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 <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 #include <linux/zalloc.h>
  30
  31 static bool dont_fork;
  32
  33 struct test __weak arch_tests[] = {
  34         {
  35                 .func = NULL,
  36         },
  37 };
  38
  39 static struct test generic_tests[] = {
  40         {
  41                 .desc = "vmlinux symtab matches kallsyms",
  42                 .func = test__vmlinux_matches_kallsyms,
  43         },
  44         {
  45                 .desc = "Detect openat syscall event",
  46                 .func = test__openat_syscall_event,
  47         },
  48         {
  49                 .desc = "Detect openat syscall event on all cpus",
  50                 .func = test__openat_syscall_event_on_all_cpus,
  51         },
  52         {
  53                 .desc = "Read samples using the mmap interface",
  54                 .func = test__basic_mmap,
  55         },
  56         {
  57                 .desc = "Test data source output",
  58                 .func = test__mem,
  59         },
  60         {
  61                 .desc = "Parse event definition strings",
  62                 .func = test__parse_events,
  63         },
  64         {
  65                 .desc = "Simple expression parser",
  66                 .func = test__expr,
  67         },
  68         {
  69                 .desc = "PERF_RECORD_* events & perf_sample fields",
  70                 .func = test__PERF_RECORD,
  71         },
  72         {
  73                 .desc = "Parse perf pmu format",
  74                 .func = test__pmu,
  75         },
  76         {
  77                 .desc = "PMU events",
  78                 .func = test__pmu_events,
  79                 .subtest = {
  80                         .skip_if_fail   = false,
  81                         .get_nr         = test__pmu_events_subtest_get_nr,
  82                         .get_desc       = test__pmu_events_subtest_get_desc,
  83                         .skip_reason    = test__pmu_events_subtest_skip_reason,
  84                 },
  85
  86         },
  87         {
  88                 .desc = "DSO data read",
  89                 .func = test__dso_data,
  90         },
  91         {
  92                 .desc = "DSO data cache",
  93                 .func = test__dso_data_cache,
  94         },
  95         {
  96                 .desc = "DSO data reopen",
  97                 .func = test__dso_data_reopen,
  98         },
  99         {
 100                 .desc = "Roundtrip evsel->name",
 101                 .func = test__perf_evsel__roundtrip_name_test,
 102         },
 103         {
 104                 .desc = "Parse sched tracepoints fields",
 105                 .func = test__perf_evsel__tp_sched_test,
 106         },
 107         {
 108                 .desc = "syscalls:sys_enter_openat event fields",
 109                 .func = test__syscall_openat_tp_fields,
 110         },
 111         {
 112                 .desc = "Setup struct perf_event_attr",
 113                 .func = test__attr,
 114         },
 115         {
 116                 .desc = "Match and link multiple hists",
 117                 .func = test__hists_link,
 118         },
 119         {
 120                 .desc = "'import perf' in python",
 121                 .func = test__python_use,
 122         },
 123         {
 124                 .desc = "Breakpoint overflow signal handler",
 125                 .func = test__bp_signal,
 126                 .is_supported = test__bp_signal_is_supported,
 127         },
 128         {
 129                 .desc = "Breakpoint overflow sampling",
 130                 .func = test__bp_signal_overflow,
 131                 .is_supported = test__bp_signal_is_supported,
 132         },
 133         {
 134                 .desc = "Breakpoint accounting",
 135                 .func = test__bp_accounting,
 136                 .is_supported = test__bp_account_is_supported,
 137         },
 138         {
 139                 .desc = "Watchpoint",
 140                 .func = test__wp,
 141                 .is_supported = test__wp_is_supported,
 142                 .subtest = {
 143                         .skip_if_fail   = false,
 144                         .get_nr         = test__wp_subtest_get_nr,
 145                         .get_desc       = test__wp_subtest_get_desc,
 146                         .skip_reason    = test__wp_subtest_skip_reason,
 147                 },
 148         },
 149         {
 150                 .desc = "Number of exit events of a simple workload",
 151                 .func = test__task_exit,
 152         },
 153         {
 154                 .desc = "Software clock events period values",
 155                 .func = test__sw_clock_freq,
 156         },
