1 /* 2 * builtin-test.c 3 * 4 * Builtin regression testing command: ever growing number of sanity tests 5 */ 6 #include <unistd.h> 7 #include <string.h> 8 #include "builtin.h" 9 #include "hist.h" 10 #include "intlist.h" 11 #include "tests.h" 12 #include "debug.h" 13 #include "color.h" 14 #include <subcmd/parse-options.h> 15 #include "symbol.h" 16 17 static bool dont_fork; 18 19 struct test __weak arch_tests[] = { 20 { 21 .func = NULL, 22 }, 23 }; 24 25 static struct test generic_tests[] = { 26 { 27 .desc = "vmlinux symtab matches kallsyms", 28 .func = test__vmlinux_matches_kallsyms, 29 }, 30 { 31 .desc = "detect openat syscall event", 32 .func = test__openat_syscall_event, 33 }, 34 { 35 .desc = "detect openat syscall event on all cpus", 36 .func = test__openat_syscall_event_on_all_cpus, 37 }, 38 { 39 .desc = "read samples using the mmap interface", 40 .func = test__basic_mmap, 41 }, 42 { 43 .desc = "parse events tests", 44 .func = test__parse_events, 45 }, 46 { 47 .desc = "Validate PERF_RECORD_* events & perf_sample fields", 48 .func = test__PERF_RECORD, 49 }, 50 { 51 .desc = "Test perf pmu format parsing", 52 .func = test__pmu, 53 }, 54 { 55 .desc = "Test dso data read", 56 .func = test__dso_data, 57 }, 58 { 59 .desc = "Test dso data cache", 60 .func = test__dso_data_cache, 61 }, 62 { 63 .desc = "Test dso data reopen", 64 .func = test__dso_data_reopen, 65 }, 66 { 67 .desc = "roundtrip evsel->name check", 68 .func = test__perf_evsel__roundtrip_name_test, 69 }, 70 { 71 .desc = "Check parsing of sched tracepoints fields", 72 .func = test__perf_evsel__tp_sched_test, 73 }, 74 { 75 .desc = "Generate and check syscalls:sys_enter_openat event fields", 76 .func = test__syscall_openat_tp_fields, 77 }, 78 { 79 .desc = "struct perf_event_attr setup", 80 .func = test__attr, 81 }, 82 { 83 .desc = "Test matching and linking multiple hists", 84 .func = test__hists_link, 85 }, 86 { 87 .desc = "Try 'import perf' in python, checking link problems", 88 .func = test__python_use, 89 }, 90 { 91 .desc = "Test breakpoint overflow signal handler", 92 .func = test__bp_signal, 93 }, 94 { 95 .desc = "Test breakpoint overflow sampling", 96 .func = test__bp_signal_overflow, 97 }, 98 { 99 .desc = "Test number of exit event of a simple workload", 100 .func = test__task_exit, 101 }, 102 { 103 .desc = "Test software clock events have valid period values", 104 .func = test__sw_clock_freq, 105 }, 106 { 107 .desc = "Test object code reading", 108 .func = test__code_reading, 109 }, 110 { 111 .desc = "Test sample parsing", 112 .func = test__sample_parsing, 113 }, 114 { 115 .desc = "Test using a dummy software event to keep tracking", 116 .func = test__keep_tracking, 117 }, 118 { 119 .desc = "Test parsing with no sample_id_all bit set", 120 .func = test__parse_no_sample_id_all, 121 }, 122 { 123 .desc = "Test filtering hist entries", 124 .func = test__hists_filter, 125 }, 126 { 127 .desc = "Test mmap thread lookup", 128 .func = test__mmap_thread_lookup, 129 }, 130 { 131 .desc = "Test thread mg sharing", 132 .func = test__thread_mg_share, 133 }, 134 { 135 .desc = "Test output sorting of hist entries", 136 .func = test__hists_output, 137 }, 138 { 139 .desc = "Test cumulation of child hist entries", 140 .func = test__hists_cumulate, 141 }, 142 { 143 .desc = "Test tracking with sched_switch", 144 .func = test__switch_tracking, 145 }, 146 { 147 .desc = "Filter fds with revents mask in a fdarray", 148 .func = test__fdarray__filter, 149 }, 150 { 151 .desc = "Add fd to a fdarray, making it autogrow", 152 .func = test__fdarray__add, 153 }, 154 { 