 0; 3675 } 3676 3677 static int perf_header__read_pipe(struct perf_session *session) 3678 { 3679 struct perf_header *header = &session->header; 3680 struct perf_pipe_file_header f_header; 3681 3682 if (perf_file_header__read_pipe(&f_header, header, 3683 perf_data__fd(session->data), 3684 session->repipe) < 0) { 3685 pr_debug("incompatible file format\n"); 3686 return -EINVAL; 3687 } 3688 3689 return f_header.size == sizeof(f_header) ? 0 : -1; 3690 } 3691 3692 static int read_attr(int fd, struct perf_header *ph, 3693 struct perf_file_attr *f_attr) 3694 { 3695 struct perf_event_attr *attr = &f_attr->attr; 3696 size_t sz, left; 3697 size_t our_sz = sizeof(f_attr->attr); 3698 ssize_t ret; 3699 3700 memset(f_attr, 0, sizeof(*f_attr)); 3701 3702 /* read minimal guaranteed structure */ 3703 ret = readn(fd, attr, PERF_ATTR_SIZE_VER0); 3704 if (ret <= 0) { 3705 pr_debug("cannot read %d bytes of header attr\n", 3706 PERF_ATTR_SIZE_VER0); 3707 return -1; 3708 } 3709 3710 /* on file perf_event_attr size */ 3711 sz = attr->size; 3712 3713 if (ph->needs_swap) 3714 sz = bswap_32(sz); 3715 3716 if (sz == 0) { 3717 /* assume ABI0 */ 3718 sz = PERF_ATTR_SIZE_VER0; 3719 } else if (sz > our_sz) { 3720 pr_debug("file uses a more recent and unsupported ABI" 3721 " (%zu bytes extra)\n", sz - our_sz); 3722 return -1; 3723 } 3724 /* what we have not yet read and that we know about */ 3725 left = sz - PERF_ATTR_SIZE_VER0; 3726 if (left) { 3727 void *ptr = attr; 3728 ptr += PERF_ATTR_SIZE_VER0; 3729 3730 ret = readn(fd, ptr, left); 3731 } 3732 /* read perf_file_section, ids are read in caller */ 3733 ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids)); 3734 3735 return ret <= 0 ? -1 : 0; 3736 } 3737 3738 static int perf_evsel__prepare_tracepoint_event(struct evsel *evsel, 3739 struct tep_handle *pevent) 3740 { 3741 struct tep_event *event; 3742 char bf[128]; 3743 3744 /* already prepared */ 3745 if (evsel->tp_format) 3746 return 0; 3747 3748 if (pevent == NULL) { 3749 pr_debug("broken or missing trace data\n"); 3750 return -1; 3751 } 3752 3753 event = tep_find_event(pevent, evsel->core.attr.config); 3754 if (event == NULL) { 3755 pr_debug("cannot find event format for %d\n", (int)evsel->core.attr.config); 3756 return -1; 3757 } 3758 3759 if (!evsel->name) { 3760 snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); 3761 evsel->name = strdup(bf); 3762 if (evsel->name == NULL) 3763 return -1; 3764 } 3765 3766 evsel->tp_format = event; 3767 return 0; 3768 } 3769 3770 static int perf_evlist__prepare_tracepoint_events(struct evlist *evlist, 3771 struct tep_handle *pevent) 3772 { 3773 struct evsel *pos; 3774 3775 evlist__for_each_entry(evlist, pos) { 3776 if (pos->core.attr.type == PERF_TYPE_TRACEPOINT && 3777 perf_evsel__prepare_tracepoint_event(pos, pevent)) 3778 return -1; 3779 } 3780 3781 return 0; 3782 } 3783 3784 int perf_session__read_header(struct perf_session *session) 3785 { 3786 struct perf_data *data = session->data; 3787 struct perf_header *header = &session->header; 3788 struct perf_file_header f_header; 3789 struct perf_file_attr f_attr; 3790 u64 f_id; 3791 int nr_attrs, nr_ids, i, j, err; 3792 int fd = perf_data__fd(data); 3793 3794 session->evlist = evlist__new(); 3795 if (session->evlist == NULL) 3796 return -ENOMEM; 3797 3798 session->evlist->env = &header->env; 3799 session->machines.host.env = &header->env; 3800 3801 /* 3802 * We can read 'pipe' data event from regular file, 3803 * check for the pipe header regardless of source. 