 157         {
 158                 .desc = "Object code reading",
 159                 .func = test__code_reading,
 160         },
 161         {
 162                 .desc = "Sample parsing",
 163                 .func = test__sample_parsing,
 164         },
 165         {
 166                 .desc = "Use a dummy software event to keep tracking",
 167                 .func = test__keep_tracking,
 168         },
 169         {
 170                 .desc = "Parse with no sample_id_all bit set",
 171                 .func = test__parse_no_sample_id_all,
 172         },
 173         {
 174                 .desc = "Filter hist entries",
 175                 .func = test__hists_filter,
 176         },
 177         {
 178                 .desc = "Lookup mmap thread",
 179                 .func = test__mmap_thread_lookup,
 180         },
 181         {
 182                 .desc = "Share thread maps",
 183                 .func = test__thread_maps_share,
 184         },
 185         {
 186                 .desc = "Sort output of hist entries",
 187                 .func = test__hists_output,
 188         },
 189         {
 190                 .desc = "Cumulate child hist entries",
 191                 .func = test__hists_cumulate,
 192         },
 193         {
 194                 .desc = "Track with sched_switch",
 195                 .func = test__switch_tracking,
 196         },
 197         {
 198                 .desc = "Filter fds with revents mask in a fdarray",
 199                 .func = test__fdarray__filter,
 200         },
 201         {
 202                 .desc = "Add fd to a fdarray, making it autogrow",
 203                 .func = test__fdarray__add,
 204         },
 205         {
 206                 .desc = "kmod_path__parse",
 207                 .func = test__kmod_path__parse,
 208         },
 209         {
 210                 .desc = "Thread map",
 211                 .func = test__thread_map,
 212         },
 213         {
 214                 .desc = "LLVM search and compile",
 215                 .func = test__llvm,
 216                 .subtest = {
 217                         .skip_if_fail   = true,
 218                         .get_nr         = test__llvm_subtest_get_nr,
 219                         .get_desc       = test__llvm_subtest_get_desc,
 220                 },
 221         },
 222         {
 223                 .desc = "Session topology",
 224                 .func = test__session_topology,
 225         },
 226         {
 227                 .desc = "BPF filter",
 228                 .func = test__bpf,
 229                 .subtest = {
 230                         .skip_if_fail   = true,
 231                         .get_nr         = test__bpf_subtest_get_nr,
 232                         .get_desc       = test__bpf_subtest_get_desc,
 233                 },
 234         },
 235         {
 236                 .desc = "Synthesize thread map",
 237                 .func = test__thread_map_synthesize,
 238         },
 239         {
 240                 .desc = "Remove thread map",
 241                 .func = test__thread_map_remove,
 242         },
 243         {
 244                 .desc = "Synthesize cpu map",
 245                 .func = test__cpu_map_synthesize,
 246         },
 247         {
 248                 .desc = "Synthesize stat config",
 249                 .func = test__synthesize_stat_config,
 250         },
 251         {
 252                 .desc = "Synthesize stat",
 253                 .func = test__synthesize_stat,
 254         },
 255         {
 256                 .desc = "Synthesize stat round",
 257                 .func = test__synthesize_stat_round,
 258         },
 259         {
 260                 .desc = "Synthesize attr update",
 261                 .func = test__event_update,
 262         },
 263         {
 264                 .desc = "Event times",
 265                 .func = test__event_times,
 266         },
 267         {
 268                 .desc = "Read backward ring buffer",
 269                 .func = test__backward_ring_buffer,
 270         },
 271         {
 272                 .desc = "Print cpu map",
 273                 .func = test__cpu_map_print,
 274         },
 275         {
 276                 .desc = "Merge cpu map",
 277                 .func = test__cpu_map_merge,
 278         },
 279
 280         {
 281                 .desc = "Probe SDT events",
 282                 .func = test__sdt_event,
 283         },
 284         {
 285                 .desc = "is_printable_array",
 286                 .func = test__is_printable_array,
 287         },
 288         {
 289                 .desc = "Print bitmap",
 290                 .func = test__bitmap_print,
 291         },
 292         {
 293                 .desc = "perf hooks",
