tools/perf/tests/builtin-test.c

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