3804 */ 3805 err = perf_header__read_pipe(session); 3806 if (!err || (err && perf_data__is_pipe(data))) { 3807 data->is_pipe = true; 3808 return err; 3809 } 3810 3811 if (perf_file_header__read(&f_header, header, fd) < 0) 3812 return -EINVAL; 3813 3814 /* 3815 * Sanity check that perf.data was written cleanly; data size is 3816 * initialized to 0 and updated only if the on_exit function is run. 3817 * If data size is still 0 then the file contains only partial 3818 * information. Just warn user and process it as much as it can. 3819 */ 3820 if (f_header.data.size == 0) { 3821 pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n" 3822 "Was the 'perf record' command properly terminated?\n", 3823 data->file.path); 3824 } 3825 3826 if (f_header.attr_size == 0) { 3827 pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n" 3828 "Was the 'perf record' command properly terminated?\n", 3829 data->file.path); 3830 return -EINVAL; 3831 } 3832 3833 nr_attrs = f_header.attrs.size / f_header.attr_size; 3834 lseek(fd, f_header.attrs.offset, SEEK_SET); 3835 3836 for (i = 0; i < nr_attrs; i++) { 3837 struct evsel *evsel; 3838 off_t tmp; 3839 3840 if (read_attr(fd, header, &f_attr) < 0) 3841 goto out_errno; 3842 3843 if (header->needs_swap) { 3844 f_attr.ids.size = bswap_64(f_attr.ids.size); 3845 f_attr.ids.offset = bswap_64(f_attr.ids.offset); 3846 perf_event__attr_swap(&f_attr.attr); 3847 } 3848 3849 tmp = lseek(fd, 0, SEEK_CUR); 3850 evsel = evsel__new(&f_attr.attr); 3851 3852 if (evsel == NULL) 3853 goto out_delete_evlist; 3854 3855 evsel->needs_swap = header->needs_swap; 3856 /* 3857 * Do it before so that if perf_evsel__alloc_id fails, this 3858 * entry gets purged too at evlist__delete(). 3859 */ 3860 evlist__add(session->evlist, evsel); 3861 3862 nr_ids = f_attr.ids.size / sizeof(u64); 3863 /* 3864 * We don't have the cpu and thread maps on the header, so 3865 * for allocating the perf_sample_id table we fake 1 cpu and 3866 * hattr->ids threads. 3867 */ 3868 if (perf_evsel__alloc_id(&evsel->core, 1, nr_ids)) 3869 goto out_delete_evlist; 3870 3871 lseek(fd, f_attr.ids.offset, SEEK_SET); 3872 3873 for (j = 0; j < nr_ids; j++) { 3874 if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id))) 3875 goto out_errno; 3876 3877 perf_evlist__id_add(&session->evlist->core, &evsel->core, 0, j, f_id); 3878 } 3879 3880 lseek(fd, tmp, SEEK_SET); 3881 } 3882 3883 perf_header__process_sections(header, fd, &session->tevent, 3884 perf_file_section__process); 3885 3886 if (perf_evlist__prepare_tracepoint_events(session->evlist, 3887 session->tevent.pevent)) 3888 goto out_delete_evlist; 3889 3890 return 0; 3891 out_errno: 3892 return -errno; 3893 3894 out_delete_evlist: 3895 evlist__delete(session->evlist); 3896 session->evlist = NULL; 3897 return -ENOMEM; 3898 } 3899 3900 int perf_event__process_feature(struct perf_session *session, 3901 