 294                 .func = test__perf_hooks,
 295         },
 296         {
 297                 .desc = "builtin clang support",
 298                 .func = test__clang,
 299                 .subtest = {
 300                         .skip_if_fail   = true,
 301                         .get_nr         = test__clang_subtest_get_nr,
 302                         .get_desc       = test__clang_subtest_get_desc,
 303                 }
 304         },
 305         {
 306                 .desc = "unit_number__scnprintf",
 307                 .func = test__unit_number__scnprint,
 308         },
 309         {
 310                 .desc = "mem2node",
 311                 .func = test__mem2node,
 312         },
 313         {
 314                 .desc = "time utils",
 315                 .func = test__time_utils,
 316         },
 317         {
 318                 .desc = "Test jit_write_elf",
 319                 .func = test__jit_write_elf,
 320         },
 321         {
 322                 .desc = "Test libpfm4 support",
 323                 .func = test__pfm,
 324                 .subtest = {
 325                         .skip_if_fail   = true,
 326                         .get_nr         = test__pfm_subtest_get_nr,
 327                         .get_desc       = test__pfm_subtest_get_desc,
 328                 }
 329         },
 330         {
 331                 .desc = "Test api io",
 332                 .func = test__api_io,
 333         },
 334         {
 335                 .desc = "maps__merge_in",
 336                 .func = test__maps__merge_in,
 337         },
 338         {
 339                 .desc = "Demangle Java",
 340                 .func = test__demangle_java,
 341         },
 342         {
 343                 .desc = "Demangle OCaml",
 344                 .func = test__demangle_ocaml,
 345         },
 346         {
 347                 .desc = "Parse and process metrics",
 348                 .func = test__parse_metric,
 349         },
 350         {
 351                 .desc = "PE file support",
 352                 .func = test__pe_file_parsing,
 353         },
 354         {
 355                 .desc = "Event expansion for cgroups",
 356                 .func = test__expand_cgroup_events,
 357         },
 358         {
 359                 .desc = "Convert perf time to TSC",
 360                 .func = test__perf_time_to_tsc,
 361                 .is_supported = test__tsc_is_supported,
 362         },
 363         {
 364                 .desc = "dlfilter C API",
 365                 .func = test__dlfilter,
 366         },
 367         {
 368                 .func = NULL,
 369         },
 370 };
 371
 372 static struct test *tests[] = {
 373         generic_tests,
 374         arch_tests,
 375 };
 376
 377 static bool perf_test__matches(const char *desc, int curr, int argc, const char *argv[])
 378 {
 379         int i;
 380
 381         if (argc == 0)
 382                 return true;
 383
 384         for (i = 0; i < argc; ++i) {
 385                 char *end;
 386                 long nr = strtoul(argv[i], &end, 10);
 387
 388                 if (*end == '\0') {
 389                         if (nr == curr + 1)
 390                                 return true;
 391                         continue;
 392                 }
 393
 394                 if (strcasestr(desc, argv[i]))
 395                         return true;
 396         }
 397
 398         return false;
 399 }
 400
 401 static int run_test(struct test *test, int subtest)
 402 {
 403         int status, err = -1, child = dont_fork ? 0 : fork();
 404         char sbuf[STRERR_BUFSIZE];
 405
 406         if (child < 0) {
 407                 pr_err("failed to fork test: %s\n",
 408                         str_error_r(errno, sbuf, sizeof(sbuf)));
 409                 return -1;
 410         }
 411
 412         if (!child) {
 413                 if (!dont_fork) {
 414                         pr_debug("test child forked, pid %d\n", getpid());
 415
 416                         if (verbose <= 0) {
 417                                 int nullfd = open("/dev/null", O_WRONLY);
 418
 419                                 if (nullfd >= 0) {
 420                                         close(STDERR_FILENO);
 421                                         close(STDOUT_FILENO);
 422
 423                                         dup2(nullfd, STDOUT_FILENO);
 424                                         dup2(STDOUT_FILENO, STDERR_FILENO);
 425                                         close(nullfd);
 426                                 }
 427                         } else {
 428                                 signal(SIGSEGV, sighandler_dump_stack);
 429                                 signal(SIGFPE, sighandler_dump_stack);
 430                         }
 431                 }
