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/wait.h>
  10 #include "builtin.h"
  11 #include "hist.h"
  12 #include "intlist.h"
  13 #include "tests.h"
  14 #include "debug.h"
  15 #include "color.h"
  16 #include <subcmd/parse-options.h>
  17 #include "symbol.h"
  18 #include <linux/kernel.h>
  19
  20 static bool dont_fork;
  21
  22 struct test __weak arch_tests[] = {
  23         {
  24                 .func = NULL,
  25         },
  26 };
  27
  28 static struct test generic_tests[] = {
  29         {
  30                 .desc = "vmlinux symtab matches kallsyms",
  31                 .func = test__vmlinux_matches_kallsyms,
  32         },
  33         {
  34                 .desc = "Detect openat syscall event",
  35                 .func = test__openat_syscall_event,
  36         },
  37         {
  38                 .desc = "Detect openat syscall event on all cpus",
  39                 .func = test__openat_syscall_event_on_all_cpus,
  40         },
  41         {
  42                 .desc = "Read samples using the mmap interface",
  43                 .func = test__basic_mmap,
  44         },
  45         {
  46                 .desc = "Parse event definition strings",
  47                 .func = test__parse_events,
  48         },
  49         {
  50                 .desc = "Simple expression parser",
  51                 .func = test__expr,
  52         },
  53         {
  54                 .desc = "PERF_RECORD_* events & perf_sample fields",
  55                 .func = test__PERF_RECORD,
  56         },
  57         {
  58                 .desc = "Parse perf pmu format",
  59                 .func = test__pmu,
  60         },
  61         {
  62                 .desc = "DSO data read",
  63                 .func = test__dso_data,
  64         },
  65         {
  66                 .desc = "DSO data cache",
  67                 .func = test__dso_data_cache,
  68         },
  69         {
  70                 .desc = "DSO data reopen",
  71                 .func = test__dso_data_reopen,
  72         },
  73         {
  74                 .desc = "Roundtrip evsel->name",
  75                 .func = test__perf_evsel__roundtrip_name_test,
  76         },
  77         {
  78                 .desc = "Parse sched tracepoints fields",
  79                 .func = test__perf_evsel__tp_sched_test,
  80         },
  81         {
  82                 .desc = "syscalls:sys_enter_openat event fields",
  83                 .func = test__syscall_openat_tp_fields,
  84         },
  85         {
  86                 .desc = "Setup struct perf_event_attr",
  87                 .func = test__attr,
  88         },
  89         {
  90                 .desc = "Match and link multiple hists",
  91                 .func = test__hists_link,
  92         },
  93         {
  94                 .desc = "'import perf' in python",
  95                 .func = test__python_use,
  96         },
  97         {
  98                 .desc = "Breakpoint overflow signal handler",
  99                 .func = test__bp_signal,
 100                 .is_supported = test__bp_signal_is_supported,
 101         },
 102         {
 103                 .desc = "Breakpoint overflow sampling",
 104                 .func = test__bp_signal_overflow,
 105                 .is_supported = test__bp_signal_is_supported,
 106         },
 107         {
 108                 .desc = "Number of exit events of a simple workload",
 109                 .func = test__task_exit,
 110         },
 111         {
 112                 .desc = "Software clock events period values",
 113                 .func = test__sw_clock_freq,
 114         },
 115         {
 116                 .desc = "Object code reading",
 117                 .func = test__code_reading,
 118         },
 119         {
 120                 .desc = "Sample parsing",
 121                 .func = test__sample_parsing,
 122         },
 123         {
 124                 .desc = "Use a dummy software event to keep tracking",
 125                 .func = test__keep_tracking,
 126         },
 127         {
 128                 .desc = "Parse with no sample_id_all bit set",
 129                 .func = test__parse_no_sample_id_all,
 130         },
 131         {
 132                 .desc = "Filter hist entries",
 133                 .func = test__hists_filter,
 134         },
 135         {
 136                 .desc = "Lookup mmap thread",
 137                 .func = test__mmap_thread_lookup,
 138         },
 139         {
 140                 .desc = "Share thread mg",
 141                 .func = test__thread_mg_share,
 142         },
 143         {
 144                 .desc = "Sort output of hist entries",
 145                 .func = test__hists_output,
 146         },
 147         {
 148                 .desc = "Cumulate child hist entries",
 149                 .func = test__hists_cumulate,
 150         },
 151         {
 152                 .desc = "Track with sched_switch",
 153                 .func = test__switch_tracking,
 154         },
 155         {
 156                 .desc = "Filter fds with revents mask in a fdarray",
 157                 .func = test__fdarray__filter,
 158         },
 159         {
 160                 .desc = "Add fd to a fdarray, making it autogrow",
 161                 .func = test__fdarray__add,
 162         },
 163         {
 164                 .desc = "kmod_path__parse",
 165                 .func = test__kmod_path__parse,
 166         },
 167         {
 168                 .desc = "Thread map",
 169                 .func = test__thread_map,
 170         },
 171         {
 172                 .desc = "LLVM search and compile",
 173                 .func = test__llvm,
 174                 .subtest = {
 175                         .skip_if_fail   = true,
 176                         .get_nr         = test__llvm_subtest_get_nr,
 177                         .get_desc       = test__llvm_subtest_get_desc,
 178                 },
