tools/perf/tests/builtin-test.c

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