 432
 433                 err = test->func(test, subtest);
 434                 if (!dont_fork)
 435                         exit(err);
 436         }
 437
 438         if (!dont_fork) {
 439                 wait(&status);
 440
 441                 if (WIFEXITED(status)) {
 442                         err = (signed char)WEXITSTATUS(status);
 443                         pr_debug("test child finished with %d\n", err);
 444                 } else if (WIFSIGNALED(status)) {
 445                         err = -1;
 446                         pr_debug("test child interrupted\n");
 447                 }
 448         }
 449
 450         return err;
 451 }
 452
 453 #define for_each_test(j, t)                                     \
 454         for (j = 0; j < ARRAY_SIZE(tests); j++) \
 455                 for (t = &tests[j][0]; t->func; t++)
 456
 457 static int test_and_print(struct test *t, bool force_skip, int subtest)
 458 {
 459         int err;
 460
 461         if (!force_skip) {
 462                 pr_debug("\n--- start ---\n");
 463                 err = run_test(t, subtest);
 464                 pr_debug("---- end ----\n");
 465         } else {
 466                 pr_debug("\n--- force skipped ---\n");
 467                 err = TEST_SKIP;
 468         }
 469
 470         if (!t->subtest.get_nr)
 471                 pr_debug("%s:", t->desc);
 472         else
 473                 pr_debug("%s subtest %d:", t->desc, subtest + 1);
 474
 475         switch (err) {
 476         case TEST_OK:
 477                 pr_info(" Ok\n");
 478                 break;
 479         case TEST_SKIP: {
 480                 const char *skip_reason = NULL;
 481                 if (t->subtest.skip_reason)
 482                         skip_reason = t->subtest.skip_reason(subtest);
 483                 if (skip_reason)
 484                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (%s)\n", skip_reason);
 485                 else
 486                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
 487         }
 488                 break;
 489         case TEST_FAIL:
 490         default:
 491                 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
 492                 break;
 493         }
 494
 495         return err;
 496 }
 497
 498 static const char *shell_test__description(char *description, size_t size,
 499                                            const char *path, const char *name)
 500 {
 501         FILE *fp;
 502         char filename[PATH_MAX];
 503
 504         path__join(filename, sizeof(filename), path, name);
 505         fp = fopen(filename, "r");
 506         if (!fp)
 507                 return NULL;
 508
 509         /* Skip shebang */
 510         while (fgetc(fp) != '\n');
 511
 512         description = fgets(description, size, fp);
 513         fclose(fp);
 514
 515         return description ? strim(description + 1) : NULL;
 516 }
 517
 518 #define for_each_shell_test(entlist, nr, base, ent)                     \
 519         for (int __i = 0; __i < nr && (ent = entlist[__i]); __i++)      \
 520                 if (!is_directory(base, ent) && ent->d_name[0] != '.')
 521
 522 static const char *shell_tests__dir(char *path, size_t size)
 523 {
 524         const char *devel_dirs[] = { "./tools/perf/tests", "./tests", };
 525         char *exec_path;
 526         unsigned int i;
 527
 528         for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
 529                 struct stat st;
 530                 if (!lstat(devel_dirs[i], &st)) {
 531                         scnprintf(path, size, "%s/shell", devel_dirs[i]);
 532                         if (!lstat(devel_dirs[i], &st))
 533                                 return path;
 534                 }
 535         }
 536
 537         /* Then installed path. */
 538         exec_path = get_argv_exec_path();
 539         scnprintf(path, size, "%s/tests/shell", exec_path);
 540         free(exec_path);
 541         return path;
 542 }
 543
 544 static int shell_tests__max_desc_width(void)
 545 {
 546         struct dirent **entlist;
 547         struct dirent *ent;
 548         int n_dirs, e;
 549         char path_dir[PATH_MAX];
 550         const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
 551         int width = 0;
 552
 553         if (path == NULL)
 554                 return -1;
 555
 556         n_dirs = scandir(path, &entlist, NULL, alphasort);
 557         if (n_dirs == -1)
 558                 return -1;
 559
 560         for_each_shell_test(entlist, n_dirs, path, ent) {
 561                 char bf[256];
 562                 const char *desc = shell_test__description(bf, sizeof(bf), path, ent->d_name);
 563
 564                 if (desc) {
 565                         int len = strlen(desc);
 566
 567                         if (width < len)