155 .desc = "Test kmod_path__parse function", 156 .func = test__kmod_path__parse, 157 }, 158 { 159 .desc = "Test thread map", 160 .func = test__thread_map, 161 }, 162 { 163 .desc = "Test LLVM searching and compiling", 164 .func = test__llvm, 165 .subtest = { 166 .skip_if_fail = true, 167 .get_nr = test__llvm_subtest_get_nr, 168 .get_desc = test__llvm_subtest_get_desc, 169 }, 170 }, 171 { 172 .desc = "Test topology in session", 173 .func = test_session_topology, 174 }, 175 { 176 .desc = "Test BPF filter", 177 .func = test__bpf, 178 .subtest = { 179 .skip_if_fail = true, 180 .get_nr = test__bpf_subtest_get_nr, 181 .get_desc = test__bpf_subtest_get_desc, 182 }, 183 }, 184 { 185 .desc = "Test thread map synthesize", 186 .func = test__thread_map_synthesize, 187 }, 188 { 189 .desc = "Test cpu map synthesize", 190 .func = test__cpu_map_synthesize, 191 }, 192 { 193 .desc = "Test stat config synthesize", 194 .func = test__synthesize_stat_config, 195 }, 196 { 197 .desc = "Test stat synthesize", 198 .func = test__synthesize_stat, 199 }, 200 { 201 .desc = "Test stat round synthesize", 202 .func = test__synthesize_stat_round, 203 }, 204 { 205 .desc = "Test attr update synthesize", 206 .func = test__event_update, 207 }, 208 { 209 .desc = "Test events times", 210 .func = test__event_times, 211 }, 212 { 213 .desc = "Test backward reading from ring buffer", 214 .func = test__backward_ring_buffer, 215 }, 216 { 217 .desc = "Test cpu map print", 218 .func = test__cpu_map_print, 219 }, 220 { 221 .desc = "Test SDT event probing", 222 .func = test__sdt_event, 223 }, 224 { 225 .func = NULL, 226 }, 227 }; 228 229 static struct test *tests[] = { 230 generic_tests, 231 arch_tests, 232 }; 233 234 static bool perf_test__matches(struct test *test, int curr, int argc, const char *argv[]) 235 { 236 int i; 237 238 if (argc == 0) 239 return true; 240 241 for (i = 0; i < argc; ++i) { 242 char *end; 243 long nr = strtoul(argv[i], &end, 10); 244 245 if (*end == '\0') { 246 if (nr == curr + 1) 247 return true; 248 continue; 249 } 250 251 if (strcasestr(test->desc, argv[i])) 252 return true; 253 } 254 255 return false; 256 } 257 258 static int run_test(struct test *test, int subtest) 259 { 260 int status, err = -1, child = dont_fork ? 0 : fork(); 261 char sbuf[STRERR_BUFSIZE]; 262 263 if (child < 0) { 264 pr_err("failed to fork test: %s\n", 265 str_error_r(errno, sbuf, sizeof(sbuf))); 266 return -1; 267 } 268 269 if (!child) { 270 if (!dont_fork) { 271 pr_debug("test child forked, pid %d\n", getpid()); 272 273 if (!verbose) { 274 int nullfd = open("/dev/null", O_WRONLY); 275 276 if (nullfd >= 0) { 277 close(STDERR_FILENO); 278 close(STDOUT_FILENO); 279 280 dup2(nullfd, STDOUT_FILENO); 281 dup2(STDOUT_FILENO, STDERR_FILENO); 282 close(nullfd); 283 } 284 } else { 285 signal(SIGSEGV, sighandler_dump_stack); 286 signal(SIGFPE, sighandler_dump_stack); 287 } 288 } 289 290 err = test->func(subtest); 291 if (!dont_fork) 292 exit(err); 293 } 294 295 if (!dont_fork) { 296 wait(&status); 297 298 if (WIFEXITED(status)) { 299 err = (signed char)WEXITSTATUS(status); 300 pr_debug("test child finished with %d\n", err); 301 } else if (WIFSIGNALED(status)) { 302 err = -1; 303 pr_debug("test child interrupted\n"); 304 } 305 } 306 307 return err; 308 } 309 310 #define for_each_test(j, t) \ 311 for (j = 0; j < ARRAY_SIZE(tests); j++) \ 312 for (t = &tests[j][0]; t->func; t++) 313 314 static int test_and_print(struct test *t, bool force_skip, int subtest) 315 { 316 int err; 317 318 if (!force_skip) { 319 pr_debug("\n--- start ---\n"); 320 err = run_test(t, subtest); 321 pr_debug("---- end ----\n"); 322 } else { 323 pr_debug("\n--- force skipped ---\n"); 324 err = TEST_SKIP; 325 } 326 327 if (!t->subtest.get_nr) 328 pr_debug("%s:", t->desc); 329 else 330 pr_debug("%s subtest %d:", t->desc, subtest); 331 332 switch (err) { 333 case TEST_OK: 334 pr_info(" Ok\n"); 335 break; 336 case TEST_SKIP: 337 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n"); 338 break; 339 case TEST_FAIL: 340 default: 341 color_fprintf(stderr, PERF_COLOR_RED, " FAILED!