1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * builtin-test.c 4 * 5 * Builtin regression testing command: ever growing number of sanity tests 6 */ 7 #include <fcntl.h> 8 #include <errno.h> 9 #include <unistd.h> 10 #include <string.h> 11 #include <stdlib.h> 12 #include <sys/types.h> 13 #include <dirent.h> 14 #include <sys/wait.h> 15 #include <sys/stat.h> 16 #include "builtin.h" 17 #include "hist.h" 18 #include "intlist.h" 19 #include "tests.h" 20 #include "debug.h" 21 #include "color.h" 22 #include <subcmd/parse-options.h> 23 #include "string2.h" 24 #include "symbol.h" 25 #include "util/rlimit.h" 26 #include <linux/kernel.h> 27 #include <linux/string.h> 28 #include <subcmd/exec-cmd.h> 29 30 static bool dont_fork; 31 32 struct test __weak arch_tests[] = { 33 { 34 .func = NULL, 35 }, 36 }; 37 38 static struct test generic_tests[] = { 39 { 40 .desc = "vmlinux symtab matches kallsyms", 41 .func = test__vmlinux_matches_kallsyms, 42 }, 43 { 44 .desc = "Detect openat syscall event", 45 .func = test__openat_syscall_event, 46 }, 47 { 48 .desc = "Detect openat syscall event on all cpus", 49 .func = test__openat_syscall_event_on_all_cpus, 50 }, 51 { 52 .desc = "Read samples using the mmap interface", 53 .func = test__basic_mmap, 54 }, 55 { 56 .desc = "Test data source output", 57 .func = test__mem, 58 }, 59 { 60 .desc = "Parse event definition strings", 61 .func = test__parse_events, 62 }, 63 { 64 .desc = "Simple expression parser", 65 .func = test__expr, 66 }, 67 { 68 .desc = "PERF_RECORD_* events & perf_sample fields", 69 .func = test__PERF_RECORD, 70 }, 71 { 72 .desc = "Parse perf pmu format", 73 .func = test__pmu, 74 }, 75 { 76 .desc = "DSO data read", 77 .func = test__dso_data, 78 }, 79 { 80 .desc = "DSO data cache", 81 .func = test__dso_data_cache, 82 }, 83 { 84 .desc = "DSO data reopen", 85 .func = test__dso_data_reopen, 86 }, 87 { 88 .desc = "Roundtrip evsel->name", 89 .func = test__perf_evsel__roundtrip_name_test, 90 }, 91 { 92 .desc = "Parse sched tracepoints fields", 93 .func = test__perf_evsel__tp_sched_test, 94 }, 95 { 96 .desc = "syscalls:sys_enter_openat event fields", 97 .func = test__syscall_openat_tp_fields, 98 }, 99 { 100 .desc = "Setup struct perf_event_attr", 101 .func = test__attr, 102 }, 103 { 104 .desc = "Match and link multiple hists", 105 .func = test__hists_link, 106 }, 107 { 108 .desc = "'import perf' in python", 109 .func = test__python_use, 110 }, 111 { 112 .desc = "Breakpoint overflow signal handler", 113 .func = test__bp_signal, 114 .is_supported = test__bp_signal_is_supported, 115 }, 116 { 117 .desc = "Breakpoint overflow sampling", 118 .func = test__bp_signal_overflow, 119 .is_supported = test__bp_signal_is_supported, 120 }, 121 { 122 .desc = "Breakpoint accounting", 123 .func = test__bp_accounting, 124 .is_supported = test__bp_account_is_supported, 125 }, 126 { 127 .desc = "Watchpoint", 128 .func = test__wp, 129 .is_supported = test__wp_is_supported, 130 .subtest = { 131 .skip_if_fail = false, 132 .get_nr = test__wp_subtest_get_nr, 133 .get_desc = test__wp_subtest_get_desc, 134 }, 135 }, 136 { 137 .desc = "Number of exit events of a simple workload", 138 .func = test__task_exit, 139 }, 140 { 141 .desc = "Software clock events period values", 142 .func = test__sw_clock_freq, 143 }, 144 { 145 .desc = "Object code reading", 