 568                                 width = len;
 569                 }
 570         }
 571
 572         for (e = 0; e < n_dirs; e++)
 573                 zfree(&entlist[e]);
 574         free(entlist);
 575         return width;
 576 }
 577
 578 struct shell_test {
 579         const char *dir;
 580         const char *file;
 581 };
 582
 583 static int shell_test__run(struct test *test, int subdir __maybe_unused)
 584 {
 585         int err;
 586         char script[PATH_MAX];
 587         struct shell_test *st = test->priv;
 588
 589         path__join(script, sizeof(script) - 3, st->dir, st->file);
 590
 591         if (verbose)
 592                 strncat(script, " -v", sizeof(script) - strlen(script) - 1);
 593
 594         err = system(script);
 595         if (!err)
 596                 return TEST_OK;
 597
 598         return WEXITSTATUS(err) == 2 ? TEST_SKIP : TEST_FAIL;
 599 }
 600
 601 static int run_shell_tests(int argc, const char *argv[], int i, int width,
 602                                 struct intlist *skiplist)
 603 {
 604         struct dirent **entlist;
 605         struct dirent *ent;
 606         int n_dirs, e;
 607         char path_dir[PATH_MAX];
 608         struct shell_test st = {
 609                 .dir = shell_tests__dir(path_dir, sizeof(path_dir)),
 610         };
 611
 612         if (st.dir == NULL)
 613                 return -1;
 614
 615         n_dirs = scandir(st.dir, &entlist, NULL, alphasort);
 616         if (n_dirs == -1) {
 617                 pr_err("failed to open shell test directory: %s\n",
 618                         st.dir);
 619                 return -1;
 620         }
 621
 622         for_each_shell_test(entlist, n_dirs, st.dir, ent) {
 623                 int curr = i++;
 624                 char desc[256];
 625                 struct test test = {
 626                         .desc = shell_test__description(desc, sizeof(desc), st.dir, ent->d_name),
 627                         .func = shell_test__run,
 628                         .priv = &st,
 629                 };
 630
 631                 if (!perf_test__matches(test.desc, curr, argc, argv))
 632                         continue;
 633
 634                 st.file = ent->d_name;
 635                 pr_info("%2d: %-*s:", i, width, test.desc);
 636
 637                 if (intlist__find(skiplist, i)) {
 638                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 639                         continue;
 640                 }
 641
 642                 test_and_print(&test, false, -1);
 643         }
 644
 645         for (e = 0; e < n_dirs; e++)
 646                 zfree(&entlist[e]);
 647         free(entlist);
 648         return 0;
 649 }
 650
 651 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
 652 {
 653         struct test *t;
 654         unsigned int j;
 655         int i = 0;
 656         int width = shell_tests__max_desc_width();
 657
 658         for_each_test(j, t) {
 659                 int len = strlen(t->desc);
 660
 661                 if (width < len)
 662                         width = len;
 663         }
 664
 665         for_each_test(j, t) {
 666                 int curr = i++, err;
 667                 int subi;
 668
 669                 if (!perf_test__matches(t->desc, curr, argc, argv)) {
 670                         bool skip = true;
 671                         int subn;
 672
 673                         if (!t->subtest.get_nr)
 674                                 continue;
 675
 676                         subn = t->subtest.get_nr();
 677
 678                         for (subi = 0; subi < subn; subi++) {
 679                                 if (perf_test__matches(t->subtest.get_desc(subi), curr, argc, argv))
 680                                         skip = false;
 681                         }
 682
 683                         if (skip)
 684                                 continue;
 685                 }
 686
 687                 if (t->is_supported && !t->is_supported()) {
 688                         pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
 689                         continue;
 690                 }
 691
 692                 pr_info("%2d: %-*s:", i, width, t->desc);
 693
 694                 if (intlist__find(skiplist, i)) {
 695                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 696                         continue;
 697                 }
 698
 699                 if (!t->subtest.get_nr) {
 700                         test_and_print(t, false, -1);
 701                 } else {
 702                         int subn = t->subtest.get_nr();
 703                         /*
 704                          * minus 2 to align with normal testcases.
 705                          * For subtest we print additional '.x' in number.