\n"); 342 break; 343 } 344 345 return err; 346 } 347 348 static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist) 349 { 350 struct test *t; 351 unsigned int j; 352 int i = 0; 353 int width = 0; 354 355 for_each_test(j, t) { 356 int len = strlen(t->desc); 357 358 if (width < len) 359 width = len; 360 } 361 362 for_each_test(j, t) { 363 int curr = i++, err; 364 365 if (!perf_test__matches(t, curr, argc, argv)) 366 continue; 367 368 pr_info("%2d: %-*s:", i, width, t->desc); 369 370 if (intlist__find(skiplist, i)) { 371 color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (user override)\n"); 372 continue; 373 } 374 375 if (!t->subtest.get_nr) { 376 test_and_print(t, false, -1); 377 } else { 378 int subn = t->subtest.get_nr(); 379 /* 380 * minus 2 to align with normal testcases. 381 * For subtest we print additional '.x' in number. 382 * for example: 383 * 384 * 35: Test LLVM searching and compiling : 385 * 35.1: Basic BPF llvm compiling test : Ok 386 */ 387 int subw = width > 2 ? width - 2 : width; 388 bool skip = false; 389 int subi; 390 391 if (subn <= 0) { 392 color_fprintf(stderr, PERF_COLOR_YELLOW, 393 " Skip (not compiled in)\n"); 394 continue; 395 } 396 pr_info("\n"); 397 398 for (subi = 0; subi < subn; subi++) { 399 int len = strlen(t->subtest.get_desc(subi)); 400 401 if (subw < len) 402 subw = len; 403 } 404 405 for (subi = 0; subi < subn; subi++) { 406 pr_info("%2d.%1d: %-*s:", i, subi + 1, subw, 407 t->subtest.get_desc(subi)); 408 err = test_and_print(t, skip, subi); 409 if (err != TEST_OK && t->subtest.skip_if_fail) 410 skip = true; 411 } 412 } 413 } 414 415 return 0; 416 } 417 418 static int perf_test__list(int argc, const char **argv) 419 { 420 unsigned int j; 421 struct test *t; 422 int i = 0; 423 424 for_each_test(j, t) { 425 if (argc > 1 && !strstr(t->desc, argv[1])) 426 continue; 427 428 pr_info("%2d: %s\n", ++i, t->desc); 429 } 430 431 return 0; 432 } 433 434 int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused) 435 { 436 const char *test_usage[] = { 437 "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]", 438 NULL, 439 }; 440 const char *skip = NULL; 441 const struct option test_options[] = { 442 OPT_STRING('s', "skip", &skip, "tests", "tests to skip"), 443 OPT_INCR('v', "verbose", &verbose, 444 "be more verbose (show symbol address, etc)"), 445 OPT_BOOLEAN('F', "dont-fork", &dont_fork, 446 "Do not fork for testcase"), 447 OPT_END() 448 }; 449 const char * const test_subcommands[] = { "list", NULL }; 450 struct intlist *skiplist = NULL; 451 int ret = hists__init(); 452 453 if (ret < 0) 454 return ret; 455 456 argc = parse_options_subcommand(argc, argv, test_options, test_subcommands, test_usage, 0); 457 if (argc >= 1 && !strcmp(argv[0], "list")) 458 return perf_test__list(argc, argv); 459 460 symbol_conf.priv_size = sizeof(int); 461 symbol_conf.sort_by_name = true; 462 symbol_conf.try_vmlinux_path = true; 463 464 if (symbol__init(NULL) < 0) 465 return -1; 466 467 if (skip != NULL) 468 skiplist = intlist__new(skip); 469 470 return __cmd_test(argc, argv, skiplist); 471 } 472