 179         },
 180         {
 181                 .desc = "Session topology",
 182                 .func = test_session_topology,
 183         },
 184         {
 185                 .desc = "BPF filter",
 186                 .func = test__bpf,
 187                 .subtest = {
 188                         .skip_if_fail   = true,
 189                         .get_nr         = test__bpf_subtest_get_nr,
 190                         .get_desc       = test__bpf_subtest_get_desc,
 191                 },
 192         },
 193         {
 194                 .desc = "Synthesize thread map",
 195                 .func = test__thread_map_synthesize,
 196         },
 197         {
 198                 .desc = "Remove thread map",
 199                 .func = test__thread_map_remove,
 200         },
 201         {
 202                 .desc = "Synthesize cpu map",
 203                 .func = test__cpu_map_synthesize,
 204         },
 205         {
 206                 .desc = "Synthesize stat config",
 207                 .func = test__synthesize_stat_config,
 208         },
 209         {
 210                 .desc = "Synthesize stat",
 211                 .func = test__synthesize_stat,
 212         },
 213         {
 214                 .desc = "Synthesize stat round",
 215                 .func = test__synthesize_stat_round,
 216         },
 217         {
 218                 .desc = "Synthesize attr update",
 219                 .func = test__event_update,
 220         },
 221         {
 222                 .desc = "Event times",
 223                 .func = test__event_times,
 224         },
 225         {
 226                 .desc = "Read backward ring buffer",
 227                 .func = test__backward_ring_buffer,
 228         },
 229         {
 230                 .desc = "Print cpu map",
 231                 .func = test__cpu_map_print,
 232         },
 233         {
 234                 .desc = "Probe SDT events",
 235                 .func = test__sdt_event,
 236         },
 237         {
 238                 .desc = "is_printable_array",
 239                 .func = test__is_printable_array,
 240         },
 241         {
 242                 .desc = "Print bitmap",
 243                 .func = test__bitmap_print,
 244         },
 245         {
 246                 .desc = "perf hooks",
 247                 .func = test__perf_hooks,
 248         },
 249         {
 250                 .desc = "builtin clang support",
 251                 .func = test__clang,
 252                 .subtest = {
 253                         .skip_if_fail   = true,
 254                         .get_nr         = test__clang_subtest_get_nr,
 255                         .get_desc       = test__clang_subtest_get_desc,
 256                 }
 257         },
 258         {
 259                 .desc = "unit_number__scnprintf",
 260                 .func = test__unit_number__scnprint,
 261         },
 262         {
 263                 .func = NULL,
 264         },
 265 };
 266
 267 static struct test *tests[] = {
 268         generic_tests,
 269         arch_tests,
 270 };
 271
 272 static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[])
 273 {
 274         int i;
 275
 276         if (argc == 0)
 277                 return true;
 278
 279         for (i = 0; i < argc; ++i) {
 280                 char *end;
 281                 long nr = strtoul(argv[i], &end, 10);
 282
 283                 if (*end == '\0') {
 284                         if (nr == curr + 1)
 285                                 return true;
 286                         continue;
 287                 }
 288
 289                 if (strcasestr(test->desc, argv[i]))
 290                         return true;
 291         }
 292
 293         return false;
 294 }
 295
 296 static int run_test(struct test *test, int subtest)
 297 {
 298         int status, err = -1, child = dont_fork ? 0 : fork();
 299         char sbuf[STRERR_BUFSIZE];
 300
 301         if (child < 0) {
 302                 pr_err("failed to fork test: %s\n",
 303                         str_error_r(errno, sbuf, sizeof(sbuf)));
 304                 return -1;
 305         }
 306
 307         if (!child) {
 308                 if (!dont_fork) {
 309                         pr_debug("test child forked, pid %d\n", getpid());
 310
 311                         if (verbose <= 0) {
 312                                 int nullfd = open("/dev/null", O_WRONLY);
 313
 314                                 if (nullfd >= 0) {
 315                                         close(STDERR_FILENO);
 316                                         close(STDOUT_FILENO);
 317
 318                                         dup2(nullfd, STDOUT_FILENO);
 319                                         dup2(STDOUT_FILENO, STDERR_FILENO);
 320                                         close(nullfd);
 321                                 }
 322                         } else {
 323                                 signal(SIGSEGV, sighandler_dump_stack);
 324                                 signal(SIGFPE, sighandler_dump_stack);
 325                         }
 326                 }
 327
 328                 err = test->func(subtest);
 329                 if (!dont_fork)
 330                         exit(err);
 331         }
 332
 333         if (!dont_fork) {
 334                 wait(&status);
 335
 336                 if (WIFEXITED(status)) {
 337                         err = (signed char)WEXITSTATUS(status);
 338                         pr_debug("test child finished with %d\n", err);
 339                 } else if (WIFSIGNALED(status)) {
 340                         err = -1;
 341                         pr_debug("test child interrupted\n");
 342                 }
 343         }
 344
 345         return err;
 346 }
 347
 348 #define for_each_test(j, t)                                     \
 349         for (j = 0; j < ARRAY_SIZE(tests); j++) \
 350                 for (t = &tests[j][0]; t->func; t++)
 351