 706                          * for example:
 707                          *
 708                          * 35: Test LLVM searching and compiling                        :
 709                          * 35.1: Basic BPF llvm compiling test                          : Ok
 710                          */
 711                         int subw = width > 2 ? width - 2 : width;
 712                         bool skip = false;
 713
 714                         if (subn <= 0) {
 715                                 color_fprintf(stderr, PERF_COLOR_YELLOW,
 716                                               " Skip (not compiled in)\n");
 717                                 continue;
 718                         }
 719                         pr_info("\n");
 720
 721                         for (subi = 0; subi < subn; subi++) {
 722                                 int len = strlen(t->subtest.get_desc(subi));
 723
 724                                 if (subw < len)
 725                                         subw = len;
 726                         }
 727
 728                         for (subi = 0; subi < subn; subi++) {
 729                                 if (!perf_test__matches(t->subtest.get_desc(subi), curr, argc, argv))
 730                                         continue;
 731
 732                                 pr_info("%2d.%1d: %-*s:", i, subi + 1, subw,
 733                                         t->subtest.get_desc(subi));
 734                                 err = test_and_print(t, skip, subi);
 735                                 if (err != TEST_OK && t->subtest.skip_if_fail)
 736                                         skip = true;
 737                         }
 738                 }
 739         }
 740
 741         return run_shell_tests(argc, argv, i, width, skiplist);
 742 }
 743
 744 static int perf_test__list_shell(int argc, const char **argv, int i)
 745 {
 746         struct dirent **entlist;
 747         struct dirent *ent;
 748         int n_dirs, e;
 749         char path_dir[PATH_MAX];
 750         const char *path = shell_tests__dir(path_dir, sizeof(path_dir));
 751
 752         if (path == NULL)
 753                 return -1;
 754
 755         n_dirs = scandir(path, &entlist, NULL, alphasort);
 756         if (n_dirs == -1)
 757                 return -1;
 758
 759         for_each_shell_test(entlist, n_dirs, path, ent) {
 760                 int curr = i++;
 761                 char bf[256];
 762                 struct test t = {
 763                         .desc = shell_test__description(bf, sizeof(bf), path, ent->d_name),
 764                 };
 765
 766                 if (!perf_test__matches(t.desc, curr, argc, argv))
 767                         continue;
 768
 769                 pr_info("%2d: %s\n", i, t.desc);
 770
 771         }
 772
 773         for (e = 0; e < n_dirs; e++)
 774                 zfree(&entlist[e]);
 775         free(entlist);
 776         return 0;
 777 }
 778
 779 static int perf_test__list(int argc, const char **argv)
 780 {
 781         unsigned int j;
 782         struct test *t;
 783         int i = 0;
 784
 785         for_each_test(j, t) {
 786                 int curr = i++;
 787
 788                 if (!perf_test__matches(t->desc, curr, argc, argv) ||
 789                     (t->is_supported && !t->is_supported()))
 790                         continue;
 791
 792                 pr_info("%2d: %s\n", i, t->desc);
 793
 794                 if (t->subtest.get_nr) {
 795                         int subn = t->subtest.get_nr();
 796                         int subi;
 797
 798                         for (subi = 0; subi < subn; subi++)
 799                                 pr_info("%2d:%1d: %s\n", i, subi + 1,
 800                                         t->subtest.get_desc(subi));
 801                 }
 802         }
 803
 804         perf_test__list_shell(argc, argv, i);
 805
 806         return 0;
 807 }
 808
 809 int cmd_test(int argc, const char **argv)
 810 {
 811         const char *test_usage[] = {
 812         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
 813         NULL,
 814         };
 815         const char *skip = NULL;
 816         const struct option test_options[] = {
 817         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
 818         OPT_INCR('v', "verbose", &verbose,
 819                     "be more verbose (show symbol address, etc)"),
 820         OPT_BOOLEAN('F', "dont-fork", &dont_fork,
 821                     "Do not fork for testcase"),
 822         OPT_END()
 823         };
 824         const char * const test_subcommands[] = { "list", NULL };
 825         struct intlist *skiplist = NULL;
 826         int ret = hists__init();
 827
 828         if (ret < 0)
 829                 return ret;
 830
 831         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
 832         if (argc >= 1 && !strcmp(argv[0], "list"))
 833                 return perf_test__list(argc - 1, argv + 1);
 834
 835         symbol_conf.priv_size = sizeof(int);
 836         symbol_conf.sort_by_name = true;
 837         symbol_conf.try_vmlinux_path = true;
 838
 839         if (symbol__init(NULL) < 0)
 840                 return -1;
 841
 842         if (skip != NULL)
 843                 skiplist = intlist__new(skip);
 844         /*
 845          * Tests that create BPF maps, for instance, need more than the 64K
 846          * default:
 847          */
 848         rlimit__bump_memlock();
 849
 850         return __cmd_test(argc, argv, skiplist);
 851 }