146 .func = test__code_reading, 147 }, 148 { 149 .desc = "Sample parsing", 150 .func = test__sample_parsing, 151 }, 152 { 153 .desc = "Use a dummy software event to keep tracking", 154 .func = test__keep_tracking, 155 }, 156 { 157 .desc = "Parse with no sample_id_all bit set", 158 .func = test__parse_no_sample_id_all, 159 }, 160 { 161 .desc = "Filter hist entries", 162 .func = test__hists_filter, 163 }, 164 { 165 .desc = "Lookup mmap thread", 166 .func = test__mmap_thread_lookup, 167 }, 168 { 169 .desc = "Share thread maps", 170 .func = test__thread_maps_share, 171 }, 172 { 173 .desc = "Sort output of hist entries", 174 .func = test__hists_output, 175 }, 176 { 177 .desc = "Cumulate child hist entries", 178 .func = test__hists_cumulate, 179 }, 180 { 181 .desc = "Track with sched_switch", 182 .func = test__switch_tracking, 183 }, 184 { 185 .desc = "Filter fds with revents mask in a fdarray", 186 .func = test__fdarray__filter, 187 }, 188 { 189 .desc = "Add fd to a fdarray, making it autogrow", 190 .func = test__fdarray__add, 191 }, 192 { 193 .desc = "kmod_path__parse", 194 .func = test__kmod_path__parse, 195 }, 196 { 197 .desc = "Thread map", 198 .func = test__thread_map, 199 }, 200 { 201 .desc = "LLVM search and compile", 202 .func = test__llvm, 203 .subtest = { 204 .skip_if_fail = true, 205 .get_nr = test__llvm_subtest_get_nr, 206 .get_desc = test__llvm_subtest_get_desc, 207 }, 208 }, 209 { 210 .desc = "Session topology", 211 .func = test__session_topology, 212 }, 213 { 214 .desc = "BPF filter", 215 .func = test__bpf, 216 .subtest = { 217 .skip_if_fail = true, 218 .get_nr = test__bpf_subtest_get_nr, 219 .get_desc = test__bpf_subtest_get_desc, 220 }, 221 }, 222 { 223 .desc = "Synthesize thread map", 224 .func = test__thread_map_synthesize, 225 }, 226 { 227 .desc = "Remove thread map", 228 .func = test__thread_map_remove, 229 }, 230 { 231 .desc = "Synthesize cpu map", 232 .func = test__cpu_map_synthesize, 233 }, 234 { 235 .desc = "Synthesize stat config", 236 .func = test__synthesize_stat_config, 237 }, 238 { 239 .desc = "Synthesize stat", 240 .func = test__synthesize_stat, 241 }, 242 { 243 .desc = "Synthesize stat round", 244 .func = test__synthesize_stat_round, 245 }, 246 { 247 .desc = "Synthesize attr update", 248 .func = test__event_update, 249 }, 250 { 251 .desc = "Event times", 252 .func = test__event_times, 253 }, 254 { 255 .desc = "Read backward ring buffer", 256 .func = test__backward_ring_buffer, 257 }, 258 { 259 .desc = "Print cpu map", 260 .func = test__cpu_map_print, 261 }, 262 { 263 .desc = "Probe SDT events", 264 .func = test__sdt_event, 265 }, 266 { 267 .desc = "is_printable_array", 268 .func = test__is_printable_array, 269 }, 270 { 271 .desc = "Print bitmap", 272 .func = test__bitmap_print, 273 }, 274 { 275 .desc = "perf hooks", 276 .func = test__perf_hooks, 277 }, 278 { 279 .desc = "builtin clang support", 280 .func = test__clang, 281 .subtest = { 282 .skip_if_fail = true, 283 .get_nr = test__clang_subtest_get_nr, 284 .get_desc = test__clang_subtest_get_desc, 285 } 286 }, 287 { 288 .desc = "unit_number__scnprintf", 289 .func = test__unit_number__scnprint, 290 }, 291 { 292 .desc = "mem2node", 293 .func = test__mem2node, 294 }, 295 { 296 .desc = "time utils", 297 .func = test__time_utils, 298 }, 299 { 300 .desc = "maps__merge_in", 301 .func = test__maps__merge_in, 302 }, 303 { 304 .func = NULL, 305 }, 306 }; 307 308 static struct test *tests[] = { 309 generic_tests, 310 arch_tests, 311 }; 312 313 static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[]) 314 { 315 int i; 316 317 if (argc == 0) 318 return true; 319 320 for (i = 0; i < argc; ++i) { 321 char *end; 322 long nr = strtoul(argv[i], &end, 10); 323 324 if (*end == '\0') { 325 if (nr == curr + 1) 326 return true; 327 continue; 328 } 329 330 if (strcasestr(test->desc, argv[i])) 331 return true; 332 } 333 334 return false; 335 } 336 337 static int run_test(struct test *test, int subtest) 338 { 339 int status, err = -1, child = dont_fork ? 0 : fork(); 340 char sbuf[STRERR_BUFSIZE]; 341 342 if (child < 0) { 343 pr_err("failed to fork test: %s\n", 344 str_error_r(errno, sbuf, sizeof(sbuf))); 345 return -1; 346 } 347 348 if (!child) { 349 if (!dont_fork) { 350 pr_debug("test child forked, pid %d\n", getpid()); 351 352 if (verbose <= 0) { 353 int nullfd = open("/dev/null", O_WRONLY); 354 355 if (nullfd >= 0) { 356 close(STDERR_FILENO); 357 close(STDOUT_FILENO); 358 359 dup2(nullfd, STDOUT_FILENO); 360 dup2(STDOUT_FILENO, STDERR_FILENO); 361 close(nullfd); 362 } 363 } else { 364 signal(SIGSEGV, sighandler_dump_stack); 365 signal(SIGFPE, sighandler_dump_stack); 366 } 367 } 368 369 err = test->func(test, subtest); 370 if (!dont_fork) 371 exit(err); 372 } 373 374 if (!dont_fork) { 375 wait(&status); 376 377 if (WIFEXITED(status)) { 378 err = (signed char)WEXITSTATUS(status); 379 pr_debug("test child finished with %d\n", err); 380 } else if (WIFSIGNALED(status)) { 381 err = -1; 382 pr_debug("test child interrupted\n"); 383 } 384 } 385 386 return err; 387 } 388 389 #define for_each_test(j, t) \ 390 for (j = 0; j < ARRAY_SIZE(tests); j++) \ 391 for (t = &tests[j][0]; t->func; t++) 392 393 static int test_and_print(struct test *t, bool force_skip, int subtest) 394 { 395 int err; 396 397 if (!force_skip) { 398 pr_debug("\n--- start ---\n"); 399 err = run_test(t, subtest); 400 pr_debug("---- end ----\n"); 401 } else { 402 pr_debug("\n--- force skipped ---\n"); 403 err = TEST_SKIP; 404 } 405 406 if (!t->subtest.get_nr) 407 pr_debug("%s:", t->desc); 408 else 409 pr_debug("%s subtest %d:", t->desc, subtest + 1); 410 411 switch (err) { 412 case TEST_OK: 413 pr_info(" Ok\n"); 414 break; 415 case TEST_SKIP: 416 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n"); 417 break; 418 case TEST_FAIL: 419 default: 420 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n"); 421 break; 422 } 423 424 return err; 425 } 426 427 static const char *shell_test__description(char *description, size_t size, 428 const char *path, const char *name) 429 { 430 FILE *fp; 431 char filename[PATH_MAX]; 432 433 path__join(filename, sizeof(filename), path, name); 434 fp = fopen(filename, "r"); 435 if (!fp) 436 return NULL; 437 438 /* Skip shebang */ 439 while (fgetc(fp) != '\n'); 440 441 description = fgets(description, size, fp); 442 fclose(fp); 443 444 return description ? strim(description + 1) : NULL; 445 } 446 447 #define for_each_shell_test(dir, base, ent) \ 448 while ((ent = readdir(dir)) != NULL) \ 449 if (!is_directory(base, ent) && ent->d_name[0] != '.') 