union perf_event *event) 3902 { 3903 struct perf_tool *tool = session->tool; 3904 struct feat_fd ff = { .fd = 0 }; 3905 struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event; 3906 int type = fe->header.type; 3907 u64 feat = fe->feat_id; 3908 3909 if (type < 0 || type >= PERF_RECORD_HEADER_MAX) { 3910 pr_warning("invalid record type %d in pipe-mode\n", type); 3911 return 0; 3912 } 3913 if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) { 3914 pr_warning("invalid record type %d in pipe-mode\n", type); 3915 return -1; 3916 } 3917 3918 if (!feat_ops[feat].process) 3919 return 0; 3920 3921 ff.buf = (void *)fe->data; 3922 ff.size = event->header.size - sizeof(*fe); 3923 ff.ph = &session->header; 3924 3925 if (feat_ops[feat].process(&ff, NULL)) 3926 return -1; 3927 3928 if (!feat_ops[feat].print || !tool->show_feat_hdr) 3929 return 0; 3930 3931 if (!feat_ops[feat].full_only || 3932 tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) { 3933 feat_ops[feat].print(&ff, stdout); 3934 } else { 3935 fprintf(stdout, "# %s info available, use -I to display\n", 3936 feat_ops[feat].name); 3937 } 3938 3939 return 0; 3940 } 3941 3942 size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp) 3943 { 3944 struct perf_record_event_update *ev = &event->event_update; 3945 struct perf_record_event_update_scale *ev_scale; 3946 struct perf_record_event_update_cpus *ev_cpus; 3947 struct perf_cpu_map *map; 3948 size_t ret; 3949 3950 ret = fprintf(fp, "\n... id: %" PRI_lu64 "\n", ev->id); 3951 3952 switch (ev->type) { 3953 case PERF_EVENT_UPDATE__SCALE: 3954 ev_scale = (struct perf_record_event_update_scale *)ev->data; 3955 ret += fprintf(fp, "... scale: %f\n", ev_scale->scale); 3956 break; 3957 case PERF_EVENT_UPDATE__UNIT: 3958 ret += fprintf(fp, "... unit: %s\n", ev->data); 3959 break; 3960 case PERF_EVENT_UPDATE__NAME: 3961 ret += fprintf(fp, "... name: %s\n", ev->data); 3962 break; 3963 case PERF_EVENT_UPDATE__CPUS: 3964 ev_cpus = (struct perf_record_event_update_cpus *)ev->data; 3965 ret += fprintf(fp, "... "); 3966 3967 map = cpu_map__new_data(&ev_cpus->cpus); 3968 if (map) 3969 ret += cpu_map__fprintf(map, fp); 3970 else 3971 ret += fprintf(fp, "failed to get cpus\n"); 3972 break; 3973 default: 3974 ret += fprintf(fp, "... unknown type\n"); 3975 break; 3976 } 3977 3978 return ret; 3979 } 3980 3981 int perf_event__process_attr(struct perf_tool *tool __maybe_unused, 3982 union perf_event *event, 3983 struct evlist **pevlist) 3984 { 3985 u32 i, ids, n_ids; 3986 struct evsel *evsel; 3987 struct evlist *evlist = *pevlist; 3988 3989 if (evlist == NULL) { 3990 *pevlist = evlist = evlist__new(); 3991 if (evlist == NULL) 3992 return -ENOMEM; 3993 } 3994 3995 evsel = evsel__new(&event->attr.attr); 3996 if (evsel == NULL) 3997 return -ENOMEM; 3998 3999 evlist__add(evlist, evsel); 4000 4001 ids = event->header.size; 4002 ids -= (void *)&event->attr.id - (void *)event; 4003 n_ids = ids / sizeof(u64); 4004 /* 4005 * We don't have the cpu and thread maps on the header, so 4006 * for allocating the perf_sample_id table we fake 1 cpu and 4007 * hattr->ids threads. 