 352 static int test_and_print(struct test *t, bool force_skip, int subtest)
 353 {
 354         int err;
 355
 356         if (!force_skip) {
 357                 pr_debug("\n--- start ---\n");
 358                 err = run_test(t, subtest);
 359                 pr_debug("---- end ----\n");
 360         } else {
 361                 pr_debug("\n--- force skipped ---\n");
 362                 err = TEST_SKIP;
 363         }
 364
 365         if (!t->subtest.get_nr)
 366                 pr_debug("%s:", t->desc);
 367         else
 368                 pr_debug("%s subtest %d:", t->desc, subtest);
 369
 370         switch (err) {
 371         case TEST_OK:
 372                 pr_info(" Ok\n");
 373                 break;
 374         case TEST_SKIP:
 375                 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
 376                 break;
 377         case TEST_FAIL:
 378         default:
 379                 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n");
 380                 break;
 381         }
 382
 383         return err;
 384 }
 385
 386 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
 387 {
 388         struct test *t;
 389         unsigned int j;
 390         int i = 0;
 391         int width = 0;
 392
 393         for_each_test(j, t) {
 394                 int len = strlen(t->desc);
 395
 396                 if (width < len)
 397                         width = len;
 398         }
 399
 400         for_each_test(j, t) {
 401                 int curr = i++, err;
 402
 403                 if (!perf_test__matches(t, curr, argc, argv))
 404                         continue;
 405
 406                 if (t->is_supported && !t->is_supported()) {
 407                         pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
 408                         continue;
 409                 }
 410
 411                 pr_info("%2d: %-*s:", i, width, t->desc);
 412
 413                 if (intlist__find(skiplist, i)) {
 414                         color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n");
 415                         continue;
 416                 }
 417
 418                 if (!t->subtest.get_nr) {
 419                         test_and_print(t, false, -1);
 420                 } else {
 421                         int subn = t->subtest.get_nr();
 422                         /*
 423                          * minus 2 to align with normal testcases.
 424                          * For subtest we print additional '.x' in number.
 425                          * for example:
 426                          *
 427                          * 35: Test LLVM searching and compiling                        :
 428                          * 35.1: Basic BPF llvm compiling test                          : Ok
 429                          */
 430                         int subw = width > 2 ? width - 2 : width;
 431                         bool skip = false;
 432                         int subi;
 433
 434                         if (subn <= 0) {
 435                                 color_fprintf(stderr, PERF_COLOR_YELLOW,
 436                                               " Skip (not compiled in)\n");
 437                                 continue;
 438                         }
 439                         pr_info("\n");
 440
 441                         for (subi = 0; subi < subn; subi++) {
 442                                 int len = strlen(t->subtest.get_desc(subi));
 443
 444                                 if (subw < len)
 445                                         subw = len;
 446                         }
 447
 448                         for (subi = 0; subi < subn; subi++) {
 449                                 pr_info("%2d.%1d: %-*s:", i, subi + 1, subw,
 450                                         t->subtest.get_desc(subi));
 451                                 err = test_and_print(t, skip, subi);
 452                                 if (err != TEST_OK && t->subtest.skip_if_fail)
 453                                         skip = true;
 454                         }
 455                 }
 456         }
 457
 458         return 0;
 459 }
 460
 461 static int perf_test__list(int argc, const char **argv)
 462 {
 463         unsigned int j;
 464         struct test *t;
 465         int i = 0;
 466
 467         for_each_test(j, t) {
 468                 if (argc > 1 && !strstr(t->desc, argv[1]))
 469                         continue;
 470
 471                 pr_info("%2d: %s\n", ++i, t->desc);
 472         }
 473
 474         return 0;
 475 }
 476
 477 int cmd_test(int argc, const char **argv)
 478 {
 479         const char *test_usage[] = {
 480         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
 481         NULL,
 482         };
 483         const char *skip = NULL;
 484         const struct option test_options[] = {
 485         OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),
 486         OPT_INCR('v', "verbose", &verbose,
 487                     "be more verbose (show symbol address, etc)"),
 488         OPT_BOOLEAN('F', "dont-fork", &dont_fork,
 489                     "Do not fork for testcase"),
 490         OPT_END()
 491         };
 492         const char * const test_subcommands[] = { "list", NULL };
 493         struct intlist *skiplist = NULL;
 494         int ret = hists__init();
 495
 496         if (ret < 0)
 497                 return ret;
 498
 499         argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0);
 500         if (argc >= 1 && !strcmp(argv[0], "list"))
 501                 return perf_test__list(argc, argv);
 502
 503         symbol_conf.priv_size = sizeof(int);
 504         symbol_conf.sort_by_name = true;
 505         symbol_conf.try_vmlinux_path = true;
 506
 507         if (symbol__init(NULL) < 0)
 508                 return -1;
 509
 510         if (skip != NULL)
 511                 skiplist = intlist__new(skip);
 512
 513         return __cmd_test(argc, argv, skiplist);
 514 }