450 451 static const char *shell_tests__dir(char *path, size_t size) 452 { 453 const char *devel_dirs[] = { "./tools/perf/tests", "./tests", }; 454 char *exec_path; 455 unsigned int i; 456 457 for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) { 458 struct stat st; 459 if (!lstat(devel_dirs[i], &st)) { 460 scnprintf(path, size, "%s/shell", devel_dirs[i]); 461 if (!lstat(devel_dirs[i], &st)) 462 return path; 463 } 464 } 465 466 /* Then installed path. */ 467 exec_path = get_argv_exec_path(); 468 scnprintf(path, size, "%s/tests/shell", exec_path); 469 free(exec_path); 470 return path; 471 } 472 473 static int shell_tests__max_desc_width(void) 474 { 475 DIR *dir; 476 struct dirent *ent; 477 char path_dir[PATH_MAX]; 478 const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); 479 int width = 0; 480 481 if (path == NULL) 482 return -1; 483 484 dir = opendir(path); 485 if (!dir) 486 return -1; 487 488 for_each_shell_test(dir, path, ent) { 489 char bf[256]; 490 const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name); 491 492 if (desc) { 493 int len = strlen(desc); 494 495 if (width < len) 496 width = len; 497 } 498 } 499 500 closedir(dir); 501 return width; 502 } 503 504 struct shell_test { 505 const char *dir; 506 const char *file; 507 }; 508 509 static int shell_test__run(struct test *test, int subdir __maybe_unused) 510 { 511 int err; 512 char script[PATH_MAX]; 513 struct shell_test *st = test->priv; 514 515 path__join(script, sizeof(script), st->dir, st->file); 516 517 err = system(script); 518 if (!err) 519 return TEST_OK; 520 521 return WEXITSTATUS(err) == 2 ? TEST_SKIP : TEST_FAIL; 522 } 523 524 static int run_shell_tests(int argc, const char *argv[], int i, int width) 525 { 526 DIR *dir; 527 struct dirent *ent; 528 char path_dir[PATH_MAX]; 529 struct shell_test st = { 530 .dir = shell_tests__dir(path_dir, sizeof(path_dir)), 531 }; 532 533 if (st.dir == NULL) 534 return -1; 535 536 dir = opendir(st.dir); 537 if (!dir) 538 return -1; 539 540 for_each_shell_test(dir, st.dir, ent) { 541 int curr = i++; 542 char desc[256]; 543 struct test test = { 544 .desc = shell_test__description(desc, sizeof(desc), st.dir, ent->d_name), 545 .func = shell_test__run, 546 .priv = &st, 547 }; 548 549 if (!perf_test__matches(&test, curr, argc, argv)) 550 continue; 551 552 st.file = ent->d_name; 553 pr_info("%2d: %-*s:", i, width, test.desc); 554 test_and_print(&test, false, -1); 555 } 556 557 closedir(dir); 558 return 0; 559 } 560 561 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) 562 { 563 struct test *t; 564 unsigned int j; 565 int i = 0; 566 int width = shell_tests__max_desc_width(); 567 568 for_each_test(j, t) { 569 int len = strlen(t->desc); 570 571 if (width < len) 572 width = len; 573 } 574 575 for_each_test(j, t) { 576 int curr = i++, err; 577 578 if (!perf_test__matches(t, curr, argc, argv)) 579 continue; 580 581 if (t->is_supported && !t->is_supported()) { 582 pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc); 583 continue; 584 } 585 586 pr_info("%2d: %-*s:", i, width, t->desc); 587 588 if (intlist__find(skiplist, i)) { 589 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n"); 590 continue; 591 } 592 593 if (!t->subtest.get_nr) { 594 test_and_print(t, false, -1); 595 } else { 596 int subn = t->subtest.get_nr(); 597 /* 598 * minus 2 to align with normal testcases. 599 * For subtest we print additional '.x' in number. 