4008 */ 4009 if (perf_evsel__alloc_id(&evsel->core, 1, n_ids)) 4010 return -ENOMEM; 4011 4012 for (i = 0; i < n_ids; i++) { 4013 perf_evlist__id_add(&evlist->core, &evsel->core, 0, i, event->attr.id[i]); 4014 } 4015 4016 return 0; 4017 } 4018 4019 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused, 4020 union perf_event *event, 4021 struct evlist **pevlist) 4022 { 4023 struct perf_record_event_update *ev = &event->event_update; 4024 struct perf_record_event_update_scale *ev_scale; 4025 struct perf_record_event_update_cpus *ev_cpus; 4026 struct evlist *evlist; 4027 struct evsel *evsel; 4028 struct perf_cpu_map *map; 4029 4030 if (!pevlist || *pevlist == NULL) 4031 return -EINVAL; 4032 4033 evlist = *pevlist; 4034 4035 evsel = perf_evlist__id2evsel(evlist, ev->id); 4036 if (evsel == NULL) 4037 return -EINVAL; 4038 4039 switch (ev->type) { 4040 case PERF_EVENT_UPDATE__UNIT: 4041 evsel->unit = strdup(ev->data); 4042 break; 4043 case PERF_EVENT_UPDATE__NAME: 4044 evsel->name = strdup(ev->data); 4045 break; 4046 case PERF_EVENT_UPDATE__SCALE: 4047 ev_scale = (struct perf_record_event_update_scale *)ev->data; 4048 evsel->scale = ev_scale->scale; 4049 break; 4050 case PERF_EVENT_UPDATE__CPUS: 4051 ev_cpus = (struct perf_record_event_update_cpus *)ev->data; 4052 4053 map = cpu_map__new_data(&ev_cpus->cpus); 4054 if (map) 4055 evsel->core.own_cpus = map; 4056 else 4057 pr_err("failed to get event_update cpus\n"); 4058 default: 4059 break; 4060 } 4061 4062 return 0; 4063 } 4064 4065 int perf_event__process_tracing_data(struct perf_session *session, 4066 union perf_event *event) 4067 { 4068 ssize_t size_read, padding, size = event->tracing_data.size; 4069 int fd = perf_data__fd(session->data); 4070 char buf[BUFSIZ]; 4071 4072 /* 4073 * The pipe fd is already in proper place and in any case 4074 * we can't move it, and we'd screw the case where we read 4075 * 'pipe' data from regular file. The trace_report reads 4076 * data from 'fd' so we need to set it directly behind the 4077 * event, where the tracing data starts. 4078 */ 4079 if (!perf_data__is_pipe(session->data)) { 4080 off_t offset = lseek(fd, 0, SEEK_CUR); 4081 4082 /* setup for reading amidst mmap */ 4083 lseek(fd, offset + sizeof(struct perf_record_header_tracing_data), 4084 SEEK_SET); 4085 } 4086 4087 size_read = trace_report(fd, &session->tevent, 4088 session->repipe); 4089 padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read; 4090 4091 if (readn(fd, buf, padding) < 0) { 4092 pr_err("%s: reading input file", __func__); 4093 return -1; 4094 } 4095 if (session->repipe) { 4096 int retw = write(STDOUT_FILENO, buf, padding); 4097 if (retw <= 0 || retw != padding) { 4098 pr_err("%s: repiping tracing data padding", __func__); 4099 return -1; 4100 } 4101 } 4102 4103 if (size_read + padding != size) { 4104 pr_err("%s: tracing data size mismatch", __func__); 4105 return -1; 4106 } 4107 4108 perf_evlist__prepare_tracepoint_events(session->evlist, 4109 session->tevent.pevent); 4110 4111 return size_read + padding; 4112 } 4113 4114 int perf_event__process_build_id(struct perf_session *session, 4115 union perf_event *event) 4116 { 4117 __event_process_build_id(&event->build_id, 4118 event->build_id.filename, 4119 session); 4120 return 0; 4121 } 4122