600 * for example: 601 * 602 * 35: Test LLVM searching and compiling : 603 * 35.1: Basic BPF llvm compiling test : Ok 604 */ 605 int subw = width > 2 ? width - 2 : width; 606 bool skip = false; 607 int subi; 608 609 if (subn <= 0) { 610 color_fprintf(stderr, PERF_COLOR_YELLOW, 611 " Skip (not compiled in)\n"); 612 continue; 613 } 614 pr_info("\n"); 615 616 for (subi = 0; subi < subn; subi++) { 617 int len = strlen(t->subtest.get_desc(subi)); 618 619 if (subw < len) 620 subw = len; 621 } 622 623 for (subi = 0; subi < subn; subi++) { 624 pr_info("%2d.%1d: %-*s:", i, subi + 1, subw, 625 t->subtest.get_desc(subi)); 626 err = test_and_print(t, skip, subi); 627 if (err != TEST_OK && t->subtest.skip_if_fail) 628 skip = true; 629 } 630 } 631 } 632 633 return run_shell_tests(argc, argv, i, width); 634 } 635 636 static int perf_test__list_shell(int argc, const char **argv, int i) 637 { 638 DIR *dir; 639 struct dirent *ent; 640 char path_dir[PATH_MAX]; 641 const char *path = shell_tests__dir(path_dir, sizeof(path_dir)); 642 643 if (path == NULL) 644 return -1; 645 646 dir = opendir(path); 647 if (!dir) 648 return -1; 649 650 for_each_shell_test(dir, path, ent) { 651 int curr = i++; 652 char bf[256]; 653 struct test t = { 654 .desc = shell_test__description(bf, sizeof(bf), path, ent->d_name), 655 }; 656 657 if (!perf_test__matches(&t, curr, argc, argv)) 658 continue; 659 660 pr_info("%2d: %s\n", i, t.desc); 661 } 662 663 closedir(dir); 664 return 0; 665 } 666 667 static int perf_test__list(int argc, const char **argv) 668 { 669 unsigned int j; 670 struct test *t; 671 int i = 0; 672 673 for_each_test(j, t) { 674 int curr = i++; 675 676 if (!perf_test__matches(t, curr, argc, argv) || 677 (t->is_supported && !t->is_supported())) 678 continue; 679 680 pr_info("%2d: %s\n", i, t->desc); 681 682 if (t->subtest.get_nr) { 683 int subn = t->subtest.get_nr(); 684 int subi; 685 686 for (subi = 0; subi < subn; subi++) 687 pr_info("%2d:%1d: %s\n", i, subi + 1, 688 t->subtest.get_desc(subi)); 689 } 690 } 691 692 perf_test__list_shell(argc, argv, i); 693 694 return 0; 695 } 696 697 int cmd_test(int argc, const char **argv) 698 { 699 const char *test_usage[] = { 700 "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]", 701 NULL, 702 }; 703 const char *skip = NULL; 704 const struct option test_options[] = { 705 OPT_STRING('s', "skip", &skip, "tests", "tests to skip"), 706 OPT_INCR('v', "verbose", &verbose, 707 "be more verbose (show symbol address, etc)"), 708 OPT_BOOLEAN('F', "dont-fork", &dont_fork, 709 "Do not fork for testcase"), 710 OPT_END() 711 }; 712 const char * const test_subcommands[] = { "list", NULL }; 713 struct intlist *skiplist = NULL; 714 int ret = hists__init(); 715 716 if (ret < 0) 717 return ret; 718 719 argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0); 720 if (argc >= 1 && !strcmp(argv[0], "list")) 721 return perf_test__list(argc - 1, argv + 1); 722 723 symbol_conf.priv_size = sizeof(int); 724 symbol_conf.sort_by_name = true; 725 symbol_conf.try_vmlinux_path = true; 726 727 if (symbol__init(NULL) < 0) 728 return -1; 729 730 if (skip != NULL) 731 skiplist = intlist__new(skip); 732 /* 733 * Tests that create BPF maps, for instance, need more than the 64K 734 * default: 735 */ 736 rlimit__bump_memlock(); 737 738 return __cmd_test(argc, argv, skiplist); 739 } 740